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

Abstract

The invention discloses a double-section double-track stair-climbing wheelchair and a method for going up and down stairs based on the swing of walking wheels. Double crawler mechanism, the crawler mechanism on each side includes the front section of the mechanism, the rear section of the mechanism and the rubber crawler. The front section of the mechanism and the rear section of the mechanism are hinged through the load-bearing wheel shaft to form an integral mechanism with rubber crawlers. After the crawler climbing mechanism of the present invention is folded on the ground, the outer side of the crawler is supported by the crawler support bearing, and the crawler is in a slightly loose state, which is beneficial to prolong the service life of the crawler, and saves the need to repeatedly adjust the crawler tension when going up and down stairs without using the crawler for a long time. Tightening mechanism to remove the tension of the track.

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. [0004] The split-type structure is to fix the ordinary wheelchair on the crawler for climbing stairs. For examp...

AI Technical Summary

Problems solved by technology

[0006] 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

[0007] 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

[0008] 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

[0009] 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

[0010] 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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