JPH0353063Y2 - - 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.

In contrast, by spot welding the metal plate material to the dust cover through the mounting hole provided in the fixing part of the air scoop, the dust cover can be installed with the fixing part of the air scoop sandwiched between the dust cover and the metal plate material. It is thought that the above problem can be solved if the air scoop is fixed to the dust cover, but the air scoop is positioned with respect to the dust cover with the fixed part of the air scoop sandwiched between the dust cover and the metal plate. The work is relatively tedious.

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 object of the present invention is to provide a technique for easily positioning both of them. 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 disc-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. Further, a positioning protrusion protruding toward the dust cover is integrally provided on the fixed part, and the dust cover is molded of metal, and the positioning protrusion is fitted into a position corresponding to the positioning protrusion of the dust cover. A fixing part of the air scoop is attached to the dust cover by providing a positioning hole that can be fitted, and spot welding a metal plate to the dust cover through the mounting hole with the positioning protrusion fitted into the positioning hole. and a metal plate.

Operation and Effects of the Idea With this method, by spot welding the metal plate material to the dust cover through the air scoop mounting hole, the fixing part of the air scoop is sandwiched between the dust cover and the metal plate material. Since it is fixed with Conventionally used spot welding equipment can be used as is without replacing it with other fixing equipment.

Furthermore, the air scoop can be easily positioned with respect to the dust cover by simply fitting the positioning projection integrally provided on the fixing portion of the air scoop into the positioning hole provided on the dust cover.

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 disk shape as a whole, and is fixed to a non-rotating member (not shown) on its inner circumferential side, thereby covering from one side a disk rotor 12 rotatably provided on the non-rotating member. Prevent muddy water etc. from adhering to 12th grade. 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 projects 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
As shown in the figures and FIG. A pair of positioning protrusions 26 are provided between the air scoops 18 in a state perpendicular to the fixing portion 20 in the plate thickness direction.
It is integrally protruded during molding. on the other hand,
A pair of positioning holes 28 are provided in the vicinity of the through hole 16 of the dust cover 10 at positions corresponding to the positioning projections 26, and the positioning projections 26 are fitted into each of the positioning holes 28, respectively. In this state, metal plates 30 having substantially the same shape as the fixing part 20 are spot welded to the dust cover 10 through the mounting holes 24, so that the fixing part 20 of the air scoop 18 is connected to the dust cover 10 and the metal plate 30. It is fixed between the The metal plate material 30 is also provided with a pair of through holes 32 at positions corresponding to the positioning projections 26, and when the positioning projections 26 and the through holes 32 are fitted into each other, the metal plate material 30 is A plate material 30 is spot welded to the dust cover 10.

In this way, according to this embodiment, the metal plate material 30
By spot welding the air scoop 18 to the dust cover 10 through the mounting hole 24 of the fixing part 20, the fixing part 20 of the air scoop 18 is fixed between the dust cover 10 and the metal plate 30. Even when the air scoop 18 is made of resin, it is possible to fix the air scoop 18 to the dust cover 10 by spot welding. The existing spot welding equipment can be used as is without replacing it with other fixing equipment.

Furthermore, by simply fitting the positioning protrusion 26 integrally provided on the fixing portion 20 of the air scoop 18 into the positioning hole 28 provided on the dust cover 10, the air scoop 18 can be easily positioned with respect to the dust cover 10. It is done to.

Further, according to this embodiment, there is an advantage that the metal plate 30 can be easily positioned with respect to the air scoop 18 based on the fitting between the positioning protrusion 26 and the through hole 32 of the metal plate 30. .

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 addition, in the above-mentioned embodiment, the positioning protrusion 2
6 is formed in a cylindrical shape, but by forming the positioning protrusion 34 in the shape shown in FIG.
It may also be arranged to prevent it from coming off.

Further, in the above-mentioned embodiment, three circular mounting holes 24 are provided, but this is not necessary, and the number of mounting holes may be two or four or more. In the case where a relatively long elongated hole is formed and the metal plate is spot-welded to the dust cover through the mounting holes at multiple locations spaced apart from each other by a predetermined distance, the number of holes may be one.

Furthermore, in the above embodiment, the positioning protrusion 2
Although two holes 6 and two positioning holes 28 are provided, this is not necessarily necessary, and the effects of the present invention can still be obtained even if, for example, one hole each is provided.

Further, in the above-mentioned embodiment, the positioning protrusion 26 is provided to be perpendicular to the fixing part 20, and the positioning protrusion 26 allows the metal plate material to be
0 is also configured to be positioned with respect to the air scoop 18, but this is not necessarily necessary, and the positioning protrusion may be configured to protrude only toward the dust cover 10 from the fixing portion 20. In this case, it is also possible to separately provide a relatively small metal plate for each attachment 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 drawings]

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... Mounting hole, 26, 34...
Positioning protrusion, 28...Positioning hole, 30...
...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 disk-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. A positioning protrusion protruding toward the dust cover is integrally provided on the fixing part, and the dust cover is molded from metal, and the positioning protrusion fits into a position corresponding to the positioning protrusion of the dust cover. The fixing part of the air scoop can be fixed by providing a positioning hole that allows the air scoop to be mounted, and spot welding a metal plate to the dust cover through the mounting hole with the positioning protrusion fitted into the positioning hole. A dust cover for a disc brake, characterized in that the dust cover is sandwiched and fixed between the dust cover and the metal plate.