Wheelchair tractor head connecting device

Abstract

A wheelchair tractor head connecting device comprises a fixed locking seat (7) and a movable connecting seat (8), the rear end of the fixed locking seat (7) is provided with an upper locking rod (10) and a lower locking groove (11), and the fixed locking seat (7) is provided with a movable locking hook (12) matched and locked with the opening side of the lower locking groove (11) and a control shifting rod (13) for controlling the movable locking hook (12) to be opened and closed. The split type electric wheelchair tractor has the advantages that the tractor and the wheelchair are connected in a split mode, the split type electric wheelchair tractor is convenient to install, a user can conveniently go out in a long distance independently, and the split type electric wheelchair tractor is simple in structure, convenient to use and high in practicability. And the connecting device can be quickly connected and disassembled through the matching of the movable lock hook, the fixed lock hook and the corresponding locking rod, so that the use is convenient and quick, and the experience feeling of a user is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchair auxiliary equipment, in particular to a wheelchair traction head connection device. Background Art

[0002] Manual wheelchairs have been widely used as a means of transportation for the injured, elderly and weak, but the user's range of movement is limited and long-distance travel is impossible. The use environment of integrated electric wheelchairs is subject to certain restrictions and is not flexible enough. The existing connection method between electric tractors and wheelchairs is relatively complicated, resulting in a poor user experience. Utility Model Content

[0003] The purpose of this utility model is to provide a wheelchair traction head connection device to address the above-mentioned deficiencies.

[0004] The utility model includes a fixed locking seat and a movable connecting seat, the front end of the fixed locking seat is provided with a connecting sleeve connected to the vehicle head, the rear end of the fixed locking seat is respectively provided with an upper locking rod and a lower locking groove, the fixed locking seat is respectively provided with a movable locking hook that cooperates with the opening side of the lower locking groove and is locked, and a control lever that controls the opening and closing of the movable locking hook, the movable connecting seat is respectively provided with a fixed locking hook that cooperates with the upper locking rod and a pair of connecting rods connected to the wheelchair pillars, the fixed locking hook is provided with a lower locking rod that cooperates with the lower locking groove.

[0005] One side of the connecting sleeve is open, and a connecting part is provided on the opening side. A connecting positioning groove matching the connecting part is provided at the front end of the connecting sleeve. The connecting sleeve is detachably mounted on the fixed locking seat through a set of screws.

[0006] The fixed locking seat is provided with a plug-in positioning groove that cooperates with the fixed locking hook, and the upper locking rod is located in the plug-in positioning groove. There are two lower locking grooves and two movable locking hooks, and they are respectively located on both sides of the plug-in positioning groove. The two movable locking hooks are connected by a first connecting shaft and are hinged to the fixed locking seat through a pin shaft. A tensioning spring is provided between the first connecting shaft and the fixed locking seat, and the control lever is hinged to the fixed locking seat through a pin shaft. A second connecting shaft is provided at one end of the bottom of the control lever, and a pull rod connected to the first connecting shaft is provided on the second connecting shaft.

[0007] The two ends of the pull rod are movably connected to the first connecting shaft and the second connecting shaft respectively. There are two tensioning springs, which are respectively located on both sides of the pull rod; the fixed locking seat is respectively provided with a first connecting shaft guide long hole and a second connecting shaft guide long hole, and the first connecting shaft and the second connecting shaft are respectively located in the corresponding first connecting shaft guide long hole and the second connecting shaft guide long hole.

[0008] The fixed lock hook can be adjustably installed on the movable connecting seat, and the movable connecting seat is detachably connected to a connecting block. Both ends of the connecting block are respectively provided with hinged seats, one end of the connecting rod is installed on the hinged seat through a screw, and the other end of the connecting rod is provided with a connecting clamp.

[0009] The fixed lock hook is hinged and fixed on the movable connecting seat through a bolt. The fixed lock hook has a group of positioning convex teeth around the bolt circular array, and the movable connecting seat has a group of positioning tooth grooves matching the positioning convex teeth around the bolt circular array.

[0010] The connecting clamp is hingedly formed by a fixed clamp and a movable clamp. A locking handle is hinged on one side of the fixed clamp. An adjustable locking plate is provided at the end of the locking handle. A locking hook is provided at one end of the adjustable locking plate. A locking groove that cooperates with the locking hook is provided on the movable clamp.

[0011] A group of connecting screws are provided at the end of the locking handle, a group of connecting screw mounting holes are provided on the adjustable locking plate, the adjustable locking plate is installed on the group of connecting screws, and locking nuts are screwed on the connecting screws on both sides of the adjustable locking plate.

