JP4543057B2 - Rotating electric machine for vehicles - Google Patents

Description

  The present invention relates to a vehicular rotating electrical machine used in a vehicle, and more particularly to a structure of an input / output terminal portion that transmits and receives power between a lead wire of a stator winding of the rotating electrical machine for a vehicle and an input / output harness. .

  In a conventional vehicular rotating electrical machine, the relay member is screwed onto the male screw portion of the output terminal bolt and comes into surface contact with one surface of the fastening washer, and the stator side terminal is between the head and the other surface of the fastening washer. It is fastened to the surface contact state. Further, the nut is screwed into the male thread portion of the output terminal bolt extending from the relay member, and the three-phase electric wire side terminal is fastened in surface contact with the end surface of the relay member opposite to the washer. An insulating cylinder is interposed between the relay member and a take-out hole formed in the bracket so as to cover the outer periphery of the relay member. Further, an insulating bush is mounted in the take-out hole so as to cover the insulating cylinder, the extended portion of the output terminal bolt from the insulating cylinder, and further the three-phase electric wire side terminal (see, for example, Patent Document 1).

JP 2006-325376 A

  In conventional vehicular rotating electrical machines, since the insulating bush is mounted in the take-out hole formed in the bracket, the hole machining accuracy of the take-out hole formed in the aluminum bracket must be increased, and the processing cost is increased. In addition, the relay member is fastened to the male screw portion of the output terminal bolt after the insulating bush is mounted in the take-out hole, and the assembly workability of the three-phase output terminal portion is deteriorated.

  The present invention has been made to solve the above-described problems. The insulating bush is directly attached to the insulating cylinder by a snap-fit coupling method, and the extraction hole can be formed in the bracket without increasing the hole machining accuracy. An object of the present invention is to obtain an inexpensive rotating electrical machine for a vehicle that can be fitted with an insulating bush after the member is fastened to the male thread portion of the input / output terminal bolt, and that is excellent in assembly workability.

  A rotating electrical machine according to the present invention includes a housing, a rotor fixed to a shaft rotatably supported by the housing and disposed in the housing, and surrounding the rotor via a predetermined air gap. A stator having an arranged stator core and a stator winding wound around the stator core, and a three-phase stator side terminal to which a three-phase lead wire of the stator winding is connected; And a three-phase input / output terminal portion for connecting the three-phase stator side terminal and the three-phase input / output harness. The input / output terminal portion of each phase includes a fastening portion and a fastening washer having a through hole bored in the fastening portion, a head portion, a shaft portion extending on one side of the head portion, and the shaft portion base A knurled portion formed on the shaft portion and a male screw portion formed on the shaft portion. The knurled portion is press-fitted into the through hole of the fastening portion, and the shaft portion extends from a take-out hole formed in the housing. The input / output terminal bolt and the internal thread portion are formed in a cylindrical body formed on the inner peripheral surface, the internal thread portion is screwed to the external thread portion and extended from the take-out hole, and the one end surface is A relay member for bringing the stator side terminal into close contact with the other surface of the fastening portion between the head and one surface of the fastening portion, and the input / output terminal bolt extending from the other end surface of the relay member. Harness side screwed into male thread and electrically connected to the input / output harness The Minaru and a, a nut member secured to the other end face of the relay member. And the three-phase fastening washer is insert-molded in the mold body so as to expose both surfaces of the fastening portion, the insulating cylinder surrounds the other surface of the fastening portion of the fastening washer of each phase, and the above-mentioned of each phase By surrounding the one end side of the relay member and projecting integrally on the other surface side of the mold body, the insulating bush made of insulating resin covers the outer periphery of the relay member by snap-fit coupling to the insulating cylinder of each phase. It is installed.

  According to this invention, since the insulating bush is attached to the insulating cylinder of each phase so as to cover the outer periphery of the relay member, there is no need to increase the drilling accuracy of the extraction hole formed in the housing, Processing costs are reduced. Further, after the relay member is fastened to the male thread portion of the input / output terminal bolt, the insulating bush can be attached to the insulating cylinder, and the assembling workability of the input / output terminal portion is improved.

