CN211918926U - Mechanism is trampled to straight line with on-off pawl - Google Patents

Abstract

The utility model relates to a linear stepping mechanism with a switch-type ratchet, comprising: a power output piece, a ratchet wheel, a transmission wheel, a ratchet piece frame, a ratchet piece, a stepping piece, a transmission piece or a transmission piece and a pull rod. The transmission assembly, the ratchet is sleeved on the power output member and is fixedly connected with the power output member, the ratchet member frame is fixedly connected or integrally formed with the transmission wheel, and the ratchet member frame is sleeved on the ratchet wheel and is connected with the power output member. The ratchet is connected with relative rotation, the ratchet member is mounted on the ratchet member frame and can swing relative to the ratchet member frame, the transmission member drives the transmission wheel to rotate, and the ratchet member includes a mounting portion, a ratchet member and a ratchet member. The pawl part is engaged with the ratchet wheel, and the transmission part or the pull rod touches the contact part of the pawl part during the wheel reversal process, so that the pawl part of the pawl part is disengaged from the ratchet wheel, so that the The bike can go backwards freely without being limited by the backward distance.

Description

A linear pedaling mechanism with a switch-type pawl

【Technical field】

The utility model relates to the field of bicycles, in particular to a linear pedaling mechanism with a switch-type pawl.

【Background technique】

Most of the bicycle driving mechanisms in the prior art adopt the way of circular pedaling, which has a dead point of force, that is, when the pedaling force direction is in a straight line with the crank, no matter how much force is used, the bicycle cannot be moved forward. For circular motion, the pedaling frequency is not high. Therefore, in order to solve this technical problem, the industry has developed a straight-line pedaling bicycle. Please refer to Chinese Patent No. 201810728921.8, which discloses a straight-line pedaling bicycle, which includes: a front guide wheel, a rear A transmission wheel, a slider mechanism, a transmission belt, a tensioning mechanism and a pedaling member, the pedaling member is fixedly connected with the slider mechanism, the transmission belt is wound around the front guide wheel and the rear transmission wheel, and the slider mechanism includes a slider and a The guide rail, the head end and the tail end of the transmission belt are respectively connected with the slider, the defect of this kind of straight pedal bicycle is: when the bicycle wheel goes backwards, the wheel drives the rear transmission wheel and the transmission belt to rotate counterclockwise, and the transmission belt rotates in the reverse direction. During the rotation of the hour hand, the slider is driven to move on the guide rail. Since the length of the guide rail is limited, the distance that the bicycle can go backwards is also limited. Once the slider slides to the edge of the guide rail, the bicycle can no longer go backwards. This problem is a common problem in the straight-line pedaling bicycles in the prior art. Even if the slider mechanism is not applied to the straight-line pedaling bicycles, the bicycle can only be reversed for a limited distance due to the length limit of the transmission belt. However, in practical applications In general, it is generally required that a straight-line pedaling bicycle can go backwards more freely like a circular pedaling bicycle, and is not limited by the backward distance.

Therefore, it is necessary to provide a linear pedaling mechanism with a switch-type pawl that solves the above-mentioned technical problems.

【Content of utility model】

In order to solve the above-mentioned problems, the purpose of the present invention is to provide a linear pedaling mechanism with a switch-type pawl that can freely reverse the bicycle.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a linear stepping mechanism with a switch-type pawl, comprising: a power output member, a ratchet wheel, a transmission wheel, a ratchet member frame, a ratchet member, a stepping member, A transmission member or a transmission assembly composed of a transmission member and a pull rod, the ratchet wheel is sleeved on the power output member and is fixedly connected with the power output member, and the ratchet member frame is fixedly connected or integrally formed with the transmission wheel. The pawl member is set on the ratchet wheel and forms a relative rotational connection with the ratchet wheel. The ratchet member is mounted on the ratchet member frame and can swing relative to the ratchet member frame. The ratchet member is controlled by an elastic member. In the initial position, the transmission member drives the transmission wheel to rotate, the pawl member includes a mounting part, a pawl part and a contact part, the pawl part is engaged with the ratchet wheel, and the transmission part or the pull rod is in the process of the wheel reversing. The contact portion of the pawl member is actuated to disengage the pawl portion of the pawl member from the ratchet wheel.

