Reactive load vehicle gauge level power component test tool

Abstract

The invention relates to the technical field of vehicle gauge level power component detection, and discloses a reactive load vehicle gauge level power component test tool, which comprises a test cabinet, a sliding table and a mounting table, and is characterized in that the sliding table is mounted in the test cabinet through a horizontal sliding pair and can partially extend out of the test cabinet along the length direction of the sliding table, and a support box with a top opening is fixed at the upper end of the sliding table; the mounting table is fixedly embedded in the opening of the supporting box, a pair of mounting shafts is rotationally mounted on the mounting table, and the area between the mounting shafts is a placement station of the vehicle-specification-level power component; at least two clamps are uniformly mounted on the mounting shaft at intervals in the circumferential direction; the at least two clamps on the same clamping component are used for clamping the vehicle gauge-level power components with different sizes; the vehicle gauge-level power components with different sizes can be clamped and positioned, and the practicability is high; when the power is suddenly cut off, the spring can automatically slide the vehicle-gauge-level power component away from the test probe, so that negative effects on the vehicle-gauge-level power component caused by sudden power-on after the power is cut off are avoided.

Description

Technical Field

[0001] This invention relates to the field of automotive-grade power component testing technology, specifically to a reactive load automotive-grade power component testing fixture. Background Technology

[0002] When testing automotive-grade power components with reactive loads, the component is positioned using a fixture, and the pins are held in place by pin clamps. Test probes are then used to contact the pins to acquire test signals. During testing, the test current gradually increases until it stabilizes, meaning the current change is controllable. Existing fixtures are only suitable for automotive-grade power components of the same size, and their practicality needs improvement. Furthermore, while existing pin clamps can open when power is off, the opening angle is small due to spacing and size limitations. Additionally, the automotive-grade power component cannot quickly move away from the pin clamp after power is off, resulting in uncontrollable current changes when power is suddenly restored. This can easily lead to arcing due to insufficient spacing between the pins of the automotive-grade power component and the pin clamps, endangering the safety of the component. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a test fixture for automotive-grade power components under reactive load, which can effectively solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a test fixture for automotive-grade power components under reactive load, comprising a test cabinet, a slide table, and a mounting table. The slide table is mounted inside the test cabinet via a horizontal sliding pair and can partially extend out of the test cabinet along its length. A support box with a top opening is fixed to the upper end of the slide table. The mounting table is fixedly embedded in the opening of the support box. A pair of mounting shafts are rotatably mounted on the mounting table, and the area between them is the placement station for automotive-grade power components. At least two clamps are evenly spaced along the circumference on the mounting shafts. At least two clamps on the same clamping component are used to clamp automotive-grade power components of different sizes. It also includes a transmission block and a cylinder; the transmission block is fixed at the lower end of the slide table, the cylinder extends along the sliding direction of the slide table, a magnet is slidably installed on the outside of the cylinder through a sliding sleeve, and piston one, piston two and a spring are provided inside the cylinder. Piston one and piston two are rotatably connected, piston one can rotate relative to piston two, piston two is magnetically connected to the magnet and abuts against the spring; the end of the transmission block facing into the test cabinet can abut against the sliding sleeve. It also includes a linear motor module, an electromagnet, a spring post, and a mounting plate. The linear motor module is vertically installed inside the test cabinet. The electromagnet is fixed to the moving end of the linear motor module. The electromagnet has a vertically extendable moving end. The moving end of the electromagnet is mounted on the spring post through the mounting plate. The moving end of the spring post is pluggably embedded into the transmission block to keep the spring in a compressed state.

[0005] Preferably, the cylinder is filled with hydraulic oil, and multiple adjustment holes are evenly opened on the piston one along the circumference. The diameters of the multiple adjustment holes decrease sequentially. A guide hole is opened on the piston two. The diameter of the guide hole is larger than the diameter of the adjustment holes. The multiple adjustment holes are connected to the guide hole sequentially through the rotation of the piston one.

[0006] Preferably, it also includes a guide rod, which is disposed inside the cylinder and passes through piston one, piston two and spring. Piston one forms a slidable connection with the guide rod through a keyway. Both ends of the guide rod protrude from the cylinder and can rotate according to the rotation of the mounting shaft.

