Welding clamping device and welding equipment

Abstract

The invention relates to the technical field of stator welding, and provides a welding clamping device and welding equipment. The welding clamping device comprises an assembly base, a positioner and a clamping matching mechanism; the positioner comprises a fixing plate, a connecting plate used for being placed in an inner hole of the stator core and a clamping arm extending from the fixing plate to the connecting plate. The clamping matching mechanism comprises a clamping matching arm which is used for enclosing with the clamping arm to form a clamping window for placing the end parts of two electric conductors to be welded in the winding; the driving assembly is used for driving the clamping matching arm to move relative to the clamping arm along a displacement direction which forms a preset included angle with the extension direction of the clamping matching arm, and clamping the end parts of two electric conductors to be welded in the winding from two radial sides and two circumferential sides of the stator iron core; and the driving component is supported on the assembling seat and is connected with the clamping matching arm. Compared with the prior art, light leakage caused by an overlarge gap between the side wall of the electric conductor and the clamp during welding is avoided, and the welding quality is improved.

Description

Technical Field

[0001] This invention relates to the technical field of stator welding, and in particular to a welding clamping device and welding equipment. Background Technology

[0002] Laser welding of flat wire motors is a method of welding flat wire motors using laser technology. Laser welding has the advantages of fast welding speed, high efficiency, easy focusing and alignment of laser beam, and strong adaptability. It can achieve precise welding of the stator of flat wire motors, improve welding speed and product quality, and has wide applications in electric vehicles, industrial fields and other fields.

[0003] Currently, in the welding process of flat wire motors, welding clamping fixtures are needed to hold the pairs to be welded in the windings. Traditional clamping fixtures can only clamp the ends of the conductors in the windings in one direction. Therefore, the gap between the conductors and the clamping fixtures is relatively large, which easily leads to light leakage and damage to the paint during welding, thus affecting the welding quality. Summary of the Invention

[0004] One objective of this invention is to provide a welding clamping device to solve the technical problem in the prior art where the clamping effect of electrical conductors during welding is not ideal and light leakage is easy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding clamping device, comprising an assembly base and a locator and a clamping engagement mechanism respectively mounted on the assembly base; the locator includes a fixing plate fixed on the assembly base, a connecting plate for insertion into the inner hole of the stator core, and at least one clamping arm extending from the fixing plate to the connecting plate; the clamping engagement mechanism includes: at least one clamping engagement arm for forming a clamping window with the at least one clamping arm, for inserting the ends of two electrical conductors to be welded in the winding; and a driving assembly for driving the clamping engagement arm to move relative to the clamping arm in a displacement direction at a preset angle to the extension direction of the clamping engagement arm, and clamping the ends of the two electrical conductors to be welded in the winding from both radial and circumferential sides of the stator core.

[0006] The technical solution of the present invention has the following advantages: The welding clamping device includes a mounting base, a locator, and a clamping engagement mechanism. The locator includes a fixing plate, a connecting plate, and a clamping arm extending from the fixing plate to the connecting plate. The clamping engagement mechanism includes a clamping engagement arm and a driving assembly. The clamping engagement arm is used to form a clamping window with the clamping arm for inserting the ends of the two electrical conductors to be welded in the winding. The driving assembly is used to drive the clamping engagement arm to move relative to the clamping arm in a displacement direction at a preset angle with the extension direction of the clamping engagement arm, and clamp the winding from both radial and circumferential sides of the stator core. The ends of the two conductors to be welded in the group are clamped together. Under the drive of the drive assembly, the clamping arm can move relative to the clamping arm in a displacement direction at a preset angle with the extension direction of the clamping arm. When moving toward the clamping arm, it can form a clamping window with the clamping arm and clamp the ends of the two conductors to be welded in the winding from both radial and circumferential sides of the stator core. This eliminates the gap between the side wall of the conductor and the clamping window, so as to avoid the situation where the side wall of the conductor and the clamp are too large, causing light leakage during welding and damage to the insulation film, and improves the welding quality.

[0007] In some embodiments, the drive assembly includes a clamping power member having a drive shaft connected to at least one clamping arm and movable in the extension direction of the clamping arm, and a guide member capable of moving at least one clamping arm in the displacement direction; both the guide member and the clamping power member are supported on the mounting base.

[0008] In some embodiments, at least one clamping arm is equipped with a roller, and a guide groove is formed on the guide member for inserting the roller, the guide groove extending in the displacement direction.

[0009] In some embodiments, the drive assembly further includes a transition push-pull component that extends along the extension direction of the clamping arm and is fixedly connected to the drive shaft, and at least one clamping arm is connected to the transition push-pull component and is movable relative to the transition push-pull component.

