A high-precision current sensor

Abstract

The embodiment of the present application provides a high-precision current sensor, which relates to the technical field of current sensors. A high-precision current sensor includes a mounting seat, the top of which is clamped with a base, and the mounting seat is fixedly connected with support plates all around, and the support plates are fixedly connected on the side away from the mounting seat by bolts; the top of the base is fixedly connected with a shell, and a detection hole for wire current detection is reserved at the center of the shell; both sides of the bottom of the base are provided with locking components that are clamped with the mounting seat, and the locking components include a hidden groove provided at the center of the back of the base, and the front and rear sides of the shell near the detection hole are provided with protective components. Based on the rapid disassembly and assembly, a double shielding protection effect is achieved for the detection area between the current sensor and the wire to be detected, effectively improving the detection accuracy of the current sensor on the wire to be detected.

Description

Technical Field

[0001] The invention belongs to the technical field of current sensors, and in particular relates to a high-precision current sensor. Background Art

[0002] A current sensor is a detection device that can sense the information of the measured current and convert the sensed information into an electrical signal or other required form of information output that meets certain standards according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control. Current sensors are also called magnetic sensors and can be used in household appliances, smart grids, electric vehicles, wind power generation, etc. There are many magnetic sensors used in our lives, such as computer hard drives, compasses, household appliances, etc.

[0003] In the prior art (a patent application with publication number CN220064209U and patent name current sensor), a limit structure is used to accommodate the wire to be tested and fix the relative position of the wire to be tested and the detection channel, and the wire to be tested is fixed by setting a limit component, which solves the problem of the wire to be tested moving randomly in the detection channel. It has the advantage of high accuracy in detecting the current condition of the wire to be tested. In the process of implementing this technical solution, it is found that there are at least the following problems in the prior art.

[0004] When the current sensor performs current Hall detection on the wire, the wire to be detected is first passed through the reserved detection hole area of ​​the current sensor. During this process, it is easy to cause interference in the detection area between the current sensor and the wire to be detected due to the influence of external electromagnetic waves, temperature and humidity, etc., resulting in reduced detection accuracy of the current sensor. It is necessary to repeat the detection multiple times, which is not worth the loss. Summary of the invention

[0005] The present application aims to at least solve one of the technical problems in the prior art that the detection area between the current sensor and the wire to be detected cannot be shielded and protected based on quick disassembly and assembly, thereby reducing the detection accuracy of the current sensor on the wire to be detected. To this end, the present application proposes a high-precision current sensor.

[0006] To achieve the above purpose, the specific technical solutions of the present invention are as follows:

[0007] A high-precision current sensor comprises a mounting seat, wherein the top of the mounting seat is clamped with a base, and the mounting seat is fixedly connected with support plates around the mounting seat, and the side of the support plate away from the mounting seat is fixedly connected by bolts;

[0008] The top of the base is fixedly connected with a shell, and a detection hole for wire current detection is reserved at the center of the shell;

[0009] Both sides of the bottom of the base are provided with locking components that are engaged with the mounting seat, and the locking components include a hidden groove opened at the center of the back side of the base. Both the front and rear sides of the shell near the detection hole are provided with protective components.

[0010] Preferably: locking slots are provided on both sides of the mounting seat, and the inner cavity of the hidden groove is rotatably connected to a rotating head, the front side of the rotating head is fixedly connected to a main bevel gear, and the front side of the main bevel gear is meshed with a secondary bevel gear, the inner cavity of the secondary bevel gear is fixedly connected to a forward and reverse threaded rod that rotatably cooperates with the base, and both sides of the forward and reverse threaded rods are threadedly connected to threaded sleeves, the bottom of the threaded sleeve is fixedly connected to a connecting piece, and the bottom of the connecting piece is fixedly connected to a locking seat that engages with the locking slot.

[0011] Preferably: the protective component includes a bent arm fixed on the front and rear sides of the locking socket, and a protective cover is fixedly connected to the side of the bent arm away from the locking socket, a shielding outer layer and a shielding inner layer are sequentially arranged on the protective cover from the outside to the inside, and a sealing head is fixedly connected to the inner side of the protective cover for sealing the edge of the detection hole, a restraining head is fixedly connected to the outer side of the protective cover, and a docking groove is provided on the opposite side of the protective cover, and a docking protrusion is fixedly connected to the other side of the protective cover for snapping into the docking groove.

