JPS6362608U

JPS6362608U -

Info

Publication number: JPS6362608U
Application number: JP15772886U
Authority: JP
Priority date: 1986-10-15
Filing date: 1986-10-15
Publication date: 1988-04-25

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す空気圧シリ
ンダ用クツシヨン装置の部分断面図、第２図は上
記空気圧シリンダ用クツシヨン装置の部分拡大図
、第３図はピストンの始動時の新クツシヨンシー
ル部材の動作と流通路内の空気の流れを示す説明
図、第４図はこの考案の他の実施例を示す拡大断
面図、第５図は従来の空気圧シリンダ用クツシヨ
ン装置の断面図である。１……シリンダチユーブ、２……ピストンロツ
ド、３……ピストンパツキン、４……ピストン、
５……クツシヨンスリーブ、５ａ……先端部、６
……主ポート、７……クツシヨンスリーブ嵌入孔
、９……ヘツドカバー、１１……クツシヨンシー
ル部材、１２……移動用環状溝、１３……クツシ
ヨンポート、１４……ニードル弁、１５……空間
部、１１０……新クツシヨンシール部材、１１０
ａ……補助排気用溝、１１０ｂ……シールリツプ
部。 Fig. 1 is a partial sectional view of a cushion device for a pneumatic cylinder showing an embodiment of this invention, Fig. 2 is a partially enlarged view of the cushion device for a pneumatic cylinder, and Fig. 3 is a new cushion seal when the piston starts. FIG. 4 is an enlarged sectional view showing another embodiment of this invention, and FIG. 5 is a sectional view of a conventional cushion device for a pneumatic cylinder. 1... Cylinder tube, 2... Piston rod, 3... Piston seal, 4... Piston,
5...Cushion sleeve, 5a...Tip, 6
...Main port, 7...Cushion sleeve insertion hole, 9...Head cover, 11...Cushion seal member, 12...Movement annular groove, 13...Cushion port, 14...Needle valve, 15... ...Space part, 110...New cushion seal member, 110
a...Auxiliary exhaust groove, 110b...Seal lip portion.

Claims

[Scope of utility model registration request]

provided at one end of the cylinder tube 1, and
A main port 6 for supplying air into the cylinder tube 1 communicates with the inside of the cylinder tube 1,
It has a cushion port 13 equipped with a flow rate regulating valve such as a needle valve 14 that regulates and exhausts the flow of air within the cylinder tube 1, and has a cushion port 13 in its center that communicates with the main port 6, and a head cover 9 in which a cushion sleeve fitting hole 7 is formed for fitting one end of the cushion sleeve 5;
A cushion sleeve 5 whose distal end 5a is fitted into the cushion sleeve insertion hole 7 of the head cover 9 and which is attached to the back surface of the piston 4 reciprocating within the cylinder tube 1, and an outer periphery of the cushion sleeve 5. an annular cushion seal member 11 interposed between the cushion sleeve fitting hole 7 and the inner wall of the cushion sleeve fitting hole 7; In the cushion device for a pneumatic cylinder, the air in the space 15 formed behind the piston 4 and the cushion sleeve fitting hole 7 is exhausted to the outside through a regulating valve to reduce the speed of the piston 4. An annular groove 12 for movement is formed on the outer periphery of the cushion sleeve 5 or on the inner wall of the cushion sleeve fitting hole 7.
A new annular cushion seal member 110 is interposed in this annular groove for movement 12 so as to be movable in the axial direction of the cushion sleeve 5, and the new cushion seal member 110 is An auxiliary exhaust groove 110a that extends continuously in the axial and radial directions is formed on the outer periphery, and a seal lip 110b is formed at the tip thereof, so that the piston 4 in the cylinder tube 1 is connected to the terminal end of the cylinder tube 1. when the cushion sleeve 5 approaches the new cushion seal member 1.
10, and its new cushion seal member 11
0 in the axial direction, and the seal lip portion 110b formed at the tip of the new cushion seal member 110 is brought into pressure contact with the inner wall surface of the annular groove 12 for movement, thereby sealing the inside of the cylinder tube 1 and the cushion sleeve. Blocking the flow path between the insertion hole 7 and
The air in the cylinder tube 1 is exhausted only through the cushion port 13 to reduce the moving speed of the piston 4, and when the piston 4 is started, the cushion sleeve is inserted through the main port 6. The new cushion seal member 110 is pressed and moved in the opposite axial direction by the air pressure introduced into the hole 7, and the seal lip portion 110b is released from pressure to form a gap, through which the new cushion seal member 110 is moved. A cushion device for a pneumatic cylinder, characterized in that air is introduced into a space 15 formed on the back surface of a piston 4, and the increased air pressure presses the piston 4 to activate the piston 4.