Single-motor three-station mechanism for switch

Abstract

The invention discloses a single-motor three-station mechanism for a switch. The single-motor three-station mechanism comprises a frame, a driving device, a limit and separation mechanism, an electrical control device and an output shaft, wherein the driving device is mounted on the frame, the output shaft is connected with a switch shaft, and the driving device comprises a motor, a worm and worm gear pair, a clutch and a limit pin matched with the limit and separation mechanism. Manual shafts connected with a worm through a bevel gear pair are arranged on two sides of the worm respectively, an interlocking, indicating and auxiliary switch structure for interlocking manual operation and indicating on-off state is further arranged on the frame, the clutch is a torque clutch which is mounted at one end of the worm and abutted to a gear II mounted at the end of the worm, the gear II is engaged with a gear I mounted on a motor output shaft, a driving gear coaxial with the worm is engaged with a driven gear mounted on the output shaft, and the limit pin is fixed onto the end face of a worm gear.

Description

technical field [0001] The invention relates to a switch operating mechanism, in particular to a single-motor three-position mechanism suitable for operating an isolating / grounding switch assembly. Background technique [0002] High-voltage power distribution switchgear is generally divided into the following three types: the first is air-insulated conventional power distribution switchgear, referred to as AIS, its bus bar is exposed and directly in contact with the air, and the circuit breaker can be of ceramic column or tank type; the second is Hybrid distribution switchgear, referred to as H-GIS, the busbar adopts open type; the third type is sulfur hexafluoride gas insulated fully enclosed distribution switchgear, referred to as GIS. [0003] Among them, the above-mentioned new GIS using SF6 gas as the insulating medium occupies a small area, is light in weight, and is easy to achieve standardization. And with the development of technology, people have combined the two ...

AI Technical Summary

Problems solved by technology

[0006] However, the structure of the operating mechanism is relatively complicated, especially the clutch is arranged in the worm wheel, so that the clutch needs to bear a large torque, resulting in an increase in cost; at the same time, the coaxial installation of the clutch and the worm wheel is not convenient for the adjustment of the output angle. ; Furthermore, the free space of this two-way overrunning clutch itself has brought certain inaccuracies in the process of opening and closing operations.

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