Automatic wire twisting device for mutual inductor
By using a DC motor and buffer mechanism in the automatic wire winding device, the problems of cumbersome wire feeding and messy winding in the existing technology are solved, achieving efficient and precise wire winding, and improving production efficiency and equipment flexibility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAXING WISDOM ELECTRONICS TECH
- Filing Date
- 2025-04-24
- Publication Date
- 2026-05-05
AI Technical Summary
The existing automatic wire stranding device for current transformers is cumbersome in the wire feeding process, requiring manual threading and fixing, which is prone to tangling and mess, and cannot meet the diverse production needs.
An automatic stranding device is adopted, which includes a DC motor, an electric telescopic rod, an L-shaped clamp, and a U-shaped plate. The electric telescopic rod clamps the wire, and the DC motor drives the turntable to strand the wire. Combined with a buffer mechanism and the sliding block and buffer spring of the U-shaped block, the winding accuracy and stability are ensured.
The automated wire feeding and winding process has been achieved, which has improved the accuracy and consistency of stranding, reduced manual operation, and increased production efficiency and equipment flexibility.
Smart Images
Figure CN224203950U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stranding equipment technology, and in particular to an automatic stranding device for current transformers. Background Technology
[0002] In the field of electrical equipment manufacturing, automatic stranding devices for instrument transformers play a crucial role. They are mainly used to strand the conductors, providing a basic guarantee for the normal operation of instrument transformers. With the development of the power industry, the requirements for the performance and production efficiency of instrument transformers are increasing, and automatic stranding devices are also constantly being updated and upgraded.
[0003] Early automatic stranding devices for instrument transformers had relatively simple structures and mostly relied on manual operation or semi-automatic control. Operators had to manually feed the wires and adjust parameters, which was not only labor-intensive but also made it difficult to guarantee the accuracy and consistency of the stranded wires, resulting in low production efficiency. With technological advancements, automatic stranding equipment with electronic control panels emerged, integrating automatic counting and speed adjustment functions, which improved the level of automation and stranded wire quality to some extent. However, existing automatic stranding devices still have shortcomings. In actual operation, the wire feeding process is still quite cumbersome, requiring careful manual threading and fixing, which is time-consuming and prone to wire tangling and messiness, resulting in poor flexibility and versatility, making it difficult to meet diverse production needs. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides an automatic wire stranding device for current transformers, which aims to improve the problem that the wire feeding process in the prior art is still relatively cumbersome, requiring manual threading and fixing, which is time-consuming and prone to wire tangling.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic stranding device for a current transformer, comprising a body, a DC motor fixedly connected to the bottom of the inner wall of the body, the output end of the DC motor passing through the body and fixedly connected to a turntable, electric telescopic rods fixedly connected to the upper and lower sides of the outer wall of the turntable, an L-shaped clamp fixedly connected to one end of the electric telescopic rod, a hollow block fixedly connected to the front side of the body, a U-shaped plate provided on the front side of the hollow block, and hinges fixedly connected to the left and right sides of the top of the U-shaped plate. The U-shaped plate is rotatably connected to the top of the hollow block via two hinges. The U-shaped block is slidably connected to the inner wall of the U-shaped plate. Limiting grooves are formed on both the left and right sides of the outer wall of the hollow block. U-shaped limiting plates are slidably connected to the inner walls of the two limiting grooves. The inner walls of the U-shaped limiting plates engage with the outer walls of the U-shaped plate. A display screen is fixedly connected to the left front end of the machine body, and multiple control keyboards are fixedly connected to the right front end of the machine body. A buffer mechanism is provided on the inner wall of the U-shaped block to accommodate the contraction during wire twisting.
[0006] As a further description of the above technical solution:
[0007] The buffer mechanism includes a U-shaped sliding block, the outer wall of which is slidably connected to the inner wall of the U-shaped block. A limiting groove is provided at the bottom of the U-shaped block. An arc-shaped baffle is fixedly connected to the bottom end of the U-shaped sliding block. A buffer spring is fixedly connected to the outer wall of the arc-shaped baffle. The other end of the buffer spring is fixedly connected to the bottom end of the U-shaped block. A stop bar is fixedly connected to both the left and right sides of the inner wall of the U-shaped sliding block. A fastening screw is threadedly connected to the right side of the outer wall of the U-shaped block. A washer is provided on the outer wall of the fastening screw. The outer wall of the fastening screw engages with the inner wall of the washer.
[0008] As a further description of the above technical solution:
[0009] A U-shaped handle is provided at the top center of the machine body, and the inner wall of the U-shaped handle is threaded with fixing bolts.
