Coil conductor transposition tool

Abstract

A coil conductor transposition tool belongs to the technical field of transformer production, and includes a conductor, a fixing part, and an operating part. The conductor is clamped between the fixing part and the operating part, and the fixing part and the operating part are connected to each other. The fixing part includes a back plate and a front pressing plate. The front pressing plate is mounted on the back plate, and the front pressing plate presses the conductor against the back plate. The upper half of the back plate is an upper fixing plate, and the lower half of the back plate is a rear fixing plate. There is a height difference between the upper fixing plate and the rear fixing plate to form a step. A first hanging ear extends downward from the middle of the upper fixing plate, and the front pressing plate is mounted on the first hanging ear. The rear side of the top of the upper fixing plate has a transverse guide hole, and the transverse guide hole is connected to the operating part. The operating part includes a first pressing plate, a second pressing plate, a guide plate, and a follower plate. The first pressing plate is slidably mounted on the second pressing plate, the second pressing plate is slidably mounted on the guide plate, and the guide plate is slidably mounted on the follower plate.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer production, and in particular relates to a coil conductor transposition tool. Background Art

[0002] Coil windings are a crucial component of power transformers. Transposition technology is often used in today's transformer coil windings. Specifically, a certain number of enameled flat copper wires are combined into two rows whose wide sides touch each other. The enameled wires are then transposed in the same direction along their narrow sides, as required, above and below the two rows. The coils are then tightly wrapped with multiple layers of electrical insulating paper tape. The specific process involves bending the wires and transposing them to the side conductor layers. This can significantly reduce load losses, lower the temperature rise of winding hot spots, improve the mechanical strength of the windings, make the structure more compact, and simplify coil processing. During on-site operations, tools are required to bend the wires to ensure accuracy during transposition. Currently, the most commonly used bending tools are similar to manual wrenches, which bend the wires at a predetermined position and transpose them to the side conductor layers. The accuracy of this operation often relies on the operator's experience and operational skills. Summary of the Invention

[0003] The present invention provides a coil conductor transposition tool to solve the problems in the above-mentioned background technology.

[0004] The technical problem solved by the present invention is achieved by adopting the following technical solutions:

[0005] A coil wire transposition tool comprises a wire, a fixing part and an operating part. The wire is clamped between the fixing part and the operating part respectively, and the fixing part and the operating part are connected to each other.

[0006] The fixing portion includes a back plate and a front pressure plate. The front pressure plate is mounted on the back plate and presses the wires against the back plate. The upper half of the back plate is the upper fixing plate, and the lower half is the rear fixing plate. There is a height difference between the upper and rear fixing plates to form a step. A first mounting tab extends downward from the middle of the upper fixing plate, and the front pressure plate is mounted on the first mounting tab. The top rear side of the upper fixing plate has a transverse guide hole that connects to the operating portion.

[0007] The operating portion includes a first pressure plate, a second pressure plate, a guide plate, and a follower plate. The first pressure plate is slidably mounted on the second pressure plate, the second pressure plate is slidably mounted on the guide plate, and the guide plate is slidably mounted on the follower plate. The first pressure plate has a pair of small guide rods, which are fitted with a first spring and are fitted upwardly onto the second pressure plate. The upper portion of the second pressure plate is the front pressure plate, and the lower rear portion of the second pressure plate is the bottom pressure plate. A height difference forms a step between the front and bottom pressure plates. The front portion of the bottom pressure plate has a pair of first lugs, into which the small guide rods are fitted, and the small guide rods slide within the first lugs. The second pressure plate also has a pair of second lugs, which are connected and mounted to the guide plate and have waist-shaped holes therein. A second spring is located between the second lugs and the guide lugs of the guide plate and fits over the lower guide rods of the guide plate.

[0008] The guide plate has a pair of guide tabs, from which a lower guide rod extends downward and an upper guide rod extends upward. The lower guide rod is connected to the second pressure plate, and the upper guide rod is connected to the follower plate. A second mounting tab extends downward from the middle of the guide plate and is threadedly connected to the second pressure screw of the second pressure plate. A third spring fits over the upper guide rod and is located between the guide tab and the follower tab of the follower plate. The follower plate has a pair of follower tabs, which fit within the upper guide rod. A transverse guide rod is provided on the top and rear side of the follower plate, connected to the transverse guide hole, and a transverse spring fits over the transverse guide rod.

[0009] Furthermore, the rear end of the upper fixing plate has a first positioning fillet, which limits the bending position of the wire so that the wire forms a regular fillet at this position, thereby ensuring the bending quality of the wire.