Preferably, the linear pedaling mechanism with switch-type pawls in the present invention is further configured as follows: the pawl member frame is provided with an opening matched with the contact portion of the pawl member, and the contact portion penetrates Passing through the opening on the ratchet member frame and protruding out of the ratchet member frame or the contact portion is accommodated in the opening, when the contact portion is accommodated in the opening, the ratchet member frame is provided with an intermediate trigger and An elastic piece for controlling the initial position of the middle trigger.

Preferably, the linear pedaling mechanism with a switch-type pawl in the present invention is further configured as follows: the linear pedaling mechanism further includes a guide wheel, the transmission member is a belt or a rope, and the transmission wheel is a pulley Or rope pulley, the pulley or rope pulley is provided with a first guide groove and a second guide groove, the first guide groove and the second guide groove are arranged at intervals, and one end of the power section of the belt or rope is wound On the first guide groove and its free end is fixedly connected with the pulley or rope pulley, one end of the passive section of the belt or rope is wound on the second guide groove and its free end is fixedly connected with the pulley or rope pulley, so The other end of the power section of the belt or rope is fixedly connected to the pedaling member, and the other end of the passive section of the belt or rope is fixedly or elastically connected to the pedaling member around the guide wheel.

Preferably, the linear pedaling mechanism with a switch-type pawl in the present invention is further configured as follows: the transmission member is a belt or a rope, the transmission wheel is a pulley or a rope pulley, and the pulley or rope The wheel is provided with a first guide groove and a second guide groove, the first guide groove and the second guide groove are arranged at intervals, and one end of the power segment of the belt or rope is wound on the first guide groove and its free end Fixed connection with the pulley or rope pulley, one end of the passive section of the belt or rope is wound on the second guide groove and its free end is fixedly connected with the pulley or rope pulley, the other end of the power section of the belt or rope It is fixedly connected with one end of the pull rod, the other end of the passive section of the belt or rope is fixedly or elastically connected with the other end of the pull rod, and the pedal is connected with the pull rod to be relatively rotatable.

Preferably, the linear pedaling mechanism with a switch-type pawl in the present invention is further configured as follows: the first guide groove and the second guide groove are both arranged in a spiral shape.

Preferably, the linear pedaling mechanism with a switch-type pawl in the present invention is further configured as follows: the transmission member is a chain, the transmission wheel is a sprocket, and the power end of the chain is fixed to one end of the pull rod connected, the passive end of the chain bypasses the transmission wheel and the guide wheel and is elastically connected with the other end of the pull rod, and the pedal member and the pull rod form a relatively rotatable connection.

Preferably, the linear pedaling mechanism with switch-type pawls in the present invention is further configured as follows: the transmission member is a chain, the transmission wheel is a sprocket, and the power end of the chain is fixedly connected to the pedaling member , the passive end of the chain bypasses the guide wheel and the transmission wheel and is fixedly or elastically connected with the pedal.

Preferably, the linear pedaling mechanism with switch-type pawls in the present invention is further configured as follows: a contact portion with a pawl piece or a touch portion matched with an intermediate touch piece is provided on the tie rod or chain .

Preferably, the linear pedaling mechanism with switch-type pawls in the present invention is further configured as follows: the chain is provided with a contact portion with the pawl piece or a touch portion matched with the middle touch piece.

Preferably, the linear pedaling mechanism with a switch-type pawl in the present invention is further configured as follows: the touching portion is arranged in an arc shape.

Compared with the prior art, the present invention has the following beneficial effects: the present invention sets a contact portion on the pawl member, so that the transmission member or the pull rod touches the contact portion of the pawl member during the transmission process, so that the pawl The pawl part of the component is disengaged from the ratchet wheel, so that the bicycle can freely reverse without being restricted by the reverse distance.

【Description of drawings】

FIG. 1 is a schematic structural diagram of a linear pedaling mechanism in Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of a partially exploded structure of the linear pedaling mechanism in Embodiment 1 of the present invention.

FIG. 3 is a schematic sectional view of the structure along the line A-A shown in FIG. 1 .

FIG. 4 is a schematic cross-sectional structural diagram taken along the line B-B shown in FIG. 1 .

FIG. 5 is a schematic structural diagram of the linear pedaling mechanism in Embodiment 2 of the present invention.

