JP2005176559A - Motor for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a motor for a vehicle in size and to prevent a vibration from occurring. <P>SOLUTION: The motor for the vehicle includes a cylinder block 3 having an upper block 1 and a lower block 2, a crankshaft 5 having a shaft supported rotatably by bearings 20a of both sides of the cylinder block 3, a stator 8 fixed to three bearings 20b at the center of the cylinder block 3, and a rotor 9 fixed to the outer periphery of the shaft of the crankshaft 5. The rotor 9 is rotated integrally with the crankshaft 5. The inner peripheral surface of the stator 8 is opposed at a predetermined interval over the entire periphery of the outer peripheral surface of the rotor 9. A rotator brought into contact with the outer peripheral surface of the stator 8 and the inner peripheral surface of the rotor 9, is provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle electric motor provided in an engine.

  In conventional vehicle electric motors, as shown in Patent Documents 1 and 2, coils are fixed to both sides of the crankshaft rotation axis direction of a bearing cap that fixes a disc to an engine crankshaft and rotatably supports the crankshaft. And a permanent magnet is provided on the disk corresponding to the coil.

JP 2003-61325 A JP 2003-54267 A

  However, in such a vehicular electric motor, since the stator is provided on both sides of the bearing cap in the crankshaft rotation axis direction, the dimension of the vehicular electric motor in the crankshaft rotation axis direction is large, leading to an increase in the size of the engine. It can be a cause. The rotor is composed of a disc fixed to the crankshaft and a permanent magnet provided on the disc corresponding to the stator coil, and the stator can be set only about half the rotor outer circumference. However, a uniform torque cannot be generated and vibration may occur.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a vehicle electric motor that is compact and does not generate vibration.

  In order to achieve this object, in the present invention, a rotor is fixed to the outer periphery of an engine crankshaft, and a stator having an inner peripheral surface facing the entire outer peripheral surface of the rotor on the cylinder block of the engine is provided. A rotating body that is fixed and is in contact with the outer peripheral surface of the stator and the inner peripheral surface of the rotor is provided.

  The vehicle electric motor according to the present invention is compact because the size of the vehicle electric motor in the direction of the rotation axis of the crankshaft does not increase, and the inner peripheral surface of the stator faces the entire outer peripheral surface of the rotor. Therefore, vibration does not occur.

(First embodiment)
1 is a schematic cross-sectional view showing a part of an engine having a vehicular electric motor according to the present invention, FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a schematic front sectional view showing the vehicle motor shown in FIGS. 1 to 3, and FIG. 5 is a schematic enlarged plan view showing a part of the vehicle motor shown in FIG. As shown in the figure, a cylinder block 3 is composed of an upper block 1 on the upper side and a lower block 2 on the lower side, and pins 13 for positioning the upper block 1 and the lower block 2 are provided. A cylinder 4 is provided in the upper block 1, and a shaft portion of the crankshaft 5 is rotatably supported by bearing portions 20 a on both sides of the cylinder block 3. A piston 6 is provided in the cylinder 4, and is connected to the piston 6. The leading end of the connecting rod 7 is rotatably attached to the crankpin of the crankshaft 5. Further, the stator 8 is fixed to the three bearing portions 20 b at the center of the cylinder block 3, the rotor 9 is fixed to the outer periphery of the shaft portion of the crankshaft 5, and the rotor 9 rotates integrally with the crankshaft 5. The inner peripheral surface of the stator 8 is opposed to the entire outer peripheral surface of the rotor 9 with a predetermined interval. That is, the stator 8 is composed of two semi-annular divided stators 8a and 8b divided into two in the circumferential direction, and the mounting brackets 11a and 11b are fixed to the divided stators 8a and 8b. The upper block 1 and the lower block 2 are fixed by bolts 12. That is, the divided stator 8 a is fixed to the upper block 1, and the divided stator 8 b is fixed to the lower block 2. Further, the rotor 9 is composed of two semi-annular divided rotors 9a and 9b divided into two in the circumferential direction, and the crankshaft 5 is seen from the direction perpendicular to the rotation axis direction of the crankshaft 5 by the divided rotors 9a and 9b. A band 16 made of a non-magnetic material such as stainless steel or aluminum is provided on the outer peripheral surface of the rotor 9, and the rotor 9 is fixed to the shaft portion of the crankshaft 5. Grooves are provided in the shaft portion and the rotor 9, and a key 14 is inserted into these grooves, and pins 15 for positioning the divided rotors 9a and 9b are provided. A plurality of permanent magnets 17 are provided along the inner periphery of the rotor 9, a plurality of recesses 18 are provided on the outer periphery of the rotor 9, and the recesses 18 are provided corresponding to the permanent magnets 17. The central angle of the circular arc of the cross-sectional shape exceeds 180 degrees, and a rotating body 19 made of a magnetic material is accommodated in each recess 18. That is, by accommodating at least a part of the rotating body 19 on the outer periphery of the rotor 9, the movement of the rotating body 19 in the direction along the outer periphery of the rotor 9 is restricted and the rotating body 19 is arranged in the direction of the rotation axis of the rotor 9. The rotating body 19 is in contact with the outer peripheral surface of the stator 8 and the inner peripheral surface of the rotor 9, and the rotating body 19 is rotatable with the rotation of the rotor 9. is there.

