JPS6318643U

JPS6318643U -

Info

Publication number: JPS6318643U
Application number: JP1986112314U
Authority: JP
Priority date: 1986-07-22
Filing date: 1986-07-22
Publication date: 1988-02-06

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るフロントフオ
ーク部分的に示す縦断面図、第２図はピストン本
体の端面図、第３図は本考案の他の実施例を第１
図と同様に示す縦断面図、第４図ａ乃至第４図ｃ
は減衰力の特性線図、第５図は従来例を第１図と
同様に示す縦断面図、第６図はピストン本体の端
面図である。１……シリンダ、２……ピストン部、２０……
ピストン本体、２０ａ……シート部、２０ｂ……
シート面、２０ｃ……開口窓、２１……減衰バル
ブ、２６……シム、Ａ……上方室、Ｂ……下方室
、ａ……内側ポート、ｂ……外側ポート、ｌ_１…
…内側ポート外側径、ｌ_２……シート面外径、ｌ
_３……シート面内径、ｌ_４……外側ポート内側径
。 Fig. 1 is a vertical sectional view partially showing a front fork according to an embodiment of the present invention, Fig. 2 is an end view of the piston body, and Fig. 3 is a first embodiment of another embodiment of the present invention.
Longitudinal cross-sectional views shown in the same way as the figures, Figures 4a to 4c
5 is a characteristic diagram of damping force, FIG. 5 is a vertical cross-sectional view of a conventional example similar to FIG. 1, and FIG. 6 is an end view of the piston body. 1...Cylinder, 2...Piston part, 20...
Piston body, 20a... Seat part, 20b...
Seat surface, 20c...opening window, 21...damping valve, 26...shim, A...upper chamber, B...lower chamber, a...inner port, b...outer port, l ₁ ...
...Inner port outer diameter, l ₂ ... Seat surface outer diameter, l
₃ ...Seat surface inner diameter, _l4 ...Outer port inner diameter.

Claims

[Claims for Utility Model Registration] (1) A piston body that defines an upper chamber and a lower chamber in a cylinder, and is provided with an inner port and an outer port that allow communication between the upper chamber and the lower chamber. In a damping force generating device for a front fork, etc., which has a damping valve disposed so as to close the opening of the inner port, the damping force generating device includes a damping force generator, which forms an opening window of the inner port, and a damping valve arranged to close the opening of the inner port. The seat portion forming a seat surface adjacent to or facing the free end of the damping valve is formed to bulge outward from the outer diameter of the inner port,
A damping force generating device for a front fork or the like, characterized in that either the outer diameter of the seat surface or the inner diameter of the seat surface is formed to be larger than the inner diameter of the outer port. (2) A damping force generating device for a front fork or the like according to claim 1 of the utility model registration, wherein the seat portion is formed into a perfect circle. (3) Practical use in which the inner port is a growth-side port, a seat is provided at the lower end of the inner port, and a damping valve adjacent to or facing the seat is a growth-side damping valve. A damping force generating device for a front fork, etc. as claimed in claim 1 of the patent registration claim. (4) Registration of a utility model in which the inner port is a pressure side port, a seat is disposed on the upper end side of the inner port, and a damping valve adjacent to or facing the seat is a compression side damping valve. A damping force generating device for a front fork or the like according to claim 1. (5) The damping valve is composed of an annular leaf valve and allows an annular shim to be adjacent to the inner circumference thereof,
The damping force generating device for a front fork or the like according to claim 1, wherein the annular shim has a wall thickness that is the same as, thicker, or thinner than the annular leaf valve.