JP2016144259A - Dynamo - Google Patents

Abstract

SOLUTION: A dynamo respectively mounts a coil unit 2 to a surface outer casing plate 1, a fixing member 9 to a back surface outer casing plate 3 through a bearing 9, and the surface outer casing plate 1 to the fixing member 9, and includes an engaging member 13 that engages to a part of a wheel in the back surface of the back surface outer casing plate 3 and allows the back surface outer casing plate to rotate in accordance with a rotation of the wheel. The fixing member 9 is a thicker than the surface outer casing plate 1 and the back surface outer casing plate 3 and has a high intensity, and a projection part 9c projects from the surface outer casing plate 1 and engages with a fork 17.EFFECT: A fixing member has a high intensity, projects from a surface outer casing plate 1, and engages with a fork 17. Therefore, even if the fork is distorted, a dynamo can be attached and properly generate electricity.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a dynamo that is mainly attached to a hub shaft of a bicycle, and generates electricity by rotating a magnet in conjunction with the rotation of a wheel with respect to a coil fixed to the hub shaft. In addition to bicycles, it can also be used for sports equipment such as exercise bikes used in sports gyms.

  The conventional dynamo for bicycles has a structure in which the thickness of the whole dynamo, especially the thickness of the attachment part to the hub axle, is made thin and the whole can be handled as one body, and the attachment work to the hub axle can be easily performed. .

JP 2012-200072 A

  If the dynamo has a structure in which the entire thickness, particularly the thickness of the attachment portion to the hub shaft, is formed thin, the strength of the dynamo is reduced. If you use the bicycle for many years, the fork will be distorted. Also, during the production of forks, burrs or the like may occur at the tip. Due to the distortion, burrs, etc., the surface exterior plate is inclined when the dynamo is attached, and the dynamo cannot be normally attached. Even if the dynamo can be attached when there is such a distortion of the fork, normal power generation cannot be performed and abnormal noise may occur.

  If the strength of the dynamo is increased in order to cope with the distortion of these forks, the dynamo itself will be increased in size and will not be easy to mount.

  Therefore, in view of the drawbacks of the prior art, an object of the present invention is to provide a dynamo capable of normally attaching a dynamo even if the fork is distorted while the dynamo itself is formed thin.

  In order to achieve the above object, a dynamo according to claim 1 is composed of a front surface exterior plate, a coil unit, a back surface exterior plate, a fixing member, and an engagement member. A fixing member is attached to the plate via a bearing, and the front exterior plate is attached to the fixed member, and the rear exterior plate is rotated with the rotation of the wheel by engaging a part of the wheel with the rear surface of the rear exterior plate. The fixing member includes a bearing fitting portion that fits with a bearing, a fixing portion that fixes a mounting state of the surface exterior plate, and a surface exterior plate in the mounted state. And a protruding portion protruding from the plate.

  Moreover, it is preferable that the fixing | fixed part of a fixing member has intensity | strength higher than a surface exterior board at least.

  The fixing member includes a disk-shaped fixing portion, a cylindrical bearing fitting portion protruding from one side surface of the fixing portion, and a protruding portion formed on the other side surface of the fixing portion. It is preferable to have a fixing hole for fixing the surface exterior plate to the part.

  In addition, each consists of a flat outer surface plate, a coil unit, and a back surface outer plate, and the coil unit holds the coil wound in an annular shape from both front and back sides by a pair of annular magnetic pole plates. A pair of magnetic pole plates are formed with claws that alternately protrude from the front and back sides on the outer periphery of the coil and fixed concentrically with the front surface exterior plate, and the inner periphery of the annular rear surface exterior plate is connected via a bearing. A circular fixing member is mounted, and the fixing member and the surface exterior plate are concentrically and integrally fixed so that the back surface exterior plate is rotatable with respect to the surface exterior plate, and the fixed member and the surface exterior are integrally fixed. An attachment hole that allows the bicycle hub axle to pass through is provided at the center of the plate, and an outer peripheral side surface that protrudes on the outer peripheral surface of the coil unit is formed on the outer peripheral portion of the rear exterior plate, and is rotatable between the outer peripheral surface of the coil unit Hold the gap, The magnet is fixed to the inner surface of Kigaishu aspect, it is preferable to provided the engagement member to rotate the back side outer sheet with the rear surface to the rotation of the part engaged with the wheel of the wheels of the rear surface outer plate.