  Next, a method for assembling the engine having the vehicle electric motor shown in FIGS. 1 to 5 will be described. First, the rotor 9 is attached to the crankshaft 5 by providing the band 16 on the outer peripheral surface of the rotor 9 with the split rotors 9a and 9b sandwiching the shaft portion of the crankshaft 5 from the direction orthogonal to the rotation axis direction of the crankshaft 5. Secure to the shaft. In this case, the key 14 is inserted into the shaft portion of the crankshaft 5 and the groove of the rotor 9, and the pin 15 is provided between the divided rotors 9a and 9b. Next, the rotating body 19 is accommodated in the recess 18. Next, the mounting brackets 11 a and 11 b are fixed to the upper block 1 and the lower block 2 with bolts 12, thereby fixing the divided stators 8 a and 8 b to the upper block 1 and the lower block 2. Next, the tip of the connecting rod 7 is attached to the crankpin of the crankshaft 5 so as to be rotatable. Next, the lower block 2 is attached to the upper block 1. In this case, the shaft portion of the crankshaft 5 is rotatably supported by the bearing portions 20 a on both sides of the cylinder block 3, and a pin 13 is provided between the upper block 1 and the lower block 2.

  In this vehicle electric motor, when the winding (not shown) of the stator 8 is energized, the rotor 9 and the crankshaft 5 rotate. In addition, the rotating body 19 contacts the outer peripheral surface of the stator 8 and the inner peripheral surface of the rotor 9, and the rotating body 19 can rotate with the rotation of the rotor 9, so the rotor 9 rotates with respect to the stator 8. Therefore, the vehicle electric motor can rotatably support the crankshaft 5 on the bearing portion 20b.

  Such a vehicular motor is compact because the dimension of the crankshaft 5 of the vehicular motor in the direction of the rotation axis does not increase. Further, since the inner peripheral surface of the stator 8 is opposed over the entire outer peripheral surface of the rotor 9, smooth torque can be generated, and no vibration is generated. Further, since the rotating body 19 is made of a magnetic material, the number of flux linkages is increased, so that the generated torque is increased. Therefore, even if the rotating body 19 is provided in the bearing portion 20b having a small space, a sufficient torque can be generated. Further, since the stator 8 is constituted by the divided stators 8a and 8b and the rotor 9 is constituted by the divided rotors 9a and 9b, it is possible to divert the assembly order of the engine as much as possible and to reduce the manufacturing cost. it can. In addition, since the band 16 is made of a nonmagnetic material, induction heating due to an alternating magnetic field can be prevented. In addition, since the central angle of the arc of the cross-sectional shape of the recess 18 exceeds 180 degrees, when the rotating body 19 is accommodated in the recess 18, the rotating body 19 does not escape from the rotor 9 in the radial direction of the rotor 9. Since the rotating body 19 does not come off the rotor 9 during assembly, the assembly can be easily performed.

