JP2005151660A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor that enables the installation space therefor to be smaller. <P>SOLUTION: The motor 100 comprises a rotor 10, a stator 20, a power line 30, a case 40, a terminal block 50, a terminal member 60, and a screw 70. The rotor 10 is disposed inside the stator 20. The case 40 houses the rotor 10 and the stator 20. The power line 30 is taken out from the coil end 22A of a stator coil 22 in the direction DR1 of the rotating shaft of the rotor 10. The terminal block 50 is disposed inside the outer circumferential surface 40B of the case 40, and fixed at one end 40A of the case 40. The terminal member 60 is bent from the direction DR1 of the rotating shaft toward the radial direction DR1 substantially in L shape. One end of the terminal member 60 is connected with the power line 30, and the other end is fixed on the terminal block 50 with the screw 70 inserted into a long hole extending in the radial direction DR2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric motor, and more particularly, to an electric motor capable of reducing the arrangement space.

  In an electric motor including a stator and a rotor, a power cable is connected to a stator coil wound around a stator core, and an electric current is passed through the stator coil. When the power cable is connected to the stator coil, the terminal of the lead wire drawn out from the coil end of the stator coil is connected to the terminal of the power cable.

An electric motor is connected to a power cable that is drawn out in the radial direction of the rotor from the coil end of the stator coil at one end of the electric motor and inserted into the case along the radial direction from the outer peripheral surface side of the stator. Known (Patent Document 1). In this electric motor, the lead wire is connected to a terminal having a connecting portion having a linear cross section. Then, the lead wire is connected to the power cable by connecting the connecting portion of the terminal to the terminal of the power cable with a screw.
Japanese Patent Laid-Open No. 11-98755 JP-A-9-69327 JP-A-11-167833

  However, as with conventional motors, the lead wires drawn in the radial direction of the rotor can move in the radial direction of the rotor and the rotational axis of the rotor, so the lead wire and the power cable are connected using a terminal block. In this case, the terminal block becomes larger in the radial direction so that the power cable can be connected even if the lead wire moves. As a result, there is a problem that the arrangement space of the electric motor becomes large.

  Accordingly, in order to produce a motor that is reduced in size in the radial direction, it is conceivable to draw out the lead wire in the direction of the rotation axis of the rotor.

  However, when the lead wire is pulled out in the direction of the rotation axis of the rotor, the lead wire cannot move in the direction of the rotation axis, so that it can be connected to the power cable even if the position of the end of the lead wire changes in the direction of the rotation axis. For this purpose, the terminal block needs to be movable in the direction of the rotation axis. As a result, there is a problem that the arrangement space of the electric motor increases in the direction of the rotation axis.

  Therefore, the present invention has been made to solve such a problem, and an object of the present invention is to provide an electric motor capable of reducing the arrangement space.

  According to this invention, the electric motor includes a stator, a rotor, a power line, a terminal block, and a terminal member. The rotor is rotatably provided with respect to the stator. The power line is taken out from the coil end of the stator coil of the stator in the direction of the rotation axis of the rotor. The terminal member has a substantially U-shape bent from the rotation axis direction of the rotor to the radial direction of the rotor, and connects the power line to the terminal block. The terminal member includes a power line connecting portion that is disposed in the rotation axis direction of the rotor and connected to the power line, and a terminal block fixing portion that is disposed in the radial direction of the rotor and is fixed to the terminal block.

  Preferably, the electric motor further includes a case provided on the outer peripheral side of the stator. And a terminal block is arrange | positioned rather than the outer peripheral surface of a case at the inner peripheral side.

  Preferably, the terminal block fixing portion has a long hole extending in the radial direction of the rotor, and is fixed to one main surface of the terminal block by a screw member inserted into the long hole.

  Preferably, the terminal block fixing portion has a second length in the radial direction of the rotor that can be changed according to the first length from the end surface in the rotation axis direction of the stator core of the stator to the end of the power line.

  Preferably, the second length is relatively long when the first length is relatively long, and is relatively short when the first length is relatively short.

  Preferably, the power line connecting portion has a second length in the rotation axis direction of the rotor that can be changed in accordance with a first length from the end surface in the rotation axis direction of the stator core of the stator to the end of the power line. The terminal block fixing portion has a third length in the radial direction of the rotor that can be changed according to the first length.

  Preferably, the second length is relatively short when the first length is relatively long, and is relatively long when the first length is relatively short. The third length is relatively long when the first length is relatively long, and is relatively short when the first length is relatively short.

  Preferably, the first length is a length after impregnating the varnish of the coil end.

