Vehicle-mounted wheelchair wheel lifting mechanism

Abstract

The utility model discloses a wheel lifting mechanism of a vehicle-mounted wheelchair. The wheel lifting mechanism comprises a motor, a transmission mechanism, a four-bar mechanism, wheels and a mounting base, a mounting base is arranged between the wheels, the four-bar mechanism is connected with the wheels, and a transmission mechanism is arranged on the surface of the mounting base; the transmission mechanism comprises a shell, a driving gear, a driven gear, a ratchet wheel, a left steering gear lever, a right steering gear lever, a deflector rod, a deflector rod arm and a limiting block. The driving levers are arranged on the two sides of the driving lever arm, and the left steering gear lever and the right steering gear lever are both arranged on the inner wall of the shell and make contact with the driving levers. The device is simple in mechanical structure and high in reliability; when the seat is used, the wheels are supported on the ground, a good buffering effect is achieved, and people having difficulty in moving can sit in the seat and stand up from the seat stably.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, specifically to a vehicle-mounted wheelchair wheel lifting mechanism. Background Technology

[0002] Cars have become an everyday necessity for ordinary families, and private vehicles have greatly improved people's travel convenience. However, for people with mobility impairments, getting in and out of a vehicle often requires standing up in the cramped space or being carried out. To improve the convenience of travel for people with mobility impairments, some welfare vehicles on the market now have seats that can rotate out of the door, solving the problem of cramped interior space making standing and being carried difficult. However, when the seat rotates out, the cantilever of the seat frame becomes excessively long. To maintain the stability of the seat when the person is sitting down and standing up, the cantilever strength usually needs to be increased, increasing the complexity of the seat frame structure and the difficulty of manufacturing and maintenance. Summary of the Invention

[0003] The purpose of this invention is to provide a wheelchair wheel lifting mechanism to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A vehicle-mounted wheelchair wheel lifting mechanism includes a motor, a transmission mechanism, a four-bar linkage, a wheel, and a mounting base;

[0006] A mounting base is provided between the wheels, the four-bar linkage connects the wheels, and a transmission mechanism is provided on the surface of the mounting base.

[0007] The transmission mechanism includes a housing, a drive gear, a driven gear, a ratchet, a left steering lever, a right steering lever, a lever, a lever arm, and a limit block;

[0008] The lever is located on both sides of the lever arm, and the left and right steering levers are both located on the inner wall of the housing, and both are in contact with the lever.

[0009] The limiting block is located inside the outer casing and contacts the rotated lever arm;

[0010] The driving gear, driven gear, and ratchet are all located inside the housing, and the driving gear is located on the surface of the ratchet.

[0011] The motor output is connected to a drive gear, which meshes with a driven gear. The drive gear and driven gear drive the four-bar linkage to move downwards.

[0012] Furthermore, the transmission mechanism includes a cover plate, a spring mounting post, a left spring, and a right spring.

[0013] Furthermore, both the left and right springs are mounted on the inner wall of the outer casing via spring mounting posts.

[0014] Furthermore, the outer casing is provided with a cover plate for sealing.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model has a simple mechanical structure and high reliability; it is easy for personnel to operate. When in use, the wheels support the ground, which plays a good cushioning role, and it is relatively stable for people with mobility impairments to sit in the seat and stand up from the seat. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the wheel lifting mechanism assembly of this utility model;

[0018] Figure 2 This is a schematic diagram of the wheel lifting mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the wheel raising and retracting (initial state) of this utility model;

[0020] Figure 4 This is a schematic diagram of the wheel landing of this utility model.

[0021] In the diagram: 1-Motor, 2-Transmission mechanism, 3-Four-bar linkage, 4-Wheelchair wheel, 5-Mounting base, 6-Outer shell, 7-Cover plate, 8-Driving gear, 9-Driven gear, 10-Ratchet, 11-Left steering lever, 12-Right steering lever, 13-Spring mounting post, 14-Left spring, 15-Right spring, 16-Lever, 17-Lever arm, 18-Limit block. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example 1:

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] A vehicle-mounted wheelchair wheel lifting mechanism includes a motor 1, a transmission mechanism 2, a four-bar linkage 3, a wheel 4, and a mounting base 5. The mounting base is provided between the wheels, the four-bar linkage connects the wheels, and the transmission mechanism is provided on the surface of the mounting base.

