JP6112259B2 - Rotational position detector for internal combustion engine - Google Patents

Description

Cross-reference of related applications

  This application is based on Japanese Patent Application No. 2014-263126 filed on December 25, 2014, and the disclosure of the basic application is incorporated into this application by reference.

  The invention disclosed herein relates to a rotational position detection device for an 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). Patent Document 3 and Patent Document 4 disclose a configuration in which one bolt is used to fix the sensor unit to the stator core. 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.

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

  In the configuration described in Patent Document 3, only one portion on the radially inner side of the sensor unit is fixed to the stator core with bolts. Although the stator core and the sensor unit are engaged with each other by the finger-shaped sensor housing portion, the sensor unit may be displaced in the circumferential direction due to wear or deformation. Although patent document 4 has a protrusion part also in the both ends of the circumferential direction of a sensor unit, there is no description regarding those uses. And since the stator coil is provided in those positions, a sensor unit cannot be fixed to a stator core. Therefore, the sensor may not be held at a predetermined position due to the displacement of the sensor unit.

  In another aspect, the sensor unit described in Patent Literatures 1-4 includes a shallow container portion between a radially inner fixed portion and a radially outer finger-shaped sensor housing portion. The container part has a function as a container for storing electrical parts and a function for holding the sensor storage part in the axial direction. However, in the illustrated configuration, the shallow container portion may be deformed to warp. For example, the side wall and the bottom wall of the container part may be deformed so that the open end of the container part opens. The deformation of the shallow container portion causes the sensor housing portion to move in the axial direction, and thus there is a possibility that the sensor cannot be held in a predetermined position.

  In view of the above or other aspects not mentioned, there is a need for further improvements in the rotational position detection device for internal combustion engines.

  One of the objects of the invention is to provide a rotational position detecting device for an internal combustion engine that can accurately position a sensor at a specified position.

  Another object of the invention is to provide a rotational position detecting device for an internal combustion engine that can accurately position a sensor in the axial direction.

  Another object of the invention is to provide a rotational position detecting device for an internal combustion engine that can accurately position a sensor in the circumferential direction.

  Still another object of the present invention is to provide a rotational position detecting device for an internal combustion engine in which deformation affecting the position of the sensor is suppressed.

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

According to one disclosed invention, a rotational position detecting device for an internal combustion engine is provided. According to the present invention, an electric power indicating a rotational position of a rotor is detected by detecting a magnetic flux of a magnet (23) provided in a stator core (32) of a rotating electrical machine (10) interlocked with an internal combustion engine (12). In the rotational position detecting device for an internal combustion engine that outputs a signal, a sensor (43) that is disposed between two adjacent magnetic poles (32a) of the stator core and detects a magnetic flux change of the rotor, and the sensor and an electric connected to the sensor A case (51) for accommodating the circuit component (42), the case having a bottom wall (61) and a side wall (62-65) surrounding the bottom wall, and a container (52) for accommodating the electric circuit component; And at least one bolt hole (81, 82) that is disposed radially inward of the container and receives the fixing bolt (44), and is fastened and fixed to the stator core by the fixing bolt. A connecting portion (55, 255, 355, 455) provided between the tightening portion (54) and the inner wall (62) positioned radially inward of the side wall and the tightening portion to connect the inner wall and the tightening portion. 555, 655, 755, 855), and the connecting portion includes a first end connecting portion (84) for connecting one end portion in the circumferential direction of the inner wall and the fastening portion, and the other in the circumferential direction of the inner wall. Positioned between the second end connecting portion (85) for connecting the end portion and the tightening portion, and the first end connecting portion and the second end connecting portion in the circumferential center of the inner wall. And at least one intermediate connecting portion ( 86, 93e, 94e, 95, 98 ) for connecting the inner wall and the tightening portion.

  According to this invention, the container and the tightening portion are connected by the connecting portion. In addition to the 1st end part connection part and the 2nd end part connection part which were provided in the both ends, the connection part has the intermediate connection part positioned among them further. Since the intermediate connecting portion connects the inner wall and the tightening portion, the inner wall and the tightening portion are maintained in a predetermined positional relationship. As a result, the inner wall and the tightening portion are accurately positioned in a predetermined positional relationship. Therefore, the positional deviation between the inner wall and the tightening portion and the positional deviation of the sensor due to the change in the positional relation are suppressed.

One disclosed invention is to detect the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) linked to the internal combustion engine (12) and provided in the rotor (21). In a rotational position detecting device for an internal combustion engine that outputs an electrical signal indicating a rotational position, a sensor (43) that is disposed between two adjacent magnetic poles (32a) of a stator core and detects a change in magnetic flux of the rotor, a sensor, and a sensor And a case (51) for accommodating an electric circuit component (42) connected to the housing, the case having a bottom wall (61) and a side wall (62-65) surrounding the bottom wall, and accommodating the electric circuit component. The container (52) has at least one bolt hole (81, 82) disposed radially inward from the container and receiving the fixing bolt (44), and is fastened to the stator core by the fixing bolt. A fastening portion (54) to be attached and fixed, and a connecting portion (55, provided between the inner wall (62) located radially inside of the side wall and the fastening portion to connect the inner wall and the fastening portion (55, 255, 355, 455, 555, 655, 755, 855), and the bottom wall is provided at a central portion in the circumferential direction of the case, and extends radially above the bottom wall from the inner wall toward the radially outer side. It has a rib ( 74 ).

  According to this invention, the rib provided on the bottom wall of the container suppresses deformation of the container. Thereby, the position shift of the sensor due to the deformation of the container is suppressed.

One disclosed invention is to detect the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) linked to the internal combustion engine (12) and provided in the rotor (21). In a rotational position detecting device for an internal combustion engine that outputs an electrical signal indicating a rotational position, a sensor (43) that is disposed between two adjacent magnetic poles (32a) of a stator core and detects a change in magnetic flux of the rotor, a sensor, and a sensor And a case (51) for accommodating an electric circuit component (42) connected to the housing, the case having a bottom wall (61) and a side wall (62-65) surrounding the bottom wall, and accommodating the electric circuit component. The container (52) has two bolt holes (81, 82) arranged radially inward from the container in the circumferential direction, and is fixed by a fixing bolt (44) received in the bolt hole. A fastening part (54) fastened and fixed to the core, and a connecting part (55, 255, 355, 455, 555, 655) for connecting the fastening part and the inner wall (62) located radially inside of the side wall. , 755) and have a coupling portion is provided between the two bolt holes are positioned in the center of the circumferential direction of the inner wall, an intermediate connecting portion connecting the attached inner wall and fastening portions (86,93E, 94e, characterized in that it have a 95, 98).
One of the disclosed invention, the rotor by detecting the magnetic flux of the stator core magnet provided on the rotor (21) provided in the (32) (23) of the rotary electric machine (10) interlocked with the internal combustion engine (12) A rotational position detecting device for an internal combustion engine that outputs an electrical signal indicating the rotational position of the rotor, a sensor (43) disposed between two adjacent magnetic poles (32a) of the stator core for detecting a change in the magnetic flux of the rotor , a sensor, and A case (51 ) for housing an electric circuit component (42) connected to the sensor , the case having a bottom wall (61) and a side wall (62-65 ) surrounding the bottom wall , a housing for the container (52), disposed radially inward of the container, has two bolt holes for receiving fixing bolts (44) (81, 82), fastened to Ri by the fixing bolt stator core Are tightened (54) which is fixed, connecting portion for connecting the inner wall is provided with a clamping portion between the position to the inner wall (62) and the fastening portion radially inwardly of the side wall (55, 255 355, 455, 555, 655, 755, 855), and the connecting portion includes a first end connecting portion (84) for connecting one end portion in the circumferential direction of the inner wall and the tightening portion, and an inner wall Between the second end connecting portion (85) for connecting the other end portion in the circumferential direction and the tightening portion, and between the first end connecting portion and the second end connecting portion . positioned between one of the intermediate connecting portion is also a small connecting the inner wall and fastening portions (86,91,92,93e, 94e, 95,98) and having a.
One of the disclosed invention, the rotor by detecting the magnetic flux of the stator core magnet provided on the rotor (21) provided in the (32) (23) of the rotary electric machine (10) interlocked with the internal combustion engine (12) A rotational position detecting device for an internal combustion engine that outputs an electrical signal indicating the rotational position of the rotor, a sensor (43) disposed between two adjacent magnetic poles (32a) of the stator core for detecting a change in the magnetic flux of the rotor , a sensor, and A case (51 ) for housing an electric circuit component (42) connected to the sensor , the case having a bottom wall (61) and a side wall (62-65 ) surrounding the bottom wall , a housing for the container (52) has two bolt holes which are spaced apart in the radial direction inward of the container in the circumferential direction (81, 82), the fixing bolt to be received in bolt holes (44) stearyl Clamping portion to be clamped and fixed to the stator core (54), connecting portion for connecting the the clamping inner wall (62) located radially inwardly of the side wall (55,255, 355,455,555, 655, 755), and the connecting portion is positioned between the two bolt holes, and the intermediate connecting portions (86, 91, 92, 93e, 94e , 95, 98) connecting the inner wall and the fastening portion. ).

