A sampling resistor with an axial mounting structure

Abstract

The present invention discloses a sampling resistor with an axial mounting structure, which comprises: a first electrode, a second electrode, a resistor body and a positioning assembly, wherein the resistor body is arranged between the first electrode and the second electrode, and the three form a C-shaped structure as a whole. The second electrode has the same structure as the first electrode. The first electrode is provided with a horizontal section and a curved section, wherein an assembly through hole is provided on the horizontal section, and the curved section is welded to the resistor body. The positioning assembly comprises: a first positioning column, a second positioning column, a first nut, a second nut and an intermediate sleeve, wherein the first nut and the second nut are respectively threadedly connected to the two ends of the intermediate sleeve. The first positioning column is slidably arranged in the first nut, and the second positioning column is slidably arranged in the second nut, and a reset elastic member is arranged between the first positioning column and the second positioning column, and the first positioning column and the second positioning column are respectively adapted to two assembly through holes. The sampling resistor can meet special structural layout design requirements and has a high anti-interference ability.

Description

Technical Field

[0001] The invention relates to the technical field of sampling resistors, and in particular to a sampling resistor with an axial installation structure. Background Art

[0002] The sampling resistor is a key component used to measure the current in the circuit. By introducing a resistor in the circuit, the current to be measured is converted into a voltage signal proportional to it. Sampling resistors are widely used in various electronic devices and measuring instruments for real-time monitoring and control of current. Taking the voltage-stabilized power supply circuit as an example, in order to keep the output voltage constant, a part of the voltage is taken from the output voltage as a reference. If the output is high, the input end automatically reduces the voltage to reduce the output; if the output is low, the input end automatically increases the voltage to increase the output.

[0003] However, traditional sampling resistors can only be installed horizontally, which occupies a large area. In some application scenarios, they cannot meet the special structural layout design requirements of the equipment. Moreover, the horizontally installed sampling resistors are prone to overlap with other components during layout installation, thereby causing interference.

[0004] Therefore, how to design a sampling resistor with an axial installation structure so that it can reduce the space occupied by the installation, meet the special structural layout design requirements, and have high anti-interference ability is a technical problem that technicians in this field need to solve. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a sampling resistor with an axial installation structure, so that the space occupied by the installation can be reduced, special structural layout design requirements can be met, and at the same time, the sampling resistor has a high anti-interference ability.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A sampling resistor with an axial installation structure, comprising: a first electrode, a second electrode, a resistor body and a positioning assembly, wherein the resistor body is arranged between the first electrode and the second electrode, and the resistor body, the first electrode and the second electrode form a C-shaped structure;

[0008] The structure of the second electrode is the same as that of the first electrode; the first electrode is provided with a horizontal section and a curved section, the horizontal section is provided with an assembly through hole, and the curved section is welded to the side surface of the resistor;

[0009] The positioning assembly is detachably arranged at the opening of the C-shaped structure, and the positioning assembly includes: a first positioning column, a second positioning column, a first nut, a second nut and an intermediate sleeve, wherein the first nut and the second nut are respectively threadedly connected to the two ends of the intermediate sleeve, and when the intermediate sleeve rotates, the first nut and the second nut simultaneously move closer to or farther from the intermediate sleeve;

[0010] The first positioning post is slidably disposed in the first nut, the second positioning post is slidably disposed in the second nut, a reset elastic member is disposed between the first positioning post and the second positioning post, and the first positioning post and the second positioning post are respectively adapted to the two assembly through holes.

[0011] In one embodiment, the distance between the first electrode and the second electrode is H1, and the thickness of the first electrode and the second electrode is H2;

[0012] The positioning component has three states: a compressed state, a free state and an extended state;

[0013] When in a compressed state, the first nut and the second nut are both located closest to the intermediate sleeve, the resetting elastic member is compressed, and the total length of the first positioning column and the second positioning column is L1, and L1

[0014] When in a free state, the resetting elastic member is freely extended, the total length of the first positioning column and the second positioning column is L2, and H1<L2

[0015] When in the extended state, the first nut and the second nut are both away from the middle sleeve, the resetting elastic member is stretched, the total length of the first positioning column and the second positioning column is L3, and L3≥H1+2H2.

[0016] In one embodiment, the first nut includes a main body and a blocking ring disposed on the main body, an outer wall of the main body is provided with an external thread, and a receiving groove for receiving the first positioning column is provided on the main body;

[0017] The structure of the second nut is similar to that of the first nut, and the receiving groove of the second nut is used to receive the second positioning column.

