KR950006998B1 - Disc-brake strengthened - Google Patents

Abstract

The structure of the disc brake for offering reinforced braking ability, has the opposite-piston type disc brake having a disc rotating with the wheel on the wheel hub and calipers having two inner cylinders and hydraulic pistons positioned at respective opposite sites. The disk brake comprises a ring-shape pad (10) attached on both corners of the disc (1); two calipers (2) mounted at the respective opposite sites; a ring-shape plate (11), for compressing the ring-shape pad (10) of the disc (1), combined with the piston (26).

Description

Disc brake with enhanced braking force

1 is a perspective view of a conventional disc brake.

Figure 2a is an operating principle of the conventional counter piston type disc brake.

Figure 2b is a working principle of a conventional floating caliper disc brake.

3 is a perspective view of the disc brake of the present invention.

4 is an exploded perspective view of the disc brake of the present invention.

Figure 5a is an operating principle of the opposing piston-type disk brake of the present invention.

5B is an operating principle of the floating caliper disc brake of the present invention.

* Explanation of symbols for main parts of the drawings

1: disc 2: caliper

2a: cylinder 2b: piston

2c: Pad 2d: Piston seal

10: annular pad 10a: groove

11: round plate

[Field of Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake, which is an automobile braking device, and more particularly, to a disc brake having an improved structure to enhance braking force.

[Background of invention]

There are many kinds of automobile braking devices, among which are disc brakes installed on a wheel hub and configured to brake by pushing hydraulic brake pads on both sides by means of hydraulic pressure on a disk rotating with wheels.

In the conventional disc brake, as shown in FIG. 1, a disc 1 is provided in a wheel hub, and a caliper 2 in which a piston is built-in is installed around the disc 1. The braking principle of the disc brake is as follows.

The disc brake has an opposing piston type and a floating caliper type. The opposing piston type disc brake has a piston 2b which receives hydraulic pressure from both opposing cylinders 2a in the caliper 2, as shown in FIG. The pad 2c is moved in the direction of the arrow to compress the disk 1 from both sides to brake it.

When the hydraulic pressure of the cylinder 2a is removed, the piston 2b is returned to its original position by the force generated by the elastic deformation of the piston seal 2d, that is, the force to return to the circular shape, so that the braking state is released. .

As shown in FIG. 2B, the floating caliper disc brake has the piston 2b and the caliper 2 opposite to each other, that is, when the piston 2b receives hydraulic pressure in one cylinder 2a in the caliper 2, It moves in the direction indicated by the arrow to cause the pad 2c to press the disk 1 on both sides and brake it.

When the hydraulic pressure of the cylinder 2a is removed, the braking state is released because the piston 2b and the caliper 2 are returned to their original positions by a force to return to the circular shape of the piston seal 2d as in the case of the opposite piston type. .

On the other hand, due to the recent surge in automobiles, the distance between cars becomes narrower without the driver's own knowledge, and collision accidents occur frequently. Therefore, in recent years, the braking distance of automobiles has to be made shorter than the braking distance by the conventional disc brake.

As is known, in order to increase the braking force of the disc brake, the friction force between the rotating member and the braking member must be increased and the heat generating member must be cooled quickly. In the conventional disc brake, the contact area between the rotating member and the braking member is relatively narrow, so that the frictional force is reduced. It is not very high, and the heat dissipation surface area of the disk, which is a member that generates heat, is relatively small, which causes a problem of not being cooled quickly.

[Purpose of invention]

The present invention has been made in order to shorten the braking distance of a vehicle than in the prior art, and an object thereof is to provide an improved disc brake to enhance braking force.

[Summary of invention]

In order to achieve the above object, the disc brake of the present invention has annular pads attached to both side edge portions of the disc rotating together with the wheels, and two calipers are installed at opposite positions around the disc, and opposite pistons are provided. In the case of the disc brake, the annular plates for pressing the annular pads of the disc are respectively coupled to the front end of the piston facing the caliper. In the case of the floating caliper disc brake, the annular plate is coupled to the front end of the piston on one side. The annular plate is directly coupled to the caliper on the opposite side.

[Description of Specific Embodiment of the Invention]

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Disc brake of the present invention, as shown in FIGS. 3, 4, 5a and 5b, is installed in the wheel hub and rotates with the wheels, respectively, the annular pads 10 at the edges of both sides, respectively. Disk (1) to which the gears are attached, and two are installed at mutually opposite positions around the disk (1) to brake the disk (1), and a cylinder (2a) and a piston (2b) operated by hydraulic pressure are configured therein. It is composed of a caliper (2), and a circular plate (11) for pressing the annular pad (10) of the disk (1), which is coupled to the tip of the piston (2b) or inside the caliper (2).

When the disc brake is of opposite piston type, since the two cylinders 2a and the piston 2b are formed opposite to each other in the caliper 2, the annular plate 11 at the tip of each piston 2b as shown in FIG. Is coupled, but in the case of a floating caliper type, one cylinder 2a and a piston 2b are formed at one side of each caliper 2, so that the annular plate 11 is formed at the tip of the piston 2b on one side as shown in FIG. ) Is coupled, and the annular plate 11 is directly coupled to the caliper 2 on the opposite side to move together with the caliper 2.

