A transformer detection jig

Abstract

This utility model provides a fixture for transformer testing, including a fixed platform, a rotating disk and a first driving assembly on the fixed platform, a clamping assembly on the rotating disk, and a base with a positioning groove and a slot. Two clamping blocks and two springs are symmetrically arranged on the base, each clamping block having a variable diameter portion. A through groove is also provided on the base, located between the two clamping blocks, with the variable diameter portions of the two clamping blocks extending into the through groove. The springs correspond to and abut against the clamping blocks, driving them to move closer to the positioning groove. A wedge block and a second driving assembly are provided on the fixed platform. When the rotating disk rotates to the position where the through groove aligns with the wedge block, the second driving assembly drives the wedge block to extend into or retract from the through groove. This utility model solves the technical problems of poor transformer stability on the fixture and inconvenient removal when the existing rotary worktable rotates, resulting in the technical effect of ensuring the transformer's stable position during testing and facilitating transformer placement and removal.

Description

Technical Field

[0001] This utility model relates to the field of transformer testing technology, and in particular to a fixture for transformer testing. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are the primary coil, secondary coil, and iron core (magnetic core). Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer). During the production process, the electrical performance of the transformer needs to be tested.

[0003] Chinese utility model patent CN206331063U discloses a test fixture for a transformer testing platform. The fixture includes a fixed base with a limiting groove, at least one female socket, and at least one male connector. The female socket is located on the upper surface of the fixed base and on one side of the limiting groove. The upper end of the female socket has multiple lead-wire interfaces, the side has multiple pin interfaces, and the bottom has multiple male connectors. The lead-wire interfaces, pin interfaces, and male connectors are interconnected. The at least one male connector is located on the bottom of the fixed base and is inserted into the multiple male connectors. This test fixture has a simple structure, is easy to assemble and disassemble, and the number of female sockets and male connectors can be adjusted according to the actual product requirements. It is low-cost, adaptable to testing various products, widely applicable, and safe and simple to use.

[0004] When the test fixture disclosed in the above utility model patent is used, the transformer with leads to be tested is placed on the limiting groove of the fixed base. When the rotating worktable rotates, the stability of the transformer on the fixture is poor, which affects the stability of the connection between the transformer and the female socket. Moreover, after the transformer is placed in the limiting groove, it is partially or completely contained in the limiting groove, making it inconvenient to remove the transformer. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a fixture for transformer testing, which solves the problems of poor stability of the transformer on the fixture and inconvenience in removal when the rotary table rotates.

[0006] According to an embodiment of this utility model, a transformer testing fixture includes a fixed platform. A rotatable rotating disk and a first driving assembly connected to the rotating disk are mounted on the fixed platform. At least two clamping assemblies are spaced apart along the circumference of the rotating disk. Each clamping assembly includes a base, a positioning groove, and a slot communicating with the positioning groove. Two clamping blocks and two springs are symmetrically arranged on the base. The two clamping blocks are movably mounted on the base and are located on opposite sides of the positioning groove. Each clamping block has a variable diameter portion. The base also has a through-hole. The groove, the length of which is aligned with the radial direction of the rotating disk, is located between two clamping blocks, and the variable diameter parts on the two clamping blocks extend into the groove. The springs abut against the clamping blocks one by one and drive the clamping blocks to move towards the positioning groove. The fixed platform is provided with a wedge block that can move radially along the rotating disk and a second drive assembly that is connected to the wedge block. When the rotating disk rotates to the position where the groove and the wedge block are aligned, the second drive assembly drives the wedge block to extend into or out of the groove. When the wedge block extends into the groove, it is inserted between the two variable diameter parts and abuts against the two variable diameter parts respectively.

[0007] Furthermore, the first drive assembly includes a motor and a first sprocket disposed at the output end of the motor, and a second sprocket is provided on the rotating disk, with the first sprocket and the second sprocket being connected by a transmission chain.

[0008] Furthermore, the base is provided with a dovetail groove, and the clamping block is provided with a protrusion that cooperates with the dovetail groove.

