CN114334558B

CN114334558B - Circuit breaker

Info

Publication number: CN114334558B
Application number: CN202011066249.4A
Authority: CN
Inventors: 王洋; 李贤凯; 徐涛
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2024-06-18
Anticipated expiration: 2040-09-30
Also published as: CN116364492A; CN114334558A

Abstract

The invention provides a circuit breaker, and relates to the technical field of electrical switching devices; comprising a housing and a contact system mounted within the housing; the plug system is arranged in the shell and is connected with the contact system; two conductive ends of an external conductive structure are inserted into the plugging system, wherein one conductive end, the plugging system, the contact system and the other conductive end form a conductive loop. According to the invention, the plug-in system is additionally arranged in the circuit breaker, the external conductive structures such as the copper bars are in plug-in fit with the plug-in system, and the external conductive structures are directly inserted into the circuit breaker during assembly, so that the assembly steps are simplified, the assembly efficiency is improved, and the subsequent disassembly and maintenance are convenient.

Description

Circuit breaker

Technical Field

The invention relates to the technical field of electrical switching devices, in particular to a circuit breaker.

Background

The circuit breaker is a switching device for closing, bearing and breaking current under normal or abnormal loop conditions, the circuit breaker needs to be connected with conductive structures such as external copper bars to form a finished loop, the existing circuit breaker is connected with the copper bars by adopting screw connection, multiple parts of screw connection are required to be carried out in a complicated way, the connection mode is not beneficial to the assembly of the conductive structures such as the copper bars, and the connection with the conductive structures such as the copper bars is also not beneficial to being released when the circuit breaker needs to be disassembled for maintenance.

Disclosure of Invention

The invention aims to provide a circuit breaker so as to solve the problem that the existing circuit breaker is inconvenient to assemble and disassemble with a copper bar.

In order to solve the technical problems, the invention provides a circuit breaker, which comprises the following specific technical scheme:

A circuit breaker comprising a housing and a contact system mounted within the housing; the plug system is arranged in the shell and is connected with the contact system; two conductive ends of an external conductive structure are inserted into the plugging system, wherein one conductive end, the plugging system, the contact system and the other conductive end form a conductive loop.

Further, the plugging system comprises a driving mechanism and two clamping assemblies; the two conductive ends are inserted into the two clamping assemblies in a one-to-one correspondence manner; the clamping assembly clamps the conductive end or releases the clamping of the conductive end under the drive of the driving mechanism.

Further, the clamping assembly comprises a mounting frame, a conductive piece, a swinging piece and a clamping arm; the mounting frame is fixedly connected to the inner wall of the shell, and the conductive piece, the swinging piece and the clamping arm are all mounted on the mounting frame; the conductive piece is connected with the contact system, a clamping space is formed between the conductive piece and the clamping arm, and the conductive end is positioned in the clamping space; the driving mechanism drives the swinging piece to swing on the mounting frame, and the clamping arm clamps the conductive end or releases the clamping of the conductive end under the driving of the swinging piece.

Further, the mounting frame comprises two mounting plates which are oppositely arranged, wherein a first waist-shaped hole and a second waist-shaped hole are formed in the mounting plates, the length direction of the first waist-shaped hole and the length direction of the second waist-shaped hole are mutually angled, and the first waist-shaped hole and the second waist-shaped hole on the two mounting plates are symmetrically arranged; the swinging piece is positioned between the two mounting plates, two opposite ends of one side of the swinging piece are respectively and slidably arranged in the two first waist-shaped holes, and two opposite ends of the other side of the swinging piece are respectively and slidably arranged in the two second waist-shaped holes.

Further, the conductive member is inserted on the mounting frame and located between the two mounting plates.

Further, the mounting frame further comprises a first supporting plate and a second supporting plate; the first side of the mounting plate is provided with a first mounting hole, the second side adjacent to the first side is provided with a second mounting hole, and the length direction of the first mounting hole is perpendicular to the length direction of the second mounting hole; opposite ends of the first support plate are respectively inserted into the two first mounting holes, and opposite ends of the second support plate are respectively inserted into the two second mounting holes; the conductive piece is inserted between the first supporting plate and the second supporting plate, one side of the conductive piece is propped against the first supporting plate, and the other side of the conductive piece is propped against the second supporting plate.

Further, the length direction of the first waist-shaped hole is perpendicular to the length direction of the second waist-shaped hole.

