WO2016084352A1 - Rotating electrical machine for internal combustion engine - Google Patents

Rotating electrical machine for internal combustion engine Download PDF

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Publication number
WO2016084352A1
WO2016084352A1 PCT/JP2015/005781 JP2015005781W WO2016084352A1 WO 2016084352 A1 WO2016084352 A1 WO 2016084352A1 JP 2015005781 W JP2015005781 W JP 2015005781W WO 2016084352 A1 WO2016084352 A1 WO 2016084352A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
internal combustion
stator core
circumferential
combustion engine
Prior art date
Application number
PCT/JP2015/005781
Other languages
French (fr)
Japanese (ja)
Inventor
田中　良一
優太 小寺
金光　憲太郎
Original Assignee
デンソートリム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015212090A external-priority patent/JP6032340B2/en
Application filed by デンソートリム株式会社 filed Critical デンソートリム株式会社
Priority to CN201580064445.9A priority Critical patent/CN107005137B/en
Publication of WO2016084352A1 publication Critical patent/WO2016084352A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters

Definitions

  • This disclosure 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).
  • starter an electric motor
  • 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.
  • JP 2013-27252 A JP 2013-233030 A Japanese Patent No. 5097654 Japanese Patent No. 5064279
  • One object disclosed 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 disclosed 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 disclosed 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 the circular range of the stator.
  • a rotating electrical machine for an internal combustion engine is provided.
  • a rotating electrical machine for an internal combustion engine is disposed inside a rotor by being fixed to a body of the internal combustion engine and a rotor in which a permanent magnet for providing a magnetic field is disposed on an inner surface of a rotor core connected to a rotation shaft of the internal combustion engine.
  • a stator having a stator core that forms a plurality of magnetic poles facing the permanent magnet on the radially outer side, and arranged on the radially inner side from the radially outer edge of the stator to connect the stator core and the body in the circumferential direction of the stator.
  • a circumferential connecting portion that defines the position of the stator core in the circumferential direction with respect to the body.
  • the position in the circumferential direction of the stator core is defined by the circumferential connecting portion.
  • the circumferential direction connection part is arrange
  • the circumferential connecting portion is formed in the axial protruding portion, the cutout portion forming the first end surface at the circumferential end portion of the axial protruding portion, and the radially inner side from the cylindrical inner surface. It is provided in the inner body portion so as to protrude, and a second end surface is formed at the end portion in the circumferential direction, and a radial protrusion portion inserted into the notch portion can be provided.
  • the circumferential connecting portion may have a pin inserted into a body hole provided in the body and a core hole provided in the stator core.
  • 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.
  • the stator may include a rotational position sensor for outputting a signal for ignition control when the rotor is at a predetermined rotational position.
  • 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.
  • the electrical circuit 11 provides a rectifier circuit that rectifies the AC power that is output when the rotating electrical machine 10 functions as a generator and supplies power to an electrical load including a 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 has a cup shape.
  • 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 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.
  • the stator core 32 defines a through hole 32c for receiving the inner shaft of the rotary 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.
  • one rotational position sensor 43 provides a rotational position sensor for ignition control.
  • 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 of the field provided by the permanent magnet 23 in the rotational direction. 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 has a base portion 53a provided on the bottom surface of the case 51, and a tip 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
  • 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.
  • Each rotation 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.
  • 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.
  • 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 a leg portion 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.
  • 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.
  • the stator core 32 is fixed on the tip surface of the boss portion 13a.
  • 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.
  • a radial direction 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 connecting portion 71 has an inner trunk portion 72 a formed on 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 connecting portion 71 has a protruding portion 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.
  • 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 connecting portion 81 has a notch 83a formed in the boss portion 13a.
  • 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.
  • the stator core 32 has a through hole 32d 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.
  • the protruding portion 73a can be inserted into the inner trunk portion 72a.
  • 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.
  • 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 projecting portion 82a can be inserted inside the opening defined by the notch 83a 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.
  • 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.
  • 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.
  • 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.
  • the boss 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.
  • 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 protruding 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.
  • the same effect as the preceding embodiment can be obtained.
  • 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.
  • 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
  • the stator core 32 has three inner body portions 72a, 72b, 72c and three projecting portions 82a, 82b, 82c.
  • the protrusions 82 a, 82 b, 82 c provide six end surfaces including the end surface 84.
  • 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.
  • 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 protruding portions 73a, 73b, 73c.
  • the circumferential connecting portion 81 includes an end surface 84 defined by the three projecting portions 82a, 82b, and 82c, and an end surface 85 that is formed on the three projecting portions 73a, 73b, and 73c by the three notched portions 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.
  • the same effect as the preceding embodiment can be obtained.
  • 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.
  • 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.
  • This embodiment is a modified example based on the preceding 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.
  • 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.
  • 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.
  • the boss 13a has a protruding portion 75a and a notch 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.
  • 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.
  • the same effect as the preceding embodiment can be obtained. Furthermore, 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.
  • the stator core 32 has two inner body portions 74a and 74b and two projecting portions 86a and 86b.
  • 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.
  • the stator core 32 has three inner body portions 74a, 74b, and 74c and three protrusion portions 86a, 86b, and 86c.
  • 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.
  • the stator core 32 provides a cylindrical inner surface
  • the boss portion 13a provides a cylindrical outer surface
  • the stator core 32 may provide a cylindrical outer surface
  • the boss portion 13a may provide a cylindrical inner surface
  • 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.
  • the protrusion 76 provides an end face 84 at its end.
  • the notch 88 is partitioned by the end face 84.
  • the boss portion 13a 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.
  • the boss portion 13a provides a cylindrical inner surface.
  • 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.
  • the radial connecting portion 71 is provided by the cylindrical outer surface of the projecting 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.
  • the same effect as the preceding embodiment can be obtained.
  • the radial direction connection part 71 and the circumferential direction connection part 81 can be provided by an end plate.
  • 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.
  • 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 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 connecting portion 71 is formed by an inner trunk portion 72a and a protruding portion 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.
  • 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.
  • the body hole 92 and the core hole 93 are non-through holes having a bottom with respect to 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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 a body hole 92, a core hole 993, and a 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.
  • 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.
  • the end surface of the stator core 32 that contacts the receiving surface 13 b surrounds the open end of the core hole 993.
  • 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 manufacturing method of the rotating electrical machine for the internal combustion engine includes a process of assembling the stator core 32 and an assembling process 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.
  • the core hole 993 can easily receive the pin 91.
  • the gap formed between the core hole 993 and the pin 91 contributes to the discharge of air from the core hole 993.
  • the core hole 993 provides accurate positioning in the circumferential direction while allowing errors in the radial direction of the work machine.
  • the core hole 993 that is a non-through hole may prevent the operator from estimating the position of the core hole 993.
  • the workability is facilitated by the core hole 993 having the width RW.
  • corrosion caused by providing the pin 91, the body hole 92, and the core hole 993 is suppressed.
  • corrosion at the pin 91 and the core hole 993 in which iron-based metal is used is suppressed.
  • 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.
  • Embodiments The present disclosure is not limited to the embodiments and can be implemented with various modifications.
  • the disclosure is not limited to the combinations shown in the embodiments, and can be implemented by 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 disclosure is not limited to the description of the embodiments. Some technical scope of the disclosure is indicated by the description of the scope of claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the scope of claims.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a round bar pin 91 is used.
  • pins having various shapes such as a polygonal column and a semi-cylinder may be used.
  • 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.
  • the body hole 92 may be provided by holes having different widths RW and CW.

Abstract

　This rotating electrical machine (10) for internal combustion engine comprises a rotor (21) connected to a rotary spindle of an internal combustion engine (12), and a stator (31) fixed to the body (13) of the internal combustion engine (12). The stator (31) is connected and fixed to a boss part (13a) which extends from the body (13). A radial direction connecting part (71) is provided by the engagement of the protruding part (73a) of the boss part (13a) and the inner cavity (72a) with the stator core (32). The rotating electrical machine (10) is further equipped with a circumferential direction connecting part (81). The circumferential direction connecting part (81) is positioned further to the inside in the radial direction than the outer edge in the radial direction of the stator (31). The circumferential direction connecting part (81) connects the stator core (32) and the body (13) in the circumferential direction of the stator (31). The circumferential connecting part (81) restricts the position of the stator core (32) in the circumferential direction with respect to the body (13). The circumferential connecting part (81) is provided by meshing between notches and protrusions, or by a pin.

Description

内燃機関用回転電機Rotating electric machine for internal combustion engine 関連出願の相互参照Cross-reference of related applications
　この出願は、２０１４年１１月２８日に出願された日本特許出願２０１４－２４１１５６号、および２０１５年１０月２８日に出願された日本特許出願２０１５－２１２０９０号を基礎出願とするものであり、それら基礎出願の開示内容は参照によってこの出願に組み込まれている。 This application is based on Japanese Patent Application No. 2014-241156 filed on Nov. 28, 2014 and Japanese Patent Application No. 2015-212090 filed on Oct. 28, 2015. The disclosure of the basic application is incorporated into this application by reference.
　この開示は、内燃機関に連結される内燃機関用回転電機に関する。 This disclosure relates to a rotating electrical machine for an internal combustion engine connected to the internal combustion engine.
