US20250387664A1

US20250387664A1 - Tread-Based Machine with Configurable Support Surface

Info

Publication number: US20250387664A1
Application number: US19/244,636
Authority: US
Inventors: Kevin Banas
Original assignee: Multi Modal Fitness Inc
Current assignee: Multi Modal Fitness Inc
Priority date: 2024-06-21
Filing date: 2025-06-20
Publication date: 2025-12-25
Also published as: WO2025265037A1

Abstract

A tread-based machine includes a frame. The frame includes a front roller, a back roller, and a support surface positioned between the front roller and the back roller. The support surface is flat during a first operation mode for the tread-based machine, and the support surface is curved during a second operation mode for the tread-based machine. The tread-based machine also includes a belt wrapped around at least a portion of the front roller and at least a portion of the back roller such that movement of the belt causes rotation of the front roller and the back roller.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to U.S. Provisional Patent Application No. 63/662,626, filed Jun. 21, 2024, titled “Tread-Based Machine with Configurable Support Surface,” the entirety of which is incorporated herein by reference.

FIELD

The present disclosure generally relates to exercise equipment, and more particularly, to a tread-based machine with a configurable support surface.

BACKGROUND

This background description is provided for the purpose of generally presenting the context of the disclosure. Unless otherwise indicated herein, material described in this section is neither expressly nor impliedly admitted to be prior art to the present disclosure or the appended claims.
One method of exercise is sled training. Sled training is a form of functional resistance training that provides a full body stimulus. To illustrate, during sled training, a participant pulls or pushes a sled across a ground surface. The full body stimulus is based at least in part on resistance created during sled training. The resistance is a byproduct of the friction created by the sled and the ground surface. In some scenarios, the participant can increase the friction by placing one or more weights on the sled prior to pushing or pulling the sled across the ground surface.
In some scenarios, sled training may be performed indoors. If the sled training is performed indoors, the participant may push or pull the sled across rubber matting or indoor turf. In other scenarios, sled training may be performed outdoors. If the sled training is performed outdoors, the participant may push or pull the sled across pavement, grass, or outdoor turf.
While sled training can be used as a mechanism of strength training, anaerobic training (e.g., interval training), and/or aerobic training (e.g., continuous training), there are many drawbacks that reduce the feasibility of sled training. For example, sled training may require a significant amount of indoor space and/or outdoor space. Additionally, inclement weather and/or cold climates may preclude the use of sleds.
In some scenarios, during sled training, it may be difficult for a participant to create a desired resistance. For example, friction may greatly vary based on the composition of the ground surface. While friction can be adjusted by manually adding weights (e.g., plates) to the sled or removing weights from the sled, changing the resistance via adding or removing weights may be inconvenient and time consuming. Furthermore, it may be difficult for the participant to track vital metrics during sled training unless the participant has dedicated tools (e.g., accessories) to track the metrics.

SUMMARY

The present application is directed to increasing the feasibility of sled-based training. In particular, the present application is directed to a tread-based machine that is configurable to transition between (1) a first operation mode for sled training and (2) a second operation mode for traditional treadmill cardiovascular activity, such as cardiovascular activity on a curved, non-motorized, treadmill.
The tread-based machine may include a frame. In examples, the frame includes a front roller, a back roller, and a support surface positioned between the front roller and the back roller. In examples, a belt is wrapped around the front roller and the back roller such that movement of the belt causes rotation of the front roller and the back roller. In examples, the belt may include anti-slip treads that provide traction for a user of the tread-based machine. In examples, a sled post may be coupled to a front side of the frame. The design and/or configuration of the sled post may vary based on different implementations.
In particular, in examples, the sled post may be proximate to the front roller. As described in greater detail below, while facilitating movement of the belt using one's legs, the user may hold on to the sled post to simulate a pushing motion associated with traditional sled training. Alternatively, in examples, the user may couple one end of a cable to an attachment hook of the sled post and the other end of the cable to a wearable accessory or a handheld accessory, such as a belt or handles. In this scenario, in examples, the user may simulate a pulling motion associated with traditional sled training by moving on the belt in a direction opposite the sled post.
In examples, a lever may also be coupled to the frame. In examples, the lever may be used to transition the tread-based machine between the first operation mode and the second operation mode. In examples, when the lever is in a first position, the tread-based machine may be in the first operation mode. In the first operation mode, in examples, the support surface of the tread-based machine may be flat. In examples, the first operation mode may enable the user to simulate traditional sled training. To illustrate, during the first operation mode, in examples, the user may hold on to the sled post and move (e.g., walk or run) on the belt. If the user wants to engage in “push” sled training, the user may (1) face the front of the tread-based machine, hold on to the sled post, and move (e.g., walk or run) in a forward direction. If the user wants to engage in “pull” sled training, the user may (1) attach a belt to their waist, couple a cable to the belt and to the attachment hook, face the back of the tread-based machine, and move in a forward direction or (2) face the front of the tread-based machine, hold on to the sled post (or the accessory), and move in a backward direction. In some implementations, a rear attachment hook may be located proximate to a rear of the tread-based machine. In these example implementations, if the user wants to engage in “pull” sled training, the user may attach a belt to their waist, couple a cable to the belt and to the rear attachment hook, face the front of the tread-based machine, and move in a forward direction.
During the first operation mode, to create the desired amount of friction for the sled training, in some examples, the user may adjust a resistance controller on the tread-based machine. In examples, the resistance controller may be configured to adjust the amount of resistance associated with the movement of the belt. Thus, in examples, if the user wants to feel as if they are pushing (or pulling) more weight during sled training, the user may increase the resistance using the resistance controller. However, if the user wants to feel as if they are pushing (or pulling) less weight during sled training, the user may decrease the resistance using the resistance controller. Other examples are possible.
In examples, when the lever is in a second position, the tread-based machine may transition into the second operation mode. In examples, in the second operation mode, the support surface of the tread-based machine may be curved. In examples, the second operation mode may enable the user to engage in traditional treadmill cardiovascular activity (e.g., running and/or walking). For example, during the second operation mode, the user may release their hands from the sled post, grab posts attached to the guard rails, and move (e.g., walk or run) forward on the belt. In examples, the resistance associated with movement of the belt may be greatly reduced compared to the resistance during the first operation mode. As a result, during the second operation mode, the tread-based machine may operate as a self-propelled treadmill.
In examples, the tread-based machine described herein may also resolve the drawbacks associated with traditional sled training. For example, the tread-based machine reduces the need for a significant amount of indoor space and/or outdoor space for sled training. In particular, the tread-based machine may be similar in size to a traditional treadmill, and similar to a treadmill, while the user may be moving along on the belt of the tread-based machine, the tread-based machine remains stationary. Furthermore, the tread-based machine may be stored indoors so that sled training is not subject to inclement weather and/or cold climates.
In examples, the resistance controller simplifies the process of creating a desired resistance. Thus, the user may not have to add (or remove) weights to change the resistance. Rather, the user can change the resistance by adjusting a setting on the resistance controller, which improves convenience and saves time. In examples, the resistance controller also eliminates friction discrepancies that typically occur when using a sled on different surfaces. Furthermore, in examples, the tread-based machine includes one or more monitors to track metrics, such as one or more of the following: (i) number of calories burned; (ii) a simulated distance travelled; (iii) a simulated weight applied to belt; (iv) power output; and/or (v) acceleration. Thus, in examples, the tread-based machine reduces the need for the user to have dedicated tools to track different exercise metrics.
In one aspect, the present application discloses a tread-based machine. In examples, the tread-based machine includes a frame. In examples, the frame includes a front roller, a back roller, and a support surface positioned between the front roller and the back roller. In examples, the support surface is flat during a first operation mode for the tread-based machine, and the support surface is curved during a second operation mode for the tread-based machine. In examples, the tread-based machine also includes a belt wrapped around at least a portion of the front roller and at least a portion of the back roller such that movement of the belt causes rotation of the front roller and the back roller.
In another aspect, the present application discloses a tread-based machine. In examples, the tread-based machine includes a frame. In examples, the frame includes a front roller, a back roller, and a support surface positioned between the front roller and the back roller. In examples, in a first position, the support surface is flat and there is a first height difference between the front roller and the back roller. In examples, in a second position, the support surface is curved and there is a second height difference, greater than the first height difference, between the front roller and the back roller. In examples, the tread-based machine also includes a belt wrapped around at least a portion of the front roller and at least a portion of the back roller such that movement of the belt causes rotation of the front roller and the back roller.
In another aspect, the present application discloses example methods of building, configuring, and operating a tread-based machine. In examples, the method includes building a frame of the tread-based machine. In examples, the frame includes a front roller, a back roller, and a support surface positioned between the front roller and the back roller. In examples, the support surface is flat during a first operation mode for the tread-based machine, and the support surface is curved during a second operation mode for the tread-based machine. In examples, the method also includes placing a belt around at least a portion of the front roller and at least a portion of the back roller such that movement of the belt causes rotation of the front roller and the back roller.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the figures and the following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete understanding of embodiments of the present application may be derived by referring to the detailed description and claims when considered in conjunction with the following figures, wherein like reference numbers may refer to similar elements throughout the figures. The figures are provided to facilitate understanding of the disclosure without limiting the breadth, scope, scale, or applicability of the disclosure. The drawings are not necessarily made to scale.