FIG. 6 is a schematic structural diagram of the linear pedaling mechanism in Embodiment 3 of the present invention.

FIG. 7 is a partial structural schematic diagram of the linear pedaling mechanism in Embodiment 3 of the present invention.

FIG. 8 is a partial exploded structural diagram of the linear pedaling mechanism in Embodiment 3 of the present invention.

FIG. 9 is a schematic cross-sectional structural diagram of a pawl member and a ratchet wheel in Embodiment 3 of the present invention.

FIG. 10 is a schematic structural diagram of the linear pedaling mechanism in Embodiment 4 of the present invention.

11 is a schematic structural diagram of the linear pedaling mechanism in Embodiment 5 of the present invention.

In Figures 1 to 11: 1. Power output member, 2. Ratchet, 20, Bearing, 3. Transmission wheel, 30, First guide groove, 31, Second guide groove, 4. Pawl frame, 40, Opening , 41, middle actuating part, 42, elastic part, 5, pawl part, 50, mounting part, 51, pawl part, 52, contact part, 53, pin, 6, pedal part, 7, guide wheel, 70, Spring, 8, transmission part, 80, power section, 81, passive section, 82, power end, 83, passive end, 9, tie rod, 90, touch part.

【Detailed ways】

The linear pedaling mechanism with a switch-type pawl according to the present invention will be further described in detail below through specific embodiments.

Example 1

Referring to Figures 1 to 4, a linear pedaling mechanism with a switch-type pawl includes: a power output member 1, a ratchet wheel 2, a transmission wheel 3, a pawl member frame 4, a pawl member 5, a pedal member 6. Guide wheel 7 and transmission member 8. In this embodiment, the power output member 1 is a transmission shaft, and the ratchet wheel 2 is sleeved on the transmission shaft and is fixedly connected with the transmission shaft. Of course, in other embodiments, the power output member 1 can also be The input part of the transmission, the ratchet 2 is fixedly connected with the input part of the transmission, and the transmission drives the transmission shaft or the drum to rotate, and the utility model can also be realized.

The ratchet member frame 4 is fixedly connected or integrally formed with the transmission wheel 3. The ratchet member frame 4 is sleeved on the ratchet wheel 2 and forms a relative rotational connection with the ratchet wheel 2. In this embodiment, the ratchet member frame A bearing 20 is provided between the frame 4 and the ratchet 2 to achieve relative rotational connection. The ratchet member 5 includes a mounting portion 50 , a ratchet portion 51 and a contact portion 52 . The mounting portion 50 of the ratchet member 5 and the ratchet member frame 4 are provided with pin holes, and the pin 53 passes through the pin holes so that the The ratchet member 5 is installed on the ratchet member frame 4 and the ratchet member 5 can swing relative to the ratchet member frame 4. The ratchet portion 51 is engaged with the ratchet 2, and the ratchet member frame 4 There is an opening 40 which is matched with the contact portion 52 , and the contact portion 52 of the ratchet member 5 passes through the opening 40 on the ratchet member frame 4 and protrudes out of the ratchet member frame 4 .

The transmission member 8 drives the transmission wheel 3 to rotate. In this embodiment, the transmission member 8 is a rope, and the transmission wheel 3 is a rope pulley. Of course, in other embodiments, the transmission member 8 can also be In order to be a belt, the transmission wheel 3 can also be a pulley, which can also realize the present invention. The rope pulley is provided with a first guide groove 30 and a second guide groove 31 , and the first guide groove 30 and the second guide groove 31 are arranged in a spiral shape and are spaced apart by a certain distance. One end of the power segment 80 of the rope is wound on the first guide groove 30 and its free end is fixedly connected to the sheave, and one end of the passive segment 81 of the rope is wound on the second guide groove 31 and its free end is connected to the rope. The wheel is fixedly connected, the other end of the power section 80 of the rope is fixedly connected to the pedal 6, and the other end of the passive section 81 of the rope bypasses the guide wheel 7 and is elastically connected to the pedal 6 through a spring 70 or directly. It is fixedly connected to the pedal 6 .

