JP2002211371A - Antilock brake system for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a speed detection means into a structure depending not on a wheel shape, form a sealed space with the purpose for protecting constituent parts, and constitute a wheel allowing the arrangement of the speed detection means by the minimum machining. SOLUTION: In an antilock brake system for a motorcycle provided with the speed detection means 81, 91 detecting vehicle speed, a pressure adjusting means 100 adjusting a brake pressure of brake devices 40, 50, and a control means 101 controlling the pressure adjusting means 100 so as to keep a proper slip rate by judging a condition of wheels based on vehicle speed information, the speed detection means 81, 91 are constituted by detection rotors 82, 92 attached to the wheels of the wheels so as to rotate integrally, sensor housings 83, 93 covering the detection rotors 82, 92 from the outside and fixed to a vehicle body side, and vehicle speed sensors 84, 94 attached to the sensor housings 83, 93 to detect a vehicle speed by the rotation of the detection rotors 82, 92.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-lock brake system for a motorcycle.

[0002]

2. Description of the Related Art Some motorcycles are provided with an anti-lock brake system to prevent wheel locks that occur during sudden braking or braking on slippery roads such as snowy roads.

This anti-lock brake system includes a speed detecting means for detecting a vehicle speed, a pressure adjusting means for adjusting a braking pressure of a brake device, and a wheel state judging based on vehicle speed information to maintain an appropriate slip ratio. In addition, a control means for controlling the pressure adjusting means is provided, and by maintaining an appropriate slip ratio, it is possible to secure directional stability, steerability, and shorten the braking distance.

[0004]

The speed detecting means for detecting the vehicle speed is intended to protect a detecting rotor which is integrally rotatably mounted on a wheel, and a vehicle speed sensor which detects the vehicle speed by rotating the detecting rotor. Closed space
Since it is formed by the wheel of the wheel and the sensor housing, the shape of the wheel is restricted. In addition, in the case of a motorcycle without the anti-lock brake system and not equipped, the wheel looks bad, so the wheel was covered with another cover.

The present invention has been made in view of the above circumstances, and has a structure in which the structure of the speed detecting means does not depend on the shape of the wheel, and can form an enclosed space for the purpose of protecting the components. It is an object of the present invention to provide an anti-lock brake system for a motorcycle in which the speed detection means can be arranged with minimum processing.

[0006]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.

According to the first aspect of the present invention, there is provided a speed detecting means for detecting a vehicle speed, a pressure adjusting means for adjusting a braking pressure of a brake device, and an appropriate slip ratio by judging a wheel condition based on vehicle speed information. In a motorcycle anti-lock brake system including control means for controlling the pressure adjusting means so as to maintain the speed detection means, a detection rotor attached to the wheel of the wheel so as to be integrally rotatable, and this detection rotor is provided from outside. An anti-lock brake system for a motorcycle, comprising: a sensor housing fixed to a cover body side; and a vehicle speed sensor attached to the sensor housing and detecting a vehicle speed by rotation of the detection rotor. ].

According to the first aspect of the present invention, there is provided a detecting rotor in which the speed detecting means is integrally rotatably mounted on the wheel of the wheel, and a sensor housing which covers the detecting rotor from outside and is fixed to the vehicle body. By creating a closed space for the purpose of protecting the components of the vehicle speed sensor, the structure of the speed detection means is not affected by the shape of the wheel. At the rear, the speed detection means can be arranged in a similar shape.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an antilock brake system for a motorcycle according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of a motorcycle having an anti-lock brake system, FIG. 2 is a side view of a front wheel portion, and FIG.
4 is a cross-sectional view of the front wheel portion, FIG. 4 is a front view of the front detection rotor, FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4, FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 7, FIG. 9 is a sectional view taken along the line IX-IX of FIG. 6, FIG. 10 is a side view of the rear wheel, and FIG. 12 is a front view of the rear sensor housing, FIG. 13 is a rear view of the rear sensor housing, FIG. 14 is a sectional view taken along line XIV-XIV of FIG. 12, and FIG. 15 is a sectional view taken along line XV-XV of FIG. .

A front fork 4 on which a front wheel 3 is suspended is rotatably supported on a head pipe 2 constituting a body frame 1 of the motorcycle, and can be steered by a bar handle 5. A pair of left and right main frames 6 extending rearward is welded to the rear side of the head pipe 2, and a rear arm bracket 7 is welded to the rear portion of the main frame 6.

The front wheel 3 has a wheel 30 rotatably mounted on an axle 32 via a bearing 31. The axle 32 is supported by a lower end of the front fork 4. A tire 33 is attached to the wheel 30.

A rear side of a back stay 9 extending rearward is attached to the rear arm bracket 7. Seat frames 8 are welded to the rear ends of the pair of left and right main frames 6, respectively. 9 is welded to the rear side.

