Pedal mechanism for stair-oriented motion type stair-climbing wheelchair

Abstract

The invention discloses a pedal mechanism for a stair-oriented motion type stair-climbing wheelchair. The pedal mechanism is characterized by comprising a lifting mechanism and a limiting adjusting mechanism; the lifting mechanism comprises a pedal, a pedal angle limiting pin, a pedal height adjusting rod, a left rail for clamping slot, a rack, a gear, a motor, a worm gear reducer, a right rail for clamping slot, a frame connecting rod, a pedal adjusting frame, a pedal height adjusting hole, a pedal clamping slot, a pedal connecting rod and a pedal angle adjusting hole; the limiting adjusting mechanism comprises a seat connecting block, a first torsion spring, a first rotating shaft, a first limiting pin, a fork stirring rod, a second rotating shaft, a third rotating shaft, a second torsion spring, a second limiting pin, a first connecting rod, a second connecting rod and a bracket slide slot. The pedal mechanism is used for solving the interference problem of the pedal and stair step when the wheelchair is faced to the stair and goes upstairs and downstairs; the pedal mechanism can face to the stair and go upstairs and downstairs; the pedal mechanism has the characteristics of flexible motion, high safety, high stability, low cost and convenience in operation.

Description

technical field [0001] The invention relates to the field of mechanical design, in particular to a pedal mechanism of a stair-climbing wheelchair that faces the movement of stairs. Background technique [0002] With the advent of an aging society and the increase in the number of disabled people, wheelchairs play an increasingly important role in the lives of the elderly and disabled people. Stairs that can be seen everywhere in life limit the use of ordinary wheelchairs. Therefore people have successively developed various wheelchairs for climbing stairs. But these wheelchairs have a common defect-the occupant of the stair-climbing wheelchair faces the forward direction when climbing the stairs, instead of facing the direction of stairs that we are used to in wheelchairs. This increases the blind spot of the occupant, so that the occupant cannot observe the terrain very conveniently, and then greatly increases the unsafe factors of the wheelchair climbing process, and redu...

AI Technical Summary

Problems solved by technology

The mechanism descends in a horizontal posture under a certain pressure until it touches the ground and stops. After the pressure is eliminated or reduced, it will automatically rise and reset. However, this mechanism can only make the pedals rise or fall in a horizontal posture, which cannot meet the needs of stair climbing wheelchairs. Requirements for the use of pedals in the face of stair climbing

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