JP3196133B2 - Motorcycle Disc Brake Device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk brake device for a motorcycle, and more particularly to a structure for preventing brake noise.

[0002]

2. Description of the Related Art Conventionally, in a disk brake device, a brake disk resonates during braking in a certain frequency range, and an unpleasant noise called so-called brake squeal sometimes occurs.

[0003] As a disk brake device for a motorcycle having a structure for preventing the brake squeal, for example, Japanese Patent Application No. Hei.
80673. This conventional disk brake device is configured by attaching a rubber ring extending along the circumferential direction of the brake disk to a wire spoke type wheel on which the brake disk is mounted. The rubber ring is compressed between a wire spoke extending radially outward from a flange portion of the hub of the wheel and a brake disc positioned laterally to the vehicle width direction from the wire spoke and fixed to the flange portion. It was interposed in state.

[0004] With this configuration, the vibration of the brake disk generated at the time of braking can be attenuated by the rubber ring, and the noise of the brake can be suppressed.

[0005]

However, when the rubber ring is interposed between the brake disc and the wire spokes as described above, the rubber ring is exposed on the back side (the center side in the vehicle width direction) of the brake disc. However, there is a problem that the pebbles easily collide due to collision of the pebbles or mud or the like. In addition, it can be seen from between the wires, and the appearance is impaired.

[0006] When a wire spoke is pressed into contact with the rubber ring, a thick and highly rigid wire spoke must be used. Furthermore, since the wire spokes are substantially in surface contact with the rubber ring, there are high surface pressure portions where the wire spokes are pressed and low surface pressure portions where the wire spokes do not touch, and corrosion due to the adhesion of the foreign matter occurs. There was also a problem that the durability was reduced. In particular, even if it is not a wire spoke, the shape of the spoke is determined from the design, but if the surface pressure is made uniform to solve the above-mentioned problem,
Spoke shape is restricted. In order to solve such a problem, it is necessary to avoid a decrease in workability when assembling a member for damping the vibration of the brake disk.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and it is an object of the present invention to suppress a decrease in the durability of rubber and to increase a degree of freedom in designing a spoke in suppressing brake noise. Aim. It is another object of the present invention to reduce the appearance of the brake sound from being impaired.

[0008]

According to the present invention, there is provided a motorcycle disk brake device in which an annular disk-shaped brake disk is mounted on a flange of a hub by mounting bolts penetrating an inner peripheral portion of the disk. A disc brake device for a motorcycle in which an annular weight is elastically supported via rubber concentrically with a brake disc, wherein the weight is formed so that an inner diameter is larger than an outer diameter of the flange. A rubber-like support plate having an outer diameter substantially equal to the outer diameter of the brake disc and an inner diameter substantially equal to the inner diameter of the brake disc is in close contact with rubber, and the rubber is adhered to the entire side surface of the weight, The support plate is bonded to the side surface of the support plate so as to be biased toward the outer peripheral portion, a hole through which the mounting bolt penetrates is formed in the inner peripheral portion of the support plate, and the weight has The brake disk is positioned at the center of the hub in the axial direction outside the brake disk, the inner peripheral portion of the support plate is sandwiched between the flange and the inner peripheral portion of the brake disk, and the brake disk and the support plate are fastened together to the hub by the mounting bolts. It is.

According to a second aspect of the present invention, there is provided a motorcycle disk brake device, wherein an annular disk-shaped brake disk is mounted on a flange of a hub with mounting bolts penetrating an inner peripheral portion of the disk. A motorcycle disc brake device in which an annular weight is elastically supported via rubber concentrically with a brake disc via rubber, wherein the weight is formed such that an outer diameter is smaller than an inner diameter of the brake disc, and An outer peripheral portion having an inner diameter substantially equal to the inner diameter is brought into close contact with a ring-shaped support plate extending radially outward to near the mounting bolt via rubber, and the rubber is
Attaching the entire surface to the side surface of the weight, and bonding to the side surface of the support plate so as to be biased toward the inner peripheral side, forming a hole through which the mounting bolt passes through the outer peripheral portion of the support plate, and braking the weight Positioned so as to face the space opened to the end of the flange radially inward from the disc, overlapping the outer surface of the inner periphery of the brake disc with the support plate outside,
The brake disc and the support plate are fastened together to the hub by the mounting bolts.