[0025] like Figure 2As shown, the transmission mechanism 2 is provided with a housing 6, a cover plate 7, a driving gear 8, a driven gear 9, a ratchet 10, a left steering lever 11, a right steering lever 12, a spring mounting post 13, a left spring 14, a right spring 15, a lever 16, a lever arm 17, and a limit block 18.

[0026] The lever 16 is located on both sides of the lever arm 17. The left turn lever 11 and the right turn lever 12 are both located on the inner wall of the housing 6, and both are in contact with the lever 16.

[0027] The limiting block 18 is located inside the housing 6 and contacts the rotated lever arm 17;

[0028] The driving gear 8, driven gear 9, and ratchet 10 are all located inside the housing 6, with the driving gear 8 located on the surface of the ratchet 10;

[0029] The output end of motor 1 is connected to drive gear 8, drive gear 8 meshes with driven gear 9, and drive gear 8 and driven gear 9 drive four-bar linkage 3 to move downward;

[0030] The left spring 14 and the right spring 15 are both mounted on the inner wall of the outer casing 6 via spring mounting posts 13.

[0031] like Figure 2 and Figure 4 As shown, moving the lever arm 17 to the right causes the lever 16 to rotate clockwise, pushing the left steering lever 11 to rotate clockwise. Simultaneously, the right steering lever 12 is pushed by the right spring 15, rotating clockwise against the lever 16. The lever arm 17 rotates to a certain angle and then contacts the limit block 18. At this point, the left steering lever 11 rotates out of the ratchet 10's teeth, and the right steering lever 12 rotates into the ratchet 10's teeth. The motor drives the drive gear 8 to rotate clockwise, which in turn drives the driven wheel 9 to rotate counterclockwise. The drive gear 8 and driven gear 9 drive the four-bar linkage 3 to move downwards, which in turn moves the wheel 4 downwards, thus achieving the function of lowering the wheel of the vehicle-mounted wheelchair. Similarly, moving the lever arm 17 to the left raises the wheel of the vehicle-mounted wheelchair to its initial state, and the wheel 4 returns to its original position.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle-mounted wheelchair wheel lifting mechanism, characterized in that, Includes a motor (1), a transmission mechanism (2), a four-bar linkage (3), wheels (4), and a mounting base (5); A mounting base (5) is provided between the wheels (4), the four-bar linkage (3) connects the wheels (4), and a transmission mechanism (2) is provided on the surface of the mounting base (5). The transmission mechanism (2) includes a housing (6), a drive gear (8), a driven gear (9), a ratchet (10), a left steering lever (11), a right steering lever (12), a lever (16), a lever arm (17), and a limit block (18). The lever (16) is located on both sides of the lever arm (17). The left steering lever (11) and the right steering lever (12) are both located on the inner wall of the outer casing (6) and are in contact with the lever (16). The limiting block (18) is located inside the outer shell (6) and contacts the rotated lever arm (17); The driving gear (8), driven gear (9), and ratchet (10) are all located inside the housing (6), and the driving gear (8) is located on the surface of the ratchet (10); The output end of the motor (1) is connected to the drive gear (8), and the drive gear (8) meshes with the driven gear (9). The drive gear (8) and the driven gear (9) drive the four-bar linkage (3) to move downward.

2. The wheelchair wheel lifting mechanism according to claim 1, characterized in that: The transmission mechanism (2) includes a cover plate (7), a spring mounting post (13), a left spring (14), and a right spring (15).

3. The wheelchair wheel lifting mechanism according to claim 2, characterized in that: The left spring (14) and the right spring (15) are both mounted on the inner wall of the outer casing (6) via spring mounting posts (13).

4. The wheelchair lifting mechanism according to claim 2, characterized in that: The outer casing (6) is provided with a cover plate (7) for sealing.

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