Further, the device also comprises a spring piece, wherein the spring piece is respectively connected with the clamping arm and the mounting frame; when the clamping arms are in a clamping state, the spring piece presses the clamping arms towards the direction of the conductive piece; the clamping arm comprises a supporting end, a transmission end and a clamping end; the supporting end is positioned between the transmission end and the clamping end and hinged on the conductive piece; the driving end is in driving connection with the swinging piece and rotates around the supporting end under the driving of the swinging piece; the clamping end and the conductive piece form the clamping space and rotate around the supporting end under the drive of the transmission end so as to clamp the conductive end or release the clamping of the conductive end; the clamping arm is provided with a limiting groove between the clamping end and the supporting end, and the limiting groove is in limiting fit with the mounting frame when the clamping arm is in a clamping state.

Further, the transmission end is provided with an arc-shaped abutting surface, and the abutting surface abuts against the swinging piece.

Further, the driving mechanism comprises a linear driving part and two moving parts which are respectively connected with the linear driving part; the two moving parts are driven by the linear driving part to synchronously and linearly reciprocate, and the two moving parts are connected with the two swinging parts in a one-to-one correspondence manner.

According to the circuit breaker provided by the invention, the plug-in system is additionally arranged in the circuit breaker, the external conductive structures such as the copper bars are in plug-in fit with the plug-in system, and the external conductive structures are directly inserted into the circuit breaker during assembly, so that the assembly steps are simplified, the assembly efficiency is improved, and the subsequent disassembly and maintenance are convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic structural diagram (ii) of a circuit breaker according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a schematic diagram of a plugging system of a circuit breaker in a clamping state according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a plugging system of a circuit breaker in a non-clamping state according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a plugging system of a circuit breaker according to an embodiment of the present invention.

Icon:

1-a housing; a 2-contact system; 3-an arc extinguishing system; 4-an action mechanism; 5-a plug system; 6-a clamping assembly; 7-mounting frames; 8-conductive members; 9-swinging member; 10-clamping arms; 11-mounting plates; 12-connecting plates; 13-a first waist-shaped hole; 14-a second waist-shaped hole; 15-a first support plate; 16-a second support plate; 17-a first mounting hole; 18-a second mounting hole; 19-a support end; 20-a transmission end; 21-a clamping end; 22-abutment surface; 23-a spring piece; 24-a limit groove; 25-a linear driving part; 26-motion part.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 and 2, this embodiment provides a circuit breaker, and because the connection between the existing circuit breaker and the external conductive structures (not shown in the drawings) such as copper bars is screw connection, the problems of complex assembly and inconvenient maintenance and replacement of the subsequent disassembly machine are caused, so the internal structure of the circuit breaker is improved, and a plugging system 5 is additionally arranged in the circuit breaker.

Referring to fig. 3, the circuit breaker of the present embodiment includes a housing 1, and a contact system 2, an arc extinguishing system 3, an actuating mechanism 4, and a plug system 5 installed in the housing 1; due to the provision of the plug-in system 5, two corresponding sockets (not shown in the figures) need to be provided on the housing 1, so that two conductive ends of the external conductive structure can be plugged into the plug-in system 5 via the sockets.

The actuating mechanism 4 of the contact system 2 of the present embodiment is used for controlling the on-off of the circuit breaker, and the arc extinguishing system 3 of the present embodiment plays an arc extinguishing role, and the three are all structures known to those skilled in the art, so the working principles and structures of the contact system 2, the arc extinguishing system 3 and the actuating mechanism 4 are not described in the present embodiment.

The plugging system 5 of the embodiment is electrically connected with the contact system 2; two conductive ends of the external conductive structure such as copper bars are inserted into the plugging system 5, the two conductive ends can be called a wire inlet end and a wire outlet end, the wire inlet end and the wire outlet end are correspondingly inserted into the plugging system 5 of the embodiment through openings formed in the shell 1, and the wire inlet end, the plugging system 5, the contact system 2 and the wire outlet end of the embodiment can form a conductive loop so as to meet the working requirement of a circuit breaker.

According to the structure, the plug system 5 is additionally arranged in the circuit breaker, the external conductive structures such as the copper bars are in plug fit with the plug system 5, and the external conductive structures are directly inserted into the circuit breaker during assembly, so that the assembly steps are simplified, the assembly efficiency is improved, and the subsequent disassembly and maintenance are convenient.

