Head twisting die and head twisting machine

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a head twisting die and a head twisting machine. The head twisting die comprises a positioning sleeve with a positioning cavity and a wire twisting unit rotationally arranged in the positioning cavity, a plurality of wire twisting holes are formed in the wire twisting unit at intervals in the circumferential direction of the wire twisting unit, and a plurality of head twisting ends of the flat wire winding are inserted into the wire twisting holes respectively; a plurality of blowing holes are formed in the side surface of the positioning sleeve in the circumferential direction of the positioning sleeve in sequence, and the blowing holes communicate with the wire twisting holes correspondingly. According to the utility model, chippings in the wire twisting hole can be taken away through gas, so that a clean environment is kept in the wire twisting hole, the chippings are prevented from damaging the twisting head end and the twisting head die, the reliability of the twisting head die is improved, and the service life of the twisting head die is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, in particular to a twisting die and a twisting machine. Background Art

[0002] At present, flat wire motors are needed in new energy vehicles. Since flat wires have high rigidity, they need to be pre-processed into multiple sections of wires with specific shapes. These wires are then inserted into the stator slots of the motor. At one end of the stator slot (i.e., the welding end of the stator), the end of the flat wire in each slot coated with enameled wire needs to be twisted. This twisting process is completed in a twisting die to form welding wire ends (i.e., wire rows) arranged from the inside to the outside. Then, two adjacent wire ends in the wire row are welded to form a welding point, and finally a complete closed winding is completed.

[0003] However, after the twisting mold has been used many times, debris will fall into the twisting mold at the torsional deformation end of the flat wire. The next time the flat wire is inserted into the twisting mold, the debris will block the insertion of the flat wire. The debris will also press on the surface of the flat wire during the twisting deformation process, thereby damaging the insulating paint layer on the surface of the flat wire and the inner wall of the twisting mold, thereby reducing the reliability of the torsional deformation of the twisting mold and shortening the service life of the twisting mold. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a twist head mold, aiming to solve the problem of how to improve the reliability and service life of the twist head mold.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In a first aspect, a twisting mold is provided for twisting and deforming a flat wire winding, the twisting mold comprising: a positioning sleeve having a positioning cavity and a twisting unit rotatably arranged in the positioning cavity, the twisting unit being provided with a twisting hole, a plurality of the twisting holes being arranged at intervals along the circumference of the twisting unit, and a plurality of twisting ends of the flat wire winding being respectively inserted into each of the twisting holes; a side surface of the positioning sleeve being provided with a blowing hole, a plurality of the blowing holes being arranged in sequence along the circumference of the positioning sleeve, and each of the blowing holes being respectively connected to each of the twisting holes.

[0007] In some embodiments, the wire twisting unit is provided with an air inlet hole, and a plurality of the air inlet holes are arranged at intervals along the circumference of the wire twisting unit, each of the air inlet holes is respectively connected to each of the wire twisting holes, and each of the air blowing holes is respectively connected to each of the air inlet holes.

[0008] In some embodiments, the wire twisting unit includes an outer wire sleeve that is rotatably arranged and an inner wire sleeve that is located inside the outer wire sleeve and is rotatably arranged, the wire twisting hole is partially located in the outer wire sleeve and forms an outer wire groove, and the other part of the wire twisting hole is located in the inner wire sleeve and forms an inner wire groove, both ends of the air inlet hole extend to the inner wire sleeve and the outer wire sleeve respectively, and the inner wire groove and the outer wire groove are both connected to the air inlet hole.

[0009] In some embodiments, a first chip removal hole is further provided on the outer wire sleeve, the air inlet hole is located between the first chip removal hole and the outer wire groove, and the first chip removal hole is connected to the air inlet hole, and / or a second chip removal hole is further provided on the inner wire sleeve, the air inlet hole is located between the second chip removal hole and the inner wire groove, and the second chip removal hole is connected to the air inlet hole.

[0010] In some embodiments, any two adjacent outer wire grooves are separated on the outer wire sleeve to form a spacing portion, and an avoidance groove is provided on the spacing portion.

[0011] In some embodiments, the edges of the groove walls on both sides of the outer wire groove are rounded.

[0012] In some embodiments, the edges of the groove walls on both sides of the inner groove are rounded.

[0013] In some embodiments, the twist head mold further includes a positioning ring, which is connected to the positioning sleeve and arranged along the circumference of the positioning sleeve.

