CN212257313U

CN212257313U - Miniature circuit breaker operating device

Info

Publication number: CN212257313U
Application number: CN202020952227.7U
Authority: CN
Inventors: 黄燮云; 周文; 郑伟建; 肖朋
Original assignee: Hangzhou Taimu Electrical Co ltd
Current assignee: Hangzhou Taimu Electrical Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-12-29
Anticipated expiration: 2030-05-29

Abstract

The application discloses miniature circuit breaker operating device, relate to circuit breaker technical field, including the shell body and fix the static contact on the shell body, the inboard of shell body is rotated and is connected with handle body and contact carrier, the contact carrier rotates and is connected with the hasp body, the contact carrier is provided with and is used for the moving contact that matches with the static contact, the handle body is pegged graft and is had one end and hasp body coupling and be used for driving the U type push rod that moving contact and static contact opened and shut, be provided with handle spring between handle body and the shell body, be provided with the hasp spring between contact carrier and the hasp body, the contact carrier is provided with the connection post of inserting, the one end of connecting the post of inserting is pegged graft at the hasp body, be provided with the location socket on the shell body, be provided with in the location socket and supply to connect the other end of post of. This application realizes that contact carrier's rotation and translation go on simultaneously, and then effectively promotes the effect of breaking speed.

Description

Miniature circuit breaker operating device

Technical Field

The application relates to the technical field of circuit breakers, in particular to a miniature circuit breaker operating mechanism.

Background

The miniature circuit breaker is an important control and protection device in a low-voltage distribution system, and can quickly cut off fault current when the distribution system has overload and short-circuit faults so as to protect the distribution system and electrical equipment. The fault current breaking capacity is one of the most important performance evaluation indexes of the miniature circuit breaker, the structure and the dynamic characteristics of the operating mechanism are key influence factors of the breaking capacity of the circuit breaker, and the design and optimization key points of the operating mechanism of the miniature circuit breaker are provided for how to improve the breaking speed and the mechanical life of the operating mechanism when a system fails.

Chinese patent No. CN210296268U discloses a circuit breaker, which includes an electric leakage tripping mechanism, a short circuit tripping mechanism and an operating mechanism, wherein the operating mechanism is located on one side of a fixed contact of the short circuit tripping mechanism, the electric leakage tripping mechanism is located on one side of the short circuit tripping mechanism away from the fixed contact, an executing member is arranged between the electric leakage tripping mechanism and the operating mechanism, the electric leakage tripping mechanism cooperates with the operating mechanism through the executing member, the operating mechanism is located on one side of the fixed contact of the short circuit tripping mechanism, and includes a contact support, a latch and a trip, and a moving contact is disposed on the contact support and is linked with the contact support.

But this circuit breaker is for utilizing the hasp and fixing the moving contact in the closing position through contact support, through the jump knot with the hasp unblock, the moving contact realizes breaking around fixed pivot fast revolution under the reset spring effect, and the sub-assembly that consequently adopts is more, appears easily controlling the problem of sensitivity difference and trouble, and then influences the life of circuit breaker, remains to be improved.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present application is to provide a miniature circuit breaker operating mechanism to achieve the purpose of prolonging the service life of a circuit breaker while significantly increasing the opening and closing speed of the circuit breaker.

The specific scheme is as follows:

an operating mechanism of a miniature circuit breaker comprises an outer shell and a fixed contact fixed on the outer shell, wherein the inner side of the outer shell is rotatably connected with a handle body and a contact support, the contact support is rotatably connected with a lock catch body, the contact support is provided with a moving contact matched with the fixed contact, the handle body is inserted with a U-shaped push rod, one end of the U-shaped push rod is connected with the lock catch body and used for driving the moving contact and the fixed contact to be opened and closed, a handle spring is arranged between the handle body and the outer shell, a lock catch spring is arranged between the contact support and the lock catch body, the contact support is provided with a connecting plug post, one end of the connecting plug post is inserted in the lock catch body, a positioning socket is arranged on the outer shell, a switching slot which is used for inserting the other end of, and the positioning socket is sleeved with a main return spring positioned between the contact support and the outer shell.

Preferably: one end of the adapter slot, which is far away from the handle body, forms an opening on the positioning socket, and the other end of the adapter slot is provided with an inclined side wall.

