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Electromechanical actuator limiting stroke circumferential anti-blocking structure

A technology of electromechanical actuator and buckle structure, which is applied in mechanical equipment, transmission, belt/chain/gear, etc. The effect of simplifying the matching relationship of components, simplifying the matching relationship of components, and preventing radial deformation

Inactive Publication Date: 2019-04-30
随州职业技术学院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional ball screw pair, a buffer pad is added between the ball screw and the ball nut to reduce the collision impact between the ball screw and the ball nut at the extreme transmission position. It is widely used, but the disadvantage of this solution is that the buffer pad is a passive anti-collision structure. When the system power failure or the closed-loop position control fails, the rigid collision between the inner end surface of the ball screw pair at the limit position of the electromechanical actuator and the end surface will be squeezed. The pressure will cause the deformation of the spiral raceway of the steel ball of the ball screw pair and the increase of the gap, reduce the precision of the screw transmission, and even cause the screw pair to be stuck and cause the loss of the function of the electromechanical actuator

Method used

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  • Electromechanical actuator limiting stroke circumferential anti-blocking structure

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] The working principle of the present invention is: as figure 1 As shown, the end face of the circumferential limit structure (position A, B) is attached to the contact end face between the ball screw 1 and the ball nut 2. By designing the length h1 and h2 of the protruding structure, the value is smaller than that of the ball screw pair lead Ph, so that the ball screw pair forms surface contact along the radial direction of the ball screw pair at the extreme position (L=0) and the effective contact area is the largest; at the same time, the circumferential limit end face (A, B position) design Along the radial direction of the ball screw pair, the force-bearing surface is along the normal plane of the circumferential tangent during contact, and there is no effective component force in the radial and axial directions of the ball screw pair, so that the ...

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Abstract

The invention discloses an electromechanical actuator limiting stroke circumferential anti-blocking structure. The structure is used for providing full-stroke and high-reliability transmission for anelectromechanical actuator controlled by air power; a clamping buckle structure and a clamping groove structure are correspondingly added between a ball screw rod and a ball nut, so that axial brokenend face rigid contact between the ball screw rod and the ball nut at the limit position is prevented; by means of cooperation with a ball, transmission is stable, the requirement of anti-blocking ofthe electromechanical actuator at the limit position is skillfully realized, the transmission reliability and the position control precision of a ball screw rod pair are improved.

Description

technical field [0001] The invention relates to a limit stroke circumferential anti-seize structure of an electromechanical actuator, which belongs to the electromechanical field. Background technique [0002] The ball screw pair is the core transmission component of the aerospace high-power electromechanical actuator, and its transmission reliability has an important impact on the reliability of the electromechanical actuator. In the traditional ball screw pair, a buffer pad is added between the ball screw and the ball nut to reduce the collision impact between the ball screw and the ball nut at the extreme transmission position. It is widely used, but the disadvantage of this solution is that the buffer pad is a passive anti-collision structure. When the system power failure or the closed-loop position control fails, the rigid collision between the inner end surface of the ball screw pair at the limit position of the electromechanical actuator and the end surface will be s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22
CPCF16H25/2214
Inventor 杨朝兴曹乾坤万辛夷
Owner 随州职业技术学院
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