JPH0248633U

JPH0248633U -

Info

Publication number: JPH0248633U
Application number: JP12786388U
Authority: JP
Priority date: 1988-09-29
Filing date: 1988-09-29
Publication date: 1990-04-04
Anticipated expiration: 2003-09-29
Also published as: JP2502378Y2

Description

[Brief explanation of drawings]

第１図は本考案一実施例の液圧緩衝器の要部を
示す拡大断面図（第２図Ａ部詳細図）、第２図は
実施例の液圧緩衝器を示す断面図、第３図は実施
例の液圧緩衝器の要部を示す（第２図Ｂ部詳細図
）拡大断面図、第４図は実施例及び従来例の各部
における減衰力―ピストン速度特性を示すグラフ
であつて、イは低減衰デイスクバルブの特性、ロ
は高減衰力デイスクバルブの特性、ハは第２連通
路の特性を示すグラフ、第５図は実施例及び従来
例の総合的な減衰力―ピストン速度特性を示すグ
ラフである。４ｃ……高減衰用デイスクバルブ、４ｅ……低
減衰用デイスクバルブ、４ｆ……ベースボデイ（
バルブボデイ）、４０３……第２連通路、４０５
……第１シート面、４０６……第２シート面、４
０８……コンスタントオリフイス、４１１……ワ
ツシヤ当接位置（内周固定部位置）、５ｃ……ピ
ストンボデイ（バルブボデイ）、５ｄ……低減衰
用デイスクバルブ、５ｇ……高減衰用デイスクバ
ルブ、５０３……第２連通路、５０５……第１シ
ート面、５０６……第２シート面、５０８……コ
ンスタントオリフイス、５１１……ストツパプレ
ート当接位置（内周固定部位置）。 Fig. 1 is an enlarged cross-sectional view showing the main parts of a hydraulic shock absorber according to an embodiment of the present invention (detailed view of section A in Fig. 2); Fig. 2 is a cross-sectional view showing the hydraulic shock absorber according to the embodiment; The figure is an enlarged cross-sectional view showing the main parts of the hydraulic shock absorber of the embodiment (detailed view of part B in Fig. 2), and Fig. 4 is a graph showing the damping force vs. piston speed characteristics of each part of the embodiment and the conventional example. A is a graph showing the characteristics of the low damping disc valve, B is the characteristics of the high damping force disc valve, C is a graph showing the characteristics of the second communication passage, and Fig. 5 is the overall damping force of the embodiment and the conventional example - piston It is a graph showing speed characteristics. 4c...Disc valve for high damping, 4e...Disc valve for low damping, 4f...Base body (
Valve body), 403...Second communication passage, 405
...First sheet surface, 406 ...Second sheet surface, 4
08... Constant orifice, 411... Washer contact position (inner periphery fixed part position), 5c... Piston body (valve body), 5d... Disc valve for low damping, 5g... Disc valve for high damping, 503... ...Second communication path, 505...First seat surface, 506...Second seat surface, 508...Constant orifice, 511...Stopper plate contact position (inner periphery fixed portion position).

Claims

[Claims for Utility Model Registration] Provided in a hydraulic shock absorber filled with hydraulic fluid,
A valve body is formed with a communication passage through which hydraulic fluid flows during piston stroke, and a low damping valve is fixed to the valve body by an inner peripheral fixing part and arranged in series with the communication passage in order to open and close the communication passage. a disc valve and a high damping disc valve; a first seat surface formed on the valve body and with which the low damping disc valve comes into contact when the valve is closed; and a second seat surface with which the high damping disc valve comes into contact when the valve is closed; , a constant orifice formed between the second seat surface and the high damping disc valve, and the position of the second seat surface relative to the high damping disc valve is determined by the inner peripheral fixing part of the high damping disc valve. 1. A hydraulic shock absorber, characterized in that the high damping disc valve is bent in the valve opening direction, and the high damping disc valve is bent in the valve opening direction.