  The electric motor according to the present invention has a power line drawn from the coil end of the stator coil in the direction of the rotation axis of the rotor, and is bent into a substantially square shape in the radial direction from the rotation axis direction of the rotor, and the power line is connected to the terminal block. And the terminal member fixes the power line to the terminal block by the power line connecting portion disposed in the rotation axis direction of the rotor and the terminal block fixing portion disposed in the radial direction of the rotor. In an electric motor that takes out the wire in the direction of the rotation axis of the rotor, the size in the direction of the rotation axis is reduced.

  Therefore, according to this invention, the arrangement space of the electric motor in the rotating shaft direction of the rotor can be reduced.

  The electric motor according to the present invention further includes a case provided on the outer peripheral side of the stator, and the terminal block is disposed on the inner peripheral side with respect to the outer peripheral surface of the case, so that the terminal block protrudes from the outer peripheral surface of the case. Absent. As a result, the size of the electric motor in the rotation axis direction and the radial direction of the rotor is reduced.

  Therefore, according to this invention, the arrangement space of the electric motor in the rotating shaft direction and radial direction of the rotor can be reduced.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is a schematic sectional view of an electric motor according to an embodiment of the present invention. With reference to FIG. 1, the electric motor 100 includes a rotor 10, a stator 20, a case 40, a terminal block 50, a terminal member 60, and a screw 70.

  The rotor 10 is provided on the inner peripheral side of the stator 20 so as to be rotatable with respect to the stator 20. The rotor 10 includes a rotor shaft 11, a rotor core 12, and a magnet 13. The rotor core 12 is fixed around the rotor shaft 11. The magnet 13 is disposed on the outer periphery of the rotor core 12.

  The stator 20 includes a stator core 21 and a stator coil 22. The stator core 21 is disposed outside the rotor core 12 so as to face the rotor core 12. The stator core 21 is fixed to the case 40. The stator coil 22 is wound around the stator core 21. Stator coil 22 includes a U-phase coil, a V-phase coil, and a W-phase coil.

  A stator coil 22 composed of a U-phase coil, a V-phase coil, and a W-phase coil is compression-molded so as to approach the end surface 21A or 21B of the stator core 21 after being wound around the stator core 21. Thereafter, the coil ends 22A and 22B of the stator coil 22 are fixed in shape by varnish impregnation.

  The power line 30 is taken out in the rotation axis direction DR1 of the rotor 10 from the coil end 22A. The case 40 houses the rotor 10 and the stator 20. The terminal block 50 is disposed so as not to protrude from the outer peripheral surface 40B of the case 40 along the radial direction DR2 of the rotor 10, and is fixed to one end 40A of the case 40.

  The terminal member 60 has a substantially U-shape bent from the rotation axis direction DR1 of the rotor 10 to the radial direction DR2. The terminal member 60 has one end connected to the power line 30 and the other end fixed to the terminal block 50 with a screw 70. That is, the terminal member 60 connects the power line 30 to the terminal block 50. The terminal member 60 is connected to a power cable (not shown) on the terminal block 50. Thereby, a current is supplied to the stator coil 22.

  FIG. 2 is a plan view of the stator 20 as viewed from the direction A shown in FIG. Referring to FIG. 2, coils 510 to 517 constitute a U-phase coil of stator coil 22, coils 520 to 527 constitute a V-phase coil of stator coil 22, and coils 530 to 537 represent stator coil 22. The W-phase coil is configured. Each of coils 510-517, 520-527, 530-537 has a substantially arc shape.

  Coils 510 to 517 are arranged on the outermost periphery. The coils 520 to 527 are arranged inside the coils 510 to 517 at positions shifted by a certain distance in the circumferential direction with respect to the coils 510 to 517, respectively. The coils 530 to 537 are arranged inside the coils 520 to 527 at positions shifted from the coils 520 to 527 by a certain distance in the circumferential direction.

  Each of coils 510-517, 520-527, 530-537 is wound in series around each of a plurality of corresponding teeth. For example, the coil 510 corresponds to the teeth 1 to 5 and is formed by being wound around the entire teeth 1 to 5 a predetermined number of times from the outer periphery.

  The coils 511 to 517, 520 to 527, and 530 to 537 are also formed on the corresponding teeth in the same manner as the coil 510.

  Coils 510 to 513 are connected in series, and one end is terminal U1 and the other end is neutral point UN1. Coils 514 to 517 are connected in series, and one end is terminal U2 and the other end is neutral point UN2.

  Coils 520 to 523 are connected in series, and one end is terminal V1 and the other end is neutral point VN1. Coils 524 to 527 are connected in series, and one end is terminal V2 and the other end is neutral point VN2.

