An omnidirectional mobile intelligent wheelchair bed

Abstract

The invention relates to an omni-directional mobile intelligent wheelchair bed, which is based on four-wheel omni-directional independent driving-steering platform, including seat frame, two side rails, four sets of independent suspension steering-drive wheel set and chassis. The seat frame consists of five parts: back, buttocks, legs, feet and side rails. Each part is driven by an electric motor,and the reciprocating motion of the push rod motor makes the bed shape automatically converted. The lateral push-rod motor mounted on the chassis and the side armrest constitute three links, which can only move in the vertical degree of freedom through the overconstraint of two sets of linear rails. The independent suspension steering-drive wheel set is composed of a suspension mechanism, a steering mechanism and a driving mechanism. The suspension mechanism plays a shock-absorbing effect through a four-bar linkage deformation compression shock absorber. The steering mechanism applies a driving force to the hub motor for changing the direction of travel. The drive mechanism controls the hub motor to provide forward driving force through the hub motor driver.

Description

technical field [0001] The invention is based on a four-wheel omnidirectional independent drive-steering platform, and is practically applied to an intelligent wheelchair bed for the elderly, the disabled and medical care. The intelligent wheelchair bed has the characteristics of flexibility, compactness, stable driving and all-round movement, and is suitable for movement on irregular ground and densely populated environments. Background technique [0002] Intelligent wheelchair bed is a research direction for the elderly, the disabled and medical care. Among the existing old-age care products for the disabled and medical care products, most of them are nursing beds and electric wheelchairs, and wheelchair beds are rare. The existing nursing beds have a deformation function to assist users. The driving force is divided into manpower and motor drive. However, the bed body driven by the motor is too large and needs the assistance of a nursing person when moving indoors, which...

AI Technical Summary

Problems solved by technology

Most of the existing wheelchair beds use unsuspended mecanum wheels, and then move in all directions. Due to the inherent characteristics of the mecanum wheels, they will cause slippage when starting and stopping. There will be gaps in the docking of the body; there are also some wheelchair beds that are driven by two wheels with inflatable wheels, but it needs to adjust the posture many times when docking with the ordinary bed body, which is inefficient. It will reduce user experience and does not meet the original design intention of service robots

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