[0010] In some embodiments, at least one clamping arm has a protrusion, and the transition push-pull component has a groove for sliding the protrusion, the groove extending in a direction perpendicular to the extension direction of the clamping arm.

[0011] In some embodiments, at least one clamping arm includes a clamping arm body extending from a fixed plate to a connecting plate and a positioning protrusion protruding on a side wall of the clamping arm body. The side wall of the clamping arm body is provided with a first positioning surface for abutting against the side surfaces of the ends of two electrical conductors. The positioning protrusion has a second positioning surface for abutting against the side surfaces of the ends of the electrical conductors, and the second positioning surface is adjacent to the first positioning surface. At least one clamping mating arm includes a clamping mating arm body located on one side of the first positioning surface of the clamping arm body. A clamping protrusion is formed on the side wall of the clamping mating arm body. The clamping arm body, the positioning protrusion, the clamping mating arm body, and the clamping protrusion together form a clamping window. The side wall of the clamping mating arm body facing the first positioning surface is provided with a third positioning surface for abutting against the side surfaces of the ends of two electrical conductors. The side of the clamping protrusion facing the second positioning surface has a fourth positioning surface for abutting against the side surfaces of the ends of the electrical conductors.

[0012] In some embodiments, an extension is formed at the end of the clamping arm body away from the drive assembly, and a positioning protrusion has a contact surface that abuts against the extension. After the clamping protrusion is enclosed to form a clamping window, it abuts against the first positioning surface of the clamping arm body.

[0013] In some embodiments, the clamping protrusion has a clearance ramp that extends obliquely from the side wall of the clamping arm body toward the first positioning surface and toward the second positioning surface to the fourth positioning surface.

[0014] In some embodiments, the fixing plate is fan-shaped, and there are three clamping arms. The three clamping arms are arranged at equal angles around the center of the fixing plate and extend from the fixing plate to the connecting plate. There are three clamping mating arms, which correspond one-to-one with the three clamping arms.

[0015] Another objective of this invention is to provide a welding device that solves the technical problems of poor welding effect and low welding quality in the prior art.

[0016] To achieve this objective, the present invention provides a welding apparatus including a stator base for fixing a stator, wherein at least one of the aforementioned welding clamping devices is disposed around the periphery of the stator base.

[0017] This welding equipment, employing the aforementioned welding clamping device, offers advantages such as stable welding, excellent welding results, and high welding quality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the welding clamping device and stator provided in an embodiment of the present invention; Figure 2 This is a top view of the welding clamping device and stator provided in an embodiment of the present invention; Figure 3This is a three-dimensional schematic diagram of the welding clamping device provided in an embodiment of the present invention; Figure 4 This is an exploded view of the welding clamping device provided in an embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of the welding clamping device provided in an embodiment of the present invention; Figure 6 This is an exploded view of the assembly base, positioner, and clamping mechanism provided in the embodiments of the present invention. Figure 1 ; Figure 7 for Figure 6 Enlarged view of section A; Figure 8 This is an exploded view of the assembly base, positioner, and clamping mechanism provided in the embodiments of the present invention. Figure 2 ; Figure 9 for Figure 8 Enlarged view of section B; Figure 10 This is a top view schematic diagram of the welding clamping device provided in an embodiment of the present invention; Figure 11 for Figure 10 Enlarged view of section C; Figure 12 This is a three-dimensional schematic diagram of the welding equipment and stator provided in an embodiment of the present invention.

[0019] Explanation of main component symbols 1000-Welding equipment; 100-Welding clamping device; 100a-Clamping window; 101-Assembly base; 102-Positioner; 10-Fixing plate; 20-Connecting plate; 30-Clamping arm; 31-Clamping arm body; 311-First positioning surface; 312-Clamping groove; 32-Positioning protrusion; 321-Second positioning surface; 322-Contact surface; 40-Supporting arm; 103-Clamping mating mechanism; 50-Clamping mating arm; 51-Protrusion; 52-Clamping mating arm body; 521-Third positioning surface; 53-Clamping protrusion; 531-First positioning surface; 54-Second positioning surface; 55-Clamping protrusion; 56-Second positioning surface; 57-Second positioning surface; 58-Second positioning surface; 59-Second positioning surface; 50-Clamping mating arm; 51-Protrusion; 52-Clamping mating arm body; 521-Third positioning surface; 53-Clamping protrusion; 54-Second positioning surface; 55-Second positioning surface; 56-Second positioning surface; 57-Second positioning surface; 58-Second positioning surface; 59-Second positioning surface; 50-Clamping mating surface; 51-Protrusion; 52-Second positioning surface ... Four positioning surfaces; 532-avoidance slope; 54-extension; 60-drive assembly; 61-clamping power component; 611-drive shaft; 62-guide component; 621-guide groove; 63-transfer push-pull component; 631-slide groove; 70-roller; 104-base; 105-lifting mechanism; 200-stator seat; 300-stator; 301-stator core; 3011-stator slot; 3012-inner hole; 302-winding; 3021-electrical conductor; W1-first displacement direction; W2-second displacement direction; W3-third displacement direction. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the implementation of the present invention will be described in detail below with reference to specific drawings.

