JP5282591B2 - Rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electrical machine capable of effectively improving energy efficiency thereof, by making a uniform tensile strength act on a stator core. <P>SOLUTION: A plurality of extending portions 9, extending to the outside of a radial direction are provided on the outer circumferential portion of an annular stator core 3, formed by laminating a plurality of electromagnetic steel plates 20 in the rotor shaft direction; the extending portions 9 are equipped with a protruding portion consisting of a rod-like member 11 which protrudes in a direction parallel to the shaft direction of the rotor; and the protruding portion is provided with a press-insertion member 4 which is to be press-inserted, from the inside of the diameter direction of the stator core 3. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a rotating electrical machine including an electric motor or a generator provided with a stator core in which a plurality of electromagnetic steel plates are laminated in the rotor axial direction.

  The rotating electrical machine composed of the electric motor or the generator converts electrical energy into rotational force, or converts rotational force into electrical energy, and contributes to energy saving by effectively improving the conversion efficiency. It is hoped that. For example, in an electric vehicle using an electric motor as a drive source or a hybrid vehicle that obtains driving force by combining an engine and an electric motor, conversion of electric energy and rotational force in a wide load region from light load region to high load region There is a need to reduce the consumption of electrical energy and fuel by improving efficiency.

  For the purpose of improving the performance of the rotating electrical machine, a unidirectional electrical steel sheet having an easy magnetization axis in one direction, a bidirectional electrical steel sheet having easy magnetization axes in two directions orthogonal to each other, or an easy magnetization axis is specified. Forming a stator core of a rotating electrical machine by stamping and forming any of the non-oriented electrical steel sheets that do not have the directionality to a predetermined shape, and stacking and integrating the plurality of punched electrical steel sheets Has been done. For example, when the stator core is formed of a unidirectional electrical steel sheet having excellent magnetic properties in a specific direction, a tooth member formed so as to exhibit excellent magnetic properties in the radial direction of the stator core, Theoretically, the iron loss of the stator core can be effectively reduced by combining with the formed yoke member that exhibits excellent magnetic properties in the circumferential direction.

  However, since an air gap having a large magnetic resistance is generated at the contact portion between the tooth member and the yoke member of the stator core formed of the unidirectional electrical steel sheet, there is a problem that the magnetic flow is obstructed in this portion. In addition, since the unidirectional electrical steel sheet or the bi-directional electrical steel sheet is more expensive than the non-oriented electrical steel sheet, the stator core is formed of the non-oriented electrical steel sheet and the stator core is used for the purpose of reducing the iron loss. It has been proposed to apply a circumferential tensile stress to the yoke portion.

  For example, in Patent Document 1 below, in an inner rotor type motor having a motor case and a stator core (stator), both of the motor case and the stator core are fixed in a state in which a difference in thermal expansion occurs, or the stator core A structure is suggested in which a tensile stress is applied to the stator core by bringing a holding member into contact with the inner peripheral surface and applying a pressing force to the outer side, thereby obtaining a certain degree of iron loss reduction effect. .

JP 2006-223015 A

  In the first embodiment disclosed in Patent Document 1, the inner diameter of the motor case is made to be slightly larger than the outer periphery of the stator core, and the stator core is heated to expand, or the motor case is cooled to contract. As a result, the stator core is inserted into the motor case at a time when the diameter and the fitting portion are properly fitted, and both are fixed, and then returned to room temperature to return the diameter to the yoke portion (joint portion) of the stator core. It is comprised so that the tensile stress of a direction may act.

  However, as shown in the first embodiment of Patent Document 1, the tapered fitting portions provided corresponding to the inner peripheral portion of the motor case and the outer peripheral portion of the stator core are fitted in an appropriate state, respectively. In the case where the size and temperature of the stator core or the motor case are controlled so that a predetermined tensile stress can be applied to the yoke portion of the stator core, both the size and the temperature are appropriately managed. This is extremely difficult and impractical.

  Further, in the second embodiment of Patent Document 1, a plurality of holding members integrated with the bottom of the motor case are brought into contact with the stator core from the inside of the slot and pressed outwardly of the stator core to the yoke portion. A configuration is disclosed in which the holding of the stator core and the improvement of the magnetic properties can be achieved simultaneously by applying a tensile stress. Furthermore, Patent Document 1 describes that in order to increase the strength of the holding member, it is preferable to fix the holding member from the upper surface side with an upper surface portion mounting bolt of the motor case.

