JPH0648360A - Rear wheel brake for motorcycle - Google Patents

Abstract

PURPOSE:To reduce the cost by reducing the number of the component part items of a vehicle body frame and welding places and dispose a reserver tank near a master cylinder. CONSTITUTION:In a device in which a master cylinder 29 to conduct the hydraulic operation of a brake and a reserver tank 35 to replenish a brake fluid into the master cylinder 29 are connected to each other through a reserver hose 37 and a protection cover 33 is provided at the outer side part of the master cylinder 29, the reserver tank 35 is fitted to the protection cover 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear wheel braking system for a motorcycle having an improved reservoir tank installation structure.

[0002]

2. Description of the Related Art In a motorcycle having hydraulically operated disc brakes on its rear wheels, a brake pedal 102 is generally rotatable on a base of a footrest 101 provided on a footrest bracket 100 on the right side of a vehicle body, as shown in FIG. The brake pedal 102 is pivotally attached to the action point 102 of the brake pedal 102.
a is connected to the master cylinder 103 fixed to the footrest bracket 100. A brake hose 104 extending from the master cylinder 103 is arranged along the swing arm 105 and the like, and is connected to a caliper of a disc brake provided on a rear wheel (not shown).

A reservoir tank 106 for replenishing the brake fluid in the master cylinder 103 is a tank stay 10 provided on a vehicle body frame 107 as shown in FIG.
8 and is arranged above the master cylinder 103, and is connected to the master cylinder 103 by a reservoir hose 109.

A protection cover 110 covers the master cylinder 103 and the outer sides of the brake hose 104, the reservoir hose 109 and the like in the vicinity thereof. The protection cover 110 is fixed near the footrest 101,
The purpose of this is to prevent the foot of the rider placed on the vehicle from interfering with the master cylinder 103, the brake hose 104, the reservoir hose 109 and the like, and to protect the master cylinder 103 and the like from damage when the motorcycle falls.

[0005]

By the way, the tank stay 108 to which the reservoir tank 106 is attached is generally fixed to the vehicle body frame 107 by welding. However, for this reason the body frame 107
The number of component parts and the number of welded parts increased and the cost increased. In addition, the cost for manufacturing a press die for press-molding the tank stay 108, a positioning jig used for welding, and the like is high.

Further, there is a problem that the reservoir tank 106 is apt to be located away from the master cylinder 103, and the reservoir hose 109 becomes long and compact.

The present invention has been made in order to solve the above-mentioned problems, and reduces the number of constituent parts of the vehicle body frame and the welding points to reduce the cost, and arranges the reservoir tank in the vicinity of the master cylinder. An object of the present invention is to provide a rear-wheel brake device for a motorcycle that can be used.

[0008]

In order to achieve the above object, a rear wheel brake system for a motorcycle according to the present invention comprises a master cylinder for hydraulically operating a brake, and a reservoir tank for replenishing the master cylinder with brake fluid. Is connected by a reservoir hose, and a rear wheel brake device of a motorcycle having a protection cover provided on the outer side of the master cylinder is characterized in that the reservoir tank is attached to the protection cover.

[0009]

With this structure, it is not necessary to weld a stay or the like for mounting the reservoir tank to the vehicle body frame, and the number of constituent parts of the vehicle body frame and the number of welding points are reduced.

Further, it becomes possible to arrange the reservoir tank close to the master cylinder.

[0011]

EXAMPLES An example of the present invention will be described below.

FIG. 3 is a schematic right side view of a motorcycle to which an embodiment of the present invention is applied. The body frame 2 of the motorcycle 1 is composed of, for example, a main frame 3 and a seat frame 4 extending rearward of the main frame 3. A fuel tank 5 and an engine 6 are installed above and below the main frame 3, respectively. A seating seat 7, a pillion seat 8 and the like are placed.

A front fork 10, together with a front wheel 11 and a handlebar 12, is pivotally attached to the front portion of the vehicle body frame 2 so as to be rotatable left and right. A pivot shaft 13 is installed in the middle of the body frame 2 in the vehicle width direction, and a swing arm 14 extending rearward is pivotally supported on the pivot shaft 13 so as to be vertically rotatable, and a rear wheel is attached to a free end of the swing arm 14. 15 is pivotally supported. A suspension device 19 including a shock absorber 16 and links 17 and 18 is provided at the base end of the swing arm 14.

A hydraulically actuated disc brake 21 is installed on the rear wheel 15. The disc brake 21 is composed of a disc rotor 22 mounted on the rear wheel 15 so as to rotate integrally therewith, and a caliper 23 sandwiching the disc rotor 22. The caliper 23 is provided at the free end of the swing arm 14 and has a torque rod 24.
The rotation is restricted by.

A pair of left and right footrest brackets 25 are fixed to the vehicle body frame 2 by bolting or the like, and a footrest 26 on which the rider's feet are placed is provided at the rear end of the footrest bracket 25.

