Busbar positioning device and busbar positioning method

Abstract

To provide a busbar positioning method capable of properly assembling a board to the tip of each busbar column while positioning multiple busbars.SOLUTION: In three busbars erected as wiring conductors of a motor (electrical equipment), the width direction of columns is defined as an X direction, and the thickness direction of the columns is defined as a Y direction. In a temporary positioning step S1, the busbars are temporarily positioned while holding the board connection parts of the multiple busbars from both sides in the X direction by a primary chuck installed at the height corresponding to the board connection part. In a main positioning step S2, while the board connection part is temporarily positioned by the primary chuck, the busbars are positioned while the columns are clamped in the Y direction by a secondary chuck installed individually for each busbar at a height corresponding to the column. In a board assembly step S3, after releasing the primary chuck while the columns are being held by the secondary chuck and moving away from a region that interferes with the board, the board is assembled so that the board connection part is inserted into the insertion hole of the board.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to an apparatus and method for positioning a bus bar that is erected as a wiring conductor for an electric device such as a motor. [Background technology]

[0002] For example, in an electromechanically integrated motor in which the motor and control unit are integrated, the terminal wires of the motor windings are inserted into insertion holes in a control unit board and electrically connected by soldering or the like. In the case of a three-phase motor, the terminal wires of the three phases arranged in parallel are connected to the board. For example, in the electromechanically integrated motor of an electric power steering device disclosed in Patent Document 1, the lead wires of each winding set are inserted into lead wire insertion holes in the rear frame and connected to the board of the control unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-187078 A Summary of the Invention [Problem to be solved by the invention]

[0004] The three lead wires per system shown in Figures 3 and 9 of Patent Document 1 are round wires with a relatively small diameter, and the positional variation of their tips is relatively small. Even if the round wires are adjacent to the wall of the motor, it is easy to ensure space for inserting a positioning chuck mechanism between the thin round wires and the wall. Therefore, it is possible to properly assemble a board to the tips of the round wires while positioning the multiple round wires.

[0005] In contrast, a configuration is assumed in which multiple bus bars made of copper or copper alloy plate material processed into an L-shape are used as wiring conductors. The part corresponding to the horizontal bar of the L shape is represented as the base, and the part corresponding to the vertical bar of the L shape is represented as the column. In this configuration, the positional variation of the column tip becomes large due to the squareness accuracy of the column with respect to the base. In addition, if the column of the bus bar is adjacent to the wall of the motor and there is not enough space between the column and the wall, the positioning chuck mechanism cannot be inserted if the column tilts toward the wall. This makes it difficult to assemble a board to the column tip of the bus bar while positioning the multiple bus bars.

[0006] The present invention has been created in consideration of these points, and its object is to provide a busbar positioning device and a busbar positioning method that can position multiple busbars and properly assemble a circuit board to the tip of the post portion of each busbar. [Means for solving the problem]

[0007] A first aspect of the present invention is a device for positioning a plurality of bus bars (81, 82, 83) erected as wiring conductors for an electrical device (100) such that the positions of board connection portions (87) formed at the tips of column portions (85) of the plurality of bus bars match the positions of a corresponding plurality of insertion holes (71, 72, 73) in a board (70).

[0008] The bus bars are arranged side by side in a thickness direction perpendicular to the width direction so that the width directions of the columns are parallel to each other. The width direction of the columns is defined as the X direction, and the thickness direction of the columns is defined as the Y direction. This bus bar positioning device includes a primary chuck (50) and a secondary chuck (60).

[0009] The primary chuck collectively clamps the board connection portions of multiple busbars from both sides in the X direction at a height corresponding to the board connection portions, temporarily positioning the busbars. The secondary chucks are provided individually for each busbar at a height corresponding to the column portions, and clamp the column portions in the Y direction with the board connection portions clamped by the primary chucks, finally positioning the busbars.

