JP4690124B2 - Speed detection device for motorcycles - Google Patents

Description

  The present invention relates to a vehicle speed detection device for a motorcycle.

  Some motorcycles include a brake device equipped with an ABS (anti-lock brake system). Generally, an ABS is a vehicle speed detection device that detects the rotational speed of a wheel, and a pressure adjustment device that adjusts the braking pressure of the brake. And. FIG. 6 is a rear sectional view of the front wheel according to the prior art. The vehicle speed detection device includes a sensor rotor 102 fixed to the front wheel wheel 101 and a sensor 104 fixed to the front fork 103 and detecting the rotation of the sensor rotor 102. And.

  The sensor rotor 102 is formed in a ring shape and has a large number of detection holes 109, and a plurality of attachment pieces 110 having attachment holes 111 formed projectingly inward in the radial direction. The sensor rotor 102 is fastened together with the brake disc 105 by a bolt 108 that fixes the brake disc 105 to the front wheel 101 through the mounting hole 111.

Shoko 58-37003

  The front fork 103 of a motorcycle is desired to have a distance (pitch) L from the vehicle width center O1 as small as possible. This is because the front fork 103 is provided with various brackets and the like for mounting components such as a fender and a caliper, and as the distance L increases, the size of the bracket and the like increases and the weight increases.

  However, conventionally, since the brake disc 105 and the sensor rotor 102 are fastened together by the same bolt 108, the head of the bolt 108 by the thickness of the sensor rotor 102 is compared with the case where only the brake disc 105 is bolted. Protrudes toward the front fork 103, making it difficult to bring the front fork 103 close to the vehicle width center O1.

  On the other hand, when the distance L of the front fork 103 is limited to a predetermined value, the gap t between the bolt 108 and the front fork 103 cannot be secured, so the sensor rotor 102 may not be fastened together with the brake disc 105.

  The present invention has been made in view of such a situation, and a sensor rotor can be attached so as to suppress protrusion of a bolt that fixes a brake disk to a wheel wheel. An object of the present invention is to provide a vehicle speed detection device for a motorcycle capable of ensuring a clearance.

According to a first aspect of the present invention, there is provided a vehicle speed detection device for a motorcycle, comprising: a sensor rotor capable of rotating integrally with a wheel wheel to which a brake disk is fixed; and a sensor for detecting rotation of the sensor rotor. The brake disk is fixed to the brake disk with a bolt, and the sensor rotor is fixed to the brake disk with a fixture, so that the wheel wheel and the sensor rotor can be rotated together. A wheel wheel fixing point for fixing a disc to the wheel wheel and a sensor rotor fixing point for fixing the sensor rotor to the brake disc are provided at different positions in the circumferential direction, and The sensor rotor is fixed to the sensor rotor. Fixing portion for fixing is provided to protrude in the radial direction, characterized in that.

  According to this, since the head of the bolt that fixes the brake disc to the wheel wheel does not protrude to the left and right as compared with the case where the sensor rotor is tightened together, a clearance between the bolt and the surrounding parts is secured. In addition, the part can be arranged close to the center of the vehicle width. When a rivet is used as a fixture for the sensor rotor with respect to the brake disk, the amount of protrusion of the fixture to the left and right outwards can be reduced.

Substantially the same According to a second aspect of the present invention, in the first aspect, a fixing portion for said wheel wheel, and a fixing portion for the sensor rotor, the same number, and, around the axis of the wheel wheel It is characterized by being provided at substantially equal intervals in the circumferential direction on the circumference.

According to this, it becomes possible to fix to a brake disk using the sensor rotor of the same shape as the conventional sensor rotor fastened together with a brake disk. In other words, the sensor rotor can be shared between the case where the sensor rotor is fastened together with the brake disc on the wheel and the case where the sensor rotor is fixed to the brake disc.

According to a third aspect of the invention, in the invention described in claim 2, wherein the fixing portion provided in the sensor rotor, a mounting piece formed with mounting holes for inserting the fastener, the mounting piece, said It is offset to the wheel wheel side in the axial direction of the wheel and is overlapped and attached to the wheel wheel side surface of the brake disc.

According to this, the protrusion amount to the left and right outward of the fixture can be further reduced.

  According to the present invention, the sensor rotor can be provided so as to suppress the protrusion of the bolt that fixes the brake disk to the wheel wheel, and a gap between the bolt and the surrounding components can be secured.