[0010] As a further description of the above technical solution:
[0011] A column is fixedly connected to the top left side of the fuselage, and an alarm light is fixedly connected to the top of the column.
[0012] As a further description of the above technical solution:
[0013] A nameplate is fixedly connected to the front right side of the outer wall of the machine body, and a warning sign block is fixedly connected to the middle right side of the outer wall of the machine body.
[0014] As a further description of the above technical solution:
[0015] A breathable mesh is fixedly connected to the right side of the outer wall of the machine body, and an outer frame is fixedly connected to the outer wall of the breathable mesh. A power switch is fixedly connected to the front top of the machine body.
[0016] As a further description of the above technical solution:
[0017] The turntable has a sliding groove on its front side, and the outer wall of the sliding groove is slidably connected to the outer wall of the L-shaped clamp. The outer wall of the L-shaped clamp has an anti-slip groove.
[0018] As a further description of the above technical solution:
[0019] A limiting baffle is fixedly connected to the front side of the machine body, and a push block is fixedly connected to the bottom end of the U-shaped limiting plate.
[0020] This utility model has the following beneficial effects:
[0021] 1. In this utility model, by placing the current transformer above the L-shaped clamping plate, starting the electric telescopic rod to move the clamping plate to hold one end of the connecting wire, then placing the current transformer on the U-shaped block and moving it forward until the line is straightened, starting the DC motor to drive the turntable to rotate, and the holding end of the connecting wire rotates accordingly, winding the connecting wire and pulling the current transformer and the U-shaped block backward. By controlling the power and time of the DC motor, the winding of the connecting wire above the current transformer is automatically completed.
[0022] 2. In this utility model, by placing the connecting wire between the stop bars, rotating the fastening screw to loosen the U-shaped block, adjusting the position of the U-shaped block according to the length of the connecting wire, rotating the fastening screw and using the shim to increase friction, the U-shaped plate and the U-shaped block are firmly connected. When the DC motor rotates, the connecting wire drives the current transformer to move, the U-shaped sliding block slides inside the U-shaped block, pulls the buffer spring to the extended state, and stops the motor after reaching the set length. The wound current transformer is then removed, thereby ensuring the winding accuracy and preventing the connecting wire from breaking. Attached Figure Description
[0023] Figure 1 This is a perspective view of an automatic stranding device for a current transformer proposed in this utility model;
[0024] Figure 2 This is a front view of an automatic stranding device for a current transformer proposed in this utility model;
[0025] Figure 3 This is a top view of an automatic stranding device for a current transformer proposed in this utility model;
[0026] Figure 4 This is a cross-sectional view of the body of an automatic stranding device for a current transformer proposed in this utility model;
[0027] Figure 5 This is a split view of a hollow block for an automatic stranding device for a current transformer, as proposed in this utility model.
[0028] Figure 6 This is an exploded view of the buffer mechanism of an automatic stranding device for a current transformer proposed in this utility model.
[0029] Legend:
[0030] 1. Body; 2. Buffer mechanism; 201. Limiting groove; 202. U-shaped sliding block; 203. Stop bar; 204. Arc-shaped baffle; 205. Buffer spring; 206. Fastening screw; 207. Washer; 3. DC motor; 4. Turntable; 5. Electric telescopic rod; 6. L-shaped clamp; 7. Hollow block; 8. U-shaped plate; 9. Hinge; 10. U-shaped block; 11. U-shaped limit plate; 12. Limiting groove; 13. Display screen; 14. Control keyboard; 15. U-shaped handle; 16. Fixing bolt; 17. Column; 18. Warning light; 19. Nameplate; 20. Warning sign block; 21. Ventilation mesh; 22. Outer frame; 23. Power switch; 24. Sliding groove; 25. Anti-slip groove; 26. Limiting baffle; 27. Push block. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of an automatic stranding device for a current transformer, comprising a body 1. A DC motor 3 is fixedly connected to the bottom of the inner wall of the body 1. The output end of the DC motor 3 passes through the body 1 and is fixedly connected to a turntable 4. Electric telescopic rods 5 are fixedly connected to the upper and lower sides of the outer wall of the turntable 4. Activating the electric telescopic rods 5 drives the L-shaped clamps 6 to move relative to each other, thereby clamping one end of the connecting wire located between them. One end of the electric telescopic rod 5 is fixedly connected to the L-shaped clamps 6. The current transformer to be stranded is placed on top of the L-shaped clamps 6. A hollow block 7 is fixedly connected to the front side of the body 1. A U-shaped plate 8 is provided on the front side of the hollow block 7. Hinges 9 are fixedly connected to the left and right sides of the top of the U-shaped plate 8. The U-shaped plate 8 is connected to the top of the hollow block 7 through the two hinges 9. A U-shaped block 10 is slidably connected to the inner wall of the U-shaped plate 8 via a rotary connection. The current transformer is placed on top of the U-shaped block 10, and the U-shaped block 10 is moved forward on top of the U-shaped plate 8 until the entire line is straightened. Limiting grooves 12 are provided on the left and right sides of the outer wall of the hollow block 7. U-shaped limiting plates 11 are slidably connected to the inner walls of the two limiting grooves 12. The inner walls of the U-shaped limiting plates 11 are engaged with the outer walls of the U-shaped plate 8. Pushing the U-shaped limiting plates 11 can release the support and engagement of the U-shaped plate 8. A display screen 13 is fixedly connected to the left front end of the machine body 1. The display screen 13 can display the current operating status. Multiple control keyboards 14 are fixedly connected to the right front end of the machine body 1. The control keyboards 14 can set the operating parameters of the equipment. A buffer mechanism 2 is provided on the inner wall of the U-shaped block 10. The buffer mechanism 2 is used to adapt to the contraction during twisting.
