Large-resistance high-precision sampling resistor

Abstract

The utility model relates to the technical field of resistor processing, in particular to a large-resistance high-precision sampling resistor. According to the utility model, the input end and the output end are wound on the fixing piece in the same direction by taking the fixing piece as the center to form the resistor body, the resistor body is arranged in the shell, and the input end and the output end respectively penetrate out of the lead holes in the cover plate to form the input pin and the output pin. According to the invention, the original surface area of the resistor is stacked to realize the volume light weight, and the resistance value can be shared instead of the complicated resistance adjusting pattern design on a resistor area for the large resistance value requirement, so that the resistor body can make the heat more uniform; the resistance value of the resistor body is adjusted by increasing and decreasing the length of the resistor material, so that excessive materials are not wasted, and resistor products with different large resistance values can be prepared.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of resistance processing technology relates to a big resistance value high accuracy sampling resistance. BACKGROUND

[0002] The existing sampling resistance can be divided into chip resistance and plug-in resistance according to the installation mode, and the high-power alloy resistance on the market is all single-layer resistance body structure, which cannot simultaneously consider small size, big resistance value and high precision characteristics. Therefore, when facing some big resistance value high performance proofing requirements, only the device volume can be increased to meet the product requirements, and the installation is inconvenient, and the product as a whole cannot simultaneously consider the requirements of small size and big resistance value. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem to provide a big resistance value high accuracy sampling resistance that volume lightweight is realized through the winding design of resistance material, and the surface area required by resistance is realized by stacking.

[0004] In order to solve the above technical problem, the technical scheme that the utility model solves its technical problem is:

[0005] A big resistance value high accuracy sampling resistance, comprising:

[0006] A shell is provided with an assembly cavity, the shell is provided with a cover plate, and the cover plate is provided with a lead hole;

[0007] A resistance body is arranged in the assembly cavity, the resistance body comprises a fixing part, the fixing part is wound with resistance material, a first insulating layer is arranged between the resistance material and the fixing part, and the outer side of the resistance material is provided with a second insulating layer;

[0008] The resistance material has an input end and an output end, the input end and the output end are wound on the fixing part in the same direction with the fixing part as the center, and the input end and the output end respectively pass out of the lead hole on the cover plate to form input pins and output pins.

[0009] In an embodiment of the utility model, a buckling part is further included, an opening is arranged on the buckling part, the width of the opening is smaller than the diameter of the fixing part, the buckling part is made of elastic material, and the buckling part is clamped on the fixing part to fix the resistance material on the fixing part as an initial winding point.

[0010] In an embodiment of the utility model, the fixing part is made of metal material, and the buckling part is made of insulating material.

[0011] In an embodiment of the utility model, the shell and the cover plate are both made of metal material, and the cover plate and the shell are in sealed connection.

[0012] In one embodiment of the utility model, the resistance material is filamentous or flaky, the resistance material is arranged on the fixing part to form a resistance body in a round flaky or cylindrical shape, and a gap is arranged between the resistance material and the shell.

[0013] In one embodiment of the utility model, the width of the first and second insulating layers is slightly larger than the width of the resistance material, so that the resistance material is clamped between the first and second insulating layers.

[0014] In one embodiment of the utility model, a guide groove matched with the fixing part is arranged on the inner wall of the shell, and the two ends of the fixing part are clamped on the guide groove.

[0015] In one embodiment of the utility model, the resistance material is made of manganese copper or karna alloy.

[0016] In one embodiment of the utility model, the shell is filled with a heat dissipation liquid, and the resistance body is completely immersed in the heat dissipation liquid.

[0017] In one embodiment of the utility model, the heat dissipation liquid is silicon oil.

[0018] The utility model has the advantages of:

[0019] The input end and the output end are wound in the same direction on the fixing part to form a resistance body, the resistance body is arranged in the shell, the input end and the output end are respectively led out from the lead hole of the cover plate to form an input pin and an output pin, the volume of the resistance is lightened by stacking the required surface area of the resistance through material winding design, and when a large resistance value is required, the resistance value can be shared instead of complex resistance adjustment pattern design on one resistance area to achieve the purpose, the heat is more uniform by the resistance body; the resistance value of the resistance body is adjusted by increasing or reducing the length of the resistance material, and excessive material is not wasted, and resistance products with different large resistance values can be prepared. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a large resistance value high-precision sampling resistance schematic diagram of the utility model.

