| 摘要 |
FIELD: electric engineering. ^ SUBSTANCE: pull-in-pull-out device for air circuit breaker of high switching capacity and size comprises the following components: movable plate engaged with threaded part of spindle with the possibility to make reciprocal motion; rack gear installed on upper surface of movable plate with the possibility to make reciprocal motion together with reciprocal motion of movable plate; pinion engaged with rack gear; cam rotated by moving force transmitted from pinion, due to availability of teethed part engaged with pinion and having radius higher than radius of pinion; axis installed on frame in position adjacent to middle of height between electric contacts of frame, so that cam efficiently with stands loads of the main body and executed reaction force, when the main body and frame are electrically connected to each other; and driving emerging part that is distant from the main body and which moves together with the main body and connected to cam so that to transmit moving force from cam to the main body. ^ EFFECT: capacity of device to stably withstand loads from the main body in process of pull-in operation and reaction force produced when electric contact of the main body and electric contact of frame are connected to each other. ^ 10 cl, 11 dwg |
