Kinetic energy wheel brakes

• US 5,088,662 A
• Filed: 12/11/1989
• Issued: 02/18/1992
• Est. Priority Date: 12/11/1989
• Status: Expired due to Fees

• Current Assignee: Rockwell International Corporation
• Original Assignee: Rockwell International Corporation
• Inventors: Appleberry, Walter T.
• Primary Examiner(s): Cherry, Johnny D.
• Assistant Examiner(s): KANNOFSKY, JAMES
• Application Number:
  US07/448,460
• Time in Patent Office: 799 Days
• Field of Search: 244/111, 244/103 R, 244/103 W, 301/6 A, 301/6 R, 301/127, 301/36 R, 301/13 SM, 280/661, 280/93, 280/94, 180/905, 180/906
• US Class Current: 244/111
• CPC Class Codes: B60T 1/065 employing disc B60T1/062 takes precedence
• CPC Class Codes: B64C 25/44 Actuating mechanisms

Abstract

A braking device for a vehicle utilizing a plurality of wheels for motion relative to a surface. The present invention includes a bent axle for supporting at least one of the wheels. The bent axle has a first axle portion being disposed parallel to a y-axis which is perpendicular to an x-axis, the x-axis defining the longitudinal axis of a main structure of the vehicle, the x-axis also defining the direction of vehicle motion. The bent axle includes at least one terminal axle portion angularly disposed from the first axle portion. The first axle portion of the bent axle rotatably engages with the main structure of the vehicle, along an axis parallel to the y-axis. The terminal axle portion of the bent axle rotatably engages with the wheel. Therefore, the wheel rotates in a plane that is not parallel to the direction of vehicle motion.

Claims

1. A braking device for a vehicle having a main structure with a longitudinal axis, x, defining the direction of vehicle motion, a perpendicular axis, y, and a vertical axis, z, the axes x, y, z defining an orthogonal coordinate system, said vehicle utilizing a plurality of wheels for motion thereof relative to a surface, each wheel having an axis of rotation, comprising:

support means for supporting at least one of said wheels, said support means including;

(a) bent axle means, said bent axle means being unitary, one piece and having a first axle portion being disposed parallel to said y-axis and at least one terminal axle portion angularly disposed from said first axle portion,

(b) means for rotatably engaging the first axle portion of said bent axle means, relative to said main structure, about an axis parallel to said y-axis, and

(c) means for rotatably engaging said at least one terminal axle portion of said bent axle means with said at least one wheel,

said wheel thereby rotating in a plane that is not parallel to the direction of vehicle motion.

2. The braking device of claim 1 wherein said means for rotatably engaging said first axle portion includes:

(a) a linear actuator having a first end pivotally mounted to said main structure, and a second end; and

(b) lever means connected to said second end of the linear actuator, said lever means being integral with said bent axle means for translating said linear motion of said linear actuator to rotary axle motion.

3. The braking device of claim 2 wherein said linear actuator is adjustable so as to incrementally adjust the braking force.

4. The braking device of claim 1 wherein said bent axle means includes a single stub axle.

5. The braking device of claim 1 wherein said bent axle means includes a unitary double stub axle, said double stub axle having two symmetrically disposed terminal axle portions.

6. The braking device of claim 1 wherein said support means includes:

a unitary double stub axle, said double stub axle having two symmetrically disposed terminal axle portions for supporting at least two opposing wheels; and

adjustment means for modulating the angular disposition of said terminal axle portions relative to said main structure.

7. The braking device of claim 6 wherein said adjustment means provides "toe-out" disposition of said wheels relative to the direction of vehicle motion.

8. The braking device of claim 6 wherein said adjustment means provides "toe-in" dispositon of said wheels relative to the direction of vehicle rotation.

9. The braking device of claim 1 further including a rotary friction brake assembly including at least one stator, one rotor, and one brake pad disposed therebetween, said stator being fixedly attached to said bent axle means and said rotor being fixedly attached to said wheel.

10. The braking device of claim 9 wherein said rotary friction brake assembly includes a disc brake assembly.

11. The braking device of claim 10 wherein said disc brake assembly includes a single brake pad.

12. The braking device of claim 10 wherein said disc brake assembly includes a plurality of brake pads.

13. A braking device for a vehicle having a main structure with a longitudinal axis, x, defining the direction of vehicle motion, a perpendicular axis, y, and a vertical axis, z, the axes x, y, z defining an orthogonal coordinate system, said vehicle utilizing a plurality of wheels for motion thereof relative to a surface, each wheel having an axis of rotation, comprising:

(a) first braking means for providing a first source of braking, said first braking means including means for adjusting at least one of said wheels to a position sufficiently non-parallel to said x-axis so as to create a substantial braking component of the resulting friction force; and

(b) second braking means connected to said first braking means for providing a second source of braking, said second source being a rotary friction brake assembly energized by said first braking means.

14. The braking device of claim 13 wherein said first braking means includes:

(a) unitary double stub axle having a central portion, and

(b) two symmetrically disposed terminal axle portions angularly disposed from said central portion, said terminal axle portions for supporting at least two wheels.

15. The braking device of claim 14 wherein first braking means further includes:

(a) a linear actuator having a first end pivotally mounted to said main structure, and a second end; and

(b) lever means connected to said second end of the linear actuator, said lever means being integral with said double stub axle for translating the linear motion of said linear actuator to rotary axle motion.

16. The braking device of claim 15 wherein said rotary friction brake assembly includes a disc brake.

17. A braking device for an aircraft utilizing main struts to support landing gear wheels, said aircraft having a longitudinal axis, x, a perpendicular axis, y, and a vertical axis, z, the axes x, y, z, defining an orthogonal coordinate system, said braking device comprising:

(a) a unitary double stub axle supported by a main strut, said double stub axle having a central portion and two symmetrically disposed terminal axle portions angularly disposed from said central portion, said terminal axle portions for supporting said wheels; and

(b) means for rotating said double stub axle so as to adjust the amount of "toe-out" of the wheels.

18. The braking device of claim 17 wherein said means for rotating said double stub axle includes:

(a) a linear actuator having a first end pivotally mounted to said main strut, and a second end; and

(b) lever means connected to said second end of the linear actuator, said lever means being integral with said double stub axle for translating the linear motion of said linear actuator to rotary axle motion.

19. The braking device of claim 18 further including a rotary friction brake assembly connected to each terminal axle portion of said double stub axle.

20. The braking device of claim 19 wherein said rotary friction brake assembly includes a disc brake assembly.