WO2015045544A1

WO2015045544A1 - Hub dynamo

Info

Publication number: WO2015045544A1
Application number: PCT/JP2014/067788
Authority: WO
Inventors: 真力石; 拓人田邉
Original assignee: 株式会社ミツバ
Priority date: 2013-09-27
Filing date: 2014-07-03
Publication date: 2015-04-02
Also published as: JP2015067089A; CN105492308A; IN2015DN03260A; CN105492308B; JP6286170B2; DE112014004398T5; DE112014004398B4

Abstract

This hub dynamo (10) is provided with: a rotor having a body section at the inner peripheral surface of which a permanent magnet is formed; at least two stator units (20A, 20B) that are disposed at the inside of the body section and that are a first stator unit (20A) having a first coil (93a) wound in a cylindrical shape, and a second stator unit (20B) having a second coil wound in a cylindrical shape; and a vehicle wheel axle (11) that is provided in a manner so as to penetrate the inside in the radial direction of each coil (93a, 93b) and to the outside of which each stator unit (20A, 20B) is fitted and affixed. The first stator unit (20A) has a coupling section to which the second coil (93b) is routed.

Description

Hub dynamo

The present invention relates to a hub dynamo.
This application claims priority on Japanese Patent Application No. 2013-202491 filed in Japan on September 27, 2013, the contents of which are incorporated herein by reference.

In order to supply power to lighting devices such as bicycle headlights and taillights, generators that generate electricity by rotating wheels are widely used. Such generators have various structures, but a so-called hub dynamo that is attached to a wheel shaft is known.

The hub dynamo includes a stator unit (stator) fixed to the wheel shaft side, and a rotor configured to be rotatable around the wheel shaft.
The stator unit is wound around the coil chamber, a pair of main iron cores that are fitted on the outer peripheral side of the wheel shaft to form a coil chamber, a plurality of sub iron cores that are arranged between the pair of main iron cores and partition the coil chamber. And a coil (winding). The terminal portion of the coil is pulled out along the shaft and is electrically connected to a lighting device such as a headlight or a taillight.
On the other hand, the rotor is formed in a cylindrical shape so as to cover the periphery of the wheel shaft and the stator, and a permanent magnet is provided on the inner peripheral surface.

In such a configuration, when the wheel rotates, the rotor rotates together with the wheel, and the permanent magnet rotates around the stator unit. By rotating the permanent magnet, an alternating magnetic flux is generated in which the direction of the N pole and the S pole of the magnetic flux passing through the stator unit is repeatedly switched, and a current flows through the coil to generate power (see, for example, Patent Document 1). ).

JP 2011-152868 A

By the way, in addition to the hub dynamo configured as a single-phase alternator as in the above-described prior art, two stator units are fixed in parallel on the wheel shaft side and wound around the respective stator units. A hub dynamo configured as a two-phase AC generator that obtains current from a coil is conceivable. In this case, the coil ends wound around each stator unit are all drawn out in the same direction from the viewpoint of ensuring the design and the function of the hub dynamo, and are electrically connected to lighting devices such as headlamps and taillights. It is desirable to connect to.

However, of the two stator units, the coil that is drawn from one stator unit arranged on the opposite side of the coil drawing direction must be drawn beyond the other stator unit. The function may not be performed.

This invention provides a hub dynamo capable of pulling out all the coils wound around each stator unit in the same direction without impairing the design and function even when having a plurality of stator units.

(1) A hub dynamo according to a first aspect of the present invention is arranged with a rotor having a cylindrical portion that rotates with a wheel and has a magnetic pole formed on an inner peripheral surface thereof, and is disposed inside the cylindrical portion. At least two stator units, a first stator unit having a coil and a second stator unit having a second coil, are provided so as to penetrate the inner side in the radial direction of each coil, and each stator unit is externally fitted In a hub dynamo having a fixed wheel shaft, the first stator unit is a wiring portion in which either the second coil or a lead wire connected to the second coil is routed. Have

With this configuration, the second coil can be drawn out via the wiring portion on the side opposite to the second stator unit side of the first stator unit. For this reason, all the terminal portions of the coils wound around the respective stator units can be pulled out in the same direction without impairing the design and function of the hub dynamo.

(2) A second aspect of the present invention is the hub dynamo according to (1), wherein the first stator unit has a cylindrical body portion around which the first coil is wound. A cylindrical core disposed between the wheel shaft and the body portion, and a land ring provided so as to be magnetically connected to the core and opposed to the cylindrical portion in the radial direction. And the wiring portion is disposed on at least one of the inside of the body portion and the core.

With this configuration, the terminal portions of the coils wound around the respective stator units can be pulled out in the same direction without reducing the space factor of the coils wound around the body portion.

(3) A third aspect of the present invention is the hub dynamo according to (2), wherein a slit portion is formed in the core, and the slit portion functions as the wiring portion.

With this configuration, the wiring portion can be provided with a simple structure.

(4) A fourth aspect of the present invention is the hub dynamo according to (3), in which the slit portion is formed along the axial direction of the wheel shaft.

With this configuration, the coil routing path can be the shortest path.

(5) A fifth aspect of the present invention is the hub dynamo according to (3) or (4), wherein the bobbin is formed with a communication part that fits into the slit part, and the communication part and the slit part And function as the wiring part.

Structuring in this way can prevent the bobbin from rotating with respect to the wheel shaft and can easily position the bobbin.

(6) A sixth aspect of the present invention is the hub dynamo according to (5), wherein the communication portion communicates with an outer surface of the body portion.

With this configuration, the coil wound around the body portion can be easily routed around the communication portion.

(7) A seventh aspect of the present invention is the hub dynamo according to any one of (2) to (6), wherein the Randall unit is assembled from the first end side in the axial direction of the core. 1 and a second landle assembled from the second end side in the axial direction of the core, and the first landle is in contact with a first end in the axial direction of the core. A side plate portion, and a plurality of first teeth portions extending from the outer peripheral edge of the first side plate portion toward the second end side in the axial direction of the core and facing the cylindrical portion in the radial direction. The second ruddle extends from the outer peripheral edge of the second side plate portion in contact with the second end in the axial direction of the core to the first end side in the axial direction of the core. A plurality of first ends that are radially opposed to the cylindrical portion. And the first land and the second land are provided such that the first teeth and the second teeth are alternately arranged in the circumferential direction. And forming a first passage portion through which the second coil can be inserted into the first side plate portion and a second passage through which the second coil can be inserted into the second side plate portion. A passage portion is formed, and the first passage portion and the second passage portion are arranged so as to overlap in the axial direction.

With this configuration, the coil can be smoothly drawn out from each side plate portion, the coil can be prevented from being locally bent, and the coil can be routed smoothly.

