A front connecting device of a wheelchair tractor

Abstract

A front connection device for a wheelchair tractor comprises a connection sleeve (10) connected to the front of the vehicle and an adjuster (15) adjustably connected to the connection sleeve (10); one end of the adjuster (15) is provided with a connection sleeve (16) detachably mounted on the connection sleeve (10); the other end of the adjuster (15) is rotatably provided with a connection shaft (17); both ends of the connection shaft (17) are symmetrically provided with connection rods (18); the connection rod (18) and the connection shaft (17) are movably connected via a pin; the end of the connection rod (18) is provided with a connection clamp (19) detachably mounted on a front support rod of the wheelchair; the utility model has the advantages that the opening angle of a pair of connection rods can be freely adjusted to fit the width of the wheelchair; at the same time, the adjuster can quickly and flexibly adjust the height of the pair of connection rods; the connection is convenient and quick; and the application range is wide.

Description

Technical Field

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

[0002] Hand-pushed wheelchairs have been widely used as a means of transportation for the sick, disabled, elderly and weak, but the range of movement of users is limited and they cannot travel long distances. The use environment of integrated electric wheelchairs is limited and not flexible enough. The traction device of the existing wheelchair tractor is fixed by a traction rod, the connection method is relatively fixed, the scope of application is limited, and the angle adjustment is not convenient enough. Utility Model Content

[0003] The purpose of the present utility model is to provide a front connecting device of a wheelchair tractor in view of the above-mentioned shortcomings.

[0004] The utility model comprises a connecting sleeve connected to the front of a wheelchair and an adjuster which is adjustably connected to the connecting sleeve, one end of the adjuster is provided with a connecting sleeve which is detachably mounted on the 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 connecting rods and the connecting shafts are movably connected through pins, the end of the connecting rod is provided with a connecting clamp which is detachably mounted on a front support rod of the wheelchair; an adjusting gear is provided on the connecting shaft in the adjuster, and a gear forward rotation locking plate, a gear backward rotation locking plate and a locking screw for fixing the gear backward rotation locking plate are respectively provided on the adjuster.

[0005] 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.

[0006] 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.

[0007] 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 threaded on the connecting screws on both sides of the adjustable locking plate.

[0008] A connecting seat is detachably mounted on the connecting sleeve, and a locking positioning slot is provided on the connecting seat, a vehicle head support frame is connected to the locking positioning slot, and a plug-in block is provided on the vehicle head support frame, which is mounted in the locking positioning slot and locked by a screw.

[0009] 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.

[0010] The utility model has the advantages that the opening angle of the pair of connecting rods can be freely adjusted and adapted according to the width of the wheelchair, and the adjuster can quickly and flexibly adjust the height of the pair of connecting rods, the connection is convenient and fast, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0012] Figure 2 It is a schematic diagram of the regulator structure.

[0013] Figure 3 It is a schematic diagram of the connecting clamp structure.

[0014] Figure 4 It is a schematic diagram of the structure of the front support frame.

[0015] Figure 5 It is a schematic diagram of the usage status structure. DETAILED DESCRIPTION

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] As shown in the accompanying drawings, the utility model includes a connecting sleeve 10 connected to the front of the wheelchair and an adjuster 15 adjustably connected to the connecting sleeve 10, one end of the adjuster 15 is provided with a connecting sleeve 16 detachably mounted on the connecting sleeve 10, the other end of the adjuster 15 is rotatably provided with a connecting shaft 17, both ends of the connecting shaft 17 are symmetrically provided with connecting rods 18, the connecting rod 18 and the connecting shaft 17 are movably connected through a pin shaft, and the end of the connecting rod 18 is provided with a connecting clamp 19 detachably mounted on the front support rod of the wheelchair; an adjusting gear 30 is provided on the connecting shaft 17 located in the adjuster 15, and a gear forward rotation locking plate 23, a gear backward rotation locking plate 24 and a locking screw 25 for fixing the gear backward rotation locking plate 24 are respectively provided on the adjuster 15.

[0021] One side of the connecting sleeve 16 is open, and a pair of locking screws are provided on the open side, and the height of the connecting sleeve 16 connected to the connecting sleeve 10 can be adjusted according to installation requirements.

