Welding clamping device and welding apparatus

Abstract

The present application relates to the technical field of stator welding, and provides a welding clamping device and welding equipment, which comprises an assembly seat, a positioner and a clamping cooperation mechanism; the positioner comprises a fixed plate, a connecting plate for being placed into an inner hole of a stator core and a clamping arm extending from the fixed plate to the connecting plate; the clamping cooperation mechanism comprises: a clamping cooperation arm for surrounding the clamping arm to form a clamping window for placing the end portions of two electric conductors to be welded in a winding; and a driving assembly for driving the clamping cooperation arm to move relative to the clamping arm in a displacement direction at a preset clamping angle with the extension direction of the clamping cooperation arm, and clamping the end portions of the two electric conductors to be welded in the winding from the two sides in the radial direction and the two sides in the circumferential direction of the stator core; the driving assembly is supported on the assembly seat and connected with the clamping cooperation arm. Compared with the prior art, the present application avoids the light leakage during welding caused by the too large gap between the side wall of the electric conductor and the clamp, and improves the welding quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stator welding, in particular to a welding clamping device and welding equipment. BACKGROUND

[0002] The laser welding of flat wire motor is a method of welding flat wire motor by using laser technology. Laser welding has the characteristics of fast welding speed, high efficiency, easy focusing and alignment of laser beam, strong adaptability, etc. It can realize accurate welding of the stator of the flat wire motor, improve the welding speed and product quality, and has wide application in the fields of electric vehicles and industries.

[0003] At present, in the welding process of the flat wire motor, a clamping tool for welding is needed to clamp the to-be-welded pair in the winding. The traditional clamping tool can only clamp the end of the electrical conductor in the winding in one direction during clamping. Therefore, the gap between the electrical conductor and the clamping tool is large, which is easy to leak light, resulting in damage to the paint during welding, thereby affecting the welding quality. SUMMARY

[0004] One of the purposes of the present application is to provide a welding clamping device to solve the technical problems of unsatisfactory clamping effect of the electrical conductor during welding and easy light leakage in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a welding clamping device, comprising an assembly seat and a positioner and a clamping cooperation mechanism respectively mounted on the assembly seat; the positioner comprises a fixed plate fixed on the assembly seat, a connecting plate for being placed into an inner hole of a stator core, and at least one clamping arm extending from the fixed plate to the connecting plate; the clamping cooperation mechanism comprises: at least one clamping cooperation arm for surrounding the at least one clamping arm to form a clamping window for placing the ends of the two electrical conductors to be welded in the winding; and a driving assembly for driving the clamping cooperation arm to move relative to the clamping arm along a displacement direction at a preset clamping angle with the extension direction of the clamping cooperation arm, and clamping the ends of the two electrical conductors to be welded in the winding from the two sides in the radial direction and the two sides in the circumferential direction of the stator core.

[0006] The technical scheme of the present application has the following advantages: the welding clamping device comprises an assembling seat, a positioner and a clamping cooperation mechanism, the positioner comprises a fixed plate, a connecting plate and a clamping arm extending from the fixed plate to the connecting plate; the clamping cooperation mechanism comprises a clamping cooperation arm and a driving assembly, the clamping cooperation arm is used to form a clamping window with the clamping arm for placing the ends of the two electric conductors to be welded in the winding, and the driving assembly is used to drive the clamping cooperation arm to move relative to the clamping arm in a displacement direction at a preset angle with the extension direction of the clamping cooperation arm and clamp the ends of the two electric conductors to be welded in the winding from the two sides in the radial direction and the two sides in the circumferential direction of the stator core, so that under the driving of the driving assembly, the clamping cooperation arm can move relative to the clamping arm in the displacement direction at the preset angle with the extension direction of the clamping cooperation arm, and when moving towards the clamping arm, the clamping cooperation arm can form the clamping window with the clamping arm and clamp the ends of the two electric conductors to be welded in the winding from the two sides in the radial direction and the two sides in the circumferential direction of the stator core, thereby eliminating the gap between the side wall of the electric conductor and the clamping window, avoiding the situation that the side wall of the electric conductor and the clamp are caused to leak light during welding due to the excessively large gap to cause damage to the insulating film, and improving the welding quality.