　特許文献１－４は、内燃機関に連結される内燃機関用回転電機を開示する。これらの回転電機は、発電機および／または電動機（スタータ）として機能することができる。従来技術として列挙された先行技術文献の記載内容は、この明細書に記載された技術的要素の説明として、参照によって導入ないし援用される。 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.
　特許文献３および特許文献４は、周方向に関してステータを正確に規定の位置に固定するために、ステータに固定された部材から径方向外側に延び出す腕部を設けている。腕部は、内燃機関のボディにボルトまたはピンによって固定される。 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.
特開２０１３－２７２５２号公報JP 2013-27252 A 特開２０１３－２３３０３０号公報JP 2013-233030 A 特許第５０９７６５４号公報Japanese Patent No. 5097654 特許第５０６４２７９号公報Japanese Patent No. 5064279
　従来技術では、ステータの周方向位置を規定するために、径方向外側に向けて延び出す樹脂製の腕部が必要である。しかし、内燃機関上における回転電機のための設置範囲は限られている。このため、樹脂製の腕部は回転電機の設置を困難とする場合がある。上述の観点において、または言及されていない他の観点において、内燃機関用回転電機にはさらなる改良が求められている。 In the prior art, in order to define the circumferential position of the stator, a resin arm that extends 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.
　開示されるひとつの目的は、周方向に関するステータの位置を規定できる内燃機関用回転電機を提供することである。 One object disclosed is to provide a rotating electrical machine for an internal combustion engine that can define the position of the stator in the circumferential direction.
　開示される他のひとつの目的は、小さい設置領域で、周方向に関するステータの位置を規定できる内燃機関用回転電機を提供することである。 Another object disclosed 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.
　開示される他のひとつの目的は、ステータの円形範囲内で、周方向に関するステータの位置を規定できる内燃機関用回転電機を提供することである。 Another object disclosed 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 the circular range of the stator.
　ここの開示は上記目的を達成するために以下の技術的手段を採用する。なお、特許請求の範囲およびこの項に記載した括弧内の符号は、ひとつの態様として後述する実施形態に記載の具体的手段との対応関係を示すものであって、開示の技術的範囲を限定するものではない。 This disclosure employs the following technical means in order to achieve the above object. Note that the reference numerals in parentheses described in the claims and in this section indicate the correspondence with the specific means described in the embodiments described later as one aspect, and limit the technical scope of the disclosure. Not what you want.
　開示により、内燃機関用回転電機が提供される。内燃機関用回転電機は、内燃機関の回転軸に連結されるロータコアの内面に、界磁を提供する永久磁石が配置されたロータと、内燃機関のボディに固定されることによってロータの内側に配置され、永久磁石と対向する複数の磁極を径方向外側に形成するステータコアを有するステータと、ステータの径方向外側縁より径方向内側に配置され、ステータコアとボディとをステータの周方向に関して連結することにより、ボディに対する周方向に関するステータコアの位置を規定する周方向連結部とを備えることを特徴とする。 According to the disclosure, a rotating electrical machine for an internal combustion engine is provided. A rotating electrical machine for an internal combustion engine is disposed inside a rotor by being fixed to a body of the internal combustion engine and a rotor in which a permanent magnet for providing a magnetic field is disposed on an inner surface of a rotor core connected to a rotation shaft of the internal combustion engine. And a stator having a stator core that forms a plurality of magnetic poles facing the permanent magnet on the radially outer side, and arranged on the radially inner side from the radially outer edge of the stator to connect the stator core and the body in the circumferential direction of the stator. And a circumferential connecting portion that defines the position of the stator core in the circumferential direction with respect to the body.
　周方向連結部によって、ステータコアの周方向に関する位置が規定される。周方向連結部は、ステータの径方向外側縁よりも径方向内側に配置されている。よって、ステータの影になる部分に周方向連結部が配置される。これにより、ステータの円形範囲内で、周方向に関するステータの位置を規定できる。 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.
　ひとつの実施形態では、周方向連結部は、軸方向突出部に形成され、軸方向突出部の周方向端部に第１の端面を形成する切欠部、および筒状内面から径方向内側に向けて突出するように内胴部に設けられ、周方向の端部に第２の端面を形成し、切欠部の中に挿入される径方向突出部を有することができる。 In one embodiment, the circumferential connecting portion is formed in the axial protruding portion, the cutout portion forming the first end surface at the circumferential end portion of the axial protruding portion, and the radially inner side from the cylindrical inner surface. It is provided in the inner body portion so as to protrude, and a second end surface is formed at the end portion in the circumferential direction, and a radial protrusion portion inserted into the notch portion can be provided.
　ひとつの実施形態では、周方向連結部は、ボディに設けられたボディ穴とステータコアに設けられたコア穴とに挿入されたピンを有することができる。 In one embodiment, the circumferential connecting portion may have a pin inserted into a body hole provided in the body and a core hole provided in the stator core.
　ひとつの実施形態では、周方向連結部は、ステータの周方向における唯一の位置においてステータコアとボディとの連結を許容する噛み合い部を有することができる。 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.
　ひとつの実施形態では、ステータは、ロータが所定の回転位置にあるときに点火制御用の信号を出力するための回転位置センサを備えることができる。 In one embodiment, the stator may include a rotational position sensor for outputting a signal for ignition control when the rotor is at a predetermined rotational position.
第１実施形態に係る内燃機関用回転電機の断面図である。It is sectional drawing of the rotary electric machine for internal combustion engines which concerns on 1st Embodiment. 第１実施形態のステータとセンサユニットを示す側面図である。It is a side view which shows the stator and sensor unit of 1st Embodiment. 第１実施形態のステータとセンサユニットを示す平面図である。It is a top view which shows the stator and sensor unit of 1st Embodiment. 第１実施形態のステータを示す平面図である。It is a top view which shows the stator of 1st Embodiment. 第１実施形態のステータを示す斜視図である。It is a perspective view which shows the stator of 1st Embodiment. 第１実施形態のボス部を示す斜視図である。It is a perspective view which shows the boss | hub part of 1st Embodiment. 第２実施形態のステータを示す平面図である。It is a top view which shows the stator of 2nd Embodiment. 第２実施形態のステータを示す斜視図である。It is a perspective view which shows the stator of 2nd Embodiment. 第２実施形態のボス部を示す斜視図である。It is a perspective view which shows the boss | hub part of 2nd Embodiment. 第３実施形態のステータを示す平面図である。It is a top view which shows the stator of 3rd Embodiment. 第３実施形態のステータを示す斜視図である。It is a perspective view which shows the stator of 3rd Embodiment. 第３実施形態のボス部を示す斜視図である。It is a perspective view which shows the boss | hub part of 3rd Embodiment. 第４実施形態のステータを示す平面図である。It is a top view which shows the stator of 4th Embodiment. 第４実施形態のステータを示す斜視図である。It is a perspective view which shows the stator of 4th Embodiment. 第４実施形態のボス部を示す斜視図である。It is a perspective view which shows the boss | hub part of 4th Embodiment. 第５実施形態のボス部を示す平面図である。It is a top view which shows the boss | hub part of 5th Embodiment. 第５実施形態のステータを示す斜視図である。It is a perspective view which shows the stator of 5th Embodiment. 第５実施形態のステータを示す斜視図である。It is a perspective view which shows the stator of 5th Embodiment. 第６実施形態のステータを示す平面図である。It is a top view which shows the stator of 6th Embodiment. 第６実施形態のステータを示す斜視図である。It is a perspective view which shows the stator of 6th Embodiment. 第６実施形態のボス部を示す斜視図である。It is a perspective view which shows the boss | hub part of 6th Embodiment. 第７実施形態のステータを示す平面図である。It is a top view which shows the stator of 7th Embodiment. 第７実施形態のステータを示す斜視図である。It is a perspective view which shows the stator of 7th Embodiment. 第７実施形態のボス部を示す斜視図である。It is a perspective view which shows the boss | hub part of 7th Embodiment. 第８実施形態に係る内燃機関用回転電機の断面図である。It is sectional drawing of the rotary electric machine for internal combustion engines which concerns on 8th Embodiment. 第８実施形態のステータとセンサユニットを示す平面図である。It is a top view which shows the stator and sensor unit of 8th Embodiment. 第９実施形態のステータとセンサユニットを示す平面図である。It is a top view which shows the stator and sensor unit of 9th Embodiment. 第８実施形態のピンと穴とを示す拡大断面図である。It is an expanded sectional view showing a pin and a hole of an 8th embodiment.
　図面を参照しながら、複数の実施形態を説明する。各形態において、先行する形態で説明した事項に対応する部分には同一の参照符号を付して重複する説明を省略する場合がある。また、後続の実施形態においては、先行する実施形態で説明した事項に対応する部分に百以上の位だけが異なる参照符号を付することにより対応関係を示し、重複する説明を省略する場合がある。各形態において、構成の一部のみを説明している場合は、構成の他の部分については他の形態の説明を参照し適用することができる。 A plurality of embodiments 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.
　第１実施形態
　図１において、内燃機関用回転電機（以下、単に回転電機という）１０は、発電電動機、または交流発電機スタータ（AC Generator Starter）とも呼ばれる。回転電機１０は、インバータ回路（ＩＮＶ）と制御装置（ＥＣＵ）とを含む電気回路１１と電気的に接続されている。電気回路１１は、三相の電力変換回路を提供する。回転電機１０の用途の一例は、車両用の内燃機関１２の発電電動機である。回転電機１０は、例えば、二輪車に利用することができる。 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.
