JP2640383B2 - Multi disc brakes for vehicles - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple disc brake for a vehicle having a fixed disc and a movable disc.

[Conventional technology]

Multi-disc disc brakes for vehicles are, for example,
As shown in 308 publication and JP 57-12133 A,
An annular cylinder integrally having a fixed disk is screwed to a hub or axle, and splines (or serrations) are formed between the outer peripheral surface of the annular cylinder sandwiched between the fixed disk and the spokes of the wheel and the inner peripheral surface of the movable disk. A sliding mechanism comprising meshing is provided.The sliding mechanism enables the movable disk to slide in the axial direction of the axle, and the friction pads provided on both side surfaces of the fixed disk and the movable disk are pressed by the pistons of the caliper, and the movable disk is moved. The disc is slid toward the fixed disc to perform the braking action.

[Problems to be solved by the invention]

In such a configuration, since the movable disk slides on the outer peripheral side of the annular cylinder, there is a disadvantage that the peripheral speed when rotating the slide mechanism is large, and the slide resistance of the movable disk is increased.

In this type of multi-disc disc brake, it is desirable to concentrate the braking torque as much as possible on the center line in the width direction of the wheel. However, in the above-described structure, the movable disc during braking slides on an annular cylinder near the wheel spokes. In addition, since the sliding position of the movable disk is also different due to wear of the friction pad due to repeated braking, the point of application of the braking torque of the movable disk fluctuates, and it is difficult to concentrate both braking torques on the center line in the width direction of the wheel. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a multi-disc disk brake for a vehicle in which the peripheral speed of a slide mechanism of a movable disk is reduced to reduce slide resistance, and braking torque is concentrated on the center line in the width direction of the wheel. I have.

[Means for solving the problem]

In order to achieve the above object, a multi-disk disc brake for a vehicle comprising a fixed disc fixed to a hub rotatably supported on the outer periphery of an axle and a movable disc slidably provided in the hub in an axial direction. In the first invention,
On the hub, a fixed disk mounting cylinder surrounding the hub concentrically is protruded, and the fixed disk is fixedly mounted on the outer peripheral portion of the fixed disk mounting cylinder, and the fixed disk is positioned on the center line in the width direction of the wheel. In addition, a spline is formed in the longitudinal direction of the inner peripheral surface of the fixed disk mounting cylinder, and a spline is formed in the longitudinal direction of the outer peripheral surface of the movable disk support cylinder to which the movable disk is fixed, and the movable disk support cylinder is fixed to the fixed disk mounting cylinder. A sprocket of the disk mounting cylinder is meshed with each other to form a sliding mechanism for the movable disc, and a spline of the sliding mechanism is arranged so as to always mesh with the center line in the width direction of the wheel. In the present invention, a fixed disk mounting cylinder that concentrically surrounds the hub is protruded from the hub, and the fixed disk is fixed to the fixed disk mounting cylinder. A disk is arranged on the center line in the width direction of the wheel, a spline is formed in a longitudinal direction of an outer peripheral surface of the hub, and a spline is formed in a longitudinal direction of an inner peripheral surface of a movable disk support cylinder on which the movable disk is fixed. A movable disk support cylinder and a spline of the hub are meshed with each other to constitute a movable disk slide mechanism,
The spline of the slide mechanism is arranged so as to always mesh with the center line in the width direction of the wheel.

(Operation)

According to the first and second aspects of the present invention, since the slide mechanism for the movable disk is provided on the inner peripheral side of the fixed disk mounting cylinder and the outer circumference of the hub inside the fixed disk mounting portion,
The peripheral speed of the slide mechanism becomes smaller than before, and the slide resistance is reduced. In addition, since the braking torque of the fixed disk and the braking torque of the movable disk concentrate on the center line in the width direction of the wheel, the bending moment acting on the movable disk is reduced, and the deflection of the movable disk is suppressed. Squeal and judder decrease.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, in which a wheel 2 cantilevered by a swing arm 1 of a motorcycle is on a side opposite to a swing arm of a hub 4 rotatably supported on the outer periphery of the wheel 3. The rim 7 of the tire 6 is connected to the spoke 5 extending from the rim 7.

