Resolver bearing

Abstract

The invention relates to a compact resolver bearing (1) constructed in a particularly simple manner. This is achieved in that the corresponding coils P, S are arranged in the annular chamber (7) formed between the bearing rings (2, 3), said annular chamber (7) being sealed by two circular ring discs (8.1, 8.2), each of said circular ring discs (8.1, 8.2) being non-rotatably mounted on another ring (2, 3) and extending radially in the direction of the other ring (2, 3) while maintaining a slight axial distance A from the respective other circular ring disc (8.2, 8.1). In order to modulate the magnetic flux generated by the toroidal coil P1 in the bearing (1), the circular ring discs (8.1, 8.2) are each provided with a segment (15.1, 15.2) made from a magnetically permeable material. The changeable mutual overlapping of the segments during rotation causes the magnetic resistance of the corresponding magnetic circuit M1, M2 to change. Each magnetic circuit has two circular ring discs, toroidal coils that act as a primary coil and a secondary coil, each extending around the axis of rotation, the magnetically permeable bearing rings and a further component (4, 19) provided between the bearing rings and made from a magnetically permeable material.

Description

technical field [0001] The invention relates to a so-called resolver bearing, that is to say a rolling bearing arrangement with an angle sensor or rotational speed sensor according to the preamble of claim 1 . Background technique [0002] A generic device of this type comprising a rolling bearing and an angle sensor, known as a resolver, in the form of an absolute encoder is known, for example, from US 2006 / 0087315 A1. The angle sensor has a stator connected to the outer ring of the rolling bearing and a rotor interacting with the stator, which is designed as an eccentric ring and is formed by the inner ring of the rolling bearing. [0003] Another rolling bearing equipped with a sensor for detecting a rotational parameter is known from EP 1 518 126 B1. In this case, the tiny transmitter and receiver coils of the sensor are arranged on a carrier, ie the substrate of the printed circuit. Furthermore, a processing switching circuit including an oscillator and a phase demodu...

AI Technical Summary

Problems solved by technology

[0007] For example it is easy to see that constructing such a resolver bearing is very expensive, since a series of different components must be provided in order to realize the resolver bearing

Furthermore, it is considered disadvantageous that the structural width of the rolling bearing arrangement in the direction of the axis of rotation is significantly increased due to the connection of the rolling bearing arrangement with the angle sensor

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