Wheelchair tractor connection device

Abstract

A wheelchair tractor connecting device, including the head connecting block for being installed on the tractor, the head quick connector for connecting the head connecting block, the wheelchair connector for connecting the wheelchair frame, the head quick connector includes the fixed connecting seat, the movable connecting seat, the brake line and the finger, the utility model discloses the advantages are: the head quick connector can be adjusted in height on the head connecting block, to the quick adaptation of the wheelchair installation demand of different height, the head quick connector and the wheelchair connector can be connected and separated independently, and the better operation experience is provided for the demand of different people.

Description

Technical Field

[0001] This utility model relates to the technical field of electric wheelchair towing vehicle connection equipment, and specifically to a wheelchair towing vehicle connection device. 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 utility model is to address the above-mentioned shortcomings by providing a wheelchair traction device.

[0004] This utility model includes a front connecting block for installation on a tractor, a front quick connector for connecting the front connecting block, and a wheelchair connector for connecting a wheelchair frame. The front quick connector includes a fixed connecting seat, a movable connecting seat, a brake cable, and a lever. The fixed connecting seat is installed on the front connecting block by a set of screws. The bottom of the fixed connecting seat is swayably connected to a lower locking hook. One end of the bottom of the movable connecting seat is provided with a lower locking rod that works with the lower locking hook. One end of the top of the movable connecting seat is provided with an upper locking hook. The fixed connecting seat is provided with an upper locking rod that works with the upper locking hook. A tension spring is provided between the front end of the lower locking hook and the fixed connecting seat. The lever is installed on the handle of the tractor and controls the lower locking hook to swing downward and release from the lower locking rod through the brake cable. The wheelchair connector includes a front connecting tube, a rear connecting tube, and a control component for controlling the connection and separation of the front connecting tube and the rear connecting tube. One end of the front connecting tube is provided with a connecting tube connector for connecting to a movable connecting seat, and one end of the rear connecting tube is provided with a frame fixing connector and a frame adjustable connector for connecting to the wheelchair frame.

[0005] A vertical guide block is provided on one side of the front connecting block, 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 fixed connecting seat. The fixed connecting seat can be adjusted up and down and installed on the front connecting block and fixed by a pair of screws.

[0006] The lower locking hook is rotatably mounted on the fixed connecting seat via a pin. A pull rod is provided on the lower locking hook in front of the pin, and a lower spring fixing rod is provided on the lower locking hook behind the pin. An upper spring fixing rod is provided on the fixed connecting seat. The two ends of the tension spring are connected to the lower spring fixing rod and the upper spring fixing rod, respectively. A brake cable fixing seat is provided on the fixed connecting seat. One end of the brake cable is installed on the brake cable fixing seat, and one end of the brake cable pull cord is connected to the pull rod.

[0007] The connecting pipe joint and the movable connecting seat are connected by adjusting the locking screw. Both the connecting pipe joint and the movable connecting seat have a ring of matching locking teeth on their contact surfaces.

[0008] The frame fixing connector is a cross clamp. The rear connecting tube has a set of length adjustment holes. The frame adjustable connector has a connecting fork, and the connecting fork has a set of height adjustment holes that cooperate with the length adjustment holes. The frame adjustable connector is installed on the rear connecting tube through the connecting fork and locked with screws.

[0009] The front connecting pipe and the rear connecting pipe are connected by a connecting inner pipe. The front end of the connecting inner pipe is fixed to the front connecting pipe by a set of screws, and the rear end of the connecting inner pipe is movably inserted into the rear connecting pipe. The connection and separation actions between the connecting inner pipe and the rear connecting pipe are controlled by a control component.

[0010] The control assembly includes a handle, a control lever, and a pair of steel balls. A control lever mounting hole is located on the axis of the connecting inner tube, and the control lever is movably inserted into this hole. The control lever has an annular clearance groove that mates with the steel balls. Steel ball clearance holes communicating with the control lever mounting hole are located on both sides of the connecting inner tube. A steel ball positioning block is located on one side of the steel ball clearance hole on the connecting inner tube. A locking baffle is located on the rear connecting tube, which mates with the steel ball positioning block. The steel ball positioning block has a steel ball positioning groove, and the steel ball is located within the groove. The locking baffle has a steel ball locking groove, and the steel ball positioning groove has a steel ball positioning hole communicating with it. The handle can be hinged to the front connecting tube via a pivot and drives the control lever to move back and forth via a connecting rod.

[0011] The advantages of this utility model are: the quick connector at the front of the vehicle can be height adjusted on the connecting block at the front of the vehicle to quickly adapt to the installation needs of wheelchairs of different heights; both the quick connector at the front of the vehicle and the wheelchair connector can be connected and disconnected independently, providing a better operating experience for the needs of different people. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the quick connector structure at the front of the vehicle.