  According to invention of Claim 1, the protrusion part of a fixing member protrudes also from a surface exterior board, and is located so that the fork of a bicycle may be contact | connected. As a result, even if the fork of the bicycle is distorted or has burrs or the like, it does not engage with the projecting portion and distort the dynamo exterior plate to reduce the power generation efficiency.

  According to the second aspect of the present invention, since the fixing member has higher strength than the front surface exterior plate and the back surface exterior plate, the fixing member can counter external force from fork distortion and the like, and the dynamo itself is large-sized. It is possible to maintain the strength without becoming.

  According to the third aspect of the present invention, the fixing member has a fixing hole in the fixing portion, and the fixing member and the surface exterior plate can be firmly fixed through screws or the like.

  According to the invention described in claim 4, a bicycle dynamo having a predetermined strength can be provided in response to a case where a bicycle fork is distorted, etc. Can be provided.

FIG. 2 is a perspective view showing a fixing member used in the present invention, wherein (a) is a perspective view showing a state in which a bearing fitting portion is on an upper side, and (b) is a perspective view showing a state in which a protruding portion is on an upper side. The longitudinal cross-sectional view which shows the use condition which attached the dynamo for bicycles concerning this invention to the bicycle, FIG. 2 is a longitudinal sectional view showing only the bicycle dynamo shown in FIG. 2 is a longitudinal sectional view showing the bicycle dynamo shown in FIG.

Embodiments of a bicycle dynamo according to the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a fixing member of the present invention used for a bicycle dynamo. 2 is a longitudinal sectional view showing a use state of a bicycle dynamo according to the present invention, FIG. 3 is a longitudinal sectional side view of only a bicycle dynamo, and FIG. 4 is an exploded view of the bicycle dynamo shown in FIG. It is a longitudinal cross-sectional view shown.

  As shown in FIG. 1, the fixing member 9 used in the present invention includes a fixing portion 9a, a bearing fitting portion 9b, and a protruding portion 9c, which are integrally formed. The surface exterior plate 1 is made of stainless steel, and the back exterior plate 3 is made of SPCC material (cold rolled steel plate). The fixing member 9 is made of carbon steel S45C and has higher strength than the front exterior plate 1 and the rear exterior plate 3. Moreover, the thickness of the fixing | fixed part 9a in the fixing member 9 is 2.0 mm, and it is formed more thickly than the 0.5 mm surface exterior board 1 and the back surface exterior board 3, and a fixing member has high intensity | strength also from this point. The strength of the fixing member 9 is set to be higher than that of the hub 25 as well as the front exterior plate 1 and the rear exterior plate 3, and it is preferable to do so. Thus, the fixing member 9 is formed so as to have higher strength than at least the front surface exterior plate 1 and the back surface exterior plate 3 (see FIG. 2).

  The fixing portion 9a of the fixing member 9 is formed in a disk shape. On the other hand, the surface exterior plate 1 is formed in a circular dish shape, is one step lower in the center portion of the front plate 1a, has a mounting hole 11 formed at the center position of the bottom surface 1b formed in a bowl shape, and is formed on the outer peripheral portion of the front plate 1a. An outer peripheral side surface 1c is formed (see FIGS. 3 and 4). The outer periphery of the fixing portion 9a of the fixing member 9 is formed so as to fit into the inner outer peripheral surface of the bowl-shaped bottom surface 1b.

  The bearing fitting portion 9b of the fixing member 9 is formed to project in a cylindrical shape from one surface of the disk-shaped fixing portion 9a. The outer peripheral surface of the bearing fitting portion 9 b is engaged with the inner peripheral surface of the circular bearing 8, and the bearing 8 is engaged with the fixing member 9.

  The protruding portion 9c of the fixing member 9 has a bearing fitting portion 9b protruding from one surface (upper surface) of the disk-shaped fixing portion 9a, whereas the circular shape is the central portion of the other surface (lower surface). The part is raised one step to form a trapezoid. The attachment hole 11 of the surface exterior plate 1 is made larger than that of the conventional one so that when the fixing member 9 is attached, the protruding portion 9c of the fixing member 9 protrudes from the surface exterior plate 1 and is exposed. (See FIG. 3). The exposed protruding portion 9c is one step higher than the outer surface of the bottom surface 1b of the surface exterior plate 1.

  The fixing member 9 has a through hole 9d formed at the center thereof. The through hole 9d is formed through each central portion of the bearing fitting portion 9b, the fixing portion 9a, and the protruding portion 9c on one side because it is formed through the center. The fixing portion 9a is formed with screw-hole-like fixing holes 9e and 9e for passing fixing screws 19b and 19b at predetermined positions.

