KR0163226B1 - Drum brake - Google Patents

Drum brake Download PDF

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Publication number
KR0163226B1
KR0163226B1 KR1019950058669A KR19950058669A KR0163226B1 KR 0163226 B1 KR0163226 B1 KR 0163226B1 KR 1019950058669 A KR1019950058669 A KR 1019950058669A KR 19950058669 A KR19950058669 A KR 19950058669A KR 0163226 B1 KR0163226 B1 KR 0163226B1
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KR
South Korea
Prior art keywords
lining
drum
rim
brake
circumferential surface
Prior art date
Application number
KR1019950058669A
Other languages
Korean (ko)
Other versions
KR970046048A (en
Inventor
권영빈
Original Assignee
정몽원
만도기계주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 정몽원, 만도기계주식회사 filed Critical 정몽원
Priority to KR1019950058669A priority Critical patent/KR0163226B1/en
Priority to GB9626760A priority patent/GB2308626A/en
Priority to JP8347726A priority patent/JPH09222141A/en
Publication of KR970046048A publication Critical patent/KR970046048A/en
Application granted granted Critical
Publication of KR0163226B1 publication Critical patent/KR0163226B1/en

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Classifications

    • 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
    • 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
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D69/0416—Attachment of linings specially adapted for curved linings
    • 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
    • F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
    • F16D51/20—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots
    • F16D51/24—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots fluid actuated
    • 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
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
    • 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
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/0441—Mechanical interlocking, e.g. roughened lining carrier, mating profiles on friction material and lining carrier
    • 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
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/045—Bonding
    • 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
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/045—Bonding
    • F16D2069/0458—Bonding metallurgic, e.g. welding, brazing, sintering

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

본 발명은 드럼브레이크에 관한 것으로, 그 목적은 림의 변형을 방지하여 라이닝이 드럼의 내주면과 균일하게 마찰되도록 하는 것이다.The present invention relates to a drum brake, the object of which is to prevent deformation of the rim so that the lining rubs uniformly with the inner peripheral surface of the drum.

본 발명에 따른 드럼브레이크는 브레이크 작동시 라이닝(54)이 부착되는 림(52b)의 형상이 변형되지 않도록 여기에 굽힘강성을 크게하는 요철부(60)를 형성하였다. 따라서 림(52b)의 단면적 변화로 굽힘강성이 증대되어 변형이 발생되지 않고 라이닝(54)이 드럼(51)의 내주면과 균일하게 마찰함으로써, 편마모가 방지되어 제동력이 향상되며 제동소음이 감소되는 이점이 있다.The drum brake according to the present invention has a concave-convex portion 60 to increase the bending stiffness therein so as not to deform the shape of the rim 52b to which the lining 54 is attached during brake operation. Therefore, the bending stiffness is increased due to the change in the cross-sectional area of the rim 52b, so that deformation does not occur, and the lining 54 uniformly rubs against the inner circumferential surface of the drum 51, thereby preventing uneven wear and improving braking force and reducing braking noise. There is this.

Description

드럼브레이크Drum brake

제1도는 일반적인 드럼브레이크의 전체적인 구성을 보인 개략도이다.1 is a schematic view showing the overall configuration of a general drum brake.

제2도는 (a)는 종래의 드럼과 브레이크슈를 보인 단면도이고, (b)는 종래 드럼브레이크의 작동상태를 도시한 것이다.2 is a cross-sectional view showing a conventional drum and a brake shoe, and (b) shows an operation state of a conventional drum brake.

제3도는 본 발명에 따른 브레이크슈를 보인 단면도이다.3 is a cross-sectional view showing a brake shoe according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

51 : 드럼 52 : 브레이크슈51: drum 52: brake shoes

52a : 웨브 52b : 림52a: Web 52b: Rim

54 : 라이닝 60 : 요철부54 lining 60: uneven portion

본 발명은 드럼브레이크에 관한 것으로, 더 상세하게는 라이닝이 부착되는 브레이크슈 림의 굽힘 강성을 크게하여 제동작동을 하는 라이닝의 편마모와 제동 소음을 방지하는 드럼브레이크의 브레이크슈에 관한 것이다.The present invention relates to a drum brake, and more particularly, to a brake shoe of a drum brake to prevent the braking noise and braking noise of the lining to increase the bending rigidity of the brake shoe to which the lining is attached.

