Spring assembly and spring operating mechanism using the same

Abstract

The invention relates to a spring assembly and a spring operating mechanism using the same. The spring assembly comprises a front spring seat, a rear spring seat, and transmission rods, wherein the front ends of the transmission rods are connected with corresponding chains. Transmission rod guide sleeves are fixedly arranged at the rear spring seat, wherein the axis of each transmission rod guide sleeve extends along the front-back direction; the transmission rods move in a guiding mode and pass through inner holes of the transmission rod guide sleeves; and the transmission rod are located at the rear side of the front spring seat. Besides, chain through holes are formed in the front spring seat, wherein the axis of each chain through hole extends along the front-back direction and chains pass through the chain through holes. With the spring assembly and the spring operating mechanism using the same, the distance between the reversing chain wheel and the transmission rod can be reduced.

Description

technical field [0001] The invention relates to a spring assembly and a spring operating mechanism using the spring assembly. Background technique [0002] At present, the spring operating mechanism for circuit breakers is becoming more and more popular, but there is a common problem of low operating energy. To achieve the operating energy of the closing spring of the spring operating mechanism above 10kJ and the operating energy of the opening spring above 7kJ, the installation size, Affected by factors such as safety and reliability, it is more difficult to use a single spring. The best way is to use a combined spring. An existing spring operating mechanism using combined springs, such as "a high-power spring operating mechanism suitable for high-voltage and ultra-high voltage circuit breakers" disclosed in Chinese patent CN202126942U, includes an energy storage device, The energy device includes a motor and an energy storage shaft. The energy storage shaft is provided wi...

AI Technical Summary

Problems solved by technology

The problems existing in this energy storage device of the spring operating mechanism are: 1. In order to realize the reliable guidance of the transmission rod, the front and rear ends of the transmission rod are guided and moved respectively on the front spring seat and the rear spring seat, so that As a result, the length of the transmission rod must be very long, at least greater than the axial length of the spring. In order to prevent the transmission rod from interfering with the corresponding reversing sprocket when it moves forward, it is necessary to ensure that the distance between the reversing sprocket and the transmission rod There is enough distance between them, which will increase the space occupied by the entire spring operating mechanism, which is not conducive to the miniaturization of the spring operating mechanism; 2. The buffer has the same damping effect on the output shaft during the opening and closing process , which is very inconsistent with the actual needs of the spring operating mechanism, because in actual work, the buffer has less influence on the closing process, the better, and the closing force of the closing spring is expected to be completely transmitted to the moving contact 3. The buffer has a damping effect on the output shaft at the beginning of closing and opening of the dynamic and static contacts, which will It affects the initial speed of closing and opening of the moving and static contacts, and the moving contacts are easily damaged by the arc

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