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

Abstract

The present invention relates to a clamping mechanism, a positioning and fixing device and a stator manufacturing method for winding welding, which belongs to the technical field of motor production. It solves the defect that traditional winding fixing tooling cannot be applied to MiNiPin. The clamping mechanism for winding welding includes a plurality of clamping jaws distributed circumferentially along a set circumference, and the plurality of clamping jaws are arranged flush along the axial direction of the set circumference. A plurality of clamping teeth distributed radially are provided on both circumferential sides of the clamping jaws. When the clamping mechanism for winding welding is in a clamping state, the circumferentially adjacent clamping teeth of any two adjacent clamping jaws are staggered radially so that all the clamping teeth on the adjacent sides enclose a plurality of clamping windows distributed radially. Each clamping window is used to accommodate a welding pair of the winding. The clamping jaws are connected to a driving mechanism, and the driving mechanism can drive the adjacent clamping jaws to move in opposite directions along the radial direction of the set circumference to clamp or release the welding pair. The clamping mechanism of the present invention meets the use requirements of MiNiPin.

Description

Technical Field

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

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

[0003] With market demand for motor miniaturization and high power density, stator end windings are expected to have a smaller axial height. This has led to the emergence of a flat wire end structure known in the industry as ultra-short PIN or MiniPin (referring to windings with an axial height of no more than 5mm at the soldering portion). The MiniPin's soldering portion has a very small axial height, which places higher demands on the welding tooling. The clamping portion of the welding tooling is expected to have a minimum axial height to avoid occupying the axial space of the winding end. Due to the very small axial height of the MiniPin's soldering portion, a welding tool with a larger clamping portion will not be able to clamp the MiniPin end.

[0004] For example, patent CN117862795B discloses a winding welding tool for trimming and positioning the stator end windings of flat wire motors during welding. The clamping jaws in this tool are used in conjunction with a clamping plate, and the clamping jaws and clamping plate are arranged in layers in the axial direction, which consumes a large amount of axial space. Patent CN220717637U discloses a cutting device for reducing the height of the copper wire at the stator welding end. The clamping jaw module includes a main clamping jaw and a secondary clamping jaw, which are also arranged in layers in the axial direction. Therefore, the technical solutions disclosed in these two patents are not applicable to the clamping and fixation of the MinPin flat wire end structure. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a clamping mechanism, a positioning and fixing device and a stator manufacturing method for winding welding, which are suitable for clamping and fixing the MinPin flat wire end structure during welding.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a clamping mechanism for winding welding, comprising a plurality of clamping jaws distributed circumferentially along a set circumference, the plurality of clamping jaws being arranged flush along the axial direction of the set circumference, and a plurality of clamping teeth distributed radially on both circumferential sides of the clamping jaws;

[0008] When the clamping mechanism for winding welding is in the clamping state, the circumferentially adjacent teeth in any two adjacent jaws are staggered radially so that all the teeth on the adjacent sides enclose a plurality of clamping windows distributed radially, each clamping window being used to accommodate a welding pair of the winding. The jaws are connected to a driving mechanism, which can drive adjacent jaws to move in opposite directions along the radial direction of a set circle to clamp or release the welding pair.

[0009] Optionally, the surface of the clamping teeth used to cooperate with the welding pair is a clamping surface, and the clamping surface is at least partially arranged along the tangent direction of the set circumference.

[0010] Optionally, the clamping teeth further include an occlusal surface, and the extending directions of the occlusal surface and the clamping surface intersect with each other and the included angle is a set acute angle;

[0011] The engaging surfaces of two circumferentially adjacent clamping teeth are parallel to each other.

[0012] Optionally, the driving mechanism includes a clamping drive disk, an outer guide disk is provided on one axial side of the clamping drive disk, an outer guide portion is provided on the radial outer end of the clamping jaw, the outer guide portion is radially slidably connected to the outer guide disk, a clamping jaw driving member is provided on one axial side of the outer guide portion, the clamping jaw driving member passes through a driving groove provided on the clamping drive disk, the driving groove is inclined relative to the radial direction of the clamping drive disk, and two adjacent driving grooves are symmetrical relative to the radial line of the clamping drive disk in the middle between the two.

[0013] Optionally, a fixed disk is provided on the other axial side of the clamping drive disk, one end of the clamping drive member is connected to the outer guide portion, and the other end extends into a first limiting groove provided in the fixed disk, and the radial width of the first limiting groove is greater than the outer diameter of the other end of the clamping drive member.