[0010] Here, the wall of the motor does not exist within the height range in which the primary chuck operates, and the primary chuck can operate freely. By suppressing large positional deviation of the busbar through temporary positioning by the primary chuck, a space is secured between the column and the wall of the motor in which the secondary chuck can be inserted. Then, it becomes possible to assemble the board to the board connection portion while the secondary chuck is finally positioning the busbar. In this way, in the present invention, by positioning the busbar in two stages, the board can be properly assembled to the board connection portion at the tip of the column of each busbar.

[0011] A second aspect of the present invention is a method for positioning a plurality of bus bars (81, 82, 83) erected as wiring conductors for an electrical device (100) such that the positions of board connection portions (87) formed at the tips of column portions (85) of the plurality of bus bars match the positions of corresponding insertion holes (71, 72, 73) in a board (70).

[0012] The bus bars are arranged side by side in a thickness direction perpendicular to the width direction so that the width directions of the columns are parallel to each other. The width direction of the columns is defined as the X direction, and the thickness direction of the columns is defined as the Y direction. This bus bar positioning method includes a temporary positioning step (S1), a final positioning step (S2), and a board assembly step (S3).

[0013] In the provisional positioning stage, the board connection portions of the multiple bus bars are clamped collectively from both sides in the X direction by primary chucks (50) provided at a height corresponding to the board connection portions, thereby provisionally positioning the bus bars.

[0014] In the actual positioning stage, with the board connection portion temporarily positioned by the primary chuck, the column portion is clamped in the Y direction by a secondary chuck (60) provided individually for each bus bar at a height corresponding to the column portion, and the bus bar is finally positioned.

[0015] In the board assembly stage, the primary chuck is released while the column is held by the secondary chuck to move it away from the area where it interferes with the board, and then the board is assembled so that the board connection parts are inserted into the insertion holes of the board. This provides the same effect as the bus bar positioning device. [Brief description of the drawings]

[0016] [Figure 1] 1 is a cross-sectional view of a motor including a busbar terminal wire, which is a target workpiece of a busbar positioning device according to an embodiment of the present invention. [Diagram 2] (a) is a cross-sectional view taken along line IIa-IIa in FIG. 1 (plan view of the rear frame), and (b) is a cross-sectional view taken along line IIb-IIb in FIG. 2(a). [Diagram 3] FIG. [Figure 4] Schematic diagram of an expanded bus bar. [Diagram 5] 1A is a plan view of a chucked state, and FIG. 1B is a cross-sectional view illustrating the positioning of a round wire terminal as a target workpiece in a comparative example. [Figure 6] FIG. 1 is a schematic diagram illustrating a problem regarding positioning of a busbar type terminal wire. [Figure 7] 7(a) is a plan view of the provisional positioning stage (1), and (b) is a cross-sectional view taken along line VIIb-VIIb in FIG. 7(a). [Figure 8] 8(a) is a plan view of the tentative positioning step (2), and (b) is a cross-sectional view taken along line VIIIb-VIIIb in FIG. 8(a). [Figure 9] 9(a) is a plan view of this positioning step (1), and (b) is a cross-sectional view taken along line IXb-IXb in FIG. 9(a). [Figure 10] 10(a) is a plan view of this positioning step (2), and (b) is a cross-sectional view taken along line Xb-Xb in FIG. 10(a). [Figure 11] FIG. 3 is a cross-sectional view corresponding to FIG. 2(b) at the board assembly stage. [Figure 12] 4 is a flow chart of a busbar positioning method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] (One embodiment) A busbar positioning device and a busbar positioning method according to an embodiment of the present invention will be described with reference to the drawings. This device positions a number of busbars in the preparation stage for assembling a circuit board to the tips of the column portions of the busbars erected as wiring conductors for an electric device. Each busbar has a circuit board connection portion formed at the tip of the column portion. A number of insertion holes corresponding to each busbar are provided in the circuit board. The busbar positioning device positions the multiple busbars so that the positions of the circuit board connection portions of the multiple busbars match the positions of the corresponding insertion holes in the circuit board.