[0012] Preferably, a twisting groove is provided on the back of the rotating head, and the twisting groove is designed in a hexagonal shape, and the rotating head is located on the inner side of the hidden groove.

[0013] Preferably, a blocking cover is fixedly connected to one side of the base close to the hidden groove by bolts, and a limiting head which is snap-fitted with the twisting groove is fixedly connected to the front side of the blocking cover.

[0014] Preferably, through grooves are provided on both sides of the bottom of the base, and sliding openings that slidably cooperate with the through grooves are provided on both sides of the connecting piece.

[0015] Preferably, the protective cover, the plugging head and the restraining head are all designed in a semicircular shape, and a semicircular chamfered groove which is snap-fitted with the detection hole is provided on the inner side of the plugging head.

[0016] Preferably, a wire insertion hole communicating with the detection hole is provided at the center of the outer side of the binding head, and a semicircular chamfer is provided at the outer end of the wire insertion hole.

[0017] Preferably, the binding head is made of a highly elastic material, and arc chamfers are provided on both sides of the butt joint groove and the butt joint protrusion facing each other.

[0018] Preferably, positioning grooves are provided on both the front and rear sides of the base close to the through groove, and positioning protrusions that are engaged with the positioning grooves are fixedly connected to both the front and rear sides of the top of the mounting seat.

[0019] A high-precision current sensor of the present invention has the following advantages:

[0020] 1. This high-precision current sensor, during the current sensor performing current Hall detection on the wire, first the rotating head is engaged through the meshing transmission between the main bevel gear and the auxiliary bevel gear, and the positive and negative threaded rods and the threaded transmission of the two sets of threaded sleeves are coordinated, and then the two sets of connecting parts drive the two sets of locking card seats to be inserted into the locking card slots on the mounting seat, so as to achieve the effect of rapid disassembly and assembly of the mounting seat and the base, which is conducive to the rapid installation of the shell. When the current sensor fails, it is also convenient to quickly remove the shell, which plays a role in facilitating maintenance.

[0021] 2. This high-precision current sensor, then, has two sets of locking sockets driving two sets of protective covers to move inward synchronously through two sets of front and rear bent arms, so as to protect the wire to be detected passing through the detection hole reserved on the shell. At the same time, the shielding outer layer and the shielding inner layer play a double shielding protection role for the wire to be detected in the closed protection state, so as to prevent external electromagnetic wave factors from interfering with the detection area between the current sensor and the wire to be detected, thereby improving the detection accuracy of the current sensor on the wire to be detected.

[0022] 3. This is a high-precision current sensor. At the same time, the front and rear two sets of protective covers drive the two sets of blocking heads and binding heads to move inward synchronously and fit together, and the docking grooves and docking protrusions cooperate with the front and rear two sets of protective covers to dock and clamp them, so that the detection area between the current sensor and the wire to be detected is completely closed and blocked to prevent the external temperature and humidity environment from interfering with the detection area between the current sensor and the wire to be detected, thereby further improving the detection accuracy of the current sensor on the wire to be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a diagram showing the initial state of a high-precision current sensor structure of the present invention;

[0025] Figure 2 A bottom view of the initial state of a high-precision current sensor structure of the present invention;

[0026] Figure 3 A structural working state diagram of a high-precision current sensor of the present invention;

[0027] Figure 4A bottom view of a high-precision current sensor structure in working state according to the present invention;

[0028] Figure 5 A partial bottom view of a high-precision current sensor structure of the present invention;

[0029] Figure 6 It is a rear view of the locking assembly structure of the present invention;

[0030] Figure 7 It is a front view of the mounting seat and locking assembly structure of the present invention;

[0031] Figure 8 A bottom view of the locking assembly and the protection assembly structure of the present invention;

[0032] Fig. 9 It is a rear view of the locking assembly and the protection assembly structure of the present invention;

[0033] Fig.10 It is a partial left view of the locking assembly and the protection assembly structure of the present invention;

[0034] Fig.11 It is a partial right view of the locking assembly and the protection assembly structure of the present invention;

[0035] Fig.12 It is a side cross-sectional view of the protective cover and plugging head structure of the present invention;

[0036] Fig.13 It is a bottom view of the wire plug interface, locking assembly and anti-drop assembly structure of the present invention;

[0037] Fig.14 It is a front view of the structure of the wire plug interface, locking assembly and anti-drop assembly of the present invention;

[0038] Fig.15 This is an exploded view of the wiring interface and the anti-dropping assembly structure of the present invention;

[0039] Fig.16 It is a bottom exploded view of the base, housing, wire plug interface and wiring harness plug structure of the present invention;

[0040] Fig.17 It is a top exploded view of the mounting seat structure of the present invention.

