JP2013159242A - Grounding potential supplier for hub dynamo - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grounding potential supplier for a hub dynamo that can easily use a one-wire type hub dynamo attached to a frame together with a wheel as a two-wire type hub dynamo without attaching/detaching the wheel, and realizing the positional relationship between a power source terminal and a grounding terminal in which the wiring work can be easily executed even to any kind of hub dynamos.SOLUTION: A grounding potential supplier 6 includes a flat attaching plate 50 which is attached by an outer surface of a fork end 4 and an inner surface of a fixing nut 17 directly, or indirectly via a conductive member such as a washer 18 for the fixing nut or the like, and electrically connected to a hub shaft 16 directly or indirectly via the fixing nut 17, a grounding terminal 54 which is electrically connected to the attaching plate 50 to supply the grounding potential of a hub dynamo 5 to an electric apparatus, and positioning parts 52, 53 which are fixed to the attaching plate 50 to position the attaching plate 50 with respect to the fork end 4.

Description

The present invention relates to a ground potential supply tool for supplying a ground potential of a bicycle hub dynamo to an electric device.

  As a bicycle hub dynamo, the ground potential of the power generation coil is supplied to the hub shaft, and the power supply potential (non-ground potential) of the power generation coil is electrically used as a terminal fixed to the hub shaft for connecting external wiring. A one-wire hub dynamo having only a power supply terminal for connecting a power supply line to be supplied to a device is known. If such a hub dynamo is used, the external wiring to the electrical equipment is only one power line connected to the power terminal, and wiring work is easy.

  However, this hub dynamo supplies the ground potential from the hub axle to the electrical equipment through the bicycle frame, so if the coating thickness of the frame is thick or if you do not want to scratch the paint, or if the ground potential is external, When using an electrical device that has to be input by wiring, there is a problem that it cannot be used as it is.

  In order to solve such a problem, a terminal adapter that can easily change a one-wire connector having only one connection terminal to a two-wire connector having two connection terminals has been proposed (Patent Document). 1 paragraph [0006], see FIG. 4).

  The terminal adapter includes a mounting portion that is disposed in contact with an outer surface in the axial direction of a lock nut that fixes the connector having the first connection terminal to the hub shaft, and is mounted so as to be electrically connectable to the hub shaft; And a second connection terminal and a rotation preventing portion formed integrally with each other (see paragraphs [0031] to [0032] of Patent Document 1).

  In this way, since the terminal adapter is arranged outside the lock nut in the axial direction, the assembly of the power generation hub is completed and the terminal adapter is attached after the lock nut is tightened. The second connection terminal can be easily added to the existing connector, and a connector having only one first connection terminal can be easily changed to a connector having two connection terminals (see paragraph [1] of Patent Document 1). 0037] and [0039]).

  However, when installing the terminal adapter as a retrofit, first remove the power cable from the first connection terminal, remove the left and right fixing nuts, then remove the power generation hub with the front wheels from the front fork, and remove the lock nut of the removed power generation hub. Attach the terminal adapter to the connector from the outside, then attach the front hub with the front wheel, attach the left and right fixing nuts, reconnect the power line to the first connection terminal, and finally connect the ground wire An operation of connecting to the second connection terminal is required (see paragraph [0038] of Patent Document 1).

  For this reason, a series of operations for attaching the terminal adapter in a retrofit is considerably complicated, and since the operation includes attachment / detachment of the front wheels, it is particularly difficult for the user to perform the operation safely and reliably.

Moreover, since the terminal adapter is prevented from rotating with respect to the hub axle, the positional relationship between the first connection terminal and the second connection terminal provided on the connector fixed to the hub axle is uniquely determined, and there is only one connection terminal. When changing the connector not to be used into a connector having two connection terminals, the two connection terminals can be aligned, and wiring work for the two connection terminals can be easily performed (see paragraph [0040] of Patent Document 1). ).
However, the fact that the positional relationship between the first connection terminal and the second connection terminal is uniquely determined is used for a specific type of hub dynamo (that is, a hub dynamo in which the first connection terminal is provided at a specific position). Even if the position of the second connection terminal can be set so that the wiring work can be performed easily, if the same terminal adapter is used for another type of hub dynamo such as another manufacturer's product, the wiring work of both terminals is performed conversely. There is a possibility of a difficult positional relationship.

For this reason, it is not possible to realize the positional relationship between the first connection terminal and the second connection terminal that facilitates the wiring work for any type of hub dynamo with one type of terminal adapter.

