JP2006158083A - Mounting structure of rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of a rotating electric machine that effectively alleviates vibration without causing deterioration in productivity. <P>SOLUTION: The mounting structure 1 of the rotating electric machine comprises: a case 70 having an internal space 72; a stator 53 of the rotating electric machine 50 accommodated in the internal space 72; bolts 10 for positioning the stator 53 in the case 70 by pressing the stator 53 toward the case 70 in the thrust direction; and a vibration alleviating member 90 that is positioned outside the bolts 10 in the radial direction of the stator 53, interposed between the internal surface 71 of the case 70 and the external peripheral surface of the stator 53, and has a swelling property. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mounting structure for a rotating electrical machine, and more particularly to a mounting structure for a rotating electrical machine for a vehicle.

Conventional mounting structures for rotating electrical machines are disclosed in, for example, Japanese Patent No. 2942381 (Patent Document 1), Japanese Patent Laid-Open No. 4-185245 (Patent Document 2), and Utility Model Registration No. 3014309 (Patent Document 3). .
Japanese Patent No. 2942381 JP-A-4-185245 Utility Model Registration No. 3014309

  Patent Document 1 discloses an AC generator in which a vibration damping member having a high thermal expansion coefficient is filled between a stator and a case.

  Patent Document 2 discloses a stator of a foil motor in which a cushioning material that absorbs a difference in thermal expansion is provided between a case and the stator.

  Patent Document 3 discloses a technique in which a gel (buffer material) of a crosslinked silicon polymer swollen with silicon oil is provided between opposite ends of a permanent magnet and a rotor iron core.

  However, the conventional technique has a problem that productivity is lowered.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a mounting structure for a rotating electrical machine capable of achieving both improvement in productivity and reduction in vibration transmission of the rotating electrical machine. For the purpose.

  The rotating electrical machine mounting structure according to the present invention includes a case having an internal space, a stator of the rotating electrical machine housed in the internal space, and positioning the stator in the case by pressing the stator in the thrust direction toward the case. And a vibration damping member having swelling property interposed between the inner surface of the case and the outer peripheral surface of the stator.

  In the rotating electrical machine mounting structure configured as described above, a vibration damping member having a swellability located between the inner surface of the case and the outer peripheral surface of the stator is provided outside the pressing portion in the radial direction of the stator. Therefore, vibration transmission can be reduced by the vibration damping member.

  Furthermore, since the vibration damping member has swelling property, it is small in the assembled state, and is assembled to absorb the liquid and become large. As a result, productivity is not reduced.

  Preferably, the mounting structure of the rotating electric machine further includes a high vibration damping member that is interposed between the vibration damping member and the stator or the case and has a larger attenuation factor than the vibration damping member.

  In this case, the vibration transmission of the rotating electrical machine can be more reliably reduced by the high vibration damping member. Here, the attenuation rate represents vibration in amplitude and indicates the amplitude ratio of adjacent peaks of the amplitude. That is, the vibration of the rotating electrical machine is represented by an amplitude, and the amplitude ratio of adjacent peaks of this amplitude is the attenuation rate.

  Preferably, the mounting structure of the rotating electric machine further includes a liquid supply unit that supplies the liquid to the vibration damping member. In this case, it is possible to securely fit the vibration damping member between the stator and the case by supplying the liquid from the liquid supply unit to the vibration damping member and swelling the vibration damping member.

  Preferably, the radial end surface of the stator is separated from the inner surface of the case. In this case, since the radial end face of the stator is separated from the inner surface of the case and contacts only the vibration damping member having swelling property, vibration is not directly transmitted from the stator to the case. As a result, vibration can be further attenuated.

  Preferably, the vibration damping member is in contact with the outer peripheral surface on the stator free end side. In this case, the vibration damping member can attenuate the vibration of the free end of the stator.

  According to this invention, it is possible to provide a mounting structure for a rotating electrical machine that can reduce the transmission of vibrations of the rotating electrical machine without reducing productivity.

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

(Embodiment 1)
1 is a front view of a rotating electrical machine mounting structure according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. Referring to FIG. 1 and FIG. 2, the rotating electrical machine mounting structure 1 includes a case 70 having an internal space 72, a stator 53 of the rotating electrical machine 50 housed in the internal space 72, and the stator 53 toward the case 70. A bolt 10 as a pressing portion for positioning the stator 53 in the case 70 by pressing in the thrust direction indicated by the arrow 2, and a radial direction (direction indicated by the arrow 3) of the stator 53 outside the bolt 10, And a vibration damping member 90 having a swelling property interposed between an inner surface 71 of 70 and an outer peripheral surface (radial end surface 58) of the stator 53.

  A vibration damping member 90 is provided on the outer peripheral surface on the free end side of the stator 53.

