Omni-wheel brake devices and methods for braking an omni-wheel

Patent metadata

Field	Value
Publication number	US-10933689-B2
Application number	US-201916682434-A
Country	US
Kind code	B2
Filing date	Nov 13, 2019
Priority date	Jun 12, 2019
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

An omni-wheel including a hub, a plurality of rollers, and a braking system. The plurality of rollers are circumferentially arranged about the hub and arranged radially outward from the hub, where each roller of the plurality of rollers is secured to the hub by a roller mount. The braking system includes a first braking lever, having a first braking surface, pivotally secured to the roller mount, a second braking lever, having a second braking surface, pivotally secured to the roller mount, opposite the first braking lever, and an actuator arranged to rotate the first braking lever in a first rotational direction and the second braking lever in a second rotational direction. The first braking surface and the second braking surface contact at least one roller of the plurality of rollers when the first braking lever and the second braking lever are rotated by the actuator.

First claim

What is claimed is:

1. An omni-wheel, comprising:
a hub;
a plurality of rollers circumferentially arranged about the hub and arranged radially outward from the hub, wherein each roller of the plurality of rollers is secured to the hub by a roller mount; and
a braking system, comprising:
a first braking lever, having a first braking surface, pivotally secured to the roller mount;
a second braking lever, having a second braking surface, pivotally secured to the roller mount, opposite the first braking lever; and
an actuator arranged to rotate the first braking lever in a first rotational direction and the second braking lever in a second rotational direction;
wherein the first braking surface and the second braking surface contact at least one roller of the plurality of rollers when the first braking lever and the second braking lever are rotated by the actuator.

2. The omni-wheel of claim 1 , further comprising a first braking wheel and a second braking wheel, wherein the first braking wheel and the second braking wheel are axially displaced by the actuator in order to rotate the first and second braking levers.

3. The omni-wheel of claim 2 , wherein the first braking wheel and the second braking wheel are arranged on supports secured to the hub.

4. The omni-wheel of claim 3 , wherein each roller of the plurality of rollers of the omni-wheel comprises a first braking lever and a second braking lever.

5. The omni-wheel of claim 4 , wherein the first braking wheel and the second braking wheel are operatively arranged to engage the first braking lever and the second braking lever of a corresponding roller contacting the ground.

6. The omni-wheel of claim 5 , wherein the first braking lever and the second braking lever only prevent rotation of the roller contacting the ground.

7. The omni-wheel of claim 1 , wherein the first braking lever and the second braking lever are biased to be disengaged with the roller when not rotated by the actuator.

8. The omni-wheel of claim 1 , wherein the roller mounts are rotatably secured to the hub.

9. An omni-wheel, comprising:
a hub;
a plurality of rollers circumferentially arranged about the hub and arranged radially outward from the hub, wherein each roller of the plurality of rollers is secured to the hub by a plurality of roller mounts; and
a braking system, comprising:
a plurality of braking devices arranged about the shaft, each braking device comprising:
a first braking lever, having a first braking surface, pivotally secured to a roller mount of the plurality of roller mounts; and
a second braking lever, having a second braking surface, pivotally secured to the roller mount of the plurality of roller mounts, adjacent the first braking lever;
wherein the first braking surface and the second braking surface contact a roller of the plurality of rollers; and

an actuator arranged to rotate the first braking lever in a first rotational direction and the second braking lever in a second rotational direction.

10. The omni-wheel of claim 9 , further comprising a first braking wheel and a second braking wheel, wherein the first braking wheel and the second braking wheel are axially displaced by the actuator in order to rotate the first and second braking levers.

11. The omni-wheel of claim 10 , wherein the first braking wheel and the second braking wheel are arranged on supports secured to the hub.

12. The omni-wheel of claim 11 , wherein the first braking wheel and the second braking wheel are axially displaced by the actuator.

13. The omni-wheel of claim 12 , wherein the first braking wheel and the second braking wheel are operatively arranged to engage the first braking lever and the second braking lever of a braking device having a corresponding roller contacting the ground.

14. The omni-wheel of claim 13 , wherein the first braking lever and the second braking lever only prevent rotation of the roller contacting the ground.

15. The omni-wheel of claim 9 , wherein the first braking lever and the second braking lever are biased to be disengaged with the roller when not rotated by the actuator.

16. The omni-wheel of claim 9 , wherein the plurality of roller mounts are rotatably secured to the hub.

17. A method of braking an omni-wheel, the method comprising:
rotating a first braking lever in a first rotational direction with an actuator;
rotating a second braking lever in a second rotational direction, opposite the first rotational direction with the actuator; and
contacting a roller of the omni-wheel with the first braking lever and the second braking lever, wherein contacting the roller prevents rotation of the roller.

18. The method of claim 17 , further comprising:
displacing a first braking wheel axially along a first track in a first axial direction with the actuator to contact the first braking lever; and
displacing a second braking wheel axially along a second track in a second axial direction with the actuator to contact the second braking lever,
wherein the axial displacement of the first braking wheel and the second braking wheel rotates the first and second braking levers.

19. The method of claim 18 , wherein the first braking lever and second braking lever contact the roller only when the roller is contacting the ground.

20. The method of claim 19 , wherein the first braking wheel disengages the first braking lever and the second braking wheel disengages the second braking lever when the roller is no longer contacting the ground.

Assignees

• Toyota Motor North America Inc

Inventors

• Moore Douglas A

Classifications

• F16D51/00

  Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like (similar clutches F16D13/14) · CPC title

• F16D49/04

  mechanically actuated · CPC title

• B60B27/0047

  characterised by functional integration of other elements · CPC title

• B60B27/0057

  the element being a brake drum · CPC title

• B60B27/0052

  the element being a brake disc · CPC title