[0009] Furthermore, the base is provided with a sliding groove communicating with the through groove, and the variable diameter part is movably disposed in the sliding groove.

[0010] Furthermore, the base is provided with a guide rod that extends into the groove, the variable diameter part is provided with a guide hole that cooperates with the guide rod, and the spring is sleeved on the guide rod.

[0011] Furthermore, each clamping block is provided with a flexible pad, which covers the side of the clamping block near the positioning groove.

[0012] Furthermore, the second drive assembly includes a cylinder and a piston rod disposed at the output end of the cylinder, and the wedge block is fixed to the end of the piston rod.

[0013] Furthermore, two wedge-shaped blocks and two second drive components are spaced apart on the fixed platform, and the second drive components are connected to the wedge-shaped blocks in a one-to-one transmission connection.

[0014] Furthermore, the fixed platform is equipped with a controller and a sensor that is drivenly connected to the controller. The first drive assembly and the second drive assembly are electrically connected to the controller. The sensor is located directly below the wedge block. Multiple sensing plates are spaced apart on the rotating disk. The sensing plates are located directly below the clamping assembly.

[0015] Compared with existing technologies, this utility model has the following advantages: By employing a clamping assembly mounted on a rotating disk to clamp the transformer to be tested, before the transformer is placed into the clamping assembly, the first drive assembly drives the rotating disk to rotate until the through groove on the base aligns with the wedge block. Then, the second drive assembly drives the wedge block to extend into the through groove and push the variable diameter part to move. During the movement of the wedge block, it drives the two clamping blocks to move away from the positioning groove. At this time, the transformer can be placed into the positioning groove. After the transformer is placed in, the second drive assembly drives the wedge block to exit the through groove. As the wedge block moves, the spring pushes the clamping blocks to move closer to the positioning groove until the transformer is clamped between the two clamping blocks, thus fixing the position of the transformer on the clamping assembly. The lead wire or pin is placed into the slot connected to the positioning slot. Then, the first drive component drives the rotating disk to rotate, moving the transformer and clamping assembly to the testing equipment to test the electrical performance of the transformer. After the test is completed, the rotating disk rotates again to align the through slot with the wedge block. The second drive component drives the wedge block to extend into the through slot and push the two clamping blocks away from the positioning slot to remove the tested transformer. When the clamping blocks move away from the positioning slot, a gap is formed between the clamping blocks and the positioning slot, which avoids the clamping blocks from obstructing the removal and placement of the transformer. This solves the technical problem of poor stability of the transformer on the fixture and inconvenience in removal when the existing rotating worktable rotates. It has the technical effect of ensuring the stable position of the transformer during the test and facilitating the removal and placement of the transformer. Moreover, it is simple to operate and highly reliable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a transformer testing fixture according to an embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of a transformer testing fixture according to an embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional view of the clamping assembly in a transformer testing fixture according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the clamping block in a transformer testing fixture according to an embodiment of the present invention.

[0020] In the above figures: 100, fixed platform; 200, rotating disk; 201, second sprocket; 300, first drive assembly; 301, motor; 302, first sprocket; 303, transmission chain; 400, clamping assembly; 401, base; 402, positioning groove; 403, slot; 404, clamping block; 405, spring; 406, variable diameter part; 407, through groove; 408, dovetail groove; 409, protrusion; 410, sliding groove; 411, guide rod; 412, guide hole; 413, flexible pad; 500, wedge block; 600, second drive assembly; 601, cylinder; 602, piston rod. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 4 As shown in the figure, this utility model embodiment proposes a fixture for transformer testing, which is used to clamp the transformer to be tested during the electrical performance testing of the transformer and to move the transformer to be tested between various testing devices.

