Clamping mechanism for winding welding, positioning and fixing device and stator manufacturing method

Abstract

The invention relates to a clamping mechanism for winding welding, a positioning and fixing device and a stator manufacturing method, belongs to the technical field of motor production, and solves the defect that a traditional winding fixing tool cannot be applied to MiNiPin. The clamping mechanism for winding welding comprises a plurality of clamping jaws annularly distributed along a set circumference, the multiple clamping jaws are arranged in parallel and level in the axial direction of the set circumference; a plurality of clamping teeth distributed in the radial direction are arranged on the two circumferential sides of each clamping jaw, and when the clamping mechanism for winding welding is in a clamping state, the clamping teeth, adjacent in the circumferential direction, in any two adjacent clamping jaws are arranged in a staggered mode in the radial direction so that all the clamping teeth on the adjacent sides can define a plurality of clamping windows distributed in the radial direction. Each clamping window is used for containing a welding pair of a winding, the clamping jaws are connected with the driving mechanism, the driving mechanism can drive the adjacent clamping jaws to move in the opposite directions in the radial direction of the set circumference so as to clamp, fix or loosen the welding pair, and the clamping mechanism meets the use requirement of MiNiPin.

Description

Technical Field

[0001] The present invention relates to the technical field of motor production, and specifically relates to a clamping mechanism for winding welding, a positioning and fixing device, and a stator manufacturing method. Background Art

[0002] The statements herein only provide background art related to the present invention and do not necessarily constitute prior art.

[0003] With the market's demand for miniaturization and high power density of motors, the axial height of the stator end winding is expected to be smaller, so there appears a flat wire end structure known in the industry as ultra-short PIN or MiniPin (referring to a winding with an axial height of the welding part not higher than 5 mm). The axial height of the welding part of MiniPin is very small, which poses higher requirements for the welding tooling. The clamping part of the welding tooling is expected to have as small an axial height as possible without occupying the axial space of the winding end. Since the axial height of the welding part of MiniPin is very small, if the clamping part of the welding tooling is large, it will be impossible to clamp the end of MiniPin.

[0004] For example, Patent CN117862795B discloses a winding welding tooling for positioning during the trimming and welding of the end winding of a flat wire motor stator. In the above winding welding tooling, the jaws need to be used in cooperation with the clamping plates, and the jaws and the clamping plates are arranged in layers axially, which will occupy a large axial space. Patent CN220717637U discloses a trimming device for reducing the height of the copper wire at the welding end of the stator. Its jaw module includes a main jaw and a sub-jaw, and the main jaw and the sub-jaw are also arranged in layers axially. Therefore, the technical solutions disclosed in the above two patents cannot be applied to the clamping and fixing of the MinPin flat wire end structure. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a clamping mechanism for winding welding, a positioning and fixing device, and a stator manufacturing method, which are applicable to the clamping and fixing during the welding of the MinPin flat wire end structure.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions: In the first aspect, an embodiment of the present invention provides a clamping mechanism for winding welding, including a plurality of jaws circumferentially distributed along a set circumference, the plurality of jaws are axially flush along the set circumference, and both circumferential sides of the jaws are provided with a plurality of radially distributed clamping teeth; When the clamping mechanism for winding welding is in the clamping state, the circumferentially adjacent clamping teeth among any two adjacent jaws are arranged staggeredly in the radial direction, so that all the clamping teeth on the adjacent sides enclose to form a plurality of clamping windows distributed in the radial direction, and each clamping window is used to accommodate a welding pair of the winding. The jaws are connected to a driving mechanism, and the driving mechanism can drive the adjacent jaws to move in opposite directions along the radial direction of the set circumference to clamp and fix or release the welding pair.

[0007] Optionally, the surface of the clamping tooth for cooperating with the welding pair is a clamping surface, and at least part of the clamping surface is arranged tangentially along the set circumference.

[0008] Optionally, the clamping tooth further includes a biting surface, and the extending directions of the biting surface and the clamping surface intersect and the included angle is a set acute angle; The biting surfaces of two circumferentially adjacent clamping teeth are parallel to each other.

[0009] Optionally, the driving mechanism includes a clamping driving disk. An outer guiding disk is arranged on one axial side of the clamping driving disk. An outer guiding part is arranged at the radially outer end of the jaw. The outer guiding part is slidably connected with the outer guiding disk along the radial direction. A jaw driving part is arranged on one axial side of the outer guiding part. The jaw driving part passes through a driving groove arranged on the clamping driving disk. The driving groove is arranged obliquely with respect to the radial direction of the clamping driving disk, and two adjacent driving grooves are symmetric with respect to the radial line of the clamping driving disk in the middle between them.

[0010] Optionally, a fixed disk is arranged on the other axial side of the clamping driving disk. One end of the clamping driving part is connected with the outer guiding part, and the other end extends into a first limiting groove arranged in the fixed disk. The radial width of the first limiting groove is greater than the outer diameter of the other end of the clamping driving part.

