Ring type hydraulic tensioner

Ring type hydraulic tensioner

  • CN 1,707,137 A
  • Filed: 04/29/2005
  • Published: 12/14/2005
  • Est. Priority Date: 06/04/2004
  • Status: Active Application
First Claim
Patent Images

1. ring type hydraulic tensioner, it comprises having columniform housing with piston receiving bore of inner peripheral wall, can in this piston receiving bore, slide and from the columniform piston of the circle of wherein stretching out, at the indoor piston bias spring of the high-voltage oil cavity that forms by piston and piston receiving bore, described spring promotes piston along stretching out direction, and check valve unit, its permission oil flows into the indoor and described chamber of prevention oil outflow of described high-voltage oil cavity, wherein, improvement comprises the annular groove in the excircle that is formed on piston, with be arranged in the described annular groove and resilient towards the described inner peripheral wall biasing of this piston receiving bore, but the clasp of radial dilatation, described ring is installed in the described groove, has axial clearance and has radial clearance in the depth of groove direction in the recess width direction.

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