JP2012076645A - Vehicle speed detector of vehicle or rotor for vehicle speed detection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle speed detector or a rotor for vehicle speed detection configured to achieve weight-reduction of the rotor for vehicle speed detection and to prevent deflection of the rotor for vehicle speed detection.SOLUTION: The vehicle speed detector 20 of a vehicle is provided with the rotor 22 for vehicle speed detection having a plurality of detected parts 22b formed at an interval in a circumferential direction and a vehicle speed sensor 21 arranged to be opposed at gaps in a vehicle width direction to the detected parts 22b. A plurality of rotor attached parts 22a are formed at an interval in the circumferential direction on the outer peripheral end of the radial direction of the rotor 22, each rotor attached part 22a is attached to an attaching part 31a of a wheel 31 with common fixed members 41 together with each disk attached part 19a formed on the inner peripheral end of the radial direction of a brake disk 19 at an interval in the circumferential direction, and a reinforcing part 22d is formed between the adjacent rotor attached parts 22a on the rotor 22.

Description

  The present invention relates to a vehicle speed detecting device or a vehicle speed detecting rotor for detecting the rotational speed of a wheel.

  Some vehicles such as motorcycles are equipped with a vehicle speed detection device. The vehicle speed detection device arranges a vehicle speed sensor opposite to a vehicle speed detection rotor attached to a side surface of a rotating wheel with a gap in the vehicle width direction, and detects the vehicle speed by detecting the rotation speed of the vehicle speed detection rotor. This is to be detected (see Patent Document 1).

JP 2001-165949 A

  In general, the temperature of the brake disc that causes friction with the brake pad is higher than the temperature of the vehicle speed detection rotor. As a result, the thermal expansion amount of the brake disk tends to be larger than the thermal expansion amount of the vehicle speed detection rotor. Here, if the vehicle speed detection rotor and the brake disc are attached to the wheel by fastening them together, the vehicle speed detection rotor will be affected by the thermal expansion and contraction of the brake discs, May bend. When the vehicle speed detection rotor bends, the gap amount between the vehicle speed detection rotor and the vehicle speed sensor changes, which causes a problem that the vehicle speed cannot be detected accurately.

  Accordingly, an object of the present invention is to provide a vehicle speed detection rotor or a vehicle speed detection device that can prevent the vehicle speed detection rotor from bending even when the vehicle speed detection rotor is attached to a wheel together with a brake disk. .

  A first invention of the present application is a vehicle speed detection rotor in which a plurality of detected portions are formed at intervals in the circumferential direction, and a vehicle speed sensor disposed to face the detected portions with a gap in the vehicle width direction. A plurality of rotor attachment portions are formed at intervals in the circumferential direction at the outer peripheral end portion in the radial direction of the rotor, and each rotor attachment portion is Attached to the wheel mounting portion of the wheel by a common fixing member together with each disk mounting portion formed at intervals in the circumferential direction on the radially inner peripheral end portion of the brake disc, A reinforcing portion is formed between the adjacent rotor mounting portions.

  In the above configuration, the vehicle speed detection rotor is attached to the wheel by a fixing member common to the brake disk, so that the weight of the vehicle can be reduced by reducing the number of parts of the vehicle. In addition, since the reinforcing part is provided between the rotor mounting parts, the rigidity is concentrated on the part where bending easily occurs without increasing the plate thickness of the entire vehicle speed detection rotor or using a highly rigid material. It can be increased, and the bending of the vehicle speed detecting rotor can be effectively prevented.

The second invention preferably further comprises the following configuration.
(1) The reinforcing portion is formed by bending an outer peripheral edge in a radial direction of the rotor.
(2) A plurality of positioning projections that protrude inward in the radial direction and abut against the annular step portion of the wheel are formed on the inner peripheral end portion in the radial direction of the rotor at intervals in the circumferential direction. .
(3) In the configuration (2), the positioning protrusion is disposed between the rotor attached portions.

  According to the configuration (1), it is possible to increase the rigidity of a portion where bending is likely to occur even between the rotor mounted portions, and it is possible to effectively prevent the bending.

