JP3212217U - Hub dynamo - Google Patents

Abstract

To provide a hub dynamo capable of easily connecting a power supply cable and having good durability even in the case of a two-terminal structure. A hub dynamo 10 for generating electric power by rotating a wheel and supplying electric power to an electrical component of a bicycle on which the wheel is provided, and rotates together with the wheel while supporting the wheel at its axial position. A hub housing 20 that houses the generator therein, a hub shaft 50 that rotatably supports the hub housing 20 at the axial center position, a terminal cover 80 for insulating the two terminals 60 and 70 from each other, The terminal cover 80 includes a flat end surface that has a thickness in the axial direction and is linear when viewed from the axial direction, and each of the two terminals 60 and 70 includes a terminal The cover 80 is provided so as to protrude from the flat end surface. [Selection] Figure 2

Description

  The present invention relates to a hub dynamo.

  Conventionally, a hub dynamo for generating electric power by rotating a wheel and supplying electric power to an electrical component (for example, a lighting device) of a bicycle provided with the wheel is known. As such a hub dynamo, for example, there is a current-carrying structure for bicycle electrical components disclosed in Patent Document 1.

  In Patent Document 1, a hub dynamo is mounted in a hub assembly that is pivotally supported by a hub shaft, and a harness that is a plus-side power supply cable is wound around a basket stay from the output terminal of the hub dynamo and wired upward. It is described that it is done. Further, it is described that the lower end portion of the front fork and the lower end portion of the basket stay are inserted into the hub shaft sequentially from the inside, and are fastened and fixed by a Kikuza hub washer, a hub washer and a hub nut.

JP 2014-234125 A

  Incidentally, in Patent Document 1 and other conventional hub dynamometers, generally, a protective member for protecting the signal line terminal is provided on the power supply cable side. The protection member is configured to cover the signal line terminal by connecting the power supply cable to the signal line terminal. Further, in the conventional hub dynamo, generally, a terminal cover for insulating the signal line terminal and the hub shaft forming the ground is provided. And the temporary protection member for protruding from the terminal cover along the signal line terminal and temporarily protecting the signal line terminal before being connected to the power supply cable is provided. However, there is a problem that it is difficult to connect the power supply cable to the signal line terminal due to the temporary protection member. There is also a problem that durability is insufficient due to the temporary protection member being easily broken and broken.

  Furthermore, although not described in Patent Document 1, there is known a hub dynamo having a two-terminal structure provided with a ground wire terminal provided in addition to the signal line terminal as described above. The hub dynamo having the two-terminal structure has a problem that the above-described problem can be remarkable.

  Accordingly, an object of the present invention is to provide a hub dynamo capable of easily connecting a power supply cable and having good durability even in the case of a two-terminal structure.

  In order to solve the above problems, a hub dynamo according to the present invention is a hub dynamo for generating electric power by rotating a wheel and supplying electric power to an electrical component of a bicycle provided with the wheel. A hub housing that rotates with the wheel while supporting at its axial position and accommodates a generator inside, a hub shaft that rotatably supports the hub housing at the axial position, and supported by the hub shaft A signal line terminal extending along the axial end surface of the hub housing, a ground line terminal provided alongside the signal line terminal, and a terminal cover for insulating the two terminals from each other; The terminal cover includes a flat end surface having a thickness in the axial direction and formed in a straight line when viewed from the axial direction, and the two terminals are respectively It is provided so as to protrude from the flat end surface of the terminal cover.

  According to this configuration, even in the case of the two-terminal structure, it is difficult to connect the power supply cable by being obstructed by the temporary protection member provided so as to protrude along the signal line terminal as in the past. There is no. Moreover, since there is no possibility that the temporary protective member is damaged, the durability is not insufficient. As described above, the present invention can provide a hub dynamo capable of easily connecting a power supply cable and having good durability even in the case of a two-terminal structure.