[0023] Please refer to Figure 1 , Figure 2 and Figure 3The transformer testing fixture includes a fixed platform 100, on which a rotatable rotating disk 200 and a first drive assembly 300 are pulsatingly connected. At least two clamping assemblies 400 for holding the transformer to be tested are spaced apart along the circumference of the rotating disk 200. The first drive assembly 300 drives the rotating disk 200 to rotate, thus moving the clamping assembly 400 along with the clamped transformer between testing devices. The clamping assembly 400 includes a base 401, on which a positioning groove 402 and a connection to the positioning groove 402 are provided. A connected slot 403 is provided. The positioning slot 402 is used to place the transformer to be tested. After the transformer is placed in the positioning slot 402, the leads or pins on the transformer are inserted into the slot 403 to facilitate connection between the transformer and the testing equipment. Two clamping blocks 404 and two springs 405 are symmetrically provided on the base 401. The two clamping blocks 404 are movably disposed on the base 401 and are located on opposite sides of the positioning slot 402. Each clamping block 404 is provided with a variable diameter part 406. The base 401 is also provided with a through slot 407. The length direction of the through slot 407 is perpendicular to the rotation... The radial direction of the rotating disk 200 is consistent. The through groove 407 is located between the two clamping blocks 404, and the variable diameter portions 406 on the two clamping blocks 404 respectively extend into the through groove 407. The spring 405 abuts against the clamping blocks 404 one by one and drives the clamping blocks 404 to move towards the positioning groove 402. The elastic force provided by the spring 405 keeps the two clamping blocks 404 clamping the transformer placed in the positioning groove 402, so that the transformer's position on the clamping assembly 400 remains stable. The fixed table 100 is provided with a wedge block 50 that can move radially along the rotating disk 200. The second drive assembly 600, which is connected to the wedge block 500, drives the wedge block 500 to extend into or out of the through groove 407 when the rotating disk 200 rotates to the position where the through groove 407 is aligned with the wedge block 500. When the wedge block 500 extends into the through groove 407, it is inserted between the two variable diameter parts 406 and abuts against the two variable diameter parts 406 respectively. The wedge block 500 is used to push the two clamping blocks 404 away from each other so that a gap is formed between the clamping blocks 404 and the positioning groove 402, so as to facilitate the placement or removal of the transformer from the positioning groove 402.

[0024] Specifically, the operation steps for clamping the transformer to be tested using the transformer testing fixture provided in this embodiment are as follows: First, the first driving component 300 drives the rotating disk 200 to rotate until the through groove 407 is aligned with the wedge block 500. Then, the second driving component 600 drives the wedge block 500 to extend into the through groove 407 and push the variable diameter part 406 to move. During the movement of the wedge block 500, it drives the two clamping blocks 404 to move away from the positioning groove 402. At this time, the transformer can be placed into the positioning groove 402. After the transformer is placed, the second driving component 600 drives the wedge block 500 to exit the through groove 407. As the wedge block 500 moves, the spring 405 pushes the clamping blocks 404 closer to the positioning groove 402. The transformer is moved in a directional direction until it is clamped between the two clamping blocks 404, thus fixing its position on the clamping assembly 400. The transformer's leads or pins are inserted into the slot 403 to facilitate connection between the transformer and the testing equipment during the testing process. Then, the first driving assembly 300 drives the rotating disk 200 to rotate, moving the transformer and the clamping assembly 400 to the testing equipment for testing the transformer's electrical performance. When the transformer needs to be removed after testing, the first driving assembly 300 drives the rotating disk 200 to rotate again until the through slot 407 is aligned with the wedge block 500. The second driving assembly 600 drives the wedge block 500 to extend into the through slot 407 and push the two clamping blocks 404 away from the positioning slot 402, thus removing the tested transformer. The transformer testing fixture provided in this embodiment uses the elastic force provided by the spring 405 to keep the clamping block 404 holding the transformer, ensuring that the transformer's position remains stable and reliable during the testing process. When the wedge block 500 pushes the clamping block 404 away from the positioning groove 402, a gap is formed between the clamping block 404 and the positioning groove 402, which avoids the clamping block 404 from obstructing the removal and placement of the transformer, making it convenient to remove and place the transformer while simplifying the operation.

