BALANCE SPRING ASSEMBLY FOR DISCONNECTOR

摘要

A balance spring assembly for a disconnector(200). The balance spring assembly comprises a push rod (101)partially and coaxially arranged in a blade (201)of the disconnector(200) which is rotatable about a first shaft(103) to change an operation status of the disconnector(200), a first end of the push rod(101) fixed to a second shaft(202) so that the push rod (101)is rotatable about the second shaft(202); and a spring(102) arranged in the blade (201)and around the push rod(101), the spring(102) held between a second end of the push rod(101)and an end of the blade (201)adjacent to the first shaft(103), wherein the second shaft(202) is arranged parallel to the first shaft (103)to enable the push rod(101)to axially move in the blade(201) with a rotation of the blade(201) to thereby compress or decompress the spring(102). By arranging the balance spring assembly at least in part in the blade(201) of the disconnector(200), only one set of the spring(102) is needed. Furthermore, extra components such as the protective tube, the auxiliary spring and some connection elements are no longer needed. In this way, the manufacturing and assembling costs are significantly reduced. Furthermore, with this arrangement, the spring(102) can fully work during the whole process when the blade(201) is rotated from the open position to the close position.