  FIG. 1 is a side view of a motorcycle according to an embodiment of the present invention. In this motorcycle 10, an engine 12 is disposed below the front part of the body frame 11, a fuel tank 13 is disposed above the front part, a driver seat 14 is disposed above the rear part, and a swing arm 15 is disposed below the rear part. is doing. A front fork 16 is rotatably provided on the head pipe 21 at the front end of the vehicle body frame 11, a handle 17 is provided at the upper end of the front fork 16, and a front wheel 18 is rotatably supported at the lower end. A rear wheel 19 is rotatably supported at the rear end. Brake disks 31 and 32 are provided on the front wheel 18 and the rear wheel 19 so as to be rotatable together.

  The body frame 11 includes a pair of left and right main frames 22 extending rearward from the head pipe 21, a pair of left and right subframes 23 disposed below the left and right main frames 22, and the rear ends of the main frame 22 and the subframes 23. A pair of left and right lower frames (bracket members) 24 extending downward from the side, a pair of left and right rear frames (seat rails) 25 extending rearward from the rear side of the main frame 22, and rearward from a vertically middle part of the lower frame 24 A pair of left and right rear auxiliary frames 26 extending and having rear ends connected to the rear frame. The rear ends of the main frame 22 and the sub frame 23 are connected to a cross pipe 27 extending in the left-right direction, and a rear suspension 28 is interposed between the cross pipe 27 and the swing arm 15.

  The fuel tank 13 is mainly mounted on the main frame 22, and the driver's seat 14 is mounted on the rear frame 25. The engine 12 is supported on the subframe 23 and the lower frame 24 via brackets or the like. The swing arm 15 is supported by a support bracket 24 a provided at a front end portion on the front side of the lower frame 24 so as to be swingable up and down.

[Configuration of front wheels]
FIG. 2 is a side view of the front wheel brake disc, and FIG. 3 is a rear sectional view of the front wheel. The front wheel 18 is configured by rotatably supporting a front wheel (wheel wheel) 35 via a bearing 34 on a shaft 33 suspended from the front fork 16 and mounting a pneumatic tire 18 a on the outer periphery of the front wheel wheel 35. Yes. A front wheel brake disk 31 is attached to both side surfaces of the front wheel 35, and a front wheel caliper 36 that clamps the front wheel brake disk 31 with a brake pad 36 a is attached to the front fork 16.

  The front wheel brake disk 31 has a ring shape in a side view, and a plurality of wheel fixing holes 37 are formed at equal intervals in the circumferential direction on the inner peripheral side. Bolts 38 are inserted into the wheel fixing holes 37, and the bolts 38 are screwed into boss portions 39 formed on the side surfaces of the front wheel 35. In the illustrated example, five wheel fixing holes 37 are formed, and the front wheel brake disk 31 is bolted at five locations. The front wheel caliper 36 is attached to a bracket 40 formed on the front fork 16.

[Configuration of front wheel speed detection device]
The motorcycle 10 is equipped with an anti-lock brake system (ABS). As shown in FIG. 1, the ABS is equipped with vehicle speed detection devices 41F and 41R for detecting the rotational speeds of the front and rear wheels 18 and 19, and brake pressure. A pressure adjusting device (not shown) for adjusting and a control means (not shown) for controlling the pressure adjusting device based on information obtained by the vehicle speed detecting devices 41F and 41R are provided.

  The front-wheel vehicle speed detection device 40F includes a front-wheel sensor 42 and a front-wheel sensor rotor 43. The front-wheel sensor 42 includes a bracket 44 formed on the front fork 16, as shown in FIGS. Is attached. The front wheel sensor rotor 43 has a ring shape and includes a large number of detection holes 45 in the circumferential direction. The detection holes 45 are detected by the front wheel sensor 42. A plurality of mounting pieces 46 project from the inner periphery of the front wheel sensor rotor 43 at substantially equal intervals in the circumferential direction, and mounting holes 47 are formed in the mounting pieces 46. In the present embodiment, five attachment pieces 46 and attachment holes 47 are formed.

