Wheelchair tractor

Abstract

A wheelchair tractor comprises a tractor frame (1), a hub motor (2) and a battery (3) for providing electric energy for the hub motor (2) are arranged on the tractor frame (1), a pair of handles (4) for controlling the direction of a hub are arranged at one end of the top of the tractor frame (1), a connecting sleeve (5) is arranged on the tractor frame (1), and a tractor head supporting frame (6) and a tractor head connecting device (7) connected with a wheelchair front supporting rod are arranged on the connecting sleeve (5). The electric wheelchair has the advantages that the tractor and the wheelchair are connected in a split mode, installation is convenient, independent long-distance traveling is facilitated, the tractor is of a folding structure, carrying is convenient, meanwhile, the tractor can be independently placed after being detached, and use is flexible.

Description

Technical Field

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

[0002] Manual wheelchairs have been widely used as a means of transportation for the sick, disabled, elderly and weak, but the user's range of movement is limited and long-distance travel is impossible. The integrated electric wheelchair has certain restrictions on the use environment and is not flexible enough. Utility Model Content

[0003] The purpose of the present utility model is to provide a wheelchair tractor to solve the above-mentioned deficiencies.

[0004] The utility model comprises a frame, on which a wheel hub motor and a battery for providing electric energy to the wheel hub motor are respectively arranged, a pair of handles for controlling the direction of the wheel hub are arranged at one end of the top of the frame, a connecting sleeve is arranged on the frame, and a front support frame and a front connection device connected with a front support rod of the wheelchair are respectively arranged on the connecting sleeve.

[0005] The front connection device includes an adjuster, one end of which is provided with a connecting sleeve that can be detachably mounted on a connecting sleeve, the other end of the adjuster is rotatably provided with a connecting shaft, both ends of the connecting shaft are symmetrically provided with connecting rods, the end of the connecting rod is provided with a connecting clamp that can be detachably mounted on a front support rod of the wheelchair; an adjusting gear is provided on the connecting shaft located in the adjuster, and a gear forward rotation locking plate, a gear rearward rotation locking plate and a locking screw for fixing the gear rearward rotation locking plate are respectively provided on the adjuster.

[0006] The gear forward rotation locking plate and the gear backward rotation locking plate are both provided with locking protrusions that cooperate with the adjusting gear. The gear forward rotation locking plate and the gear backward rotation locking plate are both movably installed on the adjuster through a pin shaft, and a torsion spring is provided at the connection between the gear forward rotation locking plate and the adjuster.

[0007] The connecting rod and the connecting shaft are movably connected via a pin shaft.

[0008] The connecting clamp is hingedly formed by a fixed clamp and a movable clamp, a locking handle is hingedly provided 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, and a locking groove matching the locking hook is provided on the movable clamp.

[0009] 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 threadedly connected to the fixed screws on both sides of the adjustable locking plate.

[0010] A connecting seat is detachably mounted on the connecting sleeve, and a locking and positioning slot is provided on the connecting seat. A plug-in block is provided on the vehicle head support frame, and the plug-in block is mounted in the locking and positioning slot and locked by a screw.

[0011] The front support frame is a U-shaped support frame, and both ends of the U-shaped support frame are respectively provided with anti-slip pads.

[0012] The frame is a foldable frame, which is hinged by an upper and lower part, and a locking piece is provided at the hinge. The connecting sleeve is installed on the lower half of the foldable frame. The upper half of the foldable frame is a hollow tube. The handle support column is movably inserted into the hollow tube and locked by a clamp.

[0013] The utility model has the advantages that the tractor and the wheelchair are connected in a split type, which is easy to install and convenient for long-distance travel alone; the tractor is a foldable structure, which is easy to carry and can be placed independently after being disassembled, so it is flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the structure of the vehicle head connection device.

[0016] Figure 3 It is a schematic diagram of the regulator structure.

[0017] Figure 4 It is a schematic diagram of the connecting clamp structure.

[0018] Figure 5 It is a schematic diagram of the structure of the front support frame.

[0019] Figure 6 It is a schematic diagram of the usage status structure. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the embodiments of the present utility model, 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 drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, if the terms "first", "second", etc. appear in the description of the present utility model, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] As shown in the accompanying drawings, the utility model includes a frame 1, on which are respectively provided a wheel hub motor 2 and a battery 3 for providing electrical energy to the wheel hub motor 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 front support frame 6 and a front connecting device 7 connected to the front support rod of the wheelchair are respectively provided on the connecting sleeve 5.

[0025] The bottom of the frame 1 is a fork frame structure for mounting the hub motor 2, a mudguard is provided on the fork frame, and a headlight electrically connected to the battery 3 is provided at the top of the front end of the mudguard; a power switch and a throttle speed accelerator handle are provided on the right handle 4. A headlight switch and a horn switch are provided on the left handle 4, which are the same as the handle 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] Furthermore, in the present case, both handles 4 are provided with a hand brake for braking the wheel hub of the hub motor 2 .

[0028] The battery 3 is detachably mounted on the vehicle frame 1 for easy replacement. The battery 3 is used to supply power to various electronic devices on the tractor.

