WO2019181503A1 - Vehicle wheel having hub dynamo, hub dynamo, and assembly method for vehicle wheel having hub dynamo - Google Patents

Abstract

This vehicle wheel (10) having a hub dynamo comprises: a hub insertion part (15) provided to a wheel (11), housing a hub dynamo (20), and set such that the hub dynamo (20) can only be inserted and extracted from one (P) side of a direction along a center axis (O) of a hub shaft (25); a circumferential direction coupling part (41) having a recessed part (18), which is formed in an inner circumferential surface (15f) of the hub insertion part (15), and a protruding part (28), which is formed in an outer circumferential surface (21f) of a hub shell (21), and in said circumferential coupling part (41) the recessed part (18) and the protruding part (28) couple together and thereby couple the insertion part (15) and the hub shell (21) such that the same cannot rotate in a circumferential direction around the hub shaft (25); a position determining part (42) constraining the position of the hub shell (21), which is inserted into the hub insertion part (15), in the direction along the center axis (O) of the hub shaft (25); and a restricting part (43) restricting the hub shell (21), which is inserted into the hub insertion part (15), from moving on another (Q) side of the direction along the center axis (O).

Description

Wheel with hub dynamo, hub dynamo, wheel assembling method with hub dynamo

The present invention relates to a wheel with a hub dynamo, a hub dynamo, and a method for assembling a wheel with a hub dynamo, for example, used for a wheel of a bicycle or the like.
This application claims priority on March 23, 2018 based on Japanese Patent Application No. 2018-056575 for which it applied to Japan, and uses the content here.

For example, a bicycle wheel is provided with a wheel rotatably provided on the bicycle body and a tire mounted on the outer periphery of the wheel. The wheel includes a rim that is provided on the outer periphery of the wheel and on which a tire is mounted, a hub that is disposed at the center, and a plurality of spokes that connect the rim and the hub. The hub includes a cylindrical hub cylinder, a hub shaft that is provided inside the hub cylinder and is attached to the vehicle body, and a bearing that rotatably supports the hub cylinder around the hub axis. A flange protruding radially outward is provided on the outer peripheral surface of the hub cylinder, and ends of a plurality of spokes are connected to the flange (see, for example, Patent Document 1).

Generators that generate electricity by rotating wheels are widely used to supply power to bicycle headlights and taillights. Such generators have various structures, but a so-called hub dynamo is known which is provided in a hub. In general, a hub dynamo is configured such that a rotor having a permanent magnet is disposed on the hub cylinder side, and the rotor rotates around a stator provided on the hub shaft side, thereby generating power with a coil provided in the stator. In such a hub dynamo, a hub shell that accommodates a stator and a rotor also serves as a hub cylinder, and a flange is integrally provided on the outer peripheral surface of the hub shell and connected to the end of the spoke.

Japanese Unexamined Patent Publication No. 2013-159189

By the way, for example, in a bicycle for children, there is a wheel made of resin. In addition to conventional wheels, proposals have been made to use a resin airless tire as a tire.
In the resin wheel, a rim, spokes, and a hub cylinder at the center of the rim are integrally formed. When a hub dynamo is provided on a resin wheel, the hub dynamo is built in the hub cylinder. In this case, in the hub dynamo, the hub shell is press-fitted into the hub cylinder, and the hub cylinder of the wheel and the hub shell of the hub dynamo are fitted so as not to be relatively rotatable.

However, when a hub dynamo is built in the wheel, it is difficult to remove the hub dynamo that is press-fitted from the hub cylinder of the wheel. For this reason, when the wheel is replaced for some reason, the wheel and the hub dynamo are replaced together, and the replacement cost increases. In the case of a wheel having a resin-made airless tire, when the tire is replaced due to wear of the airless tire, the cost of the hub dynamo is added in addition to the wheel, so the replacement cost is particularly high.
For these reasons, it is not practical to use a hub dynamo in the case of resin wheels, and in order to supply power to headlights, taillights, etc., a roller type equipped with a roller that presses against the tire is used. Currently, dynamo and batteries are used.

Therefore, the present invention provides a wheel with a hub dynamo, a hub dynamo, and a method for assembling a wheel with a hub dynamo that can eliminate a configuration in which a hub dynamo is press-fitted into a wheel and can reduce maintenance costs.

The present invention employs the following means in order to solve the above problems.
That is, according to the first aspect of the present invention, the wheel with the hub dynamo is provided at the center part of the wheel, the wheel provided rotatably around the hub shaft fixed to the vehicle body, and the wheel rotates. A hub dynamo that generates electric power, and is provided on the wheel to accommodate the hub dynamo, and the hub dynamo can be inserted / removed only from one side in the central axis direction of the hub shaft A concave portion formed on one of the inner peripheral surface of the hub insertion portion and the outer peripheral surface of the hub shell of the hub dynamo, and a convex portion formed on the other of the inner peripheral surface of the hub insertion portion and the outer peripheral surface of the hub shell. A circumferential engagement portion that non-rotatably engages the hub insertion portion and the hub shell in a circumferential direction around the hub shaft by engaging the concave portion and the convex portion, and the hub insertion A positioning portion for defining a position of the hub shell in the central axis direction of the hub shaft, and a restraining portion for restraining the hub shell inserted in the hub insertion portion from moving in the central axis direction. Prepare.

According to such a configuration, the hub dynamo is inserted into the hub insertion portion provided on the wheel, and the hub insertion portion and the hub shell of the hub dynamo are engaged with each other by the circumferential engagement portion. The dynamo hub shell can be engaged in a non-rotatable manner in the circumferential direction.
With the positioning part defining the position of the hub shell inserted into the hub insertion part in the central axis direction, the restraint part restrains the hub shell from moving in the central axis direction within the hub insertion part, thereby removing the hub dynamo from the wheel. It can be attached to the hub insertion part.
Since the hub dynamo can be inserted into and removed from one side in the central axis direction of the hub shaft with respect to the hub insertion portion, it is not necessary to press-fit the hub dynamo into the hub insertion portion. Therefore, the hub dynamo can be easily attached to and detached from the wheel. Thereby, when exchanging a wheel or a tire, it is not necessary to exchange a hub dynamo at the same time, and a hub dynamo removed from a wheel to be exchanged may be attached to a newly attached wheel. In this way, the configuration for press-fitting the hub dynamo into the wheel can be eliminated, and the maintenance cost can be reduced. Therefore, it is possible to employ a hub dynamo even when the wheel is made of resin.

According to the second aspect of the present invention, in the wheel with a hub dynamo according to the first aspect of the present invention, the concave portion and the convex portion are provided in plural sets at equal intervals in the circumferential direction around the hub shaft. It may be done.

According to such a configuration, when the hub dynamo is inserted and installed in the hub insertion portion by providing the concave portion and the convex portion at equal intervals in the circumferential direction with respect to the hub insertion portion and the hub shell of the hub dynamo, The direction in the circumferential direction of the hub dynamo relative to the portion is not limited. As a result, the hub dynamo can be easily assembled to the hub insertion portion.