The applicant of the plugging cooperation based on the copper bar finds that, for example, the plugging system 5 is designed to be a simple slot structure, which can meet the connection with the external conductive structure such as the copper bar, but the slot is easy to be worn after long-term plugging, so that the external conductive structure is loose, the service life of the circuit breaker is affected, and if the structure is intended to realize stable connection between the external conductive structure and the plugging system 5, the external conductive structure and the external conductive structure are required to be tightly matched, so that the plugging of the external conductive structure is not facilitated, therefore, the embodiment makes further improvement on the specific structural form of the plugging system 5.

Specifically, the plugging system 5 of the present embodiment includes a driving mechanism (not shown in the figure) and two clamping assemblies 6; it should be noted that, the clamping assemblies 6 of the present embodiment are not one pair in the drawings, but a plurality of pairs, that is, the number of the clamping assemblies 6 may be four or more, and for convenience of description, the present embodiment is described with a pair of clamping assemblies 6. And in order to facilitate the simultaneous actuation of the upper and lower clamping assemblies 6 in the figures, the upper and lower clamping assemblies 6 are arranged axisymmetrically in the figures. The two conductive ends are inserted into the two clamping assemblies 6 in a one-to-one correspondence manner, namely the wire inlet end is inserted into one clamping assembly 6, and the wire outlet end is also inserted into one clamping assembly 6; the clamping assembly 6 of the embodiment can act in the clamping state in fig. 4 and the non-clamping state in fig. 5 under the driving of the driving mechanism of the embodiment, and in the clamping state, the clamping assembly 6 of the embodiment clamps the conductive end to improve the connection stability of the circuit breaker and the external conductive structure and prevent the external conductive structure from loosening, and in the non-clamping state, the clamping assembly 6 of the embodiment releases the clamping of the conductive end to facilitate the pulling-out of the external conductive structure and facilitate the subsequent disassembly and maintenance.

During assembly, the clamping assembly 6 of the embodiment is driven to a non-clamping state through the driving mechanism, then the external conductive structure of the embodiment is inserted, and then the clamping assembly 6 is driven to a clamping state through the driving mechanism, so that the assembly connection with the external conductive structure is completed. When the machine is required to be disassembled for maintenance, the clamping assembly 6 of the embodiment is driven to a non-clamping state through the driving mechanism again, and the external conductive structure can be pulled out without taking effort.

As shown in fig. 6, the clamping assembly 6 of the present embodiment has various structural forms, for example, is directly implemented by an operable micromechanical clamping jaw, but because the clamping assembly 6 has a large number of clamping assemblies, the structure is complex and the cost is high, so the present embodiment proposes a new clamping assembly 6, which specifically includes a mounting frame 7, a conductive member 8, a swinging member 9 and a clamping arm 10; the mounting frame 7 of the present embodiment is used as a base structure of the clamping assembly 6, and is fixedly connected to the inner wall of the housing 1, and the conductive member 8, the swinging member 9 and the clamping arm 10 of the present embodiment are all mounted on the mounting frame 7.

The conductive member 8 of the present embodiment is electrically connected to the contact system 2, and forms a clamping space with the clamping arm 10 of the present embodiment, and the conductive end is located in the clamping space; the driving mechanism of the embodiment drives the swinging member 9 to swing on the mounting frame 7, and the clamping arm 10 swings under the driving of the swinging member 9, so that the clamping assembly 6 can be switched between a clamping state and a non-clamping state, and further clamp or release the clamping of the conductive end, and a specific action process is given after the specific structural forms of the above components are given, so as to be a preferred implementation of the embodiment.

In order to improve the installation stability and the swing stability of the swinging member 9, the structure of the installation rack 7 is improved in this embodiment, which comprises two installation plates 11 oppositely arranged, the two installation plates 11 are integrally connected through a connecting plate 12, each installation plate 11 is provided with a first waist-shaped hole 13 and a second waist-shaped hole 14, and the first waist-shaped holes 13 and the second waist-shaped holes 14 on the two installation plates 11 are symmetrically arranged. In order to enable the swinging of the swinging member 9, it is necessary that the longitudinal direction of the first waist-shaped hole 13 and the longitudinal direction of the second waist-shaped hole 14 are angled to each other and are adjacent to each other, and the length line of the second waist-shaped hole 14 located above in the drawing passes through the first waist-shaped hole 13 of the present embodiment.

The swinging member 9 of this embodiment is located between two mounting plates 11, the opposite ends of one side of the swinging member 9 are respectively slidably mounted in two first waist-shaped holes 13, the opposite ends of the other side of the swinging member 9 are respectively slidably mounted in two second waist-shaped holes 14, and one end of the swinging member 9 in the first waist-shaped holes 13 or the second waist-shaped holes 14 is driven by a driving mechanism, so that the sliding of the end of the swinging member 9 in the two waist-shaped holes can be realized, and the swinging of the swinging member 9 is further realized, so as to drive the swinging of the clamping arm 10.

