A new transmission structure of SF6 circuit breaker
By employing an upper and lower arrangement of the operating mechanism at the front and the pole at the rear, along with a transmission chain that crosses the horizontal shaft and the spline shaft in the SF6 circuit breaker, the insulation and mechanical transmission efficiency problems of traditional circuit breakers are solved, achieving higher insulation performance and lower energy consumption, and improving the reliability and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI YUGUANG ELECTRIC CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-17
AI Technical Summary
The spatial layout of existing SF6 circuit breakers limits the insulation safety distance, has low mechanical transmission efficiency, high energy consumption, increases system complexity and maintenance difficulty, and limits the service life of the products.
The device adopts an upper and lower arrangement with the operating mechanism in the front and the SF6 pole in the rear, and forms a new type of transmission chain through the cross connection of the horizontal shaft and the spline shaft, which optimizes the spatial layout and realizes efficient energy conversion and output.
It significantly enhances insulation performance, reduces operating power loss, improves the strength and reliability of the transmission system, simplifies maintenance procedures, and extends service life.
Smart Images
Figure CN224519782U_ABST
Abstract
Claims
1. A novel transmission structure for an SF6 circuit breaker, characterized in that, include: Operating mechanism; Transmission assembly; A novel transmission structure (3) installed within the frame, the novel transmission structure being composed of the following mechanical linkage components: The main connecting plate is hinged to the SF6 pole and the double-fork crank arm respectively through pin holes; The double fork crank arm is hinged at one end to the main connecting plate and at the other end to the main connecting rod through a pin hole, and is mounted on the spline shaft in a mechanical tooth interlocking manner. The spring-loaded crank arm is mounted on the splined shaft in a toothed interlocking manner and is connected to the tension spring with a hanging plate through a pin hole; the splined shaft is longitudinally arranged in the frame and is rotatably supported by bearings and bearing seats; A horizontal axis is set horizontally in the frame. An output crank arm and two hanging spring crank arms are mounted on the horizontal axis. The output crank arm and the two hanging spring crank arms are all assembled with the horizontal axis by interlocking teeth. The main connecting rod assembly has its upper end connected to the output crank arm via a pin shaft, and its lower end connected to the double-fork crank arm via a pin hole. The tension spring with the hanging plate is connected to the hanging spring crank arm and the two hanging spring crank arms 2 through the pin hole. The other end of the tension spring is fixed to the frame by the swivel bolt, thereby providing the return spring force of the spline shaft and the horizontal shaft.
2. The new type transmission structure of SF6 circuit breaker according to claim 1, characterized in that, When the operating mechanism executes the closing or opening command, it drives the transmission assembly to rotate clockwise or counterclockwise; the output of the transmission assembly is linked by the cross shaft and the spline shaft to drive the main connecting plate to move left and right, so as to realize the closing or opening of the SF6 pole.
3. The new type transmission structure of SF6 circuit breaker according to claim 1, characterized in that, The operating mechanism has a spring energy storage function, which drives the transmission assembly to rotate after the energy is released.
4. The new type transmission structure of SF6 circuit breaker according to claim 1, characterized in that, The horizontal axis and the spline axis are arranged vertically within the frame to form a cross structure, in order to accommodate the layout requirements of the operating mechanism being in the front and the SF6 pole being in the rear.
5. The new type transmission structure of SF6 circuit breaker according to claim 1, characterized in that, The main connecting rod assembly consists of an intermediate part with a double-ended lead screw and two tubular parts with internal threads. The length of the main connecting rod assembly can be adjusted by screwing it in without removing the axle pin.
6. The new type transmission structure of SF6 circuit breaker according to claim 1, characterized in that, The connection between the spline shaft and the double fork crank arm and the spring-loaded crank arm, as well as the connection between the horizontal shaft and the output crank arm and the spring-loaded crank arm, are all mechanical tooth interlocking assembly.
7. The new type transmission structure of SF6 circuit breaker according to claim 1, characterized in that, The tension spring with the hanging plate is connected to the union bolt through a pin hole, and the union bolt is fixed to the frame by a standard nut to provide elastic reset of the horizontal axis and the spline axis.