JP5840282B1 - Rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protrusion that engages with an engaging portion of a lateral B terminal in a case of an inverter unit that is thicker than a protective cover, and even when a high load torque acts on the lateral B terminal, A rotating electrical machine capable of reliably preventing the rotation of the lateral B terminal is obtained. A lateral B terminal is mounted on a shaft portion of a lateral B terminal connecting bolt that projects a flat portion from a spacer, projects in a direction perpendicular to the axis of the lateral B terminal connecting bolt, and is mounted on the shaft portion. The nuts are electrically connected to the bus bar by the tightening force of the nuts, the engaging portions are provided on the lateral B terminals so as to protrude toward the case, and the pair of projecting portions are the lateral B terminal connecting bolts of the engaging portions. It is provided in a case so that it may be located in the both sides of the circumference direction centering on the axis of this, and it contacts an engagement part and regulates rotation around the axis of a side B terminal connecting bolt of a side B terminal. [Selection] Figure 4

Description

  The present invention relates to a rotating electrical machine such as an electric motor or a generator, and more particularly to a rotation preventing structure for a power input / output terminal (hereinafter referred to as a lateral B terminal) drawn in a radial direction of the rotating electrical machine.

  In the conventional rotating electrical machine, the engaging body provided on the lateral B terminal is fitted into the fitting portion formed on the lateral B terminal lead-out portion of the protective cover, and the flat portion of the lateral B terminal is used as the positive-side heat sink of the rectifier. The lateral B terminal is prevented from rotating when fastened and fixed to the external harness or when the external harness is fastened and fixed to the lateral B terminal (see, for example, Patent Document 1).

JP 2012-34429 A

  In a conventional rotating electrical machine, a fitting portion into which an engaging body of a lateral B terminal is fitted is provided on a protective cover made of a thin resin molded body. Therefore, when the flat portion of the lateral B terminal is fastened and fixed to the positive-side heat sink of the rectifier or when the external harness is fastened and fixed to the lateral B terminal, if the high load torque acts on the lateral B terminal, the fitting portion becomes There was a problem that the high load torque transmitted through the engaging portion could not be received and the protective cover was damaged.

  The present invention has been made to solve such a problem, and a protrusion that engages with the engaging portion of the lateral B terminal is provided on the case of the inverter unit that is thicker than the protective cover, and An object of the present invention is to obtain a rotating electrical machine that can reliably prevent the rotation of the lateral B terminal even when a high load torque acts on the B terminal.

A rotating electrical machine according to the present invention includes a rotor fixed to a rotating shaft supported by a housing and rotatably disposed in the housing, and a stator held by the housing so as to surround the rotor. A motor unit having a plurality of power modules that perform power conversion between DC power and AC power, a flat plate having a central hole, and one surface facing outward in the axial direction, and the rotating shaft as the central hole A heat sink that is disposed so as to be orthogonal to the rotation axis and the power modules are mounted on the one surface in a circumferential direction, an insulating resin case fixed to the one surface of the heat sink, and has become the case and integrally so as to be exposed next to the B terminal mounting hole formed in the outer peripheral portion of the case, have a through-hole formed in the exposed portion of the lateral B terminal mounting hole An inverter assembly having a positive electrode electrically connected to the bus bar of the plurality of power modules, and is integral with the casing so as to be exposed overlap with the bus bars to the horizontal B terminal mounting hole, the upper Symbol A metal plate having a press-fitting hole formed coaxially with the through-hole and smaller in diameter than the through-hole, and a lateral B that is press-fitted into the press-fitting hole of the metal plate from the side opposite to the bus bar and protrudes from the through-hole. Terminal connecting bolt, metal cylindrical spacer mounted on the shaft portion of the lateral B terminal connecting bolt projecting from the through hole, and lateral B terminal connecting bolt projecting a flat portion from the spacer The bus bar is electrically connected to the bus bar by a tightening force of a nut attached to the shaft portion and protruding in a direction perpendicular to the axis of the lateral B terminal connecting bolt. A lateral B terminal to be connected; an engagement portion provided on the lateral B terminal so as to protrude toward the case; and a circumference around the axis of the lateral B terminal connection bolt of the engagement portion A pair of protrusions that are provided on the case so as to be positioned on both sides of the direction, and that are in contact with the engaging portion and restrict rotation of the lateral B terminal around the axis of the lateral B terminal connection bolt; Is provided.

