Open-loop Hall current sensor

Abstract

The invention relates to the technical field of Hall current sensors, and particularly discloses an open-loop Hall current sensor which comprises a semi-ring main assembly body, a semi-ring auxiliary assembly body and a bottom plate, the semi-ring auxiliary assembly body is rotatably connected to the left side of the upper end of the semi-ring main assembly body, and a clamping sleeve is fixedly installed at the right end of the semi-ring auxiliary assembly body. The right half part of the upper end of the semi-ring main assembly body is clamped with a clamping sleeve through a connecting mechanism, the front surface of the semi-ring main assembly body is provided with a wiring terminal, the lower end of the semi-ring main assembly body is fixedly connected with a connecting block, and the lower end of the connecting block is provided with a slot. When the Hall current sensor is disassembled, a detected wire in the sensor needs to be taken out, so that a convex part of a first convex plate can be directly pulled, a first clamping block connected with the first convex plate is separated from a clamping sleeve, then the semi-ring auxiliary assembly body is overturned on the semi-ring main assembly body, and the first clamping block is separated from the clamping sleeve. Therefore, the lead between the semi-ring main assembly body and the semi-ring auxiliary assembly body can be directly taken out.

Description

Technical Field

[0001] The invention relates to the technical field of Hall current sensors, in particular to an open-loop Hall current sensor. Background Art

[0002] The open-loop Hall current sensor consists of a Hall element, a magnetic core with an air gap made of soft magnetic material, and an appropriate amplifier circuit. The working process is: the Hall element detects the magnetic induction intensity generated by the primary current in the air gap of the magnetic core, and the output voltage of the Hall element is adjusted and amplified to 0-4V or 0-5V output by the amplifier. Since the working process of this current sensor is an open loop structure, it is called an open-loop Hall current sensor.

[0003] A Chinese patent with publication number CN210775629U discloses a detachable magnetic circuit installation structure for an open-loop Hall current sensor, including a housing and a magnetic core with two air gaps of the same width and symmetrical distribution installed in the housing, a PCB board and a shielding frame installed on the PCB board. The housing is divided into two detachable parts, an upper housing body and a lower housing body, with the center line of the through-core hole as the baseline. Copper columns and screw installation areas and copper inserts and screw installation areas are respectively provided on both sides of the upper housing body and the lower housing body, and are fixed by a rotating shaft structure and copper columns or copper rivets and copper inserts and stainless steel screws respectively; the upper housing body is provided with an upper body installation area of ​​the magnetic core, a magnetic core baffle and an upper body elastic buckle structure.

[0004] During the actual use and operation of the Hall current sensor in the above-mentioned prior art, we found that there are still some shortcomings. For example, the traditional Hall current sensor base has two mounting holes, and when installing, it is generally installed on the power equipment by tools and screws. Once the Hall current sensor fails and needs to be disassembled, replaced or maintained, special disassembly and assembly tools must be used to disassemble and replace it. Therefore, the disassembly and assembly is still not efficient and convenient enough. Summary of the invention

[0005] The object of the present invention is to provide an open-loop Hall current sensor to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides an open-loop Hall current sensor, comprising a semi-ring main assembly, a semi-ring sub-assembly and a bottom plate, wherein the semi-ring sub-assembly is rotatably connected to the left side of the upper end of the semi-ring main assembly, a ferrule is fixedly installed on the right end of the semi-ring sub-assembly, the upper right half of the semi-ring main assembly is clamped by a connecting mechanism and the ferrule, a wiring terminal is provided on the front of the semi-ring main assembly, a connecting block is fixedly connected to the lower end of the semi-ring main assembly, a slot is provided at the lower end of the connecting block, a positioning mechanism is fixedly installed at the upper end of the bottom plate, the connecting block is plugged into the upper end of the positioning mechanism through the slot, grooves are symmetrically provided at both ends of the connecting block, and clamping grooves are symmetrically provided on the inner side wall of the groove, and the bottom plate is clamped by a fixing mechanism and the clamping groove;

