JPH0717609Y2 - Anti-lock braking system for motorcycles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an anti-lock braking device for a motorcycle, and more specifically, a braking device for preventing the vehicle body from traveling with the wheels stopped rotating. It is about.

[Prior Art] Conventionally, there is an anti-lock braking device that prevents a locked state of a brake, that is, a state in which rotation of wheels is stopped and a vehicle body slides on a road surface to travel (for example, Japanese Patent Laid-Open Publication No. -236856 gazette). This braking device has a mechanical structure. Compared to the mechanical type, the electronic anti-lock braking system has recently been attracting attention because it can operate the braking system in accordance with the change in the friction coefficient of the road surface.

[Problems to be Solved by the Invention] By the way, this type of electronic anti-lock braking system requires a wheel speed sensor for detecting the rotational speed of the wheel. As a means for fixing the wheel speed sensor, fixing to the axle collar of the axle can be considered, but it is inconvenient during maintenance. This will be described below with reference to FIGS. 8 and 9.

In FIG. 8, 70 is a front fork of the front wheel, which supports the axle 23A at its lower end. An axle collar 50 is fitted into the axle 23A as shown in FIG.
The axle collar 50 has an integrally formed bracket.
The wheel speed sensor 11A is fixed via 51. The wheel speed sensor 11A is fixed to the hub 83 of the front wheel, and detects the uneven detection target portion 53 of the rotor 52 that rotates integrally with the hub 83. The axle collar 50 is a bracket
Although the cover 54 is fixed with the bolt 55 via the 51,
Positioning in the rotational direction is performed by the 60 and the recess 71 provided in the front fork 70.

However, in the above configuration, when the front wheel 70 is pulled out from the front fork 70 when the front wheel tire (not shown) or the axle 23A is replaced, the axle collar 50 penetrating the axle 23A is separated from the vehicle body. . For this reason, the axle color
The wheel speed sensor 11A fixed to 50 is hanging from the vehicle body, or the wiring 22A shown in FIG. 8 needs to be removed. Therefore, tire replacement work is troublesome and inconvenient during maintenance. is there. This inconvenience similarly occurs in the wheel speed sensor provided on the rear wheel.

This invention was made in view of the above problems,
The number of parts can be reduced to reduce costs, and the wheel speed sensor can be accurately placed at a predetermined position without any special adjustment work, which is effective for assembly and maintenance. In addition, it is another object of the present invention to provide an anti-lock braking device for a motorcycle that facilitates maintenance such as tire replacement work.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the invention of claim (1) includes a caliper that presses a disc plate according to a hydraulic pressure to stop the disc plate, and a caliper and a master cylinder for brake operation. A hydraulic unit that is provided in the piping path and adjusts the hydraulic pressure of the caliper to release the locked state of the brake, and the front and rear wheels that detect the rotation speed of the front and rear wheels and output the wheel speed signals, respectively. A speed sensor and an electronic control device for receiving a signal of a wheel speed output from the wheel speed sensor and performing a calculation based on the wheel speed to determine a lock state of a brake and control the hydraulic unit. In an anti-lock braking system for a motorcycle, the boss and the caliper are attached to a lower portion of a front fork supporting the front wheel. There is integrally formed, with a wheel speed sensor for the front wheel to the boss is fixed, and is characterized in that the bracket for fixing the caliper to the mounting portion is fixed.

Further, in the invention of claim (2), in an anti-lock braking device for a motorcycle including the same constituent elements as described above, the above-mentioned structure is provided in a holder whose one end is swingably attached to an axle of a rear wheel. A wheel speed sensor for the caliper and the rear wheel is held, and the other end of the holder is attached to a swing arm so as to receive the reaction of the braking force when the braking force of the caliper acts on the disc plate. The rear end of the torque arm is connected.

[Action]

According to the invention of claim (1), the wheel speed sensor for the front wheel is fixed to the boss integrally formed in the lower portion of the front fork supporting the front wheel, and the caliper mounted integrally in the lower portion of the front fork is attached. Since the caliper is fixed to the portion via the bracket, the bracket for mounting the sensor and the screw for fixing the bracket to the front fork are unnecessary, and the number of parts can be reduced. Further, since the boss and the caliper mounting portion are integrally formed with the front fork, the dimensional accuracy of the wheel speed sensor and the caliper from the center of the front wheel axle is assured. This eliminates the need for adjustment work, which is extremely advantageous in terms of production and maintenance. Further, since the wheel speed sensor is fixed to the vehicle body through the front fork, even if the axle is pulled out of the vehicle body when the tire is replaced, the wheel speed sensor does not hang down from the vehicle body, and the wiring is removed. There is no need and maintenance is easy.