  The rotating electrical machine mounting structure 1 further includes a liquid supply unit 110 that supplies oil 111 as a liquid to the vibration damping member 90. The radial end surface 58 of the stator 53 is separated from the inner surface 71 of the case 70.

  The stator 53 of the rotating electrical machine 50 is fixed by the bolt 10, and at least one vibration damping member 90 having swelling properties is provided on the opposite side of the fixing direction of the bolt 10 in the circumferential direction.

  As shown in FIG. 1, the case 70 has a cylindrical shape, and the stator 53 is disposed in a space surrounded by the inner surface 71 thereof. The case 70 may have a rectangular tube shape instead of a cylindrical shape. Further, the inner surface 71 as the inner peripheral surface need not be cylindrical, but may be square. A stator 53 is accommodated in the case 70.

  A plurality of coils 52 are wound around the stator 53, and any of distributed winding and concentrated winding can be adopted as a winding method. A rotor 54 is fitted in a stator 53 made of a magnetic material (for example, iron), and the rotor 54 can freely rotate with respect to the stator 53. As shown in FIG. 1, the stator 53 and the rotor 54 are arranged concentrically.

  On the other hand, the inner surface 71 has an elliptical shape and is arranged away from the stator 53. The stator 53 is fixed to the case 70 by three bolts 10. The number of bolts 10 is not limited to three, and a plurality of bolts may be arranged. The bolt 10 penetrates the stator 53 and attaches the stator 53 to the case 70 by an axial force.

  A vibration damping member 90 is filled in the gap between the stator 53 and the case 70. The vibration damping member 90 is made of polymer, rubber, or the like, and swells by containing, for example, oil, thereby increasing the volume. That is, in the state shown in FIGS. 1 and 2, the vibration damping member 90 is in a state of containing oil and sufficiently expanded. Before the stator 53 is housed in the case 70, the vibration damping member 90 does not contain liquid, so the volume is small, and the size is easy to insert between the stator 53 and the case 70.

  Although only one vibration damping member 90 is provided in FIG. 1, the present invention is not limited to this, and a plurality of vibration damping members 90 may be disposed between the stator 53 and the case 70. In addition, the vibration damping members 90 may be arranged at unequal intervals as well as at equal intervals.

  As shown in FIG. 2, the case 70 has an internal space 72 in which the rotating electrical machine 50 and the like are disposed. The rotating electrical machine 50 includes a stator 53 as a stator and a rotor 54 as a rotor. The stator 53 further includes a stator core 51 made of an iron core, and a coil 52 made of a copper wire wound around the stator core 51. The motor shown here is a three-phase motor, and is constituted by a three-phase motor having a U phase, a V phase, and a W phase. The rotating electrical machine 50 of the present invention need not be limited to a three-phase motor, and may be another type of motor. The rotating electrical machine 50 may be used not as a motor but as a generator.

  A rotor 54 is disposed in a donut-shaped stator 53. A permanent magnet is embedded in the rotor 54, and the rotor 54 rotates by an attractive force and a repulsive force between the permanent magnet and the magnetic force generated by the stator 53. The rotor 54 is attached to the rotating shaft 56. The rotation shaft 56 is an output shaft, and the rotation of the rotation shaft 56 is transmitted to the shaft 23 via the gears 22 and 21.

  Bolts 10 are provided so as to penetrate the stator 53. The tip of the bolt 10 is screwed into the case 70 and the stator 53 is fixed to the case 70 by the bolt 10. The fixing method is not limited to the bolt 10. For example, an embedded bolt may be disposed on the case 70 side, the embedded bolt may penetrate the stator 53, and the stator 53 may be attached to the case 70 by screwing a nut into the bolt.

  Alternatively, the stator 53 may be pressed in the thrust direction indicated by the arrow 2 by an elastic body, and the stator 53 may be fixed to the case 70 by this pressing force.

  The stator 53 has a radial end surface 58 and a thrust end surface 57. The thrust end surface 57 is pressed against the inner surface 71 of the case 70 by the bolt 10. On the other hand, most of the radial end face 58 is not in contact with the inner surface 71 of the case 70, and the vibration damping member 90 is in contact with only a part thereof. The vibration damping member 90 contacts both the inner surface 71 of the case 70 and the radial end surface 58 as the outer surface of the stator 53, and absorbs vibrations of the stator 53 and the case 70. The vibration damping member 90 is supplied with oil 111 as a liquid from a liquid supply unit 110 as an oil supply port.

  The liquid supply unit 110 is not necessarily provided, and may be configured such that the rotor 54 scoops up oil and the oil is supplied to the vibration damping member 90. In the rotating electrical machine 50 as a motor / generator for driving the vehicle, vibrations such as motor noise are generated. Gear noise is generated by the gears 21 and 22. Arrows 30 and 40 indicate vibration transmission paths.

