JP2015047888A - Vehicle speed detection device of vehicle, and bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle speed detection device capable of preventing a holding member from accidentally coming off a wheel even if a spoke of the wheel is bent or broken.SOLUTION: The vehicle speed detection device has: a holding member 31 which is freely rotatable together with a wheel having a hub 17 at a central part and includes a magnetism generator 30; and a detection body 32 which detects magnetism of the magnetism generator 30. The holding member 31 has: a first holding body 34 including the magnetism generator 30; and a second holding body 35 which opposes an inner side D1 of the first holding body 34. A first clamping part 39 of the first holding body 34 and a second clamping part 52 of the second holding body 35 oppose to each other in an axial direction A, and a flange 23 of the hub 17 is clamped between a first clamping part 39 and a second clamping part 52 in the axial direction A, and the first holding body 34 and the second holding body 35 are connected by a connection member 56.

Description

  The present invention relates to a vehicle speed detection device for a vehicle and a bicycle including the vehicle speed detection device.

  2. Description of the Related Art Conventionally, as a vehicle speed detection device that detects a vehicle speed of a bicycle or the like, there is a system that detects the magnetism of a plurality of magnets that rotate together with a front wheel and obtains a traveling speed based on this. The plurality of magnets are provided on the holding member. The holding member is attached to the outside of the spoke of the front wheel in the axial direction of the axle of the front wheel. A magnetic detection device for detecting the magnetism of the magnet is fixed to the front fork.

  The holding member is attached to the spoke by a fixing bracket and a bolt. The fixed bracket is disposed inside the spoke in the axial direction of the axle, and is connected to the holding member by a bolt. Thereby, a plurality of spokes are clamped between the holding member and the fixing bracket, and the holding member is fixed to the plurality of spokes.

  Note that a vehicle speed detection device having an attachment structure for sandwiching a plurality of spokes between a holding member and a fixed bracket as described above is described in, for example, Patent Document 1 below.

JP 2010-179877

  However, in the conventional type vehicle speed detection device, since the holding member is attached to the spoke of the front wheel, the bicycle falls down or the front wheel collides with an obstacle or the like so that the spoke is bent or broken. In this case, an excessive force is generated in the attachment portion between the holding member and the spoke, the attachment portion is damaged, a part of the holding member is detached from the spoke, and the attachment of the holding member to the front wheel becomes incomplete. is there. In such a case, the holding member may vibrate abnormally when the front wheel rotates, and the vehicle speed detection accuracy may decrease.

  An object of the present invention is to provide a vehicle speed detection device and a bicycle that can prevent a holding member from being inadvertently detached from a wheel even if the spoke of the wheel is bent or broken. And

In order to achieve the above object, the first invention includes a holding member that is rotatable with a wheel having a hub in the center and includes a magnetic generator, and a detector that detects the magnetism of the magnetic generator. ,
A vehicle speed detection device for a vehicle in which a detection body is fixed to the vehicle body side,
The holding member has a first holding body provided with a magnetic generator, and a second holding body facing the inside of the first holding body in the axial direction of the axle,
The first holding body has a first clamping portion;
The second holding body has a second clamping portion;
The first clamping part and the second clamping part oppose each other in the axial direction of the axle;
The hub collar is sandwiched between the first clamping part and the second clamping part in the axial direction of the axle,
The first holding body and the second holding body are connected by a connecting member.

  According to this, the collar of the hub is sandwiched between the first clamping part and the second clamping part, and the first holding body and the second holding body are connected by the connecting member. Thereby, the holding member is attached to the flange of the hub, not the spoke of the wheel. Therefore, even if the spoke is bent or broken, the holding member does not come off from the flange of the hub, and the holding member can be prevented from being carelessly detached from the wheel.

Further, since the first clamping part and the second clamping part sandwich the flange of the hub from the axial direction of the axle, the holding member is positioned in the axial direction of the axle.
In the vehicle speed detection device for a vehicle in the second aspect of the invention, the first clamping unit has a positioning unit for positioning the first holding body in the radial direction of the wheel.

