Piston for a working cylinder

A technology of working cylinders and pistons, which is applied in the direction of pistons, cylindrical pistons, plungers, etc., can solve the problems of time-consuming, high manufacturing and assembly costs, and achieve the effect of simple design
CN101218436BInactive Publication Date: 2011-08-10FESTO AG & CO KG
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
FESTO AG & CO KG
Publication Date
2011-08-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a piston for a working cylinder, said piston comprising two coaxial piston elements (23a, 23b) which together surround a metallic core and at least partially consist of a plastic material, at least one of said piston elements comprising a radially outwardly arranged annular piston seal (25a, 25b). The two piston elements (23a, 23b) are independently coaxially engaged withthe metallic core (22), from opposite sides, by means of an engaging device (24a, 24b) respectively provided on each element. The entire metallic core (22) is held on the respective piston element (23a, 23b) by means of the two engaging devices (24a, 24b), such that the piston elements (23a, 23b) are axially held together by means of the metallic core (22) as a connection member.
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Description

technical field

[0001] The invention relates to a piston of a working cylinder with two mutually coaxial piston elements surrounding a metal core and consisting at least partially of plastic material, at least one of the piston elements having a Ring piston seal to the outside. Background technique

[0002] A piston of this type known from DE 3404095 A1 has two half-piston parts, which each consist of a metal lining and a housing cast on top. For the assembly of the piston, the half-piston parts are threaded axially continuously onto the journal of the piston rod and clamped together by means of a threaded bush screwed onto the piston rod. In order to fix the half-piston parts in a rotationally fixed manner relative to one another, mutually engaging elements, known as locking devices, can additionally be provided on the contact surfaces. Since the piston is not assembled until it is mounted on the piston rod, its implementation is relatively complex and presents great diff...

Claims

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