Safety brake for an elevator

Patent metadata

Field	Value
Publication number	US-11840425-B2
Application number	US-202017757149-A
Country	US
Kind code	B2
Filing date	Dec 11, 2020
Priority date	Dec 17, 2019
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

A safety brake includes a first brake element, a first guide element, and an actuating element. The first brake element is mounted in a displaceable manner in a linear bearing on the first guide element. The first guide element can be moved between a rest position and a braking initial position. The actuating element is designed to move the first guide element from the rest position into the braking initial position, more particularly to activate the safety brake. The first brake element can carry out a braking movement from the braking initial position into a braking position. The braking movement returns the first guide element to the rest position. The first guide element is guided on a first parallelogram guide.

First claim

The invention claimed is:

1. A safety brake for an elevator, the safety brake comprising:
a first braking element;
a first guide element;
an actuating element;
wherein the first braking element is displaceably mounted in a linear bearing on the first guide element, the first guide element being movable between a rest position and a braking initial position;
wherein the actuating element moves the first guide element from the rest position into the braking initial position to activate the safety brake, the first braking element then performing a braking movement from the braking initial position into a braking position, and the braking movement returning the first guide element into the rest position; and
wherein the first guide element is guided during the movement between the rest position and the braking initial position on a first parallelogram guide.

2. The safety brake according to claim 1 wherein the first parallelogram guide guides the first guide element on an actuating slide.

3. The safety brake according to claim 2 including a second parallelogram guide that guides a second guide element on the actuating slide.

4. The safety brake according to claim 2 wherein the actuating element displaces the actuating slide relative to a housing that accommodates the first braking element, the first guide element, the actuating element and the first parallelogram guide.

5. The safety brake according to claim 2 wherein the actuating slide is guided on the housing in another linear bearing.

6. The safety brake according to claim 1 wherein the first parallelogram guide guides the first guide element on a housing.

7. The safety brake according to claim 1 wherein the actuating element moves the first guide element by a parallelogram arm connected between the actuating element and the first guide element.

8. The safety brake according to claim 1 including a counter bearing stop formed on a housing for the first guide element.

9. The safety brake according to claim 1 wherein the first parallelogram guide has an operable parallelogram arm connected to the first guide element and the operable parallelogram arm is operated by the actuating element to move the first guide element.

10. The safety brake according to claim 1 wherein the actuating element is activated by an electrical trigger signal or electronic trigger signal.

11. The safety brake according to claim 10 wherein the actuating element includes an energy storage means, a holding element and an electromagnet, the electromagnet holding the holding element against a force generated by the energy storage means when the electromagnet is energized, and the electromagnet releasing the energy storage means in response to the trigger signal by switching off a current flow to the electromagnet.

12. The safety brake according to claim 11 wherein the energy storage means is a spring.

13. The safety brake according to claim 1 wherein the first parallelogram guide has a parallelogram arm connected to the first guide element, and wherein an acute first angle between an extension direction of the parallelogram arm and a direction perpendicular to a friction surface of the first braking element in the braking initial position is greater than an acute second angle between a direction of the linear bearing on the first guide element and a direction perpendicular to the friction surface of the first braking element in the braking initial position.

14. The safety brake according to claim 13 wherein the first acute angle is at least 10° greater than the second acute angle.

15. An elevator comprising:
a car movable along a travel path between different floors;
a rail attached along the travel path for guiding the car; and
the safety brake according to claim 1 attached to the car for braking the car on the rail.

16. A safety brake for an elevator, the safety brake comprising:
a first braking element and a second braking element;
a first guide element and a second guide element;
an actuating slide;
a first parallelogram guide connecting the first guide element to the actuating slide;
a second parallelogram guide connecting the second guide element to the actuating slide;
an actuating element connected to the actuating slide;
wherein the first and second braking elements are displaceably mounted in linear bearings on the first and second guide elements respectively, the first and second guide elements being movable between a rest position and a braking initial position; and
wherein the actuating element moves the actuating slide and the first and second parallelogram guides to move the first and second guide elements from the rest position into the braking initial position to activate the safety brake, the first and second braking elements then performing a braking movement from the braking initial position into a braking position, and the braking movement returning the first and second guide elements into the rest position.

17. The safety brake according to claim 16 wherein the actuating element is connected to the actuating slide by an actuating mechanism.

Assignees

• Inventio Ag

Inventors

• Geisshüsler Michael
• Osmanbasic Faruk
• Steiner Adrian
• Stähli Julian
• Zapf Volker

Classifications

• B66B5/22 Primary

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