DE112014004398B4 - Hub dynamo - Google Patents

Abstract

A hub dynamo (10) comprising: a rotor (12) rotating together with a wheel and having a tube portion (61) having magnetic poles (19) formed on an inner peripheral surface thereof; at least two stator units (20A, 20B) which are arranged within the tube section and comprise a first stator unit (20A) with a first coil (93a) and a second stator unit (20B) with a second coil (93b); anda wheel axle (11) which is provided to pass through radially inner sides of the coils (93a, 93b) and to which the stator units (20A, 20B) are externally adapted and fixed, the first stator unit (20A) having a wiring section ( 96) in which one or one of the second coil (93b) and a lead wire (207) connected to the second coil runs, the first stator unit comprising: a coil former (92) with a tubular body portion (92a) around which the first coil (93a) is wound; a tubular core (91) disposed between the wheel axle (11) and the fuselage portion (92a); and a claw unit (94) which is provided to be magnetically connected to the core (91) and to face the pipe section (61) in a radial direction, and wherein the wiring section (96) in at least one of the interior of the fuselage section (92a) and the core (91) is arranged.

Description

In order to supply lighting systems, such as a front light or a rear light of a bicycle, with electrical energy or electrical current, generators which generate electrical energy or electrical current by rotating a wheel are widely used. Although generators with different types of structures exist as such generators, so-called hub dynamos are known which are attached to a wheel axle.

The hub dynamos include a stator unit (stator) attached to a wheel axle side and a rotor configured to be rotatable about the wheel axle.

The stator unit is constituted by a pair of main iron cores which are externally fitted to an outer circumferential side of the wheel axle and form a coil chamber, a plurality of auxiliary iron cores which are arranged between the pair of main iron cores and which separate the coil chamber, and a coil (wound or wound wire), which is wrapped around the bobbin. A connector portion of the coil is pulled out along the axis and electrically connected to lighting systems such as a front light or a rear light.

In addition, the rotor is shaped in a tubular shape to cover the periphery of the wheel axle and the periphery of the stator, and has a permanent magnet provided on an inner peripheral surface thereof.

When the wheel rotates based on such a configuration, the rotor rotates integrally with this wheel and the permanent magnet rotates around the stator unit. By rotating the permanent magnet, an alternating magnetic flux is generated in which changing the orientation of a north pole (N pole) and a south pole (S pole) of a magnetic flux that penetrates through the stator unit is repeated and an electric current flows into the coil and power generation is carried out (reference for example to JP 2011-152868 A ).

Furthermore, in DE 198 15 977 A1 discloses a generator assembly for a vehicle having a coil bearing that is fixedly disposed around a hub of a wheel of the vehicle. The coil bearing contains a coil wound around it and a circuit board attached to it. An outer housing is rotatably disposed around the spool bearing and is fixed to the wheel so that it rotates with it. A permanent magnetic device is fixedly arranged on an inner circumference of the outer housing and can be rotated relative to the coil bearing in order to induce an electric current when the wheel rotates. One end of an electrical wire is electrically connected to the coil bearing.

Out DE 197 12 818 A1 is a hub dynamo for powering not only bicycle lights, but also auxiliary devices that are different from the lights, without increasing a pedal load and without reducing the current supplied to the lights. A first and a second stator are attached independently and side by side on the right and left side on the axis of the dynamo. Supply lines from the stator coils of the stators are connected to a headlight or to auxiliary devices that are different from the headlight.

JP H01-45259Y2 discloses another coil device according to the prior art.

Incidentally, in addition to the hub dynamos, which are designed as single-phase AC generators as in the prior art described above, there is a hub dynamo, which is designed as a two-phase AC generator, in which two stator units are fixed or fastened parallel to the wheel axle side, and electrical currents from coils obtained around the corresponding stator units can be obtained. In this case, it is desirable to pull out all the connection sections of the coils wound around the corresponding stator units in the same direction and to electrically connect the connection sections to lighting systems, such as a front light or a rear light, in the sense of a design capability, ensuring the functionality or the like Hub dynamos.

However, the coil (end of the coil) which is pulled out by one stator unit of the two stator units and which is arranged on a side opposite the pull-out direction of the coil, should be pulled out beyond the other coil and thus a design or functions of the hub dynamo may not be possible or be realized.

The object of the invention is to provide a hub dynamo which can pull out all coils wound around corresponding stator units in the same direction without impairing a formability or functions even in a case in which a large number of stator units are provided.

The object is solved by the features of claim 1. Advantageous refinements are the subject of the dependent claims.

(1) A hub dynamo relating to a first aspect of the invention includes a rotor that rotates together with a wheel and has a tube section that has magnetic poles formed on an inner peripheral surface thereof; at least two stator units, which are arranged within the tube section and comprise a first stator unit with a first coil and a second stator unit with a second coil; and a wheel axle that is provided to pass through radially inner sides of the respective coils and to which the corresponding stator units are externally adapted and fixed. The first stator unit has a wiring section in which both the second coil and a lead wire, which is connected to the second coil, run or are guided.

Because the invention is designed in this way, the second coil (end of the second coil) can be pulled out via the wiring section to a side of the first stator unit opposite the second stator unit side. For this reason, all of the connection portions of the coils that are wound around the corresponding stator units can be pulled out in the same direction without affecting the formability or functions of the hub dynamo.

Another aspect of the invention is the hub dynamo described in (1), in which the first stator unit has a bobbin that has a tubular body portion around which the first coil is wound; a tubular core disposed between the wheel axle and the fuselage section; and a claw unit provided so as to be magnetically connected to the core and to face the pipe section in a radial direction, and the wiring sections are arranged in at least one of the inside of the trunk section and the core.

By arranging the invention in this way, all of the terminal portions of the coils wound around the corresponding stator units can be pulled out in the same direction without reducing the space factor of the coil wound around the body portion.

(2) A second aspect of the invention is the hub dynamo described in (1), in which the core is formed with a slot portion, and the slot portion is configured to act as a wiring portion.

By configuring the invention in this way, the wiring section can be provided with a simple structure.

(3) A third aspect of the invention is the hub dynamo described in (2), in which the slit portion is formed along an axial direction of the wheel axis.

By arranging the invention in this way, the conduction path of the coil can be the shortest path.

(4) A fourth aspect of the invention is the hub dynamo described in (2) or (3), in which the spool is formed with a communication section that fits in the slot section and the communication section functions as the wiring section in cooperation with the slot section.

By arranging the invention in this way, the bobbin can be prevented from rotating with respect to the wheel axis, and the bobbin can be easily positioned.

(5) A fifth aspect of the invention is the hub dynamo described in (4), in which the communication section communicates with an outer surface of the fuselage section.

By arranging the invention in this way, the coil wound around the fuselage section can be easily guided around the communication section.