[0011] Optionally, it further includes an inner guiding disk coaxially arranged with the outer guiding disk. The inner guiding disk includes a first inner guiding disk and a second inner guiding disk which are axially stacked and connected, and a plurality of axially extending guiding columns are arranged between the two; The radially inner end of the jaw is provided with an inner guiding part. The inner guiding part is provided with a long hole, and the long hole is arranged along the moving direction of the jaw. Each long hole is slidably embedded with one of the guiding columns.

[0012] Optionally, the outer guiding disk is provided with a first guiding groove arranged in the radial direction, and the outer guiding part is slidably embedded in the first guiding groove so that the outer guiding part is slidably connected with the outer guiding disk.

[0013] In a second aspect, an embodiment of the present invention provides a winding welding positioning and fixing device, which includes the winding welding clamping mechanism described in the first aspect, and further includes a combing mechanism to perform circumferential positioning and combing on the welding pair before the winding welding clamping mechanism clamps the welding pair.

[0014] Optionally, the carding mechanism includes a carding guide disk. A carding drive disk is coaxially and rotatably connected to one side of the carding guide disk. The carding guide disk is radially and slidably connected to a plurality of carding teeth distributed circumferentially. A carding tooth drive member is provided at the outer end of the carding tooth. The carding tooth drive member extends into a guiding groove provided in the carding drive disk. A tooth head is provided at the inner end of the carding tooth. Along the radial direction of the carding mechanism from the outside to the inside, the width of the tooth head gradually decreases, so that a carding gap is formed between two adjacent tooth heads.

[0015] In a third aspect, an embodiment of the present invention provides a stator manufacturing method, which uses the winding welding positioning and fixing device described in the second aspect, and includes the following steps: Pass each welding pair at the winding welding end through the corresponding clamping window in the clamping mechanism for winding welding; The carding mechanism moves above the clamping mechanism for winding welding and performs circumferential carding and positioning on each welding pair; The driving mechanism drives the jaws to move, so that the radial dimension of the clamping window is reduced to clamp the welding pair. After each welding pair is clamped, the carding mechanism is withdrawn; The clamping mechanism for winding welding and the winding move to the welding station to weld the welding pairs.

[0016] After welding is completed, the driving mechanism drives the jaws to move to release the welding pair, and the clamping mechanism for winding welding is disengaged from the winding welding end.

[0017] The beneficial effects of the present invention are as follows: 1. For the winding welding clamping mechanism of the present invention, a plurality of jaws are arranged flush with each other along the axial direction of the set circumference, occupying a small space dimension in the axial direction, so that the clamping mechanism is suitable for clamping and fixing MiNiPin with a very small axial dimension.

[0018] 2. For the winding welding clamping mechanism of the present invention, the jaws are connected to the driving mechanism and can move radially along the set circumference under the drive of the driving mechanism, rather than moving circumferentially. Therefore, more clamping windows can be arranged and formed in the limited circumferential space. The clamping mechanism can clamp all the winding welding pairs that need to be welded at one time, improving the production efficiency.

[0019] 3. For the winding welding clamping mechanism of the present invention, the clamping surface of the clamping teeth is arranged tangentially along the set circumference, and the extending directions of the engaging surface and the clamping surface intersect and form a set acute angle. On the one hand, it can contact the winding well and play a role in clamping the winding. On the other hand, the radial interval distance between the clamping windows formed in the radial direction of the set circumference is small, so that the clamping mechanism can clamp all the windings that need to be welded, improving the working efficiency.

[0020] 4. The winding positioning and fixing device of the present invention includes a winding welding clamping mechanism and a combing mechanism. The combing mechanism circumferentially positions and combs the winding before the welding pair is clamped by the winding welding clamping mechanism. Before the welding pair is welded, the combing mechanism withdraws so that a larger axially sized exposed portion is left for the welding pair to be welded, thus facilitating the use of MiNiPin. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0022] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 is a schematic diagram of the overall structure of Embodiment 1 of the present invention when only one jaw is shown; Figure 3 is of the present invention Figure 2 cross-sectional view; Figure 4 is of the present invention Figure 2 explosion schematic Figure 1 ; Figure 5 is of the present invention Figure 2 explosion schematic Figure 2 ; Figure 6 is a schematic diagram of the cooperation of adjacent jaws in Embodiment 1 of the present invention; Figure 7 is a schematic diagram of adjacent jaws clamping and fixing the winding welding pair in Embodiment 1 of the present invention; Figure 8 is a top view of the clamping drive disk in Embodiment 1 of the present invention; Figure 9 is a schematic diagram of the working state in Embodiment 1 of the present invention; Figure 10 is of the present invention Figure 9 cross-sectional view; Figure 11 is of the present invention Figure 9 schematic diagram after moving up the outer guide disk, the first inner guide disk and the second inner guide disk in the present invention; Figure 12 is a schematic diagram of the structure of the combing mechanism in Embodiment 2 of the present invention Figure 1 ; Figure 13 is a schematic diagram of the structure of the combing mechanism in Embodiment 2 of the present invention Figure 2 ; Figure 14 is an explosion schematic of the combing mechanism in Embodiment 2 of the present invention Figure 1 ; Figure 15Explosion schematic diagram of the carding mechanism in Embodiment 2 of the present invention Figure 2 ; Figure 16 Schematic diagram of the carding gap formed between adjacent tooth heads in Embodiment 2 of the present invention; Figure 17 Schematic diagram of the working state of the carding mechanism in Embodiment 2 of the present invention; Figure 18 Partial enlarged view at the tooth head when the carding mechanism in Embodiment 2 of the present invention is working; Among them, 1. clamping jaw, 2. winding, 3. clamping tooth, 4. clamping window, 5. outer guide disk, 6. fixed disk, 7. clamping drive disk, 8. first inner guide disk, 9. second inner guide disk, 10. guide post, 11. clamping drive member, 12. stator, 13. carding guide disk, 14. carding drive disk, 15. carding tooth, 16. carding tooth drive member, 17. carding gap; 101. long hole; 301. second side surface, 302. third side surface; 501. first guide groove; 601. first limit groove; 701. first drive groove, 702. second drive groove; 1101. inner threaded cylinder, 1102. bolt; 1301. second guide groove; 1401. guiding groove; 1501. guiding portion, 1502. tooth head. Specific embodiments