[0029] Preferably, the front connecting device 7 includes an adjuster 8, one end of which is provided with a connecting sleeve 9 that can be detachably mounted on the connecting sleeve 5, and the other end of the adjuster 8 is rotatably provided with a connecting shaft 10, and the two ends of the connecting shaft 10 are symmetrically provided with connecting rods 11, and the end of the connecting rod 11 is provided with a connecting clamp 12 that can be detachably mounted on the front support rod of the wheelchair; an adjusting gear 13 is provided on the connecting shaft 10 located in the adjuster 8, and a gear forward rotation locking plate 15, a gear backward rotation locking plate 16 and a locking screw 17 for fixing the gear backward rotation locking plate 16 are respectively provided on the adjuster 8.

[0030] One side of the connecting sleeve 9 is open, and a pair of locking screws are provided on the open side, and the height at which the connecting sleeve 5 is connected can be adjusted according to installation requirements.

[0031] The two connecting rods 11 are distributed in a fork shape and are used to connect the front support rods of the wheelchair without affecting the placement of the user's legs.

[0032] The two connecting rods 11 can rotate with the connecting shaft 10. When in use, the tractor is in a backward tilted state. Therefore, before installation, the connecting rods 11 can be adjusted to form a larger angle with the frame 1, and then the two connecting rods 11 are fixed to the front support rods of the wheelchair through the connecting clamps 12. The connecting rods 11 maintain a vertical angle with the front support rods of the wheelchair. After completion, you only need to push the entire frame 1 forward to quickly adjust the inclination angle of the frame 1. In this case, the adjuster 8 is similar to a locking mechanism of a ratchet pawl. The gear forward rotation locking plate 15 is used to limit the connection shaft 10 to rotate forward (i.e., counterclockwise in the figure), and the gear rearward rotation locking plate 16 is used to limit the connection shaft 10 to rotate backward (i.e., clockwise in the figure). The locking screw 17 is used to press the gear rearward rotation locking plate 16 to limit the connection shaft 10 to rotate in the backward direction.

[0033] Specifically, the gear forward rotation locking plate 15 and the gear backward rotation locking plate 16 are both provided with locking protrusions that cooperate with the adjusting gear 13. The gear forward rotation locking plate 15 and the gear backward rotation locking plate 16 are both movably installed on the adjuster 8 through a pin shaft, and a torsion spring is provided at the connection between the gear forward rotation locking plate 15 and the adjuster 8.

[0034] That is, the gear forward rotation locking plate 15 automatically locks the adjusting gear 13 to rotate forward under the action of the torsion spring, and the gear backward rotation locking plate 16 needs to be pressed by the locking screw 17 to lock the adjusting gear 13 to rotate backward. Therefore, in actual use, the locking screw 17 is in a loosened state during installation, that is, the gear backward rotation locking plate 16 does not contact the adjusting gear 13.

[0035] After the installation is completed, when the user pushes the upper part of the frame 1 forward, the connecting shaft 10 rotates clockwise. After loosening, the gear forward locking plate 15 automatically locks the connecting shaft 10 to prevent it from rotating counterclockwise. At this time, the locking screw 17 is rotated to press the gear backward locking plate 16 downward to adjust the gear 13, and the connecting shaft 10 is locked in the clockwise direction. The entire installation is completed, and the connecting shaft 10 cannot rotate in both directions to ensure its safety during driving.

[0036] In the present case, the middle part of the gear forward rotation locking plate 15 is hinged on the regulator 8, and both ends extend to the outside of the regulator 8. The upper and lower sides of the regulator 8 are provided with avoidance holes for the gear forward rotation locking plate 15. Under the default condition, the part of the gear forward rotation locking plate 15 extending to the outside is opposed to the side wall of the corresponding avoidance hole, that is, the avoidance hole also limits the counterclockwise rotation position of the gear forward rotation locking plate 15.

[0037] Furthermore, the connecting rod 11 and the connecting shaft 10 are movably connected via a pin, so as to adapt to the distance between the two front support rods of different models of wheelchairs.

[0038] Preferably, the connecting clamp 12 is hingedly formed by a fixed clamp 18 and a movable clamp 19, a locking handle 20 is hingedly connected to one side of the fixed clamp 18, an adjustable locking plate 21 is provided at the end of the locking handle 20, a locking hook is provided at one end of the adjustable locking plate 21, and a locking groove matching the locking hook is provided on the movable clamp 19.

[0039] A group of connecting screws 22 are provided at the end of the locking handle 20, and a group of connecting screw mounting holes are provided on the adjustable locking plate 21. The adjustable locking plate 21 is installed on the group of connecting screws 22, and locking nuts 23 are threadedly connected to the fixed screws 22 on both sides of the adjustable locking plate 21.

[0040] Installation and disassembly are quick and convenient, and the fixed screw 22 and the locking nut 23 cooperate to adjust the size of the fixed snap ring 18 and the movable snap ring 19 according to the diameter of the wheelchair support rod.

