KR20170041546A - Brake disc assembly using different materials - Google Patents

Brake disc assembly using different materials Download PDF

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Publication number
KR20170041546A
KR20170041546A KR1020150141120A KR20150141120A KR20170041546A KR 20170041546 A KR20170041546 A KR 20170041546A KR 1020150141120 A KR1020150141120 A KR 1020150141120A KR 20150141120 A KR20150141120 A KR 20150141120A KR 20170041546 A KR20170041546 A KR 20170041546A
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KR
South Korea
Prior art keywords
hub
ring member
along
circumferential surface
brake
Prior art date
Application number
KR1020150141120A
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Korean (ko)
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KR101874843B1 (en
Inventor
이경돈
Original Assignee
서한산업(주)
한국프랜지공업 주식회사
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Application filed by 서한산업(주), 한국프랜지공업 주식회사 filed Critical 서한산업(주)
Priority to KR1020150141120A priority Critical patent/KR101874843B1/en
Publication of KR20170041546A publication Critical patent/KR20170041546A/en
Application granted granted Critical
Publication of KR101874843B1 publication Critical patent/KR101874843B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes

Abstract

It is an object of the present invention to provide a brake disk assembly of different materials which can be applied to an internal expansion brake system while achieving weight reduction of a vehicle body.
The brake disc assembly according to the present invention comprises: a friction portion formed of a first material having a coupling hole at the center thereof; A hub coupled to the friction portion along the inner periphery of the coupling hole and formed of a second material relatively light in weight compared to the first material; And a ring member formed along the inner periphery of the hub and made of a third material having a strength higher than that of the second material.

Description

{Brake disc assembly using different materials}

The present invention relates to a brake disc assembly of different materials.

Recent trends in the automotive industry are focused on developing technologies to improve fuel efficiency. In order to improve the fuel efficiency of automobiles, the company is developing various technologies including weight reduction. Various materials such as aluminum alloys capable of achieving weight reduction while maintaining rigidity in comparison with conventional ones have been developed in order to reduce weight of a vehicle body.

On the other hand, automotive brake systems are indispensable devices for braking automobiles, and technologies for achieving weight saving while maintaining braking performance of brake discs, which occupy the main weight of the brake system, are being developed.

For example, conventionally, a hub connected to an automobile wheel and a friction portion where friction occurs when the automobile is braked are both made of cast iron. The cast iron can provide a stable braking system as a relatively heavy material, but inevitably leads to a decrease in fuel consumption due to an increase in weight of the vehicle body. Therefore, in recent years, the friction portion is made of cast iron, while the hub is made of a relatively lightweight aluminum alloy or the like to achieve weight reduction of the vehicle body.

On the other hand, when looking at an automobile brake system, not only braking through the above-described friction unit but also an internal expansion system through a so-called 'brake shoe' can be used. Figure 8 shows an internal extended brake system. Referring to Fig. 8, the hub (or drum) 10 is connected to and rotates together with the vehicle wheel 12, and the brake shoe 20 and the wheel cylinder 30 are fixed to the plate 40 and do not rotate. Therefore, in order to generate the braking force, the brake shoe 20 is extended by the operation of the wheel cylinder 30 to be in close contact with the inner circumferential surface of the hub 10 and the lining 22 and the hub 10).

However, when the hub is made of aluminum alloy or the like in order to reduce the weight of the vehicle, frictional force acts on the hub as well as the above-mentioned frictional portion in the extended braking system, so that the hub can not withstand frictional force and can be damaged or broken.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a brake disk assembly of different materials which can be applied to an internal expansion type brake system while attaining weight reduction of a vehicle body in order to solve the above problems.

According to an aspect of the present invention, there is provided an image forming apparatus comprising: a friction member formed of a first material having a coupling hole at the center thereof, a second material coupled to the friction hole along the inner circumference of the coupling hole, A hub formed; And a ring member formed along the inner circumference of the hub and made of a third material having a strength higher than that of the second material.

A concave portion is formed along an inner circumferential surface of the hub, and the ring member is coupled to an inner circumferential surface of the concave portion while facing the inner circumferential surface.

And a slip prevention part for preventing slip between the ring member and the hub.

The slip prevention portion may include a groove portion formed in the other one of the protrusions formed on one of the ring member and the hub, and the protrusions are inserted and fixed.

At least one protrusion is formed along the outer periphery of the ring member, and a groove corresponding to the protrusion is formed along an inner circumferential surface of the hub.

Wherein the first material and the third material are the same.