A structure of a bicycle dynamo using the fixing member 9 will be described.
As will be understood from FIGS. 2 to 4, the dynamo for bicycles according to the present invention is composed of a front exterior plate 1, a coil unit 2, and a rear exterior plate 3, all of which are flat and annular.

  The coil unit 2 holds the coil 4 wound in an annular shape by sandwiching it from both front and back sides with a pair of annular magnetic pole plates 5 and 6, and on the outer periphery of the coil 4 from both sides of the pair of magnetic pole plates 5 and 6. The nail | claws 7 and 7 which protrude alternately are formed, and it fixes and unites with the surface exterior board 1 and is united. The surface exterior plate 1 and the coil unit 2 firmly fix the three members of the surface exterior plate 1 and the magnetic pole plates 5 and 6 by passing through a plurality of rivets 19a and 19a arranged in a circular shape. The terminal 20 provided in the coil unit 2 penetrates the surface exterior plate 1 in an insulated state and protrudes to the outside.

  A cylindrical portion 3c is formed in the central portion of the back plate 3b of the annular back plate 3 having the outer peripheral side surface 3a, and a bearing 8 is attached to the cylindrical portion 3c. The bearing fitting portion 9 b of the fixing member 9 is disposed on the inner peripheral portion of the bearing 8, and the back surface exterior plate 3 and the front surface exterior plate 1 are concentrically and integrally fixed by the fixing member 9. By setting it as this structure, the back surface exterior plate 3 rotates freely with respect to the front surface exterior plate 1.

  In the mounting structure of the front exterior plate 1 and the rear exterior plate 3, the bearing fitting portion 9b of the fixing member 9 engages and supports the inner peripheral portion of the bearing 8, and is fixed integrally. At this time, a through hole 9 d is formed in the fixing member 9 so as to be positioned concentrically with the mounting hole 11 of the surface exterior plate 1. Thus, the dynamo integrated by the fixing member 9 serves as a mounting hole through which the center hole penetrates the hub shaft.

  The outer peripheral side surface 3a of the backside exterior plate 3 enters and rotates inside the outer peripheral side surface 1c of the front surface exterior plate 1, and holds a rotatable minute gap with the outer peripheral surface of the coil unit 2, A large number of magnets 12 and 12 that are as small and strong as possible are fixed to the inner peripheral surface of the outer peripheral side surface 3a so that N poles and S poles are alternately arranged. In order to arrange a large number of magnets, the ring plate to which the large number of magnets 12 and 12 are fixed is fixed to the inner surface of the outer peripheral side surface 3 a of the backside exterior plate 3.

  The back plate 3b of the back plate 3 is provided with an engaging member 13 for engaging with a part of a bicycle wheel and rotating the back plate 3 as the wheel rotates. The engagement member 13 is made of rubber, and a rubber hook shaft 24, which is a female screw cylinder, is protruded from the back plate 3b. A rubber engagement member 13 having a through hole is inserted into the rubber hook shaft 24, and the engagement member 13 is stopped. Tighten and fix with screws 17. The rubber hook shaft 24 can be fixed to the backside exterior plate with a screw, or can be fixed by welding or the like.

  The engagement member 13 is preferably an ellipse or an ellipse, and the rotation of the wheel can be reliably transmitted to the backside exterior plate 3 by being firmly inserted between the spokes 16 and 16 of the wheel without a gap.

  In addition to the engagement member 13, a vibration isolating rubber 18 is provided on the back surface of the back exterior plate 3. The anti-vibration rubber 18 is disposed so as to contact the spokes 16 of the wheel from the side surface. The rear surface exterior plate 3 is engaged with a wheel hub at one location by an engagement member 13. At this time, if any external force is applied, the dynamo may vibrate. Therefore, the anti-vibration rubber 18 is provided to prevent rattling.

  The anti-vibration rubber 18 may abut against the side surface of one spoke, but it is effective to abut against the side surfaces of a plurality of spokes. As mentioned earlier, the spoke spacing is not constant across the wheels. In the illustrated embodiment, the anti-vibration rubber 18 is disposed at a position facing the engaging member 13. Moreover, the shape of the anti-vibration rubber is a fan-shaped shape with a constant angle.

  As described above, in the bicycle dynamo according to the present invention, the front exterior plate 1 provided with the coil 4 and the rear exterior plate 3 provided with the magnet 12 are integrally formed. Installation is completed just by attaching. At this time, the axial dimension of the hub shaft 10 necessary for attachment is only the dimension of the fixing portion 9 of the front exterior plate 1 and the rear exterior plate 3, specifically, the axial dimension of the through hole 9d.