  However, as disclosed in FIG. 5 and FIG. 6 of the above-mentioned Patent Document 1, when a holding member is arranged for each of a plurality of slots provided in the stator core and fixed with bolts, the rotor shaft Due to the dimensional error from the center to the bolt hole position, the pressing force applied from the holding member to the stator core is likely to vary, and as a result, it is possible to avoid applying an uneven tensile stress in the circumferential direction of the stator core. Absent. Furthermore, since each said holding member is being fixed only with the attachment volt | bolt only from the upper surface part side of the motor case, it cannot be given uniform tensile stress to each of each electromagnetic steel plate laminated | stacked on the said rotor axial direction. There was a problem.

  The present invention has been made in view of the above problems, and provides a rotating electrical machine capable of improving the effect of reducing iron loss and increasing the magnetic flux density by applying a uniform tensile stress to the stator core. The purpose is to do.

  In the invention according to claim 1, a plurality of extending portions extending radially outward are provided on the outer peripheral portion of an annular stator core formed by laminating a plurality of electromagnetic steel plates in the rotor axial direction. The installation part is provided with a protruding part that protrudes in a direction parallel to the axial direction of the rotor, and is provided with a press-fitting member that is pressed into the protruding part from the radially inner side of the stator core.

  According to a second aspect of the present invention, in the rotating electrical machine according to the first aspect, an insertion hole substantially parallel to the rotor shaft is formed in the extending portion, and a rod-like member is inserted into the insertion hole. The projecting portions are provided by installing the both end portions so as to project from the end portions of the stator core in the rotor axial direction.

  According to a third aspect of the present invention, in the rotating electrical machine according to the first aspect, the projecting portion is composed of a projecting member joined to both ends of the extending portion in the rotor axial direction.

  According to a fourth aspect of the present invention, in the rotating electrical machine according to any one of the first to third aspects, a part of the plurality of extending portions provided in the stator core includes a mounting bolt for the cover member. An installation hole is provided in the radially outward side portion of the protruding portion.

  According to a fifth aspect of the present invention, in the rotating electric machine according to any one of the first to fourth aspects, the press-inserting member is provided with an auxiliary core that abuts against an end surface in the rotor axial direction of the yoke portion of the stator core. Is.

  According to a sixth aspect of the present invention, in the rotating electrical machine according to any one of the first to fifth aspects, the press-fitting member is integrally provided as a part of a cover member that covers the rotor axial end surface of the stator core. It is what was done.

  According to the first aspect of the present invention, the extending portion provided on the outer peripheral portion of the stator core is provided with a protruding portion parallel to the rotor shaft, and the press-fitting member is pressed into the protruding portion from the radially inner side of the stator core. Therefore, by applying a uniform tensile stress corresponding to the pressure applied to the yoke portion of the stator core through the protruding portion from the press-fitting member, an excellent iron loss reduction effect and magnetic flux density can be obtained. There is an advantage that an increase effect can be obtained.

  The extending portion is formed with an insertion hole substantially parallel to the rotor shaft, and a rod-like member is inserted into the insertion hole, and both ends thereof are installed in a state protruding from the end of the stator core in the rotor axis direction. Thus, the protrusion may be provided (claim 2). In this case, since the rod-shaped member is provided through the extending portion of the stator core made of the laminated electromagnetic steel plates, the rod-shaped member directly from the press-fitting member through the rod-shaped member that is a part thereof. Thus, a uniform tensile stress corresponding to the pressure applied to the yoke portion of the stator core can be applied, and an effect of reducing iron loss and an effect of increasing magnetic flux density can be obtained.

  Further, the projecting portion may be composed of a projecting member joined to both ends of the extending portion in the rotor axial direction (claim 3). In this case, there is no need to provide the rod-like member as in claim 2 and an insertion hole for inserting the rod-like member in the extending portion, the press die for punching the electromagnetic steel sheet can be simplified, and the protruding portion of the rod-like member This is advantageous in terms of cost since it is only necessary to fix the projecting member corresponding to. In this case, the electromagnetic steel sheets are joined by a known caulking process and / or welding of the outer peripheral surface of the yoke, which will be described later, so that the press-fitting member is also pressed into the protrusions in the electromagnetic steel sheets near the center of the stack. The above-described tensile stress can be applied.