[0007] In some embodiments, the driving assembly comprises a clamping power member having a driving shaft connected with the at least one clamping cooperation arm and capable of moving in the extension direction of the clamping cooperation arm, and a guide component capable of moving the at least one clamping cooperation arm in the displacement direction; the guide component and the clamping power member are both supported on the assembling seat.

[0008] In some embodiments, a roller is mounted on the at least one clamping cooperation arm, and a guide groove for placing the roller is formed on the guide component and extends in the displacement direction.

[0009] In some embodiments, the driving assembly further comprises a transfer push-pull component, the transfer push-pull component extends in the extension direction of the clamping cooperation arm and is fixedly connected with the driving shaft, and the at least one clamping cooperation arm is connected with the transfer push-pull component and capable of moving relative to the transfer push-pull component.

[0010] In some embodiments, a protrusion is formed on the at least one clamping cooperation arm, and a sliding groove for sliding the protrusion is formed on the transfer push-pull component and extends in a direction perpendicular to the extension direction of the clamping cooperation arm.

[0011] In some embodiments, the at least one clamping arm comprises a clamping arm body extending from the fixed plate to the connecting plate, and a positioning protrusion protruding on 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 surface of the end portion of the two electric conductors, the positioning protrusion has a second positioning surface for abutting against the side surface of the end portion of the electric conductor, and the second positioning surface is adjacent to the first positioning surface; the at least one clamping matching arm comprises a clamping matching arm body located on one side of the first positioning surface of the clamping arm body, and a clamping protrusion is formed on the side wall of the clamping matching arm body, and the clamping arm body, the positioning protrusion, the clamping matching arm body and the clamping protrusion enclose a clamping window; the side wall of the clamping matching arm body facing the first positioning surface is provided with a third positioning surface for abutting against the side surface of the end portion of the two electric conductors, and the side of the clamping protrusion facing the second positioning surface has a fourth positioning surface for abutting against the side surface of the end portion of the electric conductor.

[0012] In some embodiments, an extension is formed at one end of the clamping matching arm body away from the driving assembly, the positioning protrusion has a contact surface abutting against the extension, and the clamping protrusion abuts against the first positioning surface of the clamping arm body after being enclosed to form the clamping window.

[0013] In some embodiments, the clamping protrusion has an avoiding inclined surface extending obliquely from the side wall of the clamping matching arm body to the first positioning surface and to the second positioning surface to the fourth positioning surface.

[0014] In some embodiments, the fixed plate is in the shape of a fan ring, the number of clamping arms is three, the three clamping arms are arranged at equal angles around the center of the fixed plate and respectively extend from the fixed plate to the connecting plate towards the center of the fixed plate, and the number of clamping matching arms is three, corresponding to the three clamping arms respectively.

[0015] Another object of the present application is to provide a welding device to solve the technical problems of poor welding effect and low welding quality in the prior art.

[0016] To achieve the object, the present application provides a welding device comprising a stator seat for fixing a stator, wherein at least one welding clamping device described above is arranged on the side of the stator seat.

[0017] The welding device adopts the welding clamping device described above, and has the effects of stable welding, good welding effect and high welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the welding clamping device and the stator provided by the embodiments of the present application;

[0019] Figure 2 is a top view of the welding clamping device and the stator provided by the embodiments of the present application;

[0020] Figure 3 This is a three-dimensional schematic diagram of the welding clamping device provided in an embodiment of the present invention;

[0021] Figure 4 This is an exploded view of the welding clamping device provided in an embodiment of the present invention;

[0022] Figure 5 This is a cross-sectional schematic diagram of the welding clamping device provided in an embodiment of the present invention;

[0023] 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 ;

[0024] Figure 7 for Figure 6 Enlarged view of section A in the middle;

[0025] 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 ;

[0026] Figure 9 for Figure 8 Enlarged view of section B;

[0027] Figure 10 This is a top view schematic diagram of the welding clamping device provided in an embodiment of the present invention;

[0028] Figure 11 for Figure 10 Enlarged view of section C;

[0029] Figure 12 This is a three-dimensional schematic diagram of the welding equipment and stator provided in an embodiment of the present invention.

