Distance adjustment tool for assembly of circuit breaker and assembly of crank arm box of circuit breaker

Abstract

The invention relates to a distance adjustment tool for assembly of a circuit breaker and an assembly for a crank arm box of the circuit breaker. The distance adjustment tool comprises a crank arm limitation structure which is detachably assembled on the corresponding crank arm box during use for limiting the swinging of an input crank arm, the distance adjustment tool also comprises an adjustment rod arranged on a corresponding switching brake bar in series, and an adjustment screw rod is arranged on the adjustment rod and is in threaded connection with the switching brake bar for adjusting the distance between a corresponding movable contact and a fixed contact. The distance adjustment tool for the assembly of the circuit breaker, provided by the invention, can be used for adjusting the distance between the movable contact and the fixed contact and ensuring that inclined angles of input crank arms of different phases are consistent.

Description

technical field [0001] The invention relates to a distance adjusting tool for assembling a circuit breaker and a crank box assembly of the circuit breaker. Background technique [0002] Existing circuit breakers such as Figure 1-3 Shown: including the bottom frame 2, three crank box assemblies are arranged side by side along the left and right directions on the bottom frame, and the three-phase monopole 1 corresponding to each crank box assembly is also arranged on the bottom frame, and the crank box assembly It is equipped with a crank box 5 and a transmission shaft 3 rotatably assembled on the crank box. The transmission shaft is provided with an input crank arm 4 and an output crank arm 7. The adjacent input crank arms are connected through the interphase pull rod 6. It is connected with an opening and closing lever 8 with a moving contact 9 at the end, and the end of the opening and closing lever extends into the corresponding single pole, and each single pole is provid...

AI Technical Summary

Problems solved by technology

When the circuit breaker is assembled, it is necessary to adjust the opening distance of the dynamic and static contacts. The existing adjustment method is: when the three-phase single-pole is installed on the chassis, the consistency of the fracture dimensions of the three-phase single-pole is based on The characteristic tester reflects the asynchrony between the phases, and then adjust the opening distance of each dynamic and static contact by adjusting the effective connection length of the tie rods between the phases. At this time, adjusting the tie rods between the phases will inevitably cause the input crank The inconsistency of the inclination angle will inevitably lead to asynchronous closing and opening of the moving and static contacts of each phase; at the same time, the inclination deviation of the input crank arm of the three phases will inevitably cause deformation of the interphase tie rods and increase in motion resistance, affecting the circuit breaker. The operational reliability of the drive and the fatigue life of the transmission components

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