CN219370940U - Circuit breaker connection structure and circuit breaker - Google Patents

Abstract

The application relates to a circuit breaker connecting structure and the circuit breaker, comprising a bridge type contact, a bus and a slotting tool; the bridge type contact is vertically arranged between the bus and the slotting tool; the bus comprises an inserting part and an external part, the inserting part and the external part are integrally connected and are respectively positioned inside and outside the drawer seat, the external part is used for connecting an external wire, and the inserting part is clamped with one end of the bridge-type contact; the slotting tool comprises a plug part and a connecting part, wherein the connecting part is used for connecting the breaker body, and the plug part is clamped with the other end of the bridge-type contact. Above-mentioned circuit breaker and connection structure through grafting portion and the external portion of integration generating line, has effectively solved the too big problem of contact resistance that many times switching led to in the traditional connected mode, and the heat of production is also still less. Through arranging bridge type contact perpendicularly, the distance between the bridge type contacts of horizontal direction has been enlarged, has avoided the heat stack that the heat generating source is too near each other to lead to, and outside level is then more favorable to the wiring of product.

Description

Circuit breaker connection structure and circuit breaker

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to a circuit breaker connecting structure and the circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and breaking current under normal or abnormal loop conditions, while the circuit breaker is also the most important power distribution equipment in a low voltage power distribution system.

Taking a universal circuit breaker as an example, the universal circuit breaker is generally divided into a fixed type circuit breaker and a drawer type circuit breaker according to an installation mode, wherein the drawer type circuit breaker is relatively wide in application due to high safety and convenient maintenance.

But drawer type circuit breaker also sacrifices a part of performance when maintaining the convenience, specifically for drawer type circuit breaker compares in fixed circuit breaker needs to carry out the secondary switching, and the slotting tool of body needs to peg graft in the one end of bridge type contact, and the external generating line of another part needs to peg graft in the other end of bridge type contact, has area of contact to be little, and contact resistance is too high problem, and the body is comparatively difficult owing to the blockking of drawer seat structure, and consequently, drawer type circuit breaker's temperature rise is generally higher than fixed circuit breaker, leads to its use scene limited.

Disclosure of Invention

In view of the above, it is necessary to provide a circuit breaker connection structure and a circuit breaker capable of reducing the problem of excessive contact resistance caused by multiple switching.

A circuit breaker connection structure, applied to a drawer type circuit breaker, comprising:

the bridge-type contact is vertically arranged between the bus and the slotting tool;

the bus comprises an inserting part and an external part, the inserting part and the external part are integrally connected and are respectively positioned inside and outside the drawer seat, the external part is used for connecting an external wire, and the inserting part is clamped with one end of the bridge-type contact;

the plug blade comprises a plug part and a connecting part, wherein the connecting part is used for connecting the breaker body, and the plug part is clamped with the other end of the bridge-type contact.

In one embodiment, the two sides of the bus bar are fixed with angle plates, and the angle plates are fixed on the drawer base.

In one embodiment, the plug part and/or one end of the plug part, which is clamped with the bridge contact, is longitudinally provided with a heat dissipation hole penetrating through the top surface and the bottom surface of the plug part or two opposite side surfaces of the plug part and/or the bridge contact.

In one embodiment, the plug part and/or the end face of the end, clamped with the bridge contact, of the plug part is provided with a heat dissipation groove penetrating through the top surface and the bottom surface of the plug part or the two opposite side surfaces of the plug part and the bridge contact.

In one embodiment, the heat dissipation holes are multiple, and the multiple heat dissipation holes are arranged at intervals along the installation direction of the plug part or the plug part.

In one embodiment, the heat dissipation hole penetrates through to one end of the plug part or the plug part, which is oriented towards the bridge-type contact, towards one side of the bridge-type contact.

In one embodiment, a triangular groove with an opening facing the bridge-type contact is formed in one side of the heat dissipation hole, which faces away from the bridge-type contact, and an angular bisector of the triangular groove faces the bridge-type contact.

