High-precision diverter

Abstract

The utility model relates to the technical field of diverters, in particular to a high-precision diverter which comprises a substrate, a diverter body is arranged at the top of the substrate, current plates and conductive columns are arranged on the two sides of the top of the substrate, connecting holes used in cooperation with the conductive columns are formed in the side plates on the two sides of the diverter body, and a shielding shell is arranged at the top of the substrate in an inserted mode. A first telescopic rod and a clamping block are arranged in the base plate through a sliding plate, and a clamping block used in cooperation with a limiting block is arranged in the position, located in the inserting groove, of the shielding shell. According to the shunt, the influence of external electromagnetic interference on the measurement signal of the shunt is reduced, the shunt can be conveniently replaced or overhauled by a worker through the quick-release shielding shell, and in addition, the circuit connection quality of the shunt and the guide plate is ensured under the action of the fixing bolt and the contact plate.

Description

Technical Field

[0001] This utility model relates to the field of splitter technology, specifically a high-precision splitter. Background Technology

[0002] Shunts are widely used in the current measurement range of instruments. They can be used for current return, current limiting, current sharing and sampling detection in communication systems, electronic equipment, and power supplies for automation control. The main characteristic of the shunt body is that it is a low-resistance device with a sampling terminal.

[0003] Current shunts lack any protection devices and are generally just a low-resistance circuit exposed, which does not guarantee safety. In complex operating environments, they are easily affected by external factors, such as dusty environments in factories. Therefore, we propose a high-precision shunt. At the same time, the shunt generates a certain amount of heat during operation. If it cannot be dissipated in a timely and effective manner, the shunt temperature will rise, which will affect its measurement accuracy and service life. Traditional shunt cooling methods are relatively simple and often cannot meet the cooling requirements under high-intensity operation. Therefore, we propose a high-precision shunt. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision shunt to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-precision shunt, comprising a substrate, a shunt disposed on the top of the substrate, current plates disposed on both sides of the top of the substrate, conductive posts disposed on the current plates, connection holes for cooperating with the conductive posts disposed on both sides of the shunt, slots disposed on both sides of the top of the substrate inside the current plates, a shielding shell inserted into the slot, a heat dissipation mechanism and a fixing mechanism disposed on the substrate; the heat dissipation mechanism, heat dissipation fins disposed on the top of the substrate below the shunt, a heat dissipation fan disposed at the bottom of the heat dissipation fins via a mounting plate; the fixing mechanism, a cavity disposed inside the substrate, a sliding plate slidably disposed inside the cavity, a locking block disposed on the side wall of the sliding plate, a locking block for cooperating with a limiting block disposed on the shielding shell inside the slot, a first telescopic rod disposed inside the cavity, the end of the telescopic arm of the first telescopic rod connected to the sliding plate.

[0006] Preferably, the side plate of the distributor is further provided with an installation cavity inside the connection hole. A plurality of second telescopic rods are evenly arranged on the inner wall of the installation cavity. The telescopic arm end of the second telescopic rod is provided with a contact plate and connected to the conductive post. A contact rod is provided on one side wall of the contact plate. A plurality of sliding holes are also evenly arranged inside the side plate of the distributor. The contact rod is slidably connected to the sliding hole. A limit plate is provided at one end of the contact rod.

[0007] Preferably, a first spring is also sleeved on the outside of the first telescopic rod, with one end of the first spring connected to the slide plate and the other end of the first spring connected to the inner wall of the cavity.

[0008] Preferably, a second spring is also sleeved on the outside of the second telescopic rod, with one end of the second spring connected to the contact plate and the other end of the second spring connected to the side wall of the mounting cavity.

[0009] Preferably, the conductive post is also provided with a fixing nut by a threaded connection.

[0010] Preferably, the shunt is further provided with terminals.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the slots on both sides of the top of the substrate can be used to insert a shielding shell, which can provide electromagnetic shielding for the shunt, reduce the influence of external electromagnetic interference on the shunt measurement signal, and improve measurement accuracy. Through the cooperation of the slide plate, locking block, first telescopic rod and first spring in the cavity, the shielding shell can be conveniently installed and fixed, which enhances the overall protection performance of the shunt, enabling it to better adapt to harsh working environments and effectively prevent damage to the shunt caused by mechanical impact, dust and other factors, thus ensuring the normal operation of the entire electronic system. In addition, it also facilitates the disassembly of the shielding shell, thereby facilitating the replacement or maintenance of the shunt. At the same time, by setting heat dissipation fins below the shunt and equipping it with a cooling fan, the airflow can be accelerated, effectively removing the heat generated by the shunt during operation, greatly improving the heat dissipation efficiency, ensuring that the shunt operates at a suitable temperature, thereby guaranteeing its measurement accuracy and service life.

