CN203836035U - Brake dust shield - Google Patents

Abstract

The utility model relates to a brake dust cover (1), which is arranged to cover a disc-shaped rotor (2) fixed on a wheel hub (3) from the inner side of the vehicle, and a through hole (1c) is formed in the central part (1b). The hub is inserted into the through hole and the bearing (5) that rotatably supports the hub from the outside. The upper part (1e) is formed with an opening (1f) for introducing air from the lower side of the vehicle into the disc rotor. A lower protruding portion (1g) protruding obliquely upward outside the vehicle from the lower edge (1h) of the opening hole and extending in the front-rear direction of the vehicle is also provided. The water intruding from the upper side of the vehicle passes through the opening hole and is blocked by the lower protrusion so that it cannot enter the central part. It flows toward the inner side of the vehicle on the upper surface of the lower protrusion and is discharged to the lower side of the vehicle without touching it. bearings. Therefore, in a state where the bearing is inserted into the through hole formed in the central portion, water intrusion into the bearing can be reduced.

Description

Brake dust cover

technical field

The utility model relates to a brake dustproof cover of a vehicle.

Background technique

As a conventional brake boot, for example, the brake boot disclosed in Japanese Patent Application Laid-Open No. 11-078407 is provided with opening holes for introducing air to cool the brake. Other prior art documents related to the present utility model include Japanese Patent Laying-Open No. 2010-159849.

However, in the existing brake boots, since the center part is formed with a through hole for inserting the bearing, if an opening hole is provided at the upper part, the water intruded from the opening hole will further intrude into the inside of the bearing, thereby possibly cause bearing failure. Therefore, in vehicles such as sports utility vehicles (SUVs) that are used in harsh environments, it is necessary to avoid providing openings in the upper part of the brake boots in order to prevent water from intruding into the bearings, thereby limiting the improvement of brake cooling performance.

Utility model content

The technical problem to be solved by the utility model is to provide a brake dust cover that does not limit the improvement of the cooling performance of the brake and can reduce the water intrusion of the bearing.

In order to solve the above technical problems, the brake dust cover of the utility model is set to cover the disk-shaped rotor fixed on the hub from the inside of the vehicle, and the central part is formed with a through hole, which is inserted into the hub and can rotate freely from the outside. The bearing supporting the hub is formed on the upper part with an open hole for introducing air from the lower side of the vehicle into the disc rotor, and a lower protrusion is provided from the lower side protrusion. The lower edge of the opening hole protrudes obliquely upward outside the vehicle and extends in the front-rear direction of the vehicle.

An upper protruding portion protruding obliquely downward inside the vehicle from the upper edge of the opening hole and extending in the front-rear direction of the vehicle may be further provided.

It may also be arranged to cover the disc rotor fixed on the hub from the inside of the vehicle, and a through hole is formed in the central part, and the hub and a bearing for freely supporting the hub from the outside are inserted into the through hole, and the upper part is formed with a an opening hole for introducing air from the lower side of the vehicle into the disc rotor, and an upper side protrusion that slopes from the upper edge of the opening hole toward the vehicle inner side. The bottom protrudes and extends along the front-rear direction of the vehicle.

According to the brake dust cover of the present invention, the air introduced from the lower side of the vehicle is introduced into the disc rotor after passing through the upper opening. Therefore, the cooling performance of the brake can be improved. In addition, the water intruding from the upper side of the vehicle is prevented from intruding into the central part by the protruding part provided on the upper part. Since the protruding part is inclined to the vehicle inner side, it flows toward the vehicle inner side on the upper surface of the protruding part and is discharged to the vehicle. underside without touching the bearings. Therefore, in a state where the bearing is inserted into the through hole formed in the central portion, water intrusion into the bearing can be reduced.

Description of drawings

Fig. 1 is a front view of a brake dust cover according to a first embodiment of the present invention.

Fig. 2 is a sectional view along line A-A in Fig. 1 .

FIG. 3A is an enlarged view of a part of FIG. 2 .

Fig. 3B is a view corresponding to Fig. 3A of the brake dust cover according to the second embodiment of the present invention.