[0014] In a second aspect, a head twisting machine is provided, which includes the head twisting mold. The head twisting machine also includes a driving mechanism, and the driving mechanism is used to drive the wire twisting unit to rotate relative to the positioning sleeve.

[0015] The beneficial effect of the present application is that after the twisting die has performed multiple twisting operations, debris that falls off after the flat wire is bent and deformed will remain in the twisting hole. Each blowing hole is connected to an air source, and the air source can fill each blowing hole with high-pressure gas. The gas can be air, and the gas can take away the debris in the twisting hole, so that the twisting hole maintains a clean environment, avoiding debris from damaging the twisting head end and the twisting die, and improving the reliability and service life of the twisting die. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1It is a structural schematic diagram of the twist head mold provided in an embodiment of the present application;

[0018] Figure 2 yes Figure 1 A local enlarged view of point A;

[0019] Figure 3 yes Figure 1 A cross-sectional diagram of a twisting die and a flat wire winding;

[0020] Figure 4 yes Figure 3 A local enlarged view of point B;

[0021] Figure 5 yes Figure 1 Schematic diagram of the three-dimensional structure of the outer sleeve.

[0022] Among them, the reference numerals in the figure are:

[0023] 100, twisting head mold; 101, positioning sleeve; 102, positioning ring; 103, blowing hole; 200, twisting unit; 203, twisting hole; 2011, outer wire groove; 2021, inner wire groove; 201, outer wire sleeve; 202, inner wire sleeve; 110, flat wire winding; 111, twisting head end; 2012, avoidance groove; 204, air inlet hole; 2013, first chip row hole; 2022, second chip row hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] See also Figures 1 to 3The embodiment of the present application provides a twisting mold 100 for twisting and deforming a flat wire winding 110, wherein the flat wire winding 110 is applied to the motor of a new energy vehicle, and the flat wire winding 110 includes multiple layers of flat wires arranged from the outside to the inside, each flat wire layer includes multiple plug-in flat wires, the cross-sectional shape of the flat wire is a polygon, and the flat wire has two twisting ends 111, and the twisting mold 100 is used to twist the twisting end 111 to twist the twisting end 111 to facilitate subsequent welding.

[0027] See also Figures 2 to 4 The twisting mold 100 includes: a positioning sleeve 101 with a positioning cavity and a twisting unit 200 rotatably arranged in the positioning cavity, and the positioning sleeve 101 is used to fix and install the twisting unit 200. The twisting unit 200 is provided with a twisting hole 203, and a plurality of twisting holes 203 are arranged at intervals along the circumference of the twisting unit 200, and a plurality of twisting ends 111 of the flat wire winding 110 are respectively inserted into each twisting hole 203. It can be understood that each twisting end 111 of a flat wire layer can be inserted into the twisting hole 203, or each twisting end 111 of two adjacent flat wire layers can be respectively inserted into each twisting hole 203. In this embodiment, two twisting ends 111 are inserted into one twisting hole 203, and the two twisting ends 111 are respectively located on two adjacent flat wire layers. In other embodiments, it can be selected according to actual conditions, and there is no limitation here.

[0028] See also Figures 2 to 4 The side surface of the positioning sleeve 101 is provided with a blowing hole 103, and a plurality of blowing holes 103 are sequentially arranged along the circumference of the positioning sleeve 101, and each blowing hole 103 is connected to each twisting hole 203. It can be understood that after the twisting mold 100 performs multiple twisting operations, debris that falls after the flat wire is bent and deformed will remain in the twisting hole 203. Each blowing hole 103 is connected to an air source, and the air source can fill each blowing hole 103 with high-pressure gas. The gas can be air, and the gas can take away the debris in the twisting hole 203, so that the twisting hole 203 maintains a clean environment, avoids the debris from damaging the twisting end 111 and the twisting mold 100, and improves the reliability and service life of the twisting mold 100.

[0029] Optionally, the air source can be a compressed air machine, which has the advantages of being easy to obtain and low in cost. The air is compressed and stored in an air tank using an air compressor, and then transported to each blowing hole 103 through a pipeline, so that the hole wall of each twisting hole 203 can be kept in a clean environment.

[0030] See also Figures 2 to 4Optionally, the depth direction of the twisting hole 203 is arranged along the vertical direction, and the blowing hole 103 is located at the lower end of the positioning sleeve 101. When the twisting head end 111 is not inserted into the twisting hole 203, compressed gas is filled into each twisting hole 203 through the air source, so that the debris is blown out from the upper end hole of the twisting hole 203.

