ACTUATOR WITH SCREW-IN GLAND AND DETENT STRUCTURE

摘要

A fluid actuator includes housing defining a cylinder bore and first and second fluid passages. A circumferential detent groove extends into the housing from the cylinder bore. The cylinder bore receives a piston having a top face and a skirt in sliding engagement. A circumferential detent ring groove extends radially inwardly into the skirt. The detent ring groove has a first portion of a first depth and a second portion of a second, greater depth. An o-ring is at least partially received in the second portion. A wear ring is at least partially received in the first portion and overlies the o-ring. The o-ring biases the wear ring outwardly of the detent ring so that the wear ring may be selectively engaged with the detent groove.

主权项

1. A fluid actuator comprising:
a housing having a first end and a second end, the housing defining;
a cylinder bore extending from the first end of the housing to the second end of the housing, the cylinder bore having a first threaded portion proximate the first end of the housing and a second threaded portion proximate the second end of the housing;a circumferential detent groove extending into the housing from the cylinder bore, the circumferential detent groove located between the first threaded portion and the second threaded portion;a first fluid passage extending from the first end of the housing toward the second end of the housing; anda second fluid passage connecting the first fluid passage and the cylinder bore in fluid communication;
a first cylinder end cap having a first side and a second side, the first cylinder cap threadingly engaged with the first threaded portion, the first cylinder cap defining a third fluid passage extending from the first side thereof to the second side thereof; a second cylinder end cap having a first side and a second side, the second cylinder cap threadingly engaged with the second threaded portion, the second cylinder cap defining an aperture extending from the first side thereof to the second side thereof; a piston slidably received in the cylinder bore between a first travel limit proximate the first cylinder end cap and a second travel limit proximate the second cylinder end cap, the piston having a top face and a skirt, the top face of the piston facing the first cylinder end cap, the skirt defining a circumferential detent ring groove, the detent ring groove having a first region having a first depth and a second region having a second depth, the second depth being greater than the first depth; a piston rod connected to and extending from the piston opposite the top face, the piston rod slidingly engaged with the aperture in the second cylinder end cap; an o-ring at least partially disposed in the second region of the detent ring groove; and a wear ring at least partially disposed in the detent ring groove and overlying the o-ring; wherein the wear ring is selectively engageable with the detent groove.