[0014] Optionally, the invention further comprises an inner guide disc coaxially arranged with the outer guide disc, wherein the inner guide disc comprises a first inner guide disc and a second inner guide disc axially stacked and connected, with a plurality of axially extending guide posts arranged therebetween;

[0015] An inner guide portion is provided at the radial inner end of the clamping jaw. The inner guide portion is provided with an elongated hole. The elongated hole is arranged along the movement direction of the clamping jaw. A guide column is slidably embedded in each elongated hole.

[0016] Optionally, the outer guide disc is provided with a first guide groove arranged in a radial direction, and the outer guide portion is slidably embedded in the first guide groove so that the outer guide portion is slidably connected to the outer guide disc.

[0017] In a second aspect, an embodiment of the present invention provides a winding welding positioning and fixing device, comprising the winding welding clamping mechanism described in the first aspect, and also comprising a combing mechanism for circumferentially positioning and combing the welding pair before the winding welding clamping mechanism clamps the welding pair.

[0018] Optionally, the combing mechanism includes a combing guide disk, one side of which is coaxially rotatably connected to a combing drive disk, the combing guide disk is radially slidingly connected to a plurality of combing teeth distributed along the circumferential direction, the outer end of the combing tooth is provided with a combing tooth drive member, the combing tooth drive member extends into a guide groove provided on the combing drive disk, the inner end of the combing tooth is provided with a tooth head, and the width of the tooth head gradually decreases from the outside to the inside along the radial direction of the combing mechanism, so that a combing gap is formed between two adjacent tooth heads.

[0019] In a third aspect, an embodiment of the present invention provides a stator manufacturing method, using the winding welding positioning and fixing device described in the second aspect, comprising the following steps:

[0020] Pass each welding pair of the winding welding end through the corresponding clamping window in the winding welding clamping mechanism;

[0021] The combing mechanism moves to the top of the clamping mechanism for winding welding and performs circumferential combing and positioning of each welding pair;

[0022] The driving mechanism drives the clamping claw to move, so that the radial size of the clamping window is reduced to clamp the welding pairs, and after all welding pairs are clamped, the combing mechanism is withdrawn;

[0023] The winding welding clamping mechanism and the winding are moved to the welding station for welding of the welding pair.

[0024] After welding is completed, the driving mechanism drives the clamping jaws to move, loosens the welding pair, and the clamping mechanism for winding welding and the winding welding end are released from the matching state.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The winding welding clamping mechanism of the present invention has multiple clamping claws arranged flush along the axial direction of a set circumference, occupying a small space in the axial direction, making the clamping mechanism suitable for clamping and fixing MiNiPins with very small axial dimensions.

[0027] 2. The winding welding clamping mechanism of the present invention has a clamping jaw connected to a driving mechanism, which can move radially along a set circle rather than circumferentially under the drive of the driving mechanism, thereby forming more clamping windows within a limited circumferential space. The clamping mechanism can clamp all winding welding pairs that need to be welded at one time, thereby improving production efficiency.

[0028] 3. In the winding welding clamping mechanism of the present invention, the clamping surface of the clamping teeth is arranged along the tangent direction of the set circumference, and the extension directions of the occlusal surface and the clamping surface intersect and the included angle is a set acute angle. On the one hand, it can make good contact with the winding and play the role of clamping the winding. On the other hand, the radial spacing distance between the clamping windows formed in the radial direction of the set circumference is small, so that the clamping mechanism can clamp all windings that need to be welded, thereby improving work efficiency.

[0029] 4. The winding positioning and fixing device of the present invention includes a winding welding clamping mechanism and a combing mechanism. The combing mechanism performs circumferential positioning and combing on the winding before the winding welding clamping mechanism clamps the welding pair. Before the welding pair is welded, the combing mechanism is withdrawn to leave a larger axial exposed portion of the welding pair for welding, thereby facilitating the use of MiNiPin. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0031] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the overall structure of Example 1 of the present invention when only one clamping claw is displayed;

[0033] Figure 3 This invention Figure 2 sectional view of

[0034] Figure 4 This invention Figure 2 Explosion diagram Figure 1 ;

[0035] Figure 5 This invention Figure 2 Explosion diagram Figure 2 ;

[0036] Figure 6 This is a schematic diagram of the cooperation of adjacent clamping jaws in Example 1 of the present invention;

[0037] Figure 7 Schematic diagram of a welding pair of windings clamped and fixed by adjacent clamping jaws in embodiment 1 of the present invention;

[0038] Figure 8 1 is a top view of the clamping drive disk of embodiment 1 of the present invention;

[0039] Figure 9 This is a schematic diagram of the working state of embodiment 1 of the present invention;

[0040] Figure 10 This invention Figure 9 sectional view of

[0041] Figure 11 This invention Figure 9 Middle is a schematic diagram after the outer guide plate, the first inner guide plate and the second inner guide plate are moved upwards;

