Length adjustable wheelchair traction connection device

Abstract

A length adjustable wheelchair traction connecting device, including a vehicle head connecting pipe for being installed on a traction vehicle, a wheelchair connector for connecting a wheelchair frame, and a vehicle head quick connector for quickly connecting and separating the vehicle head connecting pipe and the wheelchair connector, the wheelchair connector includes a fixed embracing part and an adjustable embracing part, the fixed embracing part and the adjustable embracing part are respectively detachably installed on two cross bars of the wheelchair frame, the utility model has the advantages that: the vehicle head quick connector can be adjusted in height and angle on the vehicle head connecting pipe, so as to quickly adapt to the installation requirements of wheelchairs of different heights, and the vehicle head quick connector can be quickly connected and separated through a brake wire, thereby providing good operation experience for the user group.

Description

Technical Field

[0001] This utility model relates to the technical field of electric wheelchair traction connection equipment, specifically to a wheelchair traction connection device with adjustable length. Background Technology

[0002] Wheelchairs are widely used as a means of transportation for the sick, disabled, elderly and infirm. Manual wheelchairs have limited range of motion and are time-consuming and laborious to travel long distances. Split-type electric wheelchairs are made by detaching and connecting an electric tractor to the wheelchair. How to quickly and easily connect, separate and adjust them directly affects the user's operating experience. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned shortcomings by providing a wheelchair traction connection device with adjustable length.

[0004] This utility model includes a front connecting pipe for mounting on a tractor, a wheelchair connector for connecting a wheelchair frame, and a front quick connector for quickly connecting and disconnecting the front connecting pipe and the wheelchair connector. The wheelchair connector includes a fixed clamping component and an adjustable clamping component, which are detachably mounted on two crossbars of the wheelchair frame. The head unit quick connector includes a movable connecting rod, a fixed connecting rod, and a dial indicator. The head unit connecting tube is equipped with a height adjustment seat. The front end of the movable connecting rod is rotatably connected to and fixed to the height adjustment seat. The rear end of the fixed connecting rod is connected to both the fixed clamping component and the adjustable clamping component. The front end of the fixed connecting rod is equipped with a front locking rod and a rear locking rod. The rear end of the movable connecting rod is equipped with a front locking rod connection positioning groove that mates with the front locking rod, a rear locking rod connection positioning groove that mates with the rear locking rod, and a locking hook that locks with the rear locking rod. The dial indicator is mounted on the handlebars of the tractor and controls the locking hook to swing and separate from the rear locking rod via a brake cable.

[0005] A vertical guide block is provided on one side of the head connector pipe, and a set of positioning and locking holes are provided on the vertical guide block. A guide groove that cooperates with the vertical guide block is provided on one side of the height adjustment seat. The height adjustment seat can be adjusted up and down and installed on the head connector pipe and fixed by a pair of screws.

[0006] The movable connecting rod and the height adjustment seat are connected by an adjusting locking screw. Both the movable connecting rod and the height adjustment seat have a ring of matching locking teeth on their contact surfaces.

[0007] The fixed connecting rod is assembled from two connecting plates on the left and right. The fixed clamping component is fixed to the rear end of the fixed connecting rod by a pair of screws. Each of the two connecting plates has a set of adjustment elongated holes in the middle. The adjustable clamping component is located between the two connecting plates and is fixed by screws cooperating with the adjustment elongated holes.

[0008] The bottom end of the locking hook is hinged to the movable connecting rod by a pin, and the top end of the locking hook is provided with a brake line fixing pin. One end of the brake line pull rope is connected to the brake line fixing pin, and a tensioning spring is provided between the locking hook and the movable connecting rod.

[0009] A brake cable steering roller is provided on the movable connecting rod at the front end of the locking hook. One end of the brake cable pull rope passes around the brake cable steering roller and is connected to the brake cable fixing pin.

[0010] The advantages of this invention are: the quick connector at the front of the vehicle can be adjusted in height and angle on the connecting tube at the front of the vehicle to quickly adapt to the installation needs of wheelchairs of different heights; the quick connector at the front of the vehicle can be quickly connected and disconnected via the brake cable, providing users with a good operating experience. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the disassembled structure of this utility model.

[0013] Figure 3 yes Figure 2 A partially enlarged structural diagram.

[0014] Figure 4 This is a schematic diagram of the structure of this utility model in use. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0017] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model. Furthermore, if terms such as "first" or "second" appear in the description of this utility model, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] As shown in the attached drawings, this utility model includes a front connecting pipe 2 for mounting on a tractor 1, a wheelchair connector 5 for connecting a wheelchair frame 4, and a front quick connector 3 for quickly connecting and disconnecting the front connecting pipe 2 and the wheelchair connector 5. The tractor head connecting pipe 2 has a handle mounting hole for the tractor 1 in the middle. The tractor 1 and the tractor head connecting pipe 2 are rotatably connected, facilitating the rotation direction of the tractor 1. The tractor head quick connector 3 can be quickly connected and disconnected. The wheelchair connector 5 is used for fixed connection with the crossbar of the wheelchair frame 4. The tractor head quick connector 3 and the tractor head connecting pipe 2 are angle-adjustable, used to adjust the tilt angle of the tractor 1 after installation.

