Device and method for detecting electrical performance of low-voltage control cabinet terminal

Abstract

The invention relates to the technical field of terminal performance detection, in particular to a low-voltage control cabinet terminal electrical performance detection device and method.The low-voltage control cabinet terminal electrical performance detection device comprises a bottom cylinder, a rotating disc is rotationally arranged at the bottom in the bottom cylinder, a plurality of bases distributed in the circumferential direction are embedded in the rotating disc, each base is provided with a containing groove, and each base is provided with a clamping assembly used for clamping a terminal; the detector is positioned in the bottom cylinder and is used for detecting the terminal; the bottom of the conductive core column is supported by the flexible interlayer (such as silica gel and rubber) at the upper end of the lifting block, the top of the conductive core column is pressed by the flexible pressing plate (the same as the flexible material), and although the annular connecting part is clamped by the lifting ring and the lower pressing ring which are made of metal, the contact surface only acts on the non-plating edge (or a preset clamping area) of the annular connecting part, so that the non-plating edge of the annular connecting part can be clamped. And when the flexible interlayer and the flexible pressing plate are in direct contact with the surface of the plating layer of the conductive core column, rigid friction can be avoided through elastic deformation of a material, and scraping damage to a tin plating layer and a silver plating layer in the clamping process is reduced.

Description

Technical Field

[0001] This application relates to the field of terminal performance testing technology, and in particular to a device and method for testing the electrical performance of terminals in a low-voltage control cabinet. Background Technology

[0002] Low-voltage control cabinet terminals are the core components for realizing electrical connections in low-voltage control cabinets. Their main functions are to simplify the wire connection process, ensure the stability and reliability of electrical connections, and fundamentally reduce safety risks such as short circuits and overheating caused by poor contact. At the same time, they can also connect to voltage and current signal measurement and monitoring modules, as well as smart instruments and communication interfaces, providing basic connection support for remote equipment monitoring and data transmission.

[0003] Electrical performance testing of low-voltage control cabinet terminals is a crucial step in ensuring their safe and stable operation. For example, a low-voltage distribution cabinet terminal testing device (application number CN202310501904.1) relates to the field of terminal testing technology. This existing technology includes a test bench, a port adjustment component, and a fixing mechanism. The fixing mechanism, in conjunction with the port adjustment component, simultaneously limits and fixes the terminal and wire, preventing the terminal from detaching from the wire during testing and splashing everywhere, potentially jamming into other structures and affecting their operation, or falling on workers. It also avoids the problem of difficulty in quickly collecting splashed terminal parts, improving the testing efficiency. Simultaneously, a wire clamp is used to hold the wire, and a rubber arc-shaped clamp facilitates the wire entering the clamp. After the wire enters the clamp, the rubber arc-shaped clamp further limits its movement, preventing the wire from detaching. However, the aforementioned existing technologies still have some shortcomings when testing the electrical performance of terminals: The aforementioned prior art involves fitting the terminal's connector onto the retaining post at the center of the positioning disc, causing the terminal body to fit against the positioning disc, and aligning the terminal's connector sleeve with the downward opening of the open ring. The pressure rod then drives the other end of the hinged retaining plate to flip towards the terminal. Multiple retaining plates, evenly distributed around the circumference of the open ring, simultaneously approach the terminal until they are tightly pressed against the end of the terminal from the circumference and a clamping force is applied. The retaining plates are made of rigid metal and are in direct contact with the terminal surface. During the clamping process, the conductive plating layer (such as tin plating or silver plating) of the terminal is easily scratched, damaging the terminal's conductivity.

[0004] Meanwhile, the rubber arc clamp is only designed for limiting the wires and has no protective structure for the terminal insulation components. When clamped, it may squeeze the terminal insulation shell, causing damage to the insulation layer. This can easily lead to misjudgments such as leakage and breakdown in subsequent electrical tests (such as insulation resistance and withstand voltage tests).

[0005] Based on this, as stated above, there is still room for improvement in the existing methods for testing the electrical performance of terminals. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a device and method for testing the electrical performance of low-voltage control cabinet terminals, employing the following technical solution: In a first aspect, a low-voltage control cabinet terminal electrical performance testing device includes a base cylinder, a turntable rotatably disposed at the bottom of the base cylinder, a plurality of circumferentially distributed bases embedded in the turntable, a receiving groove being formed on the base, the receiving groove corresponding to the terminal, an annular end corresponding to the annular connecting part being constructed thereon, and a guide groove section corresponding to the conductive core post being constructed thereon, and the base being provided with: Clamping assembly for holding terminals; A detector located inside the bottom cylinder for detecting terminals; The clamping assembly includes sliding rods that are symmetrically arranged at the annular end and slide through. Lifting rings are symmetrically arranged at the upper ends of the two sliding rods, and lifting springs are arranged at the bottom of the sliding rods. Lifting blocks are slidably arranged in the guide groove section, and flexible partitions are arranged at the upper ends of the lifting blocks. Lifting springs are arranged at the bottom of the lifting blocks.