[0018] The electric device in this embodiment is a three-phase motor, and three bus bars are provided as terminal wires of the motor windings of the U-phase, V-phase, and W-phase. This three-phase motor is a so-called electromechanically integrated motor, in which a control unit that controls the current supply to the windings is integrally provided on one side of the motor in the axial direction. The three bus bars are inserted into insertion holes in a control unit board and electrically connected by soldering or the like. These bus bar type terminal wires are the target workpiece of the bus bar positioning device.

[0019] The schematic configuration of the motor will be described with reference to Fig. 1. The mechanically and electrically integrated motor 100 is a three-phase brushless motor used as a steering assist motor in an electric power steering device, similar to the motor disclosed in Patent Document 1 (JP Patent Publication 2019-187078). The mechanically and electrically integrated motor 100 is provided integrally with a control unit 10 on one side of a motor section 90 in the axial direction.

[0020] The motor section 90 includes a stator 92 around which three-phase motor windings are wound, and a rotor 93 that is disposed inside the stator 92 and has a plurality of permanent magnets provided on its outer periphery. The rotor 93 rotates about a shaft 94 due to a rotating magnetic field formed in the stator 92. The shaft 94 has an end on the output side (lower side in FIG. 1) supported by a bearing fixed to the front frame 91, and an end on the control unit 10 side supported by a bearing fixed to the rear frame 95.

[0021] A board 70 of the control unit 10, on which electronic elements are mounted, is provided on the end face of the rear frame 95 opposite to the motor section 90. The bus bars 81, 82, 83 are erected on the radially outer side of the rear frame 95 and include a relatively wide column section 85 and a relatively narrow board connection section 87 formed at the tip of the column section 85. The board connection sections 87 of the bus bars 81, 82, 83 are inserted into insertion holes 71, 72, 73 of the board 70 and are electrically connected to the board 70. After the assembly and wiring of the board 70 are completed, a cover 17 shown by dashed lines is attached to the peripheral edge of the rear frame 95.

[0022] Next, the configurations of the rear frame 95, the substrate 70, and the bus bars 81, 82, and 83 will be described with reference to Figs. 2 to 4. However, illustrations and descriptions of matters not directly related to this embodiment will be omitted. Fig. 2 shows a plan view and an axial cross-sectional view of the rear frame 95 corresponding to the IIa-IIa cross section in Fig. 1. Fig. 3 shows a plan view of the substrate 70. Fig. 4 shows a development view of the bus bars 81, 82, and 83. Note that the length and shape of the bottom portions 84 of the bus bars 81, 82, and 83 are different, but these small differences will be ignored and only a comprehensive image will be described here.

[0023] At the stage of assembling the board 70, the board 70 is installed on the top side in the vertical direction as shown in Fig. 1 and Fig. 2(b). In the description of this embodiment, for convenience, this installation direction is used as the reference, and the board 70 side is described as the upper side and the rear frame 95 side is described as the lower side. In Fig. 2(a), a virtual line passing through the central axis O and extending toward the connector C side is referred to as a Y-axis reference line Yo, and a virtual line passing through the central axis O and perpendicular to the Y-axis reference line Yo is referred to as an X-axis reference line Xo. Fig. 2(b) is a cross-sectional view taken along the X-axis reference line Xo.

[0024] 2(b), rear frame 95 is a platform with a high central portion, and a wall portion 955 is formed at the boundary with a thin plate portion provided near radial outer edge 954. A wiring hole 956 communicating with the inside of rear frame 95 is formed immediately below wall portion 955. Insulating grommets 96 supporting pillar portions 85 of bus bars 81, 82, and 83 are attached to wiring hole 956. Boss portions 957 forming bearing surfaces for substrate 70 are provided at multiple locations (for example, four locations) on the upper surface of rear frame 95. A female thread for fastening a mounting screw is formed at the center of boss portion 957.

[0025] The bus bars 81, 82, and 83 are erected between an outer edge 954 of the rear frame 95 and a wall portion 955, with the lower portions of the pillar portions 85 supported by insulating grommets 96. The three bus bars 81, 82, and 83 are arranged side by side in a thickness direction perpendicular to the width direction so that the width directions of the pillar portions 85 are parallel to each other. Hereinafter, the width direction of the pillar portions 85 is defined as the X direction, and the thickness direction of the pillar portions 85 is defined as the Y direction. In the arrangement example shown in FIG. 2(a), the direction parallel to the X-axis reference line Xo is the X direction, and the direction parallel to the Y-axis reference line Yo is the Y direction.