Preferably, the length direction of the first waist-shaped hole 13 is perpendicular to the length direction of the second waist-shaped hole 14 in this embodiment, and the length direction of the first waist-shaped hole 13 (i.e. the horizontal direction in the drawing) is parallel to the length direction of the conductive member 8 and the insertion direction of the external conductive structure, and the driving structure drives one end of the swinging member 9 located in the first waist-shaped hole 13, which is horizontally reciprocated, and the upper end of the second waist-shaped hole 14 is vertically reciprocated.

As a preferred implementation of the present embodiment, in view of easy assembly, the present embodiment inserts the conductive member 8 on the mounting frame 7, and the conductive member 8 is also located between the two mounting plates 11, so that the assembly and subsequent replacement of the conductive member 8 can be facilitated by this structure.

Accordingly, a further improvement needs to be made on the mounting frame 7 of the present embodiment, specifically, the mounting frame 7 of the present embodiment further includes a first support plate 15 and a second support plate 16; a first side (lower side in the figure) of the mounting plates 11 is provided with a first mounting hole 17, a second side (left side in the figure) adjacent to the first side is provided with a second mounting hole 18, two first mounting holes 17 on the two mounting plates 11 are symmetrically arranged, and two second mounting holes 18 on the two mounting plates 11 are symmetrically arranged; the length direction of the first mounting hole 17 is perpendicular to the length direction of the second mounting hole 18; opposite ends of the first support plate 15 are respectively inserted into the two first mounting holes 17, and opposite ends of the second support plate 16 are respectively inserted into the two second mounting holes 18; the conductive member 8 is interposed between the first support plate 15 and the second support plate 16, the lower surface of the conductive member 8 is in contact with the first support plate 15 to support and fix the conductive member 8 by the first support plate 15, the upper surface of the conductive member 8 is abutted against the second support plate 16, and the conductive member 8 is restrained by the second support plate 16.

Based on the above-described swinging member 9, the holding arm 10 of the present embodiment includes a support end 19, a transmission end 20, and a holding end 21; the supporting end 19 is positioned between the right transmission end 20 and the left clamping end 21, and the supporting end 19 is directly arranged on the conductive piece 8 so as to support the clamping arm 10 through the conductive piece 8; the driving end 20 is in driving connection with the swinging piece 9 and rotates around the supporting end 19 under the driving of the swinging piece 9; the clamping end 21 and the conductive member 8 form a clamping space, and rotate around the supporting end 19 under the driving of the swinging member 9 to clamp the conductive end or release the clamping of the conductive end. In addition, in order to mount and fix the clamping arm 10 and also to improve the clamping force of the clamping arm 10, a spring piece 23 is connected to the mounting frame 7 of the present embodiment, and the spring piece 23 is connected to the upper side of the clamping arm 10, and can press the clamping arm 10 when the clamping arm 10 is in the clamping state, so as to improve the clamping force between the clamping arm 10 and the conductive member 8. In addition, in this embodiment, the clamping arm 10 is provided with the limiting groove 24, and when the clamping arm 10 is in the clamping state, the limiting groove 24 is in limiting fit with the second support plate 16, so as to avoid the damage to the external conductive structure caused by excessive rotation of the clamping arm 10.

Preferably, in order to facilitate the cooperation with the swinging member 9, the driving end 20 of the present embodiment is provided with an arc-shaped abutment surface 22, and the abutment surface 22 abuts against the upper end of the swinging member 9, and more preferably, the upper end of the swinging member 9 may be designed to have an arc-shaped surface structure.

In addition, in order to simplify the structure, the driving mechanism of the present embodiment includes a linear driving section 25 and two moving sections 26 connected to the linear driving section 25, respectively; the two moving parts 26 are driven by the linear driving part 25 to reciprocate synchronously and linearly, the two moving parts 26 are connected with the plurality of pairs of swinging members 9 in a one-to-one correspondence, and the linear driving part 25 of the driving mechanism of the embodiment can be any conventional linear reciprocating structure (such as a cylinder).