(6) A sixth aspect of the invention is the hub dynamo described in (1) to (5), in which the claw unit is composed of a first claw mounted from a first end side in an axial direction of the core and a second claw that is mounted from a second end side in the axial direction of the core. The first claw includes a first side plate portion that comes into contact with a first end in the axial direction of the core; and a plurality of first tooth portions that extend toward a second end side in the axial direction of the core from an outer peripheral edge of the first side plate portion and face the tube portion in the radial direction. The second claw includes a second side plate portion that comes into contact with a second end in the axial direction of the core, and a plurality of second tooth portions that extend toward the first end side in the axial direction of the core from an outer peripheral edge of the second side plate portion , and face the pipe section in the radial direction. The first claw and the second claw are provided that a first tooth section and a second tooth section are arranged alternately in a circumferential direction. The first side plate portion is formed with a first passage portion that allows the second coil to be inserted therethrough, the second side plate portion is formed with a second passage portion that allows the second coil to be inserted therethrough, and the first passage portion and the second passage portions are arranged to overlap each other in the axial direction.

By arranging the invention in this manner, the spool (the end of the spool) can be easily pulled out from each side plate portion, the spool can be prevented from being bent locally, and the spool can be easily wired.

(7) A seventh aspect of the invention is the hub dynamo described in (6), in which when the total number of the first tooth portions and the second tooth portions is SA, a circumferential center of the first passage portion is located at a position from a circumferential center of a first Tooth portion is shifted by 360 / (SA × 2) degrees, and a circumferential center of the second passage portion is arranged at a position that is shifted from the circumferential center of a second tooth portion by 360 / (SA × 2) degrees.

By arranging the invention in this way, even if the first claw and the second claw are made in the same shape, the first passage portion and the second passage portion can be overlapped with each other in the axial direction when the two claws are assembled as a claw unit. For this reason, parts or components can be shared or reused, the manufacturing cost of the hub dynamo can be reduced, and the mounting of the hub dynamo can be improved.

(8) An eighth aspect of the invention is the hub dynamo described in one of (1) to (7), in which a lead wire unit is disposed in the wiring section, the lead wire unit having a lead wire and a cover portion with insulation covering the lead wire and one end of the lead wire is connected to the second coil.

By arranging the invention in this way, it is unnecessary to wire or conduct the second coil in the first stator unit, and the mounting ability of the hub dynamo can be improved.

(9) A ninth aspect of the invention is the hub dynamo described in (1) to (8) in which the second stator unit has the wiring portion.

(10) A tenth aspect of the invention is the hub dynamo described in (6) or (7), in which the first passage portion and the second passage portion are formed such that a first slot portion extending along the radial direction of the claw unit, and a second slit portion, which is bent and extends along the circumferential direction from a radially outer end of the first slit portion, communicate with each other.

(11) An eleventh aspect of the invention is the hub dynamo described in (10), in which a bobbin side slot portion formed in the bobbin and extending in the radial direction and the second slot portion are arranged so as to be mutually in the axial direction to overlap.

By arranging the invention in this way, the first stator unit and the second stator unit can be manufactured with the same structure, the number of parts can be reduced, and management of the parts can be made easy.

In addition, the second coil (the end of the second coil) can be pulled out to a side opposite to the first stator unit.

Also, the second coil which has been pulled out to the side opposite to the first stator unit and the lead wire can be connected to each other, guiding the second coil can be simplified and the assembling ability of the hub dynamo can be further improved.

According to the hub dynamo described above, the second coil (end of the second coil) can be pulled out through the wiring portion to the side opposite to the second stator unit side of the first stator unit. For this reason, all connection sections of the coils, which are wound around the corresponding stator units, can be pulled out in the same direction without impairing the formability or functions of the hub dynamo.

Figure list

• 1 Figure 12 is a schematic diagram of hub dynamo attachment in a first embodiment of the invention.
• 2nd is a side view of the hub dynamo in the first embodiment of the invention.
• 3rd 10 is a cross-sectional view of the hub dynamo in the first embodiment of the invention.
• 4th Fig. 10 is a perspective view of a stator in the first embodiment of the invention.
• 5 10 is a perspective view of a coil bobbin and a stator core of a first stator unit in the first embodiment of the invention.
• 6 is a view as seen from arrow A of the 5 is seen.
• 7 10 is a perspective view of a first claw in the first embodiment of the invention.
• 8th 10 is a plan view when the first claw is seen from an axial direction in the first embodiment of the invention.
• 9 10 is a perspective view of a bobbin in a modified example of the first embodiment of the invention.
• 10th is a cross-sectional view of a hub dynamo in a second embodiment of the invention.
• 11 Fig. 12 is a side view of a lead wire unit in the second embodiment of the invention.

DESCRIPTION OF THE EMBODIMENTS

A first embodiment of the invention is described with reference to 1 to 9 described.

1 Figure 4 is a schematic diagram of hub dynamo attachment 10th . In addition, in the following description, there will be a case where the hub dynamo related to the invention 10th to a wheel axle 11 of a bike 1 is attached and the front light 4th of the bike 1 an electrical current or electrical power is supplied. A light bulb or an LED lamp can be used as a lamp for the front light 4th be used. A circuit that outputs the hub dynamo 10th rectified and built is mounted in a driver circuit of the lamp.

(Attachment point of view of the hub dynamo)

As in 1 a front wheel (wheel) is shown 5 of the bike 1 rotatable about the wheel axle 11 through a front fork 3rd stored, which forms a portion of a frame. Both sides of the wheel axle 11 are not rotatably attached and by nuts (not illustrated) or the like on the front fork 3rd fixed or fixed. The hub dynamo 10th is at most of the center of the wheel axle 11 in an axial direction coaxial with the wheel axis 11 appropriate. The hub dynamo 10th supplies this on one side of the front wheel 5 arranged front light 4th with electrical power or electrical current.

The hub dynamo 10th is with a rotor 12 with a spoke 2nd of the front wheel 5 connected and together with the front wheel 5 around the axis 11 turns, and a stator 13 equipped in a state in which the stator on an inner peripheral side of the rotor 12 is located, not rotatable on the wheel axle 11 is appropriate.

The following is an axial direction of a central axis O the wheel axle 11 simply referred to as the axial direction, a direction perpendicular to the axial direction is referred to as the radial direction and a direction along the circumference of the central axis O is called the circumferential direction. In addition, the section of the wheel axle 11 , which is located axially outside of at least the section on which the stator 13 is attached, with an external thread section 11a educated.

(Rotor)

2nd is a side view of the hub dynamo 10th and 3rd is a cross-sectional view of the hub dynamo 10th .

As in 2nd and 3rd the rotor is illustrated 12 mainly from a hub body 100 .

The hub body 100 consists of a cylindrical body section (pipe section) 61 and a first end plate 70 and a second end plate 80 that both end openings of the fuselage section 61 block in the axial direction.

As in 3rd the opening of the fuselage section is shown 61 on one side of the first end P (left side in 3rd ) the wheel axis 11 open during manufacture and the second end plate 80 that are separate from the fuselage section 61 is made is in the end of the fuselage section 61 on the first end side P the wheel axle 11 after a predetermined manufacturing process pressed in and fixed to block the opening.

The opening of the fuselage section 61 on one side of the second end Q (right side in 3rd ) the wheel axis 11 is from the time of manufacture by the first end plate 70 blocks that are integral with the fuselage section 61 is formed. The cylindrical fuselage section 61 and the first end plate 70 that the opening of the fuselage section 61 on the side of the second end Q the wheel axle 11 are blocked as a main hub body 60 manufactured, which is an integral part. The main hub body 60 and the second end plate 80 , which is separated from the main hub body, are made by press molding magnetic metal plates (mainly iron plates) each having a constant thickness.

