Brake device, e.g. with an eccentric element, for braking a traveling body that can be moved in a guided manner along a guide rail in a movement direction

Patent metadata

Field	Value
Publication number	US-11897731-B2
Application number	US-202017756914-A
Country	US
Kind code	B2
Filing date	Dec 11, 2020
Priority date	Dec 12, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A brake device for braking an elevator installation traveling body movable along a guide rail includes a holder mounting a brake element having a brake surface movable relative to the holder between a freewheel position and a braking position. In a deactivated configuration, a pretensioning element does not exert any force moving the brake element towards the braking position, and in an activated configuration exerts such force. In a retaining state, a release element retains the pretensioning element in the deactivated configuration, and when activated into a released state, the release element changes the pretensioning element into the activated configuration. In an unactuated state, a friction-generating element does not abut the guide rail and, in an actuated state generates friction by abutting the guide rail to exert a force on the brake element and force the brake element towards the freewheel position.

First claim

The invention claimed is:

1. A brake device for braking a traveling body of an elevator installation, the traveling body being movable in a guided manner along a guide rail in a movement direction, the brake device comprising:
a holder adapted to be attached to the traveling body;
a brake element;
a pretensioning element;
a release element;
a friction-generating element;
wherein the brake element is mounted and retained on the holder and has a brake surface directed toward the guide rail when the holder is attached to the traveling body, the brake element being movable relative to the holder between a freewheel position and a braking position, wherein the brake surface is laterally spaced apart from the guide rail in the freewheel position and is pressed laterally against the guide rail in the braking position;
wherein the pretensioning element, in a deactivated configuration, does not exert a force on the brake element to move the brake element toward the braking position and, in an activated configuration, exerts a force on the brake element that moves the brake element toward the braking position;
wherein the release element, in a retaining state, retains the pretensioning element in the deactivated configuration and, when the release element is in a released state, changes the pretensioning element from the deactivated configuration into the activated configuration; and
wherein the friction-generating element, in an unactuated state, cannot generate any friction by abutting the guide rail and therefore does not exert any force resulting from such friction on the brake element and, in an actuated state, the friction-generating element generates friction by abutting the guide rail to exert a force resulting from the generated friction on the brake element, which force forces the brake element in a direction towards the freewheel position.

2. The Brake device according to claim 1 wherein the brake element is an eccentric element having a sub-region of a lateral surface of the eccentric element that acts as the brake surface, the eccentric element being pivotable eccentrically about a pivot axis between a freewheel orientation and a braking orientation thereby pivoting the brake surface between the freewheel position and the braking position.

3. The brake device according to claim 2 wherein the pretensioning element is an elastically deformable element that interacts with the holder and the brake element such that, in the activated configuration, the pretensioning element pivots the brake surface into mechanical contact with the guide rail and wherein one end of the elastically deformable element interacts eccentrically with the eccentric element and is mechanically pretensioned in the deactivated configuration.

4. The brake device according to claim 1 wherein the pretensioning element is an elastically deformable element that interacts with the holder and the brake element such that, in the activated configuration, the pretensioning element pivots the brake surface into mechanical contact with the guide rail.

5. The brake device according to claim 4 wherein the pretensioning element is a spring.

6. The brake device according to claim 1 wherein the pretensioning element is an elastically deformable element, in particular as a spring ( 33 ), that interacts with the holder and the brake element such that, in the deactivated configuration, the pretensioning element is pretensioned in a first direction and in a fully engaged configuration of the brake element, the pretensioning element is pretensioned in a second direction transverse or opposite to the first direction, wherein, in the fully engaged configuration, the brake element is movable by friction on the guide rail, counter to the movement direction beyond a position in which the brake surface, moving from the freewheel position, first abuts the guide rail.

7. The brake device according to claim 6 wherein the pretensioning element is a spring.

8. The brake device according to claim 1 wherein the release element is a latch movable between a latched position and an unlatched position, and wherein the latch, in the latched position, retains the pretensioning element in the deactivated configuration and, in the unlatched position, releases the pretensioning element to the activated configuration.

9. The brake device according to claim 1 wherein the friction-generating element includes a pressure element and an actuator, wherein the actuator keeps the pressure element spaced apart from the guide rail in the unactuated state of the friction-generating element, and wherein the pressure element is pressed against the guide rail by the actuator in the actuated state of the friction-generating element.

10. The brake device according to claim 9 wherein the friction-generating element includes a mechanism for moving the pressure element toward a counter-bearing element, and wherein the guide rail is arranged between the pressure element and the counter-bearing element.

11. The brake device according to claim 1 wherein the friction-generating element includes an electromagnet.

12. The brake device according to claim 1 wherein the friction-generating element is pivotally connected to the brake element.

13. An elevator installation comprising:
a guide rail;
a traveling body movable in a guided manner along the guide rail in a movement direction;
a drive device for moving the traveling body; and
the brake device according to claim 1 attached by the holder to the traveling body and being arranged adjacent to the guide rail.

14. A method for releasing the brake device in the elevator installation according to claim 13 , the brake device having been previously activated such that the brake element is engaged in a fully engaged position by moving the brake element relative to the holder counter to a movement direction of the traveling body being braked, wherein the brake surface abuts the guide rail and the brake element is clamped between the guide rail and the holder, the method comprising the steps of:
actuating the friction-generating element of the brake device; and
moving the brake device by moving the traveling body using the drive device in a release direction opposite to the movement direction.

15. The method according to claim 14 wherein the traveling body is moved in the release direction until the brake element that is held stationary and braked on the guide rail by the actuated friction-generating element is moved relative to the holder into a fixing position in which the pretensioning element is in a position corresponding to the deactivated configuration, and the release element transitions from the released state to the retaining state to retain the pretensioning element in the deactivated configuration.

Assignees

• Inventio Ag

Inventors

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

Classifications

• B66B5/20 Primary

  by means of rotatable eccentrically-mounted members (B66B5/24 takes precedence) · CPC title