[0030] Explanation of main component symbols

[0031] 1000-welding device; 100-welding clamping device; 100a-clamping window; 101-assembly seat; 102-positioner; 10-fixing plate; 20-connecting plate; 30-clamping arm; 31-clamping arm body; 311-first positioning surface; 312-clearance groove; 32-positioning protrusion; 321-second positioning surface; 322-contact surface; 40-supporting arm; 103-clamping matching mechanism; 50-clamping matching arm; 51-protrusion; 52-clamping matching arm body; 521-third positioning surface; 53-clamping protrusion; 531-fourth positioning surface; 532-clearance slope; 54-extension; 60-driving assembly; 61-clamping power member; 611-driving shaft; 62-guiding component; 621-guiding groove; 63-adapting push-pull component; 631-slotted 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-electric conductor; W1-first displacement direction; W2-second displacement direction; W3-third displacement direction. DETAILED DESCRIPTION

[0032] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0033] In order to make those skilled in the art better understand the technical solutions of the present application, the implementation of the present application will be described in detail below in combination with specific drawings.

[0034] For the convenience of description, the "front", "rear", "left", "right", "upper", "lower" in the following are consistent with the front, rear, left, right, upper, lower directions of the drawings themselves, but do not limit the structure of the present application.

[0035] Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second" and similar words used in the patent application description and claims of the present application do not represent any order, quantity or importance, but are used to distinguish different components. Similarly, "one" or "a" and similar words do not represent a quantity limitation, but represent the existence of at least one.

[0036] As Figure 1 and Figure 2As shown, the welding clamping device 100 provided by the embodiment includes an assembly seat 101, a positioner 102 and a clamping cooperation mechanism 103 mounted on the assembly seat 101 respectively; the positioner 102 includes a fixed plate 10 fixed on the assembly seat 101, a connecting plate 20 for being placed into an inner hole 3012 of the stator core 301 and at least one clamping arm 30 extending from the fixed plate 10 to the connecting plate 20; the clamping cooperation mechanism 103 includes: at least one clamping cooperation arm 50 for surrounding the at least one clamping arm 30 to form a clamping window 100a for placing the ends of the two electric conductors 3021 to be welded in the winding 302; and a driving assembly 60 for driving the clamping cooperation arm 50 to move relative to the clamping arm 30 along a displacement direction at a preset clamping angle β with the extension direction of the clamping cooperation arm 50, and clamping the ends of the two electric conductors 3021 to be welded in the winding 302 from the two sides in the radial direction and the two sides in the circumferential direction of the stator core 301; the driving assembly 60 is supported on the assembly seat 101 and connected with the at least one clamping cooperation arm 50.

[0037] The welding clamping device 100 described above includes the assembly seat 101, the positioner 102 and the clamping cooperation mechanism 103, the positioner 102 includes the fixed plate 10, the connecting plate 20 and the clamping arm 30 extending from the fixed plate 10 to the connecting plate 20; the clamping cooperation mechanism 103 includes the clamping cooperation arm 50 and the driving assembly 60, the clamping cooperation arm 50 is used for surrounding the clamping arm 30 to form the clamping window 100a for placing the ends of the two electric conductors 3021 to be welded in the winding 302; the driving assembly 60 is used for driving the clamping cooperation arm 50 to move relative to the clamping arm 30 along a displacement direction at a preset clamping angle β with the extension direction of the clamping cooperation arm 50, and clamping the ends of the two electric conductors 3021 to be welded in the winding 302 from the two sides in the radial direction and the two sides in the circumferential direction of the stator core 301, so that under the driving of the driving assembly 60, the clamping cooperation arm 50 can move relative to the clamping arm 30 along the displacement direction at the preset clamping angle β with the extension direction of the clamping cooperation arm 50, when moving towards the clamping arm 30, can surround the clamping arm 30 to form the clamping window 100a, and clamp the ends of the two electric conductors 3021 to be welded in the winding 302 from the two sides in the radial direction and the two sides in the circumferential direction of the stator core 301, thereby eliminating the gap between the side wall of the electric conductor 3021 and the clamping window 100a, to avoid the situation that the side wall of the electric conductor 3021 and the clamp leak light during welding due to the too large gap to cause the damage of the insulation film, and improve the welding quality.