  According to the present invention, since the protrusion is provided on the case so as to contact the engaging portion and prevent the lateral B terminal from rotating, the protrusion of the protrusion can be compared with the case where the protrusion is formed on the protective cover. Stiffness is increased. Therefore, the protrusion can receive a high load torque acting on the lateral B terminal without being damaged, and the lateral B terminal can be reliably prevented from rotating.

It is a longitudinal cross-sectional view which shows the rotary electric machine which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the state before the inverter assembly in the rotary electric machine which concerns on Embodiment 1 of this invention is mounted | worn. It is a top view which shows the inverter assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part top view which shows the horizontal B terminal part periphery of the inverter assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a VV arrow sectional view of Drawing 4. It is VI-VI arrow sectional drawing of FIG. It is a principal part top view which shows the horizontal B terminal part periphery of the inverter assembly in the rotary electric machine which concerns on Embodiment 2 of this invention. It is VIII-VIII arrow sectional drawing of FIG. It is a principal part top view which shows the horizontal B terminal part periphery of the inverter assembly in the rotary electric machine which concerns on Embodiment 3 of this invention. It is XX arrow sectional drawing of FIG. It is a principal part top view which shows the horizontal B terminal part periphery of the inverter assembly in the rotary electric machine which concerns on Embodiment 4 of this invention.

  Hereinafter, preferred embodiments of a rotating electrical machine according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 is a longitudinal sectional view showing a rotating electrical machine according to Embodiment 1 of the present invention, FIG. 3 is a longitudinal sectional view showing a state before the inverter assembly is mounted in the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 4 is a plan view showing an inverter assembly in the rotary electric machine according to Embodiment 1 of the present invention, and FIG. 4 is a plan view of a principal part showing a portion around a lateral B terminal portion of the inverter assembly in the rotary electric machine according to Embodiment 1 of the present invention. 5 is a cross-sectional view taken along the line VV in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG.

  1 to 3, the rotating electrical machine 100 includes a motor unit 110 and an inverter assembly 120.

  The motor unit 110 includes a housing 1 composed of a substantially bowl-shaped metal front bracket 2 and rear bracket 3, and a rotary shaft rotatably supported by the front bracket 2 and the rear bracket 3 via bearings 8 and 9. The rotor 5 fixed to 4 and disposed inside the housing 1, and held between the front bracket 2 and the rear bracket 3 from both sides in the axial direction and held by the housing 1 so as to surround the rotor 5. An outer periphery of a stator 10, a pulley 13 fixed to the end of the rotating shaft 4 protruding from the front bracket 2 and bi-directionally transmitting and receiving torque to the internal combustion engine, and an end of the rotating shaft 4 protruding from the rear bracket 3 A pair of slip rings 14 disposed on the surface and supplying a field current to the field winding 7 of the rotor 5 and a pair of slip rings held by the brush holder 15 Comprises a pair of brushes 16 sliding on the 4, it is disposed on the rotary shaft 4 coaxially between the bearing 9 and the slip rings 14, a magnetic pole position detecting sensor 19 for detecting the rotational state of the rotor 5, a.

The rotor 5 includes a field iron core 6 and a field winding 7 disposed in the field iron core 6, and is fixed to the rotary shaft 4 inserted at the axial center position of the field iron core 6. The housing 1 is rotatably arranged. The fans 17 and 18 are fixed to both end surfaces of the field core 6 in the axial direction.
The stator 10 includes an annular stator core 11 and a stator winding 12 attached to the stator core 11.

  The magnetic pole position detection sensor 19 includes a sensor rotor 19a fixed between the bearing 9 of the rotating shaft 4 and the slip ring 14, and a sensor stator 19b disposed so as to surround the sensor rotor 19a.

  The inverter assembly 120 includes six power modules 20 including switching elements and peripheral circuits for supplying stator current during driving and rectifying stator current during power generation, and switching for controlling field current. The power module 20 and the field module 21 are made of a field module 21 composed of an element and its peripheral circuit, and an annular flat plate having a central hole 22a using a metal material having good heat conductivity such as copper and aluminum. Electrical insulation in which a heat sink 22 mounted in a row in a circumferential direction on one surface via a terminal (not shown) and a terminal connected to a power system terminal of the power module 20 and the field module 21 are insert-molded Control case 23 for controlling the power module 20 and the field module 21. There comprises a control module 24 that is configured, the. The sensor stator 19 b of the magnetic pole position detection sensor 19 is attached to the heat sink 22, and the signal line of the magnetic pole position detection sensor 19 is connected to the control module 24.