  In the invention according to claim 4, the mounting bolt mounting hole for the cover member is provided in a part of the plurality of extending portions provided in the stator core in the radially outward side portion of the protruding portion. The stator core can be fixed to the cover member with a simple configuration by using the above-mentioned extension portion without causing a situation in which the pressure applied to the stator core from the insertion member via the protruding portion is hindered in the fastening portion by the fixing bolt. There is an advantage.

  In the invention according to claim 5, the space (generally a coil is wound around the teeth portion, but the pace corresponding to the coil height) formed at both ends of the stator core in the rotor rotation axis direction is effectively used. By utilizing the auxiliary core, the cross-sectional area of the back yoke portion necessary for flowing a magnetic flux for generating a desired torque in the rotating electrical machine can be effectively increased. There is an advantage that the rotating electrical machine can be downsized by reducing the radial thickness of the portion.

  In the invention according to claim 6, since the press-fitting member that is press-fitted from the radially inner side of the stator core to the protruding portion is integrally provided as a part of the cover member that covers the rotor axial end surface of the stator core, There is an advantage that a uniform tensile stress can be applied to the yoke portion of the stator core without increasing the number of parts, and the assembly work of the rotating electrical machine can be simplified effectively.

It is sectional drawing which shows 1st Embodiment of the rotary electric machine which concerns on this invention. It is sectional drawing which shows the state which decomposed | disassembled the said rotary electric machine. It is the III-III sectional view taken on the line of FIG. It is a top view which shows the specific structure of a stator core. It is a top view which shows the specific structure of a press-insertion member. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is explanatory drawing which shows the action state of the stress in a stator core. It is sectional drawing which shows the modification of a press-insertion member. It is a disassembled sectional view which shows 2nd Embodiment of the rotary electric machine which concerns on this invention. It is sectional drawing which shows the principal part structure of the said rotary electric machine. It is sectional drawing which shows 3rd Embodiment of the rotary electric machine which concerns on this invention. It is sectional drawing which shows 4th Embodiment of the rotary electric machine which concerns on this invention.

  1 to 3 show an embodiment in which a rotating electrical machine according to the present invention is applied to an electric motor used in an electric vehicle. The rotating electrical machine includes a pair of cover members 1 and 2 made of a nonmagnetic material such as an aluminum alloy material or an austenitic SUS material and having a predetermined rigidity, and a stator core (stator) held by the cover members 1 and 2. ) 3, a pair of press-fitting members 4 and 4 for applying a tensile stress to the stator core 3, and a rotor (rotor) rotatably supported by bearings 1 a and 2 a disposed on the cover members 1 and 2. 5. The cover members 1 and 2 are integrally formed with a transmission case or a differential case mounted on the vehicle.

  As shown in FIG. 4, the stator core 3 includes a yoke portion (body portion) 6 formed in an annular shape, and a plurality of teeth portions (tooth portions) 7 protruding from the inner peripheral surface toward the rotation center. The coil (armature winding) 8 is wound around the teeth portion 7. In addition, a long first extending portion 9 and a short second extending portion 10 that extend outward in the radial direction are alternately provided on the outer peripheral portion of the yoke portion 6 at regular intervals. ing. In the present embodiment, eight tooth portions 7 project from the inner peripheral portion of the stator core 3, and the first and second extending portions 9, 10 are provided at outer peripheral portions at positions corresponding to the tooth portions 7. Any one of these is protruded, and the total number thereof and the number of the tooth portions 7 are set to the same number.

  And the insertion hole 12 of the following rod-shaped member 11 is formed in the base end part of the said 1st, 2nd extension parts 9 and 10 along the surrounding surface of the press-insertion member 4, and a long 1st extension. An installation hole 14 for a fixing bolt 13 for fixing the stator core 3 to the cover members 1 and 2 between the cover members 1 and 2 is formed at the tip of the installation portion 9. The rod-shaped member 11 is formed of a member having a predetermined rigidity made of an austenitic SUS material or the like so that the cross-sectional shape is a shape and size corresponding to the insertion hole 12, and the entire length thereof is the rotor axial direction of the stator core 3. It is set to a value larger than the length. The rod-shaped member 11 is inserted into the insertion holes 12 of the first and second extending portions 9 and 10, so that both end portions protrude from the end face of the stator core 3 by a predetermined length L to the stator core 3. It is supposed to be fixed.