According to a third aspect of the present invention, in the wheel with a hub dynamo according to the first aspect or the second aspect of the present invention, the concave portion and the convex portion extend along a central axis direction of the hub shaft. It may be.

According to such a configuration, the hub dynamo can be attached to and detached from the hub insertion portion by moving the hub dynamo along the concave and convex portions that are engaged with each other in the direction of the center axis of the hub shaft. Since the concave portion and the convex portion that are engaged with each other when the hub dynamo is attached to the hub insertion portion extend perpendicular to the rotation direction of the wheel, the hub insertion portion and the hub dynamo hub shell are firmly engaged in the circumferential direction. Combined.

According to a fourth aspect of the present invention, in the wheel with a hub dynamo according to any one of the first to third aspects of the present invention, the concave portion and the convex portion are located with respect to the central axis. And may be inclined and extended.

According to such a configuration, by engaging the concave portion and the convex portion with each other, the hub insertion portion and the hub shell of the hub dynamo can be engaged around the hub shaft in a non-rotatable manner. The concave portion and the convex portion have a skew structure inclined with respect to the central axis of the hub shaft. As a result, when the wheel rotates in a specific direction, it is possible to prevent the hub dynamo from rotating in the direction of coming out of the hub insertion portion due to the relative rotational force between the wheel and the hub dynamo.

According to the fifth aspect of the present invention, in the wheel with the hub dynamo according to the fourth aspect of the present invention, when the wheel rotates in the direction in which the vehicle body moves forward, the wheel and the hub dynamo The concave portion and the convex portion may be inclined in a direction in which the hub dynamo is displaced to the other side in the central axis direction with respect to the hub insertion portion due to a relative rotational force generated in the above.

According to such a configuration, when the wheel rotates in the direction in which the vehicle body moves forward, the hub dynamo is prevented from rotating in the direction in which the hub dynamo is removed from the hub insertion portion due to the relative rotational force generated between the wheel and the hub dynamo. be able to.

According to a sixth aspect of the present invention, in the wheel with a hub dynamo according to any one of the first to fifth aspects of the present invention, the outer diameter of the hub shell is the inner diameter of the hub insertion portion. It may be smaller than the dimension.

According to such a configuration, the hub shell of the hub dynamo can be inserted into and removed from the hub insertion portion without being press-fitted into the hub insertion portion. As a result, the hub dynamo can be easily attached to and detached from the hub insertion portion.

According to a seventh aspect of the present invention, in the wheel with a hub dynamo according to any one of the first to sixth aspects of the present invention, the hub insertion portion serves as the positioning portion, and the hub You may have an abutting surface which a part of said hub shell inserted in the insertion part abuts.

According to such a configuration, when the hub dynamo is mounted on the wheel, the hub dynamo is inserted into the hub insertion portion, and if a part of the hub shell abuts against the abutting surface of the hub insertion portion, the center axis of the hub shell hub axis is obtained. The position in the direction can be easily defined.

According to an eighth aspect of the present invention, in the wheel with the hub dynamo according to the seventh aspect of the present invention, the hub shell extends radially outward on one side in the central axis direction, and the hub insertion portion You may have a flange part which contacts the said contact surface.

According to such a configuration, the position of the hub shell in the central axis direction of the hub shaft can be easily defined by abutting the flange portion provided on the hub shell against the abutting surface of the hub insertion portion.

According to a ninth aspect of the present invention, in the wheel with the hub dynamo according to any one of the first to eighth aspects of the present invention, the restraint portion includes the hub shell, the hub insertion portion, May be bolted to fasten and fix from one side in the central axis direction.

According to such a configuration, the hub shell of the hub dynamo inserted into the hub insertion portion can be fixed by tightening the bolt from one side in the central axis direction of the hub shaft. The operation of inserting / removing the hub dynamo with respect to the hub insertion portion is also performed from one side in the central axis direction of the hub shaft. For this reason, the hub shell insertion / extraction operation and the bolt tightening operation with respect to the hub insertion portion can be performed from the same side in the central axis direction with respect to the hub insertion portion, and the workability is excellent.

According to a tenth aspect of the present invention, in the wheel with a hub dynamo according to the ninth aspect of the present invention, the bolt is either between the recesses adjacent in the circumferential direction or between the protrusions. You may arrange | position between.

According to such a configuration, the space between the concave portions and the convex portions can be effectively used as a space for fastening and fixing. Compared with the case where the concave portion or the convex portion and the bolt are arranged in the radial direction, the position of the bolt can be moved inward in the radial direction, so that the wheel with the hub dynamo can be reduced in size.

According to an eleventh aspect of the present invention, in the wheel with the hub dynamo according to any one of the first aspect to the tenth aspect of the present invention, the hub dynamo is configured to move the vehicle body in the central axis direction. It may be inserted into and removed from the hub insertion portion from the same side as the side on which the headlamp provided on is provided.

According to a twelfth aspect of the present invention, in the wheel with the hub dynamo according to the eleventh aspect of the present invention, the hub dynamo includes an output terminal that outputs electric power generated with the rotation of the wheel to the outside. The output terminal may be provided on the same side as the side on which the headlamp provided on the vehicle body is provided in the central axis direction.

According to such a configuration, the operation of connecting the connection wiring for connecting the output terminal and the headlamp to the output terminal and the headlamp is the same in the central axis direction of the hub axle with respect to the vehicle body. It can be done from the side and has excellent workability.

According to a thirteenth aspect of the present invention, in the wheel with the hub dynamo according to any one of the first to twelfth aspects of the present invention, the hub insertion portion and the hub shell of the hub dynamo are It is made of a resin material.

According to such a configuration, the expansion coefficient between the hub insertion portion and the hub shell becomes close, and it is possible to prevent the hub shell from being easily inserted into and removed from the hub insertion portion due to a temperature change or the like.

According to the fourteenth aspect of the present invention, the hub dynamo is a hub dynamo provided at the center portion of a wheel rotatably provided on the vehicle body, and is a cylindrical hub insertion portion provided at the center portion of the wheel. On the other hand, a hub shell that can be inserted and removed along the central axis direction of the hub insertion portion, a rotor having a permanent magnet provided on an inner peripheral portion of the hub shell, and a radially inner side with respect to the permanent magnet, A stator having a coil for outputting an alternating current by rotation of the rotor; and an outer peripheral surface of the hub shell, and engaged with a wheel side engaged portion formed on an inner peripheral surface of the hub insertion portion, A hub-side engagement portion that engages the hub shell with the hub insertion portion so as not to rotate in the circumferential direction around the central axis.