  According to the present invention, the case is fastened and fixed by the two bolt holes. Therefore, the case is firmly fixed in the axial direction. As a result, the positional deviation of the sensor is suppressed.

One disclosed invention is to detect the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) linked to the internal combustion engine (12) and provided in the rotor (21). In a rotational position detecting device for an internal combustion engine that outputs an electrical signal indicating a rotational position, a sensor (43) that is disposed between two adjacent magnetic poles (32a) of a stator core and detects a change in magnetic flux of the rotor, a sensor, and a sensor And a case (51) for accommodating an electric circuit component (42) connected to the housing, the case having a bottom wall (61) and a side wall (62-65) surrounding the bottom wall, and accommodating the electric circuit component. The container (52) has at least one bolt hole (81, 82) disposed radially inward from the container and receiving the fixing bolt (44), and is fastened to the stator core by the fixing bolt. A fastening portion (54) to be attached and fixed, and a connecting portion (55, provided between the inner wall (62) located radially inside of the side wall and the fastening portion to connect the inner wall and the fastening portion (55, and 255,355,455,555,655,755,855), provided on the inner surface of the bottom wall, circumferential rib extending along the circumferential direction (73), and / or, along the radius direction direction Extending radially outward ribs (74-76), a cover (53) extending from the outer surface of the bottom wall and containing the sensor, and provided radially inward from the cover, between the outer surface of the bottom wall and the cover And a plate-like reinforcing rib (53d) that spreads out.

  According to this invention, the cover extending to accommodate the sensor is reinforced by the reinforcing rib provided on the radially inner side. Therefore, deformation of the cover is suppressed, and displacement of the sensor is suppressed.

It is sectional drawing of the rotary electric machine for internal combustion engines which concerns on 1st Embodiment of invention. It is a top view which shows the stator and sensor unit of 1st Embodiment. It is a side view which shows the stator and sensor unit of 1st Embodiment. It is a top view of the case of 1st Embodiment. It is a bottom view of the case of a 1st embodiment. It is sectional drawing in the VI-VI line of the case of 1st Embodiment. It is sectional drawing in the VII-VII line of the case of 1st Embodiment. It is a perspective view of the case of 1st Embodiment. It is a perspective view of the case of 1st Embodiment. It is a perspective view of the case of 1st Embodiment. It is a perspective view of the case of 1st Embodiment. It is a perspective view of the case of 1st Embodiment. It is a top view of the case which concerns on 2nd Embodiment of invention. It is a perspective view of the case of 2nd Embodiment. It is a top view of the case which concerns on 3rd Embodiment of invention. It is a perspective view of the case of 3rd Embodiment. It is a top view of the case which concerns on 4th Embodiment of invention. It is a perspective view of the case of 4th Embodiment. It is a top view of the case which concerns on 5th Embodiment of invention. It is a perspective view of the case of 5th Embodiment. It is a top view of the case which concerns on 6th Embodiment of invention. It is a perspective view of the case of 6th Embodiment. It is a top view of a case concerning a 7th embodiment of the invention. It is a perspective view of the case of 7th Embodiment. It is a top view of the case which concerns on 8th Embodiment of invention. It is a perspective view of the case of 8th Embodiment.

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

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

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

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

  The rotating electrical machine 10 includes a rotor 21, a stator 31, and a sensor unit 41. The rotor 21 is a field element. The stator 31 is an armature. The entire rotor 21 is cup-shaped. The rotor 21 is positioned with its open end facing the body 13. The rotor 21 is fixed to the end of the rotating shaft 14. The rotor 21 and the rotating shaft 14 are connected via a positioning mechanism in the rotational direction such as key fitting. The rotor 21 is fixed by being fastened to the rotary shaft 14 by a fixing bolt 25. The rotor 21 rotates together with the rotating shaft 14. The rotor 21 provides a field by a permanent magnet.

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

  The rotor 21 has a permanent magnet 23 disposed on the inner surface of the rotor core 22. The permanent magnet 23 is fixed inside the outer cylinder. The permanent magnet 23 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.

  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 number of magnetic poles may be other numbers. The permanent magnet 23 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.

  FIG. 2 is a partial plan view including the stator 31 and the sensor unit 41. In FIG. 2, the cross-sectional position of FIG. 1 is indicated by the line II. FIG. 3 shows the radially outer side of the stator 31. 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. The stator 31 has, for example, 18 magnetic poles 32a. Other numbers may be sufficient as the number of the magnetic poles 32a. 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 gap 32b is also called a slot.

  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 that extends from the body 13. A boss | hub part is a cylindrical part. The boss portion is a metal member integrated with the body 13.

  As shown in FIG. 2, the stator core 32 defines a through hole 32 c for receiving the inner shaft of the rotating shaft 14 and the rotor core 22. Further, the stator core 32 has a plurality of through holes 32 d for receiving a plurality of fixing bolts 34. These through holes 32d contribute to defining the position of the stator core 32 in the circumferential direction. The stator core 32 has a through hole for receiving a fixing bolt 44 for fixing the sensor unit 41.

  The sensor unit 41 provides a rotational position detection device for an internal combustion engine. The sensor unit 41 is provided in the rotating electrical machine 10 that is linked to the internal combustion engine 12. The sensor unit 41 is provided on the stator core 32 of the rotating electrical machine 10. The sensor unit 41 outputs an electrical signal indicating the rotational position of the rotor 21 by detecting the magnetic flux of the permanent magnet 23 provided on the rotor 21.

    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 two adjacent magnetic poles 32a. The plurality of rotational position sensors 43 are arranged at predetermined positions in the gap 32b. In this embodiment, the circumferential direction of the stator core 32 is arranged at the center of the gap 32b. The plurality of rotational position sensors 43 detect the rotational position of the rotor 21 by detecting a change in 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. In this embodiment, they are arranged with an electrical angle of 120 deg from each other.

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

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

  The sensor unit 41 accommodates the electric circuit component 42. The electric circuit component 42 includes a substrate, an electric element mounted on the substrate, an electric wire, a part of the wiring 11a, and the like. 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 electric circuit component 42 and the rotational position sensor 43. The rotational position sensor 43 is connected to the electric 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 electric 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 electric circuit component 42 is accommodated in the container 52 and fixed.

  The case 51 contains at least one rotational position sensor 43 and has at least one cover 53 for supporting directly or indirectly. The rotational position sensor 43 is fixed at a predetermined position 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 outside the case 51 in the radial direction. The cover 53 is inserted into the gap 32b between the two magnetic poles 32a.

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

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

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

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

  The case 51 has a tightening portion 54. The tightening portion 54 is provided radially inward from the container 52 with respect to the radial direction of the rotating electrical machine 10. A connecting portion 55 is provided between the container 52 and the tightening portion 54 to connect them. The 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 electric circuit component 42.

  The sensor unit 41 has a wiring 11a for external connection for taking out a signal output from the rotational position sensor 43 to the outside. The wiring 11 a is connected to another electric circuit component 42. 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.

  4 to 12 show the shape of the case 51. In FIG. 6, some directions in the following description are indicated by arrows. A direction DF indicates one of deformation directions of the case 51. For example, when the open end of the container 52 expands or contracts along the direction DF, the case 51 warps. In this case, the position of the cover 53 may shift. The direction HT indicates the height direction. The direction HT corresponds to the axial direction. For example, the rib 74 shown in FIG. 6 is formed so as to be lower from the vicinity of the outer wall 63 to the vicinity of the center of the bottom wall 61, but gradually higher toward the inner wall 62 in the vicinity of the inner wall 62. The direction LT indicates the length direction. The direction LT corresponds to the radial direction. For example, the connecting portion 86 illustrated in FIG. 6 is one of connecting portions that are long in the length direction. The connecting portion 88 shown in FIG. 7 is one of connecting portions that are short in the length direction.

  A plurality of portions forming the case 51 are integrally formed of a continuous resin material. For example, the container 52, the cover 53, the fastening portion 54, and the connecting portion 55 are integrally formed of a continuous resin material. A plurality of ribs and connecting portions described later are also integrally formed of a resin material continuous from the container 52.

