JP2021167635A - Ventilated type brake disk - Google Patents

Abstract

To provide a ventilated type brake disk that can restrain thermal strain from occurring when heat is transferred to support parts via disks.SOLUTION: A ventilated type brake disk comprises two disks 1 each consisting of an annular member of which a center is opened, and facing each other, and a body 2 comprising a central part 3 attachable to an axle of a vehicle, and a plurality of support part 4 radially extended toward a radial direction from the central part 3, and supporting the two disks 1 while separating them by a predetermined dimension. The central part 3 and the plurality of support parts 4 are formed separately from each other, and the support parts 4 are fitted into attachment opening parts 3c formed in the central part 3 respectively.SELECTED DRAWING: Figure 1

Description

The present invention relates to a ventilated brake disc having two discs supported by a support portion.

As a braking means arranged in a vehicle such as a passenger car or a two-wheeled vehicle, for example, as disclosed in Patent Document 1, a plurality of fins (support portions) are radially interposed between two discs facing each other. Examples include configured ventilated brake discs. A ventilated brake disc is attached to the vehicle so that it can rotate integrally with the wheel, and a braking force is obtained by pressing the brake pad against the disc.

Japanese Unexamined Patent Publication No. 8-164828

However, in the above-mentioned ventilated brake discs, when the two discs generate heat due to the brake pads being pressed during braking of the vehicle, the heat is transferred to the respective fins (support portions), respectively. May expand or contract in the extension direction, causing thermal strain. If thermal strain occurs in each support portion in this way, there is a risk that the braking performance will be adversely affected.

The present invention has been made in view of such circumstances, and provides a ventilated brake disc capable of suppressing thermal strain when heat is transferred to a support portion via a disc. There is.

The invention according to claim 1 comprises an annular member having an open center, two discs facing each other, a central portion that can be attached to the axle of a vehicle, and a plurality of discs radiating in the radial direction from the central portion. In a ventilated brake disc provided with a main body having a support portion that is extended and supports the two discs while being separated by a predetermined dimension, the central portion and the plurality of support portions are separated from each other. At the same time, the support portion is fitted into the mounting opening formed in the central portion.

The invention according to claim 2 is the ventilated brake disc according to claim 1, wherein the support portion is made of a pipe-shaped member.

The invention according to claim 3 is the ventilated brake disc according to claim 1 or 2, wherein the support portion is made of a member having a rectangular cross section, and the disc is joined to the front and back surfaces of the ventilated brake disc while being in contact with each other. It is characterized by being made up of.

The invention according to claim 4 is the ventilated brake disc according to claim 1 or 2, wherein the support portion is bent in an arc shape toward the circumferential direction of the central portion. ..

According to the invention of claim 1, since the central portion and the plurality of support portions are separated from each other and the support portions are fitted to the mounting openings formed in the central portion, the support portion is fitted to the central portion. It is possible to allow displacement of the support portion in the extending direction, and it is possible to suppress the occurrence of thermal strain when heat is transferred to the support portion via the disk.

According to the invention of claim 2, since the support portion is composed of a pipe-shaped member, when the ventilated brake disc rotates with the wheels of the vehicle, the inside of the support portion is added to the space between the adjacent support portions. The space functions as an air flow passage, and the air can be effectively circulated outward, and the heat dissipation effect can be further enhanced.

According to the invention of claim 3, the support portion is made of a member having a rectangular cross section, and the discs are joined to the front and back surfaces of the support portion while being in contact with each other. The discs can be joined in contact with each other, and the disc can be stably and reliably joined to the support portion.

According to the invention of claim 4, since the support portion is formed by bending in an arc shape toward the circumferential direction of the central portion, the support portion bent in an arc shape when the ventilated brake disc rotates with the wheels of the vehicle. The air can be effectively circulated outward through the air flow path formed in the above, and the heat dissipation effect can be further enhanced.