　電気回路１１は、回転電機１０が発電機として機能するとき、出力される交流電力を整流し、バッテリを含む電気負荷に電力を供給する整流回路を提供する。電気回路１１は、回転電機１０から供給される点火制御用の基準位置信号を受信する信号処理回路を提供する。電気回路１１は、点火制御を実行する点火制御器を提供してもよい。電気回路１１は、回転電機１０を電動機として機能させる駆動回路を提供する。電気回路１１は、回転電機１０を電動機として機能させるための回転位置信号を回転電機１０から受信する。電気回路１１は、検出された回転位置に応じて回転電機１０への通電を制御することにより回転電機１０を電動機として機能させる。 The electrical circuit 11 provides a rectifier circuit that rectifies the AC power that is output when the rotating electrical machine 10 functions as a generator and supplies power to an electrical load including a 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.
　回転電機１０は、内燃機関１２に組み付けられている。内燃機関１２は、ボディ１３と、ボディ１３に回転可能に支持され、内燃機関１２と連動して回転する回転軸１４とを有する。回転電機１０は、ボディ１３と回転軸１４とに組み付けられている。ボディ１３は、内燃機関１２のクランクケース、ミッションケースなどの構造体である。回転軸１４は、内燃機関１２のクランク軸、またはクランク軸と連動する回転軸である。回転軸１４は、内燃機関１２が運転されることによって回転し、回転電機１０を発電機として機能させるように駆動する。回転軸１４は、回転電機１０が電動機として機能するとき、回転電機１０の回転によって内燃機関１２を始動可能な回転軸である。また、回転軸１４は、回転電機１０が電動機として機能するとき、回転電機１０の回転によって内燃機関１２の回転を支援（アシスト）することができる回転軸である。 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.
　回転電機１０は、ロータ２１と、ステータ３１と、センサユニット４１とを有する。ロータ２１は、界磁子である。ステータ３１は、電機子である。センサユニット４１は、回転位置検出器である。 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.
　ロータ２１は、全体がカップ状である。ロータ２１は、その開口端をボディ１３に向けて位置付けられる。ロータ２１は、回転軸１４の端部に固定される。ロータ２１と回転軸１４とは、キー嵌合などの回転方向の位置決め機構を介して連結されている。ロータ２１は、固定ボルト２５によって回転軸１４に締め付けられることによって固定されている。ロータ２１は、回転軸１４とともに回転する。ロータ２１は、永久磁石によって界磁を提供する。 The entire rotor 21 has a cup shape. 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.
　ロータ２１は、カップ状のロータコア２２を有する。ロータコア２２は、内燃機関１２の回転軸１４に連結される。ロータコア２２は、回転軸１４に固定される内筒と、内筒の径方向外側に位置する外筒と、内筒と外筒との間に拡がる環状の底板とを有する。ロータコア２２は、後述する永久磁石のためのヨークを提供する。ロータコア２２は、磁性金属製である。 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.
　ロータ２１は、ロータコア２２の内面に配置された永久磁石２３を有する。永久磁石２３は、外筒の内側に固定されている。永久磁石２３は、複数のセグメントを有する。それぞれのセグメントは、部分円筒状である。永久磁石２３は、その内側に、複数のＮ極と複数のＳ極とを提供する。永久磁石２３は、少なくとも界磁を提供する。永久磁石２３は、１２個のセグメントによって、６対のＮ極とＳ極、すなわち１２極の界磁を提供する。また、永久磁石２３は、点火制御のための基準位置信号を提供するための部分的な特殊磁極を提供する。特殊磁極は、界磁のための磁極配列とは異なる部分的な磁極によって提供される。永久磁石２３は、径方向内側に配置された保持カップ２４によって軸方向および径方向に関して固定されている。保持カップ２４は、薄い非磁性金属製である。保持カップ２４は、ロータコア２２に固定されている。 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.
　図２はステータ３１の径方向外側を示す。図３は、ステータ３１とセンサユニット４１とを含む部分的な平面図である。図３には図１の断面位置がＩ－Ｉ線によって示されている。図１－図３を参照することによりステータ３１とセンサユニット４１とが詳細に理解される。 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 line II. The stator 31 and the sensor unit 41 can be understood in detail with reference to FIGS.
　ステータ３１は、環状の部材である。ステータ３１は、ロータ２１とボディ１３との間に配置されている。ステータ３１は、回転軸１４とロータコア２２の内筒とを受け入れることができる貫通穴を有する。ステータ３１は、ロータ２１の内面とギャップを介して対向する外周面を有する。外周面には、複数の磁極３２ａが配置されている。これら磁極３２ａは、ロータ２１の界磁と対向して配置されている。ステータ３１は、電機子巻線を有する。ステータ３１は、多相の電機子巻線を有する。ステータ３１は、ボディ１３に固定される。ステータ３１は、複数の磁極３２ａと、複数の三相巻線とを有する三相多極ステータである。 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.
　ステータ３１は、ステータコア３２を有する。ステータコア３２は、内燃機関１２のボディ１３に固定されることによってロータ２１の内側に配置される。ステータコア３２は、永久磁石２３と対向する複数の磁極３２ａを径方向外側に形成する。ステータコア３２は、複数の磁極３２ａを形成するように所定の形状に成形された電磁鋼板を積層することにより形成されている。ステータコア３２は、永久磁石２３の内面と対向する複数の磁極３２ａを提供する。ステータコア３２の複数の磁極３２ａの間には、隙間３２ｂが設けられている。 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.
　ステータ３１は、ステータコア３２に巻回されたステータコイル３３を有する。ステータコイル３３は、電機子巻線を提供する。ステータコア３２とステータコイル３３との間には絶縁材料製のインシュレータが配置されている。ステータコイル３３は、三相巻線である。ステータコイル３３は、ロータ２１およびステータ３１を発電機または電動機として選択的に機能させることができる。 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.
　ステータ３１とボディ１３とは、固定ボルト３４を介して連結されている。ステータ３１は、複数の固定ボルト３４によってボディ１３に締め付けられることによって固定されている。ステータ３１は、ボディ１３から延び出すボス部１３ａに固定されている。ボス部１３ａは、筒状の部分である。ボス部１３ａは、ボディ１３と一体の金属製の部材である。 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.
　図３に図示されるように、ステータコア３２は、回転軸１４およびロータコア２２の内筒を受け入れるための貫通穴３２ｃを区画形成している。さらに、ステータコア３２は、複数の固定ボルト３４を受け入れるための複数の貫通穴３２ｄを有する。これら貫通穴３２ｄは、ステータコア３２の周方向に関する位置を規定するために貢献する。ただし、貫通穴３２ｄと固定ボルト３４との間の隙間は、ステータ３１に求められる周方向位置精度より大きい。さらに、ステータコア３２は、センサユニット４１を固定するための固定ボルト４４を受け入れるための貫通穴を有する。 3, the stator core 32 defines a through hole 32c for receiving the inner shaft of the rotary 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.
　センサユニット４１は、ステータ３１に固定される。センサユニット４１は、ステータコア３２とボディ１３との間に配置されている。センサユニット４１は、ステータコア３２の一端面に固定されている。センサユニット４１は、ロータ２１に設けられた永久磁石２３が供給する磁束を検出することにより、ロータ２１の回転位置を検出する。センサユニット４１は、複数の回転位置センサ４３を有する。複数の回転位置センサ４３は、隣接する２つの磁極３２ａの間に配置され、永久磁石２３の磁束を検出することによりロータ２１の回転位置を検出する。複数の回転位置センサ４３は、ロータ２１の回転軸に関して周方向に互いに離れて配置されている。 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.
　永久磁石２３が提供する特殊磁極の位置によって点火制御のための基準位置が示される。ロータ２１の回転位置は、回転軸１４の回転位置でもある。よって、ロータ２１の回転位置を検出することにより、点火制御のための基準位置信号を得ることができる。複数の回転位置センサ４３の少なくともひとつは、特殊磁極に反応することにより、点火制御のための信号を出力する。この実施形態では、ひとつの回転位置センサ４３が点火制御用の回転位置センサを提供する。この結果、ステータ３１は、ロータ２１が所定の回転位置にあるときに点火制御用の信号を出力するための回転位置センサを備える。 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.
　永久磁石２３が提供する界磁の回転方向の位置によってロータ２１の回転位置が示される。よって、ロータ２１の回転位置を検出し、検出された回転位置に応じて電機子巻線への通電を制御することにより、回転電機１０を電動機として機能させることができる。複数の回転位置センサ４３の少なくともひとつは、回転電機１０を少なくとも電動機として機能させるためのロータ２１の回転位置を検出する。この回転電機１０は、発電機および電動機として機能することができ、それらのいずれかとして選択的に機能させられる。 The rotational position of the rotor 21 is indicated by the position of the field provided by the permanent magnet 23 in the rotational direction. 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.
　センサユニット４１は、回路部品４２を収容する。回路部品４２は、基板と、基板に実装された電気素子、および電線などを含む。センサユニット４１は、回転位置センサ４３を収容する。センサユニット４１は、ケース５１を有する。 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.
