Miniature circuit breaker operation mechanism capable of realizing multi-control input and output

Abstract

The invention relates to an operation mechanism of a miniature circuit breaker. A handle, a first connecting rod, a second connecting rod and a third connecting rod of a main mechanism body are respectively articulated and connected by a first articulated shaft, a second articulated shaft and a third articulated shaft; the handle, a lock buckle, a skipping buckle and the third connecting rod are pivotally arranged on a first fixing plate and a second fixing plate by a first rotating shaft, a second rotating shaft, a third rotating shaft and a fourth rotating shaft; an auxiliary contact support of an auxiliary contact device is pivotally arranged on the fourth rotating shaft; an indicating piece of a display output device is pivotally arranged on the second rotating shaft; a release rod isarranged on the first fixing plate; the fourth rotating shaft is arranged on one side of a contacted surface near the release rod; and the second rotating shaft is arranged on one side near an extending direction of the handle. The operation mechanism not only can optionally access to an input device and an output device, but also has a product compact and reasonable in structure, small in volumeand good in operation performance for the optimization design of a structural layout and is convenient to assemble, debug and produce in large scale.

Description

technical field [0001] The invention relates to an operating mechanism of a low-voltage miniature circuit breaker, in particular to an operating mechanism of a selective protection circuit breaker. Background technique [0002] The miniature circuit breaker is a switch device with protective function commonly used in low-voltage electrical systems, and the operating mechanism is one of its main components. Through the operating mechanism, the circuit breaker can realize the on / off control of the main circuit (referred to as control output), and the circuit breaker can also accept external control to perform on / off of the main circuit (referred to as control input). The "control input" mentioned in this specification refers to the control input to the operating mechanism in the form of mechanical action and force, through which the control input of the mechanical action and force controls the operating mechanism to perform tasks, such as making the contact device Opening or ...

AI Technical Summary

Problems solved by technology

However, the components in the existing operating mechanism are directly installed on the casing of the circuit breaker, and the mechanism parts are complicated, so the installation and debugging are very difficult, the manufacturing is difficult, and the production cost is high.

Moreover, the operating mechanism is limited by its four-link structure and layout, the structure is too scattered, which is not conducive to assembly, and the wire path is long, so the volume of the circuit breaker has to be made larger

In order to realize multi-control input / output, it is also necessary to add control input / output devices and their coupling connection structure with the operating mechanism. Due to the structural limitations of the existing operating mechanism, it is impossible to rationally arrange the bimetal strips, electromagnetic tripping devices, and main contacts. The position of each control input / output device such as the head device and the auxiliary contact device cannot simplify the structure of the coupling connection between each control input / output device and the existing operating mechanism, which not only makes the structure of the circuit breaker more complex and bulky, but also due to the internal electrical Many connection nodes and long wire paths make manufacturing, assembly and debugging more difficult and labor-intensive

Due to the structural limitations of the existing operating mechanism, it is impossible to design a reasonable force system for multi-control input / output requirements, resulting in an unreasonable increase in force and friction between the moving parts, large operating force, and poor movement of the moving parts. Flexible, so that the movement flexibility and movement speed of the moving parts of the operating mechanism are reduced, and the operating mechanism of the prior art can only install the shared connection mechanism trip bar on the casing, which seriously limits the control of the input / output device. Reasonable overall structural layout is required, thus wasting the limited valuable space inside the circuit breaker

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