(Second Embodiment)
6 is a schematic front sectional view showing a part of another vehicle motor according to the present invention, and FIG. 7 is a schematic plan view showing a part of the vehicle motor shown in FIG. As shown in the figure, the divided rotor 9a is provided with a plurality of cutout portions 21, bolt holes 22 are provided at the bottom of the cutout portions 21 of the divided rotor 9a, and the bolt holes 22 are divided from the divided rotor 9a. It has reached the joint surface with the rotor 9b, the center line of the bolt hole 22 is perpendicular to the joint surface with the split rotor 9b of the split rotor 9a, and there are a plurality of joint surfaces on the split rotor 9b of the split rotor 9b. The female screw 23 is provided, and the center line of the female screw 23 and the center line of the bolt hole 22 coincide with each other. A bolt 24 made of a non-magnetic material such as stainless steel passes through each bolt hole 22 and is screwed with each female screw 23, and the divided rotor 9 a and the divided rotor 9 b are connected by the bolt 24. .

  In such a vehicular electric motor, since it is not necessary to divide the rotating body 19 in the direction of the rotation axis of the crankshaft 5, the number of flux linkages can be further increased, and the generated torque can be further increased. . Further, since the bolt 24 is made of a non-magnetic material, induction heating due to an alternating magnetic field can be prevented.

(Third embodiment)
FIG. 8 is a schematic sectional view showing another vehicle electric motor according to the present invention. As shown in the figure, a plurality of rotating bodies 19 are provided between the inner peripheral surface of the stator 8 and the outer peripheral surface of the rotor 9. That is, no recess is provided on the inner peripheral surface of the stator 8 and the outer peripheral surface of the rotor 9.

  When assembling the engine having this vehicle electric motor, after the rotating body 19 is positioned on the outer peripheral portion of the rotor 9, the outer peripheral portion of the rotor 9 is used by using an extremely thin annular rotating body retaining jig. The rotating body 19 is held and the lower block 2 is attached to the upper block 1 to remove the rotating body retaining jig.

  In such a vehicular electric motor, the permanent magnets 17 can be arranged outside the rotor 9 and the permanent magnets 17 can be arranged in the circumferential direction of the rotor 9 to the maximum, so that the output torque is increased. can do.

(Fourth embodiment)
FIG. 9 is a schematic sectional view showing another vehicle electric motor according to the present invention. As shown in the figure, a plurality of recesses 31 are provided on the inner peripheral portion of the stator 8, the central angle of the arc of the cross-sectional shape of the recess 31 exceeds 180 degrees, and the rotating body 19 is accommodated in the recess 31. . That is, by accommodating at least a part of the rotating body 19 in the inner periphery of the stator 8, the movement of the rotating body 19 in the direction along the outer periphery of the rotor 9 is restricted, and the rotating body 19 is connected to the rotating shaft of the rotor 9. A concave portion 31 is provided to support the rotation about the direction, and the rotating body 19 is in contact with the outer peripheral surface of the stator 8 and the inner peripheral surface of the rotor 9, and the rotating body 19 can rotate as the rotor 9 rotates. It is.

  In such a vehicular electric motor, the central angle of the arc of the cross-sectional shape of the recess 31 exceeds 180 degrees. Therefore, when the rotating body 19 is accommodated in the recess 31, the rotating body 31 moves from the stator 8 to the radius of the stator 8. Since it does not come off in the direction, the rotating body 19 does not come off from the stator 8 during assembly, so that the assembly can be performed easily. In addition, the permanent magnet 17 can be disposed on the outer side of the rotor 9, and the permanent magnet 17 can be disposed in the circumferential direction of the rotor 9 to the maximum, so that the output torque can be increased.

