JP2005045903A - Concentrated distribution member for thin brush motor for vehicle, and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid waste in material acquisition with respect to a concentrated distribution member for thin brush motors for vehicles and a manufacturing method for the member. <P>SOLUTION: An annular member 11 is formed of a metal wire and comprises a plurality of arcuate members 12A and 12B in such a shape that a pair of bent pieces 14 are protruded from both ends of arcuate portions 13A and 13B having a constant curvature. A plurality of the arcuate members 12A and 12B constituting the annular member 11 are so disposed that their arcuate portions 13A and 13B are strung out in the circumferential direction to form a circle, and that the two adjacent bent pieces 14 are lined to constitute terminal portions 28. The annular member 11 is formed by bending a wire W. Therefore, materials are not wasted during material acquisition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concentrated power distribution member for a thin brush motor for a vehicle and a method for manufacturing the same.
[0002]
[Prior art]
In a thin brush motor for a vehicle in which a rotor is surrounded by a ring-shaped stator, the stator includes a plurality of magnetic poles made of windings and a concentrated power distribution member that forms an annular shape for supplying power to the magnetic poles. ing. One example of such a concentrated power distribution member is conventionally disclosed in Patent Document 1. This is a structure in which three ring-shaped bus bars are set on an annular insulating holder, and each bus bar has a plurality of tabs in a form protruding radially inward from one side edge portion in the circumferential direction. Are formed at equiangular intervals. A winding is connected to each tab.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-134724
[Problems to be solved by the invention]
The conventional concentrated power distribution member is formed by integrally forming a plurality of tabs on a side edge of a bus bar having an annular shape. When manufacturing the bus bar with tabs, as shown in FIG. 16, a plurality of tabs 102 protrude from the side edges of the bus bar 101 by punching out a flat strip metal material 100 having a certain width by pressing. The tabs 102 are bent radially inward with respect to the bus bar 101 and the bus bar 101 is bent into a circular shape.
[0005]
As described above, in the method of punching out the tab 102 protruding from the side edge of the bus bar 101 with the press, the region 103 along the side edge of the bus bar 101 is separated from the bus bar 101 in the metal material 100 having a constant width. Therefore, waste is generated in terms of material removal.
The present invention has been made in view of the above circumstances, and aims to suppress waste associated with material removal.
[0006]
[Means for Solving the Problems]
The invention of claim 1 is a concentrated power distribution member of a thin brush motor for a vehicle in which a plurality of annular members having a plurality of terminal portions connected to a winding of a stator are concentrically stacked. The annular member is made of a metal wire, and is formed of a plurality of arc-shaped members having a shape in which a pair of bent pieces protrudes from both ends of an arc portion having a constant curvature, and the plurality of members constituting the annular member The arc-shaped member has a configuration in which the arc portions are connected in the circumferential direction to form a circle, and two adjacent bent pieces are arranged side by side to form the terminal portion.
[0007]
The invention of claim 2 is a method of manufacturing a concentrated power distribution member of a thin brush motor for a vehicle in which a plurality of annular members having a plurality of terminal portions connected to a winding of a stator are concentrically stacked. And forming a circular arc member by forming a metal wire into an arc shape with a constant curvature and bending a both ends of the arc portion to form a pair of bent pieces. The annular member is configured by arranging the arc-shaped member so that the arc portions are connected in the circumferential direction to form a circle, and the two adjacent bent pieces are arranged to form the terminal portion. It has a feature.
[0008]
Operation and effect of the invention
[Invention of Claim 1]
Since the annular member can be formed simply by bending the wire, it is possible to suppress waste of the material when collecting the material.
[Invention of claim 2]
Since the annular member is formed by bending a wire, the material is not wasted when collecting the material.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
A first embodiment of the present invention will be described below with reference to FIGS. The thin brush motor for a vehicle in the present embodiment is a form in which a rotor is surrounded by a ring-shaped stator, and the stator is a concentrated power distribution member that forms a plurality of magnetic poles formed of windings and an annular shape for supplying power to the magnetic poles. 10. In addition, illustration and description are abbreviate | omitted about the detailed structure of a thin brush motor for vehicles and a stator.
[0010]
The concentrated power distribution member 10 is configured by concentrically stacking three annular members 11 each having a plurality of terminal portions 28 connected to the stator winding. The three annular members 11 have the same form. Each annular member 11 is made of a metal wire W, and is configured by eight arcuate members 12A and 12B having a shape in which a pair of bent pieces 14 protrude from both ends of arc portions 13A and 13B having a constant curvature. ing. In addition, the cross-sectional shape of the wire W can be made into arbitrary shapes, such as a perfect circle, an ellipse, an ellipse, a square, and a trapezoid.
[0011]
The eight arcuate members 12A and 12B are composed of seven first arcuate members 12A and one second arcuate member 12B. Each of the first and second arcuate members 12 </ b> A and 12 </ b> B has a length corresponding to an angle of 45 ° in the circumferential length of the annular member 11.