[0038] Referring to Figure 1The welding clamping device 100 provided by the embodiment can clamp the end portions of the two electric conductors 3021 to be welded in the winding 302 of the stator 300 from four directions. The welding clamping device 100 is arranged on one side of the stator 300, and the number of the welding clamping device 100 can be increased according to actual production needs and arranged around the stator 300.

[0039] The stator 300 includes a stator core 301, and a plurality of stator slots 3011 are formed on the stator core 301. The plurality of stator slots 3011 are arranged around the center of the stator core 301. Each stator slot 3011 extends along the radial direction of the stator core 301 and penetrates through two end faces of the stator core 301. An insulating paper (not shown) and a plurality of electric conductors 3021 arranged in the insulating paper are arranged in each stator slot 3011. The electric conductors 3021 in the stator core 301 constitute the winding 302 of the stator 300. The electric conductors 3021 are made of copper but are not limited thereto. The surface of the electric conductors 3021 is covered with an insulating film (also referred to as a varnish) (not shown), and the end portions of the electric conductors 3021 are exposed from the insulating film for welding.

[0040] Referring to Figure 1 In the embodiment, the electric conductors 3021 have a rectangular cross section but are not limited thereto. The number of the end portions of the electric conductors 3021 in each stator slot 3011 is six but is not limited thereto. The end portions of the six electric conductors 3021 are arranged in pairs along the radial direction of the stator core 301 to form three pairs of welding pairs. The welding clamping device 100 clamps the end portions of only one pair of welding pairs in each stator slot 3011 at a time.

[0041] Referring to Figure 1 The welding clamping device 100 provided by the embodiment includes an assembly seat 101, a positioner 102, and a clamping cooperation mechanism 103. The positioner 102 and the clamping cooperation mechanism 103 are respectively installed on and supported by the assembly seat 101. In the embodiment, the welding clamping device 100 further includes a base 104 and a lifting mechanism 105. The assembly seat 101 is installed on the base 104 through the lifting mechanism 105. The base 104 is provided with a guide rail, and the lifting mechanism 105 is installed on the guide rail of the base 104. In this way, the assembly seat 101 can be adjusted to a predetermined height through the lifting mechanism 105 before welding and clamping, and the lifting mechanism 105 and the assembly seat 101 can be moved to a corresponding position above the stator 300 through the guide rail.

[0042] Referring to Figure 1The positioner 102 provided by the embodiment comprises a fixing plate 10 fixed on the assembling seat 101, a connecting plate 20 arranged in the inner hole 3012 of the stator core 301, and clamping arms 30 extending from the fixing plate 10 to the connecting plate 20. The fixing plate 10, the clamping arms 30 and the connecting plate 20 can be integrally formed by stamping or separately formed and assembled together. In the embodiment, the fixing plate 10, the clamping arms 30 and the connecting plate 20 are integrally formed but are not limited to this. The fixing plate 10 is installed on the assembling seat 101 by means of screws, welding or other existing fixing methods. The connecting plate 20 is arranged in the inner hole 3012 of the stator core 301 in front of the end portion of the clamped electric conductor 3021. It should be noted that the positioner 102 further comprises support arms 40 connected to the fixing plate 10 and the connecting plate 20 respectively. In this way, the connecting plate 20 and the support arms 40 can improve the strength and rigidity of the positioner 102 and ensure that the clamping arms 30 have high compressive strength, thereby preventing the clamping arms 30 from deforming and breaking when clamping the end portion of the electric conductor 3021.