　ケース５１は、樹脂材料製である。ケース５１は、部分的に金属部分をもつことができる。ケース５１は、回路部品４２と回転位置センサ４３とを収容し、保持する。回転位置センサ４３は、回路部品４２と接続される。ケース５１は、多角形筒、例えば台形筒の断面に相当する形状をもち、ステータ３１の径方向外側縁におおよそ対応して延びる外縁をもつ。ケース５１は、回路部品４２を収容するための容器５２を有する。容器５２は樹脂材料製である。容器５２は、ボディ１３に対向する面が開口した箱状である。容器５２は、ステータコア３２側に面する底面と、ボディ１３に対向する開口部と、底面と開口部とを囲む側壁とを有する。回路部品４２は、容器５２内に収容され、固定されている。 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.
　ケース５１は、少なくともひとつの回転位置センサ４３を収容し、支持するための少なくともひとつのカバー５３を有する。回転位置センサ４３は、カバー５３内に固定されている。カバー５３は、容器５２の底面から延び出すように形成された有底筒状の部材である。カバー５３は、径方向外側に設けられている。カバー５３は、２つの磁極３２ａの間の隙間３２ｂに挿入される。カバー５３は、容器５２と同じ樹脂材料によって容器５２から連続するように、一体成形されている。 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.
　カバー５３は、ケース５１の底面に設けられた基部５３ａと、基部５３ａから延び出す先端部５３ｂとを有する。先端部５３ｂは、基部５３ａより細い。基部５３ａは隙間３２ｂより広い幅を有する。基部５３ａと先端部５３ｂとの間には、段部５３ｃが形成されている。段部５３ｃは、ステータコア３２の端面に接触する。これにより、隙間３２ｂ内への先端部５３ｂの挿入量が規定される。 The cover 53 has a base portion 53a provided on the bottom surface of the case 51, and a tip 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.
　カバー５３の内部は、容器５２の内部に連通している。センサユニット４１は、複数のカバー５３を有する。カバー５３は、容器５２から延び出す指状、または舌状と呼びうる形状である。カバー５３は、回転位置センサ４３のための鞘とも呼ぶことができる。複数のカバー５３は、点火制御のための基準位置検出用の回転位置センサのためのひとつのカバー５３と、モータ制御のための回転位置センサのための３つのカバー５３とを有する。 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.
　それぞれのカバー５３内には、ひとつの回転位置センサ４３が収容される。回転位置センサ４３は、永久磁石２３が供給する磁束を検出する。回転位置センサ４３は、ホールセンサ、ＭＲＥセンサなどによって提供される。この実施形態は、点火制御のためのひとつの回転位置センサと、モータ制御のための３つの回転位置センサとを有する。回転位置センサ４３は、カバー５３内の空洞に配置されたセンサターミナルによって回路部品４２と電気的に接続される。 Each rotation 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.
　この実施形態における点火制御およびモータ制御のための永久磁石２３に関連する細部、および複数の回転位置センサ４３に関連する細部については、特許文献として列挙した特開２０１３－２３３０３０号公報、特開２０１３－２７２５２号公報、または特許第５０６４２７９号に記載の内容を援用することができ、同記載の内容は参照により引用されている。 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 Japanese Patent No. 27272 or Japanese Patent No. 5064279 can be incorporated, and the contents of the description are cited by reference.
　ケース５１は、締付部５４を有する。締付部５４は、回転電機１０の径方向に関して容器５２より径方向内側に設けられている。容器５２と締付部５４との間には、それらの間を連結するための連結部５５が設けられている。締付部５４と連結部５５とは、容器５２と同じ樹脂材料によって容器５２から連続するように、一体成形されている。固定ボルト４４は、ステータコア３２のボディ１３と反対側の面からステータコア３２を貫通して配置されている。固定ボルト４４のステータコア３２から突出する先端部は、締付部５４の雌ねじ部分に螺合される。これにより、センサユニット４１は、ステータコア３２に固定される。容器５２内は、保護用の封止樹脂５６によって満たされている。封止樹脂５６は回路部品４２を保護するためのポッティング樹脂である。 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.
　ケース５１は、脚部６１を有する。脚部６１は、ステータ３１がボディ１３に固定されることによって弾性的に変形する。これによりセンサユニット４１はステータ３１に向けて押し付けられる。なお、脚部６１なしでケース５１の位置が安定する場合、または脚部６１に代わる部分を有する場合には、脚部６１を備えない構成も採用することができる。 The case 51 has a leg portion 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.
　センサユニット４１は、回転位置センサ４３から出力される信号を外部に取り出すための外部接続用のリード線を有する。センサユニット４１は、複数の回転位置センサ４３からの信号を取り出すために複数のリード線を有する。回転電機１０は、ステータコイル３３と電気回路１１とを接続する複数の電力線を有する。電力線は、回転電機１０が発電機として機能するとき、ステータコイル３３に誘導される電力を電気回路１１に供給する。電力線は、回転電機１０が電動機として機能するとき、ステータコイル３３を励磁するための電力を電気回路１１からステータコイル３３へ供給する。リード線および電力線は、電線束１１ａとして形成され、敷設されている。電線束１１ａは、ステータ３１から径方向に延び出すように敷設されている。 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.
　図１および図３に図示されるように、ステータコア３２は、ボス部１３ａの先端面の上に固定されている。ボス部１３ａは、その先端に、ステータコア３２と軸方向に関して接触し、ステータコア３２を受ける受け面１３ｂを有する。図３には、ボス部１３ａの外形と、受け面１３ｂの範囲とが図示されている。受け面１３ｂは、貫通穴３２ｄの周囲に広がっている。さらに、受け面１３ｂは、貫通穴３２ｃの周囲に環状に延びている。受け面１３ｂは、固定ボルト３４を受け入れるためのボルト穴１３ｃの周囲において部分的に設けられてもよい。受け面１３ｂは、ステータコア３２を安定的に受けることができるように配置される。 1 and 3, the stator core 32 is fixed on the tip surface of the boss portion 13a. 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.
　ボス部１３ａとステータコア３２との間には、径方向に関してステータコア３２の位置を規定するための径方向連結部７１が形成されている。径方向連結部７１は、ボス部１３ａとステータコア３２との嵌め合いによって提供されている。径方向連結部７１は、嵌め合い部とも呼ぶことができる。径方向連結部７１は、ボス部１３ａの一部をステータコア３２の内側に軸方向に沿って挿入することによって提供されている。径方向連結部７１は、印ろう継ぎ部とも呼ばれる。径方向連結部７１は、ステータ３１の径方向外側縁より径方向内側に配置されている。径方向連結部７１は、ステータコア３２とボディ１３とをステータ３１の径方向に関して連結することにより径方向に関するステータコア３２の位置を規定する。 Between the boss portion 13a and the stator core 32, a radial direction 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.
　径方向連結部７１は、ステータコア３２に形成された内胴部７２ａを有する。内胴部７２ａは、周方向に沿って部分的に延びている。内胴部７２ａは、部分的な円筒内面を提供する。内胴部７２ａは、貫通穴３２ｃの一部分である。内胴部７２ａは、ステータ３１の径方向の位置を規定するための円筒内面を提供している。内胴部７２ａは、後述する突出部７３ａを受け入れる軸方向凹部とも呼ばれる。 The radial connecting portion 71 has an inner trunk portion 72 a formed on 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.
　径方向連結部７１は、突出部７３ａを有する。突出部７３ａは、ボス部１３ａから軸方向に延び出す部分円筒形の部分である。突出部７３ａは、内胴部７２ａの内側に挿入可能である。突出部７３ａは、部分筒状の円筒外面を提供する。突出部７３ａは、ステータ３１の径方向の位置を規定するための円筒外面を提供している。突出部７３ａは、軸方向突出部とも呼ばれる。 The radial direction connecting portion 71 has a protruding portion 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.
　ボス部１３ａとステータコア３２との間には、周方向に関してステータコア３２の位置を規定するための周方向連結部８１が形成されている。周方向に関するステータコア３２の位置は、ステータコア３２の角度位置とも呼ばれる。周方向連結部８１は、ボス部１３ａとステータコア３２との嵌め合いによって提供されている。周方向連結部８１は、ステータコア３２とボディ１３とを凹部と凸部とにおいて直接的に噛み合わせることによって提供されている。周方向連結部８１は、嵌め合い部とも呼ぶことができる。周方向連結部８１は、ボス部１３ａの一部と、ステータコア３２の一部とを、周方向に関して互いに噛み合うように位置付けることによって形成されている。周方向連結部８１は、噛み合い部とも呼ばれる。周方向連結部８１は、ステータ３１の径方向外側縁より径方向内側に配置されている。周方向連結部８１は、ステータコア３２とボディ１３とをステータ３１の周方向に関して連結することにより、ボディ１３に対する周方向に関するステータコア３２の位置を規定する。 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.
　周方向連結部８１は、ステータコア３２に形成された突出部８２ａを有する。突出部８２ａは、筒状部分７２より径方向内側に向けて突出するように形成されている。突出部８２ａは、周方向に関して筒状部分７２が設けられていない範囲を占めている。突出部８２ａは、その周方向の両側に端面８４を有する。端面８４は、周方向に面している。突出部８２ａは、貫通穴３２ｃの一部分である。突出部８２ａは、径方向突出部とも呼ばれる。 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.