The outer surface of each annular pad 10 attached to both sides of the disk 1 has a rotational direction of the annular pad 10 as shown in FIG. 4 to increase the frictional force upon contact with the annular plate 11. An arrow-shaped groove 10a is formed.

The outer surface of the annular plate 11, that is, the surface that is not in contact with the annular pad 10, is formed as an uneven surface to increase the heat dissipation efficiency, as shown in FIG.

The disc brake of the present invention configured as described above acts as follows.

First, the case where the disc brake is of opposite piston type will be described with reference to FIG. 5A.

The disc 1 and the annular pad 10 rotate together with the wheel hub and the wheel when the vehicle is driven. When the driver presses the brake pedal, the hydraulic pressure acts simultaneously on two opposed cylinders 2a of each caliper 2. do. When the hydraulic pressure acts on the cylinder 2a, the piston 2b and the annular plate 11 move toward the annular pad 10 so that the annular plate 11 contacts the annular pad 10 so that the annular plate 11 and the annular pad The rotation of the annular pad 10 and the disk 1 is stopped by the frictional force of (10). In other words, the car is braked.

Next, a case where the disc brake is a floating caliper will be described with reference to FIG. 5B.

When the driver presses the brake pedal while the vehicle is running, hydraulic pressure acts on the cylinders 2a of the respective calipers 2. When hydraulic pressure acts on the cylinder 2a, the piston 2b and the annular plate 11 coupled to the tip of the piston 2b move toward the rotating annular pad 10 and at the same time the caliper 2 and the caliper 2 inside. Opposite annular plate 11 coupled directly to the annular pad 10 is also moved so that two annular plates 11 compress the annular pad 10 and the disk 1. Therefore, the rotation of the annular pad 10 and the disk 1 is stopped and the vehicle is braked.

The disc brake of the present invention has two calipers (2), and the annular pad (10) attached to the edge of the disc (1) is annular and the annular plate (11) in contact with the annular pad (10) is about the same size. Since the contact area for braking is considerably wider than the contact area of the prior art, an arrow-shaped groove 10a in the direction of rotation is formed on the friction surface of the annular pad 10, so that the annular plate 11 and The coefficient of friction between the annular pads 10 is much higher than in the prior art. Therefore, the frictional force for stopping the disk 11 which does not rotate is much larger than the conventional one.

In addition, heat is generated a lot in the annular plate 11, since the annular plate 11 is composed of two, the heat dissipation area is doubled than in the case of the prior art in which the disk receives heat, and the outside of the annular plate 11 Since the surface is formed of an uneven surface, the heat dissipation area is further increased. Therefore, the heat dissipation efficiency is greatly increased so that the annular plate 11 is not subjected to large heat.

As described above, the disc brake of the present invention greatly increases the frictional force between the disk 1 and the annular pad 10 as the rotating member and the annular plate 11 as the braking member, and the heat radiation efficiency of the annular plate 11 subjected to heat is increased. Since it is very high, the braking force is much higher than that of the prior art. Therefore, the vehicle equipped with the disc brake of the present invention has a very short braking distance, and it is possible to avoid an accident even if the inter-vehicle distance is short while driving.

Claims (6)

On the opposite piston type disc brake consisting of a disc installed on the wheel hub and rotating with the wheel, and a caliper which is arranged around the disc and two pistons which are actuated by the cylinder and the hydraulic pressure inside each other are opposed to each other. An annular pad 10 is attached to both side edges of the disk 1, and two calipers 2 are provided at opposite positions around the disk 1, and the caliper 2 An opposite piston-type disc brake, characterized in that the annular plate (11) for pressing the annular pad (10) of the disc (1) is coupled to the front end of the opposing piston (2b), respectively. According to claim 1, The outer surface of the annular pad 10 is formed with an arrow-shaped groove (10a) in the direction of rotation of the annular pad 10 to increase the friction force in contact with the annular plate (11) An opposite piston type disc brake, characterized in that there is. The opposite piston-type disc brake according to claim 1, wherein the outer surface of the annular plate (11) is formed with an uneven surface to increase heat dissipation efficiency. In a floating caliper type disc brake comprising a disc installed on a wheel hub and rotating with a wheel, and a caliper provided on a periphery of the disc and having a cylinder and hydraulically actuated piston on one side thereof, the disc (1) Annular pads 10 are attached to both side edge portions of the annular pads, and two calipers 2 are provided at opposite positions around the disk 1, and the annular plate 11 is formed at the tip of the piston 2b on one side. Floating caliper disc brake, characterized in that is coupled, the annular plate 11 is directly coupled to the caliper (2) on the opposite side opposite. 5. The groove 10a is formed in the outer surface of the annular pad 10 in the direction of rotation of the annular pad 10 in order to increase the frictional force in contact with the annular plate 11. Floating caliper type disc brake, characterized in that. 5. The floating caliper disc brake according to claim 4, wherein the outer surface of the annular plate (11) is formed with an uneven surface to increase heat dissipation efficiency.