JPH0450740U

JPH0450740U -

Info

Publication number: JPH0450740U
Application number: JP9385890U
Authority: JP
Priority date: 1990-09-06
Filing date: 1990-09-06
Publication date: 1992-04-28

Description

[Brief explanation of the drawing]

第１図はこの考案に係るロータリーバルブの装
備状態を示す部分横断面図、第２図はその縦断面
図、第３図は減衰力の変化状態を示す特性線図、
第４図は従来例に係るロータリーバルブを装備す
る油圧緩衝器を示す部分縦断面図、第５図は従来
例としてロータリーバルブの装備状態を示す部分
横断面図、第６図は従来例に係る油圧緩衝器にお
ける減衰力の変化状態を示す特性線図である。符号の説明、１……シリンダ体、２……ピスト
ン部、３……ロツド体、３ａ……縦孔、３ｃ……
横孔、４……ロータリバルブ、４ａ，４ｂ，４ｃ
……オリフイス、４ｄ，４ｅ，４ｆ，４ｇ……切
欠部、Ａ……ロツド側油室、Ｂ……ピストン側油
室、Ｌ……バイパス路。 FIG. 1 is a partial cross-sectional view showing the equipment state of the rotary valve according to this invention, FIG. 2 is a vertical cross-sectional view thereof, and FIG. 3 is a characteristic line diagram showing changes in damping force.
Fig. 4 is a partial vertical cross-sectional view showing a hydraulic shock absorber equipped with a rotary valve according to a conventional example, Fig. 5 is a partial cross-sectional view showing a conventional example in which a rotary valve is installed, and Fig. 6 is a partial cross-sectional view of a conventional example. FIG. 3 is a characteristic diagram showing a state of change in damping force in a hydraulic shock absorber. Explanation of symbols: 1...Cylinder body, 2...Piston part, 3...Rod body, 3a...Vertical hole, 3c...
Side hole, 4...Rotary valve, 4a, 4b, 4c
... Orifice, 4d, 4e, 4f, 4g ... Notch, A ... Rod side oil chamber, B ... Piston side oil chamber, L ... Bypass path.

Claims

[Scope of utility model registration request]

A piston part slidably housed in the cylinder body partitions the cylinder body into a rod-side oil chamber and a piston-side oil chamber, and the rod-side oil chamber and the piston-side oil chamber are connected to the piston part. is connected to the rod body connected to the tip thereof through an open bypass passage, and when the bypass passage is rotated, it is possible to select whether or not the hydraulic oil can flow through the bypass passage, and A hydraulic shock absorber having a rotary valve formed to be able to change the flow rate of hydraulic oil in the bypass passage, wherein the hydraulic shock absorber has a rotary valve having a different diameter to enable the flow of hydraulic oil in the bypass passage when the rotary valve is rotated. A rotary valve for a hydraulic shock absorber, characterized in that it has a plurality of orifices at appropriate intervals in its circumferential direction, and each orifice has a notch in the outer circumferential surface of an adjacent portion of the orifice.