FIG. 1 illustrates a diagram of a tread-based machine in a sled training configuration, according to an example embodiment;

FIG. 2 illustrates a diagram of the tread-based machine in a curved treadmill configuration, according to an example embodiment;

FIG. 3 illustrates a diagram of the tread-based machine with an adjustable sled post, according to an example embodiment;

FIG. 4 illustrates another diagram of the tread-based machine with the adjustable sled post, according to an example embodiment;

FIG. 5 illustrates a top view of the tread-based machine, according to an example embodiment;

FIG. 6 is a flowchart of an example of an implementation of a method, according to an example embodiment;

FIG. 7 is a rear left perspective view of a tread-based machine, according to an example embodiment;

FIG. 8 is an exploded view of the tread-based machine of FIG. 7 , according to an example embodiment;

FIG. 9 is a left elevation view of the tread-based machine of FIG. 7 , with a panel of the tread-based machine shown transparently to show a cam mechanism of the tread-based machine, according to an example embodiment;

FIG. 10 a is a cross-sectional view of the tread-based machine of FIG. 7 , illustrating a belt of the tread-based machine in a curved configuration, according to an example embodiment;

FIG. 10 b is a cross-sectional view of the tread-based machine of FIG. 7 , illustrating the belt in a flat configuration according to an example embodiment;

FIG. 11 is a perspective view of a cam assembly for the tread-based machine of FIG. 7 , according to an example embodiment; and

FIG. 12 is a block diagram showing a control system of a tread-based machine, according to an example embodiment.