Further, according to the invention of claim (2), one end of the rear wheel is swingably attached to the axle of the rear wheel, and the other end is attached to the holder held by the vehicle body via the torque arm and the swing arm. Since the wheel speed sensor for the rear wheels is held, even if the axle is pulled out from the vehicle body when changing tires, the wheel speed sensor does not hang down from the vehicle body, and it is not necessary to remove the wiring for maintenance. Not only is it easy to perform dimensional accuracy from the center of the rear wheel axle to the caliper and the wheel speed sensor for the rear wheel, there is no need for adjustment work to achieve dimensional accuracy, which improves productivity and maintenance. It is possible to improve the assemblability. In particular, in the case of a wheel speed sensor, it is necessary to keep the clearance between the detected part within a certain range in order to secure the detection accuracy by suppressing the deterioration of the detection performance due to the contact and the variation of the distance.
It is possible to meet the demand sufficiently.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

First, an outline of the electronic anti-lock braking device will be described.

In FIG. 1, 1 is a front fork, 4 is a swing arm, and the front fork 1 and the swing arm 4 rotatably support a front wheel 2A and a rear wheel 2B, respectively. 3A and 3B are disk plates,
It is fixed to the front wheels 2A and the rear wheels 2B, and the disk plates 3A, 3B are provided with the calipers 5A, 5B to form a known disk brake device.

In FIG. 2, reference numeral 8 is a hydraulic unit, which is provided between the paths of the pipes 7A and 7B and, as will be described later, the caliper 5
It adjusts the hydraulic pressure of A and 5B to release the locked state of the brake. The above-mentioned Caliper 5A and the first for brake operation
The master cylinder 6A is communicated with the master cylinder 6A via the pipe 7A and the first hydraulic circuit 14A of the hydraulic unit 8. On the other hand, the caliper 5B and the second master cylinder 6B for brake operation are the second pipe of the pipe 7B and the hydraulic unit 8.
It communicates via the hydraulic circuit 14B.

The first and second master cylinders 6A and 6B are for interlocking with the handle lever 9A and the brake pedal 9B, respectively, to generate hydraulic pressure for operating the calipers 5A and 5B. 10A is a first reserve tank and 10B is a second reserve tank, which is a tank for supplying oil to the master cylinders 6A, 6B and storing the oil discharged from the master cylinders 6A, 6B.

11A is a wheel speed sensor for the front wheels, 11B is a wheel speed sensor for the rear wheels, and detects uneven portions 53A, 53B formed on the disk plates 3A, 3B to detect the front wheels 2A and the rear wheels 2 respectively.
The rotation speed of B (see FIG. 1) is detected. The detected wheel speed signals n1 and n2 are output to the microcomputer 12.

The microcomputer 12 has first and second electronic control units 13A and 13B built therein. The first and second electronic control units 13A and 13B are provided with wheel speed signals n1 and n1, respectively.
When n2 is received, the acceleration / deceleration of the wheels is calculated based on these signals n1 and n2 to determine the locked state of the brake, and control signals a1 and a2 for controlling the hydraulic unit 8 are output.

The hydraulic unit 8 is composed of one motor M, first and second hydraulic circuits 14A and 14B, first and second oil reservoirs 15A and 15B, and the like. The hydraulic unit 8 switches the switching valves 16A, 16B, 1 by the control signals a1, a2.
7A and 17B are switched, and the motor M operates. By this switching and operation, the hydraulic pressure of the first and second master cylinders 6A, 6B is changed to the calipers 5A, 5B.
Directly to the oil chamber 42 (see FIG. 6) of the
The oil is released to A, 15B and the operation of the calipers 5A, 5B is released, or the motor M is actuated, and the hydraulic pressure according to the calculation acts on the calipers 5A, 5B, causing the brake lock state. The vehicle stops while preventing

Next, the main part of this invention will be described.

In FIG. 3, a bracket 20 for fixing the caliper 5A is fixed to the lower part of the front fork 1. A boss 21 is integrally formed below the bracket 20 so as to project from the rear portion 1a of the front fork 1 toward the rear B. A sensor mounting hole 82 is formed in the boss 21 as shown in FIG. The wheel speed sensor 11A is inserted into the mounting hole 82 and fixed to the boss 21 with the bolt 80 shown in FIG.