[0007] The connecting mechanism includes a connecting seat, the connecting seat is fixedly connected to the right end of the semi-ring main assembly, the upper ends of the connecting seat are respectively provided with a first mounting groove and a second mounting groove, the inner side of the first mounting groove is symmetrically fixedly installed with a first guide rod, the outer side of the first guide rod is slidably connected with a first convex plate, the end of the first guide rod close to the first convex plate is sleeved with a first spring, the side of the first convex plate away from the first spring is fixedly installed with a first clamping block, the clamping end of the first clamping block is movably extended into the inner side of the second mounting groove, the clamping end of the first clamping block is clamped with the clamping sleeve, and the semi-ring main assembly and the semi-ring auxiliary assembly of the sensor can be conveniently switched quickly through the connecting mechanism, so that the detection circuit can be quickly removed from the sensor;

[0008] The fixing mechanism comprises a positioning shell, the positioning shell is symmetrically fixedly mounted on the upper end of the bottom plate, the positioning shell is inserted into the inner side of the groove, a third guide rod is symmetrically fixedly mounted on the inner side of the positioning shell, a second convex plate is symmetrically slidably connected to the outer side of the third guide rod, a third spring is symmetrically fixedly mounted between the second convex plates, one end of the third guide rod passes through the middle part of the third spring, a second clamping block is fixedly mounted on the side of the second convex plate away from the third spring, and the clamping end of the second clamping block movably passes through the shell wall of the positioning shell and is clamped in the clamping groove, and the semi-ring main assembly can be conveniently disassembled and assembled from the bottom plate for use through the fixing mechanism;

[0009] The positioning mechanism includes an insert block, which is fixedly connected to the upper end of the base plate, and the base plate is plugged in through the insert block and the slot. The outer sides of the ends of the insert block are provided with assembly grooves, and the inner sides of the assembly grooves are symmetrically fixedly installed with a second guide rod, and the outer sides of the second guide rod are slidably connected with the same mounting plate, and a second spring is fixedly installed between the mounting plate and the assembly groove, and one end of the second guide rod passes through the middle part of the second spring, and a push block is fixedly installed on the upper end of the mounting plate, and the end of the push block away from the mounting plate slides through the top inner wall of the assembly groove. Through the positioning mechanism, the semi-ring main assembly can be further conveniently disassembled from the base plate.

[0010] Furthermore, a sleeve is provided with a sleeve groove on one side of the clamping block, and the sleeve is clamped with the clamping end of the first clamping block through the sleeve groove. The clamping end of the first clamping block can be conveniently clamped and fixed with the sleeve groove through the sleeve groove.

[0011] Furthermore, a first sliding groove is symmetrically opened on the inner side of the first installation groove, and the end of the first protruding plate is slidably connected to the inner side of the first installation groove. Through the first sliding groove, the first protruding plate can slide conveniently on the inner side of the first installation groove.

[0012] Furthermore, a first blocking cover is fixedly installed at the notch of the first mounting slot, a first rectangular hole is opened on the inner side of the first blocking cover, the convex portion of the first convex plate movably passes through the first rectangular hole, and the notch of the first mounting slot can be covered by the first blocking cover with the first rectangular hole.

[0013] Furthermore, a second sliding groove is symmetrically provided on the inner side of the positioning shell, and the end of the second protruding plate is slidably connected to the inner side of the second sliding groove. Through the second sliding groove, the second protruding plate can slide conveniently on the inner side of the positioning shell.

[0014] Furthermore, a second blocking cover is fixedly installed at the shell opening of the positioning shell, and a second rectangular hole is symmetrically opened on the inner side of the second blocking cover. The convex parts of the second convex plate can be movably passed through the second rectangular hole. The shell opening of the positioning shell can be conveniently covered by the second blocking cover with the second rectangular hole.

[0015] Furthermore, a through hole is opened on the top inner wall of the assembly groove, and the upper end of the push block slides through the through hole. The upper end of the push block can slide through the assembly groove through the through hole on the inner wall of the assembly groove.

