TWM638072U - Dual independent circuit mechanism of miniature circuit breaker - Google Patents

Abstract

A miniature circuit breaker double independent circuit mechanism, which is used in the miniature circuit breaker, the miniature circuit breaker includes a bottom plate, a cover plate and a middle plate, the bottom plate is pivotally connected with a handle and combined with the cover plate, the middle plate is installed There is a coil, two fixed terminals and two arc-extinguishing chambers; the miniature circuit breaker has a dual independent circuit mechanism, including: a reset assembly installed in the miniature circuit breaker, the reset assembly includes a reset lever, and the reset lever is provided with a jumper Pull-off rod and a torsion spring, an upper connecting rod is installed above the returning rod; two mechanism components are installed on the front and rear sides of the returning component, the upper connecting rod is pivotally connected between the mechanism components, and the mechanism component includes a The support seat is pivotally connected with a movable member, and the movable member is provided with a tension spring. The mechanism component also has a main shaft and a trip lever shaft fixed on the bottom plate. The two support seats are sleeved on the main shaft, and the two The support seat and the return rod are sleeved on the trip rod rotating shaft.

Description

Miniature Circuit Breaker Double Independent Circuit Mechanism

This creation is about a miniature circuit breaker double independent circuit mechanism.

The miniature circuit breaker is an important component to protect electrical appliances. It is mainly used as short-circuit protection and to prevent severe overload. It can be applied to the main switch and partial current control switch used on the wiring. It will also be used to protect the motor load circuit on industrial machinery. As one of the protection devices, when the circuit breaker detects problems such as short circuit, leakage or severe overload, the circuit breaker can trip immediately to protect the circuit and electrical appliances.

One of the miniature circuit breakers is a double-circuit miniature circuit breaker, which uses two torsion springs plus a compression spring, combined with a mechanism composed of a return rod, a support seat and a movable member to operate synchronously, but it has the following problems:

1. The support seat and the mover are combined with a torsion spring and inserted into the main fulcrum, but because the torsion spring exerts a non-linear force, the mover cannot mesh with the contacts of the contactor every time when it is put in, resulting in poor contact and unstable contact pressure And let the temperature rise.

2. The return rod is inserted into the fulcrum of the support seat, and the other leg of the return rod is then buckled with the fulcrum of the support seat, but the return rod and the support seat have a large margin, which makes the return rod have the doubt of turning over, resulting in the hanging gold cannot be fixed, Tripping causes instability, affecting short-circuit characteristics and tripping characteristics.

3. The return rod is fixed on another fulcrum of the support seat, which is inconsistent with the support point of the mechanism, and the support The other fulcrum of the seat is far away from the support point of the mechanism, so the rotation angle of the return lever is large, and the tripping stroke is large, and the bending stroke of the two alloy plates cannot meet the requirements, making the tripping stroke unstable.

4. The mechanism is driven by a compressed spring. Because the amount of compression is too large and it is biased towards the base, the movement of the mechanism is easy to overturn, resulting in unstable movement.

The above-mentioned problems will make the mechanism of the circuit breaker unstable, and it is easy to cause poor insulation and withstand voltage in the short-circuit test, so that the short-circuit capacity cannot be improved, the reproducibility of the trip test is poor, and it is labor-intensive and time-consuming. At the same time, it is also difficult and costly to assemble the mechanism. Excessive missing.

Based on the above reasons, there is still room for improvement in the known technology. In view of this, the author of this work actively researches, adds years of experience in related product research and development, and after continuous testing and improvement, finally develops this creation.

The main purpose of this creation is to provide a dual-independent circuit mechanism for a miniature circuit breaker, which can stabilize the mechanism action of the circuit breaker, increase the breaking capacity, and reduce assembly man-hours and assembly costs.

In order to achieve the above-mentioned purpose, the invention provides a double independent circuit mechanism of miniature circuit breaker, which is applied in miniature circuit breaker. A middle plate is installed between the plates, a handle is pivotally connected to the bottom plate and combined with the cover plate, a coil is installed on the middle plate, and two fixed terminals and two arc-extinguishing chambers adjacent to the coil are respectively installed on the middle plate The front and rear sides respectively correspond to the base plate and the cover plate.

The dual independent circuit mechanism of the miniature circuit breaker includes: a reset assembly installed in the miniature circuit breaker, the reset assembly includes a reset rod, the reset rod is provided with a tripping pull rod and a torsion spring, the upper part of the reset rod An upper connecting rod is installed to buckle with the return rod; the return assembly Two mechanism components are installed on the front and rear sides of the body, and the upper link is pivotally connected between the mechanism components. The mechanism component includes a support seat, and the support seat is pivotally connected with a mover. point, the mover is provided with a tension spring, and the two ends of the tension spring are respectively fixed on the mover and the base plate, and the mechanism component also has a main shaft and a tripping lever shaft fixed on the base plate, and the two supporting seat covers Connected to the main shaft, the two support bases and the return rod are sleeved on the trip rod rotating shaft.

In order to further understand the characteristics and technical content of this creation, please refer to the following detailed description and drawings of this creation in detail. However, the attached drawings are for reference and illustration only, and are not used to limit this creation.

