Coil expanding and shaping device

Abstract

The utility model relates to a coil expanding and shaping device which comprises an expanding assembly, a shaping assembly and an end extrusion assembly, the expanding assembly comprises an expanding driving piece and an expanding block, and the expanding driving piece moves axially to enable the expanding block to move outwards in the radial direction to expand a coil; the shaping assembly comprises a shaping driving piece and a shaping sleeve, the shaping sleeve is arranged on the outer side of the expanding driving piece in a sleeving mode, the expanding block is arranged on the shaping sleeve, and axial movement of the expanding block is limited by the shaping sleeve; the end extrusion assembly comprises an extrusion driving piece and an extrusion sleeve, and the extrusion sleeve conducts extrusion positioning on the expanded coil. The shaping assembly moves to a required position, the coil is pushed out of the stator slot through the expansion assembly to avoid the stator slot without coil insertion, and then the coil pushed away by the expansion assembly is extruded and positioned through the end extrusion assembly, so that coil insertion operation can be conveniently performed on the stator slot without coil insertion subsequently. And each line inserting process can be completed in a short time with high quality, so that the labor cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy motor technology field especially relates to a coil expansion shaping device for motor stator embedded wire. BACKGROUND

[0002] The rapid growth of the new energy vehicle market provides strong impetus for the development of new energy motor technology. Consumer demand for range, performance, comfort, and other aspects continuously drives innovation in motor technology.

[0003] To improve the production efficiency of new energy motors, motor manufacturers use a large number of automated production instead of manual work. In the manufacturing process of new energy motor stators, coil embedding in the stator slot is a crucial step that directly affects the performance and efficiency of the motor. In traditional processes, coil shaping is usually performed on the protruding part of the motor stator after the coil is completely embedded in the stator slot. However, this post-processing method has encountered challenges when facing new energy motor stators, especially when the slot fill factor is as high as 88% or higher.

[0004] Due to the high slot fill factor characteristic of new energy motor stators, different coils need to be embedded in sequence during the embedding process. Once two stator slots are embedded with coils, the coils often protrude from the end of the stator, and the protruding part blocks the adjacent stator slots that have not yet been embedded. This phenomenon not only increases the difficulty of subsequent embedding operations, but also may cause coil misalignment or damage due to blocked operation space, thereby affecting the overall quality and operation effect of the motor. SUMMARY

[0005] To solve the above problems, the utility model provides a coil expansion shaping device.

[0006] The technical scheme adopted by the utility model to solve the above problems is:

[0007] A coil expansion shaping device, comprising,

[0008] An expansion assembly, including an expansion drive member and an expansion block driven by the expansion drive member, the axial movement of the expansion drive member causes the expansion block to move radially outward to expand the coil;

[0009] A shaping assembly, including a shaping drive member and a shaping sleeve driven by the shaping drive member, the shaping sleeve is located outside the expansion drive member, the expansion block is arranged on the shaping sleeve and is limited by the shaping sleeve to move axially;

[0010] An end extrusion assembly, including an extrusion drive member and an extrusion sleeve driven by the extrusion drive member, the extrusion sleeve extrudes and positions the expanded coil.

[0011] Further, the expansion driving part comprises a conical block and an expansion push rod connected to the conical block, the end of the conical block away from the expansion push rod is a conical surface, and the expansion block is provided with an inclined surface which cooperates with the conical surface.

[0012] Further, the expansion block comprises a pushing part and an elastic part fixed to the pushing part, the inclined surface is arranged on the pushing part, and the elastic part contacts the coil.

[0013] Further, a T-shaped slot is arranged on the inclined surface, and a T-shaped protrusion is arranged on the pushing part, the T-shaped protrusion is arranged in the T-shaped slot and can slide in the T-shaped slot.

[0014] Further, the expansion block is at least one, and two elastic parts are arranged on the pushing part of each expansion block.

[0015] Further, a through hole is arranged on the end of the shaping sleeve away from the shaping driving part in the radial direction, and the expansion block can pass through the through hole; the number of the through holes is consistent with the number of the expansion blocks and one-to-one correspondence.

[0016] Further, the shaping sleeve comprises a cylinder and an annular cover plate fixed to the end of the cylinder away from the shaping driving part, and the through hole is composed of a slot on the cylinder and the annular cover plate.