[0020] Specifically, the wheelchair connector 5 includes a fixed clamping component 6 and an adjustable clamping component 7, which are detachably mounted on the two crossbars of the wheelchair frame 4. The fixed clamping component 6 is fixed in position and is fixedly connected to the crossbar at the rear end of the wheelchair frame 4. The position of the adjustable clamping component 7 can be flexibly adjusted and fixed according to the position and height of the crossbar at the front end of the wheelchair frame 4. The two connecting parts, the fixed clamping component 6 and the adjustable clamping component 7, make the installation more stable.

[0021] The vehicle head quick connector 3 includes a movable connecting rod 8, a fixed connecting rod 9, and a lever 10. The vehicle head connecting pipe 2 is equipped with a height adjustment seat 11. The front end of the movable connecting rod 8 is rotatably connected to and fixed with the height adjustment seat 11. The rear end of the fixed connecting rod 9 is connected to the fixed clamping member 6 and the adjustable clamping member 7 respectively. The front end of the fixed connecting rod 9 is equipped with a front locking rod 13 and a rear locking rod 14 respectively. The rear end of the movable connecting rod 8 is equipped with a front locking rod connecting positioning groove 15 that cooperates with the front locking rod 13, a rear locking rod connecting positioning groove 16 that cooperates with the rear locking rod 14, and a locking hook 17 that cooperates with the rear locking rod 14 for locking. The lever 10 is installed on the handle of the tractor 1 and controls the locking hook 17 to swing and separate from the rear locking rod 14 through the brake cable 18.

[0022] During connection, the lever 10 controls the locking hook 17 to release via the brake cable 18. The movable connecting rod 8 moves backward so that the front locking rod connecting positioning groove 15 and the rear locking rod connecting positioning groove 16 are aligned with the front locking rod 13 and the rear locking rod 14, respectively. Then, the locking hook 17 is reset. The locking hook 17 and the rear locking rod connecting positioning groove 16 cooperate vertically to hold the rear locking rod 14 tightly. The opening of the front locking rod connecting positioning groove 15 faces forward to limit the vertical and rearward movement of the front locking rod 13. The opening of the rear locking rod connecting positioning groove 16 faces upward to limit the horizontal and downward movement of the rear locking rod 14. Together with the upper locking hook 17, the movable connecting rod 8 and the fixed connecting rod 9 can be fixed. Conversely, when separation is required, simply open the locking hook 17, pull the tractor 1 backward, the rear locking rod 14 first moves out of the rear locking rod connecting positioning groove 16, then control the tractor 1 to pull backward as a whole, and then move the front locking rod 13 out of the front locking rod connecting positioning groove 15 to quickly connect the tractor 1 and the wheelchair frame 4.

[0023] Furthermore, a vertical guide block is provided on one side of the head connector 2, and a set of positioning and locking holes are provided on the vertical guide block. A guide groove that cooperates with the vertical guide block is provided on one side of the height adjustment seat 11. The height adjustment seat 11 can be adjusted up and down and installed on the head connector 2, and is fixed by a pair of screws.

[0024] The installation position of the height adjustment seat 11 can be adjusted according to the connection height of the wheelchair frame 4.

[0025] Preferably, the movable connecting rod 8 and the height adjusting seat 11 are connected by an adjusting locking screw 20, and a locking toothed disc 21 is provided on the contact surface of both the movable connecting rod 8 and the height adjusting seat 11.

[0026] One end of the adjusting locking screw 20 passes through the movable connecting rod 8 and is threadedly connected to the height adjusting seat 11. After the adjusting locking screw 20 is tightened, the movable connecting rod 8 and the height adjusting seat 11 are locked by the mutual meshing of the locking gear 21. After the adjusting locking screw 20 is loosened, the movable connecting rod 8 and the height adjusting seat 11 can be rotated to adjust the angle.

[0027] Preferably, the fixed connecting rod 9 is assembled from two connecting plates on the left and right. The fixed clamping member 6 is fixed to the rear end of the fixed connecting rod 9 by a pair of screws. Each of the two connecting plates is provided with a set of adjusting elongated holes in the middle. The adjustable clamping member 7 is located between the two connecting plates and is fixed by screws cooperating with the adjusting elongated holes.