[0042] Figure 12 This is a schematic diagram of the structure of the combing mechanism of embodiment 2 of the present invention. Figure 1 ;

[0043] Figure 13 This is a schematic diagram of the structure of the combing mechanism of embodiment 2 of the present invention. Figure 2 ;

[0044] Figure 14 This is a schematic diagram of the explosion of the combing mechanism of Example 2 of the present invention Figure 1 ;

[0045] Figure 15 This is a schematic diagram of the explosion of the combing mechanism of Example 2 of the present invention Figure 2 ;

[0046] Figure 16 Schematic diagram of the combing gap formed between adjacent tooth heads in Example 2 of the present invention;

[0047] Figure 17 This is a schematic diagram of the working state of the combing mechanism of Example 2 of the present invention;

[0048] Figure 18 This is a partial enlarged view of the tooth head when the combing mechanism of Example 2 of the present invention is working;

[0049] Among them, 1. Clamping claw, 2. Winding, 3. Clamping teeth, 4. Clamping window, 5. Outer guide plate, 6. Fixed plate, 7. Clamping drive plate, 8. First inner guide plate, 9. Second inner guide plate, 10. Guide column, 11. Clamping drive member, 12. Stator, 13. Combing guide plate, 14. Combing drive plate, 15. Combing teeth, 16. Combing tooth drive member, 17. Combing gap;

[0050] 101. Long hole;

[0051] 301. Second side, 302. Third side;

[0052] 501. First guide groove;

[0053] 601. First limiting slot;

[0054] 701. First drive slot, 702. Second drive slot;

[0055] 1101. Internally threaded barrel, 1102. Bolt;

[0056] 1301. Second guide groove;

[0057] 1401. Guide groove;

[0058] 1501. Guide part, 1502. Tooth head. DETAILED DESCRIPTION

[0059] In this embodiment, the circumferential direction refers to the annular direction of the set circle, that is, the direction perpendicular to the set circle radius line, the radial direction refers to the direction parallel to the set circle radius line, and the axial direction refers to the extension direction of the set circle axis. Unless otherwise specified, the axial, radial and circumferential directions mentioned in the embodiments of this application are all based on the axial, radial and circumferential directions of the iron core.

[0060] Example 1

[0061] 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 other types of winding welding. Figure 1-Figure 5 As shown, the winding welding clamping mechanism includes multiple jaws 1 distributed circumferentially along a predetermined circumference, with the long axes of the jaws 1 arranged radially along the predetermined circumference. The jaws 1 are connected to a drive mechanism capable of simultaneously driving multiple jaws 1 to perform linear motion radially along the predetermined circumference, with any two adjacent jaws 1 moving in opposite directions.

[0062] Along the axis direction of the set circumference, the multiple clamping jaws 1 are arranged in parallel, that is, the clamping jaws 1 are arranged in a non-staggered manner along the axial direction of the set circumference. The upper side surfaces of the multiple clamping jaws 1 are aligned, and the lower side surfaces are aligned. With this arrangement, the clamping jaws 1 occupy a small space in the axial direction of the set circumference.

[0063] like Figure 6 and Figure 7 As shown, both sides of the circumference C of the clamping jaw 1 are provided with a plurality of radially distributed clamping teeth 3. In the same clamping jaw 1, the corresponding clamping teeth 3 on both sides of 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.

[0064] In the clamping state, two corresponding clamping teeth 3 adjacent to each other along the set circumference of two adjacent clamping jaws 1 are radially staggered so that the two corresponding clamping teeth 3 on the sides of the clamping jaws 1 close to each other can form a clamping window 4 for accommodating the winding welding pair. Figure 6 As shown, a plurality of clamping windows 4 formed by any two adjacent clamping jaws 1 are distributed radially along a set circumference, and each clamping window 4 is used to accommodate a welding pair.

[0065] In this embodiment, the number of clamping windows 4 formed by any two adjacent clamping jaws 1 is the same as the number of welding pairs of the winding located in the same winding slot, so that the two clamping jaws 1 can clamp a group of welding pairs at the same time.

[0066] like Figure 7 As shown, the welding pair of the winding 2 to be welded is placed in the clamping window 4, and the two adjacent clamping jaws 1 move in opposite directions along the radial direction of the set circumference, so that the welding pair of the winding 2 can be clamped and fixed by the two clamping teeth 3. Figure 7The hollow double-headed arrows indicate the movement direction of the clamping jaw 1.

[0067] In this embodiment, the side surface of the clamping teeth 3 that is used to mate with the welding pair is defined as the clamping surface. The clamping surfaces of the corresponding clamping teeth 3 in the adjacent jaws 1 form the clamping window 4. The clamping surface is referred to as the second side surface 301 below and will be described in detail below and will not be repeated here.