일반적으로 차량에 장착되는 브레이크는 주행중의 자동차를 감속하거나 정지 또는 정지 상태를 유지하기 위한 장치이다. 이러한 기능을 하는 브레이크는 주행중의 운동에너지를 기계적인 마찰장치에 의해서 열에너지로 바꾸어 그의 마찰열을 대기중에 방출하여 제동을 하는 방식으로써, 디스크식 유압 브레이크와 드럼식 유압 브레이크 등이 있는데, 이 드럼식 유압 브레이크는 디스크 대신에 휠과 함께 회전하는 원통형의 드럼을 그 내부에서 라이닝과 마찰시켜 제동력을 얻는 것이다.In general, a brake mounted on a vehicle is a device for decelerating or stopping or maintaining a stopped vehicle. Brake that functions like this is a method that converts the kinetic energy while driving into thermal energy by mechanical friction device and releases its frictional heat into the air and brakes. There are disc type hydraulic brake and drum type hydraulic brake. Instead of the disk, a cylindrical drum that rotates with the wheel rubs against the lining inside it to obtain braking force.

일반적인 드럼브레이크는 제1도와 제2도에 도시한 바와 같이, 백플레이트(30)에 고정된 앵커(53)을 이용하여 각각의 일단부가 지지되고, 이를 중심으로 외향작동하는 한쌍의 반원형 브레이크슈(52), 브레이크슈(52)의 외주면에 마련되어 드럼(51)과 마찰하여 휠(미도시)을 제동하는 라이닝(54) 등으로 구성된다.As shown in FIG. 1 and FIG. 2, a general drum brake has a pair of semi-circular brake shoes which are supported at one end by an anchor 53 fixed to the back plate 30 and operate outwardly. 52, linings 54 provided on the outer circumferential surface of the brake shoe 52 to brake the wheels (not shown) by friction with the drum 51.

브레이크슈(52)는 라이닝(54)이 부착되는 림(52b), 림(52b)의 내주면에 결합되어 그 일단은 고정 앵커(53)에 결합되고 타단은 휠실린더(40)와 결합되는 판상의 웨브(52a)로 이루어진다.The brake shoe 52 is coupled to the inner circumferential surface of the rim 52b to which the lining 54 is attached, one end of which is coupled to the fixing anchor 53, and the other end of the plate shoe is coupled to the wheel cylinder 40. Web 52a.

그리고 이러한 브레이크슈(52)는 휠실린더(40)에 의해 작동되며, 리턴스프링(55)에 의해 다시 복원된다. 이를 위해 휠실린더(40)는 그 몸체를 이루는 하우징(4) 내부에 양면이 개방된 실린더부(미도시)가 형성되어 있고, 실린더부를 유압에 의해 진퇴운동하는 한쌍의 피스톤(미도시)되어 있다. 이 피스톤의 선단부에는 각각의 브레이크슈(52) 웨브(52a)의 타단이 접촉되어 있다.The brake shoe 52 is operated by the wheel cylinder 40 and restored by the return spring 55. To this end, the wheel cylinder 40 has a cylinder portion (not shown) having both sides open in a housing 4 constituting the body, and a pair of pistons (not shown) for moving the cylinder portion back and forth by hydraulic pressure. . The other end of each brake shoe 52 and web 52a is in contact with the front end of the piston.

이와 같이 구성된 일반적인 드럼브레이크는 운전자가 브레이크패달(10)을 밟게 되면 마스터실린더(20)에서 배력이 발생하여 이 유압이 드럼브레이크의 휠실린더(40) 내부로 전달된다. 그리고 이 유압에 의해 피스톤이 작동하게 되어 브레이크슈(52)를 외향으로 밀어줌으로써, 브레이크슈(52)의 외부에 부착된 라이닝(54)이 휠(미도시)과 함께 회전하는 드럼(51)의 내주면과 마찰하여 제동작용을 하게 된다.In the general drum brake configured as described above, when the driver presses the brake pedal 10, the back pressure is generated in the master cylinder 20, and the hydraulic pressure is transmitted to the wheel cylinder 40 of the drum brake. The piston is operated by the hydraulic pressure to push the brake shoe 52 outward so that the lining 54 attached to the outside of the brake shoe 52 rotates together with a wheel (not shown). The friction is caused by friction with the inner circumferential surface.