[0016] Furthermore, the shape and specification of the plug block are adapted to the slot, and the assembly slot is provided on the side of the plug block end facing the positioning shell. By adapting the plug block to the slot, the push block half-ring main assembly can be lifted up conveniently during disassembly.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] First, in the present invention, when disassembling the Hall current sensor, it is necessary to take out the wire detected in the sensor, so the convex part of the first convex plate can be directly pressed to separate the first clamping block connected to the first convex plate from the clamping sleeve, and then the semi-ring sub-assembly is flipped on the semi-ring main assembly, and the wire between the semi-ring main assembly and the semi-ring sub-assembly can be directly taken out;

[0019] Secondly, in the present invention, when disassembling, it is only necessary to squeeze the two adjacent second convex plate convex parts of the bottom plate at the same time, so that the second convex plates slide against each other on the third guide rod, so that the second clamping block on the second convex plate can be separated from the clamping groove, and then the semi-ring main assembly part of the sensor can be removed from the bottom plate, so that the sensor can be quickly disassembled and assembled at the bottom plate, and the disassembly process does not require any auxiliary tools, thereby improving the disassembly and maintenance efficiency of the sensor;

[0020] Thirdly, in the present invention, during the process of disassembling the semi-ring main assembly, when the second clamping block and the clamping groove on the second convex plate are separated, the second spring will reset and push the push block connected to the mounting plate upward to lift the entire connecting block. At this time, the user can easily remove the semi-ring main assembly from the base plate, thereby further facilitating the disassembly and use of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is an exploded view of the present invention;

[0023] Figure 3 A bottom view of the connecting block in the present invention;

[0024] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle;

[0025] Figure 5 It is an exploded view of the fixing mechanism in the present invention;

[0026] Figure 6 It is a schematic diagram of the connecting mechanism structure in the present invention;

[0027] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0028] Figure 8 It is a schematic diagram of the ferrule structure in the present invention.

[0029] In the figure: 1, bottom plate; 2, semi-ring main assembly; 3, semi-ring secondary assembly; 4, connecting mechanism; 401, first mounting groove; 402, first spring; 403, first guide rod; 404, first convex plate; 405, first clamping block; 406, connecting seat; 407, second mounting groove; 5, ferrule; 6, terminal; 7, slot; 8, connecting block; 9, fixing mechanism; 901, positioning shell; 902, second convex plate; 903, third Guide rod; 904, third spring; 905, second clamping block; 10, groove; 11, clamping slot; 12, positioning mechanism; 121, insert block; 122, second guide rod; 123, second spring; 124, assembly groove; 125, mounting plate; 126, push block; 13, through hole; 14, second blocking cover; 15, second rectangular hole; 16, first slide groove; 17, first blocking cover; 18, first rectangular hole; 19, second slide groove; 20, sleeve groove. DETAILED DESCRIPTION

[0030] See also Figure 1-Figure 8 In an embodiment of the present invention, an open-loop Hall current sensor includes a semi-ring main assembly 2, a semi-ring sub-assembly 3 and a bottom plate 1, the semi-ring sub-assembly 3 is rotatably connected to the left side of the upper end of the semi-ring main assembly 2, a ferrule 5 is fixedly installed on the right end of the semi-ring sub-assembly 3, the upper right half of the semi-ring main assembly 2 is clamped with the ferrule 5 through a connecting mechanism 4, a wiring terminal 6 is provided on the front of the semi-ring main assembly 2, a connecting block 8 is fixedly connected to the lower end of the semi-ring main assembly 2, a slot 7 is provided at the lower end of the connecting block 8, a positioning mechanism 12 is fixedly installed on the upper end of the bottom plate 1, the connecting block 8 is plugged into the upper end of the positioning mechanism 12 through the slot 7, and the two ends of the connecting block 8 are aligned. A groove 10 is provided, and a card slot 11 is symmetrically provided on the inner side wall of the groove 10, and the bottom plate 1 is connected with the card slot 11 through a fixing mechanism 9; the Hall current sensor also includes a Hall element, a magnetic field guiding structure, a power supply and a signal processing circuit board, etc., wherein when the current passes through the conductor, the magnetic field generated by the Hall element can be detected by the Hall element and converted into a voltage signal, the magnetic field guiding structure can concentrate the magnetic field generated by the current passing through the conductor, thereby increasing the sensor's ability to sense the current, and the power supply and signal processing circuit board can provide the sensor with a certain power supply and a signal processing circuit to amplify, filter and convert the voltage signal output by the Hall element;