(8) An eighth aspect of the present invention is the hub dynamo according to (7), in which the first number when the total number of the first teeth portion and the second teeth portion is SA. Is disposed at a position where the center in the circumferential direction is shifted 360 / (SA × 2) degrees from the center in the circumferential direction of the first teeth portion, and the second passage portion is The center in the circumferential direction is arranged at a position shifted 360 / (SA × 2) degrees from the center in the circumferential direction of the second tooth portion.

By configuring in this way, the first passage portion and the second passage portion can be formed in the same shape even when the first and second landles have the same shape. Can be overlaid. For this reason, the parts can be shared, the manufacturing cost of the hub dynamo can be reduced, and the assemblability of the hub dynamo can be improved.

(9) A ninth aspect of the present invention is the hub dynamo according to any one of (1) to (8), wherein a lead wire unit is disposed in the wiring portion, and the lead wire unit is It has a lead wire and an insulating covering portion that covers the lead wire, and one end of the lead wire is connected to the second coil.

With this configuration, it is not necessary to route the second coil in the first stator unit, and the assembly workability of the hub dynamo can be improved.

(10) A tenth aspect of the present invention is the hub dynamo according to any one of (1) to (9), wherein the second stator unit includes the wiring portion.

(11) An eleventh aspect of the present invention is the hub dynamo according to (7) or (8), wherein the first passage portion and the second passage portion are in a radial direction of the Randall unit. And a second slit portion that is bent and extended along the circumferential direction from the radially outer end of the first slit portion.

(12) A twelfth aspect of the present invention is the hub dynamo according to (11), wherein the bobbin side slit portion formed in the bobbin and extending in the radial direction and the second slit portion are in the axial direction. It is arranged so that it overlaps.

By comprising in this way, a 1st stator unit and a 2nd stator unit can be made into the same structure, and while being able to reduce a number of parts, parts management can be made easy.
Further, the second coil can be pulled out to the side opposite to the first stator unit.
Then, it is possible to connect the second coil drawn out to the side opposite to the first stator unit and the lead wire, simplify the routing of the second coil, and improve the assembly workability of the hub dynamo. Further improvement can be achieved.

According to the above-described hub dynamo, the second coil can be drawn out via the wiring portion on the side opposite to the second stator unit side of the first stator unit. For this reason, all the terminal portions of the coils wound around the respective stator units can be pulled out in the same direction without impairing the design and function of the hub dynamo.

It is a mounting schematic diagram of the hub dynamo in the first embodiment of the present invention. It is a side view of the hub dynamo in a 1st embodiment of the present invention. It is sectional drawing of the hub dynamo in 1st Embodiment of this invention. It is a perspective view of the stator in 1st Embodiment of this invention. It is a perspective view of the bobbin and stator core of the 1st stator unit in a 1st embodiment of the present invention. It is A arrow directional view of FIG. It is a perspective view of the 1st land in the 1st embodiment of the present invention. It is the top view which looked at the 1st randle in 1st Embodiment of this invention from the axial direction. It is a perspective view of the bobbin in the modification of 1st Embodiment of this invention. It is sectional drawing of the hub dynamo in 2nd Embodiment of this invention. It is a side view of the lead wire unit in a 2nd embodiment of the present invention.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic view of mounting of the hub dynamo 10. In the following description, a case where the hub dynamo 10 according to the present invention is attached to the wheel shaft 11 of the bicycle 1 and electric power is supplied to the headlamp 4 of the bicycle 1 will be described. The headlamp 4 can employ a filament light bulb or an LED lamp as a lamp. A circuit for rectifying and synthesizing the output of the hub dynamo 10 is incorporated in the lamp driving circuit.

(Hub dynamo mounting mode)
As shown in FIG. 1, a front wheel (wheel) 5 of the bicycle 1 is rotatably supported via a wheel shaft 11 by a front fork 3 constituting a part of the frame. Both sides of the wheel shaft 11 are fastened and fixed to the front fork 3 by a nut (not shown) or the like so as not to rotate. A hub dynamo 10 is attached coaxially to the wheel shaft 11 at most of the axial center of the wheel shaft 11. The hub dynamo 10 supplies electric power to the headlamp 4 disposed on the side of the front wheel 5.

The hub dynamo 10 is connected to the spoke 2 of the front wheel 5 and rotates around the wheel shaft 11 together with the front wheel 5, and is mounted on the wheel shaft 11 in a non-rotatable manner while being positioned on the inner peripheral side of the rotor 12. And a stator 13.

Hereinafter, the axial direction of the central axis O of the wheel shaft 11 is simply referred to as the axial direction, the direction orthogonal to the axial direction is referred to as the radial direction, and the direction along the central axis O is referred to as the circumferential direction. Note that a male screw portion 11a is formed in a portion of the wheel shaft 11 that is positioned at least on the axially outer side than the portion to which the stator 13 is attached.

(Rotor)
FIG. 2 is a side view of the hub dynamo 10, and FIG. 3 is a cross-sectional view of the hub dynamo 10.
As shown in FIGS. 2 and 3, the rotor 12 is mainly composed of a hub shell 100.
The hub shell 100 includes a cylindrical body portion (tubular portion) 61, and a first end plate 70 and a second end plate 80 that close both axial end openings of the body portion 61.

As shown in FIG. 3, the opening on the first end P side (the left side in FIG. 3) of the wheel shaft 11 of the body 61 is open at the time of manufacture, and is separated from the body 61 so as to close the opening. The second end plate 80 manufactured in the above is press-fitted and fixed to the end of the body 61 on the first end P side of the wheel shaft 11 after a predetermined assembly process.
The opening on the second end Q side (the right side in FIG. 3) of the wheel shaft 11 of the body portion 61 is closed from the time of manufacture by the first end plate 70 formed integrally with the body portion 61. The cylindrical body portion 61 and the first end plate 70 that closes the opening on the second end Q side of the wheel shaft 11 of the body portion 61 are manufactured as an integral part hub shell body 60. The hub shell main body 60 and the second end plate 80 that is separate from the hub shell main body 60 are manufactured by press-molding a magnetic metal plate (mainly an iron plate) having a certain thickness.

A pair of left and right flange portions 62 projecting outward in the radial direction is formed on the outer periphery of both end portions in the axial direction of the body portion 61 of the hub shell main body 60. Each flange portion 62 is formed by folding a metal plate, which is a raw material, into a U-shape at the time of press molding, and overlapping the axially inner flange plate 62a and the axially outer flange plate 62b in close contact with each other. Yes. A plurality of support holes 63 penetrating in the axial direction are formed in each flange portion 62 at equal intervals in the circumferential direction.
As shown in FIG. 1, the support holes 63 are engaged with inner ends of a plurality of spokes 2 extending from the rim 5 a of the front wheel 5 toward the inner diameter side. It should be noted that the support holes 63 of the left and right flange portions 62 are arranged so as to be out of phase by a half pitch.

