KR20010094977A - A front and rear wheel brake interlocking device for vehicle - Google Patents

Abstract

PURPOSE: To provide an interlocking device of simple constitution capable of actuating a front wheel brake as well as a rear wheel brake when actuating a brake pedal in a motorcycle. CONSTITUTION: A master cylinder 20 capable of hydraulically actuating the rear wheel brake Br is mounted to a vehicle body 8, and a knocker 31 journalled to the master cylinder 20 abuts on a piston 23 so as to push it. A first actuating lever 32 and a second actuating lever 33 journalled to the master cylinder 20 separably abut on the knocker 31 so as to push the piston 23 through the knocker 31. A brake lever 2 and the brake pedal 3 are connected to the first actuating lever 32 and the second actuating lever 33 respectively through a front brake wire 4 and an interlocking brake wire 6.

Description

Front and rear wheel brake interlock for vehicle {A FRONT AND REAR WHEEL BRAKE INTERLOCKING DEVICE FOR VEHICLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a vehicle brake apparatus in which a brake lever for operating a front wheel brake is axially supported on a steering wheel while a brake pedal for activating a rear wheel brake is axially supported at a lower portion of a vehicle body. The present invention relates to a vehicle front and rear brake interlock for enabling not only rear wheel brakes but also front wheel brakes.

Background Art A conventional brake device for a vehicle in which a brake lever for operating a front wheel brake is supported by a lever holder of a steering wheel while a brake pedal for operating a rear wheel brake is supported by an axis in a lower part of a vehicle body. A master cylinder for hydraulically actuating the brake is attached, and the piston of the master cylinder can be pressurized by the brake lever through the knocker, and the interlock brake wire is connected between the knocker and the brake pedal. At the time of operation of the pedal, there is a known front and rear brake interlock which allows the rear wheel brake to be operated, and only the knocker is swung to operate the master cylinder, and the front wheel brake is also operated by the output hydraulic pressure. Reference).

However, since the distance between the steering wheel and the brake pedal is very long, a very long interlocking brake wire is required to connect between the brake pedal and the knocker of the master cylinder installed on the steering wheel as in the conventional apparatus. Since the bending part becomes many wire arrangement | positioning, there exists a fall of the transmission efficiency of operation force, and it is unpreferable.

An object of the present invention is to provide a front and rear brake interlock device capable of operating not only a rear wheel brake but also a front wheel brake when the brake pedal is operated.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall schematic view of a brake device for a motorcycle having a front wheel brake interlock device according to the present invention;

Figure 2 is a longitudinal sectional side view of the main portion of the front and rear brake interlock;

3 is an enlarged sectional view taken along line 3-3 of FIG. 2;

4 is an enlarged cross-sectional view taken along line 4-4 of FIG. 2;

5 is an explanatory view of an operation corresponding to FIG. 2;

6 is an explanatory view of the operation in another state.

<Description of the symbols for the main parts of the drawings>

Bf: front wheel brake Br: rear wheel brake

D: Front and rear brake interlock device 1: Steering handle

2: brake lever 3: brake pedal

4: front brake wire 5: rear brake wire

6: interlocking brake wire 8: body

8h: head pipe 20: master cylinder

23: piston 31: knocker

32: first operating lever 33: second operating lever

34: Pivot

In order to achieve the above object, the present invention provides a vehicle brake apparatus that supports a brake for operating the front wheel brake to the steering wheel, while supporting a brake pedal for operating the rear wheel brake to the lower portion of the vehicle body, A master cylinder capable of hydraulically actuating the front wheel brake is installed on the lower body of the steering wheel, and the outer end of the piston of the master cylinder is brought into contact with the knocker freely supported by the shaft to the master cylinder so that it can be pressurized. And the first operating lever and the second operating lever pivotally supported on the master cylinder so as to be able to pressurize the piston through the knocker to each other so as to be spaced apart from each other, and the first operating lever and Front brake with brake lever and brake pedal to second actuating lever It is a 1st characteristic that it connected respectively via the wire and the interlocking brake wire.

According to this first feature, when only the brake lever 2 is operated, the first actuating lever pressurizes the piston of the master cylinder through the knocker, and the front wheel brake can be operated by the hydraulic pressure generated accordingly. In the meantime, since the knocker is separated from the contact portion with the second operating lever, the operating force of the brake lever is not transmitted to the brake pedal, so that the rear wheel brake can be kept in an inoperative state.

In addition, when only the brake pedal is operated, the rear wheel brake is actuated, the second actuating lever is swung through the interlocking brake wire, the piston of the master cylinder is pressed by the knocker, and the front wheel brake is operated by the generated hydraulic pressure. It can work. In the meantime, since the knocker is separated from the contact with the first actuating lever at this time, the operating force of the brake pedal is not transmitted to the brake lever.