A fixed disk 8 and a movable disk 9 slidable in the axial direction of the hub 4 are disposed between the spokes 5 and the swing arm 1.
The multi-disc brake 11 is composed of a caliper 10 of a piston-facing type which presses the disks 8 and 9.

A fixed disk mounting cylinder 12 having an outer peripheral step is provided on the flange of the hub 4 so as to concentrically surround the hub 4 with bolts 13. A fixed disk 8 is fixed on the center line CL in the width direction of the wheel 2 with bolts 14. Fixed disk mounting tube 12
A spline (or serration) 15 is formed in the longitudinal direction of the inner peripheral surface of the wheel 2 so as to cross the center line CL in the width direction of the wheel 2. A spline (or serration) 17 formed in the longitudinal direction of the outer peripheral surface of the movable disk support cylinder 16 is meshed with the spline 15, and the movable disk supporting mechanism is constituted by the two splines 15 and 17. Cylinder 16
The movable disk 9, which is fixed by bolts 18, is slidably supported in the axial direction of the hub 4.

The splines 15 and 17 of the slide mechanism 30 are arranged so as to always intersect with and intersect with the center line CL in the width direction of the wheel 2 regardless of the sliding of the movable disk 9, and are supported by the fixed disk mounting cylinder 12. The control torque of the fixed disk 8 and the movable disk 9 supported by the movable disk support cylinder 16 is concentrated on the center line CL.

A seal 19 is provided on the outer peripheral surface of the hub 4 on the side of the swing arm 1 to contact the inner peripheral surface of the movable disk support cylinder 16.
A seal plate provided on the movable disk 9 is also provided on the outer peripheral surface of the fixed disk mounting cylinder 12 on the swing arm 1 side.
20 is provided with a seal 21 which abuts on both seals 19, 2
1 prevents dust, earth and sand, water and the like from entering the slide mechanism 30.

A cappar 10 for pressing the fixed disk 8 and the movable disk 9 is provided with a piston on the spoke 5 side of the fixed disk 8.
A caliper half 23 having a piston 22 on the swing arm 1 side of the movable disc 9; a friction pad 26 arranged on the spoke 5 side of the fixed disc 8; A friction pad 27 disposed between the disk 8 and the movable disk 9 and a friction pad 28 disposed on the swing arm 1 side of the movable disk 9 are connected to a hanger pin 29 inserted through both caliper halves 23 and 25. Hanging.

When the friction pads 26, 28 are pushed by the pistons 22, 24 of the caliper 10, the friction pad 26 presses against the spoke 5 side surface of the fixed disk 8, and the friction pad 28 presses against the side of the swing arm 1 of the movable disk 9 to slide the movable disk 9 toward the fixed disk 8. By this sliding, the movable disk 9 slides the spoke side surface to the friction pad 27 and slides the friction pad 27 to the fixed disk 8 side, and slides the friction pad 27 to the swing arm side surface of the fixed disk 8, and the friction pad 26 At 27 and 28, the fixed disk 8 and the movable disk 9 are pressed to perform a braking action.

In the slide mechanism 30, since the splines 15 and 17 are meshed inside the fixed disc mounting cylinder 12 having a smaller diameter than the fixed disc 8, the peripheral speed of the slide mechanism 30 is suppressed to be smaller than that of the conventional slide mechanism. The sliding resistance of the movable disk 9 is reduced.

The braking torque of the fixed disk 8 acts on the center line CL in the width direction of the wheel 2, and the splines 15, 17 of the slide mechanism 30 keep the center line in the width direction of the wheel 2 constantly regardless of the sliding of the movable disk 9. Since it is arranged to intersect with and mesh with CL, the braking torque of the movable disk 9 also acts on the center line CL in the width direction of the wheel 2.

Therefore, the braking torque of the fixed disk 8 and the movable disk 9 can be concentrated on the center line CL in the width direction of the wheel 2, the bending moment acting on the movable disk 9 can be reduced, and the deflection of the movable disk 9 can be suppressed. Squeal and judder during braking can be reduced.

Further, since the fixed disk 8 is arranged on the spoke 5 side and the movable disk 9 is arranged on the swing arm 1 side opposite to the spoke side, the interval between the fixed disk 8 and the spoke 5 becomes narrower than before, and the multi-disc brake 11 The overall width can be reduced, and steering stability is improved.

