JP6149675B2 - Brake equipment for motorcycles - Google Patents

Description

  The present invention relates to a brake device for a motorcycle (motorcycle) employing a caliper integrated ABS (anti-lock modulator).

  In a two-wheeled vehicle, when the wheels are locked, the steerability is impaired and the possibility of falling is increased. In particular, if the front wheel lock occurs when the speed is high, the steering performance deteriorates and the vehicle body turns forward, making it easier for the rear wheels to lift off the road surface.

  For this reason, ABS that avoids wheel lock is also adopted for a brake device for a motorcycle.

  A motorcycle brake device including the ABS is disclosed in, for example, Patent Document 1 below. In the brake device for a motorcycle described in Patent Document 1, the number of parts is reduced and the space is saved by providing the pressure increase control means and the pressure reduction control means at different locations.

  Specifically, the hydraulic pressure control body (second hydraulic pressure control body) of the pressure reduction control means is provided integrally on the outside of the caliper in the radial direction of the brake disk, and the hydraulic pressure control body (first fluid pressure control body) of the pressure increase control means is provided. The pressure control body) is integrated with the master cylinder (brake modulator unit) and disposed inside the front cover near the front wheels together with the ECU.

  Patent Document 2 below describes a brake device for a four-wheeled vehicle in which a drive control device is integrally fixed to a caliper. In the brake device of Patent Document 2, an actuator that is electrically driven to generate a braking force is incorporated in a caliper, and a drive control device that controls the actuator is connected to an end of the actuator on the side opposite to the disk rotor.

JP 2005-238901 A JP 2003-137081 A

  The ABS for vehicles is required to meet the recent demand for miniaturization. There is no ABS for motorcycles.

  In addition, ABS for motorcycles is also required to be able to withstand use under severe conditions.

  In response to this requirement, the brake device of Patent Document 1 in which the pressure reduction control means and the pressure increase control means are provided separately, because the pressure reduction control means and the pressure increase control means are independent, the housing cannot be shared, The effect of miniaturization and space saving is not maximized.

  In addition, the brake piping, the electrical wiring between the ECU for issuing a control command for pressure reduction and pressure increase, the pressure reduction control means, and the pressure increase control means become complicated.

  On the other hand, in the brake device of Patent Document 2, the electrically driven actuator corresponds to an ABS hydraulic control unit, and the drive control device corresponds to an ABS electronic control unit. Therefore, although it can be considered that the entire ABS is integrated with the caliper, no consideration is given to protecting the electronic control unit.

  In the case of a motorcycle, the caliper is attached to a spoke adjacent to the tire. For this reason, a foreign object (such as a stepping stone wound around a tire) is scattered and collided.

  In the case of a four-wheeled vehicle, the body of the vehicle acts as a guard against scattered foreign matter. However, since the caliper is exposed to the outside of a two-wheeled vehicle, the possibility of the scattered foreign matter hitting the electronic control unit of the ABS increases.

  The ABS electronic control unit generally has a case made of resin. For this reason, if the impact due to the collision of the foreign matter is large, the case may be broken and the waterproof performance may be impaired.

  The case of the electronic control unit contains a circuit board that is vulnerable to water. Therefore, it is not preferable that the waterproof performance of the case is impaired.

  Accordingly, an object of the present invention is to realize and provide a brake device for a motorcycle that can meet demands for simplification of brake piping and the like and miniaturization of the device, and can withstand use under adverse environments.

  In order to solve the above-mentioned problems, the present invention is configured as follows for a two-wheeled vehicle brake device including an anti-lock modulator that controls the hydraulic pressure of a wheel cylinder to avoid wheel locking.

That is, the motorcycle brake device includes a disc rotor that rotates integrally with a wheel, a pair of opposed brake pads that are in sliding contact with both surfaces of the disc rotor, and a caliper that includes an actuator unit that presses the brake pad.
The anti-lock modulator that combines a hydraulic control unit having at least a control valve for pressure reduction inside a housing and an electronic control unit in which a circuit board having a control circuit for hydraulic pressure is housed in a case is provided. The control unit is arranged on the outer side in the axle direction, and the electronic control unit is arranged on the inner side in the axle direction with respect to the hydraulic pressure control unit, and is integrated with the caliper.