  The case 51 has a reinforcing rib 53 d for the cover 53. The reinforcing rib 53d is provided only on the cover 53 that extends the longest among the plurality of covers 53. The reinforcing rib 53 d is provided on the radially inner side from the cover 53. The reinforcing rib 53d has a plate shape with a thin thickness in the circumferential direction. The reinforcing rib 53 d has a plate shape extending between the bottom wall 61 and the cover 53. The reinforcing rib 53d extends from the cover 53 toward the inside in the radial direction. The reinforcing rib 53 d extends from the outer surface of the bottom wall 61 radially inward of the cover 53 so as to gradually increase toward the tip of the cover 53 as it approaches the cover 53. The rib 53d is stretched so as to spread between a radially elongated region on the radially inner side of the cover 53 and a radially elongated region on the outer surface of the bottom wall 61. The reinforcing rib 53d is a triangle having the two elongated regions as two adjacent sides.

  The reinforcing rib 53d is in contact with the cover 53. The contact between the reinforcing rib 53d and the cover 53 extends over the entire length of the cover 53 along the length direction of the cover 53, that is, the axial direction. The reinforcing rib 53d is in contact with the bottom wall 61. The contact between the reinforcing rib 53d and the bottom wall 61 extends along a radial direction over a range longer than the radial width of the cover 53.

  The reinforcing rib 53d is disposed in a gap between two adjacent magnetic poles 32a, that is, between two adjacent coils. The reinforcing rib 53d suppresses deformation of the bottom wall 61. The reinforcing rib 53d suppresses deformation of the cover 53. The reinforcing rib 53d contributes to maintain the relative relationship between the cover 53 and the bottom wall 61.

  In FIG. 4, the container 52 is partitioned by a plurality of walls 61-65. The plurality of walls 61-65 are plate-shaped. The container 52 provides a flat container having one end, that is, an end surface facing the body 13 opened. The container 52 has a bottom wall 61 that extends in a fan shape. The bottom wall 61 extends over a range including the installation position of the rotational position sensor 43. In this embodiment, the bottom wall 61 is a radially outer side surface of the stator 31 and extends in a range that can be called a circular arc shape or a fan shape in the circumferential direction. The container 52 has side walls 62-65 that surround the bottom wall 61. The side walls 62-65 include an inner wall 62, an outer wall 63, a first side wall 64, and a second side wall 65. The side walls 62-65 extend from the bottom wall 61 so as to have a predetermined height along the axial direction. The inner wall 62 is located on the radially inner side. The inner wall 62 extends in an arc shape along the circumferential direction. The outer wall 63 is located on the radially outer side. The outer wall 63 extends in a polygonal shape along the radially outer edge of the stator core 32. The first side wall 64 extends so as to connect the inner wall 62 and the outer wall 63. The radially inner portion of the first side wall 64 extends along the radial direction. The second side wall 65 extends so as to connect the inner wall 62 and the outer wall 63. The radially inner portion of the second side wall 65 extends along the radial direction. The second side wall 65 is provided with a notch for passing the wiring 11a.

  The container 52 has support protrusions 71 and 72 provided on the inner surface of the bottom wall 61. The support protrusions 71 and 72 are provided by columns formed so as to extend from the bottom wall 61. The support protrusions 71 and 72 are in contact with the electric circuit component 42 and support the electric circuit component 42 in the container 52. The support protrusions 71 and 72 allow the sealing resin 56 to flow so that the electric circuit component 42 is wrapped. The support protrusions 71 and 72 are distributed on the bottom wall 61. The support protrusions 71 and 72 are cylindrical. Support protrusions 71, 72 are lower than walls 62-65. A connecting portion for connecting to the electric circuit component 42 can be provided at the tips of the support protrusions 71 and 72. For example, an elastic deformation part for snap-fit or a hole for receiving a machine screw can be provided.

  The container 52 has a plurality of ribs 73-76 provided on the inner surface of the bottom wall 61. The ribs 73 to 76 protrude from the bottom wall 61 in the axial direction, and are formed to be elongated on the inner surface of the bottom wall 61. The plurality of ribs 73-76 are lower than the plurality of side walls 62-65. The plurality of ribs 73-76 are lower than the support protrusions 71, 72 in the vicinity of the support protrusions 71, 72 and at positions away from the plurality of side walls 62-65. The plurality of ribs 73-76 are in contact with the plurality of side walls 62-65. The plurality of ribs 73-76 extend so as to follow the expansion of the walls in the vicinity of the plurality of side walls 62-65. The plurality of ribs 73-76 suppress deformation of the container 52.

  The container 52 has a circumferential rib 73. The circumferential rib 73 extends along the circumferential direction between the first side wall 64 and the second side wall 65. The circumferential rib 73 extends along the outer wall 63. The circumferential rib 73 is in contact with the first side wall 64 and the second side wall 65. The circumferential rib 73 extends so as to pass through the support protrusions 71 and 72. In other words, the circumferential rib 73 is formed to extend between the first side wall 64 and the support protrusion 71, between the support protrusion 71 and the support protrusion 72, and between the support protrusion 72 and the second side wall 65. ing. The circumferential rib 73 is lower than the support protrusion 71. The circumferential rib 73 suppresses deformation of the bottom wall 61 in the circumferential direction.

  The container 52 has a plurality of radial ribs 74, 75, 76. The plurality of radial ribs 74, 75, 76 extend between the inner wall 62 and the outer wall 63. The plurality of radial ribs 74, 75, and 76 extend along the radial direction on the bottom wall. Note that the plurality of radial ribs 74, 75, and 76 do not need to extend accurately in the radial direction. For example, the plurality of radial ribs 74, 75, 76 may extend slightly inclined with respect to the radial direction.

  The plurality of radial ribs 74, 75, 76 extend in the axial direction and the circumferential direction so as to follow the expansion of the inner wall 62 at a portion in contact with the inner wall 62. The plurality of radial ribs 74, 75, 76 are larger at the portion in contact with the inner wall 62 than at the portion in which the other rib is in contact with the wall. The plurality of radial ribs 74, 75, 76 extend in the height direction at a portion in contact with the inner wall 62. The plurality of radial ribs 74, 75, 76 are formed so as to be along the inner wall 62 closer to the inner wall 62 in the vicinity of the inner wall 62. The radial ribs 74, 75, and 76 are gradually formed higher toward the inner wall 62 in the vicinity of the inner wall 62. The plurality of radial ribs 74, 75, 76 extend in the width direction, that is, in the circumferential direction, at a portion in contact with the inner wall 62. The plurality of radial ribs 74, 75, 76 enhance the rigidity of the bottom wall 61 and the inner wall 62. Further, the plurality of radial ribs 74, 75, and 76 contribute to maintaining the bottom wall 61 and the inner wall 62 in a predetermined positional relationship.

  The container 52 has a first radial rib 74. The first radial rib 74 extends along a diameter passing through the center in the circumferential direction of the container 52. The container 52 has a second radial rib 75. The second radial rib 75 extends along a diameter passing through a bolt hole 81 described later. The second radial rib 75 extends so as to pass through the support protrusion 71. The container 52 has a third radial rib 76. The third radial rib 76 extends along a diameter passing through a bolt hole 82 described later. The third radial rib 76 extends so as to pass through the support protrusion 72. The second radial rib 75 and the third radial rib 76 are lower than the support protrusions 71 and 72 in the vicinity of the support protrusions 71 and 72. The radial ribs 74, 75, 76 suppress deformation of the bottom wall 61 in the radial direction.

  The tightening portion 54 is disposed radially inward from the container 52. The tightening portion 54 has two bolt holes 81 and 82 for receiving the two fixing bolts 44. The two bolt holes 81 and 82 are arranged in the circumferential direction. The two bolt holes 81 and 82 are located on the same circumference on the stator 31. The two bolt holes 81, 82 are arranged apart from each other in the circumferential direction on the fan-shaped tightening portion 54. The tightening portion 54 is fastened and fixed to the stator core 32 by two fixing bolts 44.

  As shown in FIG. 2, the two bolt holes 81 and 82 are arranged so that the sensor unit 41 is positioned between the two through holes 32 d provided in the stator core 32. The two bolt holes 81 and 82 are arranged so as to avoid interference between the fixing bolt 44 on the stator 31 and other parts. These bolt holes 81 and 82 are provided by embedded nuts 81 a and 82 a fixed to the resin material forming the case 51. The buried nuts 81a and 82a are fixed by a technique such as insert molding, press fitting, and screwing.

  Returning to FIG. 4, the container 52 and the fastening portion 54 are connected by a connecting portion 55. The connecting portion 55 is provided between the inner wall 62 located on the radially inner side of the plurality of side walls and the tightening portion 54, and connects the inner wall 62 and the tightening portion 54. The connecting portion 55 has a plurality of portions 83-88. The plurality of portions 83-88 are plate-like portions. The plate-like portion contributes to suppress deformation due to the shrinkage of the resin material. Further, the plate-like portion enables a small amount of resin material. Further, the plate-like portion contributes to increase the rigidity related to a specific direction required for the sensor unit 41.

