JPS63140130A - Brake disk - Google Patents

Abstract

PURPOSE:To reduce the weight of a brake disk and to improve a radiating effect by clamping a fin intermediate between two disks to be united in a body by joining and forming the disks of clad steel plate. CONSTITUTION:A disk 1, a disk 2 and a fin 3 are joined together to form a brake disk. A large axle hole is formed at the center of the disk 1, and the bolt holes for fixing the brake disks to the axle are bored in the periphery of the disks. The fin 3 is adapted to let air pass between both disks 1, 2 to radiate frictional heat generated during braking. Stainless material which does not gather rust is used for the outer surfaces 9, 10 of the disks 1, 2 and the clad steel material made of light aluminum material is used for the inside of the disk, so that the brake disks can be reduced in weight as a whole.

Description

[Detailed description of the invention] (Ilr, what is used by writers?) The present invention relates to a brake plate.

(Prior Art) A brake device is a necessary part of all vehicles, whether four-wheeled or two-wheeled, and plays a large role in the functionality of the vehicle. By the way, the functions required of such a brake device are, firstly, constant braking force during braking;
That is, it is necessary to obtain frictional force, and for this purpose, the generated frictional heat must be quickly dissipated. Cast iron is generally used for the brake plates of brake devices in four-wheeled vehicles, while stainless steel is used in two-wheeled vehicles; however, when comparing the two materials, there are
The cast iron brake plates used on four-wheeled vehicles are superior and can be produced at a lower cost. However, brake plates made of aluminum rust quickly, so it is fine if the brake device is installed in a place that cannot be seen from the outside, such as in a four-wheeled vehicle, but in the case of a two-wheeled 11-ho, the brake plate is Since the brake plates are exposed on the surface, the appearance of the brake plates is unfavorable.Therefore, as mentioned above, stainless steel brake plates are used in motorcycles because they are expensive, have low thermal conductivity, and have poor heat dissipation performance. .

On the other hand, another requirement for brake devices is weight reduction. This weight reduction is a requirement not only for the brake equipment but also for all parts of four-wheeled vehicles and two-wheeled vehicles, but in particular, since the brake plate rotates with the wheel,
The kinetic energy required during acceleration becomes large. In other words, for structural parts that do not rotate, energy is consumed only in translational motion, but for rotating brake plates, energy is consumed in translational motion and rotational motion around the center of gravity. Reducing the weight of the board is extremely important. In particular, the completion moment, which greatly affects the energy consumption when rotating a brake plate, is influenced by the mass of the brake plate. Therefore, in order to reduce the weight of conventional brake plates, some use a clad steel plate with an aluminum plate as the intermediate layer and stainless steel plates bonded on both sides, but since the jγ friction heat during braking is not sufficiently dissipated, the 3+1 A situation occurs in which a separation phenomenon occurs.

(Objective of the present invention) As described above, the brake plate of a brake device is required to have characteristics for dissipating frictional heat and to be lightweight. As a result, the materials that can be used are limited, and there is a problem in that it is not possible to satisfy the conditions necessary for a brake plate.

The present invention is a technology developed to solve this problem, and provides a brake plate that is lightweight and has a high heat dissipation effect without impairing its appearance.

(Structure of the present invention) The brake plate according to the present invention is configured with the following features in order to solve the above problems, that is, to achieve weight reduction and heat dissipation. That is, the brake plate consists of two discs and one fin.

The fins are sandwiched between the two disks and joined and integrated with each other. The disk is made of a clad steel plate, and the fins are made of a light alloy such as aluminum. One of the two discs mentioned above is directly fixed to the wheel, so the bolts are tightened around the hole, and it is a disc-shaped disc with an axle hole in the center, but the other disc has a disc pad. It is ring-shaped with the same width. The fin has a cross section with air holes formed therein, and also has a ring shape, and is sandwiched between the two disks. Here, the shape of the fin cross section is not particularly limited, and it is sufficient that the air hole has a shape that allows air to easily circulate when the brake plate rotates. Therefore, the air hole penetrates from the inner circumference to the outer circumference of the ring-shaped fin. These holes or grooves are formed in a spiral shape, or a shape similar to this, rather than a radial shape, so that air can easily enter through rotation.

Hereinafter, embodiments of the brake plate according to the present invention will be described in detail based on the drawings.

(Embodiment) FIGS. 1 and 2 show embodiments of the brake plate according to the present invention, where 1 indicates an A disk, 2 indicates a B disk, and 3 indicates a fin, and these A disks 1. B disk 2
, and the fins 3 are joined to constitute the brake plate. The A disc l has a large axle hole 4 in the center,
Bolt holes 5.5 for fixing the brake plate to an axle (not shown) are bored around the circumference with seats of a certain depth. Furthermore, cavities 6, 6, . . . are provided between adjacent bolt holes 5.5, thereby reducing the weight of the A-disk I. By the way, the A-disk 1 is made of clad steel.