[0023] In this embodiment, the circumferential direction refers to the circumferential direction of the set circumference, that is, the direction perpendicular to the radius line of the set circumference, the radial direction refers to the direction parallel to the radius line of the set circumference, and the axial direction refers to the extending direction of the axis of the set circumference. Unless otherwise specified, the axial, radial, and circumferential directions mentioned in each embodiment of the present application are referenced with the axial, radial, and circumferential directions of the iron core.

[0024] Embodiment 1 This embodiment provides a clamping mechanism for winding welding, which is suitable for clamping and fixing MiNiPin, and can also be used for clamping and fixing during the welding of other types of windings. As Figures 1 - 5 shown, the clamping mechanism for winding welding includes a plurality of clamping jaws 1 circumferentially distributed along the set circumference, and the long axis of the clamping jaw 1 is arranged along the radial direction of the set circumference. The clamping jaw 1 is connected to a driving mechanism, and the driving mechanism can simultaneously drive a plurality of clamping jaws 1 to perform linear motion along the radial direction of the set circumference, and the motion directions of any two adjacent clamping jaws 1 are opposite.

[0025] Along the axial direction of the set circumference, multiple jaws 1 are arranged flush, that is, the jaws 1 are not staggered axially along the set circumference. The upper sides of the multiple jaws 1 are flush with each other, and the lower sides are flush with each other. With this setting method, the jaws 1 occupy a small space in the axial direction of the set circumference.

[0026] As Figure 6 and Figure 7 shown, multiple clamping teeth 3 are arranged radially on both circumferential sides C of the jaw 1. In the same jaw 1, the corresponding clamping teeth 3 on both circumferential sides along the set circumference are arranged flush, that is, the upper sides of all the clamping teeth 3 are flush with each other, and the lower sides of all the clamping teeth 3 are flush with each other.

[0027] In the clamping state, among two adjacent jaws 1, the two corresponding clamping teeth 3 adjacent in the circumferential direction along the set circumference are arranged staggeredly in the radial direction, so that in two adjacent jaws 1, the two corresponding clamping teeth 3 on the mutually approaching sides of the jaws 1 can form a clamping window 4 for accommodating the winding welding pair. As Figure 6 shown, the multiple clamping windows 4 formed by any two adjacent jaws 1 are distributed radially along the set circumference, and each clamping window 4 is used to accommodate one welding pair.

[0028] In this embodiment, the number of clamping windows 4 formed by any two adjacent jaws 1 is the same as the number of welding pairs of the windings located in the same winding slot, so that the two jaws 1 can clamp a set of welding pair columns simultaneously.

[0029] As Figure 7 shown, the welding pairs to be welded of the winding 2 are placed into the clamping windows 4, and two adjacent jaws 1 move in opposite directions radially along the set circumference, so that the welding pairs of the winding 2 can be clamped and fixed by the two clamping teeth 3. Figure 7 The hollow double-headed arrow in

[0030] In this embodiment, the side of the clamping tooth 3 used to cooperate with the welding pair is defined as the clamping surface. Among adjacent jaws 1, the clamping surfaces of the corresponding clamping teeth 3 form the clamping window 4. The clamping surface is the second side surface 301 in the following text, which will be described in detail later and will not be elaborated here.

[0031] Furthermore, in order to ensure the clamping firmness of the clamping teeth 3 on the welding pairs of the winding 2, at least part of the clamping surface is arranged tangentially along the set circumference. With this setting method, the clamping surface contacts the welding surface of the winding 2. On the one hand, it can ensure the clamping firmness, and on the other hand, it avoids damage to the surface of the welding pairs of the winding 2 caused by the clamping force.

