CN215955203U

CN215955203U - Auxiliary conversion device of circuit breaker

Info

Publication number: CN215955203U
Application number: CN202122604931.0U
Authority: CN
Inventors: 唐维春; 奚菊芳; 顾建青
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-04
Anticipated expiration: 2031-10-28

Abstract

An auxiliary conversion device of a circuit breaker belongs to the technical field of circuit breaker accessories. The circuit breaker includes base, pivot, goes up casing, operating device, moving contact, static contact and auxiliary switch, the base is installed with last casing cooperation, operating device drive pivot rotates to drive the moving contact action and realize the contact and the separation of moving contact and static contact, auxiliary switch installs the annex intracavity that sets up on last casing upper surface, and characteristics are: still including setting up the converting part that is used for realizing pivot and auxiliary switch transmission and connects on last casing, be provided with the opening on the diapire in annex chamber, the converting part on be provided with and be used for sheltering from open-ended shielding part, be provided with first converting part in the below of shielding part, first converting part pass the opening and contact the cooperation with the pivot. The advantages are that: the opening that is located between pivot and the auxiliary switch can be sheltered from to the shielding part of converter in the pivot rotation process, has improved the dielectric property ability of circuit breaker.

Description

Auxiliary conversion device of circuit breaker

Technical Field

The utility model belongs to the technical field of circuit breaker accessories, and particularly relates to an auxiliary conversion device of a circuit breaker.

Background

The circuit breaker accessory is used as derivation and supplement of the circuit breaker function, a control means is added for the circuit breaker, the protection function is expanded, and the application range of the circuit breaker is wider. The circuit breaker accessories are mainly divided into internal accessories and external accessories, wherein the internal accessories comprise a shunt release, an under-voltage release, an auxiliary switch and an alarm switch. The internal accessories of the existing circuit breaker are arranged in the accessory cavity of the upper cover, and can be arranged only by opening the cover plate.

The auxiliary switch of the circuit breaker changes state when the circuit breaker is opened and closed, and displays the on state and the off state of the circuit breaker. The traditional auxiliary switch realizes the functions through a transmission boss on a rotating shaft, specifically, the rotating shaft rotates in the opening and closing states of the circuit breaker, and the transmission boss on the rotating shaft drives the auxiliary switch to act so as to realize the switching of opening and closing signals when the rotating shaft rotates. However, in the existing circuit breaker, the accessory cavity of the cover corresponding to the rotating shaft structure needs to be provided with an opening to provide a moving space required by the transmission boss in the rotating shaft rotating process, and the opening can have certain influence on the dielectric property of the circuit breaker.

In view of the above-mentioned prior art, there is a need for an improvement of the structure of the existing circuit breaker, for which the applicant has made an advantageous design, the solution to be described below being created in this context.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an auxiliary conversion device of a circuit breaker, which overcomes the defects of the existing structure and can improve the dielectric property of the circuit breaker.

The utility model aims to achieve the aim that the auxiliary conversion device of the circuit breaker comprises a base, a rotating shaft, an upper shell, an operating mechanism, a moving contact, a static contact and an auxiliary switch, wherein the base and the upper shell are installed in a matched mode, a containing cavity is formed between the base and the upper shell, the moving contact, the static contact and the rotating shaft are arranged in the containing cavity, the operating mechanism drives the rotating shaft to rotate, so that the moving contact is driven to act to realize the contact and the separation of the moving contact and the static contact, and the auxiliary switch is installed in an accessory cavity arranged on the upper surface of the upper shell, and the auxiliary conversion device is characterized in that: the auxiliary conversion device comprises a conversion piece arranged on the upper shell and used for realizing transmission connection of a rotating shaft and an auxiliary switch, an opening is formed in the bottom wall of the accessory cavity, a shielding portion used for shielding the opening is arranged on the conversion piece, a first conversion portion is arranged below the shielding portion, and the first conversion portion penetrates through the opening to be in contact fit with the rotating shaft.

In a specific embodiment of the present invention, the converter is provided with a pair of symmetrical mounting legs at both sides of the rear end of the shielding portion, a space between the pair of mounting legs is configured as a mounting deformation region for mounting the mounting legs, a limiting portion for limiting the displacement of the converter is provided above the mounting legs, and the converter is provided with a second converting portion for operating the auxiliary switch to switch the indication signal above the front end of the shielding portion.