  According to this, the first holding body is positioned in the radial direction of the wheel by the positioning portion. For this reason, it can prevent that the attachment position of a holding member shifts | deviates to the radial direction of a wheel, and a holding member can be attached to the exact position in the radial direction of a wheel.

In the vehicle speed detection device according to the third aspect of the present invention, a plurality of first and second clamping portions are provided in the circumferential direction of the wheel,
The positioning part of each first clamping part is arranged so as to surround the outer peripheral edge of the flange of the hub from the outside in the radial direction of the wheel.

According to this, the first holding body is positioned in the radial direction of the wheel by the positioning portion of each first clamping portion coming into contact with the outer peripheral edge of the hub collar from the outside in the radial direction of the wheel.
In the vehicle speed detection device for a vehicle according to the fourth aspect of the present invention, a temporary fixing member for temporarily fixing the second holding body to the inside of the first holding body in the axial direction of the axle is provided on the first holding body.
The second holding body is detachable from the temporary fixing member.

  According to this, by engaging the second holding body with the temporary fixing member, the second holding body is temporarily fixed inside the first holding body via the temporary fixing member. Thus, the holding member can be easily attached to the flange of the hub by connecting the first holding body and the second holding body with the connecting member in a state where the second holding body is temporarily fixed.

  In the vehicle speed detection device for a vehicle according to the fifth aspect of the present invention, the first holding body is provided with a fixing member that fixes the first holding body in the circumferential direction with respect to the wheel so that the first holding body rotates integrally with the wheel. It is what has been.

According to this, since the 1st holding body rotates in unison with a wheel certainly and it can prevent that rotation of a holding member shifts to rotation of a wheel, a vehicle speed is detected accurately.
In the vehicle speed detection device for a vehicle in the sixth invention, the spokes of the wheels pass between the first holding body and the second holding body,
The fixing member has a pair of fixing claws,
The spoke fits between the pair of fixed claws.

According to this, when attaching the first holding body, the first holding body can be easily fixed in the circumferential direction with respect to the wheel by fitting the spoke between the pair of fixing claws.
A seventh aspect of the present invention is a bicycle including the vehicle speed detection device according to any one of the first to sixth aspects of the present invention.

  As described above, according to the present invention, even if the spokes of the wheel are bent or broken, it is possible to prevent the holding member from being inadvertently detached from the wheel.

1 is a side view of an electric bicycle according to an embodiment of the present invention. It is sectional drawing of the hub part of the front wheel of an electric bicycle. It is the perspective view which looked at the vehicle speed detection apparatus with which the electric bicycle was equipped from the outside (front side). It is the perspective view which looked at the vehicle speed detection apparatus with which the electric bicycle was equipped from the inner side (back side). It is the perspective view which looked at the vehicle speed detection apparatus with which the electric bicycle was equipped from the inner side (back side), and shows the state which removed the 2nd holding plate. It is the perspective view which looked at the hub and vehicle speed detection apparatus of the electric bicycle from the inside (back side). FIG. 2 is an exploded perspective view of a holding member of the vehicle speed detection device. It is the perspective view which looked at the 1st holding plate of the vehicle speed detection apparatus from the inner side (back side). FIG. 5 is an enlarged cross-sectional view showing a state in which the flange of the hub is sandwiched between first and second sandwiching pieces of the vehicle speed detection device. It is an enlarged sectional view of a fixing member of the vehicle speed detection device. It is the perspective view which looked at the 2nd holding plate of the vehicle speed detection apparatus from the inner side (back side). It is sectional drawing when the 2nd holding plate of a vehicle speed detection apparatus is temporarily fixed to the 1st holding plate similarly.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, reference numeral 1 denotes an electric bicycle as an example of a vehicle. The electric bicycle 1 transmits a pedal force of a vehicle body 2, a front wheel 3, a rear wheel 4, and a pedal 5 to the rear wheel 4. 6, an electric auxiliary drive device 7 that applies an auxiliary drive force to the chain 6, a vehicle speed detection device 8, and the like.