[0022] For ease of description, the terms "front," "rear," "left," "right," "up," and "down" used below are consistent with the front, rear, left, right, up, and down directions of the accompanying drawings, but do not limit the structure of the present invention.

[0023] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in the specification and claims of this patent application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0024] like Figure 1 and Figure 2 As shown, the welding clamping device 100 provided in this embodiment includes a mounting base 101 and a positioner 102 and a clamping engagement mechanism 103 respectively mounted on the mounting base 101. The positioner 102 includes a fixing plate 10 fixed on the mounting base 101, a connecting plate 20 for inserting into the inner hole 3012 of the stator core 301, and at least one clamping arm 30 extending from the fixing plate 10 to the connecting plate 20. The clamping engagement mechanism 103 includes at least one clamping engagement arm 50 for engaging with at least one clamping arm 301. The stator core 301 is enclosed to form a clamping window 100a into which the ends of the two electrical conductors 3021 to be welded in the winding 302 are inserted; and a drive assembly 60 is used to drive the clamping arm 50 to move relative to the clamping arm 30 along a displacement direction at a predetermined angle β with respect to the extension direction of the clamping arm 50, and to clamp the ends of the two electrical conductors 3021 to be welded in the winding 302 from both radial and circumferential sides of the stator core 301; the drive assembly 60 is supported on the mounting base 101 and connected to at least one clamping arm 50.

[0025] The aforementioned welding clamping device 100 includes a mounting base 101, a locator 102, and a clamping engagement mechanism 103. The locator 102 includes a fixing plate 10, a connecting plate 20, and a clamping arm 30 extending from the fixing plate 10 to the connecting plate 20. The clamping engagement mechanism 103 includes a clamping engagement arm 50 and a drive assembly 60. The clamping engagement arm 50 is used to form a clamping window 100a with the clamping arm 30 for inserting the ends of the two electrical conductors 3021 to be welded in the winding 302. The drive assembly 60 is used to drive the clamping engagement arm 50 to move relative to the clamping arm 30 in a displacement direction at a preset angle β with the extension direction of the clamping engagement arm 50, and to clamp the winding from both radial and circumferential sides of the stator core 301. The ends of the two electrical conductors 3021 to be welded in group 302 are clamped together. Under the drive of the drive assembly 60, the clamping arm 50 can move relative to the clamping arm 30 in a displacement direction at a preset angle β with the extension direction of the clamping arm 50. When moving toward the clamping arm 30, it can form a clamping window 100a with the clamping arm 30 and clamp the ends of the two electrical conductors 3021 to be welded in the winding 302 from both radial and circumferential sides of the stator core 301. This eliminates the gap between the side wall of the electrical conductor 3021 and the clamping window 100a, so as to avoid the situation where the side wall of the electrical conductor 3021 and the clamp are too large, causing light leakage during welding and damage to the insulation film, and improving the welding quality.

[0026] See Figure 1 The welding clamping device 100 provided in this embodiment can clamp the ends of two electrical conductors 3021 to be welded in the winding 302 of the stator 300 from four directions. The welding clamping device 100 is disposed on one side of the stator 300. The number of welding clamping devices 100 can be increased according to actual production needs and they are arranged around the stator 300.

[0027] The stator 300 includes a stator core 301, on which a plurality of stator slots 3011 are formed. The plurality of stator slots 3011 are arranged around the center of the stator core 301. Each stator slot 3011 extends radially along the stator core 301 and penetrates both end faces of the stator core 301. Each stator slot 3011 is provided with insulating paper (not shown) and a plurality of electrical conductors 3021 that displace the insulating paper. The electrical conductors 3021 in the stator core 301 constitute the windings 302 of the stator 300. The electrical conductors 3021 are made of, but are not limited to, copper. The surface of the electrical conductors 3021 is covered with an insulating film (also called varnish) not shown, and the ends of the electrical conductors 3021 are exposed to the insulating film for welding.