[0007] Preferably, the clamping assembly further includes a rotating shaft rotatably passing through the turntable, the rotating shaft being provided with a threaded section, and a top plate being provided on the rotating shaft to mate with the threaded section; The base has an arc-shaped groove, and a through hole is provided on one side of the arc-shaped groove. A limit rod is provided at the lower end of the top plate, and the limit rod is located in the arc-shaped groove.

[0008] Preferably, the top plate is provided with a top plate that corresponds to the base one by one around the top plate, and a downward sliding rod is provided through the top plate. The lower end of the downward sliding rod is provided with a downward ring located directly above the lifting ring.

[0009] Preferably, a sliding rod is slidably provided on the top plate, and a flexible pressure plate located directly above the lifting block is provided at the lower end of the sliding rod. A downward pressure spring is provided between the flexible pressure plate and the top plate. A top cone is provided at the center of the annular end by a spring, and the top cone has a conical surface at its upper end.

[0010] Preferably, the lifting ring is provided with an electrical contact, and the flexible pressure plate is provided with a conductive contact.

[0011] Preferably, a rotating ring is connected to the upper end of the rotating shaft by a ball bearing, and a guide rod is provided on the rotating ring, with the lower end of the guide rod sliding through the turntable.

[0012] Preferably, the detector includes an energized ring disposed inside the bottom cylinder, the energized ring being composed of multiple arc-shaped energized segments, with an insulating segment disposed between two adjacent arc-shaped energized segments; One end of the base is equipped with a current-carrying block that contacts the current-carrying ring.

[0013] Preferably, a cover plate is provided at the upper end of the bottom cylinder, and the cover plate has windows that correspond one-to-one with the base. A conductive ring is provided at the bottom of the cover plate. The conductive ring is composed of multiple arc-shaped conductive segments, and an insulating block is provided between two adjacent arc-shaped conductive segments.

[0014] Preferably, a connecting rod corresponding to the base is slidably passed through the turntable, and a conductive block is provided at the upper end of the connecting rod to rotate and contact the conductive ring.

[0015] Secondly, a method for testing the electrical performance of terminals in a low-voltage control cabinet, the method of which includes the following steps: Step 1: Terminal preparation. Place the terminal to be tested into the base receiving slot, embed the conductive core of the terminal into the guide slot section, and support the bottom of the conductive core with the lifting block.

[0016] Step 2: Terminal clamping, the rotating shaft drives the top plate to rotate synchronously through the rotating ring and guide rod connected by the ball bearing, the lower pressure ring initially presses the annular connection part, and the flexible pressure plate presses the conductive core column.

[0017] Step 3: Press down synchronously, the top plate continues to move down, and by continuously increasing the clamping force, the annular connecting part squeezes the top cone, and the radial component force of the conical surface eliminates the terminal offset, thereby realizing the axial clamping and radial positioning of the terminal.

[0018] Step 4: Performance testing. The energized contact is attached to the lower end of the annular connection, the conductive contact on the flexible pressure plate is attached to the top of the conductive core, the energized block slides in contact with the energized ring inside the bottom cylinder, and a testing circuit is formed through the wire.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. The bottom of the conductive core column of the present invention is supported by a flexible partition (such as silicone or rubber) at the upper end of the lifting block, and the top is pressed by a flexible pressure plate (of the same flexible material). Although the annular connection part is clamped by a lifting ring and a pressing ring of metal material, the contact surface only acts on the non-plated edge of the annular connection part (or the preset clamping area). When the flexible partition and the flexible pressure plate directly contact the plating surface of the conductive core column, rigid friction can be avoided through the elastic deformation of the material, reducing the scratch damage to the tin and silver plating layers during clamping and ensuring the integrity of the conductive plating layer of the terminal.

[0020] 2. The clamping assembly of this invention incorporates multiple sets of buffer springs. During clamping, the springs apply force gradually through elastic deformation. When the top plate moves downward, the pressing spring and the downward spring compress slightly, gradually increasing the clamping force through elastic force, rather than applying direct rigid pressure. The top cone spring compresses synchronously when the annular connecting part is pressed down, balancing the axial pressure and preventing excessive local pressure from causing the plating to crush or peel off. This buffering mechanism controls the clamping force within the tolerance range of the terminal plating, preventing damage to the plating structure due to overload, thereby ensuring the conductivity continuity of the terminal.