  The caliper is composed of the actuator section, a reaction section facing the actuator section, and a bridge section that connects the actuator section and the reaction section across the disk rotor. The hydraulic control unit is disposed on the caliper on the actuator section side, and the electronic control unit is disposed on the outer periphery of the bridge section. Preferably, the reaction part is inserted between the wheel and the disk rotor, and the caliper is mounted on the vehicle so that the actuator part is positioned outside the disk rotor in the axle direction.

  Note that a floating caliper is usually used for a brake device of a motorcycle. In the disk brake using the floating caliper, the actuator part is composed of a cylinder formed in the caliper and a hydraulically operated brake piston inserted into the cylinder, and the brake piston is one brake brake. The pad is pressed and brought into sliding contact with one surface of the disk rotor.

  The caliper slides to the cylinder side by the reaction force at that time, so that the caliper claw (floating type caliper reaction portion) presses the other brake pad to make sliding contact with the other surface of the disk rotor. The cylinder and claw of the caliper are connected via a bridge portion that straddles the disk rotor.

  In general, the floating caliper has a claw inserted between a wheel and a disk rotor, and the cylinder is disposed outside the disk rotor in the axle direction. For such an arrangement, the hydraulic pressure control unit is preferably arranged on the cylinder side of the caliper, and the electronic control unit is arranged on the outer periphery of the bridge portion of the caliper.

  For the configuration in which the actuator part of the caliper is inserted between the wheel and the disk rotor and the reaction part is arranged outside the disk rotor in the axle direction, the electronic control unit is provided on the actuator part side, and the caliper bridge part A hydraulic control unit is arranged on the outer periphery of the reaction part.

  In the two-wheeled vehicle brake device according to the present invention, the entire ABS is integrated with the caliper, so that the effect of miniaturization is maximized and the brake piping and electrical wiring are not complicated.

  Further, the hydraulic pressure control unit has a housing formed of a lump of metal such as aluminum, and the hydraulic pressure control unit is on the outside in the axle direction, that is, on the side exposed to the outside. And can withstand use in adverse environments without problems.

  A hydraulic pressure control unit is arranged on the caliper actuator side, and an electronic control unit is arranged on the outer periphery of the bridge part. The caliper reaction part enters between the wheel and the disk rotor, and the cylinder is more than the disk rotor. In the case where the vehicle is mounted on the vehicle in a posture outside the axle direction, the effect of downsizing the brake device can be further enhanced by integrally forming the housing and caliper of the hydraulic control unit.

It is a figure which shows an example of the brake device for two-wheeled vehicles of this invention in a use condition. FIG. 2 is an end view of the caliper integrated ABS provided in the brake device of FIG. 1 on the caliper actuator side. FIG. 2 is a plan view of a caliper-integrated ABS provided in the brake device of FIG. 1. FIG. 2 is an end view of a caliper reaction part side of a caliper integrated ABS provided in the brake device of FIG. 1. FIG. 2 is a side view of one side of a caliper integrated ABS provided in the brake device of FIG. 1. FIG. 2 is a side view of the other side of the caliper-integrated ABS provided in the brake device of FIG. 1. FIG. 2 is an end view showing the caliper reaction part side of the caliper-integrated ABS provided in the brake device of FIG. 1 with the cover of the case of the electronic control unit removed. It is a figure which shows the circuit structure of an example brake device.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a motorcycle brake device according to the present invention will be described below with reference to FIGS.

  The illustrated motorcycle brake device employs a pumpless ABS (ABS that does not include a pump driven by a motor).

  A circuit configuration of an exemplary brake device is shown in FIG. The circuit shown shows only the front wheel system. Since the rear wheel system has a common structure in which the master cylinder is directly connected to the wheel cylinder, the illustration is omitted.

  The ABS of the brake device shown in FIG. 8 performs pressure reduction control for avoiding wheel lock when necessary, and includes a master cylinder 2 that generates brake hydraulic pressure by operating the brake lever 1 and a wheel cylinder 3 of the front wheel. A normally open shut-off solenoid valve 5 is disposed in the main flow path 4 therebetween.

  In addition, a normally closed pressure reducing solenoid valve 7 on a reflux path 6 from the downstream side of the cutoff solenoid valve 5 (wheel cylinder 3 side) to the upstream side of the cutoff solenoid valve 5 (master cylinder 2 side), and the pressure reduction solenoid valve A reservoir 8 for temporarily storing the brake fluid discharged from the wheel cylinder 3 via a valve and a check valve 9 for preventing a backflow of the brake fluid to be recirculated are disposed.