[0028] See Figure 1In this embodiment, the electrical conductor 3021 has, but is not limited to, a rectangular cross-section. The number of ends of the electrical conductor 3021 in each stator slot 3011 is, but is not limited to, six. The ends of the six electrical conductors 3021 are paired up in pairs along the radial direction of the stator core 301 to form three pairs to be welded. The welding clamping device 100 clamps only one pair of the pairs to be welded in the same stator slot 3011 at a time.

[0029] See Figure 1 The welding clamping device 100 provided in this embodiment includes a mounting base 101, a locator 102, and a clamping engagement mechanism 103. The locator 102 and the clamping engagement mechanism 103 are respectively mounted on the mounting base 101 and supported by the mounting base 101. In this embodiment, the welding clamping device 100 also includes a base 104 and a lifting mechanism 105. The mounting base 101 is mounted on the base 104 via the lifting mechanism 105. A guide rail is provided on the base 104, and the lifting mechanism 105 is mounted on the guide rail of the base 104. In this way, before welding clamping, the mounting base 101 can be adjusted to a predetermined height by the lifting mechanism 105, and then the lifting mechanism 105 and the mounting base 101 can be moved to the corresponding position above the stator 300 via the guide rail.

[0030] See Figure 1 The positioner 102 provided in this embodiment includes a fixing plate 10 fixed on the mounting base 101, a connecting plate 20 for inserting into the inner hole 3012 of the stator core 301, and a clamping arm 30 extending from the fixing plate 10 to the connecting plate 20. The fixing plate 10, the clamping arm 30, and the connecting plate 20 can be integrally formed by stamping or can be manufactured separately and then assembled together. In this embodiment, the fixing plate 10, the clamping arm 30, and the connecting plate 20 are, but not limited to, integrally formed. The fixing plate 10 can be manufactured by screws, welding, or other means. The existing fixing method is installed on the mounting base 101. The connecting plate 20 is inserted into the inner hole 3012 of the stator core 301 before clamping the end of the conductor 3021. It should be noted that the positioner 102 also includes a support arm 40, which is connected to the fixing plate 10 and the connecting plate 20 respectively. In this way, by using the connecting plate 20 and the support arm 40, the strength and rigidity of the positioner 102 can be improved, and the clamping arm 30 can be guaranteed to have high compressive strength, thereby preventing the clamping arm 30 from deforming and breaking when clamping the end of the conductor 3021.

[0031] In this embodiment, the fixing plate 10 is fan-shaped and is located outside the stator core 301 when the locator 102 clamps the electrical conductor 3021. The fixing plate 10 and the stator core 301 are concentrically arranged. The clamping arm 30 extends from the fixing plate 10 approximately along the radial direction of the fixing plate 10 (i.e., the radial direction of the stator core 301) to the connecting plate 20. The shape of the connecting plate 20 is, but not limited to, fan-shaped, and its radius of curvature matches that of the fixing plate 10. The number of clamping arms 30 is, but not limited to, three. The three clamping arms 30 are arranged at equal angles around the center of the fixing plate 10 and extend from the fixing plate 10 to the connecting plate 20. The included angle between adjacent clamping arms 30 is, but not limited to, 15°. The number of support arms 40 is, but not limited to, one, and is located on one side of the three clamping arms 30. It should be noted that during welding clamping, the clamping arm 30 and the support arm 40 of the positioner 102 are both placed in the space between adjacent stator slots 3011 in the stator core 301, and the two adjacent clamping arms 30 and the support arm 40 are spaced apart by two stator slots 3011.

[0032] See Figure 1 and Figure 2 The clamping mechanism 103 provided in this embodiment includes a clamping arm 50 and a driving assembly 60. The clamping arm 50 can surround the clamping arm 30 to form a clamping window 100a, so that the ends of the two electrical conductors 3021 to be welded in the winding 302 can be inserted. The driving assembly 60 can drive the clamping arm 50 to move relative to the clamping arm 30 in a displacement direction that is at a preset angle β with the extension direction of the clamping arm 50, and cause the clamping arm 50 and the clamping arm 30 to clamp the ends of the two electrical conductors 3021 to be welded in the winding 302 from both radial sides and both circumferential sides of the stator core 301. In this embodiment, the clamping arm 50 can move relative to the clamping arm 30 in the displacement direction under the drive of the driving assembly 60, thereby surrounding the clamping arm 30 to form a clamping window 100a. A clamping window 100a is formed. The shape of the clamping window 100a is not limited to a rectangle, and the area of ​​the clamping window 100a is basically the sum of the cross-sections of the ends of the two electrical conductors 3021. That is, under the drive of the drive assembly 60, the clamping engagement arm 50 moves and cooperates with the clamping arm 30 to clamp the ends of the pair to be welded from four directions. That is, the four sides of the ends of the two electrical conductors 3021 are centered, pushed and clamped, so that the ends of the electrical conductors 3021 are all wrapped within the clamping window 100a formed by the clamping arm 30 and the clamping engagement arm 50. This can eliminate the gap between the side wall of the electrical conductor 3021 and the clamping window 100a, thereby avoiding the situation where the side wall of the electrical conductor 3021 and the clamp are too far apart, causing light leakage during welding and resulting in damage to the insulating film.