The bent piece 14 of the first arcuate member 12A protrudes linearly from both ends of the arcuate part 13A inward in the radial direction, that is, toward the center of the annular member 11, and the arcuate part 13A and two bends at both ends thereof are projected. The piece 14 does not distort in the axial direction of the annular member 11 and is in a form along a two-dimensional plane, that is, when placed on one flat surface, the arc portion 13A and the bent piece 14 do not float from the flat surface. It becomes the form which adheres over the full length.
[0012]
Here, a manufacturing method of the first arcuate member 12A will be described. The wire W waits in a state of being wound spirally while being long, and the wire W is sent to a predetermined forming position by the pair of feed rollers 20 and is interposed between the pair of forming rollers 21a and 21b. It is sandwiched (see FIG. 5). The rotational speed of one forming roller 21a (upper side in FIGS. 5 to 15) is set to be faster than the other forming roller 21b, and the wire W passes between the two forming rollers 21a and 21b having different rotational speeds. When passing, it is bent and formed into an arc shape toward the forming roller 21b having a low rotational speed.
[0013]
When the front end of the wire W (the leading end in the feeding direction and the right end in FIG. 5) passes through the forming rollers 21a and 21b by a predetermined length, the feeding roller 20 and the forming rollers 21a and 21b temporarily stop, The portion excluding the front end is sandwiched between the pair of front end clamping members 22 to be loosely regulated, and the front end of the wire W is held in a state of being fitted into the holding hole of the front end holder 23. The loose movement in the direction intersecting the length direction of the wire W is regulated (see FIG. 6). Next, the front end holder 23 tilts toward the molding roller 21b having a low rotation speed, whereby the front end portion of the wire W is bent by approximately 90 ° to form one (front side) bent piece 14 (FIG. 7). See).
[0014]
Thereafter, the front end holder 23 is detached from the front end portion (bending piece 14) of the wire W, and the front end clamping member 22 is separated from the wire W (see FIG. 8), so that the feed roller 20 feeds the wire W. Then, the molding process by the molding rollers 21a and 21b is resumed. Then, when the wire W is further bent and formed into an arc shape and is fed by a predetermined length, the feeding of the wire W by the feed roller 20 and the molding by the molding rollers 21a and 21b are temporarily stopped, and the wire W is fed by the feed roller. 20 and the forming rollers 21a and 21b are cut by a cutter 24.
[0015]
Thereafter, the cut wire W is slightly fed while being formed by the forming rollers 21a and 21b and temporarily stops (see FIG. 9). Next, the position of the rear end side portion of the wire W that is slightly ahead of the rear end and in front of the forming rollers 21a and 21b is sandwiched between the pair of rear end sandwiching members 26 and loosely moved. In addition to being regulated, the rear end of the wire W is held in a state of being fitted in the holding hole of the holder 27 for the rear end, thereby restricting the loose movement in the direction intersecting the length direction of the wire W (FIG. 10). Next, the rear end holder 27 is tilted toward the molding roller 21b having a low rotation speed, whereby the rear end portion of the wire W is bent by approximately 90 ° to form another (rear) bent piece 14. (See FIG. 11).
[0016]
Thereafter, the rear end holder 27 is detached from the rear end portion (bending piece 14) of the wire W, and the rear end clamping member 26 is separated from the wire W (see FIG. 12), and is formed by the forming rollers 21a and 21b. When the feeding process and the molding process are resumed and the base ends of the rear bent pieces 14 of the wire W reach the molding rollers 21a and 21b, the molding rollers 21a and 21b are temporarily stopped. Thus, the arcuate member 12A is completed (see FIG. 13). Thereafter, the forming rollers 21a and 21b move so as to be spaced apart from each other, whereby the arcuate member 12A is released from the forming rollers 21a and 21b (see FIG. 14), and a predetermined storage box (not shown) ).
[0017]
Thereafter, the forming rollers 21a and 21b and the front end holder 23 are moved back to their original positions (see FIG. 15), and the feed roller 20 feeds the wire W to the forming rollers 21a and 21b. Is repeated. The step of bending the rear bending piece 14 may be performed after the wire W has completely passed through the forming rollers 21a and 21b.
The second arcuate member 12B is composed of two symmetrical divided pieces 15 divided at the center position in the circumferential direction. That is, the arc portion 13B is formed by connecting two arc pieces 16 in the circumferential direction and concentrically, and the connecting portion of the arc pieces 16 extends radially outward from the arc piece 16, and further L-shaped extending pieces 17 extending in the axial direction from the extending end are formed so as to be adjacent to each other in the circumferential direction, and the external terminal fitting 18 is wound around the two adjacent L-shaped extending pieces 17. In this way, it is fixed by welding. The external terminal fitting 18 has a connection plate protruding outward in the radial direction, and a battery (not shown) is connected to the connection plate.
[0018]
Further, at the end of each arc piece 16 opposite to the L-shaped extending piece 17, the bent piece 14 is radially inward, that is, the center of the annular member 11, similarly to the first arc-shaped member 12 </ b> A. It protrudes linearly toward. And the circular arc part 13B comprised by the two circular arc pieces 16 and the two bending pieces 14 of the both ends are the form along a two-dimensional plane, ie, one flat, without distorting to the axial direction of the annular member 11. When placed on the surface, the arcuate portion 13B and the bent piece 14 are in close contact with each other without being lifted from the flat surface.
