Cam follower roller device

Patent metadata

Field	Value
Publication number	US-9664266-B2
Application number	US-201314093396-A
Country	US
Kind code	B2
Filing date	Nov 29, 2013
Priority date	Nov 29, 2012
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A cam follower roller device, in particular for a fuel injection pump of an internal combustion engine, includes a tappet with a sleeve having an opening for partially accommodating a roller, a roller mounted rotatably in the sleeve and having a portion which protrudes axially from the opening of the sleeve provided to cooperate with a cam, and a roller support body housed in the sleeve. The roller includes a cylindrical spindle and a cylindrical body, the ends of the spindle projecting from the lateral faces of the body. The support body includes supports open towards the opening of the sleeve and supporting the ends of the spindle.

First claim

The invention claimed is:

1. A cam follower roller device comprising:
a tappet having a sleeve including an opening adapted to partially accommodate a roller, wherein the roller is rotatably mounted to the sleeve and has a portion which protrudes axially from the opening of the sleeve, and the roller includes a spindle and a cylindrical body, the cylindrical body being mounted on the spindle such that the cylindrical body configured to rotate with respect to the spindle, ends of the spindle projecting from lateral faces of the cylindrical body;
a support body for the roller that is housed in the sleeve, the support body including supports which contact and support the ends of the spindle, the support body being seated against a base of the sleeve and positioned between the ends of the spindle and the base, the roller being spaced apart from the base by the support body, and the support body being spaced from the cylindrical body such that no portion of the support body contacts the cylindrical body; and
a deformation of an axial end of the opening of the sleeve produced after the support body and the roller have been inserted such that the deformation is configured to retain the roller in the sleeve during transportation, wherein the support body is cylindrical and is positioned coaxially with the sleeve.

2. The cam follower roller device according to claim 1 , wherein the supports have semi-circular profiles that open towards the opening of the sleeve.

3. The cam follower roller device according to claim 1 , wherein the base of the sleeve is fixed in the sleeve by a press fit.

4. The cam follower roller device according to claim 3 , wherein the base of the sleeve is fixed in the sleeve by a press fit in combination with external deformation of the sleeve.

5. The cam follower roller device according to claim 4 , wherein the support body is produced from a strip of sheet metal cut and bent to form a ring shape.

6. The cam follower roller device according to claim 1 , wherein the support body is ring-shaped and wherein an outer diameter surface of the support body faces an inner diameter surface of the sleeve.

7. The cam follower roller device according to claim 6 , wherein the outer diameter surface of the support body engages the inner diameter surface of the sleeve.

8. A cam follower roller device comprising:
a tappet having a sleeve including an opening adapted to partially accommodate a roller, wherein the roller is rotatably mounted to the sleeve and has a portion which protrudes axially from the opening of the sleeve, and the roller includes a spindle and a cylindrical body, ends of the spindle projecting from lateral faces of the cylindrical body;
a support body for the roller that is housed in the sleeve, the support body including supports which support the ends of the spindle; and
retaining means for holding the roller in the sleeve during transportation, wherein the retaining means is implemented by a deformation of an axial end of the opening of the sleeve produced after the support body and the roller have been inserted,
wherein the support body is seated on a base of the sleeve,
wherein the base of the sleeve is fixed in the sleeve by a press fit, and
wherein the support body comprises a first plastic section having first and second circumferential ends, a second plastic section having third and fourth circumferential ends, a first metal support extending circumferentially between the first circumferential end of the first plastic section and the third circumferential end of the second plastic section, and a second metal support extending circumferentially between the second circumferential end of the first plastic section and the fourth circumferential end of the second plastic section,
the support body forms a ring when the first metal support is attached to the first circumferential end of the first plastic section and the third circumferential end of the second plastic section, and, the second metal support is attached to the second circumferential end of the first plastic section and the fourth circumferential end of the second plastic section.

9. A cam follower roller device comprising:
a tappet having a sleeve including an opening adapted to partially accommodate a roller, wherein the roller is rotatably mounted to the sleeve and has a portion which protrudes axially from the opening of the sleeve, and the roller includes a spindle and a cylindrical body, ends of the spindle projecting from lateral faces of the cylindrical body;
a support body for the roller that is housed in the sleeve, the support body including supports which support the ends of the spindle, the support body being seated against a base of the sleeve and positioned between the ends of the spindle and the base, the roller being spaced apart from the base by the support body, and the support body being spaced from the cylindrical body such that no portion of the support body contacts the cylindrical body;
retaining means for holding the roller in the sleeve during transportation, wherein the retaining means is implemented by a deformation of an axial end of the opening of the sleeve produced after the support body and the roller have been inserted;
wherein the support body is positioned coaxially with the sleeve, the support body being ring-shaped such that the support body comprises an axial through-hole, a portion of the cylindrical body being located within the axial through-hole of the support body such that a minimum radius of the support body is greater than a maximum radius of the cylindrical body.

Assignees

• Skf Ab

Inventors

• Hauvespre Benoît
• Van Der Mei Nijs

Classifications

• Y10T74/2107

  Follower · CPC title

• Y10T29/49547

  Assembling preformed components · CPC title

• F04B1/0439

  Supporting or guiding means for the pistons · CPC title

• F04B1/0426

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

• F02M59/102

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