In another specific embodiment of the present invention, the upper housing includes an upper cover mounted on the base and a cover mounted between the base and the upper cover, the cover is configured as a bottom wall of the accessory chamber, the opening is opened on the bottom wall, and the switching member is mounted on the cover to isolate the rotating shaft from the auxiliary switch by the shielding part.

In another specific embodiment of the present invention, a first accommodating cavity for accommodating the converting element is disposed on the upper surface of the housing, first mounting portions are disposed on two sides of the tail end of the first accommodating cavity and corresponding to a pair of mounting legs of the converting element, and the mounting legs are rotatably disposed in the first mounting portions.

In a further specific embodiment of the present invention, the rotating shaft is provided with a driving portion at a radial outer side, and when the rotating shaft rotates, the driving portion pushes the first converting portion to act, so that the converting element rotates.

In another specific embodiment of the present invention, the mounting leg is cylindrical, the first converting portion and the limiting portion are boss structures, and the second converting portion is a circular truncated cone structure.

Compared with the prior art, the utility model has the advantages that the conversion part is additionally arranged between the rotating shaft and the auxiliary switch: the opening that is located between pivot and the auxiliary switch can be sheltered from to the shielding part of converter in the pivot rotation process, has improved the dielectric property ability of circuit breaker.

Drawings

Fig. 1 is an overall schematic diagram of the circuit breaker of the present invention.

Fig. 2 is a schematic structural view of the conversion member of the present invention.

Fig. 3 is a schematic structural view of the rotating shaft according to the present invention.

Fig. 4 is a schematic structural view of the upper cover according to the present invention.

Fig. 5 is a schematic view of the assembly of the housing and the rotating shaft according to the present invention.

Fig. 6a is a schematic diagram of a closing state according to an embodiment of the present invention.

Fig. 6b is a schematic diagram of an embodiment of the present invention in a switching-off state.

Fig. 7a is a schematic diagram of a closing state according to another embodiment of the present invention.

FIG. 7b is a schematic diagram of another embodiment of the present invention in an open state.

In the figure: 1, a base; 2. a rotating shaft 21. a driving part; 3. the structure comprises an upper shell, a first shell, an upper cover, a second shell, a first cover, a second cover shell, 311, a second containing cavity, 312, a second mounting part, 313, a second opening, 321, a first containing cavity, 322, a first mounting part, 323 and a first opening; 4, an auxiliary switch; 5. the converter, 51, the shielding part, 52, the first conversion part, 53, the mounting foot, 54, the mounting deformation area, 55, the second conversion part, 56 and the limiting part.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes in form and not essential to the inventive concept should be regarded as the protection scope of the present invention.

In the following description, any concept related to the directionality (or the directional nature) of up, down, left, right, front, and rear is intended to facilitate understanding by the public, and thus should not be construed as particularly limiting the technical solution provided by the present invention, with respect to the position state in which the drawings are being described.

Referring to fig. 1 to fig. 3, and with reference to fig. 6a, fig. 6b, fig. 7a, and fig. 7b, the present invention relates to an auxiliary switching device of a circuit breaker, where the circuit breaker includes a base 1, an operating mechanism, a rotating shaft 2, an upper housing 3, a movable contact, a stationary contact, and a release system (not shown in the figure). The base 1 and the upper shell 3 are installed in a matched mode, a containing cavity is formed between the base 1 and the upper shell, the moving contact, the static contact and the rotating shaft 2 are arranged in the containing cavity, the operating mechanism is fixed on the base 1, the rotating shaft 2 is hinged to the operating mechanism, the action of the operating mechanism is received, the action is transmitted to the moving contact and the static contact, the contact and separation operation is achieved, and the switching-on and switching-off operation of the circuit breaker is achieved. The circuit breaker switching device is characterized in that the movable contact and the fixed contact bear working current of the circuit breaker when being closed, the area of the rotating shaft 2 is a strong current area, an accessory cavity for accommodating the auxiliary switch 4 is formed in the upper surface of the upper shell 3, which is close to the left side and the right side of the operating mechanism, of the upper shell, the accessory cavity area is a weak current area, the auxiliary switch 4 is installed in the accessory cavity of the shell 3, the rotating shaft 2 drives the auxiliary switch 4 to act and provide a circuit breaker switching-on and switching-off indication signal when rotating, and the rotating shaft 2 and the auxiliary switch 4 are isolated from the weak current area by the upper shell 3.

