Stair-climbing wheelchair

Abstract

The invention relates to a stair-climbing wheelchair. The stair-climbing wheelchair comprises a chair and a traveling mechanism positioned below the chair and capable of climbing stairs, wherein a horizontal mechanism is arranged between the chair and the traveling mechanism, and comprises an upper push row fixedly connected with the chair, and a lower push row fixedly connected with the traveling mechanism, two connecting rods which are arranged oppositely are hinged between the upper push row and the lower push row, the upper push row, the lower push row and the two connecting rods form a connecting rod mechanism, and when the stair-climbing wheelchair climbs stairs, the lower push row inclines by a fixed angle, and the upper push row keeps horizontal. By taking the upper push row as a stander, the connecting rod mechanism has one degree of freedom, through the structural design of the connecting rod mechanism, when the lower push row inclines by a fixed angle, the upper push row keeps horizontal, so that the function that the chair keeps horizontal when the wheelchair climbs the stairs is achieved; the stair-climbing wheelchair is simple in structure, convenient to use, and easy to maintain, and the cost of the wheelchair is reduced.

Description

technical field [0001] The invention relates to a wheelchair for climbing stairs. Background technique [0002] At present, the common stair-climbing wheelchairs mainly include all-wheel type, crawler type, and star-wheel type. The all-wheel type wheelchair needs a special person to move the wheelchair when climbing stairs, which is very heavy and inconvenient and brings great discomfort to the occupants; There is a problem of bumps when going up and down stairs, and it is inconvenient to use on flat ground; the star-wheel wheelchair is more convenient when climbing stairs, but there will be a problem that the seat is not level. [0003] In order to keep the seat level during the stair climbing process, a hydraulic lifting mechanism and a drive system are usually used in the prior art, but there are problems of high cost and easy oil leakage. Contents of the invention [0004] The object of the present invention is to provide a low-cost stair-climbing wheelchair capable o...

AI Technical Summary

Problems solved by technology

[0002] At present, the common stair-climbing wheelchairs mainly include all-wheel type, crawler type, and star-wheel type. The all-wheel type wheelchair needs a special person to move the wheelchair when climbing stairs, which is very heavy and inconvenient and brings great discomfort to the occupants; The standard wheelchair has bumps when going up and down the stairs and it is inconvenient to use on flat ground; the star-wheel wheelchair is more convenient when climbing stairs, but there will be a problem that the seat is not level

[0003] In order to keep the seat level during the stair climbing process, hydraulic lifting mechanisms and drive systems are usually used in the prior art, but there are problems of high cost and easy leakage of oil

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