WO2019113790A1 - Auxiliary tractor and device comprising same - Google Patents

Abstract

Provided are an auxiliary tractor and device comprising same, the auxiliary tractor comprises: a connecting base (10) mounted to an external device to undergo traction (100) and detachably connected to the device to undergo traction (100); a connector (20), one end of which is detachably connected to the connecting base (10); a traveling wheel set (30) mounted on the other end of the connector (20), a plurality of rollers (31) are distributed along the circumferential direction of the rim of the traveling wheel set (30), and the traveling wheel set (30) is laterally rotatable. The auxiliary tractor is placed on shopping cart, wheelchair, and flat cart, which reduces the turning radius during steering, and facilitates users or operators to control with less effort.

Description

Assisted tractor and device comprising the same Technical field

The present application relates to the field of electronic and mechanical technologies, and in particular, to a power assisted retractor and a device including the same.

Background technique

For people who need to take a wheelchair for surgery and accidents, wheelchairs are an important tool for rehabilitation. Wheelchairs are not only a means of transport for physically handicapped and people with reduced mobility, but more importantly, they are able to use wheelchairs for their bodies. Exercise and participate in social activities.

In the existing electric wheelchair, compared with the conventional wheelchair, the electric wheelchair merely adds an intelligent steering controller, and the electric wheelchair has a complicated structure and is troublesome to install.

When the electric wheelchair and the conventional wheelchair are steered, the rotation of the wheelset cannot be laterally restricted, resulting in an increase in the turning radius of the wheelchair, which increases the difficulty of operation. In particular, it is more difficult to turn the wheelchair when steering in a narrow place indoors or in a train. The same problem exists with both the flatbed cart and the shopping cart when turning.

Summary of the invention

The purpose of the present application is to provide a power assisting retractor and a device including the same. The present invention conveniently and simply installs an auxiliary power device on a shopping cart, a wheelchair, and a flatbed cart, and reduces turning during steering. The radius makes it easy for the user or operator to control and save effort.

In order to solve the above problems, a first aspect of the present application provides a power assistor comprising:

The connecting seat is mounted to the external device to be towed and is detachable from the device to be towed Unloading connection

a connector, one end of which is detachably connected to the connector;

The traveling wheel set is mounted on the other end of the connector, and a plurality of rollers are distributed along the circumferential direction of the rim of the traveling wheel, and the traveling wheel set is laterally rotatable.

Further, the traveling wheel set includes two traveling wheels of the same diameter, and a plurality of rollers are distributed along the circumferential direction of the rim of each traveling wheel.

Further, the connecting base includes a connecting rod and a mating portion detachably connected to the connecting rod.

Further, the connecting rod includes a fixed connecting rod fixedly disposed on the mating portion and two movable connecting rods movably mounted at two ends of the fixed connecting rod, and the two movable connecting rods can be elongated away from the ends of the fixed connecting rod, After the movable connecting rod is extended to a predetermined length, it can be engaged with the screw or the protrusion on the device to be towed.

Further, the side of the mating portion opposite to the connecting rod is provided with two mounting holes, each of which is provided with a locking piece, and the upper end of the mating portion is provided with an unlocking button, and the unlocking button is used for controlling The upper and lower movements of the two locking pieces control the coupling or separation of the connecting seat and the connector.

Further, the connector is two links, and the outer surface of the end of each of the links connected to the connector forms an annular groove that cooperates with the locking tab.

Further, the method further includes: a main assembly that surrounds the connector, the main assembly includes a motor that drives the rotation of the traveling wheel set, and the main assembly is provided with a power switch that controls the starting or closing of the motor, and adjusts the traveling speed of the traveling wheel set. Select switch, charging interface, battery indicator for displaying the current battery level, and handle.

In accordance with another aspect of the present application, a shopping cart incorporating the above described power assisted retractor is provided, the shopping cart being a shopping cart having a shopping basket, two rear wheels, and two front wheels.

According to still another aspect of the present application, there is provided a booster tractor comprising the above Wheelchair, which is a wheelchair with two rear wheels and one seat.

According to another aspect of the present application, a flatbed cart including the above-described assisted retractor is provided, the flatbed cart having two rear wheels, two front wheels, and one rack.

The above technical solution of the present application has the following beneficial technical effects:

First, since the auxiliary power unit is used for a single power device on a shopping cart, a wheelchair, and a flat cart, it has a positive triangular position relationship with a main wheel on a shopping cart, a wheelchair, and a flat cart, and is combined by a plurality of rollers when cornering. Under the action of the traveling wheel set, it can smoothly turn and minimize the turning radius, so that the shopping cart, the wheelchair and the flat cart can turn or turn the head in a relatively narrow passage.