[0026] 3, in the board 70, insertion holes 71, 72, 73 are formed at positions corresponding to the board connection portion 87 when the bus bars 81, 82, 83 are arranged in the normal positions as designed. In other words, the positions of the bus bars 81, 82, 83 when the board connection portion 87 matches the positions of the insertion holes 71, 72, 73 of the board 70 are the normal positions. In addition, a screw hole 77 for fastening a mounting screw is formed at a position corresponding to the center of a boss portion 957 of the rear frame 95.

[0027] As shown in Fig. 4, bus bars 81, 82, and 83, which are wiring conductors, are processed into an L-shape from copper or copper alloy plate material. The part corresponding to the horizontal bar of the L-shape is a base portion 84, and the part corresponding to the vertical bar of the L-shape is a column portion 85. A locking claw for locking the winding is provided on the base portion 84. As shown in Fig. 2(a), the base portion 84 is bent along the arc of the stator. A relatively narrow board connection portion 87 is provided at the tip of the relatively wide column portion 85, with a step portion 86 interposed therebetween.

[0028] Next, with reference to Figures 5 and 6, the issues regarding the positioning of the busbar-type terminal wire will be described in comparison with a target workpiece of a comparative example. Figures 5(b) and 6 are cross-sectional views of the rear frame 95 corresponding to an enlarged view of the left part of Figure 2(b). Figure 5(a) is a diagram showing a chuck mechanism for positioning a round-wire-type terminal wire, which is a target workpiece of the comparative example.

[0029] 5(b), the round wire type terminal wire, which is the target workpiece of the comparative example, has a round wire 89 that stands straight upright from inside the rear frame 95, so the positional variation Err of the tip is relatively small. In addition, since the diameter of the round wire 89 is relatively small, a sufficient space sp for inserting the chuck mechanism 69 can be secured between the round wire 89 and the adjacent wall portion 955. Therefore, with the round wire 89 positioned at the correct position by the chuck mechanism 69, the board 70 is assembled so that the tip of the round wire 89 is inserted into the insertion holes 71, 72, and 73 of the board 70.

[0030] On the other hand, as shown in Fig. 6, the busbar terminal wire, which is the target workpiece of this embodiment, has a pillar portion 85 that is bent and erected from an L-shaped bottom side portion 84, so that the positional variation Err of the board connection portion 87 becomes large due to the accuracy of squareness, etc. In addition, since the width dimension of the pillar portion 85 is large, a sufficient space sp cannot be secured between the pillar portion 85 and the adjacent wall portion 955. If the pillar portion 85 is inclined toward the wall portion 955 as shown by the dashed line, it becomes impossible to insert a positioning chuck mechanism between the pillar portion 85 and the wall portion 955. Therefore, it becomes difficult to assemble the board 70 so that the board connection portion 87 is inserted into the insertion holes 71, 72, 73 of the board 70 while positioning the busbars 81, 82, 83.

[0031] It is also assumed that the pillar portion 85 may be tilted to the side opposite to the wall portion 955. Even in that case, for example, if the pillar portion 85 is tilted to a position where it is out of the notch groove of the chuck mechanism, the chuck mechanism and the pillar portion 85 may interfere with each other, causing a problem that chucking cannot be performed normally.

[0032] Therefore, this embodiment provides a busbar positioning device and a busbar positioning method that can position busbars 81, 82, and 83 and properly assemble board 70 to board connection portions 87 of each busbar 81, 82, and 83. In particular, this embodiment is intended to be applied to a workpiece in which busbars 81, 82, and 83 are adjacent to wall portion 955.

