Motor with a cone clutch motor brake

Patent metadata

Field	Value
Publication number	US-11136010-B2
Application number	US-201916269718-A
Country	US
Kind code	B2
Filing date	Feb 7, 2019
Priority date	Feb 20, 2018
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

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 (b) a motor brake that prevents movement of the motor gear unit, the pistons, or both when the motor is turned off so that a brake apply is maintained, the motor brake including: (i) housing; (ii) an engaging element; (iii) a sleeve, and (iv) a solenoid that is in communication with the sleeve so that when the solenoid moves the sleeve, the engaging element is moved into contact with the housing creating a braking force.

First claim

I claim:

1. 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

d. 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 apply is maintained, the motor brake including:
i. a housing
ii. an engaging element, wherein the engaging element includes a conical portion that is generally cone shaped;
iii. a sleeve, and
iv. a solenoid having a shaft extending into the sleeve and connected to the sleeve so that, when the solenoid moves the sleeve by axially moving the shaft connected to the sleeve via a pin extending between the shaft and the sleeve, the engaging element is moved into contact with the housing, thereby creating a braking force.

2. The brake assembly of claim 1 , wherein the sleeve moves in a first direction during a brake apply and the engaging element moves in a second direction during a brake apply and the first direction and the second direction are opposite directions.

3. The brake assembly claim 1 , wherein a plate extends through a window in the sleeve and the plate assists in connecting the sleeve to the solenoid.

4. The brake assembly of claim 3 , wherein the plate includes one or more arms that connect to one or more arms of the solenoid.

5. The brake assembly of claim 3 , wherein a plurality of balls are located between the plate and the engaging element.

6. The brake assembly of claim 5 , wherein the plurality of balls move along the engaging element as the sleeve moves so that the plurality of balls move the engaging element into contact with the housing.

7. The brake assembly of claim 1 , wherein the sleeve includes one or more bias features that move one or more balls toward an axis of the engaging element so that the engaging element is axially moved.

8. The brake assembly of claim 7 , wherein the one or more bias features are an annular ring that tapers and narrows as the bias features extend away from the solenoid.

9. The brake assembly of claim 1 , wherein the engaging element includes one or more engaging portions on an opposite side of the engaging element as the conical portion.

10. The brake assembly of claim 9 , wherein the one or more engaging portions includes a friction surface that contacts the housing to create a braking force to prevent movement of the motor when motor brake is on.

11. The brake assembly of claim 1 , wherein a plurality of balls are in contact with the conical portion and as the plurality of balls move towards a peak of the conical portion the engaging element moves towards the housing and as the plurality of balls move away from the peak of the conical portion the engaging element moves away from the housing.

12. The brake assembly of claim 1 , wherein the conical portion includes one or more tracks.

13. The brake assembly of claim 12 , wherein a ball is located within each of the one or more tracks and the one or more tracks assist in guiding the balls during movement.

14. The brake assembly of claim 1 , wherein the housing includes one or more tapered surfaces.

15. The brake assembly of claim 14 , wherein the one or more tapered surfaces are in contact with a friction surface of the engaging element when the engaging element and the housing are in contact and in a final engaged position, thereby creating the braking force.

16. 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

d. 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 apply is maintained, the motor brake including:
i. a housing;
ii. an engaging element that is movable into contact with the housing, wherein the engaging element includes a conical portion that is generally cone shaped;
iii. a plate
iv. a sleeve that extends between the engaging element and the plate, and a portion of the engaging element extending into the sleeve;
v. a plurality of balls located between the plate and the engaging element; and
vi. a solenoid having a shaft extending into the sleeve and connected to the sleeve by a pin extending through the shaft and the sleeve,
wherein the solenoid moves the sleeve by axially moving the shaft connected to the sleeve, thereby moving the plurality of balls along the engaging element, and the engaging element is moved into contact with the housing to create a braking force.

17. The brake assembly of claim 16 , wherein the sleeve includes one or more bias features that move one or more balls toward an axis of the engaging element so that the engaging element is axially moved.

18. The brake assembly of claim 17 , wherein the one or more bias features are an annular ring that tapers and narrows as the bias features extend away from the solenoid.

Assignees

• Akebono Brake Ind

Inventors

• Suzuki Michio

Classifications

• F16D2121/14

  Mechanical · CPC title

• F16D2125/40

  Screw-and-nut · CPC title

• F16D2121/04

  acting on a piston-type actuator, e.g. for liquid pressure · CPC title

• F16D15/00

  Clutches with wedging balls or rollers or with other wedgeable separate clutching members (freewheels, freewheel clutches F16D41/00) · CPC title

• F16D65/18

  adapted for drawing members together {, e.g. for disc brakes} · CPC title