[0032] Preferably, the clamping surface is a plane, that is, the entire clamping surface is arranged tangentially along the set circumference.

[0033] The clamping teeth 3 can adopt a rectangular structure, a trapezoidal structure or a triangular structure. Preferably, the clamping teeth 3 adopt a triangular structure. The triangular structure has three side surfaces. Among them, the triangular structure is fixed to the side surface of the clamping jaw 1 through the first side surface, and the clamping teeth 3 of the triangular structure are integrally connected to the clamping jaw 1 through the first side surface.

[0034] The second side surface 301 of the clamping teeth 3 of the triangular structure serves as a clamping surface and is arranged along the tangent direction of the set circumference. The third side surface 302 of the clamping teeth 3 of the triangular structure is arranged at a set acute angle with the second side surface 301, that is, the extending directions of the third side surface 302 and the second side surface 301 intersect and the included angle is a set acute angle. The set acute angle can be determined according to the actual situation and will not be described in detail here.

[0035] Such as Figure 6 and Figure 7 As shown, in each clamping jaw 1, the clamping teeth 3 on both sides in the circumferential direction are symmetrically arranged with respect to the radial bisecting line of the clamping jaw 1. Among two adjacent clamping jaws 1 in the circumferential direction, the extending direction of the tooth tip of the clamping teeth 3 on one circumferential side of one clamping jaw 1 is parallel and opposite to the extending direction of the tooth tip of the clamping teeth 3 on the adjacent circumferential side of the other clamping jaw 1. Specifically, in this embodiment, the third side surface 302 serves as a biting surface, and among two adjacent clamping jaws 1, the third side surfaces 302 of two adjacent clamping teeth 3 are parallel to each other in the circumferential direction.

[0036] In this embodiment, the clamping teeth 3 adopt a triangular structure, and the clamping surface of the clamping teeth 3 is arranged along the tangential direction of the set circumference. On the one hand, it can contact the winding 2 well and play a role in clamping the winding. On the other hand, it makes the radial interval distance between the clamping windows 4 formed in the radial direction of the set circumference small. Combining with the feature that the plurality of clamping jaws 1 move radially along the set circumference, the clamping mechanism can clamp all the welding pairs of windings 2 to be welded, improving the working efficiency.

[0037] Among the two clamping teeth 3 for forming the clamping window 4 in two adjacent clamping jaws 1, the clamping surface of one clamping tooth 3 is arranged along the radial direction of the set circumference and faces the outside direction, and the clamping surface of the other clamping tooth 3 is arranged along the radial direction of the set circumference and faces the inside direction. The two clamping jaws 1 move synchronously in the radial direction of the set circumference in an opposite or away direction, and can realize clamping or loosening the welding pair of the winding 2 by using the clamping surface.

[0038] The driving mechanism for driving the clamping jaws 1 includes an outer guide disk 5, a fixed disk 6, a clamping driving disk 7, a first inner guide disk 8 and a second inner guide disk 9. The outer guide disk 5, the fixed disk 6, the clamping driving disk 7, the first inner guide disk 8 and the second inner guide disk 9 are all coaxially arranged with the set circumference where the plurality of clamping jaws 1 are distributed.

[0039] Both the outer guide disc 5 and the fixed disc 6 adopt an annular structure. The outer guide disc 5 is buckled on one side of the fixed disc 6 and is detachably and fixedly connected by a plurality of bolts evenly distributed at equal intervals along the circumferential direction of the outer guide disc 5, and the outer guide disc 5 is fixedly arranged. In other embodiments, the outer guide disc 5 can also be connected to the fixed disc 6 by plugging or other detachable fixing methods. It can be understood that the outer guide disc 5 can also be fixedly connected to the fixed disc 6 in a non-detachable manner.

[0040] The clamping drive disc 7 is arranged in the cavity formed between the outer guide disc 5 and the fixed disc 6, that is, the outer guide disc 5 is arranged on one axial side of the clamping drive disc 7, and the fixed disc 6 is arranged on the other axial side. The clamping drive disc 7 is rotatably connected to the outer guide disc 5 and the fixed disc 6, and the clamping drive disc 7 can rotate around its own axis.

[0041] In this embodiment, the clamping drive disc 7 also adopts an annular structure.

[0042] Furthermore, a driving block is arranged on the circumferential outer side of the clamping drive disc 7, and the clamping drive disc 7 can be driven to rotate around its own axis through the driving block. As Figures 3 - 5 shown, a part of the circumferential outer side of the clamping drive disc 7 protrudes radially away from the center of the set circle to form a driving block.

[0043] In one implementation manner, the staff can manually rotate the clamping drive disc 7 through the driving block. As Figures 10 - 11 shown, the driving block of the clamping drive disc 7 contacts a knob, and the clamping drive disc 7 can be driven by rotating the driving knob.

[0044] In another implementation manner, the driving block is connected to a power mechanism, and the power mechanism can act on the driving block, thereby driving the clamping drive disc 7 to rotate through the driving block. The power mechanism can adopt existing equipment and will not be described in detail here.