  According to the configuration (2), the mounting property and mounting accuracy of the vehicle speed detection rotor can be improved by the positioning protrusion. Further, the rigidity of the vehicle speed detecting rotor can be improved by the positioning protrusion.

  According to the configuration (3), the positioning protrusion is disposed between the rotor mounted portions, thereby further improving the mounting performance and mounting accuracy of the vehicle speed detecting rotor, and obtaining the rigidity improving effect of the vehicle speed detecting rotor. be able to.

  According to a second aspect of the present invention, in the vehicle speed detection rotor, a plurality of detected portions are formed at intervals in the circumferential direction, and a plurality of rotor attached portions are spaced in the circumferential direction at an outer peripheral end portion in the radial direction. Each of the rotor attachment portions is attached to a wheel attachment portion of a wheel by a common fixing member together with a disc attachment portion of a brake disk, and a reinforcing portion is provided between adjacent rotor attachment portions. Is formed.

  In the above-described configuration, the vehicle speed detection rotor is attached to the wheel by a fixing member common to the brake disk, thereby reducing the number of parts of the vehicle and achieving weight reduction. In addition, since the reinforcing part is provided between the rotor mounting parts, the rigidity is concentrated on the part where bending easily occurs without increasing the plate thickness of the entire vehicle speed detection rotor or using a highly rigid material. It can be increased, and the bending of the vehicle speed detecting rotor can be effectively prevented.

  In short, according to the present invention, it is possible to provide a vehicle speed detection device or a vehicle speed detection rotor that can achieve a reduction in the weight of a vehicle and can further prevent the vehicle speed detection rotor from being bent.

1 is a right side view of a motorcycle according to an embodiment of the present invention. Fig. 2 is a right side view of a rear wheel portion of the motorcycle shown in Fig. 1. FIG. 3 is an enlarged view of a vehicle speed detection device portion of FIG. 2. It is a single figure of the rotor for vehicle speed detection. It is VV sectional drawing of FIG. It is a disassembled perspective view of a wheel, a brake disc, and a vehicle speed detecting rotor.

  FIG. 1 is a right side view of a motorcycle 1 according to an embodiment of the present invention. As shown in FIG. 1, the motorcycle 1 includes a front wheel 2 and a rear wheel 3, and the front wheel 2 is rotatably supported by a lower portion of a front fork 4 extending substantially in the vertical direction. The front fork 4 is supported by the steering shaft 5. The steering shaft 5 is rotatably supported by the head pipe 6. A bar-type steering handle 7 extending left and right is attached to an upper bracket (not shown) provided at the upper end of the front fork 4. Accordingly, when the driver swings the steering handle 7 to the left and right, the front wheels 2 are steered with the steering shaft 5 as the rotation axis.

  The vehicle body frame 8 extends rearward from the head pipe 6. A front end portion of a swing arm 9 is pivotally supported by a pivot bolt 10 at a rear lower end portion of the body frame 8, and a rear wheel 3 is rotatably supported at the rear end portion of the swing arm 9. A fuel tank 11 is disposed above the body frame 8 and behind the steering handle 7, and a driver seat 12 is disposed behind the fuel tank 11. An engine 13 is mounted below the fuel tank 11. An output sprocket (not shown) is disposed at the rear of the engine 13, and the power of the output sprocket is transmitted to the rear wheel 3 through the chain 14.

  A headlamp 16 is disposed in front of the steering handle 7, and the headlamp 16 is covered with a front cowl 17. The front cowl 17 is a full cowl type in which the upper part covers the headlamp 16 and the lower part covers the engine 13 and the like.

  FIG. 2 is a right side view of the rear wheel 3 portion of the motorcycle 1 of FIG. As shown in FIG. 2, the swing arm 9 is pivotally supported by the body frame 8 as a pair of left and right. A rear wheel 3 is disposed between the pair of left and right swing arms 9, and the rear wheel 3 is supported on the swing arm 9 by a rear axle 18. The rear wheel 3 includes a wheel 31 and a tire 32 attached to the outer periphery of the wheel 31. A rear wheel brake disc 19 is attached to a side surface of the wheel 31. A vehicle speed detection device 20 having a vehicle speed sensor 21 and a vehicle speed detection rotor 22 is disposed on the side surface of the wheel 31. The brake disc 19 is sandwiched from both sides by brake pads built in the brake caliper 40 so that the brake is applied.

