摘要:
The cam follower roller device including a body, a shaft mounted on the body, a roller mounted on the shaft in a rotationally movable manner, and at least one friction element mounted on the shaft axially between the roller and the body. The friction element is separate from the body and from the roller.
摘要:
The cam follower roller device comprises a body, a shaft mounted on the body, a roller mounted on the shaft and able to rotate, and a plain bearing interposed radially between the shaft and the roller. An outer surface and/or an inner surface of the plain bearing comprise a plurality of cavities. The ratio of the sum of the surfaces areas of the cavities to the total surface area of the outer surface, or of the inner surface, in which the cavities are formed is between 2% and 40%. The cavities have a depth between 0.5 μm and 5 μm.
摘要:
A mechanical system, comprising a support element having an outer surface adapted to slide in a housing receiving the mechanical system, a pin extending along a first axis and comprising two opposite ends, each adapted to be fitted in the support element for radial and/or axial retention of the pin relative to the first axis, and a roller element movable in rotation relative to the pin around the first axis. The mechanical system comprises at least one outer insert positioned at the outer surface of the support element. The mechanical system can be integrated into either an injection pump or a valve actuator.
摘要:
A method for manufacturing a roller, adapted to equip a mechanical system forming a cam follower or a rocker arm. The roller is centered on a central axis and comprising: an outer cylindrical surface adapted to roll on a cam, an inner cylindrical bore adapted to receive a pin belonging to the mechanical system, and two lateral faces extending radially to the central axis. The method includes a machining step forming circular grooves that are concentric with each other on at least one of the lateral faces of the roller. The roller can be installed within a mechanical system.
摘要:
A mechanical system forms a cam follower or a rocker arm and includes a support element, a pin extending between two opposite ends along a first axis and supported by the support element, and a roller mounted on the pin, movable in rotation relative to the pin around the first axis and adapted to roll on a cam. The support element includes a first axial abutment feature blocking the translation of a pin assembly including at least the pin, in a first direction parallel to a second axis perpendicular to the first axis. The mechanical system additionally includes an insert inserted in the support element and supporting the pin opposite the first axial abutment feature, wherein the first axial abutment feature protrudes outside a cavity delimited by the support element and receiving the pin.
摘要:
A mechanical system forming a cam follower or a rocker arm; the mechanical system including a support element, a pin extending between two opposite ends along a first axis and supported by the support element, and a roller mounted on the pin, movable in rotation relative to the pin around the first axis and adapted to roll on a cam. The mechanical system further includes an insert made from separate parts and including holding members supporting the pin ends.
摘要:
A cam follower unit comprising a tappet, a roller adapted to cooperate with a cam, the roller being mounted rotatably on a pin which is mounted in holes provided on two lateral ears of the tappet, the pin being retained in the tappet, in the longitudinal direction of the pin, by elastic spring retainers mounted against the ends of the pin, inside the holes of the lateral ears. The elastic spring retainers comprise a central portion adapted to be in contact with ends of the pin, the central portion defining a plane perpendicular to the central axis of the pin, and a peripheral portion adapted to exert a radial elastic force against an internal wall of the circular holes. The peripheral portion extends outwardly from the central portion and away from the pin along directions inclined with respect to the plane defined by the central portion.
摘要:
A mechanical system that forms one of a cam follower or a rocker arm. The mechanical system comprises a support element including a first body portion and a second body portion, a pin extending between two opposite ends along a first axis and supported by the first body portion of the support element, and a roller mounted on pin, movable in rotation relative to the pin around the first axis and adapted to roll on a cam. The mechanical system further comprises a spacing element comprising a first body portion connected to the second body part of the support element and a second body portion adapted to be supported by a movable support.
摘要:
A mechanical system forming one of a cam follower or a rocker arm, the mechanical system comprising: a support element; a pin extending between two opposite ends along a first axis and supported by the support element; and a roller movable in rotation relative to the pin around the first axis and adapted to roll on a cam. At least one recess is formed within the pin or roller, wherein the at least one recess provides a lubricant reservoir at an interface between the pin and the roller. The mechanical system can be integrated into an injection pump or a valve actuator. The mechanical system is manufactured by forming the at least one recess within the pin or roller and assembling the parts together, wherein the recess provides a lubricant reservoir at an interface between the pin and the roller.
摘要:
The cam follower roller device comprises a body, a shaft mounted on the body, and a roller mounted on the said shaft in a rotationally movable manner and comprising two end faces. Each of the said faces is arranged at least in part axially facing an inner wall of the body. At least one of the end faces of the roller and/or at least one of the said inner walls of the body comprise an antifriction and wear-resistant coating.