[0043] In the embodiment, the fixing plate 10 is in the shape of a fan ring. The fixing plate 10 is located outside the stator core 301 when the positioner 102 clamps the electric conductor 3021 and is arranged concentrically with the stator core 301. The clamping arms 30 extend from the fixing plate 10 to the connecting plate 20 in the radial direction of the fixing plate 10, i.e. the radial direction of the stator core 301. The connecting plate 20 is in the shape of a fan ring but is not limited to this. The curvature radius of the connecting plate 20 matches that of the fixing plate 10. The number of the clamping arms 30 is three but is not limited to this. 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 towards the center of the fixing plate 10. The included angle between adjacent clamping arms 30 is 15° but is not limited to this. The number of the support arms 40 is one but is not limited to this. The support arm 40 is located on one side of the three clamping arms 30. It should be noted that, when the clamping arms 30 and the support arms 40 are welded, the clamping arms 30 and the support arms 40 are arranged in the space between adjacent stator slots 3011 in the stator core 301. Two stator slots 3011 are arranged between the two adjacent clamping arms 30 and between the support arm 40 and the adjacent clamping arm 30.

[0044] Referring to Figure 1 and Figure 2The clamping fitting mechanism 103 provided by the embodiment includes the clamping fitting arm 50 and the driving assembly 60. The clamping fitting arm 50 can be combined with the clamping arm 30 to form the clamping window 100a for placing the ends of the two electric conductors 3021 to be welded in the winding 302. The driving assembly 60 can drive the clamping fitting arm 50 to move relative to the clamping arm 30 along a displacement direction at a preset clamping angle β with the extension direction of the clamping fitting arm 50, and make the clamping fitting arm 50 and the clamping arm 30 clamp the ends of the two electric conductors 3021 to be welded in the winding 302 from the two sides in the radial direction of the stator core 301 and from the two sides in the circumferential direction of the stator core 301. In the embodiment, the clamping fitting arm 50 can be driven by the driving assembly 60 to move relative to the clamping arm 30 along the displacement direction, so as to be combined with the clamping arm 30 to form the clamping window 100a. The shape of the clamping window 100a is but not limited to a rectangle, and the area of the clamping window 100a is substantially the sum of the cross sections of the ends of the two electric conductors 3021. That is, under the driving of the driving assembly 60, the clamping fitting arm 50 moves and cooperates with the clamping arm 30 to clamp the ends of the two electric conductors 3021 from four directions, that is, the four sides of the ends of the two electric conductors 3021 are centered and clamped, the four sides of the ends of the electric conductors 3021 are wrapped in the clamping window 100a formed by the clamping arm 30 and the clamping fitting arm 50, and the gap between the side wall of the electric conductor 3021 and the clamping window 100a can be eliminated, so that the situation that the side wall of the electric conductor 3021 and the clamp are too large to cause light leakage during welding and cause damage to the insulation film can be avoided.

[0045] In the embodiment, the clamping fitting arm 50 is substantially long strip-shaped, which is arranged on the assembly seat 101 along the radial direction of the fixed plate 10, that is, the radial direction of the stator core 301. The number of the clamping fitting arms 50 is but not limited to three, and the three clamping fitting arms 50 correspond to the three clamping arms 30 one by one. Under the driving of the driving assembly 60, the three clamping fitting arms 50 respectively move relative to the corresponding clamping arms 30 along the first displacement direction W1, the second displacement direction W2 and the third displacement direction W3.

[0046] Referring to Figure 3 and Figure 4The driving assembly 60 provided by the embodiment comprises clamping power members 61 having driving shafts 611 connected with the clamping arms 50 and capable of moving in the extension direction of the clamping arms 50, and guiding members 62 capable of moving at least one clamping arm 50 in the displacement direction; the guiding members 62 and the clamping power members 61 are supported on the assembly seat 101. In the embodiment, the clamping power members 61 are but not limited to air cylinders, which are fixedly installed on the assembly seat 101 through air cylinder seats. The driving shafts 611 of the clamping power members 61 extend in the extension direction of the clamping arms 50, and the clamping power members 61 are arranged on the assembly seat 101 in the radial direction of the fixed plate 10 (i.e. the radial direction of the stator core 301), and the outer ends of the driving shafts 611 are connected with the clamping arms 50. It can be understood that under the driving of the clamping power members 61, the driving shafts 611 move and drive the clamping arms 50 to move in the extension direction of the clamping arms 50.