DETAILED DESCRIPTION

The figures and the following description illustrate specific example embodiments. It will be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles described herein and are included within the scope of the claims that follow this description. Furthermore, any examples described herein are intended to aid in understanding the principles of the disclosure and are to be construed as being without limitation. As a result, this disclosure is not limited to the specific embodiments or examples described below, but by the claims and their equivalents.
Particular implementations are described herein with reference to the drawings. In the description, common features may be designated by common reference numbers throughout the drawings. In some drawings, multiple instances of a particular type of feature are used. Although these features are physically and/or logically distinct, the same reference number is used for each, and the different instances are distinguished by addition of a letter to the reference number. When the features as a group or a type are referred to herein (e.g., when no particular one of the features is being referenced), the reference number is used without a distinguishing letter. However, when one particular feature of multiple features of the same type is referred to herein, the reference number may be used with or without the distinguishing letter.
As used herein, various terminology is used for the purpose of describing particular implementations only and is not intended to be limiting. For example, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, the terms “comprise,” “comprises,” and “comprising” are used interchangeably with “include,” “includes,” or “including.” Additionally, the term “wherein” is used interchangeably with the term “where.” As used herein, “example” indicates an example, an implementation, and/or an aspect, and should not be construed as limiting or as indicating a preference or a preferred implementation. As used herein, an ordinal term (e.g., “first,” “second,” “third,” etc.) used to modify an element, such as a structure, a component, an operation, etc., does not by itself indicate any priority or order of the element with respect to another element, but rather merely distinguishes the element from another element having a same name (but for use of the ordinal term). As used herein, the term “set” refers to a grouping of one or more elements, and the term “plurality” refers to multiple elements.
Referring to FIG. 1 , a diagram of a tread-based machine 100 in a sled training configuration is illustrated, according to an example embodiment. In examples, the tread-based machine 100 may be configurable to transition between (1) a first operation mode for sled training and (2) a second operation mode for traditional treadmill cardiovascular activity, such as cardiovascular activity on a curved, self-propelled, treadmill. In FIG. 1 , the tread-based machine 100 is in the first operation mode.
The tread-based machine 100 includes a frame 102. The frame 102 includes a front roller 104 and a back roller 106. In FIG. 1 , the front roller 104 and the back roller 106 are depicted using dotted lines to emphasize that the front roller 104 and/or back roller 106 are internal to (e.g., integrated within) the frame 102. In examples, a support surface 108 is positioned between the front roller 104 and the back roller 106. In examples, the support surface 108 may define the configurable shape of the frame 102. For example, in FIG. 1 , the support surface 108 is flat, as the tread-based machine 100 is in the first operation mode to support sled training. However, as depicted in FIG. 2 where the tread-based machine 100 is in the second operation mode to support traditional treadmill cardiovascular activity (e.g., running and/or walking), the support surface 108 is curved.
In examples, a belt 110 is wrapped around at least a portion of the front roller 104 and at least a portion of the back roller 106. In examples, movement of the belt 110 causes rotation of the front roller 104 and rotation of the back roller 106. For example, if a user of the tread-based machine 100 walks or runs on the belt 110, traction between the user's feet and the belt 110 causes the belt to move in the opposite direction of the user's movement. Additionally, the movement of the belt 110 causes the front roller 104 and/or back roller 106 to rotate such that the belt 110 continuously revolves around the front roller 104 and/or back roller 106. In examples, the belt 110 may include anti-slip treads to provide traction between the user's feet and the belt 110. In some examples, the belt can comprise a plurality of slats having an elongate dimension in a lateral direction (e.g., transverse to a direction of motion of the belt). Slats of a belt can be connected via webbing that can be attached (e.g., screwed) to the slats, and webbings can be secured to the slates at opposite lateral sides of the slats to form a continuous belt. In some examples, a belt of a tread-based machine can be formed from a sheet of flexible material (e.g., a rubber or a polymer).
In examples, the tread-based machine 100 may include a left guard rail 112A coupled to a left side of the frame 102 and a right guard rail 112B coupled to a right side of the frame 102. During operation of the tread-based machine 100, in examples, the guard rails 112A and 112B may be used to provide stability to the user. For example, the user may place their hands on the guard rails 112A and 112B as a balancing mechanism. As described in greater detail below, the guard rails 112A and 112B can include different controls (such as the resistance controller 130) that can be used to adjust the parameters of a workout on the tread-based machine 100.
In examples, the tread-based machine 100 may also include a lever 114 that is coupled to the frame 102. In examples, the lever 114 may be configured to transition the tread-based machine 100 between the first operation mode and the second operation mode. For example, when the lever 114 is shifted into a first position, the tread-based machine 100 may transition to the first operation mode for sled training, as indicated by the support surface 108 when it is flat, as illustrated in FIG. 1 . However, when the lever 114 is shifted into a second position, in examples, the tread-based machine 100 may transition to the second operation mode for traditional treadmill cardiovascular activity (e.g., running and/or walking), as indicated by the support surface 108 and the belt 110 that are curved, as illustrated in FIG. 2 .
In examples, the tread-based machine 100 may include a back pole 190A coupled to a bottom side of the frame 102 and proximate to the back roller 106. In examples, the tread-based machine 100 may also include a front pole 190B coupled to the bottom side of the frame 102 and proximate to the front roller 104. In examples, when the lever 114 is in the first position such that the tread-based machine 100 is in the first operation mode, the back pole 190A and the front pole 190B may have substantially the same height. As a result, in examples, there may be a substantially small height difference between the front roller 104 and the back roller 106. However, in examples, when the lever 114 is switched to the second position such that the tread-based machine 100 is in the second operation mode, the front pole 190B may be extended upwards such that the front roller 104 is elevated, as depicted in Figured 2 and 4. Thus, in examples, the front pole 190B may have a first height during the first operation mode and a second height (e.g., that is greater than the first height) during the second operation mode. In some implementations, the height of the back pole 190A may also be adjusted to facilitate dual modes of operation.
In examples, the tread-based machine 100 also includes a sled post 120 coupled to a front side of the frame 102. For example, the sled post 120 may be proximate to the front roller 104. During the first operation mode (e.g., when the support surface 108 is flat), the user of the tread-based machine 100 may hold on to the sled post 120 to simulate sled training workouts. For example, during the first operation mode, the user may hold on to the sled post 120 and move (e.g., walk or run) on the belt 110. If the user wants to engage in “push” sled training, the user may (1) face the front of the tread-based machine 100, hold on to the sled post 120, and move (e.g., walk or run) in a forward direction.
Alternatively, if the user wants to engage in “pull” sled training, the user may (1) attach a belt to their waist, couple a cable to the belt and to the attachment hook, face the back of the tread-based machine 100, and move in a forward direction. As depicted in FIG. 1 , a sled pull attachment hook 170 may be coupled to the sled post 120. In some embodiments, if the user wants to engage in pull sled training, the user may couple a first end of a cable to the sled pull attachment hook 170 and a second end of the cable to an accessory (e.g., a belt) wrapped around the user. In these embodiments, the user may face the back of the tread-based machine 100 and walk in a forward direction for pull sled training. The “pull” force can be created by the tension in the cable.
In some implementations, a rear attachment hook may be located proximate to a rear of the tread-based machine 100. In these implementations, if the user wants to engage in “pull” sled training, the user may attach a belt to their waist, couple a cable to the belt and to the rear attachment hook, face the front of the tread-based machine 100, and move in a forward direction. Other examples are possible.
During the first operation mode, whether the user is engaging in push sled training or pull sled training, the resistance controller 130 can be configured to adjust an amount of resistance associated with the movement of the belt 110. For example, to increase the resistance (simulating an increase of weight being pushed or pulled during sled training), the user can adjust a setting on the resistance controller 130. Increasing the resistance makes it more difficult to move the belt 110. In examples, the resistance controller 130 can allow a user to control a magnetic powder brake (e.g., via an electrical signal), the magnetic powder brake applying a corresponding resistance to movement of any one of the rollers 104, 106 and the belt 110. Similarly, to decrease the resistance (simulating a decrease of weight being pushed or pulled during sled training), in example, the user can adjust a setting on the resistance controller 130. Decreasing the resistance makes it easier to move the belt 110.
In examples, the tread-based machine 100 also includes at least one performance monitor 180 coupled to the frame 102. In examples, the performance monitor 180 may be configured to display one or more metrics associated with a workout. As non-limiting examples, the one or more metrics may indicate a number of calories burned during the workout, including a simulated distance travelled during the workout, a simulated weight applied to the sled post 120, and/or a resistance or weight applied to the belt, etc. In examples, the simulated weight applied to the sled post 120 may be indicative of a resistance level selected using the resistance controller 130. Furthermore, although performance monitor 180 is illustrated in FIG. 1 as a single monitor, it should be readily apparent that the performance monitor 180 may be implemented as a plurality of monitors (e.g., two monitors), each of which may display similar or different content than one another. Other examples are possible.
In examples, the tread-based machine 100 may also include one or more monitor buttons 182 integrated into a performance monitor and configured to control which metrics are displayed on the performance monitor 180. In some implementations, a monitor may also be displayed proximate to the monitor buttons 182 so that the user can view the metrics when operating the tread-based machine 100 in the second operation mode.
Referring to FIG. 2 , a diagram of the tread-based machine 100 in a treadmill configuration is illustrated, according to an example embodiment. In examples, the tread-based machine 100 may be configurable to transition between (1) a first operation mode for sled training and (2) a second operation mode for traditional treadmill cardiovascular activity. In FIG. 2 , the tread-based machine 100 is illustrated in the second operation mode.
In FIG. 2 , where the tread-based machine 100 is in the second operation mode to support traditional treadmill cardiovascular activity, the support surface 108 and the belt 110 are curved. To transition the tread-based machine 100 from having a support surface 108 that is flat (as depicted in FIG. 1 ) to having a support surface 108 that is curved (as depicted in FIG. 2 ), in examples, the lever 114 is shifted into the second position. In FIG. 1 , where the support surface 108 is in a first position (e.g., during the first operation mode), there is a first height difference between the front roller 104 and the back roller 106. However, as depicted in FIG. 2 , where the support surface 108 is in a second position (e.g., during the second operation mode), there is a second height difference, greater than the first height difference, between the front roller 104 and the back roller 106. In some examples when the support surface 108 is in a second position (e.g., during the second operation mode), there is a second height difference, greater than the first height difference, between the front and back rollers 104, 106 and the frame 102.
To facilitate a support surface 108 that is curved, as depicted in FIG. 2 , at least a portion of the frame 102 may be flexible to enable bending of the support surface 108. In some embodiments, at least a portion of the frame 102 is rigid.