[0068] Furthermore, in order to ensure the clamping firmness of the teeth 3 on the welding pair of the winding 2, the clamping surface is at least partially arranged along the tangent of the set circle. With this arrangement, 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 pair of the winding 2 caused by the clamping force.

[0069] Preferably, the clamping surface is a plane, that is, the entire clamping surface is arranged along the tangent direction of the set circumference.

[0070] The clamping teeth 3 can be rectangular, trapezoidal, or triangular in structure. Preferably, the clamping teeth 3 are triangular in structure. The triangular structure has three sides, wherein the triangular structure is fixed to the side of the clamping jaw 1 through the first side, and the clamping teeth 3 of the triangular structure are integrally connected to the clamping jaw 1 through the first side.

[0071] The second side surface 301 of the triangular-shaped clamping tooth 3 serves as a clamping surface and is arranged along a tangent line of a predetermined circle. The third side surface 302 of the triangular-shaped clamping tooth 3 is arranged at a predetermined acute angle with the second side surface 301. That is, the third side surface 302 and the second side surface 301 extend in directions that intersect and form a predetermined acute angle. The predetermined acute angle can be determined based on actual conditions and is not described in detail here.

[0072] like Figure 6 and Figure 7 As shown, in each clamping jaw 1, the teeth 3 on both sides of the circumference are arranged symmetrically about the radial midline of the clamping jaw 1. In two circumferentially adjacent clamping jaws 1, the tooth tips of the teeth 3 on one circumferential side of one clamping jaw 1 extend in a direction parallel to and opposite to the tooth tips of the teeth 3 on the circumferentially adjacent side of the other clamping jaw 1. Specifically, in this embodiment, the third side surface 302 serves as the occlusal surface, and the third side surfaces 302 of two circumferentially adjacent teeth 3 in two adjacent clamping jaws 1 are parallel to each other.

[0073] In this embodiment, the teeth 3 are triangular in structure, with the clamping surfaces of the teeth 3 arranged tangentially along a predetermined circumference. This ensures good contact with the winding 2, thereby clamping the winding. Furthermore, this minimizes the radial spacing between the clamping windows 4 formed radially along the predetermined circumference. Combined with the radial movement of the multiple jaws 1 along the predetermined circumference, the clamping mechanism can clamp all pairs of windings 2 to be welded, improving work efficiency.

[0074] In two adjacent clamping jaws 1, the clamping surface of one of the two clamping teeth 3 used to form the clamping window 4 is arranged to face outward in the radial direction of a predetermined circumference, while the clamping surface of the other clamping tooth 3 is arranged to face inward in the radial direction of the predetermined circumference. The two clamping jaws 1 can perform synchronous movement toward or away from each other in the radial direction of the predetermined circumference, thereby tightening or loosening the welding pair of the winding 2 using the clamping surfaces.

[0075] The driving mechanism for driving the clamping jaws 1 includes an outer guide plate 5, a fixed plate 6, a clamping drive plate 7, a first inner guide plate 8 and a second inner guide plate 9. The outer guide plate 5, the fixed plate 6, the clamping drive plate 7, the first inner guide plate 8 and the second inner guide plate 9 are all coaxially arranged with the set circle on which the multiple clamping jaws 1 are distributed.

[0076] The outer guide plate 5 and the fixed plate 6 both have an annular structure. The outer guide plate 5 is buckled onto one side of the fixed plate 6 and is removably fixedly connected by a plurality of bolts equidistantly spaced along the circumference of the outer guide plate 5. The outer guide plate 5 is fixedly mounted. In other embodiments, the outer guide plate 5 may be plug-connected to the fixed plate 6 or may be removably fixed in other ways. It is understood that the outer guide plate 5 may also be fixedly connected to the fixed plate 6 in a non-removable manner.

[0077] The clamping drive disk 7 is arranged in the cavity formed between the outer guide disk 5 and the fixed disk 6, that is, the outer guide disk 5 is provided on one axial side of the clamping drive disk 7, and the fixed disk 6 is provided on the other axial side. The clamping drive disk 7 is rotatably connected to the outer guide disk 5 and the fixed disk 6, and the clamping drive disk 7 can rotate around its own axis.

[0078] In this embodiment, the clamping drive disk 7 also adopts a circular ring structure.

[0079] Furthermore, a driving block is provided on the circumferential outer side of the clamping drive disk 7, which can drive the clamping drive disk 7 to rotate around its own axis. Figure 3-Figure 5 As shown, the circumferential outer portion of the clamping drive disc 7 protrudes in the radial direction away from the set circumferential center to form a drive block.

