CN212257320U

CN212257320U - Tripping system of circuit breaker and circuit breaker

Info

Publication number: CN212257320U
Application number: CN202021336328.8U
Authority: CN
Inventors: 贺棉怀; 刘凯; 赵雄
Original assignee: Garcia Electrical Appliance Co ltd
Current assignee: Garcia Electrical Appliance Co ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2020-12-29
Anticipated expiration: 2030-07-09

Abstract

A tripping system of a circuit breaker and a circuit breaker are provided. The method is characterized in that: the locking bolt penetrates through the shell and the wiring board in sequence and then is in threaded connection with the iron core, and the shell, the wiring board and the iron core are fixedly connected into a whole. The magnetic gap fixing device has the advantages that the iron core, the wiring board and the shell are connected into a whole, the influence of the actions of the double gold sheets is avoided, the magnetic gap is ensured to be kept fixed, the assembly is convenient, the structure is stable and reliable, and the reliability of electromagnetic tripping during short circuit is ensured.

Description

Tripping system of circuit breaker and circuit breaker

Technical Field

The utility model relates to a switch field, concretely relates to tripping system and a circuit breaker of circuit breaker.

Background

The plug-in circuit breaker is through inserting the base of connection on electric circuit to insert electric circuit and realize the control to electric circuit, can directly extract when the plug-in circuit breaker damages, insert good circuit breaker again can, it is more convenient not only to load and unload, can change the circuit breaker under the circumstances that the generating line does not cut off the power supply in addition, and specially adapted is not allowed the workplace of cutting off the power supply at will to some.

As shown in fig. 6, in a conventional plug-in circuit breaker on the market, a trip system of the plug-in circuit breaker generally includes a thermal trip portion for overload protection and an electromagnetic trip portion for short circuit protection, wherein an iron core 04 of the plug-in circuit breaker is fixedly connected to a bimetal 03, so that the iron core 04 is driven by the bimetal 03 to synchronously operate, and the iron core 04 is driven by the bimetal 03 to synchronously adjust, thereby easily affecting the reliability of short circuit instantaneous trip protection and having a smaller application range.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of background art, the utility model provides a tripping system and a circuit breaker of circuit breaker.

The utility model discloses the technical scheme who adopts: a tripping system of a circuit breaker comprises a shell, a wiring board, a bimetallic strip and an iron core, wherein the wiring board, the bimetallic strip and the iron core are arranged in the shell; one end of the double-gold piece is fixedly connected with the end part of the wiring board; the locking bolt penetrates through the shell and the wiring board in sequence and then is in threaded connection with the iron core, and the shell, the wiring board and the iron core are fixedly connected into a whole.

The adjusting bolt is in threaded fit with the shell, and the end part of the adjusting bolt corresponds to one end, connected with the bimetallic strip, of the wiring board.

Still include armature support, armature, elasticity piece that resets, iron core both sides limit extends there is the connection lateral wall, armature support with be connected lateral wall swivelling joint, armature fixed mounting is on armature support to corresponding with the iron core, elasticity piece that resets is used for keeping armature and iron core phase separation.

And the armature bracket is provided with a hook part correspondingly matched with the lock catch.

The elastic reset piece is a spring, and two ends of the elastic reset piece are respectively abutted against the upper ends of the shell and the armature bracket.

A circuit breaker, characterized by: the tripping device comprises a shell, wherein an operating mechanism, a moving contact, a static contact, an arc extinguish chamber, a wiring terminal, a pin and the tripping system are arranged in the shell.

The operating mechanism comprises a handle, a jump buckle and a lock catch, wherein the lock catch is arranged on one side of the tripping system and is L-shaped, the end part of the side edge of the lock catch is hinged with the shell, the bottom edge of the lock catch is positioned below the tripping system, and the end part of the lock catch is bent upwards to correspond to the bimetallic strip.

The buckle is provided with a clamping groove capable of forming buckle matching with the jump buckle, a contact piece with a smooth surface is arranged on the partial surface of the buckle contacting with the jump buckle, and the contact piece extends into the clamping groove and can be in limit matching with the jump buckle.

And a multi-pole linkage rod is further arranged between the jump buckle and the lock catch and is hinged with the shell.

The utility model has the advantages that: the iron core, the wiring board and the shell are connected into a whole, the influence of the actions of the double gold sheets is avoided, the magnetic gap is ensured to be kept fixed, the assembly is convenient, the structure is stable and reliable, and the reliability of electromagnetic tripping during short circuit is ensured.

Drawings

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

Fig. 2 is an enlarged schematic view of a point a in fig. 1.

Fig. 3 is a schematic structural diagram of an iron core according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an armature bracket according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of a lock according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a conventional plug-in type circuit breaker.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1, a plug-in circuit breaker includes a housing 1, and an operating mechanism 10, a movable contact 11, a stationary contact 12, an arc extinguish chamber 13, a connection terminal 14, a pin 15, and a trip system are disposed in the housing 1.

The operating mechanism 10 comprises a handle 101, a trip buckle 102 and a lock catch 103, wherein the handle 101, the trip buckle 102 and the lock catch 103 are hinged and matched with the shell 1, the handle 101 is in linkage and matching with the trip buckle 102, the trip buckle 102 and the lock catch 103 are buckled when the switch is switched on, and the handle 101 and the lock catch 103 are connected with a torsion spring which is used for driving the reset of the trip buckle when the trip and the switch are switched off.

The moving contact 11 is connected with the handle 101 in a linkage mode, the fixed contact 12 is of a pin structure, the lower end of the fixed contact penetrates out of the shell 1, a pin 15 is further arranged below the shell 1 and fixes the circuit breaker together with the fixed contact 12 in an inserting mode, the moving contact 11 and the fixed contact 12 can be driven to be connected or disconnected by the action of the handle 101 to achieve connection and disconnection, the arc extinguish chamber 13 is arranged between the fixed contact 12 and the moving contact 11, when the moving contact 11 and the fixed contact 12 are separated and disconnected, electric arcs generated by the electric arcs can rapidly enter the arc extinguish chamber to be extinguished, and the wiring terminal 14 is only arranged on the.

As shown in fig. 2-5, the tripping system comprises a terminal board 2, a bimetallic strip 3, an iron core 4, a locking bolt 5, an adjusting bolt, an armature bracket 7, an armature 8 and an elastic resetting piece 9.

Binding post 14 is connected to 2 one ends of wiring board, and the tip of two gold sheets is connected to the other end, iron core 4 is connected to the position that wiring board 2 is close to the middle part, locking bolt 5 passes casing 1, wiring board 2 back and iron core 4 threaded connection in proper order, and with casing 1, wiring board 2, iron core 4 fixed connection become an organic whole for iron core 4 does not receive the influence of two gold sheets actions, and not only the equipment is convenient, and stable in structure is reliable moreover, guarantees the reliability of electromagnetic trip during the short circuit.

Adjusting bolt 6 and the nut screw-thread fit who fixes in casing 1, its tip is corresponding with the one end that connection bimetallic strip 3 of wiring board 2, can promote the tip action of wiring board 2 and bimetallic strip 3 through adjusting bolt 6, realizes bimetallic strip 3's position adjustment, because wiring board 2 middle part position is pressed from both sides tightly fixedly by casing 1 and iron core 4, not only makes things convenient for bimetallic strip adjustment, moreover at bimetallic strip 3 adjustment in-process, can not drive iron core 4 action.

The iron core 4 both sides limit is extended there is connecting side wall 41, armature support 7 middle part is extended there is the axle, with connecting side wall 41 swivelling joint, armature 8 is installed to armature support 7 lower part to corresponding with iron core 4, armature support 7 upper portion and elasticity reset 9 cooperate, elasticity reset 9 is the spring, and its both ends respectively with casing 1, armature support 7's upper end inconsistent for keep armature 8 and iron core 4 phase separation.

The lock catch 103 is of an L-shaped structure and is arranged on one side of the tripping system, the end part of the side edge of the lock catch 103 is hinged with the shell 1, the armature bracket 7 is provided with a pull hook part 71 correspondingly matched with the side edge of the lock catch, the bottom edge of the lock catch 103 is positioned below the tripping system, and the end part of the lock catch is bent upwards to correspond to the bimetallic strip 3.

The tripping system can realize overload protection and short-circuit protection, when the overload problem occurs, the bimetallic strip 3 can be subjected to thermal deformation action, so that the lock catch 103 is driven to act to realize tripping, when the short-circuit problem occurs, the iron core 4 generates electromagnetic suction to attract the armature 8, so that the armature support 7 is driven to act, and the armature support 7 drives the lock catch 103 to act through the hook part 71 to realize tripping.

By adopting the scheme, the overload protection part and the short-circuit protection part are structurally designed together, the structure is compact, the mutual influence is avoided, the magnetic gap is ensured to be kept fixed, the action is ensured to be stable and reliable, the adjustment is convenient, and the application range is wider.

