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Piston assembly, fluid pressure cylinder, method for manufacturing piston assembly

A technology of assembly and piston, applied in the direction of fluid pressure actuating device, piston, manufacturing tool, etc., can solve the problems such as the inability to obtain sealing performance, and achieve the effects of simplified structure, elimination of reliability and cost reduction

Inactive Publication Date: 2014-03-05
SMC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A certain amount of sealing performance can be imparted by plastic deformation of metal, however, in this case, there is concern that sufficient sealing performance cannot be obtained

Method used

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  • Piston assembly, fluid pressure cylinder, method for manufacturing piston assembly
  • Piston assembly, fluid pressure cylinder, method for manufacturing piston assembly
  • Piston assembly, fluid pressure cylinder, method for manufacturing piston assembly

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0048] figure 1 is a partially omitted vertical sectional view along the axial direction of the fluid pressure cylinder 11 equipped with the piston assembly according to the first embodiment of the present invention. The fluid pressure cylinder 11 includes: a casing (cylinder body) 12 as its basic constituent elements, a piston body 13 arranged movably in the axial direction inside the casing 12, and a piston rod 15 connected to the piston Subject 13. Due to the action of the fluid pressure, the piston body 13 moves axially in the housing 12 , so that the piston rod 15 connected to the piston body 13 moves reciprocally.

[0049] The casing 12 is constructed of a metal material such as aluminum alloy or the like, is mounted with a pair of ports 14 , 16 , and has a slide hole (cylinder chamber) 18 inside which communicates with the ports 14 , 16 . In the inside of the slide hole 18, the piston main body 13 can move reciprocally in the axial direction within a certain limited r...

no. 2 example

[0073] Next, refer to Figures 4A to 5 , the piston assembly 10B according to the second embodiment will be explained. In the piston assembly 10B according to the second embodiment, components whose functions and effects are the same as those of the piston assembly 10A according to the first embodiment are denoted by the same symbols and detailed description thereof is omitted.

[0074] The piston assembly 10B according to the second embodiment is equipped with a piston main body 60 whose structure is different from figure 1 and so on the piston body 13 shown. The piston main body 60 is composed of a first piston member 62 and a second piston member 64 .

[0075] Each of the first piston member 62 and the second piston member 64 is an oblong plate-shaped member as a whole, which is formed by plastic deformation (such as press working) of a metal plate, and the first piston member 62 and the second piston member 62 The two piston members 64 are joined to each other by weldin...

no. 3 example

[0084] Next, refer to Figures 6A to 7 , a piston assembly 10C according to the third embodiment will be explained. In the piston assembly 10C according to the third embodiment, components whose functions and effects are the same as those of the piston assembly 10A according to the first embodiment are denoted by the same symbols and detailed description thereof is omitted.

[0085] A piston assembly 10C according to the third embodiment includes a piston main body 80 , and a piston rod 81 connected to the piston main body 80 . Piston rod 81 is configured from figure 1 The piston rod 15 shown etc. omits the fitting portion 56 . and Figure 3C The same weld protrusion 58 shown is provided on the proximal end surface of the piston rod 81 .

[0086] The piston body 80 is composed of a first piston member 82 and a second piston member 42 . The first piston member 82 is configured to Figure 2B The first piston member 40 shown etc. omits the through hole 47 . More specifical...

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PUM

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Abstract

A piston main body (13) in a piston assembly (10A) of a fluid pressure cylinder (11) has a first piston member (40) and a second piston member (42) composed of a plate-shaped member. The first piston member (40) and the second piston member (42) are joined in a state overlapping in the axial direction of a piston rod (15). The second piston member (42) is not provided with a hole that passes through in the plate thickness direction.

Description

technical field [0001] The invention relates to a piston assembly, a fluid pressure cylinder comprising the piston assembly, and a method for manufacturing the piston assembly having a piston body and a piston rod connected to the piston body. Background technique [0002] A known type of fluid pressure cylinder comprises a cylinder, a piston configured to move axially inside the cylinder, and a piston rod connected to the piston. The fluid pressure cylinder is configured such that when the piston moves due to fluid pressure, a piston rod connected to the piston moves. As a method for connecting the piston and the piston rod, a screw joint method or a method including crimping is generally used. For the screw joint method, a screw hole (internal thread) is provided axially through the piston, while an external thread is provided on one end of the piston rod, and the piston rod is directly attached to the piston by screw joint, or, drilled Be set in the piston, and after on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/14F15B15/28F16J1/12
CPCF16J1/008B23K2203/04B23K11/16F16J1/12B23K11/185B23K2201/003F15B15/1452F15B15/2807F15B15/1447B23K2203/10B23K11/006B23K2203/02B23K11/14B23K2101/003B23K2103/02B23K2103/04B23K2103/05B23K2103/10F15B15/14F15B15/28
Inventor 福井千明
Owner SMC CORP
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