[0033] 7 to 12, the configuration of the busbar positioning device of this embodiment and each stage of the busbar positioning method using this device will be described. This busbar positioning device includes a primary chuck 50 and a secondary chuck 60. As shown in the flowchart of Fig. 12, this busbar positioning method includes a temporary positioning stage S1 using the primary chuck 50, a main positioning stage S2 using the secondary chuck 60, and a substrate assembling stage S3. The stage symbol "S" denotes a step.

[0034] 7 and 8, the configuration of primary chuck 50 and temporary positioning step S1 will be mainly described. Primary chuck 50 collectively clamps substrate connection portions 87 of three bus bars 81, 82, 83 from both sides in the X direction at a height corresponding to substrate connection portions 87, and temporarily positions bus bars 81, 82, 83. Here, a straight line in the Y direction connecting substrate connection portions 87 of each bus bar 81, 82, 83 in the correct position is represented as a line of symmetry Sy.

[0035] The primary chuck 50 has a pair of shutter plates 55, 56. With respect to the central axis O of the motor as a reference, the outer shutter plate is referred to as the outer shutter plate 55 and the inner shutter plate is referred to as the inner shutter plate 56. The outer shutter plate 55 and the inner shutter plate 56 are disposed at different heights and open and close in the X direction across the line of symmetry Sy. Here, since there is no wall portion 955 within the height range in which the primary chuck 50 operates, the primary chuck 50 can operate freely.

[0036] The outer shutter plate 55 has a plurality of valleys 571-573 (three in this example) formed on the side facing the bus bars 81, 82, and 83 in accordance with the number of board connection parts 87. The inner shutter plate 56 has a plurality of valleys 581-583 (three in this example) formed on the side facing the bus bars 81, 82, and 83 in accordance with the number of board connection parts 87. The positions and angles of the valleys 571-573 and 581-583 on the shutter plates 55 and 56 relative to the line of symmetry Sy are formed to be equal. In this example, the valleys 571-573 and 581-583 are formed symmetrically in the Y direction, and the included angle is 90°.

[0037] 7 shows a state at the start of temporary positioning with the shutter plates 55 and 56 open as "temporary positioning stage (1)". The valleys 571-573 and 581-583 of the outer shutter plate 55 and the inner shutter plate 56 face each other with the board connection portions 87 of the bus bars 81, 82, 83 in between.

[0038] 8 shows a state at the completion of the temporary positioning in which the shutter plates 55, 56 are closed as a "temporary positioning stage (2)". When the outer shutter plate 55 and the inner shutter plate 56 approach each other, the board connection portion 87 is sandwiched between the valley portions. That is, the board connection portion 87 of the first bus bar 81 is sandwiched between the first valley portion 571 of the outer shutter plate 55 and the first valley portion 581 of the inner shutter plate 56. The board connection portion 87 of the second bus bar 82 is sandwiched between the second valley portion 572 of the outer shutter plate 55 and the second valley portion 582 of the inner shutter plate 56. The board connection portion 87 of the third bus bar 83 is sandwiched between the third valley portion 573 of the outer shutter plate 55 and the third valley portion 583 of the inner shutter plate 56.

[0039] Even if the initial positions of the board connection portions 87 of the bus bars 81, 82, 83 are deviated from the correct positions, each bus bar 81, 82, 83 is suppressed from being significantly misaligned in the X and Y directions by being clamped by the shutter plates 55, 56 of the primary chuck 50. In particular, when the bus bars 81, 82, 83 are inclined toward the wall portion 955 of the rear frame 95, they are corrected to a substantially straight direction, thereby ensuring a space between the pillar portion 85 and the wall portion 955.

[0040] In the provisional positioning stage, the secondary chuck 60 waits radially outward of the rear frame 95. With regard to the operation of the secondary chuck 60, moving in the X direction from the standby position radially outward toward the bus bars 81, 82, and 83 is represented as "advancement," and returning from the advanced position to the standby position is represented as "retraction."

[0041] 9 and 10, the configuration of secondary chuck 60 and final positioning step S2 will be mainly described. Secondary chuck 60 is provided individually for each bus bar 81, 82, 83 at a height corresponding to column portion 85, that is, on the rear frame 95 side of substrate connection portion 87. Secondary chuck 60 clamps column portion 85 in the Y direction with substrate connection portion 87 clamped by primary chuck 50, and finally positions bus bars 81, 82, 83.

