Method for producing piston assembly and hydraulic fluid device
AssigneeSMC Corporation
InventorTsukasa ODAKA
Life of this patent
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Abstract
A hydraulic fluid cylinder is equipped with a cylinder tube, a piston unit, and a piston rod. The piston unit has a piston body comprising a plurality of members and provided with a gasket-mounting groove. The piston body has a first piston member and a second piston member which are layered in the axial direction. The gasket-mounting groove is formed from a combination of at least two members. A thin section exhibiting depth in the axial direction is provided in the first piston member and/or the second piston member.
Claims16
A fluid pressure device comprising:
- a body having a slide hole inside the body;
- a piston unit movable in an axial direction inside the slide hole;
- and
- a piston rod protruding from the piston unit in the axial direction;
- wherein:
- the piston unit includes a packing and a piston body comprising a plurality of members, the piston body being provided with a packing mounting groove in which the packing is mounted;
- the piston body includes, as the plurality of members, a first piston member and a second piston member stacked in the axial direction;
- a combination of at least two members of the plurality of members defines the packing mounting groove;
- and
- one or both of the first piston member and the second piston member are provided with a lightening portion having a depth in the axial direction.
A method for producing a piston assembly provided with a piston unit including a packing mounted in a packing mounting groove and a piston rod protruding from the piston unit, comprising the steps of:
- stacking a plurality of members including a first piston member and a second piston member by relatively moving the packing and the plurality of members in an axial direction in sequence, relative to the piston rod;
- and
- securing the first piston member and the second piston member to the piston rod;
- wherein:
- the plurality of members constitute a piston body provided with the packing mounting groove;
- a combination of at least two members of the plurality of members defines the packing mounting groove;
- and
- one or both of the first piston member and the second piston member are provided with a lightening portion having a depth in the axial direction.
Dependencies are inferred from the claim text.