[0031] The connecting mechanism 4 includes a connecting seat 406, which is fixedly connected to the right end of the semi-ring main assembly 2. The upper end of the connecting seat 406 is respectively provided with a first mounting groove 401 and a second mounting groove 407. The inner side of the first mounting groove 401 is symmetrically fixedly installed with a first guide rod 403, and the outer side of the first guide rod 403 is slidably connected with a first convex plate 404. The end of the first guide rod 403 close to the first convex plate 404 is sleeved with a first spring 402, and the side of the first convex plate 404 away from the first spring 402 is fixedly installed with a first clamping block 405. The clamping end of the first clamping block 405 is movably extended into the inner side of the second mounting groove 407, and the clamping end of the first clamping block 405 is clamped with the clamping sleeve 5. When disassembling the Hall current sensor, it is necessary to take out the detected wire in the sensor, so the first convex plate 404 can be directly buckled. The convex part makes the first clamping block 405 connected by the first convex plate 404 separate from the ferrule 5, and then after the semi-ring auxiliary assembly 3 is flipped over on the semi-ring main assembly 2, the wire between the semi-ring main assembly 2 and the semi-ring auxiliary assembly 3 can be directly taken out. On the contrary, after the sensor is installed, the wire is placed in the semi-ring main assembly 2, and the semi-ring auxiliary assembly 3 is flipped so that the ferrule 5 is squeezed with the snap-in end of the first clamping block 405 under the closing force. At the same time, the first convex plate 404 connected to the first clamping block 405 compresses the first spring 402. When the snap-in end of the first clamping block 405 corresponds to the sleeve groove 20 of the ferrule 5, the first spring 402 is reset to push the first clamping block 405 connected by the first convex plate 404 to snap into it and fix it, so that the semi-ring main assembly 2 and the semi-ring auxiliary assembly 3 can be quickly connected and used;

[0032] The fixing mechanism 9 includes a positioning shell 901, which is symmetrically fixedly mounted on the upper end of the base plate 1, and the positioning shell 901 is plugged into the inner side of the groove 10. A third guide rod 903 is symmetrically fixedly mounted on the inner side of the positioning shell 901, and a second convex plate 902 is symmetrically slidably connected to the outer side of the third guide rod 903. A third spring 904 is symmetrically fixedly mounted between the second convex plates 902. One end of the third guide rod 903 passes through the middle of the third spring 904, and a second clamping block 905 is fixedly mounted on the side of the second convex plate 902 away from the third spring 904. The snap-in end of the second clamping block 905 movably passes through the shell wall of the positioning shell 901 and is snap-fitted with the clamping groove 11. When the sensor is maintained and disassembled, the groove 10 at the end of the semi-ring main assembly 2 is plugged into the positioning shell 901. During the insertion process, the lower end wall edge of the groove 10 squeezes the inclined surface of the snap-in end of the second clamping block 905. The second convex plate 902 connected to the second clamping block 905 is pressed so that the second convex plate 902 slides close to each other and compresses the third spring 904. When the snap-in end of the second clamping block 905 corresponds to the snap-in groove 11 of the inner wall of the groove 10, the third spring 904 is reset and simultaneously pushes the two second convex plates 902 to slide away from each other on the third guide rod 903. At the same time, the snap-in end of the second clamping block 905 connected to the second convex plate 902 is snapped into the snap-in groove 11 of the inner wall of the groove 10 to fix it. When disassembling, it is only necessary to squeeze the two adjacent convex parts of the second convex plate 902 of the bottom plate 1 at the same time so that the second convex plate 902 slides on the third guide rod 903. The second clamping block 905 on the second convex plate 902 can be separated from the snap-in groove 11, and then the semi-ring main assembly 2 of the sensor can be removed from the bottom plate 1, so that the sensor can be quickly disassembled and used at the bottom plate 1.