　周方向連結部８１は、ボス部１３ａに形成された切欠部８３ａを有する。切欠部８３ａが形成されることにより、突出部７３ａは、切欠部８３ａに面する端面８５を提供する。端面８５は、切欠部８３ａの周方向端部を規定している。切欠部８３ａは、突出部８２ａに対応する位置に形成されている。切欠部８３ａは、突出部８２ａに対応する角度範囲にわたって形成されている。切欠部８３ａの形成範囲は、突出部８２ａを受け入れるために、突出部８２ａの形成範囲よりやや大きい。切欠部８３ａは、突出部８２ａを受け入れる径方向凹部とも呼ばれる。 The circumferential connecting portion 81 has a notch 83a formed in the boss portion 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.
　この実施形態では、ステータコア３２は、ステータコア３２に形成された貫通穴３２ｄを有する。貫通穴３２ｄは、ステータ３１をボディ１３に固定するための固定ボルト３４を受け入れる。固定ボルト３４と貫通穴３２ｄとは、ステータ３１の周方向位置を規定するために貢献する。周方向連結部８１が許容する周方向に関するステータコア３２の可動角度は、固定ボルト３４と貫通穴３２ｄとが許容するステータコア３２の可動角度より小さい。よって、周方向連結部８１により、周方向に関するステータ３１の位置精度、すなわち角度精度が向上される。 In this embodiment, the stator core 32 has a through hole 32d 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.
　図４は、ステータ３１の平面図である。図５は、ステータ３１の斜視図である。図中には、電線束１１ａの一部分が図示されている。電線束１１ａは、ホルダ１１ｂによってステータコア３２に固定されている。図中には、ステータコイル３３を結線するための端子台１１ｃが図示されている。 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.
　突出部８２ａは、切欠部８３ａに対応する位置に設けられている。突出部８２ａは、破線で示されるセンサユニット４１が配置される範囲以外の位置に設けられている。センサユニット４１は、３つの貫通穴３２ｄのうち、隣接する一組の貫通穴３２ｄの間に配置されている。突出部８２ａは、他の一組の貫通穴３２ｄの間に配置されている。この配置は、センサユニット４１とボス部１３ａとの干渉の抑制に貢献する。 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.
　図６は、ボス部１３ａの斜視図である。突出部７３ａは、ステータコア３２の内側に挿入される内筒を提供している。切欠部８３ａは、突出部７３ａの一部分に形成されている。端面８５は、突出部７３ａの周方向端面であり、切欠部８３ａを区画している。 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.
　内胴部７２ａの周方向長さは、突出部８２ａの周方向長さより長い。内胴部７２ａと突出部８２ａとは、ステータコア３２の中心に対して非対称に配置されている。突出部７３ａの周方向長さは、切欠部８３ａの周方向長さより長い。突出部７３ａと切欠部８３ａとは、ボス部１３ａの中心に対して非対称に配置されている。周方向連結部８１を提供する切欠部８３ａと径方向の突出部８２ａとは、ステータ３１の中心に対して非対称に配置されている。周方向連結部８１は、突出部８２ａと切欠部８３ａとの噛み合い可能な位置を、周方向における唯一の位置に限定する。よって、周方向連結部８１は、ステータ３１の周方向における唯一の位置においてステータコア３２とボディ１３との連結を許容する噛み合い部を提供する。 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.
　図１および図３に戻り、突出部７３ａは、内胴部７２ａの中に挿入可能である。内胴部７２ａの円筒内面と、突出部７３ａの円筒外面との間には、微小な隙間が形成される。円筒内面と円筒外面とは、ステータコア３２の径方向位置を規定するように、周方向に沿って連続的に、または断続的に広がっている。図示の例では、円筒内面と円筒外面とは１８０度の角度範囲を超えて広がっている。円筒内面と円筒外面とは、ほぼ２７０度の角度にわたって広がっている。円筒内面と円筒外面とによって、ボス部１３ａの上におけるステータコア３２の径方向に関する位置が規定される。 1 and 3, the protruding portion 73a can be inserted into the inner trunk portion 72a. 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.
　突出部８２ａは、切欠部８３ａが周方向に関して区画する開口の内側に挿入可能である。突出部８２ａは、突出部７３ａが軸方向に沿って内胴部７２ａの中に挿入されるときに、軸方向に沿って切欠部８３ａの中に挿入される。突出部８２ａの端面８４と、切欠部８３ａの端面８５との間には、微小な隙間が形成される。端面８４と端面８５とによって、ボス部１３ａの上におけるステータコア３２の周方向に関する位置が規定される。 The projecting portion 82a can be inserted inside the opening defined by the notch 83a 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.
　以上に述べた実施形態によると、ステータコア３２とボス部１３ａ、すなわちボディ１３との直接的な噛み合いによって、ステータ３１の径方向位置と、周方向位置との両方が規定される。このため、ステータ３１のための設置範囲内において径方向位置と周方向位置との両方が正確に規定される。しかも、センサユニット４１から径方向外側に延び出す樹脂製の部材を要することなく径方向位置と周方向位置との両方が規定される。ボディ１３上における規定の位置にステータ３１を正確に固定することができる。これにより、ステータ３１の位置誤差に起因する多様な不具合が抑制される。有利な効果のひとつは、点火制御用の回転位置センサ４３の周方向に関する位置が、ボディ１３上の規定の位置に正確に位置づけられることによる点火制御の精度向上である。 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.
　第２実施形態
　この実施形態は、先行する実施形態を基礎的形態とする変形例である。上記実施形態では、周方向連結部８１は、ひとつの突出部８２ａとひとつの切欠部８３ａとで提供される。これに代えて、周方向連結部８１は、複数の突出部と切欠部とによって提供することができる。 Second Embodiment This embodiment is a modified example 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.
　図７、図８において、ステータコア３２は、２つの内胴部７２ａ、７２ｂと、２つの突出部８２ａ、８２ｂとを有する。突出部８２ａ、８２ｂは、端面８４を含む４つの端面を提供する。突出部８２ａ、８２ｂは、破線で示されるセンサユニット４１が配置される範囲以外の位置に設けられている。 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.
　図９において、ボス部１３ａは、２つの突出部７３ａ、７３ｂと、２つの切欠部８３ａ、８３ｂとを有する。２つの突出部７３ａ、７３ｂは、一連の円筒外面を規定するように形成され、配置されている。２つの突出部７３ａ、７３ｂは、径方向連結部７１のための内筒を提供している。切欠部８３ａ、８３ｂは、突出部７３ａ、７３ｂの間に、それらを分断するように形成されている。切欠部８３ａ、８３ｂが設けられることによって、突出部７３ａ、７３ｂは、端面８５を含む４つの端面を提供する。切欠部８３ａ、８３ｂは、突出部８２ａ、８２ｂに対応する位置に設けられている。 In FIG. 9, the boss 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.
　径方向連結部７１は、２つの内胴部７２ａ、７２ｂが規定する円筒内面と、２つの突出部７３ａ、７３ｂが規定する円筒外面とによって提供される。周方向連結部８１は、２つの突出部８２ａ、８２ｂが規定する端面８４と、２つの切欠部８３ａ、８３ｂによって２つの突出部７３ａ、７３ｂに形成される端面８５とによって提供される。 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 protruding 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.
　内胴部７２ａの周方向の長さと内胴部７２ｂの周方向の長さとは異なる。内胴部７２ａの周方向の長さは、内胴部７２ｂの周方向の長さより長い。突出部８２ａの周方向の長さと突出部８２ｂの周方向の長さとは異なる。突出部８２ｂの周方向の長さは、突出部８２ａの周方向の長さより長い。内胴部７２ａ、７２ｂと突出部８２ａ、８２ｂとは、ステータコア３２の中心に対して非対称に配置されている。突出部７３ａの周方向の長さと突出部７３ｂの周方向の長さとは異なる。突出部７３ａの周方向の長さは、突出部７３ｂの周方向の長さより長い。切欠部８３ａの周方向の長さと切欠部８３ｂの周方向の長さとは異なる。切欠部８３ｂの周方向の長さは、切欠部８３ａの周方向の長さより長い。突出部７３ａ、７３ｂと切欠部８３ａ、８３ｂとは、ボス部１３ａの中心に対して非対称に配置されている。周方向連結部８１は、突出部８２ａ、８２ｂと切欠部８３ａ、８３ｂとの噛み合い可能な位置を、周方向における唯一の位置に限定する。 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.
　この実施形態でも、先行する実施形態と同様の作用効果が得られる。さらに、内胴部７２ａ、７２ｂが周方向に分散して配置される。これにより、ステータ３１の径方向の位置が安定的に規定される。また、突出部７３ａ、７３ｂと、突出部８２ａ、８２ｂは、複数の端面８４、８５を提供するから、周方向に関する接触部分が分散される。これにより、周方向の位置が安定的に規定される。 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.
　第３実施形態
　この実施形態は、先行する実施形態を基礎的形態とする変形例である。 Third Embodiment This embodiment is a modification in which the preceding embodiment is a basic form.
