JP2016111917A - Rotary electric machine for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine for an internal combustion engine which allows a stator position to be specified in the circumferential direction.SOLUTION: A rotary electric machine 10 for an internal combustion engine comprises: a rotor 21 coupled to a rotation shaft of the internal combustion engine 12; and a stator 31 fixed to a body 13 of the internal combustion engine 12. The stator 31 is coupled and fixed to a boss 13a extending from the body 13. A radial coupling part 71 is provided on a stator core 32 by the fitting between an inner trunk 72a and a projection 73a of the boss 13a. The rotary electric machine 10 further has a circumferential coupling part 81. The circumferential coupling part 81 is arranged further inner side in the radial direction than a radial outer edge of the stator 31. The circumferential coupling part 81 couples the stator core 32 to the body 13 in the circumferential direction of the stator 31. The circumferential coupling part 81 specifies the stator core 32 position in the circumferential direction with respect to the body 13. The circumferential coupling part 81 is provided by the meshing between a cutout part and the projection or provided by a pin.SELECTED DRAWING: Figure 1

Description

  The invention disclosed herein relates to a rotating electrical machine for an internal combustion engine connected to the internal combustion engine.

  Patent Documents 1-4 disclose a rotating electrical machine for an internal combustion engine connected to the internal combustion engine. These rotating electric machines can function as a generator and / or an electric motor (starter). The contents of the prior art documents listed as the prior art are introduced or incorporated by reference as an explanation of the technical elements described in this specification.

  Patent Document 3 and Patent Document 4 are provided with an arm portion that extends radially outward from a member fixed to the stator in order to accurately fix the stator at a predetermined position in the circumferential direction. The arm portion is fixed to the body of the internal combustion engine with a bolt or a pin.

JP2013-27252A JP 2013-233030 A Japanese Patent No. 5097654 Japanese Patent No. 5064279

  In the prior art, in order to define the circumferential position of the stator, a resin arm portion extending outward in the radial direction is required. However, the installation range for rotating electrical machines on internal combustion engines is limited. For this reason, the resin-made arm part may make it difficult to install the rotating electric machine. In the above-mentioned viewpoints or other aspects not mentioned, there is a need for further improvements in rotating electrical machines for internal combustion engines.

  One of the objects of the invention is to provide a rotating electrical machine for an internal combustion engine that can define the position of the stator in the circumferential direction.

  Another object of the invention is to provide a rotating electrical machine for an internal combustion engine that can define the position of the stator in the circumferential direction in a small installation area.

  Another object of the invention is to provide a rotating electrical machine for an internal combustion engine that can define the position of the stator in the circumferential direction within a circular range of the stator.

  The invention disclosed herein employs the following technical means to achieve the above object. Note that the reference numerals in parentheses described in the claims and in this section indicate a corresponding relationship with specific means described in the embodiments described later as one aspect, and limit the technical scope of the invention. Not what you want.

  According to one disclosed invention, a rotating electrical machine for an internal combustion engine is provided. A rotating electrical machine for an internal combustion engine includes a rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotation shaft of the internal combustion engine (12), and an internal combustion engine ( A stator (31) having a stator core (32) which is arranged on the inner side of the rotor by being fixed to the body (13) of 12) and which forms a plurality of magnetic poles (32a) opposed to the permanent magnets on the radially outer side; A circumferential coupling portion (81) that is disposed radially inward from the radially outer edge of the stator and that defines the position of the stator core in the circumferential direction relative to the body by coupling the stator core and the body in the circumferential direction of the stator. It is characterized by that.

  According to this invention, the position in the circumferential direction of the stator core is defined by the circumferential connecting portion. The circumferential direction connection part is arrange | positioned in the radial inside rather than the radial direction outer edge of a stator. Therefore, the circumferential direction connection part is arrange | positioned in the part which becomes a shadow of a stator. Thereby, the position of the stator in the circumferential direction can be defined within the circular range of the stator.

  In one embodiment, the circumferential connecting portion is formed in the axial protruding portion, and the notched portion (83a, 83b, 83c, 87a) that forms the first end surface (84) at the circumferential end of the axial protruding portion. , 87b, 87c, 88), and the inner body so as to protrude radially inward from the cylindrical inner surface, and a second end surface (85) is formed at the end in the circumferential direction. It can have radial protrusions (82a, 82b, 83c, 86a, 86b, 86c, 89) inserted therein.

  In one embodiment, the circumferential connecting portion may have a pin (91) inserted into a body hole (92) provided in the body and a core hole (93, 933) provided in the stator core.

  In one embodiment, the circumferential connecting portion may have a meshing portion that allows the stator core and the body to be connected at a single position in the circumferential direction of the stator.

  In one embodiment, the stator may include a rotational position sensor (43) for outputting a signal for ignition control when the rotor is at a predetermined rotational position.

It is sectional drawing of the rotary electric machine for internal combustion engines which concerns on 1st Embodiment of invention. It is a side view which shows the stator and sensor unit of 1st Embodiment. It is a top view which shows the stator and sensor unit of 1st Embodiment. It is a top view which shows the stator of 1st Embodiment. It is a perspective view which shows the stator of 1st Embodiment. It is a perspective view which shows the boss | hub part of 1st Embodiment. It is a top view which shows the stator of 2nd Embodiment of invention. It is a perspective view which shows the stator of 2nd Embodiment. It is a perspective view which shows the boss | hub part of 2nd Embodiment. It is a top view which shows the stator of 3rd Embodiment of invention. It is a perspective view which shows the stator of 3rd Embodiment. It is a perspective view which shows the boss | hub part of 3rd Embodiment. It is a top view which shows the stator of 4th Embodiment of invention. It is a perspective view which shows the stator of 4th Embodiment. It is a perspective view which shows the boss | hub part of 4th Embodiment. It is a top view which shows the boss | hub part of 5th Embodiment of invention. It is a perspective view which shows the stator of 5th Embodiment. It is a perspective view which shows the stator of 5th Embodiment. It is a top view which shows the stator of 6th Embodiment of invention. It is a perspective view which shows the stator of 6th Embodiment. It is a perspective view which shows the boss | hub part of 6th Embodiment. It is a top view which shows the stator of 7th Embodiment of invention. It is a perspective view which shows the stator of 7th Embodiment. It is a perspective view which shows the boss | hub part of 7th Embodiment. It is sectional drawing of the rotary electric machine for internal combustion engines which concerns on 8th Embodiment of invention. It is a top view which shows the stator and sensor unit of 8th Embodiment. It is a top view which shows the stator and sensor unit of 9th Embodiment of invention. It is an expanded sectional view showing a pin and a hole of an 8th embodiment.

  A plurality of modes for carrying out the invention disclosed herein will be described with reference to the drawings. In each embodiment, portions corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals and redundant description may be omitted. Further, in the following embodiments, the correspondence corresponding to the matters corresponding to the matters described in the preceding embodiments is indicated by adding reference numerals that differ only by one hundred or more, and redundant description may be omitted. . In each embodiment, when only a part of the structure is described, the other parts of the structure can be applied with reference to the description of the other forms.