Embodiment 1 FIG.
1 is a longitudinal sectional view showing a vehicular rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 2 is a view for explaining a mounting state of a harness side terminal in the vehicular rotating electrical machine according to Embodiment 1 of the present invention. 2 (a) is a front view thereof, and FIG. 2 (b) is a longitudinal sectional view thereof. 3 is a plan view showing a fan guide applied to the vehicular rotating electrical machine according to the first embodiment of the present invention, and FIG. 4 is an assembly of input / output terminal portions in the vehicular rotating electrical machine according to the first embodiment of the present invention. It is a figure explaining a method.

  1 to 3, the housing 1 is configured by disposing an aluminum front bracket 2 and a rear bracket 3 which are formed in a bowl shape relative to each other and fastening the brackets 2 and 3 with bolts 4. ing. The shaft 5 is rotatably attached to both brackets 2 and 3 via bearings 6 and 7. The pulley 8 is fixed to the extension portion of the shaft 5 from the front bracket 2 and is connected to the rotating shaft of the engine via a belt, not shown. Further, the intake holes 2a and 3a are formed in the radially outer peripheral side of the bearings 6 and 7 on the end surfaces of the front bracket 2 and the rear bracket 3, and the exhaust holes 2b and 3b are radially outer peripheral edges of the front bracket 2 and the rear bracket 3. It is drilled in the part.

  The Landel-type rotor 9 is provided so as to cover a field winding 10 that generates a magnetic flux by passing an electric current, and a pair of pole cores 11 and 12 that form magnetic poles by the magnetic flux. And. The rotor 9 is assembled so that a pair of pole cores 11 and 12 mesh with the claw-shaped magnetic pole portions, press-fitted into the shaft 5, and rotatably disposed in the housing 1. The cooling fan 13 is fixed to both end surfaces in the axial direction of the pole cores 11 and 12 press-fitted into the shaft 5.

The stator 14 includes a cylindrical stator core 15 and a stator winding 16 wound around the stator core 15. The stator 14 is attached to the housing 1 so as to surround the rotor 9 with both ends of the outer periphery of the stator core 15 being pressed between the brackets 2 and 3 by the fastening force of the bolts 4.
The slip ring 17 is fitted on the bearing 7 side of the shaft 5 and rotates together with the shaft 5. The slip ring 17 is electrically connected to the field winding 10. A pair of brushes 18 are housed in a brush holder 19 and are arranged to slide on the surface of the slip ring 17. Further, a rotor position detection device 20 that detects the relative position of the rotor 9 with respect to the stator 14 is disposed on the outer side in the axial direction of the bearing 7.

The input / output terminal bolt 25 is made of a conductive material such as iron, and includes a head portion 25a, a shaft portion 25b extending from the head portion 25a to one side, a knurled portion 25c and a shaft formed at the root portion of the shaft portion 25b. A male screw portion 25d formed in the portion 25b is provided.
The fastening washer 26 is made of a conductive material such as iron in a flat plate shape, and a through hole 26b is formed in the fastening portion 26a. The relay member 27 is made of a conductive material such as iron in a cylindrical shape, and an internal thread portion 27a is formed on the inner peripheral surface thereof. And the external shape of the one end side of the relay member 27 is a hexagon nut shape.

  The fan guide 30 as a mold body is made into a ring-shaped flat plate using, for example, polyphenylene sulfide (PPS) resin. The three fastening washers 26 are insert-molded integrally at predetermined positions of the fan guide 30 so as to expose both surfaces of the fastening portion 26a. Further, a notch 30a is formed in the fan guide 30 so that the brush holder 19 is fitted therein. Further, the insulating tube 31 is integrally projected from the back surface of the fan guide 30 so as to surround the fastening portions 26 a of the three fastening washers 26. A fitting recess 31 a for snap-fit coupling is provided in the inner wall surface of the insulating cylinder 31 so as to be opposed to the radial direction of the fan guide 30. Further, a drainage hole 31 b is formed in the fan guide 30 so as to communicate the bottom of each fitting recess 31 a radially outward with the surface side of the fan guide 30. Further, a drainage hole 31 c is formed in the insulating cylinder 31 so as to communicate the bottom of each fitting recess 31 a radially inward and the outer peripheral side of the insulating cylinder 31.

