JPH0353061Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a dust cover for a disc brake, and particularly to a dust cover provided with an air scoop.

Prior Art Disc brakes are generally provided with a dust cover that covers the disc rotor from one side. In such a dust cover, a through hole is usually provided on the outer periphery of the dust cover, and an air scoop is fixed near the through hole on the surface of the dust cover opposite to the disk rotor side, so that the air scoop can be used when the vehicle is running. Outside air is introduced toward the disc rotor through the through hole to cool the disc rotor, etc., which generate heat due to braking. The air scoop is then fixed to the dust cover by spot welding.

Problems to be solved by this invention However, when the air scoop is made of resin or rubber, it becomes impossible to fix the two together by spot welding, and accordingly There was a problem in that in place of the spot welding equipment, new equipment suitable for fixing means other than welding had to be prepared.

Means for Solving the Problems The present invention was developed against the background of the above circumstances, and its purpose is to fix a resin or rubber air scoop to a dust cover using spot welding. The goal is to provide technology that will In order to achieve this object, the present invention is provided with a through hole provided on the outer periphery and an air scoop fixed near the through hole, which is disposed so as to cover the disk rotor from one side. In a plate-shaped dust cover for a disc brake that uses an air scoop to introduce outside air from a through hole toward a disc rotor, the air scoop is molded from resin or rubber, and a mounting hole is provided in the fixing part of the air scoop. On the other hand, the dust cover is formed of metal, and a protrusion that protrudes toward the air scoop and is fitted into the mounting hole is integrally provided in the vicinity of the through hole of the dust cover by drawing process, and the dust cover By spot welding a metal plate to the protruding part while fitting the protruding part of the air scoop into the mounting hole of the air scoop,
The air scoop is characterized in that the fixed part of the air scoop is sandwiched and fixed between the dust cover and the metal plate.

Effect of operation and invention With this method, by spot-welding the metal plate material to the protruding portion fitted into the mounting hole of the air scoop, the fixing portion of the air scoop can be connected to the dust cover and the metal plate material. Since the air scoop is fixed between the dust covers, even if the air scoop is made of resin or rubber, it is possible to fix the air scoop to the dust cover by spot welding. Then,
Spot welding equipment conventionally used in production lines etc. can be used as is without replacing it with other fixing equipment.

Moreover, based on the fitting between the protrusion of the dust cover and the mounting hole of the air scoop, there is an advantage that the relative positions of the two can be easily determined without using a positioning jig.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

FIG. 2 is a diagram showing a dust cover for a disc brake to which the present invention is applied. dust cover 1
0 has a plate shape as a whole, and is fixed to a non-rotating member (not shown) on its inner peripheral side, so that
The disk rotor 1 is covered from one side with the disk rotor 12 rotatably provided on the non-rotating member.
Prevent muddy water etc. from adhering to the 2nd class. A notch 14 is provided on the outer circumferential side of the dust cover 10 in order to avoid interference with a caliper (not shown) installed over the outer circumference of the disk rotor 12.

A portion of the outer periphery of the dust cover 10 located on the downstream side of the notch 14 in the direction of rotation of the disc rotor 12 (direction A in FIG. 2) when the vehicle moves forward is
A plurality of elongated through-holes 16 are provided adjacent to each other, and the area near the through-holes 16 on the surface of the dust cover 10 opposite to the disk rotor 12 is filled with outside air as the vehicle moves forward. A resin air scoop 18 is fixed thereto for cooling the disc rotor 12 and the like which generate heat during braking by introducing the disc rotor 12 from the through hole 16 toward the disc rotor 12. This air scoop 18 includes a fixing part 20 fixed to a part near the through hole 16 and located on the downstream side when rotating in the direction of the disk rotor 12A, and a fixing part 20 fixed to a part located downstream of the disk rotor 12A when rotating in the direction of the disk rotor 12A. The outside air introduction portion 22 protrudes further away from the disk rotor 12 in the direction (leftward in FIG. 2).
The outside air introducing portion 22 allows outside air to be suitably introduced when the vehicle is traveling.

