A flat wire stator twisting fixture

Abstract

This invention discloses a flat wire stator twisting fixture, comprising a base on which a twisting turntable is mounted; a twisting assembly comprising a first twisting die fixed to the twisting turntable by an inner pressure ring, and a second, third, and fourth twisting dies nested sequentially on the first twisting die, the first and third twisting dies being fixedly connected, and the second and fourth twisting dies being fixedly connected, all being annular in shape, with several wire insertion slots arranged circumferentially on their tops; a torsion arm mechanism for synchronously and in reverse twisting the first, third, second, and fourth twisting dies is provided between the twisting turntable and the fourth twisting die; and an outer pressure ring fixedly connected to the base and fitted onto the fourth twisting die. This solution achieves overall twisting of the flat wire stator in a single assembly, avoiding errors caused by multiple twisting operations, and offers convenient twisting operation, high twisting efficiency, and strong consistency in twisting angle and height.

Description

Technical Field

[0001] This invention relates to the field of flat wire stator twisting technology, and more specifically to a flat wire stator twisting tool. Background Technology

[0002] Existing flat wire stator twisting fixtures generally include two sets of twisting fixtures: one set for the first and second layers, and another set for the third and fourth layers. During twisting, the third and fourth layers of flat wire are twisted first, followed by the first and second layers; the twisting is completed in two stages. While this method is direct, it has the following drawbacks: First, the angle synchronization between the wires is poor due to the two-stage twisting, resulting in angle and height differences between the first and second layers and the third and fourth layers. Second, when twisting the third and fourth layers, the space of the first and second layers is compressed in the radial direction, making it difficult for the first and second layers to enter the mold, and reducing the inner diameter after twisting. Third, the two-stage twisting method is cumbersome and inefficient. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a flat wire stator twisting fixture that solves the problems of asynchronous twisting, poor consistency, and low efficiency of existing flat wire stators by simultaneously twisting four layers of flat wire in one go.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A flat wire stator twisting fixture is provided, comprising: The base, on which a twisting turntable is mounted; The twisting assembly includes a first twisting die fixed to the twisting turntable by an inner pressure ring and a second, third, and fourth twisting die nested sequentially on the first twisting die. The first twisting die is fixedly connected to the third twisting die, and the second twisting die is fixedly connected to the fourth twisting die. The first, second, third, and fourth twisting dies are all annular, and several wire insertion slots are arranged around their top circumference. A torsion arm mechanism for synchronously and in the opposite direction to twist the first, third, second, and fourth twisting dies is provided between the twisting turntable and the fourth twisting die. An outer pressure ring is fixedly connected to the base. The outer pressure ring is sleeved on the fourth torsion mold and limits the first, second, third and fourth torsion molds.

[0005] Furthermore, the bottom of the first and fourth torsion dies are provided with several evenly arranged grooves in the circumferential direction, and the bottom of the second and third torsion dies are provided with several evenly arranged bosses and several evenly arranged clearance grooves in the circumferential direction. The bosses on the second torsion die are located in the circumferential direction of its outer sidewall, and the bosses on the third torsion die are located in the circumferential direction of its inner sidewall. The bosses on the third torsion die pass through the clearance grooves on the second torsion die and then engage with the grooves on the first torsion die. The bosses on the second torsion die pass through the clearance grooves on the third torsion die and then engage with the grooves on the fourth torsion die.

[0006] Furthermore, the torsion arm mechanism includes a first torsion arm and a second torsion arm arranged horizontally. One end of the first torsion arm is fixedly connected to one side of the torsion turntable, and one end of the second torsion arm is fixedly connected to one side of the fourth torsion mold. The other end of the second torsion arm is provided with a mounting seat, and a horizontal screw is threaded onto the mounting seat. The horizontal screw passes through the mounting seat and abuts against one side of the first torsion arm.

[0007] Furthermore, the base is provided with two limiting blocks for limiting the deflection stroke of the first and second torsion arms, respectively.

[0008] Furthermore, one side of the outer pressure ring is provided with an opening groove for avoiding the first and second torsion arms.