  The insulating bush 36 is made in a cylindrical shape having an inner peripheral shape that covers the relay member 27 using, for example, PPS resin. And the snap fitting part 36a fitted by the fitting recessed part 31a is extended relatively from the end of the insulation bush 36 in the positional relationship corresponding to a pair of fitting recessed part 31a.

Here, a method of attaching the input / output terminal portion will be described with reference to FIG.
First, the fan guide 30 extends the three insulating cylinders 31 from the extraction holes 32 formed in the rear bracket 3 and tightens a plurality of mounting screws (not shown) to the inner wall surface of the rear bracket 3. It is attached so as to be orthogonal to the axis of the shaft 5. At this time, the fan guide 30 inserts the brush holder 19 into the notch 30a to form a flat blade facing surface. The blade facing surface is an annular surface facing the blade of the cooling fan 13. Further, three of the plurality of mounting screws are fastened to the inner wall surface of the rear bracket 3 through the extending portions 26c of the fastening washers 26 embedded in the fan guide 30 in an electrically insulated state. Thus, the mounting strength of the fan guide 30 is increased.

  Next, the input / output terminal bolt 25 is attached to each of the fastening washers 26 by press-fitting the knurled portion 25 c into the through hole 26 b of the fastening washer 26 from the surface side of the fan guide 30. Then, the relay member 27 is fastened to the male screw portion 25d formed on the shaft portion 25b using a hexagonal nut shape on one end side. Thus, one end of the stator side terminal 33 is between the head 25a and one surface of the fastening portion 26a of the fastening washer 26 by the fastening force of the relay member 27 screwed to the male screw portion 25d of the input / output terminal bolt 25. And pressed in a surface contact state. Further, the fastening washer side end surface 27b of the relay member 27 is in contact with the other surface of the fastening portion 26a of the fastening washer 26 in a surface contact state. The three-phase lead wires 16a of the stator winding 16 are welded to the other end of the stator side terminal 33, respectively.

Next, the insulating bush 36 is snap-fit coupled to the insulating cylinder 31 by fitting the snap-fit portions 36a into the respective fitting recesses 31a. Further, the harness side terminal 34a of the input / output harness 34 is attached to the male threaded portion 25d of each input / output terminal bolt 25, and the nut 35 serving as a nut member is fastened to the male threaded portion 25d, thereby the anti-fastening washer of the relay member 27. The side end surface 27c is fastened in a surface contact state.
Here, the input / output terminal portion of each phase is constituted by the input / output terminal bolt 25, the fastening washer 26, the relay member 27, the stator side terminal 33, the nut 35, and the insulating bush 36. Further, the extending portion of the input / output terminal bolt 25 from the insulating cylinder 31 is covered with the insulating bush 36.

  In the vehicular rotating electrical machine thus configured, a current is supplied from a battery (not shown) to the field winding 10 via the brush 18 and the slip ring 17 to generate a magnetic flux. By this magnetic flux, the claw-shaped magnetic pole of one pole core 11 is magnetized to the N pole, and the claw-shaped magnetic pole of the other pole core 12 is magnetized to the S pole. On the other hand, the rotational torque of the engine is transmitted from the output shaft of the engine to the shaft 5 via the belt and the pulley 8, and the rotor 9 is rotated. Therefore, a rotating magnetic field is applied to the stator winding 16 and an electromotive force is generated in the stator winding 16. This AC electromotive force is taken out from the three-phase input / output harness 34 through the three-phase lead wire 16a, the stator side terminal 33, the fastening washer 26 and the relay member 27. The three-phase alternating current taken out via the three-phase input / output harness 34 is input to an external three-phase rectifier circuit (not shown) and rectified to direct current to charge the battery, Supplied to the load.

  When starting the engine, an alternating current is sequentially supplied from a three-phase drive circuit (not shown) to the stator winding 16 via a three-phase input / output harness 34, and the field current is supplied to the brush 18 and the slip ring 17. Is supplied to the field winding 10. The stator winding 16 and the field winding 10 serve as electromagnets, and the rotor 9 rotates in the stator 14 together with the shaft 5. The rotational force of the shaft 5 is transmitted from the pulley 8 to the engine output shaft via the belt, and the engine is started. At this time, the rotor position detection device 20 detects the rotation angle of the rotor 9. A control device (not shown) controls the alternating current that is sequentially supplied to the stator winding 16 so that the rotation direction of the rotor 9 is a constant direction and a predetermined rotation speed is obtained.