During the second operation mode, in examples, the user may release their hands from posts 172 attached to the guard rails 112A, 112B, and move (e.g., walk or run) on the belt 110. In examples, the resistance associated with movement of the belt 110 may be greatly reduced compared to the resistance during the first operation mode. As a result, during the second operation mode, in examples, the tread-based machine 100 may operate as a self-propelled treadmill. In examples, the belt 110 can circulate in either a first direction (e.g., points along the support surface can be moving generally toward the front roller 104) or a second direction opposite the first direction (e.g., points along the support surface can be moving generally toward the back roller 106) based on a user preference. For example, a user can drive a rotation of the belt 110 in either of the first or second direction by initiating a resistance training routine and manually driving the belt 110 in the desired direction (e.g. with the user's feet). In some cases, a direction of circulation of the belt 110 can be configurable by a user via a control (e.g., a button a lever, a knob, a switch, etc.). In examples, once the belt is circulating in a given direction, measured workout parameters (e.g., calories burned, distance travelled, force exerted, speed, etc.) can be sensed or calculated based on the rotational direction of the belt. In some cases, once the belt 110 is rotating in a selected direction, a rotation in the opposite direction can be prevented (e.g., rollers 104, 106 can be locked against rotation in the opposite direction) until the belt 110 has been stationary for a predetermined period of time (e.g., 10 seconds, 20 seconds, 30 seconds, over 30 seconds, or over 60 seconds).
In some embodiments, the tread-based machine 100 may include a motor that is configured to cause the front roller 104 and the back roller 106 to rotate. In these embodiments, in examples, the tread-based machine 100 may operate as a motorized treadmill during the second operation mode. Furthermore, although not specifically illustrated in FIGS. 1 and 2 , the tread-based machine 100 can be operated in a third operation mode, including wherein the support surface is inclined during the third operation mode (e.g., in combination with either and/or both of the first and second operation modes). Other examples are possible.
Referring to FIG. 3 , a diagram of the tread-based machine 100 with an adjustable sled post is illustrated, according to an example embodiment. In FIG. 3 , the tread-based machine 100 is in the sled training configuration.
As depicted in FIG. 3 , the sled post 120 may include a plurality of distance adjustment openings 304 to accommodate users of varying sizes. To illustrate, the sled post 120 may include distance adjustment openings 304A, distance adjustment openings 304B, and other distance adjustment openings that are not specifically depicted in FIG. 3 . In examples, the tread-based machine 100 also includes a foot pedal 302 coupled to the front side of the frame 102. In examples, depression of the foot pedal 302 may enable the sled post 120 to move closer to the front side of the frame 102 or farther from the front side of the frame 102. For example, to move the sled post 120 relatively close to the frame 102, the user may apply a downward force to the foot pedal 302 and push the sled post 120 closer to the frame 102 until a locking mechanism is inserted into the distance adjustment openings 304B. In examples, to move the sled post 120 further from the frame 102, the user may apply a downward force to the foot pedal 302 and pull the sled post 120 from the frame unit the locking mechanism is inserted into the distance adjustment openings 304A. In some examples, a position of a sled post (e.g., sled post 120) can be variable in a vertical direction (e.g., up or down). Furthermore, in examples, the sled post may be adjustable in relation to one or more surfaces and/or portions of the tread-based machine (e.g., the front, back, and/or one or more sides of the tread-based machine). Other examples are possible.
Referring to FIG. 4 , a diagram of the tread-based machine 100 with the adjustable sled post is illustrated, according to an example embodiment. In FIG. 4 , the tread-based machine 100 is in the treadmill configuration. In the treadmill configuration depicted in FIG. 4 , the user of the tread-based machine 100 may bypass use of the adjustable sled post 120 and may engage in traditional treadmill cardiovascular activity.
Referring to FIG. 5 , a top view of the tread-based machine 100 is illustrated, according to an example embodiment. In examples, the tread-based machine 100 may be configurable to transition between (1) a first operation mode for sled training and (2) a second operation mode for traditional treadmill cardiovascular activity.
In examples, the tread-based machine 100 described with respect to FIGS. 1-5 may resolve the drawbacks associated with traditional sled training. For example, the tread-based machine 100 reduces the need for a significant amount of indoor space and/or output space for sled training. In particular, the tread-based machine 100 may be similar in size to a traditional treadmill, and similar to a treadmill, while the user may be moving along on the belt 110, the tread-based machine 100 remains stationary. Furthermore, the tread-based machine 100 may be stored indoors so that sled training is not subject to inclement weather and/or cold climates.
The resistance controller 130 simplifies the process of creating a desired resistance. Thus, the user may not have to add (or remove) weights to change the resistance. Rather, in examples, the user can change the resistance by adjusting a setting on the resistance controller 130 (e.g., and thereby adjusting a resistance level of a magnetic powder brake), which improves convenience and saves time. In examples, the resistance controller 130 also eliminates friction discrepancies that typically occur when using a sled on different surfaces. Furthermore, because the tread-based machine 100 includes the performance monitor 180 and/or a performance monitor proximate to the monitor buttons 182 to track metrics, such as calories burned, distance travelled, etc., in examples, the tread-based machine 100 reduces the need for the user to have dedicated tools to track different exercise metrics.
FIG. 6 illustrates a flow chart of a method 600, according to an example embodiment.
The method 600 includes building a frame of a tread-based machine, at block 602. The frame includes a front roller, a back roller, and a support surface positioned between the front roller and the back roller. The support surface is flat during a first operation mode for the tread-based machine, and the support surface is curved during a second operation mode for the tread-based machine. In some examples, building a frame can include assembling the tread-based machine 100 described above, and shown in FIGS. 1-5 . In some cases, building a frame can include assembling the tread assembly 700 described below and shown in FIGS. 7-12 . For example, building a frame can include installing the belt frame assembly shown in FIG. 8 between track adjustment mechanisms 704 a, 704 b, and positioning a belt between the track adjustment mechanisms 704 a, 704 b so as to circulate over front wheels 726, rear wheels 728, and rollers 722, 716. In some examples, building a frame can include installing cams within track adjustment mechanisms (e.g., installing cams 734 in track adjustment mechanisms 704 a, 704 b, as shown in FIG. 9 ), and positioning track support members (e.g., lateral rods shown in FIG. 8 ) to be movable vertically in response to a movement of the cams. In some cases, building a frame of a tread-based machine can include any assembly step required to assembly a tread assembly (e.g., the tread assembly 700 shown in FIGS. 7-10B) or a tread-based machine.
The method 600 also includes coupling a sled post to a front side of the frame, at block 604. In some examples, a method does not include coupling a sled post to a frame.
The method 600 also includes integrating a resistance controller onto the tread-based machine, at block 606. The resistance controller is usable to adjust an amount of resistance associated with the movement of the belt. In some examples, a resistance controller can adjust a rotational resistance at front or rear rollers of a tread-based machine. For example, a resistance controller can control a brake that is operably coupled to a front or back roller (e.g., front or back rollers 104, 106 shown in FIGS. 1-4 , front or rear wheels 726, 728 shown in FIGS. 8, 10 a, and 10 b, etc.). In some examples, the resistance controller can be a manual controller. In some examples, a resistance controller (e.g., controller 1206 shown in FIG. 12 ) can be an electrical controller, and can control a brake (e.g., brake 1210 shown in FIG. 12 , a magnetic powder brake, other types of brakes, etc.) via electrical signals to control a resistance of a roller.
The method 600 of building the tread-based machine 100 described with respect to FIG. 6 may resolve the drawbacks associated with traditional sled training. For example, the tread-based machine 100 reduces the need for a significant amount of indoor space and/or output space for sled training. In particular, the tread-based machine 100 may be similar in size to a traditional treadmill, and similar to a treadmill, while the user may be moving along on the belt 110, the tread-based machine 100 remains stationary. Furthermore, the tread-based machine 100 may be stored indoors so that sled training is not subject to inclement weather and/or cold climates.
The resistance controller 130 simplifies the process of creating a desired resistance. Thus, the user may not have to add (or remove) weights to change the resistance. Rather, the user can change the resistance by adjusting a setting on the resistance controller 130, which improves convenience and saves time. The resistance controller 130 also eliminates friction discrepancies that typically occur when using a sled on different surfaces. Furthermore, because the tread-based machine 100 includes the performance monitor 180 to track metrics, such as calories burned, distance travelled, etc., the tread-based machine 100 reduces the need for the user to have dedicated tools to track different exercise metrics.
In some examples, a tread-based machine can include track adjustment mechanisms for changing a shape of a track (e.g., a track including a belt). In some examples, track adjustment mechanisms can selectively alter a height at particular points of a track to achieve a desired surface curvature (e.g., a flat surface, a convex surface, a concave surface, an inclined surface, etc.). FIG. 7 illustrates a tread assembly 700 according to some examples of the present disclosure. The tread assembly 700 can be similar to tread-based machine 100 shown in FIGS. 1-5 . In some examples, the tread assembly 700 can be a tread component of an exercise machine that also includes other features and mechanisms (e.g., an electronic control panel, guard rails, sled posts, etc.). For example, the tread assembly 700 can be a sub-assembly of the tread-based machine 100, as further described below. In some examples, the tread assembly 700 can comprise a standalone exercise machine.
In the illustrated example, the tread assembly 700 includes a base plate 702, two track adjustment assemblies 704 a, 704 b fixed to the base plate 702 (e.g., using fasteners), a belt 706 between the track adjustment assemblies 702 a, 702 b, and a control lever 708. As noted above, in some examples, the tread assembly 700 can be integrated with an exercise machine similar or identical to the tread-based machine 100 shown in FIGS. 1-5 . For example, the track adjustment assemblies 702 a, 702 b can be housed within a housing of the tread-based machine 100 (e.g., the portion of the track-based machine 100 housing the front and back rollers 104, 106) and the belt 706 and control lever 708 can be similar or identical to the belt 110 and lever 114 respectively.
FIG. 7 further illustrates an axis A, an axis B, and an axis C. As shown, each of the axes A, B, and C are orthogonal to the other two of the axes A, B, and C. The axis A is parallel to an elongate direction of the tread assembly 700. When the belt 110 of the tread assembly 700 is in a flat configuration, a top surface of the belt (i.e., the support surface) is parallel to the axis A, and when the belt 110 is circulating, points of the belt at the top surface move in a direction parallel to the axis A. As used below, the term “longitudinal” means a direction parallel to axis A. As further shown, axis B is transverse to axis A and extends in a direction parallel to a width direction of the tread assembly 700. For example, the track adjustment assemblies 704 a, 704 b are spaced apart from each other in a direction parallel to axis B. As used below, the term “lateral” refers to a direction or dimension parallel to axis B. Further, the axis C is orthogonal to axes A and B and is parallel to a direction of gravity. As used herein, the term “vertical” refers to a direction parallel to axis C.
The base plate 702 can be a structural component providing stability and rigidity to the track adjustment assemblies 704 a, 704 b (and thereby the belt 706), and can be designed to prevent displacement of the track adjustment assemblies 704 a, 704 b under a load (e.g., a user performing exercises on the machine 700). In some examples, the base plate 702 can be a hard metal plate, including, for example, a stainless steel. In some examples, a base plate can be a plastic plate, a wood plate, or can be constructed from any known structural materials known in the art. In some examples, a frame can be provided to at least partially enclose the track adjustment assemblies 704 a, 704 b, and the base plate 702 can be connected to the frame. In some examples, an angle of the base plate 702 can be controllable to achieve a desired incline (e.g., angle of elevation) for the belt 706, as can advantageously provide a user with additional customization of an exercise experience. In some examples, a tread assembly does not include a base plate. For example, portions of the tread assembly (e.g., track adjustment assemblies 704 a, 704 b) can be secured to a frame member of a tread-based machine. In some examples, one or more feet can extend downwardly from a frame of a tread-based machine to support the tread-based machine on a floor surface. In some examples, wheels can be provided at a frame member of a tread-based machine to facilitate movement of the tread-based machine.
