CN220731443U

CN220731443U - Fuse base structure

Info

Publication number: CN220731443U
Application number: CN202322442852.3U
Authority: CN
Inventors: 郑恭厉; 许贵秋; 张庭
Original assignee: Hollyland Xiamen Circuit Protection Technology Co ltd
Current assignee: Hollyland Xiamen Circuit Protection Technology Co ltd
Priority date: 2023-09-08
Filing date: 2023-09-08
Publication date: 2024-04-05
Anticipated expiration: 2033-09-08

Abstract

The utility model discloses a fuse base structure, which comprises a base shell, wherein the middle part of the base shell is provided with a mounting groove for mounting a fuse, and both ends of the mounting groove are respectively provided with a pipe clamp; the pipe clamp comprises a fixing sheet movably propped against the end part of the mounting groove and a connecting sheet spliced on a wire frame arranged on the base shell; the connecting piece is of an aluminum structure, the fixing piece is of a copper structure, and the connecting part of the fixing piece and the connecting piece is welded and fixed through anaerobic brazing. The welding technology in the anaerobic state is adopted between the connecting sheet and the fixing sheet of the pipe clamp, so that the two conductors are reliably welded together. Can effectively prevent chemical reaction and oxidation corrosion. Therefore, when the aluminum connecting sheet and the aluminum wire are connected in a pressing manner in the wiring frame, electrochemical corrosion to the aluminum wire can not be generated, the contact resistance of the contact point can not be increased, and the stability and the reliability of the fuse base are ensured.

Description

Fuse base structure

Technical Field

The utility model relates to a fuse, in particular to a fuse base structure.

Background

A fuse (fuse) is an electric appliance that fuses a melt by heat generated by itself when a current exceeds a predetermined value, and opens a circuit. At present, the wire connected with the fuse base is changed from a copper wire to an aluminum wire in many occasions, so that the construction cost of a power system is saved.

However, if the conductive parts of the wires connected to the two sides of the fuse base are made of copper materials, if the aluminum wires are directly connected with the fuse base in a screw fastening manner, larger gaps appear at the contact positions due to the difference of the thermal expansion coefficients and the elastic moduli of the aluminum wires after long-term use, so that electrochemical corrosion to the aluminum wires is formed, the contact resistance of contact points is increased, the temperature of the contact points is greatly increased, and finally the fuse base is burnt.

Disclosure of Invention

The utility model aims to provide a fuse base, which can solve the problems of the existing aluminum wire connected fuse base, so that the fuse base has good product performance and ensures the normal use of a power system.

In order to achieve the above object, the solution of the present utility model is:

a fuse base structure comprises a base shell, wherein the middle part of the base shell is provided with a mounting groove for mounting a fuse, and both ends of the mounting groove are respectively provided with a pipe clamp;

the pipe clamp comprises a fixing sheet movably propped against the end part of the mounting groove and a connecting sheet spliced on a wire frame arranged on the base shell; the connecting piece is of an aluminum structure, the fixing piece is of a copper structure, and the connecting part of the fixing piece and the connecting piece is welded and fixed through anaerobic brazing.

Further, the fixed end of the fixing piece is fixed on the base shell and is connected with the connecting piece; the outer side of the fixing piece is provided with a clamping spring, so that the movable end of the fixing piece is subjected to the elasticity of the clamping spring and has a tendency of extending into the end part of the mounting groove.

Further, the movable end of the fixing piece is provided with an arc-shaped contact part.

Further, the two wire frames are respectively arranged at two ends of the base shell, each wire frame comprises an adjusting screw, a connecting frame and a connecting pressing piece, each connecting pressing piece is provided with a pressing part which is positioned inside the connecting frame, the adjusting screw is adjustably arranged on the connecting frame in a penetrating mode, the pressing parts of the connecting pressing pieces can be driven to vertically displace in the connecting frame, and a connecting area for the connecting piece and the aluminum wires to stretch is formed on the bottom surface inside the connecting frame.

Further, the connecting pieces and the pressing parts are provided with meshing structures on the contact planes.

Further, the engagement structure of the connecting sheet is a plurality of convex ribs arranged on the upper surface of the connecting sheet in a protruding mode, the engagement structure of the pressing portion is a plurality of convex ribs arranged on the lower surface of the pressing portion in a protruding mode, and the convex ribs of the connecting sheet and the pressing portion are arranged in a staggered mode.

After the technical scheme is adopted, as the welding technology in an anaerobic state is adopted between the connecting sheet and the fixing sheet of the pipe clamp, the two conductors are reliably welded together. When a current flows to cause heat generation, an oxide layer having high hardness and poor electric conductivity is not generated. Electrochemical corrosion and corresponding oxidation reactions are therefore difficult to occur in a tightly welded, seamless structure, and do not lead to a temperature rise at the location of the copper-aluminum interface, so that there is a risk of combustion. Can effectively prevent chemical reaction and oxidation corrosion.

Therefore, electrochemical corrosion to the aluminum wire can not be generated when the aluminum connecting sheet and the aluminum wire are connected in a pressing manner in the wiring frame, contact resistance of the contact point can not be increased, and stability and reliability of the fuse base are effectively guaranteed.

Drawings

Fig. 1 is a perspective view of a fuse according to an embodiment of the present utility model.

Fig. 2 is a front view of an embodiment of the present utility model.

Fig. 3 is a cross-sectional view of a pipe clamp according to an embodiment of the present utility model.

Fig. 4 is a schematic diagram illustrating the cooperation between a pipe clamp and a wire frame according to an embodiment of the present utility model.

Symbol description:

base shell 10, mounting groove 1, pipe clamp 2, stationary blade 21, stiff end 211, movable end 212, arc contact 2121, connection piece 22, jump ring 3, terminal frame 4, adjusting screw 41, connection frame 42, connection preforming 43, pressfitting portion 431, connection district 44, engagement structure 5, sand grip 51, fuse 20.