[0045] Preferably, as Figures 9 - 11 shown, a convex block matching the driving block is arranged on the circumferential outer side of the outer guide disc 5, and the convex block and the mounting member for mounting the knob enclose a space for accommodating the driving block.

[0046] The radially outer end of the jaw 1 is provided with an outer guiding portion, and the outer guiding portion is slidably connected to the outer guide disc 5 along the radial direction of the outer guide disc 5, so that the jaw 1 can move along the radial direction of the outer guide disc 5.

[0047] In this embodiment, a plurality of first guiding grooves 501 that match the outer guiding portion are provided along the circumferential direction on the inner ring surface of the outer guiding disc 5. The first guiding grooves 501 are arranged along the radial direction of the outer guiding disc 5 and their inner ends are open. The outer guiding portion is embedded in the first guiding grooves 501 and is slidably connected to the groove surfaces of the first guiding grooves 501, thereby realizing the radial sliding connection between the outer guiding portion and the outer guiding disc 5. With this setting method, since the first guiding grooves 501 are convenient to process, the processing difficulty of the outer guiding disc 5 is reduced, and it is convenient for the clamping jaw 1 to be assembled with the outer guiding disc 5.

[0048] In another embodiment, a slide rail is provided on the bottom surface of the outer guiding disc 5, and the outer guiding portion is slidably connected to the outer guiding disc 5 through the slide rail.

[0049] Those skilled in the art can select the radial sliding connection method between the outer guiding portion and the outer guiding disc 5 according to actual needs, and details are not described herein.

[0050] In this embodiment, the first inner guiding disc 8 and the second inner guiding disc 9 are axially stacked, and a plurality of axially extending guiding columns 10 are arranged between the first inner guiding disc 8 and the second inner guiding disc 9, and the plurality of guiding columns 10 are circumferentially spaced apart.

[0051] The radially inner end of the clamping jaw 1 is provided with an inner guiding portion, and a long hole 101 is formed in the inner guiding portion. The long axis of the long hole 101 is arranged along the movement direction of the clamping jaw 1, that is, along the radial direction of the outer guiding disc 5, the fixed disc 6, the clamping driving disc 7, the first inner guiding disc 8 and the second inner guiding disc 9.

[0052] The guiding column 10 is slidably embedded in the long hole 101, and the guiding column 10 is slidably connected to the hole surface of the long hole 101.

[0053] The guiding column 10 is fixed between the first inner guiding disc 8 and the second inner guiding disc 9, and one axial end of the guiding column 10 can be fixedly connected to one of the first inner guiding disc 8 and the second inner guiding disc 9.

[0054] Both the first inner guiding disc 8 and the second inner guiding disc 9 are arranged in the internal space of the outer guiding disc 5, the fixed disc 6 and the clamping driving disc 7. The first inner guiding disc 8 and the second inner guiding disc 9 adopt a coaxial annular structure, and the first inner guiding disc 8 and the second inner guiding disc 9 are detachably fixedly connected by a plurality of bolts evenly distributed along the circumferential direction.

[0055] In other embodiments, the first inner guiding disc 8 and the second inner guiding disc 9 can also be fixedly connected by a detachable connection method such as plugging or a non-detachable connection method.

[0056] In this embodiment, the radially outer end of the jaw 1 is guided by the cooperation of the outer guiding portion and the first guiding groove 501, and the radially inner end is guided by the cooperation of the long hole 101 on the inner guiding portion and the guiding column 10, so that the jaw 1 can stably perform a linear motion along the radial direction of the set circumference.

[0057] As Figure 4 and Figure 5 shown, a clamping driving member 11 is provided on one axial side of the outer guiding portion, and the clamping driving member 11 of each outer guiding portion passes through the clamping driving disc 7 through the corresponding driving groove provided on the clamping driving disc 7.

[0058] In this embodiment, as Figure 8 shown, the driving groove is a long groove, and the driving groove is inclined radially with respect to the clamping driving disc 7, that is, the long axis of the driving groove is arranged at a set acute angle with the radial line of the corresponding clamping driving disc 7.

[0059] Define two adjacent driving grooves as the first driving groove 701 and the second driving groove 702. The inclination directions of the first driving groove 701 and the second driving groove 702 are opposite, and there is a radial line of the clamping driving disc at the middle position between the first driving groove 701 and the second driving groove 702. The first driving groove 701 and the second driving groove 702 are symmetrically arranged with respect to the radial line of the clamping driving disc.

[0060] With this setting method, when the clamping driving disc 7 rotates around its own axis, under the action of the driving groove and the clamping driving member 11, the jaw 1 performs a linear motion along the radial direction of the outer guiding disc 5. Since the two adjacent driving grooves are symmetrically arranged with respect to the radial line of the clamping driving disc in the middle between them, the moving directions of the two adjacent jaws 1 are opposite.

