LEANING SUSPENSION MECHANICS

• US 20070075517A1
• Filed: 09/27/2006
• Published: 04/05/2007
• Est. Priority Date: 09/30/2005
• Status: Active Grant

• Current Assignee: Harley-Davidson Motor Company Incorporated (Harley-Davidson Incorporated), BWI Company Limited SA (Shougang Corporation)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated), Harley-Davidson Motor Company Group Incorporated (Harley-Davidson Incorporated)
• Inventors: Roth, Andrew, Suhre, Ryan, Massignan, Andrew
• Granted Patent: US 7,591,337 B2
• Time in Patent Office: Days
• US Class Current: 280/124.134
• CPC Class Codes: B60G 11/15 Coil springs resisting deflection by winding up
• CPC Class Codes: B60G 21/007 means for adjusting the wheel inclination
• CPC Class Codes: B60G 21/05 between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
• CPC Class Codes: B60G 2200/144 with two lateral arms forming a parallelogram
• CPC Class Codes: B60G 2202/12 Wound spring
• CPC Class Codes: B60G 2202/312 The spring being a wound spring
• CPC Class Codes: B60G 2204/128 Damper mount on vehicle body or chassis
• CPC Class Codes: B60G 2204/129 Damper mount on wheel suspension or knuckle
• CPC Class Codes: B60G 2204/143 on the vehicle body or chassis
• CPC Class Codes: B60G 2204/148 on the unsprung part of the vehicle, e.g. wheel knuckle or rigid axle
• CPC Class Codes: B60G 2204/414 Cardan joints
• CPC Class Codes: B60G 2204/421 Pivoted lever mechanisms for mounting suspension elements, e.g. Watt linkage
• CPC Class Codes: B60G 2204/4302 for fixing suspension arm on the vehicle body or chassis
• CPC Class Codes: B60G 2300/122 Trikes
• CPC Class Codes: B60G 2300/45 Rolling frame vehicles
• CPC Class Codes: B60G 3/20 all arms being rigid
• CPC Class Codes: B60G 7/00 Pivoted suspension arms; Accessories thereof means for maintaining substantially constant wheel camber during suspension movement B60G3/26; articulations for wheels B60G5/00; leaf spring attaching means B60G11/10, B60G11/12; trailing arm twist beam axle attaching means B60G21/052; articulations in general F16C
• CPC Class Codes: B62K 5/027 Motorcycles with three wheels specially adapted for disabled riders B62K5/023
• CPC Class Codes: B62K 5/05 characterised by a single rear wheel
• CPC Class Codes: B62K 5/08 with steering devices acting on two or more wheels
• CPC Class Codes: B62K 5/10 : with means for inwardly inclining the vehicle body on bends

Abstract

A vehicle including a frame, left and right wheels, and a leaning suspension system. The frame defines a longitudinal vehicle axis. The leaning suspension system includes a transverse beam, left and right damping members, left and right control arms, and at least one lean actuator. The transverse beam is coupled to the frame and pivotable about the vehicle axis. The left and right damping members are pivotally coupled to the left and right sides of the transverse beam. The left control arm is pivotally coupled to the left wheel and to the frame, and the right control arm is pivotally coupled to the right wheel and to the frame. The lean actuator is pivotally connected between the frame and the transverse beam. The lean actuator is configured to extend and retract to tilt the left and right wheels and to lean the vehicle while cornering.

Claims

1. A vehicle comprising:

a frame defining a longitudinal vehicle axis;

a left wheel disposed on the left side of the vehicle axis;

a right wheel disposed on the right side of the vehicle axis;

a leaning suspension system including

a transverse beam coupled to the frame and pivotable about the vehicle axis,

a left damping member pivotally coupled to a left side of the transverse beam,

a right damping member pivotally coupled to a right side of the transverse beam,

a left control arm having a first end pivotally coupled to the left wheel and an opposite end coupled to the frame,

a right control arm having a first end pivotally coupled to the right wheel and an opposite end coupled to the frame, and

at least one lean actuator pivotally connected between the frame and the transverse beam, the lean actuator configured to extend and retract to tilt the left and right wheels and to lean the vehicle while cornering.

2. The vehicle of claim 1, wherein ends of the right and left upper control arms are forked, and wherein at least a portion of the transverse beam is disposed between the forked ends of the right and left control arms.

3. The vehicle of claim 2, wherein at least a portion of the transverse beam is located within a substantially horizontal plane defined by one of the left control arm and the right control arm.

4. The vehicle of claim 3, wherein the transverse beam is substantially centered between the forked ends of the right and left control arms.

