A performance testing device for a wire-wound resistor

Abstract

The present invention belongs to the technical field of winding resistor testing equipment, and in particular relates to a performance testing device for winding resistors. In view of the problems that in the existing testing device during use, it is necessary to install the winding resistor through two nuts and a threaded rod, the operation is cumbersome, the disassembly and installation efficiency is slow, and the test box is not convenient for disassembly and assembly, and it is not convenient to take and place the winding resistor, the following solution is now proposed, which includes: a base; an isolation cover installed on the top of the base, a resistor tester is installed on one side of the isolation cover, and a mounting plate is installed on the top of the isolation cover. The structure of the present invention is simple and the operation is convenient. It can facilitate the automatic fixing, placement and wiring of the winding resistor, and at the same time can isolate the operation, and is convenient to adjust the temperature of the environment, facilitate the detection of the conductivity, and can also evenly distribute the heat entering during the detection, making the test effect more accurate and convenient for people to use.

Description

Technical Field

[0001] The present invention relates to the technical field of wire-wound resistor testing equipment, and particularly relates to a performance testing device for wire-wound resistors. Background Art

[0002] A resistor is generally directly called a resistance in daily life. It is a current-limiting component. After connecting the resistor to a circuit, the resistance value of the resistor is fixed. Generally, it has two pins, and it can limit the magnitude of the current passing through the branch it is connected to. A resistor with an unchangeable resistance value is called a fixed resistor. A resistor with a variable resistance value is called a potentiometer or a variable resistor. An ideal resistor is linear, that is, the instantaneous current passing through the resistor is proportional to the applied instantaneous voltage. Resistors are divided into many types, and wire-wound resistors are one of them. Wire-wound resistors are made by winding constantan wire, nickel-chromium wire, or manganese-copper wire on a porcelain tube or an insulating skeleton. They have a relatively large volume, but a relatively low resistance value, low noise, stable and reliable, high temperature resistance, and are widely used in high-power circuits.

[0003] A Chinese invention (Publication No.: CN213457114U) patent document discloses a performance testing device for wire-wound resistors, including a testing box body. The top of the testing box body is rotatably connected to a box cover through a hinge. The box cover and the testing box body are closed or opened through a buckle. Two threaded rods are spaced on the inner bottom surface of the testing box body. The threaded rods are matched with the pin holes at both ends of the wire-wound resistor. The lower ends of the threaded rods penetrate through the testing box body to the outside. The two threaded rods are connected to an external resistance tester through wires. A plurality of heating resistance wires are provided on the inner wall of the testing box body. A switch corresponding to each heating resistance wire is provided on the outer wall of the testing box body. The heating resistance wires are connected to the switch and the power supply wire. An electronic thermometer is provided on the side wall opposite to the switch. It can quickly and conveniently test whether the resistance value of the wire-wound resistor under high-temperature conditions is within a reasonable design range.

[0004] However, when using this testing device, it is necessary to install the wire-wound resistor on the threaded rods through two nuts. The operation is cumbersome, the disassembly and installation efficiency is slow, and the testing box is also not convenient for disassembly and assembly, making it inconvenient to take and place the wire-wound resistor. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks that when using the existing testing device, it is necessary to install the wire-wound resistor on the threaded rods through two nuts, the operation is cumbersome, the disassembly and installation efficiency is slow, and the testing box is also not convenient for disassembly and assembly, making it inconvenient to take and place the wire-wound resistor, and to propose a performance testing device for wire-wound resistors.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A performance testing device for wire-wound resistors includes:

[0008] Base;

[0009] An isolation cover is installed on the top of the base, a resistance tester is installed on one side of the isolation cover, a mounting plate is installed on the top of the isolation cover, and a display screen is provided on the mounting plate;

[0010] A wire-wound resistor body is mounted on the top of the base and is located in the isolation cover, and two wiring boards are mounted on one side of the wire-wound resistor body;

[0011] A temperature sensor is installed on an inner wall of one side of the isolation cover, and the temperature sensor is connected to the display screen;

[0012] A clamping assembly is installed on the top of the base and cooperates with the isolation cover. A first motor is installed on one side of the base, and the first motor is transmission-connected to the clamping assembly.

