JP2801045B2 - Motorcycle Disc Brake Device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a motorcycle provided with a disc brake device.

(Description of the Related Art) A disc brake device provided in a motorcycle moves a piston accommodated in a caliper by hydraulic pressure or the like, so that a brake disc that rotates together with a wheel is sandwiched between pads supported by the piston and a pad and a brake. The brake is applied to the rotation of the wheels by the frictional resistance generated between the disks.

By the way, in a disk brake device having a so-called one-piston type caliper having a piston only on one side, the wear of the pad is dealt with by supporting the caliper so as to be slidable in the axle direction.

(Problems to be Solved by the Invention) However, if the above-mentioned configuration for supporting the caliper so as to be slidable is adopted, it is necessary to keep the caliper and the bracket for supporting the caliper high in rigidity, which increases the weight. There is a problem.

There is also a problem that the structure of the caliper is complicated depending on the positional relationship of the slide portions of the caliper.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a motorcycle capable of reducing the weight and simplifying the structure of a disc brake device.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a disc brake device having a single-piston caliper having a piston on one side only, and a ring-shaped brake disc rotating together with wheels and a chain sprocket. A motorcycle provided with an intermediate collar and an end collar through which an axle is inserted, wherein the intermediate collar rotatably supports a wheel hub, and the end collar is inserted into and fixed to one of the rear arms, and the A sprocket is rotatably supported, a bracket for fixing the caliper is supported, the bracket is engaged with the rear arm, and one side surface of the chain sprocket and a hub end surface of a wheel are connected via a mechanical clutch. Insert the fitting part formed on the brake disc into the E over emissions sprocket fitted to protruding from the guide pin on the other side, characterized in that the slidably floating support in the axle direction along the guide pin.

According to the present invention, the caliper of the disc brake device is fixed, and the brake disc slides, so that the caliper and the bracket supporting the caliper do not require excessive rigidity. Can be achieved.

Also, if the embedded diameter of the guide pin is increased to receive the inner peripheral portion of the ring-shaped brake disk by the pin, the outer diameter of the brake disk can be increased and rattling can be eliminated. Also, the weight of the brake disc can be reduced.

Furthermore, the chain collar and the caliper bracket were supported by the end collar inserted and fixed to one of the rear arms, and the brake disc was slidably supported on the chain sprocket. It can be sub-assembled, which simplifies assembly work. Since the chain sprocket and the hub of the wheel are connected via the mechanical clutch, the wheel can be easily removed while the chain sprocket, the caliper, and the brake disc remain in the end collar, and the removability of the wheel is improved.

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

1 is a sectional view of a rear portion of a rear arm of a motorcycle according to the present invention (a sectional view taken along line II of FIG. 2), FIG. 2 is a side view thereof, and FIG. 3 is a sectional view taken along a line III-III of FIG. Fig. 4
FIG. 4 is an enlarged cross-sectional view taken along line IV-IV of FIG.

In FIGS. 1 and 2, 1-1 and 1-2 denote a pair of left and right rear arms extending parallel to each other in the front-rear direction of the vehicle body, and these rear arms 1-1 and 1-2 are integrated at their front ends. The front end is pivotally attached to a vehicle body frame (rear arm bracket) by a pivot shaft (not shown), and the intermediate portion is suspended on the vehicle body side via a link mechanism and a rear cushion (not shown). I have.

A hollow axle-shaped rear axle 2 is suspended from the left and right rear arms 1-1 and 1-2, and a rear wheel 3 is rotatable via bearings 4 and 4 on the rear axle 2. It is supported by That is, the hub 5 of the rear wheel 3 is provided with a collar 6 which is inserted into the center of the hub, and short hollow end pieces 8 and 9 are fitted to both ends of the collar 6, respectively. The bearings 4, 4 are incorporated on the outer peripheral side of the pieces 8, 9. The collar 6 and the end pieces 8, 9 constitute an intermediate collar.

The collar 6, the end pieces 8, 9 and the ball bearings 4, 4, which constitute the intermediate collar, are integrally incorporated into the hub 5, and the collar 6 and the end pieces 8, 9 are arranged in a straight line. The rear wheel 3 is inserted by inserting the axle 2
Are rotatably supported by the rear axle 2 as described above.

