Wheel-track combined wheelchair capable of climbing stairs

Abstract

The invention provides a wheel-track combined wheelchair capable of climbing stairs. The wheel-track combined wheelchair capable of climbing the stairs comprises a seat, tracks, a wheel set, two direct current motors, a seat leveling mechanism, wheel-track switching devices, a wheel-track hybrid power case, a manual and electric track switching mechanism, a control system and the like. The wheel-track switching devices are arranged on the two sides of the wheelchair, each wheel-track switching device is composed of a hand-cranking worm, a worm gear, a screw and a rocker, and a front wheel and a rear wheel are fixed on the two rockers respectively. The seat leveling mechanism is composed of a worm gear, a worm and a screw. The wheel-track hybrid power case internally comprises a track drive mechanism, a wheel type combined drive mechanism, a wheel-track power switching device and a pusher. A small motor drives gears and racks, and manual and electric switching of the tracks is achieved. According to the wheel-track combined wheelchair capable of climbing the stairs, switching of two walking modes through the wheels and the tracks can be achieved conveniently, track-type movement and wheel-type movement both can adopt motor drive and manual drive, and various requirements can be met.

Description

technical field [0001] The invention relates to a stair climbing wheelchair, in particular to a wheel-track combined stair climbing wheelchair. Background technique [0002] Wheelchairs are essential for people with handicapped lower limbs. In order to enable wheelchairs to go up and down stairs, several types of stair-climbing wheelchairs have appeared, mainly including planetary wheel type, crawler type, alternate support type, and wheel-track compound type. [0003] The structure of the planetary wheel stair-climbing wheelchair is relatively simple, but the center of gravity fluctuates greatly when climbing the ladder, and the comfort is poor. [0004] Since the tracked stair-climbing wheelchair has a center of gravity close to a straight line parallel to the slope of the steps, the movement is stable and the vibration is small. However, when driving on flat ground, the resistance is greater and turning is more difficult. [0005] Alternately supported stair-climbing wh...

AI Technical Summary

Problems solved by technology

Two motors drive the tracks and two motors drive the wheel sets, which is expensive

In terms of patents, the patent application number is 201220565833.9, and the patent titled "A New Wheel-Trail Composite Electric Wheelchair" also uses a wheel-track combination, but it cannot be driven by human power.

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