[0013] A clamping assembly is installed on the top of the base, cooperates with the wirewound resistor body, and is transmission-connected with the clamping assembly;

[0014] A heating assembly is installed on both sides of the isolation cover, air guide boxes are fixedly installed on the inner walls of both sides of the isolation cover, the heating assembly is located in the air guide boxes, a second motor is fixedly installed on the top inner wall of the isolation cover, a rotating rod is fixedly installed on the output shaft of the second motor, and the rotating rod is drivingly connected to the two heating assemblies;

[0015] The swing assembly is installed on the rotating rod, and the same exhaust pipe is rotatably connected between the two air guide boxes. The swing assembly is transmission-connected to the exhaust pipe, and a plurality of exhaust holes are opened at the bottom of the exhaust pipe.

[0016] Furthermore, the clamping assembly includes two clamps, which are slidably mounted on the top of the base, wedge plates are fixedly mounted on both sides of the isolation cover, and recesses are provided on both sides of the bottom of the clamps, which cooperate with the wedge plates.

[0017] Furthermore, the card-mounted assembly includes four wedge-shaped card plates, and the top of the base is slidably connected to two symmetrically arranged push plates, the four wedge-shaped card plates are fixedly connected to the corresponding two push plates, and the wedge-shaped card plates cooperate with both sides of the wound resistor body, and a positioning plate is fixedly installed on one side of the two push plates away from each other, and a metal spring is installed at the bottom of the positioning plate, and the metal spring cooperates with the corresponding terminal plate.

[0018] Further, two symmetrically arranged moving grooves and two symmetrically arranged sliding grooves are formed in the top of the base. A same driving rod is rotatably connected between the two moving grooves and the two sliding grooves. Four symmetrically arranged threads are provided on the driving rod. A moving block is slidably connected to the inner wall of the moving groove, and a slider is slidably connected to the inner wall of the sliding groove. The two moving blocks and the two sliders are all threadedly connected to the driving rod. The driving rod is fixedly connected to the output shaft of the first motor, and the slider is fixedly connected to the corresponding clamping plate.

[0019] Further, a fixing block is fixedly installed on the top of the moving block. A sliding rod is slidably connected to the fixing block. The sliding rod is slidably connected to the corresponding pushing plate. A top spring is fixedly installed on one side of the fixing block. One end of the top spring is fixedly connected to the corresponding pushing plate. The other end of the sliding rod is fixedly installed with a baffle.

[0020] Further, the heating assembly includes an electric heating ring. Three fixing rods are fixedly installed on the inner wall of the air guiding box. The electric heating ring is fixedly connected to the three fixing rods.

[0021] Further, an installation rod is fixedly installed on the inner wall of the air guiding box. A same rotating shaft is rotatably connected between the two installation rods. Fan blades are fixedly installed at the mutually remote ends of the two rotating shafts. The fan blades cooperate with the corresponding electric heating rings.

[0022] Further, a first bevel gear is fixedly installed at the bottom end of the rotating rod. A second bevel gear is fixedly installed on the rotating shaft. The first bevel gear meshes with the second bevel gear. A positioning box is rotatably connected to the rotating rod. The positioning box is rotatably connected to the rotating shaft.

[0023] Further, the swinging assembly includes a rotating roller. The rotating roller is fixedly installed on the rotating rod. A positioning seat is fixedly installed on one side of the positioning box. A moving rod is slidably connected to the positioning seat. Two clamping rods are fixedly installed on one side of the moving rod. A circular cam plate is fixedly installed on the rotating roller. The two clamping rods are located on the upper and lower sides of the circular cam plate.

[0024] Further, a rack is fixedly installed on the moving rod. A positioning gear is fixedly installed on the exhaust pipe. The positioning gear meshes with the rack.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] (1) In this solution, due to the threaded connection between the driving rod and the two sliders, and the mutual cooperation between the concave notch on the clamping plate and the corresponding wedge-shaped plate, the rotating driving rod can drive the clamping plate to install and fix the isolation cover;

[0027] (2) In this solution, due to the threaded connection between the driving rod and the two moving blocks, and the setting of the top spring on the fixed block, the rotating driving rod can drive the push plate to move, thereby clamping and positioning both sides of the wire-wound resistor body through the wedge-shaped clamping plate, and at the same time, it can also drive the metal elastic sheet to contact the corresponding wiring board;