[0033] Specifically, the current transformer to be twisted is placed with one end of its connecting wire positioned above the L-shaped clamp 6. Then, the electric telescopic rod 5 is activated to move the L-shaped clamp 6 relative to the current transformer, clamping one end of the connecting wire. The current transformer is then placed above the U-shaped block 10, and the U-shaped block 10 is moved forward above the U-shaped plate 8 until the entire line is straightened. At this point, the DC motor 3 is activated to rotate the turntable 4. Because the current transformer is clamped above the U-shaped block 10, when the turntable 4 rotates the connecting wire clamped by the L-shaped clamp 6, two or more connecting wires will become entangled. This entanglement shortens the connecting wires, pulling the current transformer and causing the U-shaped block 10 to move backward. By controlling the operating power and time of the DC motor 3, the winding of the connecting wire above the current transformer is completed. By pushing the U-shaped limiting plate 11, the support and clamping of the U-shaped plate 8 can be released, allowing the U-shaped plate 8 to be folded up via the hinge 9 for manual winding.
[0034] Reference Figure 3 , Figure 5 and Figure 6 The buffer mechanism 2 includes a U-shaped sliding block 202. The outer wall of the U-shaped sliding block 202 is slidably connected to the inner wall of the U-shaped block 10. A limiting groove 201 is provided at the bottom of the U-shaped block 10. An arc-shaped baffle 204 is fixedly connected to the bottom end of the U-shaped sliding block 202. A buffer spring 205 is fixedly connected to the outer wall of the arc-shaped baffle 204. The other end of the buffer spring 205 is fixedly connected to the bottom end of the U-shaped block 10. When the connecting line pulls the current transformer to move, the U-shaped sliding block 202 will slide in the U-shaped block 10 and pull the buffer spring 205, causing it to be stretched. The inner walls of the U-shaped sliding block 202 are fixed on both the left and right sides. A stop bar 203 is fixedly connected. The upper connecting line is placed between the stop bars 203. A fastening screw 206 is threadedly connected to the right side of the outer wall of the U-shaped block 10. Rotating the fastening screw 206 releases the fixation of the position of the U-shaped block 10, allowing the U-shaped block 10 to be moved according to the length of different connecting lines. Then, rotating the fastening screw 206 fixes the moved position. A washer 207 is provided on the outer wall of the fastening screw 206. The outer wall of the fastening screw 206 engages with the inner wall of the washer 207. Under the action of the washer 207, the friction between the fastening screw 206 and the U-shaped plate 8 is increased, so that the two can be firmly fixed together.
[0035] Specifically, when placing the current transformer in the U-shaped block 10, the connecting wire above is placed between the stop bars 203, and the position of the U-shaped block 10 is released by rotating the fastening screw 206. The U-shaped block 10 is moved according to the length of the connecting wire, and then the fastening screw 206 is rotated to fix the moved position. Under the action of the washer 207, the friction between the fastening screw 206 and the U-shaped plate 8 is increased, so that the two can be firmly fixed together. Then, when the DC motor 3 rotates, the connecting wire pulls the current transformer to move. At this time, the U-shaped sliding block 202 will slide in the U-shaped block 10 and pull the buffer spring 205, so that it is stretched. When it is stretched to a certain length, the rotation of the DC motor 3 is stopped, and then the wound current transformer can be removed, so that the winding accuracy is more accurate and the over-winding causes the connecting wire to break.