[0021] 3. In this invention, the conical surface of the central cone at the annular end is inserted into the circular hole of the annular connecting part during terminal loading, achieving centering. During clamping, the radial component force generated by the compression of the cone spring further eliminates lateral offset of the terminal. Combined with the symmetrical clamping of the lifting ring and the lowering ring, this ensures that the terminal does not slide laterally during clamping. Simultaneously, the top plate is precisely aligned with the base along the arc-shaped groove via a limiting rod, preventing additional friction between the clamping components and the terminal plating due to positional deviation when the top plate moves downward. This precise positioning and limiting design reduces relative sliding between the terminal and the clamping structure during clamping, preventing plating wear from the movement trajectory and indirectly ensuring stable terminal conductivity. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the terminal of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the present invention.

[0024] Figure 3 This is a cross-sectional view between the clamping component and the detector of the present invention.

[0025] Figure 4 This is a schematic diagram of the clamping component of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the base of the present invention.

[0027] Figure 6 This is a cross-sectional view of the base of the present invention.

[0028] Figure 7 This is a schematic diagram of the structure between the turntable, clamping assembly and detector of the present invention.

[0029] Figure 8 This is the present invention. Figure 7 Enlarged view of a portion of point A in the middle.

[0030] Figure 9 This is a cross-sectional view of the turntable, clamping assembly and detector of the present invention.

[0031] Figure 10 This is the present invention. Figure 9 Enlarged view of section B in the middle.

[0032] Figure 11 This is a schematic diagram of the detector structure of the present invention.

[0033] Figure 12 This is the present invention. Figure 11 Enlarged view of a section at point C.

[0034] Explanation of reference numerals in the attached drawings: 1. Terminal; 11. Annular connection; 12. Conductive core; 13. Circular hole; 2. Bottom cylinder; 21. Turntable; 22. Base; 23. Receiving groove; 231. Annular end; 232. Guide groove section; 3. Clamping assembly; 31. Sliding rod; 32. Lifting ring; 321. Lifting spring; 33. Lifting block; 331. Flexible partition; 332. Lifting spring; 34. Rotating shaft; 341. Threaded section; 35. Top plate; 36. Arc groove; 37. Through hole; 38. Limiting rod; 39. Top cone; 3 91. Conical surface; 4. Top plate; 411. Downward sliding rod; 42. Downward ring; 421. Pressing spring; 43. Sliding rod; 44. Flexible pressure plate; 45. Downward spring; 46. Electrical contact; 47. Conductive contact; 48. Rotating ring; 49. Guide rod; 5. Detector; 51. Electrical ring; 511. Arc-shaped electrical section; 512. Insulating section; 52. Electrical block; 53. Cover plate; 54. Window; 55. Conductive ring; 551. Arc-shaped conductive section; 552. Insulating block; 56. Connecting rod; 57. Conductive block. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1 to 12 This application will be described in further detail.

[0036] This application discloses a device and method for testing the electrical performance of terminals in a low-voltage control cabinet. The device achieves batch feeding of terminals through a rotating turntable inside the bottom cylinder and multiple sets of bases. The device uses a clamping assembly containing flexible contacts and buffer springs to achieve precise positioning and non-destructive clamping of the terminals. The device then constructs a testing circuit through conductive contacts and segmented conductive rings to achieve automated testing of terminal contact resistance and insulation performance. After testing, the device can automatically reset to prepare for the next test.

[0037] Reference Figure 1 As shown, terminal 1 consists of an annular connecting part 11 and a conductive core 12. The annular connecting part 11 has a circular hole 13 in the middle, which is used to fix terminal 1 to other components by fasteners such as bolts. The conductive core 12 is hollow, which makes it easy to insert wires (such as the end of a wire with the insulation stripped) into it and achieve close contact with the wires by squeezing or other means to ensure conductivity.

[0038] Reference Figure 2 , Figure 3 and Figure 4 As shown, an electrical performance testing device for a low-voltage control cabinet terminal 1 includes a base cylinder 2. A turntable 21 is rotatably mounted on the bottom of the base cylinder 2 via a deep groove ball bearing. Multiple circumferentially distributed bases 22 are embedded in the turntable 21. The bases 22 and the turntable 21 are detachably fixed by interference fit or bolts. A receiving groove 23 is provided on the base 22, which corresponds to the terminal 1. The receiving groove 23 is constructed with an annular end 231 corresponding to the annular connecting part 11 and a guide groove section 232 corresponding to the conductive core post 12.

[0039] The feeding machine places the terminal 1 to be tested into the receiving groove 23 of the base 22 on the turntable 21, ensuring that the annular connecting part 11 of the terminal 1 is aligned with the annular end 231 of the base 22 and the conductive core 12 is embedded in the guide groove section 232. The base 22 is provided with a clamping component 3 for clamping the terminal 1. The clamping component 3 will clamp the terminal 1. The clamping component 3 is made of insulating material and fits tightly with the terminal 1 to prevent the terminal 1 from loosening or conducting interference during the test.