[0021] Fig. 2 It is a resistance body schematic diagram of the utility model.

[0022] Explanation of reference numerals in the drawing: 1, shell; 11, cover plate; 12, input pin; 13, output pin; 14, guide groove; 2, resistance material; 21, first insulating layer; 22, second insulating layer; 3, fixing part; 4, buckling part; 41, opening; 5, output end; 6, input end. DETAILED DESCRIPTION

[0023] The utility model will be further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0024] Referring to Figs. 1-2 As shown in the figure, a large resistance high-precision sampling resistor comprises:

[0025] The shell 1 is provided with an assembly cavity, the shell 1 is provided with a cover plate 11, and the cover plate 11 is provided with a lead hole;

[0026] The resistor body is arranged in the assembly cavity, the resistor body comprises a fixing member 3, the fixing member 3 is wound with a resistance material 2, a first insulating layer 21 is arranged between the resistance material 2 and the fixing member 3, and the outer side of the resistance material 2 is provided with a second insulating layer 22;

[0027] The resistance material 2 has an input end 6 and an output end 5, the input end 6 and the output end 5 are wound on the fixing member 3 in the same direction with the fixing member 3 as the center, and the input end 6 and the output end 5 respectively pass out of the lead hole on the cover plate 11 to form an input pin 12 and an output pin 13.

[0028] The input end 6 and the output end 5 of the utility model are wound on the fixing member 3 in the same direction with the fixing member 3 as the center to form a resistor body, the resistor body is arranged in the shell 1, the input end 6 and the output end 5 respectively pass out of the lead hole on the cover plate 11 to form an input pin 12 and an output pin 13, through the material winding design, the surface area originally required by the resistance is realized by the volume lightweight of stacking, so that small volume, large resistance and high precision are considered, and when the large resistance requirement is considered, the resistance value can be shared instead of complex resistance adjustment pattern design on one resistance area to achieve the purpose, the resistance body can make the heat more uniform; the resistance value of the resistor body is adjusted by increasing or reducing the length of the resistance material 2, and excessive material can be saved, and resistance products with different large resistance values can be prepared.

[0029] In an embodiment of the utility model, further comprising a buckling member 4, the buckling member 4 is provided with an opening 41, the width of the opening 41 is less than the diameter of the fixing member 3, the buckling member 4 is made of elastic material, and the buckling member 4 is clamped on the fixing member 3 to fix the resistance material 2 on the fixing member 3 as the initial winding point, the first insulating layer 21, the resistance material 2 and the second insulating layer 22 are clamped by the buckling member 4, so that subsequent winding processing of the resistance material 2 on the fixing member 3 is facilitated, the resistance value is changed by changing the length of the resistance material 2, so that small volume, large resistance and high precision characteristics are considered.

[0030] In an embodiment of the utility model, the fixed part 3 is made of metal material, so that it can dissipate the heat of the resistance body through silicone oil, and the overheat of the resistance body is avoided, and the fastening part 4 is made of insulating material.

[0031] In an embodiment of the utility model, the shell 1 and the cover plate 11 are both made of metal material, and the cover plate 11 is sealingly connected with the shell 1; the shell 1 made of metal material can not only shield interference and protect internal organization, but also assist in dissipating the heat generated by the resistance body.

[0032] In an embodiment of the utility model, the resistance material 2 is in the form of wire or sheet, and the resistance material 2 is wound on the fixed part 3 to form a resistance body in the form of a disc or a cylinder; the volume of the resistance body is lightened by stacking the surface area of the resistance body, the resistance value can be changed by changing the length of the resistance material 2, and a gap is arranged between the resistance material 2 and the shell 1.

[0033] In an embodiment of the utility model, the widths of the first insulating layer 21 and the second insulating layer 22 are slightly greater than the width of the resistance material 2; the first insulating layer 21 and the second insulating layer 22 are arranged on the resistance material 2 to form a three-layer structure, the resistance material 2 in the middle layer can be in contact with silicone oil due to the slightly greater width, so that the heat dissipation effect of the resistance body is improved, and the resistance material 2 is clamped between the first insulating layer 21 and the second insulating layer 22.

[0034] In an embodiment of the utility model, a guide groove 14 matched with the fixed part 3 is arranged on the inner wall of the shell 1, and the two ends of the fixed part 3 are clamped on the guide groove 14; the assembly precision of the fixed part 3 and the shell 1 is ensured by the arrangement of the guide groove 14, the position of the fixed part 3 is limited, the position deviation of the resistance body caused by vibration and other problems is avoided, and the normal use of the resistance body is ensured.