[0028] (3) In this solution, due to the meshing of the first bevel gear and the second bevel gear, and the setting of the electric heating ring, the rotating rotating rod can conduct the heat generated on the electric heating ring, thereby changing the temperature environment of this wire-wound resistor body, and then facilitating the detection of its electrical conductivity at different temperatures;

[0029] (4) In this solution, due to the mutual cooperation between the circular inclined disk and the two clamping rods, and the meshing of the rack and the positioning gear, the rotating rotating rod can drive the exhaust pipe to change the angle back and forth, preventing the gas temperature from acting on the same place and affecting the test effect of the wire-wound resistor body.

[0030] The structure of the present invention is simple and the operation is convenient. It can facilitate the automatic fixing, placement and wiring of the wire-wound resistor. At the same time, it can also isolate the operation, and is convenient to adjust the temperature of the environment, facilitate the detection of electrical conductivity, and can evenly distribute the incoming heat during the detection, making the test effect more accurate and convenient for people to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a performance testing device for a wire-wound resistor proposed by the present invention;

[0032] Figure 2 is a rear view structural diagram of a performance testing device for a wire-wound resistor proposed by the present invention;

[0033] Figure 3 is a schematic internal structure diagram of the isolation cover of a performance testing device for a wire-wound resistor proposed by the present invention;

[0034] Figure 4 is a schematic bottom view structural diagram of the isolation cover of a performance testing device for a wire-wound resistor proposed by the present invention;

[0035] Figure 5 is a schematic top view structural diagram of the base of a performance testing device for a wire-wound resistor proposed by the present invention;

[0036] Figure 6 is a schematic transmission connection structure diagram of the second motor, the exhaust pipe and the fan blade of a performance testing device for a wire-wound resistor proposed by the present invention;

[0037] Figure 7Schematic diagram of the transmission connection structure of the second motor, exhaust duct and rotating shaft of a performance testing device for a wire-wound resistor proposed by the present invention;

[0038] Figure 8 Schematic diagram of the transmission connection structure of the rotating rod and the rotating shaft of a performance testing device for a wire-wound resistor proposed by the present invention;

[0039] Figure 9 Schematic diagram of the exhaust duct structure of a performance testing device for a wire-wound resistor proposed by the present invention;

[0040] Figure 10 Schematic diagram of the heating component structure of a performance testing device for a wire-wound resistor proposed by the present invention;

[0041] Figure 11 Schematic diagram of the wire-wound resistor body structure of a performance testing device for a wire-wound resistor proposed by the present invention;

[0042] Figure 12 Schematic diagram of the clamping plate structure of a performance testing device for a wire-wound resistor proposed by the present invention;

[0043] Figure 13 Schematic diagram of the metal elastic sheet structure of a performance testing device for a wire-wound resistor proposed by the present invention;

[0044] Figure 14 Schematic diagram of the structure of part A of a performance testing device for a wire-wound resistor proposed by the present invention;

[0045] Figure 15 Schematic diagram of the structure of part B of a performance testing device for a wire-wound resistor proposed by the present invention.

[0046] In the figure: 1. Base; 2. Wire-wound resistor body; 3. Wiring board; 4. Isolation cover; 5. Resistance tester; 6. Mounting plate; 7. Display screen; 8. Clamping plate; 9. Wedge plate; 10. Notch; 11. Pushing plate; 12. Wedge-shaped clamping plate; 13. Positioning plate; 14. Metal elastic sheet; 15. Moving groove; 16. Sliding groove; 17. Driving rod; 18. First motor; 19. Moving block; 20. Slider; 21. Fixed block; 22. Slide bar; 23. Baffle; 24. Top spring; 25. Air guide box; 26. Mounting rod; 27. Rotating shaft; 28. Fan blade; 29. Exhaust duct; 30. Exhaust hole; 31. Fixed rod; 32. Electric heating ring; 33. Second motor; 34. Rotating rod; 35. Positioning box; 36. First bevel gear; 37. Second bevel gear; 38. Positioning seat; 39. Moving rod; 40. Rack; 41. Positioning gear; 42. Rotating roller; 43. Circular inclined disk; 44. Clamping rod; 45. Temperature sensor; 46. Dust-proof net. Detailed implementation manners

[0047] Next, the technical solutions in this embodiment will be clearly and completely described in conjunction with the accompanying drawings in this embodiment. Obviously, the described embodiments are only a part of the embodiments of this example, rather than all of the embodiments.