The first end plate 70 that closes the opening on the second end Q side of the wheel shaft 11 of the body portion 61 has an annular side wall 71 that swells in a conical shape outward in the axial direction (on the second end Q side of the wheel shaft 11). A cylindrical bearing fitting wall 73 bent inward in the axial direction at the inner peripheral edge of the side wall 71 (on the first end P side of the wheel shaft 11), and inward in the axial direction of the bearing fitting wall 73 (the wheel shaft 11). The bearing retainer wall 74 is bent radially inward at the first end P side), and a flange portion 75 is provided continuously from the outer peripheral edge of the side wall 71 toward the radially outer side.
The flange portion 75 is continuous with the flange plate 62b on the outer side of the flange portion 62 on the second end Q side of the wheel shaft 11 of the body portion 61, so that the body portion 61, the first end plate 70, Are integrated. Thereby, the hub shell main body 60 as an integral part is configured.

The second end plate 80 that closes the opening on the first end P side of the wheel shaft 11 of the body portion 61 includes an annular side wall 81 and an inner side edge of the side wall 81 in the axial direction (the first end of the wheel shaft 11). A cylindrical bearing fitting wall 83 bent at the two ends Q side, and a bearing presser bent radially inward at the axially inner side (second end Q side of the wheel shaft 11) of the bearing fitting wall 83 The wall 84 and a cylindrical press-fitting fitting wall 85 that is bent inward in the axial direction (on the second end Q side of the wheel shaft 11) at the outer peripheral edge of the side wall 81.
The second end plate 80 is formed by press-fitting the cylindrical press-fitting fitting wall 85 into the inner periphery of the opening on the first end P side of the wheel shaft 11 of the trunk portion 61 of the hub shell body 60. It is fixed to the part 61.

The radially inner sides of the

bearing fitting walls

73 and 83 of the first end plate 70 and the second end plate 80 are opened as through

holes

72 and 82 that are positioned coaxially. Bearings (bearings) 21 and 22 are fitted to the inner peripheries of the defining

bearing fitting walls

73 and 83, respectively. The rotor 12 mainly composed of the hub shell 100 is rotatably supported on the wheel shaft 11 via the

bearings

21 and 22, and thus rotates about the wheel shaft 11 together with the rotation of the front wheel 5. That is, the rotor 12 functions as a hub that rotatably supports the front wheel 5.

A permanent magnet 19 formed of, for example, ferrite is disposed on the inner periphery of the body 61 of the hub shell main body 60. The radius of curvature of the outer peripheral surface of the permanent magnet 19 is set to be equal to the radius of the inner peripheral surface of the body 61, and the permanent magnet 19 is directly connected to the inner periphery of the body 61 made of a magnetic material without a yoke. It arrange | positions in the closely_contact | adhered state, for example, is stuck with the adhesive agent etc. The permanent magnet 19 covers the entire outer peripheral surface of the stator 13 by arranging the permanent magnet 19 in a cylindrical shape along the inner peripheral surface of the body portion 61. The permanent magnet 19 is incorporated in the inner periphery of the body 61 in a state of being divided into a plurality in the circumferential direction.

The N-pole and S-pole magnetic poles are alternately magnetized along the circumferential direction on the inner peripheral surface of the permanent magnet 19 arranged in a cylindrical shape. Specifically, the N poles and the S poles are each 10 poles, and a total of 20 poles are magnetized so that the N poles and the S poles are alternately arranged.

(Stator)
FIG. 4 is a perspective view of the stator 13.
As shown in FIGS. 3 and 4, the stator 13 is configured by combining a claw pole type first stator unit 20 </ b> A and a second stator unit 20 </ b> B in the axial direction of the wheel shaft 11. The stator unit 20A outputs an A-phase alternating current / voltage, and the second stator unit 20B outputs a B-phase alternating current / voltage.

Each

stator unit

20A, 20B is wound around the bobbin 92 in a ring shape, a cylindrical stator core (core) 91 that is externally fixed to the wheel shaft 11, a bobbin 92 that is externally fixed to the stator core 91, and the like. A coil 93, and a landle unit 94 formed so as to cover the periphery of the bobbin 92 from both axial ends of each bobbin 92. In addition, since the first stator unit 20A and the second stator unit 20B are configured substantially the same, in the following first embodiment, the first stator unit 20A will be mainly described and necessary. Accordingly, differences between the first stator unit 20A and the second stator unit 20B will be described.

FIG. 5 is a perspective view of the bobbin 92 and the stator core 91 of the first stator unit 20A, and FIG. 6 is a view taken in the direction of arrow A in FIG.
As shown in FIGS. 5 and 6, the stator core 91 is formed in a cylindrical shape by curving a magnetic plate material in a substantially C-shaped cross section. Thereby, the stator core 91 is formed with a slit portion (wiring portion) 91a along the axial direction.

The bobbin 92 is integrally formed with a cylindrical body portion 92a that is fitted and fixed to the stator core 91, and a pair of

outer flange portions

92b and 92c that are integrally formed at both axial ends of the body portion 92a. A coil 93 is annularly wound in a storage recess 95 formed by the outer peripheral surface of the body portion 92a and the inner surfaces of the pair of

outer flange portions

92b and 92c.
In addition, a communication portion (wiring portion) 96 is integrally formed along the axial direction at a location corresponding to the slit portion 91a of the stator core 91 on the inner peripheral surface of the body portion 92a. The communication part 96 is formed in a rectangular tube shape so as to be fitted into the slit part 91a, and two coils 93 can be inserted into the inside thereof.

Here, the positions of the slit portion 91 a of the stator core 91 and the communicating portion 96 of the bobbin 92 correspond to a later-described first slit portion 103 a formed in the Randall unit 94. Thereby, the coil 93 can be inserted into the communication part 96 (details will be described later).
Note that the communication portion 96 is not formed in the bobbin 92 of the second stator unit 20B.

Further, slit

portions

97a and 97b ((first) bobbin side slit portion 97a and (second) bobbin side slit portion 97b) are formed in the pair of

outer flange portions

92b and 92c, respectively, along the radial direction. . The

slit portions

97a and 97b are formed to draw out the coil 93 wound around the housing recess 95 toward the axially outer side of the bobbin 92, and are slightly in front of the body portion 92a from the outer peripheral edges of the

outer flange portions

92b and 92c. It is formed in between. In addition, the

slit portions

97 a and 97 b are formed at positions shifted from the communication portion 96 in the circumferential direction.