A seat 10 is mounted on the seat frame 8, and a fuel tank 11 is mounted on the main frame 6 in front of the seat 10. A pair of left and right down tubes 12 is connected to the rear side of the head pipe 2. The engine 26 is mounted on the main frame 6 and the rear arm bracket 7.

A pivot shaft 13 is inserted through the rear arm bracket 7, and a rear arm 14 is pivotally supported by the pivot shaft 13, and the rear arm 14 is supported by a rear wheel suspension 21. The rear end of the rear arm 14
5 are supported. A rear wheel 15 supported by the rear arm 14 is driven by a shaft drive mechanism 16.

The shaft drive mechanism 16 has a drive shaft 50 connected to a bevel gear 52 disposed in a gear box 51. The gear box 51 is mounted on the gear box mounting portion 14a of the rear arm 14, and an axle 53 is mounted between the gear box 51 and the arm portion 14b.

A wheel 54 of the rear wheel 15 is rotatably provided on the axle 53, and a tire 17 is mounted on the wheel 54. A bevel gear 55 is provided on the wheel 54 so as to be integrally rotatable. The bevel gear 55 is meshed with the bevel gear 52, and power from the drive shaft 50 is transmitted to the wheel 54 via the bevel gear 52 and the bevel gear 55.

This motorcycle is provided with an anti-lock brake system. The anti-lock brake system includes speed detecting means 81 and 91 for detecting the vehicle speed of the front wheel 3 and the rear wheel 15, a front brake device 40 and a rear brake device. Pressure adjusting means 100 for adjusting the braking pressure of 60
And control means 101 for controlling the pressure adjusting means 100 so as to maintain the proper slip ratio by judging the condition of the wheels based on the vehicle speed information.

The motorcycle is provided with a pair of front brake devices 40.
As 0, a disc brake device is used as shown in FIGS.

The brake disc 41 of each front brake device 40 is provided with screws 42 on both sides of the wheel 30.
, And the brake disc 41 can rotate integrally with the wheel 30.

The bracket 4 of the front brake device 40
3 is fastened and fixed to the front fork 4 by a pair of fixing members 44, and a caliper 45 is movably supported by the bracket 43 by a pair of slide pins 46, and the caliper 45 straddles the outer periphery of the brake disc 41. . Friction pads 47, 48 arranged inside caliper 45
Are located on both sides of the braking surface of the brake disc 41.

When the brake fluid is supplied to the caliper 45 from the brake hose 49, the friction pad 47 is pushed by a piston (not shown) and slides on the braking surface of the brake disc 41, and the caliper 45 is moved by the reaction force. The friction pad 48 is brought into sliding contact with the braking surface on the opposite side of the brake disc 41 to perform braking.

The speed detecting means 81 constituting the anti-lock brake system 80 includes a detecting rotor 82 rotatably mounted on the wheel 30 of the front wheel 3 and a sensor housing which covers the detecting rotor 82 from outside and is fixed to the vehicle body. A vehicle speed sensor 84 is attached to the sensor housing 83 and detects a vehicle speed by rotation of a detection rotor 82.

As shown in FIGS. 4 and 5, the detection rotor 82 is formed in an annular shape, and has irregularities 82a on the outer periphery. The inner peripheral portion 82b of the detection rotor 82 is
The detection rotor 82 rotates integrally with the wheel 30 by being press-fitted into and fixed to the mounting boss portion 30a.

The sensor housing 83 is formed in a dish shape as shown in FIGS. The sensor housing 83 has a shaft portion and a cover portion formed as separate members, has a mounting hole 83a in the shaft portion and a sensor mounting portion 83b in the cover portion, and is mounted by inserting the mounting hole 83a through the axle 32. A sensor mounting hole 83b1 and a screw hole 83b2 are formed in the sensor mounting portion 83b, the vehicle speed sensor 84 is inserted into the sensor mounting hole 83b1, and the mounting screw 85 is inserted into the screw hole 83b.
2 and attached by screwing.

As described above, the speed detecting means 81 is connected to the front wheel 3
A detection rotor 82 attached to the wheel 30 so as to be integrally rotatable, and a sensor housing 83 which covers the detection rotor 82 from the outside and is fixed to the vehicle body side, creates an enclosed space for the purpose of protecting the components of the vehicle speed sensor 84. By doing
The structure of the speed detecting means 81 is not influenced by the shape of the wheel.
It may be a minimum such as forming 0a.

This motorcycle includes a rear brake device 6
0 is disposed, and a disc brake device is used as the rear brake device 60 as shown in FIGS.

The brake disc 61 of the rear brake device 60 is mounted on the right side of the wheel 54 with a screw 62, and the brake disc 61 can rotate integrally with the wheel 54.