[0035] The center line of the fixed part 3 is perpendicular to the center line of the shell 1.

[0036] In an embodiment of the utility model, the resistance material 2 is made of manganese copper or Karma alloy (nickel-chromium resistance alloy).

[0037] In an embodiment of the utility model, the shell 1 is filled with heat dissipation liquid, and the resistance body is completely immersed in the heat dissipation liquid.

[0038] In an embodiment of the utility model, the heat dissipation liquid is silicone oil; the silicone oil can dissipate the heat generated by the resistance body, and also can protect and buffer the resistance body, so that the heat dissipation effect of the resistance body is improved.

[0039] In use, the design of winding the resistance material 2 on the fixing member 3 can realize the volume lightweight of the surface area originally required by the resistance through stacking. Moreover, when facing the requirement of large resistance value, the resistance value can be shared instead of complex resistance adjustment pattern design on one resistance area to achieve the purpose, and the heat generated in the working process of the resistance can be evenly dissipated. Moreover, the resistance value is adjusted by the increase and decrease of the length of the material, and excessive material is not wasted, and multiple resistance values can be conveniently realized.

[0040] The above-described embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. The equivalent substitutions or transformations made by the skilled in the art on the basis of the present application are all within the protection scope of the present application. The protection scope of the present application is subject to the claims.

Claims

1. A high-resistance, high-precision sampling resistor, characterized in that, The utility model relates to a kind of resistance, including: Shell is arranged with assembly cavity in it, the shell is provided with cover plate, and the cover plate is provided with lead hole; Resistance body is arranged in the assembly cavity, and the resistance body includes fixing part, resistance material is wound on the fixing part, first insulating layer is arranged between the resistance material and fixing part, and second insulating layer is arranged on the outside of resistance material; Wherein, the resistance material has input end and output end, the input end and the output end are wound on the fixing part in the same direction with the fixing part as center, and the input end and output end respectively from the lead hole on the cover plate form input pin and output pin.

2. The high-precision sampling resistor of claim 1, wherein the high-precision sampling resistor is a high-precision sampling resistor with a large resistance value. It further includes buckle piece, the buckle piece is provided with an opening, the width of the opening is less than the diameter of the fixing part, the buckle piece is made of elastic material, and the buckle piece is clamped on the fixing part to fix resistance material on the fixing part as initial winding point.

3. The high-precision sampling resistor of claim 2, wherein the plurality of resistive elements are connected in series. The fixing part is made of metal material, and the buckle piece is made of insulating material.

4. The high-precision sampling resistor of claim 1, wherein the high-precision sampling resistor is a high-precision sampling resistor with a high resistance value. The shell and the cover plate are made of metal material, and the cover plate and the shell are sealingly connected.

5. The high-precision sampling resistor of claim 1, wherein the high-precision sampling resistor is a high-precision sampling resistor with a high resistance value. The resistance material is filamentous or sheet-shaped, the resistance material is wound on the fixing part to form resistance body, so that it is round sheet or cylindrical, and gap is arranged between the resistance material and the shell.

6. The high-precision sampling resistor of claim 1, wherein the high-precision sampling resistor is a high-precision sampling resistor with a large resistance value. The width of the first insulating layer and the second insulating layer is slightly larger than the width of the resistance material, so that the resistance material is clamped between the first insulating layer and the second insulating layer.

7. The high-precision sampling resistor of claim 1, wherein the high-precision sampling resistor is a high-precision sampling resistor with a high resistance value. The inner wall of the shell is provided with guide groove matched with the fixing part, and the both ends of the fixing part are clamped on the guide groove.

8. The high-precision sampling resistor of claim 1, wherein the high-precision sampling resistor is a high-precision sampling resistor with a high resistance value. The resistance material is made of manganese copper or karma alloy.

9. The high-precision sampling resistor of claim 1, wherein the high-precision sampling resistor is a high-precision sampling resistor with a high resistance value. The shell is filled with heat dissipation liquid, and the resistance body is completely immersed in the heat dissipation liquid.

10. The high-precision sampling resistor of claim 9, wherein the plurality of resistive elements are formed of a material having a positive temperature coefficient of resistance. The heat dissipation liquid is silicon oil.

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