Brake static plate assembly, brake and elevator system

Patent metadata

Field	Value
Publication number	US-12570498-B2
Application number	US-202217825712-A
Country	US
Kind code	B2
Filing date	May 26, 2022
Priority date	Jul 9, 2021
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

A brake static plate assembly, a brake and an elevator system. The brake static plate assembly includes a first static plate and a second static plate. The first static plate includes a first outer edge and a second outer edge which are adjacent to each other; a first inner edge provided with a first shaft mounting notch thereon; a first set of coils disposed on a braking surface of the first static plate. The second static plate includes: a third outer edge and a fourth outer edge which are adjacent to each other; the second inner edge which is matched with the first inner edge and is provided with a second shaft mounting notch which forms a shaft mounting hole of the drive shaft together with the first shaft mounting notch; the second set of coils are disposed on the braking surface of the second static plate.

First claim

What is claimed is:

1 . A brake static plate assembly, characterized in that, comprising:
a first static plate, which has: a first outer edge and a second outer edge which are adjacent to each other; a first inner edge provided with a first shaft mounting notch thereon; and a first set of coils disposed on a braking surface of the first static plate; a second static plate, which has: a third outer edge and a fourth outer edge which are adjacent to each other; a second inner edge which is matched with the first inner edge and is provided with a second shaft mounting notch which forms a shaft mounting hole of a drive shaft together with the first shaft mounting notch; and a second set of coils disposed on the braking surface of the second static plate, and a magnetic flux of the second set of coils is the same as that of the first set of coils; wherein the first inner edge forms an acute angle with the first outer edge and/or the second outer edge, and the second inner edge forms an acute angle with the third outer edge and/or the fourth outer edge.

2 . The brake static plate assembly according to claim 1 , characterized in that, the first outer edge and the second outer edge are perpendicular to each other, the first inner edge forms an angle of 45° with the first outer edge and the second outer edge respectively; the third outer edge and the fourth outer edge are perpendicular to each other, and the second inner edge forms an angle of 45° with the third outer edge and the fourth outer edge respectively.

3 . The brake static plate assembly according to claim 2 , characterized in that, an area of the braking surfaces of the first static plate and the second static plate is greater than the area of the largest circle formed in a boundary defined by the first outer edge, the second outer edge, the third outer edge and the fourth outer edge.

4 . The brake static plate assembly according to claim 2 , characterized in that, the first static plate is disposed symmetrically to the second static plate.

5 . The brake static plate assembly according to claim 2 , characterized in that, further comprising a first mounting edge and a second mounting edge, the first mounting edge is connected between the first inner edge and the first outer edge and/or second outer edge, the second mounting edge is connected between the second inner edge and the third outer edge and/or fourth outer edge; wherein a brake switch used for controlling on-off of the power supply of the first set of coils and/or the second set of coils is disposed in a plane where the first static plate and the second static plate are located along the first mounting edge and the second mounting edge.

6 . The brake static plate assembly according to claim 1 , characterized in that:
a reset part is further disposed on the braking surface of the first static plate and/or the braking surface of the second static plate and used for providing reset force for brake operation or release operation of a braking part of the brake; the first set of coils of the first static plate and the second set of coils of the second static plate provide electromagnetic force for release operation or brake operation of a braking part of the brake; wherein the electromagnetic force and the reset force have opposite force application directions.

7 . The brake static plate assembly according to claim 6 , characterized in that, the reset part is provided close to the edge of the first static plate and/or the edge of the second static plate.

8 . The brake static plate assembly according to claim 7 , characterized in that, the reset part are arranged at an included angle between the first outer edge and the second outer edge and/or the reset part are arranged at the included angle between the first inner edge and the first outer edge and the included angle between the first inner edge and second outer edge.

9 . The brake static plate assembly according to claim 1 , characterized in that, a guide part is further provided on the braking surface of the first static plate and/or the braking surface of the second static plate, and the guide part used for the brake operation of guiding the braking part of the brake to move away from the brake static plate assembly and/or the release operation of guiding the braking part of the brake to move towards the brake static plate assembly.

10 . The brake static plate assembly according to claim 9 , characterized in that, the guide part is disposed close to the edge of the first static plate and/or the edge of the second static plate.

11 . The brake static plate assembly according to claim 10 , characterized in that, the guide part is arranged at an included angle between the first outer edge and the second outer edge and/or the reset part is arranged at the included angle between the first inner edge and the first outer edge and the included angle between the first inner edge and the second outer edge.

12 . A brake static plate assembly according to claim 1 , characterized in that:
a guide post and a reset spring surrounding the guide post are further disposed on the braking surface of the first static plate and/or the braking surface of the second static plate; wherein the reset force provided by the reset spring is used for the brake operation of guiding the braking part of the brake to move along the guide post and away from the brake static plate assembly and/or the release operation of guiding the braking part of the brake to move towards the brake static plate assembly; and the electromagnetic force provided by the first set of coils of the first static plate and the second set of coils of the second static plate is used for the brake operation of guiding the braking part of the brake to move along the guide post and away from the brake static plate assembly and/or the release operation of guiding the braking part of the brake to move towards the brake static plate assembly; wherein the electromagnetic force and the reset force have opposite force application directions.

13 . A brake static plate assembly according to claim 1 , characterized in that:
the first set of coils is configured as one arc-shaped coil or racetrack-shaped coil, or as a plurality of arc-shaped coils, racetrack-shaped coils, or circular coils; or the second set of coils is configured as one arc-shaped coil or racetrack-shaped coil, or as a plurality of arc-shaped coils, racetrack-shaped coils, or circular coils.

14 . A brake, characterized in that, comprising:
the brake static plate assembly according to claim 1 ; and a braking part, which is driven to move towards the brake static plate assembly to perform the release operation or move away from the brake static plate assembly to perform the brake operation.

15 . The brake according to claim 14 , characterized in that, further comprising a transmission part, which comprises a brake lining disc fixedly connected to the drive shaft.

16 . The brake according to claim 14 , characterized in that, when the brake static plate assembly includes a guide post, the braking part further includes a guide bushing disposed through its main body for fitting with the guide post of the brake static plate assembly.

17 . An elevator system, characterized in that, comprising:
the brake according to claim 14 ; and a motor assembly, which has a transmission part associated to a drive shaft; wherein a braking part of the brake is driven to move towards the brake static plate assembly to perform a release operation or move towards the transmission part to perform a brake

Assignees

• Otis Elevator Co

Inventors

• Zhu Fengkun
• Luo Linlin
• Wang Xuewei

Classifications

• B66B5/18 Primary

  and applying frictional retarding forces · CPC title

• B66D5/30

  electrical · CPC title

• B66D5/12

  with axial effect (B66D5/22 takes precedence) · CPC title

• F16D2121/20

  using electromagnets · CPC title

• F16D65/14

  Actuating mechanisms for brakes; Means for initiating operation at a predetermined position (brake control systems, parts thereof B60T) · CPC title