JPS63201234U

JPS63201234U -

Info

Publication number: JPS63201234U
Application number: JP9239087U
Authority: JP
Priority date: 1987-06-16
Filing date: 1987-06-16
Publication date: 1988-12-26

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るシヨツクアブ
ソーバの部分縦断面図、第２図は第１図の一部拡
大断面図、第３図は他の実施例に係るバルブシー
ト部材の平面図、第４図は他の実施例に係るシヨ
ツクアブソーバの部分縦断面図、第５図は第４図
の一部拡大断面図、第６図は他の実施例に係るシ
ヨツクアブソーバの部分縦断面図、第７図は第６
図のバルブシート部材の平面図、第８図、第９図
は従来のシヨツクアブソーバの部分縦断面図であ
る。５０，７０，８１……第１のポート、５１，７
１，８２……第２のポート、５３，６７，８３…
…減衰バルブ、５４，５４ａ，６６，８４……リ
ーフバルブ、５５，９１，７４……内側シート部
、５６，７２，９３……外側シート部、５７，７
３，９２……中間シート部、５８，７５，９５…
…減圧溝、５９，７７，９４……開口溝、Ｓ……
〓間、Ｏ……オリフイス。 FIG. 1 is a partial longitudinal sectional view of a shock absorber according to an embodiment of the present invention, FIG. 2 is a partially enlarged sectional view of FIG. 1, and FIG. 3 is a plan view of a valve seat member according to another embodiment. , FIG. 4 is a partial vertical cross-sectional view of a shock absorber according to another embodiment, FIG. 5 is a partially enlarged cross-sectional view of FIG. 4, and FIG. 6 is a partial vertical cross-sectional view of a shock absorber according to another embodiment. , Figure 7 is the 6th
The plan view of the valve seat member shown in the figure, and FIGS. 8 and 9 are partial vertical sectional views of a conventional shock absorber. 50, 70, 81...first port, 51, 7
1, 82... second port, 53, 67, 83...
... Damping valve, 54, 54a, 66, 84 ... Leaf valve, 55, 91, 74 ... Inner seat part, 56, 72, 93 ... Outer seat part, 57, 7
3, 92... intermediate sheet portion, 58, 75, 95...
...Decompression groove, 59,77,94...Opening groove, S...
〓 Pause, O... orifice.

Claims

[Claims for Utility Model Registration] (1) A first port that controls damping force at medium speeds or higher and a second port that is a reflux passage are formed in the valve seat member in the axial direction, and the first port In a shock absorber in which a damping valve is provided at the lower end of the port so that the damping valve can be opened and closed, and a leaf valve is provided at the upper end of the second port so that the leaf valve can be opened and closed, an inner seat portion and an outer seat portion are provided on the upper surface side of the valve seat member. The intermediate sheet portion is made to stand concentrically, and an opening groove communicating with the second port is formed between the inner sheet portion and the intermediate sheet portion.
A pressure reducing groove is formed between the intermediate sheet portion and the outer sheet portion, and the upper end surface of the inner sheet portion and the upper end surface of the outer sheet surface are formed higher than the entire circumference or part of the upper end surface of the intermediate sheet portion. A shock absorber characterized in that a gap is formed between the upper end surface of the leaf valve and the lower end surface of the leaf valve, and an orifice is further formed between the lower surface of the outer peripheral end of the leaf valve and the upper end surface of the outer seat section. (2) The shock absorber according to claim (1), in which the orifice is notched in the lower end surface of the outer periphery of the leaf valve. (3) The shock absorber according to claim (1), wherein the orifice is a stamped orifice formed in the outer seat portion in the radial direction. (4) Utility model registration claim (1) in which a part of the upper end surface of the intermediate seat portion is formed to have the same height as the upper end surfaces of the inner and outer seat portions to support the lower end surface of the leaf valve. Shock absorber as described. (5) The shock absorber according to claim (1) of the utility model registration, in which the inner periphery of the leaf valve is fixed. (6) The shock absorber according to claim (1) of the utility model registration, wherein the leaf valve is a non-return valve. (7) The shock absorber according to claim 1, wherein the valve seat member is the piston body. (8) The shock absorber according to claim 1, wherein the valve seat member is a valve case of a base valve.