By the way, since the interlocking brake wire is connected to the second actuating lever which is axially supported by the lower body than the steering wheel, the interlocking brake wire can be made relatively short, and at the same time, the transfer efficiency of the operating force is due to the arrangement of the wires with less bending. Can be suppressed.

In addition to the above features, the present invention is characterized in that the knocker, the first actuating lever and the second actuating lever are supported on the master cylinder by a common pivot.

According to this second feature, the common structure of the pivot can simplify the support structure of the knocker, the first operating lever, and the second operating lever.

Embodiment of the Invention

EMBODIMENT OF THE INVENTION Embodiment of this invention is described below according to the Example of this invention shown in an accompanying drawing.

1 is an overall schematic view of a brake apparatus for a motorcycle having a front wheel brake interlock according to the present invention, FIG. 2 is a longitudinal sectional side view of the main portion of the front wheel brake interlock, and FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 2, FIG. 5 is an explanatory view of the operation corresponding to FIG. 2, and FIG.

First, in Fig. 1, the lever holder 10 is fixedly mounted to the steering wheel 1 of the motorcycle, adjacent to the right grip 1a, and the brake lever 2 is supported by the shaft. The lever 2 is connected to the front wheel brake Bf via the front brake wire 4 and the front wheel brake interlock device D. FIG. This front wheel brake Bf is constituted by a disc brake in the illustrated example.

The brake pedal 3 is supported by the shaft at the lower part of the vehicle body 8, and this brake pedal 3 is connected to the operation lever 7 of the drum type rear wheel brake Br via the rear brake wire 5. The brake pedal 3 is also connected to the front wheel brake Bf via the front and rear brake interlock device D including the interlocking brake wire 6.

To the brake lever 2 and the brake pedal 3, return springs 11 and 12 which force them in the retraction direction are connected, respectively. In addition, a return spring 14 is also connected to the actuation lever 7 of the rear wheel brake Br to force them in the retraction direction.

The front and rear wheel linkage device D will be described with reference to Figs.

As shown in Fig. 2, the vehicle body 8 includes a head pipe 8h for steerably supporting the steering handle 1 and a main frame 8m extending downward from the head pipe 8h. The master cylinder is attached to one side of the head pipe 8h.

The master cylinder 20 swings and fits freely in the cylinder body 21, the cylinder hole 21a of this cylinder body 21, and the piston 23 which partitions the hydraulic chamber 22 in the inside, It has a conventionally conventional configuration with a return spring 24 housed in the hydraulic chamber 22 and forcing the piston 23 towards its retraction limit. The retraction limit of the piston 23 is defined by the annular shoulder portion 23a formed in the middle portion of the piston 23 in contact with the annular stopper 25 that is caught by the opening end of the cylinder hole 21a. An elastic boot 26 covering the protrusion of the piston 23 is provided between the outer end projecting out of the cylinder hole 21a of the piston 23 and the cylinder body 21. And the cylinder body 21 is fixedly attached to the one side surface of the head pipe 8f by the bolt 29 toward the outer edge part of the piston 23 below. The upper part of the cylinder body 21 is provided with an output port 27 continuous to the hydraulic chamber 22, and an upstream end of the hydraulic conduit 28 is connected thereto.

In addition, the cylinder body 21 is integrally formed with a lever holder 30 protruding rearward from the lower end thereof, and the knocker 31, the first actuating lever 32 and the second actuation are formed in the lever holder 30. The lever 33 is swingably attached by the common pivot 34.

The knocker 31 actuates the piston 23 and is arranged such that the front end is in contact with the outer end, ie, the lower end, of the piston 23.

The first actuating lever 32 cuts down the master cylinder 20 laterally and extends to the front thereof, and a contact portion 32a which is in contact with the lower surface of the tip of the knocker 31 and is opposed to the middle portion thereof so as to be spaced apart. Is formed. The connection hole 35 is formed in the front-end | tip of the 1st actuating lever 32, and the connector 4a of the other end of the front brake wire 4 which connected one end to the said brake lever 2 is fitted in this. In this way, the brake lever 2 and the first actuating lever 32 are connected via the front brake wire 4.

The second actuating lever 33 is arranged to extend below the pivot 34. A circular contact surface 33a at the rear end of the lower end of the second actuating lever 33 and an arcuate surface centered around the pivot 34 extending from the lower end of the contacting face 33a to the lower end of the actuating lever 33. 33b) is formed, and the contact piece 31a, which is bent from the rear end of the knocker 31 to the second operating lever 33 side, is replaced on the contact surface 33a. Therefore, when the second actuating lever 33 is oscillated backward, the contact surface 33a can be in contact with the contact piece 31a to rock the knocker 31 in the operating direction of the piston 23, and the knocker 31 is When it swings in the operation direction of the piston 23 from the 1st operating lever 32 side, the contact piece 31a is isolate | separated from the contact surface 33a, and is moved to the arc surface 33b side.