Preferably: the moving contact is fixedly connected with the contact support through a bolt.

Preferably: still include two gold structures, the lock catch body is integrative to be connected with U-shaped drive division that opens circuit, the drive division that opens circuit be provided with two gold structures match and be used for driving the drive post of miniature circuit breaker operating device motion.

Preferably: the lock catch body is provided with a spring catch barrel which is inserted on the lock catch spring, one end of the connecting insertion column is inserted in the spring catch barrel, one end of the lock catch spring, which is close to the handle body, is abutted against the lock catch body, the other end of the lock catch spring is abutted against the contact support, and the lock catch spring is used for driving the lock catch body to do rotary motion far away from the handle body.

Preferably: the shell body is provided with a butt column, one end of the main reset spring close to the handle body is in butt with the contact support, and the other end of the main reset spring is in butt with the butt column.

Preferably: the contact support is provided with a rotating and pushing slot which is matched with the limiting slot and used for inserting one end of the lock catch body penetrating through the limiting slot.

Preferably: the rotating and pushing slot comprises a sliding slot close to one end of the handle body and a jump buckle slot connected with the sliding slot.

Preferably: the contact support is provided with a spring buckle hook, one end of the buckle spring close to the handle body is abutted to the buckle body, and the other end of the buckle spring is abutted to the spring buckle hook.

Preferably: the outer shell is provided with a handle rotating column inserted in the handle body, one end of the handle spring close to the contact support is abutted to the handle body, and the other end of the handle spring is abutted to the outer shell.

According to the above technical scheme, the application provides a miniature circuit breaker operating device, and this miniature circuit breaker operating device has following beneficial effect:

1. the use of parts of the operating mechanism of the miniature circuit breaker is reduced, so that the probability of occurrence of faults is reduced, and the use reliability of the operating mechanism of the miniature circuit breaker is effectively improved;

2. the main reset spring provides reset acting force and contact pressure, so that the connecting plug column inserted in the adapter slot on the contact support moves and rotates in the adapter slot when the circuit breaker is switched on and off, the effect of simultaneous rotation and translation of the contact support is realized, and the switching-on and switching-off speed of the operating mechanism of the miniature circuit breaker is obviously improved;

3. the U-shaped push rod is driven by the handle body to move so as to start the operating mechanism of the miniature circuit breaker, the lock catch body is locked on the U-shaped push rod by the lock catch spring, so that one end of the U-shaped push rod, which is inserted into the rotary push slot, drives the contact support to rotate, at the moment, the main return spring and the handle spring are stressed and compressed to form elastic restoring force, the connecting inserting column on the contact support rotates in the rotary push slot and translates towards one end of the opening, and the main return spring provides transverse supporting force for the contact support; therefore, when the miniature circuit breaker operating mechanism is switched off, the latch body is stressed to reset, the U-shaped push rod does not receive the thrust of the limiting slot any more due to the rotation of the latch body, so that the handle body is restored to the original position under the elastic restoring force of the handle spring, and the contact support is translated and rotated to one end close to the inclined side wall through the elastic restoring force of the main restoring spring under the acting force of the U-shaped push rod, so that the aims of quick switching-off and resetting are fulfilled.

Drawings

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

Fig. 1 is a schematic structural view of a miniature circuit breaker operating mechanism disclosed in the present application;

fig. 2 is an exploded view of the operating mechanism of the miniature circuit breaker as disclosed in the present application;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is a schematic structural view of an outer housing of the miniature circuit breaker operating mechanism disclosed herein;

fig. 5 is a schematic view of a matching structure of the circuit breaker mechanism and the bimetal structure disclosed in the present application.