[0031] See also Figures 2 to 4 In some embodiments, the wire twisting unit 200 is provided with an air inlet hole 204 , and a plurality of air inlet holes 204 are arranged at intervals along the circumference of the wire twisting unit 200 , each air inlet hole 204 is respectively connected to each wire twisting hole 203 , and each air blowing hole 103 is respectively connected to each air inlet hole 204 .

[0032] See also Figures 2 to 4 Optionally, the air inlet holes 204 are arranged at intervals along the circumference of the wire twisting unit 200, and each air inlet hole 204 is respectively connected to each wire twisting hole 203, and is respectively connected to each air blowing hole 103. The air inlet holes 204 are located at the lower end of the wire twisting unit 200, and are adjacent to and connected to the corresponding air blowing holes 103, so that the debris in the wire twisting hole 203 can be removed by airflow during the processing.

[0033] See also Figures 2 to 4 In some embodiments, a plurality of twisting units 200 are arranged, and each twisting unit 200 is sequentially arranged from the outside to the inside along the radial direction of the positioning sleeve 101, and each twisting hole 203 on any twisting unit 200 is connected to each blowing hole 103 respectively.

[0034] See also Figures 2 to 4 It is understandable that two, three or more twisting units 200 can be provided, and there is no limitation here, and it can be selected according to the actual situation. In this embodiment, three twisting units 200 are provided, and six adjacent flat wire layers on the flat wire winding 110 are grouped in pairs, and each group is inserted into the same twisting unit 200. By driving each twisting unit 200 to rotate in the same direction or in opposite directions, the twisting deformation of each twisting head end 111 is achieved.

[0035] See also Figures 2 to 4 In some embodiments, the wire twisting unit 200 includes an outer wire sleeve 201 that is rotatably arranged and an inner wire sleeve 202 that is located inside the outer wire sleeve 201 and is rotatably arranged. A portion of the wire twisting hole 203 is located in the outer wire sleeve 201 and forms an outer wire groove 2011. Another portion of the wire twisting hole 203 is located in the inner wire sleeve 202 and forms an inner wire groove 2021. Both ends of the air inlet hole 204 extend to the inner wire sleeve 202 and the outer wire sleeve 201, respectively, and the inner wire groove 2021 and the outer wire groove 2011 are both connected to the air inlet hole 204.

[0036] See also Figures 2 to 4Optionally, each outer wire groove 2011 is inserted with a twist end 111 located on the same flat wire layer, and each inner wire groove 2021 is also inserted with a twist end 111 located on the same flat wire layer. The twist end 111 in the outer wire groove 2011 and the twist end 111 in the corresponding inner wire groove 2021 are respectively located in two adjacent flat wire layers.

[0037] It is understandable that by driving the outer wire sleeve 201 and the inner wire sleeve 202 to rotate relative to each other, the outer wire groove 2011 can drive the twisting head end 111 therein to undergo twisting deformation, and at the same time, the corresponding inner wire groove 2021 can drive the twisting head end 111 therein to undergo twisting deformation.

[0038] See also Figures 2 to 4 Optionally, in the same twisting unit 200, the inner sleeve 202 rotates clockwise and the outer sleeve 201 rotates counterclockwise, or the outer sleeve 201 rotates clockwise and the inner sleeve 202 rotates counterclockwise. This can be selected according to actual conditions and is not limited here.

[0039] See also Figures 2 to 4 In some embodiments, a first chip removal hole 2013 is further provided on the outer wire sleeve 201 , and the air inlet hole 204 is located between the first chip removal hole 2013 and the outer wire groove 2011 , and the first chip removal hole 2013 is connected to the air inlet hole 204 .

[0040] See also Figures 2 to 4 It can be understood that debris will be generated during the torsional deformation of the twisting head end 111 in the outer wire groove 2011. The first chip removal hole 2013 is located below the outer wire groove 2011 and is connected through a through hole, so that the debris generated during the torsional deformation can directly fall into the first chip removal hole 2013, and then fall out of the chip removal hole at the lower end through the high-pressure gas delivered by the blowing hole 103. In other words, part of the debris leaves the twisting hole 203 from the upper end of the twisting unit 200, and part of the debris leaves the first chip removal hole 2013 from the lower end of the twisting unit 200, thereby further optimizing the airflow clearing effect and improving reliability.

[0041] See also Figures 2 to 4 Optionally, a second chip removal hole 2022 is further provided on the inner wire sleeve 202 , the air inlet hole 204 is located between the second chip removal hole 2022 and the inner wire groove 2021 , and the second chip removal hole 2022 is connected to the air inlet hole 204 .