[0018] In one embodiment, the first positioning post and the second positioning post are both provided with a conical surface, and the receiving groove of the first nut and the receiving groove of the second nut are both provided with a conical groove adapted to the conical surface.

[0019] In one of the embodiments, anti-slip grooves are provided on the outer wall of the intermediate sleeve. ​​

[0020] In one embodiment, the first electrode and the second electrode are made of copper, and the first positioning column, the second positioning column, the first nut and the second nut are all made of insulating materials.

[0021] In one embodiment, the first electrode and the second electrode are both provided with an integrally formed sampling pin.

[0022] In one of the embodiments, a temperature control device is housed at the opening of the C-shaped structure, the temperature control device is electrically connected to the resistor, and the temperature control device is used to monitor the ambient temperature of the resistor in real time.

[0023] In summary, the sampling resistor with an axial installation structure of the present invention can reduce the size of the space occupied by the installation to meet the special structural layout design requirements; at the same time, it has a high anti-interference ability and improves the accuracy of the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are 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 creative work.

[0025] Figure 1 It is a structural schematic diagram of a sampling resistor with an axial installation structure according to the present invention;

[0026] Figure 2 for Figure 1 The structural decomposition diagram of the sampling resistor shown;

[0027] Figure 3 for Figure 1 A schematic diagram of the structure of the first electrode, the second electrode and the resistor shown;

[0028] Figure 4 for Figure 1 A schematic diagram of the structural breakdown of the positioning assembly shown;

[0029] Figure 5 for Figure 1 A partial cross-sectional view of the positioning assembly shown;

[0030] Figure 6 It is a schematic diagram of the state of the sampling resistor with an axial installation structure at the initial installation;

[0031] Figure 7 It is a schematic diagram of the state of the sampling resistor with an axial installation structure during the installation process;

[0032] Figure 8 It is a schematic diagram of the state of the sampling resistor with an axial installation structure after installation;

[0033] Fig. 9 This is a schematic diagram of the sampling resistor being installed in a special structural layout. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] The present invention provides a sampling resistor 10 with an axial installation structure, such as Figure 1 and Figure 2 As shown, it comprises: a first electrode 100, a second electrode 200, a resistor 300 and a positioning assembly 400, wherein the resistor 300 is disposed between the first electrode 100 and the second electrode 200. The resistor 300, the first electrode 100 and the second electrode 200 form a C-shaped structure as a whole.

[0038] The structure of the second electrode 200 is the same as that of the first electrode 100. Figure 3 As shown, the first electrode 100 is provided with a horizontal section 110 and a curved section 120 . The horizontal section 110 is provided with an assembly through hole 111 . The curved section 120 is welded to the side surface of the resistor 300 .

[0039] The positioning assembly 400 is detachably disposed at the opening of the C-shaped structure. Figure 4 and Figure 5As shown, the positioning assembly 400 includes: a first positioning column 410, a second positioning column 420, a first nut 430, a second nut 440 and an intermediate sleeve 450, wherein the first nut 430 and the second nut 440 are respectively threadedly connected to the two ends of the intermediate sleeve 450. When the intermediate sleeve 450 rotates, the first nut 430 and the second nut 440 will simultaneously approach or move away from the intermediate sleeve 450.

[0040] The first positioning post 410 is slidably disposed in the first nut 430, and the second positioning post 420 is slidably disposed in the second nut 440. A reset elastic member 460 is disposed between the first positioning post 410 and the second positioning post 420. The first positioning post 410 and the second positioning post 420 are respectively adapted to the above-mentioned two assembly through holes 111. That is, when the positioning assembly 400 is installed at the opening of the C-shaped structure, the first positioning post 410 and the second positioning post 420 are respectively plugged into the assembly through hole 111 of the first electrode 100 and the assembly through hole 111 of the second electrode 200.

[0041] like Figure 6 As shown, the distance between the first electrode 100 and the second electrode 200 is H1, and the thickness of the first electrode 100 and the second electrode 200 are both H2.

