Positioning fixture and coil welding tooling

Abstract

The present application provides a positioning fixture and a coil welding tooling. The positioning fixture includes a first positioning disk and a second positioning disk. The first positioning disk is provided with a plurality of first positioning holes, and the second positioning disk is provided with a plurality of second positioning holes. The first positioning holes and the second positioning holes each include a large hole portion and a small hole portion. A first driving arm is provided on the first positioning disk, and a second driving arm is provided on the second positioning disk. The positioning fixture provided by the present application uses the first positioning disk with the first positioning holes to cooperate with the second positioning disk with the second positioning holes. After the first positioning disk and the second positioning disk are respectively driven by the first driving arm and the second driving arm to rotate a certain angle, the ends of the two coils inserted in the first positioning holes and the second positioning holes can be clamped from multiple directions of the cross-section through the small hole portions of the first positioning holes and the small hole portions of the second positioning holes, realizing pinching and accurate positioning, thereby solving the technical problems of the existing welding tooling having a complex structure and being difficult to achieve accurate positioning.

Description

Technical Field

[0001] This application belongs to the technical field of motor production equipment, and more specifically, relates to a positioning fixture and a coil welding tooling. Background Art

[0002] A hair-pin motor is a motor in which the shape of the coils of the stator winding resembles a hairpin. When manufacturing the stator of a hair-pin motor, it is necessary to first form the coils of the winding (made of flat wires) into a hairpin-like shape, then insert the coils into the prefabricated stator slots, and then weld the ends of the coils exposed outside the stator.

[0003] However, due to the gap between the ends of two adjacent coils in the same slot, it is difficult to directly connect the ends of the two coils during welding. Currently, the welding of the coil ends generally requires the assistance of welding tooling. Before welding, the ends of two adjacent coils are pinched together. However, the existing welding tooling has a complex structure and is difficult to achieve accurate positioning. Summary of the Invention

[0004] The purpose of this application is to provide a positioning fixture and a coil welding tooling, including but not limited to solving the technical problems of the existing welding tooling having a complex structure and being difficult to achieve accurate positioning.

[0005] To achieve the above purpose, an embodiment of this application provides a positioning fixture for a coil welding tooling. The positioning fixture includes a positioning seat, a limiting ring, a first positioning disk, and a second positioning disk. The positioning seat is provided with a through hole for the ends of the stator coils to pass through. The first positioning disk and the second positioning disk are coaxially stacked on one end face of the through hole. The limiting ring is installed on the positioning seat to limit the first positioning disk and the second positioning disk on the positioning seat.

[0006] The first positioning disk is provided with a plurality of first positioning holes for the ends of two adjacent coils in the same slot to pass through. The second positioning disk is provided with a plurality of second positioning holes for the ends of two adjacent coils in the same slot to pass through. The plurality of first positioning holes and the plurality of second positioning holes communicate with the through hole. The first positioning holes and the second positioning holes are in one-to-one correspondence. The inner contour of the first positioning holes is the same as the inner contour of the second positioning holes, and the orientation of the first positioning holes is opposite to the orientation of the second positioning holes. The first positioning holes and the second positioning holes respectively include a large hole portion and a small hole portion. The cross-sectional area of the small hole portion is smaller than the cross-sectional area of the large hole portion, and the cross-sectional width of the small hole portion is equal to the sum of the wire diameters of the ends of two adjacent coils in the same slot.

[0007] The first positioning disk is provided with a first driving arm for driving the first positioning disk to rotate about the axis, and the second positioning disk is provided with a second driving arm for driving the second positioning disk to rotate about the axis;

[0008] When controlling the first driving arm to drive the first positioning hole to move from one side of its small hole portion to the large hole portion side, and / or the second driving arm to drive the second positioning hole to move from one side of its small hole portion to the large hole portion side, the two coil ends penetrating through the small hole portions of the first positioning hole and the second positioning hole can be pinched by the cooperation of the small hole portions of the first positioning hole and the second positioning hole.

[0009] In some embodiments, the first positioning disk is further provided with a first locking tongue, and the second positioning disk is further provided with a second locking tongue. The first locking tongue and the second locking tongue are used to cooperate with a lock buckle to lock the first positioning disk and the second positioning disk.

[0010] In some embodiments, the positioning seat is provided with a spring lock buckle, and the spring lock buckle is locked with the first locking tongue and the second locking tongue.

[0011] In some embodiments, the positioning seat is further provided with a first accommodation groove extending axially, a second accommodation groove extending radially, a first avoidance groove extending radially, and a second avoidance groove extending radially. The first accommodation groove is arranged around the through port and communicated with the through port. The second accommodation groove, the first avoidance groove, and the second avoidance groove are arranged at intervals along the circumferential direction of the first accommodation groove and are respectively communicated with the first accommodation groove. The first positioning disk and the second positioning disk are accommodated in the first accommodation groove. The first driving arm passes through the first avoidance groove and extends out of the positioning seat. The second driving arm passes through the second avoidance groove and extends out of the positioning seat. The first locking tongue and the second locking tongue extend out of the limiting ring through the second accommodation groove, and the spring lock buckle is arranged in the second accommodation groove.