Secondly, the convenient and quick connection structure has a double crescent-shaped locking piece in the connecting seat, which can reliably and securely lock the connector on the main assembly, or can be quickly separated from the main body by pressing the unlock button.

DRAWINGS

Figure 1 is a schematic structural view of the assisted retractor;

Figure 2A is a side view of the unassembled completion of the assisted retractor;

2B is a top view of the unassembled completion of the booster tractor;

2C is a front view of the unassembled completion of the assisted retractor;

3A and 3B are schematic views of a shopping cart including the assisted retractor;

3C, 3D are schematic views of a wheelchair containing the assisted retractor;

3E, 3F are schematic views of a flatbed cart containing the booster.

Detailed ways

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the specific embodiments and with reference to the accompanying drawings. It is to be understood that the description is only illustrative, and is not intended to limit the scope of the application. In addition, In the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present application.

Referring to Figures 1, 2A, 2B and 2C, the assisted retractor comprises:

The connector 10 is for mounting to the external device 100 to be towed and is detachably coupled to the device to be towed 100. The to-be-tracted device 100 may be a shopping cart, a wheelchair, a flatbed cart, etc., and may be other devices to be towed that need to be boosted.

Referring to Figures 1, 2A, 2B and 2C, the connector 10 includes a connecting rod 11 and a mating portion 12 detachably coupled to the connecting rod 11. The detachable connection may be a bolted connection or a snap connection or a hinge connection.

As shown in FIG. 1 , 2A , 2B and 2C , the connecting rod 11 includes a fixed connecting rod 111 fixedly disposed on the mating portion 12 and two movable connecting rods 112 movably mounted at two ends of the fixed connecting rod 111 , the fixed connection The rod 111 is detachably mounted on the mating portion 12 for connecting the connecting base 10 and the movable connecting rod 112. Here, the detachable connection may be a bolt connection, a snap connection or a hinge connection. The two movable connecting rods 112 can respectively elongate in a direction away from both ends of the fixed connecting rod 111, and the movable connecting rod 112 can be engaged or sleeved with the screws or protrusions on the device to be towed 100 after being extended to a predetermined length. Preferably, the first end of the movable connecting rod 112 forms a connecting sleeve for enclosing or clamping the screw head or protrusion that can be used for fixing on the device to be towed 100, the first end is the movable connecting rod 112 and the device to be towed The end of the screw or protrusion connected. The length of the movable connecting rod 112 can be freely selected and set according to the user's own needs.

As shown in FIG. 1 , 2A , 2B and 2C , two mounting holes 121 are disposed on a side of the mating portion 12 opposite to the connecting rod 11 , and a locking piece 122 is disposed in each mounting hole 121 . The upper end of the mating portion 12 is provided with an unlocking button 123 for controlling the up and down movement of the two locking pieces 122, thereby controlling the connecting seat 10 and the connection. The bonding or separation of the device 20. The unlock button 123 is provided for conveniently releasing the connection with the main assembly 40. The user presses the unlock button 123 and holds the handle to force the entire main assembly 40 to be withdrawn. When the user presses the unlock button 123, the two locking pieces are interlocked and moved downward synchronously. At this time, the user can easily withdraw the main assembly 40 by holding the handle. When it is necessary to insert the connector 20 of the main body assembly 40 into the mounting hole 121, the user presses the unlocking button 123, and then the connector 20 of the main body assembly 40 is aligned with the mounting hole 121 and inserted into the mounting hole 121 to release the unlocking. The button 123, at this time, the two locking pieces are interlocked, and at the same time acts to catch the connector 20 of the main body assembly 40.

The connector 20 is mounted on the front end of the main assembly 40, and one end thereof is detachably connected to the connecting base 10. Specifically, the connector 20 is two rods 20 disposed at the same height and arranged in parallel. The outer surface of the first end of each of the links 20 forms an annular groove 21 that cooperates with the locking piece 122. The end of the end forms a tapered portion 22 that facilitates access to the mounting hole 121, where the first end is the end to which the connecting rod 20 is coupled to the connecting base 10. The connector 20 is used to quickly and reliably connect the connector 10 to the main assembly 40.

The traveling wheel set 30 is mounted on the rear end of the main assembly 40 and is assembled by components such as a motor, a motor bracket, and a plurality of rollers. The traveling direction and the offset can be changed at multiple angles and in all directions during the traveling. The traveling wheel set 30 is mounted on the other end of the connector 20, and a plurality of rollers 31 are distributed along the circumferential direction of the rim of the traveling wheel set 30, and the traveling wheel set 30 is laterally rotatable. The traveling wheel set 30 includes two traveling wheels of the same diameter, and a plurality of rollers 31 are uniformly distributed along the circumferential direction of the rim of each traveling wheel, so that movements such as forward, traverse, oblique, rotation, and combinations thereof can be realized. the way.

