JP2013027118A - Stator and rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a stator which can ensure satisfactory operational efficiency, and prevent engine oil leak and air leak during an airtightness test by sealing a clearance between a core wire of a lead wire and an insulation coating; and a rotary electric machine with the stator.SOLUTION: A stator comprises: a stator core 17 having a plurality tooth 16; an armature coil 18 wound around the tooth 16; and a lead wire 19 comprised of a core wire 19a and an insulation coating 19b that coats the core wire 19a. The core wire 19a of the lead wire 19 and the armature coil 18 are connected to each other. An end part in the axial direction of the stator core 17 includes a storage recess 45 for storing a boundary part 19d of a terminal part 19c between the insulation coating 19b and the core wire 19a. The storage recess 45 has a function as a filling part 50 for filling a sealing member 47 that seals the boundary part 19d.

Description

  The present invention relates to a stator and a rotating electrical machine including the stator.

  A generator (rotary electric machine) having a magnet is used for a motorcycle. This generator includes a bottomed cylindrical rotor linked to a crankshaft of a motorcycle engine, and a stator fixed to the inside of the engine case. A magnet is provided on the inner peripheral surface side of the rotor, and teeth on which a plurality of armature coils are wound are provided on the stator so as to correspond to the magnets. The amount of magnetic flux passing through the teeth changes as the rotor rotates, and this becomes an electromotive force so that current flows through the armature coil.

  The current flowing through the armature coil is stored in the battery via the power generation output lead wire by connecting the terminal portions of the armature coil and the power generation output lead wire, or power is supplied to the attached electric equipment. It is used for applications such as The armature coil and the power generation output lead wire are coupled by, for example, superposing and soldering the terminal portions of the respective ends or crimping using a crimping sleeve.

  By the way, the generator mentioned above is immersed in engine oil in the case of an engine. At this time, due to the pressure difference between the inside and outside of the engine, the inside of the power generation output lead wire becomes negative pressure, and the engine oil may flow into the gap between the core wire of the power generation output lead wire and the insulating coating. Then, the engine oil that has flowed into the power generation output lead wire may propagate inside the power generation output lead wire and leak from the connection portion of the power generation output lead wire drawn out of the engine to the outside of the engine. is there.

  In addition, in a finished product inspection that is usually performed after assembly of the engine, an air tightness test is performed to confirm the internal air tightness of the engine. At this time, air leakage may occur from the gap between the core wire of the power generation output lead wire and the insulation coating. When performing the airtightness test, if the airtightness of the generator is not secured, even if air leakage from the engine can be confirmed, the air leakage is from the power generation output lead wire of the generator, It is difficult to determine whether the air leaks from other parts, and there is a problem that it is difficult to specify the target part of the air leak.

  In order to solve the above-described problem, in Patent Document 1, a joint portion where the terminal portion of the armature coil and the terminal portion of the power generation output lead wire are electrically connected is covered with an insulating tube. Then, at least the end portion on the distal end side of the coupling portion in the insulating tube is sealed with a seal member.

  According to the prior art, since the sealing performance between the insulating tube and the coupling portion can be improved, the gap between the core wire of the power generation output lead wire and the insulating coating is propagated from the coupling portion, and the power generation output lead wire is transmitted. It is said that the engine oil can be prevented from reaching the end connection. Further, it is said that air leakage from the power generation output lead wire can be prevented during the airtightness test.

JP 2009-189156 A

However, the following problems remain in the conventional technology described above.
In the prior art, since a sealing member such as silicon resin is pushed into the insulating tube and sealed, the work is complicated and there is a risk that the number of work steps may be increased.
In addition, since the sealing member is applied to the joint portion in the insulating tube and sealed, the application amount and application area of the sealing member may vary, and the gap between the core wire and the insulating coating may not be reliably sealed. .

Further, a method of applying a seal member to the boundary portion between the covering member of the power generation output lead wire and the core wire to seal the gap is conceivable. However, as in the case of applying the grease of the prior art, there is a possibility that the gap may not be sealed due to variations in the application amount and application area of the seal member. Furthermore, the lead wire for power generation output flutters when the seal member is applied, which may make the work complicated and increase the number of work steps.
Moreover, it is conceivable to prevent leakage of engine oil and air leakage during an airtightness test by adopting a power generation output lead wire having high adhesion between the core wire and the insulation coating. However, such highly adhesive lead wires are generally expensive.

  Therefore, the present invention includes a stator capable of ensuring good workability and sealing a gap between the lead wire core and the insulation coating to prevent leakage of engine oil and air leakage during an airtightness test, and the stator. The issue is to provide rotating electrical machines.

  In order to solve the above problems, a stator according to claim 1 of the present invention is wound around a stator core including a plurality of teeth extending from the stator main body portion along the radial direction of the stator main body portion, and the teeth. An armature coil, a core wire, and a lead wire constituted by an insulating coating covering the core wire, and the terminal portion of the lead wire has the insulating coating removed and the core wire is exposed. In the stator in which the exposed core wire and the armature coil are connected and the electric power generated by the armature coil is output to the outside, the axial end of the stator core is connected to the end of the terminal portion. An accommodation recess for accommodating a boundary portion between the insulation coating and the core wire is provided, and the function as a filling portion for filling the accommodation recess with a seal member for sealing the boundary portion is also provided. It is characterized in that was.

