Mechanical system forming a cam follower or a rocker arm

Patent metadata

Field	Value
Publication number	US-9933062-B2
Application number	US-201514867009-A
Country	US
Kind code	B2
Filing date	Sep 28, 2015
Priority date	Sep 30, 2014
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A mechanical system forms a cam follower or a rocker arm. The mechanical system comprises: a support element, a pin extending between two opposite ends along a first axis and supported by the support element, and a roller adapted to receive the pin. The roller being mounted on pin, movable in rotation relative to the pin around the first axis and adapted to roll on a cam. The support element comprises two separate parts, generally semi-cylindrical, each having a contact face, in contact with one other, and a holding feature for maintaining parts assembled together.

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 having an annular bearing portion with a first diameter and an annular holding portion with a second diameter which is less than the first diameter such that an annular shoulder is formed between the annular bearing portion and the annular holding portion,
a pin extending between two opposite ends along a first axis and supported by the support element, and
a roller adapted to receive the pin, mounted on the pin, movable in rotation relative to the pin around the first axis and adapted to roll on a cam,
wherein the support element comprises:
two separate parts generally semi-cylindrical, each having a contact face, in contact with each other, and
a holding ring formed by an annular sleeve configured for positioning over the annular holding portion such that when the holding ring is fully positioned over the holding portion an annular lubricating groove is formed between the annular shoulder and the holding ring while the holding ring maintains the two separate parts assembled together.

2. The mechanical system according to claim 1 , wherein two separate parts are identical.

3. The mechanical system according to claim 1 , wherein the contact faces are perpendicular to the first axis.

4. The mechanical system according to claim 1 , further comprising assembly pins fitted in cavities managed in the contact face of each part of the support element.

5. The mechanical system according to claim 4 , wherein the holes are blind and block the translation of the pin along the first axis.

6. The mechanical system according to claim 1 , wherein the external surface of the support element includes two anti-rotational grooves, each anti-rotational groove having a first portion belonging to a first part of the support element, and a second portion belonging to a second part of the support element.

7. The mechanical system according to claim 1 , wherein the first holding ring is fitted around a first end of the support element.

8. The mechanical system according to claim 7 , wherein the holding system includes a second holding ring fitted around a second end of the mechanical element, blocking the translation of the pin along first axis.

9. The mechanical system according to claim 7 , wherein the holding ring is fretted on the support element.

10. The mechanical system according to claim 1 , wherein each part of the support element has a hole supporting an end of the pin.

11. The mechanical system according to claim 10 , wherein the holes are through holes.

12. The mechanical system according to claim 1 , further comprising a positional guiding element positioned at the interface between the pin and the roller element, wherein the positional guiding element is one of a rolling bearing, a sliding bearing or a bushing.

Assignees

• Berruet Nicolas
• Champalou Francois
• Viault Samuel
• Skf Ab

Inventors

• Berruet Nicolas
• Champalou François
• Viault Samuel

Classifications

• F01L2305/00

  Valve arrangements comprising rollers · CPC title

• F04B1/0426

  Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam · CPC title

• F01L1/18 Primary

  Rocking arms or levers · CPC title

• F01L1/143

  for use with overhead camshafts · CPC title

• F04B1/0417

  consisting of two or more cylindrical elements, e.g. rollers · CPC title