A perspective view showing a ventilated brake disc according to an embodiment of the present invention. Front view showing the ventilated brake disc Side view showing the ventilated brake disc Perspective view showing the disc of the ventilated type brake disc Perspective view showing the main body of the ventilated brake disc Front view showing the main body of the ventilated brake disc Side view showing the main body of the ventilated brake disc Perspective view showing the support part of the ventilated type brake disc A perspective view showing a state in which the support portion is fitted into the mounting opening of the main body. Front view showing a state in which the support portion is fitted into the mounting opening of the main body. Side view showing a state in which the support portion is fitted into the mounting opening of the main body. Cross-sectional view showing a state in which the support portion is fitted into the mounting opening of the main body. Front view showing a ventilated brake disc according to another embodiment of the present invention. Perspective view showing the support part of the ventilated type brake disc A perspective view showing a ventilated brake disc according to still another embodiment of the present invention. Perspective view showing the main body of the ventilated brake disc Cross-sectional view showing a state in which the support portion is fitted into the mounting opening of the main body.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The ventilated brake disc according to the present embodiment is attached to the axle of a vehicle such as an automobile or a two-wheeled vehicle so that it can rotate integrally with the axle, and the braking force of the vehicle is obtained by pressing the brake pad. As shown in FIGS. 1 to 12, the two discs 1 are made of an annular member having an open center and face each other, and the central portion 3 and the central portion 3 that can be attached to the axle of the vehicle. It is configured to include a main body 2 having a support portion 4 that is radially extended in the radial direction D and supports the two discs 1 while being separated by a predetermined dimension.

As shown in FIGS. 4, the disc 1 is made of an annular stainless steel material or the like having an opening 1a in the center and having a front surface f1 and a back surface f2, and as shown in FIGS. 1 to 3, two discs 1 are formed. Each back surface f2 of the disk 1 is joined to and supported by the support portion 4. The disc 1 is arranged at a position close to a brake pad (not shown) in a state where the ventilated brake disc is attached to the axle of the vehicle, and the driver operates the brake to obtain the disc 1. The brake pad presses each disc 1 to obtain a braking force.

As shown in FIGS. 5 to 12, the main body 2 has a central portion 3 and a support portion 4 made of a metal member such as an aluminum material (a material containing aluminum as a main composition and including an aluminum alloy or the like). A plurality of support portions 4 are formed so as to project at equal intervals in the circumferential direction of the central portion 3 attached to the axle of the vehicle. That is, in the main body 2 according to the present embodiment, the central portion 3 and the plurality of support portions 4 are separated from each other, and the main body 2 is configured by assembling each support portion 4 to the central portion 3. be.

As shown in FIGS. 5 to 7, the central portion 3 according to the present embodiment is composed of a cylindrical member, and is formed on a central hole 3a having a large opening in the center and an outer peripheral portion of the central hole 3a to be formed on an axle. It has a plurality of mounting holes 3b through which a cylinder (not shown) can be inserted. Further, in the central portion 3 according to the present embodiment, a plurality of mounting openings 3c are formed on the side surface thereof in the circumferential direction, and the support portion 4 can be fitted into each mounting opening 3c. There is.

The support portion 4 is made of a metal member similar to the main body 2, and is extended radially from the central portion 3 in a plurality of radial directions to support the two discs 1 while being separated by a predetermined dimension. As shown in 8, it is composed of a pipe-shaped member having a rectangular cross section. The support portion 4 has an internal space 4a through which the inside thereof penetrates in the extending direction, and has substantially the same shape and cross-sectional shape as the mounting opening 3c of the central portion 3.

Further, as shown in FIGS. 9 to 11, the support portions 4 according to the present embodiment are fitted into the mounting openings 3c of the central portion 3 so as to radiate from the central portion 3 in the radial direction. A plurality of them are extended and assembled, and the back surface f2 of the disk 2 is brought into contact with the front and back surfaces of each support portion 4 and joined by brazing or the like (see FIGS. 1 and 2). As a result, the two discs 1 are supported by the support portion 4 while being separated by a predetermined dimension.

Then, after inserting a bolt into the mounting hole 3b to attach the ventilated brake disc to the axle of the vehicle, when the vehicle travels and the wheels rotate, the space between the adjacent support portions 4 and the internal space 4a The air flows from the inside to the outside, and the support portion 4 functions as a fin to obtain a cooling effect on the disc 1. In this way, the braking performance can be maintained by allowing air to flow between the two discs 1.

Here, in the ventilated brake disc according to the present embodiment, the central portion 3 and the plurality of support portions 4 are separated from each other, and the support portion 4 is provided in the mounting opening 3c formed in the central portion 3. Are fitted together. As a result, when the two discs 1 generate heat due to the brake pads being pressed during braking of the vehicle, the heat is transmitted to the respective fin support portions 4 and each is in the extension direction (left-right direction in FIG. 12). Even if it expands or contracts, the support portion is allowed to be displaced in the extending direction, and thermal strain can be suppressed.

The support portion 4 according to the present embodiment has a function of supporting two discs 1 with a predetermined dimension apart (holding function), a function of forming a flow passage capable of allowing air to flow, and an air flowing through the flow passage. It is supposed to have a function of contacting and dissipating heat (cooling function as fins), and further, air can be circulated in the internal space 4a, and the support portion 4 is allowed to be displaced in the extending direction to generate heat. It has a function of suppressing distortion.

