Electromagnetic safety trigger

Patent metadata

Field	Value
Publication number	US-10654686-B2
Application number	US-201615179281-A
Country	US
Kind code	B2
Filing date	Jun 10, 2016
Priority date	Jun 30, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

The present disclosure relates generally to a selectively operable safety brake including a magnetic brake operably coupled to a rod and disposed adjacent to a metal component, the magnetic brake configured to move between an engaging position and a non-engaging position, said magnetic brake, when in the engaging position contemporaneously with motion of the machine, moving the rod in to thereby move the safety brake from the non-braking state into the braking state, and an electromagnetic component including a retention apparatus, the electromagnetic component configured to move the magnetic brake from the engaging position to the non-engaging position upon receipt of a resetting signal.

First claim

What is claimed is:

1. A selectively operable braking device for an elevator system including a car and a plurality of guiderails, comprising:
a safety brake disposed on the car and adapted to be wedged against one of the guiderails when moved from a non-braking state into a braking state;
a rod operably coupled to the safety brake, the rod configured to move the safety brake between the non-braking state and braking state;
a magnetic brake operably coupled to the rod and disposed adjacent to the guiderail, the magnetic brake configured to move between a rail-engaging position and a rail-non-engaging position, said magnetic brake, when in the rail-engaging position contemporaneously with motion of the car, moving the rod in a direction to thereby move the safety brake from the non-braking state into the braking state;
an electromagnetic component, the electromagnetic component configured to move the magnetic brake from the rail-engaging position to the rail-non-engaging position upon receipt of a resetting signal; and
wherein the magnetic brake is configured to de-couple from the electromagnetic component when in the rail-engaging position;
wherein the magnetic brake includes a magnet and the electromagnetic component includes a coil, the magnetic brake is attracted to or repelled from the electromagnetic component in response to a presence or absence of current in the coil, the magnet magnetically coupled to the guiderail in the rail-engaging position;
wherein the rod has a first end connected to the safety brake and a second end connected to the magnetic brake.

2. The braking device of claim 1 further comprising:
a safety controller in electrical communication with the electromagnetic component, the safety controller configured to send a trigger signal and the resetting signal.

3. The braking device of claim 2 , wherein the electromagnetic component is configured to move the magnetic brake to the rail-engaging position upon receipt of the trigger signal.

4. The braking device of claim 1 , wherein the electromagnetic component is configured to hold the magnetic brake in the rail-non-engaging position.

5. The braking device of claim 4 , wherein the retention apparatus further comprises a spring configured to move the electromagnetic component in a direction parallel to an actuation axis.

6. The braking device of claim 1 , wherein the electromagnetic component further comprises a retention apparatus.

7. The braking device of claim 6 , wherein the retention apparatus comprises a housing wall.

8. The braking device of claim 6 , wherein the retention apparatus is configured to return the magnetic brake to the rail-non-engaging position when the electromagnetic component is engaged with the magnetic brake in response to a current in the coil.

9. A selectively operable magnetic braking system comprising:
a safety brake disposed on a machine and adapted to arrest movement of the machine when moved from a non-braking state into a braking state;
a rod operably coupled to the safety brake, the rod configured to move the safety brake between the non-braking state and braking state;
a magnetic brake disposed adjacent to the machine, the magnetic brake configured to move between an engaging position and a non-engaging position, said magnetic brake, when in the engaging position contemporaneously with motion of the machine, moving to thereby move the safety brake from the non-braking state into the braking state; and
an electromagnetic component configured to move the magnetic brake from the engaging position to the non-engaging position upon receipt of a resetting signal and configured to de-couple from the magnetic brake when in the rail-engaging position;
wherein the magnetic brake includes a magnet and the electromagnetic component includes a coil, the magnetic brake is attracted to or repelled from the electromagnetic component in response to a presence or absence of current in the coil, the magnet magnetically coupled to the guiderail in the rail-engaging position;
wherein the rod has a first end connected to the safety brake and a second end connected to the magnetic brake.

10. The magnetic braking system of claim 9 further comprising:
a safety controller in electrical communication with the electromagnetic component, the safety controller configured to send a trigger signal and the resetting signal.

11. The magnetic braking system of claim 9 , wherein the electromagnetic component is configured to move the magnetic brake to the engaging position upon receipt of a trigger signal.

12. The magnetic braking system of claim 9 , wherein the electromagnetic component is configured to hold the magnetic brake in the non-engaging position.

13. The magnetic braking system of claim 9 , wherein the electromagnetic component further comprises a retention apparatus.

14. The magnetic braking system of claim 13 , wherein the retention apparatus comprises a housing wall.

15. The magnetic braking system of claim 13 , wherein the retention apparatus further comprises a spring configured to move the electromagnetic component in a direction parallel to an actuation axis.

16. The magnetic braking system of claim 13 , wherein the retention apparatus is configured to return the magnetic brake to the non-engaging position when the electromagnetic component is engaged with the magnetic brake in response to a current in the coil.

Assignees

• Otis Elevator Co

Inventors

• Hu Guohong
• Marvin Daryl J

Classifications

• B66B5/22

  by means of linearly-movable wedges (B66B5/24 takes precedence) · CPC title

• B66B5/16 Primary

  Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well · CPC title

• B66B5/18 Primary

  and applying frictional retarding forces · CPC title

• F16D65/16

  arranged in or on the brake · CPC title

• B66D5/24

  Operating devices · CPC title