Further, three positioning

convex portions

98a and 98b each having a substantially semicircular cross section are formed on the outer surfaces of the pair of

outer flange portions

92b and 92c. Three positioning projections 98a formed on the outer flange portion 92b on the first end P side of the wheel shaft 11 and three positioning projections formed on the outer flange portion 92c on the second end Q side of the wheel shaft 11 The portions 98b are arranged at equal intervals in the circumferential direction. These

positioning projections

98a and 98b are formed for positioning the landle unit 94.

Here, the slits 97a and the positioning convex portions 98a formed on the outer flange portion 92b on the first end P side of the wheel shaft 11 and the outer flange portion 92c on the second end Q side of the wheel shaft 11 are formed. The positions of the slit portions 97b and the positioning convex portions 98b that are formed are not set at positions that overlap in the axial direction, but are shifted in the circumferential direction (details will be described later). This is because the two

landles

94a and 94b constituting the landle unit 94 are separately positioned. Hereinafter, the Landle unit 94 will be described in detail.

FIG. 7 is a perspective view of a first land 94a constituting the land 94, and FIG. 8 is a plan view of the first land 94a seen from the axial direction.
Here, the landle unit 94 includes a first landle 94a attached from the first end P side (see FIG. 3) of the wheel shaft 11 of the bobbin 92, and a second end Q side (FIG. 3) of the wheel shaft 11 of the bobbin 92. And a second landle 94b that is attached from (see). In addition, since the two

landles

94a and 94b have the same shape, in the following description, only the first landle 94a will be described, and the second landle 94b will be described as necessary.

As shown in FIGS. 7 and 8, the first land 94 a includes the outer flange portion 92 b on the first end P side (see FIG. 5) of the wheel shaft 11 of the bobbin 92 and the first end of the wheel shaft 11 of the stator core 91. A substantially disc-shaped side plate portion 101 that is in contact with the P side and a plurality of teeth portions 102 (102-1) that bend and extend along the axial direction from the outer peripheral edge of the side plate portion 101 are integrally formed. The length of the teeth portion 102 (102-1) in the axial direction is set to be substantially the same as the length of the bobbin 92 in the axial direction.

Here, the number A of the teeth portions 102 is set so that the number of magnetic poles of the permanent magnet 19 of the rotor 12 is P.
A = P / 2 (1)
It is set to satisfy. In the first embodiment, since the number P of magnetic poles is set to 20 poles, the number A of the tooth portions 102 is
A = P / 2 = 20/2 = 10 is set.

Further, the plurality of tooth portions 102 (102-1) are arranged at equal intervals in the circumferential direction, and are arranged so as to correspond to the permanent magnets 19 of the rotor 12 via gaps in the radial direction. In addition, the tooth portion 102 (102-1) has a size that allows the tooth portion 102 (102-2) of the second land 94b to be interposed between two teeth portions 102 (102-1) adjacent in the circumferential direction. Is formed.

A U-shaped groove 101 a is formed on the outer peripheral edge of the side plate portion 101 between the teeth portions 102 adjacent in the circumferential direction. Thus, local stress can be prevented from being applied to the connection portion between the side plate portion 101 and the tooth portion 102, and the tooth portion 102 (102 of the second landle 94b can be applied to the side plate portion 101 of the first land 94a. -2) can be prevented from coming into contact.
Further, an insertion hole 101b through which the wheel shaft 11 can be inserted is formed in the center of the side plate portion 101 in the radial direction. Furthermore, a plurality of (five in the first embodiment) slits 103 are formed in the side plate portion 101 at equal intervals in the circumferential direction around the insertion hole 101b.

As shown in detail in FIG. 8, the slit 103 has a role of suppressing an eddy current flowing through the first land 94 a, and a coil 93 through which the coil 93 drawn out from the bobbin 92 toward the axially outer side is inserted. It has a role as a passage part. The slit 103 is disposed between the U-shaped groove 101a and the insertion hole 101b, and extends in the circumferential direction from the radially outer end of the first slit portion 103a extending in the radial direction and the first slit portion 103a. The second slit portion 103b that bends and extends is formed in communication.
The formation position of the second slit portion 103 b is set on the radially inner side of the U-shaped groove 101 a of the side plate portion 101. That is, the formation position of the second slit portion 103 b is set at the center of the U-shaped groove 101 a in the circumferential direction of the side plate portion 101 and on the radially inner side of the side plate portion 101. Thus, the second slit portion 103b does not hinder the magnetic flux generated from the tooth portion 102 from being transmitted to the stator core 91 via the side plate portion 101.

The formation position of the 1st slit part 103a is demonstrated in detail.
That is, the total number of teeth 102 (102-1) of the first land 94a and the teeth 102 (102-2) of the second land 94b (hereinafter referred to as the total number of teeth 102) is SA. At this time, the deviation angle ΔD between the circumferential center P1 of the first slit portion 103a and the circumferential center P2 of the teeth portion 102 is:
ΔD = 360 / (SA × 2) (2)
It is set to satisfy.

In the first embodiment, since the total number SA of the tooth portions 102 is 20, the deviation angle ΔD between the circumferential center P1 of the first slit portion 103a and the circumferential center P2 of the teeth portion 102 is
ΔD = 360 / (SA × 2) = 360 / (20 × 2) = 9 degrees

Here, since the number of the teeth portions 102 of each of the

landles

94a and 94b is 10, the angle between the circumferential centers of two teeth portions 102 adjacent in the circumferential direction is 360/10 = 36 degrees. The angle between the center P3 between two teeth portions 102 adjacent to each other in the circumferential direction and the center P2 in the circumferential direction of the teeth portions 102 is 36/2 = 18 degrees.
That is, the center P1 in the circumferential direction of the first slit portion 103a is the center between the center P3 between the two teeth portions 102 adjacent in the circumferential direction and the center P2 in the circumferential direction of the teeth portion 102. .

In such a configuration, as shown in FIGS. 1 and 4, the first landle 94 a is attached from the first end P side of the wheel shaft 11 of the bobbin 92, and the second landle 94 b is attached to the bobbin 92. Is attached from the second end Q side of the wheel shaft 11. And the side plate part (1st of 1st Randle 94a is formed in the outer flange part 92b of the 1st end P side (refer FIG. 5) of the wheel shaft 11 of the bobbin 92 and the 1st end P side of the wheel shaft 11 of the stator core 91. The side plate portion 101 of the bobbin 92 is in contact with the outer flange portion 92c on the second end Q side (see FIG. 5) of the wheel shaft 11 of the bobbin 92 and the second end Q side of the wheel shaft 11 of the stator core 91 on the second end Q side. The side plate portion (second side plate portion) 101 of the rundle 94b comes into contact.