JP 2006-199251 A

The present invention solves such problems in the prior art, and makes it easy to use a one-wire hub dynamo mounted on a frame together with wheels as a two-wire hub dynamo without detaching the wheels. A hub dynamo grounding device that can realize a positional relationship between a power supply terminal and a grounding terminal that can be easily wired to any type of hub dynamo. An object of the present invention is to provide a potential supply device and the like.

  A hub dynamo ground potential supply device according to the present invention is a hub dynamo ground potential supply device for supplying a ground potential of a hub dynamo supplied to a hub shaft to an electric device, and is a fork end supporting a hub shaft. A sandwich plate sandwiched between the outer surface and the inner surface of the fixing nut that fixes the hub shaft to the fork end, and electrically connected to the hub shaft via the fixing nut, and electrically connected to the sandwich plate And a grounding terminal for supplying the ground potential of the hub dynamo to the electric device, and a positioning part fixedly provided on the sandwiching plate and positioning the sandwiching plate with respect to the fork end.

The features of the present invention can be broadly shown as described above, but the configuration and contents thereof, together with the objects and features, will be further clarified by the following disclosure in view of the drawings.

  A hub dynamo ground potential supply device according to a first invention of the present application is a hub dynamo ground potential supply device for supplying a ground potential of a hub dynamo supplied to a hub shaft to an electric device, and supports the hub shaft. A sandwich plate sandwiched between the outer surface of the fork end and the inner surface of the fixing nut that fixes the hub shaft to the fork end, and electrically connected to the hub shaft via the fixing nut; A hub having a ground terminal for connecting the ground potential of the hub dynamo to an electrical device and a positioning portion fixedly provided on the sandwiching plate and positioning the sandwiching plate with respect to the fork end. This is a dynamo ground potential supply tool.

  In this way, by configuring the clamping plate to be sandwiched between the outer surface of the fork end and the inner surface of the fixing nut, it is extremely easy to attach the ground potential supply tool for hub dynamo later. become. That is, in this case, after loosening (or removing) one of the fixing nuts, a sandwiching plate is inserted between the outer surface of the fork end and the inner surface of the fixing nut, and then the fixing nut is tightened. Finally, it is only necessary to connect the ground wire to the ground terminal.

  That is, unlike the prior art described above, it is not necessary to remove or remount the hub dynamo from the fork end together with the wheels. In this connection, it is also necessary to remove or attach the fixing nut on the side opposite to the side where the hub dynamo ground potential supply tool is installed. There is no need to connect.

  For this reason, the one-wire hub dynamo mounted on the frame together with the wheels can be easily used as a two-wire hub dynamo without removing and attaching the wheels.

  Further, by providing a positioning portion for positioning the sandwiching plate with respect to the fork end, the ground terminal provided on the sandwiching plate can be set at a position where wiring work can be easily performed in relation to the fork end. Furthermore, since the rotation angle (fixed angle) of the hub shaft relative to the fork end when the hub shaft is fixed to the fork end can be adjusted in any way, the ground terminal provided on the clamping plate and the hub shaft The relationship of the rotational position with the fixed power supply terminal can be arbitrarily adjusted regardless of the type of hub dynamo.

  For this reason, it is possible to realize the positional relationship between the power supply terminal and the ground terminal that facilitates wiring work for any type of hub dynamo.

  That is, a hub dynamo ground potential supply device that enables a one-wire hub dynamo mounted on a frame to each wheel to be easily used as a two-wire hub dynamo without removing and attaching wheels, In addition, it is possible to realize a hub dynamo ground potential supply device that can realize the positional relationship between the power supply terminal and the ground terminal that can be easily wired for any type of hub dynamo.

  A hub dynamo ground potential supply device according to a second invention of the present application is a hub shaft for being drilled in a sandwiching plate and inserted through and held by the hub shaft in the hub dynamo ground potential supply device according to the first invention of the present application. It has a holding hole and an engaging protrusion that is provided on the fork end side of the sandwiching plate and engages with an engaging recess provided on the outer surface of the fork end.

  That is, the hub dynamo ground potential supply tool has a hub shaft holding hole for inserting and holding the hub shaft, and an engagement protrusion for engaging with an engagement recess provided on the outer surface of the fork end. Even if the fixing nut is slightly loosened for some reason, the hub shaft is suspended and held on the fork end via the engaging projection of the hub dynamo ground potential supply tool and the hub shaft holding hole. be able to.

  With this configuration, it is possible to use both the wheel dropout prevention fitting and the hub dynamo ground potential supply tool, which are extremely important for safety measures, without increasing the number of parts and suppressing an increase in cost.