[0061] The clamping driving member 11 includes an internally threaded cylinder 1101. The top end of the internally threaded cylinder 1101 is fixed to the bottom surface of the outer guiding portion. The axis of the internally threaded cylinder 1101 is perpendicular to the bottom surface of the outer guiding portion. The internally threaded cylinder 1101 passes through the driving groove, and the internally threaded cylinder 1101 is threadedly connected to the bolt 1102.

[0062] Further, in order to limit the radial movement of the jaw 1, the bolt 1102 is slidably inserted into the first limiting groove 601 opened on the top surface of the fixed disc 6. The radial width of the first limiting groove 601 is greater than the outer diameter of the head of the bolt 1102. The bolt 1102 can contact the inner ring groove surface or the outer ring groove surface of the first limiting groove 601, so as to limit the outward movement and inward movement of the jaw 1 along the radial direction.

[0063] Preferably, the first limiting groove 601 is an annular groove coaxial with the fixed disc 6, which is convenient for processing and manufacturing.

[0064] As Figures 9 - 11As shown in the figure, the working method of the clamping mechanism for winding welding in this embodiment is as follows: Place the clamping mechanism for winding welding and the welding pair of the winding 2 in position. The welding pair of the winding 2 is placed into the corresponding clamping window 4. In the initial state, the distance between the clamping surfaces of the clamping teeth 3 on both sides of the clamping window 4 is greater than the thickness of the welding pair, facilitating the placement of the welding pair into the clamping window 4.

[0065] Rotate the clamping drive disk 7. Under the action of the drive groove and the clamping drive member 11, all the clamping jaws 1 move radially along the outer guide disk 5, the fixed disk 6, the first inner guide disk 8, and the second inner guide disk 9, and the movement directions of adjacent clamping jaws 1 are opposite. The clamping surfaces of the clamping teeth 3 on both sides of the clamping window 4 approach each other to clamp and fix the welding pair of the winding 2.

[0066] By adopting the clamping mechanism for winding welding in this embodiment, the defects of the current winding clamping mechanism are overcome. Multiple clamping jaws 1 are arranged flush with each other along the axial direction of the set circumference, occupying a small space dimension in the axial direction, making the clamping mechanism suitable for clamping and fixing the MiNiPin with a very small axial dimension, thereby facilitating the reduction of the axial height of the stator.

[0067] Embodiment 2 This embodiment provides a positioning and fixing device for winding welding, including the clamping mechanism for winding welding in Embodiment 1, and further including a combing mechanism. The combing mechanism is used to perform circumferential positioning and combing on the winding 2 of the stator 12 before the winding is clamped and fixed by the clamping mechanism for winding welding. The combing mechanism is used in cooperation with the clamping mechanism for winding welding.

[0068] As Figures 12 - 15 shown, the combing mechanism includes a combing guide disk 13. A combing drive disk 14 is coaxially provided on one side of the combing guide disk 13. The combing drive disk 14 is coaxially arranged with the combing guide disk 13, and the combing drive disk 14 is rotatably connected to the combing guide disk 13. The combing drive disk 14 can rotate around its own axis.

[0069] In this embodiment, both the combing guide disk 13 and the combing drive disk 14 adopt an annular structure.

[0070] In this embodiment, the central axes of the combing mechanism and the clamping mechanism for winding welding are collinear, that is, the centers of the combing guide disk 13, the combing drive disk 14, the outer guide disk 5, the fixed disk 6, the clamping drive disk 7, the first inner guide disk 8, and the second inner guide disk 9 are coaxially arranged with the set circumference where multiple clamping jaws 1 are distributed.

[0071] Specifically, the bottom surface of the carding guide disk 13 is provided with a circular groove that matches the carding drive disk 14. The carding drive disk 14 is located inside the circular groove and is slidably connected to the side groove surface of the circular groove, so that the carding drive disk 14 can rotate around its own axis. A plurality of limiting plates are arranged at equal intervals along the circumferential direction on the bottom surface of the carding guide disk 13. The limiting plates are fixedly connected to the carding guide disk 13 by bolts. The limiting plates are in contact with and slidably connected to the bottom edge of the carding drive disk 14, and are used to prevent the carding drive disk 14 from disengaging from the inside of the circular groove.

[0072] A plurality of carding teeth 15 are slidably connected to the carding guide disk 13 along the radial direction. In this embodiment, the plurality of carding teeth 15 are distributed along the circumferential direction of the carding guide disk 13.

[0073] In this embodiment, the carding tooth 15 includes a guiding portion 1501, a tooth head 1502, and a connecting portion arranged between the guiding portion 1501 and the tooth head 1502. The inner end of the guiding portion 1501 is vertically connected to the top end of the connecting portion, and the outer end of the tooth head 1502 is vertically connected to the bottom end of the connecting portion.

[0074] The guiding portion 1501 is slidably connected to the carding guide disk 13. Specifically, a plurality of second guiding grooves 1301 are arranged along the circumferential direction on one axial side of the carding guide disk 13. The second guiding grooves 1301 are arranged along the radial direction of the carding guide disk 13, and the inner ends of the second guiding grooves 1301 extend to the inner ring surface of the carding guide disk 13. The axial openings of the second guiding grooves 1301 face the carding drive disk 14.