[0007] Preferably, it also includes a housing and an electromagnet; The box body is fixedly connected to the guide rod. A ratchet is fixedly sleeved on the outer circumference of the box body. A coil spring is coaxially installed inside the box body. The outer ring of the coil spring is fixedly connected to the inner wall of the box body. The inner ring of the coil spring is fixedly connected to the fixing frame. The fixing frame is fixedly connected to the test cabinet. Electromagnet 2 has a horizontally extendable movable end, and the movable end of electromagnet 1 is fixedly connected to a limiting plate, which engages with a ratchet.

[0008] Preferably, the coil spring is in a pre-compressed state.

[0009] Preferably, when the coil spring is in a pre-compressed state, the adjustment hole with the largest diameter is fully connected to the guide hole.

[0010] Preferably, a limiting post is fixed on the fixing frame to prevent the coil spring from changing from a pre-compressed state to a naturally relaxed state.

[0011] Compared with the prior art, the present invention provides a test fixture for automotive-grade power components under reactive load, which has the following advantages: 1. It can clamp and position automotive-grade power components of different sizes, making it highly practical; by setting a spring, and compressing and deforming the spring during the process of sliding the automotive-grade power component into the test cabinet, the spring force can assist the automotive-grade power component in sliding out of the test cabinet when it is necessary; by setting electromagnet one and electromagnet two, the spring can automatically slide the automotive-grade power component away from the test probe in the event of a sudden power failure, avoiding the negative impact of sudden power restoration on the automotive-grade power component after a power failure.

[0012] 2. The spring's rebound force can be matched to the size of automotive-grade power components to ensure that the rebound acceleration and speed are basically consistent, avoiding impact or slippage failure; in the event of a sudden power failure, the spring's rebound force can return to its maximum value, enabling the automotive-grade power components to quickly slide away from the test probe, avoiding arcing due to insufficient spacing between the pins and pin clips of the automotive-grade power components when power is suddenly restored after a power failure, thus ensuring the safety of automotive-grade power components after power failure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the support box; Figure 3 This is a schematic diagram of the clamping component. Figure 4 for Figure 2 Schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the internal structure of the springback component; Figure 6 This is a partial structural diagram of the adjusting component; Figure 7 for Figure 5 Schematic diagram of the structure at point B.

[0014] The components include: 1. Slide table; 2. Support box; 3. Mounting platform; 301. Mounting cavity; 4. Clamping component; 41. Mounting shaft; 411. Drive gear; 42. Fixture; 421. Mounting block; 422. Top block; 423. Clamping block; 424. Rack; 425. Linkage gear; 426. Tension spring; 43. Drive shaft; 44. Manual wheel; 45. Positioning pin; 451. Spring; 5. Transmission block; 6. Return spring; 61. Cylinder; 62. Guide rod; 63. Sliding sleeve; 64. Magnet; 65. Piston assembly; 651, Piston 1; 652, Piston 2; 66, Spring; 7, Mounting plate; 8, Connecting bracket; 9, Spring post; 10, Electromagnet 1; 11, Adjusting component 1; 111, Drive shaft 1; 112, Drive shaft 2; 113, Drive shaft 3; 114, Drive gear 1; 115, Drive gear 2; 12, Adjusting component 2; 121, Housing; 122, Fixing bracket; 123, Coil spring; 124, Ratchet; 125, Electromagnet 2; 126, Limiting plate; 127, Limiting post. Detailed Implementation

[0015] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1 to 7 A test fixture for automotive-grade power components with reactive loads, comprising a test cabinet, a slide table 1, and a mounting platform 3.

[0017] The slide table 1 is installed inside the test cabinet via a horizontal sliding pair, such as a slider rail mechanism, and can extend partially out of the test cabinet along its length. The upper end of the slide table 1 is fixed with a support box 2 with a top opening. The mounting platform 3 is fixedly embedded in the opening of the support box 2. The mounting platform 3 is provided with a pair of clamping components 4, and the area between them is the placement station for automotive-grade power components. The length direction of the placement station is parallel to the length direction of the automotive-grade power components and perpendicular to the length direction of the slide table 1.