According to the present invention, it is possible to prevent the lead wire from fluttering when the filling member is filled with the seal member by accommodating the terminal portion of the lead wire in the accommodating recess formed in the axial end portion of the stator core. Therefore, good workability can be ensured when the sealing member is filled in the boundary portion between the insulation coating of the lead wire and the core wire.
In addition, by arranging the boundary between the insulation coating and the core wire in the housing recess and filling the seal member so as to embed the housing recess and the boundary, the filling amount of the seal member and the variation in the filling area are suppressed. it can. As a result, the gap between the core wire of the lead wire and the insulation coating can be sealed, so that leakage of engine oil and air leakage during an airtightness test can be prevented.

  The stator according to claim 2 of the present invention is characterized in that an insulator for insulating the tooth and the armature coil is attached to the stator core, and the accommodating recess is formed in the insulator. It is said.

  According to the present invention, by forming the housing recess in the insulator, the housing recess can be formed at low cost without adding parts or the like. Further, the housing recess can be formed with high accuracy by injection molding or the like.

  Further, in the stator according to claim 3 of the present invention, the insulator is provided with a standing wall portion extending along the circumferential direction of the stator body portion on the axial end surface side of the stator body portion, and the standing wall The accommodation recess is formed at the tip of the part so as to communicate the outer diameter side surface and the inner diameter side surface of the standing wall portion.

  According to the present invention, since the housing recess is formed in the standing wall portion standing from the axial end surface of the stator body, the housing recess does not protrude in the radial direction of the stator core. Therefore, the diameter of the stator can be reduced, and interference with other parts around the stator can be prevented. Further, by forming the housing recess at the tip of the standing wall, the seal member can be filled by easily and reliably arranging the boundary portion of the lead wire in the housing recess from the axial direction. Therefore, good workability can be ensured when filling the seal member.

  Further, the stator according to claim 4 of the present invention is characterized in that the thickness of the portion corresponding to the receiving recess of the standing wall portion is formed thicker than the other portions.

  According to the present invention, it is possible to secure a large volume of the housing recess by thickening the region corresponding to the housing recess in the standing wall. Thereby, the boundary part of a lead wire can be arrange | positioned easily and reliably in an accommodation recessed part, and a sufficient quantity of sealing members can be filled. Therefore, the gap between the lead wire core wire and the insulation coating can be reliably sealed, so that leakage of engine oil and air leakage during an airtightness test can be prevented.

  Further, in the stator according to claim 5 of the present invention, the inner side surface of the receiving recess is provided with a ridge portion on the inner side and the outer side in the radial direction, and the separation distance in the circumferential direction of the ridge portion is the insulating coating. It is characterized by being set to be narrower than the diameter.

According to the present invention, by providing the protrusions on the inner side and the outer side in the radial direction on the inner side surface of the receiving recess, the gap between the lead wire and the receiving recess on the inner and outer sides in the radial direction can be narrowed. Accordingly, when the sealing member is filled in the filling portion, leakage of the sealing member from the inside and outside in the radial direction of the housing recess can be suppressed.
Further, by setting the separation distance in the circumferential direction of the ridges to be narrower than the diameter of the insulation coating, the insulation coating of the lead wire can be held and held on the ridges of the housing recesses. Thereby, it is possible to reliably prevent the lead wire from fluttering when the sealing member is filled in the filling portion. Therefore, good workability can be ensured when the sealing member is filled in the boundary portion between the insulation coating of the lead wire and the core wire.

  Further, in the stator according to claim 6 of the present invention, a retaining protrusion for preventing the lead wire from coming out of the housing recess is formed on the opening side of the tip portion on the inner surface of the housing recess. It is characterized by being provided.

According to the present invention, by forming the retaining protrusion on the opening edge on the distal end portion side of the housing recess, after the lead wire is disposed in the housing recess, the boundary portion of the lead wire is pulled out from the opening on the distal end side. Can be prevented. Therefore, the lead wire can be reliably prevented from fluttering when the sealing member is filled in the filling portion, and good workability can be ensured.
Further, even when the vehicle is running after being mounted on the vehicle, it is possible to prevent the boundary portion of the lead wire from coming out of the opening on the tip end side without imposing a burden on the seal member. Therefore, the boundary portion of the lead wire can be reliably sealed to prevent the engine oil from leaking, and a stator with high durability and reliability can be obtained.

  According to a seventh aspect of the present invention, there is provided a rotating electrical machine that is rotatably provided to the stator on the outer side in the radial direction of the stator, and includes a rotor having a plurality of magnets facing the teeth in the radial direction. It is characterized by having.

  According to the present invention, since a stator that can ensure good workability and can prevent engine oil leakage and air leakage during an airtightness test is applied to the rotating electrical machine, a low-cost and highly reliable rotating electrical machine is provided. can get.