A pair of left and right flange sections 62 that protrude radially outward are on outer peripheries of both ends of the fuselage section 61 the main hub body 60 formed in the axial direction. The respective flange section 62 is achieved by folding a metal plate, which is a material, during press molding and overlaying an axially inner flange plate 62a and an axially outer flange plate 62b formed on one another in the axial direction in a closed contact state in a U-shape. A variety of support breakthroughs 63 that perform in the axial direction is equally spaced in a circumferential direction in each flange portion 62 educated.

As in 1 Shown are inner ends of a variety of spokes 2nd that is from a rim 5a of the front wheel 5 extend to an inner diameter side, in the support openings 63 a. In addition, the support breakthroughs 63 of the left and right flange section 62 arranged in such a way that their phases are shifted from each other by half a place.

The first end plate 70 showing the opening of the fuselage section 61 on the side of the second end Q the wheel axle 11 blocked, has an annular side wall 71 that are in a conical shape to an axially outer side (second end side Q the wheel axle 11 ) swells, a cylindrical bearing seat wall 73 that on an inner peripheral edge of the side wall 71 to an axially inner side (first end side P the wheel axle 11 ) is bent, a preload wall 74 that at the end of the bearing seat wall 73 on the axially inner side (first end side P the wheel axle 11 ) is bent to a radially inner side, and a flange portion 75 that is continuous from an outer peripheral edge of the side wall 71 is provided towards a radially outer side.

The fuselage section 61 and the first end plate 70 are integrated because of the flange section 75 integral and continuous with the outer flange plate 62b of the flange section 62 of the fuselage section 61 on the side of the second end Q the wheel axle 11 is provided. The main hub body serving as an integral part is correspondingly 60 set up.

In addition, the second plate 80 showing the opening of the fuselage section 61 on the first end side P the wheel axle 11 blocked, a circular side wall 81 , a cylindrical bearing seat wall 83 that on an inner circumferential edge of the side wall 81 to an axially inner side (second end side Q the wheel axle 11 ) is bent, a preload wall 84 that at the end of the bearing seat wall 83 on the axially inner side (side of the second end Q the wheel axle 11 ) is bent to the radially inner side, and a cylindrical press-fit wall 85 that are on an outer peripheral edge of the side wall 81 to the axially inner side (second end side Q the wheel axle 11 ) is bent.

The second end plate 80 is going to the fuselage section 61 by pressing in the cylindrical press-fit wall 85 into an inner circumference of the opening of the fuselage section 61 of the main hub body 60 on the first end side P the wheel axle 11 fixed.

The radially inner sides of the bearing seat walls 73 and 83 the first end plate 70 and the second end plate 80 are as through openings 72 and 82 opened, which are arranged coaxially and the bearings 21st and 22 are corresponding to the inner circumference of the bearing seat walls 73 and 83 adjusted which the through openings 72 and 82 define. The rotor 12 which mainly comes from the hub body 100 is also formed by the wheel axle 11 about the camp 21st and 22 rotatably mounted and rotates with the rotation of the front wheel 5 around the wheel axis 11 . That is, the rotor 12 acts as a hub which is the front wheel 5 rotatable.

A permanent magnet 19th For example, which is made of ferrite or the like, is on an inner periphery of the fuselage portion 61 of the main hub body 60 arranged. The radius of curvature of an outer peripheral surface of the permanent magnet 19th is equal to the radius of the inner peripheral surface of the fuselage section 61 set and the permanent magnet 19th is arranged in a state in which the permanent magnet 19th directly, and not through a yoke, in close contact with an inner periphery of the fuselage section 61 , which is made of a magnetic material, is brought and glued to it, for example, by an adhesive or the like. The permanent magnet 19th covers the entire outer peripheral surface of the stator 13 by the permanent magnet 19th in a cylindrical shape along the inner peripheral surface of the fuselage section 61 is arranged. In addition, the permanent magnet 19th in the inner circumference of the fuselage section 61 assembled in a state in which the permanent magnet is split into a plurality of parts in the circumferential direction.

On the inner peripheral surface of the permanent magnet 19th , which is arranged in the cylindrical shape, become magnetic poles of an N pole and an S pole along the circumferential direction alternately magnetized. Specifically, a total of twenty magnetic poles, ten N poles and ten S poles are magnetized in such a way that an N pole and an S pole are aligned alternately.

(Stator)

4th is a perspective view of a stator 13 .

As in 3rd and 4th shown is the stator 13 by combining a first stator unit 20A and a second stator unit 20B of a "claw pole type" in the axial direction of the wheel axis 11 set up, the first stator unit 20A outputs an A-phase alternating current or voltage and the second stator unit 20B outputs a B-phase alternating current or voltage.

Each of the stator units 20A and 20B includes a tubular stator core 91 that is external to the wheel axle 11 adapted and attached to it, a coil former 92 on the stator core 91 externally adapted and attached to it, a coil 93 that are ring-shaped around the bobbin 92 is wound and a claw unit 94 that is formed around the circumference of the bobbin 92 from both end sides of each bobbin 92 cover in the axial direction. Additionally have the first stator unit 20A or the second stator unit 20B almost the same configuration. Thus, in the following first embodiment, mainly the first stator unit 20A described and if necessary differences between the first stator unit 20A and the second stator unit 20B described.

5 is a perspective view of the bobbin 92 and the stator core 91 the first stator unit 20A and 6 is a view as seen from arrow A of the 5 is seen.

As in 5 and 6 the stator core is shown 91 formed in a cylindrical shape by bending a plate material that is magnetic and has a substantially C-shaped cross section. The stator core accordingly 91 with a slot section (wiring section) 91a formed along the axial direction.

In the bobbin 92 become a tubular fuselage section 92a which is external to the stator core 91 is fitted and fixed thereon, and a pair of flange portions 92b and 92c that are integral with both ends of the fuselage section 92a are formed in the axial direction, integrally molded. The sink 93 becomes ring-shaped within a housing recess 95 that from an outer peripheral surface of the fuselage section 92a and inner surfaces of the pairs of flange portions 92b and 92c is formed, wound.

In addition, a communication section (wiring section) 96 integrally formed along the axial direction at a point which is the slit portion 91a of the stator core 91 corresponds to, on the inner peripheral surface of the fuselage section 92a . After the communication section 96 is formed in a square tubular shape so that the communication section into the slot section 91a two coils can be fitted 93 be inserted in the communication section.

The positions of the slot section correspond here 91a of the stator core 91 and the communication section 96 of the bobbin 92 a first slot section 103a (described below) that in the claw unit 94 is formed. Accordingly, the coil 93 through the communication section 96 (detailed below).

In addition, the bobbin 92 the second stator unit 20B not with the communication section 96 educated.

In addition there are slit sections 97a and 97b ((First) bobbin side slot portion 97a and (second) bobbin side slot portion 97b) each along the radial direction in the pair of outer flange portions 92b and 92c educated. The slot sections 97a and 97b are formed around the coil 93 (End of the coil) around the housing recess 95 is wound in the direction of the radially outer side of the bobbin 92 pull out and be from outer peripheral edges of the flange sections 92b and 92c from to a position just before the fuselage section 92a educated. In addition, the slot sections 97a and 97b on circumferentially from the communication section 96 staggered positions.