[0040] The base 22 is equipped with a detector 5 located inside the bottom cylinder 2, which is used to detect the electrical performance of the terminal 1. During the test, the built-in conductivity test module of the detector 5 is started synchronously. It establishes a connection with the conductive core 12 of the terminal 1 through the probe, and applies a stable DC current. At the same time, it collects the voltage drop across the two ends of the terminal 1 in real time, and then automatically calculates the contact resistance value according to the resistance formula to evaluate the conductivity continuity of the terminal 1.

[0041] Specifically, the clamping assembly 3 includes sliding rods 31 symmetrically arranged and slidably inserted through the annular end 231. The sliding rods 31 are slidably inserted and engaged with the annular end 231 through guide holes. The sliding rods 31 can slide vertically along the guide holes. The upper ends of the two sliding rods 31 are fixed with lifting rings 32 by bolts, and lifting springs 321 are provided at the bottom of the sliding rods 31.

[0042] A lifting block 33 is slidably inserted into the guide channel section 232. A sliding cavity adapted to the lifting block 33 is opened in the guide channel section 232. The lifting block 33 is slidably inserted into the guide channel section 232 through the sliding cavity. A flexible partition 331 is bonded to the upper end of the lifting block 33, and a lifting spring 332 is provided at the bottom of the lifting block 33.

[0043] During testing, terminal 1 is placed between the flexible partition 331 and the lifting ring 32. The conductive core 12 of terminal 1 is embedded in the guide groove 232, and its bottom contacts the flexible partition 331 at the upper end of the lifting block 33. The annular connecting part 11 is mounted between the lifting rings 32 at the upper ends of the two sliding rods 31. At this time, the lifting spring 332 at the bottom of the lifting block 33 is in a naturally extended state, pushing the lifting block 33 upward, so that the flexible partition 331 fits against the bottom of terminal 1 to provide support. At the same time, the lifting spring 321 at the bottom of the sliding rod 31 also remains extended, supporting the annular connecting part 11 of terminal 1 upward through the lifting ring 32.

[0044] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the clamping assembly 3 also includes a rotating shaft 34 rotatably passing through the turntable 21. The rotating shaft 34 is provided with a threaded section 341, and a top plate 35 that mates with the threaded section 341 is provided on the rotating shaft 34. The inner hole of the top plate 35 is machined with an internal thread, and the transmission connection between the top plate 35 and the rotating shaft 34 is realized through the meshing of the internal and external threads. An arc-shaped groove 36 is provided on the base 22, and a through hole 37 is provided on one side of the arc-shaped groove 36. A limiting rod 38 is fixedly installed at the lower end of the top plate 35 by bolts. The limiting rod 38 is located in the arc-shaped groove 36. A top plate 4 corresponding to the base 22 is provided around the top plate 35.

[0045] After the terminal 1 is placed between the flexible partition 331 and the lifting ring 32, the rotating shaft 34 is driven to rotate by an external drive. Since the upper end of the rotating shaft 34 is connected to the rotating ring 48 by a ball, and the rotating ring 48 is provided with a guide rod 49, the rotating shaft 34 will drive the guide rod 49 to rotate together through the rotating ring 48. The lower end of the guide rod 49 slides through the turntable 21. The guide rod 49 slides through the guide groove and slides through the sliding hole. The guide rod 49 forces the top plate 35 to rotate together with the rotating shaft 34. The top plate 35 drives the limiting rod 38 to move in the arc groove 36 until the limiting rod 38 rotates to the top of the through hole 37, at which point the top plate 4 is located directly above the base 22.

[0046] The limiting rod 38 is restricted by the through hole 37 on one side of the arc groove 36. At this time, the rotating shaft 34 continues to rotate. Its threaded section 341 and the threaded engagement with the top plate 35 force the top plate 35 to move downward. The top plate 35 drives the top plate 4 to move down synchronously and approach the base 22.

[0047] It should be noted that the ball bearing engagement between the rotating ring 48 and the rotating shaft 34 is set to only drive the top plate 35 to complete the rotation within the length range of the arc groove 36. When the limiting rod 38 moves within the arc groove 36, the friction provided by the ball bearing engagement is sufficient to drive the rotating ring 48, the guide rod 49, and the top plate 35 to rotate synchronously, ensuring that the top plate 35 rotates precisely to the top of the base 22. When the limiting rod 38 reaches the end of the arc groove 36 and is blocked, the required rotational resistance instantly exceeds the ball bearing engagement threshold, the ball slips in the engagement groove, and the rotating ring 48 and the guide rod 49 stop rotating. At this time, the rotating shaft 34 can continue to rotate by its own rotational inertia and the rolling buffer of the ball, and push the top plate 35 to move down independently through the threaded transmission.