  Each of the power module 20 and the field module 21 is manufactured by mounting a switching element or the like on a wiring lead frame and molding the entire resin. The case 23 is mounted on one surface of the heat sink 22 so as to surround the power module 20, the field module 21, and the control module 24. Then, one end of the terminal 23a insert-molded in the case 23 is joined to the AC output terminal 20a of the power module 20 by welding, and the minus terminal 23b of the inverter assembly 120 is screwed to the heat sink 22 to be electrically connected. A waterproof resin 25 is filled in the case 23, and the power module 20, the field module 21, the control module 24, and the electrical connection portion are waterproofed.

  The connecting board 26 is configured by insert-molding a terminal 26 a for connecting the lead wire 12 a of the stator winding 12 and the power module 20, and is fixed to the outer side in the axial direction of the rear bracket 3 with a screw. The lead wire 12a is pulled out from the rear bracket 3 in the axial direction, and joined to one end of the terminal 26a by welding or the like.

  The brush holder 15 is disposed in a central hole 22a through which the rotation shaft 4 of the heat sink 22 passes, and is fixed to the heat sink 22 with screws. The inverter assembly 120 has the rear bracket 3 so that one surface of the heat sink 22 is directed outward in the axial direction, the rotating shaft 4 is passed through the central hole 22a, and the one surface of the heat sink 22 is orthogonal to the rotating shaft 4. Mounted on the outside in the axial direction. Therefore, the other end of the terminal 26a insert-molded in the connecting board 26 is fixed to the other end of the terminal 23a insert-molded in the case 23 with a screw, and is electrically connected. Thereafter, the protective cover 27 is attached so as to house the inverter assembly 120 therein.

  Next, the structure of the lateral B terminal portion will be described with reference to FIGS.

  The lateral B terminal mounting hole 28 is formed on the outer peripheral side of the case 23 as shown in FIG. Further, as shown in FIG. 3, the pair of protrusions 29 are formed apart from the lateral B terminal mounting hole 28 of the case 23. A bus bar 30 connected to the positive electrode side of the external battery is insert-molded in the case 23 as shown in FIG. The bus bar 30 is electrically connected to the positive input terminal of the power module 20, and its end is exposed in a lateral B terminal mounting hole 28 formed on the outer peripheral side of the case 23. As shown in FIGS. 5 and 6, the metal plate 31 is insert-molded in the case 23 and is exposed in the lateral B terminal mounting hole 28 so as to overlap the bus bar 30 in the thickness direction of the case 23. A press-fitting hole 31 a into which the lateral B terminal connecting bolt 32 is press-fitted is formed in the exposed portion in the lateral B terminal mounting hole 28 of the metal plate 31. Further, a through hole 30a having a diameter larger than that of the shaft portion of the lateral B terminal connecting bolt 32 is formed coaxially with the press-fit hole 31a in the exposed portion in the lateral B terminal mounting hole 28 of the bus bar 30.

  As shown in FIGS. 5 and 6, the lateral B terminal connecting bolt 32 includes a head portion 32a, a shaft portion 32b, and a mounting screw portion 32c formed on the opposite side of the shaft portion 32b from the head portion 32a. . As shown in FIG. 6, the lateral B terminal 33 includes a terminal screw portion 33a, a flange portion 33b that is integrally formed at the root of the terminal screw portion 33a and that forms a harness connection base, and a flat portion 33c. A connecting portion 33d for connecting the flange portion 33b and the flat portion 33c, and insert molding so that the terminal screw portion 33a, the surface of the flange portion 33b on the terminal screw portion side, and the flat portion 33c are exposed. ing. As shown in FIG. 6, the connecting portion 33d embedded in the resin portion 33e is bent into an L shape, and the axis of the terminal screw portion 33a is orthogonal to the flat surface of the flat portion 33c. . Furthermore, the engaging part 33f fitted between the pair of projecting parts 29 is formed so as to protrude into the resin part 33e.

