JPS6161305U

JPS6161305U -

Info

Publication number: JPS6161305U
Application number: JP14713684U
Authority: JP
Priority date: 1984-09-28
Filing date: 1984-09-28
Publication date: 1986-04-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の軸断面図、第２図
は実施例の主要部のチエツクリングを示す斜視図
、第３図ないし第５図は本考案の他の実施例の軸
断面図、第６図は従来の油圧シリンダの軸断面図
、第７図は公知のチエツク弁の断面図である。１…シリンダボデイ、２…ピストンロツド、３
…ロツドシールケース、４…ピストン、５…クツ
シヨンリング、１３，１５…ポート、１４，１６
…油通路、１７，１８，２１，２２…角、１９…
孔、２０…円筒凸部、３０，３５，３５ｃ…チエ
ツクリング、３１，４１…円周凹溝、３２…回り
止めピン、３３，３３ｃ，３３ｄ…第２の通路、
３４…スリーブ、３６，３７…パツキン、３８…
抜け止め用スナツプリング、３９，３９ｃ，３９
ｄ…第１の通路、４０…回り止め部、４２…孔、
５０…シリンダ室、５０ａ…ピストン４とロツド
シールケース３間のシリンダ室空間、５０ｂ…ピ
ストン４とシリンダボデイの肉厚部１ａ間のシリ
ンダ室空間。 Fig. 1 is an axial sectional view of one embodiment of the present invention, Fig. 2 is a perspective view showing a check ring of the main part of the embodiment, and Figs. 3 to 5 are axial sectional views of other embodiments of the invention. 6 is an axial sectional view of a conventional hydraulic cylinder, and FIG. 7 is a sectional view of a known check valve. 1...Cylinder body, 2...Piston rod, 3
...Rod seal case, 4...Piston, 5...Cushion ring, 13, 15...Port, 14, 16
...Oil passage, 17, 18, 21, 22... Corner, 19...
Hole, 20... Cylindrical convex portion, 30, 35, 35c... Check ring, 31, 41... Circumferential groove, 32... Stopping pin, 33, 33c, 33d... Second passage,
34...Sleeve, 36, 37...Putskin, 38...
Snap spring for retaining, 39, 39c, 39
d...first passage, 40...detent portion, 42...hole,
50...Cylinder chamber, 50a...Cylinder chamber space between the piston 4 and the rod seal case 3, 50b...Cylinder chamber space between the piston 4 and the thick part 1a of the cylinder body.

Claims

[Scope of utility model registration request]

In a smooth expansion and contraction structure of a hydraulic cylinder, which forms a narrow passage between a piston rod and a cylinder body side by movement of a piston, decelerates the piston and absorbs impact force, and prevents unsmooth operation due to the formation of the narrow passage. A check ring, which is a cylinder member attached to a cylindrical body formed on the cylinder body side near the narrow passage and has a cut in the axial direction, communicates the outer peripheral side of the check ring with the cylinder chamber. and a second passage that communicates with the inner circumferential side of the check ring and a hydraulic oil inlet/outlet port of the cylinder body that communicates with the narrow passage. Smooth expansion and contraction structure of cylinder.