  The connecting portion 55 has a bottom connecting portion 83. The bottom connecting portion 83 is a plate-like portion that extends radially inward from the bottom wall 61. The bottom connecting portion 83 extends so as to cross the axial direction and along the radial direction. The bottom connecting portion 83 extends so as not to form an axial communication opening between the container 52 and the tightening portion 54.

  As shown in FIGS. 6, 7, and 8, the inner wall 62, the bottom connecting portion 83, and the fastening portion 54 have a surface 62 a that extends at an angle so as to connect the container 52 and the fastening portion 54. providing. The surface 62 a is formed to extend from the inner wall 62 toward the fastening portion 54. The surface 62a is a concave curved surface. The surface 62a smoothly connects the radially inner surface of the inner wall 62 and the upper surface of the tightening portion 54 in the axial direction.

  Returning to FIG. 4, the connecting portion 55 has a plurality of plate-like connecting portions 84-88. The plate-like connecting portions 84-88 are thin plate-like in the circumferential direction. The plurality of plate-like connecting portions 84-88 are arranged away from each other in the circumferential direction. The plurality of plate-like connecting portions 84-88 are stretched so as to spread between an elongated range extending in the axial direction outside the inner wall 62 and an elongated range extending radially on the fastening portion 54. .

  The plurality of plate-like connecting portions 84-88 form a groove portion therebetween. In this embodiment, a groove is defined between the first end connecting portion 84 and the second intermediate connecting portion 87 and between the second end connecting portion 85 and the third intermediate connecting portion 88. . Further, a groove is also defined between the first intermediate connecting portion 86 and the second intermediate connecting portion 87 and between the first intermediate connecting portion 86 and the third intermediate connecting portion 88. The bottom surface of the groove portion is provided by an inclined surface 62 a extending between the inner wall 62 and the tightening portion 54. The plurality of plate-like connecting portions 84-88 enhance the rigidity of the inner wall 62. The plurality of plate-like connecting portions 84-88 increase the rigidity of the tightening portion 54. Further, the plurality of plate-like connecting portions 84-88 contribute to maintaining the tightening portion 54 and the inner wall 62 in a predetermined positional relationship.

  As shown in FIGS. 4 to 12, the connecting portion 55 includes a first end connecting portion 84 and a second end connecting portion 85. The first end connecting portion 84 connects one end portion in the circumferential direction of the inner wall 62 and the tightening portion 54. The second end connecting portion 85 connects the other end portion of the inner wall 62 in the circumferential direction and the fastening portion 54. The first end connecting portion 84 and the second end connecting portion 85 are located at both ends in the circumferential direction of the connecting portion 55. The first end connecting portion 84 and the second end connecting portion 85 are high connecting portions having the same height as the upper end of the inner wall 62. The first end connecting portion 84 and the second end connecting portion 85 are long connecting portions that extend inward from the bolt holes 81 and 82 and reach the radially inner end of the tightening portion 54. The first end connecting portion 84 is located on the extension of the first side wall 64. The first end connecting portion 84 extends radially inward from a corner formed by the inner wall 62 and the first side wall 64. The second end connecting portion 85 is located on the extension of the second side wall 65. The second end connecting portion 85 extends radially inward from a corner formed by the inner wall 62 and the second side wall 65.

  The first end connecting portion 84 is in contact with the inner wall 62 and the first side wall 64 in an elongated range throughout the height direction of the container 52. The second end connecting portion 85 is in contact with the inner wall 62 and the second side wall 65 in an elongated range throughout the height direction of the container 52. The first end connecting portion 84 and the second end connecting portion 85 are in contact with the tightening portion 54 in an elongated range over the entire length of the tightening portion 54 in the radial direction. The first end connecting portion 84 and the second end connecting portion 85 are in contact with the bottom connecting portion 83 in an elongated range over the entire length of the bottom connecting portion 83 in the radial direction.

  The first end connecting portion 84 and the second end connecting portion 85 extend at least in a triangular range in which two adjacent sides are in contact with the inner wall 62 and the tightening portion 54. The 1st end part connection part 84 and the 2nd end part connection part 85 have spread so that it may become a convex shape rather than the range of the said triangle.

  As illustrated in FIGS. 4 to 12, the connecting portion 55 includes a plurality of intermediate connecting portions 86 to 88. The intermediate connecting portions 86-88 are positioned between the first end connecting portion 84 and the second end connecting portion 85. The intermediate connecting portions 86-88 connect the inner wall 62 and the tightening portion 54. The intermediate connecting portions 86-88 extend from the inner wall 62 in the vicinity of the opening end of the container 52 toward the tightening portion 54.

  Since the first intermediate connecting portion 86 is located at the center, it is also called a central intermediate connecting portion. The first intermediate connecting portion 86 is a high connecting portion having the same height as the upper end of the inner wall 62. The first intermediate connecting portion 86 is a long connecting portion that extends radially inward from the bolt holes 81 and 82 and reaches the radially inner end of the tightening portion 54. The first intermediate connecting portion 86 is located between the two bolt holes 81 and 82. The first intermediate connecting portion 86 extends from the center in the circumferential direction of the inner wall 62 toward the inside in the radial direction. The contact portion between the first intermediate connecting portion 86 and the inner wall 62 corresponds to the radially outer side of the contact portion between the first radial rib 74 and the inner wall 62. The first intermediate connecting portion 86 is located on the extension of the first radial rib 74. In other words, the first radial rib 74 extends on the bottom wall 61 from the position corresponding to the first intermediate connecting portion 86 toward the radially outer side.

  The first intermediate connecting portion 86 is in contact with the inner wall 62 in an elongated range over the entire height direction of the container 52. The first intermediate connecting portion 86 is in contact with the tightening portion 54 in an elongated range over the entire radial direction of the tightening portion 54. The first intermediate connecting portion 86 is in contact with the bottom connecting portion 83 in an elongated range over the entire length of the bottom connecting portion 83 in the radial direction.

  The first intermediate connecting portion 86 extends at least in a triangular range in which two adjacent sides are in contact with the inner wall 62 and the tightening portion 54. The first intermediate connecting portion 86 extends so as to be slightly convex from the range of the triangle.

  The second intermediate connecting portion 87 and the third intermediate connecting portion 88 are located between the high and long connecting portions 84, 85, 86 and are also called auxiliary connecting portions because they are smaller than them. The second intermediate connecting portion 87 and the third intermediate connecting portion 88 can also be called ribs that mainly reinforce the inner wall 62 from the radially inner side. The second intermediate connecting portion 87 and the third intermediate connecting portion 88 are high connecting portions having the same height as the upper end of the inner wall 62. The second intermediate connecting portion 87 and the third intermediate connecting portion 88 are short connecting portions that do not reach the radially inner end of the tightening portion 54. The second intermediate connection portion 87 and the third intermediate connection portion 88 are short connection portions that extend outward from the bolt holes 81 and 82. The second intermediate connecting portion 87 and the third intermediate connecting portion 88 are terminated on the radially outer side from the bolt holes 81 and 82.

  The second intermediate connecting portion 87 is located on the radially outer side from the bolt hole 81. The second intermediate connecting portion 87 is located between the first end connecting portion 84 and the first intermediate connecting portion 86. The second intermediate connecting portion 87 extends radially inward from the inner wall 62. The contact portion between the second intermediate connecting portion 87 and the inner wall 62 corresponds to the radially outer side of the contact portion between the second radial rib 75 and the inner wall 62. The second intermediate connecting portion 87 is located on the extension of the second radial rib 75. In other words, the second radial rib 75 extends on the bottom wall 61 from the position corresponding to the second intermediate connecting portion 87 toward the radially outer side.

  The third intermediate connecting portion 88 is located on the radially outer side of the bolt hole 82. The third intermediate connecting portion 88 is located between the second end connecting portion 85 and the first intermediate connecting portion 86. The third intermediate connecting portion 88 extends radially inward from the inner wall 62. The contact portion between the third intermediate connecting portion 88 and the inner wall 62 corresponds to the radially outer side of the contact portion between the third radial rib 76 and the inner wall 62. The third intermediate connecting portion 88 is located on the extension of the third radial rib 76. In other words, the third radial rib 76 extends on the bottom wall 61 from the position corresponding to the third intermediate connecting portion 88 toward the radially outer side.

  The second intermediate connecting portion 87 and the third intermediate connecting portion 88 are in contact with the inner wall 62 throughout the height direction of the container 52. The second intermediate connecting portion 87 and the third intermediate connecting portion 88 are in contact with the tightening portion 54 only at the radially inner portion of the tightening portion 54. The second intermediate connecting portion 87 and the third intermediate connecting portion 88 are in contact with the bottom connecting portion 83 over the entire length of the bottom connecting portion 83 in the radial direction.