In addition, there are three positioning tabs 98a and three positioning tabs 98b each having a substantially semicircular cross section in the outer surfaces of the pair of outer flange portions 92b and 92c educated. The three positioning tabs 98a which on the outer flange section 92b on the first end side P the wheel axle 11 are formed, and the three positioning protrusions 98b which on the outer flange section 92c on the side of the second end Q the wheel axle 11 are formed, are arranged at equal intervals in the circumferential direction. The positioning tabs 98a and 98b are formed around the claw unit 94 to position.

Here are the positions of the slot section 97a and the positioning lead 98a which on the outer flange portion 92b on the first end side P the wheel axle 11 are formed, and the positions of the slit portion 97b and the positioning lead 98b which on the outer flange portion 92c on the side of the second end Q the wheel axle 11 are not set at positions which overlap each other in the axial direction and are arranged to be shifted in the circumferential direction (described in detail below). This is because two claws 94a and 94b which the claw unit 94 form, are positioned accordingly and separately from each other. Below is the claw unit 94 described in detail.

7 is a perspective view of a first claw 94a which the claw unit 94 forms, and 8th is a top view when the first claw 94a is viewed from the axial direction.

Here is the claw unit 94 from the first claw 94a by the bobbin 92 on the first end side P (Reference to 3rd ) the wheel axis 11 is attached, and the second claw 94b by the bobbin 92 on the side of the second end Q (Reference to 3rd ) the wheel axis 11 is appropriate, formed. In addition, after the two claws 94a and 94b have the same shape, only the first claw in the following description 94a be described and the second claw 94b will be described if necessary.

As in 7 and 8th are shown in the first claw 94a a substantially disc-shaped side plate section 101 which on the outer flange section 92b of the bobbin 92 on the first end side P (compare 5 ) the wheel axis 11 and the stator core 91 on the first end side P the wheel axle 11 abuts or abuts, and a plurality of tooth sections 102 ( 102-1 ), which from an outer peripheral edge of the side plate portion 101 bent and extending therefrom in the axial direction, integrally formed. The axial length of the tooth sections 102 ( 102-1 ) is set to be approximately equal to the axial length of the bobbin 92 to be.

zu erfüllen, wenn die Anzahl der magnetischen Pole des Permanentmagneten 19 des Rotors 12 gleich P ist. In der ersten Ausführungsform ist, nachdem die Anzahl P der magnetischen Pole auf zwanzig Pole festgelegt, die Anzahl A der Zahnabschnitte 102 auf den folgenden Ausdruck festgelegt. $$\text{A}=\text{P}/2=20/2=10$$

Here is the number A of tooth sections 102 set to $$\text{A}=\text{P}/\mathrm{2nd}$$

to meet when the number of magnetic poles of the permanent magnet 19th of the rotor 12 equal P is. In the first embodiment, after the number P of the magnetic poles is set to twenty poles, the number A of the tooth sections 102 set to the following expression. $$\text{A}=\text{P}/\mathrm{2nd}=\mathrm{20th}/\mathrm{2nd}=\mathrm{10th}$$

In addition, the variety of tooth sections 102 ( 102-1 ) arranged at equal intervals in the circumferential direction and is arranged around the permanent magnet 19th of the rotor 12 to correspond via a gap in the radial direction. In addition, the tooth sections 102 ( 102-1 ) formed in such a size that each of the tooth sections 102 ( 102-2 ) of the second claw 94b between the two tooth sections lying side by side in the circumferential direction 102 ( 102-1 ) is inserted.

A U-shaped groove 101a is between the tooth sections lying side by side in the circumferential direction 102 on an outer peripheral edge of the side plate portion 101 educated. Accordingly, it is possible to prevent local stresses on connecting portions between the side plate portion 101 and the tooth sections 102 occur or be exercised, and the tooth portions can be prevented 102 ( 102-2 ) of the second claw 94b the side plate section 101 the first claw 94a touch.

In addition, the center of the side plate section 101 in the radial direction with an insertion opening 101b formed, which allows the wheel axle 11 is introduced through there. In addition, there are a plurality of (five in this first embodiment) slots 103 at equal intervals in the circumferential direction around the insertion opening 101b on the side plate section 101 educated.

As in detail in 8th shown, the slots serve 103 to suppress an eddy current that hits the first claw 94a flows, and also as passage sections for the coils 93 through which the coils 93 (Ends of the coils) that are towards the axially outer side of the bobbin 92 pulled out, inserted. The slot 103 is between the U-shaped groove 101a and the insertion opening 101b arranged and is formed such that a first slot section 103a , which extends along the radial direction, and a second slot portion 103b which is bent and extends along the circumferential direction from a radially outer end of the first slot portion 103a extends from, communicate with each other.

The formation position of the second slit section 103b is on the radially inner side of the U-shaped groove 101a of the side plate section 101 fixed. That is, the formation position of the second slit portion 103b is in the middle of the U-shaped groove 101a in the circumferential direction of the side plate portion 101 arranged and on the radially inner side of the side plate portion 101 fixed. Accordingly, the second hinders Slot section 103b no transmission of a magnetic flux through the tooth sections 102 over the side plate section 101 to the stator core 91 is caused.

The formation position of the first slot section 103a is described in more detail.

Accordingly, if the total number (hereinafter referred to as the total number of tooth sections 102 ) of the tooth sections 102 ( 102-1 ) the first claw 94a and the tooth sections 102 ( 102-2 ) of the second claw 94b SA is a shift angle ΔD between a circumference center P1 a first slot section 103a and a circumference center P2 a tooth section 102 priced to meet the following expression. $$\Delta \text{D}=360/\left(\text{SAT}\times \mathrm{2nd}\right)$$

In the first embodiment, after the total number SA of the tooth portions 102 20th is the displacement angle ΔD between the center of the circumference P1 of the first slot section 103a and the circumference center P2 of the tooth section 102 set to the following expression. $$\Delta \text{D}=360/\left(\text{SAT}\times \mathrm{2nd}\right)=360/\left(\mathrm{20th}\times \mathrm{2nd}\right)=9\text{Degree}$$

Here is the number of tooth sections 102 each of the claws 94a and 94b ten, the angle between the circumferential centers of two adjacent tooth sections 102 in the circumferential direction is 360/10 = 36 degrees, and the angle between a center P3 between the two adjacent tooth sections 102 in the circumferential direction and the circumferential center P2 of the tooth section 102 is 36/2 = 18 degrees.

That means the circumference center P1 of the first slot section 103a a middle between the middle P3 between the two adjacent tooth sections 102 in the circumferential direction and the circumferential center P2 of the tooth section 102 is.

Based on such a configuration as in 1 and 4th shown is the first claw 94a from the bobbin 92 on the first end side P the wheel axle 11 attached and the second claw 94b is from the bobbin 92 on the side of the second end Q the wheel axle 11 appropriate. Also the side plate section (first side plate section) 101 the first claw 94a to the outer flange section 92b of the bobbin 92 on the first end side P (compare 5 ) the wheel axis 11 and the stator core 91 on the first end side P the wheel axle 11 abuts against it and the side plate section (second side plate section) 101 the second claw 94b lies on the outer flange section 92c of the bobbin 92 on the side of the second end Q (compare 5 ) the wheel axis 11 and the stator core 91 on the side of the second end Q the wheel axle 11 bumps into.

