PROBLEM TO BE SOLVED: To provide a fluid-pressure master cylinder in which a return spring is provided between a retainer which is contacted with a piston and a stopper which is contacted with a wall part that faces a liquid chamber, formed in a cylinder body, from the opposite side of the piston, and a guide pin for regulating the maximum interval between the retainer and the stopper is arranged between the retainer and the stopper, which can reduce man-hours for assembling the guide pin to the stopper to reduce costs.SOLUTION: A long hole 38 extending long along one diameter line of a guide pin 36 is formed in a stopper 35, and an engagement part 39 which can switch between a state where the part can be inserted through the long hole 38 and a state where the part can be engaged with a surface facing a wall part 11a of the stopper 35, in response to turning of the guide pin 36 relative to the stopper 35 is provided at an end part, near the stopper 35, of the guide pin 36 restricted from moving relative to the retainer 34 in a direction along a shaft line of a cylinder hole 12.SELECTED DRAWING: Figure 1
【課題】ピストンに当接されるリテーナと、シリンダボディ内に形成される液圧室にピストンとは反対側から臨む壁部に当接されるストッパとの間に戻しばねが設けられ、リテーナおよびストッパ間の最大間隔を規制するガイドピンがリテーナおよびストッパ間に配設される液圧マスタシリンダにおいて、ガイドピンのストッパへの組み付け工数の低下を図り、コスト低減を可能とする。【解決手段】ストッパ35に、ガイドピン36の一直径線に沿って長く延びる長孔38が形成され、シリンダ孔12の軸線に沿う方向でのリテーナ34との相対移動が規制されたガイドピン36のストッパ35側の端部に、長孔38に挿通可能な状態ならびにストッパ35の壁部11aに臨む面に係合可能な状態をストッパ35に対するガイドピン36の回動に応じて切替え可能な係合部39が設けられる。【選択図】 図1
FLUID-PRESSURE MASTER CYLINDER
液圧マスタシリンダ
2017-08-24
Patent
Electronic Resource
Japanese
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |