Conductive system assembly of circuit breaker

Abstract

The utility model relates to a conductive system assembly of a circuit breaker. The technical problem to be solved by the utility model is to provide a circuit breaker conductive system assembly which is compact in structure and tight in connection. According to the technical scheme, the electromagnetic tripping device comprises an external connection plate, a thermal element, a bimetallic strip, a flexible connection, a moving contact, an electromagnetic trip, an electromagnetic trip fixing seat and a main fixing plate, and the external connection plate comprises an external connection plate wiring part, an external connection plate transition part, an external connection part first side part, an external connection part arc part and an external connection part butt joint part which are sequentially bent and formed. The thermal element comprises a thermal element main body, and the side part of the upper end of the thermal element main body is vertically bent to form a thermal element butt joint part; the electromagnetic tripping fixing seat comprises a fixing seat main body. The utility model has the advantages that the external connection plate is integrally designed, so that the electromagnetic tripping and conductive system is reasonable in layout, the structure is more compact, and the number of electric welding times is small; and multiple positioning and limiting structures are arranged among the components, so that the product is firm and tight in connection and high in impact resistance.

Description

Technical Field

[0001] The utility model relates to a circuit breaker conductive system component. Background Art

[0002] Circuit breakers are important protective devices in low-voltage power distribution systems, providing short-circuit protection, overload protection, undervoltage protection and other functions for AC power grid lines and electrical equipment. The circuit breaker conductive system generally includes bimetallic strips, thermal elements, moving contacts, external boards, flexible connections and fixed boards. The existing circuit breaker conductive systems still have the following problems: 1. There are few positioning and limiting structures between components, resulting in poor linkage and poor resistance when subjected to external vibration or impact, which easily leads to displacement and poor contact, poor conductivity and poor reliability of operation; 2. The electromagnetic release is set separately from the conductive system, which makes the overall size of the circuit breaker large, the layout unreasonable, the parts numerous, and the assembly troublesome. In view of the above two problems, the existing circuit breaker conductive system is improved and optimized. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a circuit breaker conductive system component with compact structure and tight connection.

[0004] The technical solution adopted by the conductive system component of the circuit breaker of the utility model: includes an external connection plate, a thermal element, a bimetallic strip, a flexible connection, a moving contact, an electromagnetic release, an electromagnetic release fixing seat and a main fixing plate, characterized in that the external connection plate includes an external connection plate wiring portion, an external connection plate transition portion, a first side portion of the external connection portion, an arc portion of the external connection portion and an external connection portion docking portion arranged parallel to the first side portion of the external connection portion, which are bent in sequence; the thermal element includes a thermal element body, and the upper end side portion of the thermal element body is vertically bent to form a thermal element docking portion welded to the external connection portion docking portion;

[0005] The electromagnetic trip fixing seat includes a fixing seat body, the fixing seat body is provided with a fixing seat opening for inserting the electromagnetic trip, the arc portion of the external connection portion is sleeved outside the electromagnetic trip, the main fixing plate includes a fixing plate mounting portion fixed below the fixing seat body, the fixing plate mounting portion is vertically bent to form a fixing plate docking portion that is in contact with the bimetallic strip, and the fixing plate docking portion, the lower portion of the bimetallic strip, and the lower portion of the thermal element are riveted together in sequence.

[0006] The electromagnetic release includes a release rubber seat and a moving iron core, a rubber seat positioning boss is provided at the upper end of the release rubber seat, the fixed seat main body includes a fixed seat lower plate, left and right side plates of the fixed seat and a fixed seat upper plate, a fixed seat connecting frame is provided at the front end of the left and right side plates of the fixed seat, an upper plate positioning hole corresponding to the rubber seat positioning boss is provided on the fixed seat upper plate, and a lower plate limiting block is provided on the fixed plate docking portion.

[0007] The center of the external board wiring portion and the center of the electromagnetic tripping are located in the same plane.

[0008] A fixing plate limiting protrusion is provided on the fixing plate docking portion, and a thermal element limiting groove corresponding to the fixing plate limiting protrusion is provided at the lower portion of the thermal element main body.

[0009] The lower plate of the fixing seat is provided with a lower plate docking hole, and the fixing plate mounting portion is provided with a waist-shaped adjustment hole corresponding to the lower plate docking hole.

[0010] An external connection part positioning protrusion is arranged on the external connection part docking part, and a thermal element positioning recess corresponding to the external connection part positioning protrusion is arranged on the thermal element docking part.

[0011] The electromagnetic release fixing seat also includes a reinforcement frame placed in the fixing seat opening, and the reinforcement frame is provided with a reinforcement frame limiting hole for the release rubber seat sleeve.

[0012] The advantages of the conductive system component of the circuit breaker of the utility model are: the integrated design of the external plate makes the layout of the electromagnetic release and the conductive system reasonable, the structure is more compact, the number of electric welding is reduced, and the accuracy of the conductive system is improved; there are multiple positioning and limiting structures between the components, the product connection is firm and tight, the impact resistance is strong, the problem of displacement and poor contact is not easy to occur, and the operation is more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a structural schematic diagram of the conductive system components of the circuit breaker of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the external board of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the thermal element of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the electromagnetic release fixing seat of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the main body of the fixing seat of the utility model;

[0019] Figure 6 It is a structural schematic diagram of the main fixing plate of the utility model;

[0020] Figure 7 It is a schematic diagram of the structure of the electromagnetic tripping of the utility model;

[0021] Figure 8It is a structural schematic diagram of the reinforcement frame of the utility model. DETAILED DESCRIPTION

[0022] like Figure 1-8 As shown, the circuit breaker conductive system component involved in the utility model includes an external plate 1, a thermal element 2, a bimetallic strip 3, a flexible connection 4, a moving contact 5, an electromagnetic release 6, an electromagnetic release fixing seat 7 and a main fixing plate 8, wherein the external plate 1 includes an external plate wiring portion 10, an external plate transition portion 11, a first side portion 12 of the external portion, an arc portion 13 of the external portion and an external portion docking portion 14 arranged parallel to the first side portion 12 of the external portion, which are bent in sequence, and the thermal element 2 includes a thermal element main body 17, and the upper end side portion of the thermal element main body 17 is vertically bent to form a thermal element docking portion 18 welded to the external portion docking portion 14; the electromagnetic release fixing seat 7 includes a fixing seat main body 20, and the fixing seat main body 21 is provided with a plurality of metal strips 30, 31 and 32, respectively. The seat body 20 is provided with a fixed seat opening 26 for inserting the electromagnetic release 6, the arc portion 13 of the external connection portion is sleeved outside the electromagnetic release 6, and the main fixed plate 8 includes a fixed plate mounting portion 29 fixed below the fixed seat body 20, and the fixed plate mounting portion 29 is vertically bent to form a fixed plate docking portion 30 that fits the bimetallic strip 3, and the fixed plate docking portion 30, the lower portion of the bimetallic strip 3, and the lower portion of the thermal element 2 are riveted together in sequence. The integrated design of the external plate 1 makes the layout of the electromagnetic release and the conductive system reasonable and the structure more compact. The original three electric weldings are simplified to one electric welding, which improves the accuracy of the conductive system, makes the structure more stable, and improves the conductive performance.

[0023] The electromagnetic release 6 includes a release rubber seat 32 and a moving iron core 33. The upper end of the release rubber seat 32 is provided with a rubber seat positioning boss 34. The fixed seat body 20 includes a fixed seat lower plate 23, a fixed seat left and right side plates 24 and a fixed seat upper plate 25. The front ends of the fixed seat left and right side plates 24 are provided with a fixed seat connecting frame 36. The fixed seat upper plate 25 is provided with an upper plate positioning hole 37 corresponding to the rubber seat positioning boss 34. The fixed seat lower plate 23 is provided with a lower plate limiting block 27 that abuts against the fixed plate docking portion 30. The lower plate limiting block 27 limits the fixed plate, has strong impact resistance, and is not prone to displacement and poor contact.

[0024] The center of the external board wiring part 10 and the center of the electromagnetic release 6 are in the same plane, the structure is stable, and the power flow is balanced.

[0025] The fixing plate docking portion 30 is provided with a fixing plate limiting protrusion 38, and the lower part of the thermal element body 17 is provided with a thermal element limiting groove 39 corresponding to the fixing plate limiting protrusion 38, which has multiple limiting functions, and the connection is more firm and tight, and the contact is good.

