JPS6281703U

JPS6281703U -

Info

Publication number: JPS6281703U
Application number: JP1985170071U
Authority: JP
Priority date: 1985-11-05
Filing date: 1985-11-05
Publication date: 1987-05-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る油圧シリンダ
を示す部分断面図、第２図および第３図はその作
動状態を示す部分断面図、第４図は他の実施例を
示す部分断面図、第５図は従来の底着き緩衝部構
造を示す部分断面図である。１……シリンダ、２……ピストン部、３……ピ
ストンロツド、４……クツシヨンロツド、４ａ…
…ワツシヤ部、４ｂ，４ｃ，４ｄ……オリフイス
、５……ボトム部材、５ａ……通孔、６……スプ
リング、７……スライドリング、１０……絞り機
構としての油孔杆状部、１１……絞り機構として
のスライドワツシヤ、１１ａ……切り欠き部、１
２……スプリング、Ａ……高圧側室、Ｂ……背圧
側室。 FIG. 1 is a partial sectional view showing a hydraulic cylinder according to one embodiment of the present invention, FIGS. 2 and 3 are partial sectional views showing its operating state, and FIG. 4 is a partial sectional view showing another embodiment. , FIG. 5 is a partial sectional view showing a conventional bottom-mounted buffer structure. 1...Cylinder, 2...Piston part, 3...Piston rod, 4...Cushion rod, 4a...
... Washer part, 4b, 4c, 4d ... Orifice, 5 ... Bottom member, 5a ... Through hole, 6 ... Spring, 7 ... Slide ring, 10 ... Oil hole rod-shaped part as a throttle mechanism, 11 ...Slide washer as an aperture mechanism, 11a... Notch, 1
2... Spring, A... High pressure side chamber, B... Back pressure side chamber.

Claims

[Claims for Utility Model Registration] (1) A cushion rod is slidably provided inside the lower end of the piston rod, and the lower end of the cushion rod is provided with a communication passage connecting the high pressure side chamber in the cylinder and the back pressure side chamber in the bottom member. In the bottom-mounted buffer structure of a hydraulic cylinder that has a washer portion that allows the hole to be closed, when the washer portion of the cushion rod closes the through hole, the high pressure side chamber in the cylinder and the back pressure side chamber in the bottom member are closed. A bottom-mounted buffer structure for a hydraulic cylinder, characterized in that the cushion rod is formed in communication with a throttle mechanism formed at the lower end of the cushion rod. (2) A request for registration of a utility model in which the throttling mechanism has an oil hole rod-like portion connected to the lower end of the cushion rod, and the oil hole rod-like portion is communicated with the through hole to generate a throttling effect. The bottoming buffer structure of the hydraulic cylinder according to item 1. (3) The throttling mechanism has a slide washer with a notch inserted in the washer part of the cushion rod, and the notch of the slide washer is closed by the washer part to achieve the throttling effect. The structure of the bottoming buffer portion of a hydraulic cylinder according to claim 1 of the registered utility model claim. (4) A plurality of orifices are bored in the shaft of the cushion rod to enable communication between the high pressure side chamber in the cylinder and the back pressure side chamber in the bottom member, and the plurality of orifices are connected to the slide inserted in the cushion rod. The bottomed buffer structure of a hydraulic cylinder according to claim 1, which is formed so as to be sequentially closed from above by a ring.