  FIG. 3 is an enlarged view of the portion of the vehicle speed detection device 20 of FIG. As shown in FIG. 3, in the vehicle speed detection rotor 22, the main body portion 220 has an annular thin plate shape with a thickness (lateral direction length) of about 1.6 mm, and the main body portion 220 penetrates as a detected portion. About 50 holes 22b are provided at substantially equal intervals in the circumferential direction. The vehicle speed sensor 21 is provided so as to face the through hole 22b of the vehicle speed detection rotor 22, and a gap (lateral distance) between the vehicle speed sensor 21 and the vehicle speed detection rotor 22 is about 1 mm. In the present embodiment, the vehicle speed sensor 21 is a magnetic sensor. When the through hole 22b is detected, the vehicle speed sensor 21 is in a hole detection state, and the flat portion 22b1 between the through holes 22b is in a hole non-detection state. The rotation speed of the vehicle speed detection rotor 22, that is, the vehicle speed can be detected by counting the detected hole detection states. The form of the detected part is not limited to the through hole 22b, and any form that can be detected by the vehicle speed sensor 21, such as a notch or a recess, may be used.

  As shown in FIG. 3, the brake disk 19 has a main body portion 220 having an annular plate shape with a thickness of about 5 mm, and includes a plurality of insertion holes at substantially intervals in the circumferential direction. The brake disc 19 has a larger thickness than the vehicle speed detection rotor 22 and is formed with high rigidity. The insertion hole is formed for the purpose of improving heat dissipation and reducing the weight. A plurality of (four in the present embodiment) disk mounting portions 19 a are arranged radially inward from the main body 220 at the radially inner peripheral end of the main body 220 of the brake disk 19 at equal intervals in the circumferential direction. It is formed so as to protrude in the direction. A hole for inserting a fixing member is formed in the disk attachment portion 19a. A plurality of (four in the present embodiment) rotor attached portions 22 a are spaced from the main body portion 220 at equal intervals in the circumferential direction at the radially outer end of the main body portion 220 of the vehicle speed detecting rotor 22. It is formed so as to protrude outward in the radial direction. A hole for inserting the fixing member is formed in the rotor attached portion 22a. Each rotor attached portion 22a is attached to the wheel 31 by a fixing member 41 together with each disk attached portion 19a. Specifically, the disc mounting portion 19a and the rotor mounting portion 22a are arranged such that the brake disc 19 and the vehicle speed detecting rotor 22 are overlapped so that the central axes of the main body portions 220 are coaxial. It is set to be in a state where they are overlapped with each other, and the center axis of the fixing member insertion hole formed in each is set to be coaxial. Similarly, a fixing member fixing hole is formed in the wheel 31 at a position corresponding to the fixing member insertion hole in a state where the wheel 31 is overlapped with the main body 220 of the brake disk 19 so as to be coaxial.

  The fixing member is fixed to the wheel 31 with the fixing member insertion hole of the brake disk 19 and the fixing member insertion hole of the vehicle speed detection rotor 22 inserted, so that the brake disk 19 and the vehicle speed detection rotor 22 are fixed. Are fixed to the wheel 31. The fixing member is realized by a fastening member such as a bolt, and is used to press and hold the brake disc 19 and the vehicle speed detecting rotor 22 against the wheel 31. When the vehicle speed detection device 20 is mounted on the motorcycle 1 in this manner, the disk attached portion 19a and the rotor attached portion 22a are pressed against each other around the hole for inserting the fixed member by the fixing member. Maintained.

  FIG. 4 is a single view of the vehicle speed detection rotor 22. The vehicle speed detecting rotor 22 includes a main body 220 in which a through hole 22b is formed, the rotor attached portion 22a described above, and a positioning projection 22c. Three or more positioning protrusions 22c are spaced from the inner circumferential end of the main body 220 in the circumferential direction at intervals in the circumferential direction (four at equal intervals in the present embodiment), and project radially inward from the main body 220. It is formed to do. Each positioning protrusion 22c is formed at a positioning distance in which a radial distance connecting the distal end portion on the radially inner side and the central axis of the main body portion 220 is determined in advance. In the present embodiment, each positioning protrusion 22 c has an inner peripheral surface formed in an arc shape, and the circular arc extends along the peripheral surface of a virtual cylinder centering on the central axis of the main body 220.

