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1. (WO2017038577) CYLINDER DEVICE

Pub. No.:    WO/2017/038577    International Application No.:    PCT/JP2016/074651
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Aug 25 01:59:59 CEST 2016
IPC: F16F 9/53
F16F 9/32
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: TANABE, Umi
田邊 有未
KIMURA, Yusei
木村 夕成
Title: CYLINDER DEVICE
Abstract:
Provided is a cylinder device capable of reducing a torque received from a fluid. A middle cylinder 17 is provided between an outer cylinder 3 and an inner cylinder 2. Flow passages 18A, 18B, 18C, 18D in which an operating fluid 20, which is an electroviscous fluid, flows between the middle cylinder 17 and the inner cylinder 2 are formed on the middle cylinder 17. The flow passages 18A, 18B, 18C, 18D obliquely extend in the circumference of the middle cylinder 17, extend in a first oblique direction in some portions thereof, and extend in a second oblique direction opposite to the first oblique direction in the other portions thereof. Therefore, partition walls 21A, 21B, 21C, 21D are provided on the outer circumferential side of the inner cylinder 2. The partition walls 21A, 21B, 21C, 21D have first clockwise sections 21A1, 21B1, 21C1, 21D1, second clockwise sections 21A3, 21B3, 21C3, 21D3 which extend in the first oblique direction, and counterclockwise sections 21A2, 21B2, 21C2, 21D2 which extend in the second oblique direction.