[0042] During operation, according to the change of the matching relationship, the positioning assembly 400 can be divided into three states: a compressed state, a free state, and an extended state;

[0043] When in the compressed state, the first nut 430 and the second nut 440 are both at the position closest to the middle sleeve 450, at which time the resetting elastic member 460 is compressed, and the total length of the first positioning column 410 and the second positioning column 420 is L1, and L1

[0044] When in a free state (such as Figure 7 As shown in FIG. 1 ), the resetting elastic member 460 is freely extended, the total length of the first positioning column 410 and the second positioning column 420 is L2, and H1<L2

[0045] When in extended state (such as Figure 8 As shown in FIG. 1 ), the first nut 430 and the second nut 440 are both away from the middle sleeve 450, the reset elastic member 460 is stretched, and the total length of the first positioning column 410 and the second positioning column 420 is L3, and L3 ≥ H1 + 2H2. At this time, the ends of the first positioning column 410 and the second positioning column 420 will both protrude from the assembly through hole 111 so as to be clamped with the external fixed structure. ​​

[0046] In this embodiment, to improve the conductive efficiency, the first electrode 100 and the second electrode 200 are made of copper, and the first positioning post 410, the second positioning post 420, the first nut 430 and the second nut 440 are all made of insulating materials, so as to prevent the first electrode 100 and the second electrode 200 from being conductively connected.

[0047] In this embodiment, if Figure 4 As shown, the first nut 430 includes a main body 431 and a blocking ring 432 disposed on the main body 431. The outer wall of the main body 431 is provided with an external thread 433, and the main body 431 is provided with a receiving groove 434 for receiving the first positioning column 410. The structure of the second nut 440 is similar to that of the first nut 430, and the receiving groove 434 of the second nut 440 is used to receive the second positioning column 420.

[0048] The first positioning post 410 and the second positioning post 420 are both provided with a conical surface 411 (such as Figure 4 As shown, a conical groove 435 (as shown in FIG. 1 ) is provided in the receiving groove 434 of the first nut 430 and the receiving groove 434 of the second nut 440 to match the conical surface 411. Figure 7 As shown). The conical groove 435 cooperates with the conical surface 411 to play a supporting role, that is, when the conical surface 411 is blocked by the conical groove 435, the first positioning column 410 and the second positioning column 420 can only move in the direction away from the conical groove 435. In combination with the above, it can be seen that when in the extended state, the first nut 430 and the second nut 440 are both away from the intermediate sleeve 450. With the cooperation of the conical groove 435 and the conical surface 411, the first nut 430 and the second nut 440 can push the first positioning column 410 and the second positioning column 420, thereby making the first positioning column 410 and the second positioning column 420 move away from each other.

[0049] When working, Figure 8As shown, two external conductive wires 20 (such as current copper busbars) are electrically connected to the first electrode 100 and the second electrode 200 respectively. The current is emitted from one of the external conductive wires 20, passes through the first electrode 100, the resistor 300 and the second electrode 200 in sequence, and finally returns to the other external conductive wire 20. The first electrode 100, the second electrode 200 and the resistor 300 form a C-shaped structure as a whole, so that the C-shaped structure can be installed in a special structural layout. Furthermore, when working, the positioning assembly 400 is arranged at the opening of the C-shaped structure, the first positioning column 410 is inserted into the assembly through hole 111 of the first electrode 100, the second positioning column 420 is inserted into the assembly through hole 111 of the second electrode 200, the first nut 430 presses the end of one of the external conductive wires 20 on the first electrode 100, and the second nut 440 presses the end of the other external conductive wire 20 on the second electrode 200, so as to ensure that the external conductive wire 20 stably contacts the first electrode 100 and the second electrode 200, thereby ensuring good conductive performance.

[0050] The installation principle and steps of the sampling resistor 10 of the present invention are described below:

[0051] Initially, the first electrode 100, the second electrode 200 and the resistor 300 form a C-shaped structure as a whole, and the positioning assembly 400 has not yet been assembled into the C-shaped structure (eg Figure 6 As shown), the positioning assembly 400 at this time needs to be adjusted to a compressed state before it can be assembled into the C-shaped structure. Specifically, first rotate the intermediate sleeve 450 so that the first nut 430 and the second nut 440 are both moved toward the center (close to each other) until the distance between the two is minimized; then press the first positioning column 410 and the second positioning column 420 so that the reset elastic member 460 is compressed, and the total length of the first positioning column 410 and the second positioning column 420 changes to L1. In this way, the positioning assembly 400 is adjusted to a compressed state, and it can be smoothly inserted into the opening of the C-shaped structure;

