PROBLEM TO BE SOLVED: To surely exert an attenuation property even if oil flows at a high flow speed.SOLUTION: A shock absorber comprises: a cylinder which is sealed with oil; a piston which is connected to a piston rod, and arranged so as to be slidable in the cylinder; and an attenuation force generation device 40 for generating an attenuation force by controlling a flow of oil which is generated by a slide of the piston in the cylinder accompanied by the displacement of the piston rod. The attenuation force generation device 40 comprises a valve main body 75 in which a compression-side inlet port 66c into which the oil pushed out by the piston flows is formed, and a compression-side attenuation valve 65 which is arranged so as to block a port outlet 77b, and exerts an attenuation force by being elastically deformed according to the pressure of oil which flows into the compression-side inlet port 66c. An opening cross section area A1 of a port flow-in port 79A is larger than a flow passage cross section area A0 of the compression-side inlet port 66c.SELECTED DRAWING: Figure 5
【課題】高い流速で油が流動した場合であっても、減衰特性を確実に発揮する。【解決手段】緩衝器は、油が封入されたシリンダと、ピストンロッドに接続されてシリンダの内部で摺動可能に設けられたピストンと、ピストンロッドの変位にともなってシリンダ内でピストンが摺動することによって生じる油の流れを制御して減衰力を発生する減衰力発生装置40と、を備える。減衰力発生装置40は、ピストンによって押し出される油が流れ込む圧側入口ポート66cが形成されたバルブ本体75と、ポート出口77bを閉塞するよう設けられ、圧側入口ポート66cに流れ込んだ油の圧力に応じて弾性変形することで減衰力を発揮する圧側減衰バルブ65と、を備え、ポート流入口79Aの開口断面積A1が、圧側入口ポート66cの流路断面積A0よりも大きい。【選択図】図5
SHOCK ABSORBER AND ATTENUATION FORCE GENERATION DEVICE
緩衝器、及び減衰力発生装置
05.10.2017
Patent
Elektronische Ressource
Japanisch
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