[0017] Further, a second sliding slot is arranged on the side of the annular cover plate close to the cylinder, and a second sliding protrusion is arranged on the side of the expansion block close to the annular cover plate, the second sliding protrusion is inserted into the second sliding slot and can slide in the second sliding slot.

[0018] Further, the extrusion driving part is an extrusion push rod, a connecting group is arranged between the extrusion push rod and the extrusion sleeve, the connecting group comprises a connecting plate connected to the extrusion push rod, a connecting disc fixed to the connecting plate, and the extrusion sleeve fixed to the connecting disc.

[0019] Further, an expansion sliding slot for the expansion block to slide is arranged on the inner wall of the extrusion sleeve, and the expansion sliding slot is arranged in the axial direction of the extrusion sleeve.

[0020] The utility model discloses the beneficial effect is: through shaping assembly movement to the required position, through the expansion component to the outside of stator slot with coil push out to avoid the stator slot that has not carried out embedding wire, reserve the space of sufficient for the embedding wire step of following, then through the end extrusion assembly to the coil that expansion component pushes away extrusion positioning, guarantee that the coil does not reset after end extrusion assembly leaves, to facilitate subsequent embedding wire operation to the stator slot of not embedding wire, entire automation process not only improved production efficiency significantly, makes every embedding wire procedure can be in short time high quality complete, also effectively reduced the artificial cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of motor stator;

[0022] Figure 2 It is the structure schematic diagram of motor stator, coil copper wire assembly after completion;

[0023] Figure 3 It is the structure schematic diagram of the expansion state of the utility model coil expansion shaping device;

[0024] Figure 4 It is the structure schematic diagram of the retraction state of the utility model coil expansion shaping device;

[0025] Figure 5 It is the structure schematic diagram of the utility model coil expansion shaping device Figure 1 ;

[0026] Figure 6 It is the structure schematic diagram of the utility model coil expansion device Figure 2 ;

[0027] Figure 7 It is Figure 6 The sectional structure schematic diagram of A-A direction in it.

[0028] In the drawing: 11, conical block;111, taper surface;12, expansion push rod;13, expansion block;131, push part;1311, inclined surface;1312, positioning protrusion;132, elastic part;21, shaping sleeve;211, barrel;212, through hole;22, shaping push rod;23, annular cover plate;24, shaping connecting plate;31, extrusion sleeve;312, expansion sliding slot;32, extrusion push rod;33, extrusion connecting plate;34, extrusion connecting disc;100, motor stator;110, stator slot;120, through hole;130, stator slot mouth;200, coil. DETAILED DESCRIPTION

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. The direction of movement is also a relative direction of movement and is not limited to an absolute direction of movement. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] This application discloses a coil expansion and shaping device designed for the winding of stator coils in new energy motors. The device is used to push the coil extending from the end of the motor stator to expose the stator slot before winding, so as to facilitate subsequent winding operations.

[0033] In this application, as Figure 1 , Figure 2 As shown, the motor stator 100 is cylindrical with a stator through-hole 120 at its center. Several stator slots 110 are provided on the inner wall of the stator through-hole 120. Here, the direction parallel to the axis of symmetry of the motor stator 100 is defined as the axial direction, and the direction in the same direction as the diameter of the motor stator 100 is defined as the radial direction. The stator slots 110 penetrate the motor stator 100 along the axial direction, and each stator slot 110 has a stator opening 130 on the inner wall of the motor stator 100 in the radial direction.

[0034] like Figure 3- Figure 7 As shown in the drawings, the present application provides a coil 200 expansion device, which is arranged at the end of the motor stator 100 in use, and is used for expanding, shaping and positioning the coil 200 extending from the end of the motor stator 100. The coil 200 expansion device comprises an expansion assembly, a shaping assembly and an end extrusion assembly; the shaping assembly is arranged outside the expansion assembly and can be used for supporting and limiting the movement of the expansion assembly; the end extrusion assembly is arranged outside the shaping assembly and can cooperate with the expansion assembly to extrude and position the coil 200 after the expansion of the coil 200.

[0035] The expansion assembly comprises an expansion driving member and an expansion block 13 driven by the expansion driving member; the axial movement of the expansion driving member causes the radial outward movement of the expansion block 13 to contact and expand the coil 200.