As described further below, components of the track adjustment assemblies 704 a, 704 b can be adjusted (e.g., manually, electrically, using computerized controls, etc.) to produce a desired surface profile (e.g., shape, curvature, incline, etc.) for the belt 706. In some examples, the belt 706 can be movable between a flat configuration (e.g., the first operational mode, as shown in FIG. 3 ) and a curved configuration (e.g., the second operational mode as shown in FIG. 4 ). For example, as illustrated in FIGS. 7-9 , the control lever 708 can be movable between a first position (e.g., as shown in FIG. 7 ) corresponding to a flat shape for the belt 706, and a second position corresponding to a curved shape for the belt 706. In some examples of the disclosed systems, more than two operational modes and corresponding surface profiles can be defined for a belt of a tread assembly. For example, adjustment mechanisms (e.g., components of the track adjustment assemblies 704 a, 704 b) can be configured to move a belt between more than two configurations. For example, adjustment mechanisms can define a plurality of configurations for a surface of a belt, including any combination of a flat configuration, a convex configuration, a concave configuration, and an inclined configuration (e.g., with one longitudinal end of a belt of a tread-based machine positioned vertically higher than the opposite longitudinal end). In some examples, adjustment mechanisms can move a belt between different degrees of curvature. For example, multiple concave configurations can be defined for a belt, and an adjustment mechanism can be controlled to move the belt to either of a first concave configuration with a corresponding first angle of curvature, or a second concave configuration with a corresponding second angle of curvature. In some examples, configurations of a belt can be preset mechanically or electrically, and the belt can be moved between a plurality of different preset shapes (e.g., different curvatures) that may influence one or more operational parameters of the tread assembly 700 (e.g., tension, resistance, incline, etc.). For example, a lever (e.g., the lever 118, the lever 708) can be movable between two or more pre-defined positions corresponding to two or more respective configurations for the belt. In some examples, a surface profile (e.g., a curvature, shape, etc.) of a track (e.g., the belt 706) can be adjusted along a continuous range of options (e.g., without preset configurations) according to a user's desired track shape or track curvature. In some examples, an angle of the track adjustment mechanisms 704 a, 704 b (e.g., an angle defined along a plane normal to the lateral axis) can be adjusted, as can advantageously allow for control of an incline of the support surface. In some cases, an incline of a support surface can be controlled via components of track adjustment assemblies (e.g., cams 734). Other examples are possible.
In examples, a profile of a track can be at least partially defined by a skeletal structure (e.g., an articulable frame). In examples, a skeletal structure can include links and joints, and the links can be movable about the joints to define one or more possible configurations for the skeletal structure. In some examples of the disclosed exercise machines, a skeletal structure can underlie a support surface of a track and can both provide structural support to the support surface and at least partially define a profile of the support surface.
For example, FIG. 8 is an exploded view of the tread assembly 700, illustrating, inter alia, a belt frame assembly 710 (e.g., a skeletal structure). As shown, the belt frame assembly 710 includes a plurality of lateral rods 712, a plurality of linkages 714 extending between consecutive lateral rods 712, a plurality of rollers 716, and spacers 718. Each of the plurality of lateral rods 712 can extend laterally between the track adjustment assemblies 704 a, 704 b. In some examples, as further described below, distal ends of lateral rods 712 can be received through slots 720 (e.g., linear slots, curved slots, circular holes, etc.) defined in the track adjustment assemblies 704 a, 704 b. The apertures can limit a movement of the lateral rods 712 and can define a range of possible positions for one or more lateral rods 712 of the plurality of lateral rods 712. In the illustrated example, the belt frame assembly 710 includes eight lateral rods 712. In other examples, a belt frame assembly can have fewer than eight lateral rods, or more than eight lateral rods. For example, in some examples, a number of lateral rods can correspond to a length of a tread-based machine, with longer tread-based machines requiring more lateral rods for support of the support surface of a track, and shorter tread-based machines requiring fewer lateral rods. In some examples, a number of lateral rods can be increased or decreased based on a desired customization of a profile for a track. For example, providing more lateral rods can provide a higher degree of control for a profile of a track.
As noted above, consecutive lateral rods can be connected by linkages. In some examples, linkages can be rotatable about a lateral rod to which the linkage is connected (e.g., the lateral rods can define “joints” of a belt frame assembly). Thus, a lateral rod can rotate about a consecutive lateral rod to which it is joined by a linkage, and the linkage can at least partially define a radius about which the consecutive lateral rods can rotate relative to each other (e.g., can define a space between the consecutive lateral rods). Returning to FIG. 8 , the linkages 714 can extend between the consecutive lateral rods 712 in a direction of movement of the belt (e.g., transverse to the lateral direction). In the illustrated example, each of the lateral rods 712 is joined to a consecutive lateral rod 712 with two linkages 714 positioned at opposite lateral sides of the lateral rods 712. As shown, the linkages 714 can be arranged in longitudinal rows 715 a, 715 b, the longitudinal rows 715 a, 715 b positioned at opposite lateral sides of the lateral rods 712, as can advantageously increase a stability and rigidity of the belt frame assembly 710. In the illustrated example, the linkages are substantially similar (e.g., identical), and each of the linkages 714 is the same length as the other linkages 714. In some examples, linkages can be of different lengths. For example, in some examples, it can be advantageous for some consecutive lateral rods to be positioned closer together than others, as can provide more granular control for a curvature of a track at specific locations along the track. In some examples, a single row of linkages can be provided linking the lateral rods, or more than two rows of linkages. For example, a row of linkages can be provided laterally centrally along the belt frame assembly, alternatively or in addition to rows of linkages at lateral sides of the belt frame assembly. In some examples, linkages can be at least partially flexible and can allow for variation in a distance between consecutive lateral bars.
A skeletal support structure (e.g., the belt frame assembly 710) can include friction-reducing elements to facilitate a movement of a belt relative to the skeletal support structure. Friction-reducing elements can be positioned at points of contact with the belt and can at least partially define a support surface of the belt. In the illustrated example, the belt frame assembly includes a plurality of rollers 716. The rollers 716 are oriented to rotate about respective rotational axes that are parallel to the lateral direction, as can reduce a friction between the belt 706 and the belt frame assembly 710 in the direction of travel of the belt 706. In some examples, the rollers 716 can include bearings as can reduce a rotational friction of the rollers. A surface of the rollers 716 can extend vertically above surrounding portions of the belt frame assembly 710 so that, in operation, the belt 706 (e.g., slats of the belt 706) contacts the rollers 716 without contacting other surfaces of the belt frame assembly. The rollers 716 can collectively at least partially define a support surface for the belt 706. For example, when a maximally vertical surface of each of the rollers 716 is aligned with the maximally vertical surfaces of the other rollers 716, the rollers 716 can collectively define a flat (e.g., planar) support surface for the belt 706. In the illustrated example, a subset of the rollers 716 are secured to the linkages 714, and a subset of the rollers 716 are secured to the lateral rods 712, and two rows of rollers 716 are provided at opposite lateral sides of the belt frame assembly. In some examples, friction-reducing elements of a belt frame assembly can comprise fixed components (e.g., non-rotatable elements) with surfaces having a low coefficient of friction relative to the belt 706. In some examples, lateral rods of a belt frame assembly can be rotatable and friction reducing elements can comprise radial extensions that are rotationally fixed to the lateral rods.
As further shown in FIG. 8 , the belt frame assembly 710 includes spacers 718. The spacers 718 can comprise tubes (e.g., plastic tubes, polyvinyl chloride tubes, metal tubes, etc.) encasing portions of corresponding lateral rods 712. The spacers 718 can at least partially enforce a lateral distance between the linkages 714 (e.g., between the longitudinal rows 715 a, 715 b of linkages) on opposing lateral sides of the belt frame assembly 710. In some examples, a belt frame assembly does not include spacers. In some examples, a lateral position of a row of linkages can be fixed using clamps, fasteners, or locating features defined on lateral rods.
In some examples, an exercise machine (e.g., an exercise machine including the tread assembly 700) can include fixed rollers that are positioned to engage a perimeter of the belt to further reduce a friction about a perimeter around which the belt circulates. For example, as shown in FIG. 8 , the track adjustment assemblies 704 a, 704 b include rollers 722 that extend from inner walls 724 a, 724 b of the respective track adjustment assemblies 704 a, 704 b. The rollers 722 can comprise bearings and can engage a side of the belt opposite the support surface (e.g., positioned vertically below the support surface, and moving in a longitudinal direction opposite the longitudinal direction in which the support surface moves).
Further, rotatable elements can be provided to define a curvature for a front portion of a belt and a rear portion of a belt. An exercise machine can include rollers (e.g., rollers 104, 106) that can comprise rotatable elements at a front and rear of a belt. In some examples, rollers can include a drum extending from one lateral side of an exercise machine to another lateral side or can include one or more wheels. As shown, the tread assembly 700 further includes front wheels 726 and rear wheels 728. The front wheels 726 can be aligned along a lateral axis and the belt 706 can extend at least partially around the front wheels, with a rotation of the front wheel corresponding to a rotation of the belt 706 (e.g., a rotation of the belt 706 producing a rotation of the front wheels 726, or a rotation of the front wheel 726 producing a rotation of the belt 706). Similarly, the rear wheels 728 can be aligned along a lateral axis and the belt 706 can extend at least partially around the rear wheels 728, with a rotation of the rear wheels 728 corresponding to a rotation of the belt 706. In some examples, rear or front cylinders (e.g., front roller 104, back roller 106) can extend laterally between track adjustment assemblies (e.g., assemblies 704 a, 704 b) and can support and correspond to a rotation of a belt (e.g., alternatively or in addition to front wheels 726 and rear wheels 728).
With reference to FIGS. 10 a and 10 b , the front and rear wheels 726, 728 for a track adjustment assembly 704 can have respective centers that can be aligned with each other along an axis that is parallel to the longitudinal axis A. The center of the rear wheel 728 can be positioned along a vertical axis D (e.g., an axis parallel to the axis C), and the center of the front wheel 726 can be positioned along a vertical axis E. In some examples, a diameter of front wheels of a tread assembly can be different than a diameter of rear wheels of the tread assembly. In some examples, wheels can be operatively connected to a drive element (e.g., a motor) and the drive element can induce a rotation of the wheel, and thus the belt. In some examples, a wheel (e.g., one or both of a front wheel and a rear wheel) can be operably connected to a resistance element (e.g., a magnetic powder brake) as can facilitate resistance training.
In the illustrated examples, the front wheels 726 and the rear wheels 728 are fastened to the inner walls 724 a, 724 b. As shown, the front wheels 726 and rear wheels 728 are positionally fixed in a vertical and longitudinal direction. In the illustrated example, centers of the front wheels 726 and rear wheels 728 are aligned in a longitudinal direction (e.g., positioned at the same vertical height relative to the base plate 702). Further, as shown, a longitudinal distance A between centers of the front wheels 726 and the rear wheels 728 is fixed. In the illustrated example, the longitudinal distance A is about 650 mm. In some examples, one or both of front and rear wheels of a tread assembly can be movable in a vertical or longitudinal direction. For example, a wall of a track adjustment assembly can define a wheel position slot for a wheel, and an axle for the wheel can be moved along the wheel position slot to define a position of a center of the wheel. In some examples, for example, a front wheel can be displaceable in a vertical direction (e.g., via electronic, manual, or computerized controls), and displacement of the front wheel can at least partially define a slope or angle of curvature of a track of the tread assembly. In some examples, one or both of the front and rear wheels can be displaced in a longitudinal direction. For example, the front wheel can be displaced in a direction closer to the rear wheel to reduce a tension in the belt and allow for a curvature of a support surface. Similarly, the front wheel can be displaced in a direction away from the rear wheel to increase a tension of the belt (e.g., to achieve a flat configuration for the support surface).