  A plurality of rotor fixing holes 51 are formed in the front wheel brake disk 31. The number of fixing holes 51 for the rotor is the same as the number of mounting holes 47 of the sensor rotor 43 for the front wheels, and is formed at substantially equal intervals in the circumferential direction on substantially the same circumference centering on the mounting holes 47 and the wheel axis X1. Yes. The rotor fixing hole 51 is formed on substantially the same circumference as the wheel fixing hole 37, and is formed at the substantially center in the circumferential direction between the wheel fixing holes 37.

  The front wheel sensor rotor 43 is attached to the front wheel brake disk 31 via a mounting hole 47 and a rivet (fixing tool) 52 inserted through the rotor fixing hole 51.

[Configuration of rear wheel]
FIG. 4 is a rear sectional view of the rear wheel. As shown in FIGS. 1 and 4, the rear wheel 19 rotatably supports a rear wheel (wheel wheel) 63 via a bearing 62 on a shaft 61 suspended on the swing arm 15. It is comprised by mounting | wearing the part with the pneumatic tire 19a. Rear wheel brake discs 32 are attached to the left and right surfaces of the rear wheel 63. A connecting arm 64b protrudes from a rear wheel caliper 64 that clamps the rear wheel brake disc 32 with a brake pad 64a, and the connecting arm 64b is fixed to a bracket 65 attached to the swing arm 15 by bolts.

  FIG. 5 is a side view showing a rear-wheel brake disc. The rear-wheel brake disc 32 has a ring shape and includes a plurality of projecting pieces 67 and 68 on the inner peripheral portion. The protruding pieces 67 and 68 are a wheel protruding piece 67 for attaching the rear wheel brake disc 32 to the rear wheel wheel 63 and a rotor for attaching a rear wheel sensor rotor 77 to be described later to the rear wheel brake disc 32. It consists of protruding pieces 68, and four are formed at substantially equal intervals (approximately 90 ° intervals) in the circumferential direction. The wheel protruding piece 67 and the rotor protruding piece 68 are arranged with a phase shift of approximately 45 ° from each other.

  The wheel protruding piece 67 and the rotor protruding piece 68 are formed with a wheel fixing hole 71 and a rotor fixing hole 72, respectively, on substantially the same circumference centering on the wheel axis X2.

  A bolt 73 is inserted into the wheel fixing hole 71 of the wheel protruding piece 67, and the bolt 73 is screwed into a boss portion 74 formed on the rear wheel wheel 63.

  The rear wheel vehicle speed detection device 41R includes a rear wheel sensor rotor 77 and a rear wheel sensor 78, as in the front wheel. The rear wheel sensor 78 is attached to the bracket 65. The rear wheel sensor rotor 77 has a ring shape and is provided with a large number of detection holes 79 in the circumferential direction. A plurality of mounting pieces 81 project from the outer periphery of the rear wheel sensor rotor 77 at substantially equal intervals in the circumferential direction. In the illustrated example, four attachment pieces 81 are formed at approximately 90 ° intervals. The attachment piece 81 is formed to be offset toward the rear wheel wheel 63 via the bent portion 82.

  Each mounting piece 81 is formed with a mounting hole 83, and each mounting hole 83 is on substantially the same circumference centered on the same rear wheel axis X2 as the rotor fixing hole 72 of the rear wheel brake disc 73. Is formed. The rear wheel sensor rotor 77 is attached to the rear wheel brake disk 32 by a rivet (fixing tool) 84 inserted into the rotor fixing hole 72 and the mounting hole 83.

[Effects of this embodiment]
(1) As shown in FIGS. 2 and 3, the front wheel sensor rotor 43 is not fastened together with the front wheel brake disk 31 and the bolt 38, but is fixed by a rivet 52 at another position. The head of the bolt 38 does not protrude greatly toward the front fork 16, and a gap t1 can be secured between the head 38 and the distance between the vehicle width center O1 and the front fork 16 as much as possible. Since it can be set small, it can contribute to weight reduction.

(2) As shown in FIG. 4, the rear wheel sensor rotor 77 is not fastened to the rear wheel brake disk 32 with the bolt 73 but is fixed with a rivet 84 at another position. The head portion 73 does not protrude greatly toward the rear wheel caliper 64, and a clearance t2 can be secured between the rear wheel caliper 64 (the connecting arm 64b). In particular, as the connecting arm 64b of the rear wheel caliper 64 moves away from the rear wheel brake disk 32 to the left and right outside, a greater moment is generated by the load from the brake disk 32, so the protrusion of the head of the bolt 73 is reduced. It is effective to bring the connecting arm 64b as close to the brake disc 32 as possible, thereby increasing the load resistance of the rear wheel caliper 64 and reducing the weight of the connecting arm 62b and the like.