In addition, the teeth portions 102 (102-2) of the second land 94b are interposed between the teeth portions 102 (102-1) adjacent to each other in the circumferential direction of the first land 94a. That is, in the landle unit 94, the tooth portions 102 (102-1) of the first landles 94a and the teeth portions 102 (102-2) of the second landles 94b are alternately arranged in the circumferential direction.
In addition, each of the

landles

94a and 94b is positioned in the positioning

convex portions

98a and 98b formed on the

outer flange portions

92b and 92c of the bobbin 92, respectively, thereby preventing the circumferential displacement. The

Here, a circumferential shift (phase shift) between the first land 94a and the second land 94b is caused by the center P3 between the two teeth 102 adjacent in the circumferential direction and the circumferential of the teeth 102. Similar to the angle between the center P2, 36/2 = 18 degrees.
That is, as shown in FIG. 6, the position of the slit portion 97 a and the positioning convex portion 98 a formed in the outer flange portion 92 b on the first end P side of the wheel shaft 11, and the second end Q side of the wheel shaft 11. The deviation angle Δθ between the positions of the slit portion 97b and the positioning convex portion 98b formed in the outer flange portion 92c is set to 18 degrees.

Further, as shown in detail in FIG. 8, a deviation angle between the circumferential center P <b> 1 of the first slit portion 103 a of the slit 103 formed in each of the

landmarks

94 a and 94 b and the circumferential center P <b> 2 of the tooth portion 102. ΔD is set to satisfy Expression (2). For this reason, the 1st slit part 103a formed in the 1st randle 94a and the 1st slit part 103a formed in the 2nd randle 94b overlap in the axial direction.

Here, the formation position of the communication portion 96 formed on the bobbin 92 corresponds to the first slit portion 103a of each of the

landles

94a and 94b. For this reason, the communication part 96 and the 1st slit part 103a of each landle 94a, 94b communicate.
On the other hand, the formation positions of the

slit portions

97a and 97b formed on the bobbin 92 correspond to the U-shaped grooves 101a of the

corresponding landles

94a and 94b, respectively. More specifically, the formation position of the slit portion 97a is located at the center in the circumferential direction of the U-shaped groove 101a of the land 94a, and the formation position of the slit 97b is the circumferential direction of the U-shaped groove 101a of the Land 94b. Located in the center of For this reason, the second slit portion 103b overlaps the

slit portions

97a and 97b formed in the bobbin 92 in the axial direction. Thereby, the 2nd slit part 103b and each slit

part

97a, 97b communicate.

With this configuration, the first stator unit 20A and the second stator unit 20B are attached to the wheel shaft 11 side by side. A spacer 104 is provided between the first stator unit 20A and the second stator unit 20B. The spacer 104 is a ring shape that is externally fitted and fixed to the wheel shaft 11, and a slit 104 a is formed at a location corresponding to the communication portion 96 of the bobbin 92 and the first slit portion 103 a of each of the land marks 94 a and 94 b. ing. By forming the slit 104 a, it is possible to prevent the communication portion 96 of the bobbin 92 and the first slit portion 103 a of each of the

landmarks

94 a and 94 b from being blocked by the spacer 104.

Further, by providing the spacer 104, a gap K1 having a predetermined dimension is secured between the first stator unit 20A and the second stator unit 20B so as to separate the

stator units

20A and 20B in the axial direction. The gap K1 is used as a space for arranging the coil 93.
Furthermore, the first stator unit 20A and the second stator unit 20B are combined by shifting the positions of the tooth portions 102 of the

respective stator units

20A and 20B by a predetermined angle in the circumferential direction, that is, by shifting the phase. Yes. As a result, two-phase alternating currents and voltages of phase A and phase B, which are out of phase, are output from the coils 93 of the

stator units

20A and 20B.

As described above, the communication portion 96 is not formed on the bobbin 92 of the second stator unit 20B in order to dispose the first stator unit 20A and the second stator unit 20B out of phase. . Since the communication portion 96 is not formed, the communication portion 96 does not fit into the slit portion 91 a of the stator core 91. For this reason, the second stator unit 20B is rotatable in the circumferential direction, and can be fixed by rotating in the circumferential direction by a predetermined angle with respect to the first stator unit 20A. A method of fixing the first stator unit 20A and the second stator unit 20B will be described later.

(Coil drawing method)
Here, with reference to FIG. 3 to FIG. 5 and FIG. 7, a method of pulling out the coil 93 wound around the first stator unit 20A and the coil 93 wound around the second stator unit 20B will be described. .
First, a method of pulling out the coil 93 (first coil 93a) wound around the first stator unit 20A will be described.
The coil 93 (93a) is pulled out to the first end P side of the wheel shaft 11 through the slit portion 97a formed on the outer flange portion 92b of the bobbin 92 on the first end P side of the wheel shaft 11 of the bobbin 92. In this state, the bobbin 92 is wound around the storage recess 95. And the termination | terminus of the coil 93 (93a) is also pulled out to the 1st end P side of the wheel shaft 11 through the slit part 97a. Furthermore, the terminal part of the coil 93 (93a) pulled out from the slit part 97a is connected to the slit part 97a, and the second slit part 103b of the first land 94a is connected to the first end P side of the wheel shaft 11. Pull out.

Next, a method for pulling out the coil 93 (second coil 93b) wound around the second stator unit 20B will be described.
The coil 93 (93b) is also pulled out to the first end P side of the wheel shaft 11 through the slit portion 97a formed in the outer flange portion 92b of the bobbin 92 on the first end P side of the wheel shaft 11 of the bobbin 92. In this state, the bobbin 92 is wound around the storage recess 95. And the termination | terminus of the coil 93 (93b) is also pulled out to the 1st end P side of the wheel shaft 11 through the slit part 97a. Furthermore, the terminal part of the coil 93 (93b) pulled out from the slit part 97a is connected to the slit part 97a and the first slit P side of the wheel shaft 11 via the second slit part 103b of the first land 94a. Pull out.

A terminal portion of the coil 93 (93b) drawn from the first land 94a to the first end P side of the wheel shaft 11 is formed between the first stator unit 20A and the second stator unit 20B. Through the gap K1 and the slit 104a of the spacer 104, the first stator unit 20A is inserted into the communication portion 96 and the first slit portions 103a of the

respective landmarks

94a and 94b. And the terminal part of the coil 93 (93b) is pulled out to the first end P side of the wheel shaft 11 of the first stator unit 20A.
Thereby, the terminal part of the coil 93 (93a) in the 1st stator unit 20A and the terminal part of the coil 93 (93b) in the 2nd stator unit 20B are put together into the 1st end of the wheel shaft 11 of the stator 13. Pulled out to the P side.

