JPS628446U

JPS628446U -

Info

Publication number: JPS628446U
Application number: JP1985099705U
Authority: JP
Priority date: 1985-06-29
Filing date: 1985-06-29
Publication date: 1987-01-19
Also published as: JPH0438112Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係る油圧緩衝器を
破断して部分的に示す正面断面図、第２図はピス
トン本体の上端面図、第３図はピストン本体の下
端面図、第４図は第２図および第３図中線―
で示すピストン本体の断面図である。１…シリンダ、２…ピストンロツド、３…ピス
トン部、５…伸側バルブ、６…チエツク弁、１０
…ピストン本体、１１…内側ポート、１２…外側
ポート、１３…内側環状溝、１４…外側環状溝、
１５，１６，１８…バルブシート面、１７…環状
溝、１７ａ…膨出部、Ａ…上方油室、Ｂ…下方油
室。 FIG. 1 is a partially cutaway front sectional view of a hydraulic shock absorber according to an embodiment of the present invention, FIG. 2 is a top end view of the piston body, FIG. 3 is a bottom end view of the piston body, and FIG. Figure 4 is the center line of Figures 2 and 3.
FIG. 2 is a sectional view of the piston body shown in FIG. DESCRIPTION OF SYMBOLS 1... Cylinder, 2... Piston rod, 3... Piston part, 5... Extension side valve, 6... Check valve, 10
...Piston body, 11...Inner port, 12...Outer port, 13...Inner annular groove, 14...Outer annular groove,
15, 16, 18...Valve seat surface, 17...Annular groove, 17a...Bulging portion, A...Upper oil chamber, B...Lower oil chamber.

補正昭６１．２．１２図面の簡単な説明を次のように補正する。明細書第１２頁９行に「断面図である。」とあ
るを「断面図、第５図はチエツク弁の平面図であ
る。」と訂正する。Amendment February 12, 1981 The brief description of the drawing is amended as follows. On page 12, line 9 of the specification, the phrase ``This is a sectional view.'' is corrected to ``The sectional view, and FIG. 5 is a plan view of the check valve.''

Claims

[Claims for Utility Model Registration] (1) The piston body that slides inside the cylinder has an inner port on the inner circumference side and an outer port on the outer circumference side, and an expansion side valve on the lower end surface of the piston body. In the piston structure of the small-diameter hydraulic shock absorber, the lower end of the inner port opens into an annular groove formed on the inner peripheral side of the lower end surface of the piston body, and the annular groove is connected to the outer periphery of the lower end surface of the piston body. A piston part structure of a small diameter hydraulic shock absorber, characterized in that it is partially bulged out to the side so that the pressure receiving surface of the inner port for the expansion side valve is large. (2) An inner annular groove in which the upper end of the inner port opens is formed on the inner circumferential side of the upper end surface of the piston body, and an outer annular groove in which the upper end of the outer port opens on the outer circumferential side of the upper end surface of the piston body. A piston portion structure of a small-diameter hydraulic shock absorber as claimed in claim 1 of the registered utility model. (3) A piston structure for a small-diameter hydraulic shock absorber according to claim 1, wherein the inner port has a circular cross section and the outer port has a rectangular cross section. (4) The structure of a piston portion of a small-diameter hydraulic shock absorber as set forth in claim 1, in which the extension valve is a leaf valve in which a notch is formed.