KR100307977B1 - Brake disc and Process for producing of the same - Google Patents

Abstract

The brake disc is provided with a friction ring 4 and a bearing member 1, and is coupled to the friction ring 4 by a pin 3 as a connecting element, the connecting element being a pin, a bolt 3 or the like. And arranged along the peripheral wall of the bearing member 1 and projecting into the recess (bore ball) on the peripheral wall 7 of the friction ring 4 and coupling the bearing to the bearing member 1. And a brake disc such that the bearing member is such as a pot, wheel hub (17) or wheel rim.

Description

Brake discs and process for producing same

[Brief Description of Drawings]

1 is a cross-sectional view taken along the line I-I of FIG.

FIG. 2 is a partial plan view of the brake disc viewed from the arrow direction A of FIG.

FIG. 3 is a cross-sectional view taken along line III-III of FIG. 4 to show different designs of brake discs.

4 is a partial plan view in the direction of arrow B of FIG.

5 is a cross-sectional view similar to each other according to FIGS. 1 and 3 as brake discs of different types;

6 is a cross-sectional view of a wheel hub having a brake disc according to the present invention.

7 is a plan view of the clamping claw

8 is a front view of the clamping clutch

Key sign:

1. Pot 2. Outer wall 3. Pin 4. Friction ring 5, 16. Web

6. Large thickness part 7, 13. Peripheral wall 8. Bore hole 10. Wavy bead

15. Clamping Clutch 17. Wheel Hub

Detailed description of the invention

FIELD OF THE INVENTION AND THE INVENTION

The invention relates to a brake disc, for example a brake for a vehicle, having a friction ring and a bearing part connected to the friction ring by means of a connection element such as a pin. disc) and its manufacturing method.

In manufacturing the brake disc, the brake disc member is divided into two types of bank account. That is, a friction ring usually made of gray cast iron and a steel or aluminum pot serving as a bearing part for the friction ring.

The friction ring and the pot are joined to each other by, for example, screws or the like, which in the case of a ventilated brake disc are joined by half of the friction ring.

However, a drawback on this type of brake disc is that corrosion occurs between gray cast iron and steel or light metal, especially when contacted with salt water by screws or in winter, for example.

In addition, when different temperature expansions occur between the friction ring and the pot, defects such as rupture and cracking become more prominent. If a unilateral tightening or fastening between the friction ring and the pot, a so-called "dishing", occurs, the friction ring will warp. In addition, when the friction ring is placed at a high temperature, a change in dimensions usually occurs within the range of mm or less.

The technical problem to be solved by the invention

Accordingly, an object of the present invention is to provide an improved brake disc and a method of manufacturing the same, by eliminating the above-mentioned drawbacks of the prior art and minimizing the above-mentioned problems of the friction ring during use.

Composition of the Invention

In the present invention, a plurality of connecting elements such as pins and bolts contribute to the above-described object, and these connecting elements such as pins and bolts are arranged in the circumference of the bearing part and connected to the bearing member. It projects into a recess in the peripheral wall of the friction ring.

In the one-sided comection area between the friction ring and the bearing member such as the pot, the central connection at the center axis of the friction ring is made by pins or bolts, so-called dishing of the friction ring while driving. This phenomenon is prevented.

One of the advantages of the brake disc of the present invention is that the friction ring is greatly expandable without any difficulty even at high temperatures generated during driving.

On the other hand, if the pin is made of a very high quality material, such as stainless steel, the corrosion problem can be solved by the internal material.

By the way, this pin is generally designed to radially project out of the peripheral wall of the bearing member and to be inserted into bores in the inner circumferential wall of the friction ring, which are located in the long central longitudinal axis of the friction ring and The pin is designed to be slightly movable with respect to these bore holes.

According to the above-described design, the friction ring becomes expandable during driving in the mm range without any tension or warping.

A slight motion, ie slight play, corresponding to this purpose occurs between the pin and the periphery of the bore ball and at the same time the depth of the bore ball is greater than the length of the pin in the area where the pin protrudes into the bore ball. And mm deeper.

However, it is not necessary to lay out the borehole deeply in every way.

This is because the friction ring will usually expand more strongly outwardly. The present invention can be realized by reducing the corresponding material so as to bring weight reduction in the design of the brake disc, for example, by having a connection between the friction ring and the pot by pins, and by using the pot as a bearing member as a light metal or plastic.