[0012] The advantages of this utility model are that the tractor and the wheelchair are split-type connected, which is easy to install and convenient for traveling long distances alone. The connecting device can be quickly connected and disconnected through the cooperation of the movable locking hook, the fixed locking hook and the corresponding locking rod. It is easy and quick to use, and effectively improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the structure of the utility model in a disassembled state.

[0015] Figure 3 It is a schematic diagram of the fixed locking seat structure.

[0016] Figure 4 It is a structural diagram of the movable connecting seat.

[0017] Figure 5 It is a schematic diagram of the connecting clamp structure.

[0018] Figure 6 It is a schematic diagram of the usage status structure. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill 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 represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the utility model is usually placed when in use. This is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. In addition, if the terms "first", "second", etc. appear in the description of the present invention, they are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0023] As shown in the accompanying drawings, the present invention includes a fixed locking seat 7 and a movable connecting seat 8. The front end of the fixed locking seat 7 is provided with a connecting sleeve 9 connected to the front of the vehicle, and the rear end of the fixed locking seat 7 is respectively provided with an upper locking rod 10 and a lower locking groove 11. The fixed locking seat 7 is respectively provided with an active locking hook 12 that cooperates with the open side of the lower locking groove 11 to lock, and a control lever 13 that controls the opening and closing of the active locking hook 12. The movable connecting seat 8 is respectively provided with a fixed locking hook 15 that cooperates with the upper locking rod 10 and a pair of connecting rods 16 connected to the wheelchair pillars. The fixed locking hook 15 is provided with a lower locking rod 17 that cooperates with the lower locking groove 11.

[0024] The tractor in this case includes a frame 1, on which are provided wheel hub motors 2 and batteries 3 for providing electrical energy to the wheel hub motors 2. A pair of handles 4 for controlling the direction of the wheel hub are provided at one end of the top of the frame 1. A connecting sleeve 5 is provided on the frame 1, and a head support frame 6 is provided on the connecting sleeve 5.

[0025] The bottom of the frame 1 is a fork structure for mounting the hub motor 2. The fork is equipped with a fender, and the front end of the fender is equipped with a headlight electrically connected to the battery 3. The right handlebar 4 is equipped with a power switch and a throttle and accelerator handle. The left handlebar 4 is equipped with a light switch and a horn switch, similar to the handlebar structure of existing electric bicycles.

[0026] The connecting sleeve 5 is movably connected to the frame 1, that is, when the frame 1 rotates, the connecting sleeve 5 is fixed. When the tractor is not connected to the wheelchair, the front support frame 6 can support the tractor.

[0027] The fixed locking seat 7 of this case is fixedly connected to the connecting sleeve 5 through the connecting sleeve 9, so when the entire front of the vehicle is turning, the connecting device is relatively fixed.

[0028] When the vehicle is in a state of being moved backward, the fixed locking seat 7 is lifted up as the vehicle frame 1 moves backward, and the lower locking rod 17 is inserted into the lower locking groove 11, and then the control lever 13 is released, and the movable locking hook 12 is reset. The hook head of the movable locking hook 12 is hung on the lower locking rod 17, and the lower locking groove 11 cooperates with the lower locking rod 17 to lock the lower locking rod 17. The fixed locking seat 7 and the movable connecting seat 8 can be quickly connected through the cooperation of the upper and lower locking hooks and the locking rod. When it is necessary to open the vehicle, the user only needs to pull the control lever 13 to open the movable lock hook 12 and then pull the upper portion of the vehicle frame 1 backwards to quickly remove the fixed lock hook 15 from the fixed locking seat 7 .

[0029] Furthermore, one side of the connecting sleeve 9 is open, and a connecting portion 20 is provided on the open side. A connecting positioning groove matching the connecting portion 20 is provided at the front end of the connecting sleeve 9. The connecting sleeve 9 is detachably mounted on the fixed locking seat 7 through a set of screws.

[0030] The connecting sleeve 9 is a metal piece with an opening that allows it to have a certain degree of elasticity. After being tightened by screws, it can be tightly clamped on the connecting sleeve 5. There are threaded holes on both sides of the fixed locking seat 7. A set of screws are screwed on both sides of the fixed locking seat 7. The corresponding connecting part 20 is provided with a screw positioning groove. The screws on both sides apply pressure to the connecting part 20 to control the tightening of the connecting sleeve 9.