[0033] The positioning mechanism 12 includes an insert block 121, which is fixedly connected to the upper end of the base plate 1. The base plate 1 is plugged into the insert block 121 and the slot 7. The outer sides of the ends of the insert block 121 are provided with assembly grooves 124. The inner sides of the assembly grooves 124 are symmetrically fixedly installed with second guide rods 122. The outer sides of the second guide rods 122 are slidably connected with the same mounting plate 125. A second spring 123 is fixedly installed between the mounting plate 125 and the assembly groove 124. One end of the second guide rod 122 passes through the middle of the second spring 123. A push block 126 is fixedly installed on the upper end of the mounting plate 125. The end of the push block 126 away from the mounting plate 125 slides through the top inner wall of the assembly groove 124. The push block 126 is connected to the groove 10 of the connecting block 8 and the positioning shell During the plugging process of 901, the slot 7 at the lower end of the connecting block 8 is plugged into the plug block 121 on the base plate 1, and at the same time, the slot 7 of the connecting block 8 squeezes the protruding push block 126 on the plug block 121, so that the mounting plate 125 connected to the push block 126 slides on the second guide rod 122 of the assembly groove 124 to compress the second spring 123. During the disassembly of the semi-ring main assembly 2, when the second clamping block 905 on the second protruding plate 902 is separated from the clamping groove 11, the second spring 123 will reset and push the push block 126 connected to the mounting plate 125 upward to lift the entire connecting block 8. At this time, it is convenient for the user to remove the semi-ring main assembly 2 from the base plate 1, thereby further facilitating the disassembly and use of the sensor.

[0034] See also Figure 7 and Figure 8 A sleeve groove 20 is provided on one side of the ferrule 5 facing the card block, and the ferrule 5 is clamped with the card-in end of the first card block 405 through the sleeve groove 20. A first sliding groove 16 is symmetrically provided on the inner side of the first mounting groove 401. The end of the first protruding plate 404 is slidably connected to the inner side of the first mounting groove 401. The sleeve groove 20 of the ferrule 5 can be conveniently clamped and fixed with the card-in end of the first card block 405, and the end of the first protruding plate 404 slides at the first sliding groove 16 in the first mounting groove 401, which can improve the stability of the movement of the first protruding plate 404.

[0035] See also Figure 7 A first blocking cover 17 is fixedly installed at the notch of the first mounting groove 401, and a first rectangular hole 18 is opened on the inner side of the first blocking cover 17. The convex part of the first convex plate 404 movably passes through the first rectangular hole 18. The convex plate of the first convex plate 404 passes through the first rectangular hole 18 on the first blocking cover 17, so as to facilitate the movable limiting operation of the first convex plate 404. At the same time, the first blocking cover 17 covers the notch of the first mounting groove 401, which can protect the movable parts inside the first mounting groove 401 to a certain extent.

[0036] See also Figure 5A second slide groove 19 is symmetrically provided on the inner side of the positioning shell 901, and the end of the second convex plate 902 is slidably connected to the inner side of the second slide groove 19. By using the second convex plate 902 to slide in the second slide groove 19 of the positioning shell 901, the stability of the movement of the second convex plate 902 can be improved. A second blocking cover 14 is fixedly installed at the shell opening of the positioning shell 901, and a second rectangular hole 15 is symmetrically provided on the inner side of the second blocking cover 14. The convex parts of the second convex plate 902 can be movably penetrated through the second rectangular hole 15 of the second blocking cover 14. The convex parts of the second convex plate 902 are movably penetrated through the second rectangular hole 15 of the second blocking cover 14, which can facilitate the movable limiting operation of the second convex plate 902. At the same time, the second blocking cover 14 can also protect the movable parts inside the positioning shell 901 to a certain extent.