[0010] Furthermore, the front of the front clamping plate has a first clamping ring, and the first clamping screw is hingedly installed in the first clamping ring. The first clamping cover covers the first clamping screw in the first clamping ring while keeping the first clamping screw rotating. The first clamping screw is threadedly connected to the first hanging ear. Rotating the first clamping screw can push the front clamping plate and tighten or loosen the wire.

[0011] Furthermore, the front end of the first pressing plate has a second positioning fillet, which limits the bending position of the wire so that the wire forms a regular fillet at this position, thereby ensuring the bending quality of the wire.

[0012] Furthermore, the second clamping plate also has a combination of a second clamping ring, a second clamping cover and a second clamping screw. The function of this combination is consistent with the similar combination on the front clamping plate, and it also realizes the clamping and loosening of the wire by the second clamping plate.

[0013] Furthermore, the elastic coefficients of the springs are in the following relationship: the first spring is slightly smaller than the second spring, much smaller than the third spring, much smaller than the transverse spring. When the guide plate is in the lower position, the lower edge of the guide plate is flush with the lower edge of the upper fixed plate.

[0014] The beneficial effects of the present invention are:

[0015] The present invention is used for the conductor transposition operation of the transformer coil winding. It has a precise positioning capability, can accurately align the position that needs to be bent and transposed, and accurately locate the spacing of the bending points. During the operation, the bottom and the front of the conductor are compressed at one time, and the offset distance of the conductor bending can be accurately controlled. During the entire process of the conductor bending, the axial tension of the conductor is provided, which can effectively ensure the bending quality of the conductor and effectively reduce the rebound of the conductor after bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the present invention;

[0017] Figure 2 It is a front view of the present invention;

[0018] Figure 3 is an exploded view of the present invention;

[0019] In the figure: 10. Wire, 20. Fixing part, 21. Back plate, 211. Upper fixing plate, 212. Rear fixing plate, 213. First positioning fillet, 214. First hanging ear, 215. Transverse guide hole, 22. Front clamping plate, 221. First clamping ring, 222. First clamping cover, 223. First clamping screw, 30. Operating part, 31. First clamping plate, 311. Second positioning fillet, 312. Small guide rod, 313. First spring, 32. Second clamping plate, 321. Front pressure plate, 322. Bottom pressure plate, 323. First ear, 324. Second ear, 325. Second pressure ring, 326. Second pressure cover, 327. Second pressure screw, 328. Second spring, 33. Guide plate, 331. Guide ear, 332. Lower guide rod, 333. Upper guide rod, 334. Second hanging ear, 335. Third spring, 34. Follower plate, 341. Follower ear, 342. Transverse guide rod, 343. Transverse spring. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive disclosure of the present invention.

[0021] See also Figure 1-Figure 3The coil wire transposition tool shown includes a wire 10, a fixing portion 20 and an operating portion 30. The wire 10 is clamped between the fixing portion 20 and the operating portion 30, and the fixing portion 20 and the operating portion 30 are connected to each other.

[0022] The fixing portion 20 includes a back plate 21 and a front pressing plate 22 . The front pressing plate 22 is mounted on the back plate 21 , and the front pressing plate 22 presses the wire 10 onto the back plate 21 .

[0023] The upper half of the back plate 21 is the upper fixing plate 211, and the lower half of the back plate 21 is the rear fixing plate 212. There is a height difference between the upper fixing plate 211 and the rear fixing plate 212 to form a step. The step is the part where the upper edge of the wire 10 is clamped. The rear end of the upper fixing plate 211 has a first positioning fillet 213. The first positioning fillet 213 limits the bending of the wire 10 so that the wire 10 forms a regular fillet here to ensure the bending quality of the wire. The first hanging ear 214 extends downward from the middle of the upper fixing plate 211, and the front clamping plate 22 is installed on the first hanging ear 214. The rear side of the top of the upper fixing plate 21 has a transverse guide hole 215, which is connected to the operating part 30.

[0024] The front clamping plate 22 has a first clamping ring 221 on the front side, and a first clamping screw 223 is hingedly installed in the first clamping ring 221. The first clamping cover 222 covers the first clamping screw 223 in the first clamping ring 221 while keeping the first clamping screw 223 rotating. The first clamping screw 223 is threadedly connected to the first hanging ear 214. Rotating the first clamping screw 223 can push the front clamping plate 22 and clamp or loosen the wire 10.

[0025] The operating part 30 includes a first pressing plate 31, a second pressing plate 32, a guide plate 33 and a follower plate 34. The first pressing plate 31 is slidably installed on the second pressing plate 32, the second pressing plate 32 is slidably installed on the guide plate 33, and the guide plate is slidably installed on the follower plate 34. The wire 10 is clamped between the second pressing plate 32 and the follower plate 34, and the upper and lower edges of the wire 10 are clamped by the first pressing plate 31 and the guide plate 33.