  Returning to FIG. 4, the electric circuit component 42 occupies a radially outer range in the container 52. A sufficiently large gap for laying wiring and the like is formed between the electric circuit component 42 and the inner wall 62. The plurality of radial ribs 74 to 76 are formed so as to approach the inner wall 62 in the vicinity of the inner wall 62. Interference between the radial ribs 74-76 and the electric circuit component 42 is avoided.

  As shown in FIG. 6, the first intermediate connecting portion 86 and the first radial rib 74 are disposed on the same diameter. Thereby, the fall of the inner wall 62 is suppressed with respect to the deformation direction DF. Moreover, since the first intermediate connecting portion 86 is in contact with the entire tightening portion 54, the tightening portion 54 and the inner wall 62 are maintained in the illustrated positional relationship. As shown in FIG. 7, the third intermediate connecting portion 88 and the third radial rib 76 are disposed on the same diameter. Thereby, the fall of the inner wall 62 is suppressed with respect to the deformation direction DF. As shown in FIG. 8, the intermediate coupling portions 86-88 are formed so as to gradually spread toward the inner wall 62 at the contact portion with the inner wall 62. Further, the intermediate connecting portions 86-88 are formed so as to gradually spread toward the tightening portion 54 at the contact portion with the tightening portion 54. 9 and 10, the shape of the radial ribs 74-76 that gradually spread toward the inner wall 62 appears well. 11 and 12 clearly show the difference in height between the four covers 53.

  According to this embodiment, plate-like connecting portions 84-88 are provided between the container 52 and the tightening portion 54. Since the intermediate connecting portions 86-88 connect the inner wall 62 and the tightening portion 54, the inner wall 62 and the tightening portion 54 are maintained in a predetermined positional relationship. As a result, the inner wall 62 and the tightening portion 54 are accurately positioned in a predetermined positional relationship. Therefore, an error in the positional relationship between the inner wall 62 and the fastening portion 54 and a positional shift of the rotational position sensor 43 due to a change in the positional relationship are suppressed. Further, the plate-like connecting portions 84-88 suppress deformation of the case 51 that affects the position of the rotational position sensor 43. Further, the deformation of the sealing resin 56 due to the deformation of the case 51 is suppressed. As a result, the displacement of the electric circuit component 42 due to deformation of other parts is suppressed, so that the rotational position sensor 43 can be accurately positioned at a specified position.

  The first intermediate connecting portion 86 is provided at a central portion in the circumferential direction of the fan-shaped case 51. The first intermediate connecting portion 86 suppresses deformation of the case 51 in the deformation direction DF. The first radial rib 74 is provided at the center of the sector case 51 in the circumferential direction. Moreover, the axial height of the first radial rib 74 from the bottom wall 61 is set gradually higher toward the inner wall 62. The first radial rib 74 suppresses deformation of the case 51 in the deformation direction DF. Furthermore, the first radial rib 74 and the first intermediate connecting portion 86 are positioned on both sides in the radial direction of the inner wall 62. Thereby, the deformation of the case 51 is suppressed in the deformation direction DF.

  The manufacturing method of the rotating electrical machine 10 includes a step of resin molding the case 51. In this step, the resin material is supplied into a mold that defines a cavity corresponding to the case 51. For example, the resin material is supplied into the mold from a gate provided at the gate position GT illustrated in FIG. The resin material spreads from the gate position GT into the cavity and flows while gradually filling the cavity. The tip of the resin material meets again at a predetermined position in the cavity. At this time, the resin material forms a boundary called a weld and remains as a trace even after the resin material is cured. The resin material is fused in the weld, but the strength may be low in the vicinity of the weld due to the low continuity of the filler contained in the resin material. In this embodiment, the symmetry axis of the case 51 is located between the two bolt holes 81 and 82, and the gate position GT is located in the vicinity of the symmetry axis. For this reason, a weld may occur between the two bolt holes 81 and 82. Since the rotational torque in the opposite direction acts by the bolts around the two bolt holes 81 and 82, the low strength in the weld may cause the fastening portion 54 to be broken. According to this embodiment, the first intermediate connecting portion 86 is located between the two bolt holes 81 and 82. The first intermediate connecting portion 86 reinforces the space between the two bolt holes 81 and 82. That is, the first intermediate connecting portion 86 provides a member that counters the rotational torque around the two bolt holes 81 and 82. Further, the first intermediate connecting part 86 complicates the shape of the weld and improves the strength of the resin material in the weld. Thus, the 1st intermediate | middle connection part 86 contributes also to the intensity | strength improvement of the resin material in a weld.

  According to this embodiment, the ribs 73-76 are provided on the bottom wall 61 of the container 52. The ribs 73-76 suppress deformation of the case 51 that affects the position of the rotational position sensor 43. As a result, the rotational position sensor 43 is accurately positioned at a specified position.

The support protrusions 71 and 72 extend into the container 52 so as to support the electric circuit component 42. The support protrusions 71 and 72 are provided at intersections between the circumferential rib 73 and the radial ribs 75 and 76 . This arrangement suppresses deformation and distortion of the case 51 due to the support protrusions 71 and 72. As a result, the support protrusions 71 and 72 stably support the electric circuit component. Further, the positional accuracy of the rotational position sensor 43 is improved. The circumferential rib 73 and the radial ribs 74, 75, 76 extend from the bottom wall 61 into the container 52. Further, the circumferential rib 73 and the radial ribs 74, 75, 76 are lower than the support protrusions 71, 72 in the vicinity of the support protrusions 71, 72. Thereby, the inflow of the sealing resin 56 between the electric circuit component 42 and the bottom wall 61 is promoted.

  The support protrusions 71 and 72 and the ribs 73 to 76 increase the adhesion area between the bottom wall 61 and the sealing resin 56. Thereby, adhesive strength improves. Further, the ribs 73 to 76 may guide the flow of the sealing resin 56 in the process of injecting the sealing resin 56. In this case, the sealing resin 56 can be supplied to the required position. The ribs 73-76 suppress deformation of the case 51 due to expansion or contraction of the sealing resin 56. For example, the ribs 73 to 76 suppress the deformation of the case 51 in the process of hardening the sealing resin 56. Each of the ribs 74 to 76 is disposed between the plurality of covers 53 in the circumferential direction of the case 51. When the bottom wall 61 between the plurality of covers 53 tries to deform in the circumferential direction, a force in the twisting direction acts on each of the ribs 74 to 76. The ribs 74 to 76 suppress deformation of the bottom wall 61 due to the rigidity in the torsional direction. As a result, a change in the interval between the plurality of covers 53 is suppressed.

  In an environment where the rotating electrical machine 10 is used, each part of the rotating electrical machine 10 may expand and contract. For example, in winter, the stator core 32 and the case 53 contract due to low temperatures. At the same time, the sealing resin 56 contracts. In addition, the resin material forming the component may contract due to a decrease in humidity. In these cases, peeling may occur between the case 51 and the sealing resin 56. The enhanced adhesive strength in this embodiment suppresses delamination. Moreover, since the deformation | transformation of the direction which the opening end of case 51 opens is suppressed, peeling in an opening end is suppressed.

  For example, the contraction of the member due to the low temperature described above may loosen the engagement between the stator core 32 and the case 53. In this case, noise may increase because the position of the rotational position sensor 43 is shifted in the axial direction due to vibration of the internal combustion engine. Further, the cover 53 may be damaged. The connecting portion 83-88 and the rib 73-76 of this embodiment position the container 52 and the tightening portion 54 in a predetermined positional relationship, and suppress warpage and amplitude of the container 52. Therefore, the deformation | transformation which the inner wall 62 falls to the inner side or outer side of radial direction is suppressed. As a result, the positional deviation of the cover 53 in the axial direction is suppressed. Therefore, the rotational position sensor 43 is accurately positioned at a specified position in the axial direction.

  According to this embodiment, the fixing bolt 44 is received in each of the two bolt holes 81 and 82, and the fastening portion 54 is fastened and fixed to the stator 31. Accordingly, the case 51 is firmly fixed in the axial direction. In addition, the case 51 is accurately fixed at a predetermined position in the circumferential direction. Positional displacement and movement of the sensor unit 41 in the circumferential direction are suppressed. As a result, the rotational position sensor 43 can be accurately positioned at a specified position in the circumferential direction.

  As shown in FIG. 5, the reinforcing rib 53 d is provided only on the longest cover 53. The cover 53 houses a rotational position sensor for an ignition signal. According to this embodiment, since the reinforcing rib 53 d is provided on the cover 53, deformation of the cover 53 that affects the position of the rotational position sensor 43 is suppressed. As a result, the rotational position sensor 43 can be accurately positioned at a specified position in the radial direction.