10: Bottom plate

11: Cover

12: Middle plate

13: handle

14: Coil

15: Fixed terminal

16: Arc suppression chamber

20:Return components

21:Return lever

22: Jump off the lever

23: torsion spring

24: Upper link

30: Mechanism components

31: Support seat

32:Movers

33: extension spring

34:Spindle

35: Trip lever shaft

Fig. 1 is a three-dimensional schematic diagram of the separation of the cover plate of the miniature circuit breaker.

Fig. 2 is a three-dimensional exploded view of the miniature circuit breaker and the invention.

Fig. 3 is a front view of the miniature circuit breaker.

Fig. 4 is a three-dimensional exploded view of the dual independent circuit mechanism of the miniature circuit breaker of this invention.

Please refer to Figure 1 and Figure 4. This invention relates to a double independent circuit mechanism of a miniature circuit breaker, which is applied in a miniature circuit breaker. The miniature circuit breaker includes a bottom plate 10, and a cover plate 11 is installed on the front surface of the bottom plate 10. The bottom plate 10 and the cover plate 11 A middle plate 12 is installed between them, the bottom plate 10 is pivotally connected with a handle 13 and combined with the cover plate 11, the middle plate 12 is equipped with a coil 14, and the coil 14 has two fixed terminals 15 and two arc suppression chambers adjacent to it 16 are installed on the front and rear sides of the middle plate 12 respectively, corresponding to the bottom plate 10 and the cover plate 11 respectively.

The miniature circuit breaker double independent circuit mechanism includes: a reset assembly 20, equipped with Located in the miniature circuit breaker, the reset assembly 20 includes a reset rod 21, the reset rod 21 is provided with a tripping pull rod 22 and a torsion spring 23, and an upper connecting rod 24 and the reset rod are installed above the reset rod 21. 21 buckle.

Two mechanism components 30 are installed on the front and rear sides of the return component 20, and the upper link 24 is pivotally connected between the mechanism components 30. The mechanism component 30 includes a support base 31, and the support base 31 is pivotally connected with a mover 32. , the mover 32 corresponds to the contact point of the two fixed terminals 15, the mover 32 is provided with a tension spring 33, and the two ends of the pull spring 33 are respectively fixed to the mover 32 and the bottom plate 10, and the mechanism assembly 30 is also A main shaft 34 and a tripping rod shaft 35 are fixed on the bottom plate 10 , the two supporting seats 31 are socketed on the main shaft 34 , and the two supporting seats 31 and the return rod 21 are socketed on the tripping rod rotating shaft 35 .

With the above structure, the double independent circuit mechanism of the miniature circuit breaker has the following characteristics:

1. The supporting base 31 is sleeved on the main shaft 34 by riveting, so that the size and concentricity of the components can be precisely controlled to ensure the stability of the mechanism.

2. The return rod 21 is centered and sleeved on the trip rod rotating shaft 35 to ensure smooth rotation and balance during tripping.

3. The mechanism components 30 are independently provided with the extension spring 33, and the functions of the two torsion springs plus the compression spring in the prior art are combined with the extension spring 33, so that the force on the two movers 32 is averaged so that the mechanism is not easy to be biased. The pendulum will not overturn because the action of the mechanism is centered, so that the contact pressure and tripping characteristics are stable, thereby improving the short-circuit capacity.

4. The mechanical components in the miniature circuit breaker are all assembled from bottom to top, and can be introduced into automatic assembly to save assembly man-hours and reduce costs.

To sum up, the double independent circuit mechanism of the miniature circuit breaker of this invention can make the circuit breaker The mechanical action of the device is stable, the breaking capacity is improved, and the assembly man-hours and assembly costs are reduced.

Although this creation has been disclosed above with a preferred embodiment, it is not used to limit this creation. Anyone who is familiar with this technology can make some changes and modifications without departing from the spirit and scope of this creation. Therefore, this creation The scope of protection shall be determined by the scope of the attached patent application.

10: Bottom plate

11: Cover

12: Middle plate

13: handle

14: Coil

15: Fixed terminal

16: Arc suppression chamber

20:Return components

21:Return lever

22: Jump off the lever

23: torsion spring

24: Upper link

30: Mechanism components

31: Support seat

32:Movers

33: extension spring

34:Spindle

35: Trip lever shaft

Claims (1)

A miniature circuit breaker double independent circuit mechanism, which is used in a miniature circuit breaker. The miniature circuit breaker includes a bottom plate, a cover plate is installed on the front end of the bottom plate, and a middle plate is installed between the bottom plate and the cover plate. A handle is pivotally connected to the bottom plate and combined with the cover plate. A coil is installed on the middle plate. The coil is adjacent to two fixed terminals and two arc suppression chambers are respectively installed on the front and rear sides of the middle plate, corresponding to the bottom plate. with the cover; The miniature circuit breaker has dual independent circuit mechanisms, including: A reset component, installed in the miniature circuit breaker, the reset component includes a reset rod, the reset rod is provided with a jump-off pull rod and a torsion spring, and an upper link is installed above the reset rod to buckle the reset rod ;and Two mechanism components are installed on the front and rear sides of the return component, and the upper link is pivotally connected between the mechanism components. The movable part is provided with a tension spring, and the two ends of the tension spring are respectively fixed on the movable part and the bottom plate, and the mechanism assembly also has a main shaft and a tripping lever shaft fixed on the bottom plate, the Two support seats are socketed on the main shaft, and the two support seats and the return rod are socketed on the tripping rod rotating shaft.

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