Further, in this vehicular rotating electrical machine, when the shaft 5 is rotated, the cooling fan 13 is driven to rotate together with the rotor 9. Then, by the rotation of the cooling fan 13, outside air is sucked into the housing 1 through the intake holes 2 a and 3 a.
Then, the outside air sucked from the intake hole 2a is bent in the centrifugal direction by the cooling fan 13 and discharged from the exhaust hole 2b to the outside of the housing 1. As a result, heat is absorbed by the cooling air from the front coil end of the stator winding 16 that is a heat generating component in the housing 1, and the stator 14 is cooled.

  On the other hand, the outside air sucked from the intake hole 3a flows radially inward along the brush holder 19 and the fan guide 30 and passes between the inner peripheral side of the fan guide 30 and the shaft 5 to the rotor 9 side. Flowing. The air flowing toward the rotor 9 is bent in the centrifugal direction by the cooling fan 13 and is discharged from the exhaust hole 3 b to the outside of the housing 1. As a result, heat is absorbed by the cooling air from the rear side coil end of the stator winding 16, and the stator 14 is cooled. In addition, the electrical connection between the input / output terminal bolt 25 and the stator side terminal 33 is cooled.

According to the first embodiment, since the insulating bush 36 is attached to the insulating cylinder 31 of the fan guide 30, it is not necessary to increase the hole processing accuracy of the extraction hole 32 formed in the rear bracket 3, and the hole processing is performed. Expense becomes cheap.
Further, since the insulating bush 36 is formed in an inner peripheral shape covering the relay member 27 and is attached to the insulating cylinder 31 by a snap-fit coupling method, the relay member 27 is insulated after being fastened to the male thread portion 25d of the input / output terminal bolt 25. The bush 36 can be attached to the insulating cylinder 31, and the assembling workability of the input / output terminal portion is improved. Further, since the extending portion of the input / output terminal bolt 25 from the insulating cylinder 31 is covered with the insulating bush 36, electrical insulation between the rear bracket 3 and the input / output terminal bolt 25 is ensured.

Further, since the drain hole 31b is formed to communicate the radially outer fitting recess 31a and the surface side of the fan guide 30, the water that has entered between the relay member 27 and the insulating bush 36 is fitted. It is guided to the stator 14 side through the recess 31a and the drainage hole 31b, and drained to the outside through the exhaust hole 3b. Therefore, it is possible to prevent the occurrence of ground fault between the rear bracket 3 and the electric conductive portion of the input / output terminal portion due to accumulation of mud contained in the intruding water.
Moreover, since the drainage hole 31b is formed so as to communicate the bottom of the fitting recess 31a and the surface side of the fan guide 30, the fitting recess 31a also functions as a drainage channel, and the configuration of the drainage channel is simple. It becomes.

Further, the input / output terminal bolt 25 has its male screw portion 25d extended from the take-out hole 32, and the harness side terminal 34a is screwed to the male screw portion 25d by the tightening force of the nut 35. It is fastened and fixed in surface contact. Thereby, the connection force with respect to the input / output terminal bolt 25 of the harness side terminal 34a becomes large, and the connection resistance of the relay member 27 and the harness side terminal 34a becomes small.
Therefore, even if a large current flows, heat generation at the contact point between the relay member 27 and the harness side terminal 34a is suppressed, and an increase in temperature at the connection portion is suppressed. This prevents the welding of the contact portion and the melting of the surrounding resin parts. Further, Joule loss due to current is reduced, and characteristics and efficiency are improved.

  Further, since the harness side terminal 34a is firmly connected to the relay member 27, even if the vibration of the vehicle shakes the input / output harness 34, the connecting portion between the relay member 27 and the harness side terminal 34a is worn or damaged. Is prevented.