[0025] like Figure 2 As shown, the first drive assembly 300 includes a motor 301 and a first sprocket 302 disposed at the output end of the motor 301. The rotating disk 200 is provided with a second sprocket 201, and the first sprocket 302 and the second sprocket 201 are connected by a transmission chain 303. The power output by the motor 301 is transmitted to the rotating disk 200 through the cooperation of the first sprocket 302, the transmission chain 303, and the second sprocket 201, causing the rotating disk 200 to rotate smoothly under the drive of the motor 301, thereby enabling the clamping assembly 400 to move between various detection devices.

[0026] Please combine Figure 3 and Figure 4 The base 401 is provided with a dovetail groove 408, and the clamping block 404 is provided with a protrusion 409 that mates with the dovetail groove 408. The protrusion 409 on the clamping block 404 mates with the dovetail groove 408 on the base 401 to install the clamping block 404 onto the base 401, ensuring a stable fit between the clamping block 404 and the base 401 and preventing the clamping block 404 from detaching from the base 401 during movement.

[0027] In detail, the base 401 is provided with a sliding groove 410 communicating with the through groove 407, and the variable diameter part 406 is movably disposed within the sliding groove 410. The sliding groove 410 disposed on the base 401 is used to guide the variable diameter part 406 to move on the base 401, so that when the variable diameter part 406 is driven to move by the wedge block 500 or the spring 405, it remains to move along the pre-made direction, avoiding unexpected deviation when the clamping block 404 moves.

[0028] like Figure 3 As shown, the base 401 is provided with a guide rod 411 that extends into the slide groove 410. The variable diameter part 406 is provided with a guide hole 412 that mates with the guide rod 411. The spring 405 is sleeved on the guide rod 411. By providing the guide rod 411 on the base 401 and mates with the guide hole 412 on the variable diameter part 406, the stability of the engagement between the clamping block 404 and the base 401 is further improved. Furthermore, by sleeved on the guide rod 411, the opposite ends of the spring 405 in the extension / retraction direction are kept in contact with the clamping block 404 and the base 401, respectively, ensuring a secure engagement between the spring 405 and the clamping block 404.

[0029] like Figure 4 As shown, each clamping block 404 is provided with a flexible pad 413, which covers the side of the clamping block 404 near the positioning groove 402. The flexible pad 413 is provided on the side of the clamping block 404 that contacts the transformer. The flexible pad 413 is made of soft materials such as silicone, rubber, or foam to prevent the transformer from being damaged when the clamping block 404 clamps the transformer.

[0030] Please refer to Figure 1 and Figure 2The second drive assembly 600 includes a cylinder 601 and a piston rod 602 disposed at the output end of the cylinder 601. The wedge block 500 is fixed to the end of the piston rod 602. By using the cylinder 601 to drive the piston rod 602 to move, the movement of the piston rod 602 can drive the wedge block 500 to move, causing the wedge block 500 to extend into or retract from the through groove 407. This facilitates control of the clamping block 404 to release or clamp the transformer in the positioning groove 402.

[0031] In this embodiment, two wedge blocks 500 and two second drive assemblies 600 are spaced apart on the fixed platform 100, and the second drive assemblies 600 are connected to the wedge blocks 500 in a one-to-one transmission manner. By setting two wedge blocks 500 on the fixed platform 100 and setting the second drive assemblies 600 to drive the corresponding wedge blocks 500 to move, one wedge block 500 is used to drive the two clamping blocks 404 in the corresponding clamping assembly 400 to move away from each other when the transformer to be tested is placed into the positioning slot 402, and the other wedge block 500 is used to drive the two clamping blocks 404 in the corresponding clamping assembly 400 to move away from each other when the tested transformer is removed from the positioning slot 402. That is, the placement and removal of the transformer are completed at two separate workstations, so that the transformer testing fixture can remove the tested transformer while the transformer to be tested is being placed in, which helps to improve the working efficiency of the transformer testing fixture.

