KR20030031606A - Drum brake with brake shoe - Google Patents

Drum brake with brake shoe Download PDF

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Publication number
KR20030031606A
KR20030031606A KR1020010063318A KR20010063318A KR20030031606A KR 20030031606 A KR20030031606 A KR 20030031606A KR 1020010063318 A KR1020010063318 A KR 1020010063318A KR 20010063318 A KR20010063318 A KR 20010063318A KR 20030031606 A KR20030031606 A KR 20030031606A
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KR
South Korea
Prior art keywords
rim
brake
drum
lining
braking
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Application number
KR1020010063318A
Other languages
Korean (ko)
Inventor
고원찬
Original Assignee
주식회사 만도
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Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020010063318A priority Critical patent/KR20030031606A/en
Publication of KR20030031606A publication Critical patent/KR20030031606A/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
    • F16D65/09—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
    • 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

Abstract

PURPOSE: A drum brake having a brake shoe is provided to prevent uneven wear of the lining, and to reduce braking noise by distributing pressure to the lining evenly with modifying the structure of the brake shoe rim. CONSTITUTION: A drum brake has a drum(10) rotating with a wheel, brake shoes mounting a lining(31) contacted to the drum for braking, a wheel cylinder between brake shoes, an arc rim(32) mounting the lining, and a web(33) mounted in the middle of the rim and contacted to the wheel cylinder. An uneven bead part(32a) is formed along the web mounting portion in the rim to increase the flexible rigidity in changing the sectional area and prevent deformation of the rim in braking. Braking force is improved, and uneven wear and braking noise are reduced with contacting the lining to the drum evenly.

Description

브레이크슈를 갖춘 드럼 브레이크{Drum brake with brake shoe}Drum brake with brake shoe

본 발명은 드럼 브레이크에 관한 것으로, 더욱 상세하게는 드럼과 마찰하여 제동력을 발휘하도록 라이닝이 부착된 브레이크슈를 갖춘 드럼 브레이크에 관한 것이다.The present invention relates to a drum brake, and more particularly to a drum brake having a brake shoe with a lining attached to exert a braking force by friction with the drum.

일반적으로 차량에 장착되는 드럼 브레이크는 휠과 함께 회전하는 드럼을 라이닝과 마찰시켜 제동력을 얻는 것으로, 원통형상의 드럼과, 앵커블럭을 기점으로 백플레이트의 가장자리에 대칭되게 배치되며 외주에 라이닝이 부착된 한 쌍의 브레이크슈와, 제동유압을 전달받아 브레이크슈를 각각 반경방향으로 외향 작동시키기 위해 피스톤이 내장된 휠실린더를 갖추고 있다.Generally, a drum brake mounted on a vehicle obtains braking force by rubbing a drum rotating together with a wheel with a lining. The drum brake is arranged symmetrically on the edge of the back plate with a cylindrical drum and an anchor block. It is equipped with a pair of brake shoes and a wheel cylinder with a built-in piston for radially outward operation of the brake shoes under braking hydraulic pressure.

따라서 운전자가 브레이크패달을 밟아 마스터실린더 어셈블리에서 발생된 제동유압이 휠실린더로 전달된다. 계속하여 제동유압에 의해 휠실린더의 피스톤이 브레이크슈를 각각 외향으로 밀어주며, 이것에 의해 라이닝이 휠과 함께 회전하는 드럼과 마찰하여 제동력이 발생된다.Therefore, when the driver presses the brake pedal, the braking hydraulic pressure generated in the master cylinder assembly is transmitted to the wheel cylinder. Subsequently, the braking hydraulic pressure causes the pistons of the wheel cylinders to push the brake shoes outward, whereby the lining rubs against the drum rotating with the wheels, thereby generating braking force.

도 1에 도시한 바와 같이, 이러한 종래 드럼 브레이크의 브레이크슈(2)는 드럼(1)에 수용 배치되며 외주에 라이닝(2a)이 길이방향으로 부착되는 림(2b)과, 이 림(2b)의 내주 중심부위에 길이방향으로 용접되어 앵커블럭(미도시)과 타단은 휠실린더(미도시)의 피스톤(미도시)과 접촉되는 웨브(2c)를 구비하며, 그 단면이 "T" 자 형상으로 이루어져 있다.As shown in FIG. 1, the brake shoe 2 of such a conventional drum brake is accommodated in the drum 1 and has a rim 2b having a lining 2a attached to its outer circumference in a longitudinal direction, and the rim 2b. The longitudinally welded on the inner circumferential center of the anchor block (not shown) and the other end has a web (2c) in contact with the piston (not shown) of the wheel cylinder (not shown), the cross-section of the "T" shape consist of.