[0042] The secondary chuck 60 has three sets of chuck bars 61R / L, 62R / L, 63R / L that extend in the X direction with corresponding bus bars 81, 82, 83 sandwiched therebetween and advance and retreat in the X direction. The chuck bars on the right and left sides when viewed from the standby position in the forward direction are marked with "R" and "L" after the reference characters "61, 62, 63", respectively. The reference character of one set of chuck bars is marked as "R / L". The first chuck bar 61R / L corresponds to the first bus bar 81, the second chuck bar 62R / L corresponds to the second bus bar 82, and the third chuck bar 63R / L corresponds to the third bus bar 83.

[0043] In this embodiment, since the interval between the bus bars 81, 82, 83 is small relative to the width of each chuck bar in the Y direction, the chuck bars of adjacent pairs are arranged at different heights to avoid interference with each other. That is, the second chuck bar 62R / L in the middle is arranged on the relatively higher side, and the first chuck bar 61R / L and the third chuck bar 63R / L at both ends are arranged on the relatively lower side. In the illustration from the top view, the outline of the second chuck bar 62R / L is drawn with a relatively thick line, and the outline of the first chuck bar 61R / L and the third chuck bar 63R / L is drawn with a relatively thin line.

[0044] In each set of chuck bars 61R / L, 62R / L, 63R / L, the side surface on the corresponding bus bar 81, 82, 83 side is indicated as "opposing surface 64R / L" by a common reference numeral for the three sets. In Fig. 9 and Fig. 10, the second chuck bar 62R / L is indicated by the reference numeral "64R / L" as a representative. Each set of chuck bars 61R / L, 62R / L, 63R / L operates so that the opposing surfaces 64R / L approach or move away from each other in the Y direction.

[0045] A cutout groove 65 is formed on one of the opposing surfaces of a pair of chuck bars corresponding to each bus bar. In this embodiment, the cutout groove 65 is formed on the opposing surface 64R of each of the right chuck bars 61R, 62R, 63R. In Figs. 9 and 10, the opposing surface 64R of the second right chuck bar 62R is indicated with the symbol "65" as a representative. In other embodiments, the cutout groove may be formed on the left chuck bars 61L, 62L, 63L. Alternatively, cutout grooves of equal depths may be formed on both the right chuck bars 61R, 62R, 63R and the left chuck bars 61L, 62L, 63L.

[0046] As shown in FIG. 8, at the end of the provisional positioning stage S1, each set of chuck bars 61R / L, 62R / L, 63R / L is waiting in a position where the opposing surfaces 64R / L are separated from each other in the Y direction by a distance equal to or greater than the thickness of the column portion 85.

[0047] 9 shows a state in which each pair of chuck bars 61R / L, 62R / L, 63R / L advances from the standby position in the X direction as "full positioning stage (1)". Each pair of chuck bars 61R / L, 62R / L, 63R / L advances while avoiding collision with the column portion 85, with the opposing surfaces 64R / L spaced apart from each other in the Y direction. After advancing, the notch grooves 65 of each right chuck bar 61R, 62R, 63R reach a position directly beside the column portion 85 of each bus bar 81, 82, 83. At this time, since the board connection portion 87 of each bus bar 81, 82, 83 is provisionally positioned by the primary chuck 50, a gap for the secondary chuck 60 is appropriately secured between the column portion 85 and the wall portion 955.

[0048] 10 shows a state in which the opposing surfaces 64R / L of each pair of chuck bars 61R / L, 62R / L, 63R / L move closer to each other in the Y direction as "main positioning stage (2)". When the opposing surfaces 64R / L move closer to each other in this manner, the bottom surfaces of the cutout grooves 65 come into contact with the pillar portions 85 to clamp the pillar portions 85.