Description of reference numerals: 1. an outer housing; 11. a handle rotary column; 12. positioning the socket; 121. a switching slot; 122. an inclined side wall; 13. a butting post; 2. a handle body; 3. a U-shaped push rod; 4. a contact holder; 41. rotating and pushing the slot; 411. a sliding slot; 412. a jump buckle slot; 42. connecting the inserted columns; 43. a spring buckle hook; 5. a lock catch body; 51. limiting slots; 52. a spring buckle barrel; 53. a circuit-breaking driving part; 531. a drive column; 54. a double gold structure; 6. a latch spring; 7. a moving contact; 8. a main return spring; 9. a handle spring.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, an operating mechanism of a miniature circuit breaker includes an outer housing 1 and a stationary contact fixed on the outer housing 1. A handle body 2 and a contact support 4 are rotatably connected to the inner side of the outer casing 1, and a latch body 5 is rotatably connected to the contact support 4. The handle part of the handle body 2 penetrates out of the outer shell body 1 and is used for controlling the opening and closing state of the miniature circuit breaker operating mechanism. The contact support 4 is provided with a moving contact 7 which is used for being matched with a static contact, wherein the moving contact is fixedly connected with the contact support mainly through a bolt, and other connection forms such as clamping connection, welding connection and the like can be adopted. Handle body 2 is pegged graft with the one end of U type push rod 3, the other end of U type push rod 3 is connected with the hasp body 5 and is connected with contact support 4 to drive moving contact 7 and static contact open and shut, it is specific, can promote contact support 4 through U type push rod 3 and rotate when rotating handle body 2, because contact support 4 passes through hasp spring 6 hasp connection with hasp body 5, so that hasp body 5 follows contact support 4 and rotates, make moving contact 7 and the static contact formation closed circuit in the shell body 1 after contact support 4 rotates.

As shown in fig. 2, 3, and 4, a handle spring 9 is provided between the handle body 2 and the outer case 1. And a handle rotary column 11 inserted in the handle body 2 is arranged on the outer shell 1 to realize rotary connection through the handle rotary column 11. One end of the handle spring 9 close to the contact support 4 is abutted against the handle body 2, the other end of the handle spring is abutted against the outer shell 1, and then when the handle body 2 rotates towards one end of the contact support 4, the handle spring rotates towards the direction of realizing the contact between the moving contact 7 and the static contact, the handle spring 9 is compressed under stress and forms elastic restoring force acting on the handle body 2, so that the handle body 2 has the tendency of rotating away from one end of the contact support 4.

A latching spring 6 is arranged between the contact carrier 4 and the latching body 5. The contact holder 4 is provided with a spring hook 43 that is engaged with one end of the latch spring 6, and the latch body 5 is generally provided with a spring latch cylinder 52 that is inserted into the latch spring 6. Correspondingly, one end of the lock catch spring 6 close to the handle body 2 is abutted against the lock catch body 5, and the other end of the lock catch spring 6 is abutted against the spring catch hook 43 of the contact support 4, so that the lock catch spring 6 is used for driving the lock catch body 5 to rotate far away from the handle body 2. When the handle body 2 rotates towards one end of the contact support 4, namely, the handle body rotates towards the direction in which the moving contact 7 is contacted with the static contact, the handle body 2 drives the U-shaped push rod 3 to move, so that the lock catch body 5 fastens the U-shaped push rod 3 under the action of the lock catch spring 6, and the U-shaped push rod 3 pushes the contact support 4 to move.

It should be mentioned that the contact carrier 4 is provided with a connection stud 42. One end of the connecting plug 42 is inserted into the locking body 5, and the rotating connection is realized mainly by inserting one end of the connecting plug 42 into the spring buckle cylinder 52, so as to realize the rotating connection between the two. The outer housing 1 is provided with a positioning socket 12. The positioning socket 12 is provided with a long-groove-shaped adapting slot 121 for inserting the other end of the connecting plug 42, so that the rotating axis of the rotating connection between the contact support 4 and the lock catch body 5 can be further arranged in a collinear way with the rotating connection axis between the contact support 4 and the outer shell 1. It should be noted that, in order to ensure the stable rotation, one end of the connection plug 42 passing through the latch 5 may be inserted into the adapting slot 121 on the positioning socket 12 disposed on the other side of the outer housing 1 after passing through the spring buckle cylinder 52 of the latch body 5, that is, two ends of the connection plug 42 are inserted into the adapting slots 121 on the positioning sockets 12 disposed on two sides of the outer housing 1, respectively, and the following return spring 8 may be disposed only on one side of the outer housing 1, or the following main return spring 8 may be disposed on both sides of the outer housing 1.

