Quick coupling device for wheelchair tractor

Abstract

A wheelchair tractor quick 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 fixed connecting seat, movable connecting seat, brake line and finger, the utility model discloses the height adjustment can be carried out on the head connecting block to the quick adaptation of different height wheelchair installation demand of head quick connector, and the head quick connector and wheelchair connector can all be connected and separated to the head and wheelchair quickly, and 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, specifically to a wheelchair towing vehicle quick 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 quick connection device for a wheelchair tow vehicle.

[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 fixed crossbar, a pair of width-adjustable crossbars, and a pair of connecting clamping assemblies. The fixed crossbar is equipped with a connecting pipe joint that connects to the movable connecting seat. The pair of width-adjustable crossbars are respectively adjustable and installed at both ends of the fixed crossbar. The pair of connecting clamping assemblies are respectively installed on the corresponding width-adjustable crossbars and connected 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 fixed crossbar is composed of two pieces. The end of the fixed crossbar is provided with a locking notch. The width adjusting crossbar is movably inserted into the fixed crossbar and locked by a set of fasteners. One end of the width adjusting crossbar is fixed to the connecting clamping assembly.

[0009] The connecting clamping assembly includes a middle connecting block, a left clamping connecting plate, a right clamping connecting plate, a pair of clamping wrenches, and a locking wrench connecting plate. One end of the width adjusting crossbar is equipped with a locking sleeve, and one end of the middle connecting block is equipped with a connecting rod that cooperates with the locking sleeve. The left and right clamping connecting plates are symmetrically hinged to the middle connecting block. The locking wrench connecting plate drives the left and right clamping connecting plates to perform clamping and loosening actions through a pair of clamping wrenches.

[0010] The left clamping connecting plate has a left connecting post, the right clamping connecting plate has a right connecting post, and a connecting plate mounting post is provided between a pair of clamping wrenches. The connecting plate mounting post and the right connecting post are connected by a clamping screw. The middle connecting block is provided with a connecting plate mounting post clearance hole and a clamping screw clearance hole respectively. One end of the pair of clamping wrenches is hinged to the left clamping connecting plate through the left connecting post, and the other end of the pair of clamping wrenches is fixedly connected to the locking wrench connecting plate.

[0011] The advantages of this invention are: the quick connector for the vehicle front can be height-adjusted on the vehicle front connecting block to quickly adapt to the installation needs of wheelchairs of different heights; both the quick connector for the vehicle front and the wheelchair connector can quickly connect and disconnect the vehicle front and the wheelchair, 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 This is an exploded view of the wheelchair connector.

[0016] Figure 5 This is a schematic diagram of the connecting and clamping component structure.

[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, facilitating the rotation direction of the tractor 1. The front quick connector 3 can be connected and disconnected independently, and the wheelchair connector 5 can be quickly connected and disconnected from the wheelchair frame 4, suitable for connecting the uprights on both sides of the front end of the wheelchair frame. 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 used to fix it to the front connecting block 2, and the movable connecting seat 7 is used to connect or separate from the fixed connecting seat 6 so as 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 is installed and the lower locking hook 10 is swung 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 hung on 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 is automatically reset 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 fixed crossbar 16, a pair of width-adjustable crossbars 17, and a pair of connecting clamping assemblies 18. The fixed crossbar 16 is provided with a connecting pipe joint 20 that is connected to the movable connecting seat 7. The pair of width-adjustable crossbars 17 are respectively adjustable and installed at both ends of the fixed crossbar 16. The pair of connecting clamping assemblies 18 are respectively installed on the corresponding width-adjustable crossbars 17 and connected to the wheelchair frame 4.

[0026] The wheelchair connector 5 operates as follows: the connecting pipe joint 20 is fixedly connected to the fixed crossbar 16, the connecting pipe joint 20 is connected to the movable connecting seat 7 at an adjustable angle, a pair of width adjusting crossbars 17 can move laterally on the fixed crossbar 16 and be fixed to adapt to different widths of the wheelchair frame 4, and a pair of connecting clamping components 18 are respectively fixed on the two uprights at the front end of the wheelchair frame 4. The connecting clamping component 18 is a quick clamping component, which facilitates quick connection and separation from the wheelchair frame 4.

[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 fixed crossbar 16 is composed of two pieces assembled together. The end of the fixed crossbar 16 is provided with a locking notch. The width adjusting crossbar 17 is movably inserted into the fixed crossbar 16 and locked by a set of fasteners. One end of the width adjusting crossbar 17 is fixed to the connecting clamping assembly 18.

[0034] Two fixed crossbars 16 are symmetrically and detachably connected to the connecting pipe joint 20. The fastener locking consists of a double-ended threaded sleeve and a pair of screws. The locking notch allows one end of the fixed crossbar 16 to have a tightening function. The width adjusting crossbar 17 is provided with a double-ended threaded sleeve clearance hole. After the width adjusting crossbar 17 is inserted into the fixed crossbar 16, the double-ended threaded sleeve is inserted into the hole. Then, a pair of screws are screwed onto the double-ended threaded sleeve from both ends, applying pressure to both sides of the locking notch to fasten the width adjusting crossbar 17 to the fixed crossbar 16.