[0048] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, a downward sliding rod 411 is provided through the top plate 4. A downward pressing ring 42 is welded and fixed to the lower end of the downward sliding rod 411. The downward pressing ring 42 is located directly above the lifting ring 32. A clamping spring 421 is provided between the downward pressing ring 42 and the top plate 4. When the top plate 4 moves downward, it will simultaneously drive the downward sliding rod 411 and the downward pressing ring 42 to move downward. When the downward pressing ring 42 contacts the upper end of the annular connecting part 11 of the terminal 1, it will press against it. At this time, the lifting ring 32, under the action of the lifting spring 321, supports the annular connecting part 11 upward, and cooperates with the downward pressing ring 42 to clamp the terminal 1. As the top plate 4 continues to move downward, the downward sliding rod 411 slides upward relative to the top plate 4, and the clamping spring 421 between the downward pressing ring 42 and the top plate 4 is compressed. The elastic force generated by the spring continues to act on the annular connecting part 11 through the downward pressing ring 42, so that the clamping force gradually increases.

[0049] During this process, the elastic deformation of the clamping spring 421 can buffer the impact force of the top plate 4 moving downward, avoid damage to the terminal 1 caused by rigid clamping, and at the same time ensure that the annular connection part 11 is always subjected to a stable and adjustable clamping force, thus ensuring that the terminal 1 is fixed in position during testing.

[0050] A sliding rod 43 is slidably inserted on the top plate 4. A flexible pressure plate 44 is provided at the lower end of the sliding rod 43. The flexible pressure plate 44 is located directly above the lifting block 33. A downward pressure spring 45 is provided between the flexible pressure plate 44 and the top plate 4.

[0051] The downward movement of the top plate 4 causes the sliding rod 43 and the flexible pressure plate 44 to move downward synchronously. When the flexible pressure plate 44 contacts the top of the conductive core 12 of the terminal 1, it first applies a gentle pressure. At this time, the lifting block 33 pushes the bottom of the conductive core 12 upward under the action of the lifting spring 332, cooperating with the flexible pressure plate 44 to limit the conductive core 12. As the top plate 4 continues to move downward, the sliding rod 43 slides upward relative to the top plate 4, and the downward pressure spring 45 between the flexible pressure plate 44 and the top plate 4 is compressed. The elastic force of the spring continues to act on the conductive core 12 through the flexible pressure plate 44, causing the pressing force to gradually increase.

[0052] The flexible material (such as silicone or rubber) of the flexible pressure plate 44 can prevent scratches or indentations on the surface of the conductive core 12, protecting the integrity of its conductive coating; while the buffering effect of the downward pressure spring 45 can offset the rigid impact of the downward movement of the top plate 4, ensuring that the pressure on the conductive core 12 is uniform and controllable. This dual protection mechanism not only prevents the conductive core 12 from shifting during testing through stable clamping force, ensuring accurate contact between the detection probe and the core, but also avoids mechanical stress from damaging the conductivity of the terminal 1.

[0053] A top cone 39 is spring-pressed at the center of the annular end 231. The top cone 39 has a tapered surface 391 at its upper end. When the annular connecting part 11 of terminal 1 is mounted on the lifting ring 32, the central hole 13 will naturally fit into the tapered surface 391 of the top cone 39, achieving centering through the guiding effect of the tapered surface. When the pressing ring 42 moves down with the top plate 4 and presses the upper end of the annular connecting part 11, the annular connecting part 11 will press the top cone 39 downward, and the spring at the bottom of the top cone 39 will be compressed accordingly. The tapered surface 391 will always be in close contact with the inner wall of the hole 13. At this time, the radial component of the tapered surface will further eliminate any possible lateral displacement of terminal 1, ensuring that the annular connecting part 11 and the annular end 231 are completely coaxial.

[0054] At the same time, the reverse elastic force generated by the compression of the spring acts on the annular connecting part 11 through the top cone 39, forming an axial balance with the downward pressure of the lower pressure ring 42, so that the annular connecting part 11 is firmly clamped in the vertical direction, avoiding the terminal 1 from tilting due to uneven force during the detection process, and providing a precise position reference for the stable contact between the conductive core 12 and the detection probe.

[0055] The lifting ring 32 is provided with an energized contact 46. Figure 6 As shown in the image), the flexible pressure plate 44 is provided with conductive contacts 47. Figure 8 As shown in the diagram, when terminal 1 is clamped and fixed, the energized contact 46 of the lifting ring 32 will make close contact with the lower end face of the annular connection part 11 of terminal 1, and the conductive contact 47 of the flexible pressure plate 44 will form a reliable conductive connection with the top of the conductive core 12. The two sets of contacts correspond to the two conductive parts of terminal 1 respectively, and are connected to the test circuit of detector 5 through wires.