[0052] When the positioning assembly 400 is inserted into the C-shaped structure, the positioning assembly 400 is no longer subjected to pressure, the reset elastic member 460 is freely extended, and the first positioning column 410 and the second positioning column 420 are separated from each other until the total length of the two changes to L2. At this time, the first positioning column 410 is partially inserted into the assembly through hole 111 of the first electrode 100, and the second positioning column 420 is partially inserted into the assembly through hole 111 of the second electrode 200. Both ends of the positioning assembly 400 are clamped and cannot be separated from the C-shaped structure. The sampling resistor 10 is in a free state (such as Figure 7 shown);

[0053] Then, the staff places the sampling resistor 10 (C-shaped structure and positioning component 400) into the designated special layout slot (such as Fig. 9As shown), the two external conductive wires 20 are respectively attached to the first electrode 100 and the second electrode 200. Next, the middle sleeve 450 is rotated so that the first nut 430 and the second nut 440 are both away from the center, and the two squeeze the external conductive wires 20 toward both ends. In other words, the first nut 430 presses one of the external conductive wires 20 onto the first electrode 100, and the second nut 440 presses the other external conductive wire 20 onto the second electrode 200. During this process, the first nut 430 will push the first positioning column 410 to move, the second nut 440 will push the second positioning column 420 to move, the reset elastic member 460 is stretched, and the sampling resistor 10 changes to an extended state (as shown in FIG. 1 ). Figure 8 As shown). In the extended state, the ends of the first positioning column 410 and the second positioning column 420 will both protrude out of the assembly through hole 111, and then be clamped with the external fixed structure (slot wall or support frame, etc.). At this point, the installation of the sampling resistor 10 is completed.

[0054] It should be noted that the conventional sampling resistor can only be installed horizontally, that is, the first electrode 100, the second electrode 200 and the resistor body 300 are basically on the same plane, resulting in a large area occupied by this structure (wider surface area) and cannot meet the special structural layout design requirements. In addition, since the resistor is a plate structure, and the plate has a wide surface area and a large spatial span of the main body, it is inevitable that it will overlap with other metal devices and signal equipment during installation, which makes the resistor more susceptible to interference from external electromagnetic signals, thereby affecting the sampling accuracy. However, in the present invention, the first electrode 100, the second electrode 200 and the resistor body 300 of the sampling resistor 10 form a C-shaped structure as a whole, and the first electrode 100 and the second electrode 200 are fixed in the axial direction during installation. Compared with the prior art, the design of the C-shaped structure of the present invention makes the area occupied by the sampling resistor 10 smaller, and since the overall C-shaped structure is formed, the sampling resistor 10 is not easy to overlap with other metal devices and signal equipment; even if the position overlaps, the C-shaped structure is much less affected by the electromagnetic signal than the plate structure. In this way, the design of the C-type structure not only reduces the space occupied by the installation and meets the special structural layout design requirements, but also has a high anti-interference ability and improves the sampling accuracy.

[0055] Furthermore, the sampling resistor 10 of the present invention is also designed with a positioning assembly 400 for fixing and installing the sampling resistor 10 and connecting the external conductive wire 20. Specifically, during installation, the first nut 430 and the second nut 440 can be controlled to shrink or expand simultaneously by rotating the intermediate sleeve 450, and in the extended state, the first nut 430 and the second nut 440 will move with the first positioning column 410 and the second positioning column 420, so that the ends of the first positioning column 410 and the second positioning column 420 will both protrude from the assembly through hole 111, and then be clamped with the external fixed structure. In this way, only the intermediate sleeve 450 needs to be rotated to conveniently and quickly complete the fixed installation or disassembly of the sampling resistor 10. At the same time, the connection of the external conductive wire 20 can also be completed only by rotating the intermediate sleeve 450, realizing convenient operation.

[0056] It should be emphasized that after the sampling resistor 10 is installed, the positioning assembly 400 is in an extended state, and the reset elastic member 460 is stretched, which means that the first positioning column 410 and the second positioning column 420 are always subjected to tension and have a tendency to approach each other. Under the action of this tension, the first nut 430 and the second nut 440 also have a tendency to approach the center, which makes the external threads 433 thereon squeeze the threads of the intermediate sleeve 450, increasing the friction of the thread matching, thereby ensuring that the intermediate sleeve 450 will not easily rotate without external force.

[0057] Preferably, the outer wall of the middle sleeve 450 is provided with anti-skid patterns (not shown), which can enhance the friction coefficient of the surface of the middle sleeve 450, thereby preventing slipping during rotation. Of course, in other embodiments, the shape of the middle sleeve 450 can also be a multi-prism structure, which can also achieve the effect of anti-skid during rotation.