[0049] The substrate assembly stage S3 will be described with reference to Fig. 11. In the substrate assembly stage, with the pillar portions 85 of the bus bars 81, 82, 83 being clamped by the secondary chuck 60, the primary chuck 50 is released and retreats from the area where it interferes with the substrate 70. That is, in Fig. 11, the primary chuck 50 moves outside the frame of the page.

[0050] In this state, the substrate 70 held by the substrate lifting device 40 is lowered from above the rear frame 95. The substrate connection portions 87 of the bus bars 81, 82, 83 are inserted into the insertion holes 71, 72, 73 of the substrate 70, and the lower surface of the substrate 70 abuts against the boss portion 957 of the rear frame 95. At this time, the substrate connection portions 87 of the bus bars 81, 82, 83, which have been finally positioned by the secondary chuck 60, are suitably inserted into the insertion holes 71, 72, 73. Thereafter, the substrate 70 is fastened to the boss portion 957 with a mounting screw, and the substrate connection portions 87 are electrically connected to the wiring pattern of the substrate 70 by soldering or the like.

[0051] The busbar positioning method according to this embodiment is summarized in the flowchart of Fig. 12. In temporary positioning step S1, primary chuck 50 collectively clamps substrate connection portions 87 of three busbars 81, 82, 83 from both sides in the X direction at a height corresponding to substrate connection portions 87, and temporarily positions busbars 81, 82, 83.

[0052] In the final positioning step S2, with the board connection portion 87 provisionally positioned by the primary chuck 50, the column portion 85 is clamped in the Y direction by the secondary chuck 60, and the bus bars 81, 82, 83 are finally positioned.

[0053] In the substrate assembly stage S3, with the pillar portion 85 clamped by the secondary chuck 60, the primary chuck 50 is released and moved away from the area where it interferes with the substrate 70, and then the substrate 70 is assembled so that the substrate connection portion 87 is inserted into the insertion holes 71, 72, and 73 of the substrate 70.

[0054] In this embodiment, temporary positioning by primary chuck 50 prevents significant positional deviation of bus bars 81, 82, 83, thereby ensuring a space between pillar portion 85 and motor wall portion 955 into which secondary chuck 60 can be inserted. Then, it becomes possible to assemble a substrate to substrate connection portion 87 while final positioning bus bars 81, 82, 83 by secondary chuck 60. Thus, in this embodiment, positioning of bus bars 81, 82, 83 is performed in two stages, thereby enabling substrate 70 to be properly assembled to substrate connection portion 87 at the tip of the pillar portion of each bus bar 81, 82, 83.

[0055] Further, the primary chuck 50 has a pair of shutter plates 55, 57 in which a plurality (three locations) of valleys 571-573, 581-583 are formed according to the number of the substrate connecting portions 87. This makes it possible to simply and effectively realize a provisional positioning configuration in which the substrate connecting portions 87 of the plurality (three) of bus bars 81, 82, 83 are collectively clamped.

[0056] Furthermore, the secondary chuck 60 has multiple sets (three sets) of chuck bars 61R / L, 62R / L, 63R / L that extend in the X direction sandwiching the corresponding bus bars 81, 82, 83 therebetween, move forward and backward in the X direction, and move in the Y direction so that the opposing surfaces 64R / L approach or move away from each other. This makes it possible to simply and effectively realize a main positioning configuration that individually clamps the column portions 85 of the bus bars 81, 82, 83.

[0057] (Other embodiments) (a) The present invention is not limited to the positioning of three bus bars in a three-phase motor, but may be applied to the positioning of two bus bars for the power supply wiring and the ground wiring of a DC motor, or may be applied to the positioning of multiple bus bars in a multi-phase motor having four or more phases.

[0058] (b) The overall shape of the busbar other than the post portion and the board connection portion is not limited to an L-shape, but may be a T-shape, a crank shape, etc. In particular, in a shape in which the post portion is bent from the base portion and erected, it is thought that there will be large variation in the position of the tip of the post portion due to factors such as squareness accuracy, and therefore the effects of the present invention will be effectively exhibited.