The working principle of the linear pedaling mechanism in this embodiment is: when riding forward, the pedaling member 6 is moved forward, the pedaling member 6 pulls the rope, and the power section 80 of the rope pulls the sheave to run forward. The pulley 5 is engaged with the ratchet wheel 2, and the ratchet wheel 2 is fixedly connected with the drive shaft, so the drive shaft is driven to run. At this time, the power section 80 of the rope is released, and the passive section 81 of the rope is wound on the second guide groove 31 of the pulley. When the pedaling member 6 moves forward to a certain position, the pedaling member 6 is stepped back, and the passive section 81 of the rope is pulled during the process of stepping back on the pedaling member 6, and the rope drives the rope pulley to rotate in the reverse direction. There is a ratchet 2 and a pawl 5 between them, so the reverse rotation of the sheave will not drive the drive shaft to reversely rotate (that is, when the pedal 6 is stepped back, the wheel will not fall back). , the passive section 81 of the rope is released, and the power section 80 of the rope is wound on the first guide groove 30 of the sheave. When the pedal 6 is stepped back to a certain position, it will be stepped forward again, and the bicycle will be pedaled in a straight line. Ride before. When the bicycle needs to move backwards, the wheel drives the drive shaft to rotate in reverse, so that the power section 80 of the rope is continuously wound on the first guide groove 30 of the rope wheel. During the winding process of the rope, the power section of the rope simultaneously drives the pedal When the pedal member moves back to the limit, the rope will touch the contact portion 52 of the pawl member 5, so that the contact portion 52 moves in the direction close to the center of the circle. 52 and the pawl portion 51 are opposite ends of the mounting portion 50 as the swing center, so the movement of the contact portion 52 in the direction close to the center of the circle will make the pawl portion 51 move in the direction away from the center of the circle, so that the pawl portion 51 and the The ratchet 2 is disengaged, and the drive shaft can rotate freely relative to the sheave, so the wheels can freely reverse without being restricted by the reversing distance.

Example 2

Please refer to FIG. 5 , the rest of the structure of the linear pedaling mechanism in this embodiment is the same as that of the first embodiment, the difference is that: the linear pedaling mechanism in the first embodiment is provided with a guide wheel 7 without a tie rod, while this embodiment The linear pedaling mechanism in the device is provided with a pull rod 9 and the guide wheel 7 is removed. The pull rod 9 and the rope together form a transmission assembly, the power section 80 of the rope is fixedly connected with one end of the pull rod 9, and the passive section 81 of the rope is connected with the pull rod. The other end of 9 is fixedly connected or elastically connected. In Example 1, the rope is fixedly installed on the pedal member 6, while in this embodiment, the pull rod 9 is installed on the pedal member 6 and forms a relatively rotatable connection with the pull rod 9.

Example 3

Please refer to FIGS. 6 to 9 , a linear pedaling mechanism with a switch-type pawl, comprising: a power output (not shown), a ratchet 2, a transmission wheel 3, a pawl frame 4, a pawl 5, The pedal member 6, the guide wheel 7, the transmission member 8 and the pull rod 9, the transmission member 8 and the pull rod 9 together form a transmission assembly. In this embodiment, the power output member is a transmission shaft, and the ratchet wheel 2 is sleeved on the transmission shaft and is fixedly connected with the transmission shaft. Of course, in other embodiments, the power output member can also be a transmission and a transmission shaft. The transmission shaft, the ratchet wheel 2 is fixedly connected with the transmission, and the transmission drives the transmission shaft to rotate, and the utility model can also be realized.

The ratchet member frame 4 is fixedly connected or integrally formed with the transmission wheel 3, the ratchet member frame 4 is sleeved on the ratchet wheel 2 and forms a relative rotational connection with the ratchet wheel 2, and the ratchet member 5 includes a mounting portion 50, The pawl part 51 and the contact part 52, the mounting part 50 of the pawl part 5 and the pawl part frame 4 are provided with pin holes, the pins pass through the pin holes to install the pawl part 5 on the pawl part frame 4 The ratchet member 5 can swing relative to the ratchet member frame 4, the ratchet portion 51 is engaged with the ratchet wheel 2, and the ratchet member frame 4 is provided with an opening 40 which is matched with the contact portion 52. , the contact portion 52 of the ratchet member 5 passes through the opening 40 on the ratchet member frame 4 and protrudes out of the ratchet member frame 4 .