Bracket 63 of rear brake device 60
Is supported by an axle 53 and is supported by a rear arm 14 via a tension member 64. A caliper 65 is movably supported on the bracket 63 by a pair of slide pins 66, and the caliper 65 straddles the outer periphery of the brake disc 61. The friction pads 66, 67 arranged inside the caliper 65 are located on both sides of the braking surface of the brake disc 61.

When the brake fluid is supplied to the caliper 65 from the brake hose 68, the friction pad 66 is pushed by a piston (not shown) and slides on the braking surface of the brake disk 61, and the caliper 65 is moved by the reaction force. The friction pad 67 is brought into sliding contact with the braking surface on the opposite side of the brake disk 61 to perform braking.

The speed detecting means 91 constituting the anti-lock brake system 80 includes a detecting rotor 92 rotatably mounted on the wheel 54 of the rear wheel 15 and a sensor fixed to the vehicle body by covering the detecting rotor 92 from outside. It comprises a housing 93 and a vehicle speed sensor 94 attached to the sensor housing 93 and detecting a vehicle speed by rotation of a detection rotor 92.

The detection rotor 92 is formed in an annular shape, and has irregularities 92a on the outer periphery. The inner peripheral portion 92b of the detection rotor 92 is pressed into and fixed to the mounting boss portion 54a of the wheel 54, and the detection rotor 92 rotates integrally with the wheel 54.

The sensor housing 93 is shown in FIGS.
As shown in FIG. 5, it is formed in a circular dish shape. In the sensor housing 93, the shaft portion and the cover portion are formed as separate members, and the mounting portion 93a is formed in the shaft portion, and the sensor mounting portion 9 is formed in the cover portion.
3b, and is attached by inserting the attachment hole 93a through the axle 53. A sensor insertion hole 93 is provided in the sensor mounting portion 93b.
b1 and a screw hole 93b2 are formed, the vehicle speed sensor 94 is inserted into the sensor insertion hole 93b1, and the mounting screw 95 is screwed into the screw hole 93b2 to be mounted.

As described above, the speed detecting means 91 is connected to the front wheel 1
The speed detecting means 91 is formed by forming a closed space for a vehicle speed sensor 94 by a detection rotor 92 which is integrally rotatably attached to the wheel 54 of the fifth vehicle and a sensor housing 93 which covers the detection rotor 92 from the outside and is fixed to the vehicle body. Is a structure that is not affected by the shape of the wheel, and the processing such as processing on the wheel side may be minimized by forming the mounting boss portion 54a.

The mounting boss 30a of the wheel 30
And the mounting boss 54a of the wheel 54 are formed in the same manner, and the speed detecting means 81, 91 can be arranged in the same shape at the front and rear.

[0036]

As described above, according to the first aspect of the present invention, the speed detecting means is attached to the wheel of the wheel so as to be integrally rotatable, and the speed detecting means is fixed to the vehicle body by covering the detecting rotor from the outside. The structure of the speed detection means is not affected by the shape of the wheel by creating a sealed space with the sensor housing that protects the components of the vehicle speed sensor. The speed detecting means can be arranged in the same shape at the front and the rear.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle including an anti-lock brake system.

FIG. 2 is a side view of a front wheel portion.

FIG. 3 is a sectional view of a front wheel portion.

FIG. 4 is a front view of a front detection rotor.

FIG. 5 is a sectional view taken along the line VV of FIG. 4;

FIG. 6 is a front view of a front sensor housing.

FIG. 7 is a rear view of the front sensor housing.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7;

FIG. 9 is a sectional view taken along line IX-IX in FIG. 6;

FIG. 10 is a side view of a rear wheel portion.

FIG. 11 is a sectional view of a front wheel portion.

FIG. 12 is a front view of a rear sensor housing.

FIG. 13 is a rear view of the rear sensor housing.

FIG. 14 is a sectional view taken along the line XIV-XIV of FIG.

FIG. 15 is a sectional view taken along the line XV-XV in FIG. 12;

[Explanation of symbols]

 81, 91 speed detecting means 82, 92 detecting rotor 83, 93 sensor housing 84, 94 vehicle speed sensor 100 pressure adjusting means 101 control means

Claims (1)

[Claims] 1. A speed detecting means for detecting a vehicle speed, a pressure adjusting means for adjusting a braking pressure of a brake device, and a pressure adjusting means for judging a wheel condition based on vehicle speed information so as to maintain an appropriate slip ratio. An anti-lock brake system for a motorcycle comprising a control means for controlling the speed control means, a detection rotor having the speed detection means attached to a wheel of a wheel so as to be integrally rotatable, and a sensor fixed to the vehicle body side covering the detection rotor from outside. An anti-lock brake system for a motorcycle, comprising: a housing; and a vehicle speed sensor attached to the sensor housing and detecting a vehicle speed by rotation of the detection rotor.