  The example brake device configured as described above is configured such that when a sign of front wheel lock is detected based on information from a wheel speed sensor (not shown) or the like, the electronic control device mounted on the circuit board of the electronic control unit A pressure reduction command is issued from the (ECU) 10 and the shut-off solenoid valve 5 shuts off the main flow path 4. In this state, the pressure-reduction solenoid valve 7 opens and the hydraulic pressure in the wheel cylinder 3 decreases.

  When the brake tends to be too loose due to the decrease in the hydraulic pressure, the shut-off solenoid valve 5 is opened and the pressure-reducing solenoid valve 7 is closed, so that repressurization is performed. The repressurization and decompression are repeated within a range where the piston of the master cylinder 2 does not bottom out (does not hit the bottom of the pressurizing chamber) if necessary.

  When the brake is released, the shut-off solenoid valve 5 is opened, the pressure-reducing solenoid valve 7 is closed, and the brake fluid flowing into the reservoir 8 is returned to the master cylinder 2 through the reflux path 6.

  FIG. 1 shows an example of a brake device for a motorcycle according to the present invention in a use state. The illustrated motorcycle brake device includes a disk rotor D that rotates integrally with the wheel W, a pair of opposed brake pads (P, P in FIGS. 5 and 6) that are in sliding contact with both surfaces of the disk rotor, and a caliper integrated ABS 11. It has.

  The appearance of an exemplary caliper integrated ABS 11 is shown in FIGS. The illustrated caliper-integrated ABS 11 is a combination of a floating caliper 12 and an ABS unit (pumpless antilock modulator) 13.

  The ABS unit 13 is a hydraulic pressure in which the shut-off solenoid valve 5, the pressure-reducing solenoid valve 7 and the reservoir 8 shown in FIG. 8 are assembled in a metal housing 15a (see FIGS. 1 to 3, 5, and 6). The control unit 15 is combined with the electronic control unit 16 in which the circuit board 17 on which the electronic control device 10 of FIG. 8 is mounted is housed in a case 16a.

  The case 16a also serves as a lid that covers the drive coil (not shown) of the shut-off solenoid valve 5 and the pressure-reducing solenoid valve 7 assembled inside the housing 15a.

  The caliper 12 includes an actuator portion 12a, a reaction portion 12b, and a bridge portion 12c that bridges the disk rotor D (see FIG. 1) and connects the actuator portion 12a and the reaction portion 12b.

  The illustrated actuator portion 12a of the caliper 12 includes a cylinder and a brake piston (not shown) inserted therein. This corresponds to the wheel cylinder 3 of FIG.

  The illustrated reaction portion 12b of the caliper 12 is a claw provided on the caliper so as to face the cylinder of the actuator portion 12a.

  The caliper 12 is supported by the fixing member 14 so as to be slidable in the disk axial direction. The caliper in the illustrated brake device is supported by inserting the guide pins 14a and 14b in the disk axial direction provided in the fixing member 14 slidably into the guide holes provided in the caliper. However, the caliper is limited to this support structure. Is not to be done.

  The caliper-integrated ABS 11 shown in FIG. 1 has a reaction portion 12b (caliper claw) inserted between the wheel W and the disc rotor D shown in FIG. 1, and the actuator portion 12a is located outside the disc rotor D in the axle direction. To place. For this purpose, the hydraulic control unit 15 is arranged on the caliper actuator 12a side, and the electronic control unit 16 is arranged on the outer periphery of the caliper bridge 12c.

  As a result, the hydraulic pressure control unit 15 including the highly rigid housing 15a is exposed to the outside, and foreign matter such as scattering from the electronic control unit 16 having a low rigidity case made of resin or aluminum collides with it. Therefore, the caliper-integrated ABS 11 can withstand use in a bad environment.

  The housing 15a of the illustrated hydraulic control unit 15 is formed integrally with the caliper 12, and the caliper integrated ABS 11 is also downsized.