　図１０、図１１において、ステータコア３２は、３つの内胴部７２ａ、７２ｂ、７２ｃと、３つの突出部８２ａ、８２ｂ、８２ｃとを有する。突出部８２ａ、８２ｂ、８２ｃは、端面８４を含む６つの端面を提供する。 10 and 11, the stator core 32 has three inner body portions 72a, 72b, 72c and three projecting portions 82a, 82b, 82c. The protrusions 82 a, 82 b, 82 c provide six end surfaces including the end surface 84.
　図１２において、ボス部１３ａは、３つの突出部７３ａ、７３ｂ、７３ｃと、３つの切欠部８３ａ、８３ｂ、８３ｃとを有する。３つの突出部７３ａ、７３ｂ、７３ｃは、一連の円筒外面を規定するように形成され、配置されている。切欠部８３ａ、８３ｂ、８３ｃが設けられることによって、突出部７３ａ、７３ｂ、７３ｃは、端面８５を含む６つの端面を提供する。切欠部８３ａ、８３ｂ、８３ｃは、突出部８２ａ、８２ｂ、８２ｃに対応する位置に設けられている。 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.
　径方向連結部７１は、３つの内胴部７２ａ、７２ｂ、７２ｃが規定する円筒内面と、３つの突出部７３ａ、７３ｂ、７３ｃが規定する円筒外面とによって提供される。周方向連結部８１は、３つの突出部８２ａ、８２ｂ、８２ｃが規定する端面８４と、３つの切欠部８３ａ、８３ｂ、８３ｃによって３つの突出部７３ａ、７３ｂ、７３ｃに形成される端面８５とによって提供される。 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 protruding portions 73a, 73b, 73c. The circumferential connecting portion 81 includes an end surface 84 defined by the three projecting portions 82a, 82b, and 82c, and an end surface 85 that is formed on the three projecting portions 73a, 73b, and 73c by the three notched portions 83a, 83b, and 83c. Provided.
　３つの内胴部７２ａ、７２ｂ、７２ｃのひとつの周方向の長さは、残る２つの周方向の長さとは異なる。３つの突出部８２ａ、８２ｂ、８２ｃの周方向の長さは等しい。内胴部７２ａ、７２ｂ、７２ｃと突出部８２ａ、８２ｂ、８２ｃとは、ステータコア３２の中心に対して非対称に配置されている。３つの突出部７３ａ、７３ｂ、７３ｃのひとつの周方向の長さは、残る２つの周方向の長さとは異なる。３つの切欠部８３ａ、８３ｂ、８３ｃの周方向の長さは等しい。突出部７３ａ、７３ｂ、７３ｃと切欠部８３ａ、８３ｂ、８３ｃとは、ボス部１３ａの中心に対して非対称に配置されている。周方向連結部８１は、突出部８２ａ、８２ｂ、８２ｃと切欠部８３ａ、８３ｂ、８３ｃとの噛み合い可能な位置を、周方向における唯一の位置に限定する。 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.
　この実施形態でも、先行する実施形態と同様の作用効果が得られる。さらに、内胴部７２ａ、７２ｂ、７２ｃが周方向に分散して配置される。これにより、ステータ３１の径方向の位置が安定的に規定される。また、突出部７３ａ、７３ｂ、７３ｃと、突出部８２ａ、８２ｂ、８２ｃは、複数の端面８４、８５を提供するから、周方向に関する接触部分が分散される。これにより、周方向の位置が安定的に規定される。 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.
　第４実施形態
　この実施形態は、先行する実施形態を基礎的形態とする変形例である。上記実施形態では、ステータコア３２の貫通穴３２ｃの軸方向全長にわたって内胴部７２ａ、７２ｂ、７２ｃと突出部８２ａ、８２ｂ、８２ｃとが形成されている。これに代えて、貫通穴３２ｃの軸方向の一部、特に角部だけに内胴部と突出部とを形成することができる。 Fourth Embodiment This embodiment is a modified example 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.
　図１３、図１４において、ステータコア３２は、内胴部７４ａを有する。内胴部７４ａは、ステータコア３２の貫通穴３２ｃの端部に形成された浅い溝によって提供されている。ステータコア３２は、突出部８６ａを有する。突出部８６ａは、溝が形成されることなく残された島部によって提供されている。ステータコア３２は、複数のケイ素鋼板を積層することによって形成されている。溝は、一部のケイ素鋼板に形成されている。溝は、ステータコア３２の端部にエンドプレートが設けられる場合には、このエンドプレートに形成することができる。溝によって提供された内胴部７４ａは、円筒内面を提供する。島部によって提供された突出部８６ａは、端面８４を提供する。 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.
　図１５において、ボス部１３ａは、突出部７５ａと、切欠部８７ａとを有する。突出部７５ａは、一連の円筒外面を提供する。突出部７５ａは、内胴部７４ａを提供する溝に挿入可能である。切欠部８７ａが設けられることによって、突出部７５ａは、端面８５を提供する。切欠部８７ａは、突出部８６ａに対応する位置に設けられている。 In FIG. 15, the boss 13a has a protruding portion 75a and a notch 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.
　内胴部７４ａは、先行する実施形態の内胴部７２ａに相当する。突出部８６ａは、先行する実施形態の突出部８２ａに相当する。突出部７５ａは、先行する実施形態の突出部７３ａに相当する。切欠部８７ａは、先行する実施形態の切欠部８３ａに相当する。 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.
　この実施形態でも、先行する実施形態と同様の作用効果が得られる。さらに、この実施形態によると、比較的厚い突出部７５ａを設けることができるから、高い強度を得ることができる。また、ステータコア３２に形成された溝によって内胴部７４ａと突出部８６ａとが提供されるから、大きい貫通穴３２ｃを要することなく、径方向連結部７１と周方向連結部８１とを提供することができる。 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.
　第５実施形態
　この実施形態は、先行する実施形態を基礎的形態とする変形例である。図１６、図１７において、ステータコア３２は、２つの内胴部７４ａ、７４ｂと、２つの突出部８６ａ、８６ｂとを有する。図１８において、ボス部１３ａは、２つの突出部７５ａ、７５ｂと、２つの切欠部８７ａ、８７ｂとを有する。内胴部７４ａ、７４ｂは、先行する実施形態の内胴部７２ａ、７２ｂに相当する。突出部８６ａ、８６ｂは、先行する実施形態の突出部８２ａ、８２ｂに相当する。突出部７５ａ、７５ｂは、先行する実施形態の突出部７３ａ、７３ｂに相当する。切欠部８７ａ、８７ｂは、先行する実施形態の切欠部８３ａ、８３ｂに相当する。この実施形態でも、先行する実施形態と同様の作用効果が得られる。 Fifth Embodiment This embodiment is a modified example 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.
　第６実施形態
　この実施形態は、先行する実施形態を基礎的形態とする変形例である。図１９、図２０において、ステータコア３２は、３つの内胴部７４ａ、７４ｂ、７４ｃと、３つの突出部８６ａ、８６ｂ、８６ｃとを有する。図２１において、ボス部１３ａは、３つの突出部７５ａ、７５ｂ、７５ｃと、３つの切欠部８７ａ、８７ｂ、８７ｃとを有する。 Sixth Embodiment This embodiment is a modification in which the preceding embodiment is a basic form. 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.
　内胴部７４ａ、７４ｂ、７４ｃは、先行する実施形態の内胴部７２ａ、７２ｂ、７２ｃに相当する。突出部８６ａ、８６ｂ、８６ｃは、先行する実施形態の突出部８２ａ、８２ｂ、８２ｃに相当する。突出部７５ａ、７５ｂ、７５ｃは、先行する実施形態の突出部７３ａ、７３ｂ、７３ｃに相当する。切欠部８７ａ、８７ｂ、８７ｃは、先行する実施形態の切欠部８３ａ、８３ｂ、８３ｃに相当する。この実施形態でも、先行する実施形態と同様の作用効果が得られる。 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.
　第７実施形態
　この実施形態は、先行する実施形態を基礎的形態とする変形例である。上記実施形態では、ステータコア３２が筒状内面を提供し、ボス部１３ａが筒状外面を提供する。これに代えて、ステータコア３２が筒状外面を提供し、ボス部１３ａが筒状内面を提供してもよい。 Seventh Embodiment This embodiment is a modified example 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.
　図２２、図２３において、ステータコア３２は、突出部７６を有する。突出部７６は、ステータコア３２の端部に設けられたエンドプレートから軸方向に向けて部分筒状に延び出している。突出部７６は、その外周面に筒状外面を提供する。ステータコア３２は、切欠部８８を有する。切欠部８８は、突出部７６を分断するように形成されている。切欠部８８が設けられることによって、突出部７６は、その端部に端面８４を提供する。切欠部８８は、端面８４によって区画されている。 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.
　図２４において、ボス部１３ａは、内胴部７７を有する。内胴部７７は、ボス部１３ａに形成された溝によって提供されている。溝は、受け面１３ｂより凹んでいる。内胴部７７が形成されることにより、ボス部１３ａは筒状内面を提供する。図中には、ボルト穴１３ｃが形成される柱状部分の内側に筒状内面が提供されている。ボス部１３ａは、突出部８９を有する。突出部８９は、溝が形成されることなく残された島部によって提供されている。突出部８９は、端面８５を提供する。突出部８９は、切欠部８８に対応する位置に設けられている。 24, the boss portion 13a 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.