In one embodiment, at least one side of one end of the plugging part, which is clamped with the bridge-type contact, is provided with a protruding part, and the protruding part is clamped inside the bridge-type contact.

In one embodiment, a chamfer is arranged at one end corner of the plug part, which is clamped with the bridge-type contact.

A circuit breaker comprising a drawer housing, a circuit breaker body mounted within the drawer housing, and a circuit breaker connection structure as claimed in any one of the preceding claims.

Above-mentioned circuit breaker and connection structure through grafting portion and the external portion of integration generating line, cancels its traditional connected mode of passing through fastener and connects this kind and change integrative switching, has effectively solved the too big problem of contact resistance that many times switching led to among the traditional connected mode, and the heat of production is also less. Through arranging bridge type contact perpendicularly, the interval of horizontal direction bridge type contact has been enlarged, has avoided the heat stack that the source of generating heat leads to too closely each other, more is favorable to the heat dissipation, and outside keep the wiring of level then more favorable to the product.

Drawings

FIG. 1 is a schematic diagram of a connection structure installation scenario of one embodiment;

FIG. 2 is a schematic diagram of a connection structure of an embodiment;

FIG. 3 is a schematic view of the bus bar structure of the first embodiment;

FIG. 4 is a schematic view of a first embodiment of a slotting tool;

FIG. 5 is a schematic view of a bus bar structure of a second embodiment;

fig. 6 is a schematic view of a slotting tool according to a second embodiment.

In the figure: 10. a drawer seat; 100. a bus; 110. a plug-in part; 111. a protruding portion; 120. an external connection part; 200. a slotting tool; 210. a plug part; 211. chamfering; 220. a connection part; 300. bridge type contact; 400. a corner plate; 500. a heat radiation hole; 600. triangular grooves.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, in one embodiment, a circuit breaker connection structure, applied to a drawer type circuit breaker, includes a bridge contact 300, a bus bar 100, and a blade 200; the bridge contact 300 is vertically disposed between the busbar 100 and the blade 200; the bus 100 comprises an inserting part 110 and an external part 120, which are connected in an integral way and respectively positioned in the drawer seat 10 and outside, the external part 120 is used for connecting an external wire, and the inserting part 110 is clamped with one end of the bridge contact 300; the plug blade 200 includes a plug portion 210 and a connection portion 220, the connection portion 220 is used for connecting the breaker body, and the plug portion 210 is engaged with the other end of the bridge contact 300.

Specifically, the integrally connected plug-in portion 110 and the external portion 120 are installed at the back plate of the drawer seat 10 during use, and the plug-in portion 110 is located inside the drawer seat 10, and the external portion 120 is located outside the drawer seat 10. Then, one end of the bridge type contact 300 is clamped on the plug-in portion 110, and the bridge type contact 300 is fixed at the same time, and finally, the plug-in portion 210 is installed between the moving contact and the fixed contact of the breaker body, and when the breaker body is rocked into the drawer base 10, the plug-in portion 210 is clamped to the other end of the bridge type contact 300, so that connection of the breaker body is completed.

According to the circuit breaker connecting structure, through integrating the plug-in part 110 and the external part 120 of the bus 100, the traditional connecting mode of connecting the plug-in part and the external part through fasteners is canceled to be changed into integral switching, so that the problem of overlarge contact resistance caused by multiple switching in the traditional connecting mode is effectively solved, and the generated heat is less. By vertically arranging the bridge contacts 300, convection is more facilitated between the slotting tool 200 and the bus bar 100 and between the slotting tool 200 and the drawer base bottom plate heat dissipation holes, and the slotting tool 200 and the bus bar 100 are prevented from being excessively high in temperature rise caused by heat concentration. In order to ensure that the current carrying area is too small due to the fact that the current carrying area is not switched, the thickness of the switching part is limited to be more than 5 mm and less than 15 mm.

In this embodiment, the corner plates 400 are fixed to both sides of the bus bar 100, and the corner plates 400 are fixed to the drawer base 10.