  The vehicle body 2 includes a frame body 10 and a front fork 11 provided at the front portion of the frame body 10. The front fork 11 has a pair of left and right fork legs 12 and a fork claw 13 (see FIGS. 2 and 3) provided at the lower end of the fork leg 12. In addition, the hawk claw 13 has a slit part (illustration omitted) by which the lower part was open | released. The frame body 10 includes a down pipe 10a, a standing pipe 10b, a back hawk 10c, a chain stay 10d, and the like.

  The front wheel 3 includes a tire 15, a rim 16 provided on the inner periphery of the tire 15, a hub 17 (see FIG. 2) provided in the center, an axle 18, and between the hub 17 and the rim 16. And a plurality of spokes 19 provided radially. As shown in FIG. 2, the hub 17 includes a cylindrical portion 21, a bearing housing portion 22 provided at both ends of the cylindrical portion 21, a pair of left and right flanges 23 formed on the outer periphery of the bearing housing portion 22, and a bearing housing. A plurality of spheres 24 housed in the portion 22, a ball press 25 for pressing the ball 24 into the bearing housing portion 22, and a lock nut 26 for tightening the ball press 25 toward the inner side D1 in the axial direction A of the axle 18. have.

  The axle 18 is inserted into the cylindrical portion 21, the ball push 25 and the lock nut 26 are screwed into the axle 18, and the sphere 24 is sandwiched between the bearing housing portion 22 and the ball push 25. As shown in FIG. 5, a plurality of locking holes 27 are formed in the collar 23, and the inner ends of the spokes 19 are locked in the locking holes 27.

  As shown in FIG. 2, both ends of the axle 18 are inserted into the slit portions of the fork claw 13, and the axle 18 is connected to the fork claw 13 by nuts 28 screwed to both ends of the axle 18. The front wheel 3 is attached to the front fork 11.

  As shown in FIGS. 2 and 3, the vehicle speed detection device 8 includes a plurality of magnets 30 (an example of a magnetic generator) and a holding member 31 that is rotatable together with the front wheels 3 and detection that detects the magnetism of the magnets 30. And a body 32. The holding member 31 includes a first holding plate 34 (an example of a first holding body) provided with a magnet 30 and a second holding plate 35 (second holding plate) facing the inner side D1 of the first holding plate 34 in the axial direction A. An example of a body).

  As shown in FIGS. 7 and 8, the first holding plate 34 is a disk-shaped resin member having an opening 36 in the center. The magnets 30 are inserted into the first holding plate 34 and are arranged at a plurality of locations in the circumferential direction B of the front wheel 3.

  The first holding plate 34 includes a plurality of boss portions 37, 46, a plurality of screw insertion holes 38, a plurality of first holding pieces 39 (an example of a first holding portion), and a second holding plate 35 in the axial direction. A plurality of temporary fixing members 40 (see FIG. 12) temporarily fixed to the inner side D1 of the first holding plate 34 in A, and the first holding plate 34 in front so that the first holding plate 34 rotates integrally with the front wheel 3. A plurality of fixing members 41 that are fixed to the wheel 3 in the circumferential direction B are provided.

  As shown in FIGS. 2 and 8, the boss portions 37 and 46 protrude toward the inner side D <b> 1 of the first holding plate 34 and are formed at a plurality of locations in the circumferential direction B. 2 It has receiving surfaces 37a and 46a for receiving the holding plate 35.

As shown in FIGS. 7 and 8, each screw insertion hole 38 is formed in each boss portion 37 and penetrates the inside D <b> 1 and the outside D <b> 2 of the first holding plate 34.
As shown in FIGS. 2, 8, and 9, each first clamping piece 39 is formed at a plurality of locations in the circumferential direction B around the opening 36, and faces the inner side D <b> 1 of the first holding plate 34. Protruding. Each first clamping piece 39 has a positioning claw 42 (an example of a positioning portion) that positions the first holding plate 34 in the radial direction C of the front wheel 3. Each positioning claw 42 is provided at the tip of the first clamping piece 39 and is arranged so as to surround the outer peripheral edge of the flange 23 of the hub 17 from the outside in the radial direction C.

