JP2006166680A - Stator structure of rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator structure of a rotary electric machine, which can prevent a terminal stand from being peeled from mold resin and from being pulled out, when a bolt connecting an outer bus bar is screwed to a terminal stand, and when a bolt hole is formed in the terminal stand. <P>SOLUTION: The stator structure of the rotary electric machine comprises a stator 4, where a plurality of stator cores 41 on which coils 42 have been wound are arranged in a circumference direction and a plurality of circular inner bus bars 102 for supplying compound current to the coils 42, where the cylindrical terminal stand 100 is arranged via an arm 101, are disposed electrically connecting them to the coils 42 and the terminal stand 100 is fixed by a resin mold 200, an outer rotor 6 disposed on an outer peripheral side of the stator 4 and an inner rotor 2 disposed to the inner peripheral side of the stator 4. A unevenness part 100b is installed on a side 100a of the cylindrical terminal stand 100. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stator structure for a rotating electrical machine.

  As a rotating electrical machine, for example, there is a type as described in Patent Document 1, and as shown in FIG. 7, a plurality of stator cores 40 around which coils 42 are wound are arranged at equal intervals in the circumferential direction. In order to supply a composite current to the coil 42, an inner bus bar 23 made of a plurality of annular conductors in which a cylindrical terminal block 21 is provided via an arm 22 made of a conductor is electrically connected to the coil 42. The terminal block 21 is insulated and fixed by the mold resin 200 to constitute the stator 4, the outer rotor 6 is disposed on the outer peripheral side of the stator, and the inner rotor 2 is disposed on the inner peripheral side of the stator. Yes.

Further, the cylindrical terminal block 21 is provided with a bolt hole, and the outer bus bar 24 electrically connected to an inverter (not shown) is connected to the bolt 11, and the bolt 11 is screwed into the bolt hole of the terminal block 21. By doing so, the outer bus bar 24 and the terminal block 21 are electrically connected, and a composite current generated by an inverter (not shown) is supplied to the coil 42 constituting the stator 4.
JP 2003-299273 A

  However, in the stator structure of the rotating electric machine having the above-described form, the terminal block 21 is fixed by the mold resin 200. Therefore, when the bolt 11 is screwed into the bolt hole of the terminal block 21, the terminal block 21 is not illustrated. 7, when the force in the pulling direction from left to right is applied, the terminal block 21 is peeled off from the mold resin 200 containing and fixing the cylindrical terminal block 21, and the terminal block 21 is pulled out. There was a fear. In addition, when a bolt hole is formed in the terminal block 21 after the terminal block 21 and the inner bus bar 23 are provided, the force in the pulling direction from left to right in FIG. As a result, the terminal block 21 may be similarly peeled off from the mold resin 200 and pulled out.

  The object of the present invention is to solve the above-described problems. The purpose of the present invention is to screw a bolt for connecting an outer bus bar to a terminal block and to form a bolt hole in the terminal block. Is to provide a stator structure of a rotating electrical machine that can prevent the terminal block from being peeled off from the mold resin.

A stator structure for a rotating electrical machine according to claim 1 is a circular structure in which a rotatable rotor and a plurality of stator cores each having a coil wound around the rotor are arranged in the circumferential direction and current is supplied to the coil. A rotary electric machine comprising a stator in which a plurality of annular inner bus bars each having a columnar terminal block provided via an arm are electrically connected to the coil, and the terminal block is fixed by a resin mold. In the stator structure,
An uneven portion is provided on a side surface of the cylindrical terminal block.

The stator structure of the rotating electrical machine according to claim 2 is a circular structure in which a rotatable rotor and a plurality of stator cores each having a coil wound around the rotor are arranged in the circumferential direction and current is supplied to the coil. A rotary electric machine comprising a stator in which a plurality of annular inner bus bars each having a columnar terminal block provided via an arm are electrically connected to the coil, and the terminal block is fixed by a resin mold. In the stator structure,
A shape of a joint portion of the arm with the terminal block is a circular shape larger than an end surface of the terminal block.