  The stator side terminal 33 is fastened and fixed in a surface contact state between the head 25 a of the input / output terminal bolt 25 and the fastening washer 26 by the fastening force of the relay member 27. Further, the relay member 27 fastening washer side end face 27b is in contact with the fastening washer 26 in a surface contact state. Thereby, the screwing portion is excluded from the main electric conduction path from the stator side terminal 33 to the harness side terminal 34a. That is, the electrical connection portion in the main electrical conduction path is composed of a surface contact portion. Therefore, even if a large current flows, heat generation in the main electrical conduction path is suppressed, and occurrence of welding of the contact portion and melting of the resin component is surely prevented.

Further, since the input / output terminal bolt 25 and the stator side terminal 33 are firmly connected by the fastening force of the relay member 27 screwed to the male screw portion 25d, the vibration of the vehicle is input via the input / output harness 34. Even if it is transmitted to the output terminal bolt 25, the connection portion between the input / output terminal bolt 25 and the stator side terminal 33 is prevented from being worn or damaged.
Further, since the relay member 27 extends from the extraction hole 32 to the outside of the rear bracket 3, the stator side terminal 33 and the fastening washer 26 can be fastened from the outside of the housing 1. Therefore, after the stator 14 and the rotor 9 are assembled to the housing 1, the fastening operation of the stator side terminal 33 and the fastening washer 26 can be performed, and the assembling property is improved.

  Further, since the fan guide 30 is disposed so as to constitute a flat fan facing surface, wind noise due to interference between the cooling fan 13 and the fan guide 30 is reduced. Further, the cooling air bent in the centrifugal direction by the cooling fan 13 absorbs heat from the head portion 25 a of the input / output terminal bolt 25. Therefore, heat generated at the input / output terminal portion is absorbed by the cooling air via the input / output terminal bolt 25, and an excessive temperature rise is suppressed.

Further, since the insulating cylinder 31 is interposed between the relay member 27 and the take-out hole 32 so as to cover the outer periphery of the relay member 27, electrical insulation between the relay member 27 and the housing 1 is ensured. The
Further, since the insulating cylinder 31 is molded integrally with the fan guide 30, the number of parts is reduced and the assemblability is improved.
Further, since the three fastening washers 26 are molded integrally with the fan guide 30, the number of parts is reduced and the assemblability is improved.
Furthermore, since the stator side terminal 33 and the harness side terminal 34a are fastened using a single input / output terminal bolt 25, the structure of the input / output terminal portion is simplified and robust.

  In the first embodiment, the fitting recess 31a of the snap-fit coupling is provided in the inner wall surface of the insulating cylinder 31 so as to be opposed to the radial direction of the fan guide 30, and each of the fitting recesses 31a radially outward is provided. The fan guide 30 is formed with a drain hole 31b that communicates the bottom of the fan guide 30 and the surface side of the fan guide 30. However, considering the drainage of the water that has entered between the relay member 27 and the insulating bush 36, one of the fitting recesses 31 a is positioned in the ground direction when the fan guide 30 is attached to the rear bracket 3. Preferably, each insulating cylinder 31 is formed, and the drain hole 31b is formed so that the bottom of the fitting recess 31a communicates with the surface side of the fan guide 30.

  In the first embodiment, the snap fit portion 36a of the snap fit coupling is formed in the insulating bush 36 and the fitting recess 31a is formed in the insulating tube 31, but the snap fit portion is formed in the insulating tube 31. Then, the fitting recess may be formed in the insulating bush 36. In this case, the drain hole may be formed so that the bottom of the insulating cylinder 31 communicates with the surface side of the fan guide 30.

Embodiment 2. FIG.
5A and 5B are views for explaining a mounting state of a harness-side terminal in a vehicular rotating electrical machine according to Embodiment 2 of the present invention. FIG. 5A is a front view thereof, and FIG. FIG.

In FIG. 5, a C-shaped detent 36b having a notch 36c for insertion of the harness side terminal 34a is projected from the other end of the insulating bush 36A.
Other configurations are the same as those in the first embodiment.