By the way, between one rear arm 1-1 and the rear wheel 3, a disc brake device 10 and a chain sprocket 11
Are arranged with the disc brake device 10 on the outside, and they are supported by an end collar 12 extending inward from the rear arm 1-1. That is, the end collar 12
Is fitted around the outer end of the rear axle 2 on the side of the rear arm 1-1.
One end thereof is fixedly inserted through the rear arm 1-1, and supports the bracket 13 and the chain sprocket 11 of the disc brake device 10.

The chain sprocket 11 is rotatably supported on the end collar 12 via two rows of bearings 15 and 15 incorporated on the outer periphery of the end collar 12. The guide pins 16 of the book are projected. The chain sprocket 11 and the rear wheel 3
Are connected to each other via a mechanical clutch 17.

The mechanical clutch 17 includes a clutch inner 19 connected to an end surface of the hub 5 with a plurality of bolts 18 and a clutch outer 21 connected to an inner end surface of the chain sprocket 11 with a plurality of screws 20. As shown in FIG. 3, the engagement pieces 21a,
21a is engaged with each side of the pentagonal projection 19a. A drive chain 22 is wound between the chain sprocket 11 and a small-diameter chain sprocket provided on the transmission case side (not shown).

On the other hand, the disc brake device 10 is of a so-called one-piston type, and bolts 23, 2 are provided below the bracket 13.
A single piston 25 is fitted on one side of the caliper 24 connected at 3 (see FIG. 2) so as to be slidable in the axle direction (the left-right direction in FIG. 1). The piston 25 is a caliper
Under pressure of thick oil supplied from a port 26 opened to the outer end surface of the cylinder 24, the pad moves to the inside (to the right in FIG. 1), and the pad 28 is attached to a brake disk 27 which rotates together with the hub 5 and the chain sprocket 11. , And the brake is applied to the rotation of the rear wheel 3 by sandwiching the brake disc 27 from both sides with the pad 28 and the pad 29 fixed in the caliper 24.
The bracket 13 has a stepped portion formed on the rear arm 1-1.
Is prevented from rotating by engaging with the lower surface of the.

Incidentally, the brake disc 27 is formed in a ring shape, and the outer diameter thereof is set smaller than that of the chain sprocket 11. (See FIG. 2) are formed in the inner peripheral portion of the brake disc 27. The guide pins which engage with the notch grooves 27a are formed. 16 are floating supported so as to be slidable in the vehicle width direction (left-right direction in FIG. 1).

Here, the coupling structure of the rear axle 2 to the rear arms 1-1 and 1-2 will be described.

On the outer surfaces of the rear ends of the rear arms 1-1, 1-2, concave grooves 28, 28 having a V-shaped cross section extending outward are formed to be long in the vehicle longitudinal direction (the left-right direction in FIG. 2). And the groove 2
Rectangular axle insertion holes 29, 29 which are long in the front-rear direction of the vehicle body are opened at 8,28.

Chain pullers 30, 31 having a rectangular shape in side view are engaged with the concave grooves 28, 28 of the rear arms 1-1, 1-2 so as to be movable in the longitudinal direction of the vehicle body, and are formed on one of the chain pullers 30. One end of the collar 12 is inserted and supported in the circular hole 30a (see FIG. 4) and the axle insertion hole 29 formed on the rear arm 1-1 side. A concave groove 12a (see FIG. 4) is formed over the entire periphery of one end of the collar 12, and the leading end of a stopper bolt 32 screwed to the rear end surface of the chain puller 30 is formed with the concave groove 12a. The end collar 12 is prevented from coming off by engaging with the groove 12a. The position of the stopper bolt 32 is locked by a lock nut 33.

The rear axle 2 is a chain puller from the right in FIG.
31, the end piece 9, the collar 6, the end piece 8, and the collar 12 of the hub 5 are sequentially inserted into the end portion 2a (first portion).
The left end in the figure) contacts the nut 34 fixed and held in the chain puller 30. Thereafter, when the rear axle 2 is gripped with a tool to turn the enlarged diameter portion 2b formed at the other end (the right end in FIG. 1) of the rear axle 2, the leading end 2a is screwed into the nut 34, and the rear axle 2 is screwed. The chain pullers 30, 31, the collar 12, and the hub 5 are fastened in the axial direction without any gap, and both ends thereof are fixed to the rear arms 1-1, 1-2 with the rear wheel 3 rotatably supported.

By the way, the rotational power from the engine (not shown) is input to the chain sprocket 11 via the drive chain 22, and the chain sprocket 11 is freely rotated on the end collar 12. The rotation of the chain sprocket 11 At the same time, the power is transmitted to the brake disk 27 via the guide pins 16 so that the rear wheel 3 and the brake disk 27 are integrally driven to rotate.