[0041] During installation, anti-skid pads are provided inside the fixed snap ring 18 and the movable snap ring 19 .

[0042] Furthermore, a connecting seat 25 is detachably mounted on the connecting sleeve 5, and a locking and positioning slot is provided on the connecting seat 25. A plug-in block 26 is provided on the front support frame 6, and the plug-in block 26 is installed in the locking and positioning slot and locked by a screw.

[0043] The height of the front support frame 6 can be adjusted according to the needs by adjusting the position of the connecting seat 25 on the connecting sleeve 5. By default, after the entire tractor is installed on the wheelchair, the front support frame 6 does not contact the ground, and the distance between the front support frame 6 and the ground should be maintained at not less than 100 mm to avoid the front support frame 6 from scraping the ground during use.

[0044] Furthermore, the front support frame 6 is a U-shaped support frame, and anti-skid pads are respectively provided at both ends of the U-shaped support frame. When parking, the front support frame 6 and the wheel hub are parked in a three-point support manner. Combined with the anti-skid pads, it can effectively prevent the tractor from slipping when parked on a relatively smooth ground indoors or outdoors.

[0045] Preferably, the frame 1 is a foldable frame, which is formed by hinged upper and lower parts, and a locking piece 28 is provided at the hinge. The connecting sleeve 5 is installed on the lower half of the foldable frame, and the upper half of the foldable frame is a hollow tube. The handle 4 support column is movably inserted into the hollow tube and locked by a clamp.

[0046] The volume of the tractor can be effectively reduced during transportation and consignment, and the height of the handle 4 can be adjusted according to the user's habits.

Claims

1. A wheelchair tractor, characterized in that The wheelchair comprises a frame (1), the frame (1) is provided with wheel hub motors (2) and batteries (3) for providing electric energy to the wheel hub motors (2), a pair of handles (4) for controlling the direction of the wheel hubs are provided at one end of the top of the frame (1), the frame (1) is provided with a connecting sleeve (5), and the connecting sleeve (5) is provided with a front support frame (6) and a front connection device (7) connected to a front support rod of the wheelchair; The front connecting device (7) comprises an adjuster (8), one end of the adjuster (8) is provided with a connecting sleeve (9) which is detachably mounted on a connecting sleeve (5), the other end of the adjuster (8) is rotatably provided with a connecting shaft (10), both ends of the connecting shaft (10) are symmetrically provided with connecting rods (11), and the end of the connecting rod (11) is provided with a connecting clamp (12) which is detachably mounted on a front support rod of the wheelchair; an adjusting gear (13) is provided on the connecting shaft (10) located in the adjuster (8), and a gear forward rotation locking plate (15), a gear backward rotation locking plate (16), and a locking screw (17) for fixing the gear backward rotation locking plate (16) are respectively provided on the adjuster (8).

2. A wheelchair tractor according to claim 1, characterized in that The gear forward rotation locking plate (15) and the gear backward rotation locking plate (16) are both provided with locking protrusions that cooperate with the adjusting gear (13), the gear forward rotation locking plate (15) and the gear backward rotation locking plate (16) are both movably mounted on the adjuster (8) via a pin shaft, and a torsion spring is provided at the connection between the gear forward rotation locking plate (15) and the adjuster (8).

3. A wheelchair tractor according to claim 1, characterized in that The connecting rod (11) and the connecting shaft (10) are movably connected via a pin.

4. A wheelchair tractor according to claim 1, characterized in that The connecting clamp (12) is formed by hingedly connecting a fixed clamp ring (18) and a movable clamp ring (19). A locking handle (20) is hingedly connected to one side of the fixed clamp ring (18). An adjustable locking plate (21) is provided at the end of the locking handle (20). A locking hook is provided at one end of the adjustable locking plate (21). A locking groove matching the locking hook is provided on the movable clamp ring (19).

5. A wheelchair tractor according to claim 4, characterized in that A group of connecting screws (22) is provided at the end of the locking handle (20), a group of connecting screw mounting holes is provided on the adjustable locking plate (21), the adjustable locking plate (21) is mounted on the group of connecting screws (22), and locking nuts (23) are screwed onto the connecting screws (22) located on both sides of the adjustable locking plate (21).

6. The wheelchair tractor according to claim 1, characterized in that A connecting seat (25) is detachably mounted on the connecting sleeve (5), and a locking and positioning slot is provided on the connecting seat (25). A plug-in block (26) is provided on the vehicle head support frame (6), and the plug-in block (26) is mounted in the locking and positioning slot and locked by a screw.

7. A wheelchair tractor according to claim 6, characterized in that The vehicle head support frame (6) is a U-shaped support frame, and anti-slip pads are respectively provided at both ends of the U-shaped support frame.

8. The wheelchair tractor according to claim 1, characterized in that The frame (1) is a foldable frame, which is formed by hinged upper and lower parts, and a locking piece (28) is provided at the hinge. The connecting sleeve (5) is installed on the lower half of the foldable frame, and the upper half of the foldable frame is a hollow tube. The handlebar (4) support column is movably inserted into the hollow tube and locked by a clamp.

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