Electromagnetically actuable brake device

Patent metadata

Field	Value
Publication number	US-11549562-B2
Application number	US-202117146726-A
Country	US
Kind code	B2
Filing date	Jan 12, 2021
Priority date	Dec 16, 2014
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

An electromagnetically actuable brake device includes: a coil shell, in particular of the solenoid, an armature disk, which is connected to the coil shell in a torque-proof yet displaceable manner, a sensor having a sensor housing, a spring part, and a screwed cable gland. The coil shell has a stepped through bore, the sensor housing of the sensor has a stepped configuration, the screwed cable gland is situated at an end of the bore, in particular is screwed into a threaded section of the bore, the spring part is situated in the bore between the screwed cable gland and the sensor housing, the spring part is braced on a step of the sensor housing on one side and on the screwed cable gland on the other, and the sensor housing is pressed against a step of the bore, in particular by the spring part.

First claim

What is claimed is:

1. A sensor system for an electromagnetically actuable brake device, comprising:
a coil shell including a stepped through bore;
a sensor including a stepped sensor housing; and
a spring part arranged in the bore and pressing the sensor housing against a step of the stepped through bore.

2. The sensor system according to claim 1 , wherein one side of the spring part is braced on a step of the sensor housing.

3. The sensor system according to claim 1 , wherein the stepped through bore transitions at the step from a first diameter to a second diameter, the second diameter being smaller than the first diameter.

4. The sensor system according to claim 3 , wherein the sensor housing includes a step, the sensor housing having a first diameter on a first side of the step of the sensor housing and a second diameter on second side, opposite the first side, of the step of the sensor housing.

5. The sensor system according to claim 4 , wherein the first diameter of the sensor housing is smaller than the first diameter of the stepped through bore, and the second diameter of the sensor housing is smaller than the second diameter of the stepped through bore.

6. The sensor system according to claim 1 , wherein a portion of the sensor housing having the first diameter is arranged in a portion of the stepped through bore having the first diameter, and wherein a portion of the sensor housing having the second diameter is arranged in a portion of the stepped through bore having the second diameter.

7. The sensor system according to claim 4 , wherein the spring part presses the step of the sensor housing against the step of the stepped through bore.

8. The sensor system according to claim 1 , wherein the sensor housing includes a first step and a second step, the spring part pressing the first step against the step of the stepped through bore and being braced against the second step of the sensor housing.

9. The sensor system according to claim 1 , further comprising a screwed cable gland arranged at an end of the stepped through bore, the spring part being arranged between the screwed cable gland and the sensor housing.

10. The sensor system according to claim 1 , wherein the sensor is arranged as an eddy-current sensor.

11. The sensor system according to claim 1 , wherein the sensor is adapted to sense a distance between an armature disk of the brake device and the sensor.

12. The sensor system according to claim 9 , wherein the screwed cable gland is screwed into a threaded section of the stepped through bore.

13. The sensor system according to claim 1 , wherein the sensor and the stepped through bore are located at a greater radial distance from an axis of a shaft of the brake device to be braked than a coil of a solenoid of the brake device.

14. The sensor system according to claim 1 , further comprising a cable centrically routed from the sensor through the spring part.

15. The sensor system according to claim 14 , further comprising a screwed cable gland arranged at an end of the stepped through hole, the spring part being arranged between the screwed cable gland and the sensor housing, the cable being arranged centrically through the screwed cable gland.

16. The sensor system according to claim 1 , wherein the sensor is adapted to monitor wear of a brake pad of the brake system by sensing an axial distance between an armature of the brake system and the coil shell.

17. The sensor system according to claim 1 , wherein the spring part is arranged as a helical spring.

18. The sensor system according to claim 1 , wherein the step is arranged at a first end of the stepped through bore.

19. The sensor system according to claim 18 , further comprising a screwed cable gland arranged at a second end of the stepped through bore opposite the first end, the spring part being arranged between the screwed cable gland and the sensor housing.

20. The sensor system according to claim 9 , wherein the screwed cable gland includes a hexagonal shoulder engaging against a surface of the coil shell.

Assignees

• Sew Eurodrive Gmbh & Co Kg

Inventors

• Hufnagel Timo
• Fichtner-Pflaum Gerolf

Classifications

• H02K49/00

  Dynamo-electric clutches; Dynamo-electric brakes · CPC title

• H02K7/1021

  Magnetically influenced friction brakes · CPC title

• H02K11/27

  Devices for sensing current, or actuated thereby (overcurrent protection responsive to temperature of the machines or parts thereof, e.g. windings, H02K11/25) · CPC title

• H02K7/104

  with eddy-current brakes · CPC title

• F16D65/18

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