[0041] Explanation of the markings in the figure: 1. Mounting seat; 2. Base; 3. Shell; 4. Detection hole; 5. Locking assembly; 51. Locking slot; 52. Turning head; 53. Main bevel gear; 54. Sub bevel gear; 55. Positive and negative threaded rod; 56. Threaded sleeve; 57. Connector; 58. Locking seat; 6. Protection assembly; 61. Bend arm; 62. Protection cover; 63. Shielding outer layer; 64. Shielding inner layer; 65. Blocking head; 66. Constraint head; 67. Docking groove; 68. Docking protrusion; 7. Plug interface; 8. Anti-slip assembly; 81. Wiring harness plug; 82. Pinching ear seat; 83. Positioning slot; 84. Sliding sleeve; 85. Sliding rod; 86. Limiting spring; 87. Positioning cap; 88. Positioning head; 9. Positioning groove; 10. Positioning protrusion; 11. Through slot; 12. Blocking cover. DETAILED DESCRIPTION

[0042] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0043] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0046] The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0047] like Figure 1-Figure 17 As shown, a high-precision current sensor of the present invention comprises a mounting seat 1, a base 2 is clamped on the top of the mounting seat 1, and support plates are fixedly connected to the four sides of the mounting seat 1, and the support plates are fixedly connected to the side away from the mounting seat 1 by bolts, and the top of the base 2 is fixedly connected to a shell 3, and a detection hole 4 for wire current detection is reserved at the center of the shell 3, and positioning grooves 9 are provided on the front and rear sides of the base 2 close to the through groove 11, and positioning protrusions 10 clamped with the positioning grooves 9 are fixedly connected on the front and rear sides of the top of the mounting seat 1. After the mounting seat 1 is fixed, it is convenient to clamp and position the base 2 on the mounting seat 1 in advance, which provides convenience for the subsequent installation of the current sensor;

[0048] Both sides of the bottom of the base 2 are provided with locking components 5 that are snap-fitted with the mounting base 1, and the locking component 5 includes a hidden groove opened at the center of the back side of the base 2, so as to achieve the quick disassembly and assembly effect of the mounting base 1 and the base 2, which is conducive to the quick installation of the shell 3. When the current sensor fails, it is also convenient to quickly remove the shell 3, which plays a role in facilitating maintenance. The front and rear sides of the shell 3 near the detection hole 4 are provided with protective components 6 to prevent the external temperature and humidity environment from interfering with the detection area between the current sensor and the wire to be detected, thereby effectively improving the detection accuracy of the current sensor on the wire to be detected.

[0049] like Figure 6-Figure 12 As shown, locking grooves 51 are provided on both sides of the mounting base 1, and a rotating head 52 is rotatably connected to the inner cavity of the hidden groove, a main bevel gear 53 is fixedly connected to the front of the rotating head 52, and a secondary bevel gear 54 is meshed with the front side of the main bevel gear 53, and the inner cavity of the secondary bevel gear 54 is firstly connected to the positive and negative threaded rods 55 that are rotatably matched with the base 2 by the rotating head 52 through the meshing transmission between the main bevel gear 53 and the secondary bevel gear 54, and the inner cavity of the secondary bevel gear 54 is fixedly connected to the inner cavity of the secondary bevel gear 54, and the positive and negative threaded rods 55 are threadedly connected to the threaded sleeves 56 on both sides, and the threaded transmission of the positive and negative threaded rods 55 and the two groups of threaded sleeves 56 is matched, and the bottom of the threaded sleeve 56 is fixedly connected to a connecting piece 57, and the bottom of the connecting piece 57 is fixedly connected to a locking seat 58 that is engaged with the locking groove 51, and then the two groups of connecting pieces 57 drive the two groups of locking seats 58 to be inserted into the locking groove 51 on the mounting base 1, so as to achieve the effect of rapid disassembly and assembly of the mounting base 1 and the base 2;

[0050] A screwing groove is provided on the back of the rotating head 52, and the screwing groove is designed in the shape of a hexagon. The rotating head 52 is located on the inner side of the hidden groove, which is convenient for using a hexagonal wrench to be inserted into the screwing groove to rotate the rotating head 52 clockwise or counterclockwise. A sealing cover 12 is fixedly connected to the side of the base 2 close to the hidden groove by bolts, and a limit head that is snap-fitted with the screwing groove is fixedly connected to the front side of the sealing cover 12, so that the rotating head 52 and the hidden groove are dust-proof and sealed. Through grooves 11 are provided on both sides of the bottom of the base 2, and sliding openings that are slidably matched with the through grooves 11 are provided on both sides of the connecting piece 57, which play a role of sliding limit for the connecting piece 57 and improve the displacement stability of the threaded sleeve 56 and the connecting piece 57.