[0056] During testing, current flows from the conductive contact 47 of the flexible pressure plate 44 into the conductive core 12, is conducted through the inside of the terminal 1 to the annular connection 11, and then flows out from the energized contact 46 of the lifting ring 32, forming a complete conductive circuit. At the same time, the detector 5 collects the voltage drop across the two ends of the terminal 1 through these two sets of contacts and calculates the contact resistance by combining the current value.

[0057] After the test is completed, the rotating shaft 34 reverses. At this time, since the limiting rod 38 is located in the through hole 37, it loses the rotation restriction of the side wall of the arc groove 36. The threaded section 341 will first engage with the top plate 35 in the opposite direction, causing the top plate 35 to move upward. As the top plate 35 moves upward, the top plate 4 simultaneously disengages from the terminal 1. The originally compressed clamping spring 421 and the downward pressure spring 45 gradually rebound, pushing the downward pressure ring 42 and the flexible pressure plate 44 to reset upward, releasing the clamping force on the annular connection part 11 and the conductive core 12 of the terminal 1.

[0058] Simultaneously, as the top plate 35 moves upward, the guide rod 49 moves upward synchronously with the rotating ring 48, and the ball joint between the rotating shaft 34 and the rotating ring 48 resumes transmission. When the top plate 35 rises back to its initial height, the rotating shaft 34 continues to reverse, which will drive the top plate 35 to rotate synchronously through the rotating ring 48 and the guide rod 49. The limiting rod 38 at the lower end of the top plate 35 then rotates out from the through hole 37 and returns to its initial position along the arc groove 36, preparing for the next step of clamping and testing the terminal 1.

[0059] Reference Figure 11 and Figure 12 As shown, the detector 5 includes an energized ring 51 disposed inside the bottom cylinder 2. The energized ring 51 is composed of multiple arc-shaped energized segments 511, and an insulating segment 512 is disposed between two adjacent arc-shaped energized segments 511.

[0060] One end of the base 22 is provided with a energizing block 52 that contacts the energizing ring 51. The energizing block 52 is connected to the energizing contact 46 by a wire. During testing, the turntable 21 is driven to rotate. When the turntable 21 rotates, it will drive the rotating shaft 34 and the top plate 35 to rotate together. The energizing block 52 always maintains sliding contact with the energizing ring 51. As the base 22 enters different testing positions, the energizing block 52 will be connected to different arc-shaped energizing sections 511 to realize the switching of the testing circuit (such as connecting to test circuits of different current levels).

[0061] The setting of the insulation section 512 ensures that there is no current interference between each arc-shaped energized section 511, so that each test is carried out through a single preset circuit, avoiding the impact of multiple circuits on the test accuracy. This structure not only realizes the continuous connection of the conductive path during the rotation of the turntable 21, but also meets the circuit switching requirements of multi-parameter testing of terminal 1 (such as contact resistance testing under different currents) through the partition design of the arc-shaped energized section 511, providing a stable electrical connection foundation for automated testing.

[0062] The bottom cylinder 2 is provided with a cover plate 53 at the upper end. The cover plate 53 has windows 54 that correspond one-to-one with the base 22. The bottom of the cover plate 53 is provided with a conductive ring 55. The conductive ring 55 is composed of multiple arc-shaped conductive segments 551. An insulating block 552 is provided between two adjacent arc-shaped conductive segments 551.

[0063] A connecting rod 56 corresponding to the base 22 is slidably passed through the turntable 21. A conductive block 57 is provided at the upper end of the connecting rod 56 to rotate and contact the conductive ring 55. The conductive block 57 is connected to the conductive contact 47 through a wire.

[0064] When the turntable 21 rotates, it drives the rotating shaft 34 and the top plate 35 to rotate together. The top plate 35 drives the conductive block 57 through the connecting rod 56. When the turntable 21 drives the base 22 to rotate, the conductive block 57 moves synchronously with the connecting rod 56 and always slides against the surface of the conductive ring 55 to ensure that the electrical connection is not interrupted. At the same time, the conductive block 57 is connected to the conductive contact 47 on the flexible pressure plate 44 through the wire. When the conductive block 57 slides to different arc-shaped conductive segments 551, it can be connected to the corresponding detection circuit: for example, when connected to the current input circuit, the test current is transmitted to the conductive contact 47 through the arc-shaped conductive segment 551, the conductive block 57, and the wire, and then flows into the conductive core 12 of the terminal 1; when connected to the voltage acquisition circuit, the voltage signal at both ends of the terminal 1 can be transmitted in reverse through the conductive contact 47, the wire, and the conductive block 57 to the corresponding arc-shaped conductive segment 551, and finally transmitted to the detector 5, realizing the stable transmission of the detection signal and the switching of the circuit.