(First embodiment)
(First embodiment)
In FIG. 1, a rotating electrical machine for an internal combustion engine (hereinafter simply referred to as a rotating electrical machine) 10 is also called a generator motor or an AC generator starter. The rotating electrical machine 10 is electrically connected to an electric circuit 11 including an inverter circuit (INV) and a control device (ECU). The electric circuit 11 provides a three-phase power conversion circuit. An example of the use of the rotating electrical machine 10 is a generator motor of an internal combustion engine 12 for a vehicle. The rotating electrical machine 10 can be used for a motorcycle, for example.

  When the rotating electrical machine 10 functions as a generator, the electric circuit 11 provides a rectifier circuit that rectifies the AC power output and supplies the electric load including the battery. The electric circuit 11 provides a signal processing circuit that receives a reference position signal for ignition control supplied from the rotating electrical machine 10. The electric circuit 11 may provide an ignition controller that performs ignition control. The electric circuit 11 provides a drive circuit that causes the rotating electrical machine 10 to function as an electric motor. The electrical circuit 11 receives from the rotating electrical machine 10 a rotational position signal for causing the rotating electrical machine 10 to function as an electric motor. The electrical circuit 11 causes the rotating electrical machine 10 to function as an electric motor by controlling energization to the rotating electrical machine 10 according to the detected rotational position.

  The rotating electrical machine 10 is assembled to the internal combustion engine 12. The internal combustion engine 12 includes a body 13 and a rotary shaft 14 that is rotatably supported by the body 13 and rotates in conjunction with the internal combustion engine 12. The rotating electrical machine 10 is assembled to the body 13 and the rotating shaft 14. The body 13 is a structure such as a crankcase or a transmission case of the internal combustion engine 12. The rotating shaft 14 is a crankshaft of the internal combustion engine 12 or a rotating shaft interlocking with the crankshaft. The rotating shaft 14 rotates when the internal combustion engine 12 is operated, and drives the rotating electrical machine 10 to function as a generator. The rotating shaft 14 is a rotating shaft that can start the internal combustion engine 12 by the rotation of the rotating electrical machine 10 when the rotating electrical machine 10 functions as an electric motor. The rotating shaft 14 is a rotating shaft that can assist (assist) the rotation of the internal combustion engine 12 by the rotation of the rotating electrical machine 10 when the rotating electrical machine 10 functions as an electric motor.

  The rotating electrical machine 10 includes a rotor 21, a stator 31, and a sensor unit 41. The rotor 21 is a field element. The stator 31 is an armature. The sensor unit 41 is a rotational position detector.

  The entire rotor 21 is cup-shaped. The rotor 21 is positioned with its open end facing the body 13. The rotor 21 is fixed to the end of the rotating shaft 14. The rotor 21 and the rotating shaft 14 are connected via a positioning mechanism in the rotational direction such as key fitting. The rotor 21 is fixed by being fastened to the rotary shaft 14 by a fixing bolt 25. The rotor 21 rotates together with the rotating shaft 14. The rotor 21 provides a field by a permanent magnet.

  The rotor 21 has a cup-shaped rotor core 22. The rotor core 22 is connected to the rotating shaft 14 of the internal combustion engine 12. The rotor core 22 has an inner cylinder fixed to the rotating shaft 14, an outer cylinder positioned on the radially outer side of the inner cylinder, and an annular bottom plate extending between the inner cylinder and the outer cylinder. The rotor core 22 provides a yoke for a permanent magnet described later. The rotor core 22 is made of a magnetic metal.

  The rotor 21 has a permanent magnet 23 disposed on the inner surface of the rotor core 22. The permanent magnet 23 is fixed inside the outer cylinder. The permanent magnet 23 has a plurality of segments. Each segment is partially cylindrical. The permanent magnet 23 provides a plurality of N poles and a plurality of S poles inside thereof. The permanent magnet 23 provides at least a field. The permanent magnet 23 provides six pairs of N poles and S poles, that is, a 12 pole field by 12 segments. The permanent magnet 23 also provides a partial special magnetic pole for providing a reference position signal for ignition control. The special magnetic pole is provided by a partial magnetic pole different from the magnetic pole arrangement for the field. The permanent magnet 23 is fixed with respect to the axial direction and the radial direction by a holding cup 24 arranged on the radially inner side. The holding cup 24 is made of a thin nonmagnetic metal. The holding cup 24 is fixed to the rotor core 22.

  FIG. 2 shows the radially outer side of the stator 31. FIG. 3 is a partial plan view including the stator 31 and the sensor unit 41. In FIG. 3, the cross-sectional position of FIG. 1 is indicated by the line II. The stator 31 and the sensor unit 41 can be understood in detail with reference to FIGS.

  The stator 31 is an annular member. The stator 31 is disposed between the rotor 21 and the body 13. The stator 31 has a through hole that can receive the rotating shaft 14 and the inner cylinder of the rotor core 22. The stator 31 has an outer peripheral surface that faces the inner surface of the rotor 21 via a gap. A plurality of magnetic poles 32a are arranged on the outer peripheral surface. These magnetic poles 32 a are arranged to face the field of the rotor 21. The stator 31 has an armature winding. The stator 31 has multiphase armature windings. The stator 31 is fixed to the body 13. The stator 31 is a three-phase multipolar stator having a plurality of magnetic poles 32a and a plurality of three-phase windings.

  The stator 31 has a stator core 32. The stator core 32 is disposed inside the rotor 21 by being fixed to the body 13 of the internal combustion engine 12. The stator core 32 forms a plurality of magnetic poles 32a facing the permanent magnet 23 on the radially outer side. The stator core 32 is formed by laminating electromagnetic steel plates formed in a predetermined shape so as to form a plurality of magnetic poles 32a. The stator core 32 provides a plurality of magnetic poles 32 a that face the inner surface of the permanent magnet 23. A gap 32 b is provided between the plurality of magnetic poles 32 a of the stator core 32.

  The stator 31 has a stator coil 33 wound around a stator core 32. The stator coil 33 provides an armature winding. An insulator made of an insulating material is disposed between the stator core 32 and the stator coil 33. The stator coil 33 is a three-phase winding. The stator coil 33 can selectively function the rotor 21 and the stator 31 as a generator or an electric motor.

  The stator 31 and the body 13 are connected via a fixing bolt 34. The stator 31 is fixed by being fastened to the body 13 by a plurality of fixing bolts 34. The stator 31 is fixed to a boss portion 13 a extending from the body 13. The boss part 13a is a cylindrical part. The boss portion 13 a is a metal member that is integral with the body 13.