  The hub housing includes a cylindrical housing main body, and a disk-shaped hub rod extending from the both end portions in the axial direction of the housing main body in a diameter-enlarging direction. An inclined surface that approaches the housing body in the axial direction as it goes in the diameter-expanding direction.

  According to this configuration, it is possible to prevent the plurality of spokes provided on the wheels and the hub rod from interfering with each other, and to improve the aesthetic appearance.

  The present invention can provide a hub dynamo capable of easily connecting a power supply cable and having good durability even in the case of a two-terminal structure.

1 is a partial side view of a bicycle to which a hub dynamo according to an embodiment of the present invention is attached. 1 is an external perspective view of a hub dynamo according to an embodiment of the present invention. 1 is a side view of a hub dynamo according to an embodiment of the present invention. 1 is a front view of a hub dynamo according to an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same or corresponding elements are denoted by the same reference numerals throughout all the drawings, and redundant description thereof is omitted.

(Hub Dynamo 10)
FIG. 1 is a partial side view of a bicycle to which a hub dynamo according to an embodiment of the present invention is attached. As shown in FIG. 1, the hub dynamo 10 according to the present embodiment is used by being attached to the center of a front wheel 110 (wheel) of a bicycle 100. The hub dynamo 10 generates electric power by rotating the front wheel 110 and supplies electric power to an electrical component (for example, a lighting device) of the bicycle 100. The electric power supplied to the bicycle 100 is used, for example, to turn on the lighting device of the bicycle 100.

  FIG. 2 is an external perspective view of the hub dynamo according to the embodiment of the present invention. FIG. 3 is a side view of the hub dynamo. FIG. 4 is a front view of the hub dynamo. As shown in FIGS. 2 to 4, the hub dynamo 10 according to the present embodiment rotates with the front wheel 110 while supporting the front wheel 110 at its axial position, and houses a generator (not shown) therein. A housing 20; a hub shaft 50 that rotatably supports the hub housing 20 at an axial position; a signal line terminal 60 that is supported by the hub shaft 50 and extends along an end surface in the axial direction of the hub housing 20; A ground wire terminal 70 (hereinafter also simply referred to as “two terminals 60, 70”) provided together with the signal line terminal 60, a terminal cover 80 for insulating the two terminals 60, 70 from each other, Is provided.

(Hub housing 20)
The hub housing 20 includes a cylindrical housing body 30 and disk-shaped hub rods 40a and 40b extending in the diameter-expanding direction from both axial end portions of the housing body 30. The hub flange 40a is integrally formed at one end portion in the axial direction of the housing body 30, and the hub flange 40b is integrally formed at the other end portion.

  The diameter of the housing body 30 is not constant, and varies depending on the position in the axial direction. Specifically, the radial dimension is relatively large from one end portion in the axial direction of the housing body 30 to the central portion, and the radial dimension is relatively small at the other end portion. The above-described generator (not shown) composed of a coil, a permanent magnet, and the like is accommodated in the housing body 30.

  The hub rod 40 a supports the front wheel 110 via the spoke 130. For this purpose, a plurality of spoke holes 48 are formed in the vicinity of the peripheral edge of the hub rod 40a at equal intervals along the peripheral edge. The end portions of the spokes 130 of the bicycle 100 are passed through the plurality of spoke holes 48, respectively. Thereby, the hub housing 20 can rotate with the front wheel 110 while supporting the front wheel 110 at the axial center position.

  Further, the peripheral edge of the hub flange 40a has an inclined surface 42 that approaches the housing body 30 in the axial direction as it goes in the diameter-expanding direction. In other words, the peripheral edge of the hub flange 40a is formed by tapering the edge portion on the outer surface side (one end side in the axial direction) to form the inclined surface 42. Hub hub 40b has only a target structure in the axial direction, and the description thereof will not be repeated here.