[0075] The guiding portion 1501 is embedded in the second guiding groove 1301 and is slidably connected to the groove surface of the second guiding groove 1301, thereby realizing the radial sliding connection between the carding tooth 15 and the carding guide disk 13.

[0076] A carding tooth driving member 16 is arranged on the axial side of the guiding portion 1501 away from the carding guide disk 13. In this embodiment, the carding tooth driving member 16 is a guiding wheel rotatably connected to the bottom surface of the guiding portion 1501, and the guiding wheel extends into a corresponding guiding groove 1401 arranged in the carding drive disk 14. In this embodiment, since the radial movement path of the carding tooth 15 is relatively long, the guiding groove 1401 is a long strip-shaped arc groove and is inclined with respect to the corresponding radial line of the carding drive disk.

[0077] With this setting method, when the carding drive disk 14 is rotated, under the cooperation of the guiding wheel and the guiding groove 1401, the carding tooth 15 can perform a linear motion along the radial direction of the carding guide disk 13.

[0078] In this embodiment, as Figure 16As shown, a carding gap 17 for accommodating windings of the same winding groove is formed between the tooth heads 1502 of adjacent carding teeth 15. Along the radial direction of the carding guide disc 13 from outside to inside, the width of the tooth heads 1502 gradually decreases. During the movement of the tooth heads 1502 from outside to inside, the gap between adjacent tooth heads 1502 gradually decreases until each row of windings 2 is firmly clamped between two adjacent tooth heads 1502, so that the ends of all windings 2 are circumferentially positioned simultaneously in one operation.

[0079] Furthermore, a driving plate is provided on the circumferential outer side of the carding driving disc 14, and the staff can manually drive the carding driving disc 14 to rotate around its own axis through the driving plate. It can be understood that the driving plate can also be connected to a power mechanism, and the power mechanism drives the carding driving disc 14 to rotate around its own axis through the driving plate. The power mechanism can adopt linear telescopic components such as cylinders or hydraulic cylinders, and those skilled in the art can set it according to actual needs.

[0080] Specifically, a driving column is provided on the telescopic part of the linear telescopic component. The driving column extends into a long strip chute provided on the driving plate, and the driving column is slidably connected to the long strip chute. The telescopic movement of the linear telescopic component can drive the carding driving disc to rotate around its own axis through the driving plate.

[0081] In order to limit the rotation angle of the carding driving disc 14, a second limiting groove is provided on the bottom surface of the carding guide disc 13. The driving plate extends into the second limiting groove, and the rotation angle of the carding driving disc 14 is limited through the second limiting groove.

[0082] The usage method of the positioning and fixing device for winding welding in this embodiment is as follows: First, the clamping mechanism for winding welding is matched with the winding 2 to be welded, and the welding pair of the winding 2 to be welded is placed into the corresponding clamping window 4.

[0083] At this time, move the clamping mechanism for winding welding and the winding to be welded to the carding station. As Figures 17 - 18 shown, the carding mechanism moves, so that the carding mechanism is matched with the winding 2, and then the carding driving disc 14 rotates, and the carding teeth 15 move radially inward, and the tooth heads 1502 are used to clamp the winding 2 to perform circumferential positioning on the winding 2.

[0084] After the positioning is completed, the carding mechanism withdraws, the clamping driving disc 7 rotates, and the adjacent jaws 1 move in opposite directions radially, and the corresponding two jaws 1 clamp and fix the welding pair of the winding.

[0085] At this time, the clamping mechanism for winding welding and the winding to be welded move into the welding station, and the welding pair is welded by using welding equipment. The welding equipment can adopt existing technologies and will not be described in detail here.

[0086] In the positioning and fixing device of this embodiment, before the winding welding clamping mechanism clamps and welds the pairs, the combing mechanism circumferentially positions and combs the windings. Before the winding welding clamping mechanism clamps the windings, the combing mechanism withdraws to leave a larger axially sized exposed end Pin for welding, thus facilitating the use of MiNiPin. Both the combing step and the positioning and fixing step are completed in one step, without the need to position the multiple windings 2 one by one in sequence, and the positioning efficiency is high.

[0087] Embodiment 3 This embodiment provides a stator manufacturing method, which is carried out by using the winding welding positioning and fixing device of Embodiment 2, and includes the following steps: Pass each welding pair at the welding end of the winding through the corresponding clamping window 4 in the clamping mechanism for winding welding.

[0088] The combing mechanism moves above the winding welding and clamping mechanism and circumferentially combs and positions each welding pair. The combing mechanism can be moved by using existing motion driving equipment, which will not be described in detail here. The combing and positioning method can adopt the working method of the combing mechanism described in Embodiment 2, and will not be repeated here.

[0089] The driving mechanism drives the jaw 1 to move, so that the radial dimension of the clamping window 4 is reduced to clamp and fix the welding pair. After each welding pair is clamped, the combing mechanism withdraws.