이로 인해 제동 작용 시 단면적이 상대적으로 넓은 림(2b)을 중앙부위에서 접합 면적이 좁은 웨브(2c)가 밀게 되므로, 힘의 전달분포가 고르지 못하게 된다.As a result, the web 2c having a narrow junction area is pushed at the center of the rim 2b having a relatively large cross-sectional area at the time of braking action, resulting in uneven distribution of force transmission.

즉, 웨브(2c)가 접합되는 림(2b)의 중앙부분에 가장 많은 힘이 전달되어 라이닝(2a)의 중앙부위가 가장 큰 마찰력으로 작동하며, 웨브(2c)와 멀리 떨어진 림(2b)의 폭방향 가장자리 부분에 상대적으로 힘이 적게 전달되어 내측으로 벤딩 변형된다. 따라서 라이닝(2a)의 폭방향 가장자리 부분은 마찰압력이 상대적으로 약하며, 이것이 라이닝(2a)의 편마모 및 제동력 저하의 원인이 된다.That is, the most force is transmitted to the center portion of the rim 2b to which the web 2c is joined, so that the center portion of the lining 2a operates with the greatest friction force, and the rim 2b is far from the web 2c. Less force is transmitted to the edge portion in the width direction to bend inwardly. Accordingly, the widthwise edge portion of the lining 2a has a relatively low frictional pressure, which causes uneven wear and a decrease in braking force of the lining 2a.

본 발명은 이러한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 림의 형상을 개선하여 제동 작용 시 라이닝에 가해지는 압력분포를 균일하게 함으로써 라이닝의 편마모 및 제동 소음을 방지할 수 있는 브레이크슈를 갖춘 드럼 브레이크를 제공하는 것이다.The present invention is to solve this problem, an object of the present invention is to improve the shape of the rim to equalize the pressure distribution applied to the lining during braking action with a brake shoe that can prevent lining wear and braking noise of the lining To provide a drum brake.

도 1은 종래 드럼 브레이크의 브레이크슈 작동상태를 개략적으로 보인 것이다.1 schematically illustrates a brake shoe operating state of a conventional drum brake.

도 2는 본 발명에 따른 드럼 브레이크의 전체적인 구조를 보인 것이다.Figure 2 shows the overall structure of the drum brake according to the present invention.

도 3은 본 발명에 따른 브레이크슈를 발췌하여 보인 사시도이다.3 is a perspective view showing an extract of a brake shoe according to the present invention.

도 4는 도 3의 Ⅳ - Ⅳ 선에 따른 단면도이다.4 is a cross-sectional view taken along line IV-IV of FIG. 3.

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

10..드럼 30R,30T..브레이크슈10.Drum 30R, 30T..Brake Shoe

31..라이닝 32..림31. Lining 32. Rim

32a..요철비드부 33..웨브32a.Uneven bead part 33.Web

이러한 목적을 달성하기 위한 본 발명은;The present invention for achieving this object is;

휠과 함께 회전하는 드럼과, 드럼의 내주와 마찰하여 제동력을 발휘하도록 라이닝이 부착된 한 쌍의 브레이크슈와, 브레이크슈 사이에 배치되어 제동유압에 의해 이들을 작동시키기 위한 휠실린더를 구비하며,A drum that rotates with the wheel, a pair of brake shoes with linings to friction with the inner circumference of the drum, and a wheel cylinder disposed between the brake shoes to operate them by braking hydraulic pressure,

브레이크슈는 외주에 라이닝이 부착되는 원호형상의 림과, 림의 내주 중앙부위에 길이방향으로 접합되며 단부가 휠실린더와 접하도록 배치되는 웨브를 갖춘 드럼 브레이크에 있어서,A brake shoe is a drum brake having an arc-shaped rim having a lining attached to an outer circumference thereof, and a web joined longitudinally to an inner circumferential portion of the rim, the end of which is disposed to be in contact with a wheel cylinder.