  FIG. 6 is an exploded perspective view of the wheel 31, the brake disk 19, and the vehicle speed detection rotor 22. The wheel 31 is formed with an annular step 31c on which an outer peripheral surface having a radius of the positioning distance from the central axis is formed. As a result, the inner peripheral surface of each positioning protrusion 22c and the outer peripheral surface of the annular step portion 31c come into contact with each other, so that the vehicle speed detecting rotor 22 is positioned so that the central axis of the main body 220 is coaxial with the wheel 31. It will be. In the present embodiment, the positioning protrusion 22c is disposed between the rotor attached portions 22a. Specifically, it is formed in the central portion between the rotor attached portions 22a, and between the raised portion where the protruding amount in the radial direction increases as it approaches the vicinity of the central position between the rotor attached portions 22a, and the raised portions at both ends. And a positioning portion that is formed to form the inner peripheral surface. By forming the raised portion, stress concentration can be prevented and the portion contributing to the reinforcement of the rotor can be increased.

  The through-hole 22b formed in the main body 220 is provided between the rotor attached portion 22a and the positioning projection 22c in the radial direction. The plate thickness of the rotor attached portion 22a, the main body portion 220, and the positioning projection 22c is substantially the same, and both side surfaces are substantially the same plane.

  5 is a cross-sectional view taken along the line VV in FIG. Between the adjacent rotor attached portions 22a, reinforcing ribs 22d serving as reinforcing portions are formed by bending the outer peripheral edge of the vehicle speed detecting rotor 22 as shown in FIG. In other words, the outer peripheral end in the radial direction of the main body 220 is the entire region (between adjacent rotor attached portions 22a) except for the rotor attached portion 22a, and the main body portion is spaced apart in the circumferential direction. Reinforcing ribs 22d are formed so as to protrude radially outward from 220. The reinforcing rib 22d is formed by being bent from the main body 220 so as to be separated from the main body 220 in the radial direction and away from the main body 220 in the thickness direction. The plate thickness of the reinforcing rib 22d itself is set substantially the same as the plate thickness of the main body 220. The bending direction of the reinforcing rib 22d is side inward (wheel 31 side), and the bending angle θ1 is about 45 °. As shown in FIG. 4, the rotor attached portion 22a and the reinforcing rib 22d are continuous so that the boundary A is smooth. The angle θ2 at the boundary A is about 150 °. The range of the reinforcing rib 22d is about 40 ° when indicated by an angle θ3 from the rotor center O1. The reinforcing rib 22d has a smaller amount of bending at the end in the circumferential direction of the reinforcing rib 22d (in the vicinity of the rotor attached portion 22a) than in the central portion in the circumferential direction of the reinforcing rib 22d. That is, the reinforcing rib 22d is configured such that the amount of bending gradually increases from the circumferential end to the circumferential central portion in the vicinity of the boundary. In the region closer to the center in the circumferential direction than the vicinity of the boundary, the radial width dimension and the bending angle are uniform. In the state where the brake disk 19 and the vehicle speed detecting rotor 22 are coaxially overlapped and the hole of the disk attached portion 19a and the hole of the rotor attached portion 22a are positioned coaxially, the reinforcing rib 22d is The mounting portion 19a is formed except for a region overlapping the vehicle speed detection rotor 22, and is disposed in a space between the adjacent disk mounted portions 19a. This prevents the reinforcing rib 22d and the brake disc 19 from interfering with each other.

  The attachment of the brake disk 19 and the vehicle speed detection rotor 22 to the wheel 31 will be described more specifically with reference to FIG. As shown in FIG. 6, the wheel 31 has the same number of mounting portions 31 a as the disk mounting portions 19 a and the rotor mounting portions 22 a, at the outer peripheral end portion of the hub portion 31 b, and spaced laterally. It is formed so as to protrude outward. The fixing member 41 is a screw, and the screw hole formed in the attachment portion 31a through the hole formed in the rotor attachment portion 22a and the hole formed in the disk attachment portion 19a in order from the side outward. The brake disc 19 and the vehicle speed detecting rotor 22 are attached to the wheel 31 in order from the side inward.