According to such a configuration, since the hub dynamo can be inserted into and removed from the hub insertion portion along the center axis direction of the hub shaft, it is not necessary to press-fit the hub dynamo into the hub insertion portion. Therefore, the hub dynamo can be easily attached to and detached from the wheel. Thereby, when exchanging a wheel or a tire, it is not necessary to exchange a hub dynamo at the same time, and a hub dynamo removed from a wheel to be exchanged may be attached to a newly attached wheel. In this way, the configuration for press-fitting the hub dynamo into the wheel can be eliminated, and the maintenance cost can be reduced. Therefore, it is possible to employ a hub dynamo even when the wheel is made of resin.

According to a fifteenth aspect of the present invention, a method for assembling a wheel with a hub dynamo is a method for assembling a wheel with a hub dynamo according to any one of the first to fourteenth aspects of the present invention. The convex portion provided on one of the inner peripheral surface of the hub insertion portion and the outer peripheral surface of the hub dynamo and the inner peripheral surface of the hub insertion portion with respect to the cylindrical hub insertion portion provided in the center of the wheel And a step of inserting a hub dynamo from one side in the rotational axis direction of the wheel while engaging a recess provided on the other outer peripheral surface of the hub dynamo, and a diameter provided on the hub shell of the hub dynamo. A step of abutting a flange portion extending outward in the direction from the rotational axis direction against a contact surface provided in the hub insertion portion, and a contact surface of the flange portion of the hub dynamo and the hub insertion portion The and a step of fastening at the fastening bolts.

According to such a configuration, the hub dynamo can be easily attached to and detached from the wheel. Thereby, when exchanging a wheel or a tire, it is not necessary to exchange a hub dynamo at the same time, and a hub dynamo removed from a wheel to be exchanged may be attached to a newly attached wheel. In this way, it is possible to provide a wheel with a hub dynamo that can eliminate the configuration for press-fitting the hub dynamo into the wheel and reduce maintenance costs.

According to the wheel with the hub dynamo described above, the configuration in which the hub dynamo is press-fitted into the wheel can be eliminated, and the maintenance cost can be reduced.

It is a perspective view showing the appearance of the bicycle using the hub dynamo wheel and hub dynamo in the 1st embodiment of the present invention. It is sectional drawing which shows the structure of the principal part of the wheel with a hub dynamo in the 1st Embodiment of this invention. It is sectional drawing which shows the hub insertion part which accommodates the hub dynamo in the 1st Embodiment of this invention. It is a side view which shows the external appearance of the hub dynamo in the 1st Embodiment of this invention. It is the side view which looked at the hub dynamo in the 1st embodiment of the present invention from one side of the central axis direction of a hub axis. It is a flowchart which shows the flow of the assembly method of the wheel with a hub dynamo in the 1st Embodiment of this invention. It is a front view which shows the external appearance of the hub dynamo in the 2nd Embodiment of this invention.

Next, a wheel with a hub dynamo, a hub dynamo, and a method for assembling a wheel with a hub dynamo according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view showing the outer appearance of a wheel using a hub dynamo and a bicycle using the hub dynamo in the first embodiment of the present invention.

As shown in FIG. 1, the bicycle 1 mainly includes a vehicle body 2, a front wheel 3 provided at the front portion of the vehicle body 2, and a rear wheel 4 provided at the rear portion of the vehicle body 2. In the following description, the side facing forward in the traveling direction of the bicycle 1 is referred to as “front”, the opposite side to the traveling direction is referred to as “rear”, the right side in the traveling direction is referred to as “right side”, and the opposite side is referred to as “left side”.
The vehicle body 2 includes a shaft support portion 2a that supports the front wheel 3 so as to be rotatable around a predetermined steering shaft, a main frame 2b that extends obliquely downward from the shaft support portion 2a, and a rear end portion of the main frame 2b. And a pair of sub-frames 2d and 2e extending backward from the upper and lower ends of the seat post 2c.

The front wheel 3 is rotatably supported by the front fork 6. The front fork 6 includes a steering shaft 6a that is rotatably supported by the shaft support portion 2a of the vehicle body 2, and a pair of fork arms that bifurcate from the lower end of the steering shaft 6a to rotatably support the front wheel 3. 6b. A handle 8 for steering the front wheels is provided on the steering shaft 6a.

The rear wheel 4 is rotatably provided at the rear ends of the subframes 2d and 2e of the vehicle body 2. The rear wheel 4 is rotationally driven by the rotation of the pedal 9 provided on the vehicle body 2 being transmitted through the chain drive mechanism 9d.

A headlamp 7 is provided at the front of such a bicycle 1. The headlamp 7 is provided on the right side in the traveling direction of the vehicle body 2.

FIG. 2 is a cross-sectional view showing the configuration of the main part of the wheel with the hub dynamo in the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing a hub insertion portion that accommodates the hub dynamo in the first embodiment of the present invention. FIG. 4 is a side view showing the appearance of the hub dynamo in the first embodiment of the present invention. FIG. 5 is a side view of the hub dynamo according to the first embodiment of the present invention viewed from one side in the central axis direction of the hub shaft.

As shown in FIGS. 1 and 2, the front wheel 3 is configured by a wheel 10 with a hub dynamo as shown below.
The wheel with hub dynamo 10 includes a wheel 11, a tire 12 provided on the outer periphery of the wheel 11, and a hub dynamo 20 provided at the center of the wheel 11.
The wheel 11 is made of resin and has an annular rim 13 on which the tire 12 is mounted, a hub insertion portion 15 provided at the center of the rim 13, and a plurality of spokes that connect the rim 13 and the hub insertion portion 15. 14 are integrally provided.

As shown in FIG. 2, the hub insertion portion 15 extends in the width direction connecting the right and left sides of the vehicle body 2 and penetrates both sides of the wheel 11 in the width direction, and the hub dynamo 20 is accommodated inside the hub insertion portion 15. The hub insertion portion 15 includes a cylindrical inner peripheral surface 15f, a diameter-enlarged portion 15a provided on one side P in the central axis O direction of the hub insertion portion 15 with respect to the inner peripheral surface 15f, and an inner peripheral surface 15f. On the other hand, it has a reduced diameter portion 15b provided on the other Q side in the central axis O direction.

The inner peripheral surface 15f is formed with a constant inner diameter over a predetermined length in the central axis O direction. The enlarged diameter portion 15a is set to have a larger inner diameter than the inner peripheral surface 15f. Between the enlarged diameter portion 15a and the inner peripheral surface 15f, an orthogonal surface that intersects the central axis O is formed as an abutting surface 17A. The inner diameter of the reduced diameter portion 15b is set smaller than that of the inner peripheral surface 15f. Between the reduced diameter portion 15b and the inner peripheral surface 15f, an orthogonal surface that intersects the central axis O is formed as a contact surface 17B.