The connection hole 36 is formed in the front-end | tip of the 2nd actuating lever 33, and the connector 6a of the other end of the interlocking brake wire 6 which connected the one end to the said brake pedal 3 is fitted in this. In this way, the brake pedal 3 and the second actuating lever 33 are connected via the interlocking brake wire 6. This interlocking brake wire 6 is arranged along the side of the main frame 8 that couples the front end to the head pipe 8h.

An equalizer 40 capable of distributing the operating force to the brake pedal 3 to both brake wires 5 and 6 at a constant ratio at the connection portion between the brake pedal 3 and the rear brake wire 5 and the interlocking brake wire 6. (See Fig. 1) is mounted therebetween.

Each of the brake wires 4, 5, 6 is inserted into and disposed in flexible guide tubes 37, 38, 39 whose both ends are supported by the fixing portion.

Next, the operation of this embodiment will be described.

In the stop state of the brake lever 2 and the brake pedal 3, as shown in FIG. 2, the tip of the knocker 31 is normally provided at the lower end of the piston 23 located at the retraction limit of the master cylinder 20. As shown in FIG. The contact portion 32a of the first actuating lever 32 is in contact with the lower surface of the knocker 31, and the contact surface 33a of the second actuating lever 33 is in contact with the contact piece 31a of the knocker 31. have. Such a state can be obtained by adjusting the end positions of the guide tubes 37 and 39 of the respective brake wires 4 and 6.

Here, when only the brake lever 2 is operated, the first actuating lever 32 is pulled up along the knocker 31 through the front brake wire 4, as shown in FIG. 5, and around the pivot 34. As shown in FIG. Because the rocker swings upward in the above manner, the knocker 31 pressurizes the piston 23 of the master cylinder 20 upwardly to generate hydraulic pressure in the hydraulic chamber 22. Since the hydraulic pressure thereof is supplied from the output port 27 to the wheel cylinder of the front wheel brake Bf through the hydraulic conduit 28, the front wheel brake Bf can be operated.

In the meantime, the contact piece 31a of the knocker 31 swings so as to recede from the contact surface 33a of the second actuating lever 33 to the arc surface 33b side, so that the second actuating lever 33 is left. . Therefore, the operation force of the brake lever 2 is not transmitted to the second actuating lever 33, the interlocking brake wire 6, and the brake pedal 3, so that the inactive state of the rear wheel brake Br is maintained.

When the operating force is released from the brake lever 2, the rebound force of the return spring 11 of the brake lever 2 and the return spring 24 of the piston 23 extends from the brake lever 2 to the piston 23. The member can return to the original stop position and return the front wheel brake Bf to an inoperative state.

Next, when only the brake pedal 3 is operated, the operating force is distributed to the rear brake wire 5 and the interlocking brake wire 6 via the equalizer 40 as traction force. The traction force distributed to the rear brake wire 5 acts on the actuation lever 7 and swings it in the actuation direction, so that the rear wheel brake Br can be activated.

On the other hand, when the traction force distributed to the interlocking brake wire 6 acts on the second actuating lever 33 and swings it around the pivot 34, the contact surface 33a of the second actuating lever 33 is knocked. Since the contact piece 31a of 31 is pressed, it tries to pressurize the piston 23 of the master cylinder 20 upward along the knocker 31, but rocking of the 2nd operating lever 33 When the torque falls below the return torque applied by the return spring 24 of the piston 23 to the knocker 31, the piston 23 is stopped at the retraction limit. When the rocking torque exceeds the return torque by the return spring 24, the second actuating lever 33 swings backward along the knocker 31, as shown in Fig. 6, and the master cylinder 20 The piston 23 of the () is pressed upward, and the front wheel brake Bf can be operated with the hydraulic pressure generated in the hydraulic chamber 22.

In this way, by operating only the brake pedal 3, the rear wheel brake Br can be operated ahead of time, and the front wheel brake Bf can be operated with a slight time-lag, thereby The front and rear wheels can be braked at substantially the same time while suppressing the nose dive.

In the meantime, the knocker 31 for pressurizing the piston 23 is separated from the contact portion 32a of the first actuating lever 32 and leaves the first actuating lever 32, so that the brake lever 2 The stop position can be maintained.

When the operating force is released from the brake pedal 3, by the repulsive force of the return spring 12 of the brake pedal 3, the return spring 24 of the piston 23 and the return spring 14 of the actuating lever 7, The brake pedal 3 and the piston 23 return to the original stop position, and can return the front wheel brake Bf and the rear wheel brake Br to an inoperative state.