[0032] like Figure 1 As shown, the fixed platform 100 is equipped with a controller and a sensor connected to the controller. The first drive assembly 300 and the second drive assembly 600 are electrically connected to the controller. The sensor is located directly below the wedge block 500. Multiple sensing plates are spaced apart on the rotating disk 200, and these sensing plates are located directly below the clamping assembly 400. The angle of rotation of the rotating disk 200 is determined by the cooperation of the sensing plates and the sensor. When the corresponding sensing plate rotates to the position that triggers the sensor, the sensor sends a signal to the controller, which then controls the first drive assembly 300 to stop the rotation of the rotating disk 200. This stops the rotating disk 200 at the position where the through slot 407 aligns with the wedge block 500. At this point, the controller controls the second drive assembly 600 to cause the wedge block 500 to extend into and retract from the through slot 407, thereby improving the automation level of the transformer testing fixture. This allows the transformer testing fixture to cooperate with testing equipment to achieve automatic transformer testing, thus improving testing efficiency.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fixture for transformer testing, comprising a fixed platform, a rotatable rotating disk on the fixed platform, and a first driving assembly connected to the rotating disk in transmission, characterized in that: At least two clamping assemblies are spaced apart along the circumference of the rotating disk. Each clamping assembly includes a base, a positioning groove, and a slot communicating with the positioning groove. Two clamping blocks and two springs are symmetrically arranged on the base. The two clamping blocks are movably mounted on the base and are located on opposite sides of the positioning groove. Each clamping block has a variable diameter section. The base also has a through groove whose length direction is consistent with the radial direction of the rotating disk. The through groove is located between the two clamping blocks, and the variable diameter sections of the two clamping blocks extend into the through groove. The springs abut against the clamping blocks one by one and drive the clamping blocks to move closer to the positioning groove. A wedge block that can move radially along the rotating disk and a second drive assembly that is connected to the wedge block are provided on the fixed platform. When the rotating disk rotates to the position where the through groove is aligned with the wedge block, the second drive assembly drives the wedge block to extend into or out of the through groove. When the wedge block extends into the through groove, it is inserted between the two variable diameter sections and abuts against the two variable diameter sections respectively.

2. The transformer testing fixture as described in claim 1, characterized in that: The first drive assembly includes a motor and a first sprocket disposed at the output end of the motor. The rotating disk is provided with a second sprocket, and the first sprocket and the second sprocket are connected by a transmission chain.

3. The transformer testing fixture as described in claim 1, characterized in that: The base is provided with a dovetail groove, and the clamping block is provided with a protrusion that cooperates with the dovetail groove.

4. The transformer testing fixture as described in claim 1, characterized in that: The base is provided with a sliding groove that communicates with the through groove, and the variable diameter part is movably disposed in the sliding groove.

5. A transformer testing fixture as described in claim 4, characterized in that: The base is provided with a guide rod that extends into the groove, the variable diameter part is provided with a guide hole that cooperates with the guide rod, and the spring is sleeved on the guide rod.

6. The transformer testing fixture as described in claim 1, characterized in that: Each clamping block is provided with a flexible pad, which covers the side of the clamping block near the positioning groove.

7. The transformer testing fixture as described in claim 1, characterized in that: The second drive assembly includes a cylinder and a piston rod disposed at the output end of the cylinder, and the wedge block is fixed to the end of the piston rod.

8. The transformer testing fixture as described in claim 1, characterized in that: The fixed platform is provided with two wedge-shaped blocks and two second drive components at intervals, and the second drive components are connected to the wedge-shaped blocks in a one-to-one transmission connection.

9. A transformer testing fixture as described in claim 1, characterized in that: The fixed platform is equipped with a controller and a sensor that is drivenly connected to the controller. The first drive assembly and the second drive assembly are electrically connected to the controller. The sensor is located directly below the wedge block. Multiple sensing plates are spaced apart on the rotating disk. The sensing plates are located directly below the clamping assembly.

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