2 and 3, a groove-like recess (wheel-side engaged portion) 18 extending in the direction of the central axis O is formed on the inner peripheral surface 15f of the hub insertion portion 15 as described above. The recess 18 is recessed from the inner peripheral surface 15f of the hub insertion portion 15 toward the radially outer side. A plurality of recesses 18 are provided at equal intervals in the circumferential direction around the central axis O. Each recess 18 opens to the abutting surface 17A on one P side (right side) in the central axis O direction.

As shown in FIG. 2, the hub dynamo 20 is provided in the hub insertion portion 15 at the center of the wheel 11 and generates electric power as the wheel 11 rotates. In the present embodiment, the electric power generated by the hub dynamo 20 is used for lighting the headlamp 7.
The hub dynamo 20 includes a hub shell 21 that forms an outer shell of the hub dynamo 20, a rotor 22 provided on the inner peripheral portion of the hub shell 21, a stator 23 provided on the radially inner side of the rotor 22, a hub shaft 25, It has.

The hub shell 21 is made of a resin material and is integrally formed in a substantially bottomed cylindrical shape. The cylindrical shell 21a, the end plate 21b on the other Q side in the central axis O direction of the barrel 21a, and the center of the barrel 21a. And an end plate 21c that closes the opening on the one P side in the axis O direction. The end plate 21c is press-fitted and fixed to the body portion 21a.

2, 4, and 5, the outer peripheral surface 21 f of the hub shell 21 is formed with a convex portion (hub side engaging portion) 28 extending in the direction of the central axis O. The convex portion 28 protrudes radially outward from the outer peripheral surface 21 f of the hub shell 21. The same number of the convex portions 28 as the concave portions 18 are provided at equal intervals in the circumferential direction around the central axis O.

On one side P in the direction of the central axis O of the body portion 21a of the hub shell 21, a flange portion 27 is formed that projects outward in the radial direction. Each flange portion 27 is formed with a plurality of insertion holes 27h (see FIG. 2) penetrating in the direction of the central axis O. Each insertion hole 27h is disposed between the convex portions 28 adjacent in the circumferential direction and at equal intervals in the circumferential direction.
Here, the outer diameter of the outer peripheral surface 21 f of the body portion 21 a of the hub shell 21 is smaller than the inner diameter of the inner peripheral surface 15 f of the hub insertion portion 15. The outer diameter dimension at the tip of the convex portion 28 provided in the hub shell 21 is smaller than the inner diameter dimension at the bottom portion of the concave portion 18 formed on the inner peripheral surface 15 f of the hub insertion portion 15.

As shown in FIG. 2, outer rings of bearings 24A and 24B are fitted to the center portions of the end plate 21b and the end plate 21c, respectively. A hub shaft 25 extending in the direction of the central axis O is fitted to the inner rings of the bearings 24A and 24B. Both ends of the hub shaft 25 in the direction of the central axis O protrude from the hub shell 21 to both sides in the direction of the central axis O, and are fixed to the front fork 6 (see FIG. 1) of the vehicle body 2 by nuts (not shown).
As described above, the hub shell 21 is rotatably supported by the hub shaft 25 via the bearings 24 </ b> A and 24 </ b> B, and thus rotates around the central axis O of the hub shaft 25 together with the rotation of the front wheel 3. That is, the hub dynamo 20 functions as a hub that rotatably supports the front wheel 3.

The rotor 22 includes a cylindrical ring yoke 22y and a permanent magnet 22m. The ring yoke 22y is made of a magnetic metal material (for example, iron) and is provided on the inner periphery of the body portion 21a of the hub shell 21. The permanent magnet 22m is formed of, for example, ferrite, and is attached to the inner periphery of the ring yoke 22y with an adhesive or the like. The permanent magnet 22m is incorporated in the inner periphery of the body portion 21a of the hub shell 21 in a state of being divided into a plurality of portions in the circumferential direction. On the inner peripheral surface of the cylindrically arranged permanent magnet 22m, N-pole and S-pole magnetic poles are alternately magnetized along the circumferential direction at equal intervals.

The stator 23 is provided on the radially inner side with respect to the permanent magnet 22m. The stator 23 is attached to the outer periphery of the hub shaft 25. The stator 23 is positioned and fixed to the hub shaft 25 by a sleeve nut 33 and a tightening nut 34 via plate members 31 and 32 disposed at both ends of the central axis O direction.

The inner ring of one bearing 24A is fitted to the outer periphery of the sleeve nut 33 arranged on the one P side in the central axis O direction. Another sleeve nut 35 is disposed on the other Q side of the hub shaft 25 in the direction of the central axis O, and the inner ring of the other bearing 24B is fitted to the outer periphery of the sleeve nut 35.

A cover 36 is provided on the outer side of the bearing 24B in the central axis O direction, and a nut 37 is disposed on the inner periphery of the cover 36. When the nut 37 is screwed to the hub shaft 25, the cover 36 is fixed to the hub shaft 25, and the other end side of the hub shell 21 is rotatably supported by the hub shaft 25 via a bearing 24B.

A connector plate 38 provided with an output terminal 29 is provided outside the bearing 24A in the central axis O direction, and a nut 39 is disposed outside the connector plate 38 in the central axis O direction. When the nut 39 is screwed onto the hub shaft 25, the connector plate 38 is fixed to the hub shaft 25, and one end side of the hub shell 21 is rotatably supported on the hub shaft 25 via a bearing 24A.
Here, the connector plate 38 provided with the output terminal 29 is the same side as the side where the headlamp 7 provided in the vehicle body 2 is provided in the central axis O direction, that is, one P side in the central axis O direction. Is provided.

The stator 23 surrounds the cylindrical coil bobbin 23a made of a synthetic resin (made of non-magnetic material) through which the hub shaft 25 is inserted, a ring-shaped coil 23c wound around the coil bobbin 23a, and the coil 23c. And an assembled claw pole type stator core 23s. The outer peripheral portion of the stator core 23s is configured to face the inner peripheral surface of the permanent magnet 22m in the radial direction with a slight gap (air gap) therebetween. The coil 23 c outputs an alternating current by the interaction with the permanent magnet 22 m that rotates around the central axis O integrally with the rotor 22. A wiring (not shown) is connected to the coil 23 c, and the wiring is pulled out along the hub shaft 25 and connected to an output terminal 29 provided on the connector plate 38.

Such a hub dynamo 20 is assembled to the hub insertion portion 15 of the wheel 11 as follows.
The hub dynamo 20 is attached to and detached from the hub insertion portion 15 from one side P in the central axis O direction. The hub dynamo 20 is inserted into and removed from the hub insertion portion 15 from the same side (one P side in the central axis O direction) as the side where the headlamp 7 provided in the vehicle body 2 is provided in the central axis O direction. The The hub dynamo 20 is inserted into the hub insertion portion 15 by engaging the convex portion 28 formed on the outer peripheral surface 21 f of the hub shell 21 with the concave portion 18 formed on the inner peripheral surface 15 f of the hub insertion portion 15.
By engaging the concave portion 18 and the convex portion 28, the hub insertion portion 15 and the hub shell 21 are engaged so as not to rotate in the circumferential direction around the central axis O. The concave portion 18 and the convex portion 28 constitute a circumferential engagement portion 41 that engages the hub insertion portion 15 and the hub shell 21 in a circumferential direction around the central axis O so as not to rotate.