According to the present invention, since the vibration of the brake disk generated at the time of braking is transmitted to the weight via the rubber, the vibration energy on the brake disk side is reduced by the amount of the vibration of the weight, and the brake squeal is suppressed. Also, the spokes do not come into contact with any components for preventing brake squeal.

[0010] In the first aspect of the invention, the rubber is disposed inside the brake disk in the axial direction to protect the rubber, and in the second aspect of the invention,
The rubber is disposed inside the support plate in the axial direction and protected. Further, both the support plate and the brake disc can be mounted on the hub with mounting bolts.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a side view showing a state in which a brake disk is mounted on a hub in a disk brake device according to the present invention, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. is there.

In these figures, 1 is a hub for a front wheel of a motorcycle, and 2 is a brake disc for a disc brake device. The hub 1 is used for a wire spoke type wheel. Flanges 3 and 4 are integrally formed at both left and right ends, and a large number of wire spokes 5 are locked to both flanges 3 and 4. Reference numeral 6 denotes a bearing for rotatably supporting a front wheel shaft (not shown), and reference numeral 7 denotes a collar between the bearings.

The brake disc 2 is formed in an annular plate shape, and is screwed to the flange 4 of the hub 1 with an attachment bolt 8 penetrating an inner peripheral portion thereof. That is, in this embodiment, the portion of the flange 4 where the mounting bolt 8 is screwed is the brake disk mounting portion. This brake disc mounting portion is indicated by reference numeral 9 in FIGS. 2a is a hole for reducing the weight formed in the brake disk 2 and 2b is a circular hole for heat radiation formed on the friction surface of the brake disk 2.

Reference numeral 11 denotes an annular weight according to the present invention.
The inner diameter of the weight 11 is set to be larger than the outer diameter of the flange 4 of the hub 1 and is in close contact with a support plate 12 formed in the shape of an annular plate via rubber 13. The rubber 13 is adhered to one side surface of the weight 11 over the entire surface, and is also adhered to the outer peripheral portion of the support plate 12 over the entire periphery. The thickness of the rubber 13 is set slightly smaller than the weight 11 and is set to a size that allows the weight 11 to vibrate by its own elasticity.

As shown in FIG. 3, the support plate 12 is formed so that the inner diameter is substantially equal to the brake disk 2 and the outer diameter is substantially equal to the outer diameter of the weight 11. The inner peripheral portion is held between the flange 4 and the brake disk 2 with the weight 11 positioned radially outward of the flange 4 and with the rubber-bonded portion on the outer peripheral surface being in contact with the side surface of the brake disk 2.
A hole through which the mounting bolt 8 penetrates is formed in the inner peripheral portion.

The weight 11 is positioned at a position concentric with the hub 1 and the brake disk 2 with the support plate 12 fixed to the hub 1 as described above, that is, at the radially outer side of the flange 4. It is located on the axial center side of the hub 1 with respect to the disk 2. That is, the weight 11
As shown in FIG. 3, the inner peripheral surface is opposed to the outer peripheral surface of the flange 4 with a substantially uniform gap G over the entire circumference. In addition, the thickness of the weight 11 is set to a dimension such that the weight 11 does not touch the wire spoke 5 located on the axially central side of the weight 11 in a state where the weight 11 is assembled to the hub 1.

That is, the weight 11 is elastically supported concentrically with the hub 1 and the brake disk 2 via the support plate 12 and the rubber 13 near the brake disk mounting portion 9. As a result, a dynamic damper 14 including the weight 11, the rubber 13, and the support plate 12 is formed.

When the dynamic damper 14 is provided in this manner, if the brake disk 2 vibrates during braking, the vibration is transmitted from the brake disk 2 to the weight 11 via the support plate 12 and the rubber 13. Then, the vibration energy on the brake disk 2 side is reduced by the amount of the vibration of the weight 11, and the brake squeal is suppressed.

Therefore, the brake disc 2 and the hub 1
This can prevent the generation of a brake noise due to the resonance of. Since both sides of the rubber 13 in the axial direction of the hub 1 are covered by the weight 11 and the brake disc 2, the weight 11 and the brake disc 2 substantially serve as rubber protection members, and stones, mud, etc. collide with or adhere to the rubber 13. Less to do.