[0014] Figure 3 This is a schematic diagram of the wheelchair connector structure.

[0015] Figure 4 yes Figure 3 A partially enlarged structural diagram.

[0016] Figure 5 This is an exploded view of the wheelchair connector.

[0017] Figure 6 This is a schematic diagram of the structure of this utility model in use. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] As shown in the attached drawings, this utility model includes a front connecting block 2 for mounting on a tractor 1, a front quick connector 3 for connecting the front connecting block 2, and a wheelchair connector 5 for connecting the wheelchair frame 4. The front connecting block 2 has a handle mounting hole for the tractor 1 in the middle. The tractor 1 and the front connecting block 2 are rotatably connected to facilitate the rotation direction of the tractor 1. The front quick connector 3 and the wheelchair connector 5 can be connected and separated independently to suit the needs of different users. The front quick connector 3 and the wheelchair connector 5 are connected at an adjustable angle to adjust the tilt angle of the tractor 1 after installation.

[0023] Specifically, the vehicle head quick connector 3 includes a fixed connector 6, a movable connector 7, a brake cable 8, and a paddle shifter 9. The fixed connector 6 is mounted on the vehicle head connector 2 by a set of screws. The bottom of the fixed connector 6 is swayably connected to a lower locking hook 10. One end of the bottom of the movable connector 7 is provided with a lower locking rod 12 that works with the lower locking hook 10. One end of the top of the movable connector 7 is provided with an upper locking hook 13. The fixed connector 6 is provided with an upper locking rod 14 that works with the upper locking hook 13. A tension spring 15 is provided between the front end of the lower locking hook 10 and the fixed connector 6. The paddle shifter 9 is mounted on the handle of the tractor 1 and controls the lower locking hook 10 to swing downward and release from the lower locking rod 12 through the brake cable 8. The fixed connecting seat 6 is fixed to the front connecting block 2 with screws, and the movable connecting seat 7 is used to connect or separate from the fixed connecting seat 6 to quickly connect or separate the tractor 1 and the wheelchair frame 4.

[0024] The working principle of the quick connector 3 at the front of the vehicle is as follows: the fixed connecting seat 6 is provided with a lower locking rod positioning groove that cooperates with the lower locking rod 12. The front paddle shifter 9 controls one end of the lower locking hook 10 to swing downward through the brake cable 8. The hook head of the lower locking hook 10 moves out from the lower locking rod positioning groove and exposes the lower locking rod positioning groove. Then, the upper locking hook 13 is hooked onto the upper locking rod 14 from above. The upper part of the tractor 1 is pushed forward to align the lower locking rod 12 into the lower locking rod positioning groove. Then, the paddle shifter 9 is released, and the lower locking hook 10 resets itself under the action of the tension spring 15. The hook head of the lower locking hook 10 locks the lower locking rod 12.

[0025] The wheelchair connector 5 includes a front connecting tube 16, a rear connecting tube 17, and a control component 18 for controlling the connection and separation of the front connecting tube 16 and the rear connecting tube 17. One end of the front connecting tube 16 is provided with a connecting tube connector 20 that is connected to the movable connecting seat 7, and one end of the rear connecting tube 17 is provided with a frame fixing connector 21 and a frame adjustable connector 22 for connecting to the wheelchair frame 4.

[0026] The wheelchair connector 5 operates as follows: the connecting pipe joint 20 is fixedly connected to the front connecting pipe 16, the connecting pipe joint 20 is angularly adjustable to the movable connecting seat 7, the rear connecting pipe 17 is fixed to the wheelchair frame 4 through the frame fixing connector 21 and the frame adjustable connector 22, the front connecting pipe 16 and the rear connecting pipe 17 are detachably connected, and the front connecting pipe 16 and the rear connecting pipe 17 can be quickly connected or disconnected through the control component 18.

[0027] Furthermore, a vertical guide block is provided on one side of the front connecting block 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 fixed connecting seat 6. The fixed connecting seat 6 can be adjusted up and down and installed on the front connecting block 2, and is fixed by a pair of screws.

[0028] The connection between the fixed connecting seat 6 and the front connecting block 2 is made more stable by the cooperation of the vertical guide block and the guide groove. Then, the two are fixed by a pair of screws. The position of the fixed connecting seat 6 connected to the front connecting block 2 can be adjusted according to the height of the wheelchair frame 4 to adapt to wheelchair frames 4 of different heights.

[0029] Furthermore, the lower locking hook 10 is rotatably mounted on the fixed connecting seat 6 via a pin. The lower locking hook 10 located in front of the pin is provided with a pull rod 23, and the lower locking hook 10 located behind the pin is provided with a lower spring fixing rod 24. The fixed connecting seat 6 is provided with an upper spring fixing rod 25. The two ends of the tension spring 15 are respectively connected to the lower spring fixing rod 24 and the upper spring fixing rod 25. The fixed connecting seat 6 is provided with a brake cable fixing seat 26. One end of the brake cable 8 is installed on the brake cable fixing seat 26, and one end of the pull cable of the brake cable 8 is connected to the pull rod 23.

