Branching block, clamping tool for welding and positioning method of clamping tool

Abstract

The invention discloses a branching block, a clamping tool for welding and a positioning method of the branching block. The branching block comprises a branching block main body part and a first separation part, the branching block main body part is arranged along the radial direction of the flat wire motor disc body; limiting faces or limiting lines are arranged on the two side faces of the branching block main body part and used for abutting against the side faces of two adjacent sets of copper bars in the circumferential direction. The first separation part is arranged on at least one side surface of the branching block main body part and protrudes out of the branching block main body part along the circumferential direction; the first separation part comprises a plurality of first separation blocks which are arranged at intervals in the radial direction, and the first separation blocks are used for being inserted into welding gaps between two copper bar terminals which are adjacent in the radial direction when the branching blocks move downwards. According to the invention, the two side surfaces of the main body part of the branching block are provided with the limiting surfaces or the limiting lines used for abutting against the side surfaces of the two groups of copper bars adjacent in the circumferential direction, and when the branching block moves downwards, the first separation block can be inserted into a welding gap between the two copper bar terminals adjacent in the radial direction.

Description

Technical Field

[0001] The invention relates to the field of laser welding of flat wire motor stators, and in particular to a line dividing block, a welding clamping tool and a positioning method thereof. Background Art

[0002] At present, with the widespread popularity of electric vehicles, the electric drive stator components of new energy vehicles have adopted flat wire stator winding structures in batches. Due to the increasingly high requirements for power density and motor efficiency, various electric drive manufacturers have begun to develop ultra-low-end flat wire stators, in which the straight section of the welding end is reduced from 10mm to 5mm. Traditional welding tools can no longer meet the needs. In addition, the existing welding clamping tool only clamps the copper bar group unit from the outside, making it impossible to ensure the welding gap between the copper bar terminals, thus affecting the final welding quality.

[0003] Therefore, it is urgent to propose a new solution to solve the above problems. Summary of the invention

[0004] The present invention provides a branching block, a welding clamping tool and a positioning method thereof, so as to solve the problem that the existing welding clamping tool cannot meet the requirements of the flat wire stator with an ultra-low end, and the welding gap between the copper busbar terminals cannot be guaranteed by only clamping the copper busbar group unit from the outside, thereby affecting the final welding quality.

[0005] The present invention provides a line dividing block, comprising a line dividing block main body and a first dividing part;

[0006] The main body of the line dividing block is arranged along the radial direction of the flat wire motor disc;

[0007] The two side surfaces of the main body of the line dividing block are provided with limiting surfaces or limiting lines, and the limiting surfaces or limiting lines are used to abut against the side surfaces of two groups of copper bars adjacent to each other in the circumferential direction;

[0008] The first dividing portion is arranged on at least one side of the main body of the branching block, and protrudes from the main body of the branching block in the circumferential direction; the first dividing portion includes a plurality of first dividing blocks arranged at intervals along the radial direction, and the first dividing blocks are used to be inserted into the welding gap between two radially adjacent copper bus terminals when the branching block moves downward.

[0009] Furthermore, the left and right side surfaces of the main body of the wiring block also include second inclined surfaces, which extend upward from the lower end of the main body of the wiring block toward the side surface of the copper bar on the same side and are connected to the limiting surface or limiting line.

[0010] Furthermore, the left and right side surfaces of the main body of the wiring block also include a first inclined surface, which extends downward from the upper end of the main body of the wiring block toward the side surface of the copper busbar on the same side and is connected to the limiting surface or limiting line.

[0011] Furthermore, interference avoiding surfaces are provided on the upper left and right sides of the main body of the wiring block, and the interference avoiding surfaces are located above the first partition part, and are used to prevent the main body of the wiring block from colliding with the welding protrusion when the main body of the wiring block moves upward after welding.

[0012] Furthermore, the first partition is attached to the second inclined surface, extends upward over the limiting surface or the limiting line, and protrudes from the limiting surface or the limiting line.