The hub dynamo 20 has a central axis of the hub shaft 25 of the hub shell 21 inserted into the hub insertion portion 15 by a flange portion 27 provided on one side P in the central axis O direction of the hub shell 21 abutting against the abutting surface 17A. A position in the O direction is defined.
In the hub dynamo 20, the end plate 21 b of the hub shell 21 abuts against the abutting surface 17 </ b> B of the hub insertion portion 15, whereby the position of the hub shell 21 inserted into the hub insertion portion 15 in the direction of the central axis O of the hub shaft 25 is defined. The The flange portion 27 and the abutting surface 17A, the end plate 21b, and the abutting surface 17B constitute a positioning portion 42 that defines the position of the hub shell 21 inserted in the hub insertion portion 15 in the direction of the central axis O of the hub shaft 25. Is done.

The hub shell 21 and the hub insertion portion 15 are fastened by bolts 101 and 102. The bolt (fastening bolt) 101 fastens and fixes the flange portion 27 of the hub shell 21 and the abutting surface 17A of the hub insertion portion 15 from one P side in the central axis O direction. The bolt 102 fastens and fixes the end plate 21b of the hub shell 21 and the hub insertion portion 15 from the other Q side in the central axis O direction. The bolts 101 and 102 restrain the hub shell 21 inserted into the hub insertion portion 15 from moving in the direction of the central axis O. Such bolts 101 and 102 constitute a restraining portion 43 that restrains the hub shell 21 inserted into the hub insertion portion 15 from moving in the direction of the central axis O.

The output terminal 29 provided on the connector plate 38 of the hub shell 21 and the headlamp 7 (see FIG. 1) are connected by connection wiring (not shown).

In such a wheel 10 with a hub dynamo and a hub dynamo 20, when the wheel 11 rotates around the central axis O as the bicycle 1 travels, the rotor 22 of the hub dynamo 20 rotates together with the wheel 11 together with the hub shell 21. Then, the coil 23c of the stator 23 outputs an alternating current by the interaction with the permanent magnet 22m that rotates around the central axis O integrally with the rotor 22. The alternating current output from the coil 23c is supplied to the headlamp 7 via the output terminal 29 and connection wiring (not shown), and the headlamp 7 is turned on.

Next, a method for assembling the wheel with hub dynamo 10 as described above will be described.
FIG. 6 is a flowchart showing the flow of the method for assembling the wheel with the hub dynamo in the first embodiment of the present invention.
As shown in FIG. 6, in order to assemble the wheel 10 with the hub dynamo, first, the hub dynamo 20 is inserted into the hub insertion part 15 (step S1). For this purpose, a convex portion 28 provided on the outer peripheral surface 21 f of the hub dynamo 20 and an inner peripheral surface 15 f of the hub insertion portion 15 are provided with respect to the cylindrical hub insertion portion 15 provided at the center of the wheel 11. The hub dynamo 20 is inserted into the hub insertion portion 15 from one side in the direction of the central axis O (rotation axis) of the wheel 11 while engaging with the recessed portion 18 formed. At this time, the outer diameter of the outer peripheral surface 21 f of the body portion 21 a of the hub shell 21 is smaller than the inner diameter of the inner peripheral surface 15 f of the hub insertion portion 15. The outer diameter dimension at the tip of the convex portion 28 provided in the hub shell 21 is smaller than the inner diameter dimension at the bottom portion of the concave portion 18 formed on the inner peripheral surface 15 f of the hub insertion portion 15. Therefore, the hub dynamo 20 is easily inserted into the hub insertion portion 15 while engaging the convex portion 28 and the concave portion 18.

Next, the flange portion 27 of the hub dynamo 20 is abutted against the abutting surface 17A provided in the hub insertion portion 15 from the direction of the central axis O (step S2). At this time, at the same time as the flange portion 27 abuts against the abutting surface 17A, the end plate 21b of the hub shell 21 of the hub dynamo 20 abuts against the abutting surface 17B. As a result, the position of the hub dynamo 20 inserted in the hub insertion portion 15 in the direction of the central axis O is defined.

Thereafter, the hub dynamo 20 and the hub insertion portion 15 are fastened with the bolts 101 and 102 (step S3). For this, from the one P side in the direction of the central axis O, the bolt 101 is passed through the insertion hole 27h formed in the flange portion 27 of the hub shell 21, and the female screw hole (illustrated) formed in the abutting surface 17A of the hub insertion portion 15. No). Further, from the other Q side in the central axis O direction, the bolt 102 is fastened to a female screw hole (not shown) formed in the end plate 21 b of the hub shell 21 through the reduced diameter portion 15 b of the hub insertion portion 15. As a result, the hub shell 21 inserted into the hub insertion portion 15 is restrained from moving in the direction of the central axis O.

When removing the hub dynamo 20 from the hub insertion portion 15, the above series of operations may be performed in the reverse order. That is, after the bolts 101 and 102 are loosened and removed, the hub dynamo 20 is moved from the hub insertion portion 15 to one side P in the central axis O direction and extracted.

As described above, the wheel 10 with the hub dynamo is provided with the wheel 11 that is rotatably provided around the hub shaft 25 that is fixed to the vehicle body 2, and is provided at the center of the wheel 11. A hub dynamo 20 for generating Furthermore, the wheel 10 with the hub dynamo is provided on the wheel 11 and accommodates the hub dynamo 20. The hub dynamo 20 can be inserted / removed only from one side P of the hub shaft 25 in the central axis O direction. And a recess 18 formed on the inner peripheral surface 15 f of the hub insertion portion 15, and a convex portion 28 formed on the outer peripheral surface 21 f of the hub shell 21. In addition, a circumferential engagement portion 41 that engages the hub insertion portion 15 and the hub shell 21 in the circumferential direction around the hub shaft 25 so as to be non-rotatable by the engagement of the concave portion 18 and the convex portion 28, and the hub insertion portion 15. The positioning portion 42 that defines the position of the hub shell 21 inserted in the center shaft O direction of the hub shaft 25 and the hub shell 21 inserted in the hub insertion portion 15 are restrained from moving to the other Q side in the center axis O direction. And a restraining portion 43 to be provided.

According to such a configuration, the hub dynamo 20 is inserted into the hub insertion portion 15 provided in the wheel 11, and the hub insertion portion 15 and the hub shell 21 of the hub dynamo 20 are engaged by the circumferential engagement portion 41. Thus, the hub insertion portion 15 and the hub shell 21 of the hub dynamo 20 can be engaged in the circumferential direction so as not to rotate. With the positioning part 42 defining the position of the hub shell 21 inserted in the hub insertion part 15 in the direction of the central axis O, the restraint part 43 moves the hub shell 21 in the hub insertion part 15 in the direction of the central axis O. By restraining, the hub dynamo 20 can be fixedly attached to the hub insertion portion 15 of the wheel 11.

