Double-section four-track stair-climbing wheelchair based on walking wheel swing and method for going up and down stairs

Abstract

The invention discloses a double-section four-track stair-climbing wheelchair based on the swing of walking wheels and a method for going up and down stairs. It comprises a wheelchair main body, two large walking wheels and a crawler-track stair-climbing mechanism; the wheelchair main body is directly installed and fixed on the crawler-track stair-climbing mechanism ; Two walking bull wheels are installed on the crawler climbing mechanism through the bull wheel swing arm mechanism. The invention ingeniously combines the push wheelchair with the crawler climbing mechanism, no matter whether it is walking on flat ground or going up and down stairs, it does not need to be disassembled and assembled, and it is more convenient to go out; the designed crawler climbing mechanism is tilted forward under the wheelchair seat, The wheelchair can smoothly pass through the half-floor platform of the stairs like an ordinary hand-pushed wheelchair, and has good corridor passability; the involved wheel swing arm mechanism can prevent backward leaning when going upstairs at the angle of the stairs, and prevent forward leaning when going downstairs , when the stairs are converted peacefully, the transition of the center of gravity is relatively stable, so that the wheelchair can transition smoothly at the angle of the stairs, so that the stair-climbing wheelchair can be operated independently by the occupant.

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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