[0022] The two connecting rods 18 are forked and used to connect the front support rods of the wheelchair, which will not affect the position of the user's legs. At the same time, one end of the connecting rod 18 is hinged on the connecting shaft 17, and the spacing between the two connecting rods 18 can be freely adapted according to the width of the wheelchair.

[0023] The two connecting rods 18 can rotate with the connecting shaft 17. When in use, the tractor is in a backward tilted state. Therefore, before installation, the connecting rods 18 can be adjusted to form a larger angle with the shock-absorbing frame, and then the two connecting rods 18 can be fixed to the front support rod of the wheelchair through the connecting clamps 19. The connecting rods 18 maintain a vertical angle with the front support rod of the wheelchair. After completion, you only need to push the entire shock-absorbing frame forward to quickly adjust the inclination angle of the shock-absorbing frame. In this case, the adjuster 15 is similar to a locking mechanism of a ratchet pawl. The gear forward rotation locking plate 23 is used to limit the connection shaft 17 to rotate forward (i.e., counterclockwise in the figure), and the gear rearward rotation locking plate 24 is used to limit the connection shaft 17 to rotate backward (i.e., clockwise in the figure). The locking screw 25 is used to press the gear rearward rotation locking plate 24 to limit the rotation of the connection shaft 17 in the backward direction.

[0024] Furthermore, the gear forward rotation locking plate 23 and the gear backward rotation locking plate 24 are both provided with locking protrusions that cooperate with the adjusting gear 30. The gear forward rotation locking plate 23 and the gear backward rotation locking plate 24 are both movably installed on the adjuster 15 through a pin shaft, and a torsion spring is provided at the connection between the gear forward rotation locking plate 23 and the adjuster 15.

[0025] That is, the gear forward rotation locking plate 23 automatically locks the adjusting gear 30 to rotate forward under the action of the torsion spring, and the gear backward rotation locking plate 24 needs to be pressed by the locking screw 25 to lock the adjusting gear 30 to rotate backward. Therefore, in actual use, the locking screw 25 is in a loose state during installation, that is, the gear backward rotation locking plate 24 does not contact the adjusting gear 30.

[0026] After the installation is completed, when the user pushes the tractor forward, the connecting shaft 17 rotates clockwise. After loosening, the gear forward locking plate 23 automatically locks the connecting shaft 17 to prevent it from rotating counterclockwise. At this time, the locking screw 25 is rotated to press the gear backward locking plate 24 downward to tighten the adjusting gear 30, and the connecting shaft 17 is locked in the clockwise direction. The entire installation is completed, and the connecting shaft 17 cannot rotate in both directions to ensure its safety during driving.

[0027] In the present case, the middle part of the gear forward rotation locking plate 23 is hinged on the regulator 15, and both ends extend to the outside of the regulator 15. The upper and lower sides of the regulator 15 are provided with avoidance holes for the gear forward rotation locking plate 23. Under the default condition, the part of the gear forward rotation locking plate 23 extending to the outside is opposed to the corresponding side wall of the avoidance hole, that is, the avoidance hole also limits the counterclockwise rotation position of the gear forward rotation locking plate 23.

[0028] Preferably, the connecting clamp 19 is hingedly formed by a fixed clamp 31 and a movable clamp 32, a locking handle 33 is hingedly connected to one side of the fixed clamp 31, an adjustable locking plate 35 is provided at the end of the locking handle 33, a locking hook is provided at one end of the adjustable locking plate 35, and a locking groove matching the locking hook is provided on the movable clamp 32.

[0029] A group of connecting screws 37 are provided at the end of the locking handle 33, and a group of connecting screw mounting holes are provided on the adjustable locking plate 35. The adjustable locking plate 35 is installed on the group of connecting screws 37, and locking nuts 38 are threadedly connected to the connecting screws 37 on both sides of the adjustable locking plate 35.

[0030] Installation and disassembly are quick and convenient, and the connecting screw 37 and the locking nut 38 cooperate to adjust the size of the fixed snap ring 31 and the movable snap ring 32 according to the diameter of the wheelchair support rod.