  According to the stator structure of the rotating electrical machine according to claim 1, since the uneven portion is provided on the side surface of the cylindrical terminal block, the mold resin enters the concave portion if it is a concave portion, and the mold resin if the convex portion. The terminal block is provided with bolts for connecting the outer bus bar to the terminal block so that the convex resin wraps around and the mold resin firmly restrains the terminal block in the pulling direction, that is, the central axis direction of the cylindrical terminal block. When screwing into a bolt hole or forming a bolt hole in a terminal block, even if a force in the direction in which the terminal block is pulled out from the mold resin is applied, the terminal block will be peeled off from the mold resin and pulled out. Can be prevented.

  According to the stator structure of the rotating electrical machine according to claim 2, since the shape of the joint portion of the arm with the terminal block is a circular shape larger than the end surface of the cylindrical terminal block, the joint portion is a convex portion. The mold resin wraps around the convex part, and the mold resin firmly restrains the terminal block in the drawing direction, that is, the central axis direction of the cylindrical terminal block, so that the outer bus bar is connected to the terminal block. When the bolt is screwed into the bolt hole provided in the terminal block or the bolt hole is formed in the terminal block, even if a force in the direction in which the terminal block is pulled out from the mold resin is applied, the terminal block is peeled off from the mold resin, It can prevent being pulled out.

  Furthermore, compared with the stator structure of the rotating electrical machine according to claim 1, since the joint portion of the arm forming the convex portion is located on the opposite side of the pulling direction from the terminal block, it is positioned in the pulling direction from the convex portion. The length of the mold resin in the direction is increased as much as possible, and when a force in the pulling direction is applied to the terminal block, the rigidity of the mold resin where the shear stress due to the force acts is increased, and the mold resin is The force which restrains a base can be made stronger.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view including a central axis showing an embodiment of a rotating electrical machine according to the present invention.
As shown in FIG. 1, this multi-axis multilayer type rotating electrical machine has a plurality of stator cores 41 around which coils 42 are wound, arranged at equal intervals in the circumferential direction, and a circular current for supplying a composite current to the coils 42. An inner bus bar 102 made of a plurality of annular conductors provided with a columnar terminal block 100 via an arm 101 made of a conductor is electrically connected to the coil 42, and the terminal block 100 is molded resin around it. The stator 4 is filled with 200 and fixed by a resin mold, and the front side of the stator 4 is fixed to the motor housing 3 via the front side stator fixing case 8. The rotor 6 is disposed, and the inner rotor 2 is disposed on the inner peripheral side of the stator 4.

Furthermore, the cylindrical terminal block 100 is provided with a bolt hole, the outer bus bar 24 electrically connected to an inverter (not shown) is connected to the bolt 11, and the bolt 11 is screwed into the bolt hole of the terminal block 100. By doing so, the outer bus bar 24 and the terminal block 100 are electrically connected, and a composite current generated by an inverter (not shown) is supplied to the coil 42 constituting the stator 4.
FIG. 2 is an enlarged schematic cross-sectional view showing the vicinity of the terminal block 100 of the rotating electrical machine shown in FIG.
Here, as shown in FIG. 2, in the stator structure of the rotating electrical machine described above, the side surface 100a of the columnar terminal block 100 is provided with a concavo-convex portion, here, a groove portion 100b formed in an annular shape extending in the circumferential direction. . (Equivalent to claim 1)

Here, as shown in FIG. 1, the inner rotor 2 is formed in a hollow cylindrical shape, and the inner peripheral surface thereof is the rear side of the inner rotor hollow shaft 1 (the side from which the driving force of the rotating electrical machine is taken out, that is, the side opposite to the front side) ), And is joined to the large-diameter portion 1a by press-fitting.
The outer rotor 6 is also formed in a hollow cylindrical shape, and the outer peripheral surface thereof is joined to the inner peripheral surface of the cylindrical outer rotor fixing case 13 by press-fitting and is connected to the rear side of the outer rotor fixing case 13. The disc-shaped rear side connecting case 14 is joined, and the inner peripheral surface of the connecting case 14 is joined to the rear side of the solid outer rotor shaft 5 by press fitting. Further, a disk-shaped front side connection case 15 is joined to the front side of the outer rotor case 13.
Further, a rear side stator fixing case 16 is joined to the rear side of the stator 4.