Specifically, the angle plate 400 is bent at 90 degrees, one side plate of the angle plate 400 is fixed with the plugging portion 110, specifically, the other side plate of the angle plate 400 is fixed with the back plate of the drawer seat 10 through a fastener, and in order to prevent the position of the angle plate 400 from conducting and creepage problems, the surfaces of the angle plate 400 and the fastener are provided with insulating coatings.

As shown in fig. 3 and 4, in the present embodiment, a heat dissipation hole 500 penetrating the top and bottom surfaces of the plug portion 210 and/or the plug portion 110 is longitudinally formed at one end of the plug portion that engages with the bridge contact 300. Or one end of the plug part 210 and/or the plug part 110, which is engaged with the bridge contact 300, is longitudinally provided with a heat dissipation hole 500 penetrating through two opposite side surfaces thereof

Specifically, the heat dissipation hole 500 may be a round hole or any other hole with any shape, such as a square hole or a triangular hole, and the hole pattern adopted by the heat dissipation hole 500 is a non-open hole, so that the heat dissipation hole has better mechanical properties, when the plug portion 210 or the plug portion 110 is inserted into the bridge contact 300, the bridge contact 300 is opened under the pushing of the plug portion 210 or the plug portion 110, and meanwhile, the end portion of the plug portion 210 or the plug portion 110 provided with the heat dissipation hole 500 is also subjected to the pressure exerted by the bridge contact 300, and the non-open hole is capable of effectively avoiding the deformation of the plug portion 210 or the plug portion 110 in the plugging and clamping process.

In the present embodiment, the heat dissipation holes 500 have a plurality of heat dissipation holes 500, and the plurality of heat dissipation holes 500 are disposed at intervals along the mounting direction of the plug portion 210 or the plug portion 110. The heat dissipation area is bigger, and the radiating effect is better.

As shown in fig. 5 and 6, in the present embodiment, a side of the heat dissipation hole 500 facing the bridge contact 300 penetrates to an end of the plug portion 210 or the plug portion 110 facing the bridge contact 300.

Specifically, after the heat dissipation hole 500 penetrates to the corresponding end of the plug portion 210 or the socket portion 110 (i.e., the end face of the plug portion 210 and/or the end of the socket portion 110 engaged with the bridge contact 300) near the bridge contact 300, it may be considered that a heat dissipation groove is formed at the end of the plug portion 210 or the socket portion 110 facing the bridge contact 300, and the heat dissipation groove penetrates through the upper and lower surfaces of the plug portion 210 or the socket portion 110 longitudinally. This structural arrangement increases the heat dissipation area of the heat dissipation holes 500.

It should be noted that, in order to ensure the heat dissipation effect and the structural strength, the gap width of the heat dissipation groove should be greater than 5 mm and less than 10 mm, the groove depth is greater than 25 mm and less than 30 mm, and the current carrying area of the switching part is ensured by the switching part with the thickness of 5-10 mm in the middle.

In this embodiment, a triangular groove 600 with an opening facing the bridge-type contact 300 is formed on a side of the heat dissipation hole 500 facing away from the bridge-type contact 300, and an angular bisector of the triangular groove 600 faces the bridge-type contact 300.

Specifically, the triangular groove 600 is set on the basis of a heat dissipation groove, that is, when the plug portion 210 or the plug portion 110 is processed, the heat dissipation groove is formed at one end of the plug portion 210 or the plug portion 110 facing the bridge-type contact 300, and the heat dissipation groove longitudinally penetrates through the upper surface and the lower surface of the head portion 210 or the plug portion 110, while the triangular groove 600 is the bottommost part of the heat dissipation groove, and the bottom of the heat dissipation groove is set to be a plane cone shape, so that the stress intensity between two side structures of the heat dissipation groove is increased, and the plug portion 210 or the plug portion 110 cannot deform due to the clamping force of the bridge-type contact 300 when being extruded and clamped in the bridge-type contact 300, and the structural strength is higher.

In this embodiment, at least one side of the end of the plugging portion 110, which is engaged with the bridge contact 300, is provided with a protruding portion 111, and the protruding portion 111 is engaged inside the bridge contact 300.

