Support fixing device of sensor current line

Abstract

The utility model discloses a support fixing device for a sensor current line. The support fixing device comprises a first buckle and a second buckle which are located on the two sides outside a sensor and used for clamping and fixing an external current line. The first buckle comprises a first assembly block arranged on the side, provided with an external current line, of the sensor. The two sides of the first assembly block extend in the length direction of the sensor to form first bent supports. The second buckle comprises a second assembly block which is arranged on the outer side of the sensor and is symmetrical to the first assembly block, second bent supports are arranged on the two sides in the length direction of the sensor in an expanding mode, and avoiding openings are formed in the two sides, provided with external current lines, of the sensor. And the first assembly block and the second assembly block are nested and assembled in the sensor through the avoiding openings in the two sides. The support fixing device provided by the utility model can ensure that the position relation between the sensor and the external current line is stable, thereby ensuring the accuracy of a final detection result.

Description

Technical Field

[0001] This utility model belongs to the field of current sensor design, and in particular relates to a support fixing device for sensor current lines. Background Technology

[0002] The fluxgate current sensor is a high-sensitivity, low-noise current sensor with low hysteresis loss, good linearity, and excellent temperature stability. Its principle involves the excitation current and the measured current acting together on the sensor probe, causing the toroidal core to alternately enter positive and negative saturation states. When the core is in a coercive magnetic field, the measured current value is calculated using the linear relationship between the average value of the excitation current and the measured current on the primary side. The measured current is obtained by the difference between the measured magnetic field and the coercive magnetic field. This eliminates the coercive magnetic field and the error caused by temperature drift, thus solving the problem of error due to temperature drift and improving the sensor's temperature stability.

[0003] The sensor probe consists of a magnetic core, a measured winding, and an excitation winding. By selecting different winding methods for the excitation and measured windings, three different directional structures can be formed: parallel structure, orthogonal structure, and hybrid structure. The sensor probe comprises a toroidal magnetic core, a detection circuit, an excitation circuit, and a sampling resistor. The excitation circuit is a full-bridge inverter powered by a DC voltage source Vcc.

[0004] Existing internal card defects:

[0005] The internal clips need to be embedded in the hole for fixation, which places higher demands on installation space and positioning accuracy. If the machining accuracy of the parts is insufficient (such as hole position deviation), it may lead to installation difficulties or clip deformation. Furthermore, the vibration of the current line can cause changes in the magnetic field, resulting in magnetic field noise. This can lead to instability in the current sensor's output signal, thereby reducing measurement accuracy.

[0006] Internal clips usually require special tools (such as needle-nose pliers or pry bars) to remove, and improper handling can easily damage the clips or surrounding structures.

[0007] Patent document CN219434888U discloses a novel current sensor, which includes a circuit board assembly, a Hall chip, connecting copper pins, a sensor housing, a copper busbar, and a magnetic core. The main body of the sensor housing is a rectangular housing with one open end and a hollow interior. A snap-fit ​​rib and a plastic buckle that cooperate with the rib are provided at the opening. The Hall chip is soldered onto the circuit board assembly, and four connecting copper pins are respectively soldered onto the circuit board assembly. Finally, the circuit board assembly is inserted into the lower end of the sensor housing through a slot. The copper busbar is plastic-sealed on both sides of the sensor housing. The magnetic core is pressed into the sensor housing with a slight interference fit from the opening.

[0008] Patent document CN221224851U discloses an intelligent current sensor, comprising: an upper housing, a lower housing, a lower housing cover plate, a printed circuit board, a snap fastener, and an N-connection wire; the upper housing is fixedly connected to the lower housing via the snap fastener, the lower housing cover plate is fixedly connected to the end of the lower housing away from the upper housing, the lower housing cover plate is provided with an N-connection wire, one end of the N-connection wire is connected to the printed circuit board, and the other end of the N-connection wire is connected to a power system, the printed circuit board is placed inside the lower housing; the printed circuit board includes an MCU module, an electric field sensing circuit, and a voltage doubler rectifier circuit; the MCU module is connected to the electric field sensing circuit and the voltage doubler rectifier circuit respectively, and the electric field sensing circuit is connected to the N-connection wire. Utility Model Content

[0009] The purpose of this invention is to provide a support and fixing device for a sensor current line, which can ensure the stability of the positional relationship between the sensor and the external current line, thereby ensuring the accuracy of the final detection result.