Fig. 3C is a view corresponding to Fig. 3A of the brake dust cover according to the third embodiment of the present invention.

4 is a cross-sectional view showing an air path in a state where the brake boot according to the first embodiment of the present invention is installed in a wheel.

FIG. 5 is a perspective view of FIG. 4 .

6 is a cross-sectional view showing a water intrusion path in a state where the brake boot according to the first embodiment of the present invention is installed in a wheel.

In the figure 1, brake dust cover 1b, central part 1c, through hole 1e, upper part 1f, opening hole 1g, lower protrusion 1h, lower edge 2, disc rotor 3, hub 5, bearing

Detailed ways

The first embodiment of the present utility model will be described below in conjunction with the accompanying drawings. In addition, since this embodiment is characterized by the structure of the brake boot, the following description will focus on the structure and function of the brake boot, and descriptions of other vehicle components will be simplified or omitted.

As shown in Figures 4 to 6, the brake dust cover (hereinafter referred to as the dust cover) 1 is set to cover the disc rotor 2 of the disc brake from the inside of the vehicle, mainly to prevent dust and foreign matter from invading into the disc rotor 2 from the inside of the vehicle. The role of rotor 2.

The disc rotor 2 is fixed on the hub 3 by bolts 4 etc. and rotates together with the wheel. The disc rotor 2 is a ventilated rotor. As shown in FIG. 5, a plurality of cooling fins 2a are arranged inside. A plurality of ventilation holes 2b penetrating from the inner peripheral side to the outer peripheral side of the disk rotor 2 are formed by the fins 2a.

The dust cover 1 can be formed integrally from a metal plate using extrusion molding, and has a substantially ring-shaped outer shape corresponding to the shape of a wheel. As shown in FIG. 1 , the dust cover 1 has a notch 1 a at a position corresponding to the position where a disc brake (caliper, etc.) is disposed. The central portion 1b of the dust cover 1 is formed with a through hole 1c. As shown in FIGS. 4 and 6 , the hub 3 and the bearing 5 are inserted into the through hole 1c. The bearing 5 rotatably supports the hub 3 from the outside. In addition, four mounting holes 1d are formed around the through hole 1c around the through hole 1c. The dust cover 1 is fixed on the steering knuckle 6 through these mounting holes 1d. With the dust cover 1 as a boundary, the part of the bearing 5 located inside the vehicle is covered by the protruding part 6 a of the steering knuckle 6 protruding in the direction of the vehicle outside. Therefore, the portion of the bearing 5 covered by the protrusion 6a does not come into contact with water. In addition, in order to increase strength or avoid interference with other components, the surface of the dust cover 1 is provided with concavo-convex shapes.

The upper part 1e of the dust cover 1 is formed with an opening hole 1f. The opening hole 1 f is used to introduce air from under the vehicle into the disk rotor 2 . In addition, the dust cover 1 is further provided with a lower protrusion 1g. As shown in FIGS. 1 to 3A , the lower protruding portion 1g protrudes obliquely upward on the outside of the vehicle from a lower edge 1h of the opening hole 1f, and extends in the front-rear direction of the vehicle. That is, the inclination angle θ as shown in FIG. 3A is greater than 0°. The lower protrusion 1g is used to prevent water from entering the bearing 5 from the upper side of the vehicle. And the size and position of the opening hole 1f and the inclination angle θ of the lower protrusion 1g, the protrusion length, and the extension length can be adjusted according to the specific shape of the ventilation hole 2b of the disc rotor 2 to facilitate the introduction of air and prevent the intrusion of water . In this embodiment, the opening hole 1f is formed by cutting out a part of the upper part 1e, and the lower protrusion part 1g is formed. The lower protruding portion 1g in this embodiment is formed by cutting from the upper end 1i where the opening hole 1f is formed and then bending toward the disk rotor 2 side (vehicle outer side). In addition, openings are also formed on the side and bottom of the dust cover 1, but the water intruded from these openings is discharged to the lower side of the vehicle without intruding into the bearing 5, so no protrusions are provided on the edges of these openings.

