Brake assembly for an electric motor

Patent metadata

Field	Value
Publication number	US-11988258-B2
Application number	US-201917055726-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	May 14, 2018
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

A brake assembly for an electric motor includes: a brake pad plate, a driver, and a shaft. The driver includes an inner driver part and an outer driver part, which are connected to one another by an intermediate layer, the brake pad plate having an inner tooth system, which meshes with an outer tooth system of the outer driver part so that the brake pad plate is connected to the driver in a torsionally fixed but axially displaceable manner, the inner driver part being connected to the shaft in a torsionally fixed manner.

First claim

The invention claimed is:

1. A brake assembly for an electric motor, comprising:
a brake pad plate;
a driver; and
a shaft;
wherein the driver includes an inner driver part and an outer driver part connected to one another by an intermediate layer, the brake pad plate including an inner tooth system that meshes with an outer tooth system of the outer driver part to connect the brake pad plate to the driver in a torsionally fixed but axially displaceable manner, the inner driver part is connected to the shaft in a torsionally fixed manner.

2. The brake assembly according to claim 1 , wherein the driver is arranged as a metal-plastic composite part.

3. The brake assembly according to claim 1 , wherein the brake pad plate is connected to the outer driver part and/or the shaft.

4. The brake assembly according to claim 1 , wherein the inner driver part is connected to the shaft by a feather key connection and/or without play.

5. The brake assembly according to claim 1 , wherein each of the inner driver part, the outer driver part, the intermediate layer, and/or the driver is arranged as a ring parts.

6. The brake assembly according to claim 1 , wherein the outer driver part includes a tooth system and/or an outer tooth system on a radially outer surface that meshes with the inner tooth system of the brake pad plate.

7. The brake assembly according to claim 1 , wherein the intermediate layer is arranged radially between the inner driver part and the outer driver part, the inner driver part and the outer driver part are spaced apart from one another, each of the inner driver part and the outer driver parts has an annular configuration, and/or the inner driver part is arranged radially within the outer driver part.

8. The brake assembly according to claim 1 , wherein the inner driver part includes web regions that project radially outward and/or that project into the intermediate layer, and/or the outer driver part includes web regions that project radially inward and/or that project into the intermediate layer.

9. The brake assembly according to claim 1 , wherein the intermediate layer is formed of a plastic material, a sealing compound, an adhesive, a polymer, and/or an elastomer, the inner driver part and the outer driver part are formed of metal and/or steel, and/or a radial clearance range covered by the outer driver part and/or covered by web regions of the outer driver part overlaps with a radial clearance range covered by the inner driver part and/or overlaps with a radial clearance range covered by web regions of the inner driver part.

10. The brake assembly according to claim 1 , wherein a first bushing is accommodated in and/or pressed into a second bushing, a spring part supported on a housing part presses the first bushing and/or the second bushing toward a magnetic body, a radial clearance range covered by an armature disk includes and/or encompasses a radial clearance range covered by the second bushing, and an axial region covered by the armature disk includes, encompasses, and/or overlaps an axial region covered by the second bushing.

11. The brake assembly according to claim 1 , further comprising:
a magnetic body;
a winding;
at least one bolt;
a housing part having a brake surface;
an armature disk;
at least one spring part; and
at least one first bushing;
wherein the housing part is connected to the magnetic body by the bolt and/or with a positive fit in at least a circumferential direction, the first bushing is accommodated in and/or pressed into a second bushing, the spring part supported on the housing part pushes the first bushing and/or the second bushing toward the magnetic body, a radial clearance range covered by the armature disk includes and/or encompasses a radial clearance range covered by the second bushing, and an axial region covered by the armature disk includes, encompasses, and/or overlaps an axial region covered by the second bushing.

12. The brake assembly according to claim 11 , wherein the spring part includes a counterspring.

13. The brake assembly according to claim 11 , wherein the first bushing is formed of a softer and/or a more elastic material than the second bushing, the first bushing is formed of rubber, a rubberized material, a plastic material, and/or a polymer, the second bushing is made of metal and/or steel, the first bushing is pressed into the second bushing, and/or the first bushing includes an O-ring.

14. The brake assembly according to claim 11 , wherein the first bushing is slidingly mounted on the bolt and/or mounted on the bolt with an accurate fit, and/or the armature disk is connected with play in the circumferential direction to the second bushing and/or the bolt with a positive fit.

15. The brake assembly according to claim 11 , wherein the bolt is connected to the housing part by screws and is guided through a recess that extends axially through the magnetic body, a nut is screwed onto a threaded region provided on a side of the magnetic body facing away from the housing part, the bolt has a step via which the bolt rests against a step of a stepped bore in the housing part, the bolt is connected to the magnetic body by screws and guided through a recess that extends axially through the housing part, a nut is screwed onto a threaded region situated on the side of the housing part facing away from the magnetic body, and/or the bolt has a step via which the bolt rests against a step of a stepped bore in the magnetic body.

16. The brake assembly according to claim 11 , wherein the winding is accommodated in a recess of the magnetic body, the armature disk is connected to the magnetic body and/or to the bolt with play in an axially movable and torsionally fixed manner, and/or a brake pad plate, which is axially displaceable on the shaft and connected to the shaft in a torsionally fixed manner, is arranged between the housing part and the armature disk.

17. The brake assembly according to claim 11 , wherein a spring supported on the magnetic body pushes the armature disk away from the magnetic body and/or in an axial direction toward the brake pad plate, the winding adapted to pull the armature disk toward the magnetic body when energized to overcoming a spring force generated by the spring, the spring part adapted to push the armature disk onto the brake pad plate when the winding is not energized.

18. The brake assembly according to claim 11 , wherein the housing part is tightly and reversibly connected to a flange part that accommodates a bearing adapted to mount the shaft, and/or a sealing tape covers and/or seals a space region accommodating the armature disk and the brake pad plate from the environment.

19. The brake assembly according to claim 11 , wherein the axial region covered by the second bushing is smaller than the axial region covered by the first bushing, the spring part is adapted to push the first bushing toward the magnetic body, the axial region covered by the second bushing is equal to or greater than the axial region covered by the first bushing, and/or the spring part is adapted to push the second bushing toward the magnetic body.

20. The brake assembly according to claim 1 , further comprising:
a magnetic body;
a winding;
a housing part having a brake surface; and
an armature disk;
wherein the brake pad plate and the armature disk are arranged axially between the housing part and the magnetic body, a sealing tape is connected to the housing part in a first axial region and to the magnetic body in a second axial region, the sealing t

Assignees

• Sew Eurodrive Gmbh & Co Kg

Inventors

• Fichtner-Pflaum Gerolf
• Rieger Florian

Classifications

• F16D59/02 Primary

  spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means · CPC title

• H02K7/1025

  using axial electromagnets with generally annular air gap · CPC title

• F16D65/186

  with full-face force-applying member, e.g. annular · CPC title

• F16D2121/22

  for releasing a normally applied brake · CPC title

• H02K5/1735

  radially supporting the rotary shaft at only one end of the rotor (H02K5/1737 takes precedence) · CPC title