[0009] Furthermore, a stepped ring is provided on the inner wall of the first twisting die, and an inner pressure ring is provided on the stepped ring. The inner pressure ring, the stepped ring, and the twisting turntable are fixedly connected by bolts.

[0010] Furthermore, an inner retaining ring and an outer retaining ring are respectively provided on the top of the inner pressure ring and the outer pressure ring, and several insertion slots on the first torsion die, the second torsion die, the third torsion die and the fourth torsion die are located in the gap space between the inner retaining ring and the outer retaining ring.

[0011] Furthermore, the outer pressure ring is provided with a positioning ring for positioning the flat wire stator, and the positioning ring is limited and sleeved on the outer retaining ring. The upper end of the positioning ring is provided with a flared opening to facilitate the insertion of the flat wire stator.

[0012] Furthermore, the size and number of insertion slots on the first, second, third, and fourth torsion dies are all the same.

[0013] Furthermore, the flat wire stator twisting fixture also includes a twisting cover, which abuts against the upper end of the flat wire stator through an external clamping device. The twisting cover is provided with several pressure pins for inserting into the gap of the wire coil and fixing the gap.

[0014] The beneficial effects of this invention are as follows: 1. This solution achieves synchronous one-time forming of four layers of flat wire by fixing the first torsion mold and the third torsion mold, and the second torsion mold and the fourth torsion mold to rotate synchronously. The first and second torsion arms drive the overall reverse torsion, thereby completely eliminating the problems of inter-line angle misalignment, inter-line height difference and inter-line radial extrusion caused by layered torsion. It significantly improves the consistency of the torsion angle between each layer of wire and the flatness of the end face, and also improves the torsion efficiency.

[0015] 2. The first, second, third, and fourth torsion dies of this scheme are nested layer by layer, and the staggered connection of the four torsion dies is achieved through the cooperation of several bosses, grooves, and clearance slots. The overall structure of the four torsion dies is compact, the operation is reliable, and there is no interference when they rotate relative to each other, so as to realize the staggered torsion of adjacent flat wire layers in the radial direction of the flat wire stator. At the same time, the four torsion dies are coaxially clearance-fitted, and the dimensional stability of the inner and outer diameters of the stator after twisting is ensured by the bidirectional limiting of the inner and outer retaining rings.

[0016] 3. The torsion arm mechanism of this solution can cause the first and second torsion arms to deflect in opposite directions by rotating the horizontal screw. The first torsion arm drives the first and third torsion dies to rotate, and the second torsion arm drives the second and fourth torsion dies to rotate. At the same time, the rotation angle of the first and second torsion arms is precisely controlled by the mechanical limiting method of the limiting block, thereby ensuring the consistency and repeatability of the final torsion angle of the four layers of torsion dies.

[0017] 4. In this solution, when twisting the flat wire stator, the pressure pin on the twisting cap can be inserted into the gap of the wire sheath and fix the position between the wires to prevent wire deformation. The external clamping device can press the upper end face of the flat wire stator through the twisting cap, which effectively prevents the flat wire from being pushed out or deformed during the twisting process, and ensures that the twisted end is neat and has a consistent height.

[0018] 5. This solution enables the quick and accurate installation of the flat wire stator through the positioning ring, while effectively preventing the flat wire stator from shifting during the twisting process. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The above and other objects, features, and advantages of the present invention will become clearer through the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not intentionally drawn to scale to actual dimensions; the focus is on illustrating the main points of the invention.

[0020] Figure 1This is a schematic diagram of the structure of a flat wire stator twisting fixture.

[0021] Figure 2 This is an exploded view of the base and the twisted turntable in conjunction.

[0022] Figure 3 This is a schematic diagram of the structure of the twisting turntable and the first twisting die.

[0023] Figure 4 Exploded views of the first torsion mold, the second torsion mold, the third torsion mold, and the fourth torsion mold.

[0024] Figure 5 This is a schematic diagram of the torsion arm mechanism after it has been twisted.

[0025] Figure 6 This is a schematic diagram of the twisted wire cap structure.