[0010] To achieve the purpose of this utility model, the following technical solution is provided: a support fixing device for a sensor current line, wherein the sensor has externally bent current lines on both sides, and the fixing device includes a first buckle and a second buckle located on both sides of the sensor for clamping and fixing the external current lines.

[0011] The first buckle includes a first assembly block disposed on the side of the sensor with an external current line, the first assembly block having a first bending bracket extending on both sides along the length of the sensor, and the extended bending end of the first bending bracket having an outward buckle.

[0012] The second buckle includes a second assembly block that is symmetrically arranged with the first assembly block on the outside of the sensor and extends to both sides along the length of the sensor with a second bent bracket. The extended bent end of the second bent bracket is provided with an inward buckle that cooperates with the outward buckle.

[0013] The first assembly block has a first limiting groove for fixing an external current line on the side facing the sensor, and the second assembly block has a second limiting groove for fixing an external current line on the side facing the sensor.

[0014] The sensor has clearance openings on both sides with external current lines. The first assembly block and the second assembly block are nested and assembled inside the sensor through the clearance openings on both sides. The outward buckle and the inward buckle are fastened on the sides of the sensor without external current lines.

[0015] This utility model adopts an external buckle device with a double-sided symmetrical snap-fit ​​structure design to ensure that the current line passes through the annular magnetic core in a centrally symmetrical manner, ensuring the creepage safety factor, and at the same time preventing the influence of mechanical vibration.

[0016] Specifically, the first assembly block is provided with a first limiting block that enters the sensor through the clearance opening, and the second assembly block is provided with a second limiting block that enters the sensor through the clearance opening. The end of the first limiting block that extends into the sensor is provided with a shaped groove, and the end of the second limiting block that extends into the sensor is provided with a protrusion structure that matches and positions the shaped groove.

[0017] Specifically, the irregular groove is a cross-shaped groove, which includes four L-shaped plates with their outer side plates arranged opposite each other. The inner side plate of the L-shaped plate forms a support channel for the external current line inside the sensor.

[0018] Specifically, there are multiple sets of the first bending bracket and the corresponding second bending bracket, and the first bending bracket and the second bending bracket of each set are arranged at intervals along the bending direction of the external current line.

[0019] Specifically, the first assembly block and the second assembly block have positioning holes at locations away from the external current lines, and the sensor has positioning protrusions on both sides that cooperate with the positioning holes for positioning.

[0020] Specifically, the first assembly block has a first heat dissipation vent at a position relative to the first limiting groove;

[0021] The second assembly block has a second heat dissipation vent at a position relative to the second limiting groove.

[0022] Specifically, the first heat dissipation port is provided in multiple ways, and the multiple first heat dissipation ports are arranged at intervals along the limiting direction of the first external current line in the first limiting groove.

[0023] Specifically, the second heat dissipation port is provided in multiple ways, and the multiple second heat dissipation ports are arranged at intervals along the limiting direction of the external current line in the second limiting groove.

[0024] Specifically, the cross-sections of the outward-facing buckle and the inward-facing buckle along their length are trapezoidal.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] The double-sided symmetrical interlocking structure design enhances the overall load-bearing capacity of the device, resulting in a more uniform stress distribution and avoiding the risk of fracture caused by local stress concentration.

[0027] The trapezoidal cross-section design enables the buckle to generate a self-locking effect when closed, and vibration tests show that it can still maintain structural integrity under 15G acceleration. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the sensor mounting bracket fixing device provided in this embodiment;

[0029] Figure 2 This is a schematic diagram of the bracket fixing device provided in this embodiment;

[0030] Figure 3 This is a cross-sectional view of the sensor's interior provided in this embodiment;

[0031] Figure 4 This is a schematic diagram of the first buckle provided in this embodiment;

[0032] Figure 5 This is a schematic diagram of the second buckle provided in this embodiment;

[0033] Figure 6 This is a diagram showing the positional relationship between the second clip and the external current line during assembly, as provided in this embodiment.