Specifically, the protruding portion 111 corresponds to the groove inside the bridge-type contact 300, so that after the plugging portion 110 is inserted into the bridge-type contact 300 for a certain distance, the protruding portion 111 on the surface of the plugging portion will be clamped into the corresponding groove inside the bridge-type contact 300, and the plugging portion 110 is clamped more tightly by the protruding portion 111 and the groove inside the bridge-type contact 300 which are matched with each other.

In the present embodiment, a chamfer 211 is provided at one end corner of the plug portion 210 engaged with the bridge contact 300.

Specifically, the chamfer 211 is disposed at the corner of the plug portion 210 facing one end of the bridge-type contact 300, so that when the plug portion 210 is inserted into the bridge-type contact 300, the chamfer 211 will contact with two sides of the bridge-type contact 300 first, and push the two sides of the bridge-type contact 300 open, so as to stably protrude into the bridge-type contact 300 to complete the insertion.

In one embodiment, a circuit breaker includes a drawer housing 10, a circuit breaker body mounted within the drawer housing 10, and a circuit breaker connection structure of any of the above embodiments.

According to the circuit breaker, the plug-in part 110 and the external part 120 of the bus 100 are integrated, the traditional connection mode of connecting the circuit breaker through the fastener is canceled, and the problem of overlarge contact resistance caused by repeated connection in the traditional connection mode is effectively solved, and the generated heat is less. By vertically arranging the bridge-type contacts 300, the distance between the bridge-type contacts 300 in the horizontal direction is increased, heat superposition caused by too close heating sources is avoided, better heat dissipation effect is achieved, and the wiring of products is facilitated when the external level is kept.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. The utility model provides a circuit breaker connection structure is applied to drawer type circuit breaker, its characterized in that includes:

the bridge-type contact is vertically arranged between the bus and the slotting tool;

the bus comprises an inserting part and an external part, the inserting part and the external part are integrally connected and are respectively positioned inside and outside the drawer seat, the external part is used for connecting an external wire, and the inserting part is clamped with one end of the bridge-type contact;

the plug blade comprises a plug part and a connecting part, wherein the connecting part is used for connecting the breaker body, and the plug part is clamped with the other end of the bridge-type contact.

2. The circuit breaker connection of claim 1 wherein gussets are secured to both sides of the bus bar, the gussets being secured to the drawer mount.

3. The circuit breaker connection structure according to claim 2, wherein the plug portion and/or one end of the plug portion engaged with the bridge contact is provided with a heat dissipation hole penetrating through the top and bottom surfaces thereof or the opposite side surfaces thereof.

4. The circuit breaker connection structure according to claim 2, wherein the plug portion and/or the end face of the end of the plug portion engaged with the bridge contact is provided with a heat dissipation groove penetrating through the top and bottom surfaces thereof or the opposite side surfaces thereof.

5. The circuit breaker connection structure of claim 3, wherein the heat dissipation holes are plural, and the plural heat dissipation holes are disposed at intervals along the plug portion or the socket portion mounting direction.

6. A circuit breaker connection structure according to claim 3, wherein a side of the heat dissipation hole facing the bridge contact penetrates to an end of the plug portion or the socket portion facing the bridge contact.

7. The circuit breaker connection structure of claim 6, wherein a triangular groove with an opening facing the bridge-type contact is formed in a side of the heat dissipation hole facing away from the bridge-type contact, and an angular bisector of the triangular groove faces the bridge-type contact.

8. The circuit breaker connection structure of claim 7, wherein at least one side of an end of the plugging portion, which is engaged with the bridge contact, is provided with a protruding portion, and the protruding portion is engaged inside the bridge contact.

9. The circuit breaker connection structure of claim 8, wherein a chamfer is provided at one end corner of the plug portion that engages the bridge contact.

10. A circuit breaker comprising a drawer housing, a circuit breaker body mounted in the drawer housing, and a circuit breaker connection structure according to any one of claims 1 to 9.