| 摘要 |
1. The earthing switch is deigned for an electric power switchgear for medium voltages. It is equipped with an earthed supporting structure and known immobile contacts, fixed to supporting insulators and the driving shaft, secured with a bearing to the supporting structure. It is characterised in that each grip (1) of the mobile contacts (2) is equipped with an individual and independent driving mechanism, consisting of the bucket tightener (3), the pressing spring (4), the adjusting bolt (5) and the roller (6), secured to rotate at the end of the grip (1). The latter is secured in the fork (8) of the bearer (9) and rotates on the control shaft (7). The bearer has the form of a square duct, which contains the pressing spring (4), the bucket tightener (3) and the adjusting bolt (5). The rotation axis of the control shaft (7) is at the distance (a) from the perpendicular axis of the spring (4). The axis of the roller (6) is parallel to the axis of the control shaft (7) located at the distance (e) from the latter. The angle (β) between the spring (4) axis and the plane established by the axes of the control shaft (7) and the roller (6) is an acute angle. |