[0051] The protection component 6 includes a bent arm 61 fixed on the front and rear sides of the locking card seat 58, and a protective cover 62 is fixedly connected to the side of the bent arm 61 away from the locking card seat 58. The two groups of locking card seats 58 drive the two groups of protective covers 62 to move synchronously inward through the two groups of bent arms 61 in front and behind, so as to protect the wire to be detected passing through the detection hole 4 reserved on the shell 3. The protective cover 62 is provided with a shielding outer layer 63 and a shielding inner layer 64 from the outside to the inside. The shielding outer layer 63 and the shielding inner layer 64 play a double shielding protection role for the wire to be detected in the closed protection state, so as to prevent external electromagnetic wave factors from interfering with the detection area between the current sensor and the wire to be detected, thereby improving the detection accuracy of the current sensor on the wire to be detected.

[0052] The inner side of the protective cover 62 is fixedly connected with a plugging head 65 that is matched with the edge of the detection hole 4, and the outer side of the protective cover 62 is fixedly connected with a binding head 66. The front and rear sets of protective covers 62 drive the two sets of plugging heads 65 and the binding head 66 to move inward synchronously and fit together. A docking groove 67 is provided on the opposite side of the protective cover 62, and a docking protrusion 68 that is matched with the docking groove 67 is fixedly connected on the other side of the protective cover 62. The docking groove 67 and the docking protrusion 68 play a docking and clamping role for the front and rear sets of protective covers 62. The detection area between the current sensor and the wire to be detected is completely closed and blocked to prevent the external temperature and humidity environment from interfering with the detection area between the current sensor and the wire to be detected, thereby further improving the detection accuracy of the current sensor on the wire to be detected.

[0053] The protective cover 62, the plugging head 65 and the binding head 66 are all designed in a semicircular shape, and the inner side of the plugging head 65 is provided with a semicircular chamfered groove which is snap-fitted with the detection hole 4, so as to improve the sealing performance between the plugging head 65 and the detection hole 4. A wire insertion hole which is connected and matched with the detection hole 4 is provided at the center of the outer side of the binding head 66, and a semicircular chamfer is provided at the outer end of the wire insertion hole, so as to quickly insert and effectively block the detection wire. The binding head 66 is made of a highly elastic material, so as to improve the tightness of the binding head 66 on the head and tail ends of the detection wire, and is also suitable for the blocking work of wires of different thicknesses, and arc chamfers are provided on both sides facing the docking groove 67 and the docking protrusion 68, so as to improve the docking smoothness between the docking groove 67 and the docking protrusion 68.

[0054] like Figure 13-Figure 15 As shown, before the current sensor performs current Hall detection on the wire, it is necessary to insert the external wiring harness plug 81 into the wiring interface 7 on the housing 3 to provide signal and power supply for the current sensor to detect the wire to be detected. Under the action of external force, it is easy to cause the wiring harness plug 81 to loosen from the wiring interface 7 or even fall off, causing poor contact of the current sensor or even direct power failure and stop working. The housing 3 is fixedly connected to the wiring interface 7 by bolts near the center of the base 2, and the wiring interface 7 is provided with an anti-detachment component 8, which includes a wiring harness plug 81 inserted in the wiring interface 7. After the wiring harness plug 81 is inserted in the wiring interface 7, it provides a signal and power supply for the current sensor.