[0059] (c) The busbar being arranged adjacent to the wall of the rear frame is merely one example of a case where the effects of the present invention are effectively exerted, and the shape of the workpiece around the busbar is not an issue. As in the arrangement example of Fig. 2, the X-direction and Y-direction defined for the busbar do not need to correlate with the arrangement direction of connectors, etc., based on the central axis O of the motor. Furthermore, the present invention is not limited to electromechanical integrated motors, but can be applied to electrical equipment in general in which a busbar is used as a wiring conductor.

[0060] As described above, the present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit of the present invention. [Explanation of symbols]

[0061] 50 Primary chuck, 55, 56...Shutter plate, 571-573, 581-583...Valley, 60...Secondary chuck, 61R / L, 62R / L, 63R / L...Chuck bar, 70... Substrate, 71, 72, 73...through holes, 81, 82, 83... Busbars, 85...Column part, 87... Board connection part, 100···Integrated electromechanical motor (electrical equipment).

Claims

1. A device for positioning a plurality of bus bars (81, 82, 83) erected as wiring conductors for an electric device (100) such that positions of board connection portions (87) formed at tips of pillar portions (85) of the plurality of bus bars match positions of a plurality of corresponding insertion holes (71, 72, 73) in a board (70), The bus bars are arranged side by side in a thickness direction perpendicular to the width direction such that the width directions of the column portions are parallel to each other. If the width direction of the column portions is defined as an X direction and the thickness direction of the column portions is defined as a Y direction, a primary chuck (50) that collectively holds the board connection portions of the plurality of bus bars from both sides in the X direction at a height corresponding to the board connection portions, and temporarily positions the bus bars; a secondary chuck (60) that is provided individually for each of the bus bars at a height corresponding to the column portion, and that clamps the column portion in the Y direction while the board connection portion is clamped by the primary chuck, thereby finally positioning the bus bars; A bus bar positioning device comprising:

2. the primary chuck has a pair of shutter plates (55, 56) that are arranged at different heights and that open and close in an X direction across a straight line (Sy) in a Y direction that connects the board connection portions of the bus bars at normal positions; The busbar positioning device of claim 1, wherein a pair of the shutter plates have a plurality of valleys (571-573, 581-583) formed on the busbar side edges corresponding to the number of the board connection portions, and when the shutter plates approach each other, the board connection portions are sandwiched between the valleys.

3. the secondary chuck has a plurality of sets of chuck bars (61R / L, 62R / L, 63R / L) that extend in the X direction with the corresponding bus bar therebetween, move forward and backward in the X direction, and move in the Y direction so that opposing surfaces (64R / L) approach or move away from each other, For a set of the chuck bars corresponding to each of the bus bars, 3. The busbar positioning device according to claim 1 or 2, wherein a cutout groove (65) is formed in at least one of the opposing surfaces, and when the opposing surfaces approach each other, a bottom surface of the cutout groove abuts against the column portion to clamp the column portion.

4. A method for positioning a plurality of bus bars (81, 82, 83) erected as wiring conductors for an electric device (100) such that positions of board connection portions (87) formed at tips of pillar portions (85) of the plurality of bus bars match positions of a plurality of corresponding insertion holes (71, 72, 73) in a board (70), comprising: The bus bars are arranged side by side in a thickness direction perpendicular to the width direction such that the width directions of the column portions are parallel to each other. If the width direction of the column portions is defined as an X direction and the thickness direction of the column portions is defined as a Y direction, a temporary positioning step (S1) of temporarily positioning the bus bars by collectively clamping the board connection portions of the plurality of bus bars from both sides in the X direction using a primary chuck (50) provided at a height corresponding to the board connection portions; a final positioning step (S2) of clamping the column portions in the Y direction with secondary chucks (60) individually provided for each bus bar at a height corresponding to the column portions while the board connection portions are provisionally positioned by the primary chucks, thereby final positioning the bus bars; a substrate assembling step (S3) of releasing the primary chuck and retracting the primary chuck from an area where the primary chuck interferes with the substrate while the column portion is clamped by the secondary chuck, and then assembling the substrate such that the substrate connection portion is inserted into the insertion hole of the substrate; The busbar positioning method includes:

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