[0018] The clamping component 4 includes a mounting shaft 41 and a clamp 42. The mounting shaft 41 extends along the sliding direction of the slide table 1, and a mounting opening for mounting the clamp 42 is provided at the center of the outer circumferential surface of the mounting shaft 41. The clamp 42 includes a mounting block 421, a top block 422, and a pair of clamping blocks 423. The mounting block 421 is fixed to the mounting opening by bolts, and one end of the mounting block 421 is aligned with the automotive-grade power component and has the top block 422 embedded therein. The side of the top block 422 away from the mounting block 421 is a contact surface for abutting against the automotive-grade power component along its length. The two clamping blocks 423 are respectively located on both sides of the mounting block 421, and a rack 424 is fixed to the opposite surface of each of the two clamping blocks 423. The two racks 424 slide through the mounting block 421, and the two racks 424 are connected together by a linkage gear 425 located in the mounting block 421. A tension spring 426 is provided between each of the two clamping blocks 423 and the mounting block 421. The tension spring 426 is used to provide force for the clamping blocks 423 to press against the surface of the automotive-grade power component along its width.

[0019] When the automotive-grade power component is clamped and positioned by the clamps 42 on both sides of the placement station, the abutting surfaces of the two mating top blocks 422 abut against the two ends of the automotive-grade power component in the length direction, and the two clamping blocks 423 on the same clamp 42 work together to clamp the automotive-grade power component under the action of the tension of the two tension springs 426.

[0020] More specifically, each side of the mounting platform 3 located at the placement station is provided with a mounting cavity 301 for mounting the clamping component 4, and the mounting shaft 41 is fixedly installed in the mounting cavity 31 or rotatably installed in the mounting cavity 301.

[0021] When the mounting shaft 41 is fixed in the mounting cavity 31, there is only one mounting port on each mounting shaft 41, and a pair of clamping parts 4 can only be used to clamp and position automotive-grade power components of the same size.

[0022] When the mounting shaft 41 is rotatably installed in the mounting cavity 301, that is, when the mounting shaft 41 is rotatably connected to the mounting platform 3, each mounting shaft 41 has at least two mounting ports, and the at least two mounting ports are evenly spaced along the circumference of the mounting shaft 41. Each mounting port is equipped with a mounting block 421, that is, the same clamping component 4 has at least two clamps 42 for clamping automotive-grade power components.

[0023] Furthermore, when the mounting shaft 41 is rotatably installed in the mounting cavity 301, in the same clamping component 4, the distance from the abutting surface of different top blocks 422 to the mounting block 421 is different, and the width of the automotive-grade power components that different pairs of clamping blocks 423 can clamp and position is inconsistent. By rotating the mounting shaft 41, different clamps 42 can be rotated to the position for clamping and positioning automotive-grade power components; in the same pair of clamping components 4, the two matching clamps 42 cooperate to clamp and position automotive-grade power components of the same size.

[0024] Furthermore, when the mounting shaft 41 is rotatably mounted within the mounting cavity 301, each clamping component 4 also includes a rotation drive for driving the mounting shaft 41 to rotate, the rotation drive comprising: The drive gear 411 is coaxially fixed to one end of the mounting shaft 41; The drive shaft 43 is arranged parallel to the mounting shaft 41 below, with one end passing through and rotatably connected to the support box 2, and the other end meshing with the drive gear 411; The manual wheel 44 is coaxially fixed on the drive shaft 43 located outside the support box 2, and is used to drive the drive shaft 43 to rotate; The positioning pin 45 is detachably inserted into the manual wheel 44 at one end, and is fixedly connected to the support box 2 at the other end via a spring piece 451.

[0025] Multiple positioning pins 45 are provided, and the multiple positioning pins 45 are evenly distributed along the circumference of the mounting shaft 41 so that the clamp 42 can be positioned after the clamp 42 is adjusted to different positions by rotating the mounting shaft 41.

[0026] In summary, the present invention increases practicality by having each clamping component 4 have at least one clamp 42, and different clamps 42 on the same clamping component 4 correspond to automotive-grade power components of different sizes.

[0027] As a further explanation of the above technical solution, before the test, the slide table 1 is manually pushed into the test cabinet to move the automotive-grade power component to the test position. After the test, the slide table 1 is first automatically partially slid out by the push of the spring mechanism, and then manually pulled out to completely remove the automotive-grade power component from the test cabinet.