[0031] During installation, anti-slip pads are provided inside the fixed snap ring 31 and the movable snap ring 32 .

[0032] Furthermore, a connecting seat 40 is detachably mounted on the connecting sleeve 10, and a locking positioning slot is provided on the connecting seat 40, and a vehicle head support frame 11 is connected to the locking positioning slot, and a plug-in block 41 is provided on the vehicle head support frame 11, and the plug-in block 41 is installed in the locking positioning slot and locked by a screw.

[0033] The front support frame 11 is a U-shaped support frame, and anti-skid pads are respectively provided at both ends of the U-shaped support frame.

[0034] When parking, the front support frame 11 and the tractor are supported at three points, and the anti-skid pad can effectively prevent the tractor from slipping when parked on a relatively smooth ground indoors or outdoors.

[0035] The height of the front support frame 11 can be adjusted as required by adjusting the position of the connecting seat 40 on the connecting sleeve 10. By default, after the entire tractor is installed on the wheelchair, the front support frame 11 is not in contact with the ground, and the distance between the front support frame 11 and the ground should be maintained at not less than 100 mm to avoid the front support frame 11 from scraping the ground during use.

Claims

1. A front connection device for a wheelchair tractor, characterized in that The invention comprises a connecting sleeve (10) connected to the front of the wheelchair and an adjuster (15) adjustably connected to the connecting sleeve (10), one end of the adjuster (15) is provided with a connecting sleeve (16) detachably mounted on the connecting sleeve (10), the other end of the adjuster (15) is rotatably provided with a connecting shaft (17), both ends of the connecting shaft (17) are symmetrically provided with connecting rods (18), the connecting rod (18) and the connecting shaft (17) are movably connected via a pin, and the end of the connecting rod (18) is provided with a connecting clamp (19) detachably mounted on a front support rod of the wheelchair; an adjusting gear (30) is provided on the connecting shaft (17) located in the adjuster (15), and a gear forward rotation locking plate (23), a gear backward rotation locking plate (24), and a locking screw (25) for fixing the gear backward rotation locking plate (24) are respectively provided on the adjuster (15).

2. The front connecting device of a wheelchair tractor according to claim 1, characterized in that The gear forward rotation locking plate (23) and the gear backward rotation locking plate (24) are both provided with locking protrusions that cooperate with the adjusting gear (30), the gear forward rotation locking plate (23) and the gear backward rotation locking plate (24) are both movably mounted on the adjuster (15) via a pin shaft, and a torsion spring is provided at the connection between the gear forward rotation locking plate (23) and the adjuster (15).

3. The front connecting device of a wheelchair tractor according to claim 1, characterized in that The connecting clamp (19) is formed by hingedly connecting a fixed clamp ring (31) and a movable clamp ring (32). A locking handle (33) is hingedly connected to one side of the fixed clamp ring (31). An adjustable locking plate (35) is provided at the end of the locking handle (33). A locking hook is provided at one end of the adjustable locking plate (35). A locking groove matching the locking hook is provided on the movable clamp ring (32).

4. The front connecting device of a wheelchair tractor according to claim 3, characterized in that A group of connecting screws (37) is provided at the end of the locking handle (33), a group of connecting screw mounting holes is provided on the adjustable locking plate (35), the adjustable locking plate (35) is mounted on the group of connecting screws (37), and locking nuts (38) are screwed on the connecting screws (37) located on both sides of the adjustable locking plate (35).

5. The front connecting device of a wheelchair tractor according to claim 1, characterized in that A connecting seat (40) is detachably mounted on the connecting sleeve (10), and a locking and positioning slot is provided on the connecting seat (40), a head support frame (11) is connected to the locking and positioning slot, and a plug-in block (41) is provided on the head support frame (11), and the plug-in block (41) is mounted in the locking and positioning slot and locked by a screw.

6. The front connecting device of a wheelchair tractor according to claim 5, characterized in that The vehicle head support frame (11) is a U-shaped support frame, and anti-slip pads are respectively provided at both ends of the U-shaped support frame.

Images