  In FIG. 1, reference numeral 80 denotes a front-side outer rotor bearing for rotatably supporting the outer rotor 6 by the motor housing 3, and 81 for rotatably supporting the outer rotor 6 by the motor housing 3. This is the rear side outer rotor bearing. Further, 82 is a front inner rotor bearing for rotatably supporting the inner rotor 2 by the front stator fixing case 8, and 83 is rotatably supporting the outer rotor 6 by the rear stator fixing case 16, Reference numeral 84 denotes a stator bearing for supporting the stator 4 itself, and 84 denotes a rear-side inner member for rotatably supporting the inner rotor 2 by the outer rotor 6 and allowing a difference in rotational speed between the outer rotor 6 and the inner rotor 2. It is a rotor bearing.

  Reference numeral 85 denotes an inner rotor resolver that detects the rotational position of the inner rotor 2, and reference numeral 86 denotes an outer rotor resolver that detects the rotational position of the outer rotor 6. The resolver may be replaced with an encoder.

FIG. 3 is a perspective view schematically showing only the terminal block 100, the arm 101, and the inner bus bar 102 of the rotating electrical machine shown in FIGS.
An arm 101 made of a conductor extending radially inward of the inner bus bar 102 is connected to one end of an inner bus bar 102 made of a conductor formed in an annular shape with an opening at one location on the circumference. A circular joining portion 101a is formed on the end portion, and the end surface in the central axis direction of the cylindrical terminal block 100 is joined to the joining portion 101a.
Further, a groove portion 100 b extending in the circumferential direction is formed on the side surface 100 a of the terminal block 100.

FIG. 4 is a schematic cross-sectional view showing the terminal block 100 and the arm 101 shown in FIG. 3 including the central axis of the terminal block 100.
A circular joining portion 101a is formed at the radially inner end of the arm 101 made of a conductor extending radially inward of the inner bus bar 102, and the end surface in the central axis direction of the cylindrical terminal block 100 is joined to the joining portion 101a. ing.
Further, a groove portion 100 b extending in the circumferential direction is formed on the side surface 100 a of the terminal block 100.

  According to the said structure, since the protruding item | line part 100b is provided in the side surface 100a of the column-shaped terminal block 100, the mold resin 200 penetrates into the said groove part 100b, and the mold resin 200 pulls out the terminal block 100, ie, the drawing direction. In order to firmly restrain the cylindrical terminal block 100 in the central axis direction, the bolt 11 for electrically connecting the outer bus bar 24 to the terminal block 100 is screwed into a bolt hole provided in the terminal block 100 or the terminal block. In forming the bolt hole, even if a force in the direction in which the terminal block 100 is pulled out from the mold resin 200 is applied, it is possible to prevent the terminal block 100 from being separated from the mold resin 200 and pulled out.

FIG. 5 is a schematic cross-sectional view showing only the terminal block and the arm of the stator structure of the rotating electrical machine according to another embodiment of the present invention, including the central axis of the terminal block.
Here, a circular joint portion 101a is formed at the radially inner end of the arm 101 made of a conductor extending radially inward of the inner bus bar 102, and the end surface in the central axis direction of the cylindrical terminal block 100 is formed at the joint portion 101a. Are joined.
Further, a protruding strip portion 100 c extending in the circumferential direction is formed on the side surface 100 a of the terminal block 100. (Equivalent to claim 1)

  This also prevents the terminal block from coming off from the mold resin when the bolt is attached to the terminal block and when the bolt hole is provided, like the stator structure of the embodiment shown in FIGS.

FIG. 6 is a schematic cross-sectional view showing only a terminal block and an arm of a stator structure of a rotating electrical machine according to another embodiment of the present invention, including the central axis of the terminal block.
A circular joining portion 101a is formed at the radially inner end of the arm 101 made of a conductor extending radially inward of the inner bus bar 102, and the end surface in the central axis direction of the cylindrical terminal block 100 is joined to the joining portion 101a. ing.
In addition, the shape of the joint portion 101a of the arm 101 with the terminal block 100 is a circular shape larger than the end surface of the terminal block 100 in the central axis direction. (Equivalent to claim 2)

