Stable and comfortable wheel-crawler combined building-climbing wheelchair

Abstract

The invention discloses a stable and comfortable wheel-crawler combined building-climbing wheelchair. The stable and comfortable wheel-crawler combined building-climbing wheelchair comprises a wheelchair body and a wheeled mechanism for driving the wheelchair body to move. The two sides at the bottom of the wheelchair body are also provided with a caterpillar walking mechanism, which is a caterpillar rotating device for adjusting the angle of the caterpillar walking mechanism. The crawler rotating device is arranged at the rear end of the two crawler traveling mechanisms. The crawler rotatingdevice and the wheeled driving device are drivingly connected to drive the crawler traveling mechanism and the wheeled mechanism to move. The rear end of the caterpillar traveling mechanism is connected with the wheelchair body through the caterpillar rotating device so as to change the relative height of the caterpillar traveling mechanism and the wheeled mechanism. The rear end of the caterpillar walking mechanism is also provided with a rear wheel cushioning device to reduce the impact of the staircase on the wheelchair when descending. The invention can precisely adjust the crawler angle,so that the climbable building wheelchair can not only maintain the normal sitting posture of the human body in the process of ascending and descending stairs, but also can smoothly, comfortably and safely travel, and the stability of the mechanism is improved.

Description

technical field [0001] The invention belongs to the technical field of wheelchairs. More specifically, it relates to a stable and comfortable wheel-track composite stair-climbing wheelchair. Background technique [0002] Wheelchairs are an essential means of transportation for the elderly, the infirm and those with lower limb disabilities. However, with the increase in stair-like buildings, their range of activities has been greatly reduced, and their participation in society has been seriously affected. In order to improve the quality of life of these people, in addition to increasing the barrier-free design of their living environment, it will become necessary to develop wheelchairs that can go up and down stairs, easy to use, low in price, and reliable as soon as possible. [0003] Electric wheelchairs are transformed and upgraded on the basis of traditional manual wheelchairs, superimposed with high-performance power drive devices, intelligent control devices, batteries...

AI Technical Summary

Problems solved by technology

Among them, the structure of the planetary wheel type stair climbing wheelchair is relatively simple, but the center of gravity fluctuates greatly when climbing the ladder, and the comfort is poor; the track type stair climbing wheelchair has a stable movement and less vibration because the movement track of the center of gravity is close to a straight line parallel to the slope of the steps. It is small, but the resistance is large and turning is difficult when driving on flat ground; the alternating support stair-climbing wheelchair takes into account the advantages of stable climbing and more flexible driving on flat roads, but the structure is complex and the control requirements are high

[0004] However, most existing wheel-track compound wheelchairs use hydraulic jacks as the power to adjust the track. Although they can climb stairs automatically, the hydraulic system that provides the power to adjust the track angle cannot accurately adjust the angle of the track, and the cost of the hydraulic system is very high. Oil in the event of a leak can make the wheelchair work environment worse

In addition, the existing wheel-track composite wheelchairs do not consider the adjustment of the occupant's posture and center of gravity when climbing stairs, and when the wheelchair is going downhill or when the wheelchair is going downhill, the speed of the wheelchair is accelerated, and the rapid flip that may occur may cause the patient to fall. Inverting problems, affecting its safety and comfort in the process of climbing stairs

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