  Then, the lateral B terminal connecting bolt 32 is press-fitted into the press-fitting hole 31 a of the metal plate 31 from the side opposite to the bus bar 30. Next, a metallic cylindrical spacer 34 is attached to the shaft portion 32b of the lateral B terminal connecting bolt 32 protruding from the through hole 30a of the bus bar 30, and the flat portion 33c of the lateral B terminal 33 is attached to the shaft portion 32b. Is done. Thereafter, the nut 35 is screwed onto the mounting screw portion 32 c of the lateral B terminal connecting bolt 32. Then, by tightening the nut 35, the lateral B terminal 33 is attached to the inverter assembly 120 via the lateral B terminal connecting bolt 32. The bus bar 30 and the spacer 34 are press-contacted by the fastening force of the nut 35, the spacer 34 and the flat portion 33 c are press-contacted, and the lateral B terminal 33 is electrically connected to the bus bar 30 via the spacer 34. . Further, the engaging portion 33f is fitted between the pair of projecting portions 29, and the rotation of the lateral B terminal 33 around the axis of the lateral B terminal connecting bolt 32 is restricted. Further, the insulating cap 36 is attached to the resin portion 33e so as to cover the fastening portion of the nut 35, and the electrical connection portion between the lateral B terminal 33 and the bus bar 30 is insulated and protected.

  Although not shown, the inverter assembly 120 is attached to the rear bracket 3 so that the axis of the lateral B terminal connecting bolt 32 is parallel to the axis of the rotating shaft 4. The lateral B terminal 33 is configured to extend outward in the axial direction after being displaced radially outward from the lateral B terminal connecting bolt 32 by the connecting portion 33d. Then, a battery harness (not shown) is attached to the terminal screw portion 33a of the lateral B terminal 33, and a nut (not shown) screwed to the terminal screw portion 33a is fastened to secure the lateral B terminal. 33, the spacer 34 and the bus bar 30 are electrically connected to the positive input terminal of the power module 20.

Next, the operation of the rotating electrical machine 100 configured as described above will be described.
The rotating electrical machine 100 is connected to an engine crankshaft (not shown) via a pulley 13 and a belt (not shown). A positive electrode of a battery (not shown) is connected to the lateral B terminal 33. Further, the front bracket 2 and the rear bracket 3 are grounded and held at the ground potential. The control module 24 controls the field module 21 to adjust the field current that flows through the field winding 7 of the rotor 5. The rotating electrical machine 100 has an electric function for starting the engine and an electric function for power generation.

  Here, when the engine is started, DC power is supplied from the battery to the power module 20 via the lateral B terminal 33, the spacer 34, and the bus bar 30. And the control module 24 performs ON / OFF control of the switching element of the power module 20, and DC power is converted into three-phase AC power. This three-phase AC power is supplied to the stator winding 12 via the terminals 23a and 26a and the lead wire 12a. Then, a rotating magnetic field is applied to the field winding 7 of the rotor 5 to which the field current is supplied by the field module 21, and the rotor 5 is rotationally driven. The rotational torque of the rotor 5 is transmitted to the engine via the rotating shaft 4, the pulley 13 and the belt, and the engine is ignited and started.

  On the other hand, when the engine is started, the rotational torque of the engine is transmitted to the rotating electrical machine 100 via the crankshaft, the belt, and the pulley 13. Thereby, the rotor 5 is rotated and a three-phase AC voltage is induced in the stator winding 12. Therefore, the control module 24 performs ON / OFF control of the switching element of the power module 20, converts the three-phase AC power induced in the stator winding 12 into DC power, and supplies the DC power to the battery or the electric load.

  The signal output of the magnetic pole position detection sensor 19 is sent to the control module 24, used for detecting the rotational position of the rotor 5, and used as control information during the power generation operation of the rotating electrical machine 100 and the engine start operation.

  Here, the battery harness is attached to the terminal B screw portion 33 a of the lateral B terminal 33, and is attached to the lateral B terminal 33 by fastening a nut screwed to the terminal screw portion 33 a. For example, the rotation direction of the nut 35 for fastening the lateral B terminal 33 to the lateral B terminal connection bolt 32 and the rotation direction of the nut for fastening the battery harness to the lateral B terminal 33 are both shown in FIG. Clockwise. Therefore, the fastening operation of the nut for fixing the battery harness causes the lateral B terminal 33 to rotate clockwise about the axis of the lateral B terminal connecting bolt 32 in FIG. Acts to loosen.

  According to the first embodiment, the lateral B terminal 33 is mounted on the shaft portion 32b of the lateral B terminal connection bolt 32 protruding from the spacer 34 with the flat portion 33c, and the shaft center of the lateral B terminal connection bolt 32 is It protrudes in the orthogonal direction and is electrically connected to the bus bar 30 by the tightening force of the nut 35 screwed into the mounting screw portion 32c. An engaging portion 33 f protruding from the resin portion 33 e of the lateral B terminal 33 toward the case 23 is fitted between a pair of protruding portions 29 formed on the case 23. As a result, the rotation of the lateral B terminal 33 around the axis of the lateral B terminal connecting bolt 32 is prevented by the engaging portion 33f coming into contact with the protruding portion 29, so that the tightening force of the nut 35 is reduced. Generation | occurrence | production can be suppressed and the reliability of the electrical connection of the horizontal B terminal 33 and the bus-bar 30 is improved.