According to the present invention, it is possible to prevent the lead wire from fluttering when the filling member is filled with the seal member by accommodating the terminal portion of the lead wire in the accommodating recess formed in the axial end portion of the stator core. Therefore, good workability can be ensured when the sealing member is filled in the boundary portion between the insulation coating of the lead wire and the core wire.
In addition, by arranging the boundary between the insulation coating and the core wire in the housing recess and filling the seal member so as to embed the housing recess and the boundary, the filling amount of the seal member and the variation in the filling area are suppressed. it can. As a result, the gap between the core wire of the lead wire and the insulation coating can be sealed, so that leakage of engine oil and air leakage during an airtightness test can be prevented.

It is a top view of the rotary electric machine of an embodiment. It is side surface sectional drawing of the rotary electric machine of embodiment. It is an enlarged view of the area | region S of FIG. FIG. 6 is a connection circuit diagram when a rotating electrical machine is applied to a motorcycle. It is a top view of an insulator. FIG. 4 is a view taken in the direction of arrow B in FIG. 3. It is explanatory drawing of the accommodation recessed part in the 1st modification of embodiment, FIG.7 (a) is explanatory drawing when it sees from an axial direction, FIG.7 (b) is C arrow directional view of Fig.7 (a). It is. It is explanatory drawing of the accommodation recessed part in the 2nd modification of embodiment, Fig.8 (a) is explanatory drawing when it sees from an axial direction, FIG.8 (b) is D arrow line view of Fig.8 (a). It is. It is explanatory drawing of the accommodation recessed part in the 1st modification of embodiment, FIG.9 (a) is explanatory drawing when it sees from an axial direction, FIG.9 (b) is E arrow line view of Fig.9 (a). It is.

Below, the rotary electric machine of embodiment of this invention is demonstrated with reference to FIG. 1 and FIG.
As shown in FIG. 1, the rotating electrical machine 1 is an outer rotor type generator used in, for example, a motorcycle, and includes a rotor 3 fixed to the tip of a flywheel 2 that rotates in synchronization with an engine crankshaft (not shown). And a stator 4 fixed to an engine block (not shown).

As shown in FIG. 2, the flywheel 2 is a member having a substantially disc-shaped main body, and a boss portion 2 a is formed to protrude in the center. A through hole 2b having a key groove 2c is formed at the center of the boss 2a. A crankshaft is inserted into the through hole 2b, and is fixed by a nut or the like in a state where relative rotation between the flywheel 2 and the crankshaft is restricted using a key (not shown).
An insertion hole 2d penetrating along the axial direction is formed in the main body of the flywheel 2. A rivet 27 for fixing the flywheel 2 and a rotor 3 to be described later is inserted through the insertion hole 2d.

(Rotor)
The rotor 3 has a bottomed cylindrical rotor yoke 30 formed of a metal member such as iron. A through hole 31 b is formed in the center of the bottom wall 31 of the rotor yoke 30. The boss 2a and the crankshaft of the flywheel 2 are inserted into the through hole 31b.
Further, a plurality of insertion holes 32 penetrating the bottom wall 31 in the axial direction are formed in the bottom wall 31 of the rotor yoke 30 at substantially equal intervals along the circumferential direction. The insertion hole 32 is formed coaxially with the insertion hole 2 d of the flywheel 2. The rivet 24 is inserted into the insertion hole 32 of the rotor yoke 30 and the insertion hole 2d of the flywheel 2, and the rotor 3 and the flywheel 2 are fixed by crimping both ends of the rivet 27 from the axial direction.
Thereby, the rotor 3 and the flywheel 2 are fastened and fixed in a state where relative rotation is restricted, and the rotor 3 can rotate in synchronization with the rotation of the crankshaft.

  As shown in FIG. 1, the peripheral wall 33 of the rotor yoke 30 is provided with a plurality of magnets 8 (four in this embodiment) on the inner peripheral surface side. Each magnet 8 has three magnetic poles alternately magnetized along the circumferential direction. And when the four magnets 8 are arrange | positioned along the circumferential direction, the magnetic pole of the inner peripheral side of the magnet 8 is arrange | positioned so that N pole and S pole may become alternate. That is, the four magnets 8 form 12 magnetic poles along the circumferential direction. For example, a ferrite magnet is used as the magnet 8 and is fixed to the peripheral wall 33 of the rotor yoke 30 with an adhesive, for example. The magnet 8 is spaced apart from the tip of a tooth 16 to be described later so as to secure a predetermined air gap, and is disposed in a state of being opposed in the radial direction.

(Stator)
The stator 4 has a stator core 17 disposed inside the peripheral wall 33 of the rotor yoke 30. The stator core 17 is formed by laminating plate members such as electromagnetic steel plates in the axial direction, and includes an annular stator main body portion 17a.
An escape hole 17b is formed in the center of the stator main body 17a in order to avoid interference with the boss 2a of the flywheel 2 and the crankshaft. Further, a plurality of bolt insertion holes 20 are formed in the stator body portion 17a along the circumferential direction for inserting bolts (not shown) to fasten and fix the stator 4 to the engine block.

  Further, the stator core 17 has a plurality of teeth (12 in this embodiment). The teeth 16 extend radially from the stator body portion 17a and extend along the radial direction of the stator body portion 17a, and 12 teeth 16 are formed at equal intervals in the circumferential direction. And the front-end | tip of the teeth 16 is the state facing the magnet 8 provided in the surrounding wall 33 of the rotor yoke 30 in radial direction. In addition, an insulator 40 (described later) is attached to the stator core 17, and an armature coil 18 is wound around each tooth 16 via the insulator 40.