  Coils 530 to 533 are connected in series, and one end is terminal W1 and the other end is neutral point WN1. Coils 534 to 537 are connected in series, and one end is terminal W2 and the other end is neutral point WN2.

  3 is a perspective view and a plan view of the terminal member 60 shown in FIG. With reference to FIG. 3, the terminal member 60 includes a power line connecting portion 61 and a terminal block fixing portion 62. The power line connecting portion 61 is disposed in the rotation axis direction DR1 of the rotor 10. Then, the power line connecting portion 61 is connected to the power line 30 by caulking one end of the power line 30 with the caulking portion 610.

  The terminal block fixing portion 62 is disposed in the radial direction DR2 of the rotor 10. The terminal block fixing portion 62 has a long hole 620 extending in the radial direction DR2 of the rotor 10. The long hole 620 is a hole for fixing the terminal block fixing part 62 to the terminal block 50 with the screw 70.

  The terminal member 60 is produced by bending a linear terminal member 80 arranged in the rotation axis direction DR1 of the rotor 10 from the rotation axis direction DR1 to the radial direction DR2 along the line LN1.

  4 is a perspective view of the terminal block 50, the terminal member 60, and the screw 70 shown in FIG. 1 viewed from the rotor shaft 11 side. Referring to FIG. 4, in response to stator coil 22 comprising a U-phase coil, a V-phase coil, and a W-phase coil, power line 30 is composed of power lines 30 </ b> A, 30 </ b> B, and 30 </ b> C, and terminal member 60 is Terminal members 60A, 60B, and 60C are included, and the screw 70 is formed of screws 70A, 70B, and 70C.

  The terminal members 60A, 60B, 60C connect the power lines 30A, 30B, 30C to the terminal block 50, respectively. Power lines 30A, 30B, and 30C are taken out from the U-phase coil, V-phase coil, and W-phase coil of stator coil 22, respectively. Each of the terminal members 60 </ b> A, 60 </ b> B, 60 </ b> C has the same structure as the terminal member 60. Terminal members 60A, 60B, and 60C have one ends connected to power lines 30A, 30B, and 30C, respectively, and the other ends fixed to one main surface 50A of terminal block 50 by screws 70A, 70B, and 70C, respectively.

  Thus, power lines 30A, 30B, 30C taken out from the U-phase coil, V-phase coil, and W-phase coil are connected to terminal block 50 by terminal members 60A, 60B, 60C, respectively.

  FIG. 5 is an enlarged view of the stator core 21, the coil end 22A, the power line 30 and the terminal member 60 shown in FIG. Referring to FIG. 5, one main surface 50 </ b> A of terminal block 50 exists at position PS <b> 0 at a distance L <b> 1 from end surface 21 </ b> A of stator core 21. The distance L1 is a distance after the varnish impregnation of the coil ends 22A and 22B. The linear terminal member 80 is attached to the power line 30 taken out in the rotation axis direction DR1 after the stator coil 22 is wound around the stator core 21 and compression-molded. Thereafter, the coil end 22A is impregnated with varnish.

  Then, depending on the shape of the coil end 22A after impregnation with the varnish, the distance from the end surface 21A of the stator core 21 to the end of the power line 30 changes to distances L2, L3 (<L2), L4 (<L3).

  When the distance from the end surface 21A of the stator core 21 to the end of the power line 30 is the distance L2, the terminal member 80 is bent from the rotational axis direction DR1 to the radial direction DR2 at the position PS1 that coincides with the position PS0. It is formed. In this case, the power line connecting portion 61 of the terminal member 60 has a length L5 in the rotation axis direction DR1, and the terminal block fixing portion 62 has a length L6 in the radial direction DR2 (see FIG. 5A). ).

  When the distance from the end surface 21A of the stator core 21 to the end of the power line 30 is the distance L3, the terminal member 80 is bent from the rotation axis direction DR1 to the radial direction DR2 at the position PS2 that coincides with the position PS0, and the terminal member 60 is formed. In this case, the power line connecting portion 61 of the terminal member 60 has a length L7 (> L5) in the rotation axis direction DR1, and the terminal block fixing portion 62 has a length L8 (<L6) in the radial direction DR2. (See (b) of FIG. 5).

  Further, when the distance from the end surface 21A of the stator core 21 to the end of the power line 30 is the distance L4, the terminal member 80 is bent from the rotational axis direction DR1 to the radial direction DR2 at the position PS3 that coincides with the position PS0, and the terminal member 60 is formed. In this case, the power line connecting portion 61 of the terminal member 60 has a length L9 (> L7) in the rotation axis direction DR1, and the terminal block fixing portion 62 has a length L10 (<L8) in the radial direction DR2. (See (c) in FIG. 5).