  In the second embodiment, the insulating bush 36A is snap-fit coupled to the insulating cylinder 31 by fitting the snap-fit portions 36a into the respective fitting recesses 31a. In addition, the harness side terminal 34a of the input / output harness 34 is attached to the male threaded portion 25d of each input / output terminal bolt 25, and the nut 35 is fastened to the male threaded portion 25d so that the relay member 27 has an anti-fastening washer side end surface 27c. Fastened to surface contact. And the harness side terminal 34a is extended from the notch 36c of the rotation stop 36b. Further, the extending portion of the input / output terminal bolt 25 from the insulating cylinder 31 and the harness side terminal 34a are covered with the insulating bush 36A.

Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.
According to the second embodiment, since the rotation stopper 36b is formed at the other end of the insulating bush 36A, when the nut 35 is fastened to the male screw portion 25d, the harness side terminal 34a is prevented from being rotated. . Further, the rotation of the harness side terminal 34a after the fastening is also prevented, and the loosening of the fastening of the harness side terminal 34a is prevented. In addition, considering the mounting state of the vehicular rotating electrical machine on the vehicle, the assembly direction of the input / output harness 34 can be set to an optimum direction by changing the positions of the notches 34c in the three insulating bushes 36A. .

Embodiment 3 FIG.
6A and 6B are views for explaining the structure of an insulating bush in a vehicular rotating electrical machine according to Embodiment 3 of the present invention. FIG. 6A is a side view thereof, and FIG. 6B is a rear view thereof. is there. FIG. 7 is a plan view showing a fan guide applied to a vehicular rotating electrical machine according to Embodiment 3 of the present invention.

In FIG. 6, an anti-rotation protrusion 36d protrudes from a position between the snap fit parts 36a at one end of the insulating bush 36B.
In FIG. 7, a fitting groove 31d into which the rotation preventing projection 36d is fitted is recessed in the insulating tube 31 of the fan guide 30A.
Other configurations are the same as those in the second embodiment.

  In the third embodiment, the insulating bush 36B is snap-fit coupled to the insulating cylinder 31 by fitting the snap-fit portions 36a into the respective fitting recesses 31a. At this time, the rotation preventing projection 36d is fitted into the fitting groove 31d. In addition, the harness side terminal 34a of the input / output harness 34 is attached to the male threaded portion 25d of each input / output terminal bolt 25, and the nut 35 is fastened to the male threaded portion 25d so that the relay member 27 has an anti-fastening washer side end surface 27c. Fastened to surface contact. And the harness side terminal 34a is extended from the notch 36c of the rotation stop 36b. Further, the extending portion of the input / output terminal bolt 25 from the insulating cylinder 31 and the harness side terminal 34a are covered with the insulating bush 36B.

Therefore, also in the third embodiment, the same effect as in the second embodiment can be obtained.
According to the third embodiment, the rotation preventing projection 36d of the insulating bush 36B is fitted into the fitting groove 31d formed in the insulating cylinder 31 of the fan guide 30A. Movement is blocked. Therefore, when the nut 35 is fastened to the male screw portion 25d, the rotation of the insulating bush 36B is prevented, so the rotation of the harness side terminal 34a is reliably prevented. Further, since the rotation of the insulating bush 36B after the fastening is prevented, the turning of the harness side terminal 34a is prevented, and the occurrence of loose fastening of the harness side terminal 34a is surely prevented.

In the third embodiment, the anti-rotation protrusion 36d is formed on the insulating bush 36B and the fitting groove 31d is formed on the insulating cylinder 31, but the anti-rotation protrusion is formed on the insulating cylinder 31. The fitting groove may be formed in the insulating bush.
In each of the above embodiments, the drain hole 31b is formed to communicate with the bottom of the fitting recess 31a and the surface side of the fan guide 30. However, the drain hole 31b is formed at the bottom of the insulating cylinder 31. And the fan guide 30 may be formed so as to communicate with each other.
Further, in each of the above embodiments, if the three insulating bushes 36B are made with colors that specify the U-phase, V-phase, and W-phase, erroneous assembly of the U-phase, V-phase, and W-phase input / output harnesses 34 is prevented. can do.