A hub dynamo system according to a third invention of the present application is a hub dynamo system including a hub dynamo ground potential supply device according to any one of the first to second inventions of the present application, and a hub dynamo, A hub shaft fixedly mounted with a stator having a power generation coil, and a hub body fixedly mounted with a rotor having a permanent magnet on an inner peripheral surface and rotatably supported by the hub shaft; A power supply in which one end of the generator coil is electrically connected to the hub shaft to supply a ground potential to the hub shaft, and the other end of the generator coil is fixedly attached to the hub shaft outside the hub body. A hub dynamo system configured to supply a power supply potential to a power supply terminal by being electrically connected to the terminal. Accordingly, the same effects as those of the first or second invention of the present application are obtained.

FIG. 1 is a side view showing the vicinity of a front wheel 10 of a bicycle 1 provided with a hub dynamo system 60. FIG. 2 is a side view showing the hub dynamo 5 and the ground potential supply tool 6 mounted on the bicycle 1. FIG. 3 is a half sectional view of the hub dynamo 5 and the ground potential supply tool 6 of FIG. FIG. 4 is a side view showing the ground potential supply tool 6. FIG. 5A is a view of the ground potential supply tool 6 of FIG. 4 as seen from VA. FIG. 5B is a view of the ground potential supply tool 6 of FIG. 4 as viewed from VB. FIG. 6 is a side view showing the wheel dropout prevention fitting 46. FIG. 7 is a diagram for explaining a procedure for mounting the ground potential supply tool 6 to the bicycle 1. FIG. 8 is a drawing for explaining a procedure for mounting the ground potential supply tool 6 to the bicycle 1. FIG. 9 is a side view showing the ground potential supply tool 106. FIG. 10A is a view of the ground potential supply tool 106 of FIG. 9 as viewed from XA. FIG. 10B is a view of the ground potential supply tool 106 of FIG. 9 as viewed from XB. FIG. 11 is a side view showing the ground potential supply tool 206. 12A is a view of the ground potential supply tool 206 of FIG. 11 as viewed from XIIA. FIG. 12B is a view of the ground potential supply tool 206 of FIG. 11 as seen from XIIB. FIG. 13 is a side view showing the ground potential supply tool 306. 14A is a view of the ground potential supply tool 306 of FIG. 13 as viewed from XIVA. FIG. 14B is a view of the ground potential supply tool 306 of FIG. 13 as viewed from XIVB.

  First, a description will be given of an earth potential supply tool 6 that is a ground potential supply tool for a hub dynamo according to an embodiment of the present invention, and a hub dynamo system 60 including the earth potential supply tool 6 and the hub dynamo 5.

  FIG. 1 is a side view showing the vicinity of a front wheel 10 of a bicycle 1 provided with a hub dynamo system 60.

  As shown in FIG. 1, the bicycle 1 includes a frame 3 having a front fork 2 (not shown) formed in a bifurcated shape so as to sandwich the front wheel 10, and is provided at the lower end of the front fork 2. One end of the hub dynamo 5 is held on the fork end 4 and a ground potential supply tool 6 is mounted. The other side of the hub dynamo 5 is held on the other fork end 44 of the front fork 2 (see FIG. 3).

  One end of a power line 7 and a ground line 8 is connected to the hub dynamo 5 and the ground potential supply tool 6, respectively, and the other end thereof is connected to a power input terminal and a ground input terminal ( Neither is shown). The front wheel 10 of the bicycle 1 is coupled to the hub dynamo 5 via spokes 11.

  The end portions of the mudguard stay 13 that supports the mudguard 12 and the front paddle stay 15 that supports the front bar 14 are both formed in an annular shape using a conductive material (for example, metal) (both are Not shown). The hub shaft holding hole 51 (described later) of the ground potential supply tool 6 and the ends of the stays 13 and 15 are sequentially fitted into the hub shaft 16 of the hub dynamo 5 protruding to the outer surface side of the fork end 4, and finally, A fixing nut 17 having conductivity is screwed into the hub shaft 16 and is sandwiched between the outer side surface of the fork end 4 and the inner side surface of the fixing nut 17. In this state, the hub shaft 16 and the ground potential supply tool 6 are electrically connected via the fixing nut 17 and the ends of the stays 13 and 15.