[0012] In some embodiments, the numbers of the first driving arm, the second driving arm, the first locking tongue, the second locking tongue, the spring lock buckle, the first avoidance groove, the second avoidance groove, and the second accommodation groove are all two.

[0013] In some embodiments, the end face of the limiting ring engaged with the positioning seat is provided with a third avoidance groove, a fourth avoidance groove, and a fifth avoidance groove. The position of the third avoidance groove corresponds to the position of the first avoidance groove, the position of the fourth avoidance groove corresponds to the position of the second avoidance groove, and the position of the fifth avoidance groove corresponds to the position of the second accommodation groove.

[0014] In some embodiments, rollers are respectively provided at one end of the first driving arm away from the first positioning disk and one end of the second driving arm away from the second positioning disk.

[0015] The embodiment of the present application also provides a coil welding tooling, which includes a pair of first support plates and the above-mentioned positioning fixture. Positioning pins are provided on the first support plates, and two third positioning holes are further opened in the positioning seat. The two third positioning holes can be respectively sleeved on the two positioning pins of a pair of the first support plates to fix the positioning fixture in the space between the pair of first support plates.

[0016] In some embodiments, the coil welding tooling further includes a first driving component, a second driving component, and a third driving component. The first driving component, the second driving component, and the third driving component are respectively installed on any one of the first support plates. The first driving component can be drivingly connected to the first driving arm, the second driving component can be drivingly connected to the second driving arm, and the third driving component can be drivingly connected to the spring lock.

[0017] In some embodiments, the coil welding tooling further includes a second support plate and a fourth driving component. The second support plate is located at the bottom side of the pair of first support plates for placing the stator, and the fourth driving component is drivingly connected to the second support plate for driving the second support plate to approach or move away from the first support plate.

[0018] The positioning fixture and the coil welding tooling provided by the embodiment of the present application adopt the cooperation of the first positioning disk with the first positioning hole and the second positioning disk with the second positioning hole. After the first driving arm and the second driving arm respectively drive the first positioning disk and the second positioning disk to rotate a certain angle, the ends of the two coils passing through the first positioning hole and the second positioning hole can be clamped from multiple directions of the cross-section through the small hole parts of the first positioning hole and the second positioning hole, realizing pinching and accurate positioning, thereby solving the technical problems of the existing welding tooling with complex structure and difficult accurate positioning, and being beneficial to improving the production efficiency of the hairpin motor. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a top view schematic diagram of the positioning fixture provided by the embodiment of the present application;

[0021] Figure 2 Schematic exploded perspective view of the positioning fixture provided by the embodiment of the present application;

[0022] Figure 3 is Figure 1 Enlarged schematic view of part A in;

[0023] Figure 4 Schematic working state view of the positioning fixture provided by the embodiment of the present application;

[0024] Figure 5 is Figure 4 Enlarged schematic view of part B in;

[0025] Figure 6 Schematic perspective view of the coil welding tooling provided by the embodiment of the present application;

[0026] Figure 7 Partial enlarged schematic view of the coil welding tooling provided by the embodiment of the present application;

[0027] Figure 8 Front view schematic view of the coil welding tooling in the working state provided by the embodiment of the present application.

[0028] Among them, each reference numeral in the figure:

[0029] 1—Coil welding tooling, 11—Positioning fixture, 12—First support plate, 13—First driving component, 14—Second driving component, 15—Third driving component, 16—Buffer component, 17—Second support plate, 18—Fourth driving component, 19—Fixing plate, 111—Positioning seat, 112—Limiting ring, 113—First positioning disk, 114—Second positioning disk, 115—First driving arm, 116—Second driving arm, 117—First locking tongue, 118—Second locking tongue, 119—Spring lock, 120—Positioning pin, 131—Pusher block, 132—Pusher block driving part, 151—Traction part, 152—Traction driving part, 161—Buffer, 162—Support seat, 181—Third support plate, 182—Lifting driving part, 183—Lead screw, 184—Drive belt, 190—Avoidance opening, 191—First support rod, 192—Second support rod, 1111—Through opening, 1112—First accommodation groove, 1113—First avoidance groove, 1114—Second avoidance groove, 1115—Second accommodation groove, 1116—Third positioning hole, 1121—Third avoidance groove, 1122—Fourth avoidance groove, 1123—Fifth avoidance groove, 1131—First positioning hole, 1132—First weight reduction hole, 1141—Second positioning hole, 1142—Second weight reduction hole, 1150—Roller, 1191—Shell, 1192—Fastening body, 1193—Cover body, 1194—Pull rod, 1195—Spring, 11411—Large hole part, 11412—Small hole part, W—Cross-sectional width of the small hole part;

[0030] 2—Stator, 20—End of the coil. Specific embodiments

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0032] Referring to "embodiment" or "embodiment" herein means that a specific feature, structure, or characteristic described in connection with the embodiment or embodiment may be included in at least one embodiment of the present application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly or implicitly understand that the embodiments described herein may be combined with other embodiments.

