JPH0243537U

JPH0243537U -

Info

Publication number: JPH0243537U
Application number: JP12148388U
Authority: JP
Priority date: 1988-09-16
Filing date: 1988-09-16
Publication date: 1990-03-26
Anticipated expiration: 2003-09-16
Also published as: JPH06672Y2

Description

[Brief explanation of the drawing]

第１図は本考案にかかる減衰力調整機構を備え
た油圧緩衝器の断面図、第２図は同調整機構の要
部拡大断面図、第３図は同減衰力調整機構部の伸
び行程の作動状態を示す要部拡大断面図、第４図
は同減衰力調整機構部の圧縮行程の作動状態を示
す要部拡大断面図である。尚、図面中、１はシリンダ、２は中空ロツド、
４はピストン、５は圧縮側油路、６は伸び側油路
、７は圧縮側バルブ、８は伸び側バルブ、３３は
バルブシート、３４は油路、３５はバルブカラー
、３６は油路、４０はプツシユロツド、４１，４
２はニードル、４３はチエツクバルブ、５０はピ
ストンである。 Fig. 1 is a sectional view of a hydraulic shock absorber equipped with a damping force adjustment mechanism according to the present invention, Fig. 2 is an enlarged sectional view of the main part of the adjustment mechanism, and Fig. 3 is an extension stroke of the damping force adjustment mechanism. FIG. 4 is an enlarged sectional view of the main part showing the operating state of the damping force adjustment mechanism in the compression stroke. In addition, in the drawing, 1 is a cylinder, 2 is a hollow rod,
4 is a piston, 5 is a compression side oil passage, 6 is an extension side oil passage, 7 is a compression side valve, 8 is an extension side valve, 33 is a valve seat, 34 is an oil passage, 35 is a valve collar, 36 is an oil passage, 40 is pushyrod, 41,4
2 is a needle, 43 is a check valve, and 50 is a piston.

Claims

[Claims for Utility Model Registration] (1) A damping force adjustment mechanism for a hydraulic shock absorber that adjusts the damping force by changing the opening amount of a bypass oil passage that bypasses the piston portion by moving the push rod forward and backward; A two-stage needle is formed at the tip, and the gap formed on the outer periphery of one needle is used as the orifice during the compression process of the buffer, and the gap formed on the outer periphery of the other needle is used as the orifice during the expansion process. A damping force adjustment mechanism for hydraulic shock absorbers. (2) A valve seat and a valve collar are interposed in the bypass oil passage, one of the two-stage needles faces the valve seat and the other faces the valve collar, and the valve seat and the valve collar meet. forming oil passages leading between the
2. The damping force adjustment mechanism for a hydraulic shock absorber according to claim 1, further comprising a check valve that opens and closes each oil passage of the valve seat and valve collar according to compression and expansion processes.