JPS62185941U

JPS62185941U -

Info

Publication number: JPS62185941U
Application number: JP7504786U
Authority: JP
Priority date: 1986-05-19
Filing date: 1986-05-19
Publication date: 1987-11-26

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
ソーバを一部破断して示す縦断面図、第２図はそ
のベースバルブ部のみを拡大して示す縦断面図、
第３図および第４図は他の実施例としてのベース
バルブ部を第２図と同様に示す縦断面図、第５図
は従来例としてのシヨツクアブソーバを部分的に
示す縦断面図、第６図はそのベースバルブ部の作
動状態を示す部分縦断面図である。１０…シリンダ、２０…ピストン部、２１ｃ…
シート部、２２…伸側メインバルブ、２２ａ…上
方リーフバルブ、２２ｂ…下方リーフバルブ、３
０…ベースバルブ部、３１ｄ…シート部、３２…
圧側バルブ、３２ａ…上方リーフバルブ、３２ｂ
…下方リーフバルブ、４０…ピストンロツド、４
２…伸側サブバルブ、５０…コントロールバルブ
、Ａ…上方室、Ｂ…下方室、Ｃ…リザーバ室。 FIG. 1 is a longitudinal sectional view partially broken away of a shock absorber according to an embodiment of the present invention, and FIG. 2 is an enlarged longitudinal sectional view showing only the base valve portion thereof.
3 and 4 are vertical cross-sectional views showing a base valve part as another embodiment in the same manner as in FIG. 2, FIG. 5 is a vertical cross-sectional view partially showing a shock absorber as a conventional example, and FIG. The figure is a partial vertical sectional view showing the operating state of the base valve section. 10...Cylinder, 20...Piston part, 21c...
Seat portion, 22... Extension side main valve, 22a... Upper leaf valve, 22b... Lower leaf valve, 3
0...Base valve part, 31d...Seat part, 32...
Pressure side valve, 32a...Upper leaf valve, 32b
...Lower leaf valve, 40...Piston rod, 4
2... Growth side sub-valve, 50... Control valve, A... Upper chamber, B... Lower chamber, C... Reservoir chamber.

Claims

[Claims for Utility Model Registration] (1) Hydraulic oil from upstream passes through the annular gap formed between the upper surface of the outer peripheral end of the upper leaf valve and the lower surface of the seat opposite to the upper surface of the outer peripheral end of the upper leaf valve. By passing through the lower leaf valve, it is possible to generate a damping force in a low speed range of the piston speed, and by bending the outer peripheral end of the lower leaf valve, it is possible to generate a damping force in a medium to high speed range of the piston speed. A shock absorber characterized in that the inner peripheral ends of the upper leaf valve and the lower leaf valve are laminated and fixed. (2) The shock absorber according to claim 1, wherein the annular gap is formed in advance regardless of whether or not hydraulic oil passes from the upstream side. (3) Utility model registration claim No. 1 in which the annular gap is formed when the outer peripheral end of the upper leaf valve is bent.
Shock absorber as described in section. (4) The shock absorber according to claim 1, wherein the seat portion is formed on the lower surface of the piston body in the cylinder piston portion. (5) The shock absorber according to claim 1, wherein the seat portion is formed on the lower surface of the valve case in the in-cylinder base valve portion.