[0031] Furthermore, the fixed locking seat 7 is provided with a plug-in positioning groove 23 that cooperates with the fixed locking hook 15, and the upper locking rod 10 is located in the plug-in positioning groove 23. There are two lower locking grooves 11 and two movable locking hooks 12, which are respectively located on both sides of the plug-in positioning groove 23. The two movable locking hooks 12 are connected by a first connecting shaft 24 and are hinged to the fixed locking seat 7 through a pin shaft. A tensioning spring 25 is provided between the first connecting shaft 24 and the fixed locking seat 7. The control lever 13 is hinged to the fixed locking seat 7 through a pin shaft. A second connecting shaft 26 is provided at one end of the bottom of the control lever 13, and a pull rod 27 connected to the first connecting shaft 24 is provided on the second connecting shaft 26.

[0032] When connecting, the front end of the entire fixed lock hook 15 can be inserted into the plug-in positioning groove 23, making the connection more stable. There are two lower locking grooves 11 and two movable lock hooks 12, and there are also two lower locking rods 17, which are located on both sides of the fixed lock hook 15. The two movable lock hooks 12 are connected by the first connecting shaft 24 and can move synchronously.

[0033] The two ends of the pull rod 27 are movably connected to the first connecting shaft 24 and the second connecting shaft 26 respectively. There are two tensioning springs 25, which are respectively located on both sides of the pull rod 27; the fixed locking seat 7 is respectively provided with a first connecting shaft guide long hole and a second connecting shaft guide long hole, and the first connecting shaft 24 and the second connecting shaft 26 are respectively located in the corresponding first connecting shaft guide long hole and the second connecting shaft guide long hole.

[0034] By default, the tension spring 25 pulls the first connecting shaft 24 upward, locking the movable hook 12 in the lower locking slot 11. When the control lever 13 is pulled rearward, the second connecting shaft 26 swings downward and forward. At this time, the pull rod 27 drives the first connecting shaft 24 to swing downward and rearward, and the hook head of the movable hook 12 moves upward to open from the open side of the lower locking slot 11. After releasing the control lever 13, the movable hook 12 automatically returns to its original position under the action of the tension spring 25. The presence of two tension springs 25 makes the swinging of the movable hooks 12 on both sides more stable.

[0035] Furthermore, the fixed locking hook 15 can be adjustably mounted on the movable connecting seat 8, and the movable connecting seat 8 is detachably connected to a connecting block 30, and both ends of the connecting block 30 are respectively provided with a hinge seat 31, one end of the connecting rod 16 is mounted on the hinge seat 31 through a screw, and the other end of the connecting rod 16 is provided with a connecting clamp 32.

[0036] A connecting block mounting groove is provided on the rear side of the movable connecting seat 8, and the connecting block 30 is inserted into the groove. The rear side of the movable connecting seat 8 is connected to an end cover through a screw for clamping the connecting block 30 on the movable connecting seat 8.

[0037] The connecting block 30 is a square structure, and the hinge seat 31 is horizontal, that is, the connecting rod 16 can only be adjusted in the horizontal direction on the hinge seat 31 to adjust the angle between the two connecting rods 16.

[0038] Furthermore, the fixed lock hook 15 is hinged and fixed to the movable connecting seat 8 by bolts. The fixed lock hook 15 has a group of positioning protruding teeth 33 around the bolt ring array, and the movable connecting seat 8 has a group of positioning tooth grooves matching the positioning protruding teeth 33 around the bolt ring array.

[0039] The orientation of the fixed lock hook 15 on the movable connection seat 8 can be adjusted as needed, and then locked by bolts. The cooperation between the positioning protruding teeth 33 and the positioning tooth grooves can effectively prevent the fixed lock hook 15 from rotating after locking.

[0040] Preferably, the connecting clamp 32 is hingedly formed by a fixed clamp 35 and a movable clamp 36, and a locking handle 37 is hingedly connected to one side of the fixed clamp 35. An adjustable locking plate 38 is provided at the end of the locking handle 37, and a locking hook is provided at one end of the adjustable locking plate 38. A locking groove that cooperates with the locking hook is provided on the movable clamp 36.

[0041] A group of connecting screws 40 are provided at the end of the locking handle 37, and a group of connecting screw mounting holes are provided on the adjustable locking plate 38. The adjustable locking plate 38 is installed on the group of connecting screws 40, and locking nuts 42 are screwed on the connecting screws 40 on both sides of the adjustable locking plate 38.