[0036] The shaping assembly comprises a shaping driving member and a shaping sleeve 21 driven by the shaping driving member; the shaping sleeve 21 is arranged outside the expansion driving member, and the expansion block 13 is arranged on the shaping sleeve 21 and is limited in axial movement by the shaping sleeve 21; in this case, the movement characteristics of the expansion block 13 relative to the shaping sleeve 21 are as follows: in the axial direction, the shaping sleeve 21 and the expansion block 13 remain in a relatively static state; this means that the expansion block 13 can move axially synchronously with the shaping sleeve 21, but cannot move axially independently.

[0037] The end extrusion assembly comprises an extrusion driving member and an extrusion sleeve 31 driven by the extrusion driving member; the extrusion sleeve 31 is used for extruding and positioning the coil 200 after the expansion of the coil 200 by the expansion assembly; the expansion assembly first pushes the coil 200 outward to expose the stator slot 110 which has not been embedded with the coil, and maintains this state; then, the extrusion sleeve 31 is driven to move so that its end part contacts the coil 200. Then, the extrusion sleeve 31 continues to apply pressure to the electronic stator to position and shape the coil 200.

[0038] As an embodiment of the present application, as shown in the drawings, Figure 7 The expansion driving member comprises a tapered block 11 and an expansion push rod 12 connected to the tapered block 11; the end of the tapered block 11 away from the expansion push rod 12 is provided with a tapered surface 111; the expansion block 13 is correspondingly provided with an inclined surface 1311; the tapered surface 111 cooperates with the inclined surface 1311; the external power source drives the expansion push rod 12 to move the tapered block 11 in the axial direction; during the movement, the tapered surface 111 contacts the inclined surface 1311; due to the limitation of the shaping assembly and the cooperation between the tapered surface 111 and the inclined surface 1311, the axial movement of the tapered block 11 is converted into the outward extension of the expansion block 13 in the radial direction; the axial movement of the tapered block 11 is converted into the radial expansion movement of the expansion block 13.

[0039] The number of expansion blocks 13 is determined based on the number of coils 200 that need to be processed in one winding process, and the number of expansion blocks 13 is at least one. Specifically, if one winding process involves only one set of coils 200 and they are simultaneously embedded in two stator slots 110, then only one expansion block 13 is needed. Correspondingly, if one winding process includes two sets of coils 200 and these two sets of coils 200 are simultaneously embedded in four stator slots 110, then two expansion blocks 13 are needed.

[0040] In this application, there are four expansion blocks 13, and these four expansion blocks 13 are evenly arranged around the axis of the conical block 11. During one winding process, four sets of coils 200 can be operated simultaneously, thus greatly improving work efficiency. These four sets of coils 200 must remain independent of each other during one winding process and cannot overlap to ensure the accuracy and reliability of the winding.

[0041] As one embodiment of this application, such as Figure 7 The expansion block 13 shown includes a pushing part 131 and an elastic part 132 fixed on the pushing part 131. At least one positioning protrusion 1312 extends radially from the pushing part 131 to the elastic part 132. A positioning groove is provided at the corresponding position of the elastic part 132. The positioning protrusion 1312 is inserted into the positioning groove and the pushing part 131 and the elastic part 132 are fixed by screws. An inclined surface 1311 is provided on the pushing part 131. The elastic part 132 contacts the coil 200 and pushes the coil 200. The elastic part 132 is made of rubber material, which ensures that the expansion block 13 can provide sufficient thrust when pushing the coil 200, while protecting the copper wire from damage, thus improving the efficiency and reliability of the winding operation.

[0042] The design of the expansion block 13 takes into account the relationship between the coil 200 and the stator slots 110. At least one elastic part 132 is provided on each pushing part 131. The main function of these elastic parts 132 is to push the coil 200. Specifically, each pushing part 131 corresponds to a group of coils 200, and the number of elastic parts 132 is determined according to the distance spanned by a group of coils 200. When the distance spanned by a group of coils 200 is large, it means that this group of coils 200 blocks more stator slots 110; in order to effectively push the coil 200 out from above these blocked stator slots 110, it is necessary to increase the number of elastic parts 132. In this application, two elastic parts 132 are provided on each pushing part 131 to ensure that the coil 200 is smoothly pushed out, which can better adapt to the needs of different coil 200 arrangements and improve the convenience and accuracy of the winding operation.