Since the hub dynamo 20 can be inserted into and removed from the hub insertion portion 15 from one side in the direction of the central axis O of the hub shaft 25, it is not necessary to press-fit the hub dynamo 20 into the hub insertion portion 15. Therefore, the hub dynamo 20 can be easily attached to and detached from the wheel 11. Thereby, when exchanging the wheel 11 and the tire 12, it is not necessary to replace the hub dynamo 20 at the same time, and the hub dynamo 20 removed from the wheel 11 to be replaced may be mounted on the newly mounted wheel 11. . In this way, the configuration for press-fitting the hub dynamo 20 into the wheel 11 can be eliminated, and the maintenance cost can be reduced. Therefore, even if the wheel 11 is made of resin, the hub dynamo 20 can be employed.

A plurality of sets of concave portions 18 and convex portions 28 are provided at equal intervals in the circumferential direction around the hub shaft 25. According to such a configuration, when the hub dynamo 20 is inserted and attached to the hub insertion portion 15, the circumferential direction of the hub dynamo 20 with respect to the hub insertion portion 15 is not limited. On the other hand, when the concave portion 18 and the convex portion 28 are provided at unequal intervals in the circumferential direction around the hub shaft 25 or when only one set is provided in the circumferential direction, the hub dynamo 20 is inserted into the hub insertion portion 15. Thus, when mounting, it is necessary to adjust the orientation of the hub dynamo 20 in the circumferential direction with respect to the hub insertion portion 15 so that the concave portion 18 and the convex portion 28 are engaged. In this way, according to the configuration of the present embodiment, the hub dynamo 20 can be easily assembled to the hub insertion portion 15.

The concave portion 18 and the convex portion 28 extend along the direction of the central axis O of the hub shaft 25. According to such a configuration, the hub dynamo 20 is moved with respect to the hub insertion portion 15 by moving the hub dynamo 20 in the direction of the central axis O of the hub shaft 25 along the concave portion 18 and the convex portion 28 that are engaged with each other. Can be removed. Since the concave portion 18 and the convex portion 28 that are engaged with each other in a state where the hub dynamo 20 is attached to the hub insertion portion 15 extend perpendicular to the rotation direction of the wheel 11, the hub insertion portion 15 and the hub shell 21 of the hub dynamo 20 are included. Are firmly engaged in the circumferential direction around the central axis O of the hub shaft 25.

The outer diameter dimension of the hub shell 21 is smaller than the inner diameter dimension of the hub insertion portion 15. According to such a configuration, the hub shell 21 of the hub dynamo 20 can be inserted into and removed from the hub insertion portion 15 without being press-fitted into the hub insertion portion 15. As a result, the hub dynamo 20 can be easily attached to and detached from the hub insertion portion 15.

The hub insertion part 15 has a contact surface 17A as a positioning part 42 against which a part of the hub shell 21 inserted into the hub insertion part 15 abuts. According to such a configuration, when the hub dynamo 20 is mounted on the wheel 11, the hub dynamo 20 is inserted into the hub insertion portion 15, and a part of the hub shell 21 is abutted against the abutting surface 17 </ b> A of the hub insertion portion 15. The position of the hub shell 21 in the central axis O direction of the hub shaft 25 can be easily defined.

The hub shell 21 has a flange portion 27 that extends radially outward on one side P in the central axis O direction and abuts against the abutting surface 17A of the hub insertion portion 15. According to such a configuration, if the flange portion 27 provided on the hub shell 21 is abutted against the abutting surface 17A of the hub insertion portion 15, the position of the hub shell 21 in the direction of the central axis O of the hub shaft 25 can be easily defined. Can do.

The restraining portion 43 has a bolt 101 that fastens and fixes the hub shell 21 and the hub insertion portion 15 from one P side in the central axis O direction. According to such a configuration, the hub shell 21 of the hub dynamo 20 inserted into the hub insertion portion 15 can be fixed by tightening the bolt 101 from one side of the hub shaft 25 in the direction of the central axis O. The hub dynamo 20 is inserted into and removed from the hub insertion portion 15 from one side of the hub shaft 25 in the direction of the central axis O. For this reason, the hub shell 21 insertion / extraction operation and the bolt 101 tightening operation with respect to the hub insertion portion 15 can be performed from the same side of the hub insertion portion 15 in the direction of the central axis O, which is excellent in workability.

The hub dynamo 20 is inserted into and removed from the hub insertion portion 15 from the same side as the side where the headlamp 7 provided in the vehicle body 2 is provided in the central axis O direction. Further, the hub dynamo 20 includes an output terminal 29 for outputting electric power generated with the rotation of the wheel 11 to the outside. The output terminal 29 is connected to the headlamp 7 provided on the vehicle body 2 in the central axis O direction. It is provided on the same side as the provided side. According to such a configuration, the operation of connecting the connection wiring (not shown) for connecting the output terminal 29 and the headlamp 7 to each of the output terminal 29 and the headlamp 7 is performed with respect to the vehicle body 2 as a hub. It can be performed from the same side of the shaft 25 in the direction of the central axis O, and is excellent in workability.

The hub insertion portion 15 and the hub shell 21 of the hub dynamo 20 are formed of a resin material. According to such a configuration, since the expansion coefficient between the hub insertion portion 15 and the hub shell 21 is close, it is possible to prevent the hub shell 21 from being difficult to insert and remove from the hub insertion portion 15 due to a temperature change or the like.

The hub dynamo 20 as described above is a hub dynamo 20 provided at the center portion of the wheel 11 that is rotatably provided on the vehicle body 2, and has a cylindrical hub insertion portion 15 provided at the center portion of the wheel 11. A hub shell 21 that can be inserted and removed along the direction of the central axis O of the hub insertion portion 15 is provided. Further, a rotor 22 provided on the inner peripheral portion of the hub shell 21 and having a permanent magnet 22m, and a stator 23 having a coil that is provided radially inward of the permanent magnet 22m and outputs an alternating current by the rotation of the rotor 22. And is formed on the outer peripheral surface 21f of the hub shell 21 and engages with a recess 18 (wheel side engaged portion) formed on the inner peripheral surface 15f of the hub insertion portion 15, so that the hub shell 21 is engaged with the hub insertion portion 15. And a convex portion 28 (hub side engaging portion) that engages in a circumferential direction around the hub shaft 25 so as not to rotate.