  As shown in FIG. 1, the armature coil 18 is formed by winding a conductive wire made of copper or the like around a tooth 16. The terminals (one terminal 18a and the other terminal 18b) of the armature coil 18 are led out in the vicinity of the drawing position of the harness 26 that supplies the generated current to the outside.

The harness 26 includes two lead wires 19 (19 </ b> A and 19 </ b> B) and extends outward along the extending direction of the teeth 16 of the stator 4.
FIG. 3 is an enlarged view of the region S in FIG.
As shown in FIG. 3, the lead wire 19 includes a core wire 19a formed of a stranded wire such as copper and an insulating coating 19b covering the core wire 19a. The insulating coating 19b is formed of a material excellent in oil resistance and heat resistance, such as cross-linked polyethylene. In the end portion 19c of the lead wire 19, the insulation coating 19b is removed, and the core wire 19a is exposed. A boundary portion 19d between the insulating coating 19b and the core wire 19a is formed at the terminal portion 19c of the lead wire 19.

  As shown in FIG. 1, one end 18a of the armature coil 18 and one lead wire 19A are electrically connected via a terminal 14 provided in an insulator 40 described later. The other end 18 b and the other lead wire 19 B of the armature coil 18 are electrically connected to the ground terminal 15.

As shown in FIG. 3, the ground terminal 15 is a flat metal member and is provided on the main surface of the stator main body portion 17 a on the inner side in the radial direction than the teeth 16. The ground terminal 15 includes a terminal joint portion 15a erected along the axial direction, and a terminal main body portion 15b that contacts the main surface of the stator main body portion 17a.
The other end 18b of the armature coil 18 and the other lead wire 19B are joined to the terminal joining portion 15a by, for example, solder 48 or the like.
Further, a fastening hole 15c (see FIG. 1) is formed in the terminal main body portion 15b. When the stator 4 is fastened and fixed to the engine block, the ground terminal 15 is fastened together with the stator main body portion 17a via the fastening hole 15c. Thereby, the terminal 18b on the other side of the armature coil 18 and the other lead wire 19B are connected to the ground via the ground terminal 15, the stator core 17 and the engine block.

(Connection circuit)
In the rotating electrical machine 1 having the above-described configuration, power is generated as follows.
When the engine is started, the rotor 3 fixed to the tip of the flywheel 2 rotates outside the stator 4 in synchronization with the rotation of the crankshaft and the flywheel 2. At this time, the magnet 8 fixed to the inner peripheral surface of the peripheral wall 33 of the rotor rotates together with the rotor 3 while facing the tip of the tooth 16 in the radial direction. As a result, the magnetic flux generated from the magnet 8 and passing through the armature coil 18 changes with time. Due to this change in magnetic flux, an induced electromotive force is generated in the armature coil 18, and an alternating current flows through the armature coil 18 to generate power.

FIG. 4 is a connection circuit diagram when the rotating electrical machine 1 is applied to a motorcycle.
As shown in FIG. 1, the current flowing through each armature coil 18 is supplied to the outside through the lead wire 19 by connecting the armature coil 18 (18a) and the lead wire 19 (19A). .
Specifically, as shown in FIG. 4, the rotating electrical machine 1 is electrically connected to a load L and a battery B via a lead wire 19 (see FIG. 1) and a regulator R, and the armature coil 18. The electric power generated at is supplied to the load L and the battery B.

  The regulator R has a function of converting an alternating current generated from the rotating electrical machine 1 into a direct current. Furthermore, the regulator R has a function of controlling the current supply amount so that the battery B is not overcharged even when the amount of power generation from the rotating electrical machine 1 becomes excessive. The load L is, for example, an electric load such as a tail lamp, turn signal lamp, or horn of a motorcycle.

  The alternating current generated from the rotating electrical machine 1 is converted into direct current by the regulator R and then supplied to the load L. The regulator R is connected to the battery B and charges the battery B so as not to be overcharged. As described above, the rotating electrical machine 1 is electrically connected to the load L and the battery B through the regulator R, whereby electric power is supplied from the rotating electrical machine 1 to the load L and the battery B is charged. .

Here, on the outer side in the radial direction of the terminal joint portion 15 a to which the armature coil 18 and the lead wire 19 are connected, a boundary portion 19 d between the insulating coating 19 b and the core wire 19 a is an accommodation recess 45 formed in the insulator 40. Is housed in.
Hereinafter, the insulator 40 and the housing recess 45 formed in the insulator 40 will be described in detail.

(Insulator)
As shown in FIG. 2, the insulator 40 is formed of an insulating member such as a resin, and is used for electrical insulation between the teeth 16 of the stator core 17 and the armature coil 18 wound around the teeth 16. It is.