[0042] Installation and removal are quick and easy, and the connecting screw 40 and the locking nut 42 cooperate to adjust the size of the fixed snap ring 35 and the movable snap ring 36 according to the diameter of the wheelchair support rod.

[0043] During installation, anti-slip pads are provided on the inner sides of the fixed snap ring 35 and the movable snap ring 36 .

Claims

1. A wheelchair traction head connection device, characterized in that The invention comprises a fixed locking seat (7) and a movable connecting seat (8), wherein the front end of the fixed locking seat (7) is provided with a connecting sleeve (9) connected to the front of the wheelchair, and the rear end of the fixed locking seat (7) is provided with an upper locking rod (10) and a lower locking groove (11), respectively, and the fixed locking seat (7) is provided with a movable locking hook (12) matched with the opening side of the lower locking groove (11) and a control lever (13) for controlling the opening and closing of the movable locking hook (12), respectively, and the movable connecting seat (8) is provided with a fixed locking hook (15) matched with the upper locking rod (10) and a pair of connecting rods (16) connected to the wheelchair pillars, and the fixed locking hook (15) is provided with a lower locking rod (17) matched with the lower locking groove (11).

2. A wheelchair traction head connection device according to claim 1, characterized in that One side of the connecting sleeve (9) is open, and a connecting portion (20) is provided on the open side. A connecting positioning groove matching the connecting portion (20) is provided at the front end of the connecting sleeve (9). The connecting sleeve (9) is detachably mounted on the fixed locking seat (7) through a set of screws.

3. A wheelchair traction head connection device according to claim 1, characterized in that The fixed locking seat (7) is provided with a plug-in positioning groove (23) that matches the fixed locking hook (15), and the upper locking rod (10) is located in the plug-in positioning groove (23). The lower locking groove (11) and the movable locking hook (12) are both two and are respectively located on both sides of the plug-in positioning groove (23). The two movable locking hooks (12) are connected by a first connecting shaft (24) and are hinged to the fixed locking seat (7) by a pin shaft. A tensioning spring (25) is provided between the first connecting shaft (24) and the fixed locking seat (7). The control lever (13) is hinged to the fixed locking seat (7) by a pin shaft. A second connecting shaft (26) is provided at one end of the bottom of the control lever (13), and a pull rod (27) connected to the first connecting shaft (24) is provided on the second connecting shaft (26).

4. A wheelchair traction head connection device according to claim 3, characterized in that The two ends of the pull rod (27) are movably connected to the first connecting shaft (24) and the second connecting shaft (26), respectively. There are two tensioning springs (25), which are respectively located on both sides of the pull rod (27); the fixed locking seat (7) is provided with a first connecting shaft guide long hole and a second connecting shaft guide long hole, respectively. The first connecting shaft (24) and the second connecting shaft (26) are respectively located in the corresponding first connecting shaft guide long hole and the second connecting shaft guide long hole.

5. The wheelchair traction head connection device according to claim 1, characterized in that The fixed lock hook (15) is adjustably mounted on the movable connecting seat (8), and a connecting block (30) is detachably connected to the movable connecting seat (8). Both ends of the connecting block (30) are respectively provided with hinge seats (31). One end of the connecting rod (16) is mounted on the hinge seat (31) through a screw, and the other end of the connecting rod (16) is provided with a connecting clamp (32).

6. A wheelchair traction head connection device according to claim 5, characterized in that The fixed lock hook (15) is hinged and fixed to the movable connecting seat (8) through a bolt, and a group of positioning protruding teeth (33) are arranged around the bolt ring array on the fixed lock hook (15), and a group of positioning tooth grooves matching the positioning protruding teeth (33) are arranged around the bolt ring array on the movable connecting seat (8).

7. The wheelchair traction head connection device according to claim 5, characterized in that The connecting clamp (32) is formed by hingedly connecting a fixed clamp (35) and a movable clamp (36). A locking handle (37) is hingedly connected to one side of the fixed clamp (35). An adjustable locking plate (38) is provided at the end of the locking handle (37). A locking hook is provided at one end of the adjustable locking plate (38). A locking groove that matches the locking hook is provided on the movable clamp (36).

8. The wheelchair traction head connection device according to claim 7, characterized in that A group of connecting screws (40) is provided at the end of the locking handle (37), a group of connecting screw mounting holes is provided on the adjustable locking plate (38), the adjustable locking plate (38) is mounted on the group of connecting screws (40), and locking nuts (42) are screwed on the connecting screws (40) on both sides of the adjustable locking plate (38).

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