According to such a configuration, the hub dynamo 20 can be inserted / removed along the direction of the center axis O of the hub shaft 25 with respect to the hub insertion portion 15, so that it is necessary to press-fit the hub dynamo 20 into the hub insertion portion 15. No. Therefore, the hub dynamo 20 can be easily attached to and detached from the wheel 11. Thereby, when exchanging the wheel 11 and the tire 12, it is not necessary to replace the hub dynamo 20 at the same time, and the hub dynamo 20 removed from the wheel 11 to be replaced may be mounted on the newly mounted wheel 11. . In this way, the configuration for press-fitting the hub dynamo 20 into the wheel 11 can be eliminated, and the maintenance cost can be reduced. Therefore, even if the wheel 11 is made of resin, the hub dynamo 20 can be employed.

In the hub dynamo 20 as described above, a plurality of insertion holes 27h are formed between the convex portions 28 adjacent to each other in the circumferential direction of each flange portion 27 and at equal intervals in the circumferential direction. The hub dynamo 20 and the hub insertion portion 15 are fastened and fixed through the bolt 101 through the insertion hole 27h.
According to such a configuration, the space between the convex portions 28 adjacent in the circumferential direction of the bolt 101 can be effectively utilized as a space for fastening and fixing between the convex portions 28. Compared with the case where the convex portion 28 and the bolt 101 are arranged in the radial direction, the position of the bolt 101 (insertion hole 27h) can be moved radially inward, and accordingly, the flange portion 27 can be reduced in diameter, The hub dynamo 20 can be reduced in size.

In the method of assembling the wheel 10 with the hub dynamo as described above, the protrusion 28 provided on the outer peripheral surface 21f of the hub dynamo 20 and the hub are inserted into the cylindrical hub insert 15 provided in the center of the wheel 11. Step S1 of inserting the hub dynamo 20 from one side in the direction of the central axis O (rotation axis) of the wheel 11 while engaging the recess 18 provided on the inner peripheral surface 15f of the portion 15, and the hub dynamo 20 Step S2 in which the flange portion 27 provided on the hub shell 21 and extending outward in the radial direction is abutted from the center axis O direction against the abutting surface 17A provided on the hub insertion portion 15, the hub dynamo 20 and the hub insertion portion 15; And a step S3 of fastening the bolt with the bolt 101.
According to such a configuration, it is possible to provide the wheel 10 with the hub dynamo that can eliminate the configuration of press-fitting the hub dynamo 20 into the wheel 11 and can reduce the maintenance cost.

(Second Embodiment)
Next, a second embodiment of a wheel with a hub dynamo, a hub dynamo, and a method for assembling a wheel with a hub dynamo according to the present invention will be described. In the second embodiment described below, the same reference numerals are used in the drawings for the configurations common to the first embodiment, and the description thereof is omitted.
FIG. 7 is a front view showing the appearance of the hub dynamo in the second embodiment of the present invention.

As shown in FIG. 7, in the present embodiment, the hub dynamo 20B provided on the wheel 10B with the hub dynamo is provided with a convex portion (hub side engaging portion) 28B on the outer peripheral surface 21f of the hub shell 21. The protrusion 28B protrudes radially outward from the outer peripheral surface 21f of the hub shell 21 in the same manner as the protrusion 28 of the first embodiment. The same number of convex portions 28B as the concave portions (wheel side engaged portions) 18B (see FIG. 2) formed on the inner peripheral surface 15f of the hub insertion portion 15 are provided at equal intervals in the circumferential direction around the central axis O. It has been. Each convex portion 28B has a skew structure extending obliquely with respect to the central axis O from one P side in the central axis O direction of the hub shaft 25 toward the other Q side. Further, the recess 18B formed on the inner peripheral surface 15f of the hub insertion portion 15 and engaged with the projection 28B extends in an inclined manner with respect to the central axis O, similarly to the projection 28B.

When the wheel 11 rotates in the direction in which the vehicle body 2 moves forward, the concave portion 18B and the convex portion 28B cause the hub dynamo 20B to move against the hub insertion portion 15 by the relative rotational force generated between the wheel 11 and the hub dynamo 20B. It inclines in the direction displaced to the other Q side of the central axis O direction. In the case of the present embodiment, the concave portion 18B and the convex portion 28B are twisted in the direction opposite to the rotation direction of the wheel 11 when the vehicle body 2 moves forward from the one P side in the central axis O direction toward the other Q side. It is inclined to.

Thus, in the wheel 10B with the hub dynamo described above, the concave portion 18B and the convex portion 28B are inclined with respect to the central axis O from one P side to the other Q side in the central axis O direction of the hub shaft 25. It extends. According to such a configuration, the hub insertion portion 15 and the hub shell 21 of the hub dynamo 20 can be engaged around the hub shaft 25 in a non-rotatable manner by engaging the concave portion 18B and the convex portion 28B with each other. The concave portion 18B and the convex portion 28B have a skew structure inclined with respect to the central axis O of the hub shaft 25. Thereby, when the wheel 11 rotates in a specific direction, it is possible to prevent the hub dynamo 20 from rotating in the direction in which the hub dynamo 20 comes out of the hub insertion portion 15 due to the relative rotational force between the wheel 11 and the hub dynamo 20.

In the present embodiment, when the wheel 11 rotates in the direction in which the vehicle body 2 moves forward, the hub dynamo 20 is centered with respect to the hub insertion portion 15 by the relative rotational force generated between the wheel 11 and the hub dynamo 20. The concave portion 18B and the convex portion 28B are inclined in the direction of displacement to the other side in the O direction. According to such a configuration, when the wheel 11 rotates in the direction in which the vehicle body 2 moves forward, the direction in which the hub dynamo 20 is removed from the hub insertion portion 15 due to the relative rotational force generated between the wheel 11 and the hub dynamo 20. Can be prevented from rotating.

Also in such a wheel 10B with a hub dynamo, the configuration in which the hub dynamo 20 is press-fitted into the wheel 11 can be eliminated as in the first embodiment, and the maintenance cost can be reduced. Therefore, even if the wheel 11 is made of resin, the hub dynamo 20 can be employed.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and includes various modifications made to the above-described embodiments without departing from the spirit of the present invention.
For example, in the above embodiment, the concave portion 18 is formed on the inner peripheral surface 15f of the hub insertion portion 15 and the convex portion 28 is formed on the outer peripheral surface 21f of the hub shell 21, but this is not restrictive. The convex portion 28 may be formed on the inner peripheral surface 15 f of the hub insertion portion 15, and the concave portion 18 may be formed on the outer peripheral surface 21 f of the hub shell 21.

In the above embodiment, the restraining portion 103 is configured to fasten and fix the hub dynamo 20 to the hub insertion portion 15 with the bolt 101 and the bolt 102, but is not limited thereto. For example, the fastening with the bolt 102 can be omitted.