The detection portion 45A of the wheel speed sensor 11A shown in FIG. 4 is arranged close to a detection portion 53A formed in a gear shape on the inner peripheral surface of the disk plate 3A made of a magnetic material. The wheel speed sensor 11A is, for example, a magnetic proximity sensor, and a pulse is generated when the convex portion of the detected portion 53A passes by, and the pulse is generated as the wheel speed signals n1 and n2 in FIG. Output to.

The axle collar 50A shown in FIG. 4 is formed in an annular shape.

In the above structure, since the front wheel speed sensor 11A of FIG. 3 is fixed to the vehicle body through the front fork 1, even if the axle 23A is pulled out from the funnel fork 1 when the tire is replaced, The speed sensor 11A is fixed to the front fork 1 and does not hang down from the vehicle body. Therefore, unlike the case of FIG. 8, it is not necessary to remove the wiring 22A, so that the inconvenience at the time of maintenance is eliminated and the tire replacement work is facilitated.

Further, a boss 21 for fixing the wheel sensor 11A shown in FIG. 3 is formed integrally with the front fork 1. This boss 21
Since the front forks 1 can be formed at the same time when they are molded, it is not necessary to separately provide a bracket for mounting the sensor on the front forks 1, and the number of parts can be reduced.

Here, as shown in FIG. 8, when the wheel speed sensor 11A is fixed to the axle collar 50, the axle collar 50 is not fixed to the vehicle body by the bolts 55, and therefore the boss 60 for positioning the axle collar 50. This embodiment also eliminates the need for such positioning of the axle collar by the boss 60.

Moreover, as shown in FIG. 4, the axle collar 50A is originally
It is a part that is machined into an annular shape, and if the bracket 51 (Fig. 7) is integrally formed, the manufacturability will decrease, while the front fork 1 is a molded product, and even if the boss 21 is provided, it will not be manufactured. No hassle. In this way, the number of parts can be reduced and manufacturing is facilitated, so that the cost can be reduced.

Although the sensor mounting boss 21 is projected to the rear portion 1a of the front fork 1 in the above-described embodiment, the present invention is not limited to this.
It may be configured so as to project to the drawing).

In the above embodiment, the detected portion 53A is provided on the inner peripheral surface of the disk plate 3A, but as another embodiment of the present invention,
As shown in FIG. 5, the disk plate 3A is not provided with a detected part, and the rotor 52 is fixed to the hub 83 as in the case of FIG. The detection unit 45A of the wheel speed sensor 11A may be arranged close to each other.
By the way, in FIG. 5, the cover for the rotor shown in FIG.
Illustration of 54 is omitted. This cover is, for example, the boss 21 of the front fork 1 or the caliper 50A.
It is mounted on the vehicle body using the mounting boss (see FIG. 3).

FIG. 6 is a side view showing the mounting state of the wheel speed sensor for the rear wheels. In FIG. 6, the holder 31 for holding the caliper has one end 31a thereof swingably mounted on the axle 23B of the rear wheel. The other end 31b is attached to the rear end of the torque arm 32. The torque arm 32 receives a reaction force of the braking force of the caliper 5B on the disk plate 3B and is attached to the swing arm 4 as shown in FIG.

As shown in FIG. 7, the rear wheel caliper 5B held by the holder 31 includes a friction material pad 40, a piston 41, an oil chamber
42 and. The friction material pad 40 is pressed against the disk plate 3B with a pressing force corresponding to the hydraulic pressure of the oil chamber 42 communicating with the second master cylinder 6B (see FIG. 2) to stop the rotation of the disk plate 3B. It is a thing. The disk plate 3B is fixed to the hub 84 of the rear wheel by bolts 43, and a gear-shaped detected portion 53B is formed on the inner peripheral surface of the disk plate 3B.

The holder 31 has a sensor mounting hole 44 formed therein.
The wheel speed sensor 11B is inserted into the mounting hole 44 and fixed to the holder 31 with a bolt 81 shown in FIG. The detection portion 45B of the wheel speed sensor 11B shown in FIG.
It is arranged close to the detected part 53B.

In the above structure, the wheel speed sensor 11B for the rear wheels is connected to the axle 23B.
Since it is fixed to the vehicle body via the holder 31 attached to, even if the axle 23B is pulled out from the vehicle body when changing tires,
Since the holder 31 shown in FIG. 5 remains held by the vehicle body via the torque arm 32, the wheel speed sensor 11B fixed to the holder 31 does not hang down from the vehicle body. Therefore,
It is no longer necessary to remove the wiring 22B of the wheel speed sensor 11B.
Similar to the case of 2A (Fig. 1), tire replacement work becomes easy.