[0047] Referring to Figure 3 and Figure 4 In the embodiment, the number of the clamping power members 61 is but not limited to three, the three clamping power members 61 correspond to the three clamping arms 50 respectively, and the guiding member 62 is but not limited to one, which is installed on the assembly seat 101 through screws, welding or any other existing fixing mode and capable of moving the guiding clamping arms 50 in the displacement direction, that is, when the driving shafts 611 of the clamping power members 61 drive the three clamping arms 50 to act, the three clamping arms 50 can be controlled to move in the first displacement direction W1, the second displacement direction W2 and the third displacement direction W3 respectively relative to the corresponding clamping arms 30 under the guidance of the guiding member 62.

[0048] Referring to Figures 3 to 5The clamping fitting arm 50 is provided with a roller 70, and the guide component 62 is provided with a guide groove 621 in which the roller 70 is arranged, and the guide groove 621 extends along the displacement direction. In this embodiment, the guide component 62 is a substantially fan-shaped plate, which is arranged below the positioner 102 and forms an installation space with the positioner 102 for installing the clamping fitting arm 50. The bottom surface of the clamping fitting arm 50 is in abutment with the surface of the guide component 62, so that the clamping fitting arm 50 is slidingly arranged on the guide component 62 and supported by the guide component 62. The guide groove 621 is a waist-shaped groove, and the number of the guide grooves 621 is three, but is not limited to three, and each of the three guide grooves 621 corresponds to one of the three clamping fitting 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. The roller 70 is arranged on the bottom of each clamping fitting arm 50 and arranged in the corresponding guide groove 621. Thus, under the action of the guide grooves 621 of the guide component 62, the three clamping fitting arms 50 can be controlled to move along the first displacement direction W1, the second displacement direction W2 and the third displacement direction W3 respectively.

[0049] Referring to Figures 3 to 5 The driving assembly 60 further comprises a connecting and pulling component 63, which extends along the extension direction of the clamping fitting arm 50 and is fixedly connected with the driving shaft 611. The clamping fitting arm 50 is connected with the connecting and pulling component 63 and can move relative to the connecting and pulling component 63. In this embodiment, the connecting and pulling component 63 is a substantially cuboid, and the two ends of the connecting and pulling component 63 are connected with the clamping fitting arm 50 and the clamping power component 61 respectively. The connecting and pulling component 63 is slidingly supported on the surface of the guide component 62. One end of the connecting and pulling component 63 is fixedly connected with the driving shaft 611 by a threaded mode, and the other end is movably connected with the clamping fitting arm 50. Under the driving of the clamping power component 61 and the connecting and pulling component 63, the guide component 62 controls the movement of the clamping fitting arm 50 and the relative movement between the clamping fitting arm 50 and the connecting and pulling component 63. Thus, the connecting and pulling component 63 is used as a transmission structure, the movement of the clamping fitting arm 50 is more stable, the clamping effect is guaranteed, and the reliability of the structure is improved.

[0050] In other embodiments, one end of the clamping power component 61 is rotatably arranged on the assembly seat 101, and the other end is pivotally connected with the clamping fitting arm 50.

[0051] Referring to Figures 3 to 5In the present embodiment, a protrusion 51 is formed on each clamping and matching arm 50, and a sliding groove 631 is formed on the adapter push-pull component 63 for the protrusion 51 to be inserted and slid in, the sliding groove 631 extends in a direction perpendicular to the extending direction of the clamping and matching arm 50, and the two ends of the sliding groove 631 respectively penetrate through the two side surfaces of the adapter push-pull component 63. Under the cooperation of the protrusion 51 and the sliding groove 631, the clamping and matching arm 50 and the adapter push-pull component 63 cannot move relative to each other in the extending direction of the clamping and matching arm 50, and when the clamping power component 61 drives the clamping and matching arm 50 to move through the adapter push-pull component 63, the clamping and matching arm 50 and the adapter push-pull component 63 will move relative to each other in the extending direction of the sliding groove 631 (i.e. in the direction perpendicular to the extending direction of the clamping and matching arm 50) due to the effect of the guide component 62.

[0052] In the present embodiment, the extending direction of the sliding groove 631 is perpendicular to the extending direction of the clamping and matching arm 50, and the preset included angle β formed between the extending direction of the guide groove 621 and the extending direction of the clamping and matching arm 50 is but not limited to 45°, so that the clamping and matching arm 50 can be controlled to move in the direction with a 45° angle with the extending direction of the clamping and matching arm 50 under the guidance of the guide groove 621 of the guide component 62, and the clamping and matching arm 50 can simultaneously push the adjacent two side surfaces of the end of the electric conductor 3021 and be clamped by the clamping arms 30 from four directions to clamp the end of the two electric conductors 3021.

