CN215220635U

CN215220635U - Circuit breaker

Info

Publication number: CN215220635U
Application number: CN202120626810.3U
Authority: CN
Inventors: 王洋; 王岐; 徐涛
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-12-17
Anticipated expiration: 2031-03-26

Abstract

The utility model provides a circuit breaker, which relates to the technical field of molded case circuit breakers and comprises a control tripping unit main body, a magnetic fluxer and an auxiliary assembly; the control tripping unit main body is provided with a containing cavity, and the separating plate enables the containing cavity to be divided into a first containing cavity for installing a magnetic flux device and a second containing cavity for installing an auxiliary component; the auxiliary assembly comprises at least one group of micro switch group and a push rod; each micro switch group comprises two micro switches, and the two micro switches are arranged in an up-and-down symmetrical mode. The utility model provides an auxiliary assembly in circuit breaker includes micro-gap switch group, and the micro-gap switch of every micro-gap switch group of group adopts the longitudinal symmetry mode to set up, can increase the micro-gap switch's of installation quantity in the circuit breaker like this, and the push rod has realized the micro-gap switch's to the micro-gap switch of the micro-gap switch group of multiunit control to realize more control function.

Description

Circuit breaker

Technical Field

The utility model belongs to the technical field of moulded case circuit breaker's technique and specifically relates to a control dropout unit of moulded case circuit breaker is related to.

Background

The circuit breaker is internally provided with a plurality of micro switches which are arranged in the circuit breaker in a row and used for forming a logic circuit; the number of micro switches has a great influence on the number of logic circuits forming the circuit to realize the control functions, and a plurality of micro switches are required to be installed in order to enable the circuit breaker to have more control functions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit breaker to solve the micro-gap switch in the present circuit breaker small in quantity, technical problem that control function is few.

The utility model provides a circuit breaker, including control tripping unit main part, fluxer and auxiliary assembly;

the control tripping unit main body is provided with an accommodating cavity, a partition plate is arranged in the accommodating cavity, and the partition plate enables the accommodating cavity to be divided into a first accommodating cavity for installing a magnetic flux device and a second accommodating cavity for installing an auxiliary component;

the auxiliary assembly comprises at least one group of micro switch group and a push rod; each micro switch group comprises two micro switches, and the two micro switches are arranged in an up-and-down symmetrical mode.

The push rod is matched with each group of micro switch groups to enable the two micro switches in the micro switch groups to carry out switching state conversion.

Further, the push rod comprises a driving part and a conversion part, the conversion part is arranged in the second containing cavity, and the driving part is positioned outside the control tripping unit main body and connected with the conversion part;

the conversion part is used for turning on or turning off the micro switch, and the driving part is used for driving the conversion part.

Further, the push rod device also comprises a pressure spring, wherein the pressure spring is positioned at the upper end of the push rod, so that the push rod has a downward movement tendency.

Furthermore, a guide post is arranged on the push rod, one end of the pressure spring is sleeved on the guide post, and the other end of the pressure spring is abutted to the control tripping unit main body.

Furthermore, an installation column used for installing a microswitch is arranged in the second accommodating cavity, and an installation hole matched with the installation column is formed in the microswitch.

Further, the magnetic flux device comprises a magnetic yoke connected with the control tripping unit body, a tripping chamber and an electromagnetic coil positioned in the magnetic yoke;

the unhooking chamber is provided with an opening, and the opening faces the magnetic yoke and is sleeved on the magnetic yoke; and the extending direction of the hook part arranged on the unhooking chamber is the same as the direction of the opening of the unhooking chamber.

Further, the magnetic fluxer further comprises a permanent magnet, a movable iron core and a tripping spring;

the permanent magnet is fixedly arranged between the magnet yoke and the electromagnetic coil;

one end of the movable iron core is positioned in the electromagnetic coil, the other end of the movable iron core is positioned outside the electromagnetic coil and is connected with the unhooking chamber, and the movable iron core can act on the inner wall of the unhooking chamber and enables the unhooking chamber to move along the direction of the opening of the unhooking chamber in the opposite direction;

the unhooking spring is sleeved on the movable iron core and enables the movable iron core to have a trend of moving towards the inner wall of the unhooking chamber.

Furthermore, a blocking plate is arranged on the movable iron core, and the unhooking spring acts on the blocking plate.

