| 摘要 |
A contact device of a breaker and having a flippable static contact, the contact device comprising: a static contact (10) embedded inside a static contact holder (40), and a static contact spring (50) and a positioning shaft (70) for installing the static contact spring (50) are disposed inside the static contact holder (40), and a shaft passing through the static contact (10) is also disposed inside the static contact holder (40). The shaft comprises a central shaft (71) passing through the rotation axis of the static contact (10), a bearing shaft (21) passing through the static contact (10) and restricting the static contact spring (50), and the static contact spring (50) sleeves the positioning shaft (70), and spring arms extending from both ends engages the bearing shaft (21) passing through the static contact (10). The static contact (10) is rotatably mounted on the static contact holder (40), and a repulsive force is generated on the contact to enable a moving contact and the static contact to flip at the same time, thus elongating an electric arc and accelerating the extinguishing of the electric arc. A stepped face passing through the shaft of the static contact (10) restricts the two sides of the static contact (10) to effectively prevent the static contact (10) from moving in the axial direction of the shaft, thus ensuring a contact area between the static contact and the moving contact, effectively reducing assembling difficulty and improving assembling efficiency. |