As shown in FIGS. 2 and 8, each temporary fixing member 40 protrudes toward the inner side D <b> 1 of the first holding plate 34, is formed at a plurality of locations in the circumferential direction B, and has temporary fixing claws 45 at the tip. doing.
As shown in FIGS. 2, 8, and 10, each fixing member 41 is formed at a plurality of locations in the circumferential direction B and has a pair of fixing claws 41a and 41b. These fixing claws 41 a and 41 b are provided in each boss portion 46 and protrude toward the inner side D <b> 1 of the first holding plate 34.

  As shown in FIGS. 7 and 11, the second holding plate 35 is a C-shaped member in which a part of the ring is cut out, and the cutout portion 48 is formed larger than the outer diameter of the cylindrical portion 21 of the hub 17. ing. The second holding plate 35 has a plurality of screw holes 51, a plurality of second holding pieces 52 (an example of a second holding portion), a plurality of temporary fixing holes 53, and a plurality of fixing holes 54. ing.

  Each screw hole 51 is formed at a plurality of locations in the circumferential direction B, and has an internal thread on the inner periphery. Each of the second holding pieces 52 is formed at a plurality of locations in the circumferential direction B of the inner peripheral edge of the second holding plate 35 and protrudes toward the outer side D <b> 2 of the second holding plate 35. Each of the temporary fixing holes 53 and the fixing holes 54 is formed at a plurality of locations in the circumferential direction B, and penetrates the inner side D1 and the outer side D2 of the second holding plate 35.

  As shown in FIGS. 2 to 4 and 6, the first holding plate 34 and the second holding plate 35 are connected by a plurality of screws 56 (an example of a connecting member). Each screw 56 is inserted into the screw insertion hole 38 of the first holding plate 34 and screwed into the screw hole 51 of the second holding plate 35. In the state where the first holding plate 34 and the second holding plate 35 are connected, as shown in FIGS. 2 and 9, the first holding piece 39 and the second holding piece 52 face each other in the axial direction A, The flange 23 of the hub 17 is sandwiched between each first clamping piece 39 and each second clamping piece 52 in the axial direction A.

  The temporary claw 45 of the temporary fixing member 40 can be inserted into and removed from the temporary fixing hole 53 of the second holding plate 35 in the axial direction A. In the state where the first holding plate 34 and the second holding plate 35 are connected, as shown in FIG. 12, the temporary pawl 45 is inserted from the outer side D2 of the second holding plate 35 into the temporary fixing hole 53, and the inner side D1. Protruding.

  As shown in FIG. 10, the distal end portions of both the fixing claws 41 a and 41 b of the fixing member 41 can be inserted into and removed from the fixing hole 54 of the second holding plate 35 in the axial direction A. As shown in FIG. 6, in a state where the first holding plate 34 and the second holding plate 35 are connected, the distal ends of both the fixing claws 41 a and 41 b are inserted into the fixing holes 54 from the outside D 2 of the second holding plate 35. 4 and FIG. 10, the spoke 19 passes between the first holding plate 34 and the second holding plate 35 and fits between the two fixing claws 41a and 41b. Get stuck.

  As shown in FIGS. 2 and 3, the detection body 32 has a detection element such as a reed switch that detects magnetism, and is fixed to the front fork 11 (an example of a vehicle body) via a mounting plate 61. . That is, the detection body 32 is attached to the attachment plate 61, the attachment hole 61 is formed in the attachment plate 61, and one end portion of the axle 18 is inserted through the attachment hole 62. The mounting plate 61 is connected and fixed to one hawk leg 12 by being sandwiched between one hawk claw 13 and the nut 28.