[0042] See also Figures 2 to 4, debris will be generated during the torsional deformation of the twist head end 111 in the inner wire groove 2021. The second chip removal hole 2022 is located below the inner wire groove 2021 and is connected through a through hole, so that the debris generated during the torsional deformation process can directly fall into the second chip removal hole 2022, and then fall out of the chip removal hole at the lower end through the high-pressure gas delivered by the blowing hole 103. In other words, part of the debris leaves the twisting hole 203 from the upper end of the twisting unit 200, and part of the debris leaves the second chip removal hole 2022 from the lower end of the twisting unit 200, thereby further optimizing the airflow clearing effect and improving reliability.

[0043] In some embodiments, any two adjacent outer wire grooves 2011 are separated on the outer wire sleeve 201 to form a partition, and an avoidance groove 2012 is provided on the partition.

[0044] See also Figures 3 to 5 It can be understood that when the outer sleeve 201 and the inner sleeve 202 rotate relative to each other, due to the previous expanding process, the twisting head end 111 in the inner sleeve 202 has a tendency to tilt toward the outer sleeve 201, and the avoidance groove 2012 is provided on the spacing portion of the outer sleeve 201, so that the twisting head end 111 in the inner sleeve 2021 can tilt outward and be partially accommodated in the avoidance groove 2012 during the torsional deformation process, thereby avoiding the twisting head end 111 from scratching the inner wall of the outer sleeve 201, thereby improving the convenience of use and the service life of the twisting head mold 100.

[0045] See also Figures 3 to 5 In some embodiments, the edges of the groove walls on both sides of the outer groove 2011 are rounded. The rounded corners make the edges of the outer groove 2011 smoother, reduce possible sharp corners, and thus improve the safety of use.

[0046] In addition, this rounded corner design also enhances the durability of the outer wire trough 2011. During long-term use, due to the dispersion of impact force by the rounded corners, the groove walls on both sides of the outer wire trough 2011 are less likely to be damaged or deformed, and the twisting head end 111 is easier to pass through the rounded corners without bumping or scratching, which undoubtedly extends the service life of the outer wire trough 2011 and reduces the maintenance cost of the user.

[0047] See also Figures 3 to 5 In some embodiments, the edges of the groove walls on both sides of the inner groove 2021 are rounded. The rounded corners make the edges of the groove walls on both sides of the inner groove 2021 smoother, reduce the sharp corners that may be generated, and thus improve the safety of use.

[0048] See also Figures 3 to 5In addition, this rounded corner design also enhances the durability of the inner wire groove 2021. During long-term use, due to the dispersion of impact force by the rounded corners, the groove walls on both sides of the inner wire groove 2021 are less likely to be damaged or deformed. When the twisting head end 111 rotates through the rounded corner, it is easier to pass without bumps and scratches, which undoubtedly extends the service life of the inner wire groove 2021 and reduces the user's maintenance cost.

[0049] In some embodiments, the twist head mold 100 further includes a positioning ring 102, which is connected to the positioning sleeve 101 and arranged along the circumference of the positioning sleeve 101. The positioning ring 102 is used to fix the positioning sleeve 101 to other structural parts. The provision of the positioning ring 102 enables the twist head mold 100 to maintain a stable position during assembly and use, and prevents displacement or loosening due to vibration or external force. Through the connection between the positioning ring 102 and the positioning sleeve 101, the twist head mold 100 can be firmly fixed to the corresponding structural part to ensure its stability and reliability.

[0050] See also Figures 1 to 3 The design of the positioning ring 102 can be adjusted according to actual needs to adapt to different assembly environments and fixing requirements. For example, the positioning ring 102 can be connected by thread, snap or other forms of connection that match the positioning sleeve 101 to ensure the firmness and reliability of the connection. At the same time, the material and size of the positioning ring 102 can also be selected according to needs to meet specific usage requirements.

[0051] See also Figures 3 to 5 The twisting die 100 of this embodiment solves the problem of debris damaging the flat wire and the twisting die 100 through the airflow cleaning system, the optimized inner and outer wire sleeves 201 design and the stable positioning ring 102, improves the reliability of torsional deformation and the service life of the die. It ensures the stability and uniformity of the flat wire winding 110 during the processing and has a wide range of application prospects.