[0058] In this embodiment, the first electrode 100 and the second electrode 200 are both provided with an integrally formed sampling pin 101 (eg Figure 3 The sampling pin 101 is connected to the voltage sampling line of the external test equipment. When in use, current is passed through the first electrode 100 and the second electrode 200, and then the voltage is collected and sampled through the sampling pin 101, thereby realizing the principle of the four-wire method for current detection, that is, real-time current = voltage / resistance value.

[0059] In other embodiments, a temperature control device (not shown) is housed at the opening of the C-shaped structure, and the temperature control device is electrically connected to the resistor 300, and the temperature control device is used to monitor the ambient temperature of the resistor 300 in real time. Furthermore, in the case where disassembly is not required for a long time, the C-shaped structure can be filled as a whole by injection molding, and the temperature control device and the sampling resistor 10 can be wrapped into a whole for easy use.

[0060] In summary, the sampling resistor 10 with an axial installation structure of the present invention can reduce the size of the space occupied by the installation to meet special structural layout design requirements; at the same time, it has a high anti-interference ability and improves the accuracy of the measurement data.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A sampling resistor with an axial mounting structure, characterized in that: include: A first electrode, a second electrode, a resistor and a positioning component, wherein the resistor is disposed between the first electrode and the second electrode, and the resistor, the first electrode and the second electrode form a C-shaped structure; The structure of the second electrode is the same as that of the first electrode; the first electrode is provided with a horizontal section and a curved section, the horizontal section is provided with an assembly through hole, and the curved section is welded to the side surface of the resistor; The positioning assembly is detachably arranged at the opening of the C-shaped structure, and the positioning assembly includes: a first positioning column, a second positioning column, a first nut, a second nut and an intermediate sleeve, wherein the first nut and the second nut are respectively threadedly connected to the two ends of the intermediate sleeve, and when the intermediate sleeve rotates, the first nut and the second nut simultaneously move closer to or farther from the intermediate sleeve; The first positioning post is slidably disposed in the first nut, the second positioning post is slidably disposed in the second nut, a reset elastic member is disposed between the first positioning post and the second positioning post, and the first positioning post and the second positioning post are respectively adapted to the two assembly through holes; The distance between the first electrode and the second electrode is H1, and the thickness of the first electrode and the second electrode is H2; The positioning component has three states: a compressed state, a free state and an extended state; When in a compressed state, the first nut and the second nut are both located closest to the intermediate sleeve, the resetting elastic member is compressed, and the total length of the first positioning column and the second positioning column is L1, and L1<H1; When in a free state, the resetting elastic member is freely extended, the total length of the first positioning column and the second positioning column is L2, and H1<L2<H1+2H2; When in the extended state, the first nut and the second nut are both away from the intermediate sleeve, the reset elastic member is stretched, the total length of the first positioning column and the second positioning column is L3, and L3≥H1+2H2; the first nut presses one of the external conductive wires onto the first electrode, and the second nut presses the other external conductive wire onto the second electrode; the ends of the first positioning column and the second positioning column both protrude from the assembly through hole, and then clamp with the external fixed structure; The first positioning column and the second positioning column are both provided with a conical surface, and the receiving groove of the first nut and the receiving groove of the second nut are both provided with a conical groove adapted to the conical surface.

2. The sampling resistor with an axial installation structure according to claim 1, characterized in that: The first nut comprises a main body and a blocking ring arranged on the main body, the outer wall of the main body is provided with an external thread, and the main body is provided with a receiving groove for receiving the first positioning column; The structure of the second nut is similar to that of the first nut, and the receiving groove of the second nut is used to receive the second positioning column.

3. The sampling resistor with an axial installation structure according to claim 1, characterized in that: The outer wall of the middle sleeve is provided with anti-slip grooves.

4. The sampling resistor with an axial installation structure according to claim 1, characterized in that: The first electrode and the second electrode are made of copper, and the first positioning column, the second positioning column, the first nut and the second nut are all made of insulating materials.

5. The sampling resistor with an axial installation structure according to claim 1, characterized in that: The first electrode and the second electrode are both provided with an integrally formed sampling pin.

6. The sampling resistor with an axial installation structure according to claim 1, characterized in that: A temperature control device is housed at the opening of the C-shaped structure. The temperature control device is electrically connected to the resistor and is used to monitor the ambient temperature of the resistor in real time.

Images