According to the present embodiment, the central portion 3 and the plurality of support portions 4 are separated from each other, and the support portions 4 are fitted into the mounting openings 3c formed in the central portion 3 (welding). Since it is not fixed by such means), it is possible to allow the support portion 4 to be displaced with respect to the central portion 3 in the extending direction, and when heat is transferred to the support portion 4 via the disk 1, thermal distortion occurs. Can be suppressed.

Further, since the support portion 4 according to the present embodiment is made of a pipe-shaped member, when the ventilated brake disc rotates with the wheels of the vehicle, in addition to the space between the adjacent support portions 4, the support portion 4 The internal space 4a functions as an air flow passage, and air can be effectively circulated outward, so that the heat dissipation effect can be further enhanced. Further, the support portion 4 according to the present embodiment is made of a member having a rectangular cross section, and the disc 1 is joined to the front and back surfaces of the support portion 4 while being in contact with each other. The disc 1 can be joined to the support portion 4 in a stable and reliable manner.

Although the present embodiment has been described above, the present invention is not limited to this. For example, as shown in FIGS. 13 and 14, the support portion 4'bends in an arc shape toward the circumferential direction of the central portion 3. It may be made up of. As shown in FIG. 14, the support portion 4'is composed of a pipe-shaped member having a rectangular cross section, and has an internal space 4'a through which the inside thereof penetrates in the extending direction.

In such a ventilated type brake disc, as in the above embodiment, the central portion 3 and the plurality of support portions 4 are separated from each other, and the mounting opening 3c formed in the central portion 3 (see FIG. 7). The support portions 4 are fitted to each other. According to the ventilated brake disc, the support portion 4 is bent in an arc shape toward the circumferential direction of the central portion 3, so that when the ventilated brake disc rotates with the wheels of the vehicle, the support portion 4 is formed in an arc shape. Air can be effectively circulated outward through the air flow path formed by the bent support portion 4, and the heat dissipation effect can be further enhanced.

Further, as shown in FIGS. 15 to 17, the support portion 4 "may be formed so as to be bent in the direction of the rotation axis of the main body 2. Such the support portion 4'is formed as being bent toward the rotation axis direction of the main body 2. It is composed of a pipe-shaped member having a rectangular cross section, and has an internal space 4 "a through which the inside thereof penetrates in the extending direction. Then, the central portion 3 and the plurality of support portions 4 "are separated from each other, and the support portions 4" are fitted into the mounting openings 3c (see FIG. 17) formed in the central portion 3, respectively. .. According to the ventilated brake disc, as shown in FIG. 17, the support portion 4 "is formed so that the base end thereof is fitted into the mounting opening 3c and the tip end portion side is bent downward. When the ventilated brake disc rotates with the wheels of the vehicle, the air flowing in the internal space 4 "a (see the arrow shown by the dotted line in FIG. 17) and the air flowing between the adjacent support portions 4" (see the arrow shown by the dotted line in FIG. 17). (See the arrow indicated by the alternate long and short dash line in the figure) occurs, so the heat dissipation effect can be further enhanced.

Further, although the support portions 4, 4', 4 "according to the present embodiment are composed of pipe-shaped members having a rectangular cross section, they may be solid members (rod-shaped members) or have a rectangular cross section. The shape may be other than the shape. In the present embodiment, the disc 1 is joined to the support portion 4 by brazing, but it may be joined by another joining method such as welding. ..

If it is a ventilated type brake disc in which the central portion and the plurality of support portions are separated from each other and the support portions are fitted to the mounting openings formed in the central portion, the other form is used. It may be a thing.

1 Disk 2 Main body 3 Central part 3a Central hole 3b Mounting hole 3c Mounting opening 4, 4', 4 "Support part 4a, 4'a, 4" a Internal space f1 Front surface f2 Back surface

Claims (4)

Two discs facing each other, consisting of an annular member with an open center,
A central portion that can be attached to the axle of a vehicle, and a main body that has a plurality of radial portions extending radially from the central portion to support the two discs while being separated by a predetermined dimension.
In a ventilated brake disc equipped with
A ventilated brake disc characterized in that the central portion and the plurality of support portions are separated from each other, and the support portions are fitted to the mounting openings formed in the central portion. .. The ventilated brake disc according to claim 1, wherein the support portion is made of a pipe-shaped member. The ventilated brake disc according to claim 1 or 2, wherein the support portion is made of a member having a rectangular cross section, and the disc is joined to the front and back surfaces thereof while being in contact with each other. The ventilated brake disc according to claim 1 or 2, wherein the support portion is bent in an arc shape toward the circumferential direction of the central portion.

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