FIG. 1 shows the right footrest bracket 2
FIG. 5 is a side view showing a configuration of parts around 5 and shows an embodiment of a rear wheel braking device 27 according to the present invention. 2 is a front view taken along the arrow II in FIG.

A brake pedal 28 is pivotally attached to the base of the footrest 26 so as to be rotatable around the footrest 26. Further, a master cylinder 29 for hydraulically operating the disc brake 21 is fixed to an upper portion of the footrest bracket 25 by a bolt 31 or the like,
An action point 28a of the brake pedal 28 is connected to the master cylinder 29.

The brake hose 32 extending from the master cylinder 29 extends rearward along the swing arm 14 and the like, and is connected to the caliper 23. Brake fluid is injected into the brake hose 32 and the master cylinder 29.

When the rider depresses the brake pedal 28, the pressure in the master cylinder 29 increases, and this pressure is transmitted to the caliper 23 by the brake hose 32.
The rear wheel 1 with the caliper 23 sandwiching the disc rotor 22
Brakes the rotation of 5.

A protection cover 33 is provided on the outer side of the master cylinder 29 so that the feet of the rider do not interfere with the master cylinder 29, the brake hose 32 and the like. The protection cover 33 is fastened together with the master cylinder 29 to the footrest bracket 25 by bolts 31 for fixing the master cylinder 29, for example. Further, a hose guard 34 is provided at the rear of the protection cover 33 and a footrest bracket 2 is provided.
5 is provided integrally or integrally. The protection cover 33 is attached to the footrest bracket 2
5, the protection cover 33 and the hose guard 34 may be integrated.

A reservoir tank 35 for replenishing the brake fluid in the master cylinder 29 is attached to the free end of the protection cover 33. At the free end of the protection cover 33, for example, a notch 33a is formed along the shape of the reservoir tank 35, and the mounting flange 35a of the reservoir tank 35 is superposed on the notch 33a and is fixed by a bolt 36 or the like. .

A reservoir hose 37 extending from the lower surface of the reservoir tank 35 passes through the inside of the protection cover 33 and is connected to the master cylinder 29. And
Brake fluid is stored in the reservoir tank 35, and this brake fluid is replenished in the master cylinder 29.

With the above-mentioned structure, it is not necessary to weld a stay for attaching the reservoir tank 35 to the vehicle body frame 2 as in the conventional case, and the number of constituent parts of the vehicle body frame 2 and the welding points can be reduced. The cost can be reduced. Further, since a press die for manufacturing the stay and the like and a positioning jig for welding are unnecessary,
From these points as well, cost reduction can be achieved.

Furthermore, since the reservoir tank 35 can be arranged close to the master cylinder 29, the periphery of the reservoir tank 35 can be compactly formed, and at the same time, the reservoir hose 37 can be shortened to reduce the cost and improve the appearance. Can be planned.

The reservoir tank 35 can be made inconspicuous by, for example, attaching it to the back surface side of the protection cover 33 to further improve the appearance.

[0026]

As described above, in the rear wheel braking system of the motorcycle according to the present invention, the master cylinder for hydraulically operating the brake and the reservoir tank for supplementing the brake fluid in the master cylinder are reservoir hoses. A rear wheel brake device of a motorcycle, which is connected and has a protection cover provided outside a master cylinder, is characterized in that the reservoir tank is attached to the protection cover.

Therefore, it is not necessary to weld a stay or the like for mounting the reservoir tank to the vehicle body frame, and the number of constituent parts of the vehicle body frame and the welding points can be reduced to reduce the cost.

Further, since the reservoir tank can be arranged in the vicinity of the master cylinder, the periphery of the reservoir tank can be compactly formed, and at the same time, the reservoir hose can be shortened to reduce the cost and improve the appearance. .

[Brief description of drawings]

FIG. 1 is a side view of a right footrest bracket showing an embodiment of the present invention.

FIG. 2 is a front view taken along the line II of FIG.

FIG. 3 is a schematic right side view of a motorcycle to which an embodiment of the present invention has been applied.

FIG. 4 is a side view of a footrest bracket showing a conventional technique.

5 is a front view taken along the arrow V in FIG.

[Explanation of symbols]

 1 Motorcycle 2 Body Frame 14 Swing Arm 21 Disc Brake 25 Footrest Bracket 26 Footrest 27 Rear Wheel Braking Device 28 Brake Pedal 29 Master Cylinder 31, 36 Bolt 32 Brake Hose 33 Protection Cover 35 Reservoir Tank 37 Reservoir Hose

Claims (1)

[Claims] 1. A motorcycle in which a master cylinder for hydraulically operating a brake and a reservoir tank for replenishing the brake fluid in the master cylinder are connected by a reservoir hose, and a protection cover is provided outside the master cylinder. A rear wheel braking device for a motorcycle, wherein the reservoir tank is attached to the protection cover.