When the brake lever 2 and the brake pedal 3 are operated at the same time, these operating forces are added to the piston 23 through the knocker 31 from the first and second actuating levers 32 and 33, so that the front wheel The brake Bf can be operated strongly.

By the way, the master cylinder 20 is installed in the side of the head pipe 8h, and the knocker 31, the 1st operating lever 32, and the 2nd operation to the lever holder 30 installed in connection with the cylinder body 21 are carried out. The lever 33 is supported by the shaft, and the brake lever 2 and the first actuating lever 32 are connected via the front brake wire 4, and also the brake pedal 3 and the second actuating lever 33. The interlocking brake wires 6 are connected through the interlocking brake wires 6, and the interlocking brake wires 6 are arranged along one side of the main frame 8, so that the interlocking brake wires 6, which tend to be particularly long, have the shortest length. It becomes possible to arrange | position easily to one side of the frame 8, and can not only avoid interference with another object, but can also suppress the fall of the transmission efficiency of operation force by wire arrangement with little bending.

In addition, since the knocker, the first actuating lever 32 and the second actuating lever 33 are supported by the lever holder 30 by a common pivot 34, one pivot 34 is sufficient so that Simplification can be achieved.

This invention is not limited to the said Example, A various design change is possible in the range which does not deviate from the summary. For example, the rear wheel brake Br can also be a disc brake. The first actuating lever 32, the second actuating lever 33 and the knocker 31 may be supported by the main frame 8m directly on the shaft. The present invention is not limited to a motorcycle, but is also applicable to a three-wheeled or four-wheeled light vehicle provided with a brake lever and a brake pedal.

According to the first aspect of the present invention as described above, the brake device for a vehicle which supports the brake lever for operating the front wheel brake to the steering wheel while supporting the brake pedal for operating the rear wheel brake to the lower part of the vehicle body. In the knocker, a master cylinder capable of hydraulically actuating the front wheel brake is attached to the vehicle body below the steering wheel, and the shaft is freely pivotally supported on the master cylinder so as to pressurize it to the outer end of the piston of the master cylinder. The first actuating lever and the second actuating lever pivotally supported on the master cylinder so as to be able to pressurize the piston through the knocker so that the first actuating lever and the second actuating lever are spaced apart from each other, The lever and the second actuating lever include a brake lever and a brake pedal on the front bra Since only the brake lever 2 is operated, the first actuating lever pressurizes the piston of the master cylinder through the knocker, and the front wheel brake is operated by the generated hydraulic pressure. In the meantime, since the knocker is spaced apart from the contact with the second actuating lever, the operating force of the brake lever is not transmitted to the brake pedal.

In addition, when only the brake pedal is operated, the rear wheel brake is operated, the second actuating lever is rotated through the interlocking brake wire, the piston of the master cylinder is actuated by the knocker, and the front wheel brake is generated by the hydraulic pressure generated accordingly. In the meantime, since the knocker is separated from the contact portion with the first actuating lever, the operating force of the brake pedal is not transmitted to the brake lever, thereby maintaining the non-operating state of the front wheel brake.

In addition, since the interlocking brake wire is connected to the second operating lever supported by the shaft on the lower body of the steering wheel than the steering wheel, the interlocking brake wire can be made relatively short, and at the same time, the transfer efficiency of the operating force is reduced by the wire arrangement with less bending. Can be suppressed.

Further, according to the second aspect of the present invention, since the knocker, the first actuating lever, and the second actuating lever are supported on the master cylinder by a common pivot, the knocker, the first actuating lever, and the second actuation are common by the pivoting. The supporting structure of the operation lever can be simplified.

Claims (2)

The brake lever 2 for operating the front wheel brake Bf is supported by the steering wheel 1 as a shaft, while the brake pedal 3 for operating the rear wheel brake Br is mounted on the lower part of the vehicle body 8. In the vehicle brake device supported by A master cylinder 20 capable of hydraulically actuating the front wheel brake Bf is provided on the vehicle body 8 below the steering wheel 8h, and is pressed against the outer end of the piston 23 of the master cylinder 20. In order to operate, the master cylinder 20 is brought into contact with the knocker 31 which is freely supported by the shaft, and the knocker 31 is pressurized to actuate the piston 23 through the knocker 31, respectively. , The first actuating lever 32 and the second actuating lever 33 supported by the master cylinder 20 to swing freely axially so as to be spaced apart from each other, and the first actuating lever 32 and the second actuating lever 33. The brake lever (2) and the brake pedal (3) is connected to the front and rear brake brakes for a vehicle, characterized in that via the front brake wire (4) and the interlocking brake wire (6), respectively. The vehicle front and rear brake interlock device according to claim 1, wherein the knocker (31), the first operating lever and the second operating lever (33) are supported on the master cylinder (20) by a common pivot (34). .