KR20180105808A - High reliability and Lightweight Pre-Mounting Brake System for Commercial Vehicles - Google Patents

Abstract

The present invention relates to a brake assembly used for a commercial vehicle capable of increasing cooling performance. The brake assembly includes: a hub portion including a main portion for coupling a bearing housing to which a bearing is mounted so that an axle is inserted and rotated in the bearing housing and a flange portion formed on an outer periphery of the main portion to be coupled with the vehicle; and a disk portion including first and second disks, in which a plurality of ribs are formed between the first and second disks and the first and second disks and the ribs are integrally formed to be coupled with the hub portion. When the hub portion is coupled with the disk portion, coupling protrusions, formed between the first and second disks of the disk portion and protruding inward, are correspondingly coupled to a plurality of coupling grooves formed at the other end of the main portion having the flange portion. A spring gap is provided between the coupling groove and the coupling protrusion and a spring plate is fastened to the spring gap by a bolt.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a high reliability and lightweight pre-mounting brake system for commercial vehicles,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a brake disk for a commercial vehicle, and more particularly to a high reliability lightweight type free-mounting brake device for a commercial vehicle having two springs for each coupling portion of a disk coupled with a hub.

A disc brake device mounted on a vehicle is a device for decelerating or stopping and stopping the vehicle while driving. The disc braking device obtains the braking force by strongly pressing both sides of a disk or a disk rotating together with the wheel or the wheel with the brake pads.

Conventional disc brake devices include discs that rotate with wheels or wheels, brake pads disposed on both sides of the disc, pistons to press the brake pads toward the disc, and calipers that support the pistons and brake pads.

Meanwhile, when the disc brake unit is formed integrally with the disc and the hub, the disc brake unit is made of only nodular graphite cast iron or carbon steel, which increases the weight of the brake unit, thereby increasing vehicle fuel economy and increasing braking distance.

In addition, since the disk and the hub are formed of the same material, the heat is not easily discharged to the outside, which causes surface cracking of the disk due to deterioration.

In particular, in the downhill, when the weight of the vehicle is large, the braking force is reduced, and frequent braking causes not only disk surface crack but also fire.

In addition, when the disc brake unit is integrally formed with the disc and the hub, the disc and the hub are directly coupled to each other, so that thermal stress is concentrated on the coupling unit. Thus, shrinkage and expansion of the coupling unit repeatedly cause thermal deformation, There is a problem in that it may cause an accident of the vehicle due to the breakage of the disk or the weakening of the fastening force.

A problem to be solved by the present invention is to solve the problem of the deformation of the disk by the use of the spring plate to prevent the direct fastening by tightening the spring gaps when the disks are cast or forged and fastened with the hub integrated with the bearing housing, Mounting type brake device for a commercial vehicle, which is capable of improving the cooling performance and lightening the disk and the hub by forming a smooth flow structure of the disk and the hub.

In order to solve the above problems, a brake assembly for use in a commercial vehicle is provided. The brake assembly includes a main portion for engaging a bearing housing to which a bearing is mounted for rotation with an axle inserted therein, and a hub A plurality of ribs are formed between the first and second disks, and the first and second disks and the plurality of ribs are integrally formed to form a disk portion coupled with the hub portion, And a coupling protrusion formed between the first and second discs of the disc portion and protruding inward is formed in a plurality of coupling grooves formed at the other end of the main portion having the flange portion when the hub portion and the disc portion are coupled, Wherein a spring gap is provided between the engaging groove and the engaging projection, and the spring gap That it is possible to provide a light-weight free mounting the brake device and the reliability for commercial vehicles, characterized in that is fastened by a bolt.

At this time, the hub part is formed integrally with the bearing housing, the main part and the flange part. After the bearing housing is inserted into the mold part chamber of the differential pressure casting device, the molten material in the heat insulating furnace, Pressure casting method in which the molten metal is supplied to the mold part chamber by a pressure difference between the mold part chamber and the heat insulating path or a low pressure casting method supplied to the mold part chamber or by putting the molten metal into the mold part chamber, .

The main portion may be formed in a screw shape.

The main portion and the flange portion may be formed of aluminum or an aluminum alloy material, and the bearing housing may be formed of spheroidal graphite cast iron or carbon steel.

The plurality of ribs are formed in a predetermined shape on at least one circumference of the first disk or the second disk, and the engaging protrusions and the plurality of ribs are formed to intersect with each other to form vanes ) Structure.

Further, the plurality of ribs may be formed in at least one of rhombic, diamond, circle, elliptical, triangular, and streamlined shapes.

In addition, the disc portion may be formed of spheroidal graphite cast iron.

Also, the disk portion may be manufactured by a sand casting method or a differential pressure casting method.

In addition, the spring gap and the spring plate may be made of an austenitic stainless steel material.

A high reliability lightweight type free mounting brake device for a commercial vehicle according to an embodiment of the present invention reduces weight by using aluminum or an aluminum alloy for a disk part in which a rotor and a disk are integrated and a part constituting an integral hub, Can be improved. As a result, the braking force of the vehicle can be increased and the fuel consumption can be improved at the same time.

In addition, the high reliability lightweight type free mounting brake apparatus for a commercial vehicle according to the embodiment of the present invention has an effect of reducing the risk of accidents by reducing the damage of the disk by effectively transferring heat during the brake operation.

In addition, the high-reliability lightweight type free-mounting brake apparatus for a commercial vehicle according to the embodiment of the present invention prevents direct engagement due to the spring gap and the spring plate when the disk unit and the hub are fastened, The expansion or twisting of the twist is flexible.

Also, according to the embodiment of the present invention, the highly reliable lightweight type free mounting brake apparatus for a commercial vehicle has an effect that the rotor and the hub are formed in a smooth flow structure to improve the cooling performance.

Further, in the high-reliability lightweight type free-mounting brake apparatus for a commercial vehicle according to the embodiment of the present invention, the SUS steel plate acts as a partition wall and a space between the hub and the disk assembly portion so that the aluminum hub directly receives an impact caused by the braking heat of the disk And the performance of the bearing lubricating oil in the hub can be maintained by cooling the aluminum hub.

1 is a perspective view illustrating a brake device according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view illustrating the disc portion and the hub portion of the brake device shown in FIG.
3 is an exploded perspective view showing the spring gap and the spring plate disassembled from the disc portion shown in FIG.
4 is a cross-sectional view of the disc portion of FIG. 2 taken along line A-A '.
5 (a) to 5 (e) are assembly views sequentially showing the assembling of the brake device of Fig.
Fig. 6 is a cross-sectional view showing a part of the disc portion shown in Figs.
FIG. 7 is an exploded perspective view of the hub portion shown in FIG. 1; FIG.
8 is a cross-sectional view showing the flow direction of air after cutting the brake device shown in Fig.
FIGS. 9 to 11 are views for explaining a manufacturing method of the disk unit and the hub unit shown in FIGS. 1 to 7. FIG.

Hereinafter, the description of the present invention with reference to the drawings is not limited to a specific embodiment, and various transformations can be applied and various embodiments can be made. It is to be understood that the following description covers all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description, the terms first, second, and the like are used to describe various components and are not limited to their own meaning, and are used only for the purpose of distinguishing one component from another component.

Like reference numerals used throughout the specification denote like elements.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms " comprising, "" comprising, "or" having ", and the like are intended to designate the presence of stated features, integers, And should not be construed to preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 11 attached herewith.

FIG. 1 is a perspective view illustrating a braking device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating the disc portion and the hub portion of the braking device shown in FIG. 1, FIG. 4 is a cross-sectional view of the disc portion of FIG. 2 taken along line A-A ', and FIGS. 5 (a) to 5 (e) are cross- Fig. 8 is an assembly view sequentially showing the assembly of the apparatus.

1 to 5, a brake device 10 according to the present invention may include a disc portion 100 and a hub portion 200. In addition, a spring gap 300 and a spring plate 400 may be provided when the disk unit 100 and the hub unit 200 are coupled to each other, thereby making it possible to freely deform the disk.

Specifically, the disc portion 100 can be formed for the brake operation. The disc unit 100 may be coupled to the hub unit 200 to transmit the braking force to the axle. The disc portion 100 is formed in a disc shape and a through portion 105 into which an axle is inserted may be formed at the center.

The disk unit 100 may have a plurality of engaging protrusions 140 for coupling with the hub unit 200 around the penetrating part 105.

In the disk unit 100, the first and second disks 110 and 120 and the plurality of ribs 130 may be integrally formed. At this time, the disk unit 100 may be formed of the same material as the first and second disks 110 and 120 and the plurality of ribs 130. The description of the disk unit 100 will be described again with reference to FIG.

The hub unit 200 is coupled to an axle (not shown) to transmit the power of the vehicle to the wheels. The hub unit 200 may be coupled to the disc unit 100 to transmit the braking force provided by the disc unit 100 to the axle to reduce the speed of the vehicle. Further, the hub unit 200 can reduce noise and vibration during the brake operation.

The hub unit 200 may be integrally formed with a bearing housing 270 for bearing installation so that the axle rotates at the center.

A plurality of coupling grooves 215 may be formed in the hub unit 200 so as to fix the spring gap 300 and the spring plate 400 for coupling with the disc unit 100. A plurality of coupling grooves 215 may be formed to correspond to the engaging protrusions 140.

In the hub unit 200, the main unit 210, the flange unit 230, and the like are formed of different materials from the bearing housing 270 to perform functions such as heat transfer, strength, and vibration absorption.

The description of the hub unit 200 will be made again with reference to FIG.

The brake device 10 according to the present invention may include the spring gap 300 and the spring plate 400 when the disk unit 100 and the hub unit 200 are coupled.

The spring gap 300 may be provided between the engaging protrusions 140 contacting the engaging recesses 215. That is, the spring gap 300 can be inserted between the engaging protrusion 140 and the engaging groove 215 when the engaging protrusion 140 is engaged with the engaging groove 215. At this time, the spring gap 300 may be penetrated so as to be fastened to the engaging protrusion 140, and one side may be cut to form an inner surface corresponding to the outer surface of the engaging protrusion 140. In other words, it can be similar to the 'U' shape.

The spring gap 300 may be formed perpendicular to both ends of one side of the cut surface to support the spring plate 400 and may be formed with a plate support plate 310 facing the inside of the spring gap 300.

As shown in FIG. 4, the spring plate 400 may contact the plate support plate 310 and be fastened by the bolts 350. To this end, the engaging protrusion 140 and the spring plate 400 may respectively form fasteners (not shown) into which the bolts 350 can be inserted.

That is, when the disk unit 100 and the hub unit 200 are fastened, a plurality of coupling protrusions 140 of the hub unit 200 are correspondingly inserted into the plurality of coupling grooves 215 formed in the disk unit 100 The spring gap 300 may be inserted into the coupling groove 215 so that the spring gap 300 may be formed between the coupling groove 215 and the coupling projection 140. The bolt 350 is fastened to the plate support plate 310 formed on the spring gap 300 by fasteners (not shown) formed on the spring plate 400 and the engaging protrusion 140, So that the spring plate 400 can be fastened.

Accordingly, the disk unit 100 can be assembled with the hub unit 200 to improve the assemblability due to the spring gap 300, prevent direct heat transfer to the hub unit 200, So that the disc 100 can be prevented from cracking due to the expansion caused by the heat generated in the disc 100 during braking and the degree of freedom due to the twist deformation.

That is, by mounting the spring gap 300 and the spring plate 400, it is possible to prevent the heat transfer to the hub part 200 easily while assemble easily, and to cope smoothly even if the disk part 100 is inflated and deflected can do. At this time, the degree of freedom can be applied to a deformation of less than 1.0 mm, and the pressing of the spring plate 400 can be performed up to 0.5 mm, but this is not limitative.

5 (a) to 5 (e), the disk unit 100 is inserted into the main unit 210 of the hub unit 200, The assembly can be carried out by rotating it to correspond to the coupling groove 215 and pulling it toward the coupling groove 215. After the assembly, the brake device 10 can be completed by fastening the spring gap 300 and the spring plate 400, respectively.

Meanwhile, the spring gap 300 and the spring plate 400 may be formed of an austenitic stainless steel material, and preferably a SUS 304 material. Further, it is preferable that the bolt 350 is formed of a material such as SCM435 which is light in weight and has high hardness.

Fig. 6 is a cross-sectional view showing a part of the disc portion shown in Figs.

The disk unit 100 may include a first disk 110, a second disk 120, and a plurality of ribs 130.

Specifically, the first disk 110 and the second disk 120 may be brought into close contact with a brake pad (not shown) to generate a braking force.

A plurality of ribs 130 including a coupling protrusion 140 may be formed between the first and second disks 110 and 120 to couple with the hub 200. That is, the first disk 110, the second disk 120, the plurality of ribs 130, and the engaging protrusions 140 are integrally formed with each other, and the engaging protrusions 140 are formed on the inner side of the disk 100, And may protrude toward the penetrating portion 105 side.

The penetrating portion 105 may be formed at the center of the disc portion 100 so that the axle is mounted. That is, the engaging protrusion 140 is formed along the periphery of the penetrating portion 105.

The plurality of ribs 130 may be formed in a predetermined shape on at least one circumference of one surface of the first disk 110 or the second disk 120. Referring to FIG. 6, for example, the plurality of ribs 130 may be formed on three circumferences, and the shapes of the ribs formed on the circumferences may be uniform. However, this is an example, and the plurality of ribs 130 may be formed on one or two circumferences, or may be formed on three or more circumferences.

In addition, each of the plurality of ribs 130 and the engaging protrusion 140 may be formed to intersect with each other. That is, one surface of the first disk 110 or the second disk 120 may have a vane structure in which a plurality of ribs 130 and the engaging protrusions 140 are protruded to form an exhaust passage.

Accordingly, the heat generated from the first and second disks can be effectively discharged to improve the cooling performance.

Meanwhile, the plurality of ribs 130 may be formed of at least one of rhombic, diamond, circle, elliptical, triangular, and streamlined shapes. For example, as shown in FIG. 6, ribs 130 formed on three circumferences are described. Ribs in the shape of a rhombus are formed on one circumference and ribs in the shape of a triangle are formed on another two circumferences . Further, the three circumferential phases can be formed into ribs of diamonds, triangles, and diamond-like shapes, respectively. As described above, the plurality of ribs 130 can be formed by alternately selecting one or more of rhombus, diamond, circle, ellipse, triangle, and streamlined shapes.

Meanwhile, it is preferable that the ribs 130 are formed in a rhombus or diamond shape to improve the casting composition during casting.

Meanwhile, the first disk 110 and the second disk 120 may be manufactured by a sand casting method or a differential pressure casting method. At this time, a plurality of ribs 130 and engaging protrusions 140 may be formed at the same time.

The first and second disks 120 and the plurality of ribs 130 and the engaging protrusions 140 are formed of the same material as described above. The material of the first and second disks 120 and 120 is made of a material such as FC210D, FC250D or carbon steel Can be used.

FIG. 7 is an exploded perspective view of the hub portion shown in FIG. 1; FIG.

As shown in Fig. 7, the hub portion 200 supports an axle (not shown) and can be fixed to the vehicle body. For this purpose, the hub unit 200 may include an axle insertion hole 280 formed to penetrate the center of the hub 200 so as to support and rotate the axle (not shown).

The hub unit 200 may include the main unit 210, the flange unit 230, and the bearing housing 270 integrally.

The main portion 210 may have a housing insertion hole 250 through which the bearing housing 270 can be attached. In addition, the main portion 210 may be formed with a coupling groove 215 as described above so that the disc portion 100 can be coupled. At this time, the coupling groove 215 may be formed in the periphery of the housing insertion hole 250.

The flange portion 230 may be formed with a plurality of fastening portions 240 to be coupled to the vehicle. A stud bolt 245 can be fastened to the fastening portion 240 and the brake device 10 of the present invention can be engaged with the vehicle by the stud bolt 245. [ At this time, the stud bolt 245 may be formed of a material such as SCM435 which is light in weight and hard in hardness.

Meanwhile, the bearing housing 270 may be coupled to the housing insertion hole 250 formed in the main portion 210. The bearing housing 270 is formed with an axle insertion hole 280 through which a center passes, and a bearing for rotating the axle can be formed therein.

The hub unit 200 may be integrally formed through a casting forging method or a differential pressure casting method after the bearing housing 270 is manufactured through a die casting method or the like and inserted into a hub metal mold.

At this time, a plurality of fixing grooves 275 may be formed on the outer circumferential surface of the bearing housing 270 so as not to be missed in the main portion 210. 7, the fixing groove 275 may be formed to have a predetermined length in the longitudinal direction of the bearing housing 270. Accordingly, when the bearing mounted on the bearing housing 270 generates heat due to the rotation of the axle, it is possible to prevent the bearing shatter due to the difference in thermal expansion coefficient between the bearing and the main portion 210.

At this time, a fixing protrusion 255 corresponding to the fixing groove 275 may be formed on the outer circumferential surface of the housing insertion hole 250 of the main part 210. Accordingly, the fixing protrusion 255 is coupled to the fixing groove 275 so that the bearing housing 270 is fixed to the main portion 210.

The method of manufacturing the hub unit 200 will be described with reference to FIGS. 9 to 11. FIG.

Meanwhile, the hub unit 200 may be formed of AL356 material.

AL356 is composed of the composition shown in Table 1 below.

Element % Present Si 6.5-7.8 Fe 0.19 or less Cu 0.05 or less Mn 0.1 or less Mg 0.35 to 0.55 Zn 0.07 Ti 0.08-0.25 Pb 0.03 or less Al Balance

In addition, A356 has physical properties as shown in Table 2.

Property Value Density 2680 kg / m ³ Melting Point 555 ° C Modulus of Elasticity 70 GPa Electrical Resistivity 0.038x10 ^-6 ohm.m Thermal Conductivity 180 W / m.K Thermal Expansion 24x10 ^-6 / K Yield Strength More than 220 Mpa Ultimate Strength More than 290 Mpa

As shown in Table 2, AL356 has excellent mechanical strength and excellent heat resistance and thermal conductivity.

Accordingly, the hub unit 200 according to the embodiment of the present invention absorbs heat generated from the bearing housing or the disk unit 100 and can easily discharge the heat to the outside. In addition, the weight is less than that of other metals, which has the advantage of reducing fuel consumption and braking distance.

Meanwhile, the shape of the main part 210 may be formed of a screw so that the hub part 200 can more easily discharge heat.

Referring to FIG. 8, which is a cross-sectional view illustrating the flow direction of air after cutting the braking device shown in FIG. 1, a hub unit (not shown) made of AL356 material, which is different from the disc unit 100 formed of the spheroidal graphite cast iron, The heat of the disk unit 100 can be easily absorbed by the heat exchanger 200 and the absorbed heat can smoothly flow the air due to the screw shape and can be easily discharged to the outside. Since the disc 100 has a plurality of vanes formed between the first disc 110 and the second disc 120, the disc 100 can be easily discharged, thereby significantly improving the cooling performance.

When the disc 100 and the hub 200 are fastened together, the spring gap 300 improves the assemblability and prevents direct heat transfer between the disc 100 and the hub 200, The plate 400 is free from deformation of the disk unit 100, thereby preventing the disk unit 100 from being cracked.

FIGS. 9 to 11 are views for explaining a manufacturing method of the disk unit and the hub unit shown in FIGS. 1 to 7. FIG.

In the differential pressure casting apparatus, a metal mold chamber 600 is provided at an upper portion and a warming furnace 500 may be installed at a lower portion thereof. The warming furnace 500 is a melt in which the material to be used for casting is melted. The differential pressure casting apparatus can be used for a method in which molten material is supplied to the mold section chamber 600 and cast by the pressure difference between the mold section chamber 600 and the warming furnace 500. [

The bearing housing 270 manufactured in advance in the differential pressure casting apparatus shown in FIG. 9 can be fixed to the mold part chamber 600 provided with the hub metal mold. Subsequently, the metal mold chamber 600 of the differential pressure casting apparatus and the warming furnace 500 are pressurized to have the same pressure. At this time, the inner pressure of the metal mold chamber 600 and the warming furnace 500 is maintained at 2.0 [bar]. Further, the AL 356 described above in which the molten material described above is inherent in the warming furnace 500.

Then, as shown in FIG. 10, the pressure of the mold part chamber 600 can be raised to 2.5 [bar]. Accordingly, the AL 356 melted in the heat insulating furnace 500 can be supplied to the mold part chamber 600 by the pressure difference between the mold part chamber 600 and the warming furnace 500.

As described above, when the molten AL356 flows into the mold of the mold part 600 due to a high pressure in the mold part chamber 600, the generation of bubbles is remarkably reduced as compared with the general casting method. In addition, since the physical property deviation is small, the hub portion 200 can have uniform physical properties.

11, after the AL 356 is completely solidified in the mold part chamber 600, the mold part chamber 600 is separated and the hub part 200 is taken out.

The integral hub can be manufactured in a manner different from that of Figs.

For example, the hub unit 200 can be manufactured using the molten metal forging method. First, a description will be given of a device used in the molten metal forging method. The molten metal forging apparatus may be provided with a mold part chamber at the lower part and a warming furnace at the upper part thereof.

First, a bearing housing is mounted on a mold for forming a hub in a mold section chamber. Thereafter, the molten AL356 is supplied to the mold section chamber at a pressure of about 180 [bar]. Through this, the bubbles contained in the AL356 material supplied in the mold can be completely removed, and an integral hub can be manufactured.

The integrated hub manufactured through the above-described process has little variation in physical properties due to removal of bubbles therein.

Meanwhile, the disc portion 100 of the braking device 10 according to the embodiment of the present invention can also be manufactured using the method shown in Figs. 9 to 11.

That is, as shown in FIG. 9, the first and second disks 110 and 120 previously manufactured and coupled to the differential pressure casting apparatus are fixed to the mold section chamber 600. Subsequently, the metal mold chamber 600 of the differential pressure casting apparatus and the warming furnace 500 are pressurized to have the same pressure. At this time, the inner pressure of the metal mold chamber 600 and the warming furnace 500 is maintained at 2.0 [bar]. In the warming furnace 500, a material in which the spheroidal graphite cast iron is melted is contained.

Then, the pressure of the mold section chamber 600 is raised to 2.5 [bar] as shown in FIG. The spheroidal graphite cast iron melted in the heat insulating furnace 500 is supplied to the mold part chamber 600 by a pressure difference between the mold part chamber 600 and the warming furnace 500. At this time, the molten spheroidal graphite cast iron is supplied to the mold part chamber 600 between the first and second disks 110 and 120.

As described above, when the molten spheroidal graphite cast iron flows into the mold of the mold cavity 600 due to a high pressure in the mold cavity 600, the generation of bubbles is remarkably reduced as compared with the conventional casting process. In addition, since the physical property variation is small and the disk unit 100 has uniform physical properties, the heat generated during the brake operation or the axle rotation can be uniformly transmitted to the entire disk unit 100.

11, after the spheroidal graphite cast iron is completely solidified in the mold cavity 600, the mold cavity 600 is separated and the integral disc cavity 100 is taken out.

In addition, the disc portion 100 may be manufactured by a sand casting method. This is the most common casting method to be carried out using die casting, which is a casting method commonly known to those skilled in the art, and a detailed description thereof will be omitted.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.

10: Brake device
100: disk portion
105:
110: first disk
120: second disk
130: rib
140: engaging projection
200: hub part
210: main part
215: engaging groove
230: flange section
240: fastening portion
245: Stud bolt
250: housing insertion hole
255: Fixing projection
270: Bearing housing
275: Fixing groove
280: Axle insertion hole
300: spring gap
310: Plate support plate
350: Bolt
400: spring plate
500: Insulation furnace
600: mold chamber

Claims (9)

1. A brake assembly for use in a commercial vehicle,
A hub portion formed of a main portion for engaging a bearing housing to which the bearing is mounted so that the axle is inserted and rotated, and a flange portion formed on an outer periphery of the main portion to be engaged with the vehicle,
And a disc portion formed of first and second discs, wherein a plurality of ribs are formed between the first and second discs, and the first and second discs and the plurality of ribs are integrally formed and coupled with the hub portion, ,
Upon engagement of the hub portion and the disk portion,
The coupling protrusions formed between the first and second discs of the disc portion and projecting inward are correspondingly coupled to the plurality of coupling grooves formed at the other end of the main portion having the flange portion,
Wherein a spring gap is provided between the engaging groove and the engaging projection, and a spring plate is fastened to the spring gap by a bolt.
The method according to claim 1,
The hub unit includes:
Wherein the bearing housing, the main portion and the flange portion are integrally formed,
After the bearing housing is inserted into the mold section chamber of the differential pressure casting apparatus, the molten material in the insulated furnace provided under the mold section chamber is supplied to the mold section chamber by a pressure difference between the mold section chamber and the insulated furnace Pressure casting system, or a low-pressure casting system supplied to the mold unit chamber or a mold unit chamber, and a pressure of 100 tons or more (forging).
The method according to claim 1,
The main part,
Wherein the guide member is formed in a screw shape.
The method according to claim 1,
Wherein the main portion and the flange portion comprise:
Wherein the bearing housing is formed of aluminum or an aluminum alloy material, and the bearing housing is formed of spheroidal graphite cast iron or carbon steel.
The method according to claim 1,
The plurality of ribs
Wherein the engaging projection and each of the plurality of ribs are formed to intersect with each other to form an exhaust flow path. High reliability lightweight type free mounting brake device for commercial vehicle.
6. The method of claim 5,
The plurality of ribs
Diamond, circle, ellipse, triangle, streamlined shape, and the like.
The method according to claim 1,
And the disc portion is formed of spheroidal graphite cast iron.
The method according to claim 1,
Wherein the disc portion is manufactured by a sand casting method or a differential pressure casting method.
The method according to claim 1,
Wherein the spring gap and the spring plate are made of an austenitic stainless steel material.

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