  Therefore, the length of the power line connecting portion 61 is such that the distance L5, the distance L7 and the distance from the end face 21A of the stator core 21 to the end of the power line 30 are relatively short with the distance L2, the distance L3, and the distance L4. If the distance from the end surface 21A of the stator core 21 to the end of the power line 30 is relatively long with the distance L4, the distance L3, and the distance L2, the distance is relatively long with the distance L9, the distance L7, and the distance L5. Becomes shorter.

  Further, the length of the terminal block fixing portion 62 is such that the distance L6, the distance L8, and the distance when the distance from the end surface 21A of the stator core 21 to the end of the power line 30 becomes relatively short with the distance L2, the distance L3, and the distance L4. If the distance from the end surface 21A of the stator core 21 to the end of the power line 30 is relatively long with the distance L4, the distance L3, and the distance L2, the distance from the end face 21A of the stator core 21 is relatively long with the distance L10, the distance L8, and the distance L6. It becomes long.

  As described above, even if the length of the terminal block fixing portion 62 is changed, the terminal block fixing portion 62 has the elongated hole 620 extending in the radial direction DR2. 50 can be fixed.

  6 is a manufacturing process diagram of the electric motor 100 shown in FIG. Referring to FIG. 6, stator coil 22 is wound around stator core 21, and then coil ends 22 </ b> A and 22 </ b> B are compression-molded to produce stator 20. Then, by fixing the stator core 21 to the case 40, the manufactured stator 20 is accommodated in the case 40. Thereafter, the rotor 10 is inserted on the inner peripheral side of the stator 20. Then, the power line 30 is taken out from the coil end 22A in the rotation axis direction DR1, and the terminal member 80 is attached to the end of the power line 30 (see FIG. 6A).

  The position of the terminal member 80 is roughly determined by attaching the terminal member 80 having a linear shape to the power line 30.

  When the terminal member 80 is attached to the power line 30, the coil ends 22A and 22B are impregnated with varnish. And the terminal member 80 is pinched | interposed with the jigs 15 and 16, the jig 17 is moved to the direction of the arrow 18, and the linear part 81 of the terminal member 80 is bent from the rotation-axis direction DR1 to the radial direction DR2 in the shape of a substantially square character ( (See (b) of FIG. 6).

  In this case, the bending position PSW of the terminal member 80 is determined such that the distance from the end surface 21A of the stator core 21 is the distance L1. That is, the bending position PSW is determined so as to coincide with the position PS0 of one main surface 50A of the terminal block 50. Therefore, when the terminal member 80 is sandwiched between the jigs 15 and 16, the terminal member 80 is sandwiched between the jigs 15 and 16 so that one main surface 15A of the jig 15 coincides with the position PS0.

  When the bending of the terminal member 80 is completed, the terminal block 50 is fixed to the one end 40A of the case 40 so as not to protrude from the outer peripheral surface 40B of the case 40. Then, a screw 70 is inserted into the elongated hole 620 of the terminal block fixing portion 62 of the terminal member 60, and the terminal block fixing portion 62 is fixed to the terminal block 50 (see FIG. 6C). Thereby, the electric motor 100 is produced.

  As described above, after the varnish impregnation of the coil ends 22A and 22B is finished, the bending position PSW of the terminal member 80 is determined so as to coincide with the position PS0 of the one main surface 50A of the terminal block 50. The position can be determined with high accuracy.

  Further, since the terminal block fixing portion 62 of the terminal member 60 is formed by bending the straight portion 81 of the terminal member 80 having the long hole 620, the terminal block fixing of the terminal member 60 is performed even if the bending position PSW changes. The part 62 can be fixed to the terminal block 50 with a screw 70.

  Further, the power line 30 is taken out in the rotation axis direction DR1, and the terminal member 60 has a linear portion 81 of the terminal member 80 at a position PSW coinciding with the one main surface 50A of the terminal block 50 from the rotation axis direction DR1 to the radial direction DR2. Therefore, it is not necessary to move the terminal block 50 in the rotation axis direction DR1 in order to fix the terminal member 60 to the terminal block 50, and the electric motor 100 can be reduced in the rotation axis direction DR1 and the radial direction DR2. .

  FIG. 7 is a schematic block diagram of a transmission mounted on a hybrid vehicle. Referring to FIG. 7, transmission 200 includes an engine 210, motor generators MG <b> 1 and MG <b> 2, and a shaft 220. Motor generator MG1 is connected to engine 210. Motor generator MG1 drives engine 210 or generates power using the power of engine 210. Engine 210 and motor generator MG2 are coupled to shaft 220. Shaft 220 is coupled to drive wheels (not shown).