[0080] In one embodiment, the staff can manually rotate the clamping drive disc 7 through the drive block. Figure 10-11 As shown, the driving block of the clamping driving disk 7 is in contact with a knob, and the clamping driving disk 7 can be driven by rotating the driving knob.

[0081] In another embodiment, the driving block is connected to a power mechanism, which can act on the driving block, thereby driving the clamping drive disc 7 to rotate. The power mechanism can use existing equipment and will not be described in detail here.

[0082] Preferably, Figures 9-11As shown, a convex block matching the driving block is provided on the circumferential outer side of the outer guide plate 5 , and the convex block and the mounting piece for mounting the knob together form a space for accommodating the driving block.

[0083] An outer guide portion is provided at the radial outer end of the clamping jaw 1 , and the outer guide portion is slidably connected to the outer guide disc 5 along the radial direction of the outer guide disc 5 , so that the clamping jaw 1 can move along the radial direction of the outer guide disc 5 .

[0084] In this embodiment, the inner annular surface of the outer guide disc 5 is circumferentially defined with a plurality of first guide grooves 501 that mate with the outer guide portion. These first guide grooves 501 are radially disposed along the outer guide disc 5, with their inner ends left open. The outer guide portion fits within the first guide grooves 501 and slides along the groove surfaces of the first guide grooves 501, thereby achieving a radially sliding connection between the outer guide portion and the outer guide disc 5. This arrangement simplifies the machining of the outer guide disc 5 due to the ease of fabrication of the first guide grooves 501, further facilitating assembly of the clamping jaw 1 and the outer guide disc 5.

[0085] In another embodiment, a slide rail is provided on the bottom surface of the outer guide plate 5 , and the outer guide portion is slidably connected to the outer guide plate 5 via the slide rail.

[0086] Those skilled in the art may select the radial sliding connection method between the outer guide portion and the outer guide disc 5 according to actual needs, which will not be described in detail here.

[0087] In this embodiment, the first inner guide disc 8 and the second inner guide disc 9 are axially stacked, and a plurality of axially extending guide posts 10 are provided between the first inner guide disc 8 and the second inner guide disc 9. The plurality of guide posts 10 are distributed at intervals along the circumferential direction.

[0088] An inner guide portion is provided at the radial inner end of the clamping jaw 1, and an elongated hole 101 is opened in the inner guide portion. The long axis of the elongated hole 101 is arranged along the movement direction of the clamping jaw 1, that is, along the radial direction of the outer guide plate 5, the fixed plate 6, the clamping drive plate 7, the first inner guide plate 8 and the second inner guide plate 9.

[0089] The guide post 10 is slidably embedded in the elongated hole 101 , and the guide post 10 is slidably connected to the hole surface of the elongated hole 101 .

[0090] The guide column 10 is fixed between the first inner guide disc 8 and the second inner guide disc 9 , and one axial end of the guide column 10 is fixedly connected to one of the first inner guide disc 8 and the second inner guide disc 9 .

[0091] The first inner guide plate 8 and the second inner guide plate 9 are both disposed in the internal space of the outer guide plate 5, the fixed plate 6, and the clamping drive plate 7. The first inner guide plate 8 and the second inner guide plate 9 are coaxially arranged in an annular structure and are detachably fixedly connected by a plurality of bolts equidistantly spaced along the annular direction.

[0092] In other embodiments, the first inner guide plate 8 and the second inner guide plate 9 may also be fixed in a plug-in detachable connection manner or a non-detachable connection manner.

[0093] In this embodiment, the radial outer end of the clamping jaw 1 is guided by the cooperation between the outer guide portion and the first guide groove 501, and the radial inner end is guided by the cooperation between the elongated hole 101 on the inner guide portion and the guide column 10, so that the clamping jaw 1 can stably perform linear motion along the radial direction of the set circle.

[0094] like Figure 4 and Figure 5 As shown, a clamping drive member 11 is provided on one axial side of the outer guide portion, and the clamping drive member 11 of each outer guide portion passes through the clamping drive disc 7 through a corresponding drive slot provided on the clamping drive disc 7 .

[0095] In this embodiment, Figure 8 As shown, the driving groove is a long groove, and the driving groove is inclined relative to the radial direction of the clamping driving disk 7, that is, the long axis of the driving groove is set at a set acute angle with the corresponding radial line of the clamping driving disk 7.

[0096] The two adjacent drive grooves are defined as a first drive groove 701 and a second drive groove 702. The inclination directions of the first drive groove 701 and the second drive groove 702 are opposite. There is a radial line for clamping the drive disk in the middle position between the first drive groove 701 and the second drive groove 702. The first drive groove 701 and the second drive groove 702 are mirror-symmetrically arranged relative to the radial line for clamping the drive disk.