Wherein the first material and the third material are made of cast iron, and the second material is made of an aluminum alloy.

And the ring member is formed in an elliptical shape.

And the length of the long axis of the ring member is 1% to 10% larger than the length of the short axis.

Wherein the first thickness of the ring member along the major axis direction is relatively larger than the second thickness along the minor axis direction of the ring member.

According to the brake disk assembly of the present invention having the above-described configuration, since the ring member made of a material capable of withstanding frictional force is provided on the inner side of the hub made of a relatively lightweight material, the weight of the brake disk assembly can be reduced, It can also be applied to an expression brake system.

The ring member is mounted inside the hub and the material of the ring member is made more durable than the material of the hub, thereby enhancing the strength of the hub region while minimizing the increase in weight.

On the other hand, when the outer peripheral surface of the ring member and the inner peripheral surface of the hub face each other, a slip prevention portion such as a protruding portion and a groove portion is arranged. By engaging them, it is possible to prevent the ring member from rotating relative to the hub.

Further, the ring member may be formed in an elliptical shape so that the long axis portion serves as a kind of latching jaw, thereby preventing the ring member from performing relative slip motion with respect to the hub.

1 is a perspective view of a brake disc assembly according to an embodiment of the present invention,
FIG. 2 is a perspective view of a portion of the hub shown in FIG. 1,
3 is an exploded perspective view of a brake disc assembly according to an embodiment of the present invention,
4 is a perspective view of the ring member,
5 is a side cross-sectional view of a brake disc assembly according to an embodiment of the present invention,
6 is a side cross-sectional view of a brake disc assembly according to another embodiment of the present invention,
7 is a view showing the ring member of Fig. 6,
8 is a schematic diagram showing a conventional internal expandable brake system.

Hereinafter, a brake disk assembly according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a brake disk assembly 1000 according to an embodiment of the present invention, and FIG. 2 is a perspective view illustrating a part of a hub 130 in FIG. Fig. 1 (A) is a perspective view seen from the bottom, and Fig. 1 (B) is a perspective view seen from above.

Referring to FIGS. 1 and 2, the brake disc assembly 1000 includes a friction portion 110 formed of a first material having a coupling hole 114 formed at the center thereof, A hub 130 coupled along the inner periphery of the hub 130 and formed of a second material relatively light in weight compared to the first material and a ring member 150 formed along the inner periphery of the hub 130, .

The friction portion 110 is formed of a disc having a circular shape, and a coupling hole 114 is formed at a central portion. A hub 130, which will be described later, is coupled to the coupling hole 114.

A plurality of coupling protrusions 112 for coupling with the hub 130 may be formed on the inner circumference of the coupling hole 114 of the friction portion 110. The coupling protrusion 112 is inserted and coupled to the coupling groove 136 (see FIG. 3) formed on the outer periphery of the hub 130.

Meanwhile, the friction portion 110 can be made of a relatively heavy material, such as cast iron, while being able to withstand frictional forces for braking an automobile.

The hub 130 is connected to the inner circumference of the coupling hole 114 of the friction portion 110. The hub 130 may be made of a material different from the material of the friction portion 110 and may be made of a relatively lightweight aluminum alloy in order to reduce the weight of the vehicle body. The hub 130 may have various fastening holes 134 for coupling with an automobile wheel (not shown).

The friction portion 110 and the hub 130 are combined and completed by an insert casting method.

In the manufacturing process, the frictional portion 110 in the form of a toric disk is manufactured using the cast iron casting and the first metal mold. As a result, the friction portion 110 having the coupling protrusions 112 spaced apart from each other along the inner circumferential surface of the coupling hole 114 and the coupling hole 114 is manufactured.

The hub 130 formed in such a manner as to engage with the engaging projection 112 when the aluminum casting is injected into the second metal mold after the friction portion 110 thus manufactured is bite into the second metal mold for manufacturing the hub 130 Is completed.

The hub 130 and the ring member 150 may be formed by insert casting to form a mutual coupling structure by previously providing a ring member 150 inside the second metal mold for manufacturing the hub 130. [

However, when the hub 130 and the ring member 150 are not coupled by the insert casting method, and the hub 130 and the ring member 150 are completed, the ring member 150 is fitted to the inner peripheral surface of the hub 130, May also be possible.

The ring member 150 is provided along the inner circumferential surface of the hub 130 and the friction portion 110 is disposed along the outer circumferential surface of the hub 130.

The ring member 150 may be made of a material capable of withstanding a frictional force by a so-called 'brake shoe' in the above-described extended brake system, and may be made of the same cast iron as the friction portion 110, for example .