  As shown in FIGS. 5 and 6, the press-fitting member 4 includes a circular substrate 15 formed by cutting an aluminum alloy material having a predetermined rigidity, and the thickness direction of the circular substrate 15 from the outer periphery. And a flange portion 16 projecting from the head. The width dimension W of the flange portion 16 is set to a value corresponding to the protruding length L of the rod-shaped member 11. Further, the outer diameter D of the flange portion 16 is 100 μm than the distance d between the inner peripheral surfaces of the opposing rod-like members 11 among the rod-like members 11 fixed to the stator core 3 in a state of protruding from the end face of the stator core 3. It is set to be larger by about 300 μm. Thereby, when the press-inserting member 4 is assembled to the stator core 3 as described later, the flange portion 16 of the press-inserting member 4 is pressed from the radially inner side of the stator core 3 with respect to the protruding portion of the rod-shaped member 11. It is configured to be inserted.

  The circular substrate 15 of the press-fitting member 4 is formed with a rotor shaft insertion hole 17 at the center thereof, and a plurality of radially extending openings 18 are provided around the insertion hole 17. . The opening 18 of the circular substrate 15 is provided to reduce the weight of the rotating electrical machine and to prevent the temperature inside thereof from rising, and the teeth portions 7 and 7 adjacent to the stator core 3 are adjacent to each other. It has a width dimension corresponding to the slot portion formed therebetween. Further, as shown in FIG. 6, the side wall surface 18 a of the opening 18 has a spiral wind F formed so as to smoothly discharge the spiral wind F generated corresponding to the rotational direction K of the rotor 5. It is formed on an inclined surface along the flow direction.

  In order to manufacture the stator core 3, first, a plurality of steel sheets 7 and the first and second extending portions 9 and 10 are formed by punching out a magnetic steel plate having a thickness of about 0.1 to 1.0 mm. A plurality of electromagnetic steel plates 20 each formed of an annular plate are provided on the inner peripheral surface and the outer peripheral surface. Next, each time the magnetic steel sheets 20 are laminated, the electromagnetic steel sheets 20 are positioned so that the positions of the protrusions that become the tooth portions 7 and the first and second extending portions 9 and 10 coincide with each other. Each magnetic steel sheet 20 is caulked and temporarily joined, and its outer peripheral surface part is welded by providing a minute recess such that the minute convex part protrudes toward the back surface at a predetermined position on the surface of the laminated electromagnetic steel sheet 20. Thus, the stator core 3 in which a plurality of electromagnetic steel plates 20 are laminated and integrated in the rotor rotation axis direction is manufactured.

  Then, the coil 8 is wound around the teeth portion 7 of the stator core 3, the rod-like member 11 is inserted into the insertion holes 12 of the first and second extending portions 9, 10, and both end portions thereof are extended from the end surface of the stator core 3. The rod-shaped member 11 is fixed to the stator core 3 in a protruding state. Further, in a state where the rotor 5 is disposed in the stator core 3, the press-fitting member 4 is installed on both end sides in the rotor axial direction, and the flange portion 16 is connected to the protruding portion of the rod-shaped member 11. 3 is inserted from the radially inner side.

  Specifically, the stator core 3 is heated and expanded, or the press-fitting member 4 is cooled and contracted, whereby the outer diameter D of the flange portion 16 is changed to the inner peripheral surface of the opposing rod-shaped member 11. In a state where the distance is smaller than the distance d, the flange portion 16 is disposed between the inner peripheral surfaces of the rod-like members 11 facing each other. Thus, by returning the press-fitting member 4 to the normal temperature in a state where the press-fitting member 4 is assembled to the stator core 3, the flange portion 16 of the press-fitting member 4 is pressed against the protruding portion of the rod-shaped member 11 from the radially inner side of the stator core 3. I will let you.

  As shown in FIG. 7, the flange portion 16 may be mechanically press-fitted into the protruding portion of the rod-shaped member 11. In this case, the flange portion 16 may be formed on the outer surface of the distal end portion of the flange portion 16. The tapered surface 19 is formed so as to facilitate the press-fitting. According to this configuration, the flange portion 16 from the radially inner side of the stator core 3 with respect to the protruding portion of the rod-shaped member 11 without heating and expanding the stator core 3 or cooling and contracting the press-fitting member 4. It is possible to press-fit.