  The reinforcing rib 53d has a radial height from the radially inner surface of the cover 53 toward the radially inner side. The radial height gradually decreases from the bottom wall 61 toward the tip of the cover 53. The oblique side of the reinforcing rib 53d facilitates the arrangement of the reinforcing rib 53d between two adjacent coils.

  The manufacturing method of the rotating electrical machine 10 includes a step of resin molding the case 51. The cover 53 and the reinforcing rib 53d are molded by pouring a resin material into a mold. The gap of the mold for molding the reinforcing rib 53d provides an additional passage for supplying the resin material to the gap of the mold for molding the cover 53. Thereby, the inflow of the resin material into the narrow gap for molding the cover 53 is promoted. Differences in resin flow in the plurality of covers 53 having different lengths are suppressed. Thereby, the difference in the moldability of the plurality of covers 53 is suppressed. As a result, the shape accuracy and position accuracy of the plurality of covers 53 are improved.

  The method for manufacturing the rotating electrical machine 10 includes a step of attaching the case 51 to the stator core 32. The case 51 includes a step of first inserting the longest cover 53 into the stator core 32 and a step of inserting another short cover 53 into the stator core 32 thereafter. The longest cover 53 allows rough positioning. Moreover, the said process enables the deformation | transformation of several cover 53, and suppression of position shift. In the above process, the longest cover 53 is temporarily engaged with the stator core 32 alone. The reinforcing ribs 53d give appropriate strength to the longest cover 53 that is required to have higher strength than the other covers 53. The plurality of covers 53 are assembled to the stator core 32 while absorbing deformation and distortion of the case 51. Since the reinforcing rib 53d is provided only in the longest cover 53, the deformation of the other cover 53 is allowed while giving an appropriate strength to the longest cover 53.

(Second Embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the second intermediate connecting portion 87 and the third intermediate connecting portion 88 are provided. Instead, in this embodiment, the second intermediate connecting portion 87 and the third intermediate connecting portion 88 are not provided.

  As illustrated in FIGS. 13 and 14, the case 51 has a connecting portion 255. The connecting portion 255 does not include the second intermediate connecting portion 87 and the third intermediate connecting portion 88. Also in this embodiment, since the first intermediate connecting portion 86 is provided, the same effect as that of the preceding embodiment can be obtained.

(Third embodiment)
This embodiment is a modification based on the preceding embodiment. In the said embodiment, the 1st intermediate | middle connection part 86 is provided in the center. Instead, in this embodiment, two intermediate connecting portions 91 and 92 are provided.

  As shown in FIGS. 15 and 16, the case 51 has a connecting portion 355. The connecting portion 355 has a first intermediate connecting portion 91 and a second intermediate connecting portion 92. The 1st intermediate | middle connection part 91 and the 2nd intermediate | middle connection part 92 are located between the two bolt holes 81 and 82 regarding the circumferential direction. The first intermediate connecting portion 91 and the second intermediate connecting portion 92 are positioned at positions corresponding to both sides of the first radial rib 74 in the circumferential direction. The first intermediate connecting portion 91 and the second intermediate connecting portion 92 do not reach the radially inner end of the tightening portion 54, but have an intermediate length that reaches the circumferential gap between the two bolt holes 81 and 82. It is a connecting part.

  The first intermediate connecting portion 91 and the second intermediate connecting portion 92 provide a strong connection between the inner wall 62 and the tightening portion 54. Also in this embodiment, since the plurality of intermediate coupling portions 91 and 92 are provided, the same operation and effect as the preceding embodiment can be obtained.

(Fourth embodiment)
This embodiment is a modification based on the preceding embodiment. In the said embodiment, the plate-shaped connection part is provided. Instead, in this embodiment, a block-shaped connecting portion 93 is provided.

  As shown in FIGS. 17 and 18, the case 51 has a connecting portion 455. The connecting part 455 has a block-like connecting part 93. The block connecting portion 93 is formed so as to fill a space between the inner wall 62 and the tightening portion 54. The block-shaped connecting portion 93 provides a triangular cross section in which the inner wall 62 and the tightening portion 54 are positioned on two adjacent sides. The block-shaped connecting portion 93 provides a surface that is inclined from the upper end of the inner wall 62 toward the radially inner end of the tightening portion 54. This surface is a slightly convex curved surface. The block-shaped connecting portion 93 is provided with circular holes 93 a and 93 b for forming bolt holes 81 and 82.

  The block-shaped connecting portion 93 provides a plurality of portions that connect the inner wall 62 and the tightening portion 54. The block-shaped connecting portion 93 provides a bottom connecting portion 83. The block-shaped connecting portion 93 provides a first end connecting portion 93c and a second end connecting portion 93d at the end in the circumferential direction. Further, the block-like connecting portion 93 provides an intermediate connecting portion 93e located between the two circular holes 93a and 93b. Also in this embodiment, the intermediate coupling portion 93e provided by the block-shaped coupling portion 93 contributes to maintain the inner wall 62 and the tightening portion 54 in a predetermined positional relationship.

(Fifth embodiment)
This embodiment is a modification based on the preceding embodiment. In the said embodiment, case 51 has a block-shaped connection part which provides a triangular cross section. Instead, in this embodiment, a block-shaped connecting portion 94 that provides a square cross section is provided.

  As shown in FIGS. 19 and 20, the case 51 has a connecting portion 555. The connecting portion 555 has a block-like connecting portion 94. The block-shaped connecting portion 94 provides a square cross section in which the inner wall 62 and the tightening portion 54 are positioned on two adjacent sides. The block-shaped connecting portion 94 is provided with circular holes 94a, 94b for forming bolt holes 81, 82.

  The block-shaped connecting portion 94 provides a plurality of portions that connect the inner wall 62 and the tightening portion 54. The block-like connecting portion 94 provides a bottom connecting portion 83. The block-shaped connecting portion 94 provides a first end connecting portion 94c and a second end connecting portion 94d at the end in the circumferential direction. Further, the block-like connecting portion 94 provides an intermediate connecting portion 94e positioned between the two circular holes 94a and 94b. Also in this embodiment, the intermediate coupling portion 94e provided by the block-shaped coupling portion 94 contributes to maintain the inner wall 62 and the tightening portion 54 in a predetermined positional relationship.

(Sixth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the case 51 has a high intermediate connecting portion. Instead, in this embodiment, a low intermediate connecting portion 95 is provided.

  As shown in FIGS. 21 and 22, the case 51 has a connecting portion 655. The connecting portion 655 has an intermediate connecting portion 95. The intermediate connecting portion 95 is located between the two bolt holes 81 and 82. The intermediate connecting portion 95 is positioned on the extension of the first radial rib 74. The intermediate connecting portion 95 is a long connecting portion that reaches the radially inner end of the tightening portion 54. The intermediate connecting portion 95 is a low connecting portion that does not reach the upper end of the inner wall 62. The intermediate connecting portion 95 has a height corresponding to the first radial rib 74. The intermediate connection part 95 reinforces the connection between the inner wall 62 and the tightening part 54.

(Seventh embodiment)
This embodiment is a modification based on the preceding embodiment. In the said embodiment, case 51 has an intermediate | middle connection part. Instead, this embodiment does not include an intermediate connecting portion.

  As shown in FIGS. 23 and 24, the case 51 has a connecting portion 755. The connecting portion 755 has a first end connecting portion 84 and a second end connecting portion 85. The connecting portion 755 does not include an intermediate connecting portion.

  Also in this embodiment, two bolt holes 81 and 82 are provided in the tightening portion 54. When the fixing bolt 44 is received in each of the two bolt holes 81 and 82, the fastening portion 54 is fastened and fixed to the stator 31. Accordingly, the displacement and movement of the sensor unit 41 in the circumferential direction are suppressed. As a result, the rotational position sensor 43 is accurately positioned at a specified position in the circumferential direction. According to this embodiment, since the reinforcing rib 53d is provided on the cover 53, deformation of the cover 53 that adversely affects the position of the rotational position sensor 43 is suppressed.

(Eighth embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the case 51 has two bolt holes 81 and 82. Instead, in this embodiment, a single bolt hole 81 is employed.

  As shown in FIGS. 25 and 26, the tightening portion 54 has a single bolt hole 81. The bolt hole 81 is provided at the center in the circumferential direction of the case 51 and the tightening portion 54.