  According to the configuration corresponding to the second aspect, since the shape of the joint portion 101a of the arm 101 with the terminal block 100 is a circular shape larger than the end surface of the columnar terminal block 100, the joint portion 10a is the terminal block 100. The protrusion protrudes to the outer peripheral side, and the protrusion is encased in a mold resin (not shown), and the mold resin wraps the terminal block 100 in the drawing direction, that is, in the central axis direction of the cylindrical terminal block 100. In order to firmly constrain, the terminal block 100 is molded when a bolt for connecting an outer bus bar (not shown) to the terminal block 100 is screwed into a bolt hole provided in the terminal block or a bolt hole is formed in the terminal block. Even if a force in the direction of being pulled out from the resin is applied, it is possible to prevent the terminal block 100 from being separated from the mold resin and being pulled out.

  The multi-axis multi-layer rotating electric machine shown in FIG. 1 has a coil 42 of a stator 4 connected in multiple phases, and the coil 42 is connected to a current for controlling the rotation of the inner rotor 2 and to control the rotation of the outer rotor 6. A composite current combined with the current is supplied via the outer bus bar 24, the bolt 11, the terminal block 100, the arm 101, and the inner bus bar 102, and the magnetic flux is changed to change the magnetic flux, whereby the inner rotor 2 and the outer rotor 6 are changed. Can be independently controlled.

  In addition, this invention is not limited only to the said embodiment, Many deformation | transformation or a change is possible. The motor may be a single rotor, or may be an axial gap type motor in which the stator and the rotor are arranged in the axial direction.

  The present invention is suitable for use in a stator structure of a rotating electrical machine.

1 is a schematic cross-sectional view showing an embodiment of a stator structure of a rotating electrical machine according to the present invention. It is a schematic cross section which expands and shows one Embodiment of the stator structure of the rotary electric machine which concerns on this invention. 1 is a schematic perspective view showing an enlarged part of an embodiment of a stator structure of a rotating electrical machine according to the present invention. It is a schematic cross section which expands and shows one Embodiment of the stator structure of the rotary electric machine which concerns on this invention. It is a schematic cross section which expands and shows other embodiment of the stator structure of the rotary electric machine which concerns on this invention partially. It is a schematic cross section which expands and shows further another embodiment of the stator structure of the rotary electric machine which concerns on this invention. It is a schematic cross section which shows the stator structure of the conventional rotary electric machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner rotor hollow shaft 1a Large diameter part 2 Inner rotor 3 Motor housing 4 Stator 5 Outer rotor shaft 6 Outer rotor 8 Front side stator fixing case 11 Bolt 13 Outer rotor fixing case 14 Rear side connection case 15 Front side connection case 16 Rear side Stator fixing case 21 Terminal block 22 Arm 23 Inner bus bar 24 Outer bus bar 41 Stator core 42 Coil 80 Front outer rotor bearing 81 Rear outer rotor bearing 82 Front inner rotor bearing 83 Stator bearing 84 Rear inner rotor bearing 85 Inner rotor resolver 86 Outer rotor resolver 100 Terminal block 100a Side surface 100b Groove portion 100c Projection strip portion 101 Arm 101a Joining portion 102 Inner bus bar 200 Mold The fat

Claims (2)

A circle in which a rotatable rotor and a plurality of stator cores wound with coils facing the rotor are arranged in the circumferential direction, and a cylindrical terminal block for supplying current to the coils is provided via an arm. In a stator structure of a rotating electrical machine comprising a plurality of annular inner bus bars electrically connected to the coil, and a stator formed by fixing the terminal block with a resin mold,
A stator structure for a rotating electrical machine, wherein uneven portions are provided on side surfaces of the cylindrical terminal block. A circle in which a rotatable rotor and a plurality of stator cores wound with coils facing the rotor are arranged in the circumferential direction, and a cylindrical terminal block for supplying current to the coils is provided via an arm. In a stator structure of a rotating electrical machine comprising a plurality of annular inner bus bars electrically connected to the coil, and a stator formed by fixing the terminal block with a resin mold,
A stator structure of a rotating electrical machine in which a shape of a joint portion of the arm with the terminal block is a circular shape larger than an end surface of the terminal block.

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