[0033] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0034] The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] The meaning of the term "plurality" is two or more, unless otherwise specifically defined.

[0036] Please refer to Figures 1 to 5, this application provides a positioning fixture 11 for a coil welding tooling. The positioning fixture 11 includes a positioning base 111, a limiting ring 112, a first positioning disk 113, and a second positioning disk 114. Among them, the positioning base 111 is provided with a through hole 1111 for the end 20 of the coil of the stator 2 to pass through. The first positioning disk 113 and the second positioning disk 114 are coaxially stacked on one end face of the through hole 1111. The limiting ring 112 is installed on the positioning base 111 to limit the first positioning disk 113 and the second positioning disk 114 on the positioning base 111. The first positioning disk 113 is provided with a plurality of first positioning holes 1131, and the second positioning disk 114 is provided with a plurality of second positioning holes 1141. The first positioning holes 1131 and the second positioning holes 1141 are used for the ends 20 of two adjacent coils in the same slot to pass through (as Figure 5 shown). The plurality of first positioning holes 1131 and the plurality of second positioning holes 1141 communicate with the through hole 1111. The first positioning holes 1131 and the second positioning holes 1141 are in one-to-one correspondence. The inner contour of the first positioning hole 1131 is the same as the inner contour of the second positioning hole 1141, and the orientation of the first positioning hole 1131 is opposite to the orientation of the second positioning hole 1141. The first positioning holes 1131 and the second positioning holes 1141 respectively include a large hole portion 11411 and a small hole portion 11412. The cross-sectional area of the small hole portion 11412 is smaller than the cross-sectional area of the large hole portion 11411, and the cross-sectional width W of the small hole portion is equal to the sum of the wire diameters of the ends 20 of two adjacent coils in the same slot. A first driving arm 115 is arranged on the first positioning disk 113. The first driving arm 115 is used to drive the first positioning disk 113 to rotate around the axis of the first positioning disk 113. At the same time, a second driving arm 116 is arranged on the second positioning disk 114. The second driving arm 116 is used to drive the second positioning disk 114 to rotate around the axis of the second positioning disk 114.

[0037] When controlling the first driving arm 115 to drive the first positioning hole 1131 to move from one side of its small hole portion to the large hole portion side, and / or the second driving arm 116 to drive the second positioning hole 1141 to move from one side of its small hole portion to the large hole portion side, the ends 20 of the two coils passing through the first positioning hole 1131 and the second positioning hole 1141 can be pinched by the cooperation of the small hole portions of the first positioning hole 1131 and the second positioning hole 1141.

[0038] Specifically, the through-hole 1111 penetrates the positioning seat 111, and the two end faces of the through-hole 1111 are respectively the top surface and the bottom surface of the positioning seat 111; the first positioning disk 113 and the second positioning disk 114 are coaxially stacked on the top surface or the bottom surface of the positioning seat 111 and cover the through-hole 1111; the limiting ring 112 is fixedly connected to the top surface or the bottom surface of the positioning seat 111 by a fastener and can limit the first positioning disk 113 and the second positioning disk 114 on the positioning seat 111; the first positioning disk 113 and the second positioning disk 114 are respectively disks, the first positioning disk 113 is provided with a plurality of coaxial first positioning hole circles, each first positioning hole circle includes a plurality of first positioning holes 1131 arranged at equal intervals along the same circle, the second positioning disk 114 is provided with a plurality of coaxial second positioning hole circles, each second positioning hole circle includes a plurality of second positioning holes 1141 arranged at equal intervals along the same circle. If the first positioning holes 1131 are arranged clockwise, the second positioning holes 1141 are arranged counterclockwise. If the first positioning holes 1131 are arranged counterclockwise, the second positioning holes 1141 are arranged clockwise. When the orthographic projections of the position-corresponding first positioning holes 1131 and second positioning holes 1141 overlap, the large-hole part of the first positioning hole 1131 is axially aligned with the small-hole part 11412 of the second positioning hole 1141, and the small-hole part of the first positioning hole 1131 is axially aligned with the large-hole part 11411 of the second positioning hole 1141. In the same positioning hole, there is a smooth transition between the large-hole part 11411 and the small-hole part 11412; the first driving arm 115 is fixedly connected to the flange of the first positioning disk 113, and the second driving arm 116 is fixedly connected to the flange of the second positioning disk 114; when controlling the first driving arm 115 to drive the first positioning hole 1131 to move from one side of its small-hole part to the large-hole part side, and / or the second driving arm 116 to drive the second positioning hole 1141 to move from one side of its small-hole part to the large-hole part side, the small-hole part of the first positioning hole 1131 approaches the small-hole part 11412 of the second positioning hole 1141, and the large-hole part of the first positioning hole 1131 moves away from the large-hole part 11411 of the second positioning hole 1141. Finally, the ends 20 of the two coils inserted in the first positioning hole 1131 and the second positioning hole 1141 will be clamped in the small-hole part of the first positioning hole 1131 and the small-hole part 11412 of the second positioning hole 1141 to achieve pinching.

