Fluid-pressure actuator

Abstract

In order to improve its durability, a fluid-pressure actuator is constructed from a swelling / contraction body having opposite ends closed by plug members and swelling and contracting when liquid is supplied to and discharged from the body; a cover body for covering the outer peripheral surface of the expansion / contraction body and having its opposite ends fastened and fixed to the plug members; a fluid supply / discharge opening formed in the plug members; and an auxiliary member for preventing or suppressing local deformation in which the cover body swells outward when the fluid is supplied to the swelling / contraction body.

Description

technical field [0001] The present invention relates to a fluid pressure actuator driven by the supply and discharge of fluid such as air. Background technique [0002] In recent years, it has been proposed to use elastic expansion bodies (hereinafter referred to as fluid pressure actuators) described in Patent Document 1 to Patent Document 3 as drive sources for machines. [0003] In conventional fluid pressure actuators, for example, in air actuators, the outer periphery of a rubber tube is covered with a non-stretchable mesh covering, and the tube is expanded by supplying air. , so that the diameter of the coating can be increased. The increase in the diameter of the covering body causes a reduction in the length dimension, and a driving force is generated by the reduction in length. [0004] Patent Document 1: Japanese Patent Application Laid-Open No. 7-24771 [0005] Patent Document 2: Japanese Patent Application Laid-Open No. 2002-103270 [0006] Patent Document 3:...

AI Technical Summary

Problems solved by technology

If the tube breaks, the supplied air leaks out of the tube and the function of the pneumatic actuator is impaired

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