[0037] See also Figure 4 A through hole 13 is provided on the top inner wall of the assembly groove 124, and the upper end of the push block 126 slides through the through hole 13. The shape and specification of the plug block 121 are adapted to the slot 7. The assembly groove 124 is provided on the side of the end of the plug block 121 facing the positioning shell 901. The push block 126 is used to movably penetrate the through hole 13 on the assembly groove 124, so that the push block 126 can easily lift the connecting block 8. At the same time, the shapes and specifications of the plug block 121 and the slot 7 are adapted, so that when disassembly is convenient, the push block 126 contacts with the slot 7 of the connecting block 8 and lifts the connecting block 8.

[0038] The working principle of the present invention is: during use, when the Hall current sensor is disassembled, the wire detected in the sensor needs to be taken out, so the convex part of the first convex plate 404 can be directly pressed to separate the first clamping block 405 connected to the first convex plate 404 from the clamping sleeve 5, and then the semi-ring auxiliary assembly 3 is flipped over on the semi-ring main assembly 2, so that the wire between the semi-ring main assembly 2 and the semi-ring auxiliary assembly 3 can be directly taken out, on the contrary, after the sensor is installed, the wire is placed in the semi-ring main assembly 2, and the semi-ring auxiliary assembly 3 is flipped so that the clamping sleeve 5 is squeezed with the clamping end of the first clamping block 405 under the closing force, and at the same time, the first convex plate 404 connected to the first clamping block 405 compresses the first spring 402, and when the clamping end of the first clamping block 405 corresponds to the sleeve groove 20 of the clamping sleeve 5, the first spring 402 is reset to push the first clamping block 405 connected to the first convex plate 404 to be clamped therein and fixed;

[0039] When the sensor is maintained and disassembled, the groove 10 at the end of the semi-ring main assembly 2 is plugged into the positioning shell 901. During the insertion process, the lower end wall of the groove 10 squeezes the inclined surface of the second clamping block 905, so that the second convex plates 902 connected to the second clamping block 905 slide close to each other and compress the third spring 904. When the clamping end of the second clamping block 905 corresponds to the clamping groove 11 on the inner wall of the groove 10, the third spring 904 is reset and simultaneously pushes the two second convex plates 902 on the third guide rod 903, and the second clamping block 905 connected to the second convex plate 902 is clamped into the clamping groove 11 on the inner wall of the groove 10 to fix it. When disassembling, it is only necessary to squeeze the two adjacent convex parts of the second convex plates 902 on the bottom plate 1 at the same time, so that the second convex plates 902 slide on the third guide rod 903, so that the second clamping block 905 on the second convex plate 902 can be separated from the clamping groove 11, and then the semi-ring main assembly 2 of the sensor can be removed from the bottom plate 1;

[0040] During the process of plugging the groove 10 of the connecting block 8 and the positioning shell 901, the slot 7 at the lower end of the connecting block 8 and the plug block 121 on the base plate 1 are plugged, and at the same time, the slot 7 of the connecting block 8 squeezes the protruding push block 126 on the plug block 121, so that the mounting plate 125 connected to the push block 126 slides on the second guide rod 122 of the assembly groove 124 to compress the second spring 123. During the process of disassembling the semi-ring main assembly 2, when the second clamping block 905 on the second protruding plate 902 is separated from the clamping groove 11, the second spring 123 will reset and push the push block 126 connected to the mounting plate 125 upward to lift the entire connecting block 8. At this time, the user can conveniently remove the semi-ring main assembly 2 from the base plate 1.