5. The vehicle of claim 1, wherein the control arms are upper control arms, and wherein the leaning suspension system further includes a left lower control arm having a first end pivotally coupled to the left wheel and an opposite end pivotally coupled to the frame, and a right lower control arm having a first end pivotally coupled to the right wheel and an opposite end pivotally coupled to the frame, wherein the left and right lower control arms are disposed below the left and right upper control arms, respectively.

6. The vehicle of claim 5, wherein the left damping member is pivotally coupled between the left lower control arm and the left side of the transverse beam, and the right damping member pivotally coupled between the right lower control arm and the right side of the transverse beam.

7. The vehicle of claim 6, wherein the left damping member is pivotally coupled to a left end of the transverse beam at a left pivot point, and the right damping member is pivotally coupled to a right end of the transverse beam at a right pivot point.

8. The vehicle of claim 7, wherein the at least one lean actuator includes one end pivotally coupled to the frame and an opposite end pivotally coupled to the transverse beam between the vehicle axis and one of the right or left pivot points.

9. The vehicle of claim 1, wherein the at least one lean actuator includes a left lean actuator pivotally coupled between the frame and a left side of the transverse beam and a right lean actuator pivotally coupled between the frame and a right side of the transverse beam.

10. The vehicle of claim 1, further comprising handlebars pivotally coupled to the frame, a left tie rod coupled between the handlebars and the left wheel, and a right tie rod coupled between the handlebars and the right wheel.

11. The vehicle of claim 1, wherein the transverse beam remains substantially horizontal when the wheels pivot and the vehicle leans.

12. The vehicle of claim 1, further comprising a left spindle coupled between the left and the left wheel, and a right spindle coupled between the right control arm and the right wheel.

13. A vehicle comprising:

a frame defining a longitudinal vehicle axis;

a left wheel disposed on the left side of the vehicle axis;

a right wheel disposed on the right side of the vehicle axis;

a leaning suspension system including

a transverse beam coupled to the frame and pivotable about the vehicle axis.

a left control arm having an end pivotally coupled to the left wheel and an opposite end coupled to the frame,

a right control arm having an end pivotally coupled to the right wheel and an opposite end coupled to the frame, wherein the opposite ends of the right and left upper control arms are forked, and wherein at least a portion of the transverse beam is disposed between the forked ends of the right and left control arms, and

at least one lean actuator pivotally connected between the frame and the transverse beam, the lean actuator configured to extend and retract to tilt the left and right wheels and to lean the vehicle while cornering.

14. The vehicle of claim 13, wherein at least a portion of the transverse beam is located within a substantially horizontal plane defined by one of the left control arm and the right control arm.

15. The vehicle of claim 14, wherein the transverse beam is substantially centered between the forked ends of the right and left control arms.

16. The vehicle of claim 13, wherein the control arms are upper control arms, and wherein the leaning suspension system further includes a left lower control arm having a first end pivotally coupled to the left wheel and an opposite end pivotally coupled to the frame, and a right lower control arm having a first end pivotally coupled to the right wheel and an opposite end pivotally coupled to the frame right and left lower control arms, wherein the left and right lower control arms are disposed below the left and right upper control arms, respectively.

17. The vehicle of claim 16, further comprising a left damping member pivotally coupled between the left lower control arm and the left side of the transverse beam, and a right damping member pivotally coupled between the right lower control arm and the right side of the transverse beam.

18. The vehicle of claim 17, wherein the left damping member is pivotally coupled to a left end of the transverse beam at a left pivot point, and the right damping member is pivotally coupled to a right end of the transverse beam at a right pivot point.

19. The vehicle of claim 18, wherein the at least one lean actuator includes one end pivotally coupled to the frame and an opposite end pivotally coupled to the transverse beam between the vehicle axis and one of the right or left pivot points.

20. The vehicle of claim 13, wherein the at least one lean actuator includes a left lean actuator pivotally coupled between the frame and a left side of the transverse beam and a right lean actuator pivotally coupled between the frame and a right side of the transverse beam.

21. The vehicle of claim 13, further comprising handlebars pivotally coupled to the frame, a left tie rod coupled between the handlebars and the left wheel, and a right tie rod coupled between the handlebars and the right wheel.

22. The vehicle of claim 13, wherein the transverse beam remains substantially horizontal when the wheels pivot and the vehicle leans.

23. The vehicle of claim 13, further comprising a left spindle coupled between the left control arm and the left wheel, and a right spindle coupled between the right control arm and the right wheel.