The insulator 40 is attached to the outer surface of the stator core 17 so as to cover the periphery of the teeth 16. The insulator 40 has a two-part structure. The first insulator 40A covers the stator core 17 from one end side in the axial direction (right side in FIG. 2), and the stator core 17 from the other end side in the axial direction (left side in FIG. 2). And a second insulator 40B for covering.
The first insulator 40A and the second insulator 40B are formed in the same shape. Therefore, in the following description, the first insulator 40A (hereinafter simply referred to as “insulator 40A”) is described, and the description of the second insulator 40B is omitted.

FIG. 5 is a plan view of the insulator 40A.
The insulator 40 </ b> A includes a bobbin portion 41 formed at a position corresponding to the teeth 16.
The bobbin portion 41 includes a winding drum protecting portion 41 a that covers the outer peripheral surface of the tooth 16, and a tooth protecting portion 41 b that covers the tip side of the tooth 16. The winding drum protection part 41a is formed in a substantially U-shaped cross section. The tooth protection portion 41b is formed in a flange shape so as to be orthogonal to the winding drum protection portion 41a at the tip edge portion of the winding drum protection portion 41a.

The plurality of bobbin portions 41 are connected at the base end side by the standing wall portion 43.
As shown in FIG. 2, the standing wall 43 is erected so as to be orthogonal to the axial end surface of the stator body 17 a (see FIG. 1). The standing wall portion 43 is formed in a substantially regular dodecagonal shape when viewed from the axial direction, and extends along the circumferential direction of the stator body portion 17a.

As shown in FIG. 5, the insulator 40 </ b> A includes a terminal holding portion 44 that holds the terminal 14 (see FIG. 1) that electrically connects the lead wire 19 and the armature coil 18.
The terminal holding portion 44 is formed on the inner peripheral side of the standing wall portion 43 and on both sides in the circumferential direction with the bobbin portion 41 on which the harness 26 (see FIG. 1) is disposed. The terminal holding portion 44 is formed so as to penetrate the stator core 17 when the insulator 40A and the insulator 40B are attached to the stator core 17. Inside the terminal holding portion 44, the terminal 14 is disposed in a state of passing through the stator core 17 along the axial direction and being electrically insulated from the stator core 17 by the insulators 40A and 40B.

(Accommodating recess)
As shown in FIG. 3, an accommodation recess 45 is formed at the distal end 43 a of the standing wall 43 so as to communicate the outer diameter side 43 b and the inner diameter side 43 c of the standing wall 43.
The housing recess 45 is seen from the radial direction by a bottom 46 formed on the stator core 17 side, an inner surface 45a erected along the axial direction from the bottom 46, and an opening 45b formed on the tip 43a side. It is formed in a substantially U shape. The housing recess 45 is formed on the radially outer side of the terminal joint 15a that joins the ground terminal 15 and the other lead wire 19B.

  The width of the opening 45b of the housing recess 45 (that is, the separation distance of the inner surface 45a in the circumferential direction) is set to be slightly larger than the diameter of the lead wire 19B. Further, the depth of the accommodating recess 45 is set to be sufficiently deeper than the diameter of the lead wire 19B. The lead wire 19B is disposed in the housing recess 45 so that the boundary portion 19d between the insulating coating 19b and the core wire 19a is located between the outer diameter side surface 43b and the inner diameter side surface 43c of the housing recess 45. ing.

The housing recess 45 is filled with a seal member 47 that seals the boundary portion 19d of the lead wire 19B. The seal member 47 is formed of a material excellent in oil resistance and heat resistance such as silicon resin.
The seal member 47 is filled so as to embed the accommodating recess 45 and the boundary portion 19d of the lead wire 19B. Thereby, the boundary portion 19d of the lead wire 19B is covered with the seal member 47 over the entire circumference, and the gap between the insulating coating 19b of the lead wire 19B and the core wire 19a is sealed.

6 is a view taken in the direction of arrow B in FIG.
As shown in FIG. 6, the seal member 47 is filled in the housing recess 45 so as to close the space between the insulating coating 19 b of the lead wire 19 </ b> B and the inner surface 45 a of the housing recess 45. As a result, the lead wire 19 </ b> B is accommodated in a state of being fixed and held in the accommodating recess 45 by the seal member 47.
As described above, the housing recess 45 functions as a filling portion 50 for filling the seal member 47.

  Further, as shown in FIG. 3, a coil placement recess 49 is formed in the distal end portion 43 a of the standing wall 43 adjacent to the housing recess 45 in the circumferential direction. Similarly to the housing recess 45, the coil placement recess 49 is formed so as to communicate the outer diameter side surface 43b and the inner diameter side surface 43c of the standing wall portion 43. A terminal 18b on the other side of the armature coil 18 is inserted and disposed in the coil placement recess 49. The terminal 18 b on the other side of the armature coil 18 is electrically connected to the ground terminal 15 provided on the inner diameter side of the coil placement recess 49.

(Filling of seal member)
Subsequently, filling of the seal member 47 will be described below with reference to FIG.
First, the boundary portion 19d between the insulating coating 19b of the other lead wire 19B and the core wire 19a is disposed in the housing recess 45. Specifically, the boundary portion 19d is disposed in the housing recess 45 so that the boundary portion 19d is positioned between the outer diameter side surface 43b and the inner diameter side surface 43c of the standing wall portion 43 (see FIG. 6).