[0030] Pull rod 23 is used to connect the brake cable 8. The shifter 9 controls the movement of the brake cable 8, thereby lifting pull rod 23 upward. At the same time, the hook end of the lower locking hook 10 swings downward, exposing the lower locking rod positioning groove, which facilitates the lower locking rod 12 to be quickly positioned into the lower locking rod positioning groove. There are two tension springs 15. In the default state, they apply an upward pulling force to the hook end of the lower locking hook 10, so that the hook end is always in a locked state when no external force is applied.

[0031] Furthermore, the connecting pipe joint 20 and the movable connecting seat 7 are connected by adjusting the locking screw 35, and both the connecting pipe joint 20 and the movable connecting seat 7 are provided with a ring of matching locking teeth 36 on their contact surfaces.

[0032] One end of the adjusting locking screw 35 passes through the connecting pipe joint 20 and is threadedly connected to the movable connecting seat 7. After the adjusting locking screw 35 is tightened, the connecting pipe joint 20 and the movable connecting seat 7 are locked by the mutual meshing of the locking gear 36. After the adjusting locking screw 35 is loosened, the connecting pipe joint 20 and the movable connecting seat 7 can be rotated to adjust the angle.

[0033] Preferably, the frame fixing connector 21 is a cross clamp, the rear connecting tube 17 is provided with a set of length adjustment holes, the frame adjustable connector 22 is provided with a connecting fork, and the connecting fork is provided with a set of height adjustment holes that cooperate with the length adjustment holes. The frame adjustable connector 22 is installed on the rear connecting tube 17 through the connecting fork and locked by a screw.

[0034] The frame fixing connector 21 is used to fix the rear crossbar of the wheelchair frame 4, and the frame adjustable connector 22 is used to fix the front crossbar of the wheelchair frame 4. When connecting, the frame adjustable connector 22 can be adjusted to be installed on the rear connecting tube 17 according to the position and height of the front crossbar.

[0035] Furthermore, the front connecting pipe 16 and the rear connecting pipe 17 are connected by a connecting inner pipe 38. The front end of the connecting inner pipe 38 is fixed to the front connecting pipe 16 by a set of screws, and the rear end of the connecting inner pipe 38 is movably inserted into the rear connecting pipe 17. The connection and separation actions between the connecting inner pipe 38 and the rear connecting pipe 17 are controlled by the control component 18.

[0036] Preferably, the control assembly 18 includes a handle 40, a control lever 41, and a pair of steel balls 42. A control lever mounting through hole is provided on the axis of the connecting inner tube 38. The control lever 41 is movably inserted into the control lever mounting through hole. The control lever 41 is provided with an annular clearance groove 48 that cooperates with the steel balls 42. Steel ball clearance holes communicating with the control lever mounting through hole are provided on both sides of the connecting inner tube 38. A steel ball positioning block 44 is provided on the connecting inner tube 38 located on one side of the steel ball clearance hole. A locking baffle 45 that cooperates with the steel ball positioning block 44 is provided on the rear connecting tube 17. A steel ball positioning groove 46 is provided on the steel ball positioning groove 46. The steel ball 42 is located in the steel ball positioning groove 46. A steel ball locking groove 47 is provided on the locking baffle 45. A steel ball positioning hole communicating with the steel ball locking groove 47 is provided on the steel ball positioning groove 46. The handle 40 can be hinged to the front connecting tube 16 through a rotating shaft and drives the control lever 41 to move back and forth through a connecting rod.

[0037] A torsion spring is provided on the shaft of the handle 40 to control the return of the handle 40. By default, the steel ball 42 is misaligned with the annular clearance groove 48. The steel ball 42 is pushed into the steel ball positioning groove 46 by the control rod 41. At this time, part of the steel ball 42 is located in the steel ball locking groove 47. The steel ball positioning block 44 and the locking baffle 45 are connected together by the steel ball 42, so that the connecting inner tube 38 and the rear connecting tube 17 are fixed. When separation is required, press the handle 40, and the control rod 41 moves backward a certain distance. When the annular clearance groove 48 moves to the position of the steel ball 42, the connecting inner tube 38 is pulled outward. At this time, the steel ball 42 has sufficient displacement to enter the annular clearance groove 48. The steel ball 42 moves out of the steel ball locking groove 47, thereby separating the steel ball positioning block 44 and the locking baffle 45, so that the connecting inner tube 38 can be smoothly pulled out from the rear connecting tube 17.