In some examples, a tread assembly can include tensioning components to selectively increase or decrease a tension of a belt at desired locations. For example, FIG. 8 further illustrates tensioner 730. The tensioner 730 includes a movable arm and a roller, the roller configured to engage a surface of the belt 706 when the tensioner is in a tension configuration (e.g., when the belt 706 is in a flat configuration, as shown in FIG. 10 b ). In some examples, the arm of the tensioner 730 can be movable between a loose configuration in which the roller of the tensioner 730 does not contact the belt and the tension configuration. In some examples, the arm of the tensioner 730 can extend radially from and be rotatable about an axle that is coaxial with the corresponding front or rear wheel 726,728. In some examples, tensioners can be provided for only front wheels of a tread assembly, or only rear wheels. In some examples, a tensioner can be movable between more than two positions, and a degree of tension can be controlled (e.g., manually, electrically, or via computerized systems) by movement of the tensioner between the more than two positions. In the example shown, the position of the tensioners 730 (e.g., the angular position of the tensioners 730 relative to the centers of the corresponding wheels 726, 728) is controlled through movement of the control lever 708.
According to some examples of the present disclosure, track adjustment assemblies can include mechanical components (e.g., cams) for translating a rotational motion to a vertical displacement of portions of a track to achieve a desired curvature for the track. In the following description, reference will be made to a track adjustment assembly 704. Description of the track adjustment assembly 704 is equally applicable to track adjustment assemblies 704 a, 704 b unless otherwise noted. With continued reference to FIG. 8 , the track adjustment assembly 704 includes an exterior wall 732 that is laterally spaced apart from the interior wall 724. The interior wall 724 can be secured to the exterior walls 732 (e.g., with bolts, screws, or other fasteners), and spacers can be provided between them to define a distance between the walls 724, 732. An internal space can be defined between the interior wall 724 and the exterior wall 732, and mechanical elements of the track adjustment assembly 704 configured to adjust a shape of the belt 706 can be positioned within the internal space. For example, as shown in FIG. 8 , a plurality of cams 734 can be positioned in the internal space, and movement of the plurality of cams 734 can produce movement of corresponding ones of the lateral rods 712, and thereby, a profile of the support surface of the belt 706.
As noted above, according to some examples of the present disclosure, a curvature of a track can be determined through the selective variable control of vertical heights along a longitudinal dimension of a track (e.g., a selective vertical displacement of all or a subset of the lateral rods 712 shown in FIG. 8 ). A track adjustment assembly can include features allowing or restricting a motion of lateral rods of a belt frame assembly to at least partially define possible curvatures of a track.
In this regard, FIG. 9 illustrates a side elevation view of the track adjustment assembly 704, with the exterior wall 732 shown transparently to show the internal mechanical elements. As shown, the walls 724, 732 define a plurality of vertical slots 720 a, 720 b, 720 c, 720 d, 720 e, 720 f. The slots 720 a, 720 b, 720 c, 720 d, 720 e, 720 f are sized to receive respective lateral rods 712, and define a range of possible vertical positions for the corresponding lateral rods 712. For example, as shown, the slots 720 a, 720 f are longer in the vertical direction than slots 720 b, 720 e, and therefore define a broader range of possible vertical positions of the lateral rods 712. Similarly, slots 720 b, 720 e are longer in the vertical direction than slots 720 c, 720 d. In the illustrated example, then, the track adjustment assembly 704 provides greater vertical variability for the belt 110 at longitudinal ends of the belt 110 than in a center of the belt 110. In other examples, guide slots for lateral rods of a belt frame assembly can be of equal length, or can be longer in a center than at longitudinal extremities. Further, in some examples, slots can be provided at only one longitudinal side of a track adjustment assembly, and a track adjustment assembly (e.g., and a corresponding curvature of a track) need not be symmetrical along the longitudinal direction.
In some examples, a position of one or more lateral rods of a belt frame assembly can be fixed in the vertical direction. For example, as shown, the exterior and interior walls 732, 724 further include apertures 721, which, as shown, define a fixed position of the lateral rods 712 received through the apertures 721. Thus, as shown, a height of a longitudinal center of the support surface (e.g., a top surface of the belt 110) is not variable. In some examples, apertures can fix vertical positions of lateral rods at longitudinal extremities of a track, and vertical positions of lateral rods at a longitudinal center can be variable to achieve desired curvatures for the track. In other configuration, slots and fixed-position apertures can be arranged in any desired order and spacing (e.g., along a longitudinal direction) to facilitate a desired variability of a profile of the track.
In the illustrated example, the track adjustment assembly 704 includes six cams 734 a, 734 b, 734 c, 734 d, 734 e, 734 f spaced apart along a longitudinal direction. In the following description, discussion of a generic cam 734 is applicable to each of the cams 734 a, 734 b, 734 c, 734 d, 734 e, 734 f, and numbering excluding the alphabetic designation of a specific cam should be understood as applicable to all cams. The cams 734 are configured to pivot about axles 738, the axles 738 defining rotational axes parallel to the lateral direction. In some examples, the axles 738 comprise rods (e.g., pins, bolts, etc.) extending through each of the external wall 234, the internal wall 724, and the corresponding cam 734. Further, in the illustrated example, the axles 738 a, 738 b, 738 c, 738 d, 738 e, 738 f are aligned along the longitudinal direction (e.g., an axis parallel to axis A extends through each of the axles 738 a, 738 b, 738 c, 738 d, 738 e, 738 f).
As shown, the control lever 708 is rotationally coupled to the cam 734 a, with a movement of the control lever (e.g., a rotation about a lateral axis) producing a corresponding rotation of the cam 734 a about the axle 738 a. In the illustrated example, both of the control lever 708 and the cam 734 a rotate about the same lateral axis. The rotational movement of the control lever 708 is transferred to the cam 734 a via a hexagonal rod 709 (shown in FIG. 8 ) that extends through both of the cam 734 a and the control lever 708. As shown in FIG. 8 , the hexagonal rod 709 extends laterally from the track adjustment assembly 704 a to the track adjustment assembly 704 b, and a movement of the control lever 708 produces a rotation of cams 734 in both of the track adjustment assemblies 704 a, 704 b. In some examples, rotation of cams in one track adjustment assembly is independent of rotation of cams in another track adjustment assembly, as can allow independent adjustment of heights on lateral sides of a track (e.g., to produce a banked support surface).
In some examples, cams of a track adjustment assembly can be rotationally coupled to other cams of the track adjustment assembly (e.g., a rotation of one cam can produce a corresponding rotation of another cam). For example, as further shown in FIG. 9 , the track adjustment assembly further includes a lever bar 736. The lever bar 736 is pivotably coupled to each of the cams 734 a, 734 b, 734 c, 734 d, 734 e, 734 f via respective pins 740 a, 740 b, 740 c, 740 d, 740 e, 740 f. As shown, then, a movement of the lever bar 736 in a longitudinal direction (i.e., a direction parallel to axis A) exerts a moment on each of the cams 734 via the pins 740 and produces a corresponding rotation of the cams 734 about their respective axles 738. As shown from the perspective of FIG. 9 , then, a clock-wise rotation of the control lever 708 about the axle 738 a produces a corresponding clock-wise rotation of the cam 734 a about the axle 738 a (e.g., via the hexagonal rod 709) and as the cam 734 a rotates, a force is exerted on the lever bar 736 via the pin 740 a in a longitudinal direction (i.e., in a leftward direction as seen from the perspective of FIG. 9 ). The lever bar 736 moves in a longitudinal direction in response to the force exerted at pin 740 and causes a corresponding rotation of the other cams 734 about their respective axles 738 in the clockwise direction. In some examples, a single lever rod rotationally couples each cam within a track adjustment assembly (e.g., as shown in FIG. 9 ). In other examples, multiple lever bars can be provided to rotationally couple subsets of a total number of cams within a track adjustment assembly. For example, a track adjustment mechanism can include six cams, with a first subset of three cams rotationally coupled via a first lever bar, and a second subset of three cams rotationally coupled via a second lever bar, as can allow for independent control of the first subset of three cams and the second subset of three cams. In some examples, cams can be rotationally coupled through other structures, including, for example, via belts, chains, cords, hydraulic assemblies, etc. Further, in some examples, a rotational coupling can be implemented through electromechanical systems. For example, rotation of individual cams can be produced by dedicated motors (e.g., servo motors) for the cams, and a controller of a tread assembly can operate the motors to produce a similar rotation of each of the cams.
As further shown in FIG. 9 , the cams 734 each include a curved surface 742. The curved surface 742, as illustrated, includes a portion that faces in an upward direction (e.g., a tangent of a point along the curved surface 742 is parallel to the axis A). The curved surface 742 at least partially defines a curved slot in the cam 734. As illustrated, at least a portion of the curved slot aligns with a corresponding portion of the slot 720 (e.g., the portion of the curved slot is aligned with the corresponding portion of the slot 720 about a lateral axis). In operation, a distal end of the lateral rods 712 are received through both of the corresponding slot 720 and curved slot (e.g., the curved slot at least partially defined by the curved surface 742). When received through the slot 720 and the curved slot, the lateral rod 712 is supported on the curved surface, and a rotation of the cam 734 produces a rotation of the curved surface 742 and thereby alters a vertical height of the lateral rod 712 within the slot 720. In other examples, other mechanisms can be used for altering a height of one or more lateral rods, including for example, rack and pinion systems, linear actuators, pulley systems, or any known mechanism for providing a linear displacement of a lateral rod in a vertical direction. In some examples, cams of a track adjustment assembly can include features for increasing a stability (e.g., reducing a vibration) of lateral rods that are received at the cams. For example, a curved surface can include a deformable material (e.g., a rubber) that can increase a friction between the lateral rod and the curved surface and also oppose longitudinal displacement of the rod by deforming locally. In examples, a curved surface can include ridges that can define predefined positions for the lateral rods, and the lateral rods can be received in valley portion of the curved surface between the ridges.
FIG. 10 a illustrates a cross-section of the tread assembly 700, showing the support surface of the belt 706 in a curved configuration. As shown, in the curved configuration, the distally located lateral rods 712 a, 712 f are positioned at a vertical top of the respective slots 720 a, 720 f. The vertical positions of the lateral rods 712 a, 712 f define a maximum vertical position of the belt 110. The lateral rods 712 b, 712 e spaced adjacent to the lateral rods 712 a, 712 f (e.g., in a direction toward a longitudinal center of the track adjustment assembly 704) are positioned vertically lower than the lateral rods 712 a, 712 f, defining a curvature of the belt along the portion of the belt 110 longitudinally between the lateral rods 712 a and 712 b, and between the lateral rods 712 f and 712 e. Similarly, lateral rods 712 d, 712 c are positioned vertically lower than the lateral rods 712 b, 712 e. And, as shown, the lateral rods 712 g, 712 h are positioned vertically lower than the lateral rods 712 c, 712 d. In the illustrated example, therefore, the heights of the lateral rods 712 a-712 h collectively define a concave curved support for the belt 706, and thus a curved support surface of the belt 706. Further, in the illustrated example, a height difference in the vertical direction between the between the longitudinally distal lateral rods 712 a, 712 f and the longitudinally central lateral rods 712 g, 712 h (e.g., a height difference between a center of the lateral rods 712 a, 712 f and a center of the rods 712 g, 712 h) is about 20 mm. In some examples, longitudinally distal lateral rods can define a maximal height of a belt frame assembly (and thus the support surface), and longitudinally central rods can define a minimal height of the belt frame assembly, and a difference between the maximal height and the minimal height (e.g., in the vertical direction) can be up to 30 mm, or up to 40 mm.