Further, since the rubber 13 can be used in a state where there is no member pressed against the rubber 13, the rubber 13 is protected by the weight 11 and the brake disk 2 as described above, and the durability of the rubber 13 is improved. The nature becomes high.

Furthermore, even if the weight 11 and the rubber 13 are positioned radially outside the flange 4, since they are disposed axially centrally with respect to the brake disc 2, they are difficult to see from the outside of the wheel. That is, the appearance is rarely impaired. In addition, since the wire spokes 5 do not come into contact with any components for preventing brake squeal, the shape of the spokes is not restricted.

Further, since both the support plate 12 and the brake disk 2 can be mounted on the hub 1 with the mounting bolts 8, the support plate 12 and the brake disk 2 are fixed to the hub 1 by individual mounting bolts. hand,
The number of mounting bolts can be reduced, and not only the number of mounting bolts but also the number of jigs and tools used for the mounting operation and the number of man-hours can be reduced. In addition, weight 11
Are arranged in an open space (dead space) outside of the flange 4 in the radial direction, so that the conventional wheel structure is not restricted at all.

In the above-described embodiment, an example is shown in which the weight 11 is disposed radially outward of the flange 4 and centrally in the axial direction with respect to the brake disc 2. However, as shown in FIGS. The rubber may be disposed radially inward of the brake disc. FIG. 4 is a side view showing another embodiment in which the weight is disposed radially inward of the brake disc and the support plate is fixed to the brake disc mounting portion, and FIG. 5 is a sectional view taken along line VV in FIG. In these drawings, the same or equivalent members as those described in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description is omitted.

The support plate 12 shown in FIGS. 4 and 5 is formed so as to cover substantially the entire side surface of the flange 4.
A portion of the outer peripheral portion is partially radially outwardly extended only in a portion corresponding to the mounting bolt 8, and the extended portion 24 is fixed to the flange 4 together with the brake disc 2 by the fixing bolt 8. . In this embodiment, the support plate 12 is positioned outside the brake disc 2 in the axial direction.

The support plate 12 used in this embodiment has a portion facing the flange 4 partially bulging away from the flange 4, and a rubber portion of the bulging portion 25 facing the flange 4 is provided. The weight 11 is in close contact with 13. As shown in FIG. 5, the weight 11 is located at a position just inside the brake disk 2 in the radial direction. For this reason, the weight 11 is covered with the support plate 12 and the rubber 13 from the outer peripheral side and the inner peripheral side. At the same time, the portion of the rubber 13 facing the outside of the wheel is also covered by the support plate 12.

4 and 5, when the brake disc 2 vibrates during braking, the vibration is transmitted from the brake disc 2 to the weight 11 via the support plate 12 and the rubber 13. Become. Then, in the same manner as in each of the above-described embodiments, the vibration energy on the brake disk 2 side is reduced by the amount of vibrating the weight 11, and the brake squeal is suppressed.

Even with this construction, the rubber 13 is covered on both sides in the axial direction by the flange 4, the rubber 13 and the support plate 12, and the wire spokes 5 are not touched by any components for preventing brake noise. Nothing. For this reason, stones, mud, and the like are less likely to collide with or adhere to the rubber 13 and the rubber 13 can be used without a member that presses the rubber 13 against the rubber 13, thereby increasing the durability of the rubber 13.

Further, since the rubber 13 is positioned inside the bulging portion 25 of the support plate 12 and the portion of the rubber 13 facing the outside of the wheel is covered with the support plate 12, stones, Mud and the like are less likely to collide or adhere. Furthermore, in addition to the fact that both sides of the rubber 13 in the axial direction are covered with the weight 11 and the flange 4 and the support plate 12, the support plate 4 entirely covers the side of the flange 4, so that The external appearance is simplified, and the external appearance is not impaired.

In addition, since both the support plate 12 and the brake disk 2 can be mounted on the hub 1 with the mounting bolts 8, the support plate 12 and the brake disk 2 are fixed to the hub 1 by individual mounting bolts. In comparison, the number of mounting bolts can be reduced, and not only the number of mounting bolts, but also the number of jigs and tools used for mounting work and the number of working steps can be reduced. In addition, the weight 11 is disposed so as to face the space opened at the end of the flange 4 and is arranged in an open space (dead space), so that the conventional wheel structure is not restricted at all. Nor.