[0097] With this arrangement, when the clamping drive plate 7 rotates about its axis, the clamping jaws 1, driven by the drive slots and the clamping drive member 11, move linearly along the radial direction of the outer guide plate 5. Because the two adjacent drive slots are symmetrically arranged about the clamping drive plate's radial axis midway between them, the two adjacent clamping jaws 1 move in opposite directions.

[0098] The clamping drive member 11 includes an internal threaded barrel 1101, the top of which is fixed to the bottom surface of the outer guide portion, the axis of which is perpendicular to the bottom surface of the outer guide portion, the internal threaded barrel 1101 passes through the driving groove, and the internal threaded barrel 1101 is threadedly connected to the bolt 1102.

[0099] Furthermore, to limit the radial movement of the clamping jaw 1, a bolt 1102 is slidably engaged with a first limiting groove 601 defined in the top surface of the fixing plate 6. The radial width of the first limiting groove 601 is greater than the outer diameter of the head of the bolt 1102, allowing the bolt 1102 to contact either the inner or outer annular groove surface of the first limiting groove 601, thereby limiting the radial outward and inward movement of the clamping jaw 1.

[0100] Preferably, the first limiting groove 601 is an annular groove coaxial with the fixed plate 6 to facilitate processing and manufacturing.

[0101] like Figures 9-11 As shown, the working method of the winding welding clamping mechanism of this embodiment is as follows:

[0102] Place the winding welding clamping mechanism and the winding 2 welding pair in place, wherein the winding 2 welding pair is placed in 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, which facilitates the placement of the welding pair in the clamping window 4.

[0103] Rotate the clamping drive disk 7. Under the action of the drive groove and the clamping drive member 11, all the 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 jaws 1 are opposite. The clamping surfaces of the clamping teeth 3 on both sides of the clamping window 4 approach each other, clamping and fixing the welding pair of the winding 2.

[0104] The clamping mechanism for winding welding of this embodiment overcomes the defects of the current winding clamping mechanism. Multiple clamping jaws 1 are arranged flush along the axial direction of a set circle, occupying a small space in the axial direction, making the clamping mechanism suitable for clamping and fixing MiNiPins with very small axial dimensions, thereby helping to reduce the axial height of the stator.

[0105] Example 2

[0106] This embodiment provides a positioning and fixing device for winding welding, which includes the clamping mechanism for winding welding of Example 1, and also includes a combing mechanism. The combing mechanism is used to circumferentially position and comb the winding 2 of the stator 12 before the winding is clamped and fixed using the clamping mechanism for winding welding. The combing mechanism is used in conjunction with the clamping mechanism for winding welding.

[0107] like Figure 12-15 As shown, the combing mechanism includes a combing guide disk 13, and 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.

[0108] In this embodiment, the combing guide disc 13 and the combing drive disc 14 both adopt an annular structure.

[0109] In this embodiment, the central axis of the combing mechanism and the clamping mechanism for winding welding are colinear, that is, the centers of the middle parts 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 all coaxially arranged with the set circle on which the multiple clamps 1 are distributed.

[0110] Specifically, the bottom surface of the combing guide disc 13 is provided with a circular groove that matches the combing drive disc 14. The combing drive disc 14 is located within the circular groove and is slidably connected to the side groove surface of the circular groove, thereby enabling the combing drive disc 14 to rotate about its own axis. The bottom surface of the combing guide disc 13 is provided with multiple stop plates at equal intervals along the circumference. The stop plates are fixedly connected to the combing guide disc 13 via bolts. The stop plates contact and slide with the bottom edge of the combing drive disc 14 to prevent the combing drive disc 14 from dislodging from the circular groove.

[0111] The combing guide disc 13 is slidably connected to a plurality of combing teeth 15 in radial direction. In this embodiment, the plurality of combing teeth 15 are distributed along the circumferential direction of the combing guide disc 13.

[0112] In this embodiment, the combing teeth 15 include a guide portion 1501, a tooth head 1502 and a connecting portion arranged between the guide portion 1501 and the tooth head 1502, wherein the inner end of the guide 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.

[0113] The guide portion 1501 is slidably connected to the combing guide disc 13. Specifically, a plurality of second guide grooves 1301 are circumferentially defined on one axial side surface of the combing guide disc 13. The second guide grooves 1301 are arranged radially along the combing guide disc 13, and the inner ends of the second guide grooves 1301 extend to the inner annular surface of the combing guide disc 13. The axial openings of the second guide grooves 1301 face the combing drive disc 14.

[0114] The guide portion 1501 is embedded in the second guide groove 1301 and is slidably connected to the groove surface of the second guide groove 1301 , thereby realizing the radial sliding connection between the combing teeth 15 and the combing guide disk 13 .

