JPH0353068Y2 - - 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. Then, such an air scoop is fixed to the dust cover by spot welding.

Problems to be solved by this invention However, if the above air scoop is made of resin or rubber, it cannot be fixed to the dust cover by spot welding, so separate fixing members such as rivets or screws are required. There were problems such as an increase in the number of parts.

Means for Solving the Problems The present invention was developed against the background of the above circumstances, and its purpose is to provide a dust cover for attaching a resin or rubber air scoop to a dust cover without using a fixing member. The purpose is to provide technology that fixes the In order to achieve this object, the present invention includes a through hole provided on the outer periphery and an air scoop fixed in the vicinity of the through hole, and is arranged so as to cover the disk rotor from one side. In a disc-shaped dust cover for a disc brake that uses the air scoop to introduce outside air from a through hole toward the disc rotor, the air scoop is molded from resin or rubber, and the air scoop is made of resin or rubber, and the dust cover is brought into contact with the dust cover. It is composed of a contact part and an outside air introduction part that projects from one end side of the contact part while being inclined in a direction away from the disk rotor, and a first engagement protrusion is integrally provided on the contact part, and the outside air introduction part is provided integrally with the contact part. A rod-shaped portion that protrudes toward the dust cover and has a second engagement protrusion at the protruding end is integrally provided on the tip side of the part, and the first engagement protrusion is provided with a snap in the vicinity of the through hole of the dust cover. a first engagement hole that is engaged with the action being prevented from coming off by an action, and a second engagement that is engaged with the second engagement protrusion being prevented from coming out by a snap action. by providing a hole, and engaging the first engagement protrusion of the abutment part with the first engagement hole, and engaging the second engagement protrusion of the rod-shaped part with the second engagement hole. It is characterized by a fixed air scoop.

Operation and Effects of the Invention By doing this, the first engagement protrusion integrally provided on the abutting portion of the air scoop made of resin or rubber can be snapped into the first engagement hole provided in the dust cover. The second engagement protrusion of the rod-shaped part integrally provided on the tip side of the outside air introduction part of the air scoop is engaged with the dust cover in a state in which the dust cover is prevented from coming off. The air scoop is fixed to the dust cover by being engaged with the hole with a snap action that prevents it from coming off, so even when fixing a resin or rubber air scoop to the dust cover, A separate fixing member such as a rivet is not required, reducing the number of parts, and the air scoop can be easily and quickly fixed to the dust cover based on the snap action.

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

FIG. 3 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. 3) when the vehicle moves forward is
As shown in FIGS. 2 and 3, a plurality of elongated through holes 16 are provided adjacent to each other,
On the surface of the dust cover 10 opposite to the disk rotor 12 side and near the through hole 16, there is a disk that generates heat during braking by introducing outside air from the through hole 16 toward the disk rotor 12 as the vehicle moves forward. A resin air scoop 18 for cooling the rotor 12 and the like is fixed.

As shown in FIGS. 1 to 3, the air scoop 18 is brought into contact with a portion located near the through hole 16 of the dust cover 10 and on the downstream side when rotating in the direction of the disk rotor 12A. It consists of a contact part 20, and an outside air introduction part 22 that projects from one end of the contact part 20 while being inclined in a direction away from the disc rotor 12 as it goes in the forward direction of the vehicle (leftward in FIG. 3). The outside air introducing portion 22 allows outside air to be suitably introduced when the vehicle is traveling forward. A pair of first engaging protrusions 24 and 26 are integrally provided on the other end side of the contact portion 20 (the side opposite to the outside air introduction portion 22 side) and are spaced apart from each other by a predetermined distance. A rod-shaped portion 30 that protrudes toward the dust cover 10 and has a second engaging protrusion 28 at its protruding end is integrally provided on the tip side of the rod-shaped portion 22 . Although the tips of the pair of first engaging protrusions 24 and 26 have a stepped shape, they do not necessarily have to have such a shape.

On the other hand, as shown in FIGS. 1 and 2, a portion of the dust cover 10 is provided with a disk at a position near the through hole 16 of the dust cover 10 and corresponding to the first engaging protrusions 24 and 26, respectively. Rotor 1
By being cut out in the direction away from 2,
A pair of arch-shaped engaging portions 36 and 38 having first engaging holes 32 and 34 are formed, and a second engaging protrusion 28 of the rod-shaped portion 30 is located near the through hole 16 of the dust cover 10. A second engagement hole 40 is formed at a position corresponding to . and,
The first engagement protrusions 24 and 26 are connected to the first engagement holes 32 and 34
Then, the second engagement protrusions 28 are inserted into the second engagement holes 40 and engaged with each other while being prevented from coming off by the snap action, so that the air scoop 18 is attached to the dust cover 10. is fixed. As a result, even when fixing the air scoop 18 made of resin to the dust cover 10, there is no need for a separate fixing member such as a rivet, and the number of parts can be reduced. is easily and quickly fixed to the dust cover 10.