In addition, since the pair of protrusions 29 are provided on the case 23, the rigidity of the protrusions 29 is higher than when the protrusions 29 are formed on the thin protective cover 27. Therefore, when the flat portion 33c of the lateral B terminal 33 is fastened and fixed to the lateral B terminal connecting bolt 32 or when the battery harness is fastened and fixed to the lateral B terminal 33, a high load torque acts on the lateral B terminal 33. Even so, the occurrence of a situation in which the pair of protrusions 29 is damaged can be suppressed.
Further, when the flat portion 33c of the lateral B terminal 33 is fastened and fixed to the lateral B terminal connecting bolt 32, the high load torque due to the fastening of the nut 35 is received by the protrusion 29 via the engaging portion 33f. Therefore, the fastening force by the nut 35 can be increased.

  Here, since the metal plate 31 is made of aluminum or an aluminum alloy, the weight can be reduced. Furthermore, even if the size variation of the press-fit tightening allowance is large, the variation of the press-fit load can be reduced, so that stable press-fitting of the lateral B terminal connecting bolt 32 is possible, and the productivity can be improved.

  In addition, in the fitting portion between the engaging portion 33f and the protruding portion 29, the engaging portion 33f and the protruding portion 29 are in contact with each other or have a minute gap due to dimensional tolerance. In Embodiment 1, since the resin part 33e including the engaging part 33f is made of the same resin material as the case 23, the linear expansion coefficient of the engaging part 33f and the protruding part 29 is the same, and heat shrinkage and The dimensional difference between the engaging portion 33f and the protruding portion 29 due to thermal expansion is eliminated. Therefore, it is possible to prevent the gap between the engaging portion 33f and the protruding portion 29 from widening and loosening the fastening by the nut 35. Alternatively, a compression action is generated between the engaging portion 33f and the protruding portion 29, and the engaging portion 33f and the protruding portion 29 are prevented from being damaged.

Embodiment 2. FIG.
7 is a main part plan view showing the periphery of the lateral B terminal portion of the inverter assembly in the rotary electric machine according to Embodiment 2 of the present invention, and FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. In FIG. 7, the lateral B terminal connecting bolt 32 and the lateral B terminal 33 are omitted.

7 and 8, the metal plate 31 is insert-molded in the case 23 so that a part of the metal plate 31 is disposed in the pair of protrusions 29.
Other configurations are the same as those in the first embodiment.

Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.
According to the second embodiment, a part of the metal plate 31 insert-molded in the case 23 extends into the pair of protrusions 29, and the rigidity of the protrusions 29 is increased. Therefore, since the protrusion 29 can receive a high load torque, the fastening force by the nut 35 can be increased, and the occurrence of loosening of the fastening force of the nut 35 can be prevented.

Embodiment 3 FIG.
9 is a plan view of a principal part showing the periphery of a lateral B terminal portion of an inverter assembly in a rotary electric machine according to Embodiment 3 of the present invention, and FIG. 10 is a cross-sectional view taken along the line XX of FIG. In FIG. 9, the lateral B terminal connecting bolt 32 and the lateral B terminal 33 are omitted.

9 and 10, the case 23 is fixed to the heat sink 22 by screwing the screw 37 through the metal plate 31 from the opposite side of the heat sink 22 to the heat sink 22 on both sides of the lateral B terminal mounting hole 28. Has been. At this time, the metal plate 31 includes a large-diameter screw insertion hole 31 b through which the screw 37 is passed, and is electrically insulated from the heat sink 22.
Other configurations are the same as those in the second embodiment.

Therefore, also in Embodiment 3, the same effect as in Embodiment 2 can be obtained.
According to the third embodiment, since the screw 37 penetrates the metal plate 31 and is fastened to the heat sink 22, it can be firmly fixed to the heat sink 22 without damaging the resin case 23. Therefore, the vibration resistance of the inverter assembly 120 is improved. Further, even if stress is applied to the lateral B terminal portion, the metal plate 31 is not deformed. Therefore, the occurrence of deformation of the portion of the bus bar 30 overlapping the metal plate 31 is suppressed, and the bus bar 30 and the lateral B terminal 33 are prevented from being deformed. The reliability of electrical connection is improved.