(Fifth embodiment)
FIG. 10 is a schematic cross-sectional view showing another vehicle electric motor according to the present invention. As shown in the figure, a recess 18 is provided in the rotor 9, and a rotating body 19 is accommodated in the recess 18. A plurality of embedding materials 41 made of a non-magnetic material are provided between the recesses 18 on the outer peripheral portion of the rotor 9 made of a magnetic material. That is, at least the outer peripheral portion of the rotor 9 is composed of a magnetic body portion and a non-magnetic body portion, the concave portion 18 is provided corresponding to the magnetic body portion of the outer peripheral portion of the rotor 9, and the rotating body 19 is the outer peripheral portion of the rotor 9. It is provided corresponding to the magnetic part.

  In this vehicle electric motor, since the rotor 9 has saliency, it functions as a synchronous reluctance motor.

  Since such a vehicular electric motor does not include a permanent magnet, iron powder or the like generated inside the engine can be prevented from adhering to the rotor 9, and even if the internal temperature of the engine becomes high. The performance is not degraded.

(Sixth embodiment)
FIG. 11 is a schematic cross-sectional view showing another vehicle electric motor according to the present invention. As shown in the figure, a recess 31 is provided in the stator 8, and the rotating body 19 is accommodated in the recess 31. A plurality of embedding materials 41 made of a non-magnetic material are provided on the outer periphery of the rotor 9 made of a magnetic material, and at least the outer periphery of the rotor 9 is composed of a magnetic material portion and a non-magnetic material portion.

  In this vehicle electric motor, since the rotor 9 has saliency, it functions as a synchronous reluctance motor.

  Since such a vehicular electric motor does not include a permanent magnet, iron powder or the like generated inside the engine can be prevented from adhering to the rotor 9, and even if the internal temperature of the engine becomes high. The performance is not degraded. Further, the embedding material 41 can be arranged to the maximum in the circumferential direction of the rotor 9.

(Seventh embodiment)
FIG. 12 is a schematic sectional view showing another vehicle electric motor according to the present invention. As shown in the figure, a recess 18 is provided in the rotor 9, and a rotating body 19 is accommodated in the recess 18. A plurality of gaps 51 are provided between the recesses 18 on the outer peripheral portion of the rotor 9 made of a magnetic material, and at least the outer peripheral portion of the rotor 9 is composed of a magnetic body portion and a gap portion.

  In this vehicle electric motor, since the rotor 9 has saliency, it functions as a synchronous reluctance motor.

  Since such a vehicular electric motor does not include a permanent magnet, iron powder or the like generated inside the engine can be prevented from adhering to the rotor 9, and even if the internal temperature of the engine becomes high. The performance is not degraded. Further, since there is no need to provide an embedding material, the manufacturing cost is low.

  In addition, this invention is not limited to the above embodiment, You may combine either of the above embodiment.

  In the above-described embodiment, the vehicle motor has been described. However, the present invention can also be applied to a vehicle generator. That is, the present invention can be applied to a vehicular rotating electrical machine.

It is a schematic sectional drawing which shows a part of engine which has the motor for vehicles which concerns on this invention. FIG. 2 is an enlarged AA cross-sectional view of FIG. 1. It is BB sectional drawing of FIG. FIG. 4 is a schematic front sectional view showing the vehicle motor shown in FIGS. 1 to 3. FIG. 5 is a schematic enlarged plan view showing a part of the vehicle electric motor shown in FIG. 4. It is a schematic front sectional view showing a part of another vehicle electric motor according to the present invention. FIG. 7 is a schematic plan view showing a part of the vehicle electric motor shown in FIG. 6. It is a schematic sectional drawing which shows the other motor for vehicles which concerns on this invention. It is a schematic sectional drawing which shows the other motor for vehicles which concerns on this invention. It is a schematic sectional drawing which shows the other motor for vehicles which concerns on this invention. It is a schematic sectional drawing which shows the other motor for vehicles which concerns on this invention. It is a schematic sectional drawing which shows the other motor for vehicles which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Upper block 2 ... Lower block 3 ... Cylinder block 5 ... Crankshaft 8 ... Stator 8a ... Split stator 8b ... Split stator 9 ... Rotor 9a ... Split rotor 9b ... Split rotor 10 ... Vehicle motor 16 ... Band 17 ... Permanent magnet DESCRIPTION OF SYMBOLS 18 ... Concave 19 ... Rotating body 24 ... Bolt 31 ... Concave 41 ... Embedded body 51 ... Air gap