In the above-described embodiment, the positioning portion 42 causes the flange portion 27 of the hub dynamo 20 and the end plate 21b of the hub shell 21 to abut against the abutting surfaces 17A and 17B of the hub insertion portion 15, so that the central axis of the hub dynamo 20 Although the position in the O direction is defined, the present invention is not limited to this. The position of the hub dynamo 20 in the direction of the central axis O may be defined by abutting only one of the flange portion 27 and the abutting surface 17A and the end plate 21b and the abutting surface 17B.

The internal configuration of the hub dynamo 20 and 20B, such as the rotor 22 and the stator 23, may be changed as appropriate.
The supply destination of the electric power generated by the hub dynamo 20 is not limited to the headlamp 7 and may be used for other purposes.

In the said embodiment, although the wheel 10 and 10B with a hub dynamo was applied to the bicycle 1, it is not restricted to this. The hub dynamo-equipped wheels 10 and 10B similar to the above can be applied to wheels of other vehicles such as a tricycle, a wheelchair, and a wheelbarrow other than the bicycle 1.
In addition to this, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate without departing from the gist of the present invention.

According to the wheel with the hub dynamo described above, the configuration in which the hub dynamo is press-fitted into the wheel can be eliminated, and the maintenance cost can be reduced.

DESCRIPTION OF SYMBOLS 1 ... Bicycle, 2 ... Vehicle body, 7 ... Headlight, 10 ... Wheel with hub dynamo, 10B ... Wheel with hub dynamo, 11 ... Wheel, 12 ... Tire, 13 ... Rim, 14 ... Spoke, 15 ... Hub insertion part, 15f ... inner peripheral surface, 17A, 17B ... abutting surface, 18, 18B ... concave portion (wheel side engaged portion), 20, 20B ... hub dynamo, 21 ... hub shell, 21f ... outer peripheral surface, 22 ... rotor, 22m ... permanent Magnets 23 ... Stator 23c Coil 25 Hub shaft 27 Flange 28, 28B Projection (hub side engagement part) 29 Output terminal 41 Circumferential engagement part 42 Positioning Part, 43 ... restraint part, 101 ... bolt (fastening bolt), 102 ... bolt, O ... central axis, S1 ... process, S2 ... process, S3 ... process

Claims (15)

1. A wheel provided rotatably around a hub shaft fixed to the vehicle body;
   A hub dynamo provided at the center of the wheel and generating electric power as the wheel rotates,
   A hub insertion portion provided on the wheel for accommodating the hub dynamo, wherein the hub dynamo can be inserted / removed only from one side in the central axis direction of the hub shaft;
   A concave portion formed on one of the inner peripheral surface of the hub insertion portion and the outer peripheral surface of the hub shell of the hub dynamo, and a convex portion formed on the other of the inner peripheral surface of the hub insertion portion and the outer peripheral surface of the hub shell. A circumferential engagement portion that engages the hub insertion portion and the hub shell so as to be non-rotatable in the circumferential direction around the hub shaft by engaging the concave portion and the convex portion;
   A positioning part for defining a position of the hub shell inserted into the hub insertion part in a central axis direction of the hub shaft;
   A restraining portion for restraining the hub shell inserted into the hub insertion portion from moving in the central axis direction;
   Wheel with hub dynamo.
2. The wheel with a hub dynamo according to claim 1, wherein the concave portion and the convex portion are each provided with a plurality of sets at equal intervals in a circumferential direction around the hub shaft.
3. The wheel with a hub dynamo according to claim 1 or 2, wherein the concave portion and the convex portion extend along a central axis direction of the hub shaft.
4. The wheel with a hub dynamo according to any one of claims 1 to 3, wherein the concave portion and the convex portion extend while being inclined with respect to the central axis.
5. When the wheel rotates in the direction in which the vehicle body moves forward, the hub dynamo moves to the other side in the central axis direction with respect to the hub insertion portion due to the relative rotational force generated between the wheel and the hub dynamo. The wheel with a hub dynamo according to claim 4, wherein the concave portion and the convex portion are inclined in a direction of displacement.
6. The wheel with a hub dynamo according to any one of claims 1 to 5, wherein an outer diameter of the hub shell is smaller than an inner diameter of the hub insertion portion.
7. The wheel with a hub dynamo according to any one of claims 1 to 6, wherein the hub insertion portion has a contact surface against which a part of the hub shell inserted into the hub insertion portion abuts as the positioning portion.
8. The wheel with a hub dynamo according to claim 7, wherein the hub shell has a flange portion that extends radially outward on one side in the central axis direction and abuts against the abutting surface of the hub insertion portion.
9. The wheel with a hub dynamo according to any one of claims 1 to 8, wherein the restraining portion includes a bolt that fastens and fixes the hub shell and the hub insertion portion from one side in the central axis direction.
10. The wheel with a hub dynamo according to claim 9, wherein the bolt is disposed between any of the recesses adjacent in the circumferential direction and between the projections.
11. 11. The hub dynamo is inserted into and removed from the hub insertion portion from the same side as the side where the headlamp provided in the vehicle body is provided in the central axis direction. A wheel with a hub dynamo according to one item.
12. The hub dynamo includes an output terminal that outputs electric power generated with the rotation of the wheel to the outside.
    The wheel with a hub dynamo according to claim 11, wherein the output terminal is provided on the same side as a side on which a headlamp provided on the vehicle body is provided in the central axis direction.
13. The wheel with a hub dynamo according to any one of claims 1 to 12, wherein the hub insertion portion and the hub shell of the hub dynamo are formed of a resin material.
14. A hub dynamo provided at the center of a wheel rotatably provided on the vehicle body,
    A hub shell that can be inserted and removed along the central axis direction of the hub insertion portion with respect to the cylindrical hub insertion portion provided at the center of the wheel,
    A rotor provided on the inner periphery of the hub shell and having a permanent magnet;
    A stator having a coil that is provided radially inside with respect to the permanent magnet and outputs an alternating current by rotation of the rotor;
    It is formed on the outer peripheral surface of the hub shell, engages with a wheel side engaged portion formed on the inner peripheral surface of the hub insertion portion, and the hub shell is moved in the circumferential direction around the central axis with respect to the hub insertion portion. A hub side engaging portion that engages in a non-rotatable manner;
    Hub dynamo equipped with.
15. A method for assembling a wheel with a hub dynamo according to any one of claims 1 to 13,
    With respect to the cylindrical hub insertion portion provided at the center of the wheel, the convex portion provided on one of the inner peripheral surface of the hub insertion portion and the outer peripheral surface of the hub dynamo, the inner peripheral surface of the hub insertion portion, and Inserting the hub dynamo from one side in the rotational axis direction of the wheel while engaging the recess provided on the other outer peripheral surface of the hub dynamo;
    A step of abutting a flange portion provided on the hub shell of the hub dynamo and extending radially outward from a rotating shaft direction against a butting surface provided on the hub insertion portion;
    Fastening the flange portion of the hub dynamo and the abutting surface of the hub insertion portion with a fastening bolt;
    A method for assembling a wheel with a hub dynamo.

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