Circuit breaker capable of conveniently adjusting opening range and contacting travel

Abstract

The invention discloses a circuit breaker capable of conveniently adjusting opening range and contacting travel. The circuit breaker comprises driving connecting levers, upper connecting rods, a push rod, lower connecting rods, adjusting screw rods, insulating pull rods, contact pressure springs and movable conducting rods, wherein the upper end of each adjusting screw rod is connected with the corresponding lower connecting rod through a connector; the upper end of each connector is hinged to the corresponding lower connecting rod; a threaded hole is processed in the lower end of each connector; screw threads with different turning directions are processed at the two ends of each adjusting screw rod; each screw thread at the upper end is connected in the corresponding threaded hole of the corresponding connector in a screwing manner, and is fixed by a fixing nut; each screw thread at the lower end is connected in a corresponding threaded hole of the corresponding insulating pull rod in a screwing manner, and is fixed by a fixing nut. According to the circuit breaker, the opening range and contacting travel can be adjusted without the need of disassembling any part, and the adjustment is precise, convenient and quick.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a circuit breaker which can conveniently adjust the opening distance and contact stroke. Background technique [0002] The transmission principle of opening and closing of the existing solid insulated ring network cabinet circuit breaker is as follows: figure 1 shown. When the vacuum interrupter is in the opening state (Figure a), the moving contact 7 and the static contact 8 of the vacuum interrupter are separated by a distance H, which is called the opening distance. When closing, drive the crank arm 1 to swing clockwise, drive the push rod 2 to move to the left, and drive the adjustment screw 3, insulating pull rod 6, and moving conductive rod 5 to push the moving contact 7 of the vacuum interrupter to move to the static contact 8 , until the dynamic and static contacts touch (figure b), at this time, the driving crank arm 1 continues to swing, so that the contact pressure spring 4 produ...

AI Technical Summary

Problems solved by technology

[0004] When adjusting the opening distance and contact stroke of the existing circuit breaker (such as image 3 As shown), the connection between the adjusting screw 3 and the lower connecting rod 1 needs to be removed before the adjusting screw 3 can be rotated, and the adjusting screw 3 must be rotated at least half a circle each time, otherwise the hole at the head of the adjusting screw cannot be aligned with the cylindrical pin 2. This makes the adjustment impossible to be as fine as possible. Usually, multiple adjustments are required to meet the requirements specified in the technical conditions. , installed to cause damage to related parts

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