그러나, 이러한 일반적인 드럼브레이크는 다음과 같은 문제점이 있다. 일반적으로 브레이크슈(52)는 T 자형으로 되어 있는데, 라이닝(54)이 부착되는 림(52b), 림(52b)의 내주면 중심부위에 결합되어 휠실린더(40)의 작동에 따라 브레이크슈(52)를 외향작동시키는 웨브(52a)로 구성되고 있다.However, such a general drum brake has the following problems. Generally, the brake shoe 52 has a T-shape. The brake shoe 52 is coupled to the rim 52b to which the lining 54 is attached, and the inner circumferential surface center of the rim 52b to operate the wheel cylinder 40 according to the operation of the wheel cylinder 40. It consists of a web 52a which operates outwardly.

따라서, 제2도의 (b)에 도시한 바와 같이, 휠실린더(40)의 작동에 따라 림(52b)과 함께 일체로 결합된 웨브(52a)가 외측으로 벌어져 라이닝(54)이 드럼(51)의 내주면과 마찰함으로써 제동력을 얻게 되는데, 단면적이 상대적으로 넓은 림(52b)을 결합면적이 좁은 웨브(52a)가 중앙에서 밀게 됨으로, 힘의 전달분포가 고르지 못하게 된다.Accordingly, as shown in FIG. 2 (b), the web 52a integrally coupled with the rim 52b is opened to the outside according to the operation of the wheel cylinder 40 so that the lining 54 is the drum 51. The frictional force is obtained by friction with the inner circumferential surface of the web, and the web 52a having a small coupling area is pushed in the center of the rim 52b having a relatively large cross-sectional area, thereby uneven distribution of force.

즉, 웨브(52a)가 직접 결합된 림(52b)의 중심부분은 힘이 가장 많이 전달되어 이 이부분의 라이닝(54)이 드럼(51)과 가장 큰 마찰력으로 작동하게 되고, 웨브(52a)와 멀리 떨어진 림(52b)의 폭방향 가장자리 부분은 힘이 적게 전달되어 내측으로 밴딩 변형된다.That is, the center portion of the rim 52b to which the web 52a is directly coupled has the greatest force transmitted so that the lining 54 of this portion operates with the greatest friction force with the drum 51, and the web 52a The widthwise edge portion of the rim 52b far away from and deforms inwardly with less force transmitted.

따라서 밴딩된 부분의 라이닝(54)은 드럼(51) 내주면과의 마찰압력이 상대적으로 약하게 됨으로써, 라이닝(54)이 편마모되어 전체적인 신뢰성이 떨어지는 것은 물론이며 드럼브레이크의 제동력이 저하되어 안전상의 문제점이 발생된다.Therefore, the lining 54 of the bent portion has a relatively weak frictional pressure with the inner circumferential surface of the drum 51. As a result, the lining 54 wears unevenly and thus the overall reliability is lowered. Is generated.

본 발명은 이러한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 브레이크 작동시 라이닝이 부착되는 림의 형상이 변형되지 않도록 여기에 굽힘강성을 크게하는 요철부를 형성함으로써, 림의 단면적 변화로 굽힘강성이 증대되어 변형이 발생되지 않고 라이닝이 드럼의 내주면과 균일하게 마찰하는 드럼브레이크를 제공하는 것이다.The present invention is to solve this problem, an object of the present invention is to form a concave-convex portion to increase the bending stiffness so that the shape of the rim to which the lining is attached during deformation of the brake, the bending stiffness by the cross-sectional area of the rim It is to provide a drum brake that is increased so that deformation does not occur and the lining rubs uniformly with the inner circumferential surface of the drum.

이러한 목적을 달성하기 위한 본 발명은, 휠과 함께 회전하는 드럼, 드럼의 내주면과 마찰하여 제동작용을 하는 라이닝, 라이닝이 부착되는 림과 이이 중심부 위에 길이방향으로 부착된 웨브로 이루어진 브레이크슈를 갖춘 드럼브레이크에 있어서, 림의 가장자리부위에는 라이닝이 드럼에 균일하게 마찰하도록 단면적의 변경으로 굽힘강성을 크게하여 변형을 방지하는 다수개의 요철부가 마련되는 것을 특징으로 한다.The present invention for achieving this object is provided with a brake shoe consisting of a drum that rotates with the wheel, a lining that rubs against the inner circumferential surface of the drum to brake, a rim to which the lining is attached, and a web attached longitudinally over the central portion thereof. In the drum brake, a plurality of irregularities are provided at the edge of the rim to increase the bending stiffness by changing the cross-sectional area so that the lining rubs against the drum evenly.