[0055] The upper and lower sides of the wiring harness plug 81 are fixedly connected with ear-pinching seats 82, which is convenient for pinching and plugging the wiring harness plug 81. Positioning grooves 83 are provided on both sides of the inner cavity of the ear-pinching seat 82, and the two groups of bent arms 61 on the front side are fixedly connected with a sliding sleeve 84 on the side close to the protective cover 62. The inner cavity of the sliding sleeve 84 is slidably connected with a sliding rod 85, and the outer surface of the sliding rod 85 is sleeved with a limiting spring 86 fixedly matched with the sliding sleeve 84. The two groups of bent arms 61 on the front side drive the sliding rod 85 to move synchronously inward through the sliding sleeve 84. The inner side of the sliding rod 85 is fixedly connected with a positioning cap 87 that is snap-fitted with the ear-pinching seat 82, and the inner side of the positioning cap 87 is fixedly connected with a positioning head 88 that is snap-fitted with the positioning groove 83. The two groups of sliding rods 85 drive the two groups of positioning caps 87 and the positioning head 88 to be synchronously snapped into the ear-pinching seat 82 and the positioning groove 83, so as to achieve the limiting and anti-detachment effect of the wiring harness plug 81.

[0056] A working principle of a high-precision current sensor: first, fix the mounting base 1 at the mounting position by means of a support plate and bolts, then clamp the positioning groove 9 at the bottom of the housing 3 onto the two groups of positioning protrusions 10 on the mounting base 1, and pass the wire to be detected through the plugging head 65, the protective cover 62 and the binding head 66 in the open state and through the detection hole 4, and then insert the hexagonal wrench into the screwing groove of the rotating head 52 and rotate it, the rotating head 52 drives the secondary bevel gear 54 on the main bevel gear 53 to rotate clockwise, the secondary bevel gear 54 drives the positive and negative threaded rod 55 to rotate forwardly, the positive and negative threaded rod 55 drives the two groups of threaded sleeves 56 to move synchronously inward, the two groups of threaded sleeves 56 drive the two groups of connecting pieces 57 to move synchronously inward in the through groove 11, the two groups of connecting pieces 57 drive the two groups of locking card seats 58 to be clamped into the two groups of locking card slots 51 on the mounting base 1, and after the base 2 and the mounting base 1 are quickly clamped, the rapid installation of the current sensor is completed;

[0057] While the two groups of connecting pieces 57 drive the two groups of locking card seats 58 to move inward synchronously, the two groups of docking grooves 67 and docking protrusions 68 dock the two groups of protective covers 62. The two groups of locking card seats 58 drive the two groups of semicircular protective covers 62, the blocking heads 65 and the binding heads 66 to be synchronously clamped on the wires to be detected through the two groups of bent arms 61, and the reserved detection holes 4 on the shell 3 are blocked. The binding heads 66 elastically tighten the wires of different thicknesses to prevent the external temperature and humidity from penetrating therein and affecting the current sensor's current detection work on the wires to be detected. At the same time, the shielding outer layer 63 and the shielding inner layer 64 perform double electromagnetic shielding protection on the wire area to be detected of the protective cover 62 to prevent external electromagnetic waves from interfering with the current sensor's current detection work on the wires to be detected.

[0058] Prior to this, first pinch the ear seat 82 to insert the external wiring harness plug 81 into the reserved wiring interface 7 on the housing 3 in advance, and then the two sets of locking seats 58 drive the two sets of bent arms 61 to move inward synchronously. At the same time, the two sets of bent arms 61 located on the front side drive the two sets of slide bars 85 to move inward synchronously through the two sets of sliding sleeves 84. With the two sets of limit springs 86 acting as elastic limiters on the two sets of slide bars 85, the two sets of slide bars 85 drive the two sets of positioning caps 87 to move inward synchronously and clamp to the two ends of the two sets of ear seats 82. At the same time, the two sets of sliding rods 85 also drive the positioning heads 88 to be inserted into the positioning grooves 83 in the two sets of ear-pinching seats 82. After completing the limit and anti-detachment work between the wiring harness plug 81 and the wiring interface 7, the blocking cover 12 is fixed to the hidden groove on the back of the shell 3 by bolts and blocked. The limit head on the blocking cover 12 is correspondingly stuck in the twisting groove in the rotating head 52, providing reverse restriction for the rotating head 52 tightened in place, thereby completing the rapid installation of the current sensor and the high-precision detection of the conductor to be detected.