[0033] In this embodiment, the clamping arms 50 are generally elongated and are arranged on the mounting base 101 along the radial direction of the fixing plate 10 (i.e., the radial direction of the stator core 301). The number of clamping arms 50 is, but not limited to, three, and each of the three clamping arms 50 corresponds one-to-one with a clamping arm 30. Under the drive of the drive assembly 60, the three clamping arms 50 move relative to their respective clamping arms 30 along the first displacement direction W1, the second displacement direction W2, and the third displacement direction W3, respectively.

[0034] See Figure 3 and Figure 4 The drive assembly 60 provided in this embodiment includes a clamping power member 61 having a drive shaft 611 connected to the clamping arm 50 and movable in the extending direction of the clamping arm 50, and a guide member 62 capable of moving at least one clamping arm 50 in the displacement direction; both the guide member 62 and the clamping power member 61 are supported on the mounting base 101. In this embodiment, the clamping power member 61 is, but is not limited to, a cylinder, which is fixedly mounted on the mounting base 101 via a cylinder seat. The drive shaft 611 of the clamping power member 61 extends in the extending direction of the clamping arm 50, and the clamping power member 61 is arranged on the mounting base 101 in the radial direction of the fixing plate 10 (i.e., the radial direction of the stator core 301). The outer end of the drive shaft 611 is connected to the clamping arm 50. It can be understood that, driven by the clamping power member 61, the drive shaft 611 moves and drives the clamping arm 50 to move in the extending direction of the clamping arm 50.

[0035] See Figure 3 and Figure 4 In this embodiment, the number of clamping power components 61 is not limited to three, and the three clamping power components 61 correspond one-to-one with the three clamping mating arms 50. The guide component 62 is not limited to one, and the guide component 62 is installed on the mounting base 101 by screws, welding or any other existing fixing method, and can guide the clamping mating arms 50 to move along the displacement direction. That is, when the drive shaft 611 of the clamping power component 61 causes the three clamping mating arms 50 to move, under the guidance of the guide component 62, the three clamping mating arms 50 can be controlled to move relative to their respective clamping arms 30 along the first displacement direction W1, the second displacement direction W2 and the third displacement direction W3 respectively.

[0036] See Figures 3 to 5In this embodiment, a roller 70 is installed on the clamping arm 50, and a guide groove 621 is formed on the guide component 62 for the roller 70 to be inserted. The guide groove 621 extends along the displacement direction. In this embodiment, the guide member 62 is generally a fan-shaped flat plate, which is installed below the locator 102 and forms an installation space for the clamping arm 50 with the locator 102. The bottom surface of the clamping arm 50 abuts against the surface of the guide member 62, so that the clamping arm 50 is slidably disposed on the guide member 62 and supported by the guide member 62. The guide groove 621 is an oblong groove, and the number of guide grooves 621 is not limited to three, corresponding one-to-one with the three clamping arms 50. The three guide grooves 621 extend along the first displacement direction W1, the second displacement direction W2, and the third displacement direction W3, respectively. A roller 70 is installed at the bottom of each clamping arm 50, and the roller 70 is installed in the corresponding guide groove 621. In this way, under the action of each guide groove 621 of the guide member 62, the three clamping arms 50 can be controlled to move relative to their respective clamping arms 30 along the first displacement direction W1, the second displacement direction W2, and the third displacement direction W3, respectively.

[0037] See Figures 3 to 5 The drive assembly 60 provided in this embodiment also includes a transition push-pull component 63. The transition push-pull component 63 extends along the extension direction of the clamping arm 50 and is fixedly connected to the drive shaft 611. The clamping arm 50 is connected to the transition push-pull component 63 and can move relative to the transition push-pull component 63. In this embodiment, the transition push-pull component 63 is generally rectangular, with the clamping arm 50 and the clamping power component 61 connected to its two ends respectively. The transition push-pull component 63 is slidably supported on the surface of the guide component 62. One end of the transition push-pull component 63 is fixedly connected to the drive shaft 611 by a thread, and the other end is movably connected to the clamping arm 50. Under the push-pull drive of the clamping power component 61 and the transition push-pull component 63, the guide component 62 controls the movement of the clamping arm 50 and causes relative movement between the clamping arm 50 and the transition push-pull component 63. In this way, by using the transition push-pull component 63 as a transmission structure, the movement of the clamping arm 50 is more stable, which can ensure the clamping effect and improve the reliability of the structure.