[0013] Furthermore, the first dividing block includes an upper inclined unit and a lower inclined unit, the lower inclined unit extends and tilts from bottom to top toward the side of the copper bar on the same side, and the upper inclined unit extends and tilts from top to bottom toward the side of the copper bar on the same side, and the upper inclined unit and the lower inclined unit intersect.

[0014] Furthermore, the lower tilting unit is provided with a V-shaped protrusion for facilitating the downward insertion of the main body of the branching block.

[0015] The present invention also provides a welding clamping tool, comprising the above-mentioned line dividing block, and also comprising a clamping claw and a sliding mechanism;

[0016] The clamp comprises a first clamp and a second clamp respectively located on both sides of the wire splitting block, the first clamp comprises a rod portion arranged along the radial direction of the flat wire motor disk, and a second supporting connection portion arranged at one end of the rod portion; a plurality of clamping grooves are arranged at intervals on the side of the rod portion facing the wire splitting block; during welding, the clamping grooves are used to clamp and limit the two radially adjacent copper bars to be welded;

[0017] The sliding mechanism is used to drive the first clamping jaw and the second clamping jaw to move toward each other so as to clamp a plurality of copper bar group units.

[0018] Furthermore, the clamping groove includes a groove bottom, and protrusions are arranged on both sides of the groove bottom, and the protrusions are used to limit and clamp two copper bars of a single copper bar group unit during welding; the groove bottom is provided with a second dividing block corresponding to the first dividing block, and during welding, the second dividing block is inserted between two radially adjacent copper bars to be welded.

[0019] The present invention also provides a positioning method for a welding clamping tool, comprising the following steps:

[0020] The line dividing block moves downward, and the main body of the line dividing block moves downward to separate two circumferentially adjacent copper bars, and at the same time, a plurality of first separation blocks are inserted into the welding gap between two radially adjacent copper bar terminals;

[0021] By manipulating the sliding mechanism, the first clamp and the second clamp are simultaneously moved closer to the middle wire dividing block, and the limiting surface or the limiting line abuts against the side surfaces of two adjacent groups of copper bars in the circumferential direction, and then the plurality of copper bar group units are clamped by cooperating with the first dividing block, the clamping groove and the protrusion;

[0022] After welding, the sliding mechanism is operated to make the first clamping jaw and the second clamping jaw move away from the branching block. In addition, the branching block is withdrawn upward from the welding protrusion of the copper wire terminal through the interference avoiding surface arranged on the side.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention separates two circumferentially adjacent copper bars by moving the main body of the line dividing block downward, and then sets limiting surfaces or limiting lines on the two side surfaces of the main body of the line dividing block for abutting the side surfaces of two circumferentially adjacent groups of copper bars. When the line dividing block moves downward, the first separating block can be inserted into the welding gap between two radially adjacent copper bar terminals;

[0025] 2. The welding clamping tool of the present invention abuts the side surfaces of two groups of copper bars adjacent to each other in the circumferential direction through the limiting surface or the limiting line, and then clamps a plurality of copper bar group units by cooperating with the first partition block, the clamping groove and the protrusion, and then drives the two clamping claws to move toward each other through the sliding mechanism to clamp the plurality of copper bar group units. When the branching block moves downward, the first partition block is inserted into the welding gap between two radially adjacent copper bar terminals to ensure that the two copper bar terminals are clamped and that there is a suitable welding gap, so that no axial movement occurs during welding, the welding quality is ensured, and welding spatter can be effectively prevented;

[0026] 3. The positioning method of the welding clamping tool of the present invention first moves the wire dividing block downward to position it from the middle of the copper bar group unit, and then clamps multiple copper bar group units at the same time through the first clamping jaw and the second clamping jaw cooperating therewith, abuts the side surfaces of two adjacent groups of copper bars in the circumferential direction through the limiting surface or the limiting line, and then clamps the multiple copper bar group units through the cooperation with the first dividing block, the clamping groove and the protrusion, so that the welding accuracy is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the line distribution block of the present invention;

[0028] Figure 2 A top view of the wiring block of the present invention;

[0029] Figure 3 It is a side view of the wiring block of the present invention;

[0030] Figure 4 A top view of the clamping jaws of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the line dividing block and the clamping claw of the present invention;