And the positioning socket 12 is sleeved with a main return spring 8 between the contact support 4 and the outer shell 1. For stable connection of the main return spring 8, an abutment post 13 is provided on the outer housing 1. And one end of the main return spring 8 close to the handle body 2 is abutted with the contact support 4, and the other end is abutted with the abutting column 13. Therefore, when the handle body 2 rotates towards one end of the contact support 4 and drives the contact support 4 to rotate, the contact support 4 is pressed by the main return spring 8, so that the connection plug 42 on the contact support 4 rotates circumferentially in the adapting slot 121, and at this time, the main return spring 8 generates a certain torsional deformation to form an elastic restoring force capable of pushing the contact support 4 to rotate reversely in a later period. When the contact support 4 rotates and drives the contact 7 to rotate to abut against the static contact, and the handle body 2 is continuously pushed to rotate towards one end of the contact support 4, the moving contact 7 abuts against the static contact, so that the handle body 2 cannot rotate continuously, the connecting plug column 42 is enabled to move in a translation mode in the switching slot 121 along the opening direction, the reset spring 8 is further elastically deformed, and elastic restoring force capable of driving the contact support 4 to move in a reverse direction in a later stage is formed.

It should be noted that an opening is formed on the positioning socket 12 at one end of the adapting slot 121 away from the handle body 2, so that the connecting plug 42 can move in the adapting slot 121 in a translational manner, and an inclined sidewall 122 can be provided at the other end of the adapting slot 121, so that when the connecting plug 42 moves in the opening to be coaxial with the positioning socket 12, the connecting plug 42 is prevented from moving continuously. The locking body 5 is provided with a limit slot 51 for inserting one end of the U-shaped push rod 3. Meanwhile, the contact holder 4 is provided with a rotary push slot 41 which is matched with the limit slot 51 and into which one end of the U-shaped push rod 3 passing through the limit slot 51 is inserted, so as to transmit the pushing force. The rotating pushing slot 41 comprises a sliding slot 411 close to one end of the handle body 2 and a jump buckle slot 412 connected with the sliding slot 411, so that the use of parts of the miniature circuit breaker operating mechanism is effectively reduced, the probability of faults is reduced, and the purpose of improving the use reliability of the miniature circuit breaker operating mechanism is effectively achieved.

As shown in fig. 5, the miniature circuit breaker operating mechanism further comprises a bimetal structure 54, and the bimetal structure 54 is fixed on the outer shell 1 for the purpose of driving the operating mechanism to move. The latch 5 is integrally connected with a U-shaped circuit breaking driving part 53, and the circuit breaking driving part 53 is provided with a driving column 531 for matching with the bimetal structure 54 and achieving the purpose of driving the miniature circuit breaker operating mechanism to move due to the heat generation and bending of the bimetal structure 54. Therefore, this application realizes promoting this miniature circuit breaker operating device's the effect of controlling sensitivity through making lock catch body 5 and drive division 53 body coupling that opens circuit.

When the miniature circuit breaker operating mechanism is used, the U-shaped push rod 3 is driven to move through the handle body 2 so as to open the miniature circuit breaker operating mechanism, the lock catch body 5 is locked on the U-shaped push rod 3 through the lock catch spring 6, and then one end of the U-shaped push rod 3, which is inserted into the rotary push slot 41, is driven to rotate by the contact support 4, at the moment, the main return spring 8 and the handle spring 9 are stressed and compressed to form elastic restoring force, the connecting insertion column 42 on the contact support 4 rotates in the rotary push slot 121 and translates towards one end of the opening, and the main return spring 8 provides transverse supporting force for the contact support 4.

Therefore, when the miniature circuit breaker operating mechanism is switched off, the latch body 5 is reset under force, the limit slot 51 moves towards the direction separated from the U-shaped push rod 3 due to the rotation of the latch body 5, so that the handle body 2 returns to the original position under the elastic restoring force of the handle spring 9, the contact support 4 translates towards one end close to the inclined side wall 122 through the elastic restoring force of the main restoring spring 8 under the condition of losing the thrust of the U-shaped push rod 3, and simultaneously generates the rotation for separating the movable contact 7 from the fixed contact, so that the miniature circuit breaker operating mechanism provides the restoring acting force and the contact pressure through the main restoring spring 8, the connecting plug 42 inserted in the adapter slot 121 on the contact support 4 moves in the adapter slot 121 when the circuit breaker is switched off, the effect of simultaneously performing the rotation and the translation of the contact support 4 is realized, and the switching-off speed of the miniature circuit breaker operating mechanism is obviously improved, and achieve the purpose of quick cut-off and reset. The main return spring 8 may be a torsion spring, so that when the two ends move close to each other, the main return spring is twisted and deformed while being transversely bent, so as to generate a return torque and a return restoring force.