[0065] Finally, the present invention also provides a method for testing the electrical performance of terminal 1 of a low-voltage control cabinet, the method of which includes the following steps: Step 1: Terminal 1 preparation. Place the terminal 1 to be tested into the receiving groove 23 of the base 22, ensuring that the conductive core 12 of the terminal 1 is embedded in the guide groove section 232 and the annular connecting part 11 is aligned with the annular end 231 of the base 22. The flexible partition 331 of the lifting block 33 in the guide groove section 232 (with a lifting spring 332 at the bottom) supports the bottom of the conductive core 12 upward. The lifting ring 32 (with a lifting spring 321 at the bottom) at the upper end of the sliding rod 31 on both sides of the annular end 231 of the base 22 supports the annular connecting part 11 upward. At the same time, the conical surface 391 of the central top cone 39 of the annular end 231 is inserted into the round hole 13 of the annular connecting part 11 to achieve the centering and support of the terminal 1.

[0066] Step 2: Terminal 1 is clamped. The rotating shaft 34 drives the top plate 35 to rotate synchronously through the rotating ring 48 and guide rod 49 connected by the ball bearing. The lower limit rod 38 of the top plate 35 moves along the arc groove 36 until the limit rod 38 rotates to the top of the through hole 37. The top plate 35 and the top plate 4 are precisely aligned with the base 22. After the limit rod 38 is blocked by the through hole 37 of the arc groove 36, the rotating shaft 34 continues to rotate. The threaded section 341 pushes the top plate 35 and the top plate 4 to move down. The top plate 4 drives the lower pressure slide rod 411, the lower pressure ring 42, the sliding rod 43, and the flexible pressure plate 44 to move down synchronously. The lower pressure ring 42 presses the annular connecting part 11, and the flexible pressure plate 44 presses the conductive core column 12.

[0067] Step 3: Simultaneous downward pressure, the top plate 4 continues to move downward, the pressing spring 421 (between the pressing ring 42 and the top plate 4) and the pressing spring 45 (between the flexible pressure plate 44 and the top plate 4) are compressed, and the clamping force is continuously increased through elastic force; at the same time, the annular connecting part 11 squeezes the top cone 39, the top cone 39 spring is compressed, and the radial component force of the conical surface 391 eliminates the offset of the terminal 1, realizing the axial clamping and radial positioning of the terminal 1.

[0068] Step 4: Performance testing. The energized contact 46 on the lifting ring 32 is attached to the lower end of the annular connecting part 11, and the conductive contact 47 on the flexible pressure plate 44 is attached to the top of the conductive core column 12. The energized block 52 at one end of the base 22 slides in contact with the energized ring 51 (multi-arc energized section 511 and insulating section 512) inside the bottom cylinder 2. The conductive block 57 of the connecting rod 56 on the turntable 21 slides in contact with the conductive ring 55 (multi-arc conductive section 551 and insulating block 552) at the bottom of the cover plate 53. A testing circuit is formed through the wires.

[0069] Step 5: The device is reset. After the test is completed, the rotating shaft 34 reverses, and the limiting rod 38 has no rotation restriction in the through hole 37. The threaded section 341 drives the top plate 35 and the top plate 4 to move upward. The pressing spring 421 and the lower pressure spring 45 rebound, and the lower pressure ring 42 and the flexible pressure plate 44 reset, releasing the clamping of terminal 1. After the top plate 35 moves up to the initial height, the rotating shaft 34 drives the top plate 35 to rotate through the rotating ring 48 and the guide rod 49 connected by the ball. The limiting rod 38 rotates out of the through hole 37 and returns to the initial position along the arc groove 36. The terminal 1 that has been tested is taken out from the receiving groove 23 of the base 22 to prepare for the next test.

[0070] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the electrical performance of a low-voltage control cabinet terminal (1), comprising a base cylinder (2), wherein a turntable (21) is rotatably disposed at the bottom of the base cylinder (2), characterized in that: Multiple circumferentially distributed bases (22) are embedded in the turntable (21). The bases (22) are provided with receiving grooves (23), which correspond to the terminals (1). They are constructed with an annular end (231) corresponding to the annular connecting part (11) and a guide groove section (232) corresponding to the conductive core (12). The bases (22) are provided with: Clamping assembly (3) for clamping terminal (1); A detector (5) located inside the bottom cylinder (2) for detecting the terminal (1); The clamping assembly (3) includes sliding rods (31) symmetrically arranged at the annular end (231) and slidably inserted. Lifting rings (32) are symmetrically arranged at the upper ends of the two sliding rods (31). Lifting springs (321) are arranged at the bottom of the sliding rods (31). Lifting blocks (33) are slidably inserted in the guide groove section (232). A flexible partition (331) is arranged at the upper end of the lifting block (33). A lifting spring (332) is arranged at the bottom of the lifting block (33).