  In transmission 200, engine 210 is activated by motor generator MG <b> 1 and drives drive wheels via shaft 220. Motor generator MG1 generates electric power using the power of engine 210 that has been started. Motor generator MG2 drives the drive wheels via shaft 220, and generates power using the power of the drive wheels during regenerative braking of the hybrid vehicle.

  The transmission 200 is a transmission mounted on an FR vehicle. The transmission 200 is arranged in a small space such as between seats. Therefore, it is necessary to reduce dimensions LG11, LG21 in the rotation axis direction DR1 and dimensions LG12, LG22 in the radial direction DR2 of motor generators MG1, MG2.

  Electric motor 100 described above is used in transmission 200 as motor generators MG1, MG2. Since the electric motor 100 can be reduced in size in the rotation axis direction DR1 and the radial direction DR2 as described above, it is suitable for the motor generators MG1, MG2 for the transmission 200 arranged in a small space.

  In the above description, the terminal member 60 has the long hole 620. However, the present invention is not limited to this, and the terminal member 60 can be fixed to the terminal block 50 by the screw 70 even if the bending position PSW varies. What is necessary is just to have a part.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  The present invention is applied to an electric motor that can be reduced in arrangement space in an electric motor that is drawn from the coil end of the stator coil in the direction of the rotation axis of the rotor.

1 is a schematic cross-sectional view of an electric motor according to an embodiment of the present invention. It is a top view of the stator seen from the A direction shown in FIG. It is the perspective view and top view of a terminal member shown in FIG. It is the perspective view seen from the rotor shaft side of the terminal block, the terminal member, and screw which are shown in FIG. FIG. 2 is an enlarged view of a stator core, a coil end, a power line, and a terminal member shown in FIG. 1. It is a manufacturing process figure of the electric motor shown in FIG. It is a schematic block diagram of the transmission mounted in a hybrid vehicle.

Explanation of symbols

  1-5 teeth, 10 rotor, 11 rotor shaft, 12 rotor core, 13 magnet, 15-17 jig, 15A, 50A one main surface, 18 arrows, 20 stator, 21 stator core, 21A, 21B end surface of stator core, 40A, one of the cases End, 22 stator coil, 22A, 22B coil end, 30, 30A, 30B, 30C power line, 40 case, 40B outer peripheral surface, 50 terminal block, 60, 60A, 60B, 60C, 80 terminal member, 61 power line connection part 62 terminal block fixing part, 70, 70A, 70B, 70C screw, 81 linear part, 100 electric motor, 200 transmission, 210 engine, 220 shaft, 510-517, 520-527, 530-537 coil, 610 caulking part, 620 Long hole.

Claims (8)

A stator,
A rotor provided rotatably with respect to the stator;
A power line taken from the coil end of the stator coil of the stator in the direction of the rotation axis of the rotor;
A terminal block;
It has a substantially U-shape bent in the radial direction of the rotor from the rotation axis direction of the rotor, and comprises a terminal member that connects the power line to the terminal block,
The terminal member is
A power line connecting portion arranged in the direction of the rotation axis of the rotor and connected to the power line;
An electric motor including a terminal block fixing portion disposed in a radial direction of the rotor and fixed to the terminal block. Further comprising a case provided on the outer peripheral side of the stator,
The electric motor according to claim 1, wherein the terminal block is disposed on an inner peripheral side with respect to an outer peripheral surface of the case.   The said terminal block fixing | fixed part has a long hole extended in the radial direction of the said rotor, and is fixed to one main surface of the said terminal block by the screw member inserted in the said long hole. The electric motor described in 1.   The terminal block fixing portion has a second length in the radial direction of the rotor that can be changed according to a first length from an end surface of the stator core of the stator in the rotation axis direction to an end of the power line. The electric motor according to any one of claims 1 to 3.   5. The second length according to claim 4, wherein the second length is relatively long when the first length is relatively long, and is relatively short when the first length is relatively short. The electric motor described. The power line connecting portion has a second length in the rotation axis direction of the rotor that can be changed according to a first length from an end surface of the stator core of the stator in the rotation axis direction to an end of the power line. And
4. The electric motor according to claim 1, wherein the terminal block fixing portion has a third length that varies in accordance with the first length in a radial direction of the rotor. 5. The second length is relatively short when the first length is relatively long, and is relatively long when the first length is relatively short,
The third length may be relatively long if the first length is relatively long, and relatively short if the first length is relatively short. The electric motor described.   The electric motor according to any one of claims 4 to 7, wherein the first length is a length after the coil end is impregnated with a varnish.

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