[0043] As an embodiment of the present application, a first sliding groove is arranged on the conical surface 111 of the conical block 11, a first sliding protrusion is arranged on the inclined surface 1311 of the pushing part 131, the first sliding protrusion is arranged in and can slide in the first sliding groove; the cooperation of the first sliding groove and the first sliding protrusion improves the position accuracy and controllability of the expansion block 13 when it is pushed out, so that the whole operation process is more stable and reliable; in the present application, the first sliding groove is a T-shaped groove, the first sliding protrusion is a T-shaped protrusion, and the cooperation of the T-shaped groove and the T-shaped protrusion further improves the accuracy, ensures the accuracy of operation, makes the assembly and installation process more smooth, reduces the risk of falling during installation and use, and enhances the overall stability and durability.

[0044] As an embodiment of the present application, as shown in Figure 3 、 Figure 5 、 Figure 7 The shaping drive in the shaping assembly is a shaping push rod 22, the shaping push rod 22 is powered by an external power source, the shaping push rod 22 and the shaping sleeve 21 are fixedly connected through a shaping connecting plate 24, the shaping push rod 22 is connected to the shaping connecting plate 24 through bolts, and the shaping sleeve 21 is also connected to the shaping connecting plate 24 through bolts; as shown in Figure 4 and Figure 7 , a through hole 212 is arranged on the end of the shaping sleeve 21 away from the shaping push rod 22 in the radial direction, the through hole 212 can conveniently pass through the expansion block 13, and the number of the through holes 212 is consistent with and corresponds to the number of the expansion blocks 13. This design ensures the flexibility and accuracy of the shaping assembly, so that the expansion block 13 can smoothly enter the working position and realize accurate control of the pushing-out position of the coil 200.

[0045] As shown in Figure 7 , the shaping sleeve 21 includes a cylinder body 211 and an annular cover plate 23 fixed to one end of the cylinder body 211 away from the shaping push rod 22, a groove is arranged on the end of the cylinder body 211 away from the shaping push rod 22, the groove is designed as an open type near the annular cover plate 23, and the through hole 212 is formed by the combination of the annular cover plate 23 and the groove. This combination not only facilitates the accurate passing of the expansion block 13, but also greatly simplifies the processing and assembly process.

[0046] Further, a second sliding groove is arranged on the side of the annular cover plate 23 close to the cylinder body 211, the second sliding groove corresponds to the expansion hole, a second sliding protrusion is arranged on the side of the expansion block 13 close to the annular cover plate 23, the second sliding protrusion is inserted into the second sliding groove and can slide in the second sliding groove; through the cooperation of the second sliding groove and the second sliding protrusion, the position of the expansion block 13 can be further limited, so that the expansion block 13 is more stable during the expansion of the coil 200, and the accurate control of the position of the expansion block 13 is mainly improved.

[0047] As an embodiment of the present application, as shown in Figure 3 Figure 7 The extrusion driving member in the end extrusion assembly is an extrusion push rod 32, which is powered by an external power source, connected through an extrusion connecting group between the extrusion push rod 32 and the extrusion sleeve 31, and transmits power to the extrusion sleeve 31 through the extrusion connecting group to make the extrusion cylinder body 211 move in the axial direction; wherein the extrusion connecting group includes an extrusion connecting plate 33 connected with the extrusion push rod 32, an extrusion connecting disc 34 fixed on the extrusion connecting plate 33, and the extrusion sleeve 31 fixed on the extrusion connecting disc 34; the extrusion push rod 32, the extrusion connecting plate 33 and the extrusion connecting disc 34 are fixedly connected by bolts, so that the disassembly, installation and subsequent maintenance work become more simple and fast.

[0048] In use, the expansion block 13 pushes the coil 200 outward to be extruded and positioned by the end of the extrusion sleeve 31. The expansion block 13 can only push the coil 200 to the edge of the extrusion sleeve 31, in which case the coil 200 is prone to slip off the extrusion position during extrusion, resulting in low quality, as shown in Figure 4 Therefore, the expansion sliding groove 312 for the expansion block 13 to slide is arranged on the inner wall of the extrusion sleeve 31, which provides a smooth sliding path for the expansion block 13; the end of the expansion block 13 can extend into the expansion sliding groove 312 and push the coil 200 into the middle area of the end of the extrusion sleeve 31, so as to ensure that the extrusion position does not deviate; in use, when the extrusion sleeve 31 moves axially, the elastic part 132 in the expansion block 13 can move in the expansion sliding groove 312 without affecting the movement of the extrusion sleeve 31.

