Auxiliary standing wheelchair with variable front and rear wheel wheelbase

Abstract

The present invention discloses an auxiliary standing wheelchair with variable front and rear wheel wheelbase and belongs to the technical field of wheelchairs. The auxiliary standing wheelchair comprises a rear vehicle frame, a front vehicle frame, rear wheels, front wheels, a cushion assembly and a backrest assembly, the rear vehicle frame, the cushion assembly and a front frame extension arm form a set of a four-linkage-rod mechanism via a cushion auxiliary linkage rod, the cushion assembly and the cushion auxiliary linkage rod sequentially form another set of a four-linkage-rod mechanism via a backrest angle rocking arm and a backrest angle linkage rod, and an electric push rod used for driving rotation of the cushion assembly is arranged between a bottom part of the cushion assembly and the rear vehicle frame. The linkage of the two sets of the linkage-rod mechanisms realizes front wheel rear shifting when the wheelchair cushion and backrest are lifted up, assists the lifting-up of the wheelchair cushion to leave more front space, improves support of the wheelchair to patients when standing, and is convenient for adjustment of patients' standing postures and safer to use; andbesides, when the wheelchair restores a sitting posture, the front and rear wheelbase of the wheelchair is larger, and driving stability and safety of the wheelchair are improved.

Description

technical field [0001] The invention relates to a wheelchair, in particular to an auxiliary standing wheelchair with a variable wheelbase between front and rear wheels. Background technique [0002] A survey found that there are a large number of patients who are paralyzed or have limited mobility due to various traffic accidents and various diseases every year, and with the continuous improvement of the aging society, the number of elderly people with limited mobility is also increasing year by year. Most of these mobility-impaired patients and the elderly need to rely on wheelchairs to help them with their daily activities. [0003] At present, there are many kinds of wheelchairs on the market, and their functions are becoming more and more abundant. Most wheelchairs are improved or added new functions on the basis of ordinary wheelchairs, resulting in more and more complex structures and larger volumes of wheelchairs. bigger and bigger. Because the patient's legs are we...

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to overcome the disadvantages of poor standing stability of the existing wheelchair auxiliary standing mechanism, and provide an auxiliary standing wheelchair with a variable wheelbase between the front and rear wheels. The linkage realizes that the front wheels move backward when the wheelchair cushion and the backrest are lifted, assisting the upward lift of the wheelchair cushion and allowing more front space, so as

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