In addition, the tooth sections 102 ( 102-2 ) of the second claw 94b each between the tooth sections 102 ( 102-1 ) the first claw 94a that are adjacent to each other in the circumferential direction. That is, in the claw unit 94 are the tooth sections 102 ( 102-1 ) the first claw 94a and the tooth sections 102 ( 102-2 ) of the second claw 94b alternately arranged in the circumferential direction.

In addition, the claws 94a and 94b each in the positioning tabs 98a and 98b that on the outer flange sections 92b and 92c of the bobbin 92 are formed, whereby the positions of the claws are determined and displacement of the claws in the circumferential direction is prevented.

Here is the shift (phase shift) in the circumferential direction between the first claw 94a and the second claw 94b 36/2 = 18 degrees, equal to the angle between the middle P3 between the two tooth sections 102 that are side by side in the circumferential direction and the circumferential center P2 of the tooth section 102 .

That is, as in 6 shown that the displacement angle Δθ between the positions of the slot portion 97a and the positioning lead 98a which on the outer flange portion 92b on the first end side P the wheel axle 11 are formed, and the positions of the slit portion 97b and the positioning lead 98b which on the outer flange portion 92c on the side of the second end Q the wheel axle 11 are set is set to 18 degrees.

In addition, as detailed in 8th shown the displacement angle ΔD between the center of the circumference P1 of the first slot section 103a of the slot 103 that in each of the claws 94a and 94b is formed, and the circumferential center P2 of the tooth section 102 set to satisfy expression (2). For this reason, the first slot section overlap 103a who is in the first claw 94a is formed, and the first slot portion 103b who is in the second claw 94b is formed, each in the axial direction.

Here the educational position corresponds to the communication section 96 that in the bobbin 92 is formed, the first slot portion 103a each of the claws 94a and 94b . For this reason, the communication section communicates 96 and the first slot section 103a each of the claws 94a and 94b together.

In addition, the formation positions of the slit sections correspond 97a and 97b that in the bobbin 92 are formed, the U-shaped grooves 101a the corresponding claw 94a and 94b . The formation position of the slit portion is more specific 97a in the middle of the U-shaped groove 101a the claw 94a arranged in the circumferential direction and the formation position of the slit portion 97b is in the middle of the U-shaped groove 101a the claw 94b arranged in the circumferential direction. For this reason, the second slit portion overlaps 103b the slot sections 97a and 97b that in the bobbin 92 are formed in the axial direction. The second slot section communicates accordingly 103b and each of the slot sections 97a and 97b together.

The first stator unit 20A and the second stator unit 20B are based on such an arrangement with the wheel axle 11 aligned and attached to it. A spacer 104 is between the first stator unit 20A and the second stator unit 20B provided. The spacer 104 has a ring shape so that the spacer on the wheel axle 11 externally adjusted and fixed or fixed and a slot 104a is formed at a point that the communication section 96 of the bobbin 92 and the first slot section 103a each of the claws 94a and 94b corresponds. By forming the slit 104a can prevent the communication section 96 of the bobbin 92 and the first slot section 103a each of the claws 94a and 94b through the spacer 104 be blocked.

Correspondingly, by providing the spacer 104 , a gap K1 of a predetermined extent which the stator units 20A and 20B separates from each other in the axial direction, between the first stator unit and the second stator unit 20B secured. The gap K1 is used as a space for wiring the coil 93 used.

In addition, the first stator unit 20A and the second stator unit 20B connected together so that the positions of the tooth sections 102 of the respective stator units 20A and 20B are shifted from each other by a predetermined angle, ie the phases of the tooth sections are shifted from one another. Accordingly, a two-phase alternating current or voltage (A phase and B phase), which are phase-shifted from one another, is generated by the respective coil 93 of the respective stator unit 20A and 20B spent.

In addition to the first stator unit 20A and the second stator unit 20B to be arranged such that the phases thereof are shifted from each other as described above, the communication section 96 not in the bobbin 92 the second stator unit 20B educated. After the communication section 96 is not formed, the communication section fits 96 not in the slot section 91a of the stator core 91 . For this reason, the rotation of the second stator unit 20B rotatable in the circumferential direction and can with a predetermined angle in the circumferential direction based on the first stator unit 20A be rotated and fixed. A method of fixing the first stator unit 20A and the second stator unit 20B will be described below.

(Pulling out of the coil)

Here are procedures of pulling out the coil 93 that around the first stator unit 20A is wound and the coil 93 that around the second stator unit 20B is wrapped, with reference to 3rd to 5 and 7 described.

First, a method of pulling out the coil 93 (first coil 93a) that around the first stator unit 20A is described.

An initial end side of the coil 93 ( 93a ) becomes the first end side P the wheel axle 11 over the slot section 97a that in the outer flange portion 92b of the bobbin 92 on the first end side P the wheel axle 11 is formed, pulled out and is in this state around the housing recess 95 of the bobbin 92 wrapped. A connection end of the coil 93 ( 93a ) also becomes the first end side P the wheel axle 11 over the slot section 97a pulled out. In addition, a connection section of the coil 93 ( 93a ) coming from the slot section 97a was pulled out to the side of the first end P the wheel axle 11 over the second slot section 103b the first claw 94a pulled out that with the slot section 97a communicates.

The following is a method of pulling out the spool 93 (second coil 93b) that around the second stator unit 20B is described.

Also a start-end side of the coil 93 ( 93b ) becomes the first end side P the wheel axle 11 over the slot section 97a that in the outer flange portion 92b of the bobbin 92 on the first end side P the wheel axle 11 is formed, pulled out and in this state around the housing recess 95 of the bobbin 92 wrapped. A connection end of the coil 93 ( 93b ) also becomes the first end side P the wheel axle 11 over the slot section 97a pulled out. In addition, a connection section of the coil 93 ( 93b ) from the slot section 97a is pulled out to the side of the first end P the wheel axle 11 over the second slot section 103b the first claw 94a pulled out that with the slot section 97a communicates.

The connection section of the coil 93 ( 93b ) from the first claw 94a to the first end side P the wheel axle 11 has been pulled out through the connection section 96 the first stator unit 20A and the first slot section 103a each of the claws 94a and 94b about the gap K1 between the first stator unit 20A and the second stator unit 20B is formed, and the slot 104a of the spacer 104 inserted. Also the connection section of the coil 93 ( 93b ) becomes the first stator unit 20A on the first end side P the wheel axle 11 pulled out.

Accordingly, the connection section of the coil 93 ( 93a ) in the first stator unit 20A and the connection section of the coil 93 ( 93b ) in the second stator unit 20B together to the stator 13 on the first end side P the wheel axle 11 pulled out.

(Regulatory section)

As in 3rd a regulating section is shown 105 , which determines the axial movement and circumferential rotation of the stator 13 regulated, on the sections of the wheel axle 11 provided in the axial direction on both sides of the stator 13 are arranged. The regulating section 105 includes a special mother 30th that on the stator 13 on the first end side P the wheel axle 11 in the wheel axle 11 is provided, and a stator fixing element 37 that on the side of the second end Q the wheel axle 11 is provided.