[0090] The clamping mechanism for winding welding and the winding move to the welding station to weld the welding pairs.

[0091] After welding is completed, the driving mechanism drives the jaw 1 to move to release the welding pair, and the clamping mechanism for winding welding is disengaged from the welding end of the winding.

[0092] The clamping mechanism for winding welding can move to the welding station by using an existing transfer mechanism, which will not be described in detail here.

[0093] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A clamping mechanism for winding welding, characterized in that, It includes a plurality of jaws circumferentially distributed along a set circumference, the plurality of jaws are arranged flush with each other along the axial direction of the set circumference, and a plurality of clamping teeth are arranged radially on both circumferential sides of the jaws; When the clamping mechanism for winding welding is in the clamping state, the circumferentially adjacent clamping teeth among any two adjacent jaws are arranged staggeredly along the radial direction, so that all the clamping teeth on the adjacent sides enclose to form a plurality of clamping windows distributed along the radial direction, and each clamping window is used to accommodate a welding pair of the winding. The jaws are connected to a driving mechanism, and the driving mechanism can drive the adjacent jaws to move in opposite directions along the radial direction of the set circumference to clamp and fix or release the welding pair.

2. The clamping mechanism for winding welding according to claim 1, characterized in that, The surface of the clamping teeth for cooperating with the welding pair is a clamping surface, and at least part of the clamping surface is arranged tangentially along the set circumference.

3. The clamping mechanism for winding welding according to claim 2, characterized in that, The clamping teeth further include an engaging surface, and the extending directions of the engaging surface and the clamping surface intersect and form a set acute angle; The engaging surfaces of two circumferentially adjacent clamping teeth are parallel to each other.

4. The clamping mechanism for winding welding according to claim 1, characterized in that, The driving mechanism includes a clamping driving disk. An outer guiding disk is arranged on one axial side of the clamping driving disk. An outer guiding portion is arranged at the radially outer end of the jaw, and the outer guiding portion is slidably connected to the outer guiding disk along the radial direction. A clamping driving member is arranged on one axial side of the outer guiding portion. The clamping driving member passes through a driving slot arranged on the clamping driving disk, and the driving slot is arranged obliquely with respect to the radial direction of the clamping driving disk. The driving slots of two adjacent driving slots are symmetric with respect to the radial line of the clamping driving disk in the middle between them.

5. The clamping mechanism for winding welding according to claim 4, characterized in that, A fixing disk is arranged on the other axial side of the clamping driving disk. One end of the clamping driving member is connected to the outer guiding portion, and the other end extends into a first limiting slot arranged in the fixing disk. The radial width of the first limiting slot is greater than the outer diameter of the other end of the clamping driving member.

6. The clamping mechanism for winding welding according to claim 4, characterized in that, It further includes an inner guiding disk coaxially arranged with the outer guiding disk. The inner guiding disk includes a first inner guiding disk and a second inner guiding disk which are axially stacked and connected, and a plurality of axially extending guiding columns are arranged between the two; An inner guiding portion is arranged at the radially inner end of the jaw. The inner guiding portion is provided with a long hole, and the long hole is arranged along the moving direction of the jaw. Each long hole is slidably embedded with one of the guiding columns.

7. The clamping mechanism for winding welding according to claim 4, characterized in that, The outer guiding disk is provided with a first guiding slot arranged along the radial direction, and the outer guiding portion is slidably embedded in the first guiding slot so that the outer guiding portion is slidably connected to the outer guiding disk.

8. Winding welding positioning and fixing device, characterized in that, It includes the clamping mechanism for winding welding according to any one of claims 1-7, and further includes a combing mechanism to perform circumferential positioning and combing on the welding pair before the clamping mechanism for winding welding clamps the welding pair.

9. The winding welding positioning and fixing device according to claim 8, characterized in that, The combing mechanism includes a combing guiding disk. A combing driving disk is coaxially rotatably connected to one side of the combing guiding disk. The combing guiding disk is radially slidably connected to a plurality of circumferentially distributed combing teeth. A combing tooth driving member is arranged at the outer end of the combing tooth. The combing tooth driving member extends into a guiding slot arranged in the combing driving disk. A tooth head is arranged at the inner end of the combing tooth. Along the radial direction of the combing mechanism from the outside to the inside, the width of the tooth head gradually decreases, so that a combing gap is formed between two adjacent tooth heads.

10. A method for manufacturing a stator, characterized in that, Adopting the winding welding positioning and fixing device according to claim 8, it includes the following steps: Pass each welding pair at the welding end of the winding through the corresponding clamping window in the clamping mechanism for winding welding; The combing mechanism moves above the clamping mechanism for winding welding and circumferentially combs and positions each welding pair; The driving mechanism drives the jaws to move, so that the radial dimension of the clamping window is reduced to clamp the welding pair. After each welding pair is clamped, the combing mechanism is withdrawn; The clamping mechanism for winding welding and the winding move to the welding station to weld the welding pairs.

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