[0026] Among them, 1. base, 11. circular hole, 2. twisting turntable, 21. circular boss, 3. twisting assembly, 31. first twisting mold, 32. second twisting mold, 33. third twisting mold, 34. fourth twisting mold, 35. insertion groove, 36. groove, 37. boss, 38. clearance groove, 4. torsion arm mechanism, 41. first torsion arm, 42. second torsion arm, 43. mounting base, 44. horizontal screw, 45. limiting block, 5. inner pressure ring, 51. inner retaining ring, 6. outer pressure ring, 61. opening groove, 62. outer retaining ring, 7. stepped ring, 8. positioning ring, 81. flared opening, 9. twisting cover, 91. pressure needle, 10. flat wire stator. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0031] like Figures 1 to 6 As shown, the flat wire stator twisting fixture of this solution includes a base 1 and a twisting assembly 3. A twisting turntable 2 is provided on the base 1. Specifically, a circular hole 11 is provided in the middle of the base 1, and a circular boss 21 that mates with the circular hole 11 is provided at the bottom of the twisting turntable 2 so that the twisting turntable 2 can rotate on the base 1.

[0032] The twisting assembly 3 includes a first twisting mold 31 fixed to the twisting turntable 2 by an inner pressure ring 5, and a second twisting mold 32, a third twisting mold 33, and a fourth twisting mold 34 nested sequentially on the first twisting mold 31. Specifically, a stepped ring 7 is provided on the inner side wall of the first twisting mold 31, the inner pressure ring 5 is provided on the stepped ring 7, and the inner pressure ring 5, the stepped ring 7, and the twisting turntable 2 are fixedly connected by bolts, so that the first twisting mold 31 and the twisting turntable 2 are coaxially arranged.

[0033] The first twisting die 31, the second twisting die 32, the third twisting die 33, and the fourth twisting die 34 are all annular and nested layer by layer, so that the four twisting dies are coaxially and with clearance fit. An outer pressure ring 6 is fixedly connected to the base 1. The outer pressure ring 6 is sleeved on the fourth twisting die 34 and provides axial and radial limit for the first twisting die 31, the second twisting die 32, the third twisting die 33, and the fourth twisting die 34. Several insertion slots 35 are arranged in the circumferential direction on the top of the first twisting die 31, the second twisting die 32, the third twisting die 33, and the fourth twisting die 34 for the insertion and twisting of flat wires. The size and number of insertion slots 35 on the first twisting die 31, the second twisting die 32, the third twisting die 33, and the fourth twisting die 34 are all the same.

[0034] The first torsion mold 31 is fixedly connected to the third torsion mold 33, and the second torsion mold 32 is fixedly connected to the fourth torsion mold 34. Specifically, the bottom of the first torsion mold 31 and the fourth torsion mold 34 are provided with four evenly arranged grooves 36 in the circumferential direction. The bottom of the second torsion mold 32 and the third torsion mold 33 are provided with four evenly arranged bosses 37 and four evenly arranged clearance grooves 38 in the circumferential direction. The four bosses 37 on the second torsion mold 32 are located in the circumferential direction of its outer side wall, and the four bosses 37 on the third torsion mold 33 are located in the circumferential direction of its inner side wall. The four bosses 37 on the third torsion mold 33 pass through the four clearance grooves 38 on the second torsion mold 32 and then engage with the four grooves 36 on the first torsion mold 31. The four bosses 37 on the second torsion mold 32 pass through the four clearance grooves 38 on the third torsion mold 33 and then engage with the four grooves 36 on the fourth torsion mold 34.

[0035] This solution achieves staggered connection of four layers of torsion mold through the cooperation of several bosses 37, grooves 36 and clearance grooves 38. The overall structure of the four layers of torsion mold is compact, the operation is reliable, and there is no interference when they rotate relative to each other, so as to facilitate the staggered torsion of adjacent flat wire layers in the radial direction of the flat wire stator 10.