It is a clad steel plate in which a stainless steel plate 8 is bonded to the outer surface 7 side on which the disc pad comes into contact, and an aluminum plate 9 is bonded to the inner side. As a brake plate for a motorcycle, it is necessary to attach a stainless steel plate to the outer surface 7 to prevent rust, but the inner surface is not necessarily limited to an aluminum plate 9.

On the other hand, the material of the B disk 2 is the same as that of the A disk 1, and the device 10 is made of a clad steel plate.The device 10 is made of a clad steel plate with a stainless steel plate 11 and an aluminum plate 12 bonded inside, and the width is the same as the A disk 1. It is narrower than , and is ring-shaped, just enough for a disc pad to hit. and,
2. Sandwiched and joined between the A disk 1 and the B disk 2 is a fin 3 made of an aluminum plate, and the fin 3 also has a shape with a width equivalent to that of the B disk 2. It is ring-shaped. However, fin 3 has both A@B
Air holes 13 are formed to pass air between the discs 1 and 2 and to radiate frictional heat generated during braking. Furthermore, the air hole 13 must be designed to allow air to pass through it when the brake plate rotates, and is therefore formed in a helical shape. Of course, it is not limited to a spiral shape, but
The direction of the air hole 13 should not be perpendicular to the outer circumference 14 of the fin 3, but should be formed at some inclination, and the hole should penetrate from the outer circumference 14 to the inner circumference 15. here,
FIG. 3 shows an example of the air holes 13,
This figure shows an enlarged cross-sectional view taken along the line A-A in FIG.

The air holes 13 shown in FIG. 3 are a kind of groove formed on both sides of the fin 3, but the desired air holes 13 can be obtained by sandwiching and joining the A disk 1 and the B disk 2. . Of course, forming the grooves on both sides of the fins 3 made of an aluminum plate can be easily done by press working, but it is also possible to form the air holes 13 in other suitable shapes! ). Incidentally, these A disc 1, B disc 2, and fin 3 are joined to each other to form a brake plate, and the joining means may be brazing using an aluminum plating sheet, or adhesive may be used. .

As described above, the brake plate according to the present invention includes an A disc 1 made of a clad steel plate and fixed to an axle, a ring-shaped B disc 2, and an air hole 13 made of an aluminum plate.
The fins 3 formed with the fins 3 are sandwiched and joined together,
You can get the following effects.

(Effects) (1) The brake plate of the present invention is made of a clad steel plate.
It consists of a disc and a B disc sandwiching a fin with an air hole in the middle. When the brake plate rotates, cold air passes through the spiral air hole, so the brake plate The heat dissipation effect is excellent, and the fins are made of aluminum, which has high thermal conductivity, making them even more effective.The frictional force generated between the fins and the disc pads is always constant, resulting in stable braking. It can have an effect.

(2) Also, by combining aluminum fins, the heat dissipation effect can be enhanced, so both disks A and B can be kept below a certain temperature, and even if a clad steel plate is used for the disk, the clad steel plate will The phenomenon of peeling due to frictional heat does not occur.Therefore, the outer surface is made of rust-free stainless steel material, and the inner surface is made of lightweight clad steel material such as aluminum, so the brake plate as a whole is extremely durable. It is lightened by.

(3) Since the aluminum plate is connected as uneven grooves,
Since it has a rib effect and forms a spiral J+1'J in one circumferential direction, even if the outer circumferential surface of the A disk or B disk comes into contact with the disk pad, despite the space created by the groove, the A It does not distort the surface of the disc or B disc.

[Brief explanation of the drawing]

1 and 2 show examples of the brake plate according to the present invention, in which FIG. 1 shows a front view, FIG. 2 shows a sectional view, and FIG. 3 shows an A-- Each shows an enlarged view of the A section.

Claims (2)

[Claims] (1) In the brake plate that brakes the drive wheel by making frictional contact with the disc pad, an A disc that is directly fixed to the wheel and a ring-shaped B disc are made of aluminum and sandwich fins with air holes between them. Both discs A and B are made of a glazed steel plate with a stainless steel plate on the outer surface that contacts the disc pad, and the air holes are passed through from the outer periphery of the fin to the inner periphery of the fin, forming a spiral or helical shape. A brake plate characterized by being formed in a direction similar to that of the brake plate. (2) The brake plate according to claim 1, wherein the air holes are formed by grooves formed on both sides of the fin.