(Regulation Department)
As shown in FIG. 3, a restricting portion 105 that restricts axial movement and circumferential rotation of the stator 13 is provided at portions of the wheel shaft 11 that are located on both axial sides of the stator 13. The restriction portion 105 includes a special nut 30 provided on the first end P side of the wheel shaft 11 of the stator 13 in the wheel shaft 11, and a stator fixing member 37 provided on the second end Q side of the wheel shaft 11. It is equipped with.
The first stator unit 20A and the second stator unit 20B constituting the stator 13 are provided between the special nut 30 and the stator fixing member 37, and the first stator unit 20A and the second stator unit 20B. The spacer 104 is clamped and fixed at a fixed position in the axial direction. And the rotation of the circumferential direction of the 1st stator unit 20A and the 2nd stator unit 20B is also controlled by the frictional resistance which arises by being pinched.

The special nut 30 includes a sleeve portion 30a formed on the first end P side of the wheel shaft 11, and a flange portion formed on the first end P side of the wheel shaft 11 and having an outer diameter enlarged relative to the sleeve portion 30a. 30b. Then, the internal thread portion 30 d formed on the inner periphery is screwed to the external thread portion 11 a of the wheel shaft 11, thereby being fixed to the outer periphery of the wheel shaft 11.

The outer peripheral surface of the sleeve portion 30b is fixed to the inner periphery of the inner ring of the bearing 22 in which the outer ring is fitted to the bearing fitting wall 83 of the second end plate 80 by press fitting or the like. The outer diameter of the flange portion 30 b is formed larger than the inner diameter of the bearing 22, and the end surface located on the first end P side of the wheel shaft 11 is in contact with the inner ring of the bearing 22 in the axial direction. Thereby, the bearing 22 is mounted on the outer ring side so as to be rotatable around the wheel shaft 11.

On the other hand, the end surface located on the second end Q side of the wheel shaft 11 in the flange portion 30b is in contact with the side plate portion 101 of the first land 94a constituting the first stator unit 20A in the axial direction.
Here, as shown in FIG. 4, on the outer peripheral surface of the special nut 30, the position corresponding to the slit 103 formed in the first land 94 a is located on the first end P side of the wheel shaft 11 of the stator 13. A groove 30c is formed for drawing the terminal portion of the drawn coil 93 to the outside of the hub dynamo 10.

As shown in FIG. 3, a connector 40 is disposed outside the second end plate 80, and a terminal portion of a coil 93 is introduced into the connector 40. The terminal portion of the coil 93 is guided to the lead wire lead-out portion 43 of the connector 40 through the groove 30c (see FIG. 4) of the special nut 30, and is drawn out of the hub dynamo 10 through the lead wire lead-out portion 43. ing. A sleeve portion 30 a of a special nut 30 is inserted through the inner peripheral portion of the connector 40, and the connector 40 is fixed to the wheel shaft 11 by a nut 46 via a washer 45.

A sleeve 50 is provided on the second end Q side of the wheel shaft 11 with respect to the stator fixing member 37 in the wheel shaft 11. The sleeve 50 is a cylindrical member having a female screw portion 50 c formed on the inner peripheral surface, and is screwed to the male screw portion 11 a of the wheel shaft 11 from the second end Q side of the wheel shaft 11. Specifically, the sleeve 50 is formed on the sleeve body 50a formed on the first end P side of the wheel shaft 11 and on the second end Q side of the wheel shaft 11 and has an outer diameter enlarged relative to the sleeve body 50a. Flange portion 50b.

The flange portion 50b is formed in a polygonal cylindrical shape, and the end surface on the first end P side of the wheel shaft 11 is in contact with the inner ring of the bearing 21 on the first end plate 70 side in the axial direction. The sleeve main body 50a is formed in a cylindrical shape, and is fitted into the inner periphery of the inner ring of the bearing 21 on the first end plate 70 side. Specifically, the sleeve main body 50 a has an outer diameter set to be equal to or slightly larger than the inner diameter of the bearing 21, and is fixed to the inner periphery of the inner ring of the bearing 21 by press fitting or the like.

A cover 54 is attached to the outside of the first end plate 70 so as to cover the bearing 21 and the sleeve 50. The cover 54 is a member formed in a bowl shape, that is, a truncated cone shape in which one side is open, and prevents water, dust, and the like from entering the rotor 12 from the outside. A nut 52 screwed to the wheel shaft 11 is arranged on the inner peripheral portion of the cover 54 to prevent the sleeve 50 from loosening.

(Power generation mechanism)
The power generation of the hub dynamo 10 configured as described above is performed in the following manner.
That is, when the front wheel 5 rotates, the rotor 12 connected to the front wheel 5 by the spoke 2 rotates around the wheel shaft 11 together with the front wheel 5, and the permanent magnet 19 rotates around the stator 13.

The teeth 102 (102-1) of the first land 94a provided on the first end P side of the wheel shaft 11 of each of the

stator units

20A and 20B is made S pole and the wheel shaft 11 by the magnetic flux of the rotating permanent magnet 19. Of the second land 94b provided on the second end Q side of the teeth portion 102 (102-2) of the N pole, and the teeth portion 102 (102-1) of the first land 94a is of the N pole, The state where the teeth portion 102 (102-2) of the second land 94b provided on the second end Q side of the wheel shaft 11 is the S pole is alternately repeated.

Thereby, an alternating magnetic flux is generated in the stator core 91 of the A-phase first stator unit 20A and the stator core 91 of the B-phase second stator unit 20B, and this alternating magnetic flux causes the first and second stator units 20A, A current flows through each coil 93 (93a, 93b) of 20B to generate power.
At this time, the alternating current / voltage output from the coil 93 (93a) of the first stator unit 20A and the alternating current / voltage output from the coil 93 (93b) of the second stator unit 20B are in phase. There is no point where the alternating voltage drops to 0V.

(effect)
In the first embodiment described above, the communication portion 96 is provided in the bobbin 92 of the first stator unit 20A, and the coil 93 wound around the second stator unit 20B is connected to the first stator unit 20B via the communication portion 96. It is pulled out to the first end P side of the wheel shaft 11 of the unit 20A. For this reason, for example, there is no need to route the coil 93 around the outer periphery of the hub dynamo 10. Therefore, the terminal part of the coil 93 wound around the two

stator units

20A and 20B can be pulled out from the first end P side of the wheel shaft 11 without impairing the design and function of the hub dynamo 10. it can.

