US 12,266,486 B2
Balance spring assembly for disconnector
JiaQuan Yan, Guangzhou (CN); ShengQiang Li, Beijing (CN); ZhanGang Lv, Beijing (CN); and WeiDong Zhang, Tianjin (CN)
Assigned to HITACHI ENERGY LTD, Zürich (CH)
Appl. No. 17/798,603
Filed by HITACHI ENERGY LTD, Zürich (CH)
PCT Filed Feb. 12, 2020, PCT No. PCT/CN2020/074930
§ 371(c)(1), (2) Date Aug. 10, 2022,
PCT Pub. No. WO2021/159334, PCT Pub. Date Aug. 19, 2021.
Prior Publication US 2023/0154693 A1, May 18, 2023
Int. Cl. H01H 3/30 (2006.01); H01H 3/38 (2006.01)
CPC H01H 3/3021 (2013.01) [H01H 3/3015 (2013.01); H01H 3/38 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A balance spring assembly for a disconnector, comprising:
a push rod partially and coaxially arranged in a blade of the disconnector, wherein the blade is rotatable about a first shaft to change an operation status of the disconnector, a first end of the push rod fixed to a second shaft so that the push rod is rotatable about the second shaft; and
a spring arranged in the blade and around the push rod, the spring held between a second end of the push rod and an end of the blade adjacent to the first shaft,
wherein the second shaft is arranged parallel to the first shaft to enable the push rod to axially move in the blade with a rotation of the blade to thereby compress or decompress the spring.