  According to the vehicle speed detection device 20 or the vehicle speed detection rotor 22 configured as described above, the following effects can be exhibited.

(1) Since the vehicle speed detection rotor 22 is attached to the wheel 31 by the fixing member 41 common to the brake disk 19, the number of parts can be reduced as compared with the case where it is separately attached to the wheel 31, and the motorcycle 1 is lighter. Can be achieved. Further, since the reinforcing rib 22d is provided between the rotor attached portions 22a, the rigidity of the vehicle speed detecting rotor 22 can be improved, and the bending of the vehicle speed detecting rotor 22 can be prevented.

  Specifically, frictional heat is generated between the pad and the disk during braking, so that the brake disk 19 is thermally expanded. Thereafter, thermal shrinkage occurs with respect to the expanded state as the temperature decreases. In this way, thermal expansion and thermal contraction of the brake disk 19 are repeated. The brake disc 19 has higher rigidity than the vehicle speed detection rotor 22, and the brake disc 19 and the vehicle speed detection rotor 22 are fixed in surface contact with each other by the disk attached portion 19a and the rotor attached portion 22a. Along with the volume change of the brake disc 19 due to the change, tensile stress and compressive stress are generated in the rotor attached portion 22a. When such stress is generated in the rotor attached portion 22a, the rotor attached portion 22a is easily bent.

  In the present embodiment, the reinforcing ribs 22d reinforce between the rotor attached portions 22a that are likely to be distorted in this way, without increasing the overall plate thickness of the vehicle speed detecting rotor 22 or using a highly rigid material. The rigidity can be intensively increased at a portion where bending is likely to occur. As a result, the vehicle speed detection rotor 22 can be reduced in weight as compared with the case where the thickness of the entire vehicle speed detection rotor 22 is increased. In addition, compared to the case of using a material having high rigidity, the range of material selection can be widened, and an inexpensive material can be used. Further, by reinforcing the portions that are likely to bend intensively, the thickness of the portion that is less likely to bend (rotor attached portion 22a) and the portion that is prevented from being bent by the reinforcing rib 22d (main body portion 220) is reduced. be able to. By reducing the plate thickness in this way, it is possible to reduce the weight of the vehicle speed detection rotor 22 while preventing bending.

(2) Since the reinforcing rib 22d is formed by bending the outer peripheral edge in the radial direction of the vehicle speed detecting rotor 22, the rigidity is increased particularly in the portion between the rotor attached portions 22a where bending is likely to occur. It is possible to increase the bending prevention effect. Further, the vehicle speed detecting rotor 22 is lighter than the case where the reinforcing edge is formed by bending the outer peripheral edge in the radial direction of the vehicle speed detecting rotor 22 to form the reinforcing rib 22d. Can be achieved. Further, the vehicle speed detecting rotor 22 of the present embodiment can be easily formed by pressing a plate material having a constant thickness.

(3) Since the reinforcing rib 22d is bent sideways inward (opposite to the vehicle speed sensor 21), it prevents interference with the vehicle speed sensor 21 arranged radially outward of the vehicle speed detection rotor 22. be able to. Further, since the bending angle of the reinforcing rib 22d is about 45 °, an increase in the thickness (lateral length) of the vehicle speed detecting rotor 22 is achieved while achieving improvement in the rigidity of the vehicle speed detecting rotor 22d by bending. Can be small. Further, since a space is formed between the disc mounted portions 19a, interference between the brake disc 19 and the reinforcing rib 22d can be prevented.

(4) Since the reinforcing rib 22d is gradually bent from the circumferential end toward the central portion in the circumferential direction, a portion that can be bent without difficulty can be formed, and stress concentration can be reduced. This can be prevented, and the necessary strength can be obtained at the central portion in the circumferential direction.

