Elevator installation with a speed limiter

Patent metadata

Field	Value
Publication number	US-9975731-B2
Application number	US-201314650600-A
Country	US
Kind code	B2
Filing date	Dec 6, 2013
Priority date	Dec 10, 2012
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A speed limiter for an elevator installation includes a stand, a wheel rotatably mounted on the stand and a non-circularly extending guide surface rotatable with the wheel. A pendulum, which is pivotable relative to the stand, with a pendulum wheel bearing against the guide surface is provided. In addition, a restraining device is provided, which loads the pendulum wheel at least indirectly with a restraining force against the guide surface. A switching vane connected with the pendulum comes into engagement with a blocking dog, which dog is connected at least indirectly with the wheel, when the pendulum is pivoted out to a certain extent in which the pendulum wheel lifts off the guide surface. In addition, an actuating device that triggers the engagement between the switching vane and the blocking dog is provided.

First claim

The invention claimed is:

1. A speed limiter for an elevator installation comprising:
a stand;
a wheel rotatably mounted on the stand and driven in rotation by movement of an associated elevator car;
a mass body pivotally mounted on the stand in contact with the wheel, the mass body being pivoted out from the wheel when a predetermined rotational speed of the wheel is reached;
a switching vane pivotally mounted on the mass body, the switching vane being pivoted from a neutral pivot setting to a switching position by the pivoting of the mass body when the predetermined rotational speed of the wheel is reached;
a switch actuated by pivotation of the switching vane to the switching position; and
an actuating device for pivoting the mass body and the switching vane,
wherein the actuating device moves the switching vane into the neutral pivot setting from the switching position with a predetermined force so that pivotation of the switching vane occurs when the mass body is pivoted out,
wherein the actuating device is actuatable to pivot out the mass body together with pivoting the switching vane to the switching position against the predetermined force when the wheel is rotating at less than the predetermined rotational speed, and
wherein the actuating device upon a further actuation when the mass body is pivoted out moves the switching vane switching vane back into the neutral pivot setting when the wheel is stationary.

2. The speed limiter according to claim 1 including a non-circularly extending guide surface that is rotatable with the wheel, and wherein the mass body is a pendulum with a pendulum wheel bearing against the guide surface and a restraining device, which restraining device loads the pendulum wheel at least indirectly with a restraining force towards the guide surface, wherein the switching vane is connected with the pendulum and, when a predetermined pivoting-out movement of the pendulum occurs in which the pendulum wheel lifts off the guide surface, comes into an engagement with a blocking dog, which blocking dog is connected at least indirectly with the wheel, wherein the switching vane is pivoted from the neutral pivot setting to the switching position by the action of the blocking dog and thereby actuates the switch, wherein the actuating device lifts the pendulum wheel off the guide surface and brings the pendulum together with the switching vane into engagement with the blocking dog, and moves the switching vane into the neutral pivot setting, wherein the actuating device when actuated urges the switching vane into the neutral pivot setting so that pivotation of the switching vane is possible when the switching vane comes into engagement with the blocking dog.

3. The speed limiter according to claim 2 wherein the switching vane is pivotable about a fulcrum between the switching vane and the pendulum and the actuating device in at least one engagement setting of the switching vane in which the switching vane is in engagement with the blocking dog acts on the switching vane at least indirectly to pivot the switching vane about the fulcrum back into the neutral pivot setting.

4. The speed limiter according to claim 3 wherein the actuating device can draw an actuating element in an actuation direction by way of an actuating pin, an abutment element is provided at the fulcrum between the pendulum and the switching vane, and wherein the actuating device performs a function test by actuating the switching vane, by the actuating element and the abutment element, from the neutral pivot setting in which the pendulum wheel of the pendulum bears against the guide surface, through an at least substantially translational movement of the actuating element wherein the switching vane and the pendulum come into engagement with the blocking dog when the wheel is rotating.

5. The speed limiter according to claim 4 including a spring element for loading the actuating element against the actuating force.

6. The speed limiter according to claim 4 wherein the blocking dog and the switching vane are positioned so that the switching vane is pivoted about the fulcrum when the switching vane comes into engagement with the blocking dog when the wheel is rotating.

7. The speed limiter according to claim 6 wherein the blocking dog and the switching vane are positioned so that the switching vane is pivoted in a first pivot direction about the fulcrum when the switching vane comes into engagement with the blocking dog when the wheel is rotating in a first direction of rotation and is pivoted in a second pivot direction, opposite to the first pivot direction, about the fulcrum when the switching vane comes into engagement with the blocking dog when the wheel is rotating in a second direction of rotation opposite to the first direction of rotation, wherein when the switching vane is pivoted in the first pivot direction a first abutment element of the switching vane is pivoted closer to the actuating element than the abutment element at the fulcrum and when the switching vane is pivoted in the second pivot direction a second abutment element of the switching vane is pivoted closer to the actuating element than the abutment element at the fulcrum.

8. The speed limiter according to claim 2 wherein the switching vane has a dovetail-shaped engagement section by which the switching vane comes into engagement with the blocking dog and the blocking dog has a profile matched to the dovetail-shaped engagement section.

9. The speed limiter according to claim 1 including an actuating element and wherein the actuating device when actuated acts by the actuating element on at least one abutment element of the switching vane for resetting of the switching vane into the neutral pivot setting, wherein the actuating device acts by an actuating force on the actuating element wherein the actuating force determines the predetermined force by which the actuating device acts on the switching vane.

10. The speed limiter according to claim 1 wherein the switching vane when pivoted from the neutral pivot setting to the switching position actuates the switch, wherein the switch is a detenting switch that can be reset by remote activation.

11. The speed limiter according to claim 1 wherein the actuating device includes a stroke magnet generating an actuating force.

12. The speed limiter according to claim 1 wherein the actuating device is connected with a separate control device for remote activation of the actuating device.

13. An elevator with a speed limiter according to claim 1 including a trigger cable guided by a groove of the wheel and wherein the trigger cable is connected at least indirectly with a safety brake arranged at the elevator car.

14. A method of remote triggering and remote resetting of a speed limiter of an elevator car of an elevator installation, the method comprising the steps of:
actuating an actuating device to pivot out a mass body to bring the mass body into engagement with a wheel being driven in rotation by movement of the elevator car;
pivoting a switching vane from a neutral pivot setting to a switching position by the pivoting out of the mass body and the rotating wheel;
actuating a switch with the switching vane in the switching position, wherein the actuating device when actuated acts by a predetermined force on the switching vane to move the switching vane back into the neutral pivot setting, wherein the predetermined force is selected so that pivotation of the switching vane occurs when the mass body is pivoted out and engages with the rotating wheel, and wherein when the actuating device is actuated again the actuating device pivots out th

Assignees

• Inventio Ag

Inventors

• Osmanbasic Faruk
• Meierhans Daniel

Classifications

• B66B5/046 Primary

  of the pendulum or rocker arm type · CPC title