[0039] The positioning fixture 11 provided by the present application uses a first positioning disk 113 with a first positioning hole 1131 and a second positioning disk 114 with a second positioning hole 1141 in cooperation. After the first driving arm 115 and the second driving arm 116 respectively drive the first positioning disk 113 and the second positioning disk 114 to rotate a certain angle, the end portions 20 of the two coils disposed in the first positioning hole 1131 and the second positioning hole 1141 can be clamped from multiple directions of the cross section through the small hole portions of the first positioning hole 1131 and the small hole portion 11412 of the second positioning hole 1141, so as to achieve kneading and accurate positioning, thereby solving the technical problems of the existing welding tooling having a complex structure and being difficult to achieve accurate positioning, and being beneficial to improving the production efficiency of the hairpin motor.

[0040] Optionally, please refer to Figure 2 , as a specific embodiment of the positioning fixture provided by the present application, in order to reduce the weight of the positioning fixture 11, a first weight-reducing hole 1132 is provided in the middle of the first positioning disk 113, and / or a second weight-reducing hole 1142 is provided in the middle of the second positioning disk 114. Specifically, a plurality of first positioning hole circles are arranged around the first weight-reducing hole 1132, and a plurality of second positioning hole circles are arranged around the second weight-reducing hole 1142.

[0041] Optionally, please refer to Figure 2 , as a specific embodiment of the positioning fixture provided by the present application, rollers 1150 are respectively provided at one ends of the first driving arm 115 away from the first positioning disk 113 and the second driving arm 116 away from the second positioning disk 114. That is, rollers 1150 are respectively provided at the ends of the first driving arm 115 extending outside the positioning seat 111 and the second driving arm 116 extending outside the positioning seat 111. The rollers 1150 are used for rolling connection with the push block 131 (as shown in Figure 7 ), which can reduce the friction between the push block 131 and the first driving arm 115 or the second driving arm 116, and is beneficial to promoting the rotation of the first positioning disk 113 and the second positioning disk 114 around the axis of the through hole 1111.

[0042] Optionally, please refer to Figure 2, as a specific embodiment of the positioning fixture provided in the present application, the positioning seat 111 is further provided with a first accommodating groove 1112, a second accommodating groove 1115, a first avoiding groove 1113 and a second avoiding groove 1114. The first accommodating groove 1112 extends along the axial direction of the positioning seat 111, and the second accommodating groove 1115, the first avoiding groove 1113 and the second avoiding groove 1114 extend along the radial direction of the positioning seat 111 respectively. The first accommodating groove 1112 is arranged around the through hole 1111 and communicates with the through hole 1111. The second accommodating groove 1115, the first avoiding groove 1113 and the second avoiding groove 1114 are arranged at intervals along the circumferential direction of the first accommodating groove 1112 and communicate with the first accommodating groove 1112 respectively. The first positioning disk 113 and the second positioning disk 114 are accommodated in the first accommodating groove 1112. The first driving arm 115 passes through the first avoiding groove 1113 and extends outside the positioning seat 111, and the second driving arm 116 passes through the second avoiding groove 1114 and extends outside the positioning seat 111. Specifically, the first accommodating groove 1112, the second accommodating groove 1115, the first avoiding groove 1113 and the second avoiding groove 1114 are located on the same surface of the positioning seat 111. The first accommodating groove 1112 is an annular groove surrounding the periphery of one end of the through hole 1111, providing a space for accommodating the first positioning disk 113 and the second positioning disk 114. When the first positioning disk 113 and the second positioning disk 114 are coaxially stacked in the first accommodating groove 1112, the edge of the first positioning disk 113 overlaps on the bottom of the first accommodating groove 1112, and the second positioning disk 114 overlaps on the first positioning disk 113. The first positioning hole 1131 communicates with the through hole 1111, and the second positioning hole 1141 communicates with the through hole 1111 through the first positioning hole 1131. The first avoiding groove 1113 and the second avoiding groove 1114 penetrate the groove wall of the first accommodating groove 1112 along the radial direction of the positioning seat 111 respectively, providing a space for the first driving arm 115 and the second driving arm 116 to pass through the positioning seat 111.

