JPH0266742U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

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は油圧緩衝器、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は外プツシユロツド、４１は
内プツシユロツド、４２，４４はニードル、４５
はチエツクバルブである。 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 hydraulic shock absorber, 6 is an oil passage on the extension side, 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 the outer push rod, 41 is the inner push rod, 42 and 44 are the needles, 45
is a check valve.

Claims (1)

【実用新案登録請求の範囲】 (1) プツシユロツドを進退させることによりピ
ストン部をバイパスするバイパス油路の開口量を
変化させて減衰力を調整する油圧緩衝器の減衰力
調整機構において、前記プツシユロツドは内外二
重構造にして、内外各プツシユロツドは独立して
進退可能となし、内外各プツシユロツドの先端部
にはそれぞれニードルを形成し、各ニードル先端
部に形成されるオリフイスの一方を緩衝器の伸張
時のオリフイスとし、他方を圧縮行程時のオリフ
イスとしたことを特徴とする油圧緩衝器の減衰力
調整機構。 (2) 前記バイパス油路内にはバルブシート及び
バルブカラーを介設し、前記外プツシユロツドの
ニードルを前記バルブシートに、前記内プツシユ
ロツドのニードルを前記バルブカラーにそれぞれ
臨ませ、前記バルブシート及びバルブカラーには
前記内プツシユロツドのニードルと前記外プツシ
ユロツドのニードルとの間に通じる油路をそれぞ
れ形成し、これらバルブシート及びバルブカラー
の各油路を圧縮及び伸び行程に応じて開閉するチ
エツクバルブを設けたことを特徴とする請求項(1
)に記載の油圧緩衝器の減衰力調整機構。[Claims for Utility Model Registration] (1) In a damping force adjustment mechanism for a hydraulic shock absorber that adjusts damping force by changing the opening amount of a bypass oil passage that bypasses a piston portion by moving a push rod forward or backward, the push rod is The inner and outer push rods have a double structure, allowing the inner and outer push rods to move forward and backward independently. A needle is formed at the tip of each of the inner and outer push rods, and one of the orifices formed at the tip of each needle is used when the shock absorber is extended. A damping force adjustment mechanism for a hydraulic shock absorber, characterized in that one orifice is used as an orifice during a compression stroke, and the other is used as an orifice during a compression stroke. (2) A valve seat and a valve collar are interposed in the bypass oil passage, so that the needle of the outer push rod faces the valve seat, the needle of the inner push rod faces the valve collar, and the needle of the outer push rod faces the valve seat, and the needle of the inner push rod faces the valve collar. A check valve is provided in the collar to form oil passages communicating between the needle of the inner push rod and the needle of the outer push rod, and to open and close the oil passages of the valve seat and the valve collar according to compression and extension strokes. Claim (1) characterized in that
) damping force adjustment mechanism of the hydraulic shock absorber.