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A circuit breaker comprising a housing (1) and a contact system (2) mounted within the housing (1); the contact system is characterized by further comprising a plug system (5) arranged in the shell (1), wherein the plug system (5) is connected with the contact system (2);

Two conducting ends of an external conducting structure are inserted into the plugging system (5), wherein one conducting end, the plugging system (5), the contact system (2) and the other conducting end form a conducting loop;

The plug-in system (5) comprises a driving mechanism and two clamping assemblies (6); the two conductive ends are inserted into the two clamping assemblies (6) in a one-to-one correspondence manner; the clamping component (6) clamps the conductive end or releases the clamping of the conductive end under the drive of the driving mechanism;

the clamping assembly (6) comprises a mounting frame (7), a conductive piece (8), a swinging piece (9) and a clamping arm (10); the mounting frame (7) is fixedly connected to the inner wall of the shell (1), and the conducting piece (8), the swinging piece (9) and the clamping arm (10) are all mounted on the mounting frame (7); the conductive piece (8) is connected with the contact system (2) and forms a clamping space with the clamping arm (10), and the conductive end is positioned in the clamping space; the driving mechanism drives the swinging piece (9) to swing on the mounting frame (7), and the clamping arm (10) clamps the conductive end or releases the clamping of the conductive end under the driving of the swinging piece (9).

2. The circuit breaker according to claim 1, characterized in that the mounting frame (7) comprises two mounting plates (11) which are oppositely arranged, the mounting plates (11) are provided with a first waist-shaped hole (13) and a second waist-shaped hole (14), the length direction of the first waist-shaped hole (13) and the length direction of the second waist-shaped hole (14) are mutually angled, and the first waist-shaped hole (13) and the second waist-shaped hole (14) on the two mounting plates (11) are symmetrically arranged;

the swinging piece (9) is located between the two mounting plates (11), two opposite ends of one side of the swinging piece (9) are respectively and slidably mounted in the two first waist-shaped holes (13), and two opposite ends of the other side of the swinging piece (9) are respectively and slidably mounted in the two second waist-shaped holes (14).

3. Circuit breaker according to claim 2, characterized in that the conductive element (8) is interposed on the mounting frame (7) and is located between the two mounting plates (11).

4. A circuit breaker according to claim 3, characterized in that the mounting frame (7) further comprises a first support plate (15) and a second support plate (16);

A first mounting hole (17) is formed in the first side of the mounting plate (11), a second mounting hole (18) is formed in the second side adjacent to the first side, and the length direction of the first mounting hole (17) is perpendicular to the length direction of the second mounting hole (18);

Opposite ends of the first supporting plate (15) are respectively inserted into the two first mounting holes (17), and opposite ends of the second supporting plate (16) are respectively inserted into the two second mounting holes (18);

The conductive piece (8) is inserted between the first supporting plate (15) and the second supporting plate (16), one side of the conductive piece (8) is propped against the first supporting plate (15), and the other side of the conductive piece is propped against the second supporting plate (16).

5. Circuit breaker according to claim 2, characterized in that the length direction of the first kidney-shaped aperture (13) is perpendicular to the length direction of the second kidney-shaped aperture (14).

6. Circuit breaker according to claim 1, further comprising a spring plate (23), said spring plate (23) being connected to said clamping arm (10) and to said mounting bracket (7), respectively; when the clamping arm (10) is in a clamping state, the spring piece (23) presses the clamping arm (10) towards the conductive piece (8);

The clamping arm (10) comprises a supporting plate (19), a transmission end (20) and a clamping end (21); the supporting plate (19) is positioned between the transmission end (20) and the clamping end (21) and is arranged on the conductive piece (8); the transmission end (20) is in transmission connection with the swinging piece (9) and rotates around the supporting plate (19) under the drive of the swinging piece (9); the clamping end (21) and the conductive piece (8) form the clamping space and rotate around the supporting plate (19) under the drive of the transmission end (20) so as to clamp the conductive end or release the clamping of the conductive end;

The clamping arm (10) is provided with a limiting groove (24) between the clamping end (21) and the supporting plate (19), and when the clamping arm (10) is in a clamping state, the limiting groove (24) is in limiting fit with the mounting frame (7).

7. Circuit breaker according to claim 6, characterized in that the driving end (20) is provided with an arc-shaped abutment surface (22), which abutment surface (22) abuts against the oscillating piece (9).

8. Circuit breaker according to claim 1, characterized in that the drive mechanism comprises a linear drive (25) and two moving parts (26) connected to the linear drive (25), respectively;

The two moving parts (26) are driven by the linear driving part (25) to synchronously and linearly reciprocate, and the two moving parts (26) are connected with the two swinging pieces (9) in a one-to-one correspondence manner.