The first stator unit 20A and the second stator unit 20B which the stator 13 are made by the special mother 30th , the stator fixing element 37 and the spacer 104 between the first stator unit 20A and the second stator unit 20B is provided, inserted and fixed at fixed positions in the axial direction. The rotation in the circumferential direction of the first stator unit 20A and the second stator unit 20B is regulated by the frictional resistance caused by the insertion.

The special mother 30th includes a sleeve portion 30a that is on the side of the first end P the wheel axle 11 is formed, and a flange portion 30b that is on the side of the first end P the wheel axle 11 is formed and an enlarged outer diameter based on the sleeve portion 30a Has. The special nut is also by screwing an internally threaded section 30d , which is formed on an inner circumference of the special nut, on an externally threaded portion 11a the wheel axle 11 , on an outer circumference of the wheel axle 11 attached or fixed.

An outer peripheral surface of the sleeve portion 30b is on an inner circumference of an inner ring of a bearing 22 fixed, in which an outer ring on the bearing seat wall 83 the second plate 80 is fitted by pressing or the like. The flange section 30b is formed to have a larger outside diameter than the inside diameter of the bearing 22 to have and an end surface of the flange portion that is on the side of the first end P the wheel axle 11 is located on the inner ring of the bearing 22 in the axial direction. An outer ring side of the bearing is correspondingly 22 rotatable around the wheel axis 11 appropriate.

In addition, there is the end surface of the flange section 30b that are on the side of the second end Q the wheel axle 11 is arranged on the side plate portion 101 the first claw 94a which is the first stator unit 20A forms, in the axial direction.

Here, as in 4th shown a groove 30c for pulling out the connection section of the coil 93 which to the stator 13 on the first end side P the wheel axle 11 was pulled out to the outside of the hub dynamo 10th formed at a position that matches the slot 103 corresponds to that in the first claw 94a in an outer peripheral surface of the special nut 30th is formed.

As in 3rd a connector is shown 40 outside the second end plate 80 arranged and the connection section of the coil 93 is in the connector 40 introduced. The connection section of the coil 93 becomes a lead wire pulling section 43 of the connector 40 over the inside of the groove 30c (compare 4th ) the special mother 30th guided and to the outside of the hub dynamo 10th through the lead wire pulling section 43 pulled out. A sleeve section 30a the special mother 30th is through an inner peripheral portion of the connector 40 introduced and the connector 40 is with the wheel axle 11 by a mother 46 over a washer 45 fixed.

A sleeve 50 is in the wheel axis 11 closer to the side of the second end Q the wheel axle 11 as the stator fixation element 37 provided. The sleeve 50 is a tubular member, of which an inner peripheral surface with an internally threaded portion 50c is formed and that on the external thread section 11a the wheel axle 11 on the side of the second end Q the wheel axle 11 is screwed. The sleeve 50 specifically includes a main sleeve body 50a that is on the side of the first end P the wheel axle 11 is formed, and a flange portion 50b that is on the side of the second end Q the wheel axle 11 is formed and an enlarged outer diameter based on the main sleeve body 50a Has.

The flange section 50b is formed in a polygonal tubular shape and the end surface thereof on the first end side P the wheel axle 11 borders on an inner ring of a bearing 21st on one side of the first plate 70 in the axial direction. The main sleeve body 50a is formed in a cylindrical shape and internally in an inner circumference of the inner ring of the bearing 21st on the side of the first plate 70 fitted. The main sleeve body is specific 50a specified that the outside diameter thereof be equal to or slightly larger than the inside diameter of the bearing 21st and to the inner circumference of the inner ring of the bearing 21st is fixed or fixed by pressing or the like.

A cover 54 is on the outside of the first end plate 70 attached to the camp 21st and the sleeve 50 to cover. The cover 54 is an element formed in a bowl shape, that is, a truncated conical shape that is open on one side, and prevents water, dust, or the like from outside from inside the rotor 12 penetrates. A mother 52 that on the wheel axle 11 is screwed is on an inner peripheral portion of the cover 54 attached to the sleeve 50 hold in place.

(Power generation mechanism)

Power generation of the hub dynamo 10th arranged in this way is carried out in the following manner.

Accordingly, when the front wheel rotates 5 rotates, the rotor 12 with the front wheel 5 through the spokes 2nd is connected, together with the front wheel 5 around the wheel axis 11 and the permanent magnet 19th rotates around the stator 13 .

Due to the magnetic flux of the rotating permanent magnet 19th alternate a state in which the tooth section 102 ( 102-1 ) the first claw 94a that is on the side of the first end P the wheel axle 11 in each of the stator units 20A and 20B is provided, assumes an S-pole, a state in which the tooth portion 102 ( 102-2 ) of the second claw 94b that is on the side of the second end Q the wheel axle 11 is provided, assumes an N pole, a state in which the tooth portion 102 ( 102-1 ) the first claw 94a assumes an N pole and a state in which the tooth portion 102 ( 102-2 ) of the second claw 94b that on the side of the second end Q the wheel axle 11 is provided, assumes an S pole, repeated.

Accordingly, changing magnetic fluxes in the stator core 91 the A-phase first stator unit 20A and the stator core 91 the B-phase second stator unit 20B generated and the alternating magnetic fluxes cause that in the coils 93 ( 93a , 93b ) of the first and second stator units 20A and 20B Currents flow, thereby generating electricity.

In this case, the alternating current or voltage output is the coil 93 ( 93a ) of the first stator unit 20A and the alternating current or voltage output of the coil 93 ( 93b ) of the second stator unit 20B phase shifted from one another and the alternating voltages do not simultaneously drop to 0 V.

(Effects)

In the first embodiment described above, the bobbin 92 the first stator unit 20A with the communication section 96 provided, and the coil 93 that around the second stator unit 20B is wrapped becomes the first end side P the wheel axle 11 in the first stator unit 20A about the communication section 96 pulled out. For this reason, for example, it is not necessary to use the coil 93 around an outer peripheral portion of the hub dynamo 10th to lead. Thus, the connection sections of the coils 93 that around the two stator unit 20A and 20B are wound, overall from the first end side P the wheel axle 11 can be pulled out without the design or functions of the hub dynamo 10th to affect.

In addition, the communication section 96 integrally on an inner peripheral surface side of the fuselage portion 92a of the bobbin 92 formed and the stator core 91 is with the slot section 91a formed in which the communication section 96 is fitted. For this reason, the coil 93 that around the bobbin 92 the first stator unit 20A is wound, not with the second stator unit 20B wired or connected. Thus, the connection sections of the coils 93 that around the two stator units 20A and 20B are wound, total from the side of the first end P the wheel axle 11 can be pulled out with a simple structure and it can be prevented that the space factor of the coil 93 that around the bobbin 92 the first stator unit 20A is wound, reduced.

In addition, after the communication section 96 in the slot section 91a fits, also prevent the bobbin 92 themselves with respect to the wheel axle 11 turns and the bobbin 92 can be easily positioned.

The path of the coil can also be used 93 be the shortest path after the slot section 91a of the stator core 91 and the communication section 96 along the axial direction of the wheel axis 11 are formed.