[0026] The front end of the first clamping plate 31 has a second positioning fillet 311, which limits the bending of the wire 10 so that the wire 10 forms a regular fillet here, ensuring the bending quality of the wire. There is a pair of small guide rods 312 on the first clamping plate 31, and a first spring 313 is installed on the small guide rods 312. The small guide rods 312 are upwardly fitted on the second clamping plate 32.

[0027] The upper part of the second pressing plate 32 is a front pressing plate 321, which presses the wire 10 from the front. The lower rear half of the second pressing plate 32 is a bottom pressing plate 322. There is a height difference between the front pressing plate 321 and the bottom pressing plate 322 to form a step, which presses the wire from the bottom edge of the wire 10. The front part of the bottom pressing plate 322 has a pair of first ear pieces 323, and a small guide rod 312 is installed in the first ear piece 323. The small guide rod 312 slides in the first ear piece 323. The second pressing plate 32 also has a pair of second ear pieces 324, and the second ear piece 324 is connected and installed with the guide plate 33. The second ear piece 324 has a waist-shaped hole. The structure of the waist-shaped hole allows the second pressing plate 32 to slide up and down together with the first pressing plate 31 to achieve the installation and pressing operation of the wire 10. The second clamping plate 32 also has a combination of a second clamping ring 325, a second clamping cover 326 and a second clamping screw 327. This combination has the same function as the similar combination on the front clamping plate 22, and also realizes the second clamping plate 32 to compress and relax the wire 10. The second spring 328 is located between the second ear 324 and the guide ear 331 of the guide plate 33 and is fitted on the lower guide rod 332 of the guide plate 33.

[0028] The guide plate 33 has a pair of guide tabs 331. A lower guide rod 332 extends downward from the guide tabs 331, and an upper guide rod 333 extends upward. The lower guide rod 332 is connected to the second compression plate 32, and the upper guide rod 333 is connected to the follower plate 34. A second mounting tab 334 extends downward from the middle of the guide plate 33. The second mounting tab 334 is threadedly connected to the second compression screw 327 of the second compression plate 32, thereby enabling the second compression plate 32 to tighten and loosen the conductor 10. A third spring 335 is sleeved on the upper guide rod 333 and is located between the guide tab 331 and the follower tab 341 of the follower plate 34.

[0029] The follower plate 34 has a pair of follower ears 341, and the upper guide rod 333 is installed in the follower ears 341. A transverse guide rod 342 is provided on the rear side of the top of the follower plate 34, and the transverse guide rod 342 is connected to the transverse guide hole 215. A transverse spring 343 is installed on the transverse guide rod 342. The transverse spring 343 always pushes the follower plate 34 to have a tendency to move backward, and applies tension to the wire throughout the entire process of the wire bending, which can effectively improve the bending quality of the wire and reduce the rebound of the wire after bending, thereby improving dimensional accuracy.

[0030] In this technical solution, the elastic coefficients of the springs are as follows: the first spring 313 is slightly smaller than the second spring 328, much smaller than the third spring 335, and much smaller than the transverse spring 343. When the guide plate 33 is in the lower position, the lower edge of the guide plate 33 is flush with the lower edge of the upper fixed plate 211.

[0031] The working principle of the present invention is as follows: when the entire transposition tool is in a free state, the front clamping plate 22 is in a relaxed state, the first clamping plate 31 is in a lower position, the second clamping plate 32 is in a lower position and in a relaxed state, and the guide plate 33 is in a lower position. At this time, the wire 10 to be transposed is inserted between the front clamping plate 22 and the rear fixing plate 212 through the lower gap, and the first clamping screw 223 is tightened to compress the wire 10. The follower plate 34 is pushed laterally so that the spacing between the second positioning fillet 311 and the first positioning fillet 213 is the predetermined wire bending spacing. This position is maintained, and the first clamping plate 31 is pressed upward so that the first clamping plate 31 is aligned with the bottom edge of the wire 10. The second clamping plate 32 is then pressed so that the step between the front clamping plate 321 and the bottom clamping plate 322 is aligned with the bottom edge of the wire 10. The second clamping screw 327 is then tightened, and the second clamping plate 32 now compresses the wire 10. The first and second pressing plates 31 and 32 are then pressed together, causing them to compress the third spring 335 until the guide plate 33 has moved a predetermined distance to the wire transposition spacing, completing the bending operation. Throughout this process, the transverse spring 343 continuously provides a transverse thrust, ensuring that an axial tension is constantly applied to the wire 10. Of course, it is important to note that the order in which the wire 10 is released after the bending operation is complete requires careful attention. The second pressing screw 327 should be loosened first to release the bent wire 10, and then the individual springs should be released to prevent the rebound force of the individual springs from adversely affecting the wire.