[0048] Embodiment 1

[0049] Referring to Figures 1 - 15 , a performance testing device for a wire-wound resistor, comprising:

[0050] Base 1;

[0051] An isolation cover 4 is installed on the top of the base 1. A resistor tester 5 is installed on one side of the isolation cover 4. A mounting plate 6 is installed on the top of the isolation cover 4, and a display screen 7 is provided on the mounting plate 6;

[0052] The wire-wound resistor body 2 is installed on the top of the base 1 and is located inside the isolation cover 4. Two wiring boards 3 are installed on one side of the wire-wound resistor body 2;

[0053] A temperature sensor 45 is installed on the inner wall of one side of the isolation cover 4, and the temperature sensor 45 is connected to the display screen 7;

[0054] A clamping assembly is installed on the top of the base 1 and cooperates with the isolation cover 4. A first motor 18 is installed on one side of the base 1, and the first motor 18 is drivingly connected to the clamping assembly;

[0055] A clamping component is installed on the top of the base 1, cooperates with the wire-wound resistor body 2, and is simultaneously drivingly connected to the clamping assembly;

[0056] A heating assembly is installed on both sides of the isolation cover 4. Air guide boxes 25 are fixedly installed on the inner walls of both sides of the isolation cover 4. The heating assembly is located inside the air guide boxes 25. A second motor 33 is fixedly installed on the inner wall of the top of the isolation cover 4. A rotating rod 34 is fixedly installed on the output shaft of the second motor 33, and the rotating rod 34 is drivingly connected to the two heating assemblies;

[0057] A swinging assembly is installed on the rotating rod 34. The same exhaust pipe 29 is rotatably connected between the two air guide boxes 25. The swinging assembly is drivingly connected to the exhaust pipe 29, and a plurality of exhaust holes 30 are opened at the bottom of the exhaust pipe 29.

[0058] In this embodiment, the clamping assembly includes two clamping plates 8. The two clamping plates 8 are slidably installed on the top of the base 1. Wedge-shaped plates 9 are fixedly installed on both sides of the isolation cover 4. Concave openings 10 are provided on both sides of the bottom of the clamping plate 8. The concave openings 10 cooperate with the wedge-shaped plates 9. The two clamping plates 8 close to each other can push and press the wedge-shaped plates 9 through the cooperation of the concave openings 10 and the wedge-shaped plates 9, so as to automatically fix and install the isolation cover 4.

[0059] In this embodiment, the clamping assembly includes four wedge-shaped clamping plates 12. Two symmetrically arranged push plates 11 are slidably connected to the top of the base 1. The four wedge-shaped clamping plates 12 are fixedly connected to the corresponding two push plates 11, and the wedge-shaped clamping plates 12 cooperate with both sides of the wire-wound resistor body 2. Positioning plates 13 are fixedly installed on the mutually remote sides of the two push plates 11. A metal elastic piece 14 is installed at the bottom of the positioning plate 13. The metal elastic piece 14 cooperates with the corresponding wiring board 3. A fixing block 21 is fixedly installed on the top of the moving block 19. A sliding rod 22 is slidably connected to the fixing block 21. The sliding rod 22 is slidably connected to the corresponding push plate 11. A top spring 24 is fixedly installed on one side of the fixing block 21. One end of the top spring 24 is fixedly connected to the corresponding push plate 11. A baffle 23 is fixedly installed at the other end of the sliding rod 22. The two mutually remote push plates 11 drive the wedge-shaped clamping plates 12 to move. The wedge-shaped clamping plates 12 cooperate through the side plates of the wire-wound resistor body 2, so as to be able to clamp and fix the wire-wound resistor body 2. At the same time, the moving push plates 11 drive the metal elastic pieces 14 to move, so that the metal elastic pieces 14 are in contact with the wiring board 3, and thus the wiring test can be automatically carried out. At the same time, the sliding connection between the sliding rod 22 and the push plate 11 and the action of the top spring 24 on the push plate 11 enable the wedge-shaped clamping plates 12 to have a telescopic buffer margin when clamping wire-wound resistor bodies 2 of different sizes and lengths, and thus can adapt to the installation and placement of more wire-wound resistor bodies 2 of different sizes.