[0052] The utility model also proposes a head twisting machine, which includes a head twisting mold 100. The specific structure of the head twisting mold 100 refers to the above embodiment. Since the head twisting machine adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0053] In some embodiments, the wire twisting machine further includes a driving mechanism, and the driving mechanism is used to drive each wire twisting unit 200 to rotate relative to the positioning sleeve 101.

[0054] In some embodiments, the driving mechanism includes a driving motor and a transmission assembly, and the driving motor drives the twisting unit 200 to rotate relative to the positioning sleeve 101 through the transmission assembly. Optionally, the transmission assembly may include gears, racks, worm gears, chains, etc. to achieve power transmission between the twisting unit 200 and the driving motor, which is not limited here. In this embodiment, the transmission assembly includes a plurality of turntables, each of which is used to drive and connect each outer sleeve 201 and each sleeve, and each turntable is driven by a plurality of driving motors, so as to achieve independent rotation of any outer sleeve 201 or any inner sleeve 202.

[0055] See also Figures 1 to 3 The twisting die 100 realizes batch twisting of the twisting ends 111 of the flat wire winding 110 by setting a plurality of twisting holes 203 and blowing holes 103, thereby improving production efficiency and product quality. At the same time, by controlling the relative rotation of the twisting unit 200 and using the detection mechanism, the consistency of the twisting angles of each twisting end 111 is ensured, thereby improving the reliability and consistency of the product. The use of the twisting machine further improves production efficiency and automation, and reduces labor costs and operating difficulties.

[0056] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A twisting die for twisting a flat wire winding, characterized in that: The twisting head mold includes: a positioning sleeve with a positioning cavity and a twisting wire unit rotatably arranged in the positioning cavity, the twisting wire unit is provided with a twisting wire hole, a plurality of the twisting wire holes are arranged at intervals along the circumference of the twisting wire unit, and a plurality of twisting head ends of the flat wire winding are respectively inserted into each of the twisting wire holes; the side surface of the positioning sleeve is provided with a blowing hole, a plurality of the blowing holes are arranged in sequence along the circumference of the positioning sleeve, and each of the blowing holes is respectively connected to each of the twisting wire holes.

2. The twisting die according to claim 1, characterized in that: There are multiple wire twisting units arranged, and each of the wire twisting units is sequentially sleeved from the outside to the inside along the radial direction of the positioning sleeve, and each of the wire twisting holes on any of the wire twisting units is respectively connected to each of the blowing holes.

3. The twisting die according to claim 1, characterized in that: The wire twisting unit is provided with an air inlet hole, and a plurality of the air inlet holes are arranged at intervals along the circumference of the wire twisting unit, each of the air inlet holes is respectively connected to each of the wire twisting holes, and each of the air blowing holes is respectively connected to each of the air inlet holes.

4. The twisting die according to claim 3, characterized in that: The wire twisting unit includes an outer wire sleeve that is rotatably arranged and an inner wire sleeve that is located inside the outer wire sleeve and is rotatably arranged. Part of the wire twisting hole is located in the outer wire sleeve and forms an outer wire groove. Another part of the wire twisting hole is located in the inner wire sleeve and forms an inner wire groove. Both ends of the air inlet hole extend to the inner wire sleeve and the outer wire sleeve respectively, and the inner wire groove and the outer wire groove are both connected to the air inlet hole.

5. The twisting die according to claim 4, characterized in that: The outer wire sleeve is also provided with a first chip removal hole, the air inlet hole is located between the first chip removal hole and the outer wire groove, and the first chip removal hole is connected to the air inlet hole, and / or the inner wire sleeve is also provided with a second chip removal hole, the air inlet hole is located between the second chip removal hole and the inner wire groove, and the second chip removal hole is connected to the air inlet hole.

6. The twisting die according to claim 4, characterized in that: Any two adjacent outer wire grooves are separated on the outer wire sleeve to form a spacing portion, and the spacing portion is provided with an avoidance groove.

7. The twist head mold according to any one of claims 4 to 6, characterized in that: The edges of the groove walls on both sides of the outer wire groove are rounded.

8. The twist head mold according to any one of claims 4 to 6, characterized in that: The edges of the groove walls on both sides of the inner wire groove are rounded.

9. The twisting die according to any one of claims 1 to 6, characterized in that: The twisting head mold also includes a positioning ring, which is connected to the positioning sleeve and arranged along the circumference of the positioning sleeve.

10. A head twisting machine, characterized in that: It comprises a twisting mold as described in any one of claims 1 to 9, and the twisting machine also comprises a driving mechanism, and the driving mechanism is used to drive the wire twisting unit to rotate relative to the positioning sleeve.

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