Hereinafter, the operation of the above configuration will be described.
2 to 4, the flange 23 of the hub 17 is sandwiched between the first clamping piece 39 and the second clamping piece 52, and the first holding plate 34 and the second holding plate 35 are connected with screws 56. Link. As a result, the holding member 31 is attached not to the spoke 19 but to the flange 23 of the hub 17. Therefore, even if the spoke 19 is bent or broken, the holding member 31 is not detached from the flange 23, and the holding member 31 can be prevented from being carelessly detached from the front wheel 3. .

Further, since the first clamping piece 39 and the second clamping piece 52 sandwich the flange 23 from the axial direction A, the holding member 31 is positioned in the axial direction A.
Further, in the state where the holding member 31 is attached to the flange 23 as described above, the positioning claws 42 of the first holding pieces 39 abut on the outer peripheral edge of the flange 23 from the outside in the radial direction C as shown in FIG. Thus, the first holding plate 34 is positioned in the radial direction C. For this reason, the attachment position of the holding member 31 can be prevented from shifting in the radial direction C, and the holding member 31 can be attached to an accurate position in the radial direction C.

  When the electric bicycle 1 is running, as shown in FIG. 3, each magnet 30 of the holding member 31 rotates together with the front wheel 3, and the detection body 32 detects the magnetism of the magnet 30 passing by, The traveling speed of the electric bicycle 1 is detected.

  At this time, as shown in FIGS. 5 and 10, since the spoke 19 is fitted between the fixed claws 41a and 41b, the first holding plate 34 is reliably rotated with the front wheel 3, It is possible to prevent the rotation of the holding member 31 from being deviated from the rotation of the front wheel 3. Thereby, the vehicle speed is detected with high accuracy.

Further, the holding member 31 can be attached to the front wheel 3 in the following procedure with the front wheel 3 removed from the front fork 11.
That is, as shown in FIG. 12, first, one end of the axle 18 is inserted into the opening 36 of the first holding plate 34, the first holding plate 34 is attached to the outer side D2 of the spoke 19, and the spoke 19 is attached to both. While being fitted between the fixing claws 41 a and 41 b, the positioning claws 42 are fitted on the flanges 23 of the hub 17. Accordingly, the first holding plate 34 is held by the flange 23 and is fixed in the circumferential direction B with respect to the front wheel 3.

  Thereafter, the second holding plate 35 is inserted into the inside D1 of the spoke 19, the cylindrical portion 21 of the hub 17 is inserted into the cutout portion 48 of the second holding plate 35, and the temporary pawls 45 of the temporary fixing members 40 are secondly inserted. The fixing plate 41 is inserted into the temporary fixing holes 53 from the outer side D2 of the holding plate 35 and protrudes into the inner side D1 of the second holding plate 35, and the two fixing claws 41a and 41b of the fixing members 41 are secondly connected as shown in FIG. It is inserted into each fixing hole 54 of the holding plate 35. Thus, as shown in FIG. 12, the second holding plate 35 is engaged with each temporary fixing member 40 and temporarily fixed to the inner side D <b> 1 of the first holding plate 34 via each temporary fixing member 40.

  With the second holding plate 35 temporarily fixed in this way, the screw 56 is inserted into the screw insertion hole 38 and screwed into the screw hole 51 as shown in FIG. 2 Since the holding plate 35 is connected and the flange 23 of the hub 17 is sandwiched between the first holding piece 39 and the second holding piece 52, the holding member 31 can be easily attached to the flange 23 of the hub 17. it can. At this time, since the second holding plate 35 is received by the receiving surfaces 37a, 46a of the boss portions 37, 46, the second holding plate 35 is reliably connected to the first holding plate 34.

  Moreover, the holding member 31 can be easily removed from the front wheel 3 by performing the reverse procedure to the above. That is, if the screw 56 is removed, the second holding plate 35 is detached from each temporary fixing member 40 and separated from the first holding plate 34, the first holding plate 34 is removed from the flange 23 to the outside D2 of the front wheel 3. Good.

