Thrust bias detection system

• US 9,557,244 B2
• Filed: 11/10/2014
• Issued: 01/31/2017
• Est. Priority Date: 11/10/2014
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Rust, Craig Richard
• Primary Examiner(s): Tankersley, Blake A
• Assistant Examiner(s): NGUYEN, QUANG X.L.
• Application Number:
  US14/537,204
• Publication Number:
  US 20160131544A1
• Time in Patent Office: 813 Days
• US Class Current: 1/1
• CPC Class Codes: B62D 55/08 Endless track units; Parts thereof
• CPC Class Codes: G01M 13/023 Power-transmitting endless elements, e.g. belts or chains
• CPC Class Codes: G01M 17/03 Endless-tracks

Abstract

A thrust bias detection system for a mobile machine is disclosed. The mobile machine may have a first track assembly and a second track assembly. The thrust bias detection system may have a first wear sensor configured to generate a signal indicative of a first wear measurement of a first track link surface, and a second wear sensor configured to generate a signal indicative of a second wear measurement of a second track link surface. The thrust bias detection system may also have a controller in communication with the first and second wear sensors and configured to determine whether at least one of the first and second track assemblies has experienced thrust bias, based on the signals.

Claims

1. A thrust bias detection system for a mobile machine having a first track assembly and a second track assembly, the thrust bias detection system comprising:

a first wear sensor configured to generate a signal indicative of a first wear measurement of a first track link surface;

a second wear sensor configured to generate a signal indicative of a second wear measurement of a second track link surface; and

a controller in communication with the first and second wear sensors and configured to determine whether at least one of the first and second track assemblies has experienced thrust bias, based on the signals.

2. The thrust bias detection system of claim 1, wherein determining whether at least one of the first and second track assemblies has experienced thrust bias includes comparing the first wear measurement to the second wear measurement.

3. The thrust bias detection system of claim 2, wherein determining whether at least one of the first and second track assemblies has experienced thrust bias includes comparing a difference between the first wear measurement and the second wear measurement to a threshold amount.

4. The thrust bias detection system of claim 1, wherein the first track link surface and the second track link surface are located in the first track assembly.

5. The thrust bias detection system of claim 4, wherein:

each of the first and second track assemblies includes a pair of parallel tracks, and

the first track link surface and the second track link surface are located in different tracks of the pair of parallel tracks in the first track assembly.

6. The thrust bias detection system of claim 1, wherein the first track link surface is located in the first track assembly and the second track link surface is located in the second track assembly.

7. The thrust bias detection system of claim 6, wherein:

each of the first and second track assemblies includes an inside track and an outside track, and

the first track link surface is located in the inside track of the first track assembly and the second track link surface is located in the inside track of the second track assembly.

8. The thrust bias detection system of claim 1, further including a third wear sensor configured to generate a signal indicative of a third wear measurement of a third track link surface.

9. The thrust bias detection system of claim 8, wherein determining whether at least one of the first and second track assemblies has experienced thrust bias includes comparing the first, second, and third wear measurements to each other.

10. The thrust bias detection system of claim 8, wherein the first track link surface and the second track link surface are located in the first track assembly and the third track link surface is located in the second track assembly.

11. The thrust bias detection system of claim 1, wherein the first wear sensor includes a wear component configured to wear with the first track link surface.

12. The thrust bias detection system of claim 11, wherein the first wear sensor further includes a processor configured to communicate with the controller.

13. The thrust bias detection system of claim 11, wherein the first track link surface is a side wall of a track link, the side wall being angled with respect to an engagement surface of the track link.

14. A method of detecting thrust bias in a mobile machine having a first track assembly and a second track assembly, the method comprising:

measuring a first amount of wear of a first track link surface;

measuring a second amount of wear of a second track link surface;

comparing a difference between the first amount of wear and the second amount of wear to a threshold value;

determining whether at least one of the first and second track assemblies has experienced thrust bias based on the comparison.

15. The method of claim 14, wherein the first track link surface and the second track link surface are located in the first track assembly.

16. The method of claim 15, wherein:

each of the first and second track assemblies includes a pair of parallel tracks, and

the first track link surface and the second track link surface are located in different tracks of the pair of parallel tracks in the first track assembly.

17. The method of claim 14, wherein the first track link surface is located in the first track assembly and the second track link surface is located in the second track assembly.