The circuit breaker further comprises a conversion part 5, the conversion part 5 is arranged in an accommodating cavity formed in the bottom wall of an accessory cavity of the upper shell 3, the auxiliary switch 4 is arranged in the accessory cavity of the upper shell 3, an opening only allowing the rotating shaft 2 and the conversion part 5 to be in mutual rotating fit is formed in the bottom wall of the accessory cavity, and the opening can cause the risk that the dielectric property of a strong electric area of the rotating shaft 2 and a weak electric area of the accessory cavity is reduced. The auxiliary switch 4 is positioned above the conversion piece 5 and is used for providing a circuit breaker on-off indication signal. Specifically, the rotating shaft 2 is provided with a driving portion 21, the converter 5 is provided with a shielding portion 51 for shielding an opening of the cavity near the upper housing 3, and a first converting portion 52 is arranged below the shielding portion 51, and the first converting portion 52 penetrates through the opening to be in contact fit with the driving portion 21. When the rotating shaft 2 rotates, the driving portion 21 pushes the first converting portion 52 to operate, so that the converting piece 5 rotates, the shielding portion 51 shields the portion of the opening between the rotating shaft 2 and the auxiliary switch 4, and the dielectric performance between the rotating shaft 2 and the auxiliary switch 4 is improved.

Furthermore, the converter 5 is provided with a pair of symmetrical mounting legs 53 on both sides of the rear end of the shielding portion 51, a space between the pair of mounting legs 53 is formed as a mounting deformation region 54 when the mounting legs 53 are mounted, a stopper portion 56 for restricting the displacement of the converter 5 is provided above the mounting legs 53, and a second conversion portion 55 for switching the indication signal of the auxiliary switch 4 is provided above the front end of the shielding portion 51 of the converter 5. The mounting leg 53 is cylindrical, the first conversion part 52 and the limiting part 56 are boss structures, and the second conversion part 55 is a circular truncated cone structure.

Please refer to fig. 4, fig. 7a, and fig. 7b, which illustrate an embodiment. The auxiliary switch 4 is installed in an accessory cavity on the upper cover 31, the upper cover 31 is arranged between the rotating shaft 2 and the auxiliary switch 4 to isolate the rotating shaft 2 and the auxiliary switch 4 from each other, and the conversion piece 5 is installed on the upper cover 31. In this embodiment, the bottom wall of the accessory chamber of the upper cover 31 is provided with a second receiving chamber 311 for receiving the converting element 5, and the only opening for the mutual rotation matching of the rotating shaft 2 and the converting element 5 is a second opening 313 located at the bottom wall of the second receiving chamber 311. The first converting portion 52 passes through the second opening 313 to be in contact fit with the driving portion 21 on the rotating shaft 2, and the shielding portion 51 shields a portion of the second opening 313 between the rotating shaft 2 and the auxiliary switch 4. A second mounting portion 312 is disposed on two sides of the rear end of the second accommodating cavity 311 and corresponding to the pair of mounting legs 53 of the converter 5, and the mounting legs 53 are rotatably disposed in the second mounting portion 312. The second mounting portion 312 is open or slotted.

The assembly and movement process of the embodiment is implemented as follows: the two mounting legs 53 are respectively fitted into the second mounting portions 313 of the upper cover 31 by pressing the mounting deformation regions 54 of the mounting legs 53. The auxiliary switch 4 is installed in an accessory cavity provided on the upper cover 31. When the switching-off operation is performed, the rotating shaft 2 is driven by the operating mechanism to rotate, the driving portion 21 and the first converting portion 52 of the converting element 5 move in a matching manner, and the converting element 5 is driven to rotate around the mounting leg 53. The limiting part 56 limits the converter 5 after the converter 5 rotates in place, the second conversion part 55 drives the auxiliary switch 4 to act, and the auxiliary switch 4 provides a circuit breaker switching-on/off indication signal.

Referring to fig. 5, 6a and 6b, another embodiment is illustrated. The upper housing 3 comprises an upper cover 31 mounted on the base 1 and a cover 32 mounted between the base 1 and the upper cover 31, the cover 32 is a bottom wall of the accessory chamber, the opening is opened on the bottom wall, the converter 5 is mounted on the cover 32, and the rotating shaft 2 is isolated from the auxiliary switch 4 by a shielding part 51. In this embodiment, the upper surface of the housing 32 is provided with a first receiving cavity 321 for receiving the converting element 5, and the opening through which the rotating shaft 2 and the converting element 5 are rotatably engaged with each other is the first opening 323 at the bottom of the first receiving cavity 321. The first converting portion 52 passes through the first opening 323 to contact and cooperate with the driving portion 21, and the shielding portion 51 shields a portion of the first opening 323 between the rotating shaft 2 and the auxiliary switch 4. A first mounting portion 322 is disposed on two sides of the rear end of the first accommodating cavity 321 and corresponding to the pair of mounting legs 53 of the converter 5, and the mounting legs 53 are rotatably disposed in the first mounting portion 322. The first mounting portion 322 is open or slotted.