  In the above embodiment, as shown in FIG. 3, the detection body 32 is attached to the hawk leg 12 of the front fork 11 using the attachment plate 61, but without using the attachment plate 61, the detection body 32 is It may be attached directly to the hawk leg 12. Further, the mounting plate 61 may be formed integrally with the hawk leg 12.

  In the above embodiment, as shown in FIG. 1, the holding member 31 is provided on the front wheel 3, the mounting plate 61 including the detection body 32 is provided on the front fork 11, and the electric bicycle is calculated from the rotational speed of the front wheel 3. 1, the holding member 31 is provided on the rear wheel 4, the mounting plate 61 including the detection body 32 is provided on the back fork 10 c, and the electric bicycle 1 travels from the rotational speed of the rear wheel 4. You may ask for speed.

  In the above embodiment, as shown in FIG. 1, the electric bicycle 1 is used as an example of the vehicle. However, the electric bicycle 1 is not limited to the electric bicycle 1. For example, the electric bicycle 1 is generally not provided with the electric auxiliary drive device 7. It can be applied to a simple bicycle, a motorcycle, a wheelchair or the like.

  The vehicle speed detection device according to the present invention is suitable for detecting the traveling speed of a bicycle, but is also applicable to detecting the traveling speed of a vehicle other than a bicycle.

1 Electric bicycle (vehicle)
2 Body 3 Front wheel 8 Vehicle speed detection device 17 Hub 18 Axle 19 Spoke 23 鍔 30 Magnet (magnetic generator)
31 holding member 32 detector 34 first holding plate (first holding body)
35 Second holding plate (second holding body)
39 1st clamping piece (1st clamping part)
40 Temporary fixing member 41 Fixing members 41a and 41b Fixing claw 42 Positioning claw (positioning part)
52 2nd clamping piece (2nd clamping part)
56 Screw (connection member)
A Axial direction B Circumferential direction C Radial direction D1 Inside

Claims (7)

A holding member that is rotatable with a wheel having a hub in the center and includes a magnetic generator, and a detector that detects the magnetism of the magnetic generator;
A vehicle speed detection device for a vehicle in which a detection body is fixed to the vehicle body side,
The holding member has a first holding body provided with a magnetic generator, and a second holding body facing the inside of the first holding body in the axial direction of the axle,
The first holding body has a first clamping portion;
The second holding body has a second clamping portion;
The first clamping part and the second clamping part oppose each other in the axial direction of the axle;
The hub collar is sandwiched between the first clamping part and the second clamping part in the axial direction of the axle,
A vehicle speed detection device for a vehicle, wherein the first holding body and the second holding body are connected by a connecting member. The vehicle speed detection device according to claim 1, wherein the first clamping unit includes a positioning unit that positions the first holding body in the radial direction of the wheel. A plurality of first and second clamping portions are provided in the circumferential direction of the wheel,
The vehicle speed detection device for a vehicle according to claim 2, wherein the positioning portions of the first clamping portions are arranged so as to surround the outer peripheral edge of the hub collar from the outside in the radial direction of the wheel. A temporary holding member for temporarily fixing the second holding body to the inside of the first holding body in the axial direction of the axle is provided on the first holding body,
The vehicle speed detection device according to any one of claims 1 to 3, wherein the second holding body is detachably engageable with the temporary fixing member. The fixing member that fixes the first holding body in the circumferential direction with respect to the wheel so that the first holding body rotates integrally with the wheel is provided on the first holding body. The vehicle speed detection device for a vehicle according to claim 4. The spokes of the wheel pass between the first holding body and the second holding body,
The fixing member has a pair of fixing claws,
The vehicle speed detecting device for a vehicle according to claim 5, wherein the spoke is fitted between the pair of fixed claws. A bicycle comprising the vehicle speed detection device according to any one of claims 1 to 6.

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