[0036] A torsion arm mechanism 4 is provided between the twisting turntable 2 and the fourth twisting die 34 for synchronously and in reverse twisting the first twisting die 31, the third twisting die 33, the second twisting die 32, and the fourth twisting die 34. Specifically, the torsion arm mechanism 4 includes a first torsion arm 41 and a second torsion arm 42 arranged horizontally. One end of the first torsion arm 41 is fixedly connected to one side of the twisting turntable 2, and one end of the second torsion arm 42 is fixedly connected to one side of the fourth twisting die 34.

[0037] This solution achieves synchronous one-time forming of four layers of flat wire by fixing the first twisting mold 31 and the third twisting mold 33, and the second twisting mold 32 and the fourth twisting mold 34 respectively, so that they can rotate synchronously. The first twisting arm 41 and the second twisting arm 42 drive the overall reverse twisting, thereby achieving synchronous one-time forming of four layers of flat wire. It also completely eliminates the problems of wire angle misalignment, wire height difference and wire radial extrusion caused by layered twisting, significantly improves the consistency of twist angle between each layer of wire and the flatness of the end face, and also improves twisting efficiency.

[0038] The other end of the second torsion arm 42 is provided with a mounting base 43, and a horizontal screw 44 is threaded onto the mounting base 43. The horizontal screw 44 passes through the mounting base 43 and abuts against one side of the first torsion arm 41. The base 1 is provided with two limiting blocks 45 for limiting the deflection stroke of the first torsion arm 41 and the second torsion arm 42 respectively. One side of the outer pressure ring 6 is provided with an opening groove 61 for avoiding the first torsion arm 41 and the second torsion arm 42.

[0039] In this design, the torsion arm mechanism 4 rotates the horizontal screw 44, causing the first torsion arm 41 and the second torsion arm 42 to deflect in opposite directions. The first torsion arm 41 drives the first torsion mold 31 and the third torsion mold 33 to rotate counterclockwise, while the second torsion arm 42 drives the second torsion mold 32 and the fourth torsion mold 34 to rotate clockwise. At the same time, the rotation angle of the first torsion arm 41 and the second torsion arm 42 is precisely controlled by the mechanical limiting method of the limiting block 45, thereby ensuring the consistency and repeatability of the final torsion angle of the four layers of torsion molds.

[0040] The inner pressure ring 5 and the outer pressure ring 6 are respectively provided with an inner retaining ring 51 and an outer retaining ring 62 at their tops. Several wire insertion slots 35 on the first twisting die 31, the second twisting die 32, the third twisting die 33 and the fourth twisting die 34 are located in the gap space between the inner retaining ring 51 and the outer retaining ring 62. The four layers of twisting dies in this scheme are coaxially spaced and, under the bidirectional limiting of the inner retaining ring 51 and the outer retaining ring 62, the dimensional stability of the inner and outer diameters of the stator after twisting is ensured.

[0041] The outer pressure ring 6 is provided with a positioning ring 8 for positioning the flat wire stator 10, and the positioning ring 8 is limited and sleeved on the outer retaining ring 62. The upper end of the positioning ring 8 is provided with a flared opening 81 to facilitate the insertion of the flat wire stator 10, so as to realize the quick and accurate insertion of the flat wire stator 10, and at the same time effectively prevent the flat wire stator 10 from shifting during the twisting process.

[0042] The flat wire stator twisting fixture of this solution also includes a twisting cover 9, which is provided with several pressure pins 91. When twisting the flat wire stator 10, the flat wire stator 10 is vertically inserted into the positioning ring 8 from top to bottom, and several flat wires at its lower end are inserted into several insertion slots 35. The external clamping device can press the upper end face of the flat wire stator 10 through the twisting cover 9, which effectively prevents the flat wires from being pushed out or deformed during the twisting process, and ensures that the twisted end is neat and has a consistent height. In addition, the pressure pins 91 on the twisting cover 9 can be inserted into the gap of the wire sheath and fix the position between the wires to prevent the wires from deforming.