  An attached state of the bicycle dynamo according to the present invention will be described with reference to FIG. A hub 25 is rotatably mounted on the hub axle 10 of the bicycle wheel, and is fixed in place by lock nuts 26 and 26. In this state, the dynamo according to the present invention is inserted from one end of the hub shaft 10 with the back surface exterior plate 3 facing the hub direction, and the engaging member 13 is engaged with the spokes 16 and 16 of the wheel. The anti-vibration rubber 18 is brought into contact with the side surface of the spoke. In this state, the front ends of the forks 27 and 27 and the front ends of the luggage cage stays 28 and 28 are inserted into the hub shaft 10, and the whole is fastened and fixed with nuts 29 and 29 with the washer member 30 interposed therebetween.

  When the bicycle wheel rotates in the assembled state, the rear exterior plate 3 engaged with the spoke 16 rotates and the front exterior plate 1 is fixed. Therefore, power is generated by the relative rotation of the magnet 12 fixed to the back surface exterior plate 3 and the coil 4 fixed to the front surface exterior plate 1, and is connected to the terminal 20 projecting out of the surface exterior plate. By doing so, the light can be turned on.

DESCRIPTION OF SYMBOLS 1 ... Surface exterior plate, 1a ... Front plate, 1b ... Bottom surface, 1c ... Outer peripheral side surface, 2 ... Coil unit, 3 ... Backside exterior plate, 3a ... Outer peripheral side surface, 3b ... Back surface plate, 3c ... Cylindrical part, 4 ... Coil 5, 6 ... Magnetic pole plate, 7 ... Claw, 8 ... Bearing, 9 ... Fixing member, 9a ... Fixing part, 9b ... Bearing fitting part, 9c ... Projection part, 9d ... Through hole, 9e ... Fixing hole 10 ... Hub 11 ... Mounting hole, 12 ... Magnet, 13 ... Engagement member, 16 ... Spoke, 17 ... Set screw, 18 ... Anti-vibration rubber, 19a ... Rivet, 19b ... Screw, 20 ... Terminal, 24 ... Rubber hook shaft, 25 ... hub, 26 ... lock nut, 27 ... fork, 28 ... stay, 29 ... nut, 30 ... washer member.

Claims (4)

The surface exterior plate, the coil unit, the back surface exterior plate, the fixing member, and the engaging member, the coil unit on the surface exterior plate, the fixing member on the back surface exterior plate via the bearing, and the fixing member Each is equipped with a front exterior plate, and has an engagement member that engages with a part of the wheel on the back surface of the back surface exterior plate and rotates the back surface exterior plate with the rotation of the wheel,
The fixing member includes: a bearing fitting portion that fits with the bearing; a fixing portion that fixes the mounting state of the surface exterior plate; and a protruding portion that protrudes from the surface exterior plate in the mounted state with the surface exterior plate. A dynamo characterized by   The dynamo according to claim 1, wherein the fixing portion of the fixing member has at least higher strength than the surface exterior plate.   The fixing member includes a disk-shaped fixing portion, a cylindrical bearing fitting portion protruding from one side surface of the fixing portion, and a protruding portion formed on the other side surface of the fixing portion. The dynamo according to claim 1, further comprising a fixing hole for fixing to the surface exterior plate. Each consists of a flat outer surface plate, a coil unit, and a rear surface outer plate, and the coil unit holds the coil wound in an annular shape from both front and back sides by a pair of annular magnetic pole plates, A pair of magnetic pole plates is formed with claws that alternately protrude from the front and back sides on the outer periphery of the coil, and fixed concentrically with the surface exterior plate,
A circular fixing member is attached to the inner periphery of the annular backside exterior plate via a bearing, and the fixing member and the surface exterior plate are fixed concentrically and the backside exterior plate is attached to the surface exterior plate. A mounting hole that allows the bicycle hub axle to pass through is provided at the center position of the fixed member and the surface exterior plate, which are rotatable and integrated,
Forming an outer peripheral side surface projecting on the outer peripheral surface of the coil unit on the outer peripheral portion of the backside exterior plate, holding a rotatable gap with the outer peripheral surface of the coil unit, and fixing a magnet to the inner surface of the outer peripheral side surface; The engagement member which engages with a part of a wheel on the back surface of the back surface exterior plate and rotates the back surface exterior plate as the wheel rotates is provided. Dynamo.

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