　この実施形態では、径方向連結部７１は、突出部７６の筒状外面と、内胴部７７の筒状内面とによって提供される。周方向連結部８１は、切欠部８８が形成されることによって突出部７６に形成された端面８４と、突出部８９に形成された端面８５とによって提供される。 In this embodiment, the radial connecting portion 71 is provided by the cylindrical outer surface of the projecting 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.
　この実施形態でも、先行する実施形態と同様の作用効果が得られる。さらに、この実施形態によると、エンドプレートによって径方向連結部７１と周方向連結部８１とを提供することができる。この実施形態でも、先行する複数の実施形態のように、複数の突出部７６、複数の内胴部７７、複数の切欠部８８、および複数の突出部８９を設けてもよい。 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.
　第８実施形態
　この実施形態は、先行する実施形態を基礎的形態とする変形例である。上記実施形態では、ステータコア３２とボディ１３との直接的な嵌め合いによって径方向連結部７１と周方向連結部８１との両方が提供される。これに代えて、少なくとも周方向連結部８１を金属製の連結部材を介して形成してもよい。 Eighth Embodiment This embodiment is a modification example 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.
　図２５は、回転電機の断面図を示す。図２６は、ステータ３１とセンサユニット４１とを含む部分的な平面図である。図２６には図２５の断面位置がＸＸＶ－ＸＸＶ線によって示されている。 FIG. 25 shows a 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.
　径方向連結部７１は、内胴部７２ａと突出部７３ａとによって形成されている。周方向連結部８１は、金属製のピン９１によって形成されている。ピン９１は、ノックピンまたはスタッドピンと呼ばれる。ピン９１は、丸棒である。ピン９１は、ボディ１３のボス部１３ａに設けられたピン穴であるボディ穴９２に固定されている。ピン９１は、ボディ穴９２に圧入されている。ピン９１は、ステータコア３２に形成されたピン穴であるコア穴９３に挿入可能である。コア穴９３は、センサユニット４１が配置される範囲以外の部位に設けられている。ピン９１とコア穴９３との間の隙間はきわめて小さい。ピン９１による周方向連結部８１は、固定ボルト３４と貫通穴３２ｄとによる周方向位置の規定よりも高い精度でステータ３１の周方向位置を規定する。 The radial connecting portion 71 is formed by an inner trunk portion 72a and a protruding portion 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.
　ボディ穴９２は、受け面１３ｂに形成されている。ボディ穴９２を形成するために、ボス部１３ａは、ボルト穴１３ｃを形成するための隆起部分に隣接する追加的な隆起部分を有する。ボディ穴９２およびピン９１は、ステータ３１上のセンサユニット４１とは直径方向に反対の位置に設けられている。 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.
　図２５に図示されるように、ボディ穴９２およびコア穴９３は、ステータ３１の軸方向に関して底を有する非貫通穴である。ピン９１は、受け面１３ｂから延び出している。ピン９１は、径方向連結部７１のための突出部７３ａより高く受け面１３ｂから延び出している。言い換えると、ピン９１の突出長さは、径方向連結部７１のための突出部７３ａの突出長さより長い。これにより、ピン９１がコア穴９３に挿入されない状態で、径方向連結部７１だけが嵌め合い状態になることが回避される。よって、径方向連結部７１と周方向連結部８１との両方を確実に嵌め合い状態にすることができる。 25, the body hole 92 and the core hole 93 are non-through holes having a bottom with respect to 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.
　この実施形態の周方向連結部８１は、ボディ１３に設けられたボディ穴９２とステータコア３２に設けられたコア穴９３とに挿入されたピン９１を有する。この実施形態でも、先行する実施形態と同様の作用効果が得られる。さらに、この実施形態によると、周方向連結部８１を貫通穴３２ｃより径方向外側に配置することができる。これにより、周方向に関する位置精度が向上する。また、長いピンを採用することにより、ピン９１がコア穴９３に挿入されない場合に固定ボルト３４による固定を困難にすることができ、誤った角度での固定を阻止することができる。この実施形態では、ピン９１をボディ１３に固定したが、これに代えて、ピン９１をステータコア３２に固定してもよい。また、コア穴９３は非貫通穴であるから、ピン９１の市場における意図しない脱落を防止することが可能である。 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.
　第９実施形態
　この実施形態は、先行する実施形態を基礎的形態とする変形例である。この実施形態では、コア穴９３に代えて、コア穴９９３が採用される。図２７は図２６に相当する平面図である。図２８は、図２７のＸＸＶＩＩＩ－ＸＸＶＩＩＩ線における断面を示す拡大断面図である。図２８において、上半部には径方向の断面が図示され、下半部には周方向における断面が図示されている。 Ninth Embodiment This embodiment is a modification example 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.
　周方向連結部８１は、ボディ穴９２、コア穴９９３、およびピン９１によって提供されている。コア穴９９３は、長円形の断面をもつ穴である。コア穴９９３は、ステータ３１の径方向に延びる長軸を有する。コア穴９９３は、ステータ３１の周方向に延びる短軸を有する。なお、短軸は、ステータ３１の接線方向に延びているともいえる。ステータ３１の径方向におけるコア穴９９３の幅ＲＷは、ステータ３１の周方向におけるコア穴９９３の幅ＣＷより大きい（ＲＷ＞ＣＷ）。幅ＲＷは、ステータ３１をボディ１３に装着する作業において、ステータ３１が径方向に関してややずれていても、コア穴９９３がピン９１を受け入れることができるように設定されている。一方、幅ＣＷは、ボディ１３上におけるステータ３１の周方向位置を規定するように、許容される誤差の範囲内に設定されている。幅ＣＷが幅ＲＷより小さいことにより、周方向に関してステータ３１が高精度に位置づけられる。 The circumferential connecting portion 81 is provided by a body hole 92, a core hole 993, and a 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.
　ボディ穴９２は、ステータ３１の軸方向に関して底を有する非貫通穴である。コア穴９９３は、ステータ３１の軸方向に関して底を有する非貫通穴である。非貫通穴は、コア穴９９３またはボディ穴９２への水など腐食性物質の浸入を抑制する。 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.
　ステータコア３２は、複数の金属板を積層することによって形成されている。複数の金属板の多くは、電磁鋼板である。コア穴９９３は、複数の金属板のうち、ボディ１３側に位置づけられる一部の金属板に設けられた貫通穴によって提供されている。コア穴９９３の底は、複数の金属板のうち、ボディ１３とは反対側に位置づけられる残る金属板によって提供されている。非貫通穴であるコア穴９９３は、金属板の腐蝕を抑制することを可能とする。 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.
　ボディ穴９２は、受け面１３ｂの範囲内に位置づけられている。受け面１３ｂは、ステータコア３２と接触する平面である。受け面１３ｂは、ボディ穴９２の開口端を囲む。同様に、受け面１３ｂと接触するステータコア３２の端面は、コア穴９９３の開口端を囲む。この結果、ボディ穴９２の開口端およびコア穴９９３の開口端は完全に覆われる。よって、ボディ１３とステータコア３２との対向部からボディ穴９２およびコア穴９９３への水など腐食性物質の浸入が抑制される。 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.
　内燃機関用回転電機の製造方法は、ステータコア３２を組み立てる工程と、ステータコア３２をボディ１３に組み付ける組み付け工程とを有する。組み付け工程は、ピン９１をコア穴９９３に挿入する挿入工程を含む。この挿入工程において、ステータコア３２がその径方向にややずれていても、コア穴９９３は、ピン９１を受け入れやすい。さらに、コア穴９９３とピン９１との間に形成される隙間は、コア穴９９３内からの空気の排出に貢献する。組み付け工程がロボットなどの作業機械によって実行される場合、コア穴９９３は、作業機械の径方向に関する誤差を許容しながら、周方向において正確な位置決めを提供する。組み付け工程が作業者によって実施される場合、非貫通穴であるコア穴９９３は、作業者によるコア穴９９３の位置の推測を妨げることがある。しかし、幅ＲＷをもつコア穴９９３によって、作業の容易さが促進される。 The manufacturing method of the rotating electrical machine for the internal combustion engine includes a process of assembling the stator core 32 and an assembling process 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.
　この実施形態によると、ピン９１、ボディ穴９２、およびコア穴９９３を設けることに起因する腐蝕が抑制される。特に、鉄系の金属が用いられるピン９１およびコア穴９９３における腐蝕が抑制される。また、コア穴９９３はピン９１を受け入れやすいから、容易に製造できる内燃機関用回転電機が提供される。 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.
　他の実施形態
　この開示は、実施形態に何ら制限されることなく、種々変形して実施することが可能である。開示は、実施形態において示された組み合わせに限定されることなく、種々の組み合わせによって実施可能である。実施形態は追加的な部分をもつことができる。実施形態の部分は、省略される場合がある。実施形態の部分は、他の実施形態の部分と置き換え、または組み合わせることも可能である。実施形態の構造、作用、効果は、あくまで例示である。開示の技術的範囲は、実施形態の記載に限定されない。開示のいくつかの技術的範囲は、特許請求の範囲の記載によって示され、さらに特許請求の範囲の記載と均等の意味及び範囲内での全ての変更を含むものと解されるべきである。 Other Embodiments The present disclosure is not limited to the embodiments and can be implemented with various modifications. The disclosure is not limited to the combinations shown in the embodiments, and can be implemented by 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 disclosure is not limited to the description of the embodiments. Some technical scope of the disclosure is indicated by the description of the scope of claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the scope of claims.