[0043] Optionally, please refer to Figure 1 and Figure 2, as a specific embodiment of the positioning fixture provided in the present application, a first locking tongue 117 is further provided on the first positioning disk 113, and a second locking tongue 118 is further provided on the second positioning disk 114. The first locking tongue 117 and the second locking tongue 118 extend out of the limiting ring 112 through the second accommodating groove 1115 and are used to cooperate with a buckle to lock the first positioning disk 113 and the second positioning disk 114. Specifically, the positioning seat 111 includes an annular body and a protruding portion. The protruding portion protrudes on the outer peripheral surface of the annular body. The second accommodating groove 1115 penetrates the groove wall of the first accommodating groove 1112 and the protruding portion along the radial direction of the positioning seat 111. When the first positioning disk 113 and the second positioning disk 114 are coaxially stacked in the first accommodating groove 1112, the first locking tongue 117 and the second locking tongue 118 respectively extend into the second accommodating groove 1115, and the end of the first locking tongue 117 away from the first positioning disk 113 and the end of the second locking tongue 118 away from the second positioning disk 114 are exposed outside the limiting ring 112. When replacing the stator 2 (as shown in Figure 4 ), a buckle can be used to clamp the first locking tongue 117 and the second locking tongue 118, so that the overlapping area of the orthographic projection of the first positioning hole 1131 and the orthographic projection of the second positioning hole 1141 is maximized, thereby facilitating the end 20 of the coil to extend into or withdraw from the first positioning hole 1131 and the second positioning hole 1141, which is beneficial to ensuring the smooth replacement of the stator 2.

[0044] Optionally, please refer to Figure 2, as a specific embodiment of the positioning fixture provided in this application, a spring lock 119 is provided on the positioning base 111, and the spring lock 119 is locked with the first locking tongue 117 and the second locking tongue 118. Specifically, the spring lock 119 is accommodated in the second accommodation groove 1115, and the spring lock 119 includes a housing 1191, a buckle body 1192, a cover body 1193, a pull rod 1194 and a spring 1195. Among them, the housing 1191 is fixedly installed in the second accommodation groove 1115, and the housing 1191 is provided with a through groove; one end of the buckle body 1192 is accommodated in the through groove of the housing 1191, and the other end of the buckle body 1192 is provided with a locking opening, and the cross-sectional area of the locking opening gradually increases from the side close to the housing 1191 to the side away from the housing 1191. The end of the first locking tongue 117 away from the first positioning disc 113 and the end of the second locking tongue 118 away from the second positioning disc 114 extend into the locking opening of the buckle body 1192; the cover body 1193 is fixedly installed on the housing 1191 and covers the opening of the through groove away from the locking opening of the buckle body 1192; the pull rod 1194 is inserted through the cover body 1193, and one end of the pull rod 1194 extends into the through groove of the housing 1191 and is fixedly connected to the buckle body 1192, and the other end of the pull rod 1194 extends outside the positioning base 111; the spring 1195 is accommodated in the through groove of the housing 1191, and both ends of the spring 1195 are respectively in contact with the buckle body 1192 and the cover body 1193. The number of springs 1195 can be one or two. When the number of springs 1195 is one, the spring 1195 is sleeved on the end of the pull rod 1194 extending into the through groove. When the number of springs 1195 is two, the two springs 1195 are respectively located on both sides of the pull rod 1194. When it is necessary to unlock the first positioning disc 113 and the second positioning disc 114, only need to pull the end of the pull rod 1194 extending outside the housing 1191 to the side away from the buckle body 1192, and the pull rod 1194 will pull the buckle body 1192 to move to the side away from the first locking tongue 117 and the second locking tongue 118, so that a moving space is left on the side of the first locking tongue 117 away from the second locking tongue 118 and the side of the second locking tongue 118 away from the first locking tongue 117, so that the first positioning disc 113 can rotate a certain angle around the axis of the positioning base 111 to the side away from the second locking tongue 118, and the second positioning disc 114 can rotate a certain angle around the axis of the positioning base 111 to the side away from the first locking tongue 117; when the external force applied to the pull rod 1194 is removed, the buckle body 1192 will move to the side close to the first locking tongue 117 and the second locking tongue 118 under the elastic force of the spring 1195, and push the first locking tongue 117 and the second locking tongue 118 to move towards each other through the two inner walls of the locking opening arranged opposite to each other until the first locking tongue 117 abuts against the second locking tongue 118, realizing the locking of the first positioning disc 113 and the second positioning disc 114, so as to maximize the overlapping area of the orthographic projection of the first positioning hole 1131 and the orthographic projection of the second positioning hole 1141.