[0115] A combing tooth drive 16 is provided on the axial side of the guide portion 1501, distal from the combing guide disc 13. In this embodiment, the combing tooth drive 16 is a guide wheel rotatably connected to the bottom surface of the guide portion 1501. The guide wheel extends into a corresponding guide slot 1401 provided on the combing drive disc 14. In this embodiment, due to the long radial motion path of the combing teeth 15, the guide slots 1401 are elongated arcuate slots, arranged at an angle to the corresponding radial line of the combing drive disc.

[0116] With this arrangement, the combing drive disc 14 is rotated, and under the cooperation of the guide wheel and the guide groove 1401 , the combing teeth 15 can move linearly along the radial direction of the combing guide disc 13 .

[0117] In this embodiment, Figure 16As shown, a combing gap 17 is formed between the tooth heads 1502 of adjacent combing teeth 15 for accommodating windings in the same winding slot. The width of the tooth heads 1502 gradually decreases radially from the outside to the inside along the combing guide plate 13. As the tooth heads 1502 move from the outside to the inside, the gap between adjacent tooth heads 1502 gradually decreases until each row of windings 2 is securely clamped between two adjacent tooth heads 1502. This allows the ends of all windings 2 to be simultaneously circumferentially positioned in a single operation.

[0118] Furthermore, a drive plate is provided on the outer circumference of the combing drive disk 14, allowing a worker to manually rotate the combing drive disk 14 about its own axis via the drive plate. It is understood that the drive plate may also be connected to a power mechanism, which in turn drives the combing drive disk 14 about its own axis via the drive plate. The power mechanism may be a linear telescopic component such as a pneumatic cylinder or a hydraulic cylinder, and those skilled in the art may configure it according to actual needs.

[0119] Specifically, the telescopic part of the linear telescopic component is provided with a driving column, which extends into the long slide groove set in the driving plate. The driving column is slidingly connected to the long slide groove. The telescopic movement of the linear telescopic component can drive the combing drive disk to rotate around its own axis through the driving plate.

[0120] In order to limit the rotation angle of the combing drive disk 14, a second limiting groove is provided on the bottom surface of the combing guide disk 13. The driving plate extends into the second limiting groove, and the rotation angle of the combing drive disk 14 is limited by the second limiting groove.

[0121] The method of using the positioning and fixing device for winding welding of this embodiment is as follows:

[0122] First, the winding welding clamping mechanism is matched with the winding 2 to be welded, and the winding 2 to be welded is placed into the corresponding clamping window 4 .

[0123] At this time, the clamping mechanism for moving the winding welding and the winding to be welded are carried out to the combing station, such as Figure 17-18 As shown, the combing mechanism moves so that the combing mechanism cooperates with the winding 2, and then the combing drive disk 14 rotates, and the combing teeth 15 move radially toward the inside, using the tooth head 1502 to clamp the winding 2 and position the winding 2 circumferentially.

[0124] After positioning is completed, the combing mechanism is withdrawn, the clamping drive disc 7 rotates, and the adjacent clamping jaws 1 move in opposite directions along the radial direction, and the corresponding two clamping jaws 1 clamp and fix the welding pair of the winding.

[0125] At this time, the winding welding clamping mechanism and the winding to be welded are moved into the welding station, and the welding pair is welded using welding equipment. The welding equipment can adopt existing technology and will not be described in detail here.

[0126] In this embodiment of the positioning and fixing device, the combing mechanism circumferentially positions and combs the windings before the winding welding clamping mechanism clamps the windings. Before the winding welding clamping mechanism clamps the windings, the combing mechanism withdraws to leave a larger axial dimension of the exposed end pins for welding, thus facilitating the use of MiNiPins. The combing and positioning and fixing steps are completed in one step, eliminating the need to sequentially position multiple windings 2 one by one, resulting in high positioning efficiency.

[0127] Example 3

[0128] This embodiment provides a stator manufacturing method, which is performed using the winding welding positioning and fixing device of embodiment 2, and includes the following steps:

[0129] Each welding pair of the winding welding end is passed through the corresponding clamping window 4 in the clamping mechanism for winding welding.

[0130] The combing mechanism moves to the top of the winding welding and clamping mechanism and performs circumferential combing and positioning on each welding pair. The combing mechanism can be moved by the existing motion drive 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 Example 2, which will not be repeated here.

[0131] The driving mechanism drives the clamping jaws 1 to move, so that the radial size of the clamping window 4 is reduced to clamp and fix the welding pairs. After all welding pairs are clamped, the combing mechanism withdraws.

[0132] The winding welding clamping mechanism and the winding are moved to the welding station for welding of the welding pair.