Claims (17)

A rotor fixed to the outer periphery of the crankshaft of the engine and rotating integrally with the crankshaft;
A stator fixed to a cylinder block of the engine, including an inner peripheral surface facing the outer peripheral surface of the rotor across the entire circumference at a predetermined interval;
An electric motor for a vehicle comprising: a rotating body that is in contact with an inner peripheral surface of the stator and an outer peripheral surface of the rotor and is rotatable with the rotation of the rotor.   The vehicle electric motor according to claim 1, further comprising a permanent magnet along an inner periphery of the rotor.   The vehicle electric motor according to claim 2, wherein the rotating body is made of a magnetic material.   By accommodating at least a part of the rotating body on the outer periphery of the rotor, the movement of the rotating body in the direction along the outer periphery of the rotor is restricted, and the rotating body is pivoted about the rotation axis direction of the rotor. 4. The vehicular electric motor according to claim 3, further comprising a concave portion that is rotatably supported.   The vehicular electric motor according to claim 4, wherein the concave portion is provided corresponding to the permanent magnet.   By accommodating at least a part of the rotating body on the inner periphery of the stator, the movement of the rotating body in the direction along the outer periphery of the rotor is restricted, and the rotating body is arranged in the direction of the rotation axis of the rotor. 4. The vehicular electric motor according to claim 3, further comprising a concave portion that is rotatably supported as a shaft.   The motor for a vehicle according to claim 1, wherein at least an outer peripheral portion of the rotor is composed of a magnetic body portion and a non-magnetic body portion.   The vehicular electric motor according to claim 7, wherein the rotating body is made of a magnetic material.   By accommodating at least a part of the rotating body on the outer periphery of the rotor, the movement of the rotating body in the direction along the outer periphery of the rotor is restricted, and the rotating body is pivoted about the rotation axis direction of the rotor. 9. The vehicular electric motor according to claim 8, further comprising a concave portion that is rotatably supported.   The vehicular electric motor according to claim 9, wherein the concave portion is provided corresponding to the magnetic body portion of the outer peripheral portion of the rotor.   By accommodating at least a part of the rotating body on the inner periphery of the stator, the movement of the rotating body in the direction along the outer periphery of the rotor is restricted, and the rotating body is arranged in the direction of the rotation axis of the rotor. The vehicular electric motor according to claim 8, wherein a concave portion that is rotatably supported as a shaft is provided.   2. The vehicle motor according to claim 1, wherein at least an outer peripheral portion of the rotor is constituted by a magnetic body portion and a gap portion.   13. The vehicle electric motor according to claim 12, wherein the rotating body is made of a magnetic material.   By accommodating at least a part of the rotating body in the magnetic body portion of the outer peripheral portion of the rotor, the movement of the rotating body in the direction along the outer periphery of the rotor is restricted, and the rotating body is moved to the rotor. 14. The vehicular electric motor according to claim 13, further comprising a concave portion that is rotatably supported around the rotation axis direction of the motor. The cylinder block is composed of an upper upper block and a lower lower block.
The rotor is composed of two semi-annular divided rotors divided into two in the circumferential direction, and the rotor is sandwiched by sandwiching the crankshaft from a direction perpendicular to the rotation axis direction of the crankshaft. Fixed to the crankshaft,
The stator is composed of two semi-annular split stators divided into two in the circumferential direction, one of the split stators being fixed to the upper block, and the other of the split stators being fixed to the lower block. The vehicular electric motor according to claim 1, wherein the vehicular electric motor is provided.   16. The vehicle electric motor according to claim 15, wherein a band is provided on an outer peripheral surface of the two divided rotors.   16. The vehicle electric motor according to claim 15, wherein the two divided rotors are connected by bolts.

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