  The hub housing 20 includes a hub shaft 50 between a terminal cover 80, a washer 90, and a lock nut 92a provided along the outer surface of the hub rod 40a, and a lock nut 92b provided along the outer surface of the hub rod 40b. Is positioned in the axial direction. Such a hub housing 20 may be formed using, for example, aluminum die casting. The hub housing 20 is supported so as to be rotatable with respect to the hub shaft 50 via, for example, a radial bearing provided therein, and the terminal cover 80, the washer 90, and the lock nuts 92a and 92b described above are all included. It is provided on the hub shaft 50 side. When the hub dynamo 10 is mounted on the bicycle 100, the side surface of the lock nut 92b is covered with a resin cap 94. In FIG. 3, for the convenience of illustration, the cap 94 is indicated by a two-dot chain line.

(Hub shaft 50)
The hub axle 50 is attached to the bicycle 100 such that the axial direction of the hub axle 50 coincides with the thickness direction of the front wheel 110. Specifically, the hub axle 50 is attached to the bicycle 100 with both ends in the axial direction supported by a front fork 120 constituting a part of the body of the bicycle 100. The hub shaft 50 is provided so as to penetrate the axial center position of the cylindrical hub housing 20. A screw groove (not shown) for screwing the lock nuts 92a and 92b may be formed on the outer surface of the hub shaft 50.

(Two terminals 60, 70)
The signal line terminal 60 is an output terminal that is electrically connected to the plus terminal of the electrical component of the bicycle 100 via a power supply cable and supplies the electric component with the power generated by the generator. The ground wire terminal 70 is electrically connected to, for example, a negative terminal (ground terminal) of an electrical component via a ground cable. These two terminals 60 and 70 are provided so as to extend parallel to each other along the outer surface of the hub flange 40a of the hub housing 20. Further, these two terminals 60 and 70 are provided so as to protrude from a flat end face 82 described later of the terminal cover 80, respectively.

  The width dimension of the signal line terminal 60 (the dimension along the left-right direction in FIG. 4) is smaller than the width dimension of the ground line terminal 70 (the same as before). The signal line terminal 60 and the ground line terminal 70 are provided at the same position in the axial direction. As a result, in FIG. 3, the ground wire terminal 70 cannot be seen behind the signal wire terminal 60. Furthermore, the signal line terminal 60 and the ground line terminal 70 are provided so as to be separated from each other by about one of the width dimensions as viewed from the axial direction. This makes it possible to connect the power supply cable more easily. In the present embodiment, as shown in FIG. 4, the ground wire terminals 70 are provided apart from each other by about the width dimension.

  By the way, in each cable for power supply and ground (not shown), the socket portion connected to the two terminals 60 and 70 has a protective member (not shown) for protecting the connection state between the cable and the terminal. (Not shown) is attached. This protective member is formed in a tube shape with, for example, a flexible resin, and so that the terminal and the socket can be integrally covered in a state where each cable is connected to each of the two terminals 60 and 70. It is configured. It is preferable that these two terminals 60 and 70 protrude from the flat end face 82 described later of the terminal cover 80 by the same dimension. Thereby, it becomes easy to attach the protective member provided on the cable side.

(Terminal cover 80)
The terminal cover 80 is provided to insulate the signal line terminal 60 and the ground line terminal 70 (two terminals) from each other and hold the ground line terminal 70. The terminal cover 80 includes a flat end face 82 having a predetermined thickness in the axial direction and formed so as to be linear when viewed from the axial direction. The term “flat” as used herein widely means that the shape is linear when viewed from the axial direction, and for example, a claw-like temporary protective member or the like protrudes along the signal line terminal as in the prior art. Any shape that is not provided may be used. Therefore, the flat end face 82 may be provided with a through-hole through which the two terminals 60 and 70 pass, as in the present embodiment.