[0053] Referring to Figures 6 to 9The clamping arm 30 comprises a clamping arm body 31 extending from the fixed plate 10 to the connecting plate 20 and a positioning protrusion 32 protruding from 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 the narrow side of the end of the two electric conductors 3021. The positioning protrusion 32 is provided with a second positioning surface 321 for abutting the wide side of the end of the electric conductor 3021. In this embodiment, each clamping arm 30 comprises a clamping arm body 31 extending from the fixed plate 10 to the connecting plate 20 and a positioning protrusion 32 protruding from the side wall of the clamping arm body 31 along the circumferential direction of the stator core 301. The end of the electric conductor 3021 has two narrow sides with smaller areas and two wide sides with larger areas. The side wall of the clamping arm body 31 is provided with a first positioning surface 311 for abutting the narrow side of the end of the two electric conductors 3021 to be welded in the winding 302. The positioning protrusion 32 is provided with a second positioning surface 321 for abutting the wide side of the end of the electric conductor 3021 on the inner side of the inner layer of the two electric conductors 3021 to be welded in the winding 302. The second positioning surface 321 is substantially perpendicular to the first positioning surface 311. After the electric conductors 3021 are 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 of the electric conductors 3021 is more closely attached to the first positioning surface 311 and the second positioning surface 321, and the gap is smaller, thereby improving the welding effect.

[0054] Referring to Figures 6 to 9The clamping fitting arm 50 provided by the embodiment includes a clamping fitting arm body 52 located at 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 fitting arm body 52. The clamping arm body 31, the positioning protrusion 32, the clamping fitting arm body 52 and the clamping protrusion 53 enclose a clamping window 100a. A third positioning surface 521 is arranged on the side wall of the clamping fitting arm body 52 facing the first positioning surface 311 and is used to abut against the side surface of the end portion 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 used to abut against the side surface of the end portion of the electrical conductor 3021. In the embodiment, each clamping fitting arm 50 includes a clamping fitting arm body 52 connected with the adapter push-pull component 63 of the driving assembly 60. The protrusion 51 is formed on one end of the clamping fitting arm body 52 connected with the adapter push-pull component 63. The clamping protrusion 53 is formed on the other end of the clamping fitting arm body 52. The clamping fitting arm body 52 is located at 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 fitting arm body 52 facing the clamping arm 30. The clamping arm body 31, the positioning protrusion 32, the clamping fitting arm body 52 and the clamping protrusion 53 enclose the clamping window 100a. The side wall of the clamping fitting arm body 52 facing the first positioning surface 311 is provided with the third positioning surface 521 used to abut against the narrow side surface of the end portion of the two electrical conductors 3021 in the winding 302 away from the side of 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 the fourth positioning surface 531 used to abut against the wide side surface of the end portion of the electrical conductor 3021 located at the outer layer of the two electrical conductors 3021 in the winding 302. The fourth positioning surface 531 is parallel to the second positioning surface 321. In particular, the length of the second positioning surface 321 of the positioning protrusion 32 and the length of the fourth positioning surface 531 of the clamping protrusion 53 along the circumference of the stator core 301 are equal to the length of the end portion of the electrical conductor 3021 along the circumference of the stator core 301. Thus, after the clamping arm body 31, the positioning protrusion 32, the clamping fitting arm body 52 and the clamping protrusion 53 enclose the clamping window 100a, the electrical conductor 3021 is clamped by the clamping arm 30 and the clamping fitting arm 50. The narrow side surface of the electrical 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 electrical conductor 3021 and between the clamping fitting arm 50 and the electrical conductor 3021 along the circumference of the stator core 301.