  The case 51 has a connecting portion 855. The connecting portion 855 includes a first intermediate connecting portion 96, a second intermediate connecting portion 97, and a third intermediate connecting portion 98. The first intermediate connecting portion 96 is provided between the first end connecting portion 84 and the bolt hole 81. The second intermediate connecting portion 97 is provided between the second end connecting portion 85 and the bolt hole 81. The first intermediate connecting part 96 and the second intermediate connecting part 97 are long and high connecting parts. The first intermediate connecting portion 96 and the second intermediate connecting portion 97 are also referred to as auxiliary connecting portions that assist the end connecting portions 84 and 85. The third intermediate connecting portion 98 is provided on the radially outer side of the bolt hole 81. The third intermediate connecting portion 98 is located on the extension of the first radial rib 74. The third intermediate connecting part 98 is a short connecting part. Also in this embodiment, a groove portion is formed between the plurality of connecting portions 84, 85, 96, 97, 98.

  According to this embodiment, since the plate-like connecting portions 84, 85, 96-98 are provided between the container 52 and the fastening portion 54, deformation of the case 51 that affects the position of the rotational position sensor is suppressed. . As a result, the rotational position sensor can be accurately positioned. According to this embodiment, since the ribs 73-76 are provided on the bottom wall 61 of the container 52, deformation of the case 51 that affects the position of the rotational position sensor is suppressed.

  The case 51 has a reinforcing rib 53d. The reinforcing rib 53d has a ridge line curved slightly concave. The reinforcing rib 53d is a triangle having two straight sides and one side curved in a concave shape. The shape of the reinforcing rib 53d can also be called a triangle. The reinforcing rib 53d does not reach the tip of the cover 53. The reinforcing rib 53d extends from the bottom wall 61 to a height exceeding half of the entire length of the cover 53. According to this embodiment, since the reinforcing rib 53d is provided on the cover 53, deformation of the cover 53 that affects the position of the rotational position sensor is suppressed. As a result, the rotational position sensor can be accurately positioned in the radial direction.

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

  For example, 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.

In the above embodiment, the case 51 is fixed to and supported by the stator 31. In addition to this, the case 51 may include a leg portion or an arm portion for contacting the body 13. The leg portion can be formed to be elastically deformed by contacting the body 13. The contents of Japanese Patent Application No. 2014-243431 (Japanese Patent Application Laid-Open No. 2011-144552) , which is a Japanese patent application that discloses such a leg, is cited as a technical disclosure in this specification. The case 51 may include an arm portion described in Patent Document 3 as an arm portion.

  In the above embodiment, the bolt holes 81 and 82 are provided by the embedded nuts 81a and 82a. Instead of this, the bolt holes 81 and 82 may be defined by the fastening portion 54. Further, instead of the embedded nuts 81a and 82a, a separate hexagon nut may be employed. Further, in the above embodiment, the fixing bolt 44 is inserted from the outer surface of the stator 31 and screwed into the bolt holes 81 and 82. Alternatively, the fixing bolt 44 may be inserted from the tightening portion 54 and screwed into a nut provided on the outer surface of the stator 31.

  In the above embodiment, the case 51 has the bottom connecting portion 83. Instead of this, the container 52 and the tightening portion 54 may be connected without providing the bottom connecting portion 83. Further, instead of the bottom connecting portion 83, a plate-like member that connects the upper end of the inner wall 62 and the radially inner end of the tightening portion 54 may be provided. Such a plate-like member provides a surface as illustrated, for example, in FIG. In other words, a shape in which a plurality of grooves are formed inside the block-shaped connecting portions 93 and 94 is provided.

  In the above embodiment, the ribs 73 to 76 are provided only inside the container 52. Alternatively, ribs may be provided on the outside of the container 52. Further, instead of the inner side, ribs corresponding to the ribs 73 to 76 may be provided only on the outer side. Moreover, you may provide some ribs 73-76 on the outer side.

  In the above embodiment, the container 52 has one circumferential rib 73. Instead of this, a plurality of circumferential ribs may be employed. In the above embodiment, the container 52 has three radial ribs 74, 75, 76. Alternatively, only one or two radial ribs may be employed. In addition, additional radial ribs may be employed.

  In the above embodiment, the case 51 has four covers 53. Instead of this, the case 51 may include only one cover 53. For example, only one cover 53 that accommodates only the rotational position sensor 43 for ignition control may be provided. Two rotational position sensors may be provided in one cover. In the above embodiment, only the longest cover 53 of the plurality of covers 53 has the reinforcing rib 53d. Instead of this, the plurality of covers 53 may be provided with reinforcing ribs 53d. For example, reinforcing ribs 53d can be provided on all the covers 53. Further, all the covers 53 may be formed to have the same length, and the position of the rotational position sensor 43 therein may be shifted as shown in the figure.

DESCRIPTION OF SYMBOLS 10 Rotating electrical machine for internal combustion engines, 11 Electrical circuit, 11a Wiring, 12 Internal combustion engine,
13 Body, 14 Rotating shaft, 21 Rotor, 22 Rotor core, 23 Permanent magnet,
24 holding cup, 25 fixing bolt, 31 stator, 32 stator core,
32a magnetic pole, 33 coil, 34 fixing bolt, 41 sensor unit,
42 electric circuit parts, 43 rotational position sensor, 44 fixing bolt,
51 Case, 52 Container, 53 Cover, 53d Reinforcement rib, 54 Tightening part,
55, 255, 355, 455, 555, 655, 755, 855 connecting part,
61 bottom wall, 62 inner wall, 63 outer wall, 64 first side wall, 65 second side wall,
71 support protrusions, 72 support protrusions, 73 circumferential ribs,
74 first radial rib, 75 second radial rib, 76 third radial rib,
81, 82 bolt hole, 81a, 82a buried nut,
83 bottom connecting portion, 84 first end connecting portion, 85 second end connecting portion,
86 1st intermediate connection part, 87 2nd intermediate connection part, 88 3rd intermediate connection part,
91 1st intermediate connection part, 92 2nd intermediate connection part,
93, 94 Block connection part, 95 Middle connection part,
96 first intermediate connecting portion, 97 second intermediate connecting portion, 98 third intermediate connecting portion,
LT length direction, HT height direction, DF stretch deformation direction.

Claims (22)