[0028] The springback component includes a transmission block 5 and a springback element 6; The transmission block 5 is fixed to the lower end of the slide table 1; The spring-loaded component 6 includes a cylinder 61 and a guide rod 62. The cylinder 61 is fixed inside the test cabinet and extends along the sliding direction of the slide table 1. Both ends of the cylinder 61 are closed. A sliding sleeve 63 is slidably fitted on the outer surface of the cylinder 61. A ring magnet 64 is coaxially embedded in the sliding sleeve 63. A piston assembly 65 and a spring 66 are provided inside the cylinder 61. The piston assembly 65 and the spring 66 are arranged sequentially along the direction in which the slide table 1 slides into the test cabinet. The piston assembly 65 is magnetically connected to the magnet 64. The sliding sleeve 63 is the moving end of the spring-loaded component 6. The guide rod 62 is disposed inside the cylinder 61 and extends axially along the cylinder 61. The guide rod 62 passes through the piston assembly 65 and the spring 66. Both ends of the guide rod 62 protrude from the cylinder 61 and form a sealed connection with the cylinder 61. The end of the transmission block 5 facing the inside of the test cabinet can abut against the sliding sleeve 63, so that when the slide table 1 slides into the test cabinet, the transmission block 5 can push the sliding sleeve 63 to slide, thereby realizing the sliding of the piston assembly 65 and compressing the spring 66, accumulating elastic potential energy to push the transmission block 5 to slide out of the test cabinet.

[0029] The elastic potential energy obtained by the spring 66 through compression is used to push part of the slide table 1 out of the test cabinet.

[0030] Since spring 66 should be kept in a compressed state during the testing of automotive-grade power components, it is necessary to position spring 66 using positioning components after slide 1 has slid fully into the test cabinet.

[0031] The positioning components include a linear motor module, a mounting plate 7, a connecting frame 8, a spring post 9, and an electromagnet 10. The linear motor module is vertically installed inside the test cabinet, and the moving end of the linear motor module is fixedly connected to the electromagnet 10. The electromagnet 10 has a vertically extendable moving end, which is fixedly connected to the mounting plate 7. The mounting plate 7 is used to install test probes and pin clips. The connecting frame 8 is fixedly connected to the mounting plate 7. The lower end of the connecting frame 8 extends towards the spring return member 6 and is embedded with the spring post 9. The fixed end of the spring post 9 is fixedly connected to the connecting frame 8. The moving end of the spring post 9 is pluggably embedded into the transmission block 5 to keep the spring 66 in a compressed state.

[0032] When the slide 1 is fully slid into the test cabinet, the spring column 9 is embedded in the transmission block 5.

[0033] It should be noted that the extension and retraction of the spring column 9 provides space for the mounting plate 7 to be moved further down, allowing the test probe to be electrically connected to the pins of the automotive-grade power component.

[0034] It should be noted that when energized, the telescopic end of electromagnet 10 retracts, and when de-energized, the telescopic end of electromagnet 10 extends. This allows the test probe to detach from the pins of the automotive-grade power component and the spring column 9 to detach from the transmission block 5 when the power is off. Consequently, when the power is off, the spring 66 rebounds and slides part of the slide table 1 out of the test cabinet, achieving the effect of keeping the automotive-grade power component away from the test probe.

[0035] It should also be noted that, when powered on, the test probe is disconnected from the pins of the automotive-grade power component and the spring post 9 is disconnected from the transmission block 5 through the linear motor module.

[0036] As a further explanation of the above technical solution, since the clamping component 4 can clamp automotive-grade power components with different positioning dimensions, and the weight of the automotive-grade power components varies with their size, the rebound force of the rebound component needs to be matched according to the size of the automotive-grade power components to ensure that the rebound acceleration and speed are basically consistent, and to avoid impact or slippage failure. Based on the above, the tooling also has the following settings.

[0037] First, the inner cavities of the cylinders 61 on both sides of the piston assembly 65 are filled with hydraulic oil. The guide rod 62 is rotatably connected to the cylinder 61. The piston assembly 65 includes a piston 1 651 and a piston 2 652 that are rotatably connected together on the same axis. The piston 1 651 forms a slidable connection with the guide rod 62 through a keyway. The piston 2 652 is magnetically connected to the magnet 64 and abuts against the spring 66. Piston 651 has multiple adjusting holes evenly distributed along its circumference, with the diameters of the adjusting holes decreasing sequentially. Piston 652 has a guide hole with a diameter larger than that of the adjusting holes. The multiple adjusting holes are connected to the guide hole sequentially by the rotation of piston 651.