  As described above, the rotor 5 is disposed on the inner side of the annular stator core 3 formed by laminating a plurality of electromagnetic steel plates 20 in the rotor axial direction, and a pair of stator cores 3 are disposed at both ends in the rotor axial direction. With the press-in members 4 and 4 installed, they are disposed between the cover members 1 and 2. Then, the two cover members 1 and 2 are connected to each other via the fixing bolt 13, the stator core 3 is fixed to the cover members 1 and 2, and the rotor 5 is rotatably supported. Can be manufactured easily and appropriately.

  That is, a plurality of extending portions 9 and 10 extending radially outward are provided on the outer peripheral portion of the stator core 3, and through holes 12 that are substantially parallel to the rotor shaft are formed in the extending portions 9 and 10. In addition, since the rod-like member 11 is inserted into the insertion hole 12 and both ends thereof are installed in a state protruding from the end of the stator core 3 in the rotor axial direction, the extension parts 9 and 10 and the insertion hole From the radially inner side of the stator core 3 with respect to the protruding portion of the rod-shaped member 11, without causing a situation in which the flow of magnetic flux generated in the yoke portion 6 of the stator core 3 is obstructed due to the provision of 12. By press-fitting the press-fitting member 4, a uniform pressure P can be applied to the stator core 3 in the direction of increasing its diameter (see FIG. 4).

  In this way, a uniform tensile stress Q in the circumferential direction corresponding to the pressure applied through the press-fitting member 4 and the rod-like member 11 acts on the yoke portion 6 of the stator core 3 as shown in FIG. Therefore, even when the stator core 3 is configured using a non-oriented electrical steel sheet, there is an advantage that an excellent effect of reducing the iron loss and an effect of increasing the magnetic flux density can be obtained.

  In particular, as shown in the above-described embodiment, when the press-fitting member 4 is configured by projecting the flange portion 16 on the outer peripheral portion of the circular substrate 15, the above-described operation can be performed with high accuracy by cutting using a lathe or the like. Since the outer diameter dimension of the flange portion 16 can be set, the stator core is brought into pressure contact with the protruding portion of the rod-shaped member 11 from the radially inner side of the stator core 3 by pressing the flange portion 16 of the press-fitting member 4. The uniform tensile stress in the circumferential direction can be easily and appropriately applied to the three yoke portions 6.

  Moreover, in the said embodiment, while the penetration hole 12 of the said rod-shaped member 11 is formed in the some extension parts 9 and 10 provided in the stator core 3, some of the said extension parts 9 and 10, ie, elongate, are formed. Since the first extending portion 9 is provided with the mounting hole 14 for the fixing bolt 13, the stator core 3 is fixed to the cover members 1 and 2 with a simple configuration using the first extending portion 9. There is an advantage that you can.

  In addition, although it can also be considered as the structure which provided the installation hole 14 of the said fixing bolt 13 in the radial direction inner side part of the insertion hole 12 formed in the said 1st extension part 9, in this case, The pressure applied to the stator core 3 by press-fitting the press-fitting member 4 from the radially inner side of the stator core 3 with respect to the protruding portion of the rod-shaped member 11 is inhibited at the fastening portion by the fixing bolt 13. become. On the other hand, when the installation hole 14 of the fixing bolt 13 is provided on the radially outer side portion of the insertion hole 12 formed in the first extending portion 9 as described above, the press-inserting member There is an advantage that the stator core 3 can be fixed to the cover members 1 and 2 by the fixing bolt 13 without causing a situation in which the pressure applied from 4 to the stator core 3 is obstructed in the fastening portion by the fixing bolt 13.

  9 and 10 show a second embodiment of the rotating electrical machine according to the present invention. In the second embodiment, a concave groove 21 is formed in the flange portion 16 of the press-fitting member 4, and the auxiliary core 22 disposed in the concave groove 21 is formed on the end surface in the rotor axial direction of the yoke portion 6 of the stator core 3. It is comprised so that it may contact | abut. The auxiliary core 22 is formed by laminating the electromagnetic steel plates in the radial direction of the rotor by, for example, winding a belt-shaped body made of electromagnetic steel plates in the circumferential direction of the rotor shaft and fixing the start and end portions thereof by spot welding or the like. In this state, it is configured to be held in the concave groove 21 of the flange portion 16.