The communication portion 96 is integrally formed on the inner peripheral surface side of the body portion 92 a of the bobbin 92, and a slit portion 91 a into which the communication portion 96 is fitted is formed in the stator core 91. For this reason, the coil 93 wound around the second stator unit 20B is not routed on the bobbin 92 of the first stator unit 20A. Therefore, the terminal portion of the coil 93 wound around the two

stator units

20A and 20B can be pulled out from the first end P side of the wheel shaft 11 together with a simple structure, and the first stator unit. It is possible to prevent the space factor of the coil 93 wound around the 20A bobbin 92 from being lowered.
Furthermore, by fitting the communication portion 96 into the slit portion 91a, it is possible to prevent the bobbin 92 from rotating with respect to the wheel shaft 11, and the bobbin 92 can be easily positioned.

And since the slit part 91a and the communication part 96 of the stator core 91 are formed along the axial direction of the wheel shaft 11, the routing path | route of the coil 93 can be made into the shortest path | route.
Further, by forming slits (first passage portion, second passage portion) 103 in the side plate portion 101 of each of the

landles

94a and 94b constituting the landle unit 94, the coil 93 can be smoothly moved from each side plate portion 101. It can be pulled out. For this reason, it can prevent that the coil 93 bends locally and can coil a coil smoothly.

Further, the slit 103 is constituted by the first slit portion 103a and the second slit portion 103b, and a deviation angle ΔD between the circumferential center P1 of the first slit portion 103a and the circumferential center P2 of the teeth portion 102. Is set so as to satisfy the equation (2). For this reason, even if the first and

second randles

94a and 94b have the same shape, when the two

randles

94a and 94b are assembled, the first slit portions 103a of the

randles

94a and 94b are overlapped in the axial direction. Can do. Therefore, the parts can be shared, the manufacturing cost of the hub dynamo 10 can be reduced, and the assemblability of the hub dynamo 10 can be improved.
In addition, by forming the slit 103, it is possible to suppress the generation of eddy currents in the side plate portions 101 of the

respective landles

94a and 94b when the hub dynamo 10 generates power.

In the first embodiment described above, in the bobbin 92, the position of the slit portion 97a and the positioning convex portion 98a formed in the outer flange portion 92b on the first end P side of the wheel shaft 11 and the The position of the slit part 97b and the positioning convex part 98b formed in the outer flange part 92c on the two ends Q side is not set at the overlapping position in the axial direction, but is described as being shifted in the circumferential direction. did. Moreover, the case where each slit

part

97a, 97b was formed in the position shifted | deviated from the communicating part 96 in the circumferential direction was demonstrated.

However, the embodiment of the present invention is not limited to this. For example, as shown in the perspective view of the bobbin 92 in the modification of the first embodiment shown in FIG. 9, the outer flange on the first end P side of the wheel shaft 11 is used. The slit portion 97a formed in the portion 92b and the slit portion 97b formed in the outer flange portion 92c on the second end Q side of the wheel shaft 11 are formed so as to overlap in the axial direction. You may form so that 97a, 97b and the communication part 96 may communicate.
Even in this case, the positioning convex portion 98a formed on the outer flange portion 92b on the first end P side of the wheel shaft 11 and the outer flange portion 92c on the second end Q side of the wheel shaft 11 are formed. It is necessary to set the position of the positioning convex portion 98b that is set in accordance with the phase of the corresponding

landmarks

94a and 94b.

Second Embodiment (Hub Dynamo)
Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, about the same aspect as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.
FIG. 10 is a cross-sectional view of the hub dynamo 210 in the second embodiment.
As shown in the figure, the difference between the first embodiment and the second embodiment described above is that a communication portion 96 is formed on the bobbin 92 of the first stator unit 20A in the first embodiment. The communication portion 96 is not formed on the bobbin 292 of the first stator unit 220A in the second embodiment. A lead wire unit 206 that passes through the two slit portions 91a is routed in the slit portion 91a of the stator core 91 of the first stator unit 20A and the slit portion 91a of the stator core 91 of the second stator unit 20B. ing.

(Lead wire unit)
FIG. 11 is a side view of the lead wire unit 206.
As shown in the figure, the lead wire unit 206 includes two lead wires 207 and a resin mold portion (covering portion) 208 that is resin-molded so as to cover these lead wires 207.
The cross-sectional area of the resin mold portion 208 is set to a size that can be routed in the slit portion 91a of the stator core 91 in each

stator unit

20A, 20B. Further, the length of the resin mold portion 208 is set such that both ends slightly protrude from the

stator units

20A and 20B in a state where the

stator units

20A and 20B are attached to the wheel shaft 11.
The end portions of the two lead wires 207 protrude from both ends of the resin mold portion 208, respectively.

In such a configuration, as shown in FIG. 10, the start end and the end of the coil 93 (93b) wound around the second stator unit 20B are respectively the second end Q of the wheel shaft 11 of the bobbin 92. It is pulled out to the second end Q side of the wheel shaft 11 through a slit portion 97a formed in the outer flange portion 92b on the side (right side in FIG. 10). The start and end of the coil 93 (93b) are connected to one end of the two lead wires 207 of the lead wire unit 206 by soldering.
On the other hand, the other end of the two lead wires 207 of the lead wire unit 206 is connected to the first end P side of the wheel shaft 11 (left side in FIG. 10) together with the coil 93 (93a) wound around the first stator unit 20A. ).

Therefore, according to the second embodiment described above, the coil 93 (93b) wound around the second stator unit 20B is replaced with the communication portion of the first stator unit 20A as in the first embodiment described above. 96 and the first slit portion 103a of each of the

landles

94a and 94b need not be inserted. For this reason, the assembly workability of the hub dynamo 210 can be improved.
Further, the first stator unit 20A and the second stator unit 20B can have the same structure, so that the number of parts can be reduced and parts management can be facilitated.

Furthermore, the starting end and the terminal end of the coil 93 (93b) wound around the second stator unit 20B can be pulled out to the second end Q side of the wheel shaft 11 on the opposite side to the first stator unit 20A. . The coil 93 (93b) wound around the second stator unit 20B is simply connected to one end of the two lead wires 207 of the lead wire unit 206 at the start and end of the drawn coil 93 (93b). ) Can be made to be the same as those drawn to the first end P side of the wheel shaft 11. For this reason, it is possible to simplify the start and end of the coil 93 (93b) wound around the second stator unit 20B, and to further improve the assembly workability of the hub dynamo.

In the second embodiment, the case where the start end and the end of the coil 93 (93b) are connected to one end of the two lead wires 207 of the lead wire unit 206 by soldering has been described. However, the embodiment of the present invention is not limited to this, and it is only necessary that the coil 93 (93b) and the lead wire 207 are connected. For example, it is possible to connect using a crimp terminal or the like.

In the second embodiment described above, the lead wire unit 206 is configured by two lead wires 207 and a resin mold portion 208 that is resin-molded so as to cover these lead wires 207. explained. However, the embodiment of the present invention is not limited to this, and the lead wire unit 206 only needs to cover the two lead wires 207 with an insulating member. For example, instead of the resin mold portion 208, the two lead wires 207 may be covered with a resin tube.