FIG. 2 shows a second embodiment of the present invention.
A fixed disk mounting cylinder 40 that concentrically surrounds the hub 40 is provided on the spoke 5 side of the hub 40 rotatably supported on the outer periphery of the hub 40.
The fixed disk 45 is fixed on the widthwise center line CL of the wheel 2 on the side surface of the fixed disk mounting cylinder 40a on the side opposite to the spokes by a bolt.

A spline (or serration) 41 is formed in the longitudinal direction of the outer peripheral surface of the hub 40 so as to cross the center line CL in the width direction of the wheel 2. Further, a spline (or serration) 44 is formed in the longitudinal direction of the inner peripheral surface of the movable disk support cylinder 43 to which the movable disk 42 is fixed, and the two splines 41 and 44 are engaged with each other to form a slide mechanism 48. Splines 41, 44
, Regardless of the sliding of the movable disc 42, is arranged so as to always intersect and mesh with the center line CL in the width direction of the wheel 2.

Seals 46 and 47 are provided on the inner peripheral side of the fixed disk mounting cylinder 40a and the outer peripheral side of the hub 40, and the slide mechanism 48 is attached to the seals 46 and 47.
Sealed at 47.

Also in the present embodiment configured as described above, the first
It has the same operation and effect as the embodiment.

〔The invention's effect〕

As described above, according to the first and second aspects of the present invention, since the slide mechanism of the movable disk is provided on the inner peripheral side of the fixed disk mounting cylinder or the outer periphery of the hub, the fixed disk is fixed. As compared with the conventional slide mechanism in which the movable disk slides on the outer peripheral side of the annular cylinder, the peripheral speed of the slide mechanism is reduced, and the slide resistance of the movable disk can be reduced.

In addition, since the control torque of the fixed disk and the braking torque of the movable disk are concentrated on the center line in the width direction of the wheel, the bending moment acting on the movable disk is reduced, and the deflection of the movable disk can be suppressed. In addition, noise and judder during braking are reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a multiple disc brake according to the present invention, and FIG. 2 is a sectional view showing a second embodiment of the same. 2 ... wheels, 3 ... axle, 4, 40 ... hub, 8, 45 ... fixed disk, 9, 42 ... movable disk, 10 ... caliper, 11
…… Multi disc brake, 12… Fixed disc mounting cylinder, 15… Spline of fixed disc mounting cylinder, 16… Movable disc support cylinder, 17,44 …… Spline of movable disc support cylinder, 26,27,28 …… Friction pad, 30,48 …… Slide mechanism, 41 …… Spline of hub

Claims (2)

(57) [Claims] 1. A multi-disc disc brake for a vehicle, comprising: a fixed disc fixed to a hub rotatably supported on an outer periphery of an axle; and a movable disc slidably provided in an axial direction of the hub. A fixed disk mounting cylinder protruding around the hub concentrically, the fixed disk is fixed to the outer peripheral portion of the fixed disk mounting cylinder, and the fixed disk is arranged on the center line in the width direction of the wheel. At the same time, a spline is formed in the longitudinal direction of the inner peripheral surface of the fixed disk mounting cylinder, and a spline is formed in the longitudinal direction of the outer peripheral surface of the movable disk support cylinder to which the movable disk is fixed. A movable disk slide mechanism is formed by meshing the cylinder splines with each other, and the spline of the slide mechanism always intersects the center line in the width direction of the wheel. Vehicle multi-plate disk brake, characterized in that arranged so as to mesh. 2. A multi-disc disk brake for a vehicle comprising: a fixed disk fixedly mounted on a hub rotatably supported on an outer periphery of an axle; and a movable disk slidably provided in an axial direction of the hub. A protruding fixed disk mounting cylinder surrounding the hub concentrically, fixing the fixed disk to the fixed disk mounting cylinder, disposing the fixed disk on the center line in the width direction of the wheel, A spline is formed in the longitudinal direction of the outer peripheral surface of the hub, and a spline is formed in the longitudinal direction of the inner peripheral surface of the movable disk support cylinder on which the movable disk is fixed, and the splines of the movable disk support cylinder and the hub are engaged with each other. A slide mechanism for the movable disk is formed, and a spline of the slide mechanism is arranged so as to always intersect and mesh with the center line in the width direction of the wheel. The multi-plate disc brake for a vehicle.