[0059] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-precision current sensor, comprising a mounting base (1), characterized in that: The top of the mounting seat (1) is clamped with a base (2), and the mounting seat (1) is fixedly connected with support plates on all four sides, and the side of the support plates away from the mounting seat (1) is fixedly connected by bolts; The top of the base (2) is fixedly connected to a housing (3), and a detection hole (4) for detecting the current of the conductor is reserved at the center of the housing (3); Both sides of the bottom of the base (2) are provided with locking assemblies (5) that are snap-fitted with the mounting seat (1), both sides of the mounting seat (1) are provided with locking slots (51), and the inner cavity of the hidden slot is rotatably connected to a rotating head (52), the front of the rotating head (52) is fixedly connected to a main bevel gear (53), and the front side of the main bevel gear (53) is meshed with a secondary bevel gear (54), the inner cavity of the secondary bevel gear (54) is fixedly connected to a positive and negative threaded rod (55) that is rotatably matched with the base (2), and both sides of the positive and negative threaded rod (55) are threadedly connected to threaded sleeves (56), the bottom of the threaded sleeve (56) is fixedly connected to a connecting piece (57), and the bottom of the connecting piece (57) is fixedly connected to a locking seat (58) that is snap-fitted with the locking slot (51), and the locking assembly (5) comprises a locking seat (58) that is snap-fitted with the locking slot (51) and is provided on the base (2). a hidden groove at the center of the back side, the housing (3) being provided with a protective assembly (6) on both the front and rear sides close to the detection hole (4), the protective assembly (6) comprising a bent arm (61) fixed to the front and rear sides of the locking card seat (58), and a protective cover (62) being fixedly connected to the side of the bent arm (61) away from the locking card seat (58), the protective cover (62) being provided with a shielding outer layer (63) and a shielding inner layer (64) in sequence from the outside to the inside, and a blocking head (65) being fixedly connected to the inner side of the protective cover (62) for blocking the edge of the detection hole (4), a restraining head (66) being fixedly connected to the outer side of the protective cover (62), and a docking groove (67) being provided on one side of the protective cover (62) facing the other side, and a docking protrusion (68) being fixedly connected to the docking groove (67) for engaging with the docking groove (67); The housing (3) is fixedly connected to a wiring interface (7) at a center thereof near the base (2) by means of bolts, and an anti-detachment component (8) is provided on the wiring interface (7), the anti-detachment component (8) comprising a wiring harness plug (81) inserted into the wiring harness plug (7), and an ear-pinching seat (82) is fixedly connected to the upper and lower sides of the wiring harness plug (81), both sides of the inner cavity of the ear-pinching seat (82) are provided with positioning grooves (83), and a sliding sleeve (84) is fixedly connected to one side of the two groups of bent arms (61) located at the front side near the protective cover (62), the inner cavity of the sliding sleeve (84) is slidably connected to a sliding rod (85), and the outer surface of the sliding rod (85) is sleeved with a limit spring (86) fixedly matched with the sliding sleeve (84), the inner side of the sliding rod (85) is fixedly connected to a positioning cap (87) engaged with the ear-pinching seat (82), and the inner side of the positioning cap (87) is fixedly connected to a positioning head (88) engaged with the positioning groove (83).

2. A high-precision current sensor according to claim 1, characterized in that: The back of the rotating head (52) is provided with a twisting groove, and the twisting groove is designed in a hexagonal shape, and the rotating head (52) is located on the inner side of the hidden groove.

3. A high-precision current sensor according to claim 2, characterized in that: A blocking cover (12) is fixedly connected to a side of the base (2) close to the hidden groove via bolts, and a limiting head that engages with the twisting groove is fixedly connected to the front side of the blocking cover (12).

4. A high-precision current sensor according to claim 3, characterized in that: Through grooves (11) are provided on both sides of the bottom of the base (2), and sliding openings that slidably cooperate with the through grooves (11) are provided on both sides of the connecting piece (57).

5. A high-precision current sensor according to claim 4, characterized in that: The protective cover (62), the plugging head (65) and the restraining head (66) are all of semicircular design, and a semicircular chamfered groove for snap-fitting with the detection hole (4) is provided on the inner side of the plugging head (65).

6. A high-precision current sensor according to claim 5, characterized in that: A wire insertion hole communicating with the detection hole (4) is provided at the center of the outer side of the binding head (66), and the outer end of the wire insertion hole is provided with a semicircular chamfer.

7. A high-precision current sensor according to claim 6, characterized in that: The binding head (66) is made of a highly elastic material, and arc chamfers are provided on both sides of the butt joint groove (67) and the butt joint protrusion (68) facing each other.

8. A high-precision current sensor according to claim 7, characterized in that: The base (2) is provided with positioning grooves (9) on both the front and rear sides close to the through groove (11), and the top of the mounting seat (1) is fixedly connected with positioning protrusions (10) on both the front and rear sides thereof and engaged with the positioning grooves (9).

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