  Subsequently, the core wire 19 a at the tip of the boundary portion 19 d is joined to the terminal joint portion 15 a of the ground terminal 15. The joining of the core wire 19a and the ground terminal 15 is performed using, for example, solder 48. At this time, the lead wire 19 is housed in the housing recess 45, thereby suppressing fluttering and displacement within the housing recess 45.

  Subsequently, a sealing member 47 such as silicon is filled into the housing recess 45 from the opening 45 b of the housing recess 45. Specifically, the sealing member 47 is filled so as to embed the accommodating recess 45 and the boundary portion 19d while covering the entire boundary portion 19d between the insulating coating 19b and the core wire 19a. At this time, the seal member 47 enters between the gap between the insulating coating 19b and the core wire 19a and between the inner side surface 45a of the housing recess 45 and the insulating coating 19b of the lead wire 19B.

  Finally, after the sealing member 47 is filled, the sealing member 47 is put into a drying furnace, for example, and dried to be solidified. Thereby, the gap between the insulating coating 19b and the core wire 19a in the boundary portion 19d is sealed by the seal member 47. The lead wire 19B is fixed and held in the housing recess 45 by a seal member 47 that has entered the gap between the inner surface 45a of the housing recess 45 and the insulating coating 19b of the lead wire 19B.

(effect)
According to the present embodiment, when the terminal portion 19c of the lead wire 19B is accommodated in the accommodating recess 45 formed at the axial end of the stator core 17, the lead wire 19B is filled when the sealing member 47 is filled in the filling portion 50. Can prevent fluttering. Therefore, when the sealing member 47 is filled in the boundary portion 19d between the insulating coating 19b of the lead wire 19B and the core wire 19a, good workability can be ensured.
Further, by arranging the boundary portion 19d between the insulating coating 19b and the core wire 19a in the housing recess 45 and filling the seal member 47 so as to embed the housing recess 45 and the boundary portion 19d, the filling amount of the seal member 47 and The occurrence of variations in the filling area can be suppressed. Thereby, since the clearance gap between the core wire 19a of the lead wire 19B and the insulation coating 19b can be sealed, leakage of engine oil and air leakage during an airtightness test can be prevented.

  Further, according to the present embodiment, by forming the housing recess 45 in the insulator 40, the housing recess 45 can be formed at a low cost without adding components or the like. Further, the housing recess 45 can be formed with high accuracy by injection molding or the like.

  Further, according to the present embodiment, since the housing recess 45 is formed in the standing wall portion standing from the axial end surface of the stator main body portion 17 a, the housing recess 45 may protrude in the radial direction of the stator core 17. Absent. Therefore, the diameter of the stator 4 can be reduced, and interference with other parts around the stator 4 can be prevented. Further, by forming the accommodating recess 45 in the tip 43a of the standing wall 43, the boundary portion 19d of the lead wire 19B can be easily and reliably disposed in the accommodating recess 45 from the axial direction and can be filled with the seal member 47. Therefore, good workability can be ensured when the seal member 47 is filled.

  Further, according to this embodiment, the stator 4 that can ensure good workability and can prevent engine oil leakage and air leakage during the airtightness test is applied to the outer rotor type rotating electrical machine 1. Thus, the outer rotor type rotating electrical machine 1 with high reliability can be obtained.

(First modification of the embodiment, the periphery of the housing recess is formed thick)
Then, the accommodation recessed part 45 of the 1st modification of embodiment is demonstrated.
FIG. 7 is an explanatory view of the housing recess 45 in the first modified example of the embodiment, FIG. 7 (a) is an explanatory view when viewed from the axial direction, and FIG. 7 (b) is FIG. 7 (a). FIG.
In the embodiment, the wall thickness of the standing wall portion 43 corresponding to the housing recess 45 is formed to be the same as the wall thickness of the standing wall portion 43 in other places. On the other hand, in the 1st modification, it differs from embodiment by the point by which the thickness of the standing wall part 43 corresponding to the accommodation recessed part 45 is formed thicker than the other location. Note that detailed description of the same components as those in the embodiment is omitted.

  As shown in FIG. 7A, the standing wall portion 43 around the accommodation recess 45 has an inner diameter side surface 43c protruding from the inner diameter side to form a thick portion 45c. Thereby, the dimension of the filling part 50 in the radial direction is set to a thickness obtained by adding the thick part 45 c to the standing wall part 43. Further, in the standing wall portion 43, the region other than the thick portion 45 c is formed thinner than the radial dimension of the filling portion 50.

  According to the first modification of the embodiment, the area of the standing wall portion 43 corresponding to the housing recess 45 is thick, so that the volume of the housing recess 45 can be secured widely. Thereby, the boundary portion 19d of the lead wire 19B can be easily and reliably disposed in the housing recess 45, and a sufficient amount of the seal member 47 can be filled. Accordingly, the gap between the core wire 19a of the lead wire 19B and the insulating coating 19b can be reliably sealed, and therefore, leakage of engine oil and air leakage during an airtightness test can be prevented.