  As shown in FIG. 3, the stator core 32 defines a through hole 32 c for receiving the inner shaft of the rotating shaft 14 and the rotor core 22. Further, the stator core 32 has a plurality of through holes 32 d for receiving a plurality of fixing bolts 34. These through holes 32d contribute to defining the position of the stator core 32 in the circumferential direction. However, the gap between the through hole 32d and the fixing bolt 34 is larger than the circumferential position accuracy required for the stator 31. Further, the stator core 32 has a through hole for receiving a fixing bolt 44 for fixing the sensor unit 41.

  The sensor unit 41 is fixed to the stator 31. The sensor unit 41 is disposed between the stator core 32 and the body 13. The sensor unit 41 is fixed to one end surface of the stator core 32. The sensor unit 41 detects the rotational position of the rotor 21 by detecting the magnetic flux supplied by the permanent magnet 23 provided on the rotor 21. The sensor unit 41 has a plurality of rotational position sensors 43. The plurality of rotational position sensors 43 are disposed between the two adjacent magnetic poles 32 a and detect the rotational position of the rotor 21 by detecting the magnetic flux of the permanent magnet 23. The plurality of rotational position sensors 43 are disposed away from each other in the circumferential direction with respect to the rotational axis of the rotor 21.

  The reference position for ignition control is indicated by the position of the special magnetic pole provided by the permanent magnet 23. The rotational position of the rotor 21 is also the rotational position of the rotating shaft 14. Therefore, a reference position signal for ignition control can be obtained by detecting the rotational position of the rotor 21. At least one of the plurality of rotational position sensors 43 outputs a signal for ignition control by reacting to the special magnetic pole. In this embodiment, one rotational position sensor 43 provides a rotational position sensor for ignition control. As a result, the stator 31 includes a rotational position sensor for outputting a signal for ignition control when the rotor 21 is at a predetermined rotational position.

  The rotational position of the rotor 21 is indicated by the position in the rotational direction of the field provided by the permanent magnet 23. Therefore, the rotating electrical machine 10 can function as an electric motor by detecting the rotational position of the rotor 21 and controlling the energization to the armature winding according to the detected rotational position. At least one of the plurality of rotational position sensors 43 detects the rotational position of the rotor 21 for causing the rotating electrical machine 10 to function as at least an electric motor. The rotating electrical machine 10 can function as a generator and an electric motor, and can selectively function as either of them.

  The sensor unit 41 accommodates the circuit component 42. The circuit component 42 includes a substrate, an electric element mounted on the substrate, and an electric wire. The sensor unit 41 accommodates the rotational position sensor 43. The sensor unit 41 has a case 51.

  The case 51 is made of a resin material. The case 51 can partially have a metal part. The case 51 accommodates and holds the circuit component 42 and the rotational position sensor 43. The rotational position sensor 43 is connected to the circuit component 42. The case 51 has a shape corresponding to a cross section of a polygonal cylinder, for example, a trapezoidal cylinder, and has an outer edge extending approximately corresponding to the radially outer edge of the stator 31. The case 51 has a container 52 for housing the circuit component 42. The container 52 is made of a resin material. The container 52 has a box shape in which a surface facing the body 13 is opened. The container 52 has a bottom surface facing the stator core 32 side, an opening facing the body 13, and a side wall surrounding the bottom surface and the opening. The circuit component 42 is accommodated in the container 52 and fixed.

  The case 51 has at least one cover 53 for accommodating and supporting at least one rotational position sensor 43. The rotational position sensor 43 is fixed in the cover 53. The cover 53 is a bottomed cylindrical member formed so as to extend from the bottom surface of the container 52. The cover 53 is provided on the radially outer side. The cover 53 is inserted into the gap 32b between the two magnetic poles 32a. The cover 53 is integrally formed to be continuous from the container 52 with the same resin material as the container 52.

  The cover 53 includes a base portion 53a provided on the bottom surface of the case 51, and a distal end portion 53b extending from the base portion 53a. The tip 53b is thinner than the base 53a. The base 53a has a width wider than the gap 32b. A stepped portion 53c is formed between the base portion 53a and the distal end portion 53b. The step portion 53 c comes into contact with the end surface of the stator core 32. Thereby, the insertion amount of the front-end | tip part 53b in the clearance gap 32b is prescribed | regulated.

  The inside of the cover 53 communicates with the inside of the container 52. The sensor unit 41 has a plurality of covers 53. The cover 53 has a shape that can be called a finger shape or a tongue shape extending from the container 52. The cover 53 can also be called a sheath for the rotational position sensor 43. The plurality of covers 53 include one cover 53 for a rotational position sensor for detecting a reference position for ignition control and three covers 53 for rotational position sensors for motor control.

  One rotational position sensor 43 is accommodated in each cover 53. The rotational position sensor 43 detects the magnetic flux supplied from the permanent magnet 23. The rotational position sensor 43 is provided by a Hall sensor, an MRE sensor, or the like. This embodiment has one rotational position sensor for ignition control and three rotational position sensors for motor control. The rotational position sensor 43 is electrically connected to the circuit component 42 by a sensor terminal disposed in a cavity in the cover 53.

  Details relating to the permanent magnet 23 for ignition control and motor control in this embodiment and details relating to the plurality of rotational position sensors 43 are disclosed in Japanese Patent Laid-Open Nos. 2013-233030 and 2013. The contents described in JP-A No. 27272 or Japanese Patent No. 5064279 can be incorporated, and the contents of the description are cited by reference.

  The case 51 has a tightening portion 54. The tightening portion 54 is provided radially inward from the container 52 with respect to the radial direction of the rotating electrical machine 10. A connecting portion 55 is provided between the container 52 and the tightening portion 54 to connect them. The fastening portion 54 and the connecting portion 55 are integrally formed so as to be continuous from the container 52 by the same resin material as that of the container 52. The fixing bolt 44 is disposed through the stator core 32 from the surface of the stator core 32 opposite to the body 13. The front end portion of the fixing bolt 44 protruding from the stator core 32 is screwed into the female thread portion of the tightening portion 54. Thereby, the sensor unit 41 is fixed to the stator core 32. The inside of the container 52 is filled with a protective sealing resin 56. The sealing resin 56 is a potting resin for protecting the circuit component 42.

  The case 51 has leg portions 61. The leg portion 61 is elastically deformed when the stator 31 is fixed to the body 13. Thereby, the sensor unit 41 is pressed toward the stator 31. In addition, when the position of the case 51 is stabilized without the leg part 61, or when it has a part replaced with the leg part 61, the structure which is not provided with the leg part 61 is also employable.

  The sensor unit 41 has a lead wire for external connection for taking out a signal output from the rotational position sensor 43 to the outside. The sensor unit 41 has a plurality of lead wires for taking out signals from the plurality of rotational position sensors 43. The rotating electrical machine 10 includes a plurality of power lines that connect the stator coil 33 and the electric circuit 11. The electric power line supplies the electric circuit 11 with electric power induced in the stator coil 33 when the rotating electrical machine 10 functions as a generator. The power line supplies power for exciting the stator coil 33 from the electric circuit 11 to the stator coil 33 when the rotating electrical machine 10 functions as an electric motor. The lead wire and the power wire are formed and laid as a wire bundle 11a. The wire bundle 11a is laid so as to extend from the stator 31 in the radial direction.

