| 摘要 |
<p>An electric operation mechanism used in gas insulated metal-enclosed switchgear (GIS) adopts a gear/cam combined transmission device with a maximum output turn angle of three turns. In the gear/cam combined transmission device, a main shaft (18) is coaxially fixed with a driving fan-shaped gear (11) and a transmission gear (14). A transmission fan-shaped gear (10) is fixed with a driven cam (9) and sleeved on the main shaft (18) with a clearance for synchronously rotating around the main shaft (18). An output shaft (20) is coaxially fixed with a driven gear (22) which is meshed with the transmission fan-shaped gear (10). A driving cam (8) is fixed with a transmission gear (7) and sleeved on the output shaft (20) with a clearance for synchronously rotating around the output shaft (20). The electric operation mechanism also adopts a pair of cams (15, 16) to drive an auxiliary switch (17) to be switched. The auxiliary switch (17) abuts on a driving shaft such that the size of the mechanism is reduced. The electric operation mechanism has good transmission characteristics, small impact forces during starting and being put in place in switching on or switching off, high accuracy of the output turn angle, accurate and reliable location and preservation of being put in place in switching on or switching off.</p> |