Furthermore, a guide groove is formed in the unhooking chamber, a guide post is arranged on the magnetic yoke, and the guide post and the guide groove are matched to limit the moving track of the unhooking chamber.

Furthermore, a guide post is arranged on the unhooking chamber, a guide groove is formed in the magnetic yoke, and the guide post and the guide groove are matched to limit the moving track of the unhooking chamber.

The utility model provides an auxiliary assembly in circuit breaker includes micro-gap switch group, and the micro-gap switch of every micro-gap switch group of group adopts the longitudinal symmetry mode to set up, can increase the micro-gap switch's of installation quantity in the circuit breaker like this, and the push rod has realized the micro-gap switch's to the micro-gap switch of the micro-gap switch group of multiunit control to realize more control function.

And the magnetic fluxer and the auxiliary assembly are both arranged in the control tripping unit main body and are isolated by the partition plate, so that the influence between the magnetic fluxer and the auxiliary assembly is effectively isolated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic view of the internal structure of the circuit breaker shown in fig. 1;

fig. 3 is a schematic structural view of a push rod of the circuit breaker shown in fig. 1;

fig. 4 is a schematic view of the structure of the flux device of the circuit breaker shown in fig. 1;

fig. 5 is a schematic view of the internal structure of the magnetic flux device shown in fig. 4.

Icon: 100-a microswitch; 200-a push rod; 201-a drive section; 202-a converting section; 203-guide posts; 300-a pressure spring; 400-controlling the trip unit main body; 500-mounting a post; 600-a divider plate; 700-unhooking chamber; 800-a magnetic yoke; 900-a guide groove; 110-a guide post; 120-a solenoid coil; 130-a permanent magnet; 140-a movable iron core; 150-unhooking spring; 160-a barrier plate; 170-hook portion.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in fig. 1 to 5, the present invention provides a circuit breaker, which includes a control trip unit main body 400, a magnetic flux device and an auxiliary assembly;

the control trip unit main body 400 is provided with a cavity, a partition plate 600 is arranged in the cavity, and the partition plate 600 divides the cavity into a first cavity for installing a magnetic flux device and a second cavity for installing an auxiliary component;

the auxiliary assembly comprises at least one group of micro switch group and a push rod 200; each micro switch group comprises two micro switches 100, and the two micro switches 100 are arranged symmetrically up and down.

The push rod 200 is matched with each micro switch group to make the two micro switches 100 in the micro switch group switch.

The cavity of the main body of the control trip unit is divided into a first cavity and a second cavity by the partition plate 600, and the partition plate 600 can play a role in separating the magnetic flux device from the auxiliary assembly, thereby effectively reducing the influence between the magnetic flux device and the auxiliary assembly.

In order to enable the circuit breaker to realize more control functions, such as the function of realizing an alarm contact point and the like; the auxiliary assembly comprises one or more groups of micro switch groups, and each group of micro switch group comprises two micro switches 100 which are symmetrically arranged up and down; this doubles the number of micro switches 100 in the conventional circuit breaker, thereby further increasing the control function.

As shown in fig. 2 and 3, in order to facilitate control of the plurality of sets of microswitches 100, the push rod 200 includes a driving portion 201 and a converting portion 202, the converting portion 202 is disposed in the second cavity, and the driving portion 201 is located outside the control trip unit main body 400 and connected to the converting portion 202;

the switching part 202 is used for turning on or off the microswitch 100, and the driving part 201 is used for driving the switching part 202.

The driving part 201 of the push rod 200 is located outside the control trip unit body 400, and the switching part 202 can be moved by moving the driving part 201 to switch the action on different microswitches 100, that is, to start acting on one microswitch 100 in the microswitch group, and to make the switching part 202 act on another microswitch 100 in the microswitch group through moving the driving part 201.

When the auxiliary component includes a plurality of micro switch sets, the driving part 201 can cause the switching part 202 to act on the plurality of micro switches 100 located at the upper end or the lower end to switch to the plurality of micro switches 100 located at the lower end or the upper end.

In order to allow the switching part 202 to act on the plurality of micro switches 100 located at the lower end without being manually manipulated, a pressing spring 300 is further included, and the pressing spring 300 is located at the upper end of the push rod 200 to have a tendency to move downward the push rod 200.

The pressing spring 300 is always in a compressed state, so that the pressing spring 300 can make the push rod 200 have a downward movement tendency, and prevent the push rod 200 from moving upward, i.e., the switching part 202 on the push rod 200 is kept in contact with the micro switch 100 at the lower end and is kept in an on state.