  As illustrated in FIGS. 1 and 3, the stator core 32 is fixed on the tip surface of the boss portion 13 a. The boss portion 13 a has a receiving surface 13 b that is in contact with the stator core 32 in the axial direction and receives the stator core 32 at the tip thereof. FIG. 3 shows the outer shape of the boss portion 13a and the range of the receiving surface 13b. The receiving surface 13b extends around the through hole 32d. Furthermore, the receiving surface 13b extends annularly around the through hole 32c. The receiving surface 13b may be partially provided around the bolt hole 13c for receiving the fixing bolt 34. The receiving surface 13b is arranged so that the stator core 32 can be stably received.

  Between the boss portion 13a and the stator core 32, a radial connecting portion 71 for defining the position of the stator core 32 in the radial direction is formed. The radial connecting portion 71 is provided by fitting the boss portion 13 a and the stator core 32. The radial direction connection part 71 can also be called a fitting part. The radial direction connecting portion 71 is provided by inserting a part of the boss portion 13 a into the stator core 32 along the axial direction. The radial connecting portion 71 is also called a mark brazing joint. The radial connecting portion 71 is disposed radially inward from the radial outer edge of the stator 31. The radial connecting portion 71 defines the position of the stator core 32 in the radial direction by connecting the stator core 32 and the body 13 with respect to the radial direction of the stator 31.

  The radial direction connecting portion 71 has an inner trunk portion 72 a formed in the stator core 32. The inner trunk portion 72a extends partially along the circumferential direction. The inner body 72a provides a partial cylindrical inner surface. The inner trunk portion 72a is a part of the through hole 32c. The inner trunk portion 72 a provides a cylindrical inner surface for defining the radial position of the stator 31. The inner trunk portion 72a is also referred to as an axial concave portion that receives a protrusion 73a described later.

  The radial direction connection part 71 has the protrusion part 73a. The protrusion 73a is a partial cylindrical portion that extends in the axial direction from the boss 13a. The protrusion 73a can be inserted inside the inner trunk 72a. The protrusion 73a provides a partially cylindrical outer surface of the cylinder. The protrusion 73 a provides a cylindrical outer surface for defining the radial position of the stator 31. The protrusion 73a is also called an axial protrusion.

  Between the boss | hub part 13a and the stator core 32, the circumferential direction connection part 81 for prescribing | regulating the position of the stator core 32 regarding the circumferential direction is formed. The position of the stator core 32 in the circumferential direction is also referred to as the angular position of the stator core 32. The circumferential connecting portion 81 is provided by fitting the boss portion 13 a and the stator core 32. The circumferential connecting portion 81 is provided by directly engaging the stator core 32 and the body 13 at the concave portion and the convex portion. The circumferential direction connection part 81 can also be called a fitting part. The circumferential direction connecting part 81 is formed by positioning a part of the boss part 13a and a part of the stator core 32 so as to mesh with each other in the circumferential direction. The circumferential direction connection part 81 is also called a meshing part. The circumferential connecting portion 81 is disposed radially inward from the radially outer edge of the stator 31. The circumferential coupling portion 81 defines the position of the stator core 32 in the circumferential direction with respect to the body 13 by coupling the stator core 32 and the body 13 in the circumferential direction of the stator 31.

  The circumferential connecting portion 81 has a protruding portion 82 a formed on the stator core 32. The protruding portion 82a is formed so as to protrude inward in the radial direction from the cylindrical portion 72. The protrusion 82a occupies a range where the cylindrical portion 72 is not provided in the circumferential direction. The protrusion 82a has end faces 84 on both sides in the circumferential direction. The end face 84 faces the circumferential direction. The protrusion 82a is a part of the through hole 32c. The protrusion 82a is also called a radial protrusion.

  The circumferential direction connection part 81 has the notch part 83a formed in the boss | hub part 13a. By forming the notch 83a, the protrusion 73a provides an end face 85 facing the notch 83a. The end face 85 defines the circumferential end of the notch 83a. The notch 83a is formed at a position corresponding to the protrusion 82a. The notch 83a is formed over an angular range corresponding to the protrusion 82a. The formation range of the notch 83a is slightly larger than the formation range of the protrusion 82a in order to receive the protrusion 82a. The notch 83a is also called a radial recess that receives the protrusion 82a.

  In this embodiment, the stator core 32 has a through hole 32 d formed in the stator core 32. The through hole 32 d receives a fixing bolt 34 for fixing the stator 31 to the body 13. The fixing bolt 34 and the through hole 32d contribute to defining the circumferential position of the stator 31. The movable angle of the stator core 32 in the circumferential direction allowed by the circumferential connecting portion 81 is smaller than the movable angle of the stator core 32 allowed by the fixing bolt 34 and the through hole 32d. Therefore, the circumferential connecting portion 81 improves the positional accuracy of the stator 31 in the circumferential direction, that is, the angular accuracy.

  FIG. 4 is a plan view of the stator 31. FIG. 5 is a perspective view of the stator 31. In the drawing, a part of the wire bundle 11a is shown. The wire bundle 11a is fixed to the stator core 32 by a holder 11b. In the figure, a terminal block 11c for connecting the stator coil 33 is shown.

  The protrusion 82a is provided at a position corresponding to the notch 83a. The protruding portion 82a is provided at a position other than the range where the sensor unit 41 indicated by the broken line is arranged. The sensor unit 41 is disposed between a pair of adjacent through holes 32d among the three through holes 32d. The protrusion 82a is disposed between the other set of through holes 32d. This arrangement contributes to suppression of interference between the sensor unit 41 and the boss portion 13a.

  FIG. 6 is a perspective view of the boss portion 13a. The protrusion 73 a provides an inner cylinder that is inserted inside the stator core 32. The notch 83a is formed in a part of the protrusion 73a. The end surface 85 is a circumferential end surface of the protruding portion 73a, and defines the notch portion 83a.

  The circumferential length of the inner trunk portion 72a is longer than the circumferential length of the protruding portion 82a. The inner body portion 72 a and the projecting portion 82 a are disposed asymmetrically with respect to the center of the stator core 32. The circumferential length of the protrusion 73a is longer than the circumferential length of the notch 83a. The protrusion 73a and the notch 83a are disposed asymmetrically with respect to the center of the boss 13a. The notch 83 a that provides the circumferential connecting portion 81 and the radial protrusion 82 a are disposed asymmetrically with respect to the center of the stator 31. The circumferential connecting portion 81 limits the position where the protruding portion 82a and the cutout portion 83a can mesh with each other in the circumferential direction. Therefore, the circumferential connecting portion 81 provides a meshing portion that allows the stator core 32 and the body 13 to be connected at a single position in the circumferential direction of the stator 31.