[0060] In this embodiment, two symmetrically arranged moving grooves 15 and two symmetrically arranged sliding grooves 16 are formed in the top of the base 1. The same driving rod 17 is rotatably connected between the two moving grooves 15 and the two sliding grooves 16. Four symmetrically arranged threads are provided on the driving rod 17. A moving block 19 is slidably connected to the inner wall of the moving groove 15. A slider 20 is slidably connected to the inner wall of the sliding groove 16. The two moving blocks 19 and the two sliders 20 are all threadedly connected to the driving rod 17. The driving rod 17 is fixedly connected to the output shaft of the first motor 18. The slider 20 is fixedly connected to the corresponding clamping plate 8. The symmetric arrangement of the four threads on the driving rod 17 enables the rotating driving rod 17 to drive the two sliders 20 to move in opposite directions respectively, and the two moving blocks 19 move in opposite directions and are limited by the moving groove 15 and the sliding groove 16.

[0061] In this embodiment, the heating component includes an electric heating ring 32. Three fixing rods 31 are fixedly installed on the inner wall of the air guide box 25. The electric heating ring 32 is fixedly connected to the three fixing rods 31. An installation rod 26 is fixedly installed on the inner wall of the air guide box 25. The same rotating shaft 27 is rotatably connected between the two installation rods 26. Blades 28 are fixedly installed at the ends of the two rotating shafts 27 away from each other. The blades 28 cooperate with the corresponding electric heating ring 32. When the electric heating ring 32 is powered on, it generates heat, so that the wind generated when the blades 28 rotate acts on the electric heating ring 32 and is finally introduced into the isolation cover 4 for space heating.

[0062] In this embodiment, a first bevel gear 36 is fixedly installed at the bottom end of the rotating rod 34. A second bevel gear 37 is fixedly installed on the rotating shaft 27. The first bevel gear 36 meshes with the second bevel gear 37. The positioning box 35 is rotatably connected to the rotating rod 34, and the positioning box 35 is rotatably connected to the rotating shaft 27. The rotating rotating rod 34 drives the rotating shaft 27 to rotate through the meshing of the first bevel gear 36 and the second bevel gear 37, and then drives the two blades 28 to rotate and blow air.

[0063] In this embodiment, the swinging component includes a rotating roller 42. The rotating roller 42 is fixedly installed on the rotating rod 34. A positioning seat 38 is fixedly installed on one side of the positioning box 35. A moving rod 39 is slidably connected to the positioning seat 38. Two clamping rods 44 are fixedly installed on one side of the moving rod 39. A circular inclined disk 43 is fixedly installed on the rotating roller 42. The two clamping rods 44 are located on the upper and lower sides of the circular inclined disk 43. The two clamping rods 44 are arranged on the upper and lower sides of the circular inclined disk 43, so that the vertical drop generated when the circular inclined disk 43 rotates can act on the clamping rods 44, thereby driving the moving rod 39 to move up and down.

[0064] In this embodiment, a rack 40 is fixedly installed on the moving rod 39. A positioning gear 41 is fixedly installed on the exhaust pipe 29. The positioning gear 41 meshes with the rack 40. The moving moving rod 39 drives the exhaust pipe 29 to change the angle back and forth through the meshing of the rack 40 and the positioning gear 41, and then blows and heats more spaces in the isolation cover 4 back and forth, thereby increasing the heat uniformity and preventing too much heat from acting on a certain part of the wire-wound resistor body 2, which affects the test effect.

