| 摘要 |
PCT No. PCT/SE97/01485 Sec. 371 Date Feb. 19, 1998 Sec. 102(e) Date Feb. 19, 1998 PCT Filed Sep. 5, 1997 PCT Pub. No. WO98/13626 PCT Pub. Date Apr. 2, 1998An adjusting device for the fine adjustment of the angle of rotation between two rotary elements (1, 2), which are driving and driven, respectively, comprises first and second gear units (6, 17). The second gear unit (17) comprises two eccentric gear components (20, 20') which are internally connected via a coupling (21) that permits each component separately to perform eccentric translation movements. The sleeve components have external gear rings (22, 22') which cooperate with internal gear rings (23, 23'), that are co-rotatively connected with output and input rotary members (8, 9), respectively, of the first gear unit (6). The external gear ring (22, 22') of the individual eccentric gear component has a smaller diameter and fewer teeth than each internal gear ring (23, 23') and is eccentric relative to the same. By the fact that the second gear unit in one and the same step gives a large gear change, a relative rotary motion of, e.g., a stepping motor (19), after a further gear reduction in the first gear unit (6), may be geared down by an extremely large gear reduction and, thereby, provide an extremely fine adjustment of the driven element (2) in relation to the driving one (1). |