However, the material thereof can be any material that is stronger than the hub 130, but is strong enough to withstand the pressure exerted by the brake shoes of the expandable brake.

FIG. 3 is an exploded perspective view of the brake disc assembly 1000 according to an embodiment of the present invention, and FIG. 4 is a perspective view of the ring member 150.

3 and 4, a concave portion 140 is formed along the inner circumferential surface of the hub 130, and the ring member 150 is inserted into the concave portion 140 and fixed. A plurality of coupling protrusions 112 formed along the inner periphery of the coupling hole 114 of the friction portion 110 are inserted and coupled to the coupling groove 136 formed on the outer periphery of the hub 130

As described above, the ring member 150 rubs against a brake shoe (not shown) that is expanded and closely contacted with the inner surface of the hub 130. In this case, A slip phenomenon may occur in the ring member 150 with respect to the ring member 150.

When the slip phenomenon occurs in the ring member 150, the friction braking force due to the brake shoe is not generated, so that the braking of the vehicle is not performed. Therefore, in this embodiment, it is possible to further include a slip prevention portion for preventing slip between the ring member 150 and the hub 130. [

The slip prevention part may include a groove formed in the other one of the protrusions formed on one of the ring member 150 and the hub 130, and the protrusion is inserted and fixed.

In this embodiment, as shown in the drawing, at least one protrusion 152, 154 is formed along the outer periphery of the ring member 150, and the protrusions 152, 154 are formed along the inner periphery of the hub 130 Corresponding groove portions 138 and 139 can be formed.

The grooves 138 and 139 are formed as a relative structure of the projections 152 and 154 of the finished ring member 150 when the hub 130 and the ring member 150 form a structure to be joined by insert casting, It can be formed naturally in the casting process.

However, when the ring member 150 is fitted and fixed to the inner peripheral surface of the hub 130, the grooves 138 and 139 are formed on the inner peripheral surface of the hub 130. The protrusions 152 and 154 of the ring member 150 are inserted into and fixed to the groove portions 138 and 139 formed in the recess 140.

Specifically, the protrusion of the ring member 150 includes a first protrusion 152 formed on an upper portion of the ring member 150 and a second protrusion 154 formed on a lower portion thereof.

In this case, the groove formed in the concave portion 140 of the inner circumferential surface of the hub 130 also has the first groove portion 138 corresponding to the first projecting portion 152 and the second groove portion 138 corresponding to the second projecting portion 154 And a groove portion 139.

Here, the number of the protrusions and the grooves can be appropriately adjusted according to the size of the hub 130 and the ring member 150.

The first protrusion 152 and the second protrusion 154 may be vertically aligned or may be alternately staggered.

As a result, even when friction force is applied to the ring member 150 by the above-described brake shoe, the engagement force between the protruding portions 152 and 154 of the ring member 150 and the groove portions 138 and 139 of the hub 130 The slip phenomenon of the ring member 150 can be prevented.

6 is a side sectional view showing a brake disk assembly 2000 according to another embodiment of the present invention, and Fig. 7 is a view showing a ring member 2150. As shown in Fig.

6 and 7, the brake disc assembly 200 includes a friction portion 2110, a hub 2130 coupled to the friction portion 2110, and a ring member 2130 provided along the inner periphery of the hub 2130. [ (2150).

The inner peripheral surface of the hub 2130 in this embodiment has a first diameter (D 1).

The ring member 2150 may be formed into an oval shape having a second diameter (D 2) and the second diameter (D 2) than the relatively smaller third diameter (D 3).

Here, the long axis corresponds to the second diameter (D 2 ) described above, and the short axis corresponds to the third diameter (D 3 ) described above. In this case, the second diameter D 2 may be about 1% to about 10% larger than the third diameter D 3 .

The ring member 2150 here may also be formed by forming the coupling structure by insert casting with the hub 2130 or inserted into the inner circumferential surface of the hub 2130 to form the coupling structure.

When the ring member 2150 is disposed on the inner circumferential surface of the hub 2130, the second diameter (long axis) D 2 of the ring member 2150 is relatively larger than the third diameter D 3 , It is possible to prevent the slider 2150 from slipping relative to the inner circumferential surface of the hub 2130.

In other words, if the smooth ring member 2150 without the slip prevention portion on the outer surface is circular, the slip movement relative to the inner circumferential surface of the hub 2130 will be performed. However, since the ring member 2150 is in an elliptical shape, It is possible to prevent relative slip rotational movement of the ring member 2150 by acting as a latching jaw.

The thickness of the ring member 2150 may also be determined differently along the second diameter (long axis) D 2 and the third diameter (short axis) D 3 in order to form such an ellipse.

For example, the second diameter (D 2) is relatively large compared with the inner peripheral surface diameter (D 1) of the hub 2130, and the third diameter (D 3), the second diameter relative to the direction (D 2 ) Direction.

Thus, in the ring member 2150, the second diameter (D 2) to a first thickness (t 1) and the third diameter relatively (D 3) relative to a second thickness (t 2) in accordance with the direction along the direction So that the elliptical shape can be formed naturally by thickening the thickness.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. You can do it. It is therefore to be understood that the modified embodiments are included in the technical scope of the present invention if they basically include elements of the claims of the present invention.

110 ... friction portion
130 ... Hub
150 ... ring member
1000 ... brake disc assembly

Claims (10)

A friction portion formed of a first material having a coupling hole formed at the center thereof;
A hub coupled to the friction portion along an inner periphery of the coupling hole and formed of a second material relatively light in weight compared to the first material; And
And a ring member formed along the inner periphery of the hub and made of a third material having a strength higher than that of the second material. The method according to claim 1,
Wherein a concave portion is formed along an inner circumferential surface of the hub, and the ring member is engaged while being confronted with an inner circumferential surface of the concave portion. 3. The method of claim 2,
Further comprising a slip prevention portion for preventing slip between the ring member and the hub. The method of claim 3,
The slip prevention portion
And a groove formed in the other one of the protrusions formed on one of the ring member and the hub and in which the protrusion is inserted and fixed. 5. The method of claim 4,
Wherein at least one protrusion is formed along an outer periphery of the ring member and a groove corresponding to the protrusion is formed along an inner circumferential surface of the hub. The method according to claim 1,
Wherein the first material and the third material are the same material. The method according to claim 6,
Wherein the first material and the third material are made of cast iron, and the second material is made of an aluminum alloy. The method according to claim 1,
Wherein the ring member is formed in an elliptical shape. 9. The method of claim 8,
Wherein the length of the major axis of the ring member is 1% to 10% greater than the length of the minor axis. 9. The method of claim 8,
Wherein the first thickness of the ring member along the major axis direction is relatively larger than the second thickness along the minor axis direction of the ring member.

KR1020150141120A 2015-10-07 2015-10-07 Brake disc assembly using different materials KR101874843B1 (en)

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KR1020150141120A KR101874843B1 (en) 2015-10-07 2015-10-07 Brake disc assembly using different materials

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KR20170041546A true KR20170041546A (en) 2017-04-17
KR101874843B1 KR101874843B1 (en) 2018-08-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108730366A (en) * 2017-04-20 2018-11-02 马自达汽车株式会社 Device is concluded in the friction of automatic transmission

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980053543U (en) * 1996-12-31 1998-10-07 박병재 Brake drum structure
JP2004353752A (en) * 2003-05-28 2004-12-16 Hosei Brake Ind Ltd Brake drum
JP2008151160A (en) * 2006-12-14 2008-07-03 Toyota Motor Corp Brake drum
KR20100035258A (en) * 2008-09-26 2010-04-05 주식회사 데크 Dih structure brake disk with drum for parking brake and disk roter for disc brake formed integrally
KR20100097611A (en) * 2009-02-26 2010-09-03 독터.인제니어. 하.체. 에프.포르쉐악티엔게젤샤프트 Brake disk for vehicle and method of manufacturing thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980053543U (en) * 1996-12-31 1998-10-07 박병재 Brake drum structure
JP2004353752A (en) * 2003-05-28 2004-12-16 Hosei Brake Ind Ltd Brake drum
JP2008151160A (en) * 2006-12-14 2008-07-03 Toyota Motor Corp Brake drum
KR20100035258A (en) * 2008-09-26 2010-04-05 주식회사 데크 Dih structure brake disk with drum for parking brake and disk roter for disc brake formed integrally
KR20100097611A (en) * 2009-02-26 2010-09-03 독터.인제니어. 하.체. 에프.포르쉐악티엔게젤샤프트 Brake disk for vehicle and method of manufacturing thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108730366A (en) * 2017-04-20 2018-11-02 马自达汽车株式会社 Device is concluded in the friction of automatic transmission
CN108730366B (en) * 2017-04-20 2020-03-24 马自达汽车株式会社 Friction fastening device for automatic transmission
US10655694B2 (en) 2017-04-20 2020-05-19 Mazda Motor Corporation Friction engagement device of automatic transmission

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