In addition, the coil 93 (the end of the coil) from each side plate section 101 by forming the slits (a first passage portion and a second passage portion) 103 in the side plate portion 101 each of the claws 94a and 94b which the claw unit 94 form, be pulled out smoothly or without difficulty. For this reason, the coil can be prevented 93 is bent locally and the coil can be connected or guided smoothly or without difficulty.

In addition, the first slot section 103a and the second slot section 103b the slot 103 and the displacement angle ΔD between the center of the circumference P1 of the first slot section 103a and the circumference center P2 of the tooth section 102 is set to satisfy expression (2). For this reason, even if the first claw 94a and the second claw 94b are made in the same shape, the first slot sections 103a the claw 94a and 94b be overlapped with each other in the axial direction when the two claws 94a and 94b to be assembled. Thus, a sharing or reuse of the parts can be achieved, the manufacturing costs of the hub dynamo 10th be reduced and the mounting of the hub dynamo 10th be improved.

In addition, a situation in which an eddy current occurs in the side plate portion 101 each of the claws 94a and 94b is generated while generating power in the hub dynamo 10th is performed by forming the slot 103 be suppressed.

In addition, are in the bobbin 92 in the first embodiment described above in a case where the positions of the slit portion 97a and the positioning lead 98a which on the outer flange portion 92b on the first end side P the wheel axle 11 are formed, and the positions of the slit portion 97b and the positioning lead 98b that on the outer flange portion 92c on the side of the second end Q the wheel axle 11 are not set to positions that overlap each other in the axial direction, and are arranged to be shifted in the circumferential direction as described. In addition, a case has been described in which the slit portions concerned 97a and 97b at positions in the circumferential direction of the communication section 96 are shifted, are formed.

However, the embodiment of the invention is not limited to this. For example, as in a perspective view of the coil former 92 in a modified example of the first embodiment, which in 9 the slot section is shown 97a that on the outer flange portion 92b on the first end side P the wheel axle 11 is formed, and the slot portion 97b which on the outer flange portion 92c on the side of the second end Q the wheel axle 11 is formed so as to overlap each other in the axial direction, and may be formed such that each of the slit portions 97a and 97b and the communication section 96 communicate with each other.

In addition, even in this case, the position of the positioning protrusion is necessary 98a which on the outer flange section 92b on the first end side P the wheel axle 11 is formed, and the position of the positioning protrusion 98b which on the outer flange section 92c on the side of the second end Q the wheel axle 11 is formed according to the phases of the corresponding claws 94a and 94b to be determined.

(Second embodiment)

(Hub dynamo)

Next, a second embodiment of the invention will be referred to in FIG 10th and 11 described. In addition, the same aspects as those of the aforementioned first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

10th is a cross-sectional view of the hub dynamo 210 in this second embodiment.

As shown in this drawing, the difference between the aforementioned first embodiment and the second embodiment is that the bobbin 92 the first stator unit 20A in the first embodiment with the communication section 96 is formed, but a bobbin 292 a first stator unit 220A in the second embodiment is not with the communication section 96 educated. Also runs in the slot section 91a of the stator core 91 the first stator unit 20A and the slot portion 91a of the stator core 91 the second stator unit 20B one through the two slot sections 91a introduced lead wire unit 206 .

(Lead wire unit)

11 is a side view of the lead wire unit 206 .

The lead wire unit is as shown in this drawing 206 through two lead wires 207 and a resin molding section (cover section) 208 which is molded of resin around the guide wires 207 cover, formed.

The cross-sectional area of the resin molding section 208 is set to a size so that the resin molding portion in the slit portion 91a of the stator core 91 in each of the stator units 20A and 20B can run. In addition, the length of the resin molding section 208 set to a length so that both ends of the resin molding portion in a state in which each of the stator units 20A and 20B on the wheel axle 11 is attached easily from each of the stator units 20A and 20B protrude.

Connection sections of the two lead wires 207 stand from both ends of the resin molding section 208 in front.

Based on such a configuration as in 10th is shown, the start end and the connection end of the coil 93 ( 93b ) around the second stator unit 20B is wound to the side of the second end Q the wheel axle 11 over the slot section 97a that in the outer flange portion 92b on the side of the second end Q (right side in 10th ) the wheel axis 11 in the bobbin 92 is drawn out. Also the start end and the connection end of the coil 93 ( 93b ) are each with one-sided ends of the two lead wires 207 the lead wire unit 206 connected by soldering material.

The other ends of the two lead wires 207 the lead wire unit 206 become the side of the first end P (left side in 10th ) the wheel axis 11 pulled out, along with the spool 93 ( 93a ) around the first stator unit 20A is wrapped.

Therefore, according to the second embodiment described above, as in the aforementioned first embodiment, it is not necessary to use the coil 93 ( 93b ) around the second stator unit 20B is wrapped by the communication section 96 the first stator unit 20A and the first slot section 103a each of the claws 94a and 94b introduce. For this reason, the ability to install the hub dynamo 210 be improved.

In addition, the first stator unit 20A and the second stator unit 20B can be provided so as to have the same structure, the number of parts can be reduced, and management of the parts can be made easy.

In addition, the start end and the connection end of the coil 93 ( 93b ) around the second stator unit 20B is wound to the side of the second end Q the wheel axle 11 that of the first stator unit 20A opposite, are pulled out. Also, by simply connecting the start end and the connection end of the pulled out coil 93 ( 93b ) to one-sided ends of the two lead wires 207 the lead wire unit 206 , the start end and the connection end of the coil 93 ( 93b ) around the second stator unit 20B is wrapped up just as if it were to the side of the first end P the wheel axle 11 be pulled out. For this reason, guiding the start end and the connection end of the coil 93 ( 93b ) around the second stator unit 20B is wound, simplified and the assembly processability of the hub dynamo can be further improved.

In addition, in the second embodiment described above, a case has been described in which the start end and the connection end of the coil 93 ( 93b ) with one-sided ends of the two lead wires 207 the lead wire unit 206 be connected with soldering material. Nevertheless, the embodiment of the invention is not limited to this and the coil 93 ( 93b ) and the lead wires 207 just have to be connected. For example, it is also possible to carry out the connection using a crimp connection or the like.

In addition, in the second embodiment described above, a case has been described in which the lead wire unit 206 through the two lead wires 207 and the resin molding section 208 which is molded of resin around the lead wires 207 to cover, is formed. However, the embodiment of the invention is not limited to this and the two lead wires 207 the lead wire unit 206 only need to be covered with an insulating element. For example, the two lead wires 207 with a hose made of a resin instead of the resin molding section 208 be covered.

Further, it should be understood that the invention is not limited to the above-described embodiments, but various modifications can be added to the above-described embodiments without departing from the spirit of the invention.

For example, in the above-described embodiments, a case has been described in which the first stator unit 20A and the second stator unit 20B that the stator 13 form, penned or inserted and at fixed positions in the axial direction by the special nut 30th , the stator fixing element 37 and the spacer 104 between the first stator unit 20A and the second stator unit 20B is provided, held or fixed. Also a case in which the circumferential rotation of the first stator unit 20A and the second stator unit 20B is also regulated by the frictional resistance caused by the potting or inserting, has been described. Nevertheless, the embodiments of the invention are not limited to this and circumferential positioning means can be provided separately, so that the first stator unit 20A and the second stator unit 20B are combined together in a relationship in which their circumferential phases are shifted from each other by a predetermined angle.