[0036] Reference Figure 1 , Figure 2 and Figure 3 A U-shaped handle 15 is provided at the top center of the body 1, and the inner wall of the U-shaped handle 15 is threaded with fixing bolts 16; a column 17 is fixedly connected to the top left of the body 1, and an alarm light 18 is fixedly connected to the top of the column 17; a nameplate 19 is fixedly connected to the front right side of the outer wall of the body 1, and a warning sign block 20 is fixedly connected to the middle right side of the outer wall of the body 1.
[0037] Specifically, the U-shaped handle 15 allows for easy lifting or pushing of the machine body 1, greatly improving the ease of equipment movement. The fixing bolts 16 ensure that the U-shaped handle 15 is firmly connected to the machine body 1, preventing safety hazards caused by handle shaking during equipment operation. The column 17 effectively connects the alarm light 18 to the machine body 1. In case of abnormal conditions during operation, the alarm light 18 emits a clear light signal, reminding operators to pay attention to the operating status of the equipment and take appropriate measures to solve the problem quickly, avoiding equipment damage or safety accidents. The nameplate 19 allows operators to accurately understand the various parameters and performance of the equipment by viewing the information on the nameplate 19, thus enabling correct operation and maintenance. The warning sign block 20 reminds operators to pay attention to relevant safety matters when operating the equipment, avoiding accidents caused by negligence, and playing an important safety reminder role.
[0038] Reference Figure 1 , Figure 4 and Figure 5 A breathable mesh 21 is fixedly connected to the right side of the outer wall of the body 1, allowing air to circulate freely inside and outside the body 1. An outer frame 22 is fixedly connected to the outer wall of the breathable mesh 21, which protects and fixes the breathable mesh 21. A power switch 23 is fixedly connected to the front top of the body 1, which can easily turn the power of the device on or off. A sliding groove 24 is provided on the front side of the turntable 4, and the outer wall of the sliding groove 24 slides against the outer wall of the L-shaped clamp 6. The sliding groove 24 provides a sliding track and space for the L-shaped clamping plate 6. The outer wall of the L-shaped clamping plate 6 is provided with an anti-slip groove 25, which can enhance the friction of the L-shaped clamping plate 6 when clamping items. A limiting baffle 26 is fixedly connected to the front side of the machine body 1. The limiting baffle 26 can limit and block, and provide support for the installed hollow block 7. A push block 27 is fixedly connected to the bottom end of the U-shaped limiting plate 11, which can facilitate the operator to operate the U-shaped limiting plate 11.
[0039] Specifically, the breathable mesh 21 allows air to circulate freely inside and outside the machine body 1, allowing cold air from the outside to enter the machine body 1, carry away heat, and then be discharged, effectively reducing the internal temperature of the machine body 1 and ensuring stable operation of the equipment. The outer frame 22 protects and fixes the breathable mesh 21. The power switch 23 allows the power of the equipment to be easily turned on or off. The sliding groove 24 provides a sliding track and space for the L-shaped clamp 6. The anti-slip groove 25 enhances the friction of the L-shaped clamp 6 when clamping items. The limiting baffle 26 restricts and blocks, providing support for the installed hollow block 7. The push block 27 facilitates the operation of the U-shaped limiting plate 11 by the operator.
[0040] Working principle: When using this device to twist the wires of the current transformer, place one end of the connecting wire above the current transformer on the L-shaped clamp 6. Then, start the electric telescopic rod 5, which will drive the L-shaped clamp 6 to move relative to each other, thereby firmly clamping one end of the connecting wire. Then, place the current transformer on the U-shaped block 10 and push the U-shaped block 10 forward along the U-shaped plate 8 until the line is straightened. At this time, start the DC motor 3, which will drive the turntable 4 to rotate. Since the current transformer is clamped on the U-shaped block 10, when the turntable 4 rotates, the end of the connecting wire clamped by the L-shaped clamp 6 will rotate accordingly, causing two or more connecting wires to wrap around each other. As the wrapping proceeds, the connecting wires gradually become shorter, thereby pulling the current transformer and driving the U-shaped block 10 to move backward. If manual wrapping is required, push the U-shaped limit plate 11 to release its support and clamping on the U-shaped plate 8. The U-shaped plate 8 can then be folded up by the hinge 9 for operation. By controlling the operating power and time of the DC motor 3, the wrapping work of the connecting wire above the current transformer can be completed.