  Returning to FIG. 1 and FIG. 3, the protrusion 73 a can be inserted into the inner body 72 a. A minute gap is formed between the cylindrical inner surface of the inner trunk portion 72a and the cylindrical outer surface of the protruding portion 73a. The cylindrical inner surface and the cylindrical outer surface are spread continuously or intermittently along the circumferential direction so as to define the radial position of the stator core 32. In the illustrated example, the cylindrical inner surface and the cylindrical outer surface extend beyond an angular range of 180 degrees. The cylindrical inner surface and the cylindrical outer surface extend over an angle of approximately 270 degrees. The position in the radial direction of the stator core 32 on the boss portion 13a is defined by the cylindrical inner surface and the cylindrical outer surface.

  The protruding portion 82a can be inserted inside the opening that the notch 83a defines in the circumferential direction. The protrusion 82a is inserted into the notch 83a along the axial direction when the protrusion 73a is inserted into the inner body 72a along the axial direction. A minute gap is formed between the end surface 84 of the protrusion 82a and the end surface 85 of the notch 83a. The end surface 84 and the end surface 85 define a position in the circumferential direction of the stator core 32 on the boss portion 13a.

  According to the embodiment described above, both the radial position and the circumferential position of the stator 31 are defined by the direct engagement between the stator core 32 and the boss portion 13a, that is, the body 13. For this reason, both the radial direction position and the circumferential direction position are accurately defined within the installation range for the stator 31. Moreover, both the radial position and the circumferential position are defined without requiring a resin member extending radially outward from the sensor unit 41. The stator 31 can be accurately fixed at a predetermined position on the body 13. Thereby, various malfunctions resulting from the position error of the stator 31 are suppressed. One of the advantageous effects is an improvement in ignition control accuracy because the position of the rotational position sensor 43 for ignition control in the circumferential direction is accurately positioned at a specified position on the body 13.

(Second Embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the circumferential connecting portion 81 is provided by one protrusion 82a and one notch 83a. It can replace with this and the circumferential direction connection part 81 can be provided with a some protrusion part and a notch part.

  7 and 8, the stator core 32 has two inner body portions 72a and 72b and two projecting portions 82a and 82b. The protrusions 82 a and 82 b provide four end surfaces including the end surface 84. The protrusions 82a and 82b are provided at positions other than the range where the sensor unit 41 indicated by the broken line is arranged.

  In FIG. 9, the boss portion 13a has two protrusions 73a and 73b and two notches 83a and 83b. The two protrusions 73a and 73b are formed and arranged so as to define a series of cylindrical outer surfaces. The two protrusions 73 a and 73 b provide an inner cylinder for the radial connecting portion 71. The notches 83a and 83b are formed between the protrusions 73a and 73b so as to divide them. By providing the notches 83 a and 83 b, the protrusions 73 a and 73 b provide four end surfaces including the end surface 85. The notches 83a and 83b are provided at positions corresponding to the protrusions 82a and 82b.

  The radial connecting portion 71 is provided by a cylindrical inner surface defined by the two inner body portions 72a and 72b and a cylindrical outer surface defined by the two projecting portions 73a and 73b. The circumferential connecting portion 81 is provided by an end face 84 defined by the two protrusions 82a and 82b and an end face 85 formed on the two protrusions 73a and 73b by the two notches 83a and 83b.

  The circumferential length of the inner barrel portion 72a is different from the circumferential length of the inner barrel portion 72b. The circumferential length of the inner barrel portion 72a is longer than the circumferential length of the inner barrel portion 72b. The circumferential length of the protruding portion 82a is different from the circumferential length of the protruding portion 82b. The circumferential length of the protrusion 82b is longer than the circumferential length of the protrusion 82a. The inner body portions 72 a and 72 b and the projecting portions 82 a and 82 b are disposed asymmetrically with respect to the center of the stator core 32. The circumferential length of the protrusion 73a is different from the circumferential length of the protrusion 73b. The circumferential length of the protrusion 73a is longer than the circumferential length of the protrusion 73b. The circumferential length of the notch 83a is different from the circumferential length of the notch 83b. The circumferential length of the notch 83b is longer than the circumferential length of the notch 83a. The protrusions 73a and 73b and the notches 83a and 83b are disposed asymmetrically with respect to the center of the boss portion 13a. The circumferential connecting portion 81 limits the positions where the projecting portions 82a and 82b and the cutout portions 83a and 83b can mesh with each other in the circumferential direction.

  Also in this embodiment, the same effect as the preceding embodiment can be obtained. Further, the inner trunk portions 72a and 72b are arranged in a distributed manner in the circumferential direction. Thereby, the radial position of the stator 31 is stably defined. Moreover, since the protrusion parts 73a and 73b and the protrusion parts 82a and 82b provide the some end surface 84 and 85, the contact part regarding the circumferential direction is disperse | distributed. Thereby, the position in the circumferential direction is stably defined.

(Third embodiment)
This embodiment is a modification based on the preceding embodiment.

  10 and 11, the stator core 32 has three inner body portions 72a, 72b, 72c and three protrusions 82a, 82b, 82c. The protrusions 82 a, 82 b, 82 c provide six end surfaces including the end surface 84.

  In FIG. 12, the boss 13a has three protrusions 73a, 73b, 73c and three notches 83a, 83b, 83c. The three protrusions 73a, 73b, 73c are formed and arranged so as to define a series of cylindrical outer surfaces. By providing the notches 83a, 83b, and 83c, the protrusions 73a, 73b, and 73c provide six end surfaces including the end surface 85. The notches 83a, 83b, 83c are provided at positions corresponding to the protrusions 82a, 82b, 82c.

  The radial connecting portion 71 is provided by a cylindrical inner surface defined by the three inner body portions 72a, 72b, 72c and a cylindrical outer surface defined by the three projecting portions 73a, 73b, 73c. The circumferential connecting portion 81 includes an end face 84 defined by the three protrusions 82a, 82b, and 82c, and an end face 85 that is formed on the three protrusions 73a, 73b, and 73c by the three notches 83a, 83b, and 83c. Provided.

  The circumferential length of one of the three inner body portions 72a, 72b, 72c is different from the remaining two circumferential lengths. The three protrusions 82a, 82b, 82c have the same circumferential length. The inner body portions 72 a, 72 b, 72 c and the projecting portions 82 a, 82 b, 82 c are disposed asymmetrically with respect to the center of the stator core 32. The circumferential length of one of the three protrusions 73a, 73b, 73c is different from the remaining two circumferential lengths. The three cutouts 83a, 83b, 83c have the same circumferential length. The protrusions 73a, 73b, 73c and the notches 83a, 83b, 83c are asymmetrically arranged with respect to the center of the boss 13a. The circumferential connecting portion 81 limits the positions where the protrusions 82a, 82b, and 82c can engage with the notches 83a, 83b, and 83c to the only position in the circumferential direction.