[0045] Optionally, please refer to Figure 2 , as a specific embodiment of the positioning fixture provided in the present application, the number of the first driving arms 115, the number of the second driving arms 116, the number of the first locking tongues 117, the number of the second locking tongues 118, the number of the spring latches 119, the number of the first avoidance grooves 1113, the number of the second avoidance grooves 1114, and the number of the second accommodation grooves 1115 are each two. Specifically, the two first driving arms 115 are arranged at intervals and located on a straight line perpendicular to the axis of the first positioning disk 113, the two second driving arms 116 are arranged at intervals and located on a straight line perpendicular to the axis of the second positioning disk 114, the two first locking tongues 117 are arranged at intervals and located on a straight line perpendicular to the axis of the first positioning disk 113, the two second locking tongues 118 are arranged at intervals and located on a straight line perpendicular to the axis of the second positioning disk 114, the first avoidance groove 1113, the second avoidance groove 1114, and the second accommodation groove 1115 are arranged at intervals around the axis of the positioning seat 111 in sequence, and the first driving arm 115, the second driving arm 116, the first locking tongue 117, the second locking tongue 118, the spring latch 119, the first avoidance groove 1113, the second avoidance groove 1114, and the second accommodation groove 1115 correspond to each other one by one, which is beneficial to improving the stability when the first positioning disk 113 and the second positioning disk 114 rotate and lock.

[0046] Optionally, please refer to Figure 2 , as a specific embodiment of the positioning fixture provided in the present application, the end face where the limiting ring 112 is joined to the positioning seat 111 is provided with a third avoidance groove 1121, a fourth avoidance groove 1122, and a fifth avoidance groove 1123. Among them, the position of the third avoidance groove 1121 corresponds to the position of the first avoidance groove 1113, the position of the fourth avoidance groove 1122 corresponds to the position of the second avoidance groove 1114, and the position of the fifth avoidance groove 1123 corresponds to the position of the second accommodation groove 1115. That is, the third avoidance groove 1121 and the first avoidance groove 1113 can be combined into an avoidance hole for the first driving arm 115 to pass through, the fourth avoidance groove 1122 and the second avoidance groove 1114 can be combined into an avoidance hole for the second driving arm 116 to pass through, and the fifth avoidance groove 1123 and the second accommodation groove 1115 can be combined into an avoidance hole for the first locking tongue 117 and the second locking tongue 118 to pass through, which is beneficial to reducing the thickness of the positioning seat 111 and increasing the structural strength of the limiting ring 112.

[0047] Please refer to Figures 6 to 8, the present application further provides a coil welding tooling 1. The coil welding tooling 1 includes a pair of first support plates 12 and the positioning fixture 11 provided in the above embodiment. Among them, positioning pins 120 are provided on each first support plate 12. At the same time, two third positioning holes 1116 are also formed in the positioning seat 111 of the positioning fixture 11. The two third positioning holes 1116 can be respectively sleeved on the two positioning pins 120 of the pair of first support plates 12, so as to fixedly install the positioning fixture 11 in the space between the pair of first support plates 12. It can be understood that the space between the pair of first support plates 12 is used to avoid the stator 2.

[0048] For the coil welding tooling 1 provided in the present application, the positioning pin 120 is matched with the third positioning hole 1116, so that the positioning fixture 11 can be quickly and accurately fixedly installed in the space between the pair of first support plates 12, which is beneficial to improving the replacement efficiency of the positioning fixture 11.

[0049] Optionally, please refer to Figure 7, as a specific embodiment of the coil welding tooling provided in this application, the coil welding tooling 1 further includes a first driving component 13, a second driving component 14, and a third driving component 15. Among them, the first driving component 13, the second driving component 14, and the third driving component 15 are respectively installed on any one of the first support plates 12. The first driving component 13 can be drivingly connected to the first driving arm 115, the second driving component 14 can be drivingly connected to the second driving arm 116, and the third driving component 15 can be drivingly connected to the spring lock 119. Specifically, the first driving component 13 corresponds to the first driving arm 115 one by one, the second driving component 14 corresponds to the second driving arm 116 one by one, and the third driving component 15 corresponds to the spring lock 119 one by one. In an embodiment where the first driving arm 115, the second driving arm 116, and the spring lock 119 are each one, the first driving component 13 can be installed on any one of the first support plates 12, the second driving component 14 can be installed on any one of the first support plates 12, and the third driving component 15 can be installed on any one of the first support plates 12. In an embodiment where the first driving arm 115, the second driving arm 116, and the spring lock 119 are each two, one first driving component 13, one second driving component 14, and one third driving component 15 are installed on each first support plate 12; the first driving component 13 includes a push block 131 and a push block driving member 132. The push block driving member 132 can be a cylinder or an electric cylinder, etc. The push block 131 is slidably connected to the first support plate 12 and is fixedly connected to the driving rod of the push block driving member 132. When the push block driving member 132 is controlled to start, the push block driving member 132 will drive the push block 131 to slide and push the first driving arm 115 to drive the first positioning disk 113 to rotate a certain angle around the axis of the positioning seat 111; the structure of the second driving component 14 is the same as that of the first driving component 13, and the specific structure and working principle of the second driving component 14 will not be elaborated here; the third driving component 15 includes a traction member 151 and a traction driving member 152. The traction driving member 152 can be a cylinder or an electric cylinder, etc. The traction member 151 is fixedly connected to the driving rod of the traction driving member 152, and a third accommodation groove is provided at the end of the traction member 151 away from the traction driving member 152. When the positioning fixture 11 is fixedly installed on the first support plate 12, the end of the pull rod 1194 of the spring lock 119 extending outside the housing 1191 will be accommodated in the third accommodation groove. When the traction driving member 152 is controlled to start, the traction driving member 152 will drive the traction member 151 to move toward the side close to the traction driving member 152, and pull the pull rod 1194 of the spring lock 119 to drive the buckle body 1192 to move away from the first locking tongue 117 and the second locking tongue 118, realizing the unlocking of the first positioning disk 113 and the second positioning disk 114.