이하, 본 발명에 따른 하나의 바람직한 실시예를 첨부도면을 참조하여 상세히 설명한다.Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

제3도는 본 발명에 따른 드럼브레이크의 브레이크슈의 림을 보인 단면도이다.(본 발명에 따른 드럼브레이크는 브레이크슈 림의 구조를 제외하고는 종래의 구성과 동일하기 때문에 동일구성요소에 대해서는 제1도와 전술한 내용을 참조하고 이하에서는 간략하게 설명한다.)3 is a cross-sectional view showing the rim of the brake shoe of the drum brake according to the present invention. (The drum brake according to the present invention is the same as the conventional configuration except for the structure of the brake shoe rim. Reference is made to the above description and will be described briefly below.)

드럼브레이크는 이에 도시한 바와 같이, 자동차의 휠과 함께 회전하는 드럼(51), 드럼(51)의 내주면과 마찰하여 제동작용을 하는 라이닝(54), 라이닝(54)이 접착제를 이용하여 부착되는 림(52b)과 웨브(52a)로 이루어진 브레이크슈(52), 제 동유압에 의해 브레이크슈(52)를 외향 작동시키는 휠실린더(40) 등으로 구성되어 있다.The drum brake is attached to the drum 51, which rotates together with the wheels of the vehicle, the lining 54 and the lining 54, which rub against the inner circumferential surface of the drum 51 and brake, as shown in FIG. The brake shoe 52 which consists of a rim 52b and the web 52a, the wheel cylinder 40 which operates the brake shoe 52 outward by braking hydraulic pressure, etc. are comprised.

브레이크슈(52)는 그 단면이 T자 형상으로 이루어져 있는데, 이것은 라이닝(54)이 부착된 림(52b), 림(52b)의 내측부 결합되며 휠실린더(40)의 작동에 따라 외향 작동되는 웨브(52a)가 일체로 구성되어 있다.The brake shoe 52 has a T-shaped cross section, which is coupled to the inner portion of the rim 52b to which the lining 54 is attached and the inner side of the rim 52b, and is operated outwardly according to the operation of the wheel cylinder 40. 52a is comprised integrally.

림(52b)은 소정의 폭을 가지며 반원형상으로 밴딩되어 있어서 외주면에 라이닝(54)이 접착제를 이용하여 부착된다. 그리고 웨브(52a)는 이러한 림(52b)의 내측면 중심부위에 길이방향으로 용접수단을 통해 결합되어 있으며, 일단부는 고정지지되고 타단부는 휠실린더(40)에 내장된 피스톤(미도시) 선단과 접촉되어 있다.The rim 52b has a predetermined width and is bent in a semicircular shape so that the lining 54 is attached to the outer circumferential surface by using an adhesive. And the web (52a) is coupled via the welding means in the longitudinal direction on the inner surface center of the rim (52b), one end is fixedly supported and the other end and the piston (not shown) the tip embedded in the wheel cylinder 40 and In contact.

한편, 제동작용시 림(52b)의 내측 중심부에 용접된 웨브(52a)에 의해 힘이 전달되어 라이닝(54)이 마찰작용을 하는데, 라이닝(54)이 부착된 림(52b)에는 변형을 방지하기 위한 수단으로 다수개의 요철부(60)가 형성되어 있다. 즉, 라이닝(54)이 부착된 림(52b)에는 제동작용시 내측부 중심에서 힘이 전달되기 때문에 림(52b)의 폭방향 가장자리부위는 변형이 발생될 우려가 있는데, 이를 방지하기 위해 굽힘하중에 대한 변형저항인 굽힘강성(flexural rigidity, EI/(1-υ2), E는 영 계수, I는 단면 2차 모멘트, υ는 프아송 비)을 증대시키기 위해 가장자리부위에 폭방향으로 다수개의 세장형 요철부(60)를 구성하였다.On the other hand, during braking, the force is transmitted by the web 52a welded to the inner center of the rim 52b so that the lining 54 performs a frictional action, and the rim 52b to which the lining 54 is attached prevents deformation. A plurality of uneven parts 60 are formed as a means for doing so. That is, since the force is transmitted from the inner center of the rim 52b to which the lining 54 is attached, the edge portion of the rim 52b in the widthwise direction of the rim 52b may be deformed. A number of three widthwise edges at the edges to increase the flexural rigidity (EI / (1-υ 2 ), E is the Young's modulus, I is the cross-sectional secondary moment, and υ is the Poisson's ratio. The long uneven part 60 was comprised.

