Vehicle-gauge-level precise manganin shunt
By designing insulated sleeves, connecting pipes, elastic plates and heat sinks in the manganese copper shunt, the spacing between the manganese copper sheet and the sampling circuit board is ensured, which facilitates heat dissipation, solves the problem of poor heat dissipation in traditional manganese copper shunts, and improves the accuracy and practicality of current sampling.
Patent Information
- Application Number
- CN202421576620.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-04
AI Technical Summary
In use, traditional manganese copper shunts, due to the large heat generation of the copper sheet, the heat cannot be effectively dissipated, which causes the temperature of the manganese copper sheet and the sampling circuit board to rise, affecting the accuracy of current sampling and may damage other components.
A precision manganese copper diverter of automotive grade is designed. By setting an insulating sleeve and connecting pipe on the manganese copper sheet, and installing elastic plates and heat sinks on the connecting screws, it ensures that there is a spacing between the manganese copper sheet and the sampling circuit board to facilitate heat dissipation. At the same time, heat conduction and insulated silicone materials and heat sinks are used to speed up the heat dissipation speed.
It effectively avoids the temperature rise of manganese copper sheets and sampling circuit boards, improves the accuracy of current sampling, reduces damage or failure to other components, and improves practicality.
Smart Images
Figure CN223038032U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of shunts, and more specifically, to an automotive-grade precision manganese copper shunt. Background Art
[0002] A manganese copper shunt is used to measure direct current. The principle is that when current passes through a resistor with a very small resistance value, a voltage drop is generated for the direct current ammeter to display. It is widely used to expand the current measurement range of instruments and can be used for the return current, current limiting, and current sharing sampling detection of communication systems, electronic equipment, and the power supply of automatic control. The manganese copper shunt is generally in the shape of a sheet and consists of two manganese copper sheets connected together. When the manganese copper shunt is applied, it is usually installed on the sampling circuit board by bolting the mounting holes preset on the manganese copper sheet and the mounting holes on the sampling circuit board so that the manganese copper sheet is closely attached to the sampling circuit board.
[0003] However, during the use of the manganese copper shunt, the heat generated by the copper sheet is relatively large and will be dissipated in large amounts. The traditional manganese copper sheet is fixed by bolts, so there is no gap between the manganese copper sheet and the sampling circuit board during installation. The heat generated by the manganese copper sheet cannot be effectively dissipated into the air but is more likely to be conducted to the sampling circuit board, which may cause the temperature of the manganese copper sheet and the sampling circuit board to rise. High temperature may cause the resistance value of the manganese copper sheet to change, affecting the accuracy of its current sampling, and may also damage or fail other components on the sampling circuit board, resulting in low practicability. Summary of the Utility Model
[0004] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide an automotive-grade precision manganese copper shunt.
[0005] To achieve the above purpose, the present utility model provides the following technical solutions:
[0006] An automotive-grade precision manganese copper shunt includes two manganese copper sheets connected together. The manganese copper sheet is provided with mounting holes, and an insulating sleeve is installed in the mounting holes on the manganese copper sheet. One end of the insulating sleeve is provided with a connecting pipe extending out of the mounting hole, and the diameter of the connecting pipe gradually decreases along the length direction. A connecting screw is arranged in the insulating sleeve. One end of the connecting screw extends out of the connecting pipe and is connected to the mounting hole on the sampling circuit board. The other end of the connecting screw is provided with an elastic plate that abuts against the inner wall of the insulating sleeve. The elastic plate is arranged around the connecting screw and abuts against the inner wall of the connecting pipe. A cross-shaped groove is opened on the end face of the other end of the connecting screw, and the connecting screw can move in the insulating sleeve and the connecting pipe.
[0007] Further, a connecting disk is arranged in the insulating sleeve and is threadedly connected to the insulating sleeve. The connecting screw rotates in the insulating sleeve and the connecting pipe, and the groove is arranged on the connecting disk.
[0008] Further, a plurality of heat sinks surrounding the connecting pipe are installed on the outer wall of the connecting pipe.