The transmission member 8 drives the transmission wheel 3 to rotate. In this embodiment, the transmission member 8 is a chain, the transmission wheel 3 is a sprocket, and the power end 82 of the chain is fixedly connected to one end of the pull rod 9, so The passive end 83 of the chain goes around the sprocket and the guide wheel 7 and is elastically connected with the other end of the pull rod 9 , and the pedal member 6 and the pull rod 9 are connected in a relatively rotatable manner. The draw rod 9 is provided with a touch portion 90 which is matched with the contact portion 52 of the pawl member 5, and the touch portion 90 is arranged in an arc shape, which can better ensure that the draw rod 9 can touch during the movement. It hits the contact portion 52 of the pawl member 5 . Of course, in other embodiments, the touch portion 90 may not be provided on the pull rod 9, but may be provided on the chain, which can also implement the present invention.

The working principle of the linear pedaling mechanism in this embodiment is: when riding forward, the pedaling member 6 is moved forward, the pedaling member 6 pulls the chain, and the power end 82 of the chain pulls the sprocket to run forward. The ratchet wheel 2 is engaged with the ratchet wheel 2, and the ratchet wheel 2 is fixedly connected with the transmission shaft, so the transmission shaft is driven to run. During the process, the passive end 83 of the chain is pulled, and the chain drives the sprocket to rotate in the reverse direction. Since the ratchet 2 and the pawl 5 are provided between the sprocket and the transmission shaft, the reverse operation of the sprocket will not drive the transmission shaft to reverse. To run (that is, when the pedal 6 is stepped back, the wheel will not fall back), when the pedal 6 is stepped back to a certain position, pedal forward again, so as to cycle back and forth to realize the straight-line pedal bicycle riding forward . When the bicycle needs to move backwards, the wheels drive the drive shaft to rotate in the reverse direction, thereby driving the pull rod 9 to move to the left continuously. During the movement, the power end of the chain drives the pedal to move back at the same time. When the pedal moves back When approaching the limit, the contact portion 90 on the pull rod 9 touches the contact portion 52 of the pawl member 5, so that the contact portion 52 moves in the direction close to the center of the circle, and the pawl portion 51 moves in the direction away from the center of the circle. When the pawl portion 51 and the ratchet wheel 2 are disengaged, the transmission shaft can freely rotate relative to the sprocket, so the wheels can freely reverse without being restricted by the reversing distance.

Example 4

Referring to FIG. 10 , the rest of the structures in this embodiment are the same as those in Embodiment 3, the difference is that a pull rod is provided in Embodiment 3, while no pull rod is provided in this embodiment. The power end 82 is fixedly connected to the pedal 6, the passive segment 83 of the chain bypasses the guide wheel 7 and the transmission wheel 3 and is fixedly or elastically connected to the pedal 6, and the chain is provided with a contact portion with the pawl. Matching touch parts.

Example 5

In Embodiments 1 to 4, the contact portion 52 of the ratchet member 5 passes through the opening 40 on the ratchet member frame 4 and protrudes out of the ratchet member frame 4, and the rope, chain or pull rod directly touches the contact portion. 52, please refer to FIG. 11, and in this embodiment, the contact portion 52 of the pawl member 5 is located in the opening 40 on the pawl member frame 4, and the middle trigger member 41 and The elastic member 42 for controlling the initial position of the middle trigger member 41 , a rope, a chain or a pull rod directly contacts the middle trigger member 41 , and the middle trigger member 41 moves into the opening 40 and touches the contact portion 52 of the pawl member 5 .

To sum up, in the present invention, a contact portion is arranged on the ratchet member, so that the transmission member or the pull rod touches the contact portion of the ratchet member during the transmission process, so that the ratchet portion of the ratchet member is disengaged from the ratchet wheel. In turn, the bicycle can freely reverse without being limited by the reverse distance.

The above-mentioned embodiments are only illustrative of the principles and effects created by the present utility model, as well as some of the applied embodiments, but are not intended to limit the present utility model; it should be pointed out that for those of ordinary skill in the art, without departing from the Under the premise of the inventive concept of the present invention, several deformations and improvements can be made, which all belong to the protection scope of the present invention.