Claims

1. An open-loop Hall current sensor, characterized in that: It comprises a semi-ring main assembly, a semi-ring sub-assembly and a bottom plate, wherein the semi-ring sub-assembly is rotatably connected to the left side of the upper end of the semi-ring main assembly, a ferrule is fixedly installed on the right end of the semi-ring sub-assembly, the upper right half of the semi-ring main assembly is clamped with the ferrule through a connecting mechanism, a wiring terminal is provided on the front of the semi-ring main assembly, a connecting block is fixedly connected to the lower end of the semi-ring main assembly, a slot is provided at the lower end of the connecting block, a positioning mechanism is fixedly installed on the upper end of the bottom plate, the connecting block is plugged into the upper end of the positioning mechanism through the slot, grooves are symmetrically provided at both ends of the connecting block, and clamping grooves are symmetrically provided on the inner side wall of the groove, and the bottom plate is clamped with the clamping groove through a fixing mechanism; The connecting mechanism includes a connecting seat, the connecting seat is fixedly connected to the right end of the semi-ring main assembly, the upper end of the connecting seat is respectively provided with a first mounting groove and a second mounting groove, the inner side of the first mounting groove is symmetrically fixedly installed with a first guide rod, the outer side of the first guide rod is slidably connected with a first convex plate, the end of the first guide rod close to the first convex plate is sleeved with a first spring, the side of the first convex plate away from the first spring is fixedly provided with a first clamping block, the clamping end of the first clamping block is movably extended into the inner side of the second mounting groove, and the clamping end of the first clamping block is clamped with the clamping sleeve; The fixing mechanism includes a positioning shell, which is symmetrically fixedly installed on the upper end of the bottom plate, and the positioning shell is inserted into the inner side of the groove. A third guide rod is symmetrically fixedly installed on the inner side of the positioning shell, and a second convex plate is symmetrically slidably connected to the outer side of the third guide rod. A third spring is symmetrically fixedly installed between the second convex plates, one end of the third guide rod passes through the middle part of the third spring, and a second clamping block is fixedly installed on the side of the second convex plate away from the third spring, and the clamping end of the second clamping block movably passes through the shell wall of the positioning shell and is clamped in the clamping groove.

2. An open-loop Hall current sensor according to claim 1, characterized in that: A sleeve groove is provided on one side of the clamping sleeve facing the clamping block, and the clamping sleeve is clamped with the clamping end of the first clamping block through the sleeve groove.

3. An open-loop Hall current sensor according to claim 1, characterized in that: A first sliding groove is symmetrically provided on the inner side of the first installation groove, and an end portion of the first protruding plate is slidably connected to the inner side of the first installation groove.

4. An open-loop Hall current sensor according to claim 1, characterized in that: A first blocking cover is fixedly installed at the notch of the first mounting slot, a first rectangular hole is opened on the inner side of the first blocking cover, and the convex portion of the first convex plate movably passes through the first rectangular hole.

5. An open-loop Hall current sensor according to claim 1, characterized in that: A second sliding groove is symmetrically provided on the inner side of the positioning shell, and the end of the second protruding plate is slidably connected to the inner side of the second sliding groove.

6. An open-loop Hall current sensor according to claim 1, characterized in that: A second blocking cover is fixedly installed at the shell opening of the positioning shell, and a second rectangular hole is symmetrically opened on the inner side of the second blocking cover, and the convex parts of the second convex plate are movable through the second rectangular hole.

7. An open-loop Hall current sensor according to claim 1, characterized in that: The positioning mechanism includes an insert block, which is fixedly connected to the upper end of the base plate, and the base plate is plugged in through the insert block and the slot. Assembly grooves are provided on the outer sides of the ends of the insert block, and a second guide rod is symmetrically fixedly installed on the inner side of the assembly groove. The outer side of the second guide rod is slidably connected to the same mounting plate, and a second spring is fixedly installed between the mounting plate and the assembly groove, one end of the second guide rod passes through the middle part of the second spring, and a push block is fixedly installed on the upper end of the mounting plate, and the end of the push block away from the mounting plate slides through the top inner wall of the assembly groove.

8. An open-loop Hall current sensor according to claim 7, characterized in that: A through hole is formed on the top inner wall of the assembly groove, and the upper end of the push block slides through the through hole.

9. An open-loop Hall current sensor according to claim 7, characterized in that: The shape and specification of the plug block are matched with the slot, and the assembly slot is arranged on a side of the end of the plug block facing the positioning shell.

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