JPS58169204U

JPS58169204U - Cylinder cushioning device

Info

Publication number: JPS58169204U
Application number: JP5654182U
Authority: JP
Inventors: 久儀橋本; 田村　盛雄
Original assignee: 日立建機株式会社
Priority date: 1982-04-19
Filing date: 1982-04-19
Publication date: 1983-11-11

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図は従来技術によるシリンダのクッション装置を示
す縦断面図、第２図乃至第６図は本考案の第１の実施例
を示し、第２図および第３図は異なる作動状態を示すヘ
ッドカバー側の部分縦断面図、第４図は第３図中の■−
■矢示方向断面四、　　゛第５図はクッション圧特性を
示す線図、第６図はピストン速度特性を示す線図、第７
図は本考案の第２の実施例を示すヘッドカバー側の部分
縦断面図である。１・・・シリンダ、２・・・ヘッドカバー、３・・・ロ
ッドカバー、４．７・・・クッション穴、６，９・・・
給排ポート、１０・・・ロッド、１１・・・ピストン、
１２゜１４・・・クッション部材、２１．３１・・・圧
油逃し機構。FIG. 1 is a longitudinal sectional view showing a cylinder cushioning device according to the prior art, FIGS. 2 to 6 show a first embodiment of the present invention, and FIGS. 2 and 3 show a head cover in different operating states. Partial vertical cross-sectional view of the side, Figure 4 is the ■- in Figure 3
■A cross section in the direction of the arrow 4. Figure 5 is a diagram showing the cushion pressure characteristics, Figure 6 is a diagram showing the piston speed characteristics, and Figure 7 is a diagram showing the piston speed characteristics.
The figure is a partial vertical sectional view of the head cover side showing a second embodiment of the present invention. 1...Cylinder, 2...Head cover, 3...Rod cover, 4.7...Cushion hole, 6,9...
Supply/discharge port, 10...rod, 11...piston,
12゜14...Cushion member, 21.31...Pressure oil relief mechanism.

Claims

[Scope of utility model registration request]

A piston that defines the inside of the cylinder into two oil chambers is slidably provided in the cylinder, and a cylinder cover that covers the cylinder is provided with a supply/discharge port that communicates with each of the oil chambers, and the piston In the cylinder cushioning device, the cylinder cover is provided with a cushion member that fits into a cushion hole provided in the cylinder cover to form a throttle passage and provide a cushioning effect on both sides of the cylinder cover. A cushion device for a cylinder, characterized in that a pressure oil release mechanism is provided for releasing pressurized oil in the oil chamber to the supply/discharge port when the member is fitted into the cushion hole and the pressure in the oil chamber exceeds a predetermined pressure.