[0012] In addition, the connection holes on both sides of the shunt are used in conjunction with the conductive posts on the current plate and are further secured with fixing nuts. At the same time, the mounting cavity inside the side plate of the shunt is equipped with a second telescopic rod, contact plate, contact rod and other structures. Under the elastic force of the second spring, the contact plate is always tightly attached to the conductive post. Even if there is positional deviation or vibration during installation or use, a good electrical connection between the shunt and the current plate can be guaranteed, which improves the stability of current measurement. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a side view of the structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the shielding shell of this utility model;

[0016] Figure 4 For the present utility model Figure 3Enlarged view of the structure at point A in the middle;

[0017] Figure 5 For the present utility model Figure 3 Enlarged view of the structure at point B in the middle.

[0018] The components represented by each number in the attached diagram are listed below: 1. Base plate; 2. Heat sink fins; 3. Mounting plate; 4. Cooling fan; 5. Current plate; 6. Shunt; 7. Conductive post; 8. Fixing nut; 9. Terminal post; 10. Shielding shell; 11. Cavity; 12. Slide plate; 13. Locking block; 14. First telescopic rod; 15. First spring; 16. Limiting block; 17. Slot; 18. Mounting cavity; 19. Second telescopic rod; 20. Contact plate; 21. Second spring; 22. Contact rod; 23. Limiting plate; 24. Sliding hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides a technical solution: such as Figures 1-5 The high-precision shunt shown includes a base plate 1, a shunt 6 on the top of the base plate 1, and a heat sink fin 2 below the shunt 6 on the top of the base plate 1. A cooling fan 4 is mounted on the bottom of the heat sink fin 2 via a mounting plate 3. The resistor plate of the shunt 6 contacts the heat sink fin 2. Current plates 5 are arranged on both sides of the top of the base plate 1, and conductive posts 7 are arranged on the current plates 5. Connection holes for use with conductive posts 7 are arranged on both sides of the shunt 6. A terminal post 9 is also provided on the shunt 6. Under the action of the terminal post 9, it can be connected to an external current detection device through a wire. The conductive post 7 is also provided with a fixing nut 8 through a threaded connection.

[0021] On the top two sides of the substrate 1, inside the current plate 5, there are slots 17. A shielding shell 10 is inserted into the slots 17. A cavity 11 is also provided inside the substrate 1. A sliding plate 12 is slidably arranged inside the cavity 11. A locking block 13 is provided on the side wall of the sliding plate 12. A locking block 13 is also provided on the shielding shell 10 inside the slots 17, which works with the limiting block 16. Under the action of the locking block 13, the shielding shell 10 can be installed and fixed. A first telescopic rod 14 is also provided inside the cavity 11. The end of the telescopic arm of the first telescopic rod 14 is connected to the sliding plate 12. A first spring 15 is also sleeved on the outside of the first telescopic rod 14. One end of the first spring 15 is connected to the sliding plate 12, and the other end of the first spring 15 is connected to the inner wall of the cavity 11.

[0022] A mounting cavity 18 is also provided inside the connection hole on the side plate of the shunt 6. Several second telescopic rods 19 are evenly arranged on the inner wall of the mounting cavity 18. The end of the telescopic arm of the second telescopic rod 19 is provided with a contact plate 20 and connected to the conductive post 7. A contact rod 22 is provided on one side wall of the contact plate 20. Several sliding holes 24 are also evenly arranged inside the side plate of the shunt 6. The contact rod 22 is slidably connected to the sliding hole 24. A limit plate 23 is provided at one end of the contact rod 22. Under the action of the limit plate 23, the connection quality between the contact rod 22 and the side plate of the shunt 6 is guaranteed, and the occurrence of contact rod 22 falling off can also be reduced, thereby ensuring the connection quality between the shunt 6 and the current plate 5. A second spring 21 is also sleeved on the outside of the second telescopic rod 19. One end of the second spring 21 is connected to the contact plate 20, and the other end of the second spring 21 is connected to the side wall of the mounting cavity 18.

[0023] Working principle: When the device is working, the current is introduced from the external circuit and passes through the current plates 5 set on both sides of the top of the substrate 1. The conductive posts 7 on the current plates 5 play the role of conducting the current. The connection holes set on both sides of the shunt 6 are used in conjunction with the conductive posts 7 to connect the shunt 6 to the current plates 5. The connection is further secured by the fixing nuts 8 connected by threads on the conductive posts 7 to ensure the stability of the connection and allow the current to be stably transmitted to the shunt 6. The shunt 6 generates heat during operation. In order to ensure its normal operating temperature, the resistance plate of the shunt 6 contacts the heat sink fins 2. The heat sink fins 2 can increase the heat dissipation area. After the cooling fan 4 is started, it accelerates the air flow and dissipates the heat absorbed on the heat sink fins 2, thereby achieving effective heat dissipation of the shunt 6.

