Vehicle track undercarriage adjustment system

• US 6,401,847 B1
• Filed: 11/08/1996
• Issued: 06/11/2002
• Est. Priority Date: 11/08/1996
• Status: Expired due to Term

• Current Assignee: Blue Leaf IP Incorporated (CNH Industrial N.V.), CNH America Llc (CNH Industrial N.V.)
• Original Assignee: Case Corporation (CNH Industrial N.V.)
• Inventors: Lykken, Thomas G.
• Primary Examiner(s): BOEHLER, ANNE MARIE M
• Application Number:
  US08/745,373
• Time in Patent Office: 2,041 Days
• Field of Search: 180/9.1, 180/9.48, 180/9.5, 180/9.52, 180/9.26, 305/116, 305/120, 305/20, 305/121, 305/131, 305/134, 305/153, 305/154, 305/145, 305/143
• US Class Current: 180/9.1
• CPC Class Codes: B62D 55/30 Track-tensioning means

Abstract

This invention includes an undercarriage support and adjustment system for a tracked vehicle having first and second elongated outwardly extending members coupled to the vehicle, a first undercarriage bearing support coupled to the vehicle between the first and second outwardly extending members, and an undercarriage bearing support member slidingly coupled to the outer ends of the two support members and having a second undercarriage bearing support.

Claims

1. An undercarriage support system for a tracked vehicle having a drive wheel with a rotational axis comprising:

first and second elongated outwardly extending members couplable to the vehicle;

a first undercarriage bearing support couplable to the vehicle between said first and second outwardly extending members and configured to support an undercarriage;

an undercarriage bearing support member slidingly couplable to the outer ends of the two support members and having a second undercarriage bearing support configured to support an undercarriage.

2. The support system of claim 1 wherein the first member is configured to extend outwardly in a position forward of the drive wheel'"'"'s axis of rotation and the second member is configured to extend outwardly in a position aft of the drive wheel'"'"'s axis of rotation.

3. The support system of claim 2, wherein the first undercarriage bearing support is couplable to the vehicle below the drive wheel'"'"'s axis and inside of the drive wheel, and the second undercarriage bearing support is couplable to the vehicle below the drive wheel'"'"'s axis of rotation and outside of the drive wheel.

4. The support system of claim 3, wherein the first and second undercarriage bearing supports share a common axis that extends substantially laterally with respect to the vehicle.

5. The support system of claim 4, wherein the undercarriage bearing support member is coupled to the first and second members at first and second coupling points respectively, and wherein the second undercarriage bearing support is disposed between the first and second coupling points.

6. The support system of claim 5, wherein the undercarriage bearing support member has a plurality of elongate adjustment slots at the first and second coupling points.

7. The support system of claim 6, wherein the first elongate member further comprises an adjusting screw and a fore-and-aft extending threaded boss adapted to receive the adjusting screw.

8. The support system of claim 7, wherein the undercarriage bearing support member further comprises an abutting surface adapted to contact the end of the adjusting screw.

9. The support system of claim 1 further comprising an undercarriage having a plurality of wheels coupled to an elongate fore-and-aft wheel mounting beam and a first and second laterally opposed mounting brackets coupled to the wheel mounting beam and adapted to be coupled to the first and second undercarriage bearing supports, respectively.

10. An adjustable suspension system for a tracked vehicle comprising:

a drive wheel extending from the vehicle; and

an undercarriage including a fore-and-aft extending undercarriage beam and a plurality of wheels coupled to the beam; and

a track extending around the periphery of the drive wheel and the plurality of wheels, wherein the undercarriage is adapted to be rotatably coupled to the vehicle and is adapted to be adjustably rotated about a vertical axis, wherein the drive wheel is disposed above and between two of the plurality of wheels.

11. The adjustable suspension system of claim 10, wherein the vertical axis substantially intersects the rotational axis of the drive wheel.

12. A method of aligning a tracked suspension system having at least first and second wheels with first and second rotational axes, respectively, a drive wheel having a drive wheel axis of rotation, and an endless elastomeric track adapted to rotate about the wheels wherein the track is engaged to the drive wheel over a first wrap angle, the method including the step of:

rotating the first wheel and second wheel with respect to the drive wheel about a relative rotational axis that passes through the wrap angle when the relative rotational axis is translated to intersect the drive wheel axis of rotation and wherein the first and second rotational axes are not the same.

13. The method of claim 12 wherein the first wheel and the second wheel are rotated about a relative rotational axis that is within 30 degrees of dividing the wrap angle into two equiangular portions.

14. The method of claim 13 wherein the first wheel and the second wheel are rotated about a relative rotational axis that divides the wrap angle into two substantially equiangular portions.

15. The method of claim 12 wherein the drive wheel if fixed and wherein the first and second wheels are rotated about the relative rotational axis relative to the drive wheel.

16. The method of claim 12 wherein the drive wheel is rotated about the relative rotational axis relative to the first and second wheels.

17. The method of claim 15 wherein the track and the second wheel are rotated about the relative rotational axis relative to the drive wheel.

18. An adjustable suspension system for a tracked vehicle comprising:

a drive wheel extending from the vehicle and having a drive wheel rotational axis;

an undercarriage including a fore-and-aft extending undercarriage beam and a plurality of wheels having a plurality of corresponding rotational axes coupled to the beam; and

a track extending around the periphery of the drive wheel and the plurality of wheels, wherein the undercarriage is adapted to be rotatably coupled to the vehicle and is adapted to be adjustably rotated about a vertical axis, wherein the drive wheel rotational axis is disposed above and between the plurality of corresponding rotational axes.

19. A method of aligning a tracked suspension system having at least first and second wheels with first and second rotational axes, respectively, and an endless elastomeric track adapted to rotate about the wheels wherein the track is engaged to a first one of the wheels over a first wrap angle, the method including the step of:

rotating the first wheel and track with respect to each other about a substantially vertical relative rotational axis that transects the wrap angle when the relative rotational axis is translated to intersect the first rotational axis.