  FIG. 2 is a side view showing the hub dynamo 5 and the ground potential supply tool 6 mounted on the bicycle 1. FIG. 3 is a half sectional view of the hub dynamo 5 and the ground potential supply tool 6 of FIG. In FIG. 2 and FIG. 3, for convenience of explanation, description of the power supply line 7 and the ground wire 8, the spoke 11, the mudguard stay 13 and the front stay 15 is omitted, and the ground potential supply tool 6 and the inner surface of the fixing nut 17 A fixing nut washer 18 having conductivity is interposed between the two. Therefore, the hub shaft 16 and the ground potential supply tool 6 are electrically connected via the fixing nut 17 and the fixing nut washer 18.

  As shown in FIG. 3, the hub dynamo 5 includes a hub shaft 16 and a hub body 22 that is rotatably supported by the hub shaft 16 via a pair of bearings 20 and 21. A number of spoke holes 19 (see FIG. 2) for locking one end of the spoke 11 are formed in the flange portion of the hub body 22. The hub body 22 is formed by being divided into a hub body main body 22a and a hub body lid body 22b. When the hub dynamo 5 is assembled, these are screwed and coupled.

  A stator 28 having a stator core 23, a pair of stator yokes 24 and 25, and a power generation coil 27 wound around a bobbin 26 is fixedly attached to an intermediate portion in the longitudinal direction of the hub shaft 16. A rotor 31 including a back yoke 29 and a plurality of permanent magnets 30 is fixedly mounted at a position facing the stator 28 on the inner peripheral surface of the hub body 22. The stator 28 and the rotor 31 constitute a generator (dynamo).

  One end (not shown) of the power generation coil 27 is electrically connected to the hub shaft 16 via the ground connection piece 32. The other end (not shown) of the power generating coil 27 is an inner portion led out of the hub body 22 along a notch groove (not shown) provided in a part of the outer periphery of the hub shaft 16 in the axial direction. It is electrically connected to the power supply terminal 34 via the wiring 33 (partially not shown).

  The power terminal 34 is fixedly held by a terminal cover 35, and the terminal cover 35 is fixedly attached to the hub shaft 16 by a lock nut 36 screwed into the hub shaft 16. That is, the power terminal 34 is fixedly attached to the hub shaft 16. Note that the lock body 36 and the lock nuts 37 and 38 that are fixed to the hub shaft 16 restrict the hub body 22 and the hub shaft 16 from moving relative to each other in the hub shaft direction. A waterproof cap 39 configured to cover the terminal cover 35 from the side is fixed to the hub shaft 16.

  FIG. 4 is a side view showing the ground potential supply tool 6. FIG. 5A is a view of the ground potential supply tool 6 of FIG. 4 as seen from VA. FIG. 5B is a view of the ground potential supply tool 6 of FIG. 4 as viewed from VB. FIG. 6 is a side view showing the wheel dropout prevention fitting 46.

  As shown in FIGS. 4 and 6, the fork ends 4 and 44 are fixedly provided at a pair of ends of the front fork 2 on the hub shaft 16 side. The fork end 4 includes a fork connection part 4a connected to the front fork 2, a tip edge part 4b which is an edge part opposite to the fork connection part 4a, a front edge part 4c which is an edge part on the traveling direction side of the bicycle, a bicycle The basic shape is a member having a substantially rectangular plate shape surrounded by a rear edge portion 4d which is an edge portion on the opposite side to the traveling direction.

  The fork end 4 is formed with a notch 40 for detachably holding the hub shaft 16. The cut 40 is formed in a substantially “U” shape that opens forward and downward (downward in FIG. 4) when the bicycle 1 is placed on a flat ground. That is, the notch 40 is formed toward the fork connecting portion 4a so as to open to the front edge portion 4b and to have a longitudinal direction substantially parallel to the front edge portion 4c and the rear edge portion 4d. The end of the notch 40 on the fork connecting portion 4a side is a substantially semicircular bottom portion.

  An engagement recess 45 is provided slightly above (from the fork connecting portion 4a) in FIG. 4 from the bottom 42 of the notch 40 of the fork end 4. In this example, the engagement recess 45 is arranged on a line that substantially coincides with the center line in the longitudinal direction of the notch 40 (the movement locus of the hub shaft center when the hub shaft 16 is attached to and detached from the fork end 4). In this example, the engagement recess 45 is a substantially circular through hole. The fork end 44 has a substantially mirror surface structure with the fork end 4. Accordingly, the fork end 44 is also provided with an engaging recess 49 slightly above the bottom 43 of the notch 41 in FIG.