The assembly and movement process of the embodiment is implemented as follows: the housing 32 is mounted between the base 1 and the upper cover 31, and then the two mounting legs 53 are respectively fitted into the first mounting portions 322 of the housing 32 by pressing the mounting deformation regions 54 of the mounting legs 53. The auxiliary switch 4 is mounted in an accessory chamber in the cover 31. When the switching-off operation is performed, the rotating shaft 2 is driven by the operating mechanism to rotate, the driving portion 21 and the first converting portion 52 of the converting element 5 move in a matching manner, and the converting element 5 is driven to rotate around the mounting leg 53. The limiting part 56 limits the converter 5 after the converter 5 rotates in place, the second conversion part 55 drives the auxiliary switch 4 to act, and the auxiliary switch 4 provides a circuit breaker switching-on/off indication signal.

The circuit breaker can be two, tripolar or quadrupole circuit breaker, when being two-pole circuit breaker, supplementary conversion equipment sets up in the non-installation mechanism utmost point of circuit breaker, when being tripolar circuit breaker, supplementary conversion equipment sets up in the A looks or/and C of circuit breaker is in looks, when being quadrupole circuit breaker, supplementary conversion equipment sets up in the A looks or/and C looks or/and N of circuit breaker are in looks.

Claims

1. The utility model provides an auxiliary conversion equipment of circuit breaker, the circuit breaker includes base (1), pivot (2), goes up casing (3), operating device, moving contact, static contact and auxiliary switch (4), base (1) and last casing (3) cooperation installation to form between the two and hold the chamber, moving contact, static contact and pivot (2) set up and hold the intracavity, operating device drive pivot (2) rotate to drive the moving contact action, realize the contact and the separation of moving contact and static contact, the accessory intracavity that sets up on last casing (3) upper surface is installed to auxiliary switch (4), its characterized in that: the auxiliary conversion device comprises a conversion piece (5) arranged on an upper shell (3) and used for realizing transmission connection of a rotating shaft (2) and an auxiliary switch (4), an opening is formed in the bottom wall of an accessory cavity, a shielding portion (51) used for shielding the opening is arranged on the conversion piece (5), a first conversion portion (52) is arranged below the shielding portion (51), and the first conversion portion (52) penetrates through the opening to be in contact fit with the rotating shaft (2).

2. The auxiliary switching device of a circuit breaker according to claim 1, wherein the switching member (5) is provided with a pair of symmetrical mounting legs (53) at both sides of the rear end of the shielding portion (51), a space between the pair of mounting legs (53) is formed as a mounting deformation region (54) for mounting the mounting legs (53), a limiting portion (56) for limiting the displacement of the switching member (5) is provided above the mounting legs (53), and the switching member (5) is provided with a second switching portion (55) for operating the auxiliary switch (4) to switch the indication signal above the front end of the shielding portion (51).

3. An auxiliary switching device for a circuit breaker as claimed in claim 1, characterized in that said upper casing (3) comprises an upper cover (31) mounted on said base (1) and a cover (32) mounted between said base (1) and said upper cover (31), said cover (32) being configured as a bottom wall of said accessory chamber, said opening being open at said bottom wall, said switching element (5) being mounted on said cover (32) for isolating said rotary shaft (2) from said auxiliary switch (4) by means of a shutter (51).

4. The auxiliary switching device of a circuit breaker according to claim 3, wherein the upper surface of the housing (32) is provided with a first accommodating cavity (321) for accommodating the switching element (5), a first mounting portion (322) is formed on two sides of the tail end of the first accommodating cavity (321) and corresponding to a pair of mounting pins (53) of the switching element (5), and the mounting pins (53) are rotatably arranged in the first mounting portion (322).

5. The auxiliary switching device of a circuit breaker as claimed in claim 1, wherein the shaft (2) is provided with a driving portion (21) at a radially outer side, and when the shaft (2) rotates, the driving portion (21) pushes the first switching portion (52) to operate so as to rotate the switching member (5).

6. The auxiliary switching device of a circuit breaker according to claim 2, wherein the mounting leg (53) is cylindrical, the first switching portion (52) and the limiting portion (56) are boss structures, and the second switching portion (55) is a circular truncated cone structure.