  The terminal cover 80 has a shape in which a rectangle and a semicircle are combined by rounding a predetermined side of the rectangular body into an arc shape when viewed from the axial direction, and a portion located on the opposite side of the one side Forms a flat end face 82. Specifically, when viewed from the axial direction, the terminal cover 80 hangs down in a direction opposite to the direction in which the two terminals 60 and 70 protrude from one end of the flat end surface 82, and is linear. And an end face 86 formed on the other side of the flat end face 82 so as to be linear from the other end of the flat end face 82 in the same direction as the end face on the one side. And an end portion of the end surface 84 on one side that is hung down and an end portion of the end surface 86 on the other side that is hung down are connected to each other so as to form a circular arc concentric with the hub shaft 50. And an arcuate end surface 88 formed on the surface.

  The terminal cover 80 is provided with a through hole through which the hub shaft 50 passes in a portion concentric with the hub shaft 50. The terminal cover 80 is positioned along the outer surface of the hub collar 40a in the hub housing 20 and is fixed to the hub shaft 50 in a non-rotatable state. The terminal cover 80 is positioned in the axial direction between the outer surface of the hub collar 40a and a lock nut 92a provided via a washer 90. The terminal cover 80 is configured as an insulating member, and may be formed using, for example, a synthetic resin. The cap 94 provided along the outer surface of the hub collar 40 b in the hub housing 20 may also be formed using the same material as that of the terminal cover 80.

(effect)
As described above, the hub dynamo 10 according to the present embodiment includes the two terminals 60 and 70 provided so as to protrude from the flat end surface 82 of the terminal cover 80. As a result, the hub dynamo 10 according to the present embodiment does not become difficult to connect the power supply cable by being obstructed by a temporary protection member provided so as to protrude along the signal line terminal as in the prior art. . Moreover, since there is no possibility that the temporary protective member is damaged, the durability is not insufficient. As a result, even in the case of the two-terminal structure, the hub dynamo 10 according to the present embodiment can easily connect the power supply cable and has good durability.

  In the present embodiment, the peripheral portions of the hub flanges 40a and 40b have inclined surfaces 42 that approach the housing body 30 in the axial direction as they extend in the diameter-enlarging direction. As a result, the plurality of spokes 130 provided on the front wheel 110 and the hub rods 40a and 40b can be prevented from interfering with each other, and the aesthetic appearance can be improved.

  From the above description, many modifications and other embodiments of the present invention are obvious to one skilled in the art. Accordingly, the foregoing description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. Details of the structure and / or function may be substantially changed without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Hub dynamo 20 Hub housing 30 Housing main body 40a, 40b Hub flange 42 Inclined surface 48 Spoke hole 50 Hub shaft 60 Signal terminal 70 Ground terminal 80 Terminal cover 82 Flat end surface 84 One end surface 86 The other end surface 88 Circle Arc-shaped end face 90 Washer 92a, 92b Lock nut 94 Cap 100 Bicycle 110 Front wheel 120 Front fork 130 Spoke

Claims (2)

A hub dynamo for generating electricity by rotating a wheel and supplying electric power to a bicycle electrical component provided with the wheel,
A hub housing that rotates with the wheel while supporting the wheel at its axial position, and houses a generator inside;
A hub shaft that rotatably supports the hub housing at the axial position;
A signal line terminal supported by the hub shaft and extending along an end surface of the hub housing in the axial direction, and a ground line terminal provided alongside the signal line terminal;
A terminal cover for insulating the two terminals from each other;
The terminal cover includes a flat end surface having a thickness in the axial direction and formed to be linear when viewed from the axial direction,
Each of the two terminals is a hub dynamo provided so as to protrude from a flat end surface of the terminal cover. The hub housing has a cylindrical housing main body, and a disk-shaped hub flange extending in the diameter-expanding direction from both axial end portions of the housing main body,
2. The hub dynamo according to claim 1, wherein a peripheral portion of the hub rod has an inclined surface that approaches the housing body in the axial direction as it goes in the diameter-expanding direction.

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