[0032] Figure 6 A top view of the line dividing block and the clamping jaws of the present invention;

[0033] Figure 7 It is a top view of the branching block, the clamping claw and the copper bus terminal of the present invention;

[0034] Figure 8 for Figure 7 The enlarged schematic diagram at A in the middle;

[0035] Fig. 9 It is a structural schematic diagram of a welding clamping tool implemented in the present invention;

[0036] Fig.10 It is a structural schematic diagram of the welding clamping fixture and the flat wire stator winding structure of the present invention;

[0037] Fig.11 for Fig.10 The enlarged schematic diagram of point B in the middle;

[0038] Figure numerals: 1. branching block; 11. branching block main body; 111. first inclined surface; 112. second inclined surface; 113. interference avoiding surface; 114. limit line; 12. first partition; 121. upper inclined unit; 122. lower inclined unit; 1221. V-shaped protrusion; 13. first supporting connection; 2. clamping claw; 21. rod; 211. clamping groove; 2111. groove bottom; 2112. second dividing block; 212. protrusion; 22. second supporting connection; 3. sliding mechanism; 31. first base; 32. second base; 33. sliding positioning pin; 34. assembly base plate; 4. flat wire stator winding structure; 41. copper bar row group unit. DETAILED DESCRIPTION

[0039] In order to further understand the content, features and effects of the present invention, the following embodiments are given together with the attached Figures 1 to 11 The detailed instructions are as follows.

[0040] like Figures 1 to 3 As shown, an embodiment of the present invention provides a line dividing block 1, comprising a line dividing block main body 11 and a first dividing portion 12;

[0041] The main body 11 of the line dividing block is arranged along the radial direction of the flat wire motor disk;

[0042] Limiting lines 114 are provided on both sides of the main body 11 of the line dividing block, and the limiting lines 114 are used to abut against the side surfaces of two groups of copper bars adjacent to each other in the circumferential direction, wherein the limiting lines 114 can also be replaced by limiting surfaces with a certain height;

[0043] The first partitioning portion 12 is arranged on the left and right side surfaces of the main body 11 of the branching block, and of course it can also be arranged on only one of the side surfaces, and protrudes from the main body 11 of the branching block along the circumferential direction; the first partitioning portion 12 includes a plurality of first partitioning blocks arranged at intervals along the radial direction, and the first partitioning block is used to be inserted into the welding gap between two radially adjacent copper bus terminals when the branching block 1 moves downward.

[0044] The present invention separates two circumferentially adjacent copper bars by moving the main body of the dividing block downward, and then sets limiting surfaces or limiting lines on the two side surfaces of the main body of the dividing block for abutting the side surfaces of two circumferentially adjacent groups of copper bars. When the dividing block moves downward, the first separating block can be inserted into the welding gap between two radially adjacent copper bar terminals.

[0045] In this embodiment, Figures 1 to 3 As shown, the left and right side surfaces of the main body 11 of the wiring breakout block also include a second inclined surface 112, which extends upward from the lower end of the main body 11 of the wiring breakout block and is inclined toward the side surface of the copper busbar on the same side, and is connected to the limiting line 114, so as to facilitate the downward movement of the main body 11 of the wiring breakout block, thereby separating two adjacent copper buses in the circumferential direction.

[0046] In this embodiment, Figures 1 to 3 As shown, the left and right side surfaces of the main body 11 of the wiring breakout block also include a first inclined surface 111, which extends downward from the upper end of the main body 11 of the wiring breakout block and is inclined toward the side of the copper busbar on the same side, and is connected to a limit line 114, wherein the limit line 114 serves as a dividing line between the first inclined surface 111 and the second inclined surface 112, facilitating the upward movement of the main body 11 of the wiring breakout block.

[0047] In this embodiment, Figures 1 to 3 As shown, interference avoiding surfaces 113 are provided on the upper left and right sides of the main body 11 of the wiring block, and the interference avoiding surfaces 113 are located above the first partition 12, and are used to avoid the collision between the main body 11 of the wiring block and the welding protrusion when the main body 11 of the wiring block moves upward after welding. The interference avoiding surfaces 113 are located at the upper end of the first inclined surface 111, and are partially truncated cone-shaped, and the upper diameter is larger than the lower diameter.