  The ground potential supply tool 6 shown in FIG. 4 is for supplying the ground potential of the hub dynamo 5 supplied to the hub shaft 16 to an electrical device such as the headlamp 9. The ground potential supply tool 6 is clamped directly between the outer surface of the fork end 4 and the inner surface of the fixing nut 17 or indirectly through a conductive member such as a fixing nut washer 18. The plate-shaped sandwiching plate 50 that is directly or indirectly electrically connected to the hub shaft 16 via the pin 17 and the ground potential of the hub dynamo 5 that is electrically connected to the sandwiching plate 50 are provided. A grounding terminal 54 that supplies electric equipment such as the headlamp 9 and a positioning portion (described later) that is fixedly provided on the sandwiching plate 50 and positions the sandwiching plate 50 with respect to the fork end 4 are provided. .

  The sandwich plate 50 includes a base 55 whose basic shape is a substantially disc shape. A hub shaft holding hole 51 for penetrating and holding the hub shaft 16 is formed at substantially the center of the base portion 55. The hub shaft holding hole 51 forms a closed hole in plan view. In this example, the shape of the hub shaft holding hole 51 in plan view is substantially oval (or oval), and the clamping plate 50 extends in the longitudinal direction of the notch 40 of the fork end 44 while the hub shaft 16 is inserted. Is configured to move slightly.

  At one end of the sandwiching plate 50, that is, an end on the fork connecting portion 4a side when mounted on the fork end 4 (in this example, a position facing the engaging recess 45 provided on the fork end 4) A substantially rectangular columnar engaging projection 52 for engaging with the engaging recess 45 is erected toward the fork end 4 via an extending portion 56 extending from 55. The height of the engagement protrusion 52 is configured to be substantially the same as the thickness of the fork end 4 or slightly higher than the thickness of the fork end 4.

  With this configuration, the hub shaft 16 is inserted and held in the hub shaft holding hole 51 of the ground potential supply tool 6 arranged to overlap the outer surface of the fork end 4, and the ground potential supply tool 6 The engagement protrusion 52 and the engagement recess 45 of the fork end 4 can be deeply engaged over the entire depth of the engagement recess 45 (corresponding to the thickness of the fork end 4).

  For this reason, for example, when the fixing nut 17 is slightly loosened due to rough road traveling or the like, and it becomes difficult to fix the hub shaft 16 to the fork end 4 due to the clamping pressure between the fixing nut 17 and the lock nut 36. However, as long as the engagement between the engagement protrusion 52 of the ground potential supply tool 6 and the engagement recess 45 of the fork end 4 is maintained, the hub shaft inserted and held in the hub shaft holding hole 51 of the ground potential supply tool 6. 16 is suspended from the fork end 4 via the ground potential supply 6, and the front wheel 10 can be prevented from falling off the fork end 4. Thus, the ground potential supply tool 6 is configured to function also as a wheel dropout prevention fitting.

  The ground terminal 54 extends from the base portion 55 to an end portion in a direction substantially orthogonal to the one end of the sandwich plate 50 (the end portion in the direction in which the engagement protrusion 52 is provided as viewed from the center of the hub shaft holding hole 51). It is arranged through the extended portion 57 and the stepped portion 53 provided.

  As shown in FIG. 5B, the stepped portion 53 extends along the front edge portion 4 c or the rear edge portion 4 d (the front edge portion 4 c in this example) of the fork end 4 when the ground potential supply tool 6 is attached to the fork end 4. It is formed in a shape (in this example, a flat shape extending from the outer surface to the inner surface of the fork end 4 along the front edge portion 4c). The ground terminal 54 is fixed to the sandwiching plate 50 via a stepped portion 53 so as to be substantially parallel to the sandwiching plate 50 with a difference in level. The ground terminal 54 has a substantially rectangular shape in plan view and is configured to have substantially the same thickness as the power supply terminal 34 of the hub dynamo 5.

  The height of the stepped portion 53 (the dimension in the direction orthogonal to the surface of the sandwiching plate 50) is substantially the same as the thickness of the fork end 4. Therefore, the ground terminal 54 is arranged at a position substantially flush with the inner side surface of the fork end 4.

  With this configuration, it is possible to prevent the ground terminal 54 from projecting outward from the outer surface of the fork end 4 to become a protrusion obstacle, and the relative position between the ground terminal 54 and the power terminal 34 (fork). The relative position in the direction perpendicular to the side surface of the end 4 can be made closer, and the ground wire 8 and the power supply wire 7 can be easily processed together.