[0028] The adjusting elongated hole is inclined, and the adjustable clamping member 7 is provided with a connecting elongated hole corresponding to the connecting plate. The adjustable clamping member 7 and the fixed connecting rod 9 are fastened together by a screw. The height and front-back position of the entire adjustable clamping member 7 can be adjusted by moving the screw in the adjusting elongated hole and the connecting elongated hole.

[0029] Furthermore, the bottom end of the locking hook 17 is hinged to the movable connecting rod 8 by a pin, and the top end of the locking hook 17 is provided with a brake line fixing pin 30. One end of the pull rope of the brake line 18 is connected to the brake line fixing pin 30, and a tensioning spring 32 is provided between the locking hook 17 and the movable connecting rod 8.

[0030] By default, the tension spring 32 holds the top end of the locking hook 17 back, keeping it pressed against the rear locking rod 14. When it needs to be released, the shifter 10 pulls the brake cable fixing pin 30 through the brake cable 18, causing the top end of the locking hook 17 to swing forward, releasing the pressure on the rear locking rod 14. After the shifter 10 is released, the locking hook 17 returns to its original position under the reaction force of the tension spring 32.

[0031] Furthermore, a brake cable steering roller 35 is provided on the movable connecting rod 8 located at the front end of the locking hook 17, and one end of the pull rope of the brake cable 18 passes around the brake cable steering roller 35 and is connected to the brake cable fixing pin 30.

[0032] The brake cable steering roller 35 has an annular groove in the middle for positioning the pull rope of the brake cable 18. The brake cable steering roller 35 is a rotating component. The pull rope of the brake cable 18 passes around the bottom of the brake cable steering roller 35 and tilts upward to change direction, making its movement smoother.

Claims

1. A length-adjustable wheelchair traction connection device, characterized in that... It includes a front connecting pipe (2) for mounting on a tractor (1), a wheelchair connector (5) for connecting a wheelchair frame (4), and a front quick connector (3) for quickly connecting and disconnecting the front connecting pipe (2) and the wheelchair connector (5). The wheelchair connector (5) includes a fixed clamping member (6) and an adjustable clamping member (7). The fixed clamping member (6) and the adjustable clamping member (7) are detachably mounted on two crossbars of the wheelchair frame (4). The headboard quick connector (3) includes a movable connecting rod (8), a fixed connecting rod (9), and a dial (10). The headboard connecting tube (2) is provided with a height adjustment seat (11). The front end of the movable connecting rod (8) is rotatably connected to and fixed with the height adjustment seat (11). The rear end of the fixed connecting rod (9) is connected to the fixed clamping member (6) and the adjustable clamping member respectively. (7) The front end of the fixed connecting rod (9) is provided with a front locking rod (13) and a rear locking rod (14). The rear end of the movable connecting rod (8) is provided with a front locking rod connecting positioning groove (15) that cooperates with the front locking rod (13), a rear locking rod connecting positioning groove (16) that cooperates with the rear locking rod (14), and a locking hook (17) that cooperates with the rear locking rod (14) for locking. The finger lever (10) is installed on the handle of the tractor (1) and the locking hook (17) is controlled to swing and separate from the rear locking rod (14) by the brake cable (18).

2. The adjustable wheelchair traction connection device according to claim 1, characterized in that... A vertical guide block is provided on one side of the head connector (2), and a set of positioning locking holes is provided on the vertical guide block. A guide groove that cooperates with the vertical guide block is provided on one side of the height adjustment seat (11). The height adjustment seat (11) can be adjusted up and down and installed on the head connector (2), and is fixed by a pair of screws.

3. The adjustable wheelchair traction connection device according to claim 1, characterized in that... The movable connecting rod (8) and the height adjustment seat (11) are connected by an adjusting locking screw (20). Both the movable connecting rod (8) and the height adjustment seat (11) have a ring of locking teeth (21) on their contact surfaces.

4. The adjustable wheelchair traction connection device according to claim 1, characterized in that... The fixed connecting rod (9) is assembled from two connecting plates on the left and right. The fixed clamping part (6) is fixed to the rear end of the fixed connecting rod (9) by a pair of screws. A set of adjustment elongated holes is provided in the middle of the two connecting plates. The adjustable clamping part (7) is located between the two connecting plates and is fixed by screws and adjustment elongated holes.

5. The adjustable wheelchair traction connection device according to claim 1, characterized in that... The bottom end of the locking hook (17) is hinged to the movable connecting rod (8) by a pin. The top end of the locking hook (17) is provided with a brake line fixing pin (30). One end of the pull rope of the brake line (18) is connected to the brake line fixing pin (30). A tensioning spring (32) is provided between the locking hook (17) and the movable connecting rod (8).

6. The adjustable wheelchair traction connection device according to claim 5, characterized in that... A brake line steering roller (35) is provided on the movable connecting rod (8) at the front end of the locking hook (17). One end of the pull rope of the brake line (18) passes around the brake line steering roller (35) and is connected to the brake line fixing pin (30).

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