Track pin retention system and method

Patent metadata

Field	Value
Publication number	US-9403565-B2
Application number	US-201213568652-A
Country	US
Kind code	B2
Filing date	Aug 7, 2012
Priority date	Aug 7, 2012
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

The disclosure may provide a method of forming a track assembly. In the method, a track pin may be disposed within a first through hole of a first track link and within a second through hole of a second track link. A force may be applied to a tool positioned in a first position to plastically deform a first portion of the first track link which surrounds the first through hole, to thereby form a first connection between the track pin and the first track link. A force may be applied to the tool positioned in a second position to plastically deform a second portion of the first track link which surrounds the first through hole, to thereby form a second connection between the track pin and the first track link. The second connection may be formed after the first connection.

First claim

What is claimed is:

1. A method of forming a track assembly, comprising:
disposing a track pin within a first through hole of a first track link and within a second through hole of a second track link;
applying a force to a swaging tool positioned in a first position to plastically deform a first portion of the first track link which surrounds the first through hole, to thereby form a first connection between the track pin and the first track link;
repositioning the swaging tool form the first position to a second position; and
applying a force to the swaging tool positioned in the second position to plastically deform a second portion of the first track link which surrounds the first through hole, to thereby form a second connection between the track pin and the first track link, the second connection being formed after the first connection.

2. The method of claim 1 , wherein the track pin includes a channel, and
wherein applying the force to the swaging tool positioned in the first position results in material of the first track link flowing into the channel.

3. The method of claim 1 , wherein applying the force to the swaging tool positioned in the first position includes using a press to apply the force to the tool.

4. The method of claim 1 , further including:
rotating the swaging tool about an axis to position the tool in the second position.

5. The method of claim 1 , further including:
rotating the swaging tool about a rotational axis off of the tool which is approximately parallel to an axis of the first through hole, to thereby position the swaging tool in the second position.

6. The method of claim 1 , further including:
applying forces to the swaging tool positioned in additional positions to plastically deform additional portions of the first track link which surround the first through hole, to thereby form additional connections between the track pin and the first track link.

7. The method of claim 1 , further including:
repositioning the swaging tool and applying forces to the swaging tool to plastically deform the first track link around approximately an entire circumference of the track pin.

8. A method of forming an endless track assembly for a mobile machine, comprising:
disposing a first track link and a second track link in a fixture such that axes of through holes formed in the first and second track links are approximately co-linear and parallel; disposing a track pin within the through holes such that an interference fit is achieved between the pin and the through hole in the first track link;
aligning an end face of the track pin with an end face of a boss that surrounds the through hole in the first track link, such that the end faces are approximately coplanar;
applying a force to a swaging tool positioned in a first position to plastically deform a first portion of the boss, to thereby flow material from the boss into a channel of the track pin to form a first connection between the track pin and the first track link;
repositioning the swaging tool from the first position to a second position; and
applying a force to the swaging tool positioned in the second position to plastically deform a second portion of the boss, to thereby flow material from the boss into the channel to form a second connection between the track pin and the first track link.

9. The method of claim 8 , wherein applying the force to the swaging tool positioned in the first position includes using a press to apply the force to an orbital swaging tool.

10. The method of claim 8 , further including:
rotating the tool about an axis to position the swaging tool in the second position.

11. The method of claim 8 , further including:
rotating the swaging tool about a rotational axis off of the tool which is approximately parallel to an axis of the boss, to thereby position the swaging tool in the second position.

12. The method of claim 8 , further including:
rotating the swaging tool about a rotational axis off of the swaging tool which is approximately parallel to the axis of the boss, while maintaining the swaging tool at a non-zero degree angle, to thereby position the swaging tool in the second position.

13. The method of claim 8 , further including:
applying forces to the swaging tool in a number of position to plastically deform other portions of the boss, to thereby form additional connections between the track pin and the first track link.

14. The method of claim 8 , further including:
applying forces to the swaging tool to plastically deform the boss around an entire circumference of the track pin.

15. The method of claim 8 , further including
applying forces to the tool to plastically deform the boss around less than an entire circumference of the track pin.

Assignees

• Dumitru Mircea
• Yaniak Thomas John
• Caterpillar Inc

Inventors

• Dumitru Mircea
• Yaniak Thomas John

Classifications

• F16G15/06

  Shackles designed for attachment by joint pins to chain elements, e.g. D-shackles {so called harp links; the D-chain links are classified according to the corresponding kind of chain} · CPC title

• Y10T29/49833

  Punching, piercing or reaming part by surface of second part · CPC title

• Y10T29/49954

  Fastener deformed after application · CPC title

• Y10T29/49938

  Radially expanding part in cavity, aperture, or hollow body · CPC title

• Y10T29/49908

  Joining by deforming · CPC title