(3) Since the rivets 52 and 84 are used as fixtures for the front and rear wheel sensor rotors 43 and 77 with respect to the front and rear wheel brake discs 31 and 32, the fixtures protrude largely outward in the left and right directions. Therefore, sufficient clearances t1 and t2 between the front fork 16 and the rear wheel caliper 64 can be secured.

(4) The mounting holes 47 and 83 of the sensor rotors 43 and 77 and the wheel fixing holes 37 and 71 of the brake disks 31 and 32 are the same in number and on substantially the same circumference around the wheel shaft centers X1 and X2. The sensor rotor having the same shape as that of the conventional sensor rotor that has been fastened together with the brake disc is used as it is, or only by changing the hole diameters of the mounting holes 47 and 83. It can be applied as a sensor rotor. Therefore, the sensor rotor can be shared between the conventional technique and the present invention.

(5) The rear wheel sensor rotor 77 has the mounting piece 81 offset to the rear wheel wheel 63 side, and the mounting piece 81 is attached to the wheel 63 side surface of the rear wheel brake disk 32. The amount of protrusion to the left and right outwards can be further reduced.

[Other Embodiments]
(1) The brake disks 31 and 32 for the front wheels and the rear wheels may be provided only on the left and right sides of the front wheel 18 and the rear wheel 19, respectively.

(2) The sensor rotors 43 and 77 can appropriately change the radial protruding direction of the mounting pieces 46 and 81 according to the shape of the brake disks 31 and 32.

(3) As a fixture of the sensor rotors 43 and 77 to the front and rear wheel brake discs 31 and 32, not only the rivets 52 and 84 but also bolts or other fixing means can be used.

  The present invention can be applied to various motorcycles such as motorcycles for general use or racing.

1 is a side view of a motorcycle according to an embodiment of the present invention. It is a side view of a front wheel brake disc. It is a back sectional view of a front wheel. It is a back sectional view of a rear wheel. It is a side view which shows the brake disc for rear wheels. It is a back sectional view of the front wheel concerning a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Motorcycle 18 Front wheel 19 Rear wheel 31 Brake disc for front wheel 32 Brake disc for rear wheel 35 Front wheel wheel 37 Wheel fixing hole 38 Bolt 39 Boss part 41F Vehicle speed detection device 41R Vehicle speed detection device 42 Front wheel sensor 43 Front wheel sensor rotor 47 Mounting hole 51 Rotor fixing hole 52 Rivet 63 Rear wheel wheel 71 Wheel fixing hole 72 Rotor fixing hole 73 Bolt 74 Boss part 77 Rear wheel sensor rotor 78 Rear wheel sensor 83 Mounting hole 84 Rivet

Claims (3)

In a vehicle speed detection device for a motorcycle, comprising: a sensor rotor that can rotate integrally with a wheel wheel to which a brake disk is fixed; and a sensor that detects rotation of the sensor rotor.
By fixing the brake disc to the wheel wheel with a bolt, and fixing the sensor rotor to the brake disc with a fixture, the wheel wheel and the sensor rotor can be rotated together,
In the brake disc, a wheel wheel fixing portion for fixing the brake disc to the wheel wheel and a sensor rotor fixing portion for fixing the sensor rotor to the brake disc are at different positions in the circumferential direction. Is provided,
In the sensor rotor, a fixing portion for fixing to the fixing portion for the sensor rotor is provided protruding in the radial direction.
A vehicle speed detection device for a motorcycle, characterized by that. The number of fixing points for the wheel wheel and the number of fixing points for the sensor rotor are the same, and are provided at substantially equal intervals in the circumferential direction on substantially the same circumference centering on the axis of the wheel wheel. The vehicle speed detection device for a motorcycle according to claim 1, wherein the vehicle speed detection device is a motorcycle. The fixing portion provided in the sensor rotor is an attachment piece in which an attachment hole for inserting the fixture is formed ,
Mounting piece, while being offset in the axial direction to the wheel wheel side of the wheel wheel, characterized in that it is mounted by polymerizing the wheel wheel-side surface of the brake disk, according to claim 2, wherein Speed detector for motorcycles.

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