Indeed, when the friction ring is connected or assembled according to the present invention, the friction ring is assembled to swing "floatingly" by allowing the bearing member and the friction ring to have mutual mobility between the bearing member and the friction ring. Expandable without difficulty even under temperature. The centric suspension of the friction ring is always guaranteed to be so flowable.

In the present invention, it is also possible to prevent the occurrence of indexing errors inevitably in the case of screw connection by means of a connection between the bearing portion by the pin and the friction ring. That is, in the present invention, it is possible to connect the correct casting and the correct dimension. This is particularly the case, for example, when casting a pin into a bearing member when the bearing member is arranged in a pot. For this purpose, if the pot is made from a castable light metal, in particular aluminum, it is therefore required that the pin also be cast from the same material. .

Instead of aluminum pot design, pots are also designed in steel or cast iron, if necessary. The cast iron is made of gray cast iron, which is light in weight. In the case of steel pots, the bolts are fixedly connected to the pot in different ways. For example, connection fixation by welding on the outer circumference of the pot. Of course, connection by bonding is also possible.

Fins are made of high quality steel, especially stainless steel.

Pots are made of relatively thin materials to make pots as light as possible. Pots may also impart wave-shaped beads to their radial parts, for example to ensure stability and strength.

In designing the breathable or ventilated brake disc of the present invention, the two friction ring members are designed to be joined to each other by a web, and bores are introduced into the web to be formed.

The borehole design advantage here lies in every second web given a corresponding thickness.

In this type of design, the through-flow of the double-sided friction ring, and thus the better cooling effect, is achieved with the help of pin fastening or pin suspension, which is called air intake. This is because a better cooling effect is secured.

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

1 and 2 show a brake disc of the present invention. Here, reference numeral 1 is a pot as a bearing member, and is fastened on a hub of a wheel (not shown) by a known method. In addition, the pin 3 is provided in the outer peripheral wall 2 of this pot 1, and is connected to the friction ring 4 which consists of two half parts 4A and 4B. The friction rings 4 are joined to each other by a plurality of webs 5 arranged on the outer circumference thereof. In this manner, the brake disc of the present invention having air permeability is obtained.

The second web of the webs 5 is all formed in the inner circumferential region between the thickenings 6. In this 6, the pin 3 protrudes from the peripheral wall 7 of the friction type 4 toward the bore hole 8 located at the central longitudinal axis 12 of the friction ring 4. The length of this pin 3 is determined by selecting it short enough that the depth of the bore hole 8 is only about 1 to 3 m. In the radial direction between the borehole 8 and the pin 3, the pin 3 should be chosen to be slightly movable with minor play towards the borehole 8.

The friction ring 4 is thus "floatingly" on pot 1.

As a result, this fluctuation causes the friction ring 4 to expand radially due to the excessive length or depth of the borehole 8 without the risk of rupture as the corresponding temperature increases. The pot 1 is usually made of aluminum, 3 may be cast into the pot 1 during manufacture for a positive connection between pin 3 and pot 1.

Typically, pot 1 is cast, forged, extruded, deep drawn, or otherwise fabricated and installed.

Also shown in FIGS. 3 and 4 are brake discs. Here, for example, pot 1 is made of iron with a very thin wall, and in order to obtain stability and required strength, pot 1 can be provided together with wave-shaped beads 10 at a radius. The circumferential region 11 of pot 1 is also provided with wave-shaped beads to ensure stability and strength (see FIG. 4).

As shown in FIGS. 3 and 4, the pin 3 may in this case be joined by welding or bonding to the periphery 11 of the pot 1. The other brake disc configuration is the same as that of the design design as described in FIGS. 1 and 2.

The above described brake discs are particularly suitable for disc brakes in vehicles. Typically, it is also used for a similar purpose connected to the inner body and the annular body surrounding it, which is adapted to high temperatures and thus to be expandable.

In general, a vehicle disc brake is such that the brake disc is enclosed on an outer circumference by brake shoes or brake calipers as shown in FIGS. 1 to 4.

As an example, in Fig. 5, a design for a brake disc is shown. Here the pot is in the form of a brake disc carrier and embraces the friction ring from the outside, and the brake shoe or brake caliper embraces the brake ring from the inner circumference of the latter. Brake disk devices of this kind are disclosed, for example, in European Patent Application No. 0 241 767, which connects the pot or brake disk carrier to the friction ring or brake ring by means of claw-like webs such as a claw. Since the connection is very complicated and expensive, pin 3 is used for this purpose instead. In this case the pin 3 is installed in the borehole 8, where the pin is guided and inserted from the peripheral wall 13 of the friction ring into the web 5.

The pin may be joined to the pot 1 by, for example, welding. In addition, relative motion between the pin 3 and the friction ring 4 is also possible, contributing to the free expansion of the friction ring.

In the third embodiment, the wheel hub 17 of the vehicle is also arranged as one of the bearing members. Fastening pin 3 on this wheel hub 17 is possible by means of a clamping claw 15 or a clamping jaw, ie fastening claw means.

The detailed state is shown in FIG. 7 and FIG. The clamping clutch 15 is screwed into a web 16 enclosed by the wheel hub 17, which web 16 is configured to radially widen the wheel hub 17. Pin 3 is thus fastened between the web 16 and the clamping clamp 15, which is a tight jaw.

Effects of the Invention

As can be seen from the embodiments of the present invention, the thermal energy generated during the braking operation in the present invention is not transmitted to the vehicle axle in a large area, but rather from the wheel disc from the brake disc due to the pin connection. As the entire furnace heat is transferred, only a relatively small amount of generated heat energy is converted to the wheel hubs, while most of the heat remains on the brake discs, allowing for free expansion.

Instead of the wheel hubs described above, the brake discs also allow direct connection to the wheel rims. In the case of this wheel rim fastening, the connection as described in FIG. 5 is possible. That is, the friction ring is embraced from the outside, and the brake shoe or the brake caliper also embraces the brake disc carrier from the inner circumference of the brake ring and becomes accessible.

The two connections to the wheel hub and wheel rim also allow for relative motion between the pin 3 and the friction ring 4 and free expansion in the latter case as well.

Claims (11)

In the brake disc having a friction ring and a bearing part connected to the friction ring by connecting elements, The plurality of connecting elements may be pin 3, bolts or the like arranged above the periphery of the bearing members 1, 17 and also connected to the bearing members 1, 17, and also with the friction ring 4. Protrudes into recesses in the peripheral wall 7), and is configured to be breathable, The pin 3 is radially projected out of the peripheral walls of the bearing members 1, 17 and is inserted into a bore hole 8 having a peripheral wall 7 of the friction ring 4. A brake disc, characterized in that it is located at the central longitudinal axis of the friction ring 4 so that the pin 3 is movable relative to the bore hole 8. 2. Brake disc according to claim 1, characterized in that the pin (3) is installed so as to be movable in the bore hole (8). 2. Brake disc according to claim 1, characterized in that the bore hole (8) is deeper than the length of the pin (3) protruding from the friction ring (4) into the bore hole. 4. Brake disc according to any of the preceding claims, characterized in that the pin (3) is welded onto the bearing member (1, 17). 2. Brake disc according to claim 1, characterized in that the pin (3) is connected to the wheel hub (17) by a clamping clutch (15). 6. Brake disc according to claim 5, characterized in that the pin (3) is located between the clamping clutch (15) and the web (16). 2. The two friction ring halves (4A, 4B) according to claim 1, wherein the two friction ring halves (4A, 4B) are joined by a web (5), in which the pin (3) is bored (8). ) Is a brake disc, characterized in that it is guided from the peripheral wall (7). 8. Brake discs according to claim 7, characterized in that every second web (5) has a large thickness portion (6) into which the bore hole (8) is guided for each pin (3) example. 2. The brake disc according to claim 1, wherein the bore hole (8) is formed on the inner circumferential wall of the friction ring (4). 8. The bore hole (8) according to any one of claims 1, 3 and 7, in the case of a brake disc in which the bearing members (1, 17) enclose a brake ring from the outside. Brake disc, characterized in that located on the peripheral wall (13) of the friction ring (4). In order to manufacture the brake discs according to claims 1 to 10, in the first step, the friction ring 4 has a bore hole 8, and the pin 3 is in this bore hole 8 Process for producing a brake disc, characterized in that the pot (1) is inserted into the cast (3).