Claims

1. A wheelchair traction device, characterized in that... Includes a front connecting block (2) for mounting on a tractor (1), a front quick connector (3) for connecting the front connecting block (2), and a wheelchair connector (5) for connecting the wheelchair frame (4). The front quick connector (3) includes a fixed connector (6), a movable connector (7), a brake cable (8), and a lever (9). The fixed connector (6) is mounted on the front connecting block (2) by a set of screws. The bottom of the fixed connector (6) is swayably connected to a lower locking hook (10). The bottom of the movable connector (7) is... One end of the part is provided with a lower locking rod (12) that works with the lower locking hook (10), the top end of the movable connecting seat (7) is provided with an upper locking hook (13), the fixed connecting seat (6) is provided with an upper locking rod (14) that works with the upper locking hook (13), a tension spring (15) is provided between the front end of the lower locking hook (10) and the fixed connecting seat (6), and a finger lever (9) is installed on the handle of the tractor (1) and controls the lower locking hook (10) to swing downward and release from the lower locking rod (12) through the brake cable (8); The wheelchair connector (5) includes a front connecting tube (16), a rear connecting tube (17), and a control component (18) for controlling the connection and separation of the front connecting tube (16) and the rear connecting tube (17). One end of the front connecting tube (16) is provided with a connecting tube connector (20) connected to the movable connecting seat (7), and one end of the rear connecting tube (17) is provided with a frame fixing connector (21) and a frame adjustable connector (22) for connecting to the wheelchair frame (4).

2. The wheelchair traction vehicle connecting device according to claim 1, characterized in that... A vertical guide block is provided on one side of the front connecting block (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 fixed connecting seat (6). The fixed connecting seat (6) can be adjusted up and down and installed on the front connecting block (2), and is fixed by a pair of screws.

3. The wheelchair traction vehicle connecting device according to claim 1, characterized in that... The lower locking hook (10) is rotatably mounted on the fixed connecting seat (6) via a pin. The lower locking hook (10) located in front of the pin is provided with a pull rod (23), and the lower locking hook (10) located behind the pin is provided with a lower spring fixing rod (24). The fixed connecting seat (6) is provided with an upper spring fixing rod (25). The two ends of the tension spring (15) are respectively connected to the lower spring fixing rod (24) and the upper spring fixing rod (25). The fixed connecting seat (6) is provided with a brake cable fixing seat (26). One end of the brake cable (8) is installed on the brake cable fixing seat (26), and one end of the pull cable of the brake cable (8) is connected to the pull rod (23).

4. The wheelchair traction vehicle connecting device according to claim 1, characterized in that... The connecting pipe joint (20) and the movable connecting seat (7) are connected by adjusting the locking screw (35). Both the connecting pipe joint (20) and the movable connecting seat (7) have a ring of locking teeth (36) on their contact surfaces.

5. A wheelchair traction vehicle connecting device according to claim 1, characterized in that... The frame fixing connector (21) is a cross clamp. The rear connecting tube (17) is provided with a set of length adjustment holes. The frame adjustable connector (22) is provided with a connecting fork, and the connecting fork is provided with a set of height adjustment holes that cooperate with the length adjustment holes. The frame adjustable connector (22) is installed on the rear connecting tube (17) through the connecting fork and locked by a screw.

6. A wheelchair traction vehicle connecting device according to claim 1, characterized in that... The front connecting pipe (16) and the rear connecting pipe (17) are connected by a connecting inner pipe (38). The front end of the connecting inner pipe (38) is fixed to the front connecting pipe (16) by a set of screws, and the rear end of the connecting inner pipe (38) is movably inserted into the rear connecting pipe (17). The connection and separation actions between the connecting inner pipe (38) and the rear connecting pipe (17) are controlled by a control component (18).

7. A wheelchair traction vehicle connecting device according to claim 6, characterized in that... The control assembly (18) includes a handle (40), a control lever (41), and a pair of steel balls (42). A control lever mounting through hole is provided on the axis of the connecting inner tube (38). The control lever (41) is movably inserted into the control lever mounting through hole. An annular clearance groove (48) that cooperates with the steel balls (42) is provided on the control lever (41). Steel ball clearance holes communicating with the control lever mounting through hole are provided on both sides of the connecting inner tube (38). A steel ball positioning stop (44) is provided on the connecting inner tube (38) located on one side of the steel ball clearance hole. The rear connecting pipe (17) is provided with a locking baffle (45) that works in conjunction with the ball positioning block (44). The ball positioning block (44) is provided with a ball positioning groove (46). The ball (42) is located in the ball positioning groove (46). The locking baffle (45) is provided with a ball locking groove (47). The ball positioning groove (46) is provided with a ball positioning hole that communicates with the ball locking groove (47). The handle (40) can be hinged to the front connecting pipe (16) through a rotating shaft and the control rod (41) can be moved back and forth through a connecting rod.

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