In addition, a multi-pole linkage rod 105 is further arranged between the jump buckle 102 and the lock catch 103, the multi-pole linkage rod 105 is hinged with the shell 1, and a linkage part correspondingly matched with the multi-pole linkage rod 105 is arranged on the jump buckle 102.

The multi-pole linkage rod 105 is provided with a linkage hole along the hinged center, mutual linkage action is realized when a plurality of circuit breakers are subjected to multi-pole splicing, when one group of circuit breakers are tripped, the trip buckle is tripped to drive the corresponding multi-pole linkage rod to act, all multi-stage linkage rods are driven to act synchronously, and the multi-stage linkage rod pushes the lock buckle to realize unlocking and tripping.

In addition, a contact piece 104 with a smooth surface is arranged at the contact part of the lock catch 103 and the jump buckle 102, the contact piece 104 is made of a stainless steel sheet and is welded with the lock catch 103, friction when the jump buckle 102 is in contact with the lock catch 103 is reduced, tripping action is more reliable, meanwhile, the contact piece 104 extends into the clamping groove and forms limit fit with the end part of the jump buckle 102, the jump buckle 102 is limited, the problem that the end part of the jump buckle extends too deep to cause tripping is avoided, tripping performance is further improved, and action is more stable and reliable.

In addition, the above trip system is not limited to the plug-in type circuit breaker, but can be applied to a small-sized circuit breaker of a similar structure.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. A tripping system of a circuit breaker comprises a shell (1), and a wiring board (2), a bimetallic strip (3) and an iron core (4) which are arranged in the shell (1); one end of the double-gold piece (3) is fixedly connected with the end part of the wiring board (2); the method is characterized in that: the iron core fixing structure is characterized by further comprising a locking bolt (5), wherein the locking bolt (5) penetrates through the shell (1) and the wiring board (2) in sequence and then is in threaded connection with the iron core (4), and the shell (1), the wiring board (2) and the iron core (4) are fixedly connected into a whole.

2. The trip system of a circuit breaker of claim 1, wherein: the connecting device is characterized by further comprising an adjusting bolt (6), wherein the adjusting bolt (6) is in threaded fit with the shell (1), and the end part of the adjusting bolt corresponds to one end, connected with the double-gold-piece (3), of the wiring board (2).

3. The trip system of a circuit breaker of claim 1, wherein: still include armature support (7), armature (8), elasticity piece (9) that resets, iron core (4) both sides limit is extended there is connection lateral wall (41), armature support (7) with be connected lateral wall (41) rotatable coupling, armature (8) fixed mounting is on armature support (7) to corresponding with iron core (4), elasticity piece (9) that resets is used for keeping armature (8) and iron core (4) phase separation.

4. A trip system for a circuit breaker as claimed in claim 3, wherein: and a hook pulling part (71) correspondingly matched with the lock catch is arranged on the armature bracket (7).

5. A trip system for a circuit breaker as claimed in claim 3, wherein: the elastic reset piece (9) is a spring, and two ends of the elastic reset piece are respectively abutted against the upper ends of the shell (1) and the armature bracket (7).

6. A circuit breaker, characterized by: the tripping device comprises a shell (1), wherein an operating mechanism (10), a movable contact (11), a fixed contact (12), an arc extinguish chamber (13), a connecting terminal (14) and the tripping system of any one of claims 1 to 5 are arranged in the shell (1).

7. A circuit breaker according to claim 6, wherein: the operating mechanism (10) comprises a handle (101), a jump buckle (102) and a lock catch (103), wherein the lock catch (103) is arranged on one side of the tripping system, the lock catch (103) is L-shaped, the end part of the side edge of the lock catch (103) is hinged with the shell (1), the bottom edge of the lock catch (103) is positioned below the tripping system, and the end part of the lock catch (103) is bent upwards to correspond to the bimetallic strip (3).

8. A circuit breaker according to claim 7, wherein: the buckle (103) is provided with a clamping groove capable of forming a buckling fit with the jump buckle (102), a contact piece (104) with a smooth surface is arranged on the partial surface of the buckle (103) contacted with the jump buckle (102), and the contact piece (104) extends into the clamping groove and can be in limit fit with the jump buckle (102).

9. A circuit breaker according to claim 7, wherein: a multi-pole linkage rod (105) is further arranged between the jump buckle (102) and the lock catch (103), and the multi-pole linkage rod (105) is hinged with the shell (1).