  When the stator 53 is positioned with respect to the case 70 and fixed using the bolts 10, the stator 53 is in a so-called cantilever state. On the free end side of the stator 53, a vibration damping member 90 having swelling property is disposed between the stator 53 and the case 70 in an arbitrary direction, so that the vibration of the stator 53 and the case 70 is attenuated while the vibration is applied to the vehicle. It is not transmitted in the direction in which it easily enters the chamber 100. Thereby, the vibration transmitted into the passenger compartment 100 can be greatly reduced.

  In addition, by assembling the vibration damping member 90 in a dry state, a large gap can be secured between the stator 53 and the case 70 and the vibration damping member 90, so that the vibration can be swollen during use without deteriorating the assembling property. Can be reduced.

  That is, when used, the vibration damping member 90 is made to swell with oil 111 such as lubricating oil or cooling oil so that the stator 53, the vibration damping member 90, and the case 70 are brought into close contact with each other, thereby reducing vibration.

  As described above, the rotating electrical machine mounting structure 1 according to the first embodiment of the present invention can provide a structure capable of damping the vibration without deteriorating the assemblability.

(Embodiment 2)
FIG. 3 is a front view of a rotating electrical machine mounting structure according to the second embodiment of the present invention. 4 is a cross-sectional view taken along line IV-IV in FIG. Referring to FIGS. 3 and 4, in rotary electric machine mounting structure 1 according to the second embodiment of the present invention, high vibration damping member 91 having a higher damping ratio is provided between vibration damping member 90 and case 70. Is different from the mounting structure of the rotating electrical machine according to the first embodiment. As the high-vibration damping member 91, any one having swelling property or not having swelling property can be adopted. 3 and 4, the high vibration damping member 91 is provided between the case 70 and the vibration damping member 90. However, the present invention is not limited to this, and the high vibration damping member 91 is provided between the vibration damping member 90 and the stator 53. May be provided.

  That is, in the rotating electrical machine mounting structure 1 according to the second embodiment, the high vibration damping member 91 having a larger damping ratio than the vibration damping member 90 interposed between the vibration damping member 90 and the stator 53 or the case 70. Is further provided. The high vibration damping member 91 may be provided on both sides of the vibration damping member 90 and may be in contact with both the case 70 and the stator 53.

  The high vibration damping member 91 has a higher damping rate than the vibration damping member 90. Thereby, vibration can be reduced more effectively. The shapes of the vibration damping member 90 and the high vibration damping member 91 do not require the function of fixing the stator 53, and thus have a high degree of freedom and can be processed into a shape effective for vibration damping.

  The thus configured rotating electrical machine mounting structure 1 according to the second embodiment has the same effects as the rotating electrical machine mounting structure according to the first embodiment.

  Although the embodiment of the present invention has been described above, the embodiment shown here can be variously modified.

  First, the mounting structure of a rotating electrical machine to which the present invention is applied is not limited to an electric vehicle, a hybrid vehicle, and a fuel cell vehicle, and can be applied to a rotating electrical machine (for example, a bicycle or a train) other than an automobile. Moreover, it is possible to apply this invention to the mounting structure of a generator.

  Further, in this example, an example in which the present invention is applied as a driving device for an electric vehicle such as a hybrid vehicle is shown. However, the present invention is not limited to this, and the present invention may be applied as a power generator for an electric automobile.

  In addition, the present invention can be applied to a structure such as an in-foil motor.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be applied to a mounting structure of a rotating electrical machine for a vehicle, for example.

It is a top view of the mounting structure of the rotary electric machine according to Embodiment 1 of this invention. It is sectional drawing along the II-II line | wire in FIG. It is a front view of the mounting structure of the rotary electric machine according to Embodiment 2 of this invention. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Mounting structure of rotary electric machine, 50 Rotary electric machine, 53 Stator, 54 Rotor, 70 Case, 71 Inner surface, 72 Internal space, 90 Vibration damping member.

Claims (5)

A case having an internal space;
A rotating electric machine stator housed in the internal space;
A pressing portion for positioning the stator within the case by pressing the stator in a thrust direction toward the case;
A rotating electrical machine mounting structure comprising a vibration damping member having swelling property interposed between an inner surface of the case and an outer peripheral surface of the stator.   The rotating electrical machine mounting structure according to claim 1, further comprising a high vibration damping member interposed between the vibration damping member and the stator or the case and having a larger damping ratio than the vibration damping member.   The mounting structure for a rotating electrical machine according to claim 1, further comprising a liquid supply unit that supplies liquid to the vibration damping member.   4. The mounting structure for a rotating electrical machine according to claim 1, wherein a radial end surface of the stator is separated from an inner surface of the case. 5.   The rotating electrical machine mounting structure according to any one of claims 1 to 4, wherein the vibration damping member is in contact with an outer peripheral surface of the stator free end side.

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