[0009] Further, both the insulating sleeve and the connecting pipe are made of silicone materials with heat conduction and insulation characteristics.
[0010] By adopting the above technical solution, the beneficial effects of the utility model are as follows: There is a spacing between the manganese copper sheet and the sampling circuit board during installation, which facilitates the heat generated by the manganese copper sheet to dissipate into the air rather than being more conducted to the sampling circuit board, avoiding the increase in the temperature of the manganese copper sheet and the sampling circuit board, which may affect the accuracy of the current sampling of the manganese copper sheet and damage or failure of other components on the sampling circuit board, and improving the practicability. Description of the Drawings
[0011] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.
[0012] Figure 2 It is a schematic structural diagram of the cooperation between the connecting pipe and the heat sink.
[0013] Figure 3 It is a schematic structural diagram of the cooperation between the elastic plate and the connecting screw.
[0014] In the figure: Sampling circuit board 01, Manganese copper sheet 1, Mounting hole 101, Insulating sleeve 2, Connecting pipe 3, Connecting screw 4, Elastic plate 5, Groove 6, Connecting plate 7, Heat sink 8. Detailed Embodiment
[0015] Refer to Figures 1 to 3 For further description of the embodiments of the present utility model.
[0016] A vehicle-grade precision manganese copper shunt includes two manganese copper sheets 1 connected together. The manganese copper sheet 1 includes a mounting hole 101. An insulating sleeve 2 is installed in the mounting hole 101 on the manganese copper sheet 1. One end of the insulating sleeve 2 is provided with a connecting pipe 3 extending out of the mounting hole 101. The diameter of the connecting pipe 3 gradually decreases along the length direction. A connecting screw 4 is arranged in the insulating sleeve 2. One end of the connecting screw 4 extends out of the connecting pipe 3 and is connected to the mounting hole 101 on the sampling circuit board 01. The other end of the connecting screw 4 is installed with an elastic plate 5 that abuts against the inner wall of the insulating sleeve 2. The elastic plate 5 surrounds the connecting screw 4 and abuts against the inner wall of the connecting pipe 3. A cross-shaped groove 6 is formed on the end face of the other end of the connecting screw 4. The connecting screw 4 rotates in the insulating sleeve 2 and the connecting pipe 3, and the connecting screw 4 moves in the insulating sleeve 2 and the connecting pipe 3.
[0017] Working principle: When the manganin sheet 1 is installed on the sampling circuit board 01, one end of the connecting screw 4 sequentially passes through the insulating sleeve 2 and the connecting pipe 3 and then is connected to the mounting hole 101 on the sampling circuit board 01. Since the connecting screw 4 has threads and can be threadedly connected to the mounting hole 101 on the sampling circuit board 01, it is convenient for the connection between the connecting screw 4 and the sampling circuit board 01 to be more stable. Use a screwdriver to cooperate with the groove 6 to rotate the connecting screw 4 and press the connecting screw 4, so that the elastic plate 5 at the other end of the connecting screw 4 enters the insulating sleeve 2 and abuts against the inner wall of the insulating sleeve 2 to realize the connection between the connecting screw 4 and the manganin sheet 1 and prevent the manganin sheet 1 from approaching the sampling circuit board 01, so that there is a certain distance between the manganin sheet 1 and the sampling circuit board 01. Continue to turn the screwdriver and press the connecting screw 4 to make the elastic plate 5 on the connecting screw 4 continue to move into the connecting pipe 3 and abut against the inner wall of the connecting pipe 3. With the diameter of the connecting pipe 3 gradually decreasing along the length direction, the greater the squeezing force received by the elastic plate 5 as it moves deeper into the connecting pipe 3, so that the elastic plate 5 and the inner wall of the connecting pipe 3 cooperate to further press the connecting screw 4 tightly, making the connection between the connecting screw 4 and the manganin sheet 1 more stable, and then completing the installation of the manganin sheet 1 on the sampling circuit board 01. Finally, when the manganin sheet 1 is installed, there is a spacing between it and the sampling circuit board 01, which is convenient for the heat generated by the manganin sheet 1 to be dissipated into the air rather than being more conducted to the sampling circuit board 01, avoiding the temperature rise of the manganin sheet 1 and the sampling circuit board 01 from affecting the current sampling accuracy of the manganin sheet 1 and the damage or failure of other components on the sampling circuit board 01, and improving the practicability.
