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US 2014/0076157 A1Published application
Piston assembly, fluid pressure cylinder, method for manufacturing piston assembly
AssigneeSMC Corporation
InventorChiaki Fukui
Life of this patent
Estimating the term…
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.
Claims8
A piston assembly (10A to 10F) comprising:
- a piston main body (13, 60, 80, 88, 100, 120);
- and
- a piston rod (15) joined to the piston main body (13, 60, 80, 88, 100, 120), wherein:
- the piston main body (13, 60, 80, 88, 100, 120) includes a first piston member (40, 62, 82, 84) and a second piston member (42, 64, 86) which are constituted from plate-like members;
- the first piston member (40, 62, 82, 84) and the second piston member (42, 64, 86) are joined mutually under a condition of being superimposed in an axial direction of the piston rod (15);
- a seal installation groove (17, 65, 96) that extends in a circumferential direction is formed between an outer peripheral edge of the first piston member (40, 62, 82, 84) and an outer peripheral edge of the second piston member (42, 64, 86);
- and
- at least one of the first piston member (40, 62, 82, 84) and the second piston member (42, 64, 86) has a plate thickness over the entirety thereof.
5 more elements
A method for manufacturing a piston assembly (10A to 10F) comprising:
- a first step of superimposing a first piston member (40, 62, 82, 84) and a second piston member (42, 64, 86) which are constituted from plate-like members, and joining both members to obtain a piston main body (13, 60, 80, 88, 100, 120);
- and
- a second step of joining a piston rod (15) to the piston main body (13, 60, 80, 88, 100, 120), wherein:
- a seal installation groove (17, 65, 96) that extends in a circumferential direction is formed between an outer peripheral edge of the first piston member (40, 62, 82, 84) and an outer peripheral edge of the second piston member (42, 64, 86);
- and
- at least one of the first piston member (40, 62, 82, 84) and the second piston member (42, 64, 86) has a plate thickness over the entirety thereof.
3 more elements
Dependencies are inferred from the claim text.