4 and 5, the air introduced from the lower side of the vehicle passes through the opening 1f and is guided into the ventilation hole 2b of the disk rotor 2 under the guidance of the lower protrusion 1g. Thereby, the cooling performance of the disc brake can be improved.

In addition, in the water intrusion path shown by the dotted line in FIG. 6, the water that intrudes from the upper side of the vehicle and passes through the opening hole 1f is prevented by the lower protrusion 1g from intruding into the central part 1b. The inside of the vehicle is inclined, so it flows toward the inside of the vehicle on the upper surface of the lower protruding portion 1g and then is discharged to the lower side of the vehicle along the outer surface of the protruding portion 6a of the steering knuckle 6 without contacting the bearing 5 . Therefore, in a state where the bearing 5 is inserted into the through hole 1c formed in the central portion 1b, water intrusion into the bearing 5 can be reduced.

The utility model is not limited to the specific embodiments described above, and can be implemented in various ways. For example, the protruding portion is not limited to the lower protruding portion, and an upper protruding portion 1l may be provided as shown in FIG. The vehicle extends in the front-rear direction, and both the lower protrusion 1g and the upper protrusion 1l may be provided as shown in FIG. 3C . In the case of providing the upper protrusion 1l, it may be cut from the lower end 1m where the opening hole 1j is formed and then bent toward the vehicle inner side. On the other hand, in the case where both the lower protrusion 1g and the upper protrusion 1l are provided, the portion to be the upper protrusion should be directed toward the inside of the vehicle by cutting in opposite directions from the middle of the position where the opening hole is formed. For side bending, it is sufficient to bend the portion to be the lower protrusion toward the outside of the vehicle. In addition, the protruding portion is not limited to cutting out a part of the upper part and then bending it. For example, a part of the upper part may be dug out to form an opening hole, and the part dug out may be used as a protruding part and fixed to the opening hole by welding or the like. upper edge or lower edge etc.

In addition, when the upper protrusion 1l is provided on the dust cover 1, the air introduced from the lower side of the vehicle is guided by the upper protrusion 1l and introduced into the ventilation hole 2b of the disk rotor 2 through the opening 1j. Thereby, the cooling performance of the disc brake can be improved. In addition, the water intruding from the upper side of the vehicle is prevented by the upper protrusion 1l so that it cannot pass through the opening 1j and enters toward the center portion 1b, flows on the upper surface of the upper protrusion 1l toward the vehicle inner side, and then flows along the steering knuckle 6. The outer surface of the protruding portion 6 a is discharged toward the underside of the vehicle without contacting the bearing 5 . Therefore, in a state where the bearing 5 is inserted into the through hole 1c formed in the central portion 1b, water intrusion into the bearing 5 can be reduced. Also, when the dust cover 1 is provided with both the lower protrusion 1g and the upper protrusion 1l, the cooling performance of the disc brake can be improved and water intrusion into the bearing 5 can be reduced as a matter of course from the above description.

Claims (3)

1. a brake dust, be set to cover from vehicle interior side the discal rotor being fixed on wheel hub, and core is formed with through hole, in this through hole, insert described wheel hub and rotate the bearing that supports freely described wheel hub from outside, it is characterized in that: top is formed with open pore, this open pore is for importing to described discal rotor from the air of vehicle lower side, also be provided with downside protuberance, this downside protuberance is outstanding to the oblique upper of vehicle outside from the lower limb of described open pore, and extends along the fore-and-aft direction of vehicle.

2. according to brake dust claimed in claim 1, it is characterized in that: be also provided with upside protuberance, this upside protuberance is outstanding to the oblique below of vehicle interior side from the top edge of described open pore, and extends along the fore-and-aft direction of vehicle.

3. a brake dust, be set to cover from vehicle interior side the discal rotor being fixed on wheel hub, and core is formed with through hole, in this through hole, insert described wheel hub and rotate the bearing that supports freely described wheel hub from outside, it is characterized in that: top is formed with open pore, this open pore is for importing to described discal rotor from the air of vehicle lower side, also be provided with upside protuberance, this upside protuberance is outstanding to the oblique below of vehicle interior side from the top edge of described open pore, and extends along the fore-and-aft direction of vehicle.