Two-section four-track stair climbing wheelchair based on walking wheel swinging and upstairs and downstairs going method

Abstract

The invention discloses a two-section four-track stair climbing wheelchair based on walking wheel swinging and an upstairs and downstairs going method.The wheelchair comprises a wheelchair body, two large walking wheels and track stair climbing mechanisms.The wheelchair body is directly installed on and fixed to the track stair climbing mechanisms.The two large walking wheels are installed on the track stair climbing mechanisms through large wheel swing arm mechanisms.A hand-push wheelchair and the track stair climbing mechanisms are ingeniously combined together, the wheelchair does not need to be disassembled or assembled when walking on flat ground or going upstairs and downstairs, and travel application is more convenient.The designed track stair climbing mechanisms tilt forwards to the positions below a seat of the wheelchair, the wheelchair can smoothly pass through a stair half-storey platform just like the common hand-push wheelchair, and good corridor passing ability is achieved.The related large wheel swing arm mechanisms can prevent backward tilting when the wheelchair goes upstairs at reflex angles of stairs and prevent forward tilting when the wheelchair goes downstairs at the reflex angles, when the stairs are peacefully converted, gravity center transition is stable, the wheelchair can be in stable transition at the reflex angles of the stairs, and therefore the stair climbing wheelchair can be autonomously operated by a rider.

Description

technical field [0001] The invention relates to a stair-climbing wheelchair, in particular to a mechanical structure of a wheel-track compound stair-climbing wheelchair. Background technique [0002] The current four-wheeled wheelchair is an indispensable means of transportation for the elderly, infirm and those with lower limb disabilities. However, the four-wheeled wheelchair cannot go up and down stairs, which limits the scope of use. Wheelchair users living in buildings without elevators cannot go up and down stairs, which affects their Go out and participate in social activities. my country has rapidly entered an aging society, and the travel problems of the elderly have become increasingly prominent. [0003] In order to solve the problems referred to above, split and integrated wheel-track composite stair-climbing wheelchairs have appeared on the market. The split-type structure is to fix the ordinary wheelchair on the crawler for climbing stairs. For example, Chine...

AI Technical Summary

Problems solved by technology

[0005] 1. The stair-climbing wheelchair disclosed in Chinese patent CN201210590075.0, because the track can only be lifted or lowered as a whole, and cannot be folded, makes the front and rear dimensions of the wheelchair larger, resulting in poor passability of the wheelchair at the half-floor platform of the stairs

[0006] 2. The stair-climbing wheelchair disclosed in Chinese patent CN201320833460.3 has the large walking wheel installed in the front position, cannot be used on flat ground, and cannot be operated by the operator independently

[0007] 3. The stair-climbing wheelchair disclosed in Chinese patent CN201510048349.7 cannot pass through the obtuse angle (angle greater than 90 degrees and less than 180 degrees) and the reflex angle (angle greater than 180 degrees) of the stairs under the operator's own operation

[0008] 4. The stair-climbing wheelchair disclosed in Chinese patent 201510594011.1 has a complex structure, and does not mention the method of passing through the good angle of the stairway. The feasibility of the stair-climbing scheme is poor

[0009] 5. An Italian one-piece wheel-track composite stair-climbing wheelchair named "Explorer Stair Climbing Car" can climb stairs smoothly and flexibly and walk peacefully under the independent operation of the occupant, but it has more than 4 moving mechanisms, and the structure Complicated, bulky, and poor corridor passability, it is difficult to apply to ordinary residential buildings, and the cost is high, so it is not easy to promote and use

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