Safety brake device for an elevator installation

摘要

A safety brake device at a load receiving means of an elevator installation comprises brake equipment which co-operates with a guide rail of the load receiving means. The brake equipment includes a cam disc, which is rotatable about a cam disc axis and which for activation of the safety brake device is set into a rotation through an activation rotational angle, wherein the cam disc is so designed that the cam disc as a consequence of rotation through the activation rotational angle comes into contact with the guide rail, whereby the guide rail moving relative to the safety brake device when the load receiving means is travelling rotates the cam disc into a position in which the brake equipment and thus the safety brake device produce an intended braking action relative to the guide rail.

主权项

1. A safety brake device for a load receiving component of an elevator installation, the safety brake device comprising:
brake equipment, the brake equipment being configured to work with a guide rail for the load receiving component, the brake equipment comprising a cam disc rotatable about a cam disc axis; an electrically controlled activating mechanism, the activating mechanism being configured to activate the safety brake device by rotating the cam disc through an activation rotational angle such that the cam disc contacts the guide rail, the activating mechanism comprising a pivotably mounted activating lever and an activating spring, the activating spring causes a pivot movement of the activating lever, the activating lever being fixable in an initial position and being pivotally driven by the activating spring, the activating lever being movable toward an end position when the activating mechanism is released, the activating lever being coupled with the cam disc such that the pivot movement of the activating lever from the initial position toward the end position rotates the cam disc through the activation rotational angle; and wherein the cam disc comprises,
a periphery with a flat surface,a peripheral section adjoining the flat surface, the peripheral section having a radius increasing with rotational angle,a cylindrical projection, the cylindrical projection being eccentrically arranged at the cam disc and eccentrically with respect to the axis of rotation of the cam disc, the cylindrical projection comprising a convex outer surface receivable by a concave inner surface of a first brake element.