In order to move the push rod 200 in a limited track, a guide post 203 is disposed on the push rod 200, one end of the pressure spring 300 is sleeved on the guide post 203, and the other end of the pressure spring abuts against the control trip unit main body 400.

One end of the pressure spring 300 is sleeved on the guide post 203, and the other end of the pressure spring is abutted against the inner wall of the control tripping unit main body 400; the guide post 203 can guide the pressing force of the pressing spring 300 to the push rod 200, so that the pressing spring 300 can always maintain the pressing force to the push rod 200.

In order to enable the plurality of microswitches 100 to be neatly and accurately installed in the control trip unit main body 400, an installation column 500 for installing the microswitches 100 is arranged in the second accommodating cavity, and an installation hole matched with the installation column 500 is arranged on the microswitches 100.

The microswitch 100 is provided with a mounting hole, and the mounting hole of the microswitch 100 is mounted corresponding to the mounting column 500, so that the mounting position of the microswitch 100 can be ensured to be accurate; this can increase the matching degree between the micro switch 100 and the push rod 200, thereby ensuring that the push rod 200 can accurately control the micro switch 100.

In order to fix the microswitch 100 better, the microswitch 100 is generally provided with two mounting holes; two mounting columns 500 corresponding to the mounting holes of the microswitch 100 are also arranged in the second accommodating cavity; this further limits the microswitch 100, making the microswitch 100 more accurately mounted and less prone to displacement.

Optionally, the magnetic flux device includes a magnetic yoke 800 for connecting with the control trip unit main body 400, a trip chamber 700, and an electromagnetic coil 120 located in the magnetic yoke 800;

the unhooking chamber 700 has an opening facing the magnetic yoke 800 and sleeved on the magnetic yoke 800; the extension direction of the hook 170 provided on the unhooking chamber 700 is the same as the direction of the opening of the unhooking chamber 700, and the unhooking chamber 700 and the hook 170 may be an integrally formed member.

As shown in fig. 5, further, the magnetic flux device further includes a permanent magnet 130, a movable iron core 140, and a decoupling spring 150;

the permanent magnet 130 is fixedly disposed between the yoke 800 and the electromagnetic coil 120; the permanent magnet 130 may also be disposed within an electromagnetic coil, typically permanent magnet 130 being located at an end of the electromagnetic coil 120 remote from the unhooking chamber 700;

one end of the plunger 140 is located inside the electromagnetic coil 120, the other end of the plunger 140 is located outside the electromagnetic coil 120 and is connected with the unhooking chamber 700, and the plunger 140 can act on the inner wall of the unhooking chamber 700 and make the unhooking chamber 700 move along the direction opposite to the direction of the opening of the unhooking chamber 700;

the unhooking spring 150 is sleeved on the movable iron core 140 and makes the movable iron core 140 have a tendency of moving towards the inner wall of the unhooking chamber 700.

When there is no current in the electromagnetic coil 120, since the yoke 800 is fixed, the unhooking chamber 700 is moved by the force of the operating mechanism along the direction of the opening of the unhooking chamber 700, so that the hook portion 170 of the unhooking chamber 700 is separated from the external component, the movable iron core 140 is attracted by the permanent magnet 130, and the movable iron core 140 overcomes the elastic force of the unhooking spring 150, so that the unhooking chamber 700 is maintained at the current position. When current is supplied to the solenoid coil 120, the movable iron core 140 cannot overcome the elastic force of the trip spring 150 because the yoke 800 is fixed, so that the trip chamber 700 moves in the direction opposite to the direction of the opening of the trip chamber 700, and the hook portion 170 of the trip chamber 700 is connected to an external member.

In order to enable the unhooking spring 150 to better apply elastic force to the movable iron core 140, a blocking plate 160 is arranged on the movable iron core 140, and the unhooking spring 150 acts on the blocking plate 160.

As shown in fig. 4, in order to fix a relative movement track between the unhooking chamber 700 and the yoke 800, a guide groove 900 is provided on the unhooking chamber 700, a guide post 110 is provided on the yoke 800, and the guide post 110 cooperates with the guide groove 900 to limit a movement track of the unhooking chamber 700.

