Obstacle avoidance universal wheel for a wheelchair

Abstract

The invention discloses an obstacle avoidance universal wheel for a wheelchair, The wheel comprises a connecting plate, and a protective plate is arranged on the inner side of the top end of the connecting plate; a telescopic spring is mounted between the protective plate and the inner wall of the top end of the connecting plate; rollers are arranged on the inner side of the connecting plate; a gap is formed between the rollers and the protective plate; the surface of the protection plate is of an arc-shaped structure, a groove is formed in the surface of the protection plate, a hook is arranged on the inner side of the groove, the bottom end of a telescopic spring is wound on the inner side of the hook in a bent mode, connecting threads are formed in the surface of the bottom of the hook,and the hook is fixedly connected with the inner wall of the groove through the connecting threads. By means of the designed protective plate, when the shock absorption amplitude is too large, the wheel and the connecting plate can be separated, damage caused by collision of the wheel and the connecting plate is avoided, the designed hook can be replaced in long-time use, the situation that the protection plate cannot conduct protection due to long-time abrasion is avoided, and normal use is not affected.

Description

technical field [0001] The invention belongs to the technical field of universal wheels, and in particular relates to an obstacle-avoiding universal wheel for meritorious wheelchairs. Background technique [0002] The universal wheel is the so-called movable caster, and its structure allows horizontal 360-degree rotation. Casters are a general term, including movable casters and fixed casters. Fixed casters have no rotating structure and cannot be rotated horizontally but can only be rotated vertically. Therefore, they have a wide range of applications and are also used in wheelchairs. [0003] Although the existing obstacle-avoiding universal wheels can achieve the effect of shock absorption by changing the center position of the universal wheels when in use, in actual use, once the shock-absorbing amplitude is too large, it is easy to cause the universal wheels and the connection The collision between the boards will affect the ride comfort. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an obstacle-avoiding universal wheel for a meritorious wheelchair, so as to solve the problem that the existing obstacle-avoiding universal wheel proposed in the above-mentioned background technology can achieve shock absorption by changing the center position of the universal wheel when it is in use. effect, but in actual use, once the shock absorber range is too large, it is easy to cause collision between the universal wheel and the connecting plate, thus affecting the ride comfort

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