EP-4735310-A1 - ELECTROMECHANICAL BRAKE, BRAKING METHOD, AND USE THEREOF

EP4735310A1EP 4735310 A1EP4735310 A1EP 4735310A1EP-4735310-A1

Abstract

The invention relates to an electromechanical brake which is characterized by: a.) an electric motor (1) which drives a spindle (3) that has a rotational profile (2) so as to advance the brake, wherein the brake is designed such that a predefined position (P) between a pin element (5), which presses against the rotational profile (2) of the spindle (3), and the rotational profile (2) of the spindle (3) is maintained using a position detection process during the operation of the electromechanical brake; or b.) an electric motor (1) which drives a spindle (3) that has a pin element (5) so as to advance the brake, said brake being designed such that a predefined position (P) between the pin element (5), which presses against a rotational profile (2) of a force transmission element (4), and the rotational profile (2) of the force transmission element (4) is maintained using a position detection process during the operation of the electromechanical brake.

Inventors

STURM, Sebastian
MARQUARD, Thimo
HAARMANN, Hannes
BUTENHOLZ, Hans-Christian

Assignees

Atek Drive Solutions GmbH

Dates

Publication Date: 20260506
Application Date: 20240627

Claims (1)

1.) Use of a position detection system as set out in one of claims 1 to 9 in a brake according to one of claims 1 to 9.

Description

Electromechanical brake, braking method and use The invention relates to an electromechanical brake, a braking method and a use. A large number of electromechanical brakes are known from the state of the art, which in many cases have an electric motor that drives a rotating screw drive with a spindle with a rotation profile to apply the brake. A distinction is made between service brakes with controlled application force and emergency and holding brakes with a predetermined application force, for example for the de-energized state. For emergency and holding brakes, a pre-tensioned spring assembly is often used for the application in the de-energized state. The emergency brake is held open against the force of the applying spring assembly, for example by electromagnets. For larger emergency brakes with high application forces, there are limitations in scaling due to the holding forces to be handled. When such brakes, which are designed as service brakes, are closed in an emergency, the masses of the brake components involved must be moved over the usually flatly rising rotation profile of the spindle, which takes a certain amount of time due to the system. The problem at hand is therefore that, in certain emergency situations, the reliability of delivery cannot always be guaranteed in order to avoid major damage to the devices to be braked. The present invention is based on the object of designing a brake which, on the one hand, enables the controlled braking and release of rotating masses in the function of a service and holding brake and, on the other hand, serves or can serve as a fast-reacting emergency brake when opened. This object is achieved by an electromechanical brake according to the invention according to claim 1, a method according to claim 10 and a use according to claim 11. The electromechanical brake according to the invention is one: a.) with an electric motor that drives a spindle with a rotation profile to apply the brake, the brake being designed in such a way that a predefined position between a bolt element pressing on the rotation profile of the spindle and the rotation profile of the spindle is maintained by means of position detection during operation; or b.) with an electric motor that drives a spindle with a bolt element to apply the brake, the brake being designed in such a way that a predefined position between the bolt element pressing on a rotation profile of a force transmission element and the rotation profile of the force transmission element is maintained by means of position detection during operation in order to realize reproducible operating processes. In this context, it is advantageous and proven if the position detection is accomplished by driving the bolt element against a slope via the electric motor, so that at the point on the slope where the bolt element has driven against the slope, the increased current consumption of the electric motor detects the position of the bolt element in relation to the slope. In this context, it is advantageous and proven if the position detection is accomplished by means of a rotary encoder in that the rotary encoder mounted on the electric motor clearly determines the angular position of the electric motor in every position and by fixing the force transmission element in its rotational movement and by the rigid connection of the electric motor to the spindle, the position of the spindle relative to the bolt element can be clearly determined. The position of the bolt element defined during operation and the rotation profile of the spindle ensure a reproducible and safe axial movement of the bolt element and the brake pad interacting with the bolt element. Furthermore, it is advantageous, as proven, if the brake according to the invention is characterized: a.) with an electric motor that drives the spindle having the rotation profile to apply the brake, wherein the brake is designed in such a way that when the brake is applied, the spindle, whose rotation profile has a/the slope, is rotated, wherein the spindle interacts with the force transmission element that is subject to a spring force of a spring element that applies the brake and that has the at least one bolt element, so that the bolt element is guided over the slope, so that an axial movement of the force transmission element is achieved, which interacts with a brake pad, so that the brake pad is also moved axially to apply the brake; or b.) with an electric motor which drives the spindle having the bolt element to apply the brake, the brake being designed in such a way that the spindle is rotated when the brake is applied, the spindle interacting with the force transmission element which is subject to a spring force of a spring element which applies the brake and which has a rotation profile which has a slope, so that the at least one bolt element is guided over the slope, so that an axial movement of the force transmission element is achieved, which interacts with a brak