PRESS MECHANISM AND PRESSURE-REDUCING VALVE HAVING THE SAME

PROBLEM TO BE SOLVED: To provide a press mechanism capable of suppressing an abrasion accompanied with a slide of a piston and a pressure-reducing valve having the press mechanism.SOLUTION: A press mechanism 6 of a pressure-reducing valve includes: a bottomed cylindrical cylinder 51; a piston 52 sli...

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Bibliographische Detailangaben
Hauptverfasser: NAKANO SATORU, KUBO TOSHIKATSU, FUJIWARA EIJU
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a press mechanism capable of suppressing an abrasion accompanied with a slide of a piston and a pressure-reducing valve having the press mechanism.SOLUTION: A press mechanism 6 of a pressure-reducing valve includes: a bottomed cylindrical cylinder 51; a piston 52 slidably stored inside a cylinder 51; and a coil spring 53 arranged in a compressed state between a bottom part 62 of the cylinder 51 and the piston 52 and energizing the piston 52. Sit surfaces 82 and 84 on which end surfaces 81 and 83 of the coil spring 53 in the cylinder 51 and the piston 52 sit are in parallel with each other and formed inclined toward an orthogonal surface S orthogonal to an axial line L2 of the cylinder 51. The end surfaces 81 and 83 of the coil spring 53 are formed in a flat surface state orthogonal to the center axis L1. Each of inclined angles β and γ for the orthogonal flat surface S of the sit surfaces 82 and 84 is set so as to be equal to an orthogonal angle α between a resultant force Fc of the coil spring 53 and the center axis L1.SELECTED DRAWING: Figure 3 【課題】ピストンの摺動に伴う摩耗を抑制できる押圧機構及びこれを備えた減圧弁を提供する。【解決手段】減圧弁の押圧機構6は、有底円筒状のシリンダ51と、シリンダ51内に摺動可能に収容されたピストン52と、シリンダ51の底部62とピストン52との間に圧縮状態で配置されてピストン52を付勢するコイルバネ53とを備える。シリンダ51及びピストン52におけるコイルバネ53の端面81,83がそれぞれ着座する座面82,84は、平行になるとともに、シリンダ51の軸線L2と直交する直交平面Sに対して傾斜して形成される。コイルバネ53の端面81,83は、その中心軸L1に対して直交する平面状に形成される。座面82,84の直交平面Sに対する各傾斜角β,γは、コイルバネ53の合成力Fcと中心軸L1との交差角αと等しくなるように設定される。【選択図】図3