[0041] Furthermore, through the buffer mechanism 2, during the installation of the current transformer onto the U-shaped block 10, the upper connecting wire is first placed between the stop bars 203. Then, by rotating the fastening screw 206, the locking of the position of the U-shaped block 10 is released. The position of the U-shaped block 10 is adjusted according to the length of the connecting wire. Then, the fastening screw 206 is rotated again to fix the adjusted position. Under the action of the shim 207, the friction between the fastening screw 206 and the U-shaped plate 8 is increased to ensure that the two are tightly fixed. When the DC motor 3 starts, the connecting wire pulls the current transformer to move. At this time, the U-shaped sliding block 202 slides inside the U-shaped block 10 and pulls the buffer spring 205 to extend it. When the buffer spring 205 extends to a specific length, the operation of the DC motor 3 is stopped. At this time, the wound current transformer can be removed to ensure the accuracy of the winding and avoid the connection wire from breaking due to over-winding.
[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automatic stranding device for a current transformer, comprising a body (1), characterized in that: A DC motor (3) is fixedly connected to the bottom of the inner wall of the body (1). The output end of the DC motor (3) passes through the body (1) and is fixedly connected to a turntable (4). Electric telescopic rods (5) are fixedly connected to the upper and lower sides of the outer wall of the turntable (4). An L-shaped clamp (6) is fixedly connected to one end of the electric telescopic rod (5). A hollow block (7) is fixedly connected to the front side of the body (1). A U-shaped plate (8) is provided on the front side of the hollow block (7). Hinges (9) are fixedly connected to the top left and right sides of the top of the U-shaped plate (8). The U-shaped plate (8) is connected to the top of the hollow block (7) through the two hinges (9). The U-shaped plate (8) is slidably connected to the inner wall of the U-shaped plate (8). The hollow block (7) has limit grooves (12) on both the left and right sides of its outer wall. The inner walls of the two limit grooves (12) are slidably connected to U-shaped limit plates (11). The inner wall of the U-shaped limit plate (11) is engaged with the outer wall of the U-shaped plate (8). The front left side of the machine body (1) is fixedly connected to a display screen (13). The front right side of the machine body (1) is fixedly connected to multiple operating keyboards (14). The inner wall of the U-shaped block (10) is provided with a buffer mechanism (2). The buffer mechanism (2) is used to adapt to the shrinkage during twisting.
2. The automatic stranding device for a current transformer according to claim 1, characterized in that: The buffer mechanism (2) includes a U-shaped sliding block (202), the outer wall of which is slidably connected to the inner wall of the U-shaped block (10). A limiting groove (201) is provided at the bottom of the U-shaped block (10). An arc-shaped baffle (204) is fixedly connected to the bottom end of the U-shaped sliding block (202). A buffer spring (205) is fixedly connected to the outer wall of the arc-shaped baffle (204). The other end of the buffer spring (205) is fixedly connected to the bottom end of the U-shaped block (10). A stop bar (203) is fixedly connected to both the left and right sides of the inner wall of the U-shaped sliding block (202). A fastening screw (206) is threadedly connected to the right side of the outer wall of the U-shaped block (10). A washer (207) is provided on the outer wall of the fastening screw (206). The outer wall of the fastening screw (206) engages with the inner wall of the washer (207).
3. An automatic stranding device for a current transformer according to claim 1, characterized in that: A U-shaped handle (15) is provided at the top center of the body (1), and the inner wall of the U-shaped handle (15) is threaded with fixing bolts (16).
4. An automatic stranding device for a current transformer according to claim 1, characterized in that: A column (17) is fixedly connected to the top left side of the fuselage (1), and an alarm light (18) is fixedly connected to the top of the column (17).
5. An automatic stranding device for a current transformer according to claim 1, characterized in that: A nameplate (19) is fixedly connected to the front right side of the outer wall of the fuselage (1), and a warning sign block (20) is fixedly connected to the middle right side of the outer wall of the fuselage (1).
6. An automatic stranding device for a current transformer according to claim 1, characterized in that: A breathable mesh (21) is fixedly connected to the right side of the outer wall of the body (1), and an outer frame (22) is fixedly connected to the outer wall of the breathable mesh (21). A power switch (23) is fixedly connected to the front top of the body (1).
7. An automatic stranding device for a current transformer according to claim 1, characterized in that: The turntable (4) has a sliding groove (24) on its front side. The outer wall of the sliding groove (24) is slidably connected to the outer wall of the L-shaped clamp (6). The outer wall of the L-shaped clamp (6) has an anti-slip groove (25).
8. An automatic stranding device for a current transformer according to claim 1, characterized in that: A limiting baffle (26) is fixedly connected to the front side of the body (1), and a push block (27) is fixedly connected to the bottom end of the U-shaped limiting plate (11).