JPH0448404U

JPH0448404U -

Info

Publication number: JPH0448404U
Application number: JP8980090U
Authority: JP
Priority date: 1990-08-28
Filing date: 1990-08-28
Publication date: 1992-04-24
Anticipated expiration: 2005-08-28
Also published as: JP2524017Y2

Description

[Brief explanation of drawings]

第１図は本考案の第１実施例の半部縦断正面図
、第２図はロツド側カラーの縦断面図、第３図は
第２図のＡ−Ａ断面図、第４図はピストンのスト
ロークと溝の断面積の変化を示す線図、第５図及
び第６図はピストンのストロークと時間及び速度
との関係線図、第７図は第２実施例の半部縦断正
面図、第８図は第２実施例におけるピストンのス
トロークと時間の関係線図である。１，３１……シリンダ、３，４，３３，３４…
…カバー、３ａ，４ａ，３３ａ，４４ａ……凹部
、７……ピストン、８，９……カラー、８ａ，９
ａ……溝、１２，１３……リング、１５，１６，
３５，３７……ポート、１５ａ，１６ａ……主流
路、１５ｂ，１６ｂ……バイパス流路、１７，１
８……圧力室、２０……チエツク弁、２１……ニ
ードル弁、３６，３８……クツシヨンリング。 Fig. 1 is a half longitudinal sectional front view of the first embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the rod side collar, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a piston cross-sectional view. 5 and 6 are diagrams showing the relationship between the stroke and the time and speed of the piston, and FIG. 7 is a half longitudinal sectional front view of the second embodiment. FIG. 8 is a diagram showing the relationship between the stroke of the piston and time in the second embodiment. 1, 31...Cylinder, 3, 4, 33, 34...
...Cover, 3a, 4a, 33a, 44a... Recess, 7... Piston, 8, 9... Collar, 8a, 9
a... Groove, 12, 13... Ring, 15, 16,
35, 37...port, 15a, 16a...main flow path, 15b, 16b...bypass flow path, 17,1
8...Pressure chamber, 20...Check valve, 21...Needle valve, 36, 38...Cushion ring.

Claims

[Claims for Utility Model Registration] 1. A fluid pressure cylinder that includes a cylinder and a piston that slides inside the cylinder, and that supplies and discharges pressure fluid from a port to a pair of pressure chambers partitioned by the piston to cause the piston to reciprocate. In this case, one or both of the covers constituting the cylinder is provided with a recess that communicates with the port and opens on the pressure chamber side, and the piston has an axial length on one or both sides that is approximately equal to its stroke. and a collar that fits loosely into the recess, the collar includes an axial groove whose cross-sectional area smoothly changes, and the recess includes a ring that abuts the outer peripheral surface of the collar. A fluid pressure cylinder with a speed control mechanism. 2. The fluid pressure cylinder with a speed control mechanism according to claim 1, wherein the cross-sectional area of the groove is gradually increased from both ends toward the center. 3. The fluid pressure cylinder with a speed control mechanism according to claim 2, wherein the cross-sectional area of the groove is changed in a sinusoidal shape. 4. A cushion ring that only allows fluid to flow in from the port to the pressure chamber is provided on one side of the recess, and a cushion ring that only allows fluid to flow out from the pressure chamber to the port is provided on the other side of the recess. A fluid pressure cylinder with a speed control mechanism according to any one of claims 1 to 3. 5. The fluid with a speed control mechanism according to claim 1, wherein a check valve is provided in the main flow path communicating the port and the pressure chamber, and a flow rate adjustment valve is provided in the bypass flow path communicating the port with the recess. pressure cylinder.