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. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in place when the product of the application is used, or the orientation or positional relationship conventionally understood by those skilled in the art, is merely for convenience of describing the present application and simplifying the description, and is not indicative or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

As shown in fig. 1 and 2, the fuse base structure of the present utility model includes a base housing 10, a mounting groove 1 for mounting a fuse 20 is provided in the middle of the base housing 10, and pipe clamps 2 are provided at both ends of the mounting groove 1.

The pipe clamp 2 is mounted on the base housing 10, see fig. 3, and comprises a fixing piece 21 and a connecting piece 22 connected to each other.

The fixed end 211 of the fixing piece 21 is fixed on the base shell 10 and is connected with the connecting piece 22, the movable end 212 of the fixing piece 21 is movably close to the end part of the mounting groove 1, and the clamping spring 3 is arranged on the outer side of the fixing piece 21, so that the movable end 212 of the fixing piece 21 is subjected to the elastic force of the clamping spring 3 to have the trend of extending into the end part of the mounting groove 1, and therefore, when the fuse 20 is mounted in the mounting groove 1, two ends of the fuse 20 can be tightly connected with the movable ends 212 of the fixing pieces 21 of the two pipe clamps 2 respectively.

The movable end 212 may be provided with an arcuate contact 2121 to increase the contact area of the collet 2 with the circular end cap of the fuse 20 for securing connectivity.

The connecting pieces 22 of the two pipe clamps 2 extend to the left and the right sides respectively and are inserted into the connecting frames 4 respectively arranged at the two ends of the base shell 10.

Referring to fig. 4, the wire frame 4 includes an adjusting screw 41, a connecting frame 42 and a connecting pressing piece 43, the connecting pressing piece 43 has a pressing portion 431 located inside the connecting frame 42, the adjusting screw 41 is adjustably disposed through the connecting frame 42, and can drive the pressing portion 431 of the connecting pressing piece 43 to move up and down in the connecting frame 42, and the pressing portion 431 and the inner bottom surface of the connecting frame 42 form a connecting area 44.

The connecting piece 22 and the aluminum wire are stacked in the connecting area 44, and are pressed and locked by the pressing part 431 of the connecting pressing piece 43, and the upper and lower heights of the pressing part 431 are adjusted by the adjusting screw 41.

The pipe clamp 2 of the utility model is of a copper-aluminum transition pipe clamp 2 structure, namely, the connecting piece 22 is of an aluminum structure, the fixing piece 21 is of a copper structure, and the connecting part of the fixing piece 21 and the connecting piece 22 is welded and fixed by anaerobic brazing (the prior welding technology).

The welding technology in an anaerobic state is adopted between the connecting piece 22 and the fixing piece 21 of the pipe clamp 2, so that the two conductors are reliably welded together. When a current flows to cause heat generation, an oxide layer having high hardness and poor electric conductivity is not generated. Electrochemical corrosion and corresponding oxidation reactions are therefore difficult to occur in a tightly welded, seamless structure, and do not lead to a temperature rise at the location of the copper-aluminum interface, so that there is a risk of combustion. Can effectively prevent chemical reaction and oxidation corrosion.

Therefore, when the aluminum connecting piece 22 and the aluminum wire (not shown) are mutually pressed and connected in the wire frame 4, electrochemical corrosion to the aluminum wire can not be generated, the contact resistance of the contact point can not be increased, and the stability and the reliability of the base of the fuse 20 are ensured.

The engaging structures 5 are disposed on the planes of the connecting pieces 22 and the pressing portions 431, so that the connecting pieces 22 and the pressing portions 431 can be engaged with each other, and the contact area between the aluminum wires inserted into the connection areas 44 and the connecting pieces 22 is increased, thereby improving the conductivity.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that equivalent changes and modifications can be made by those skilled in the art without departing from the principles of the present utility model, which still falls within the scope of the present utility model.

Claims

1. A fuse base structure comprises a base shell, wherein the middle part of the base shell is provided with a mounting groove for mounting a fuse, and both ends of the mounting groove are respectively provided with a pipe clamp; the method is characterized in that:

2. A fuse base structure in accordance with claim 1 wherein: the fixed end of the fixing piece is fixed on the base shell and is connected with the connecting piece; the outer side of the fixing piece is provided with a clamping spring, so that the movable end of the fixing piece is subjected to the elasticity of the clamping spring and has a tendency of extending into the end part of the mounting groove.

3. A fuse base structure in accordance with claim 2 wherein: the movable end of the fixing piece is provided with an arc-shaped contact part.

4. A fuse base structure in accordance with claim 1 wherein: the connecting piece comprises a base shell, and is characterized in that two connecting frames are arranged at two ends of the base shell respectively, each connecting frame comprises an adjusting screw, a connecting frame and a connecting pressing piece, the connecting pressing piece is provided with a pressing portion which is located inside the connecting frame, the adjusting screw is adjustably arranged on the connecting frame in a penetrating mode, the pressing portion of the connecting pressing piece can be driven to move up and down in the connecting frame, and a connecting area for the connecting piece and an aluminum wire to stretch is formed on the bottom surface inside the connecting frame and the pressing portion.

5. A fuse base structure in accordance with claim 4 wherein: and the planes of the connecting sheets, which are contacted with the pressing parts, are provided with meshing structures.

6. A fuse base structure in accordance with claim 5 wherein: the engagement structure of connection piece is the protruding sand grip of locating the connection piece upper surface of a plurality of intervals, and the engagement structure of pressfitting portion is the protruding sand grip of locating pressfitting portion lower surface of a plurality of intervals to connection piece and pressfitting portion's sand grip are crisscross setting each other.