  When the auxiliary core 22 that contacts the end surface in the rotor axial direction of the yoke portion 6 of the stator core 3 is provided in the press-inserting member 4 as described above, the coil 8 is wound around the tooth portion 7 of the stator core 3. As a result, the auxiliary core 22 is arranged by effectively using the spaces formed at both ends of the stator core 3 in the rotor rotation axis direction, thereby flowing a magnetic flux for generating a desired torque in the rotating electrical machine. The cross-sectional area of the back yoke portion necessary for the above can be effectively increased. Therefore, there is an advantage that the rotating electric machine can be downsized by reducing the thickness of the back yoke portion in the radial direction.

  FIG. 11 shows a third embodiment of the rotating electrical machine according to the present invention. In the third embodiment, a cylindrical projection 23 that functions as the press-fitting member is integrally provided on the wall surfaces of the cover members 1 and 2 that cover the end surface of the stator core 3 in the axial direction of the rotor. An auxiliary core 22 in which a belt-like body made of an electromagnetic steel plate is wound in the circumferential direction of the rotor shaft is disposed in a concave groove formed in the protrusion 23. In this way, the press-fitting member (projection 23) that is press-fitted from the radially inner side of the stator core 3 with respect to the projecting portion of the rod-shaped member 11 is a part of the cover members 1 and 2 that covers the rotor axial end surface of the stator core 3. According to the structure provided integrally as a part, a uniform tensile stress can be applied to the yoke part 6 of the stator core 3 without increasing the number of parts, and the assembly work of the rotating electrical machine is effectively simplified. There is an advantage that you can.

  FIG. 12 shows a fourth embodiment of the rotating electrical machine according to the present invention. Compared with the first embodiment, the fourth embodiment has a substantially rectangular parallelepiped shape in place of the rod-shaped member 11 in that the insertion holes 12 are not formed in the first and second extending portions 9 and 10. It differs in the point which fixed the protrusion member 31 which consists of a block body to the electromagnetic steel plate 20 of the rotor axial direction both end surface of the 1st, 2nd extending parts 9 and 10. FIG. Since other parts are the same as those in the first embodiment, the description thereof is omitted. The configuration of the fourth embodiment can also be applied to the second and third embodiments.

  The block body serving as the protruding member 31 is made of a non-magnetic material such as an austenitic SUS material, and is positioned and abutted with a jig or the like on the first and second extending portions 9 and 10 of the electromagnetic steel plate 20 at both ends in the rotor axial direction. In this state, the periphery is fixed by welding with the electromagnetic steel plate 20. Since this fixed position is in the extended portions 9 and 10, it is not affected by heat due to welding. In the present embodiment, the projecting member 31 is made of a substantially rectangular parallelepiped block, but instead of this, a box-like or tubular member made of a plate material may be used.

DESCRIPTION OF SYMBOLS 1, 2 Cover member 3 Stator core 4 Press-insertion member 5 Rotor 6 Yoke part 11 Bar-shaped member 12 Insertion hole piece 13 Fixing bolt 14 Installation hole 22 Auxiliary core 31 Projection member

Claims (6)

  A plurality of extending portions extending radially outward are provided on the outer peripheral portion of an annular stator core formed by laminating a plurality of electromagnetic steel plates in the rotor axial direction, and the extending portion has an axial direction of the rotor. And a press-fitting member that is press-fitted from the radially inner side of the stator core to the projecting portion.   The extending portion is formed with an insertion hole substantially parallel to the rotor shaft, and a rod-like member is inserted into the insertion hole, and both ends thereof are installed in a state protruding from the end of the stator core in the rotor axis direction. The rotating electrical machine according to claim 1, wherein the protrusion is provided.   The rotating electrical machine according to claim 1, wherein the protruding portion includes a protruding member joined to both ends of the extending portion in the rotor axial direction.   2. A part of the plurality of extending portions provided in the stator core is provided with a mounting hole for a mounting bolt with respect to a cover member in a radially outward side portion of the projecting portion. 4. The rotating electrical machine according to claim 1.   The rotating electrical machine according to any one of claims 1 to 4, wherein the press-inserting member is provided with an auxiliary core that abuts against a rotor axial end surface of a yoke portion of the stator core.   The rotating electrical machine according to any one of claims 1 to 5, wherein the press-inserting member is integrally provided as a part of a cover member that covers an end surface of the stator core in the rotor axial direction.

Images