[0038] In other embodiments, one end of the clamping power member 61 is rotatably mounted on the mounting base 101, and the other end is pivotally connected to the clamping engagement arm 50.

[0039] See Figures 3 to 5In this embodiment, each clamping arm 50 has a protrusion 51, and the transition push-pull component 63 has a groove 631 for the protrusion 51 to be inserted and slid. The groove 631 extends in a direction perpendicular to the extension direction of the clamping arm 50, and the two ends of the groove 631 pass through the two side surfaces of the transition push-pull component 63 respectively. With the cooperation of the protrusion 51 and the groove 631, the clamping arm 50 and the transition push-pull component 63 cannot move relative to each other in the extension direction of the clamping arm 50. When the clamping power member 61 drives the clamping arm 50 to move through the transition push-pull component 63, due to the action of the guide member 62, the clamping arm 50 and the transition push-pull component 63 will move relative to each other in the extension direction of the groove 631 (i.e., in a direction perpendicular to the extension direction of the clamping arm 50).

[0040] In this embodiment, the direction of the slide groove 631 is perpendicular to the extension direction of the clamping arm 50, and the preset angle β formed by the extension direction of the guide groove 621 and the extension direction of the clamping arm 50 is, but not limited to, 45°. In this way, under the guidance of the guide groove 621 of the guide member 62, the clamping arm 50 can be controlled to move in a direction at an angle of 45° to the extension direction of the clamping arm 50. This allows the clamping arm 50 to simultaneously push against two adjacent sides of the end of the electrical conductor 3021, and clamp the ends of the two electrical conductors 3021 from four directions simultaneously with the clamping arm 30.

[0041] See Figures 6 to 9The clamping arm 30 provided in this embodiment includes a clamping arm body 31 extending from the fixing plate 10 to the connecting plate 20 and a positioning protrusion 32 protruding on the side wall of the clamping arm body 31. The side wall of the clamping arm body 31 is provided with a first positioning surface 311 for abutting against the side surfaces of the ends of two electrical conductors 3021. The positioning protrusion 32 has a second positioning surface 321 for abutting against the side surfaces of the ends of the electrical conductors 3021, and the second positioning surface 321 is adjacent to the first positioning surface 311. In this embodiment, each clamping arm 30 includes a clamping arm body 31 and a positioning protrusion 32. The clamping arm body 31 extends from the fixing plate 10 to the connecting plate 20, and the positioning protrusion 32 protrudes from the side wall of the clamping arm body 31 along the circumferential direction of the stator core 301. The ends of the conductor 3021 have two narrow side surfaces with smaller areas and two wide side surfaces with larger areas than the narrow side surfaces. The side wall of the clamping arm body 31 is provided with a first positioning surface 311 for abutting against the narrow side surfaces of the ends of the two conductors 3021 to be welded in the winding 302. The positioning protrusion 32 has a second positioning surface 321 for abutting against the wide side surface of the inner side of the ends of the two conductors 3021 to be welded in the winding 302. The second positioning surface 321 is basically perpendicular to the first positioning surface 311. In this way, after the conductor 3021 is pressed against the first positioning surface 311 of the clamping arm body 31 and the second positioning surface 321 of the positioning protrusion 32, the side surface of the conductor 3021 fits more closely with the first positioning surface 311 and the second positioning surface 321, and the gap is smaller, thereby improving the welding effect.