  Further, the step portion 53 and the engagement protrusion 52 also function as a positioning portion that restricts relative rotation of the sandwiching plate 50 with respect to the fork end 4. That is, the ground potential supply tool 6 attached to the fork end 4 in a state where the center of rotation is regulated by the hub shaft 16 inserted through the hub shaft holding hole 51 has the positioning portion (that is, the engagement protrusion 52 and the step portion). 53) regulates the rotational movement about the rotation center.

  In this example, the earth potential supply tool 6 is formed by integrally forming an iron-based metal plate by pressing or the like, and the surface is electrically connected to the earth wire 8 from an electric device or an adjacent conductive member. Tin-lead alloy plating (solder plating) for improving the properties is applied.

  The wheel drop prevention metal fitting 46 shown in FIG. 6 does not include portions corresponding to the extended portion 57, the stepped portion 53, and the ground terminal 54 of the ground potential supply tool 6, and the ground potential supply tool 6 and the mirror surface target. Shape.

  7 and 8 are drawings for explaining a procedure for mounting the ground potential supply tool 6 to the bicycle 1. FIG. Before attaching the ground potential supply tool 6 to the bicycle 1, first, as shown in FIG. 3, the lock nuts 36 and 38 of the hub dynamo 5 are arranged between the inner side surfaces of the pair of fork ends 4 and 44. The hub shaft 16 is inserted into the notches 40 and 41 of the fork ends 4 and 44.

  FIG. 7 is a view of this state as viewed from the outer surface side of the fork end 4. The outer periphery of the hub shaft 16 is in contact with the bottom portion 42 of the notch 40 of the fork end 4, and the hub shaft 16 protrudes further outward (the front side of the drawing in the drawing) from the outer surface of the fork end 4.

  Next, as shown in FIG. 8, the ground potential supply tool 6 is set so that the hub shaft 16 protruding outward from the outer surface of the fork end 4 passes through the hub shaft holding hole 51 of the ground potential supply tool 6. Overlap the outer surface of the fork end 4. At this time, the engagement protrusion 52 and the stepped portion 53 of the ground potential supply tool 6 are engaged with the engagement recess 45 and the front edge portion 4c of the fork end 4, respectively.

  Next, as shown in FIG. 2, a fixing nut washer 18 is attached to the hub shaft 16 so as to overlap the outer surface of the clamping plate 50 of the ground potential supply tool 6, and finally, the fixing nut 17 is attached to the hub shaft 16. Screw in and tighten. As a result, the fork end 4, the ground potential supply tool 6, and the fixing nut washer 18 are sandwiched between the lock nut 36 fixed to the hub shaft 16 of the hub dynamo 5 and the fixing nut 17. As a result, the hub shaft 16 is fixed to the fork end 4, and the hub shaft 16 and the ground potential supply tool 6 are electrically connected.

  Before the hub nut 16 is fixed to the fork end 4 by tightening the fixing nut 17, the rotation angle (fixed angle) of the hub shaft 16 with respect to the fork end 4 is adjusted to be fixed to the hub shaft 16. The relationship between the rotational position formed by the power supply terminal 34 and the ground terminal 54 fixed to the fork end 4 can be arbitrarily adjusted. In this way, the ground potential supply tool 6 can be attached to the bicycle 1.

  In the same manner, a fork end 44, a wheel drop-off prevention metal fitting 46, and a fixing nut washer 48 are sandwiched between the lock nut 38 and the fixing nut 47 on the other side of the hub dynamo 5, and thereby the hub shaft 16 is attached. The fork end 44 can be fixed (see FIG. 3).

  When the ground potential of the hub shaft 16 of the hub dynamo 5 is supplied to the bicycle frame via the fork end 4, such as when the surface of the fork end 4 has conductivity, that is, the hub dynamo 5 is 1 When used as a wire-type hub dynamo, a wheel drop-off prevention fitting (not shown) similar to the wheel drop-off prevention fitting 46 (that is, substantially mirrored) is also mounted on the fork end 4 side. There are many cases.

  In such a case, for example, in order to additionally use an electric device for which the ground potential must be input through an external wiring, the wheel drop-off prevention metal fitting 46 on the fork end 44 side is left as it is, and the fork end 4 side is left as it is. Only the wheel drop-off prevention fitting may be replaced with the ground potential supply tool 6.

  Since this replacement work requires only attaching and detaching the fixing nut 17 on one side and the washer 18 for the fixing nut, the one-wire hub dynamo can be easily used as the two-wire hub dynamo without removing the front wheel 10. be able to.