It is a longitudinal cross-sectional view which shows the rotary electric machine for vehicles which concerns on Embodiment 1 of this invention. It is a figure explaining the attachment state of the harness side terminal in the rotary electric machine for vehicles which concerns on Embodiment 1 of this invention. It is a top view which shows the fan guide applied to the rotary electric machine for vehicles which concerns on Embodiment 1 of this invention. It is a figure explaining the assembly method of the input-output terminal part in the rotary electric machine for vehicles which concerns on Embodiment 1 of this invention. It is a figure explaining the attachment state of the harness side terminal in the rotary electric machine for vehicles which concerns on Embodiment 2 of this invention. It is a figure explaining the structure of the insulation bush in the rotary electric machine for vehicles which concerns on Embodiment 3 of this invention. It is a top view which shows the fan guide applied to the rotary electric machine for vehicles which concerns on Embodiment 3 of this invention.

Explanation of symbols

  1 Housing, 5 Shaft, 9 Rotor, 13 Cooling Fan, 14 Stator, 15 Stator Iron Core, 16 Stator Winding, 16a Lead Wire, 25 Input / Output Terminal Bolt, 25a Head, 25b Shaft, 25c Knurl , 25d male thread part, 26 fastening washer, 26a fastening part, 26b through hole, 27 relay member, 30 fan guide (molded body), 31 insulating cylinder, 31a fitting recess, 31b drainage hole, 31d fitting groove, 32 take-out hole , 33 Stator side terminal, 34 I / O harness, 34a Harness side terminal, 35 Nut (nut member), 36, 36A, 36B Insulating bush, 36a Snap fit part, 36b Non-rotating part, 36d Non-rotating projection part.

Claims (5)

A housing, a rotor fixed to a shaft rotatably supported by the housing and disposed in the housing, and a stator core disposed so as to surround the rotor via a predetermined air gap And a stator having a stator winding wound around the stator core, a three-phase stator side terminal to which the three-phase lead wire of the stator winding is connected, and the three-phase stator In a rotating electrical machine for a vehicle provided with a three-phase input / output terminal portion for connecting a side terminal and a three-phase input / output harness,
The above input / output terminals for each phase are
A fastening washer having a fastening portion and a through hole bored in the fastening portion;
A head portion, a shaft portion extending on one side of the head portion, a knurl portion formed at the base portion of the shaft portion, and a male screw portion formed at the shaft portion, and the knurling portion of the fastening portion An input / output terminal bolt that is press-fitted into a through-hole and extends from a take-out hole in which the shaft portion is formed in the housing;
An internal thread portion is formed on a cylindrical body formed on the inner peripheral surface, the internal thread portion is screwed onto the external thread portion and extended from the take-out hole, and one end surface is brought into close contact with the other surface of the fastening portion. A relay member for fastening the stator side terminal between the head and one surface of the fastening portion;
A nut member that fastens a harness-side terminal that is screwed to a male thread portion of the input / output terminal bolt that extends from the other end surface of the relay member and is electrically connected to the input / output harness to the other end surface of the relay member. And comprising
The three-phase fastening washer is insert molded into the mold body so as to expose both sides of the fastening portion,
An insulating cylinder surrounds the other surface of the fastening portion of the fastening washer of each phase, and surrounds one end side of the relay member of each phase and is integrally projected on the other surface side of the mold body,
A vehicular rotating electrical machine, wherein an insulating bush made of an insulating resin is attached to the insulating cylinder of each phase by snap-fit coupling so as to cover the outer periphery of the relay member.   The rotating electrical machine for a vehicle according to claim 1, wherein a detent of the harness side terminal is formed on the insulating bush.   An anti-rotation protrusion is formed on one of the insulating bush and the insulating cylinder, and a fitting groove is formed on one of the insulating bush and the insulating cylinder, and the anti-rotation protrusion is formed on the fitting groove. The rotating electrical machine for a vehicle according to claim 1 or 2, wherein the rotation of the insulating bush with respect to the insulating cylinder is restricted by being inserted.   The vehicular rotating electrical machine according to any one of claims 1 to 3, wherein the three-phase insulating bushes are made of different colors.   A snap fit portion is formed in the insulating bush, a fitting recess is formed in the insulating cylinder, and a drainage hole is formed in the mold body so as to communicate the bottom of the fitting recess and one surface side of the mold body. The rotating electrical machine for a vehicle according to any one of claims 1 to 4, wherein the rotating electrical machine for a vehicle is provided.

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