[0043] In summary, this solution achieves overall wire twisting through a single assembly of the flat wire stator 10, avoiding errors caused by multiple twisting operations. Furthermore, the twisting operation is convenient, efficient, and ensures strong consistency in twisting angle and height.

[0044] Although the specific embodiments of the invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent; various modifications and variations that can be made by a person skilled in the art without inventive effort within the scope described in the claims are still within the scope of protection of this patent.

Claims

1. A flat wire stator twisting fixture, characterized in that, include: The base, on which a twisting turntable is installed; The twisting assembly includes a first twisting die fixed to the twisting turntable by an inner pressure ring, and a second, third, and fourth twisting dies nested sequentially on the first twisting die. The first and third twisting dies are fixedly connected, and the second and fourth twisting dies are fixedly connected. The first, second, third, and fourth twisting dies are all annular, and several wire insertion slots are arranged circumferentially on their tops. A torsion arm mechanism for synchronously and in the opposite direction to twist the first, third, second, and fourth twisting dies is provided between the twisting turntable and the fourth twisting die. An outer pressure ring is fixedly connected to the base. The outer pressure ring is sleeved on the fourth torsion mold and provides axial and radial limits for the first, second, third, and fourth torsion molds.

2. The flat wire stator twisting fixture according to claim 1, characterized in that, Both the first and fourth twisting dies have several evenly arranged grooves on their bottom circumferential surfaces. Both the second and third twisting dies have several evenly arranged bosses and several evenly arranged clearance grooves on their bottom circumferential surfaces. The bosses on the second twisting die are located on the circumferential surface of its outer sidewall, and the bosses on the third twisting die are located on the circumferential surface of its inner sidewall. The bosses on the third twisting die pass through the clearance grooves on the second twisting die and then engage with the grooves on the first twisting die. The bosses on the second twisting die pass through the clearance grooves on the third twisting die and then engage with the grooves on the fourth twisting die.

3. The flat wire stator twisting fixture according to claim 1, characterized in that, The torsion arm mechanism includes a first torsion arm and a second torsion arm arranged horizontally. One end of the first torsion arm is fixedly connected to one side of the twisting turntable, and one end of the second torsion arm is fixedly connected to one side of the fourth torsion mold. The other end of the second torsion arm is provided with a mounting base. A horizontal screw is threaded onto the mounting base, and the horizontal screw passes through the mounting base and abuts against one side of the first torsion arm.

4. The flat wire stator twisting fixture according to claim 3, characterized in that, The base is provided with two limiting blocks for limiting the deflection stroke of the first torsion arm and the second torsion arm, respectively.

5. The flat wire stator twisting fixture according to claim 3, characterized in that, One side of the outer pressure ring is provided with an opening groove for avoiding the first torsion arm and the second torsion arm.

6. The flat wire stator twisting fixture according to claim 1, characterized in that, A stepped ring is provided on the inner side wall of the first twisting die, and the inner pressure ring is provided on the stepped ring. The inner pressure ring, the stepped ring and the twisting turntable are fixedly connected by bolts.

7. The flat wire stator twisting fixture according to claim 6, characterized in that, The top of the inner pressure ring and the outer pressure ring are respectively provided with an inner retaining ring and an outer retaining ring, and a plurality of wire insertion slots on the first torsion mold, the second torsion mold, the third torsion mold and the fourth torsion mold are located in the gap space between the inner retaining ring and the outer retaining ring.

8. The flat wire stator twisting fixture according to claim 7, characterized in that, The outer pressure ring is provided with a positioning ring for positioning the flat wire stator, and the positioning ring is limited and sleeved on the outer retaining ring. The upper end of the positioning ring is provided with an flared opening to facilitate the insertion of the flat wire stator.

9. The flat wire stator twisting fixture according to claim 1, characterized in that, The size and number of insertion slots on the first, second, third, and fourth torsion molds are all the same.

10. The flat wire stator twisting fixture according to claim 1, characterized in that, It also includes a twisted wire cap, which abuts against the upper end of the flat wire stator through an external clamping device. The twisted wire cap is provided with several pressure pins for inserting into the gap of the wire coil and fixing the gap.

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