JPH0220488A - Arrangement structure for disk brake of motorcycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention A1 Object of the Invention (1) Industrial Application Field The present invention provides for supporting both ends of an axle passing through a hub of a wheel by a pair of first and second fork legs. The present invention relates to an improvement in a disc brake arrangement structure for a motorcycle in which a first disc brake is arranged between a fork leg and a wheel, and a second disc brake is arranged between a second fork leg and a wheel.

(2) Conventional technology Conventionally, when a motorcycle is equipped with a pair of disc brakes on both sides of a wheel, both disc brakes are arranged to face each other on the same axis with the wheel in between (for example, in practice (Refer to Japanese Patent Publication No. 1983-124051).

(3) Problems to be Solved by the Invention In the disc brake arrangement structure as described in item 2, in order to minimize the amount of protrusion of each disc brake to the side of the wheel, a recess is provided to receive the caliper of each disc brake. Even if an attempt is made to form a recess on both sides of the wheel, it is difficult to form it deep because it interferes with the recess on the other side, and this also reduces the amount of protrusion of each disc brake from the side of the wheel. There was a limit.

If the amount of protrusion of each disc brake to the side of the wheel is large,
The distance between the left and right fork legs that support the calipers must necessarily be widened, leading to an increase in the size of the entire fork.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disc brake arrangement structure for a motorcycle that can reduce the amount of protrusion of each disc brake to the side of the wheel and contribute to downsizing of the fork. With the goal.

B1 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a first annular recess on one side of the wheel and an annular recess surrounded by the first recess on the other side. The caliper of the first disc brake I/- is received in the first recess, and the caliper of the second disc brake I/- is received in the second recess. It is characterized by being attached to the first and second fork legs at different distances from each other.

(2) Effect According to the above configuration, since the first and second recesses are arranged concentrically, each recess can be formed sufficiently deep without being interfered with by the other recess. By deeply receiving the calipers of the first and second disc brakes in the recessed portion, the amount by which they protrude to the side of the wheel can be reduced.

(3) Examples Embodiments of the present invention will be described below with reference to the drawings.

First, in FIG. 1 showing a first embodiment of the present invention, a motorcycle 1 has a pair of first and second front disc brakes Bf+, Bfz for braking a front wheel Wf, and a rear wheel Wf.
The vehicle is equipped with one roller disc brake Br for the vehicle r. Both front disc brakes Bf,, Bf,
The rear disc brake Br is connected in parallel to the output boat of a manual front mask cylinder Mf attached to the steering handle 2 via a hydraulic conduit 3, and the rear disc brake Br is connected to the output boat of a foot operated rear master cylinder Mr attached to the vehicle body 4. via a hydraulic conduit 5.

The arrangement structure of the first and second front disc brakes Bf, , Bf will be explained with reference to FIG.

The front fork 6 of the motorcycle l includes first and second fork legs 6+, 6 disposed on both left and right sides of the front wheel Wf.
The axle 7, which has both ends fixedly supported by the lower ends of both fork legs 61.6t, rotatably supports the hub 8 of the front wheel Wf via a bearing 11.

The front wheel Wf has a wheel disc 10 between the hub 8 and the rim 9.
It has a disc-shaped structure that is connected integrally through the
The first fork 1116 . of the wheel disc 10 .
An annular first recess 12+ facing a part of the inner circumferential surface of the rim 9 is formed on one side facing the second fork, [g
On the other side facing the first recess 12. surrounded by hub 8
An annular second recess 122 facing a part of the outer circumferential surface is formed.

Caliper of the first front disc brake B f +! 3. , the half of which is inserted into the first recessed portion 12 . and the first fork JII6. It is fixed with bolt 14+.

This caliper 13. Hydraulic cylinders 161, 161 communicate with the hydraulic conduit 3 to the left and right pinch arms 15t, 15+.
These hydraulic cylinders 16+, 16i
includes a pair of friction pads 171.17. Pistons 1B+ and 1B+ facing each other with the two sides in between are housed. Friction pads IL, IL are caliper 13. Hangabin fixed to 19. Both friction pads 1.7. ．． 17. Brake disc 20 intervening between.
are the first and second recesses 12. ．． Partition wall 21 between 12□
A bolt 23 is attached to a boss 22 protruding from one end surface of the . It is fixed in place.