[0032] The above embodiments primarily illustrate the coil conductor transposition tool of the present invention. While only a limited number of embodiments and technical features have been described, those skilled in the art will appreciate that the present invention may be implemented in numerous other forms without departing from its spirit and scope. Therefore, the illustrated embodiments are to be considered illustrative rather than restrictive, and the present invention may encompass various modifications and alternatives without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A coil conductor transposition tool, comprising a conductor (10), a fixing portion (20) and an operating portion (30), characterized in that: The wires (10) are respectively clamped between the fixing portion (20) and the operating portion (30), and the fixing portion (20) and the operating portion (30) are connected to each other. The fixing portion (20) includes a back plate (21) and a front pressing plate (22), and the front pressing plate (22) is installed on the back plate (21). The front pressing plate (22) presses the wires (10) on the back plate (21). The upper half of the back plate (21) is an upper fixing plate (211), and the lower half of the back plate (21) is a rear fixing plate (212). There is a height difference between the upper fixing plate (211) and the rear fixing plate (212) to form a step. A first hanging ear piece (214) extends downward from the middle of the upper fixing plate (211), and the front pressing plate (22) is installed on the first hanging ear piece (214). The upper fixed plate (211) has a transverse guide hole (215) on the rear side of the top, and the transverse guide hole (215) is connected to the operating part (30). The operating part (30) includes a first pressing plate (31), a second pressing plate (32), a guide plate (33) and a follower plate (34). The first pressing plate (31) is slidably mounted on the second pressing plate (32), the second pressing plate (32) is slidably mounted on the guide plate (33), and the guide plate is slidably mounted on the follower plate (34). The wire (10) is clamped between the second pressing plate (32) and the follower plate (34). At the same time, the upper and lower edges of the wire (10) are clamped by the first pressing plate (31) and the guide plate (33). A pair of small guide rods (312) are provided on the first pressing plate (31). The small guide rods (312) is fitted with a first spring (313), the small guide rod (312) is fitted upwardly on the second pressing plate (32), the upper part of the second pressing plate (32) is a front pressing plate (321), the front pressing plate (321) presses the wire (10) from the front, the lower rear half of the second pressing plate (32) is a bottom pressing plate (322), there is a height difference between the front pressing plate (321) and the bottom pressing plate (322) to form a step, the front part of the bottom pressing plate (322) has a pair of first ear pieces (323), the small guide rod (312) is fitted in the first ear piece (323), the small guide rod (312) slides in the first ear piece (323), and the second pressing plate (32) also has a pair of second ear pieces (324) The second ear piece (324) is connected and installed with the guide plate (33), and a waist-shaped hole is provided in the second ear piece (324). The second spring (328) is located between the second ear piece (324) and the guide ear piece (331) of the guide plate (33) and is sleeved on the lower guide rod (332) of the guide plate (33). The guide plate (33) has a pair of guide ear pieces (331). The guide ear piece (331) extends downward to the lower guide rod (332) and extends upward to the upper guide rod (333). The lower guide rod (332) is connected to the second pressing plate (32), and the upper guide rod (333) is connected to the follower plate (34). The middle part of the guide plate (33) extends the second hanging ear piece (334) downward, and the third spring (335) is sleeved on the upper guide rod (333).Located between the guide ear piece (331) and the follower ear piece (341) of the follower plate (34), the follower plate (34) has a pair of follower ear pieces (341), the follower ear pieces (341) are fitted with the guide rod (333), the top rear side of the follower plate (34) has a transverse guide rod (342), the transverse guide rod (342) is connected to the transverse guide hole (215), and the transverse spring (343) is fitted on the transverse guide rod (342).

2. The coil conductor transposition tool according to claim 1, wherein: The rear end of the upper fixing plate (211) has a first positioning fillet (213), and the first positioning fillet (213) limits the bending position of the wire (10) so that the wire (10) forms a regular fillet at this position.

3. The coil conductor transposition tool according to claim 1, wherein: The front pressing plate (22) has a first pressing ring (221) on its front side, a first pressing screw (223) is hingedly installed in the first pressing ring (221), a first pressing cover (222) covers the first pressing screw (223) in the first pressing ring (221), and the first pressing screw (223) is threadedly connected to the first hanging ear (214).

4. The coil conductor transposition tool according to claim 1, wherein: The front end of the first pressing plate (31) has a second positioning fillet (311), and the second positioning fillet (311) limits the bending portion of the wire (10) so that the wire (10) forms a regular fillet at this location.

5. The coil conductor transposition tool according to claim 1, wherein: The second pressing plate (32) also has a combination of a second pressing ring (325), a second pressing cover (326) and a second pressing screw (327), and the function of this combination is consistent with that of a similar combination on the front pressing plate (22).

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