[0048] In this embodiment, Figure 1 As shown, the first partition 12 is attached to the second inclined surface 112 and extends upward over the limit line 114 and protrudes from the limit line 114, thus ensuring that the purpose of pressing the copper busbar group unit can be better achieved.

[0049] In this embodiment, Figure 1As shown, the first dividing block includes an upper inclined unit 121 and a lower inclined unit 122. The lower inclined unit 122 extends and tilts from bottom to top toward the side of the copper busbar on the same side, and the upper inclined unit 121 extends and tilts from top to bottom toward the side of the copper busbar on the same side. The upper inclined unit 121 and the lower inclined unit 122 intersect. In this embodiment, the upper inclined unit 121 includes a first triangular cone surface, and the lower inclined unit 122 includes a second triangular cone surface and a third cone surface. The first cone surface is symmetrically arranged along the intersection line of the second cone surface and the third cone surface. By setting the upper and lower inclined units, the main body 11 of the dividing block can be easily moved up and down.

[0050] In this embodiment, Figure 3 As shown, the lower tilting unit 122 is provided with a V-shaped protrusion 1221 for facilitating the downward insertion of the main body 11 of the wiring block, which includes the intersection of the second conical surface and the third conical surface. The second conical surface and the third conical surface are arranged symmetrically about the center line of the V-shaped protrusion 1221 to facilitate the overall downward movement of the wiring block 1.

[0051] like Figures 4 to 9 As shown, the present invention also provides a welding clamping tool, which includes not only the above-mentioned line dividing block 1, but also a clamping claw 2 and a sliding mechanism 3;

[0052] The clamping jaw 2 includes a first clamping jaw and a second clamping jaw respectively located on both sides of the wire splitting block. The first clamping jaw includes a rod portion 21 arranged along the radial direction of the flat wire motor disk body, and a second supporting connection portion 22 arranged at one end of the rod portion 21. The rod portion 21 is provided with a plurality of clamping grooves 211 at intervals on the side of the wire splitting block 1. When welding, the clamping grooves 211 are used to clamp and limit the two radially adjacent copper bars to be welded.

[0053] The sliding mechanism 3 is used to drive the first clamping jaw and the second clamping jaw to move toward each other, so as to approach the clamping jaw 2, thereby clamping the plurality of copper bar group units 41.

[0054] The welding clamping tool of the present invention abuts the side surfaces of two circumferentially adjacent groups of copper bars through a limiting surface or a limiting line, and then clamps a plurality of copper bar group units through cooperation with the first dividing block, the clamping groove and the protrusion, and then drives the two clamping jaws to move toward each other through the sliding mechanism to clamp the plurality of copper bar group units. When the branching block moves downward, the first dividing block is inserted into the welding gap between two radially adjacent copper bar terminals to ensure that the two copper bar terminals are clamped and that there is a suitable welding gap, thereby ensuring that no axial movement occurs during welding, ensuring the welding quality, and effectively preventing welding spatter.

[0055] In this embodiment, Figure 3 , 4As shown in Figure 9, the sliding mechanism 3 includes two first bases 31 fixedly arranged under the clamping jaws 2, and a second base 32 fixedly arranged on the branching block 1. The branching block 1 also includes a first supporting connection portion 13 connected to the second base 32 at an end thereof, and the clamping jaws 2 also includes a second supporting connection portion 22 connected to the first base 31 at an end thereof. The first base 31 and the second base 32 are connected as a whole by a sliding positioning pin 33 transversely penetrated therein. The end of the second base 32 away from the branching block 1 is fixedly arranged on an assembly base plate 34, and the assembly base plate 34 is fixedly arranged on a robotic arm. The robotic arm drives the sliding mechanism 3, the clamping jaws 2 and the branching block 1 to move as a whole, thereby bringing them to the copper bar group unit 4. Independent driving cylinders (not shown in the figure) are arranged at both ends of the first base 31 and the second base 32. The driving cylinder drives the first bases 31 on both sides to approach the second base 32 in the middle simultaneously and at the same speed along the sliding positioning pin 33, thereby driving the clamping jaws 2 on both sides to move simultaneously toward the branching block 1 located in the middle position and clamp the copper bar group unit 41.