An electrical signal indicating the rotational position of the rotor is detected by detecting the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) interlocked with the internal combustion engine (12). In the rotational position detection device for an internal combustion engine that outputs,
A sensor (43) disposed between two adjacent magnetic poles (32a) of the stator core for detecting a change in magnetic flux of the rotor;
A case (51) for housing the sensor and an electric circuit component (42) connected to the sensor;
The case is
A container (52) having a bottom wall (61) and side walls (62-65) surrounding the bottom wall and containing the electrical circuit component;
A tightening portion (54) which is disposed radially inward of the container, has at least one bolt hole (81, 82) for receiving a fixing bolt (44), and is fastened and fixed to the stator core by the fixing bolt; ,
A connecting portion (55, 255, 355, 455, 555, 655) provided between the inner wall (62) positioned on the radially inner side of the side wall and the tightening portion to connect the inner wall and the tightening portion. , 755, 855)
The connecting portion is
A first end connecting portion (84) for connecting the circumferential end of the inner wall and the tightening portion;
A second end connecting portion (85) for connecting the other end portion of the inner wall in the circumferential direction and the tightening portion;
At least one intermediate connection between the first end connecting portion and the second end connecting portion , which is positioned at a central portion in the circumferential direction of the inner wall and connects the inner wall and the fastening portion. parts (86, 93e, 94e, 95,98 ) and the rotational position detecting device for an internal combustion engine and having a.   2. The rotational position detecting device for an internal combustion engine according to claim 1, wherein the intermediate connecting portion extends from the inner wall in the vicinity of the opening end of the container toward the fastening portion. The said intermediate | middle connection part contains the long intermediate | middle connection part ( 86, 93e, 94e, 95 ) extended from the said inner wall to the inner side from the said bolt hole toward the radial inside. The rotational position detection device for an internal combustion engine according to claim 2.   The said intermediate | middle connection part contains the short intermediate | middle connection part extended to the outer side from the said bolt hole toward the radial inside from the said inner wall, The Claim 1 characterized by the above-mentioned. A rotational position detection device for an internal combustion engine.   The said 1st end part connection part, the said 2nd end part connection part, and the said intermediate | middle connection part are the plate-shaped members positioned away along the circumferential direction, The Claim 1 characterized by the above-mentioned. 4. The rotational position detection device for an internal combustion engine according to any one of 4 above. The connecting portion further includes a bottom connecting portion (83) for connecting the bottom wall and the fastening portion.
A groove is defined between the first end connecting part and the intermediate connecting part or between the second end connecting part and the intermediate connecting part. The rotational position detecting device for an internal combustion engine according to claim 5, wherein the rotational position detecting device is provided by an inclined surface (62a) extending between the inner wall and the tightening portion. The connecting portion further includes a bottom connecting portion (83) for connecting the bottom wall and the fastening portion.
The first end connecting part, the second end connecting part, the intermediate connecting part, and the bottom connecting part are provided between the inner wall and the tightening part, and block forming the bolt hole The rotational position detecting device for an internal combustion engine according to any one of claims 1 to 4, wherein the rotational position detecting device is provided by a connecting portion (93, 94) having a shape of a shape. The case extends from the bottom wall and includes a cover (53) that houses the sensor;
The internal combustion engine according to any one of claims 1 to 7, further comprising a plate-shaped reinforcing rib (53d) provided radially inward from the cover and extending between the bottom wall and the cover. Engine rotational position detector.   The rotational position detecting device for an internal combustion engine according to any one of claims 1 to 8, wherein the tightening portion has two bolt holes (81, 82) that are arranged apart from each other in the circumferential direction. .   The said bottom wall has the radial direction rib (74, 75, 76) extended on the said bottom wall toward the radial direction outer side from the position corresponding to the said intermediate connection part, The Claim 1 characterized by the above-mentioned. The rotational position detection device for an internal combustion engine according to any one of 9. An electrical signal indicating the rotational position of the rotor is detected by detecting the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) interlocked with the internal combustion engine (12). In the rotational position detection device for an internal combustion engine that outputs,
A sensor (43) disposed between two adjacent magnetic poles (32a) of the stator core for detecting a change in magnetic flux of the rotor;
A case (51) for housing the sensor and an electric circuit component (42) connected to the sensor;
The case is
A container (52) having a bottom wall (61) and side walls (62-65) surrounding the bottom wall and containing the electrical circuit component;
A tightening portion (54) which is disposed radially inward of the container, has at least one bolt hole (81, 82) for receiving a fixing bolt (44), and is fastened and fixed to the stator core by the fixing bolt; ,
A connecting portion (55, 255, 355, 455, 555, 655) provided between the inner wall (62) positioned on the radially inner side of the side wall and the tightening portion to connect the inner wall and the tightening portion. , 755, 855)
The bottom wall is provided at a central portion in the circumferential direction of the case, and has a radial rib ( 74 ) extending on the bottom wall from the inner wall toward the outside in the radial direction. Position detection device. The bottom wall is
In addition to the radial ribs at the center,
The rotational position for an internal combustion engine according to claim 10 or 11, comprising a plurality of other radial ribs (75, 76) extending above the bottom wall from the inner wall toward the radially outer side. Detection device.   The rotational position for an internal combustion engine according to any one of claims 10 to 12, wherein the radial rib is formed so as to be higher along the inner wall near the inner wall in the vicinity of the inner wall. Detection device. The bottom wall has support protrusions (71, 72) extending into the container to support the electrical circuit component;
14. The internal combustion engine according to claim 10, wherein the radial rib extends into the container and is lower than the support protrusion in the vicinity of the support protrusion. Rotation position detection device.   The rotational position detecting device for an internal combustion engine according to any one of claims 10 to 14, wherein the bottom wall includes a circumferential rib (73) extending on the bottom wall along a circumferential direction. . The bottom wall is
A circumferential rib (73) extending over the bottom wall along a circumferential direction;
Supporting protrusions (71, 72) provided at intersections of the circumferential ribs and the other radial ribs and extending into the container so as to support the electric circuit components. The rotational position detection device for an internal combustion engine according to claim 12 . An electrical signal indicating the rotational position of the rotor is detected by detecting the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) interlocked with the internal combustion engine (12). In the rotational position detection device for an internal combustion engine that outputs,
A sensor (43) disposed between two adjacent magnetic poles (32a) of the stator core for detecting a change in magnetic flux of the rotor;
A case (51) for housing the sensor and an electric circuit component (42) connected to the sensor;
The case is
A container (52) having a bottom wall (61) and side walls (62-65) surrounding the bottom wall and containing the electrical circuit component;
Tightening which is fixed to the stator core by fixing bolts (44) which have two bolt holes (81, 82) arranged in the circumferential direction on the radially inner side from the container and are received in the bolt holes Part (54);
Have a connecting portion and (55,255,355,455,555,655,755) for connecting the inner wall (62) and the fastening portion located radially inwardly of said side wall,
The connecting portion is
Be between two of said bolt holes, located in the center of the circumferential direction of the inner wall, intermediate connecting portion connecting the inside wall and the fastening section (86,93e, 94e, 95,98) and Yes engine rotating position detecting device characterized by. An electrical signal indicating the rotational position of the rotor is detected by detecting the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) interlocked with the internal combustion engine (12). In the rotational position detection device for an internal combustion engine that outputs,
A sensor (43) disposed between two adjacent magnetic poles (32a) of the stator core for detecting a change in magnetic flux of the rotor;
A case (51) for housing the sensor and an electric circuit component (42) connected to the sensor;
The case is
A container (52) having a bottom wall (61) and side walls (62-65) surrounding the bottom wall and containing the electrical circuit component;
A tightening portion (54) which is disposed radially inward of the container and has two bolt holes (81, 82) for receiving a fixing bolt (44), and is fastened and fixed to the stator core by the fixing bolt; ,
A connecting portion (55, 255, 355, 455, 555, 655) provided between the inner wall (62) positioned on the radially inner side of the side wall and the tightening portion to connect the inner wall and the tightening portion. , 755, 855)
The connecting portion is
A first end connecting portion (84) for connecting the circumferential end of the inner wall and the tightening portion;
A second end connecting portion (85) for connecting the other end portion of the inner wall in the circumferential direction and the tightening portion;
At least one intermediate connecting portion between the first end connecting portion and the second end connecting portion , which is positioned between the two bolt holes and connects the inner wall and the tightening portion. ( 86, 91 , 92, 93e, 94e, 95, 98 ) A rotational position detecting device for an internal combustion engine, characterized by comprising: An electrical signal indicating the rotational position of the rotor is detected by detecting the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) interlocked with the internal combustion engine (12). In the rotational position detection device for an internal combustion engine that outputs,
A sensor (43) disposed between two adjacent magnetic poles (32a) of the stator core for detecting a change in magnetic flux of the rotor;
A case (51) for housing the sensor and an electric circuit component (42) connected to the sensor;
The case is
A container (52) having a bottom wall (61) and side walls (62-65) surrounding the bottom wall and containing the electrical circuit component;
Tightening which is fixed to the stator core by fixing bolts (44) which have two bolt holes (81, 82) arranged in the circumferential direction on the radially inner side from the container and are received in the bolt holes Part (54);
Have a connecting portion and (55,255,355,455,555,655,755) for connecting the inner wall (62) and the fastening portion located radially inwardly of said side wall,
The connecting portion is
An internal connection part ( 86, 91, 92, 93e, 94e, 95, 98) which is positioned between the two bolt holes and connects the inner wall and the tightening part. Rotation position detection device. An electrical signal indicating the rotational position of the rotor is detected by detecting the magnetic flux of the magnet (23) provided in the stator core (32) of the rotating electrical machine (10) interlocked with the internal combustion engine (12). In the rotational position detection device for an internal combustion engine that outputs,
A sensor (43) disposed between two adjacent magnetic poles (32a) of the stator core for detecting a change in magnetic flux of the rotor;
A case (51) for housing the sensor and an electric circuit component (42) connected to the sensor;
The case is
A container (52) having a bottom wall (61) and side walls (62-65) surrounding the bottom wall and containing the electrical circuit component;
A tightening portion (54) which is disposed radially inward of the container, has at least one bolt hole (81, 82) for receiving a fixing bolt (44), and is fastened and fixed to the stator core by the fixing bolt; ,
A connecting portion (55, 255, 355, 455, 555, 655) provided between the inner wall (62) positioned on the radially inner side of the side wall and the tightening portion to connect the inner wall and the tightening portion. , 755, 855),
Provided on an inner surface of said bottom wall, a circumferential rib extending along the circumferential direction (73), and / or radial ribs extending along the radial direction (74-76),
A cover (53) extending from the outer surface of the bottom wall and containing the sensor;
A rotational position detecting device for an internal combustion engine, comprising a plate-shaped reinforcing rib (53d) provided radially inward from the cover and extending between the outer surface of the bottom wall and the cover. The case has a plurality of covers including the cover,
The reinforcing ribs, the rotational position detecting device for an internal combustion engine according to claim 8 or claim 20, characterized in that it is provided only on the longest the cover of the plurality of the cover. The reinforcing rib has a radial height from the radially inner surface of the cover toward the radially inner side, and the radial height gradually increases from the bottom wall toward the tip of the cover. The rotational position detecting device for an internal combustion engine according to any one of claims 8, 20, and 21 , wherein the rotational position detecting device is low.

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