Press fit roller collar

Patent metadata

Field	Value
Publication number	US-12049266-B2
Application number	US-202017130248-A
Country	US
Kind code	B2
Filing date	Dec 22, 2020
Priority date	Dec 22, 2020
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

A track roller shaft comprises a body including a revolved surface defining an axis of rotation, a radial direction, and a circumferential direction disposed about the axis of rotation. The body also defines a proximate axial end disposed along the axis of rotation, a radially extending hole that is disposed axially adjacent to the proximate axial end, and a guide member receiving pocket disposed axially farther away from the proximate axial end than the radially extending hole.

First claim

What is claimed is:

1. A track roller collar comprising:
a body including a concave surface of revolution defining an axis of rotation, a radial direction, and a circumferential direction disposed about the axis of rotation, the body defining:
a first axial end disposed along the axis of rotation and a second axial end disposed along the axis of rotation;
an aperture formed by the concave surface of revolution extending axially through the first axial end toward the second axial end; and
a guide member receiving slot that extends from the first axial end toward the second axial end,

wherein the concave surface of revolution includes a press fit portion defining a press fit diameter, and a slip fit portion defining a slip fit diameter that is greater than the press fit diameter, and
wherein the body defines a cross-bore that extends radially through the body, wherein the cross-bore is disposed axially at a circumferential border between the press fit portion and the slip fit portion of the concave surface of revolution, and wherein the guide member receiving slot extends past the circumferential border and is in communication with the cross-bore.

2. The track roller collar of claim 1 wherein the slip fit portion of the concave surface of revolution extends axially from the press fit portion to the second axial end.

3. The track roller collar of claim 1 wherein the guide member receiving slot is defined by a first flat surface that runs parallel to a plane that is tangent to the concave surface of revolution of the aperture, and a second flat surface that runs perpendicularly to the first flat surface, and further comprising:
an L-shaped flange disposed axially between the first axial end and the circumferential border, and extending radially outwardly from the body, terminating at a free end facing axially toward the first axial end, at least partially forming a face seal receiving cavity disposed radially between the concave surface of revolution and the free end of the L-shaped flange.

4. A track roller shaft comprising:
a body including a revolved surface defining an axis of rotation, a radial direction, and a circumferential direction disposed about the axis of rotation, the body defining:
a proximate axial end disposed along the axis of rotation;
a radially extending hole that is disposed axially adjacent to the proximate axial end, and
a guide member receiving pocket disposed axially farther away from the proximate axial end than the radially extending hole,

wherein the guide member receiving pocket includes a first radially extending wall, a second radially extending wall spaced axially away from the first radially extending wall, and a bottom wall extending axially between the first radially extending wall and the second radially extending wall, and
wherein the guide member receiving pocket defines a rectangular perimeter in a plane that is parallel to a tangent plane of the revolved surface, and the bottom wall is flat and defines a bottom wall surface area that is greater than the surface area of the first radially extending wall.

5. The track roller shaft of claim 4 , wherein the guide member receiving pocket further defines a first blend connecting the first radially extending wall to the bottom wall, and a second blend connecting the bottom wall to the second radially extending wall.

6. The track roller shaft of claim 5 wherein the revolved surface defines a constant diameter from the guide member receiving pocket to the proximate axial end.

7. A track roller assembly comprising:
a track roller shell including:
a body of revolution defining an axis of rotation, a circumferential direction disposed about the axis of rotation, a radial direction extending normal to the axis of rotation, a first axial extremity disposed along the axis of rotation, and a second axial extremity disposed along the axis of rotation, the body of revolution further including
a first rim portion disposed proximate to the first axial extremity and a second rim portion disposed proximate to the second axial extremity; and
a thru-hole extending axially through the body of revolution;

a shaft that is disposed in the thru-hole;
a press fit collar defining a shaft receiving aperture defining a press fit portion that is configured to receive the shaft, wherein the press fit collar defines an axially extending slot that is in communication with the press fit portion of the shaft receiving aperture of the press fit collar; and
a guide member,
wherein the shaft defines a guide member receiving pocket that is in communication with the axially extending slot of the press fit collar, and
wherein at least a portion of the guide member is disposed within the axially extending slot and the guide member receiving pocket.

8. The track roller assembly of claim 7 wherein the shaft includes a cylindrical body defining a cylindrical diameter and the press fit portion of the shaft receiving aperture defines an inner diameter that is less than or equal to the cylindrical diameter.

9. The track roller assembly of claim 7 wherein the body of revolution of the track roller shell defines a first face seal receiving cavity that is disposed radially inwardly from the first rim portion, and the press fit collar includes an L-shaped flange that defines a second face seal receiving cavity that is in communication with the first face seal receiving cavity.

10. The track roller assembly of claim 9 further comprising a face seal that is disposed in the first face seal receiving cavity, and the second face seal receiving cavity.

11. The track roller assembly of claim 10 further comprising a bearing member that is disposed radially between the track roller shell and the shaft, and axially between the press fit collar and the track roller shell.

12. The track roller assembly of claim 11 wherein the press fit portion of the shaft receiving aperture of the press fit collar is disposed axially adjacent to the bearing member, and the shaft receiving aperture enlarges to form a slip fit portion that extends axially away from the press fit portion.

13. The track roller assembly of claim 12 wherein the press fit collar defines a thru-bore that extends radially through the slip fit portion of the shaft receiving aperture.

14. The track roller assembly of claim 13 wherein the shaft defines a cross-bore that is radially, and axially aligned with the thru-bore of the press fit collar, and further comprising a dowel pin that is disposed in the cross-bore, and the thru-bore.

15. The track roller collar of claim 1 wherein the body is formed of iron, grey-iron, or steel.

16. The track roller shaft of claim 4 wherein the body is formed of iron, grey-iron, or steel.

17. The track roller assembly of claim 7 wherein the track roller shell is formed of iron, grey-iron, or steel.

18. The track roller assembly of claim 17 wherein one or more of the shaft, the press fit collar, or the guide member is formed of iron, grey-iron, or steel.

19. The track roller assembly of claim 9 wherein the L-shaped flange extends radially outwardly from the body of the press fit collar, terminating at a free end facing axially toward the first axial extremity.

Assignees

• Caterpillar Inc

Inventors

• Umbach Brian B
• Suanno Gennaro
• Recker Roger L
• Mathien Daniel E
• Call Jr Dale T
• Heise Jordan M
• Magner Scott H

Classifications

• F16C2220/60

  by removing material, e.g. machining · CPC title

• F16C2220/46

  by forging · CPC title

• F16C2204/60

  Ferrous alloys, e.g. steel alloys · CPC title

• F16C17/10

  for both radial and axial load · CPC title

• F16C3/02

  Shafts; Axles · CPC title