[0042] See Figures 6 to 9The clamping arm 50 provided in this embodiment includes a clamping arm body 52, which is located on one side of the first positioning surface 311 of the clamping arm body 31. A clamping protrusion 53 is formed on the side wall of the clamping arm body 52. ​​The clamping arm body 31, the positioning protrusion 32, the clamping arm body 52, and the clamping protrusion 53 surround to form a clamping window 100a. A third positioning surface 521 is provided on the side wall of the clamping arm body 52 facing the first positioning surface 311 for abutting against the side surface of the ends of the two electrical conductors 3021. The side of the clamping protrusion 53 facing the second positioning surface 321 has a fourth positioning surface 531 for abutting against the side surface of the ends of the electrical conductors 3021. In this embodiment, each clamping arm 50 includes a clamping arm body 52, which is connected to the adapter push-pull component 63 of the drive assembly 60. A protrusion 51 is formed on one end of the clamping arm body 52 connected to the adapter push-pull component 63, and a clamping protrusion 53 is formed on the other end of the clamping arm body 52. The clamping arm body 52 is located on one side of the first positioning surface 311 of the clamping arm body 31. The clamping protrusion 53 is formed on the side wall of the clamping arm body 52 facing the clamping arm 30. The clamping arm body 31, the positioning protrusion 32, the clamping arm body 52, and the clamping protrusion 53 together form a clamping window 100a. The side wall of the clamping arm body 52 facing the first positioning surface 311 is provided with a third positioning surface 521 for abutting against the narrow side of the ends of the two electrical conductors 3021 to be welded in the winding 302 on the side away from the clamping arm body 31. The third positioning surface 521 is parallel to the first positioning surface 311. The side of the clamping protrusion 53 facing the second positioning surface 321 has a fourth positioning surface 531 for abutting against the wide side of the ends of the two electrical conductors 3021 to be welded in the winding 302 on the outside of the outer layer of the electrical conductors 3021. The fourth positioning surface 531 is parallel to the second positioning surface 321. Specifically, the length of the second positioning surface 321 of the positioning protrusion 32 and the fourth positioning surface 531 of the clamping protrusion 53 along the circumferential direction of the stator core 301 are both equal to the length of the end of the conductor 3021 along the circumferential direction of the stator core 301. Thus, after the clamping arm body 31, the positioning protrusion 32, the clamping mating arm body 52, and the clamping protrusion 53 surround and form the clamping window 100a, the conductor 3021 is clamped by the clamping arm 30 and the clamping mating arm 50. The narrow side of the conductor 3021 can effectively contact the first positioning surface 311 and the third positioning surface 521 to eliminate the gap between the clamping arm 30 and the conductor 3021 and the clamping mating arm 50 and the conductor 3021 in the circumferential direction of the stator core 301.

[0043] See Figures 10 to 11In this embodiment, the end of the clamping arm body 52 away from the drive assembly 60 is formed with an extension 54, the positioning protrusion 32 has a contact surface 322 that abuts against the extension 54, and the clamping protrusion 53 abuts against the first positioning surface 311 of the clamping arm body 31 after enclosing and forming the clamping window 100a. In this embodiment, an extension 54 is formed at one end of the clamping arm body 52. ​​The extension 54 extends along the extension direction of the clamping arm 50. The positioning protrusion 32 has a contact surface 322 that abuts against the extension 54. The contact surface 322 is adjacent to the second positioning surface 321. After the clamping window 100a is formed, the clamping protrusion 53 abuts against the first positioning surface 311 of the clamping arm body 31. That is, the clamping arm 30 and the clamping arm 50 move relative to each other to clamp the electrical conductor 3021. After the extension 54 of the clamping arm body 52 abuts against the positioning protrusion 32, the clamping arm 30 and the clamping arm 50 stop moving. At the same time, the clamping protrusion 53 abuts against the first positioning surface 311 of the clamping arm body 31. In this way, the gaps around the perimeter can be eliminated, the welding effect can be improved, and the electrical conductor 3021 can be avoided due to excessive movement of the clamping arm 50 or excessive clamping force.

[0044] See Figures 10 to 11 In this embodiment, the clamping protrusion 53 has a clearance slope 532. The clearance slope 532 extends obliquely from the side wall of the clamping arm body 52 toward the first positioning surface 311 of the clamping arm body 31 and toward the second positioning surface 321 to the fourth positioning surface 531. In this way, when the clamping arm body 52 moves, the clearance slope 532 can avoid the end of the outer layer electrical conductor 3021 in the same displacement stator groove 3011, so as to avoid damage to the electrical conductor 3021.

[0045] See Figure 11 In this embodiment, three clamping arms 30 and three matching clamping arms 50 are respectively used to clamp different layers of electrical conductors 3021. Specifically, the rightmost (right side in the diagram) clamping arm 30 and clamping arm 50 are used to clamp the ends of the two layers of electrical conductors 3021 in the winding 302 near the inner hole 3012 of the stator core 301; the middle clamping arm 30 and clamping arm 50 are used to clamp the ends of the middle two layers of electrical conductors 3021 in the winding 302; and the leftmost (left side in the diagram) clamping arm 30 and clamping arm 50 are used to clamp the ends of the outer two layers of electrical conductors 3021 in the winding 302. It is worth noting that the three clamping arms 30 and three clamping arms 50 are alternately arranged in the space between two adjacent stator slots 3011, and the support arm 40 is connected to the left end (left end in the diagram) of the fixing plate 10 and the connecting plate 20.