요철부(60)는 웨브(52a)가 용접된 부분으로부터 일정간격 이격된 림(52b)의 가장자리부위에 다수개 형성되어 있어서, 이로 인한 단면적 변화로 림(52b)의 변형량이 감소되며 라이닝(54) 전체가 고르게 마찰하여 편마모가 방진된다.The uneven portion 60 is formed on the edge portion of the rim 52b spaced at regular intervals from the portion where the web 52a is welded, so that the deformation amount of the rim 52b is reduced due to the cross-sectional change, and the lining 54 ) All the surfaces are evenly rubbed, and the wear and tear is dustproof.

또한 요철부(60)가 형성된 림(52b)의 외주면에 라이닝(54)이 접착제를 이용하여 부착되는데, 접촉되는 단면적 증대로 접착력이 향상되어 전단력에 의해 분리이탈되지 않는다.In addition, the lining 54 is attached to the outer circumferential surface of the rim 52b in which the uneven portion 60 is formed, and the adhesive force is improved by increasing the cross-sectional area contacted so that it is not separated from the shear force.

다음에는 이와 같이 구성된 드럼브레이크의 작용 및 효과는 다음과 같다.Next, the operation and effects of the drum brake configured as described above are as follows.

먼저, 운전자가 브레이크패달(10)를 밟게 되면, 마스터실린더(20)에서 제동 유압이 형성되어 휠실린더(40)로 전달되어 피스톤(미도시)이 외측으로 전진하게 된다. 이에 따라 브레이크슈(52)의 웨브(52a)가 바깥측으로 밀림으로써, 림(52b)의 외주면에 부착된 라이닝(54)이 드럼(51)의 내주면과 마찰하여 제동작용을 하게 된다. 그리고 브레이크패달(10)을 놓으면 복원스프링(55)의 탄성복원력에 의해 브레이크슈(52)는 원래의 위치로 되돌아간다.First, when the driver steps on the brake pedal 10, a braking hydraulic pressure is formed in the master cylinder 20 and transferred to the wheel cylinder 40 so that the piston (not shown) moves forward. Accordingly, the web 52a of the brake shoe 52 is pushed outward so that the lining 54 attached to the outer circumferential surface of the rim 52b rubs against the inner circumferential surface of the drum 51 to perform a braking action. When the brake pedal 10 is released, the brake shoe 52 returns to its original position by the elastic restoring force of the restoring spring 55.

이 때, 림(52b)은 내측 중심부에 용접되어 있는 웨브(52a)로부터 힘이 전달되어 라이닝(54)을 고르게 마찰시키는 작용을 하는데, 이의 가장자리부위에는 굽힘 강성을 크게하여 변형을 방지하는 요철부(60)가 형성되어 있어서 라이닝(54)이 휠과 함께 회전하는 드럼(51)과 균일하게 마찰하여 편마모가 방지된다.At this time, the rim 52b transmits a force from the web 52a welded to the inner center to evenly rub the lining 54. The rim 52b has an uneven portion to increase the bending stiffness to prevent deformation. 60 is formed so that the lining 54 rubs uniformly with the drum 51 which rotates together with the wheel to prevent uneven wear.

즉, 림(52b)의 가장자리부위에 마련된 요철부(60)에 의해 굽힘강성이 증대되어 변형되지 않기 때문에, 라이닝(54) 전체에 결쳐서 균일한 힘을 전달한다. 이에 따라 라이닝(54)이 드럼(51)의 내주면과 균일하게 마찰하여 제동작용을 함으로써 제동력이 향상되며, 또한 균일하게 마찰하기 때문에 편마모가 발생되지 않고 제도 소음도 줄어들게 된다.That is, since the bending stiffness is increased by the uneven portion 60 provided at the edge of the rim 52b and is not deformed, the uniform force is transmitted to the entire lining 54. Accordingly, since the lining 54 rubs against the inner circumferential surface of the drum 51 uniformly and brakes, the braking force is improved, and since the lining 54 uniformly rubs, uneven wear is not generated and draft noise is also reduced.

또한, 앞에서 설명한 바와 같이 림(52b)의 외주면과 라이닝(54)의 접착면적 증대로 접착력 또한 향상되어 라이닝(54)이 제동시 전단력에 의해 이탈되지 않아 이의 신뢰성이 향상되는 이점이 있다.In addition, as described above, the adhesive force is also improved by increasing the adhesion area between the outer circumferential surface of the rim 52b and the lining 54 so that the lining 54 is not separated by the shearing force during braking, thereby improving its reliability.

