Three roller rocker arm with pump-down stop
AssigneeEaton Intelligent Power Limited
InventorsMatthew A. Vance, Dale Arden Stretch
Life of this patent
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Abstract
A rocker arm comprises a first outer arm and a second outer arm joined by a pivot body, the first outer arm comprising an inner side, the inner side comprising a limiting surface. An actuatable latch mechanism is within the pivot body. A first inner arm and a second inner arm are joined by a latch arm. An axle joins the first inner arm and the second inner arm to pivot between the first outer arm and the second outer arm. A second axle is between the first inner arm and the second inner arm. A pin extends from the second axle towards the first outer arm, and the pin is configured to pivot towards and away from the limiting surface when the first inner arm and the second inner arm pivot between the first outer arm and the second outer arm.
Claims28
A rocker arm, comprising:
- a first outer arm and a second outer arm joined by a pivot body, the first outer arm comprising:
- an outer side comprising an integrally formed cantilevered post;
- an inner side comprising a limiting surface;
- and
- a post receptacle through the integrally formed cantilevered post and connected by a groove to the limiting surface;
- a roller on the integrally formed cantilevered post;
- an actuatable latch mechanism within the pivot body;
- an inner arm comprising a bearing surface, a latch arm, and a control pin mount;
- a pivot axle joining the first outer arm, the second outer arm, and the inner arm to pivot the latch arm between the first outer arm and the second outer arm;
- and
- an adjustable pin extending from the control pin mount towards the groove, the adjustable pin configured to travel towards and away from the limiting surface when the latch arm pivots.
A type II valvetrain, comprising:
- a rocker arm, comprising:
- a first outer arm and a second outer arm joined by a pivot body,
- the first outer arm comprising:
- an outer side comprising an integrally formed cantilevered post;
- an inner side comprising a limiting surface;
- a post receptacle through the integrally formed cantilevered post and connected by a groove to the limiting surface;
- and
- a roller on the integrally formed cantilevered post;
- the second outer arm comprising a second roller on a second cantilevered post;
- an actuatable latch mechanism within the pivot body;
- an inner arm comprising a bearing surface, a latch arm, and a control pin mount;
- a pivot axle joining the first outer arm, the second outer arm, and the inner arm to pivot the latch arm between the first outer arm and the second outer arm;
- and
- an adjustable pin extending from the control pin mount towards the groove, the adjustable pin configured to travel towards and away from the limiting surface when the latch arm pivots;
- and
- first, second, and third rotating cam lobes, where the first cam lobe is configured to press upon the roller of the first outer arm, where the second cam lobe is configured to press upon the second roller of the second outer arm, and, wherein the third cam lobe is configured to press upon the bearing surface of the inner arm to selectively push the latch arm to pivot past the actuatable latch mechanism when the actuatable latch mechanism is in an unlatched position,
- wherein the adjustable pin moves in the groove relative to the post receptacle when the latch arm pivots.
A rocker arm, comprising:
- a first outer arm and a second outer arm joined by a pivot body,
- the first outer arm comprising:
- an outer side comprising an integrally formed cantilevered post;
- an inner side;
- a post receptacle coupled to the inner side through the integrally formed cantilevered post;
- and
- a roller on the integrally formed cantilevered post;
- the second outer arm comprising a second roller on a second cantilevered post;
- an actuatable latch mechanism within the pivot body;
- an inner arm pivotable with respect to the first outer arm and the second outer arm, the inner arm comprising an overhang extending towards the inner side;
- and
- an adjustable pin inserted into the post receptacle and configured to selectively contact the overhang when the inner arm pivots.
A method for adjusting lash in a rocker arm, comprising:
- inserting a pin comprising a tapered portion and a body portion into a receptacle through a cantilevered post of an outer arm of the rocker arm, the cantilevered post seating a roller;
- and
- adjusting the body portion of the pin in a control pin mount of an axle of an inner arm of the rocker arm while adjusting a depth of the tapered portion in the receptacle of the outer arm to thereby adjust lash in the rocker arm.
A method for adjusting lash in a rocker arm, comprising:
- inserting a pin through a tapered receptacle through a cantilevered post of an outer arm of the rocker arm, the cantilevered post seating a roller;
- and
- inserting the pin into a control pin mount in an axle of an inner arm of the rocker arm to adjust a depth of the pin in the tapered receptacle and thereby adjust lash in the rocker arm.
Dependencies are inferred from the claim text.