In addition, there was a case where the bobbin 92 the second stator unit 20B not with the communication section 96 is formed, described in the embodiments described above. However, the embodiments of the invention are not limited to this and the coil body 92 the second stator unit 20B can with the communication section 96 to be provided. In this case, it is desirable that the position of the communication section 96 that in the bobbin 92 the second stator unit 20B is formed such that the peripheral phase of the second stator unit 20B with respect to the first stator unit 20A is shifted by a predetermined angle.

In addition, in the above-described embodiments, a case has been described in which the stator 13 from the two stator units 20A and 20B is formed. Nevertheless, the embodiments of the invention are not limited to this and the stator 13 can be formed from three or more stator units. In this case, the communication section 96 only in the bobbin 92 may be formed with a desired stator unit based on a direction in which the coil 93 which is wrapped around each stator unit.

There was also a case where the five slots 103 at equal intervals in the circumferential direction around the insertion opening 101b in the side plate section 101 each of the claws 94a and 94b are described in the above-described embodiments. However, the number of slots 103 not limited to five.

According to the hub dynamo of the invention, the second coil can be pulled out through the wiring portion to a side of the first stator unit that is opposite to a second stator unit side. For this reason, all of the connection portions of the coils that are wound around the corresponding stator units can be pulled out in the same direction without affecting the formability or functions of the hub dynamo.

Reference symbol list

5:

FRONT WHEEL (WHEEL)

10:

HUB DYNAMO

11:

WHEEL AXLE

12:

ROTOR

19:

PERMANENT MAGNET (MAGNETIC POLE)

20A:

FIRST STATION UNIT

20B:

SECOND STATION UNIT

61:

HULL SECTION (TUBE SECTION)

91:

STATOR CORE (CORE)

91a:

SLOT SECTION (WIRING SECTION)

92:

BOBBIN

92a:

HULL SECTION

93:

KITCHEN SINK

93a:

COIL (FIRST COIL)

93b:

COIL (SECOND COIL)

94:

CLAW UNIT

94a:

FIRST CLAW

94b:

SECOND CLAW

96:

COMMUNICATION SECTION (WIRING SECTION)

97a:

SLOT SECTION ((FIRST) COIL BODY SIDE SLOT SECTION)

97b:

SLOT SECTION ((SECOND) COIL BODY SIDE SLOT SECTION)

101:

SIDE PANEL SECTION (FIRST SIDE PANEL SECTION, SECOND SIDE PANEL SECTION)

102:

TOOTH SECTION

102-1:

FIRST TOOTH SECTION

102-2:

SECOND TOOTH SECTION

103:

SLOT (FIRST THROUGH SECTION, SECOND THROUGH SECTION)

103a:

FIRST SLOT SECTION

103b:

SECOND SLOT SECTION

206:

INLET WIRE UNIT

207:

LEAD WIRE

208:

RESIN CASTING SECTION (COVER SECTION)

Claims (11)

Hub dynamo (10), which has: a rotor (12) rotating together with a wheel and having a tube portion (61) having magnetic poles (19) formed on an inner peripheral surface thereof; at least two stator units (20A, 20B) arranged within the tube section and comprising a first stator unit (20A) with a first coil (93a) and a second stator unit (20B) with a second coil (93b); and a wheel axle (11) which is provided to pass through radially inner sides of the coils (93a, 93b) and to which the stator units (20A, 20B) are externally adapted and fixed, wherein the first stator unit (20A) has a wiring portion (96) in which one or one of the second coil (93b) and a lead wire (207) connected to the second coil runs; the first stator unit comprising: a bobbin (92) having a tubular body portion (92a) around which the first coil (93a) is wound; a tubular core (91) disposed between the wheel axle (11) and the fuselage section (92a); and a claw unit (94) which is provided to be magnetically connected to the core (91) and to face the tube section (61) in a radial direction, and wherein the wiring portion (96) is disposed in at least one of the interior of the body portion (92a) and the core (91). Hub dynamo after Claim 1 wherein the core (91) is formed with a slot portion (91a) and the slot portion is formed to act as the wiring portion (96). Hub dynamo after Claim 2 , wherein the slit portion (91a) is formed along an axial direction of the wheel axis (11). Hub dynamo after Claim 2 or 3rd wherein the bobbin (92) is formed with a communication section (96) that fits into the slot section (91a) and the communication section (96) works in cooperation with the slot section as the wiring section. Hub dynamo after Claim 4 wherein the communication section (96) communicates with an outer surface of the fuselage section (92a). Hub dynamo according to one of the Claims 1 to 5 wherein the claw unit (94) is composed of a first claw (94a) which is mounted from a first end side in an axial direction of the core (91), and a second claw (94b) which is mounted from a second end side in the axial direction Direction of the core (91) is formed, the first claw (94a) comprising: a first side plate portion (101) that comes into contact with a first end in the axial direction of the core (91); and a plurality of first tooth portions (102) extending toward a second end side in the axial direction of the core (91) from an outer peripheral edge of the first side plate portion (101) and facing the tube portion (61) in the radial direction, wherein the second claw (94b) includes: a second side plate portion (101) that comes into contact with a second end in the axial direction of the core (91) and a plurality of second tooth portions (102) that face toward the first end side in the axial direction of the core (91) extends from an outer peripheral edge of the second side plate portion (101) and faces the tube portion (61) in the radial direction, the first claw (94a) and the second claw (94b) being provided such that the the first tooth section and the second tooth section are arranged alternately in a circumferential direction, the first side plate section having a first passage section (103 ) is formed, which allows the second coil (93b) to be inserted therethrough, the second side plate portion is formed with a second passage portion (103), which allows the second coil (93b) to be inserted therethrough, and the first The passage section and the second passage section are arranged so as to overlap each other in the axial direction. Hub dynamo after Claim 6 , wherein when the total number of the first tooth portions (102) and the second tooth portions (102) is SA, a circumferential center of the first passage portion (103) at one of a circumferential center of a first tooth section is displaced by 360 / (SA × 2) degrees and a circumferential center of the second passage section (103) is arranged at a position displaced by 360 / (SA × 2) degrees from the circumferential center of a second tooth section. Hub dynamo according to one of the Claims 1 to 7 wherein a lead wire unit (206) is disposed in the wiring portion (96), the lead wire unit (206) comprising a lead wire (207) and a cover portion (208) with insulation covering the lead wire (207), and one end of the lead wire (207) is connected to the second coil (93b). Hub dynamo according to one of the Claims 1 to 8th wherein the second stator unit (20B) includes the wiring portion (96). Hub dynamo after Claim 6 or 7 , wherein the first passage portion (103) and the second passage portion (103) are formed such that a first slot portion (103a) which extends along the radial direction of the claw unit (94) and a second slot portion (103b) which is bent and extending along the circumferential direction from a radially outer end of the first slot portion (103a) communicate with each other. Hub dynamo after Claim 10 wherein a bobbin side slit portion (97a, 97b) formed in the bobbin (92) and extending in the radial direction and the second slit portion (103b) are arranged to overlap each other in the axial direction.

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