  Also in this embodiment, the same effect as the preceding embodiment can be obtained. Further, the inner body portions 72a, 72b, 72c are arranged in a distributed manner in the circumferential direction. Thereby, the radial position of the stator 31 is stably defined. Moreover, since the protrusions 73a, 73b, and 73c and the protrusions 82a, 82b, and 82c provide a plurality of end surfaces 84 and 85, contact portions in the circumferential direction are dispersed. Thereby, the position in the circumferential direction is stably defined.

(Fourth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the inner body portions 72a, 72b, 72c and the protruding portions 82a, 82b, 82c are formed over the entire axial length of the through hole 32c of the stator core 32. Instead, the inner body portion and the protruding portion can be formed only in a part of the through hole 32c in the axial direction, in particular, only at the corner portion.

  13 and 14, the stator core 32 has an inner trunk portion 74a. The inner body portion 74 a is provided by a shallow groove formed at the end of the through hole 32 c of the stator core 32. The stator core 32 has a protrusion 86a. The protruding portion 86a is provided by an island portion that is left without forming a groove. The stator core 32 is formed by laminating a plurality of silicon steel plates. The grooves are formed in some silicon steel plates. The groove can be formed in the end plate when an end plate is provided at the end of the stator core 32. The inner body 74a provided by the groove provides a cylindrical inner surface. The protrusion 86 a provided by the island provides an end face 84.

  In FIG. 15, the boss portion 13a has a protruding portion 75a and a notch portion 87a. The protrusion 75a provides a series of cylindrical outer surfaces. The protruding portion 75a can be inserted into a groove that provides the inner trunk portion 74a. By providing the notch portion 87a, the projecting portion 75a provides the end face 85. The notch 87a is provided at a position corresponding to the protrusion 86a.

  The inner body portion 74a corresponds to the inner body portion 72a of the preceding embodiment. The protrusion 86a corresponds to the protrusion 82a of the preceding embodiment. The protrusion 75a corresponds to the protrusion 73a of the preceding embodiment. The notch 87a corresponds to the notch 83a of the preceding embodiment.

  Also in this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, since the relatively thick protrusion 75a can be provided, high strength can be obtained. Further, since the inner body portion 74a and the protruding portion 86a are provided by the grooves formed in the stator core 32, the radial direction connecting portion 71 and the circumferential direction connecting portion 81 are provided without requiring the large through hole 32c. Can do.

(Fifth embodiment)
This embodiment is a modification based on the preceding embodiment. 16 and 17, the stator core 32 has two inner body portions 74a and 74b and two projecting portions 86a and 86b. In FIG. 18, the boss 13a has two projecting portions 75a and 75b and two notches 87a and 87b. The inner body parts 74a and 74b correspond to the inner body parts 72a and 72b of the preceding embodiment. The protrusions 86a and 86b correspond to the protrusions 82a and 82b of the preceding embodiment. The protrusions 75a and 75b correspond to the protrusions 73a and 73b of the preceding embodiment. The notches 87a and 87b correspond to the notches 83a and 83b in the preceding embodiment. Also in this embodiment, the same effect as the preceding embodiment can be obtained.

(Sixth embodiment)
This embodiment is a modification based on the preceding embodiment. 19 and 20, the stator core 32 has three inner body portions 74a, 74b, and 74c and three protrusion portions 86a, 86b, and 86c. In FIG. 21, the boss 13a has three protrusions 75a, 75b, and 75c, and three notches 87a, 87b, and 87c.

  The inner body parts 74a, 74b, and 74c correspond to the inner body parts 72a, 72b, and 72c of the preceding embodiment. The protrusions 86a, 86b, 86c correspond to the protrusions 82a, 82b, 82c of the preceding embodiment. The protrusions 75a, 75b, and 75c correspond to the protrusions 73a, 73b, and 73c of the preceding embodiment. The notches 87a, 87b, 87c correspond to the notches 83a, 83b, 83c of the preceding embodiment. Also in this embodiment, the same effect as the preceding embodiment can be obtained.

(Seventh embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the stator core 32 provides a cylindrical inner surface, and the boss portion 13a provides a cylindrical outer surface. Alternatively, the stator core 32 may provide a cylindrical outer surface, and the boss portion 13a may provide a cylindrical inner surface.

  22 and 23, the stator core 32 has a protrusion 76. The protruding portion 76 extends in a partial cylindrical shape from the end plate provided at the end of the stator core 32 in the axial direction. The protrusion 76 provides a cylindrical outer surface on the outer peripheral surface thereof. The stator core 32 has a notch 88. The notch 88 is formed so as to divide the protrusion 76. By providing the notch 88, the protrusion 76 provides an end face 84 at its end. The notch 88 is partitioned by the end face 84.

  In FIG. 24, the boss portion 13 a has an inner trunk portion 77. The inner trunk portion 77 is provided by a groove formed in the boss portion 13a. The groove is recessed from the receiving surface 13b. By forming the inner trunk portion 77, the boss portion 13a provides a cylindrical inner surface. In the figure, a cylindrical inner surface is provided on the inner side of the columnar portion in which the bolt hole 13c is formed. The boss portion 13 a has a protruding portion 89. The protruding portion 89 is provided by an island portion that is left without forming a groove. The protrusion 89 provides an end face 85. The protrusion 89 is provided at a position corresponding to the notch 88.

  In this embodiment, the radial connecting portion 71 is provided by the cylindrical outer surface of the protruding portion 76 and the cylindrical inner surface of the inner trunk portion 77. The circumferential connecting portion 81 is provided by an end surface 84 formed on the projecting portion 76 by forming the notch 88 and an end surface 85 formed on the projecting portion 89.

  Also in this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, the radial direction connection part 71 and the circumferential direction connection part 81 can be provided by an end plate. In this embodiment, a plurality of protrusions 76, a plurality of inner body portions 77, a plurality of notches 88, and a plurality of protrusions 89 may be provided as in the preceding embodiments.

(Eighth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, both the radial direction connecting portion 71 and the circumferential direction connecting portion 81 are provided by direct fitting of the stator core 32 and the body 13. Instead of this, at least the circumferential connecting portion 81 may be formed via a metal connecting member.

  FIG. 25 shows a cross-sectional view of the rotating electrical machine. FIG. 26 is a partial plan view including the stator 31 and the sensor unit 41. In FIG. 26, the cross-sectional position of FIG. 25 is indicated by the line XXV-XXV.

  The radial direction connection part 71 is formed by the inner trunk | drum 72a and the protrusion part 73a. The circumferential connecting portion 81 is formed by a metal pin 91. The pin 91 is called a knock pin or a stud pin. The pin 91 is a round bar. The pin 91 is fixed to a body hole 92 that is a pin hole provided in the boss portion 13 a of the body 13. The pin 91 is press-fitted into the body hole 92. The pin 91 can be inserted into a core hole 93 that is a pin hole formed in the stator core 32. The core hole 93 is provided at a site other than the range where the sensor unit 41 is disposed. The gap between the pin 91 and the core hole 93 is extremely small. The circumferential connecting portion 81 by the pin 91 defines the circumferential position of the stator 31 with higher accuracy than the circumferential position defined by the fixing bolt 34 and the through hole 32d.