References in this application to "first," "second," "third," "fourth," etc., if any, are intended to distinguish between similar elements and not necessarily to describe a particular order or sequence. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, or apparatus.

It should be noted that the descriptions in this application referring to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides a miniature circuit breaker operating device, includes shell body (1) and fixes static contact on shell body (1), the inboard of shell body (1) is rotated and is connected with handle body (2) and contact carrier (4), contact carrier (4) are rotated and are connected with the hasp body (5), contact carrier (4) be provided with be used for with moving contact (7) that the static contact matches, handle body (2) peg graft have one end with hasp body (5) are connected and are used for the drive U type push rod (3) that moving contact (7) and static contact opened and shut, handle body (2) with be provided with handle spring (9) between shell body (1), contact carrier (4) with be provided with between the hasp body (5) hasp spring (6), its characterized in that: contact support (4) are provided with to connect and insert post (42), the one end of connecting and inserting post (42) is pegged graft in lock catch body (5), be provided with location socket (12) on shell body (1), be provided with the confession in location socket (12) connect the other end of inserting post (42) and insert and be slot-shaped switching slot (121), just location socket (12) have cup jointed and are located contact support (4) with main reset spring (8) between shell body (1).

2. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: an opening is formed in the positioning socket (12) at one end, far away from the handle body (2), of the adapting slot (121), and an inclined side wall (122) is arranged at the other end of the adapting slot (121).

3. A miniature circuit breaker operating mechanism as set forth in claim 2, wherein: the moving contact (7) is fixedly connected with the contact support (4) through a bolt.

4. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: the miniature circuit breaker operating mechanism further comprises a bimetal structure (54), the lock catch body (5) is integrally connected with a U-shaped circuit breaking driving part (53), and the circuit breaking driving part (53) is provided with a driving column (531) which is matched with the bimetal structure (54) and used for driving the miniature circuit breaker operating mechanism to move.

5. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: the lock catch body (5) is provided with a spring catch barrel (52) which is inserted into the lock catch spring (6), one end of the connecting insertion column (42) is inserted into the spring catch barrel (52), one end of the lock catch spring (6) close to the handle body (2) is abutted against the lock catch body (5), the other end of the lock catch spring (6) is abutted against the contact support (4), and the lock catch spring (6) is used for driving the lock catch body (5) to do rotating motion far away from the handle body (2).

6. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: the outer shell (1) is provided with a butt column (13), one end of the main reset spring (8) close to the handle body (2) is abutted against the contact support (4), and the other end of the main reset spring is abutted against the butt column (13).

7. The miniature circuit breaker operating mechanism of claim 6 wherein: the lock catch body (5) is provided with a limiting slot (51) for inserting one end of the U-shaped push rod (3), and the contact support (4) is provided with a rotating and pushing slot (41) which is matched with the limiting slot (51) and used for inserting one end of the lock catch body (5) and penetrates through the limiting slot (51).

8. A miniature circuit breaker operating mechanism as set forth in claim 7, wherein: the rotary push slot (41) comprises a sliding slot (411) close to one end of the handle body (2) and a jump buckle slot (412) connected with the sliding slot (411).

9. The miniature circuit breaker operating mechanism of claim 6 wherein: be provided with spring buckle on contact support (4) and collude (43), hasp spring (6) be close to the one end of handle body (2) with hasp body (5) butt, the other end with spring buckle colludes (43) butt.

10. The miniature circuit breaker operating mechanism of claim 6 wherein: the outer shell (1) is provided with a handle rotating column (11) which is inserted into the handle body (2), one end of the handle spring (9) close to the contact support (4) is abutted to the handle body (2), and the other end of the handle spring is abutted to the outer shell (1).