JPS61282633A - Brake disc with cooling hole - Google Patents

Abstract

PURPOSE:To prevent overheating of a brake disc, by forming cooling holes communicating both side surfaces of the brake disc and inclining each hole relative to an axis of a rotary shaft and relative to a rotational direction thereof. CONSTITUTION:A brake disc 1 is formed with cooling holes 5 each communicating one side surface 1b to the other side surface 1c. An opening 5a of the cooling hole 5 on the one side surface 1b is radially and circumferentially slipped from an opening 5b of the cooling hole 5 on the other side surface 1c. With this arrangement, a cooling air is induced into the cooling holes 5 and is blown off therefrom by the rotation of the brake disc 1, thereby reliably cooling the brake disc 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake disc with cooling holes that prevents heating of the brake disc and a reduction in braking force.

In the conventional example shown in FIG.
Due to the action of the piston 3 inside, the butts 4 and 4 are used to apply forceful braking from both sides. Therefore, the heat of the brake disc 1 is transferred from the butt 4 and the piston 3 to the brake oil inside the caliper cylinder 2. The brake oil inside became bubbles, causing paper lock and reducing the braking action of the bat, jeopardizing safety.

The present invention has been devised to overcome the difficulty of ridges, by providing a brake disc with a plurality of cooling holes passing through between one side and the other side thereof, and connecting these cooling holes to the axis of rotation of the disc. It is characterized in that the position of the hole on one side is inclined at a predetermined angle of rotation with respect to the hole on the other side.

Next, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, 1a is a rotating shaft.

Even if the brake disc 1 is provided with cooling holes 5 parallel to the rotating shaft 1a, there is a certain degree of air cooling effect, but as shown in FIG.
The cooling holes 5 are appropriately sloped to facilitate blowing. That is, when the rotating shaft 1a rotates as shown by the arrow, an opening is provided at the outer peripheral edge of the left side surface (left side in FIG. 2) lb of the brake disc 1, and the right side IC is inclined toward the rotating shaft 1a. A cooling hole 5 is formed with a hole opening 5b.

As shown in FIG. 3, the cooling hole 5 is formed so that the hole 5a is positioned in the rotation direction of the brake disc 1 by a rotation angle θ relative to the hole 5b.

Such chain holes 5 are provided at appropriate intervals. Also, left side 1b
It is also possible to form cooling holes 5 similar to those described above that are inclined downward from the right side IC toward the right side IC.

These holes 5 may be formed every other hole.

Furthermore, in order to increase the heat dissipation area, a fin member 6 made of aluminum or the like with a corrugated surface on the inner surface is fitted into the cooling hole 5 to increase the heat dissipation area and help prevent the brake disc 1 from overheating. It's Uruchino. Of course, the fins may be integrally formed within the cooling holes 5.

In addition, the size, number, and degree of inclination of the cooling holes 5 are determined as appropriate.
Alternatively, the cooling holes 5 may be inclined with some curve.

According to the present invention, the brake disc 1 is provided with the cooling hole 5 that penetrates from one side to the other side, and the cooling hole 5 is inclined with respect to the rotational axis of the brake disc 1 and with respect to the hole opening 5b of the other side. Since the position of the hole opening 5a on one side is configured to have a predetermined rotation angle θ, air is drawn into the cooling hole 5 when the brake disc 1 rotates, and the air blows through with force. The cooling holes 5 have a large internal area that is exposed to air, which increases the cooling effect.
The amount of heat generated when the pads 4 are frequently tightened can be sufficiently dissipated, and the heating of the brake disc 1 prevents the brake oil from forming bubbles and prevents paper lock, and the braking operation is stable and sufficiently safe. You can maintain your sexuality. In particular, the cooling holes 5 configured as described above are advantageous because even if dirt, dust, etc. enter the holes, they have the function of discharging these obstacles. Furthermore, if fins are provided in the cooling holes 5, the heat dissipation area becomes larger, further increasing the safety of braking.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway explanatory diagram of the braking mechanism of a brake disc, Fig. 2 is a partially cutaway front view of a brake disc with cooling holes according to the present invention, and Fig. 3 is a partially cutaway explanatory view of a brake disc with cooling holes as seen from the left side. FIG. 4 is a side view showing an example, FIG. 4 is a partially cutaway side view showing a state in which the fin member is attached to the cooling hole, and FIG. 5 is a perspective view of the fin member. 1... Brake disc 2... Caliper cylinder 3... Piston 4... Butt 5... Cooling hole 6... Fin member

Claims (3)

[Claims] (1) The brake disc is provided with a plurality of cooling holes that penetrate between one side and the other side, and these cooling holes are inclined with respect to the rotational axis of the disc and relative to the hole opening on the other side. A brake disc with cooling holes, characterized in that the position of the hole on one side has a predetermined rotation angle. (2) A brake disc with cooling holes as set forth in claim (1), wherein a fin member is fitted into the cooling hole. (3) A brake disc with cooling holes as set forth in claim (1), wherein fins are integrally formed within the cooling holes.