[0050] It should be noted that the "sliding" or "sliding connection" mentioned in this embodiment can be optionally achieved by the cooperation of a guide rail and a slider. Among them, the guide rail is fixedly installed on the first support plate 12, and the slider is fixedly installed on the push block 131.

[0051] Optionally, please refer to Figure 7 , as a specific embodiment of the coil welding tooling provided by this application, the coil welding tooling 1 further includes a buffer assembly 16 for buffering the impact of the push block 131. Specifically, the buffer assembly 16 includes a buffer 161 and a support seat 162. The support seat 162 is fixedly installed on the first support plate 12. The buffer 161 can be a spring buffer or a clay buffer, etc., and is fixedly installed on the support seat 162, and the buffer head of the buffer 161 faces the push block 131. When the push block 131 is about to touch the first driving arm 115 or the second driving arm 116 under the drive of the push block driving member 132, the push block 131 will abut against the buffer head of the buffer 161 to achieve deceleration before touching the first driving arm 115 or the second driving arm 116, effectively avoiding rigid contact between the push block 131 and the first driving arm 115 or the second driving arm 116. It can be understood that the first driving assembly 13 cooperates with the buffer assembly 16 one-to-one, and the second driving assembly 14 cooperates with the buffer assembly 16 one-to-one.

[0052] Optionally, please refer to Figure 6 and Figure 8, as a specific embodiment of the coil welding tooling provided in this application, the coil welding tooling 1 further includes a second support plate 17 and a fourth driving assembly 18. Among them, the second support plate 17 is located on the bottom side of a pair of first support plates 12 and is used for placing the stator 2. The fourth driving assembly 18 is drivingly connected to the second support plate 17 and is used to drive the second support plate 17 to approach or move away from the first support plate 12. Specifically, the coil welding tooling 1 further includes a fixing plate 19, four first support rods 191 and four second support rods 192. Each first support plate 12 is fixedly connected to the fixing plate 19 through two first support rods 191. The four first support rods 191 pass through the second support plate 17, and the second support plate 17 is slidably connected to the first support rods 191 through bushings; the fourth driving assembly 18 includes a third support plate 181, a lifting driving member 182, two lead screws 183 and two drive belts 184. Among them, the third support plate 181 is fixedly connected to the second support plate 17 through four second support rods 192. The four second support rods 192 pass through the fixing plate 19, and the fixing plate 19 is slidably connected to the second support rods 192 through bushings. The lifting driving member 182 is a motor and is installed on the surface of the third support plate 181 close to the fixing plate 19. An avoidance opening 190 is formed at the position of the fixing plate 19 corresponding to the lifting driving member 182. The two lead screws 183 are respectively passed through the fixing plate 19, and the two lead screws 183 are located on opposite sides of the lifting driving member 182. The two ends of each lead screw 183 are respectively rotatably connected to the second support plate 17 and the third support plate 181, and each lead screw 183 is drivingly connected to the driving shaft of the lifting driving member 182 through a drive belt 184. When the lifting driving member 182 is controlled to start, the lifting driving member 182 will drive the lead screw 183 to rotate through the drive belt 184. During the rotation of the lead screw 183, the second support plate 17 will be driven to rise along the first support rod 191, and the second support plate 17 will pull the third support plate 181 to rise synchronously through the second support rod 192, so as to lift the stator 2 placed on the second support plate 17 until the end 20 of the coil of the stator 2 passes through the first positioning hole 1131 of the first positioning plate 113 and the second positioning hole 1141 of the second positioning plate 114.