[0065] Working principle: During operation, place the wire-wound resistor body 2 and the isolation cover 4 on the base 1. Start the switch of the first motor 18. The output shaft of the first motor 18 drives the driving rod 17 to rotate. The four symmetrically arranged threads on the driving rod 17 enable the rotating driving rod 17 to drive two sliders 20 to move in opposite directions respectively, and two moving blocks 19 to move in opposite directions, thereby driving the clamping plate 8 and the push plate 11 to move. Limited by the moving groove 15 and the sliding groove 16, the two mutually approaching clamping plates 8 cooperate with the notch 10 and the wedge plate 9 to be able to squeeze and press the wedge plate 9, and then can automatically fix and install the isolation cover 4. The two mutually separating push plates 11 drive the wedge-shaped clamping plate 12 to move. The wedge-shaped clamping plate 12 cooperates with the side plates of the wire-wound resistor body 2 to be able to clamp and fix the wire-wound resistor body 2. At the same time, the moving push plate 11 drives the metal elastic sheet 14 to move, so that the metal elastic sheet 14 contacts the wiring board 3, and then can automatically conduct wiring tests. At the same time, the sliding rod 22 is slidably connected to the push plate 11, and the action of the top spring 24 on the push plate 11 enables the wedge-shaped clamping plate 12 to have a telescopic buffer margin when clamping wire-wound resistor bodies 2 of different sizes and lengths, and then can adapt to the installation and placement of wire-wound resistor bodies 2 of more different sizes. Then start the switch of the second motor 33. The output shaft of the second motor 33 drives the rotating rod 34 to rotate. The rotating rotating rod 34 drives the rotating shaft 27 to rotate through the meshing of the first bevel gear 36 and the second bevel gear 37, and then can drive two fan blades 28 to rotate and blow air. Under the cooperation of the electric heating ring 32, the inside of the isolation cover 4 can be heated. At the same time, a controller is provided inside the isolation cover 4. The setting of the controller can adjust the heat of the electric heating ring 32, and then can adjust the temperature inside the isolation cover 4 for convenient testing. At the same time, the rotating rotating rod 34 drives the circular inclined disk 43 to rotate through the roller 42. The up and down drop generated when the circular inclined disk 43 rotates can act on the clamping rod 44, so as to drive the moving rod 39 to move up and down. The moving moving rod 39 drives the air discharge pipe 29 to change the angle back and forth through the meshing of the rack 40 and the positioning gear 41, and then can blow air and heat more spaces inside the isolation cover 4 back and forth, so as to increase the uniformity of heat and prevent too much heat from acting on a certain part of the wire-wound resistor body 2 and affecting the test effect.

[0066] Embodiment 2

[0067] The difference between this embodiment and Embodiment 1 is that a dust-proof net 46 is installed on the inner wall of the air guide box 25. The setting of the dust-proof net 46 can isolate dust inside the isolation cover 4, preventing some floating dust and flocs from sticking to the wire-wound resistor body 2 during testing and affecting the test. All structures in this application can be selected for materials and lengths according to actual usage conditions. The attached drawings are all schematic structural diagrams, and the specific actual dimensions can be appropriately adjusted.

[0068] As described above, it is only the preferred specific implementation manner of this embodiment. However, the protection scope of this embodiment is not limited thereto. Any person skilled in the art within the technical scope disclosed by this embodiment, making equivalent substitutions or changes according to the technical solution and inventive concept of this embodiment, shall be covered by the protection scope of this embodiment.

Claims

1. A performance testing device for a wire-wound resistor, characterized in that, include: Base (1); An isolation cover (4) is mounted on the top of the base (1), a resistance tester (5) is mounted on one side of the isolation cover (4), a mounting plate (6) is mounted on the top of the isolation cover (4), and a display screen (7) is provided on the mounting plate (6); A wire-wound resistor body (2) is mounted on the top of the base (1) and is located inside the isolation cover (4); two wiring boards (3) are mounted on one side of the wire-wound resistor body (2); A temperature sensor (45) is mounted on an inner wall of one side of the isolation cover (4), and the temperature sensor (45) is connected to the display screen (7); A clamping assembly is mounted on the top of the base (1) and cooperates with the isolation cover (4); a first motor (18) is mounted on one side of the base (1), and the first motor (18) is in driving connection with the clamping assembly; the clamping assembly comprises two clamping plates (8), the two clamping plates (8) are slidably mounted on the top of the base (1), wedge plates (9) are fixedly mounted on both sides of the isolation cover (4), and notches (10) are provided on both sides of the bottom of the clamping plates (8), and the notches (10) cooperate with the wedge plates (9); A card assembly is installed on the top of the base (1), cooperates with the wire-wound resistor body (2), and is transmission-connected to the clamping assembly; the card assembly comprises four wedge-shaped card plates (12), the top of the base (1) is slidably connected to two symmetrically arranged push plates (11), the four wedge-shaped card plates (12) are fixedly connected to the corresponding two push plates (11), and the wedge-shaped card plates (12) cooperate with the two sides of the wire-wound resistor body (2), a positioning plate (13) is fixedly installed on the side of the two push plates (11) away from each other, a metal spring (14) is installed on the bottom of the positioning plate (13), and the metal spring (14) cooperates with the corresponding wiring board (3); A heating assembly is mounted on both sides of the isolation cover (4); air guide boxes (25) are fixedly mounted on the inner walls of both sides of the isolation cover (4); the heating assembly is located inside the air guide boxes (25); a second motor (33) is fixedly mounted on the top inner wall of the isolation cover (4); a rotating rod (34) is fixedly mounted on the output shaft of the second motor (33); and the rotating rod (34) is drivingly connected to the two heating assemblies; A swing assembly is mounted on the rotating rod (34); a same exhaust pipe (29) is rotatably connected between the two air guide boxes (25); the swing assembly is transmission-connected to the exhaust pipe (29); and a plurality of exhaust holes (30) are provided at the bottom of the exhaust pipe (29).