Furthermore, the present invention is not limited to the above-described embodiment, and various modifications may be made to the above-described embodiment without departing from the spirit of the present invention.
For example, in the above-described embodiment, the first stator unit 20A and the second stator unit 20B that constitute the stator 13 are the special nut 30, the stator fixing member 37, the first stator unit 20A, and the second stator unit. A case has been described in which the spacer 104 is provided between 20B and 20B and is held and fixed at a fixed position in the axial direction. And the case where rotation of the circumferential direction of the 1st stator unit 20A and the 2nd stator unit 20B was controlled by the frictional resistance which arises by being pinched was explained. However, the embodiment of the present invention is not limited to this, and the first stator unit 20A and the second stator unit 20B are separately provided in the circumferential direction so that the phases in the circumferential direction are combined with each other with a predetermined angular shift. Positioning means may be provided.

In the above-described embodiment, the case where the communication portion 96 is not integrally formed on the bobbin 92 of the second stator unit 20B has been described. However, the embodiment of the present invention is not limited to this, and the communication portion 96 may be provided on the bobbin 92 of the second stator unit 20B. In this case, the position of the communication portion 96 formed on the bobbin 92 of the second stator unit 20B is set so that the circumferential phase of the second stator unit 20B is shifted by a predetermined angle with respect to the first stator unit 20A. Is desirable.

Furthermore, in the above-described embodiment, the case where the stator 13 is configured by the two

stator units

20A and 20B has been described. However, the embodiment of the present invention is not limited to this, and the stator 13 may be configured by three or more stator units. In this case, the communication portion 96 may be formed on the bobbin 92 of the desired stator unit based on the direction in which the coil 93 wound around each stator unit is pulled out.
And in the above-mentioned embodiment, the case where the five slits 103 were formed in the circumferential direction at equal intervals around the penetration hole 101b in the side plate part 101 of each of the

land

94a, 94b was explained. However, the number of slits 103 is not limited to five.

According to the hub dynamo of the present invention, the second coil can be pulled out via the wiring portion on the side opposite to the second stator unit side of the first stator unit. For this reason, all the terminal portions of the coils wound around the respective stator units can be pulled out in the same direction without impairing the design and function of the hub dynamo.

5 Front wheels
10 hub dynamo 11 wheel shaft 12 rotor 19 permanent magnet (magnetic pole)
20A 1st stator unit 20B 2nd stator unit 61 A trunk part (cylinder part)
91 Stator core (core)
91a Slit part (wiring part)
92 Bobbin 92a Body part 93 Coil 93a Coil (first coil)
93b Coil (second coil)
94 Landle unit 94a First landle 94b Second landle 96 Communication part (wiring part)
97a Slit ((first) bobbin side slit)
97b Slit part ((second) bobbin side slit part)
101 side plate portion (first side plate portion, second side plate portion)
102 Teeth portion 102-1 First teeth portion 102-2 Second teeth portion 103 Slit (first passage portion, second passage portion)
103a 1st slit part 103b 2nd slit part 206 Lead wire unit 207 Lead wire 208 Resin mold part (covering part)

Claims

A rotor that rotates with the wheel and has a cylindrical portion in which a magnetic pole is formed on the inner peripheral surface;
At least two stator units, which are disposed inside the cylindrical portion and have a first stator unit having a first coil and a second stator unit having a second coil;
In a hub dynamo provided with a wheel shaft that is provided so as to penetrate the radial inner side of each coil, and each stator unit is fitted and fixed,
The hub stator dynamo characterized in that the first stator unit has a wiring portion in which any one of the second coil and a lead wire connected to the second coil is routed.
The first stator unit includes:
A bobbin having a cylindrical body part around which the first coil is wound;
A cylindrical core disposed between the wheel axle and the body portion;
A Randle unit provided to be magnetically connected to the core and to face the cylindrical portion in the radial direction,
2. The hub dynamo according to claim 1, wherein the wiring portion is disposed at least one of the inside of the body portion and the core.
The hub dynamo according to claim 2, wherein a slit portion is formed in the core, and the slit portion functions as the wiring portion.
The hub dynamo according to claim 3, wherein the slit portion is formed along an axial direction of the wheel shaft.
The hub dynamo according to claim 3 or 4, wherein a communication portion that fits into the slit portion is formed in the bobbin, and the communication portion and the slit portion cooperate to function as the wiring portion.
The hub dynamo according to claim 5, wherein the communication part communicates with an outer surface of the body part.
The Randle unit is
A first landle assembled from the first end side in the axial direction of the core;
A second Randall assembled from the second end side in the axial direction of the core,
The first Randall is
A first side plate that contacts a first end of the core in the axial direction;
A plurality of first teeth portions extending from the outer peripheral edge of the first side plate portion toward the second end side in the axial direction of the core and facing the cylindrical portion in the radial direction;
The second Randall is
A second side plate contacting the second end in the axial direction of the core;
A plurality of second teeth portions extending from the outer peripheral edge of the second side plate portion toward the first end side in the axial direction of the core and facing the cylindrical portion in the radial direction;
The first land and the second land are provided so that the first teeth and the second teeth are alternately arranged in the circumferential direction,
A first passage portion through which the second coil can be inserted is formed in the first side plate portion, and a second passage portion through which the second coil can be inserted into the second side plate portion. Forming,
The hub dynamo according to any one of claims 2 to 6, wherein the first passage portion and the second passage portion are disposed so as to overlap in the axial direction.
When the total number of the first tooth portion and the second tooth portion is SA,
The first passage portion is disposed at a position where the center in the circumferential direction is shifted by 360 / (SA × 2) degrees from the center in the circumferential direction of the first teeth portion,
The hub according to claim 7, wherein the second passage portion is arranged at a position where the center in the circumferential direction is shifted from the center in the circumferential direction of the second teeth portion by 360 / (SA × 2) degrees. Dynamo.
A lead wire unit is arranged in the wiring part,
The lead wire unit has the lead wire and an insulating covering portion that covers the lead wire,
The hub dynamo according to any one of claims 1 to 8, wherein one end of the lead wire is connected to the second coil.
The hub dynamo according to any one of claims 1 to 9, wherein the second stator unit includes the wiring portion.
The first passage portion and the second passage portion are bent and extended along a circumferential direction from a radially outer end of the first slit portion and a first slit portion extending along a radial direction of the Randall unit. The hub dynamo according to claim 7 or 8, wherein the second slit portion is formed so as to communicate with the second slit portion.
The hub dynamo according to claim 11, wherein the bobbin side slit portion formed in the bobbin and extending in the radial direction and the second slit portion are arranged so as to overlap in the axial direction.