In one embodiment, the booster tractor further includes a main assembly 40 that is wrapped around the outside of the connector 20. The main assembly 40 includes a motor that drives the rotation of the traveling wheel set 30. The main assembly 40 is provided with a main unit 40 for turning the main unit 40 on or off. A power switch 41 that controls the speed at which the motor is turned on or off, and a speed selector switch that adjusts the traveling speed of the traveling wheel set 30 42. A charging interface 43 for replenishing the internal battery of the main assembly 40 after being connected to the charger, a power display 44 for displaying the current battery power, and a handle 45. The handle 45 is disposed on the upper part of the main body for grasping and carrying. The main assembly 40 is a main bracket and a casing of the entire product, and the internal device has main components such as an electronic control system, a battery pack, a motor 30, and the like. The main assembly 40 is coupled to the connector 20 and the connector 20 mounted on the front end of the main assembly 40. Become a complete work portfolio.

Referring to Figures 3A and 3B, in a practical application, a shopping cart including the power assisting retractor, the shopping cart is a shopping cart containing a shopping basket, two rear wheels and two front wheels, the assisting traction The device can be fixed between the two rear wheels.

Referring to Figures 3C and 3D, in a practical application, a wheelchair containing the assisted retractor is a wheelchair having two rear wheels and one seat, and the assisted retractor is fixedly disposed on the two rear wheels. In this way, even in indoors or in train compartments or other narrow spaces, steering can be performed and the turning radius is greatly reduced, which greatly reduces the control complexity of the wheelchair.

Referring to FIGS. 3E and 3F, the present application further provides a flatbed cart including the assisted tractor, which comprises two rear wheels, two front wheels and a shelf, and the power assisted tractor is fixed. Set between the two front wheels.

The present application is intended to protect a power assisted retractor and a device including the same. In the shopping cart, wheelchair, and flatbed cart, the present invention conveniently and simply installs an auxiliary power unit, reducing the turning radius during steering. To make it easy for users or operators to control and save effort.

The above-described embodiments of the present application are to be construed as merely illustrative or not restrictive. Therefore, any modifications, equivalent substitutions, improvements, etc., which are made without departing from the spirit and scope of the application, are intended to be included within the scope of the present application. Furthermore, the scope of the appended claims is intended to cover the scope and All changes and modifications within the equivalents of the boundaries.

Claims (10)

A power assisted tractor, comprising: a connecting seat mounted to the external device to be towed and detachably connected to the device to be towed; a connector, one end of which is detachably connected to the connector; A traveling wheel set is mounted on the other end of the connector, and a plurality of rollers are distributed along a circumferential direction of the rim of the traveling wheel set, and the traveling wheel set is laterally rotatable. The assisted retractor according to claim 1, wherein said traveling wheel set includes two traveling wheels of the same diameter, and a plurality of rollers are distributed along a circumferential direction of a rim of each of said traveling wheels. The power assisted retractor according to claim 1, wherein the connecting base includes a connecting rod and a mating portion detachably coupled to the connecting rod. The power assisted retractor according to claim 3, wherein the connecting rod comprises a fixed connecting rod fixedly disposed on the mating portion and two movable connecting rods movably mounted at two ends of the fixed connecting rod, The two movable connecting rods can be elongated away from the ends of the fixed connecting rod, and the movable connecting rod can be engaged with the screws or protrusions on the device to be towed after being extended to a predetermined length. The power assisted retractor according to claim 3, wherein the side of the mating portion opposite to the connecting rod is provided with two mounting holes, and each of the mounting holes is provided with a lock The buckle is provided with an unlocking button for controlling the up and down movement of the two locking pieces, thereby controlling the coupling or separation of the connecting seat and the connector. The assisted retractor according to claim 5, wherein the connector is two links, and an outer surface of the end of each of the links connected to the connecting seat is formed with the locking piece An annular groove that fits. A power assisted retractor according to any of claims 1-6, further comprising Included: a main assembly that surrounds the connector, the main assembly includes a motor that drives rotation of the traveling wheel set, and a power switch that controls the starting or closing of the motor is disposed above the main assembly, and the traveling wheel set is adjusted A speed selection switch for the travel speed, a charging interface, a power indicator for displaying the current battery level, and a handle. A shopping cart comprising the power assist retractor of any of claims 1-7, the shopping cart being a shopping cart having a shopping basket, two rear wheels and two front wheels. A wheelchair comprising the assisted retractor of any of claims 1-7, the wheelchair being a wheelchair having two rear wheels and one seat. A flatbed cart comprising the assisted retractor of any of claims 1-8, the flatbed cart having two rear wheels, two front wheels and one shelf.

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