(Second modification of the embodiment, forming the opening width of the housing recess narrow)
Then, the accommodation recessed part 45 of the 2nd modification of embodiment is demonstrated.
FIG. 8 is an explanatory view of the housing recess 45 in the second modification of the embodiment, FIG. 8 (a) is an explanatory view when viewed from the axial direction, and FIG. 8 (b) is FIG. 8 (a). FIG.
In the embodiment and the first modification, the width of the opening 45b of the housing recess 45 is set to be slightly wider than the diameter of the lead wire 19B. On the other hand, in the second modification, the width of the opening 45b of the housing recess 45 is set to be slightly narrower than the diameter of the lead wire 19B by forming the protrusion 45d. This is different from the embodiment and the first modification. Detailed descriptions of the same components as those in the embodiment and the first modification are omitted.

As shown in FIG. 8A, on the inner side and the outer side in the radial direction of the inner side surface 45 a of the housing recess 45, a protruding portion 45 d that protrudes toward the opposing inner side surface 45 a is formed.
The separation distance between the protrusions 45d facing each other in the circumferential direction, that is, the width of the opening 45b of the housing recess 45 is set to be slightly narrower than the diameter of the lead wire 19B. The pair of protrusions 45d on the outer diameter side of the housing recess 45 holds the lead wire 19B while slightly biting into the insulating coating 19b of the lead wire 19B.

In addition, due to the protrusion 45d, the gap between the protrusion 45d of the housing recess 45 and the insulating coating 19b of the lead wire 19B on the outer side in the radial direction is the same as that of the inner surface 45a of the housing recess 45 of the embodiment and the first modification. It is narrower than the gap between the lead wire 19B and the insulating coating 19b.
Further, the gap between the protrusion 45d of the housing recess 45 and the core wire 19a of the lead wire 19B on the inner side in the radial direction is the same as the inner surface 45a of the housing recess 45 and the core wire 19a of the lead wire 19B of the embodiment and the first modification. It is narrower than the gap.

According to the second modification of the embodiment, the width of the opening 45b of the housing recess 45 on the inner side and the outer side in the radial direction is set to be narrow, so that the ridges of the lead wire 19B and the housing recess 45 on the inner side and the outer side in the radial direction. The gap with the portion 45d can be narrowed. Accordingly, when the sealing member 47 is filled in the filling portion 50, leakage of the sealing member 47 from the inside and outside in the radial direction of the housing recess 45 can be suppressed.
Further, by setting the width of the opening 45b of the housing recess 45 to be narrower than the diameter of the insulating coating 19b, the insulating coating 19b of the lead wire 19B can be sandwiched and held in the housing recess 45. Thereby, it is possible to reliably prevent the lead wire 19 </ b> B from fluttering when the sealing member 47 is filled in the filling portion 50. Therefore, when the sealing member 47 is filled in the boundary portion 19d between the insulating coating 19b of the lead wire 19B and the core wire 19a, good workability can be ensured.

(Third modification of the embodiment, a retaining protrusion is formed in the housing recess)
Then, the accommodation recessed part 45 of the 3rd modification of embodiment is demonstrated.
FIG. 9 is an explanatory view of the housing recess 45 in the third modified example of the embodiment, FIG. 9 (a) is an explanatory view when viewed from the axial direction, and FIG. 9 (b) is an illustration of FIG. 9 (a). FIG.
In the embodiment and the first modification, the width of the opening 45b of the housing recess 45 is set to be slightly wider than the diameter of the lead wire 19B. In the second modification, the width of the opening 45b of the housing recess 45 is set to be slightly narrower than the diameter of the lead wire 19B due to the protrusion 45d. On the other hand, the third modification of the embodiment differs from the embodiment, the first modification, and the second modification in that a retaining protrusion 45e is formed on the opening 45b side of the housing recess 45. Yes. Detailed descriptions of the same components as those of the embodiment, the first modified example, and the second modified example are omitted.

As shown in FIG. 9A, on the inner side and the outer side in the radial direction of the inner side surface 45a of the housing recess 45, a ridge portion 45d is formed that projects toward the opposing inner side surface 45a. Further, four protrusion protrusions 45e project from the opening edge on the tip end portion 43a side of the protrusion 45d on the inner side and the outer side in the radial direction toward the opposed inner side surface 45a.
The separation distance between the opposing protrusions 45e is set to be narrower than the separation distance between the opposing protrusions 45d. Then, after the lead wire 19B is housed in the housing recess 45, the movement toward the opening 45b is restricted by a retaining protrusion 45e formed on the outer side in the radial direction.

According to the third modification of the embodiment, the retaining protrusion 45e is formed on the opening edge on the distal end portion 43a side of the housing recess 45, so that the lead wire 19B is disposed in the housing recess 45, and then the lead wire extends from the opening 45b. It is possible to prevent the boundary portion 19d of 19B from coming out. Therefore, when the sealing member 47 is filled in the filling portion 50, the lead wire 19B can be reliably prevented from fluttering and good workability can be ensured.
In addition, it is possible to prevent the boundary portion 19d of the lead wire 19B from coming out of the opening 45b without imposing a burden on the seal member 47 even when the vehicle is running after the vehicle is mounted. Therefore, the boundary portion 19d of the lead wire 19B can be surely sealed to prevent engine oil from leaking, and the stator 4 having high durability and reliability can be obtained.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  In the embodiment and each modification of the embodiment, a 12-pole 12-slot generator has been described as an example of the rotating electrical machine 1, but the number of poles and the number of slots of the rotating electrical machine 1 are not limited to this, and various Design changes are possible.