[0034] Figure 7 for Figure 5 The main view;

[0035] In the diagram, 1 is the sensor; 2 is the first clip; 3 is the external current line; 4 is the second clip; 5 is the second heat dissipation vent; 6 is the positioning hole; 7 is the first heat dissipation vent; 8 is the clearance opening; 201 is the first assembly block; 202 is the first bending bracket; 203 is the outward clip; 204 is the first limiting groove; 205 is the cross-shaped groove; 401 is the second assembly block; 402 is the second bending bracket; 403 is the inward clip; 404 is the second limiting groove; and 405 is the protruding structure. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] like Figure 1 The diagram shown is a schematic of the sensor mounting bracket fixing device provided in this embodiment, wherein the sensor 1 has externally bent current lines 3 on both sides.

[0038] The fixing device includes a first buckle 2 and a second buckle 4 located on both sides of the sensor 1 for clamping and fixing the external current line 3.

[0039] like Figure 2 As shown, the first buckle 2 includes a first assembly block 201 disposed on the side of the sensor 1 with an external current line. The first assembly block 201 extends to both sides along the length direction of the sensor 1 with a first bending bracket 202, and the extended bending end of the first bending bracket 202 is provided with an outward buckle 203.

[0040] The second buckle 4 includes a second assembly block 401 arranged symmetrically with the first assembly block 201 on the outside of the sensor 1, and a second bending bracket 402 extending on both sides along the length direction of the sensor 1. The extended bending end of the second bending bracket 402 is provided with an inward buckle 403 that cooperates with the outward buckle 203.

[0041] like Figure 3 As shown, sensor 1 has clearance openings 8 on both sides with external current lines 3. The first assembly block 201 and the second assembly block 401 are nested and assembled inside the sensor through the clearance openings 8 on both sides. The outward and inward latches are used to secure the sensor on the sides without external current lines.

[0042] More specifically, such as Figure 4 As shown, the first assembly block 201 has a first limiting groove 204 for fixing the external current line 3 on the side facing the sensor 1. The first assembly block 201 has a first heat dissipation vent 7 at the position opposite to the first limiting groove 204. Figure 4 The back of the structure shown in the image is not displayed.

[0043] Meanwhile, the first assembly block 2 is provided with a first limiting block that enters the interior of the sensor 1 through the clearance opening 8. One end of the first limiting block that extends into the interior of the sensor 1 is provided with a cross-shaped groove 205. The cross-shaped groove 205 includes an L-shaped plate with four outer plates arranged opposite to each other. At the same time, the inner plate of the L-shaped plate forms a support channel for the external current line inside the sensor.

[0044] like Figure 5 As shown, the second assembly block 401 has a second limiting groove 404 for fixing the external current line 3 on the side facing the sensor 1, and a second heat dissipation port 5 is opened on the second assembly block 401 relative to the second limiting groove 404.

[0045] Meanwhile, the second assembly block 4 is provided with a second limiting block that enters the sensor 1 through the clearance opening 8. One end of the second limiting block is provided with a protruding structure 405 that matches and positions the cross-shaped groove 205.

[0046] The aforementioned first heat dissipation port 7 and second heat dissipation port 5 are multiple in number and are arranged at intervals along the corresponding limiting grooves, thereby improving the heat dissipation efficiency during operation.

[0047] The first assembly block 201 and the second assembly block 401 have positioning holes 6 at locations away from the external current lines. The sensor 1 has positioning protrusions on both sides that cooperate with the positioning holes 6 for positioning. The cooperation between the positioning holes 6 and the positioning protrusions improves the assembly efficiency of the fixed bracket device and the sensor 1, and also prevents angular displacement between the fixed bracket device and the sensor 1 during use.

[0048] Meanwhile, in this embodiment, the cross-sections of the outward buckle 203 and the inward buckle 403 along the length direction are trapezoidal. Through the double-sided symmetrical locking structure design, the load-bearing capacity is increased by 30%-45%, the stress distribution is more uniform, and the risk of fracture caused by local stress concentration is avoided. At the same time, the trapezoidal cross-section design enables the buckle to generate a self-locking effect in the closed state. Vibration tests show that it can still maintain structural integrity under 15G acceleration conditions.