Embodiment 4 FIG.
FIG. 11 is a main part plan view showing the periphery of the lateral B terminal portion of the inverter assembly in the rotary electric machine according to Embodiment 4 of the present invention. In FIG. 11, the lateral B terminal connecting bolt 32 and the lateral B terminal 33 are omitted.

In FIG. 11, the engaging portion 33 f and the protruding portion 29 are configured to come into surface contact when the lateral B terminal 33 rotates around the axis of the lateral B terminal connecting bolt 32.
Other configurations are the same as those in the third embodiment.

Therefore, also in the fourth embodiment, the same effect as in the third embodiment can be obtained.
According to the fourth embodiment, the engaging portion 33f and the protruding portion 29 are in surface contact with each other when the lateral B terminal connecting bolt 32 of the lateral B terminal 33 is rotated about the axis, so that the high load torque is applied to the surface. Can be received at. Therefore, compared with the case where a high load torque is received at a point, the stress concentration is alleviated, and the occurrence of sag and dents on the resin portion of the engaging portion 33f and the protruding portion 29 is suppressed.

  DESCRIPTION OF SYMBOLS 1 Housing, 4 Rotating shaft, 5 Rotor, 10 Stator, 20 Power module, 22 Heat sink, 22a Center hole, 23 Case, 28 Side B terminal mounting hole, 29 Protrusion part, 30 Bus bar, 30a Through hole, 31 Metal plate , 31a Press-fit hole, 31b Screw insertion hole, 32 Lateral B terminal connection bolt, 33 Lateral B terminal, 33f Engagement part, 34 Spacer, 35 Nut, 37 Screw, 110 Motor part, 120 Inverter assembly.

Claims (6)

A rotor fixed to a rotating shaft supported by the housing and rotatably disposed in the housing; and a motor unit having a stator held by the housing so as to surround the rotor;
A plurality of power modules that perform power conversion between direct current power and alternating current power, are produced in a flat plate shape having a central hole, and the rotational shaft passes through the central hole with one surface facing outward in the axial direction. A heat sink in which the plurality of power modules are arranged in a circumferential direction on the one surface, a case made of an insulating resin fixed to the one surface of the heat sink, and an outer peripheral portion of the case Is formed integrally with the case so as to be exposed in the lateral B terminal mounting hole formed in the above, and has a through hole formed in the exposed portion in the lateral B terminal mounting hole. An inverter assembly with an electrically connected bus bar;
Has become the case and integrally so as to be exposed overlap with the bus bars to the horizontal B terminal mounting hole, the upper SL through hole coaxially and the metal plate having a press-fit hole formed in a smaller diameter than the through hole ,
A lateral B terminal connecting bolt that is press-fitted into the press-fitting hole of the metal plate from the opposite side of the bus bar and protrudes from the through-hole;
A metallic cylindrical spacer attached to the shaft portion of the lateral B terminal connecting bolt protruding from the through hole;
Tightening force of a nut mounted on the shaft portion of the lateral B terminal connecting bolt that is mounted on the shaft portion of the lateral B terminal connecting bolt protruding from the spacer and projecting in a direction perpendicular to the axis of the lateral B terminal connecting bolt A lateral B terminal electrically connected to the bus bar,
An engaging portion provided on the lateral B terminal so as to protrude toward the case;
The case is provided on the case so as to be positioned on both sides in the circumferential direction around the axis of the bolt for connecting the lateral B terminal of the engaging portion, and is in contact with the engaging portion and the lateral of the lateral B terminal. A rotating electric machine comprising: a pair of protrusions that regulate rotation around the axis of the B terminal connecting bolt. The metal plate is rotating electric machine according to claim 1, wherein a portion of which is disposed in the pair of projections portion.   The rotating electrical machine according to claim 2, wherein the metal plate is made of aluminum.   4. The rotating electrical machine according to claim 2, wherein the pair of projecting portions are fixed to the heat sink by passing screws through the metal plate from the side opposite to the heat sink.   The said engaging part and said pair of protrusion part are comprised so that a surface contact may be carried out at the time of the surroundings of the axis of the said horizontal B terminal connection bolt of the said engaging part. The rotating electrical machine according to any one of 4.   The rotating electrical machine according to any one of claims 1 to 5, wherein the engaging portion and the protruding portion are made of the same resin material.

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