[0038] Hydraulic oil flows on both sides of piston assembly 65 as piston assembly 65 moves axially. During the rebound of spring 66, hydraulic oil away from spring 66 enters the space where spring 66 is located through adjustment hole and guide hole, and provides resistance to the rebound of spring 66.

[0039] Since the larger the diameter of the adjusting hole connected to the guide hole, the higher the fluidity of the hydraulic oil, the resistance to prevent the spring 66 from rebounding increases as the diameter of the adjusting hole decreases, thus achieving the adjustment of the spring 66's rebound speed.

[0040] Secondly, an adjusting member 11 is provided between a mounting shaft 41, a transmission block 5 and a guide rod 62. The adjusting member 11 has an output end that can rotate with the mounting shaft 41 so that the guide rod 62 rotates according to the rotation of the mounting shaft 41, thereby achieving the return force of the spring 66 matched according to the size of the automotive-grade power component.

[0041] Adjusting component 11 includes drive shaft 111, drive shaft 2 112, drive shaft 3 113, drive gear 1 114, and drive gear 2 115; Among them, drive shaft 111 is rotatably mounted on the lower end of the mounting platform 3 and is connected to the mounting shaft 41 through a cylindrical gear set; drive shaft 212 is vertically arranged; the upper end of drive shaft 212 is connected to drive shaft 111 through a bevel gear set; the lower end of drive shaft 212 passes through and rotatably connects to the support box 2 and the slide table 1; the lower end of drive shaft 212 is fixedly connected to the worm gear; and drive shaft 313 is rotatably mounted on the transmission block 5 and is connected to the worm gear through a worm wheel. Transmission gear 114 is fixed on transmission shaft 313, and transmission gear 215 is fixed on one end of guide rod 62. Transmission gear 215 is matched with transmission gear 114.

[0042] When the slide table 1 slides completely out of the test cabinet, the transmission gear 114 meshes with the transmission gear 115. At this time, automotive-grade power components can be loaded and unloaded at the placement station. The manual wheel 44 can also be operated to rotate the mounting shaft 41 and the guide rod 62, thereby changing the position of the fixture 42 and the adjustment hole.

[0043] Furthermore, an adjusting member 2 12 is provided at the end of the spring-loaded part 6 away from the transmission gear 2 115. The adjusting member 2 12 is used to position the guide rod 62 after rotation, and to connect the adjusting hole with the guide hole after power is cut off, so that the spring 66 pushes the slide table 1 to spring back with the maximum spring force.

[0044] Adjustment component 2 12 includes a box body 121, a fixing frame 122, a coil spring 123, a ratchet 124, an electromagnet 2 125, and a limiting plate 126; Among them, the box body 121 is fixed to the other end of the guide rod 62, and the ratchet 124 is fixedly sleeved on the outer circumference of the box body 121. The coil spring 123 is coaxially arranged inside the box body 121. The outer ring of the coil spring 123 is fixedly connected to the inner wall of the box body 121, and the inner ring of the coil spring 123 is fixedly connected to the fixing frame 122. The fixing frame 122 is fixedly connected to the test cabinet. The electromagnet 125 has a horizontally extendable movable end. The movable end of the electromagnet 10 is fixedly connected to the limiting plate 126. The limiting plate 126 cooperates with the ratchet 124.

[0045] When energized, the moving end of electromagnet 2 125 retracts, engaging the limiting plate 126 with the ratchet 124. When de-energized, the moving end of electromagnet 2 125 extends, completely disengaging the limiting plate 126 from the ratchet 124.

[0046] The guide rod 62 rotates, causing the box 121 to rotate, which in turn causes the ratchet 124 to rotate, further compressing the coil spring 123.

[0047] Since the moving end of electromagnet 2 125 moves by generating a magnetic field, it can extend slightly under the action of external force even when the moving end is in the retracted state. Therefore, ratchet 124 can be driven to rotate by guide rod 62.

