JPH0124931B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a buff-full plate for a disc brake.

[Conventional technology and its problems]

In disc brakes, the rotor is attached to the outer end flange of the axle hub or axle shaft, which is the rotating part of the vehicle, and is attached to the outer end flange of the axle hub or axle shaft. A buttful plate is attached to the rotating part of the nut or axle housing (Utility Model No. 52-60589). For this reason, even though disc brakes generally have excellent heat dissipation performance,
When braking frequently, ventilation is obstructed by the bumpy plate, causing the rotor and brake pads to become hot, which can accelerate brake pad wear.
This causes problems such as a decrease in braking force, vapor lock, and rotor deformation.

[Purpose of the invention]

Accordingly, the present invention forms a through hole in a part of the buttful plate, and protrudes inward in the vehicle width direction.
A synthetic resin louver member having only a through hole facing the forward direction of the vehicle and having a plurality of through holes arranged in the longitudinal direction of the vehicle is fitted into the through hole. To provide a buttful plate for a disc brake that allows ventilation only through the ventilation holes of the louver member, prevents foreign matter from entering the buttfull plate as much as possible, improves the heat dissipation performance of the disc brake, and eliminates the above-mentioned problems. intended to provide.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a cross-sectional view showing the structure of the front axle of the drive wheels in an independent suspension system.
A plate washer 4 is connected to the shaft 3.
The axle hub 6 is attached by tightening the nut 5 through the interposition. Axle hub 6, which is the rotating part of the vehicle
A wheel 8 is attached with a plurality of bolts 7, and a rotor 10 is attached with a plurality of bolts 9. A knuckle 11, which is a non-rotating part of the vehicle, is supported by the axle hub 6 with an inner bearing 12 and an outer bearing 13 interposed on the outer periphery of the axle hub 6.

14 is an inner oil seal, and 15 is an outer oil seal.

And, on the annular side surface 11a of the nutcle 11,
In order to prevent foreign matter such as muddy water and pebbles from entering or adhering to the rotor 10, the buffful plate 16 is fixed with a plurality of screws 18. Inside the wheel 8 and in the forward direction of the vehicle, as shown by the imaginary line in FIG. A caliper 21 of a pad type disc brake 20 is provided, and both pads 22 and 23 of the caliper 21 clamp the rotor 10 to generate braking force.

Figure 2 shows a full plate 1 that covers the rotor 10.
6 is shown. Removal portion 16a of buff full plate 16
is a space for mounting the caliper 21, and the hole 16b in the center is a hole for mounting to the knuckle 11. And, the rounded full plate main body 16c has an annular shape.
A louver member 17 is attached to the louver member 17. As shown in FIG. 3, the louver member 17 has a fan-shaped through hole formed in the buttful plate main body 16c, and a louver member 17 having a partition plate 17a molded from synthetic resin is attached to the periphery of the through hole. It is formed by fitting in the annular groove 17c provided. The louver member 17 may be formed on substantially the entire surface of the buttful plate main body 16c as shown in FIG. 2, or may be formed on a limited portion. When the louver member 17 is to be attached to a limited portion, it is preferable that the louver member 17 be attached near the cutout portion 16a to allow ventilation to the sliding friction portion between the rotor 10 and both pads 22 and 23. Thus, the buff-full plate 16 itself allows ventilation only through the louver member 17, and has no other ventilation ports (openings, ducts, etc.).

By the way, the plurality of through holes 17b forming the elongated holes of the louver member 17 are arranged in sequence in the longitudinal direction of the vehicle, and the direction of each through hole 17b is all in the forward direction of the vehicle. By sequentially forming a plurality of through holes 17b in the front-rear direction of the vehicle, air that collides with and reflects against suspension members located on the inside in the vehicle width direction is effectively diverted from any one of the through holes 17b. This is to effectively flow out the air taken in and used for cooling from the other through hole 17b which is at a relatively low pressure.
This is to incline in the forward direction of the vehicle and protrude inward in the vehicle width direction to effectively take in air and prevent foreign matter from entering as much as possible. That is, since foreign objects such as muddy water and pebbles are caught in the tires and scattered from the rear while the vehicle is running, the louver member 17
It is effective to make each through hole 17b project inward in the vehicle width direction and face in the forward direction. In addition, from the viewpoint of preventing foreign matter from entering, the width of each through hole 17b of the louver member 17 should be appropriately narrow within a range that does not impair ventilation, and as shown in FIG. An intrusion prevention material 17d can be attached in a grid pattern to also serve as reinforcement.

