A rubber piston with good anti-aging properties

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By incorporating auxiliary support mechanisms and heat dissipation structures within the rubber piston, the aging problem caused by stress concentration in large-diameter rubber pistons is solved, achieving high resilience and high temperature resistance, and extending the service life of the rubber piston.

CN224706275UActive Publication Date: 2026-09-01XINGTAI TONGYI MASCH EQUIP CO LTD

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Patent Information

Application Number: CN202522012760.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2025-09-18
Publication Date: 2026-09-01
Estimated Expiration: 2035-09-18

Application Information

Patent Timeline

18 Sep 2025

Application

CN202522012760.0

01 Sep 2026

Publication

CN224706275U

IPC: F16J1/04

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Application Domain

Plungers Trunk pistons

Technology Topics

Annular array Physics

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AI Technical Summary

Technical Problem

Large-diameter rubber pistons are prone to deformation and accelerated aging due to stress concentration, which affects their service life.

Method used

An auxiliary support mechanism, including rubber reinforcing ribs and annular ribs, is provided in the second circular groove of the rubber piston to disperse stress. The density is reduced by a regular hexagonal cavity and heat dissipation holes and grooves are provided to enhance heat dissipation.

Benefits of technology

It effectively avoids deformation and aging caused by stress concentration, improves resilience and heat dissipation, and extends the service life of rubber pistons.

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Abstract

This utility model relates to a rubber piston, and discloses a rubber piston with good anti-aging properties. It includes a rubber piston body, with a first circular groove formed on one inner wall and a second circular groove formed on the inner wall of the side of the rubber piston body away from the first circular groove. The interior of the second circular groove communicates with the interior of the first circular groove, and the diameter of the second circular groove is smaller than that of the first circular groove. An auxiliary support mechanism is provided on the inner sidewall of the second circular groove. The auxiliary support mechanism is used to disperse stress and prevent deformation and aging. The auxiliary support mechanism includes a plurality of rubber reinforcing ribs uniformly fixedly connected in a circular array to the inner sidewall of the second circular groove. A plurality of rubber blocks are uniformly fixedly connected to the inner sidewall of the second circular groove between adjacent rubber reinforcing ribs. Compared with the traditional method of using homogeneous rubber or simple circular ribs, this utility model allows stress to be more easily dispersed, avoiding the problem of accelerated deformation and aging of the rubber piston body due to stress concentration.

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