[0056] In this embodiment, Figure 4 As shown, the clamping groove 211 includes a groove bottom 2111, and protrusions 212 are arranged on both sides of the groove bottom 2111. The number of the protrusions 212 is 3, and they are approximately conical. The protrusions 212 are used to limit and clamp the two copper bars of the single copper bar group unit 41 during welding; the groove bottom 2111 is provided with a second dividing block 2112 corresponding to the first dividing block, wherein the groove bottom 2111 is arc-shaped, and the second dividing block 2112 is a straight line connecting the left and right groove bottoms 2111. The second dividing block 2112 is used to ensure that there is a suitable welding gap between the two copper bar terminals. During welding, the second dividing block 2112 is inserted between two radially adjacent copper bars to be welded.

[0057] like Figures 10-11 As shown, the present invention also provides a positioning method for a welding clamping tool, comprising the following steps:

[0058] S1. The entire welding fixture (including the wire splitter block 1) is driven downward by a mechanical arm, and the main body 11 of the wire splitter block is moved downward to separate two circumferentially adjacent copper bars, and at the same time, eight first separation blocks are inserted into the welding gap between two radially adjacent copper bar terminals;

[0059] S2, by manipulating the sliding mechanism 3, the first clamp and the second clamp simultaneously approach the wiring block 1 located in the middle, and the limiting line 114 abuts against the side surfaces of two adjacent groups of copper bars in the circumferential direction, and then the plurality of copper bar group units 41 are clamped by cooperating with the first partition block, the clamping groove 211 and the protrusion 212;

[0060] S3. After welding, the sliding mechanism 3 is operated to make the first clamping jaw and the second clamping jaw move away from the branching block 1. In addition, the branching block 1 is withdrawn upward from the welding protrusion of the copper wire terminal through the interference avoidance surface arranged on the side.

[0061] In this embodiment, the weld gap between the two copper wire terminals in the copper bar group unit 41 is 0.2-0.5 mm, and its size is detected by the laser visual inspection module to determine whether it is qualified. Generally, after the two copper bar terminals are clamped, the upper and lower ends of the two copper bar terminals are flush. If the laser visual inspection module detects that the upper and lower ends are not flush, the end faces of the two copper bar terminals can be pressed to the same height by a push plate (not shown in the figure) to make them flush in the height direction.

[0062] The positioning method of the welding clamping tool of the present invention first moves the wire dividing block downward to position it from the middle of the copper bar group unit, and then clamps multiple copper bar group units at the same time through the first clamping jaw and the second clamping jaw cooperating therewith, abuts the side surfaces of two adjacent groups of copper bars in the circumferential direction through the limiting surface or the limiting line, and then clamps the multiple copper bar group units through the cooperation with the first dividing block, the clamping groove and the protrusion, so that the welding accuracy is higher.

[0063] The invention described above only expresses the implementation methods of the embodiments of the present invention, and cannot be understood as limiting the scope of the invention patent, nor does it impose any form of limitation on the structure of the embodiments of the present invention. It should be pointed out that for ordinary technicians in this field, several changes and improvements can be made without departing from the concept of the embodiments of the present invention, which all belong to the protection scope of the embodiments of the present invention.

Claims

1. A line splitter block, characterized in that: It comprises a line dividing block main body (11) and a first dividing part (12); The main body (11) of the line dividing block is arranged along the radial direction of the flat wire motor disk; The two side surfaces of the main body (11) of the line dividing block are provided with limiting surfaces or limiting lines, and the limiting surfaces or limiting lines are used to abut against the side surfaces of two groups of copper bars adjacent in the circumferential direction; The first partition (12) is arranged on at least one side surface of the main body (11) of the branching block, and protrudes from the main body (11) of the branching block in the circumferential direction; the first partition (12) comprises a plurality of first partition blocks arranged at intervals in the radial direction, and the first partition blocks are used to be inserted into the welding gap between two radially adjacent copper bus terminals when the branching block (1) moves downward.