Claims (10)

1. A linear pedaling mechanism with a switch-type pawl, comprising: a power output, a ratchet, a transmission wheel, a pawl frame, a pawl, a pedal, a transmission or a transmission composed of a transmission and a pull rod assembly, the ratchet is sleeved on the power output member and is fixedly connected with the power output member, the ratchet member frame is fixedly connected or integrally formed with the transmission wheel, and the ratchet member frame is sleeved on the ratchet wheel and formed with the ratchet wheel Relatively rotating connection, the ratchet member is mounted on the ratchet member frame and can swing relative to the ratchet member frame, the ratchet member controls its initial position through the elastic member, and the transmission member drives the transmission wheel to rotate, It is characterized in that: the ratchet member includes a mounting portion, a ratchet portion and a contact portion, the ratchet portion is engaged with the ratchet wheel, and the transmission member or the pull rod touches the contact portion of the ratchet member during the inversion of the wheel, thereby The pawl portion of the pawl member is disengaged from the ratchet wheel. 2 . The linear pedaling mechanism with an on-off pawl as claimed in claim 1 , wherein the pawl frame is provided with an opening matched with the contact portion of the pawl, and the contact The contact portion passes through the opening on the ratchet member frame and protrudes out of the ratchet member frame or the contact portion is accommodated in the opening. When the contact portion is accommodated in the opening, an intermediate trigger is provided on the ratchet member frame. A piece and an elastic piece for controlling the initial position of the middle trigger. 3 . The linear pedaling mechanism with a switch-type pawl according to claim 2 , wherein the linear pedaling mechanism further comprises a guide wheel, the transmission member is a belt or a rope, and the transmission wheel is 3 . A pulley or rope pulley, the pulley or rope pulley is provided with a first guide groove and a second guide groove, the first guide groove and the second guide groove are arranged at intervals, and the power section of the belt or rope is One end is wound on the first guide groove and its free end is fixedly connected with the pulley or rope pulley, and one end of the passive segment of the belt or rope is wound on the second guide groove and its free end is fixedly connected with the pulley or rope pulley The other end of the power section of the belt or rope is fixedly connected with the pedal, and the other end of the passive section of the belt or rope bypasses the guide wheel and is fixedly or elastically connected to the pedal. 4. The linear pedaling mechanism with a switch-type pawl according to claim 2, wherein the transmission member is a belt or a rope, the transmission wheel is a pulley or a rope pulley, and the pulley Or the sheave is provided with a first guide groove and a second guide groove, the first guide groove and the second guide groove are arranged at intervals, and one end of the power section of the belt or rope is wound on the first guide groove and its The free end is fixedly connected with the pulley or the rope pulley, one end of the passive section of the belt or rope is wound on the second guide groove and the free end is fixedly connected with the pulley or rope pulley, the power section of the belt or rope is fixedly connected. The other end is fixedly connected with one end of the pull rod, the other end of the passive section of the belt or rope is fixedly or elastically connected with the other end of the pull rod, and the pedal member and the pull rod form a relatively rotatable connection. 5 . The linear pedaling mechanism with an on-off pawl according to claim 3 or 4 , wherein the first guide groove and the second guide groove are arranged in a spiral shape. 6 . 6 . The linear pedaling mechanism with a switch-type pawl according to claim 2 , wherein the transmission member is a chain, the transmission wheel is a sprocket, and the power end of the chain is connected to the tie rod. 7 . One end is fixedly connected, the passive end of the chain bypasses the transmission wheel and the guide wheel and is elastically connected with the other end of the pull rod, and the pedal member and the pull rod form a relatively rotatable connection. 7 . The linear pedaling mechanism with an on-off pawl according to claim 2 , wherein the transmission member is a chain, the transmission wheel is a sprocket, and the power end of the chain is connected to the pedaling member. 8 . Fixed connection, the passive end of the chain bypasses the guide wheel and the transmission wheel and is fixedly or elastically connected with the pedal. 8 . The linear pedaling mechanism with switch-type pawls as claimed in claim 6 , wherein the tie rod or the chain is provided with a contact portion with the pawl member or a contact with the middle trigger member. 9 . touch the department. 9 . The linear pedaling mechanism with an on-off pawl as claimed in claim 7 , wherein the chain is provided with a contact portion with the pawl member or a contact portion matched with the middle trigger member. 10 . . 10 . The linear pedaling mechanism with a switch-type pawl according to claim 8 or 9 , wherein the touching portion is arranged in an arc shape. 11 .

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