Retaining bolt for attaching e.g. disk brake to pivot mounting of rail vehicle, has magnetic sensor and permanent magnet generating and measuring electrical and/or magnetic field for measuring movement of retainer based on bolt

摘要

The bolt (6) has a hollow space (10) in which a rod- or strip-shaped retainer (11) is arranged, where the retainer is connected with the bolt at an attaching point (12). The bolt is tubular in shape in a region of the hollow space. A magnetic sensor (14) and a permanent magnet (16) generate and measure an electrical and/or magnetic field for measuring movement of the retainer based on the bolt at a measuring position with a distance from the attaching point. The retainer has same temperature expansion coefficient as the bolt.