[Effect] As described above, according to the invention of claim (1), the boss is integrally formed on the lower portion of the front fork supporting the front wheel, and the dimensional accuracy from the center of the front wheel axle is guaranteed. Since the wheel speed sensor for the front wheel is fixed to the front fork, the caliper is fixed via the bracket to the caliper mounting part where the dimensional accuracy from the center of the front wheel axle is guaranteed in the same way. Separately, a bracket for mounting the sensor and screws for fixing the bracket are not required, which not only reduces costs by reducing the number of parts, but also eliminates the need for adjustment work to obtain dimensional accuracy after assembly. It is possible to improve productivity, maintenance and assembly. Further, since the wheel speed sensor is fixed to the vehicle body via the front fork, even if the axle is pulled out from the vehicle body when the tires are replaced, the wheel speed sensor does not hang down from the vehicle body, and its wiring is removed. There is no need, and maintenance can be facilitated.

Further, according to the invention of claim (2), the dimensional accuracy from the center of the axle of the rear wheel to the caliper and the wheel speed sensor for the rear wheel can be easily obtained, so that the adjustment work for obtaining the dimensional accuracy is unnecessary. It is possible to improve productivity, maintenance and assembly. In particular, when mounting the wheel speed sensor, it is possible to ensure that the clearance between the wheel speed sensor and the detected part is within a certain range, and therefore, it is possible to prevent deterioration of the detection performance due to contact and variation in distance, and Detection accuracy can be secured.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of an electronic antilock braking device, and FIG. 3 is a main part of the invention of claim (1). Side view,
FIG. 4 is a sectional view showing a mounting state of the axle speed sensor shown in FIG. 3, FIG. 5 is a sectional view showing another embodiment of the present invention, and FIG.
FIG. 7 is a side view showing an essential part of the invention of claim (3), FIG. 7 is a sectional view showing a mounting state of the wheel speed sensor of FIG. 6, and FIG. 8 is a wheel speed sensor not included in the invention. FIG. 9 is a side view showing the attached state, and FIG. 9 is a sectional view of FIG. 1 ... front fork, 2A ... front wheel, 2B ... rear wheel, 3
A, 3B …… Disk plate, 5A, 5B …… Caliper, 6A, 6B
... master cylinder, 7A, 7B ... piping, 8 ... hydraulic unit, 11A, 11B ... wheel speed sensor, 12 ... electronic control unit, 23A, 23B ... axle, 31 ... holder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-142735 (JP, A) JP-A-63-134359 (JP, A) Actual development: Sho-49-102197 (JP, U) Actual public: 55- 17169 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. A caliper that presses against a disc plate in response to hydraulic pressure to stop the disc plate, and a pipe path provided between the caliper and a master cylinder for brake operation is used to adjust the hydraulic pressure of the caliper. To release the lock state of the brakes, front and rear wheel speed sensors that detect the rotational speeds of the front and rear wheels and output wheel speed signals, and these wheel speed sensors output the signals. An anti-lock braking system for a motorcycle including an electronic control unit for controlling the hydraulic unit by determining a brake lock state by receiving a wheel speed signal and performing a calculation based on the wheel speed. In the device, a boss and a mounting portion of the caliper are integrally formed on a lower portion of a front fork supporting the front wheel, and the boss is provided with the front wheel. Together with wheel speed sensors is fixed, antilock braking system motorcycle bracket is characterized in that it is fixed for fixing the caliper to the mounting portion. 2. A caliper that is brought into pressure contact with a disc plate to stop the disc plate in response to a hydraulic pressure, and a pipe path provided between the caliper and a master cylinder for brake operation to adjust the hydraulic pressure of the caliper. To release the lock state of the brakes, front and rear wheel speed sensors that detect the rotational speeds of the front and rear wheels and output wheel speed signals, and these wheel speed sensors output the signals. An anti-lock braking system for a motorcycle including an electronic control unit for controlling the hydraulic unit by determining a brake lock state by receiving a wheel speed signal and performing a calculation based on the wheel speed. In the device, the caliper and the wheel speed sensor for the rear wheel are held by a holder whose one end is swingably attached to the axle of the rear wheel. In addition, the rear end of the torque arm attached to the swing arm is connected to the other end of the holder so as to receive the reaction of the braking force of the caliper when the braking force acts on the disc plate. An anti-lock braking system for motorcycles.