Active vibration damper and method for manufacturing active vibration damper

Abstract

Provided is an active vibration damper having a new structure, which can respond to demands such as the change of an additional mass body without the need for great design change, suppress the change of the spring characteristic caused by the change of the additional mass body, dimension error, and the like, and achieve stabilization of the sealing function of a housing. Also provided is a method for manufacturing the same. A linear actuator (12) is configured to be able to operate alone by providing an inner shaft part (40) in a movable element (16), providing an outer cylinder part (18) in a stator (14), and elastically linking both sides in the axial direction of the inner shaft part (40) and the outer cylinder part (18) by a pair of leaf springs (42, 44). The inner shaft part (40) and the outer cylinder part (16) are linked by elastic link rubber (48), and a mass body affixing part (75) for attaching an additional mass body (76) disposed outside the elastic link rubber (48) is provided to the inner shaft part (40). A housing (66) is formed on the outer peripheral side of the elastic link rubber (48) so as to have an axially split structure in which respective openings are secured to each other with an annular seal (58) interposed therebetween.

Description

technical field [0001] The present invention relates to an active vibration absorber including an actuator for generating a vibration force and for actively reducing vibration of a vibration-damping object member, and a method for manufacturing the active vibration absorber. Background technique [0002] Conventionally, as a device for reducing the vibration of a member to be damped such as an automobile body, an active-type damper is known in addition to a driven-type damper, that is, a dynamic damper. For example, as described in Japanese Unexamined Patent Application Publication No. 2008-2551 (Patent Document 1), an active damper includes an actuator for generating a vibrating force, and is used to positively or even cancel the vibration of the vibration damping target member. the damping effect. [0003] However, in an active damper, resonance action is utilized in order to exhibit a target damping effect with excellent energy efficiency. Specifically, as described in ...

AI Technical Summary

Problems solved by technology

However, since the case is divided at a portion close to each other in the axial direction, such as the additional mass body and the elastic connecting rubber, there is a problem that the structure of the case is complicated and it is difficult to ensure the sealing of the case.

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