Device for electrically braking a drive shaft

摘要

Disclosed is a device for electrical braking of a drive shaft (5) which is guided by a fixed frame (6). The device enables precise positioning of electric jaws (7) with respect to a brake disc (3). The device includes a brake disc (3); a braking element (2); electric jaws (7); at least one sliding block (8) and fastening means (4). The brake disc (3) is fixed to one end of the drive shaft (5). The brake element (2) is formed by the electric jaws (7) and the at least one sliding block (8). The electric jaws (7) and sliding block (8) are mounted in the proximity of the brake disc (3) such that the brake disc (3) passes at least partially through the electric jaws (7) and sliding block (8). Fastening means (4) fasten the electric jaws (7) and sliding block (8) to the frame (6) while providing the electric jaws (7) and sliding block (8) with degrees of freedom. Degrees of freedom are obtained by the combination of different connections which include a“flat plane contact”,“point contact”and“annular linear contact”. The“flat plane contact”,“point contact”and“annular linear contact”compensate for the misalignments and defects in the shape of the brake disc (3) when driven in rotation. The“flat plane contact”is formed by mounting the at least one sliding block (8) to a plate (10). The“point contact”is formed by a first pin fixed to the frame. The“annular linear contact”is formed by a second pin (14) fixed to the frame (6) and a swivel joint (16) which is placed around the second pin (14).