  The body hole 92 is formed in the receiving surface 13b. In order to form the body hole 92, the boss 13a has an additional raised portion adjacent to the raised portion for forming the bolt hole 13c. The body hole 92 and the pin 91 are provided at positions opposite to the sensor unit 41 on the stator 31 in the diameter direction.

  As illustrated in FIG. 25, the body hole 92 and the core hole 93 are non-through holes having a bottom in the axial direction of the stator 31. The pin 91 extends from the receiving surface 13b. The pin 91 extends from the receiving surface 13 b higher than the protruding portion 73 a for the radial connecting portion 71. In other words, the protruding length of the pin 91 is longer than the protruding length of the protruding portion 73 a for the radial direction connecting portion 71. Thereby, it is avoided that only the radial direction connection part 71 will be in a fitting state in the state which the pin 91 is not inserted in the core hole 93. FIG. Therefore, both the radial direction connection part 71 and the circumferential direction connection part 81 can be made into a fitting state reliably.

  The circumferential connecting portion 81 of this embodiment has a pin 91 inserted into a body hole 92 provided in the body 13 and a core hole 93 provided in the stator core 32. Also in this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, the circumferential direction connection part 81 can be arrange | positioned in the radial direction outer side from the through-hole 32c. Thereby, the positional accuracy in the circumferential direction is improved. Further, by adopting a long pin, when the pin 91 is not inserted into the core hole 93, it is possible to make it difficult to fix with the fixing bolt 34 and to prevent fixing at an incorrect angle. In this embodiment, the pin 91 is fixed to the body 13, but instead, the pin 91 may be fixed to the stator core 32. Moreover, since the core hole 93 is a non-through hole, it is possible to prevent unintentional dropout of the pin 91 in the market.

(Ninth embodiment)
This embodiment is a modification based on the preceding embodiment. In this embodiment, a core hole 993 is employed instead of the core hole 93. FIG. 27 is a plan view corresponding to FIG. 28 is an enlarged cross-sectional view showing a cross section taken along line XXVIII-XXVIII in FIG. In FIG. 28, a radial cross section is shown in the upper half, and a cross section in the circumferential direction is shown in the lower half.

  The circumferential connecting portion 81 is provided by the body hole 92, the core hole 993, and the pin 91. The core hole 993 is a hole having an oval cross section. Core hole 993 has a long axis extending in the radial direction of stator 31. The core hole 993 has a short axis extending in the circumferential direction of the stator 31. It can be said that the short axis extends in the tangential direction of the stator 31. The width RW of the core hole 993 in the radial direction of the stator 31 is larger than the width CW of the core hole 993 in the circumferential direction of the stator 31 (RW> CW). The width RW is set so that the core hole 993 can receive the pin 91 even when the stator 31 is slightly displaced in the radial direction in the operation of mounting the stator 31 on the body 13. On the other hand, the width CW is set within an allowable error range so as to define the circumferential position of the stator 31 on the body 13. Since the width CW is smaller than the width RW, the stator 31 is positioned with high accuracy in the circumferential direction.

  The body hole 92 is a non-through hole having a bottom in the axial direction of the stator 31. The core hole 993 is a non-through hole having a bottom with respect to the axial direction of the stator 31. The non-through hole suppresses the intrusion of a corrosive substance such as water into the core hole 993 or the body hole 92.

  The stator core 32 is formed by laminating a plurality of metal plates. Many of the plurality of metal plates are electromagnetic steel plates. The core hole 993 is provided by a through hole provided in a part of the plurality of metal plates positioned on the body 13 side. The bottom of the core hole 993 is provided by the remaining metal plate positioned on the opposite side to the body 13 among the plurality of metal plates. The core hole 993 that is a non-through hole makes it possible to suppress corrosion of the metal plate.

  The body hole 92 is positioned within the range of the receiving surface 13b. The receiving surface 13 b is a plane that contacts the stator core 32. The receiving surface 13 b surrounds the opening end of the body hole 92. Similarly, the end surface of the stator core 32 that contacts the receiving surface 13 b surrounds the open end of the core hole 993. As a result, the opening end of the body hole 92 and the opening end of the core hole 993 are completely covered. Therefore, the intrusion of corrosive substances such as water from the facing portion of the body 13 and the stator core 32 into the body hole 92 and the core hole 993 is suppressed.

  The method for manufacturing a rotating electrical machine for an internal combustion engine includes a step of assembling the stator core 32 and an assembling step of assembling the stator core 32 to the body 13. The assembly process includes an insertion process of inserting the pin 91 into the core hole 993. In this insertion process, even if the stator core 32 is slightly displaced in the radial direction, the core hole 993 can easily receive the pin 91. Further, the gap formed between the core hole 993 and the pin 91 contributes to the discharge of air from the core hole 993. When the assembly process is performed by a work machine such as a robot, the core hole 993 provides accurate positioning in the circumferential direction while allowing errors in the radial direction of the work machine. When the assembly process is performed by an operator, the core hole 993 that is a non-through hole may prevent the operator from estimating the position of the core hole 993. However, the workability is facilitated by the core hole 993 having the width RW.

  According to this embodiment, corrosion caused by providing the pin 91, the body hole 92, and the core hole 993 is suppressed. In particular, corrosion at the pin 91 and the core hole 993 in which iron-based metal is used is suppressed. Further, since the core hole 993 can easily receive the pin 91, a rotating electrical machine for an internal combustion engine that can be easily manufactured is provided.

(Other embodiments)
The invention disclosed herein is not limited to the embodiments for carrying out the invention, and can be implemented with various modifications. The disclosed invention is not limited to the combinations shown in the embodiments, and can be implemented in various combinations. Embodiments can have additional parts. The portion of the embodiment may be omitted. The parts of the embodiments can be replaced or combined with the parts of the other embodiments. The structure, operation, and effect of the embodiment are merely examples. The technical scope of the disclosed invention is not limited to the description of the embodiments. Some technical scope of the disclosed invention is indicated by the description of the claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the claims. It is.

  As illustrated in the first to seventh embodiments, the inner trunk portions 72 a, 72 b, 72 c, 74 a, 74 b, 74 c, and 77 that provide the radial connection portion 71 are one of the stator core 32 and the body 13. Is provided. The axial protrusions 73 a, 73 b, 73 c, 75 a, 75 b, 75 c, 76 that provide the radial connection portion 71 are provided on the other of the stator core 32 and the body 13. In addition, the notches 83a, 83b, 83c, 87a, 87b, 87c, 88 that provide the circumferential connecting portion 81 are formed in the axial protruding portion, and the first end face 84 is formed at the circumferential end of the axial protruding portion. Form. The radial protrusions 82a, 82b, 83c, 86a, 86b, 86c, 89 that provide the circumferential connecting portion 81 are provided on the inner body portion so as to protrude radially inward from the cylindrical inner surface, A second end face 85 is formed at the end in the direction and inserted into the notch. Various modifications are possible within the technical scope indicated by the plurality of embodiments.