2. The performance testing device for a wire-wound resistor according to claim 1, characterized in that, Two symmetrically arranged moving grooves (15) and two symmetrically arranged sliding grooves (16) are formed in the top of the base (1). A same driving rod (17) is rotatably connected between the two moving grooves (15) and the two sliding grooves (16). Four symmetrically arranged threads are provided on the driving rod (17). A moving block (19) is slidably connected to the inner wall of the moving groove (15), and a slider (20) is slidably connected to the inner wall of the sliding groove (16). The two moving blocks (19) and the two sliders (20) are all threadedly connected to the driving rod (17). The driving rod (17) is fixedly connected to the output shaft of the first motor (18). The slider (20) is fixedly connected to the corresponding clamping plate (8).

3. The performance testing device for a wire-wound resistor according to claim 2, wherein, A fixing block (21) is fixedly installed on the top of the moving block (19). A sliding rod (22) is slidably connected to the fixing block (21). The sliding rod (22) is slidably connected to the corresponding push plate (11). A top spring (24) is fixedly installed on one side of the fixing block (21). One end of the top spring (24) is fixedly connected to the corresponding push plate (11). A baffle (23) is fixedly installed at the other end of the sliding rod (22).

4. The performance testing device for a wire-wound resistor according to claim 3, characterized in that, The heating assembly includes an electric heating ring (32). Three fixing rods (31) are fixedly installed on the inner wall of the air guide box (25). The electric heating ring (32) is fixedly connected to the three fixing rods (31).

5. The performance testing device for a wire-wound resistor according to claim 4, wherein An installation rod (26) is fixedly installed on the inner wall of the air guide box (25). A same rotating shaft (27) is rotatably connected between the two installation rods (26). A fan blade (28) is fixedly installed at each end of the two rotating shafts (27) away from each other. The fan blade (28) cooperates with the corresponding electric heating ring (32).

6. The performance testing device for a wire-wound resistor according to claim 5, wherein, A first bevel gear (36) is fixedly installed at the bottom end of the rotating rod (34). A second bevel gear (37) is fixedly installed on the rotating shaft (27). The first bevel gear (36) meshes with the second bevel gear (37). A positioning box (35) is rotatably connected to the rotating rod (34). The positioning box (35) is rotatably connected to the rotating shaft (27).

7. The performance testing device for a wire-wound resistor according to claim 6, characterized in that, The swinging assembly includes a rotating roller (42). The rotating roller (42) is fixedly installed on the rotating rod (34). A positioning seat (38) is fixedly installed on one side of the positioning box (35). A moving rod (39) is slidably connected to the positioning seat (38). Two clamping rods (44) are fixedly installed on one side of the moving rod (39). A circular inclined disk (43) is fixedly installed on the rotating roller (42). The two clamping rods (44) are located on the upper and lower sides of the circular inclined disk (43).

8. The performance testing device for a wire-wound resistor according to claim 7, characterized in that, A rack (40) is fixedly installed on the moving rod (39). A positioning gear (41) is fixedly installed on the exhaust duct (29). The positioning gear (41) meshes with the rack (40).

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