Mechanical system forming a cam follower or a rocker arm, injection pump or valve actuator comprising such a mechanical system and method for manufacturing such a mechanical system

Patent metadata

Field	Value
Publication number	US-2016160986-A1
Application number	US-201514945574-A
Country	US
Kind code	A1
Filing date	Nov 19, 2015
Priority date	Nov 27, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

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.

First claim

What is claimed is:

1 . 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 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 comprising 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; and an insert inserted in the support element and supporting the pin opposite the first axial abutment feature, wherein the first axial abutment feature protrude outside a cavity delimited by the support element and receiving the pin.

2 . The mechanical system according to claim 1 , the support element further comprising a cylindrical wall extending around pin and blocking the translation of the pin along the first axis.

3 . The mechanical system according to claim 1 , wherein the pin assembly includes only the pin.

4 . The mechanical system according to claim 1 , wherein the pin assembly further includes the insert.

5 . The mechanical system according to claim 1 , wherein the insert is in a single piece and has holding members supporting the pin ends.

6 . The mechanical system according to claim 1 , wherein the insert is made from separate parts and further includes a first holding portion and a second holding portion supporting the pin.

7 . The mechanical system according to claim 1 , wherein the insert is one of glued or press-fitted inside the support element.

8 . The mechanical system according to claim 1 , further comprising a second abutment feature blocking the translation of the pin assembly and of the insert, in a second direction opposite the first direction and in that the second abutment feature include protrusions made by stamping a cylindrical wall of the support element.

9 . The mechanical system according to claim 1 , wherein the mechanical system is integrated into an injection pump for a motor vehicle.

10 . The mechanical system according to claim 1 , wherein the mechanical system is integrated into a valve actuator for a motor vehicle.

11 . A method for manufacturing a mechanical system, 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 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 comprising 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; and an insert inserted in the support element and supporting the pin opposite the first axial abutment feature, wherein the first axial abutment feature protrude outside a cavity delimited by the support element and receiving the pin, the method comprising steps of: assembling the pin and the roller together; inserting the pin and the roller into the support element until the pin assembly comes into contact with the first axial abutment feature; and inserting the insert into the support element until it comes into contact with the pin.

12 . A method for manufacturing a mechanical system, 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 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 comprising 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; and an insert inserted in the support element and supporting the pin opposite the first axial abutment feature, wherein the first axial abutment feature protrude outside a cavity delimited by the support element and receiving the pin, wherein the insert is made from separate parts and further includes a first holding portion and a second holding portion supporting the pin, wherein each holding portion has a cylindrical recess having a diameter roughly equal to the diameter of the pin, the method comprising steps of: assembling the pin and the roller together; assembling the holding portions of the insert with the pin, wherein the pin ends are located inside the cylindrical recesses; and inserting the pin assembly inside the support element until it comes into abutment with the first axial abutment feature.

Assignees

• Berruet Nicolas
• Champalou François
• Hauvespre Benoît
• Jouanno Guillaume
• Viault Samuel
• Skf Ab

Inventors

• Berruet Nicolas
• Champalou François
• Hauvespre Benoît
• Jouanno Guillaume
• Viault Samuel

Classifications

• F01L2305/02

  Mounting of rollers · CPC title

• F01L2307/00

  Preventing the rotation of tappets · CPC title

• F01L2305/00

  Valve arrangements comprising rollers · CPC title

• F04B9/042

  the means being cams · CPC title

• F02M59/102 Primary

  Mechanical drive, e.g. tappets or cams (F02M45/063 takes precedence) · CPC title