이러한 기술적 사상은 림(52b)의 가장자리부에 요철부(60)를 폭방향으로 형성하는 것에 국한하지 않고, 세로방향으로 형성하여도 굽힘강성이 증대되는 것은 물론이고, 림(52b)의 가장자리 내측부에 별도의 보강부재(미도시)를 부착하여도 본 발명에 따른 소기 목적을 달성할 수 있음은 물론이다.This technical concept is not limited to the formation of the uneven portion 60 in the width direction at the edge portion of the rim 52b, and the bending stiffness is increased even when formed in the longitudinal direction, and the inner side of the edge of the rim 52b. Of course, even if a separate reinforcing member (not shown) attached to it can achieve the desired purpose according to the present invention.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 드럼브레이크는 브레이크 작동시 라이닝이 부착되는 림의 형상이 변형되지 않도록 여기에 굽힘강성을 크게하는 요철부를 형성하였다. 따라서 림의 단면적 변화로 굽힘강성이 증대되어 변형이 발생되지 않고 라이닝이 드럼의 내주면과 균일하게 마찰함으로써, 편마모가 방지되어 제동력이 향상되며 제동소음이 감소되는 이점이 있다.As described above in detail, the drum brake according to the present invention has a concave-convex portion to increase the bending stiffness here so that the shape of the rim to which the lining is attached is not deformed during brake operation. Therefore, the bending stiffness is increased due to the change in the cross-sectional area of the rim so that deformation does not occur, and the lining uniformly rubs against the inner circumferential surface of the drum, thereby preventing uneven wear and improving braking force and reducing braking noise.

Claims (1)

훨과 함께 회전하는 드럼(51), 상기 드럼(51)의 내주면과 마찰하여 제동작용을 하는 라이닝(54), 상기 라이닝(54)이 부착되는 림(52b)과 이의 중심부위에 길이방향으로 부착된 웨브(52a)로 이루어진 브레이크슈(52)를 갖춘 드럼브레이크에 있어서, 상기 림(52b)의 가장자리부위에는 상기 라이닝(54)이 상기 드럼(51)에 균일하게 마찰하도록 단면적의 변경으로 굽힘강성을 크게하여 변형을 방지하는 다수개의 요철부(60)가 마련되는 것을 특징으로 하는 드럼브레이크.The drum 51 rotating together with the whirl, a lining 54 for braking action by friction with the inner circumferential surface of the drum 51, a rim 52b to which the lining 54 is attached, and a lengthwise attached to the central portion thereof. In a drum brake having a brake shoe (52) made of a web (52a), bending stiffness is provided at the edge of the rim (52b) by changing the cross-sectional area so that the lining (54) rubs against the drum (51) uniformly. Drum brake, characterized in that provided with a plurality of uneven parts 60 to prevent deformation.
KR1019950058669A 1995-12-27 1995-12-27 Drum brake KR0163226B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019950058669A KR0163226B1 (en) 1995-12-27 1995-12-27 Drum brake
GB9626760A GB2308626A (en) 1995-12-27 1996-12-23 A drum brake for an automotive vehicle
JP8347726A JPH09222141A (en) 1995-12-27 1996-12-26 Drum brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950058669A KR0163226B1 (en) 1995-12-27 1995-12-27 Drum brake

Publications (2)

Publication Number Publication Date
KR970046048A KR970046048A (en) 1997-07-26
KR0163226B1 true KR0163226B1 (en) 1998-12-01

Family

ID=19445038

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950058669A KR0163226B1 (en) 1995-12-27 1995-12-27 Drum brake

Country Status (3)

Country Link
JP (1) JPH09222141A (en)
KR (1) KR0163226B1 (en)
GB (1) GB2308626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030031606A (en) * 2001-10-15 2003-04-23 주식회사 만도 Drum brake with brake shoe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1305030A (en) * 1969-11-21 1973-01-31 Girling Ltd
JPS5187183U (en) * 1975-01-08 1976-07-13
FR2498276B2 (en) * 1980-02-12 1986-08-14 Valeo FRICTION ELEMENT, ESPECIALLY BRAKE PAD
US4569424A (en) * 1984-01-27 1986-02-11 Taylor Jr James L Brake shoe construction
JPS6127324A (en) * 1984-07-18 1986-02-06 Nissan Motor Co Ltd Shoe for drum brake

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030031606A (en) * 2001-10-15 2003-04-23 주식회사 만도 Drum brake with brake shoe

Also Published As

Publication number Publication date
GB9626760D0 (en) 1997-02-12
GB2308626A (en) 1997-07-02
KR970046048A (en) 1997-07-26
JPH09222141A (en) 1997-08-26

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