Therefore, when the vehicle is running, the louver member 17
The air flowing in from either of the through holes 17b cools the rotor 10 or the pads 22, 23, and cools the rotor 10 or the pads 22, 23, and cools the rotor 10 or the pads 22, 23, and cools the rotor 10 or the pads 22, 23, and cools the rotor 10 or the pads 22, 23, and cools the rotor 10 or the pads 22, 23, and cools the rotor 10 or the pads 22, 23.
and the rotor 10.

As mentioned above, the general method for attaching the full plate 16 to a vehicle is to fasten the screws 18 to the non-rotating part of the vehicle, but recently the mounting hole 16b has been made cylindrical and is press-fitted into the non-rotating part of the vehicle. It is installed by In this case, as shown in FIG. 5, a part of the tip of the cylindrical portion is bent inward to prevent the rotation of the buttful plate 16', and the locking piece 1 is bent inward.
6'd, and a groove that engages with the non-rotating part of the vehicle, which is the attached part, is preferably formed. This makes it easy to prevent the buff-full plate 16' from rotating and to position it during installation.

The cylindrical mounting hole also has manufacturing tolerance variations at its tip compared to its root. Therefore, we decided to make the diameter of the tip slightly smaller and cut the notch 1 in the axial direction.
It is preferable to press-fit the buff-full plate 16'', which is formed with a diameter of 6''e and whose diameter can be expanded elastically, into a non-rotating portion of the vehicle.

〔Effect of the invention〕

As explained above, the buttful plate for disc brakes according to the present invention has a through hole formed in a part of the buttful plate, and only has a through hole that protrudes inward in the vehicle width direction and faces in the forward direction of the vehicle. A louver member made of synthetic resin having a plurality of through holes arranged in the longitudinal direction of the vehicle is fitted into the through hole, and the full plate itself is configured to allow ventilation only from the through holes of the louver member. Therefore, the following effects can be obtained.

(1) Ventilation in the full plate is carried out only through the holes in the louver member that protrudes inward in the vehicle width direction and faces the forward direction of the vehicle, so while the vehicle is running,
The intrusion and adhesion of foreign objects such as muddy water and pebbles to the rotor due to the entanglement of the wheels is almost prevented, and a reduction in braking force can be prevented.

(2) Since air is trapped in the louver member and enters, the ventilation to the rotor and pads is much improved compared to simply providing openings in the buff-full plate, and the temperature of the rotor and pads increases. Any problems caused by this will be resolved.

(3) Since the louver member is formed as a separate member from the buttful plate main body, various louver members having different protruding heights and sizes of through holes can be attached to the same buttful plate main body. In other words, depending on the vehicle type, disc brake capacity, etc.
Appropriate louver members can be selected. In this case, the bulk plate main body can be used as is, which is economical.

(4) Since the louver member is made of synthetic resin, there is no risk of rust and is highly durable. That is, since the louver member protrudes inward in the vehicle width direction from the buttful plate main body, it is likely to be hit by pebbles and the like, and if it is made of metal, the paint will likely peel off and rust will occur.

(5) In particular, in so-called front disc brakes that have a caliper in the forward direction of the wheel, the caliper tends to block the airflow, but by applying the present invention, it is possible to provide a duct for air intake using a louver member. It produces almost the same blowing effect.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the structure of the front axle of the drive wheel of an independent suspension system, Fig. 2 is a front view of the buttful plate according to the present invention, Fig. 3 is a sectional view taken along the line - - of Fig. 2, and Fig. 4 FIG. 5 is a partial perspective view showing another structural example of the louver member, and FIGS. 1: Drive shaft, 6: Axle hub (rotating part), 1
0: Rotor, 11: Knuckle (non-rotating part), 1
6: Full plate, 16c: Full plate body, 17: Louver member, 17a: Partition plate, 1
7b: Through hole, 21: Caliper, 22, 23: Pad.

Claims (1)

[Claims] 1 A rotor attached to a rotating part of a vehicle, a caliper equipped with a pad that is supported by a support fixed to a non-rotating part of the vehicle and clamps the rotor, and a pad fixed to a non-rotating part of the vehicle and covering the rotor. In a disc brake having a full plate, a through hole is formed in a part of the full plate, and the through hole projects inward in the vehicle width direction and faces in the forward direction of the vehicle. A disk characterized in that a plurality of synthetic resin louver members arranged in the front and back direction are fitted into the through holes, and the butful plate itself allows ventilation only through the holes in the louver members. Full plate for brakes.