| 摘要 |
PCT No. PCT/EP87/00512 Sec. 371 Date Mar. 22, 1988 Sec. 102(e) Date Mar. 22, 1988 PCT Filed Sep. 9, 1987 PCT Pub. No. WO88/02079 PCT Pub. Date Mar. 24, 1988.A mechanical drive, especially a stepping drive which can be driven by a drive shaft (14) for the conversion of a rotary drive movement to an output rotary movement which follows a given law of movement and can be taken from an output shaft (16), is provided with a spring-biased safety coupling (22; 26; 28) which disengages upon overload. The spring (30) biasing the safety coupling is supported on a biasing element which is mounted in the drive casing (12) for movement by a given amount in the direction of an increase or reduction of the spring bias, and which is part of the output of a cam drive whose cam is coupled co-rotationally with the drive shaft or output shaft (14 and 16, respectively). |
