JPS5897331U

JPS5897331U - piston structure

Info

Publication number: JPS5897331U
Application number: JP19545081U
Authority: JP
Inventors: 宇田　幸一
Original assignee: カヤバ工業株式会社
Priority date: 1981-12-25
Filing date: 1981-12-25
Publication date: 1983-07-02

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案のピストン構造の一実施例を示す断面図
、第２図はノンリタンバルブの拡大斜視図、第３図は同
じく側面図、第４図は同じく拡大断面図、第５図は同じ
く拡大斜視図、第６図はピストン構造の他の実施例を示
す側面図、第７図は同じくその拡大した側面断面図、第
８図はさらに他の実施例を示す側面図、第９図はまた他
の実施例を拡大した側面断面図である４゜１・・・・・・ピストン９ツド、２・・・・・・ピスト
ン、３・・・…バルブストッパ、７：・・−通油Ｌ　８
・・間バルブシート面、９．　９Ａ、　　９Ｂ−−−−
−−フリーフロー切欠、１０・・・・・・軸部、１１．
ＩＩＡ・・・・・・溝、１２．１６・・・・・・オリフ
ィス、１３．１３Ａ・・・・・・ノンリタンバルブ。第３図９゛９第５図ｐ　　、ＩＩ　　／１２Fig. 1 is a sectional view showing an embodiment of the piston structure of the present invention, Fig. 2 is an enlarged perspective view of a non-return valve, Fig. 3 is a side view, Fig. 4 is an enlarged sectional view, and Fig. 5. 6 is a side view showing another embodiment of the piston structure, FIG. 7 is an enlarged side sectional view thereof, FIG. 8 is a side view showing still another embodiment, and FIG. 9 is a side view showing another embodiment of the piston structure. The figure is also an enlarged side sectional view of another embodiment. Oil supply L 8
・・Valve seat surface, 9. 9A, 9B----
--Free flow notch, 10...Shaft portion, 11.
IIA...groove, 12.16...orifice, 13.13A...non-return valve. Fig. 3 9゛9 Fig. 5 p, II/12

Claims

[Scope of utility model registration request]

(1) An annular valve receiving space having a flat valve seat surface is provided between the integrally molded piston and the valve stopper, and a through hole and a free cutout are respectively provided at the relative positions of the piston and the valve stopper. A piston structure in which an annular non-return valve having an overlapping surface such that the upper and lower surfaces are flat at the cut end is inserted and assembled into the valve receiving space from the outer circumferential direction of the piston.

(2) The piston structure according to claim 1, wherein the non-return valve is provided with an orifice that communicates with an oil passage hole provided in the piston.

(3) The one-stone structure according to claim 1, wherein the piston has a first refit that communicates with the oil hole on the valve seat side of the piston.

(4) The piston structure according to claim 1, wherein a groove continuous to the free flow notch provided in the valve stopper is formed in the axial direction on the outer periphery of the shaft between the piston and the valve stopper.