[0133] After welding is completed, the driving mechanism drives the clamping jaw 1 to move, loosening the welding pair, and the clamping mechanism for winding welding and the winding welding end are released from the matching state.

[0134] The clamping mechanism for winding welding can be moved to the welding station using the existing conveying mechanism, which will not be described in detail here.

[0135] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A clamping mechanism for winding welding, characterized in that: It comprises a plurality of clamping jaws distributed along a set circumference, the plurality of clamping jaws are arranged flush along the axial direction of the set circumference, and a plurality of clamping teeth distributed along the radial direction are provided on both sides of the circumference of the clamping jaws; When the clamping mechanism for winding welding is in a clamping state, the circumferentially adjacent teeth of any two adjacent jaws are staggered in the radial direction so that all the teeth on the adjacent sides enclose a plurality of radially distributed clamping windows, each of which is used to accommodate a welding pair of the winding. The jaws are connected to a driving mechanism, which can drive the adjacent jaws to move in opposite directions along the radial direction of a set circumference to clamp or release the welding pair; The driving mechanism includes a clamping drive disk, an outer guide disk is provided on one axial side of the clamping drive disk, an outer guide portion is provided on the radial outer end of the clamping jaw, the outer guide portion is radially slidably connected to the outer guide disk, a clamping drive member is provided on one axial side of the outer guide portion, the clamping drive member passes through a drive groove provided on the clamping drive disk, the drive groove is inclined relative to the radial direction of the clamping drive disk, and the two adjacent drive grooves are symmetrical relative to the radial line of the clamping drive disk in the middle between the two.

2. The winding welding clamping mechanism according to claim 1, wherein: The surface of the clamping teeth used to cooperate with the welding pair is a clamping surface, and the clamping surface is at least partially arranged along the tangent direction of the set circumference.

3. The winding welding clamping mechanism according to claim 2, wherein: The clamping teeth further include an occlusal surface, wherein the extending directions of the occlusal surface and the clamping surface intersect with each other and the included angle is a set acute angle; The engaging surfaces of two circumferentially adjacent clamping teeth are parallel to each other.

4. The winding welding clamping mechanism according to claim 1, wherein: A fixed disk is provided on the other axial side of the clamping drive disk. One end of the clamping drive member is connected to the outer guide portion, and the other end extends into the first limiting groove provided on the fixed disk. The radial width of the first limiting groove is greater than the outer diameter of the other end of the clamping drive member.

5. The winding welding clamping mechanism according to claim 1, wherein: Also included is an inner guide disc coaxially arranged with the outer guide disc, the inner guide disc comprising a first inner guide disc and a second inner guide disc axially stacked and connected, with a plurality of axially extending guide posts arranged therebetween; An inner guide portion is provided at the radial inner end of the clamping jaw. The inner guide portion is provided with an elongated hole. The elongated hole is arranged along the movement direction of the clamping jaw. A guide column is slidably embedded in each elongated hole.

6. The winding welding clamping mechanism according to claim 1, wherein: The outer guide disc is provided with a first guide groove arranged in a radial direction, and the outer guide portion is slidably embedded in the first guide groove so that the outer guide portion is slidably connected to the outer guide disc.

7. Winding welding positioning and fixing device, characterized in that, The invention comprises the winding welding clamping mechanism according to any one of claims 1 to 6, and further comprises a combing mechanism for circumferentially positioning and combing the welding pair before the winding welding clamping mechanism clamps the welding pair.

8. The winding welding positioning and fixing device according to claim 7, characterized in that: The combing mechanism includes a combing guide disk, one side of which is coaxially connected to a combing drive disk, and the combing guide disk is radially slidingly connected to a plurality of combing teeth distributed along the circumferential direction. The outer end of the combing tooth is provided with a combing tooth drive member, and the combing tooth drive member extends into a guide groove provided on the combing drive disk. The inner end of the combing tooth is provided with a tooth head, and the width of the tooth head gradually decreases from the outside to the inside of the radial direction of the combing mechanism, so that a combing gap is formed between two adjacent tooth heads.

9. A method for manufacturing a stator, characterized in that: The winding welding positioning and fixing device according to claim 7 comprises the following steps: Pass each welding pair of the winding welding end through the corresponding clamping window in the winding welding clamping mechanism; The combing mechanism moves to the top of the clamping mechanism for winding welding and performs circumferential combing and positioning of each welding pair; The driving mechanism drives the clamping claw to move, so that the radial size of the clamping window is reduced to clamp the welding pairs, and after all welding pairs are clamped, the combing mechanism is withdrawn; The winding welding clamping mechanism and the winding are moved to the welding station for welding of the welding pair.

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