The fixing portion 20 of the air scoop 18 includes a first
Three circular holes 24 as shown in FIG.
are provided at a predetermined distance from each other during molding of the air scoop 18, while holes are provided near the through hole 16 of the dust cover 10 in the direction away from the disk rotor 12, as shown in FIG. The circular hole 24 protrudes a predetermined distance.
Three protrusions 26 that are fitted into each circular hole 2 are integrally provided by drawing process.
Metal plates 28 having substantially the same shape as the fixing part 20 are spot-welded to the protruding end surfaces of the protruding parts 26 fitted to the dust cover 10 and the dust cover 10, respectively. It is fixed in a state where it is sandwiched between the plate material 28. In this embodiment, the circular hole 24 constitutes a mounting hole. This allows air scoop 1
Even when the air scoop 8 is made of resin, it is possible to fix the air scoop 18 to the dust cover 10 by spot welding, and accordingly, it is possible to fix the air scoop 18 to the dust cover 10 by spot welding. The welding equipment can be used as is without replacing it with other fixing equipment. Note that the protruding dimension of the protruding portion 26 is preferably slightly smaller than the wall thickness of the fixing portion 20. In this way, in a state where the metal plate material 28 is spot-welded to the protruding end surface of the protrusion part 26, the fixing part 20 is compressed with a predetermined pressing force between the dust cover 10 and the metal plate material 28. Therefore, rattling of the air scoop 18 is effectively prevented.

Further, according to this embodiment, based on the fitting between the protrusion 26 of the dust cover 10 and the circular hole 24 of the air scoop 18, the relative positions of the two can be easily determined without using a positioning jig. There is.

Further, according to the present embodiment, the protruding portion 26 having a protruding dimension substantially the same as the wall thickness of the fixing portion 20 is fitted into the circular hole 24 of the fixing portion 20,
Since the metal plate material 28 is spot-welded in a state in which it is substantially in contact with the protruding end surface of the protrusion part 26 in advance, the metal plate material 28 and the dust cover 1 during welding are compared to a case where such a protrusion part 26 is not provided.
There is an advantage that deformation of 0 is effectively prevented.

Further, according to this embodiment, since the air scoop 18 is molded from resin, it is lighter than a metal one, and accordingly, the dust cover 18 is made of resin.
In addition to improving the vibration strength of 0, the air scoop 18 and the dust cover 10 are not deformed (permanently deformed) even when the air scoop 18 comes into contact with other members etc. because it is relatively elastic compared to metal ones. can be effectively prevented.

In the above-mentioned embodiment, only the dust cover 10 is provided with the protrusion 26, but this is not necessary; for example, as shown in FIG. Protrusions 30 with small dimensions are provided, and protrusions 32 are provided on the metal plate 28 at positions corresponding to each of the protrusions 30 and protrude a predetermined distance toward the protrusions 30, and both protrusions 30 and 32 are spot welded. You can do it like this. In this case, as in the previous embodiment, the air scoop 18
In addition, the air scoop 1 of the metal plate 28 can be easily positioned with respect to the dust cover 10.
There is an advantage that positioning with respect to 8 is easy.

Further, in the above-mentioned embodiment, the mounting hole is composed of three circular holes 24, but it is not necessary. For example, only one elongated mounting hole is provided and the mounting hole is fitted into Metal plates may be spot-welded to the protruding end surface of the protruding portion at a plurality of locations spaced apart from each other by a predetermined distance.

Further, in the above embodiment, the metal plate 28
Although only one is provided, it is not necessary, and a relatively small metal plate may be provided for each circular hole 24.

Furthermore, in the above embodiment, the air scoop 18
is molded from resin, but may also be made from rubber.

In addition, various changes may be made to the present invention without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is an enlarged view of a main part of a cross section taken along the line - in FIG. 2. FIG. 2 is a front view of a dust cover to which the present invention is applied. FIG. 3 is a diagram showing another example of the present invention, and corresponds to FIG. 1. 10...Dust cover, 12...Disc rotor, 16...Through hole, 18...Air scoop, 2
0... Fixed part, 24... Circular hole (mounting hole), 26,
30...Protruding portion, 28...Metal plate material.

Claims (1)

[Scope of Claim for Utility Model Registration] The disk rotor is provided with a through hole provided on the outer periphery and an air scoop fixed near the through hole, and is disposed so as to cover the disc rotor from one side, and the air scoop allows outside air to flow through the disk rotor. A disc-shaped dust cover for a disc brake is introduced from the through hole toward the disc rotor, and the air scoop is molded from resin or rubber, and a mounting hole is provided in the fixing part of the air scoop. , the dust cover is formed of metal, and a protrusion that protrudes toward the air scoop and is fitted into the mounting hole is integrally provided near the through hole of the dust cover by drawing process, and the dust cover is formed by drawing. By spot welding a metal plate to the protrusion with the protrusion and the mounting hole of the air scoop fitted, the fixed part of the air scoop can be sandwiched between the dust cover and the metal plate. A dust cover for disc brakes that is fixed in a fixed position.