FIG. 10 b illustrates a support surface of the tread assembly 700 illustrated in FIG. 10 a , except in a flat configuration. As shown, in the flat configuration, each of the lateral rods 712 a-712 h are positioned at the same vertical height, and a longitudinal axis extends through a center of each of the rods 712 a-712 h. In some examples, in the flat configuration, each lateral rod 712 is positioned at a minimum vertical position (e.g., a vertical position closest to a floor) along the respective slot 720 or aperture 721. In the illustrated example, when the belt 110 is in the flat configuration, a maximum vertical height of each of the rollers 716 is aligned at the same vertical height.
In some examples, tension can be selectively applied to an underside of a belt for a tread assembly to assist in providing a desired shape and tension of the belt. For example, both of FIGS. 10 a and 10 b illustrate an underside 750 of the belt 706. The underside 750 can be defined as the portion of the belt positions vertically lower than the front and rear wheels 726, 728, and extending between the axis D and the axis E (e.g., longitudinally between the center of the front wheel 726 and the rear wheel 728). FIGS. 10 a and 10 b further illustrate the tensioners 730, which include rollers 731 (e.g., roller bearings) at a distal end. The tensioners 730 can be configured to move between a loose position, as shown in FIG. 10 a , and a tension position, as shown in FIG. 10 b . In the loose position, the roller 731 of the tensioner 730 is at a first vertical position. In some examples, as shown, when the roller 731 is at the first vertical position, the underside 750 is flat (e.g., extends in a direction parallel to the longitudinal direction). When the tensioner is in the tension position, as shown in FIG. 10 b , the roller 731 can be positioned at a second vertical position, lower than the first vertical position (e.g., closer to a floor). When in the second vertical position, the roller 731 produces a displacement of the belt 706 where the roller 731 contacts the belt 706. As shown, in this configuration, the underside 750 is not flat, and the rollers 731 and 722 collectively define a path for the underside 750 of the belt 706 between the axes D and E that includes a greater length of the belt than the straight-line length of the underside 750 shown in FIG. 10 a . In this way, the tensioner 730 can be configured to remove a slack from the belt 706 when the belt 706 is in the flat configuration. In the illustrated example, a height of the roller 731 can be changed through a rotation of the tensioner 730 about a lateral axis. In other examples, a vertical position of a roller can be otherwise controlled to achieve a desired tension. For example, a roller for a tensioner can be displaced in a linear direction (e.g., using linear actuator, rack and pinion mechanism, lead screws, etc.) to displace a portion of belt. Further, in some examples, cams can be used to apply a tension at an underside of a belt. In still further examples, positions of either or both of front and rear rollers can be varied to achieve desired tension characteristics of a belt. For example, a distance between front and rear rollers can be increased to increase a tension along a belt, and decreased to allow for a curved support surface.
FIG. 11 is a perspective view of the track adjustment assembly 704. As shown in FIG. 11 , a longitudinal axis F can intersect a minimum of each of the slots 720 a-f and the apertures 721. Thus, in the illustrated example, the track of the tread assembly 700 is in the flat configuration when each of the lateral rods (e.g., lateral rods 712 shown in FIGS. 8, 10 a, 10 b) are at the vertically minimum position defined by the respective slots 720 a-720 f and aperture 721. In other examples, a flat configuration can be achieved when lateral rods of a belt frame assembly are positioned at vertical centers of the corresponding slots and apertures, or at a vertical maximum of corresponding slots and apertures.
FIG. 12 illustrates a control system 1200 for a tread-based machine (e.g., the tread-based machine 100 shown in FIGS. 1-5 , a tread-based machine including the tread assembly 700 shown in FIGS. 7-11 , etc.). In the illustrated example, the control system 12200 can be configured to control rotational characteristics of a roller 1202 (e.g., any of rollers 104, 106 shown in FIGS. 1-4 , front and rear wheels 726, 728 shown in FIGS. 8-11 , etc.). In some examples, the control system 1200 can allow a user to control a resistance of the roller 1202, and thus of a belt of a tread-based machine. In some examples, the control system 1200 can allow a user to control a drive speed of the roller 1202.
As illustrated, the control system 1200 further includes electrical controls 1204, a controller 1206, and a brake 1210. In some examples, the electrical controls 1204 can include buttons, knobs, switches, touchscreen controls, or any combination of these. The electrical controls 1204 can receive an input from a user indicating a desired operating mode for the tread-based machine. For example, in some embodiments a user can engage the electrical controls 1204 to select one of (1) a first operation mode for sled training and (2) a second operation mode for traditional treadmill cardiovascular activity. Further, in some examples, the electrical controls 1204 can allow a user to select a desired resistance of the roller (e.g., when the tread-based machine is operated in the first operation mode) or desired speed for the roller 1202 (e.g., when the tread-based machine is operated in the second operation mode). The user input at the electrical controls 1204 can be provided to the controller 1206 via an electrical signal.
In some examples, the controller 1206 can comprise control devices such as an automation device, a special purpose or general-purpose computer including various computer hardware, software, firmware, and so on, consistent with the discussion below. As specific examples, the controller 1206 can include a processor, a microcontroller, a field-programmable gate array, a programmable logic controller, logic gates etc., and other typical components that are known in the art for implementation of appropriate functionality (e.g., memory, communication systems, power sources, user interfaces and other inputs, etc.).
In some examples, a control system for a tread-based machine can include a motor 1208. As shown, the motor 1208 can be operably coupled to the controller 1206 and mechanically connected to the roller 1202 (e.g., via a gear box, a shaft, a belt drive, etc.). In an example, when the tread-based machine is in an operating mode corresponding to conventional treadmill workouts, the controller 1206 can provide one or more instructions (e.g., signals) to the motor 1208 to drive the motor, and thus, to drive the roller 1202.
In some examples, a controllable resistance element (e.g., a brake) can be provided to set a desired resistance for a tread of a tread-based machine. For example, as shown, the brake 1210 can be operably connected to the controller 1206 (e.g., in electrical communication with the controller 1206) and mechanically connected to the roller 1202. The brake 1210 can provide a resistance to rotation of the roller 1202 (e.g., when the tread-based machine is operated in the first operation mode) in response to an instruction from the controller 1206. In some examples, the brake 1210 can comprise a magnetic powder brake. In some examples, a magnetic powder brake of a tread-based machine can be a 100 Nm brake. In some examples, a magnetic powder brake of a tread-based machine can be a brake that is between 25 Nm and 100 Nm. In some examples, a magnetic powder brake can provide up to 500 lbs. of resistance. The resistance level of a magnetic powder brake can be configured by a user and can be adjusted via electrical signals from a controller to the brake. In some examples, other brake mechanisms can be used to generate a resistance for a tread-based machine. For example, in some examples, a brake (e.g., the brake 1210) can comprise an eddy brake, an electromagnetic brake, a hysteresis brake, or a mechanical brake.
In some examples, a control system for a tread-based machine can facilitate control of a track adjustment assembly to control a physical profile (e.g., a curvature, an incline, a bank, etc.) of a track. For example, as further shown in FIG. 12 , the control system further includes a track adjustment system 1212. The track adjustment system can comprise either or both of mechanical and electrical components for controlling a curvature of a track. For example, in some examples, a track adjustment system can include the track adjustment assemblies 704 a, 704 and belt frame assembly 710 shown in FIG. 8 . As shown, a manual control 1214 can be provided to control a configuration (e.g., a curvature) of a track. The manual control can include a lever (e.g., the lever 114 shown in FIGS. 1-5 , the lever 708 shown in FIGS. 7-9 , etc.) that can be moved to move the track between a flat configuration and a curved configuration. In some examples, a track adjustment system can be electrically controlled. For example, as shown, the track adjustment system 1212 can be in electrical communication with the controller 1206, and the controller 1206 can provide instructions to electrical components of the track adjustment system 1212 to place the track in the desired configuration (e.g., in response to a user input at the electrical controls 1204). Other examples are possible.
In some examples, an operation of a tread-based machine (e.g., a resistance level of a magnetic powder brake) can be controlled in part based on sensed parameters of the machine. For example, as further shown in FIG. 12 , the control system 1200 can further include a tension sensor 1216 and a track configuration sensor 1218. The tension sensor 1216 can sense a tension at one or more points along a belt (e.g., belt 110 shown in FIGS. 1-5 , belt 706 shown in FIGS. 7, 8, 10 a, and 10 b). The tension sensor 1216 can send the tension measurements to the controller 1206, and the controller can adjust a resistance of the brake 1210 based on the tension measurement (e.g., the resistance can be lowered if a tension is above a first threshold value or can be increased if the tension is below a second threshold value). In some examples, the tension sensor 1216 can include a rotary encoder. Further, the track configuration sensor 1218 can provide a signal to the controller 1206 indicative of the configuration of the track. In some examples, the track configuration sensor 1218 can be a switch (e.g., a limit switch, a reed switch, a hell sensor, etc.) that can sense a position of at least a component of a tread assembly. For example, when the track configuration sensor provides an indication to the controller 1206 that the tread in in a flat configuration, the controller 1206 can allow for an adjustment of resistance in response to user input at the controls 1204. When the track configuration sensor sends the controller 1206 an indication that the tread is in the curved state the controller 1206 can disengage the resistance engine.
As used herein, a system, apparatus, structure, article, element, component, or hardware “configured to” perform a specified function is indeed capable of performing the specified function without any alteration, rather than merely having potential to perform the specified function after further modification. In other words, the system, apparatus, structure, article, element, component, or hardware “configured to” perform a specified function is specifically selected, created, implemented, utilized, programmed, and/or designed for the purpose of performing the specified function. As used herein, “configured to” denotes existing characteristics of a system, apparatus, structure, article, element, component, or hardware which enable the system, apparatus, structure, article, element, component, or hardware to perform the specified function without further modification. For purposes of this disclosure, a system, apparatus, structure, article, element, component, or hardware described as being “configured to” perform a particular function may additionally or alternatively be described as being “adapted to” and/or as being “operative to” perform that function.
The flow chart diagrams included herein are generally set forth as logical flow chart diagrams. As such, the depicted order and labeled steps are indicative of one embodiment of the presented method. Other steps and methods may be conceived that are equivalent in function, logic, or effect to one or more steps, or portions thereof, of the illustrated method. Additionally, the format and symbols employed are provided to explain the logical steps of the method and are understood not to limit the scope of the method. Although various arrow types and line types may be employed in the flow chart diagrams, they are understood not to limit the scope of the corresponding method. Indeed, some arrows or other connectors may be used to indicate only the logical flow of the method. For instance, an arrow may indicate a waiting or monitoring period of unspecified duration between enumerated steps of the depicted method. Additionally, the order in which a particular method occurs may or may not strictly adhere to the order of the corresponding steps shown.
Unless otherwise indicated, the terms “first,” “second,” etc. are used herein merely as labels, and are not intended to impose ordinal, positional, or hierarchical requirements on the items to which these terms refer. Moreover, reference to, e.g., a “second” item does not require or preclude the existence of, e.g., a “first” or lower-numbered item, and/or, e.g., a “third” or higher-numbered item.
While the systems and methods of operation have been described with reference to certain examples, it will be understood by those skilled in the art that various changes can be made and equivalents can be substituted without departing from the scope of the claims. Therefore, it is intended that the present methods and systems not be limited to the particular examples disclosed, but that the disclosed methods and systems include all embodiments falling within the scope of the appended claims.

