Rear suspension assembly for a vehicle

Patent metadata

Field	Value
Publication number	US-12251979-B2
Application number	US-202217950813-A
Country	US
Kind code	B2
Filing date	Sep 22, 2022
Priority date	Dec 21, 2017
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A utility vehicle includes a rear suspension assembly which has a trailing arm generally extending longitudinally. Also, the rear suspension assembly includes an upper radius rod extending in a generally lateral direction relative to a centerline of the vehicle. Additionally, the rear suspension assembly includes a lower radius rod extending in a generally lateral direction relative to the centerline of the vehicle. The rear suspension assembly further includes a suspension member configured to control toe of the at least one rear ground-engaging member.

First claim

What is claimed is:

1. A utility vehicle, comprising:
a frame assembly extending longitudinally along a centerline of the vehicle;
at least one front ground-engaging member supporting the frame assembly;
at least one rear ground-engaging member supporting the frame assembly and including a knuckle;
a rear axle operably coupled to the rear ground-engaging member; and
a rear suspension assembly operably coupled to the frame assembly and the at least one rear ground-engaging member, the rear suspension assembly comprising:
a trailing arm generally extending longitudinally and operably coupled to the frame assembly and the at least one rear ground-engaging member, wherein the trailing arm defines an envelope when viewed from a side of the utility vehicle; and
a suspension member positioned within the envelope defined by the trailing arm, wherein the suspension member is operable to control toe of the at least one rear ground-engaging member.

2. The utility vehicle of claim 1 , wherein the envelope of the trailing arm is defined as extending longitudinally between forward portions of the trailing arm and rearward portions of the trailing arm.

3. The utility vehicle of claim 1 , wherein the envelope of the training arm is defined as extending vertically between trailing arm frame members.

4. The utility vehicle of claim 1 , wherein the suspension member is concealed by the envelope such that no portion of the suspension member extends above an upper surface of the trailing arm or a lower surface of the trailing arm when viewed from a side of the utility vehicle.

5. The utility vehicle of claim 1 , wherein the suspension member is concealed by the envelope such that no portion of the suspension member extends forward of a forward extent of the trailing arm or rearward of a rearward extent of the trailing arm when viewed from a side of the utility vehicle.

6. The utility vehicle of claim 1 , wherein the rear suspension assembly further includes a first radius rod and a second radius rod, wherein the envelope is further defined by the first and second radius rods when viewed from a rear of the vehicle.

7. The utility vehicle of claim 6 , wherein the envelope is defined as extending laterally between coupling members of the first radius rod, vertically between the first and second radius rods, and laterally between coupling members of the second radius rod.

8. The utility vehicle of claim 7 , wherein the suspension member does not extend above the first radius rod, below the second radius rod, or laterally beyond the coupling members of the first and second radius rods when viewed from the rear of the vehicle.

9. The utility vehicle of claim 8 , wherein a first coupling member of the suspension member is positioned at least partially above a wheel center extending through the at least one rear ground engaging member.

10. A utility vehicle comprising:
a frame assembly extending longitudinally along a centerline of the vehicle;
at least one front ground-engaging member supporting the frame assembly;
at least one rear ground-engaging member supporting the frame assembly and including a knuckle;
a powertrain assembly including an engine, the powertrain supported by the frame and operable to provide power to at least one of the at least one front ground-engaging member and the at least one rear ground-engaging member;
a rear axle operably coupled to the rear ground-engaging member; and
a rear suspension assembly operably coupled to the frame assembly and the at least one rear ground-engaging member, the rear suspension assembly comprising:
a trailing arm generally extending longitudinally and operably coupled to the frame assembly and the at least one rear ground-engaging member; and
a suspension member coupled to the trailing arm and the frame, wherein the suspension member is positioned forward of the powertrain, wherein the suspension member is positioned laterally inward of the trailing arm, and wherein the suspension member is operable to control toe of the at least one rear ground-engaging member,
wherein the rear suspension assembly further includes a torsion bar coupled to the at least one rear ground-engaging member, wherein at least a portion of the torsion bar is positioned forward of the engine.

11. The utility vehicle of claim 10 , wherein the suspension member is positioned forward of coupling members of the torsion bar.

12. The utility vehicle of claim 10 , wherein the powertrain assembly includes a transmission, wherein the torsion bar is positioned forward of the transmission.

13. The utility vehicle of claim 10 , wherein the transmission is a continuously variable transmission.

14. The utility vehicle of claim 10 , wherein the powertrain assembly includes a transmission, wherein at least a portion of the suspension member is positioned forward of the transmission.

15. The utility vehicle of claim 14 , wherein transmission is a continuously variable transmission.

16. The utility vehicle of claim 10 , wherein the suspension member is positioned forward of the rear axle.

17. The utility vehicle of claim 10 , wherein the trailing arm and the suspension member extend to a position forward of the powertrain assembly.

18. The utility vehicle of claim 17 , wherein the powertrain assembly includes a rear final drive member, a shiftable transmission, and a continuously variable transmission.

19. The utility vehicle of claim 10 , wherein a forward portion of the suspension member extends approximately parallel with a forward portion of the trailing arm.

20. A utility vehicle comprising:
a frame assembly extending longitudinally along a centerline of the vehicle;
at least one front ground-engaging member supporting the frame assembly;
at least one rear ground-engaging member supporting the frame assembly and including a knuckle;
a powertrain assembly including an engine, the powertrain supported by the frame and operable to provide power to at least one of the at least one front ground-engaging member and the at least one rear ground-engaging member;
a rear axle operably coupled to the rear ground-engaging member; and
a rear suspension assembly operably coupled to the frame assembly and the at least one rear ground-engaging member, the rear suspension assembly comprising:
a trailing arm generally extending longitudinally and operably coupled to the frame assembly and the at least one rear ground-engaging member; and

a suspension member coupled to the trailing arm and the frame, wherein the suspension member is positioned forward of the powertrain, and wherein the suspension member is operable to control toe of the at least one rear ground-engaging member,
wherein the trailing arm and the suspension member extend to a position forward of the powertrain assembly, and wherein a longitudinal length of the suspension member extends along a lateral side of the trailing arm.

Assignees

• Polaris Inc

Inventors

• Brady Louis J
• Nutter John M
• Giese Timothy J
• Hansen Donald S

Classifications

• B60G2200/1442

  including longitudinal rods · CPC title

• B60G2206/11

  the arm being a radius or track or torque or steering rod or stabiliser end link · CPC title

• B60G2200/462

  Toe-in/out · CPC title

• B60Y2200/20

  Off-Road Vehicles · CPC title

• B60G2300/07

  Off-road vehicles · CPC title