| 摘要 |
Apparatus for removing the backlash and free-play present between a worm (8) and worm wheel (10) in the gearbox of an electric power assisted steering system is disclosed, The worm (8) is provided on an output shaft (6) from an electric motor (4) and the wheel is provided on another separate shaft (9) (possibly the steering column). The wheel is fixed relative to a housing (1), and the worm is fixed relative to the housing through at least a first and a second support assembly (100, 200). The first support assembly (100) is provided at the end of the output shaft (8) distal from the motor (4) and comprises an eccentric bush (101) which can be rotated to adjust the radial position of the output shaft and hence worm gear. The second support assembly (200) allows for angular movement of the output shaft (6). The first support assembly (100) may be manually rotated or may automatically rotate under a spring force to adjust the amount of free-play. |