The unhooking chamber 700 may be provided with a guide post 110, the yoke 800 is provided with a guide slot 900, and the guide post 110 cooperates with the guide slot 900 to limit a moving track of the unhooking chamber 700.

The utility model provides an auxiliary assembly of circuit breaker includes multiunit micro-gap switch group, and the micro-gap switch 100 of every micro-gap switch group of group adopts the longitudinal symmetry mode to set up, can increase the micro-gap switch 100's of installation quantity in the circuit breaker like this, and push rod 200 has realized the micro-gap switch 100's of the micro-gap switch group of multiunit control to realize more control function.

And the fluxer and the auxiliary components are both disposed in the control trip unit main body 400 and are isolated by the partition plate 600, thereby effectively isolating the influence between the fluxer and the auxiliary components.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A circuit breaker comprising a control trip unit body (400), a flux machine, and an auxiliary assembly;

the control tripping unit main body (400) is provided with a containing cavity, a partition plate (600) is arranged in the containing cavity, and the partition plate (600) divides the containing cavity into a first containing cavity for installing the magnetic fluxer and a second containing cavity for installing the auxiliary assembly;

the auxiliary assembly comprises at least one micro switch group and a push rod (200); each micro switch group comprises two micro switches (100), and the two micro switches (100) are arranged in an up-and-down symmetrical manner;

the push rod (200) is matched with each micro switch group to enable the two micro switches (100) in the micro switch group to carry out switching state conversion.

2. The circuit breaker according to claim 1, wherein the push rod (200) comprises a driving portion (201) and a converting portion (202), the converting portion (202) is disposed in the second cavity, the driving portion (201) is located outside the control trip unit main body (400) and is connected with the converting portion (202);

the conversion part (202) is used for turning on or off the micro switch (100), and the driving part (201) is used for driving the conversion part (202).

3. The circuit breaker according to claim 2, further comprising a biasing spring (300), wherein the biasing spring (300) is located at an upper end of the push rod (200), and wherein the biasing spring (300) causes the push rod (200) to have a tendency to move downward.

4. The circuit breaker according to claim 3, wherein the push rod (200) is provided with a guide post (203), one end of the pressure spring (300) is sleeved on the guide post (203), and the other end of the pressure spring abuts against the control trip unit main body (400).

5. The circuit breaker according to claim 1, wherein a mounting column (500) for mounting a micro switch (100) is arranged in the second cavity, and a mounting hole matched with the mounting column (500) is arranged on the micro switch (100).

6. The circuit breaker of claim 1 wherein said flux mechanism comprises a magnetic yoke (800) for connection to said control trip unit body (400), a trip chamber (700), and an electromagnetic coil (120) located within said magnetic yoke (800);

the unhooking chamber (700) is provided with an opening, and the opening faces to the magnetic yoke (800) and is sleeved on the magnetic yoke (800); and the extension direction of the hook part (170) arranged on the unhooking chamber (700) is the same as the direction of the opening of the unhooking chamber (700).

7. The circuit breaker of claim 6 wherein said flux machine further comprises a permanent magnet (130), a plunger (140), and a trip spring (150);

the permanent magnet (130) is fixedly arranged between the magnetic yoke (800) and the electromagnetic coil (120);

one end of the movable iron core (140) is positioned in the electromagnetic coil (120), the other end of the movable iron core is positioned outside the electromagnetic coil (120) and is connected with the unhooking chamber (700), and the movable iron core (140) can act on the inner wall of the unhooking chamber (700) and enables the unhooking chamber (700) to move along the direction opposite to the direction of the opening of the unhooking chamber (700);

the unhooking spring (150) is sleeved on the movable iron core (140) and enables the movable iron core (140) to have a tendency of moving towards the inner wall of the unhooking chamber (700).

8. The circuit breaker according to claim 7, characterized in that a blocking plate (160) is provided on said plunger (140), said trip spring (150) acting on said blocking plate (160).

9. The circuit breaker according to claim 6, wherein a guide groove (900) is provided on the unhooking chamber (700), a guide post (110) is provided on the magnetic yoke (800), and the guide post (110) cooperates with the guide groove (900) to limit a moving track of the unhooking chamber (700).

10. The circuit breaker according to claim 6, wherein a guide post (110) is disposed on the unhooking chamber (700), a guide groove (900) is disposed on the magnetic yoke (800), and the guide post (110) cooperates with the guide groove (900) to limit a moving track of the unhooking chamber (700).