[0018] There is a connection disk 7 installed at the other end of the connecting screw 4 inside the insulating sleeve 2. The connection disk 7 is threadedly connected to the insulating sleeve 2. The connecting screw 4 rotates inside the insulating sleeve 2 and the connecting pipe 3. The groove 6 is arranged on the connection disk 7. The threaded connection between the connection disk 7 and the insulating sleeve 2 strengthens the connection stability between the connecting screw 4 and the manganin sheet 1, facilitating the more stable installation of the manganin sheet 1 on the sampling circuit board 01 and improving the practicability. Use a screwdriver to cooperate with the groove 6 to rotate the connection disk 7 and approach the connecting pipe 3, so that the operation of making the bottom of the elastic plate 5 on the connecting screw 4 enter the insulating sleeve 2 and the connecting pipe 3 and abut against the inner walls of the insulating sleeve 2 and the connecting pipe 3 is more labor-saving, facilitating the installation of the connecting screw 4 and the manganin sheet 1. At the same time, the connection disk 7 can be rotated to adjust the position of the connection disk 7 inside the insulating sleeve 2 to adjust the spacing between the manganin sheet 1 and the sampling circuit board 01, so that the heat dissipation space size between the manganin sheet 1 and the sampling circuit board 01 can be changed according to needs, enhancing the practicability.
[0019] Both the insulating sleeve 2 and the connecting pipe 3 are made of silica gel material with the characteristics of heat conduction and insulation. A number of heat sinks 8 are installed on the outer wall of the connecting pipe 3 and arranged around the connecting pipe 3. While insulating the connecting screw 4 from the manganin sheet 1, it is convenient for the heat on the manganin sheet 1 to be transferred to the air dissipated by the heat sinks 8 through the insulating sleeve 2 and the connecting pipe 3, accelerating the heat dissipation speed, improving the heat dissipation effect, and further preventing the temperature rise of the manganin sheet 1 from affecting the accuracy of the current sampling of the manganin sheet 1.
[0020] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.
Claims
1. An automotive grade precision manganese copper shunt, comprising two manganese copper sheets (1) connected together, the manganese copper sheets (1) comprising mounting holes (101), characterized in that: The manganese copper sheet (1) is provided with an insulating sleeve (2) installed in the mounting hole (101), one end of the insulating sleeve (2) is provided with a connecting tube (3) extending out of the mounting hole (101), the diameter of the connecting tube (3) gradually decreases along the length direction, a connecting screw (4) is provided in the insulating sleeve (2), one end of the connecting screw (4) extends out of the connecting tube (3) and is connected to the mounting hole (101) on the sampling circuit board (01), the other end of the connecting screw (4) is provided with an elastic plate (5) which contacts the inner wall of the insulating sleeve (2), the elastic plate (5) is arranged around the connecting screw (4) and contacts the inner wall of the connecting tube (3), the end surface of the other end of the connecting screw (4) is provided with a cross-shaped groove (6), and the connecting screw (4) moves in the insulating sleeve (2) and the connecting tube (3).
2. The automotive grade precision manganese-copper shunt according to claim 1 is characterized in that: The insulating sleeve (2) is provided with a connecting plate (7) mounted on the other end of the connecting screw (4); the connecting plate (7) is threadedly connected to the insulating sleeve (2); the connecting screw (4) rotates in the insulating sleeve (2) and the connecting pipe (3); and the groove (6) is provided on the connecting plate (7).
3. The automotive grade precision manganese-copper shunt according to claim 2 is characterized in that: A plurality of heat sinks (8) arranged around the connecting pipe (3) are mounted on the outer wall of the connecting pipe (3).
4. The automotive grade precision manganese-copper shunt according to claim 3 is characterized in that: The insulating sleeve (2) and the connecting pipe (3) are both made of a silicone material having heat-conducting and insulating characteristics.