[0046] See Figure 11In this embodiment, the positioning protrusion 32 of the rightmost (right side in the diagram) clamping arm 30 is connected to the connecting plate 20. Please continue reading. Figure 11 In this embodiment, both the rightmost (right side in the figure) clamping arm body 31 and the middle clamping arm body 31 are provided with clearance grooves 312 to avoid damaging the ends of the outer layer electrical conductors 3021 in the same stator groove 3011.

[0047] See Figure 12 The welding equipment 1000 provided in this embodiment includes a stator base 200 for fixing a stator 300, and further includes welding clamping devices 100 arranged around the stator base 200. In this embodiment, the stator 300 is supported on the stator base 200, and the stator base 200 is connected to a rotary drive device (not shown) that enables the stator 300 to rotate around its axis. Multiple welding clamping devices 100 are arranged around the axis of the stator 300.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding clamping device, characterized in that, It includes an assembly base and a positioner and a clamping mechanism respectively mounted on the assembly base; the positioner includes a fixing plate fixed on the assembly base, a connecting plate for insertion into the inner hole of the stator core, and at least one clamping arm extending from the fixing plate to the connecting plate. The clamping mechanism includes: at least one clamping arm for forming a clamping window with the at least one clamping arm for inserting the ends of two electrical conductors to be welded in the winding; And a drive assembly for driving the clamping arm to move relative to the clamping arm in a displacement direction at a preset angle to the extension direction of the clamping arm, and clamping the ends of the two electrical conductors to be welded in the winding from both radial and circumferential sides of the stator core; the drive assembly is supported on the mounting base and connected to at least one of the clamping arms.

2. The welding clamping device according to claim 1, characterized in that, The drive assembly includes a clamping power member having a drive shaft connected to at least one of the clamping arms and movable in the extension direction of the clamping arms, and a guide member capable of moving at least one of the clamping arms in the displacement direction; both the guide member and the clamping power member are supported on the mounting base.

3. The welding clamping device according to claim 2, characterized in that, At least one of the clamping arms is equipped with a roller, and the guide member has a guide groove for inserting the roller, the guide groove extending along the displacement direction.

4. The welding clamping device according to claim 2 or 3, characterized in that, The drive assembly further includes a transition push-pull component, which extends along the extension direction of the clamping arm and is fixedly connected to the drive shaft. At least one of the clamping arms is connected to the transition push-pull component and is movable relative to the transition push-pull component.

5. The welding clamping device according to claim 4, characterized in that, At least one of the clamping arms has a protrusion, and the adapter push-pull component has a groove for sliding the protrusion, the groove extending in a direction perpendicular to the extension direction of the clamping arm.

6. The welding clamping device according to any one of claims 1 to 3, characterized in that, At least one clamping arm includes a clamping arm body extending from the fixed plate to the connecting plate and a positioning protrusion protruding from the side wall of the clamping arm body. The side wall of the clamping arm body is provided with a first positioning surface for abutting against the side surfaces of the ends of two electrical conductors. The positioning protrusion has a second positioning surface for abutting against the side surfaces of the ends of the electrical conductors, and the second positioning surface is adjacent to the first positioning surface. At least one clamping mating arm includes a clamping mating arm body located on one side of the first positioning surface of the clamping arm body. A clamping protrusion is formed on the side wall of the clamping mating arm body. The clamping arm body, the positioning protrusion, the clamping mating arm body, and the clamping protrusion together form the clamping window. The side wall of the clamping mating arm body facing the first positioning surface is provided with a third positioning surface for abutting against the side surfaces of the ends of two electrical conductors. The side of the clamping protrusion facing the second positioning surface has a fourth positioning surface for abutting against the side surfaces of the ends of the electrical conductors.

7. The welding clamping device according to claim 6, characterized in that, An extension is formed at the end of the clamping arm body away from the drive assembly, and the positioning protrusion has a contact surface that abuts against the extension. After the clamping protrusion surrounds and forms the clamping window, it abuts against the first positioning surface of the clamping arm body.

8. The welding clamping device according to claim 6, characterized in that, The clamping protrusion has a clearance slope that extends from the side wall of the clamping arm body toward the first positioning surface and then toward the second positioning surface to the fourth positioning surface.

9. The welding clamping device according to any one of claims 1 to 3, characterized in that, The fixing plate is fan-shaped, and there are three clamping arms. The three clamping arms are arranged at equal angles around the center of the fixing plate and extend from the fixing plate to the connecting plate. There are three clamping mating arms, which correspond one-to-one with the three clamping arms.

10. A welding apparatus, comprising a stator base for fixing a stator, characterized in that, It also includes at least one welding clamping device as described in any one of claims 1 to 9, which is provided on the periphery of the stator seat.

Images