[0048] It should be noted that the coil spring 123 is in a pre-compressed state, and a limit post 127 is fixed on the fixing bracket 122. The limit post 127 is used to prevent the coil spring 123 from changing from the pre-compressed state to the naturally relaxed state. By pre-compressing the coil spring 123, it is possible for the coil spring 123 to completely connect the adjustment hole with the guide hole when the electromagnet 125 is de-energized.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A car grade power component test fixture for reactive load, comprising a test cabinet, a sliding table (1) and a mounting table (3), characterized in that: The sliding table (1) is installed in the test cabinet through a horizontal sliding pair and can partially extend out of the test cabinet along the length direction of the test cabinet. The upper end of the sliding table (1) is fixed with a top-open support box (2). An installation table (3) is fixedly embedded in the opening of the support box (2). A pair of installation shafts (41) are rotatably installed on the installation table (3). The area between the two installation shafts (41) is a placement station for vehicle gauge level power components. At least two clamps (42) are uniformly and circumferentially spaced apart on the installation shaft (41). The at least two clamps (42) on the same clamping component (4) are used for clamping vehicle gauge level power components of different sizes. Further comprising a transmission block (5) and a cylinder (61). The transmission block (5) is fixed at the lower end of the sliding table (1). The cylinder (61) extends along the sliding direction of the sliding table (1). A magnet (64) is slidably installed on the outside of the cylinder (61) through a sliding sleeve (63). A piston one (651) and a piston two (652) are arranged in the cylinder (61). A spring (66) is arranged in the cylinder (61). The piston one (651) is rotatably connected with the piston two (652). The piston one (651) can rotate relative to the piston two (652). The piston two (652) is magnetically connected with the magnet (64) and abuts against the spring (66). One end of the transmission block (5) towards the test cabinet body can abut against the sliding sleeve (63). Further comprising a linear motor module, an electromagnet one (10), a spring column (9) and a mounting plate (8). The linear motor module is vertically installed in the test cabinet. The electromagnet one (10) is fixed at the moving end of the linear motor module. The electromagnet one (10) has a moving end that can vertically stretch and retract. The moving end of the electromagnet one (10) is installed with the spring column (9) through the mounting plate (8). The moving end of the spring column (9) is plug-in embedded in the transmission block (5), keeping the spring (66) in a compressed state.

2. A test fixture for power components of a reactive load for automotive applications according to claim 1, characterized in that: The cylinder (61) is closed at both ends. The cylinder (61) is filled with hydraulic oil. A plurality of adjusting holes are uniformly and circumferentially arranged on the piston one (651). The diameters of the plurality of adjusting holes are sequentially reduced. A guide hole is arranged on the piston two (652). The diameter of the guide hole is larger than that of the adjusting hole. The plurality of adjusting holes are sequentially communicated with the guide hole through the rotation of the piston one (651).

3. A test fixture for power components of a reactive load for automotive applications according to claim 1, characterized in that: Further comprising a guide rod (62). The guide rod (62) is arranged in the cylinder (61) and penetrates through the piston one (651), the piston two (652) and the spring (66). The piston one (651) is slidably connected with the guide rod (62) through a key groove. The guide rod (62) is exposed at both ends of the cylinder (61). The guide rod (62) can rotate according to the rotation of the installation shaft (41).

4. A reactive load automotive grade power component test fixture according to claim 3, characterized in that: Further comprising a box body (121) and an electromagnet two (125). The box body (121) is fixedly connected with the guide rod (62). A ratchet wheel (124) is fixedly sleeved on the outer circumferential surface of the box body (121). A coil spring (123) is coaxially arranged in the box body (121). The outer ring of the coil spring (123) is fixedly connected with the inner wall of the box body (121). The inner ring of the coil spring (123) is fixedly connected with a fixing frame (122). The fixing frame (122) is fixedly connected with the test cabinet. The electromagnet two (125) has a moving end capable of horizontal extension and retraction, the moving end of the electromagnet one (10) is fixedly connected with a limiting plate (126), and the limiting plate (126) cooperates with the ratchet (124).

5. A reactive load automotive grade power component test fixture according to claim 4, characterized in that: The coil spring (123) is in a pre-compressed state.

6. A reactive load automotive grade power component test fixture according to claim 5, characterized in that: When the coil spring (123) is in the pre-compressed state, the largest-diameter adjusting hole is in complete communication with the guide hole.

7. A reactive load automotive grade power component test fixture according to claim 6, characterized in that: The limiting column (127) is fixed on the fixed frame (122) and is used for preventing the coil spring (123) from changing from the pre-compressed state to a natural relaxation state.

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