[0019]
In the eight arcuate members 12A and 12B, the arcuate portions 13A and 13B are concentrically connected in series in the circumferential direction to form one perfect circle, and two adjacent bent pieces 14 are circumferentially connected to each other. Are arranged side by side (adjacent). Here, the eight arcuate members 12A and 12B are arranged along a common two-dimensional plane, that is, when placed on one flat surface, the eight arcuate members 12A and 12B are not lifted from the flat surface. All are in close contact. The adjacent bent pieces 14 are connected (integrated) together with the connecting pieces 19 by welding in a state surrounded by the connecting pieces 19 obtained by bending the plate material into an oval shape, and integrated adjacent to each other. The two bent pieces 14 constitute one terminal portion 28. As described above, one annular member 11 having one external terminal fitting 18 and eight terminal portions 28 is manufactured.
[0020]
The three annular members 11 are overlapped in the axial direction in a state where the external terminal fittings 18 are shifted from each other by 15 ° in the circumferential direction and are concentrically arranged. The portions 13 </ b> A and 13 </ b> B are joined by a binding member 29 in each region between the adjacent terminal portions 28. As a result, the three annular members 11 are integrated in such a manner that the terminal portions 28 are shifted in phase in the circumferential direction by an angle of 15 °, and thus the concentrated power distribution member 10 is configured. In addition, the winding of a stator is connected to each terminal part 28 or the coupling piece 19, respectively.
[0021]
As described above, in the concentrated power distribution member 10 of the present embodiment, the annular member 11 is formed by bending the wire W. Therefore, the material is not wasted when taking the material.
[Other Embodiments]
The present invention is not limited to the embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
[0022]
(1) In the above embodiment, the bent piece is bent (protruded) inward in the radial direction. However, according to the present invention, the protruding direction of the bent piece may be radially outward or axial. .
(2) In the above embodiment, one annular member is configured by eight arc-shaped members. However, according to the present invention, the number of arc-shaped members constituting the annular member may be seven or less, and nine or more. But you can.
(3) In the above embodiment, the bent portions are bound together to form the terminal portion in advance, and the terminal portion and the winding are connected, but according to the present invention, the binding member connected to the winding The bent pieces may be bound together. In this way, the process of binding the bent pieces and the process of connecting the windings to the terminal portions are made common, so the number of work steps is reduced.
[Brief description of the drawings]
1 is a front view of an annular member according to Embodiment 1. FIG. 2 is a partially cutaway side view of the annular member. FIG. 3 is a front view of a concentrated power distribution member. Schematic diagram showing the manufacturing process of the arcuate member [Fig. 6] Schematic diagram showing the manufacturing process of the arcuate member [Fig.7] Schematic diagram showing the manufacturing process of the arcuate member [Fig.8] The manufacturing process of the arcuate member Schematic diagram showing the manufacturing process of the arc-shaped member [FIG. 10] Schematic diagram showing the manufacturing process of the arc-shaped member [FIG. 11] Schematic diagram showing the manufacturing process of the arc-shaped member [FIG. Schematic diagram showing the manufacturing process of the arc-shaped member [FIG. 13] Schematic diagram showing the manufacturing process of the arc-shaped member [FIG. 14] Schematic diagram showing the manufacturing process of the arc-shaped member [FIG. 15] Schematic showing the manufacturing process of the arc-shaped member FIG. 16 is a schematic diagram showing a manufacturing process of a conventional example. Description of the code]
DESCRIPTION OF SYMBOLS 10 ... Concentrated power distribution member 11 ... Ring-shaped member 12A, 12B ... Arc-shaped member 13A, 13B ... Arc part 14 ... Bending piece 28 ... Terminal part

Claims (2)

A concentrated power distribution member for a thin brush motor for a vehicle in which a plurality of annular members having a plurality of terminal portions connected to a winding of a stator are concentrically stacked,
The annular member is made of a metal wire, and is composed of a plurality of arc-shaped members having a shape in which a pair of bent pieces protrudes from both ends of an arc portion having a constant curvature,
The plurality of arc-shaped members constituting the annular member are configured such that the arc portions are connected in the circumferential direction to form a circle, and the adjacent two bent pieces are arranged to form the terminal portion. A concentrated power distribution member for a thin brush motor for a vehicle, characterized in that it is disposed. A method of manufacturing a concentrated power distribution member of a thin brush motor for a vehicle, in which a plurality of annular members having a plurality of terminal portions connected to a winding of a stator are concentrically stacked,
While forming a metal wire in an arc shape with a constant curvature, by bending both ends of the arc portion to form a pair of bent pieces, an arc member is formed,
The circular arc members are arranged such that the circular arc portions are connected in the circumferential direction to form a circle, and the two adjacent bent pieces are arranged side by side to form the terminal portion. The manufacturing method of the concentrated power distribution member of the thin brush motor for vehicles characterized by comprising an annular member.

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