Screw drive type double-power source changeover switch

Abstract

The invention relates to a double-power source changeover switch, in particular, a screw drive type double-power source changeover switch. According to the technical schemes of the invention, the screw drive type double-power source changeover switch is characterized in that a drive switching mechanism comprises a motor which is arranged on a base and is located between two circuit breakers, an incomplete gear which is in linkage connection with the output shaft of the motor, as well as a first gear and a second gear which are located at two sides of the incomplete gear and are engaged with the incomplete gear; the first gear is connected with a first screw pair; a push handle is in linkage matching with the handle of one circuit breaker so as to drive the circuit breaker to be switched on or switched off; and a second nut on a second screw pair is provided with a second push arm. With the above technical schemes adopted, the screw drive type double-power source changeover switch provided by the invention has the advantages of simple structure, low cost and high reliability and dual-purpose performance. With the screw drive type double-power source changeover switch adopted, switching between a lock state and an unlock state can be carried out.

Description

technical field [0001] The invention relates to a dual power supply changeover switch, in particular to a screw drive type double power supply changeover switch. Background technique [0002] In order to realize the on-off switching of two molded case circuit breakers, some of the currently known dual-power automatic transfer switch transmission mechanisms are driven by the drive plate to drive the push and swing on both sides, and the drive plate rotates under the drive of the motor. The push pendulums slide approximately linearly along several supporting circular tables arranged in a straight line. The reason why the current one is called approximate linear motion is because there must be a matching gap between the push pendulum and the supporting circular tables, and in order to ensure the stroke, the track length of the push pendulum It is relatively long, and the force received by the push pendulum is relatively large during the working process. Theoretically, it is imp...

AI Technical Summary

Problems solved by technology

[0002] In order to realize the on-off switching of two molded case circuit breakers, some of the currently known dual-power automatic transfer switch transmission mechanisms are driven by the drive plate to drive the push and swing on both sides, and the drive plate rotates under the drive of the motor. The push pendulums slide approximately linearly along several supporting circular tables arranged in a straight line. The reason why the current one is called approximate linear motion is because there must be a matching gap between the push pendulum and the supporting circular tables, and in order to ensure the stroke, the track length of the push pendulum It is relatively long, and the force received by the push pendulum is relatively large during the working process. Theoretically, it is impossible to guarantee the linear motion of the push pendulum. In addition, there is a certain gap between the push pendulum and the retaining ring. The ring cannot guarantee that the push pendulum will not warp up under the condition of force

This will cause the design margin of the stroke to be "eaten", which will easily cause the circuit breaker to fail to buckle again after tripping or to make it difficult to close

Moreover, as the number of times the transfer switch operates increases, the wear between the push pendulum and the support round table will increase, resulting in a further increase in the gap, which will eventually lead to an increasing possibility of being unable to buckle again and fail to close; But conversely, increasing the design margin of the stroke will cause the force between the handle and the push pendulum to be very large when the circuit breaker is closed, especially when it is re-clamped, which will cause the motor to be overwhelmed and shorten the service life or the handle to break; In addition, the push-and-swing adjustable situation of the currently known dual power conversion switch appliances is as follows: ① there is no adjustable; ② can be adjusted, but only the direction can be adjusted by buckling; The ones are not independent of each other, and they are adjusted together (which will cause a contradiction between the re-buckle stroke and the closing stroke), and whether the axis of the adjustment screw on the top handle is vertically aligned with the handle, but oblique, which will affect the strength and rigidity of the threaded connection. to adversely affect

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