[0026] The fixing seat lower plate 23 is provided with a lower plate docking hole 40, and the fixing plate mounting portion 29 is provided with a waist-shaped adjustment hole 41 corresponding to the lower plate docking hole 40, so as to facilitate position adjustment and be flexible in use.

[0027] The external connection part docking part 14 is provided with an external connection part positioning protrusion 16, and the thermal element docking part 18 is provided with a thermal element positioning recess 19 corresponding to the external connection part positioning protrusion 16, with multiple limit positions, the connection is more firm and tight, and the contact is good.

[0028] The electromagnetic release fixing seat 7 also includes a reinforcement frame 21 placed in the fixing seat opening 26. The reinforcement frame 21 is provided with a reinforcement frame limiting hole 44 for the release rubber seat 32 to be sleeved. It has multiple limiting functions, and the connection is more firm and tight, and the contact is good.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A circuit breaker conductive system assembly, comprising an external board (1), a thermal element (2), a bimetallic strip (3), a flexible connection (4), a moving contact (5), an electromagnetic release (6), an electromagnetic release fixing seat (7) and a main fixing plate (8), characterized in that: The external connection plate (1) comprises an external connection plate connection portion (10), an external connection plate transition portion (11), an external connection portion first side portion (12), an external connection portion arc portion (13), and an external connection portion docking portion (14) arranged parallel to the external connection portion first side portion (12), and the thermal element (2) comprises a thermal element body (17), and the upper end side portion of the thermal element body (17) is vertically bent to form a thermal element docking portion (18) welded to the external connection portion docking portion (14); The electromagnetic release fixing seat (7) comprises a fixing seat body (20), the fixing seat body (20) is provided with a fixing seat opening (26) for inserting the electromagnetic release (6), the external arc portion (13) is sleeved outside the electromagnetic release (6), the main fixing plate (8) comprises a fixing plate mounting portion (29) fixed below the fixing seat body (20), the fixing plate mounting portion (29) is vertically bent to form a fixing plate docking portion (30) that is in contact with the bimetallic strip (3), and the fixing plate docking portion (30), the lower portion of the bimetallic strip (3), and the lower portion of the thermal element (2) are riveted together in sequence.

2. The circuit breaker conductive system assembly according to claim 1, characterized in that: The electromagnetic release (6) comprises a release rubber seat (32) and a moving iron core (33); a rubber seat positioning boss (34) is provided at the upper end of the release rubber seat (32); the fixed seat body (20) comprises a fixed seat lower plate (23), a fixed seat left and right side plates (24) and a fixed seat upper plate (25); a fixed seat connecting frame (36) is provided at the front ends of the fixed seat left and right side plates (24); an upper plate positioning hole (37) corresponding to the rubber seat positioning boss (34) is provided on the fixed seat upper plate (25); and a lower plate limiting block (27) abutting against the fixed plate docking portion (30) is provided on the fixed seat lower plate (23).

3. The circuit breaker conductive system assembly according to claim 1, characterized in that: The center of the external board wiring portion (10) and the center of the electromagnetic release (6) are located in the same plane.

4. The circuit breaker conductive system assembly according to claim 1, characterized in that: The fixing plate butting portion (30) is provided with a fixing plate limiting protrusion (38), and the lower portion of the thermal element body (17) is provided with a thermal element limiting groove (39) corresponding to the fixing plate limiting protrusion (38).

5. The circuit breaker conductive system assembly according to claim 2, characterized in that: The fixing seat lower plate (23) is provided with a lower plate docking hole (40), and the fixing plate mounting portion (29) is provided with a waist-shaped adjustment hole (41) corresponding to the lower plate docking hole (40).

6. The circuit breaker conductive system assembly according to claim 1, characterized in that: An external connection part positioning protrusion (16) is provided on the external connection part docking part (14), and a thermal element positioning recess (19) corresponding to the external connection part positioning protrusion (16) is provided on the thermal element docking part (18).

7. The circuit breaker conductive system assembly according to claim 2, characterized in that: The electromagnetic tripping fixing seat (7) further comprises a reinforcement frame (21) disposed in the fixing seat opening (26), the reinforcement frame (21) being provided with a reinforcement frame limiting hole (44) for sleeve-mounting the tripping rubber seat (32).

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