  Moreover, since the earth potential supply tool 6 also functions as a wheel drop-off prevention fitting, the one-wire hub dynamo can be made into two wires while ensuring safety at a low cost and in a compact manner.

  In the above-described embodiment, the stepped portion 53 and the engaging protrusion 52 are described as examples of the positioning portion of the ground potential supply tool, but the positioning portion is not limited to this.

  FIG. 9 is a side view showing an earth potential supply device 106 that is an earth potential supply device for a hub dynamo according to another embodiment of the present invention. FIG. 10A is a view of the ground potential supply tool 106 of FIG. 9 as viewed from XA. FIG. 10B is a view of the ground potential supply tool 106 of FIG. 9 as viewed from XB. In the embodiment shown in FIG. 9, FIG. 10A and FIG. 10B, members / parts having the same functions as those in the embodiment shown in FIG. 1 to FIG. doing.

  As shown in FIGS. 9, 10A and 10B, in the ground potential supply device 106, the ground terminal 54 is provided with the engagement protrusion 52 as viewed from the one end of the sandwich plate 50 (from the center of the hub shaft holding hole 51). The end portion in the direction substantially perpendicular to the end portion in the direction formed is disposed through an extending portion 57 extending from the base portion 55.

  That is, as shown in FIG. 10B, the ground potential supply tool 106 is not provided with a portion corresponding to the stepped portion 53 in the ground potential supply tool 6 shown in FIG. Is fixed to the sandwiching plate 50 so as to be substantially flush with each other. Therefore, the ground terminal 54 is arranged at a position substantially flush with the outer surface of the fork end 4.

  In this embodiment, the engagement protrusion 52 that bears a part of the function as the wheel drop-off prevention metal fitting also functions as a positioning portion that positions the sandwich plate 50 with respect to the fork end 4.

  The rest of the configuration, operation, and effect of the ground potential supply tool 106 are the same as those of the ground potential supply tool 6.

  Further, in each of the above-described embodiments, the case where the ground potential supply tool also functions as a wheel drop-off prevention fitting has been described as an example, but the present invention is not limited to this.

  FIG. 11 is a side view showing an earth potential supply tool 206 which is an earth potential supply tool for a hub dynamo according to still another embodiment of the present invention. 12A is a view of the ground potential supply tool 206 of FIG. 11 as viewed from XIIA. FIG. 12B is a view of the ground potential supply tool 206 of FIG. 11 as seen from XIIB. In the embodiment shown in FIG. 11, FIG. 12A and FIG. 12B, members / parts having the same functions as those in the embodiment shown in FIG. 1 to FIG. 8 or the embodiment shown in FIG. The same reference numerals are given and the description is omitted.

  As shown in FIG. 11, FIG. 12A and FIG. 12B, in the ground potential supply tool 206, the outer peripheral shape of the sandwich plate 50 is substantially the same except for the extended portion 57 connected to the ground terminal 54 through the step portion 53. The outer peripheral shape of the disk-shaped base 55 remains the same. In other words, the ground potential supply tool 206 is not provided with an equivalent to the engaging protrusion 52 in the ground potential supply tool 6 shown in FIG. 5B. In this example, there is also no portion corresponding to the extended portion 56 following the engaging protrusion 52.

  As described above, the ground potential supply tool 206 is not provided with the engaging recess 45 (see FIG. 4) in the fork end 4 as shown in FIG. It is intended for mounting on a fork end that does not have a function as a wheel drop-off prevention fitting.

  In the ground potential supply tool 206, the step portion 53 for electrically connecting the sandwich plate 50 and the ground terminal 54 also functions as a positioning portion for positioning the sandwich plate 50 with respect to the fork end 4. To do.

  The other configurations, operations, and effects of the ground potential supply tool 206 are the same as those of the ground potential supply tool 6.

  Further, in each of the above-described embodiments, the engagement protrusion 52 (in the case of the ground potential supply tools 6, 106) that bears a part of the function as the wheel drop-off prevention metal fitting and / or the sandwich plate 50 and the ground terminal 54. As an example, the step portion 53 (in the case of the ground potential supply tools 6 and 206) for electrically connecting the two is also used as a positioning portion. However, the present invention is not limited to this.

  FIG. 13 is a side view showing an earth potential supply tool 306 which is a hub dynamo earth potential supply tool according to still another embodiment of the present invention. 14A is a view of the ground potential supply tool 306 of FIG. 13 as viewed from XIVA. FIG. 14B is a view of the ground potential supply tool 306 of FIG. 13 as viewed from XIVB. In the embodiment shown in FIGS. 13, 14A and 14B, the same functions as those of the embodiment shown in FIGS. 1 to 8, the embodiment shown in FIGS. 9 to 10B, or the embodiment shown in FIGS. Etc., the same reference numerals are given to members and parts having the same, and the description is omitted.