  In the above embodiment, the rotating electrical machine 10 has both a generator function and a motor function. Instead, the rotating electrical machine 10 may have only a generator function. Even in such a configuration, it is desirable that the stator 31 is accurately fixed at a predetermined position in the circumferential direction. For example, advantages are provided from various viewpoints such as performance as a generator, noise, and appearance. When the rotational position sensor for ignition control is provided in the stator core, an effect that the ignition signal can be output accurately is obtained. Further, the rotational position sensor for ignition control may be provided on the body 13, for example, without being provided on the stator 31. Even in such a configuration, since the circumferential position of the stator 31 is accurately described, an advantage is provided in at least one of various viewpoints such as performance as a rotating electric machine, noise, and appearance.

  Instead of the above embodiment, the circumferential position of the stator 31 may be defined by fitting a key provided on the stator core 32 or the boss portion 13a and a key groove provided on the boss portion 13a or the stator core 32. Moreover, you may employ | adopt combining the several circumferential direction connection part described in the said embodiment. For example, you may employ | adopt additionally the circumferential direction connection part which has the pin of 8th Embodiment further to the circumferential direction connection part of 1st Embodiment to 7th Embodiment.

  In the above embodiment, the round pin 91 is used. Instead of this, pins having various shapes such as a polygonal column and a semi-cylinder may be used. For example, when a semi-cylindrical pin is used, a semi-cylindrical pin can be provided on the outer surface of the protrusion 73a. The stator core 32 is provided with a semicircular groove that meshes with the pin on the inner surface of the through hole 32c. This configuration also provides a structure that defines both a radial position and a circumferential position for the stator 31. The body hole 92 and the core holes 93 and 993 are formed such that at least a part of the pin 91 is positioned inside or outside the annular range on the circumferential extension of the through hole 32d for the fixing bolt 34. May be. This configuration suppresses erroneous insertion of the pin 91 into the through hole 32d.

DESCRIPTION OF SYMBOLS 10 Rotating electrical machine for internal combustion engines, 11 Electrical circuit, 11a Wiring, 12 Internal combustion engine,
13 Body, 14 Rotating shaft, 21 Rotor, 22 Rotor core,
23 permanent magnets, 24 holding cups, 25 fixing bolts, 31 stators,
32 stator core, 32a magnetic pole, 33 coil, 34 fixing bolt,
41 sensor unit, 42 circuit component, 43 rotational position sensor,
44 fixing bolt, 51 case, 52 container, 53 cover,
54 tightening part, 55 connecting part, 61 leg part,
71 radial connection,
72a, 72b, 72c, 74a, 74b, 74c, 77
73a, 73b, 73c, 75a, 75b, 75c, 76 protrusion,
81 circumferential connecting portion,
82a, 82b, 83c, 86a, 86b, 86c, 89 protrusion,
83a, 83b, 83c, 87a, 87b, 87c, 88 notch,
84, 85 End face 91 Pin, 92 Body hole, 93, 993 Core hole.

Claims (12)

A rotor (21) in which a permanent magnet (23) for providing a field is disposed on an inner surface of a rotor core (22) connected to a rotating shaft of the internal combustion engine (12);
A stator core (32) that is disposed on the inner side of the rotor by being fixed to the body (13) of the internal combustion engine (12) and that forms a plurality of magnetic poles (32a) facing the permanent magnet on the radially outer side. A stator (31);
A circumferential connecting portion that is disposed radially inward from a radially outer edge of the stator and defines the position of the stator core with respect to the circumferential direction relative to the body by connecting the stator core and the body with respect to the circumferential direction of the stator. (81). A rotating electrical machine for an internal combustion engine, comprising: And a through hole (32d) formed in the stator core for receiving a fixing bolt for fixing the stator to the body,
2. The internal combustion engine according to claim 1, wherein a movable angle of the stator core with respect to a circumferential direction permitted by the circumferential connection portion is smaller than a movable angle of the stator core permitted by the fixing bolt and the through hole. Rotating electric machine.   Further, a radial connecting portion (71) that is disposed radially inward from the radially outer edge of the stator and defines the position of the stator core in the radial direction by connecting the stator core and the body with respect to the radial direction of the stator. 3. The rotating electrical machine for an internal combustion engine according to claim 1, further comprising: The radial connecting portion is
An inner body portion (72a, 72b, 72c, 74a, 74b, 74c, 77) provided on one of the stator core and the body, and provided on the other of the stator core and the body; A cylindrical outer surface located opposite to the cylindrical inner surface is provided, and an axial protrusion (73a, 73b, 73c, 75a, 75b, 75c, 76) is inserted into the inner trunk. The rotating electrical machine for an internal combustion engine according to claim 3. The circumferential connecting portion is
A notch (83a, 83b, 83c, 87a, 87b, 87c, 88) formed in the axial protrusion and forming a first end face (84) at a circumferential end of the axial protrusion; and A radial direction that is provided in the inner body portion so as to protrude radially inward from the cylindrical inner surface, forms a second end surface (85) at a circumferential end portion, and is inserted into the notch portion. 5. The rotating electrical machine for an internal combustion engine according to claim 4, further comprising a protrusion (82 a, 82 b, 83 c, 86 a, 86 b, 86 c, 89).   The rotating electrical machine for an internal combustion engine according to claim 5, wherein the notch and the radial protrusion are disposed asymmetrically with respect to the center of the stator.   The internal combustion engine according to any one of claims 1 to 6, wherein the circumferential connecting portion is provided by directly meshing the stator core and the body at a concave portion and a convex portion. Rotary electrical machinery for engines. The circumferential connecting portion is
8. The device according to claim 1, further comprising: a pin (91) inserted into a body hole (92) provided in the body and a core hole (93, 993) provided in the stator core. 9. A rotating electrical machine for an internal combustion engine according to claim 1.   The rotating electrical machine for an internal combustion engine according to claim 8, wherein the core hole is a non-through hole having a bottom in the axial direction of the stator.   The width (RW) of the core hole (993) in the radial direction of the stator is larger than the width (CW) of the core hole in the circumferential direction of the stator. Rotating electric machine for internal combustion engines. The circumferential connecting portion is
The rotating electrical machine for an internal combustion engine according to any one of claims 1 to 10, further comprising a meshing portion that allows the stator core and the body to be connected at a single position in the circumferential direction of the stator.   The said stator is provided with the rotation position sensor (43) for outputting the signal for ignition control, when the said rotor exists in a predetermined | prescribed rotation position. Rotating electric machine for internal combustion engines.

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