Motor with a motor brake

• US 10,644,566 B2
• Filed: 06/29/2017
• Issued: 05/05/2020
• Est. Priority Date: 07/08/2016
• Status: Active Grant

• Current Assignee: Akebono Brake Industry Company Limited (Akebono Brake Corporation)
• Original Assignee: Akebono Brake Industry Company Limited (Akebono Brake Corporation)
• Inventors: Al-Mahshi, Waleed, Boyle, Brian
• Primary Examiner(s): Phillips, Forrest M
• Application Number:
  US15/637,109
• Publication Number:
  US 20180013332A1
• Time in Patent Office: 1,041 Days
• Field of Search: 310 77, 188185
• CPC Class Codes: F16D 2121/18 Electric or magnetic
• CPC Class Codes: F16D 2125/36 Helical cams, Ball-rotating ramps
• CPC Class Codes: F16D 2127/06 Locking mechanisms, e.g. acting on actuators, on release mechanisms or on force transmission mechanisms
• CPC Class Codes: F16D 2129/08 Electromagnets
• CPC Class Codes: F16D 65/0068 Brake calipers
• CPC Class Codes: F16D 65/02 Braking members; Mounting thereof friction linings or attachment thereof F16D69/00
• CPC Class Codes: F16D 65/18 adapted for drawing members together , e.g. for disc brakes
• CPC Class Codes: F16D 65/22 adapted for pressing members apart , e.g. for drum brakes
• CPC Class Codes: H02K 7/1023 using electromagnets
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

A brake assembly comprising: (a) a caliper including: (i) one or more pistons, (b) one or more rotary to linear actuators that provides an axial force to move the one or more pistons, (c) a motor gear unit in communication with the one or more rotary to linear actuators, the motor gear unit including: (i) a motor, and (ii) a motor brake that prevents movement of the motor gear unit, the pistons, or both when the motor is turned off so that the brake apply is maintained, the motor brake including: (1) a rotor that is in communication with the motor, (2) a contact pad that is movable into contact with the rotor to prevent movement of the rotor and the motor, and (3) an electromagnet that is in communication with the contact pad and creates a brake retract.

Claims

1. A motor brake assembly comprising:

A caliper including;

One or more pistons,

One or more rotary to linear actuators that provides an axial force to move the one or more pistons,

A motor gear unit in communication with the one or more rotary to linear actuators,

The motor gear unit including;

A motor and a motor brake that prevents movement of the motor gear unit, the one or more pistons, or both when the motor is turned off so that a brake application is maintained, the motor brake including;

a rotor that is in communication with the motor,

a ring-shaped contact pad that is positioned within the rotor, the contact pad is configured to flex and radially expand outward into contact with the rotor to prevent movement of the rotor and the motor, and an electromagnet that is in communication with the contact pas and creates a brake retraction.

2. The motor brake assembly of claim 1, wherein the electromagnet when activated flexes the contact pad out of contact with the rotor.

3. The motor brake assembly of claim 1, wherein the motor comprises an abutment recess, and the contact pad is connected to the motor via an abutment pin that engages the contact pad and the abutment recess.

4. The motor brake assembly of claim 1, wherein the contact pad is ring-shaped.

5. The motor brake assembly of claim 1, wherein the electromagnet when activated radially compresses the contact pad out of contact with the rotor.

6. The motor brake assembly of claim 1, wherein the electromagnet comprises a pair of concentrators and electrical coils disposed in a gap defined between the pair of concentrators.

7. The motor brake assembly of claim 6, wherein the pair of concentrators are connected to the contact pad.

8. The motor brake assembly of claim 7, wherein the contact pad comprises a pair of pad apertures that are each configured to receive a leg of one of the pair of concentrators.

9. The brake assembly of claim 1, wherein the motor brake comprises a friction pad disposed between the contact pad and the rotor.

10. The motor brake assembly of claim 9, wherein the friction pad is ring shaped.

11. The motor brake assembly of claim 9, wherein the friction pad comprises a plurality of discrete friction elements.

12. A motor comprising:

A motor shaft, and

A motor brake that is in communication with the motor shaft and prevents movement of the motor shaft when the motor is turned off so that movement of the motor shaft is prevented, the motor brake including;

A rotor that is in communication with the motor,

A ring-shaped contact pad that is configured to flex and expand radially outward into contact with the rotor to prevent movement of the rotor and the motor, and an electromagnet that is in communication with the contact pad and creates a brake retraction.

13. The motor of claim 12, wherein the contact pad directly contacts the rotor, and the rotor includes a friction pad and the contact pad contacts the friction pad.

14. The motor of claim 12, wherein the contact pad includes one or more grounding portions that are in communication with the motor or a carrier so that the contact pad is movable relative to the motor or the carrier but is connected to the motor or the carrier, and the one or more grounding portions are connected to the motor or the carrier by one or more abutment pins.

15. The motor of claim 12, wherein the contact pad is positioned inside of the rotor.

16. The motor of claim 15, wherein the electromagnet is positioning inside of the rotor.

17. The motor of claim 12, wherein the electromagnet when activated radially compresses the contact pad out of contact with the rotor.

18. The motor of claim 12, wherein the motor brake comprises a friction pad disposed between the contact pad and the rotor.

19. The motor of claim 18, wherein the friction pad is ring shaped.

20. The motor of claim 18, wherein the friction pad comprises a plurality of discrete friction elements.