  As shown in FIGS. 13, 14A and 14B, in the ground potential supply tool 306, as in the case of the ground potential supply tool 106, what corresponds to the stepped portion 53 in the ground potential supply tool 6 shown in FIG. The ground terminal 54 is not provided and is fixed to the sandwiching plate 50 so as to be substantially flush with the sandwiching plate 50.

  Further, in the ground potential supply tool 306, as in the case of the ground potential supply tool 206, the one corresponding to the engaging protrusion 52 in the ground potential supply tool 6 shown in FIG. 5B is not provided.

  However, in the ground potential supply tool 306, a position different from the position where the ground terminal 54 is provided (in this example, substantially opposite to the end of the direction where the ground terminal 54 is provided as viewed from the center of the hub shaft holding hole 51). A substantially rectangular columnar engaging projection 352 for engaging with the fork end 4 via an extending portion 356 extending from the base portion 55, and standing toward the fork end 4 side. Yes.

  The inner surface 352a of the engaging protrusion 352 has a shape that follows the front edge 4c or the rear edge 4d (the rear edge 4d in this example) of the fork end 4 when the ground potential supply tool 306 is attached to the fork end 4 (this example is the rear edge 4d). In the example, it is formed in a flat shape extending from the outer surface to the inner surface of the fork end 4 along the rear edge 4d.

  The height of the engagement protrusion 352 is substantially the same as the thickness of the fork end 4 or slightly higher than the thickness of the fork end 4.

  With this configuration, the engagement protrusion 352 can be used as a positioning portion that restricts relative rotation of the sandwiching plate 50 with respect to the fork end 4. That is, the engagement protrusion 352 of the ground potential supply tool 306 has a function of a positioning unit exclusively.

  The other configurations, operations, and effects of the ground potential supply tool 306 are the same as those of the ground potential supply tools 6, 106, and 206.

Although the present invention has been described above as a preferred embodiment, the terminology has been used for description rather than limitation and departs from the scope and spirit of the present invention. Without departing from the scope of the appended claims. Also, while the above describes only some exemplary embodiments of the present invention in detail, those skilled in the art will recognize the exemplary implementations described above without departing from the novel teachings and advantages of the present invention. It will be readily appreciated that many variations in form are possible. Accordingly, all such modifications are intended to be included within the scope of the present invention.

4: Fork end 5: Hub dynamo 6: Ground potential supply 16: Hub shaft 17: Fixed nut 18: Washer for fixed nut 50: Clamp plate 52: Engagement protrusion (positioning part)
53: Step part (positioning part)
54: Earth terminal

Patent Applicant Ryuji Nakano Applicant Agent Patent Attorney Koichi Tagawa

Claims (3)

A hub dynamo ground potential supply for supplying a ground potential of a hub dynamo supplied to a hub shaft to an electrical device,
A clamp that is sandwiched between an outer surface of a fork end that supports the hub shaft and an inner surface of a fixing nut that fixes the hub shaft to the fork end, and is electrically connected to the hub shaft via the fixing nut. The landing plate,
An earth terminal provided to be electrically connected to the sandwich plate and supplying the earth potential of the hub dynamo to the electric device;
A positioning portion that is fixedly provided on the clamping plate and positions the clamping plate with respect to the fork end;
A ground dynamo for hub dynamo equipped with The ground dynamo for hub dynamo according to claim 1,
A hub shaft holding hole that is drilled in the sandwich plate and is inserted and held through the hub shaft;
An engagement protrusion which is erected on the fork end side of the sandwich plate and engages with an engagement recess provided on an outer surface of the fork end;
Characterized by comprising. A ground dynamo for hub dynamo according to any one of claims 1 to 2,
The hub dynamo;
A hub dynamo system with
The hub dynamo is
The hub shaft on which a stator having a power generation coil is fixedly mounted;
A hub body fixedly mounted with a rotor having a permanent magnet on an inner peripheral surface and rotatably supported by the hub shaft;
With
The ground potential is supplied to the hub shaft by electrically connecting one end of the power generation coil to the hub shaft, and the other end of the power generation coil is fixed to the hub shaft outside the hub body. Configured to supply a power supply potential to the power supply terminal by electrically connecting to the power supply terminal mounted
Hub dynamo system.

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