To provide a hydraulic pressure adjusting device which can properly adjust hydraulic pressure with respect to the different abnormal hydraulic pressure of working fluid.SOLUTION: A hydraulic pressure adjusting device 1 comprises; a first valve 4 which is valve-opened when the hydraulic pressure of working fluid in a first flow passage 22 reaches first hydraulic pressure or higher, and returns the working fluid in the first flow passage 22 to an oil tank T; a second valve 5 which is arranged in a valve body 41 of the first valve 4, valve-opened when the hydraulic pressure of a working fluid in a second flow passage 23 reaches second hydraulic pressure or higher, and returns the working fluid in the second flow passage 23 to the oil tank T; and a third valve 6 which is arranged in a valve body 51 of the second valve 5, valve-opened when the hydraulic pressure of the working fluid in the second flow passage 23 reaches third hydraulic pressure of higher, and returns the working fluid in the second flow passage 23 to the oil tank T. The third valve 6 is constituted so as to operate by receiving the hydraulic pressure of the working fluid in the second flow passage 23 through a small-diameter hole 51b which is formed at the valve body 51 of the second valve 5.SELECTED DRAWING: Figure 2
【課題】作動油の異なる異常油圧に対し油圧調整を適切に行うことができる油圧調整装置を提供すること。【解決手段】油圧調整装置1は、第一流路22における作動油の油圧が第一油圧以上となった場合に開弁して第一流路22の作動油をオイルタンクTに戻す第一弁4と、第一弁4の弁体41内に設けられ第二流路23における作動油の油圧が第二油圧以上となった場合に開弁して第二流路23の作動油をオイルタンクTに戻す第二弁5と、第二弁5の弁体51内に設けられ第二流路23における作動油の油圧が第三油圧以上となった場合に開弁して第二流路23の作動油をオイルタンクTに戻す第三弁6とを備え、第三弁6は、第二弁5の弁体51に形成される小径孔51bを通じ第二流路23における作動油の油圧を受けて作動するように構成されている。【選択図】図2
HYDRAULIC PRESSURE ADJUSTING DEVICE
油圧調整装置
2021-09-13
Patent
Electronic Resource
Japanese
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