[0024] In terms of current detection, the shunt 6 is also equipped with a terminal 9, which can be connected to an external current detection device through a wire, so that the current signal detected by the shunt 6 can be transmitted to the external device, making it convenient to monitor and analyze the current.

[0025] For the installation of the shielding shell 10, slots 17 are provided on both sides of the top of the substrate 1, located on the side wall of the current plate 5, and the shielding shell 10 is inserted into the slots 17. A sliding plate 12 is slidably disposed in the cavity 11 inside the substrate 1. A locking block 13 on the side wall of the sliding plate 12 cooperates with a limiting block 16 located inside the slot 17 on the shielding shell 10. When installing the shielding shell 10, it is inserted into the slot 17, pushing the sliding plate 12 to slide within the cavity 11. The first telescopic rod 14 retracts, compressing the first spring 15. When the shielding shell 10 is fully inserted, under the elastic force of the first spring 15, the sliding plate 12 drives the locking block 13 to reset, and the locking block 13 engages with the limiting block 16, thereby fixing the shielding shell 10 to the substrate 1 and providing electromagnetic interference shielding. In the connection between the shunt 6 and the current plate 5, several second telescopic rods 19 are evenly distributed on the inner wall of the mounting cavity 18 inside the side plate of the shunt 6. A contact plate 20 at the end of the telescopic arm of the second telescopic rod 19 is connected to the conductive post 7. The contact rod 22 on one side wall of the contact plate 20 is slidably connected to the sliding holes 24 evenly arranged inside the side plate of the shunt 6. The limiting plate 23 at one end of the contact rod 22 ensures the contact quality between the contact rod 22 and the side plate of the shunt 6, preventing the contact rod 22 from falling off, thereby ensuring the connection quality between the shunt 6 and the current plate 5. At the same time, one end of the second spring 21 sleeved on the outside of the second telescopic rod 19 is connected to the contact plate 20, and the other end is connected to the side wall of the mounting cavity 18. Under the elastic force of the second spring 21, the contact plate 20 is always tightly attached to the conductive post 7. Even if there is a positional deviation or vibration between the shunt 6 and the current plate 5 during installation or use, a good electrical connection between them can be ensured.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision shunt comprising a substrate (1), characterized in that: The substrate (1) top is provided with a shunt (6), the substrate (1) top two sides are provided with a current plate (5), the current plate (5) is provided with a conductive column (7), the shunt (6) two sides are provided with a connecting hole matched with the conductive column (7), the substrate (1) top two sides are provided with a slot (17) inside the current plate (5), the slot (17) is provided with a shielding shell (10), the substrate (1) is provided with a heat dissipation mechanism and a fixing mechanism; The heat dissipation mechanism, the substrate (1) top is provided with a heat dissipation fin (2) below the shunt (6), the heat dissipation fin (2) bottom is provided with a heat dissipation fan (4) through the mounting plate (3); The fixing mechanism, the substrate (1) is further provided with a cavity (11), the cavity (11) is provided with a sliding plate (12), the sliding plate (12) side wall is provided with a clamping block (13), the shielding shell (10) is provided with a clamping block (13) matched with the limiting block (16) inside the slot (17), the cavity (11) is further provided with a first telescopic rod (14), the first telescopic rod (14) telescopic arm end is connected with the sliding plate (12).

2. A high-precision shunt according to claim 1, characterized in that: The shunt (6) side plate is provided with a mounting cavity (18) inside the connecting hole, the mounting cavity (18) inner wall is uniformly provided with a plurality of second telescopic rods (19), the second telescopic rod (19) telescopic arm end is provided with a contact plate (20) connected with the conductive column (7), the contact plate (20) one side wall is provided with a contact rod (22), the shunt (6) side plate is further provided with a plurality of sliding holes (24), the contact rod (22) is connected with the sliding hole (24), the contact rod (22) one end is provided with a limiting plate (23).

3. The high-precision shunt of claim 1, wherein: The first telescopic rod (14) outer side is further provided with a first spring (15), one end of the first spring (15) is connected with the sliding plate (12), the other end of the first spring (15) is connected with the cavity (11) inner wall.

4. A high-precision shunt according to claim 2, characterized in that: The second telescopic rod (19) outer side is further provided with a second spring (21), one end of the second spring (21) is connected with the contact plate (20), the other end of the second spring (21) is connected with the mounting cavity (18) side wall.

5. The high-precision shunt of claim 1, wherein: The conductive column (7) is further provided with a fixed nut (8) through the threaded connection.

6. A high accuracy shunt according to claim 1, characterized in that: The shunt (6) is further provided with a terminal post (9).

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