PRESSURE BUFFER DEVICE AND CHANNEL FORMING MEMBER

• Main Author: SENO NAOKI
• Format: Patent
• Language: English; Japanese
• Published: 31.08.2017
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To easily manufacture a channel forming part of a pressure buffer device.SOLUTION: A hydraulic pressure buffer device comprises: a first cylinder for accommodating oil: a piston body 30 in which a pressure-side oil passage 311 where oil flows accompanied with relative movement of a piston rod of the first cylinder in an axial direction with respect to the cylinder: and a pressure-side attenuation valve for opening and closing a pressure-side oil passage 311 of the piston body 30. The piston body 30 has: a first outside round part 33 which is formed into an annular shape, protrudes in an axial direction, and comes into contact with the pressure-side attenuation valve; and an annular protrusion 38 which protrudes to a side opposite to the first outside round part 33 in the axial direction, whose end part in the axial direction is located more on the outside in a radial direction from the first outside round part 33, and has a first inside inclined part 38T1 inclined with respect to the axial direction at least at a part thereof at the inside in the radial direction.SELECTED DRAWING: Figure 4 【課題】圧力緩衝装置における流路形成部の製造を容易にする。【解決手段】油圧緩衝装置は、オイルを収容する第１シリンダと、第１シリンダの軸方向におけるピストンロッドの相対的な移動に伴ってオイルが流れる圧側油路３１１が形成されているピストンボディ３０と、ピストンボディ３０の圧側油路３１１を開閉する圧側減衰バルブと、を備える。そして、ピストンボディ３０は、環状に形成されて軸方向に突出し、圧側減衰バルブが接触する第１外側ラウンド部３３と、軸方向において第１外側ラウンド部３３とは逆側に突出し、軸方向の端部が第１外側ラウンド部３３よりも半径方向外側に位置するとともに、半径方向内側の少なくとも一部に軸方向に対して傾斜する第１内側傾斜部３８Ｔ１を有する環状突出部３８とを有している。【選択図】図４