[0053] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A positioning fixture for a coil welding tooling, Characterized in that, the positioning fixture includes a positioning seat, a limiting ring, a first positioning disc and a second positioning disc. The positioning seat is provided with a through hole for the end of the stator coil to pass through. The first positioning disc and the second positioning disc are coaxially stacked on one end face of the through hole. The limiting ring is installed on the positioning seat to limit the first positioning disc and the second positioning disc on the positioning seat; the first positioning disc is provided with a plurality of first positioning holes for two adjacent coil ends in the same slot to pass through. The second positioning disc is provided with a plurality of second positioning holes for two adjacent coil ends in the same slot to pass through. The plurality of first positioning holes and the plurality of second positioning holes communicate with the through hole. The first positioning holes and the second positioning holes are in one-to-one correspondence. The inner contour of the first positioning hole is the same as the inner contour of the second positioning hole, and the orientation of the first positioning hole is opposite to the orientation of the second positioning hole. The first positioning hole and the second positioning hole respectively include a large hole part and a small hole part. The cross-sectional area of the small hole part is smaller than the cross-sectional area of the large hole part, and the cross-sectional width of the small hole part is equal to the sum of the wire diameters of two adjacent coil ends in the same slot; the first positioning disc is provided with a first driving arm for driving the first positioning disc to rotate around the axis. The second positioning disc is provided with a second driving arm for driving the second positioning disc to rotate around the axis; when controlling the first driving arm to drive the first positioning hole to move from one side of its small hole part to the large hole part side, and / or the second driving arm to drive the second positioning hole to move from one side of its small hole part to the large hole part side, the two coil ends passing through the first positioning hole and the second positioning hole can be pinched by the cooperation of the small hole parts of the first positioning hole and the second positioning hole; the first positioning disc is further provided with a first locking tongue, and the second positioning disc is further provided with a second locking tongue. The first locking tongue and the second locking tongue are used to cooperate with a lock buckle to lock the first positioning disc and the second positioning disc; A first weight-reducing hole is provided in the middle of the first positioning disc; the positioning seat is provided with a spring lock buckle, and the spring lock buckle is locked with the first locking tongue and the second locking tongue; the positioning seat is further provided with a first accommodating groove extending axially, a second accommodating groove extending radially, a first avoiding groove extending radially and a second avoiding groove extending radially. The first accommodating groove surrounds the through hole and communicates with the through hole. The second accommodating groove, the first avoiding groove and the second avoiding groove are circumferentially spaced along the first accommodating groove and communicate with the first accommodating groove respectively; The first positioning disc and the second positioning disc are accommodated in the first accommodating groove. The first driving arm passes through the first avoiding groove and extends out of the positioning seat. The second driving arm passes through the second avoiding groove and extends out of the positioning seat. The first locking tongue and the second locking tongue extend out of the limiting ring through the second accommodating groove. The spring lock buckle is arranged in the second accommodating groove.

2. The positioning fixture according to claim 1, It is characterized in that the numbers of the first driving arms, the second driving arms, the first locking tongues, the second locking tongues, the spring latches, the first avoidance grooves, the second avoidance grooves and the second accommodation grooves are each two.

3. The positioning fixture according to claim 1, It is characterized in that the end face where the limiting ring is joined to the positioning seat is provided with a third avoidance groove, a fourth avoidance groove and a fifth avoidance groove. The position of the third avoidance groove corresponds to the position of the first avoidance groove, the position of the fourth avoidance groove corresponds to the position of the second avoidance groove, and the position of the fifth avoidance groove corresponds to the position of the second accommodation groove.

4. The positioning fixture according to any one of claims 1 to 3, It is characterized in that rollers are respectively provided at one ends of the first driving arm away from the first positioning disk and the second driving arm away from the second positioning disk.

5. A coil welding tooling, It is characterized in that it includes a pair of first support plates and the positioning fixture according to any one of claims 1 to 3. Positioning pins are provided on the first support plates. The positioning seat is further provided with two third positioning holes, and the two third positioning holes can be respectively sleeved on the two positioning pins of the pair of first support plates to fix the positioning fixture in the space between the pair of first support plates.

6. The coil welding tooling according to claim 5, It is characterized in that it further includes a first driving component, a second driving component and a third driving component. The first driving component, the second driving component and the third driving component are respectively installed on any one of the first support plates. The first driving component can be drivingly connected to the first driving arm, the second driving component can be drivingly connected to the second driving arm, and the third driving component can be drivingly connected to the spring latch.

7. The coil welding tooling according to claim 6, It is characterized in that it further includes a second support plate and a fourth driving component. The second support plate is located at the bottom side of the pair of first support plates for placing the stator, and the fourth driving component is drivingly connected to the second support plate for driving the second support plate to approach or move away from the first support plate.

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