Then, the disc brake device 10 is operated by the rider's brake operation, and the rotation of the rear wheel 3 is braked.

That is, when pressurized oil is supplied from the port 26 into the caliper 24, the piston 25 moves inward (to the right in FIG. 1), and the brake disk 27 is moved in the same direction by the pad 28, and To press against the pad 29, the brake disc 27
Is sandwiched from both sides by both pads 28 and 29, and pad 2
The rotation of the rear wheel 3 is braked by the frictional resistance generated on the contact surface between the brake disc 8 and the brake disc 27.

As described above, in the present embodiment, the caliper 24 is connected to the rear arm 1-1 in the one-piston type disc brake device 10.
Side, and the brake disk 27 is slidably floating supported along the guide pins 16 projecting from the chain sprocket 11, so that the caliper 24 and the bracket 13 supporting the caliper 24 do not require excessive rigidity. These parts can be reduced in weight and the structure can be simplified.

Also, the brake disc 27 is formed in a ring shape, and the inner peripheral portion thereof is received by the guide pins 16.
If the embedding diameter (pitch circle diameter) of the guide pins 16 with respect to the chain sprocket 11 and the outer diameter of the brake disc 27 are increased, rattling of the brake disc 27 can be eliminated and the weight of the brake disc 27 can be reduced. Can also be achieved.

Further, the chain sprocket 11 and the bracket 13 of the caliper 24 were supported on the end collar 12 inserted and fixed to one of the rear arms 1-1, and the brake disc 27 was slidably supported on the chain sprocket 11.
The chain sprocket 11, the caliper 24 and the brake disc 27 can be sub-assembled to the end collar 12,
Assembly work is simplified. And the chain sprocket
Since the rear wheel 3 is connected to the hub 5 of the rear wheel 3 via the mechanical clutch 17, the rear wheel 3 can be easily removed while the chain sprocket 11, the caliper 24, and the brake disk 27 remain in the end collar 12. The detachability of the wheel 3 is enhanced.

(Effects of the Invention) As is apparent from the above description, according to the present invention, there is provided a disc brake device having a single-piston caliper having a piston only on one side and a ring-shaped brake disc rotating together with wheels and a chain sprocket. A motorcycle provided with an intermediate collar and an end collar through which an axle is inserted, wherein the intermediate collar rotatably supports a wheel hub, and the end collar is inserted and fixed to one of the rear arms, and the A sprocket is rotatably supported, a bracket for fixing the caliper is supported, the bracket is engaged with the rear arm, and one side surface of the chain sprocket and a hub end surface of a wheel are connected via a mechanical clutch. Insert the brake disc into the chain The sprocket is fitted to a guide pin protruding from the other side of the sprocket and is floatingly supported in the axle direction along the guide pin so that the disc brake device can be reduced in weight and its structure can be simplified. The effect is obtained that the workability and the detachability of the wheels can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rear portion of a rear arm of a motorcycle according to the present invention (a sectional view taken along line II of FIG. 2), FIG.
3 is a sectional view taken along the line III-III of FIG. 1, and FIG. 4 is a sectional view of FIG.
It is an IV-IV line expanded sectional view. 1-1, 1-2 ... rear arm, 2 ... rear axle (axle),
3 ... rear wheel (wheel), 5 ... hub, 6 ... color (intermediate color), 8, 9 ... end piece (intermediate color), 10 ...
… Disc brake device, 11… Chain sprocket, 12… End collar, 13… Bracket, 16… Guide pin, 17… Mechanical clutch, 24… Caliper,
25 ... piston, 27 ... brake disc.

Claims (1)

(57) [Claims] 1. A motorcycle comprising a single-piston caliper having a piston on one side only, and a disc brake device having a ring-shaped brake disc which rotates together with wheels and a chain sprocket. A bracket for rotatably supporting a wheel hub on the intermediate collar, inserting the end collar through one of the rear arms and fixing the chain sprocket to the rotatable support, and fixing the caliper. Let me support
The bracket is engaged with the rear arm, one side of the chain sprocket is connected to a hub end surface of a wheel via a mechanical clutch, and the brake disk is connected to a fitting portion formed on the other side of the chain sprocket. The motorcycle is characterized in that it is fitted to a guide pin protruding from the vehicle and is floatingly supported slidably in the axle direction along the guide pin.