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

Patent metadata

Field	Value
Publication number	US-11524523-B2
Application number	US-201916667389-A
Country	US
Kind code	B2
Filing date	Oct 29, 2019
Priority date	Jun 12, 2019
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

An omni-wheel may include a shaft, a plurality of rollers, and a braking device. The plurality of rollers may be circumferentially arranged about the shaft and arranged radially outward from the shaft. The braking device may include an at least one flexible clutch member, an at least one brake pad, and an actuator. The at least one flexible clutch member may have an outer diameter arranged about the shaft. The at least one brake pad may be arranged on the outer diameter of the at least one flexible clutch member. The actuator may be arranged to axially displace the at least one flexible clutch member. The at least one flexible clutch member may expand radially outward when axially displaced by the actuator, which may displace the at least one brake pad arranged on the outer diameter of the at least one flexible clutch member radially outward to contact at least one of the plurality of rollers, preventing rotation of the roller.

First claim

What is claimed is:

1. An omni-wheel, comprising:
a shaft;
a plurality of rollers circumferentially arranged about the shaft and arranged radially outward from the shaft;
a braking device, comprising:
an at least one flexible clutch member arranged about the shaft, the at least one flexible clutch member having an outer diameter;
an at least one brake pad arranged on the outer diameter of the at least one flexible clutch member; and
an actuator arranged to axially displace the at least one flexible clutch member;
wherein the at least one flexible clutch member expands radially outward when axially displaced by the actuator, displacing the at least one brake pad arranged on the outer diameter of the at least one flexible clutch member radially outward to contact at least one of the plurality of rollers, thereby preventing rotation of the roller.

2. The omni-wheel of claim 1 , wherein the at least one brake pad is secured to the at least one flexible clutch member.

3. The omni-wheel of claim 1 , wherein the at least one brake pad is integral with the at least one flexible clutch member.

4. The omni-wheel of claim 1 , wherein the at least one brake pad is biased radially inward to disengage the at least one roller when the at least one flexible clutch member is not axially displaced.

5. The omni-wheel of claim 1 , wherein the actuator further comprises a collar arranged on the shaft of the omni-wheel.

6. The omni-wheel of claim 5 , wherein the at least one flexible clutch member is arranged within a channel formed on the shaft of the omni-wheel.

7. The omni-wheel of claim 1 , wherein the at least one brake pad contacts an axle of the least one of the plurality of rollers.

8. The omni-wheel of claim 1 , wherein the at least one brake pad only prevents rotation of the roller contacting the ground.

9. A braking device for an omni-wheel, comprising:
a flexible clutch member arranged about a shaft of an omni-wheel, wherein the flexible clutch member is radially aligned with a roller of the omni-wheel;
a brake pad arranged on the flexible clutch member; and
an actuator arranged to axially displace the flexible clutch member;
wherein the flexible clutch member expands radially outward when axially displaced by the actuator, displacing the brake pad arranged on the flexible clutch member radially outward to contact the roller, preventing rotation of the roller.

10. The braking device of claim 9 , wherein the brake pad is secured to the flexible clutch member.

11. The braking device of claim 9 , wherein the brake pad is integral with the flexible clutch member.

12. The braking device of claim 9 , wherein the brake pad is biased radially inward to disengage the roller when the flexible clutch member is axially displaced.

13. The braking device of claim 9 , wherein the actuator further comprises a collar arranged on the shaft of the omni-wheel.

14. The braking device of claim 13 , wherein the flexible clutch member is arranged within a channel formed within the shaft of the omni-wheel.

15. A method of braking an omni-wheel, the method comprising:
axially displacing a flexible clutch member arranged within a hub of the omni-wheel in a first axial direction; and
expanding the flexible clutch member radially outward to displace a brake pad arranged within the hub radially outward in order to contact an at least one roller of the omni-wheel with the brake pad, thereby preventing rotation of the roller.

16. The method of claim 15 , wherein the at least one roller of the omni-wheel is prevented from rotating only when contacting the ground.

17. The method of claim 15 , wherein the brake pad is integral with an outer diameter of the flexible clutch member.

18. The method of claim 15 , wherein the flexible clutch member is arranged within a channel formed within a shaft of the omni-wheel.

19. The method of claim 15 , further comprising:
axially displacing a flexible clutch member arranged within a hub of the omni-wheel in a second axial direction; and
retracting the flexible clutch member radially inward to displace the brake pad arranged within the hub radially inward, in order to disengage the brake pad with the at least one roller of the omni-wheel.

20. The method of claim 15 , wherein the brake pad is biased radially inward to disengage the at least one roller when flexible clutch member is axially displaced in the second axial direction.

Assignees

• Toyota Motor North America Inc

Inventors

• Moore Douglas A

Classifications

• B60B27/0052

  the element being a brake disc · CPC title

• B60B19/003 Primary

  Multidirectional wheels · CPC title

• F16D49/14

  shaped as a fluid-filled flexible member actuated by variation of the fluid pressure · CPC title

• F16D65/16

  arranged in or on the brake · CPC title

• F16D2121/08

  acting on a membrane-type actuator, e.g. for gas pressure · CPC title