F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
F16H 19/00 (2006.01) F15B 15/08 (2006.01)
Patent
CA 2153961
A fluid-powered rotary actuator having a body with a cylindrical interior sidewall portion. A rotatable shaft extends generally coaxially within the body. The shaft has a grooved, outwardly facing sidewall portion positioned within the body. A ring gear is positioned generally coaxially within the body and extends about the shaft. The ring gear has a grooved, inwardly facing sidewall portion. The ring gear is formed as a separate part from the body and the ring gear grooved sidewall portion is formed prior to positioning of the ring gear in the body. The ring gear is fixedly attached to the body to prevent rotation therebetween by a weld between the ring gear and the body interior sidewall portion. A stop member is engaged by the ring gear to limit movement of the ring gear toward the body first end during assembly of the ring gear in the body. In one embodiment, the ring gear is welded to a stop shoulder. A piston sleeve is mounted for reciprocal axial movement within the body in response to the selective application pressurized fluid thereto. A sleeve portion thereof has a grooved, inwardly facing sidewall portion engaging the shaft grooved sidewall portion and a grooved, outwardly facing sidewall portion engaged with the ring gear grooved sidewall portion to translate axial movement of the piston into clockwise or counterclockwise relative rotational movement between the shaft and the body. A method of manufacturing the actuator is also disclosed which includes forming the ring gear grooved sidewall prior to positioning of the ring gear in the body, and after positioning the ring gear in the body, fixedly attaching the ring gear to the body to prevent rotation therebetween by forming a weld between an attachment portion of the ring gear which projects axially away from the ring gear grooved sidewall portion and is axially spaced apart from the ring gear grooved sidewall portion by a separation distance sufficiently large that the heat of the weld does not distort the ring gear sufficient to impair operation of the actuator.
1994 Weyer Family Limited Partnership
Oyen Wiggs Green & Mutala Llp
LandOfFree
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