Also, the caliper 13 of the second front disc brake Bf. is fixed to the second fork leg 6□ with a bolt 14 with its half received in the second recess 122. This caliper 13□ also has left and right pinching arms 15□, 15. is equipped with hydraulic cylinders 16□, 16□ communicating with the hydraulic conduit 3, and these hydraulic cylinders 16□, 16. , pistons 18□, 18. which face each other with a pair of friction pads 17□, 17□ in between. are accommodated respectively. Friction pad 1
'L, 17! is slidably suspended from a hanger bin 19□ fixed to the caliper 13, and both friction pads 17!
, 17□ is fixed to one end surface of the hub 8 with a bolt 238.

Thus, the calipers 13 . ．． 13 are arranged at different distances from the axle 7 so as to overlap each other in the axial direction of the axle 7.

Next, the operation of this embodiment will be explained.

When the front mask cylinder Mf is operated, its output oil pressure is equal to both front disc brakes B f IBfr, (
7) Hydraulic cylinder 16. ．． 161 116x16, transmitted to piston 18. ．． 1B, ;18□, 18□ are operated forward, respectively, and the friction pad 17. ．． 17. ;17°, 17□ is the brake disc 20. ．． 20□, so both brake discs 20. ，
Braking force is applied to the front wheel Wf via 20□.

By the way, the first and second front disc brakes Bf
,, BI3 caliper 13. ．． First and second recesses 12. formed on both sides of the wheel disc 10 of the front wheel Wr to receive 1.3 g. , 128 is the former 12. is the latter 1
2z, so each recess 12°, 1
2o can be formed deeply without being interfered with by the other recesses 12g and 12+, and both calipers 13. ．． 13□ in the recess 12 so that they overlap in the axial direction of the axle 7.
,．． As a result, the amount of protrusion of each caliper 13+, 13z to the side of the front wheel Wf is significantly reduced, and both fork legs 6.
．． ．． 6. The distance between them can be reduced.

FIG. 3 shows a second embodiment of the present invention, in which the output boat of the rear master cylinder Mr is connected to the second front disc brake Bf and the rear disc brake Br via a hydraulic conduit 5, and the front mask cylinder The configuration is similar to that of the previous embodiment except that Mf is connected only to the first front disc brake Bf via the hydraulic conduit 3.

According to this embodiment, by operating only the rear master cylinder Mr, the second front disc brake Bf2 and rear disc brake! /- Activate Ki Br at the same time,
Braking force can be applied to the rear wheels Wf and Wr at the same time, and since the second front disc brake Bf is equipped with a small diameter brake disc 20□, excessive braking force is applied to the front wheel Wf even when the foot is operated. Never.

Furthermore, if both mask cylinders Mf and Mr are operated simultaneously, the braking force of the first float disc brake B f l equipped with the large-diameter brake disc 201 will be applied, so that the braking force for the front wheel W f will be effectively applied. can be strengthened.

C1 Effects of the Invention As described above, according to the present invention, an annular first recess is formed on one side of the wheel, and an annular second recess surrounded by the first recess is formed on the other side, and the first disc In order to receive the caliper of the brake in the first recess and the caliper of the second disc brake in the second recess, the calipers are placed in the first and second fork legs at different distances from the axle. Since the first and second
The first and second recesses that receive the disc brake calipers can be deeply formed on both sides of the wheel without interfering with the shingles, and the amount of protrusion of each caliper to the side of the wheel is greatly reduced. Therefore, it is possible to reduce the distance between the first and second fork legs that support both calipers, thereby making the fork more compact.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention,
Figure 1 is a side view of the motorcycle, Figure 2 is ■-■ of Figure 1.
3 is a side view similar to FIG. 1, showing a second embodiment of the present invention. Bf,,Bf,... 1st. 2nd disc brake, W
f...Front wheel 1 as a wheel...Motorcycle, 68.6□...1st. 2nd fork leg, 7... Axle, 8... Hub, 9... Rim,
10...Wheel disc, 12I, 12g...1st. second recess, 13. ．． 13□・・・Caliba

Claims (1)

[Claims] Both ends of an axle passing through the hub of the wheel are supported by a pair of first and second fork legs, a first disc brake is provided between the first fork leg and the wheel, and a first disc brake is provided between the first fork leg and the wheel, and a first disc brake is provided between the second fork leg and the wheel. In a disc brake arrangement structure for a motorcycle in which a second disc brake is respectively arranged,
forming a first annular recess on one side of the wheel and a second annular recess surrounded by the first recess on the other side;
In order to receive the caliper of the first disc brake in the first recess and the caliper of the second disc brake in the second recess, the calipers are placed in the first and second fork legs at different distances from the axle. A disc brake arrangement structure for a motorcycle, which is characterized in that each disc brake is installed on a motorcycle.