2. The electrical performance testing device for low-voltage control cabinet terminals (1) according to claim 1, characterized in that: The clamping assembly (3) also includes a rotating shaft (34) rotatably passing through the turntable (21), a threaded section (341) is provided on the rotating shaft (34), and a top plate (35) that mates with the threaded section (341) is provided on the rotating shaft (34). An arc-shaped groove (36) is provided on the base (22), and a through hole (37) is provided on one side of the arc-shaped groove (36). A limit rod (38) is provided at the lower end of the top plate (35), and the limit rod (38) is located in the arc-shaped groove (36).

3. The electrical performance testing device for low-voltage control cabinet terminals (1) according to claim 2, characterized in that: The top plate (35) is provided with a top plate (4) that corresponds one-to-one with the base (22) around the upper ring. The top plate (4) is provided with a downward sliding rod (411). The lower end of the downward sliding rod (411) is provided with a downward ring (42) located directly above the lifting ring (32).

4. The electrical performance testing device for low-voltage control cabinet terminals (1) according to claim 3, characterized in that: A sliding rod (43) is slidably passed through the top plate (4). A flexible pressure plate (44) located directly above the lifting block (33) is provided at the lower end of the sliding rod (43). A downward pressure spring (45) is provided between the flexible pressure plate (44) and the top plate (4). A top cone (39) is provided at the center of the annular end (231) by a spring, and the top cone (39) has a conical surface (391) at the upper end.

5. The electrical performance testing device for low-voltage control cabinet terminals (1) according to claim 4, characterized in that: The lifting ring (32) is provided with an energized contact (46), and the flexible pressure plate (44) is provided with a conductive contact (47).

6. The electrical performance testing device for low-voltage control cabinet terminals (1) according to claim 2, characterized in that: The upper end of the rotating shaft (34) is connected to a rotating ring (48) by a ball. A guide rod (49) is provided on the rotating ring (48). The lower end of the guide rod (49) slides through the turntable (21).

7. The electrical performance testing device for low-voltage control cabinet terminals (1) according to claim 1, characterized in that: The detector (5) includes an energized ring (51) installed inside the bottom cylinder (2). The energized ring (51) is composed of multiple arc-shaped energized segments (511), and an insulating segment (512) is provided between two adjacent arc-shaped energized segments (511). One end of the base (22) is provided with a power block (52) that contacts the power ring (51).

8. The electrical performance testing device for a low-voltage control cabinet terminal (1) according to claim 7, characterized in that: The bottom cylinder (2) is provided with a cover plate (53) at the upper end. The cover plate (53) has windows (54) that correspond one-to-one with the base (22). The bottom of the cover plate (53) is provided with a conductive ring (55). The conductive ring (55) is composed of multiple arc-shaped conductive segments (551). An insulating block (552) is provided between two adjacent arc-shaped conductive segments (551).

9. The electrical performance testing device for a low-voltage control cabinet terminal (1) according to claim 8, characterized in that: A connecting rod (56) corresponding to the base (22) is slidably passed through the turntable (21), and a conductive block (57) is provided at the upper end of the connecting rod (56) to rotate and contact the conductive ring (55).

10. A method for testing the electrical performance of a low-voltage control cabinet terminal (1), comprising using a low-voltage control cabinet terminal (1) electrical performance testing device as described in any one of claims 1-9, characterized in that, Its usage includes the following steps: Step 1: Terminal (1) preparation: Place the terminal (1) to be tested into the receiving groove (23) of the base (22), embed the conductive core (12) of the terminal (1) into the guide groove section (232), and support the bottom of the conductive core (12) with the lifting block (33); Step 2: The terminal (1) is clamped, and the rotating shaft (34) drives the top plate (35) to rotate synchronously through the rotating ring (48) and guide rod (49) connected by the ball. The lower pressure ring (42) initially presses the annular connecting part (11), and the flexible pressure plate (44) presses the conductive core column (12). Step 3: Press down synchronously, the top plate (4) continues to move down, and by continuously increasing the clamping force, the annular connecting part (11) squeezes the top cone (39), and the radial component of the conical surface (391) eliminates the offset of the terminal (1), thereby realizing the axial clamping and radial positioning of the terminal (1); Step 4: Performance testing. The energized contact (46) is attached to the lower end of the annular connecting part (11), the conductive contact (47) on the flexible pressure plate (44) is attached to the top of the conductive core column (12), the energized block (52) slides in contact with the energized ring (51) inside the bottom cylinder (2), and a detection circuit is formed through the wire.

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