(5) A plurality of positioning projections 22c that protrude inward in the radial direction and abut on the annular step portion 31c of the wheel 31 are spaced apart in the circumferential direction at the radially inner peripheral end of the vehicle speed detection rotor 22. Therefore, when the vehicle speed detecting rotor 22 is attached to the wheel 31, the positioning protrusion 22c comes into contact with the annular step portion 31c. Accordingly, the vehicle speed detecting rotor 22 is positioned and held with respect to the wheel 31 by the positioning projection 22c and the annular step portion 31c, so that the mountability and mounting accuracy of the vehicle speed detecting rotor 22 to the wheel 31 are maintained. Can be improved. Furthermore, since the positioning protrusion 22c is in surface contact with the wheel 31, the vehicle speed detecting rotor 22 can be prevented from bending inward in the radial direction.

(6) By providing the positioning projection 22c at the radially inner peripheral end of the vehicle speed detecting rotor 22, the rigidity of the vehicle speed detecting rotor 22 can be further improved in addition to the effect of the reinforcing rib 22d.

(7) Since the positioning protrusions 22c are disposed between the rotor attached portions 22a, the rigidity of the vehicle speed detection rotor can be improved, in addition to further improving the attachment performance and accuracy of the vehicle speed detection rotor 22 to the wheel 31. Can be obtained. Further, since the positioning protrusion 22c is disposed between the rotor attached portions 22a, the positioning protrusion 22c can be formed without being affected by the shape of the rotor attached portion 22a.

(8) Since the rotor attached portion 22a is formed on the radially outer peripheral end of the vehicle speed detecting rotor 22 so as to protrude radially outward, the through hole 22b is formed more radially outward. can do. As a result, the circumferential interval between the through holes 22b can be increased, and the detection accuracy of the through holes 22b by the vehicle speed sensor 22 can be improved. Further, by increasing the circumferential interval between the through holes 22b, it is possible to improve the manufacturability of the through holes 22b and the degree of freedom of arrangement of the vehicle speed sensor 21.

(9) Since the attachment portion 31a is formed so as to protrude laterally outward, and the screw hole is formed in the attachment portion 31a, the screw as the fixing member 41 protrudes laterally outward from the vehicle speed detection rotor 22. The length to be made can be shortened.

(10) Since the detected portion of the vehicle speed detecting rotor 22 detected by the vehicle speed sensor 21 is the through hole 22b, the detected portion can be formed with a simple configuration.

(11) Since the vehicle speed detection rotor 22 is disposed laterally outward (vehicle speed sensor 21 side) with respect to the brake disc 19, the arrangement of the vehicle speed sensor 21 for detecting the through hole 22b of the vehicle speed detection rotor 22 is provided. Can be made easy.

(Other embodiments)
In this embodiment, the reinforcing rib 22d is formed by bending the outer circumferential edge of the vehicle speed detecting rotor 22 in the radial direction. However, as another embodiment, the reinforcing rib is formed in the radial direction of the vehicle speed detecting rotor 22. The inner peripheral edge may be bent. In this case, even if the positioning projection 22c has a function as a reinforcing rib, the positioning projection 22c is bent or formed to have a larger thickness (length in the lateral direction) than the other portions. good. Further, reinforcing ribs may be formed on both the outer peripheral edge and the inner peripheral edge in the radial direction of the vehicle speed detecting rotor 22.

  In the present embodiment, since the reinforcing rib 22d is formed on the outer peripheral edge in the radial direction of the vehicle speed detecting rotor 22, the reinforcing rib 22d does not interfere with the positioning protrusion 22c formed on the inner peripheral edge. . Therefore, the design freedom of the reinforcing ribs 22d can be improved, and the vehicle speed detecting rotor 22 can be effectively reinforced by providing the reinforcing ribs 22d that are easily deformed as outer peripheral edges.

  On the other hand, when the reinforcing rib is formed on the inner peripheral edge in the radial direction of the rotor 22 for detecting the vehicle speed, the area of the inner peripheral edge is smaller than the area of the outer peripheral edge compared to the case where the reinforcing rib is formed on the outer peripheral edge. Therefore, the weight of the vehicle speed detecting rotor 22 can be reduced. In addition, if reinforcing ribs are formed on both the outer peripheral edge and the inner peripheral edge in the radial direction of the vehicle speed detection rotor 22, the rigidity of the vehicle speed detection rotor 22 can be further improved, and bending can be prevented.