[0049] In summary, by moving the shaping push rod 22, the shaping assembly, the expansion assembly and the end extrusion assembly to the end of the motor stator 100, then pushing the conical block 11 to move axially by the expansion push rod 12, the conical block 11 is cooperated with the inclined surface 1311 of the pushing part 131 through the conical surface 111 to make the axial movement of the conical block 11 become radial movement, the elastic part 132 contacts the coil 200 extending from the end of the motor stator 100 and pushes away the part shielding other stator slots 110, then the extrusion push rod 32 drives the extrusion sleeve 31 to move towards the motor stator 100, the extrusion sleeve 31 contacts the coil 200, at this time the elastic part 132 pushes part of the coil 200 into the middle area of the end of the extrusion sleeve 31, and the extrusion sleeve 31 continues to move to realize the positioning and shaping of the coil 200. Automatic production can be realized, which not only significantly improves the production efficiency, makes each embedding process be completed in a short time with high quality, but also effectively reduces the labor cost. ​

[0050] It should be emphasized that the above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A coil expansion and shaping device, characterized by, The application relates to a coil stretching device. The stretching device comprises a stretching assembly, a shaping assembly and an end extrusion assembly. The stretching assembly comprises a stretching driving element, stretching blocks (13) driven by the stretching driving element, axial movement of the stretching driving element enabling the stretching blocks (13) to move radially outward to stretch the coil (200); The shaping assembly comprises a shaping driving element, a shaping sleeve (21) driven by the shaping driving element, the shaping sleeve (21) being arranged outside the stretching driving element, the stretching blocks (13) being arranged on the shaping sleeve (21) and being limited by the shaping sleeve (21) to move axially; 2. The coil expansion and shaping device of claim 1, wherein, The end extrusion assembly comprises an extrusion driving element, an extrusion sleeve (31) driven by the extrusion driving element, the extrusion sleeve (31) being used to extrude and position the stretched coil (200).

3. The coil expansion and shaping device of claim 2, wherein, The stretching driving element comprises a conical block (11) and a stretching push rod (12) connected to the conical block (11), the end of the conical block (11) away from the stretching push rod (12) being a conical surface (111), and the stretching blocks (13) being provided with inclined surfaces (1311), the inclined surfaces (1311) being matched with the conical surface (111).

4. The coil expansion and shaping device of claim 3, wherein, The stretching blocks (13) comprise push parts (131) and elastic parts (132) fixed on the push parts (131), the inclined surfaces (1311) being arranged on the push parts (131), and the elastic parts (132) being in contact with the coil (200).

5. The coil expansion and shaping device of claim 3, wherein, First sliding grooves (112) are arranged on the inclined surfaces (1311), and first sliding protrusions (1313) are arranged on the push parts (131), the first sliding protrusions (1313) being arranged in and slidable in the first sliding grooves (112).

6. The coil expansion and shaping device of claim 1, wherein, There are at least two stretching blocks (13), and two elastic parts (132) are arranged on the push part (131) of each stretching block (13).

7. The coil expansion and shaping device of claim 6, wherein, Through holes (212) are arranged on the end of the shaping sleeve (21) away from the shaping driving element in the radial direction, and the stretching blocks (13) can pass through the through holes (212); the number of the through holes (212) is consistent with and corresponds to the number of the stretching blocks (13).

8. The coil expansion and shaping device of claim 7, wherein, The shaping sleeve (21) comprises a cylinder body (211) and an annular cover plate (23) fixed on the end of the cylinder body (211) away from the shaping driving element, and the through holes (212) are formed by grooves on the cylinder body (211) and the annular cover plate (23).

9. The coil expansion and shaping device of claim 1, wherein, Second sliding grooves (231) are arranged on the side of the annular cover plate close to the cylinder body (211), and second sliding protrusions (1314) are arranged on the side of the stretching blocks (13) close to the annular cover plate, the second sliding protrusions (1314) being inserted into and slidable in the second sliding grooves (231). The extrusion driving element is an extrusion push rod (32), and the extrusion push rod (32) and the extrusion sleeve (31) are connected through a connecting group, the connecting group comprising a connecting plate connected with the extrusion push rod (32), a connecting disc fixed on the connecting plate and the extrusion sleeve (31) fixed on the connecting disc.

10. The coil expansion and shaping device of claim 1, wherein, The expansion sliding groove (312) is arranged on the inner wall of the extrusion sleeve (31) for sliding of the expansion block (13), and is arranged along the axial direction of the extrusion sleeve (31).

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