[0049] like Figure 6 and Figure 7 As shown, taking the first assembly block 4 as an example, the assembly position relationship between its first limiting groove 204 or second limiting groove 404 and the external current line 3 is shown. That is, after the cross-shaped groove 205 and the protrusion structure 405 are nested together, a limiting channel is formed to deploy the direction of the external current 3 in the sensor 1, so as to avoid the current line shaking, which will cause its position in the middle of the magnetic core to be unstable, resulting in uneven magnetic field distribution, affecting the accurate measurement of the magnetic field by the fluxgate sensor, thereby reducing the measurement accuracy. At the same time, the cross-shaped structure separates multiple external current lines, increases the creepage distance and prevents the current lines from short-circuiting each other.

[0050] Furthermore, the terms "upper," "lower," "inner," "outer," "front," and "rear" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise specifically stated, the relative steps, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this invention.

[0051] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

[0052] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A support fixing device for a sensor current line, the sensor being provided with an externally located current line bent in a direction on both sides of the sensor, characterized in that The fixing device includes a first buckle and a second buckle located on both sides outside the sensor for clamping and fixing the external current line. The first buckle includes a first assembly block disposed on the side of the sensor with an external current line, the first assembly block having a first bending bracket extending on both sides along the length of the sensor, and the extended bending end of the first bending bracket having an outward buckle. The second buckle includes a second assembly block that is symmetrically arranged with the first assembly block on the outside of the sensor and extends to both sides along the length of the sensor with a second bent bracket. The extended bent end of the second bent bracket is provided with an inward buckle that cooperates with the outward buckle. The first assembly block has a first limiting groove for fixing an external current line on the side facing the sensor, and the second assembly block has a second limiting groove for fixing an external current line on the side facing the sensor. The sensor has clearance openings on both sides with external current lines. The first assembly block and the second assembly block are nested and assembled inside the sensor through the clearance openings on both sides. The outward buckle and the inward buckle are fastened on the sides of the sensor without external current lines.

2. The sensor current wire support fixture of claim 1, wherein, The first assembly block is provided with a first limiting block that enters the sensor through a clearance opening, and the second assembly block is provided with a second limiting block that enters the sensor through a clearance opening. The end of the first limiting block that extends into the sensor is provided with a shaped groove, and the end of the second limiting block that extends into the sensor is provided with a protrusion structure that matches and positions the shaped groove.

3. The support fixture for sensor current wires of claim 2, wherein, The irregular groove adopts a cross-shaped groove, which includes four L-shaped plates with their outer side plates arranged opposite each other. The inner side plate of the L-shaped plate forms a support channel for the external current line inside the sensor.

4. The sensor current wire support fixture of claim 1, wherein, There are multiple sets of the first bending bracket and the corresponding second bending bracket, and the first bending bracket and the second bending bracket of each set are arranged at intervals along the bending direction of the external current line.

5. The sensor current wire support fixture of claim 1, wherein, The first assembly block and the second assembly block have positioning holes at locations away from the external current lines, and the sensor has positioning protrusions on both sides that cooperate with the positioning holes for positioning.

6. The sensor current wire support fixture of claim 1, wherein, The first assembly block has a first heat dissipation vent at a position relative to the first limiting groove; The second assembly block has a second heat dissipation vent at a position relative to the second limiting groove.

7. A support fixture for a sensor current line according to claim 6, characterized in that The first heat dissipation port is provided in multiple ways, and the multiple first heat dissipation ports are arranged at intervals along the limiting direction of the first external current line in the first limiting groove.

8. The sensor current wire support fixture of claim 6, wherein, The second heat dissipation port is provided in multiple ways, and the multiple second heat dissipation ports are arranged at intervals along the limiting direction of the external current line in the second limiting groove.

9. The sensor current wire support fixture of claim 1, wherein, The cross-sections of the outward-facing buckle and the inward-facing buckle along their length are trapezoidal.

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