PROBLEM TO BE SOLVED: To provide a hydraulic shock absorber capable of improving reliability.SOLUTION: A hydraulic shock absorber 1a of the present invention comprises: a first expansion-side passage 15 communicating a rod-side oil chamber 2a with a reservoir chamber 5 and opened or closed by an expansion-side solenoid valve 17; a first contraction-side passage 31 communicating an opposite-to-rod-side oil chamber 2b with the reservoir chamber 5 and opened or closed by a contraction-side solenoid valve 35; a main expansion-side damping valve 25 provided in a second expansion-side passage 16 extending in parallel to the first expansion-side passage 15, applying a circulation resistance to a working fluid from the rod-side oil chamber 2a, and generating an expansion-side damping force; and a main contraction-side damping valve 36 provided in a second contraction-side passage 32 extending in parallel to the first contraction-side passage 31, applying a circulation resistance to the working fluid from the opposite-to-rod-side oil chamber 2b, and generating a contraction-side damping force. Therefore, the structure of the hydraulic shock absorber 1a is made simple and the reliability thereof can be improved.
【課題】信頼性を向上させる流体圧緩衝器を提供する。【解決手段】本流体圧緩衝器1aは、ロッド側油室2aとリザーバ室5とを連通して、伸側電磁弁17により開閉される第1伸側通路15と、反ロッド側油室2bとリザーバ室5とを連通して、縮側電磁弁35により開閉される第1縮側通路31と、第1伸側通路15と並列に延びる第2伸側通路16に設けられ、ロッド側油室2aからの作動流体に流通抵抗を付与して伸側減衰力を発生させる主伸側減衰弁25と、第1縮側通路31と並列に延びる第2縮側通路32に設けられ、反ロッド側油室2bからの作動流体に流通抵抗を付与して縮側減衰力を発生する主縮側減衰弁36と、を備えているので、構造が簡素化され、信頼性を向上させることができる。【選択図】図1
HYDRAULIC SHOCK ABSORBER
流体圧緩衝器
2015-09-03
Patent
Electronic Resource
Japanese
IPC: | F16F SPRINGS , Federn / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / B61F Untergestelle für Schienenfahrzeuge, z.B. Fahrgestellrahmen, Drehgestelle oder Anordnungen der Radsätze , RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES |