Maintenance free extended life cam follower for a necker machine

Patent metadata

Field	Value
Publication number	US-11674584-B2
Application number	US-202117190012-A
Country	US
Kind code	B2
Filing date	Mar 2, 2021
Priority date	Nov 16, 2018
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

An axial retainment system for a shaft is provided. The axial retainment system includes a cylindrical body extending from an outboard end to an inboard end thereof, and a swaged ridge extending radially outward from the cylindrical body proximate the outboard end. The swaged ridge has an outboard axial surface facing toward the outboard end and extending radially outward and terminating at a radially outward facing circumferential surface. The swaged ridge has an inboard axial surface facing toward the inboard end and extending radially outward from the cylindrical body and terminating at the radially outward facing circumferential surface. The outboard axial surface of the swaged ridge is recessed axially inward from the outboard end of the shaft. The inboard axial surface of the swaged ridge is swaged against, conforms in shape to, and is compressed against a component to be axially retained on the shaft.

First claim

What is claimed is:

1. An axial retainment system for a shaft, the axial retainment system comprising:
the shaft extending from an outboard end to an inboard end;
a flange disposed between the outboard end and the inboard end; and
a protrusion extending radially outward from the shaft proximate the outboard end and terminating at a radially outward facing circumferential surface, the protrusion and the flange configured to axially retain a first bearing ring therebetween;
wherein the protrusion and the first bearing ring have different colors.

2. The axial retainment system of claim 1 , wherein the protrusion is defined by a first cylindrical surface extending axially inward from the outboard end and an outboard axial surface extending radially outward from the first cylindrical surface such that the outboard axial surface is recessed axially inward from the outboard end, the outboard axial surface extending radially to the radially outward facing circumferential surface.

3. The axial retainment system of claim 2 , wherein the outboard axial surface is substantially flat.

4. The axial retainment system of claim 2 , wherein the outboard end comprises a torque transmission aperture extending axially inward therefrom, the torque transmission aperture having a radially inward facing engagement surface, wherein the first cylindrical axial surface is spaced apart from the engagement surface by a neutral zone that extends a predetermined radial distance from the engagement surface to the first cylindrical surface, to prevent deformation of the engagement surface when forming the protrusion.

5. The axial retainment system of claim 1 , wherein the protrusion is formed by swaging.

6. The axial retainment system of claim 5 , wherein the protrusion is swaged to produce an inboard axial surface that is compressed against and conforms in shape to the first bearing ring.

7. The axial retainment system of claim 6 , wherein the inboard axial surface is curved.

8. The axial retainment system of claim 1 , wherein the first bearing ring includes an inner bearing diameter where the first bearing ring is attached to the shaft, wherein a protrusion diameter extending from an axial center axis of the shaft to the radially outward facing circumferential surface of the protrusion is greater than the inner bearing diameter where the first bearing ring is attached to the shaft.

9. The axial retainment system of claim 8 , wherein the protrusion diameter is approximately 4% to 6% greater than the inner bearing diameter.

10. The axial retainment system of claim 1 , wherein the flange has a shoulder extending axially outward toward the outboard end on an outboard axial surface of the flange.

11. The axial retainment system of claim 10 , further comprising a second bearing ring, the second bearing ring disposed against the outboard axial surface of the flange.

12. The axial retainment system of claim 1 , wherein the first bearing ring is an inner ring of a ball bearing, the ball bearing further comprising an outer ring and a plurality of rolling elements disposed between the inner and outer rings.

13. A cam follower comprising:
a shaft extending from an outboard end to an inboard end and having a first bearing ring disposed thereon;
wherein the shaft has an outboard diameter as measured from an axial center axis of the shaft where the first bearing ring is disposed thereon;
a flange radially extending from the shaft and disposed between the outboard end and the inboard end; and
a swaged ridge extending radially outward from the shaft proximate the outboard end and terminating at a radially outward facing circumferential surface, the swaged ridge and flange configured to axially retain the first bearing ring therebetween;
wherein the swaged ridge is defined by a first cylindrical surface extending axially inward from the outboard end and an outboard axial surface extending radially outward from the first cylindrical surface, the outboard axial surface extending radially from the first cylindrical surface to the radially outward facing circumferential surface;
wherein the outboard end comprises a torque transmission aperture extending axially inward therefrom, the torque transmission aperture having a radially inward facing engagement surface, wherein the first cylindrical surface is spaced apart from the engagement surface by a neutral zone that extends a predetermined radial distance from the engagement surface to the first cylindrical surface, to prevent deformation of the engagement surface when forming the swaged ridge; and
wherein the predetermined radial distance is approximately 25% of the outboard diameter.

14. The cam follower of claim 13 , wherein the first bearing ring is an inner ring of a rolling element bearing, the rolling element bearing further comprising:
an outer ring having an outer ring bearing surface and an exterior surface; and
a plurality of rolling elements disposed in an annular cavity between the inner and outer rings of the rolling element bearing.

15. The cam follower of claim 14 , wherein:
the outer ring is received in a tire,
the tire has a thickness and a crown radius,
the crown radius has an apex,
the inner ring and the outer ring are axially centered with respect to the apex,
a composition of the tire comprises at least one of a metallic material, a plastic material, and a non-metallic material,
the tire has a groove formed therein, extending radially outward and extending circumferentially therearound, and
a clip disposed at a depth in the groove.

16. The cam follower of claim 15 , wherein a ratio of the depth to the thickness is between 0.17 and 0.19.

17. The cam follower of claim 15 , wherein a first distance is defined between an exterior surface of the outer ring and axial center axis of the shaft, and a second distance is defined between the axial center axis of the shaft and an interior surface of the tire, wherein a ratio of the first distance to the second distance is between 1.000 and 1.015.

18. The cam follower of claim 14 , wherein the plurality of rolling elements is a plurality of spherical balls.

19. The cam follower of claim 14 , wherein the cam follower has a duty cycle, a bearing load capacity being selected based on the duty cycle.

20. The cam follower of claim 13 , wherein the swaged ridge is formed by swaging the outboard end of the shaft with a swage die, the swage die comprising a body having a first end configured to be mounted to a pressing device and a second end opposite the first end, the second end having a cylindrical extension extending from the second end away from the first end, the cylindrical extension having an end surface with a cylindrical punch cavity therein configured to engage and swage the outboard end of the shaft.

21. The cam follower of claim 13 , wherein the swaged ridge is swaged to produce an inboard axial surface that is compressed against and conforms in shape to the first bearing ring.

22. The cam follower of claim 21 , wherein the outboard axial surface of the swaged ridge is recessed axially inward from the outboard end of the shaft.

23. The cam follower of claim 21 , wherein the outboard axial surface of the swaged ridge is substantially flat.

24. The cam follower of claim 21 , wherein the inboard axial surface is arcuate.

25. The cam follower of claim 21 , wherein the first bearing ring is axially retained and compressed between the flange an

Assignees

• Roller Bearing Co America Inc

Inventors

• Pallini Robert
• Coppola Michael
• Albini Giovanni C

Classifications

• F16H53/06 Primary

  Cam-followers (F16H53/08 takes precedence) · CPC title

• B23Q5/342

  Cam followers (see also B23Q35/26) · CPC title

• F16C33/605

  with a separate retaining member, e.g. flange, shoulder, guide ring, secured to a race ring, adjacent to the race surface, so as to abut the end of the rolling elements, e.g. rollers, or the cage · CPC title

• F16C33/7843

  with a single annular sealing disc · CPC title

• F16C13/006

  Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one · CPC title