  In the present embodiment, the reinforcing rib 22d is formed by being bent inward and laterally. However, as another embodiment, the reinforcing rib is thicker between the rotor attached portions 22a than the other portions. You may form so that (side direction length) may become large. In this case, the rigidity of the vehicle speed detection rotor can be further improved without increasing the vehicle speed detection rotor 22 in the radial direction. As described above, the reinforcing portion is not limited to the bent shape, and may be any as long as it has a function to reinforce between the attached portions as compared with the remaining portion. For example, although it is effective to increase the rigidity by bending, even if the radial width dimension or material between the rotor attached portions 22a is partially different from that in the vicinity of the rotor attached portion 22a, the rigidity can be increased. good.

  In the present embodiment, the reinforcing rib 22d is disposed in the entire region except the rotor attached portion 22a, but is disposed only in a portion (for example, the central portion) where bending is likely to occur among the rotor attached portions 22a. This includes cases where

  In the present embodiment, the present invention can be suitably applied to a vehicle equipped with an anti-braking system (ABS) that needs to detect the vehicle speed of the rear wheels, but the present invention can also be applied to a vehicle not equipped with an ABS. In addition, the present invention is preferably provided as a vehicle speed detection device for the rear wheel 3 in which the brake disk 19 has a large thermal deformation, but may be provided on the front wheel 2 and can be widely applied to vehicles having wheels for detecting the vehicle speed.

  Various modifications and changes can be made without departing from the spirit and scope of the invention as set forth in the appended claims.

  In the vehicle speed detection device or the vehicle speed detection rotor according to the present invention, the vehicle speed detection rotor can be prevented from being bent, and thus has great industrial utility value.

DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Front wheel 3 Rear wheel 4 Front fork 5 Steering shaft 6 Head pipe 7 Steering handle 8 Car body frame 9 Swing arm 10 Pivot bolt 11 Fuel tank 12 Seat 13 Engine 14 Crank case 15 Gear case 16 Head lamp 17 Front cowl 18 Rear axle
DESCRIPTION OF SYMBOLS 19 Brake disc 19a Disc attachment part 20 Vehicle speed detection device 21 Vehicle speed sensor 22 Vehicle speed detection rotor 220 Main body part 22a Rotor attachment part 22b Through hole 22c Positioning protrusion 22d Reinforcement rib 31 Wheel 31a Attachment part 31b Hub part 31c Annular step part 41 Fixed member

Claims (5)

A vehicle speed detection rotor having a plurality of detected portions formed at intervals in the circumferential direction, and a vehicle speed sensor disposed opposite to the detected portions with a gap in the vehicle width direction. In the vehicle speed detection device,
A plurality of rotor attachment portions are formed at intervals in the circumferential direction on the outer peripheral end portion in the radial direction of the rotor,
Each rotor attached portion is formed on the inner peripheral end portion in the radial direction of the brake disc at intervals in the circumferential direction, together with each disc attached portion, to the wheel attaching portion of the wheel by a common fixing member. Attached,
The vehicle speed detecting device for a vehicle, wherein a reinforcing portion is formed between adjacent rotor mounted portions on the rotor.
The vehicle speed detection device for a vehicle according to claim 1, wherein the reinforcing portion is formed by bending an outer peripheral edge in a radial direction of the rotor.
A plurality of positioning projections that protrude inward in the radial direction and abut against the annular stepped portion of the wheel are formed at an interval in the circumferential direction at an inner peripheral end portion in the radial direction of the rotor. The vehicle speed detection device for a vehicle according to 1 or 2.
The vehicle speed detection device for a vehicle according to claim 3, wherein the positioning protrusion is disposed between the rotor attached portions.
A plurality of detected parts are formed at intervals in the circumferential direction,
A plurality of rotor mounting portions are formed at intervals in the circumferential direction at the radially outer end.
Each rotor attached portion is attached to the wheel attaching portion of the wheel by a common fixing member together with the disc attached portion of the brake disc,
A vehicle speed detecting rotor for a vehicle, wherein a reinforcing portion is formed between adjacent rotor mounting portions.

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