2. A line splitter block as claimed in claim 1, characterized in that: The left and right side surfaces of the main body (11) of the wiring block further include a second inclined surface (112), which extends upward from the lower end of the main body (11) of the wiring block and is inclined toward the side surface of the copper bar on the same side, and is connected to the limiting surface or limiting line.

3. A line splitter block as claimed in claim 1, characterized in that: The left and right side surfaces of the main body (11) of the wiring block further include a first inclined surface (111), which extends downward from the upper end of the main body (11) of the wiring block and is inclined toward the side surface of the copper bar on the same side, and is connected to the limiting surface or limiting line.

4. A line splitter block as claimed in claim 1 or 2, characterized in that: The upper parts of the left and right sides of the main body (11) of the line dividing block are provided with interference avoiding surfaces (113), and the interference avoiding surfaces (113) are located above the first partition (12) and are used to avoid the main body (11) of the line dividing block from colliding with the welding protrusion when the main body (11) of the line dividing block moves upward after welding.

5. A line splitter block as claimed in claim 2, characterized in that: The first partition (12) is attached to the second inclined surface (112), extends upwards beyond the limiting surface or the limiting line, and protrudes from the limiting surface or the limiting line.

6. A line splitter block as claimed in claim 1, 2 or 3, characterized in that: The first partition block comprises an upper inclined unit (121) and a lower inclined unit (122), wherein the lower inclined unit (122) extends and inclines from bottom to top toward the side of the copper bar on the same side, and the upper inclined unit (121) extends and inclines from top to bottom toward the side of the copper bar on the same side, and the upper inclined unit (121) and the lower inclined unit (122) intersect.

7. A line splitter block as claimed in claim 6, characterized in that: The lower tilting unit (122) is provided with a V-shaped protrusion (1221) for facilitating the downward insertion of the main body (11) of the line dividing block.

8. A welding fixture, characterized in that: It comprises a branching block as claimed in any one of claims 1 to 7, and further comprises a clamping claw (2) and a sliding mechanism (3); The clamping jaw (2) comprises a first clamping jaw and a second clamping jaw respectively located on both sides of the wire splitting block, the first clamping jaw comprising a rod portion (21) arranged along the radial direction of the flat wire motor disk body, and a second supporting connection portion (22) arranged at one end of the rod portion (21); a plurality of clamping grooves (211) are arranged at intervals on the side of the rod portion (21) facing the wire splitting block (1); during welding, the clamping grooves (211) are used to clamp and limit the position of two radially adjacent copper bars to be welded; The sliding mechanism (3) is used to drive the first clamping jaw and the second clamping jaw to move toward each other so as to clamp a plurality of copper bar group units (41).

9. A welding fixture as claimed in claim 8, characterized in that: The clamping groove (211) comprises a groove bottom (2111), and protrusions (212) are arranged on both sides of the groove bottom (2111), and the protrusions (212) are used to limit and clamp two copper bars of a single copper bar group unit (41) during welding; the groove bottom (2111) is provided with a second partition block (2112) corresponding to the first partition block, and during welding, the second partition block (2112) is inserted between two radially adjacent copper bars to be welded.

10. A positioning method using the welding fixture as claimed in claim 8, characterized in that: The following steps are involved: The line dividing block (1) moves downward, and the line dividing block main body (11) moves downward to separate two circumferentially adjacent copper bars, while a plurality of first separation blocks are inserted into the welding gap between two radially adjacent copper bar terminals; The first clamping jaw and the second clamping jaw are simultaneously moved toward the middle line dividing block (1) by manipulating the sliding mechanism (3), and the side surfaces of two adjacent groups of copper bars are abutted against each other through the limiting surface or the limiting line, and then the plurality of copper bar group units (41) are clamped by cooperating with the first dividing block, the clamping groove (211) and the protrusion (212); After welding, the sliding mechanism (3) is operated to move the first clamping jaw and the second clamping jaw away from the branching block (1), and the branching block (1) is withdrawn upward from the side of the copper wire terminal welding protrusion through the interference avoiding surface (113) arranged on the side.

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