Copper profile for manufacturing current shunt

Abstract

The utility model discloses a copper profile for manufacturing a current shunt, and aims to solve the technical problems that in the prior art, after an existing copper profile extrusion part for manufacturing a terminal is cut into the required length of the terminal, or a resistor is directly welded on the welding surface of the terminal, the qualified rate of finished products is often low due to the positioning precision problem, and the production cost is low. The utility model solves the technical problems that the positioning and clamping requirements during the welding connection of the resistor are met by re-clamping the terminal or further machining the welding groove on the welding surface of the terminal, and the time and the labor are wasted, and comprises an inverted T-shaped terminal; the terminal comprises a loading plate and a welding seat which are integrally formed and connected; the welding seat comprises a connecting part connected with the load plate and a welding part connected with the resistor in a welding manner; the cross section of the connecting part is in an isosceles trapezoid shape, and the connecting part comprises two inclined planes which are symmetrically arranged; the welding part is cubic and comprises a welding surface at the bottom; a plurality of welding grooves are evenly distributed in the welding face in the length direction of the sectional material.

Description

Technical Field

[0001] This utility model relates to the field of shunt technology, and in particular to a copper profile for manufacturing current shunts. Background Technology

[0002] A DC current shunt is an instrument used to measure direct current. It consists of two copper-profiled terminals on either side and a low-resistance resistor soldered between the terminals. The resistor is typically made of a manganese-nickel-copper alloy and plated with nickel to prevent oxidation. When a DC current passes through the shunt, a voltage drop is generated across the resistor. This voltage value can be detected and displayed by a compatible DC ammeter, thus indirectly measuring the current magnitude.

[0003] like Figure 1 As shown, existing copper profile extrusions used for manufacturing terminals, after being cut to the required length, either have resistors directly welded onto the welding surface of the terminals, but due to positioning accuracy issues during resistor welding, the finished product qualification rate is often low, or the terminals are re-clamped and the welding surface is further machined with welding grooves to meet the positioning and clamping requirements during resistor welding connection, which is time-consuming, labor-intensive, and increases processing costs. Utility Model Content

[0004] The purpose of this invention is to provide a copper profile for manufacturing current shunts, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A copper profile for manufacturing a current shunt includes a U-shaped terminal; the terminal includes a load plate and a welding seat, which are integrally formed and connected.

[0007] The load plate is flat; the welding seat includes a connecting part connected to the load plate and a welding part welded to the resistor; the cross-section of the connecting part is an isosceles trapezoid shape, including two symmetrically arranged inclined surfaces; the welding part is cubic, including a bottom welding surface; the welding surface has a plurality of welding grooves evenly distributed along the length of the profile; the groove body of the welding groove matches the resistor.

[0008] Preferably, the connecting part has an isosceles trapezoidal cross-section with the two hypotenuses forming an angle of 15°-30° with the base, ensuring the stability and reliability of the connecting structure.

[0009] Preferably, the depth of the welding groove is 2-4 times the thickness of the resistor, which improves the positioning accuracy during welding.

[0010] Preferably, the height of the welded part is greater than 3mm to ensure space for subsequent terminal connection.

[0011] Compared with the prior art, the copper profile for manufacturing current shunts disclosed in this application has the following advantages:

[0012] This invention features a pre-formed welding groove structure for connecting resistors on the welding surface during the copper profile extrusion molding stage. After being cut to the required length, the resistor can be directly welded without the need to re-clamp the cut copper profile for further machining of the welding groove, greatly saving processing costs, time and effort. At the same time, it solves the positioning accuracy problem when directly welding resistors to the welding surface, effectively improving the finished product qualification rate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a DC current shunt in the prior art;

[0014] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the isosceles trapezoidal cross-section of the connecting part in an embodiment of this utility model;

[0016] Figure 4 This is a schematic diagram of the terminal structure processed from the copper profile of this utility model in an embodiment of this utility model;

[0017] Figure 5 This is a schematic diagram of the DC current shunt made from the copper profile of this utility model in an embodiment of this utility model.

[0018] Reference numerals: 1. Load plate; 2. Welding seat; 21. Connecting part; 211. Cross-section of the connecting part; 212. Inclined surface; 213. Included angle; 22. Welding part; 221. Welding surface; 222. Welding groove; 3. Resistor. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] Example 1

[0021] like Figure 1-5 As shown in the figure, this embodiment demonstrates a copper profile for manufacturing a current shunt, including a U-shaped terminal; the terminal includes a load plate 1 and a welding seat 2, which are integrally formed and connected. In the actual DC current measurement application of the DC current shunt, the load plate 1 is detachably connected to the power supply and the load, and the welding seat 2 is connected to a low-resistance resistor 3 by welding.

[0022] In this embodiment, the load plate 1 is flat and can be drilled later for easy connection of power supply and load. The welding seat 2 includes a connecting part 21 connected to the load plate 1 and a welding part 22 welded to the resistor 3. The cross-section 211 of the connecting part is an isosceles trapezoid shape, including two symmetrically arranged inclined surfaces 212, which makes the structure reliable and stable. The welding part 22 is cubic and includes a bottom welding surface 221. The welding surface 221 has a plurality of welding grooves 222 evenly distributed along the length of the profile. The grooves 222 match the resistor 3, which facilitates the direct positioning and insertion of the resistor 3 and its welding. It eliminates the need to re-clamp the cut copper profile for further machining of the welding grooves 222, greatly saving processing costs, time and effort.

[0023] Example 2

[0024] like Figure 1-5 As shown, another embodiment illustrates a copper profile for manufacturing a current shunt, further illustrating that in a further possible implementation of this embodiment, such as Figure 3 As shown, the connecting part 21 has an isosceles trapezoidal cross-section with the two hypotenuses and the base forming an angle 213 of 15°-30°, further ensuring the stability and reliability of the connecting structure.

[0025] Example 3

[0026] like Figure 1-5 As shown, another embodiment illustrates a copper profile for manufacturing a current shunt, further illustrating that in a further possible implementation of this embodiment, such as Figure 4-5 As shown, the depth of the welding groove 222 is 2-4 times the thickness of the resistor 3. In actual welding, the resistor 3 is first inserted into the welding groove 222 before welding, which effectively improves the positioning accuracy and portability during welding.

[0027] Example 4

[0028] like Figure 1-5 As shown, another embodiment illustrates a copper profile for manufacturing a current shunt, further illustrating that in a further possible implementation of this embodiment, such as Figure 4 As shown, the height of the welding part 22 is greater than 3mm, ensuring space for subsequent terminal connection.

[0029] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A copper profile for manufacturing current shunts, characterized in that: Includes a U-shaped terminal; the terminal includes a load plate and a welding seat, which are integrally formed and connected; The load plate is flat; the welding seat includes a connecting part connected to the load plate and a welding part welded to the resistor; the cross-section of the connecting part is an isosceles trapezoid shape, including two symmetrically arranged inclined surfaces; the welding part is cubic, including a bottom welding surface; the welding surface has a plurality of welding grooves evenly distributed along the length of the profile; the groove body of the welding groove matches the resistor.

2. The copper profile for manufacturing a current shunt according to claim 1, characterized in that: The connecting part has an isosceles trapezoidal cross-section with the two hypotenuses and the base forming an angle of 15°-30°.

3. A copper profile for manufacturing a current shunt according to claim 1, characterized in that: The depth of the welding groove is 2-4 times the thickness of the resistor.

4. A copper profile for manufacturing a current shunt according to claim 1, characterized in that: The height of the welded part is greater than 3mm.

Images