Claims

1. A tread-based machine comprising:

a frame comprising:

a front roller;

a back roller; and

a support surface positioned between the front roller and the back roller, wherein the support surface is flat during a first operation mode for the tread-based machine, and wherein the support surface is curved during a second operation mode for the tread-based machine; and

a belt wrapped around at least a portion of the front roller and at least a portion of the back roller such that movement of the belt causes rotation of the front roller and the back roller.

2. The tread-based machine of claim 1, further comprising a lever coupled to the frame, wherein the lever is configured to transition the tread-based machine between the first operation mode and the second operation mode.

3. The tread-based machine of claim 1, wherein there is a first height difference between the front roller and the back roller during the first operation mode, and wherein there is a second height difference, greater than the first height difference, between the front roller and the back roller during the second operation mode.

4. The tread-based machine of claim 1, further comprising a sled post coupled to a front side of the frame, wherein the front roller is proximate to the front side of the frame.

5. The tread-based machine of claim 4, wherein a distance between the sled post and at least one portion of the frame is adjustable.

6. The tread-based machine of claim 4, further comprising a foot pedal coupled to the front side of the frame, wherein depression of the foot pedal moves the sled post closer to the front side of the frame or farther from the front side of the frame.

7. The tread-based machine of claim 4, further comprising a sled pull attachment hook coupled to the sled post.

8. The tread-based machine of claim 1, further comprising a resistance controller that is configured to adjust an amount of resistance associated with the movement of the belt.

9. The tread-based machine of claim 1, wherein the belt comprises anti-slip treads.

10. The tread-based machine of claim 1, further comprising:

a back pole coupled to a bottom side of the frame and proximate to the back roller; and

a front pole coupled to the bottom side of the frame and proximate to the front roller, wherein the front pole has a first height during the first operation mode and a second height, that is greater than the first height, during the second operation mode.

11. The tread-based machine of claim 1, further comprising a performance monitor coupled to the frame, wherein the performance monitor is configured to display one or more metrics associated with a workout.

12. The tread-based machine of claim 11, wherein the one or more metrics indicate one or more of the following: (i) number of calories burned; (ii) a simulated distance travelled; (iii) a simulated weight applied to belt; (iv) power output; and (v) acceleration.

13. The tread-based machine of claim 11, further comprising one or more monitor buttons integrated into the performance monitor and configured to control which metrics of the one or more metrics are displayed on the performance monitor.

14. The tread-based machine of claim 1, further comprising:

a left guard rail coupled to a left side of the frame; and

a right guard rail coupled to a right side of the frame.

15. The tread-based machine of claim 1, further comprising a third operation mode, wherein the support surface is inclined during the third operation mode for the tread-based machine.

16. The tread-based machine of claim 1, wherein at least a portion of the frame is flexible.

17. The tread-based machine of claim 1, wherein at least a portion of the frame is rigid.

18. A method of building a tread-based machine, the method comprising:

building a frame of the tread-based machine, wherein the frame comprises a front roller, a back roller, and a support surface positioned between the front roller and the back roller, wherein the support surface is flat during a first operation mode for the tread-based machine, and wherein the support surface is curved during a second operation mode for the tread-based machine; and

placing a belt around at least a portion of the front roller and at least a portion of the back roller such that movement of the belt causes rotation of the front roller and the back roller.

19. The method of claim 18, further comprising coupling a sled post to a front side of the frame.

20. The method of claim 18, further comprising integrating a resistance controller onto the tread-based machine, wherein the resistance controller is usable to adjust an amount of resistance associated with the movement of the belt.