[0035] Preferably, the connecting clamping assembly 18 includes a middle connecting block 40, a left clamping connecting plate 41, a right clamping connecting plate 42, a pair of clamping wrenches 43, and a locking wrench connecting plate 44. One end of the width adjusting crossbar 17 is provided with a locking sleeve, and one end of the middle connecting block 40 is provided with a connecting rod that cooperates with the locking sleeve. The left clamping connecting plate 41 and the right clamping connecting plate 42 are symmetrically hinged to the middle connecting block 40. The locking wrench connecting plate 44 drives the left clamping connecting plate 41 and the right clamping connecting plate 42 to perform clamping and loosening actions through the pair of clamping wrenches 43.

[0036] The left clamping connecting plate 41 is provided with a left connecting post 46, and the right clamping connecting plate 42 is provided with a right connecting post 47. A connecting plate mounting post 50 is provided between a pair of clamping wrenches 43. The connecting plate mounting post 50 and the right connecting post 47 are connected by a clamping screw 51. The middle connecting block 40 is provided with a connecting plate mounting post clearance hole and a clamping screw 51 clearance hole respectively. One end of the pair of clamping wrenches 43 is hinged to the left clamping connecting plate 41 through the left connecting post 46, and the other end of the pair of clamping wrenches 43 is fixedly connected to the locking wrench connecting plate 44.

[0037] The left-side clamping connecting plate 41 and the right-side clamping connecting plate 42 are symmetrically hinged to the middle connecting block 40 to form a clamp, which is used to clamp the uprights of the wheelchair frame 4. The locking wrench connecting plate 44 is equipped with a handle. When in use, the handle is turned, and the locking wrench connecting plate 44 swings with a pair of clamping wrenches 43. The connecting plate mounting post 50 drives the right clamping connecting plate 42 to swing to one side through the clamping screw 51, while the left clamping connecting plate 41 swings to the other side. The left clamping connecting plate 41 and the right clamping connecting plate 42 swing in opposite directions, thereby realizing the cooperation of the left connecting post 46 and the right clamping connecting plate 42 to perform clamping or loosening actions.

Claims

1. A quick-connect device for a wheelchair tractor, 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 fixed crossbar (16), a pair of width-adjustable crossbars (17) and a pair of connecting clamping assemblies (18). The fixed crossbar (16) is provided with a connecting pipe joint (20) that is connected to the movable connecting seat (7). The pair of width-adjustable crossbars (17) are respectively adjustable and installed at both ends of the fixed crossbar (16). The pair of connecting clamping assemblies (18) are respectively installed on the corresponding width-adjustable crossbars (17) and connected to the wheelchair frame (4).

2. The wheelchair tractor quick connection 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 tractor quick connection 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 tractor quick connection 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 quick-connect device for a wheelchair tractor according to claim 1, characterized in that... The fixed crossbar (16) is composed of two pieces. The end of the fixed crossbar (16) is provided with a locking notch. The width adjusting crossbar (17) is movably inserted into the fixed crossbar (16) and locked by a set of fasteners. One end of the width adjusting crossbar (17) is fixed to the connecting clamping assembly (18).

6. A quick-connect device for a wheelchair tractor according to claim 5, characterized in that... The connecting clamping assembly (18) includes a middle connecting block (40), a left clamping connecting plate (41), a right clamping connecting plate (42), a pair of clamping wrenches (43), and a locking wrench connecting plate (44). One end of the width adjusting crossbar (17) is provided with a locking sleeve, and one end of the middle connecting block (40) is provided with a connecting rod that cooperates with the locking sleeve. The left clamping connecting plate (41) and the right clamping connecting plate (42) are symmetrically hinged on the middle connecting block (40). The locking wrench connecting plate (44) drives the left clamping connecting plate (41) and the right clamping connecting plate (42) to perform clamping and loosening actions through a pair of clamping wrenches (43).

7. A wheelchair tractor quick-connection device according to claim 6, characterized in that... The left clamping connecting plate (41) is provided with a left connecting post (46), the right clamping connecting plate (42) is provided with a right connecting post (47), a connecting plate mounting post (50) is provided between a pair of clamping wrenches (43), the connecting plate mounting post (50) and the right connecting post (47) are connected by a clamping screw (51), the middle connecting block (40) is provided with a connecting plate mounting post clearance hole and a clamping screw clearance hole respectively, one end of a pair of clamping wrenches (43) is hinged to the left clamping connecting plate (41) through the left connecting post (46), and the other end of a pair of clamping wrenches (43) is fixedly connected to the locking wrench connecting plate (44).

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