In this embodiment, an example is shown in which the present invention is applied to a wheel used as a front wheel of a motorcycle.
Needless to say, it can be applied to the rear wheel of a motorcycle.

[0031]

As described above, according to the present invention, since the vibration of the brake disk generated during braking is transmitted to the weight via the rubber, the vibration energy on the brake disk side is reduced by the amount of the vibration of the weight. Brake squeal is suppressed. For this reason, it is possible to prevent a brake sound from being generated due to resonance between the brake disk and the hub. Further, since the spokes do not come into contact with any components for preventing brake squeal, a wire-type spoke can be used, and the shape of the spoke is not restricted.

Further, since both the support plate and the brake disk can be mounted on the hub with the mounting bolts, the number of mounting bolts is smaller than the structure in which the support plate and the brake disk are fixed to the hub by individual mounting bolts. It is possible to reduce the number of mounting bolts, as well as the number of jigs and tools used for the mounting operation and the number of operation steps. Therefore, assembly work and maintenance can be easily performed.

Furthermore, in the first aspect of the invention, the rubber is disposed inside the brake disk in the axial direction to protect the rubber, and in the second aspect of the invention, the rubber is disposed in the axial direction from the support plate. Since the rubber is provided inside and protected, the durability of the rubber is increased and the appearance of the rubber can be prevented from being impaired. In addition, in the invention described in claim 1, the weight is disposed radially outside the flange, and in the invention described in claim 2, the weight faces the space opened at the end of the flange. Since they are arranged and arranged in an open space (dead space), the conventional wheel structure is not restricted at all.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a brake disc in a disc brake device according to the present invention is mounted on a hub.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged sectional view showing a main part.

FIG. 4 is a side view showing another embodiment in which a weight is disposed radially inward of a brake disc and a support plate is fixed to a brake disc mounting portion.

FIG. 5 is a sectional view taken along line VV in FIG.

[Explanation of symbols]

1 ... hub, 2 ... brake disc, 4 ... flange, 5 ...
Wire spokes, 9… Brake disc mounting part, 11
... weight, 12 ... support plate, 13 ... rubber, 14 ... dynamic damper.

Claims (2)

(57) [Claims] An annular plate-shaped brake disk is connected to a hub flange.
With a mounting bolt that penetrates the inner circumference of the disc into the lunge
A motorcycle in which an annular weight is elastically supported via rubber concentrically with the brake disc near this mounting part
The disc brake device according to claim 1, wherein the weight has an inner diameter.
Formed to be larger than the outer diameter of the flange,
It has an outer diameter approximately equal to the outer diameter of the weight and
An annular support plate having an inner diameter approximately equal to the inner diameter of the disk
To the side of the weight.
Glue over the surface and
Adhesively bias to the peripheral side, and attach
Drill a hole through which a bolt is attached, and attach the weight to the flange.
Radially outward, axially center of hub from brake disc
Position the inner periphery of the support plate with the flange and brake
It is clamped by the inner periphery of the disc, and
That the brake disc and support plate were fastened together to the hub
A disc brake device for a motorcycle, characterized in that: 2. An annular disk-shaped brake disk is connected to a hub flange.
With a mounting bolt that penetrates the inner circumference of the disc into the lunge
Attach an annular weight near this attachment part to the brake
Motorcycle elastically supported via rubber concentrically with the disc
The disc brake device according to claim 1, wherein the weight has an outer diameter of
Formed to be smaller than the inner diameter of the brake disc,
The weight has an inner diameter substantially equal to the inner diameter of the weight, and the outer peripheral portion is attached to the mounting portion.
Toroidal support extending radially outward to near the bolt
The rubber is adhered to the plate via rubber, and the rubber is attached to the side of the weight.
Adhere over the entire surface and on the side of the support plate
Adhesively biased to the inner peripheral side, the outer peripheral part of this support plate
Drill a hole through which the mounting bolt passes, and brake the weight
Empty at the end of the flange radially inside the disc
With the support plate on the outside.
Lay it on the outer surface of the inner circumference of the rake disc and
The brake disc and support plate to the hub together.
Disc brake device for a motorcycle .