[0055] Referring to Figures 10 to 11The end of the clamping matching arm body 52 away from the driving assembly 60 is formed with an extension 54, the positioning protrusion 32 has a contact surface 322 abutting against the extension 54, and the clamping protrusion 53 abuts against the first positioning surface 311 of the clamping arm body 31 after the clamping window 100a is enclosed. In this embodiment, the end of the clamping matching arm body 52 is formed with the extension 54 extending along the extension direction of the clamping matching arm 50, the positioning protrusion 32 has the contact surface 322 abutting against the extension 54, the contact surface 322 abuts against the second positioning surface 321, and the clamping protrusion 53 abuts against the first positioning surface 311 of the clamping arm body 31 after the clamping window 100a is enclosed. That is, the clamping arm 30 and the clamping matching arm 50 are relatively moved to clamp the electric conductor 3021, the clamping arm 30 and the clamping matching arm 50 stop moving after the extension 54 of the clamping matching arm body 52 abuts against the positioning protrusion 32, and the clamping protrusion 53 abuts against the first positioning surface 311 of the clamping arm body 31. In this way, the gap around can be eliminated, the welding effect is improved, and the electric conductor 3021 can be prevented from being damaged due to the excessive movement stroke and the excessive clamping force of the clamping matching arm 50.

[0056] Referring to Figures 10 to 11 In this embodiment, the clamping protrusion 53 has an avoiding inclined surface 532 extending to the fourth positioning surface 531 from the side wall of the clamping matching arm body 52 towards the first positioning surface 311 and towards the second positioning surface 321. In this way, when the clamping matching arm body 52 moves, the avoiding inclined surface 532 can avoid the end of the outer electric conductor 3021 in the stator slot 3011, so that the electric conductor 3021 can be prevented from being damaged.

[0057] Referring to Figure 11 In this embodiment, the three clamping arms 30 and the three clamping matching arms 50 matched with the three clamping arms 30 are respectively used for clamping the electric conductors 3021 of different layers. The rightmost (the right in the drawing) clamping arm 30 and the clamping matching arm 50 are used for clamping the ends of the two layers of electric conductors 3021 close to the inner hole 3012 of the stator core 301 in the winding 302, the middle clamping arm 30 and the clamping matching arm 50 are used for clamping the ends of the middle two layers of electric conductors 3021 in the winding 302, and the leftmost (the left in the drawing) clamping arm 30 and the clamping matching arm 50 are used for clamping the ends of the two layers of electric conductors 3021 on the outside of the winding 302. It is worth mentioning that the three clamping arms 30 and the three clamping matching arms 50 are alternately arranged in the space between the two adjacent stator slots 3011, and the supporting arm 40 is connected to the left end (the left in the drawing) of the fixed plate 10 and the connecting plate 20.

[0058] Referring to Figure 11In the embodiment, the positioning protrusion 32 of the rightmost (the right in the drawing) clamping arm 30 is connected with the connecting plate 20. Please continue to see Figure 11 In the embodiment, the hollow groove 312 is formed on the rightmost (the right in the drawing) clamping arm body 31 and the middle clamping arm body 31, so as to avoid the damage to the outer layer electric conductor 3021 in the stator slot 3011.

[0059] Please see Figure 12 The welding device 1000 provided by the embodiment comprises a stator seat 200 for fixing the stator 300, wherein the welding clamping device 100 is arranged on the periphery of the stator seat 200. In the embodiment, the stator 300 is supported on the stator seat 200, the stator seat 200 is connected with a rotary driving device (not shown in the drawing), the stator 300 can rotate around the axis thereof, and the welding clamping device 100 is in a plurality and can be arranged around the axis of the stator 300.

[0060] The above merely describes the preferred embodiment of the present application, but should not be used to limit the present application, and any modification, equivalent replacement or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

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 to allow the ends of two electrical conductors to be welded in the winding to be inserted; and a driving assembly for driving the clamping arm to move relative to the clamping arm in a displacement direction at a preset angle to the extending 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 driving assembly is supported on the mounting base and connected to at least one clamping arm. 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. 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. 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.

2. The welding clamping device according to claim 1, 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.

3. The welding clamping device according to claim 1 or 2, 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.

4. The welding clamping device according to claim 3, 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.

5. The welding clamping device according to claim 3, 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.

6. The welding clamping device according to claim 1 or 2, 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.

7. 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 6, disposed on the periphery of the stator seat.

Images