　第１実施形態から第７実施形態に例示されるように、径方向連結部７１を提供する内胴部７２ａ、７２ｂ、７２ｃ、７４ａ、７４ｂ、７４ｃ、７７は、ステータコア３２とボディ１３との一方に設けられる。径方向連結部７１を提供する軸方向の突出部７３ａ、７３ｂ、７３ｃ、７５ａ、７５ｂ、７５ｃ、７６は、ステータコア３２とボディ１３との他方に設けられる。また、周方向連結部８１を提供する切欠部８３ａ、８３ｂ、８３ｃ、８７ａ、８７ｂ、８７ｃ、８８は、軸方向突出部に形成され、軸方向突出部の周方向端部に第１の端面８４を形成する。周方向連結部８１を提供する径方向の突出部８２ａ、８２ｂ、８３ｃ、８６ａ、８６ｂ、８６ｃ、８９は、筒状内面から径方向内側に向けて突出するように内胴部に設けられ、周方向の端部に第２の端面８５を形成し、切欠部の中に挿入される。これら複数の実施形態により示される技術的範囲において多様な変更が可能である。 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.
　上記実施形態では回転電機１０は発電機機能と電動機機能との両方を備える。これに代えて、回転電機１０は発電機機能だけを備えていてもよい。かかる構成においても、ステータ３１が周方向に関して正確に規定の位置に固定されることが望ましい。例えば、発電機としての性能、騒音、および外観といった多様な観点から利点が提供される。点火制御用の回転位置センサがステータコアに設けられる場合、点火信号を正確に出力できる効果が得られる。また、点火制御用の回転位置センサは、ステータ３１に設けることなく、例えばボディ１３上に設けてもよい。かかる構成においても、ステータ３１の周方向位置が正確に記載されるから、回転電機としての性能、騒音、および外観といった多様な観点の少なくともひとつにおいて利点が提供される。 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.
　上記実施形態に代えて、ステータコア３２またはボス部１３ａに設けたキーと、ボス部１３ａまたはステータコア３２に設けたキー溝との嵌め合いによってステータ３１の周方向位置を規定してもよい。また、上記実施形態において述べた複数の周方向連結部を組み合わせて採用してもよい。例えば、第１実施形態から第７実施形態の周方向連結部に、さらに第８実施形態のピンを有する周方向連結部を追加的に採用してもよい。 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.
　上記実施形態では、丸棒のピン９１が用いられる。これに代えて、多角柱、半円柱など多様な形状のピンを用いてもよい。例えば、半円柱のピンを用いる場合、突出部７３ａの外面に半円柱のピンを設けることができる。ステータコア３２には、貫通穴３２ｃの内面に、ピンと噛み合う半円形の溝が設けられる。この構成でも、ステータ３１のための径方向位置と周方向位置との両方を規定する構造が提供される。また、ボディ穴９２およびコア穴９３、９９３の位置は、ピン９１の少なくとも一部を、固定ボルト３４のための貫通穴３２ｄの周方向延長上の環状範囲より内側または外側に位置させるように形成されてもよい。この構成は、貫通穴３２ｄへのピン９１の誤挿入を抑制する。ピン９１がステータコア３２に固定される場合、ボディ穴９２を幅ＲＷと幅ＣＷとが異なる穴によって提供してもよい。 In the above embodiment, a round bar 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. When the pin 91 is fixed to the stator core 32, the body hole 92 may be provided by holes having different widths RW and CW.

Claims (12)

  1. 　内燃機関（１２）の回転軸に連結されるロータコア（２２）の内面に、界磁を提供する永久磁石（２３）が配置されたロータ（２１）と、
    　前記内燃機関（１２）のボディ（１３）に固定されることによって前記ロータの内側に配置され、前記永久磁石と対向する複数の磁極（３２ａ）を径方向外側に形成するステータコア（３２）を有するステータ（３１）と、
    　前記ステータの径方向外側縁より径方向内側に配置され、前記ステータコアと前記ボディとを前記ステータの周方向に関して連結することにより、前記ボディに対する周方向に関する前記ステータコアの位置を規定する周方向連結部（８１）とを備えることを特徴とする内燃機関用回転電機。     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:
  2. 　さらに、前記ステータコアに形成され、前記ステータを前記ボディに固定するための固定ボルトを受け入れるための貫通穴（３２ｄ）を有し、
    　前記周方向連結部が許容する周方向に関する前記ステータコアの可動角度は、前記固定ボルトと前記貫通穴とが許容する前記ステータコアの可動角度より小さいことを特徴とする請求項１に記載の内燃機関用回転電機。     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.
  3. 　さらに、前記ステータの径方向外側縁より径方向内側に配置され、前記ステータコアと前記ボディとを前記ステータの径方向に関して連結することにより径方向に関する前記ステータコアの位置を規定する径方向連結部（７１）を備えることを特徴とする請求項１または請求項２に記載の内燃機関用回転電機。 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:
  4. 　前記径方向連結部は、
    　前記ステータコアと前記ボディとの一方に設けられ、筒状内面を提供する内胴部（７２ａ、７２ｂ、７２ｃ、７４ａ、７４ｂ、７４ｃ、７７）、および
    　前記ステータコアと前記ボディとの他方に設けられ、前記筒状内面に対向して位置する筒状外面を提供するとともに、前記内胴部の中に挿入される軸方向突出部（７３ａ、７３ｂ、７３ｃ、７５ａ、７５ｂ、７５ｃ、７６）を有することを特徴とする請求項３に記載の内燃機関用回転電機。     The radial connecting portion is
    An inner body (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.
  5. 　前記周方向連結部は、
    　前記軸方向突出部に形成され、前記軸方向突出部の周方向端部に第１の端面（８４）を形成する切欠部（８３ａ、８３ｂ、８３ｃ、８７ａ、８７ｂ、８７ｃ、８８）、および
    　前記筒状内面から径方向内側に向けて突出するように前記内胴部に設けられ、周方向の端部に第２の端面（８５）を形成し、前記切欠部の中に挿入される径方向突出部（８２ａ、８２ｂ、８３ｃ、８６ａ、８６ｂ、８６ｃ、８９）を有することを特徴とする請求項４に記載の内燃機関用回転電機。     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 protruding portion (82 a, 82 b, 83 c, 86 a, 86 b, 86 c, 89).
  6. 　前記切欠部と前記径方向突出部とは、前記ステータの中心に対して非対称に配置されていることを特徴とする請求項５に記載の内燃機関用回転電機。 The rotary electric 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.
  7. 　前記周方向連結部は、前記ステータコアと前記ボディとを凹部と凸部とにおいて直接的に噛み合わせることによって提供されていることを特徴とする請求項１から請求項６のいずれかに記載の内燃機関用回転電機。 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.
  8. 　前記周方向連結部は、
    　前記ボディに設けられたボディ穴（９２）と前記ステータコアに設けられたコア穴（９３、９９３）とに挿入されたピン（９１）を有することを特徴とする請求項１から請求項７のいずれかに記載の内燃機関用回転電機。     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.
  9. 　前記コア穴は、前記ステータの軸方向に関して底を有する非貫通穴であることを特徴とする請求項８に記載の内燃機関用回転電機。 The rotary electric 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.
  10. 　前記ステータの径方向における前記コア穴（９９３）の幅（ＲＷ）は、前記ステータの周方向における前記コア穴の幅（ＣＷ）より大きいことを特徴とする請求項８または請求項９に記載の内燃機関用回転電機。 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.
  11. 　前記周方向連結部は、
    　前記ステータの周方向における唯一の位置において前記ステータコアと前記ボディとの連結を許容する噛み合い部を有することを特徴とする請求項１から請求項１０のいずれかに記載の内燃機関用回転電機。     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.
  12. 　前記ステータは、前記ロータが所定の回転位置にあるときに点火制御用の信号を出力するための回転位置センサ（４３）を備えることを特徴とする請求項１から請求項１１のいずれかに記載の内燃機関用回転電機。 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.
PCT/JP2015/005781 2014-11-28 2015-11-19 Rotating electrical machine for internal combustion engine WO2016084352A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11168844A (en) * 1997-12-03 1999-06-22 Toshiba Corp Motor core and manufacture of motor core
JP2003264970A (en) * 2002-03-07 2003-09-19 Tokushu Denso Kk Rotating machine
JP2007166880A (en) * 2005-12-16 2007-06-28 Shinano Kenshi Co Ltd Dc brushless motor
JP2013233030A (en) * 2012-04-27 2013-11-14 Denso Trim Kk Starter generator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11168844A (en) * 1997-12-03 1999-06-22 Toshiba Corp Motor core and manufacture of motor core
JP2003264970A (en) * 2002-03-07 2003-09-19 Tokushu Denso Kk Rotating machine
JP2007166880A (en) * 2005-12-16 2007-06-28 Shinano Kenshi Co Ltd Dc brushless motor
JP2013233030A (en) * 2012-04-27 2013-11-14 Denso Trim Kk Starter generator

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