  Further, in the illustrated caliper integrated type ABS 11, the housing 15a integrated with the caliper is disposed in a region extending from the outer periphery of the caliper actuator portion 12a to the outer periphery of the bridge portion 12c. For this reason, the caliper 12 is reinforced by the housing 15a. In addition, an effect of suppressing the caliper opening phenomenon (a phenomenon of bending so as to open the disk groove) when receiving a braking force can be expected.

  Furthermore, by forming the housing 15a integrally with the caliper 12, the heat capacity of the caliper is increased and heat dissipation is improved.

  As shown in FIG. 7, the shut-off solenoid valve 5, the pressure-reducing solenoid valve 7 and the reservoir 8 are arranged in a horizontal row (vertical row in the use state of FIG. 1) inside the housing 15a and assembled from the same direction. preferable. The shut-off solenoid valve 5 is assembled in the assembly hole H1 in FIG. 7, the pressure-reducing solenoid valve 7 is assembled in the assembly hole H2 in FIG. 7, and the assembly hole H3 in FIG. .

  Such a layout is advantageous because it is easy to assemble, and the internal oil passage is easy to process. When the reservoir 8 is disposed at a position below the pressure reducing electromagnetic valve 7 in the gravitational direction when the caliper-integrated ABS of FIG. 1 is used, the brake fluid discharged from the wheel cylinder 3 easily flows into the reservoir 8.

  In addition, the wheel of the two-wheeled vehicle used as the object of ABS control is not limited to a front wheel. Rear wheel braking can also be performed using a caliper-integrated ABS as exemplified.

  Although the illustrated brake device employs a floating type caliper, the object of the present invention can be achieved by using a piston-facing type caliper in which the aforementioned reaction part is also configured as an actuator part. The

DESCRIPTION OF SYMBOLS 1 Brake lever 2 Master cylinder 3 Wheel cylinder 4 Main flow path 5 Shut off solenoid valve 6 Recirculation path 7 Depressurization solenoid valve 8 Reservoir 9 Check valve 10 Electronic controller 11 Caliper integrated ABS
12 Caliper 12a Actuator section 12b Reaction section 12c Bridge section 13 ABS unit 14 Fixing member 14a, 14b Guide pin 15 Hydraulic control unit 15a Housing 16 Electronic control unit 16a Case 17 Circuit board H1-H3 Assembly hole W Wheel D Disk rotor

Claims (4)

A brake device for a motorcycle including an anti-lock modulator that controls the hydraulic pressure of a wheel cylinder to avoid locking of the wheel, and a pair of opposed rotors that rotate integrally with the wheel, and that are in sliding contact with both surfaces of the disk rotor A brake pad and a caliper provided with an actuator portion that presses the brake pad,
The anti-lock modulator that combines a hydraulic control unit having at least a control valve for pressure reduction inside a housing and an electronic control unit in which a circuit board having a control circuit for hydraulic pressure is housed in a case is provided. A brake device for a two-wheeled vehicle integrated with the caliper by disposing the control unit on the outside in the axle direction and the electronic control unit on the inside in the axle direction with respect to the hydraulic pressure control unit.   The caliper includes the actuator unit, a reaction unit facing the actuator unit, and a bridge unit that straddles the disk rotor and connects the actuator unit and the reaction unit. The pressure control unit is disposed on the outer periphery of the bridge portion, the electronic control unit is disposed, the reaction portion enters between the wheel and the disk rotor, and the actuator portion is located outside the disk rotor in the axle direction. The motorcycle brake device according to claim 1, wherein the caliper is mounted on a vehicle in a posture.   The actuator unit is configured by inserting a hydraulically operated brake piston into the cylinder, the reaction unit is configured by a caliper claw facing the cylinder, and the caliper straddles the cylinder and the claw across the disk rotor. A floating caliper connected by a bridge portion, the hydraulic pressure control unit is arranged on the cylinder side of the floating caliper, and the electronic control unit is arranged on the outer periphery of the bridge portion, and the caliper claw is arranged on the wheel. The brake device for a two-wheeled vehicle according to claim 1 or 2, wherein the brake device is mounted on a vehicle so that the cylinder enters between the disc rotor and the cylinder is positioned outside the disc rotor in an axle direction direction.   4. The two-wheeled vehicle brake device according to claim 2, wherein a housing of the hydraulic pressure control unit is formed integrally with the caliper and disposed in a region extending from an outer periphery of the actuator portion of the caliper to an outer periphery of the bridge portion. 5.

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