  In the embodiment and the first modification, the width of the accommodating recess 45 is set to be slightly larger than the diameter of the lead wire 19B, but is substantially the same as the diameter of the lead wire 19B or from the diameter of the lead wire 19B. May be set to be slightly narrower.

  In the first modified example, the inner diameter side surface 43 c protrudes toward the inner diameter side, and the thick wall portion 45 c is formed on the standing wall portion 43 around the accommodation recess 45. However, for example, the outer diameter side surface 43 b may protrude from the outer diameter side, and a thick wall portion may be formed on the standing wall portion 43 around the accommodation recess 45. Further, both the inner diameter side surface 43c and the outer diameter side surface 43b may be provided so as to form a thick portion 45c on the standing wall portion 43 around the accommodation recess 45.

  In the second modification, the thick portion 45c of the first modification is formed and the protrusion 45d is formed on the inner surface 45a of the housing recess 45. However, the housing recess 45 is not formed without forming the thick portion 45c. A protrusion 45d may be formed on the inner side surface 45a.

  In the third modification, the protrusion 45d of the second modification is formed, and four retaining protrusions 45e are formed from the opening edge on the tip 43a side of the protrusion 45d toward the opposing inner surface 45a. However, the retaining protrusion 45e may be formed from the opening edge on the tip 43a side of the housing recess 45 without forming the protrusion 45d. Further, the number of retaining protrusions 45e is not limited to four.

  In the embodiment and each modification of the embodiment, the housing recess 45 is formed in the standing wall 43 of the insulator 40, but the housing recess 45 may be formed in a portion other than the standing wall 43. Further, the housing recess 45 may be separately formed at the axial end portion of the stator core 17 without being integrally formed with the insulator 40.

  In the embodiment and each modification of the embodiment, the single-phase generator mounted in the engine block of the motorcycle has been described as an example of the outer rotor type rotating electrical machine 1. However, the application of the present invention is not limited to a single-phase generator, and can be widely applied to, for example, a three-phase starter generator, a stator of an inner rotor type rotating electrical machine, and the like.

  In the embodiment and each modified example of the embodiment, the housing recess 45 is formed on the bottom 46 formed on the stator core 17 side, the inner side surface 45a erected along the axial direction from the bottom 46, and the tip 43a side. The opening 45b was formed in a substantially U shape when viewed from the radial direction. However, the shape of the housing recess 45 is not limited to a substantially U shape when viewed from the radial direction, and may be a substantially V shape when viewed from the radial direction, for example.

DESCRIPTION OF SYMBOLS 1 Rotating electrical machine 3 Rotor 4 Stator 8 Magnet 16 Teeth 17 Stator core 17a Stator main body part 18 Armature coil 19 (19A, 19B) Lead wire 19a Core wire 19b Insulation coating 19c Terminal part 19d Boundary part 40 (40A, 40B) Insulator 43 Standing wall part 43a Front end portion 43b Outer diameter side surface 43c Inner diameter side surface 45 Housing recess 45a Inner side surface 45b Opening 45e Retaining protrusion 47 Seal member 50 Filling portion

Claims (7)

A stator core comprising a plurality of teeth extending from the stator main body along the radial direction of the stator main body,
An armature coil wound around the teeth;
A lead wire composed of a core wire and an insulating coating covering the core wire;
With
The terminal portion of the lead wire has the insulating wire removed and the core wire is exposed,
In the stator where the exposed core wire and the armature coil are connected, and the power generated by the armature coil is output to the outside,
An accommodation recess in which a boundary portion between the insulating coating and the core wire of the terminal portion is accommodated is provided at an axial end portion of the stator core,
A stator having a function as a filling portion for filling the housing recess with a sealing member for sealing the boundary portion. The stator according to claim 1,
An insulator for insulating the teeth and the armature coil is attached to the stator core,
A stator in which the housing recess is formed in the insulator. The stator according to claim 2,
The insulator is provided with an upright wall portion extending along the circumferential direction of the stator body portion on the axial end surface side of the stator body portion,
The stator is characterized in that the housing recess is formed at the tip of the standing wall so as to communicate the outer diameter side and the inner diameter side of the standing wall. The stator according to claim 3,
A stator having a thickness corresponding to the accommodating recess of the upright wall portion that is thicker than other portions. The stator according to claim 3 or 4,
On the inner side surface of the housing recess, protrusions are provided on the inner side and the outer side in the radial direction,
The stator, wherein a separation distance in the circumferential direction of the protrusion is set to be narrower than a diameter of the insulating coating. The stator according to any one of claims 3 to 5,
A stator having a retaining protrusion for preventing the lead wire from coming out of the housing recess on the inner edge of the housing recess on the opening edge on the tip side. The stator according to any one of claims 1 to 6,
A rotor having a plurality of magnets that are rotatably provided to the stator on the outer side in the radial direction of the stator, and that face the teeth in the radial direction;
A rotating electrical machine comprising:

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