Further, according to the present embodiment, the second engagement protrusion 28 of the rod-shaped portion 30 provided on the tip side of the outside air introduction portion 22
is engaged with the second engagement hole 40 of the dust cover 10 in a state where the air scoop 18 is prevented from coming off. Even if the outside air introduction part 22 is pressed in a direction away from the dust cover 10 by the outside air with a relatively large pressing force while the vehicle is running, the position of the outside air introduction part 22 can be maintained suitably.

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.
Air scoop 1 that can improve the vibration strength of 0 and has relatively elasticity compared to metal ones
Even when the air scoop 18 and the dust cover 8 come into contact with other members, deformation (permanent deformation) of the air scoop 18 and the dust cover 10 can be effectively prevented.

In the above-mentioned embodiment, an engaging protrusion substantially similar to the first engaging protrusions 24 and 26 is provided at the protruding end of the rod-shaped portion 30, and the engaging protrusion is connected to the first engaging protrusion 2.
4, 26 may be engaged with the dust cover 10, or the surface of the contact portion 20 located on the dust cover 10 side may be engaged in substantially the same manner as the second engagement protrusion 28. A protrusion may be provided and the engagement protrusion may be engaged with the dust cover 10 in the same manner as the second engagement protrusion 28 .

Further, in the above-mentioned embodiment, a pair of first engaging protrusions are provided and one rod-shaped portion having a second engaging protrusion is provided, but this is not necessarily necessary, and only one first engaging protrusion is provided. Alternatively, three or more rod-shaped portions may be provided, or a plurality of rod-shaped portions having second engaging protrusions may be provided.

Further, in the above embodiment, the contact portion 20 may be fixed to the dust cover 10 as shown in FIG. 4, for example. In the figure, dust cover 1
The other end side of the abutting portion 20 is located between the dust cover 10 and the L-shaped engaging pieces 42 and 44 which are formed by cutting and raising a part of the dust cover 10 and have heads substantially parallel to the dust cover 10. In the inserted state, the first engaging protrusion 46 provided on the other end side of the abutting portion 20
is engaged with the first engagement hole 48 of the dust cover 10 by a snap action in a state where it is prevented from coming off. In other words, in the claims, "a state in which removal is prevented" is used to include a "state in which removal is prevented."

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 showing a main part of the view along arrow B in FIG. 3, with a part cut away. FIG. 2 is a perspective view of FIG. 1. FIG. 3 is a front view of a dust cover to which the present invention is applied.
FIG. 4 is a diagram showing another example of the present invention, and is a perspective view showing the main parts. 10...Dust cover, 12...Disc rotor, 16...Through hole, 18...Air scoop, 2
0... Contact part, 22... Outside air introduction part, 24, 2
6, 46...First engagement protrusion, 28...Second engagement protrusion, 30...Bar-shaped portion, 32, 34, 48...First engagement hole, 40...Second engagement hole.

Claims (1)

[Scope of Claim for Utility Model Registration] A disc rotor is provided with a through hole provided on the outer periphery and an air scoop fixed in the vicinity of the through hole, and is disposed so as to cover the disk rotor from one side, and the air scoop In a disk-shaped dust cover for a disc brake that introduces outside air toward the disc rotor through the through hole, the air scoop is molded from resin or rubber and a contact portion is brought into contact with the dust cover. and an outside air introduction part that projects from one end side of the corresponding contact part while being inclined in a direction away from the disc rotor, and a first engaging protrusion is integrally provided on the relevant contact part, and the front end side of the outside air introduction part is integrally provided with a rod-shaped portion that protrudes toward the dust cover and has a second engagement protrusion at the protruding end, and the first engagement protrusion is provided with a snap action in the vicinity of the through hole of the dust cover. A first engagement hole that is engaged in a state in which the second engagement protrusion is prevented from coming off, and a second engagement hole that is engaged in a state in which the second engagement protrusion is prevented from coming out by a snap action are provided. , fixing the air scoop by engaging a first engagement protrusion of the abutment part with the first engagement hole and engaging a second engagement protrusion of the rod-shaped part with the second engagement hole; A dust cover for disc brakes.