림에는 단면적의 변화로 굽힘 강성이 증대되도록 웨브가 접합되는 중앙부위를 따라 길이방향으로 요철비드부가 형성되어, 제동 작용 시 림의 폭방향 변형을 방지하는 것을 특징으로 한다.The rim is formed with a concave-convex bead in the longitudinal direction along the central portion where the web is joined so that the bending rigidity is increased by the change in the cross-sectional area, it characterized in that to prevent the lateral deformation of the rim during braking action.

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

도 2를 참조하면, 본 발명에 따른 드럼 브레이크는 차량의 휠(미도시)과 함께 회전하는 원통상의 드럼(10)과, 백플레이트(20)의 가장자리부분에서 외향 작동하여 드럼(10) 내주와 마찰하도록 라이닝(31)이 부착된 한 쌍의 브레이크슈(30R)(30T)와, 제동유압을 전달받아 브레이크슈(30R)(30T)를 작동하도록 피스톤(미도시)이 내장된 휠실린더(40)와, 제동 작용 해제 시 브레이크슈(30R)(30T)를 복원시키기 위한 리턴스프링(50)과, 휠실린더(40)와 대향되는 백플레이트(20)의 가장자리부위에 장착되어 각 브레이크슈(30R)(30T)의 외향 작동을 지지하는 앵커블럭(60)을 갖추고 있다.2, the drum brake according to the present invention is a cylindrical drum 10 that rotates together with a wheel (not shown) of the vehicle, and outwardly operated at the edge of the back plate 20, the inner circumference of the drum 10 A pair of brake shoes 30R and 30T with a lining 31 attached thereto to friction with the wheel cylinder, and a piston (not shown) with a piston (not shown) to operate the brake shoes 30R and 30T under braking hydraulic pressure. 40, a return spring 50 for restoring the brake shoes 30R and 30T when the braking action is released, and an edge portion of the back plate 20 facing the wheel cylinder 40 and mounted on each brake shoe ( And an anchor block 60 for supporting outward operation of 30R and 30T.

한 쌍의 브레이크슈(30R)(30T)는 일단이 앵커블럭(21)에 지지되고 타단이 휠실린더(40)와 접하도록 배치되는데, 휠실린더(40)를 중심으로 드럼(10)의 전진회전 방향(도 2의 화살표 A 방향) 측의 것을 리딩슈(30R), 그 반대방향 측의 것을 트레일링슈(30T)라 하여 구별한다.The pair of brake shoes 30R and 30T are disposed such that one end thereof is supported by the anchor block 21 and the other end thereof is in contact with the wheel cylinder 40. The forward rotation of the drum 10 around the wheel cylinder 40 is performed. The one on the side of the direction (arrow A in Fig. 2) is distinguished as the leading shoe 30R and the trailing shoe 30T on the opposite side.

이러한 브레이크슈(30R)(30T)는 도 3과 도 4에 도시한 바와 같이, 단면이 대체로 "T" 자 형상으로 이루어지며, 접착제를 통해 외주에 라이닝(31)이 부착된 원호형상의 금속재 림(32, RIM)과, 이 림(32)의 내주에 용접수단을 통해 접합되며 상단이 휠실린더(40)의 피스톤(미도시)과 접하며 하단이 앵커블럭(60)에 지지되는 금속판상의 웨브(33,WEB)를 구비한다. 이에 따라 휠실린더(40)에 제동유압이 전달되면, 리딩슈(30R)와 트레일링슈(30T)는 앵커블럭(60)을 중심으로 외향 작동하여 라이닝(31)이 드럼(10) 내주와 마찰하게 된다.As shown in FIGS. 3 and 4, the brake shoes 30R and 30T have a generally “T” shape in cross section, and an arc-shaped metal rim having a lining 31 attached to the outer circumference through an adhesive. (32, RIM), a metal plate-shaped web joined to the inner circumference of the rim 32, the upper end is in contact with the piston (not shown) of the wheel cylinder 40, and the lower end is supported by the anchor block 60 ( 33, WEB). Accordingly, when brake hydraulic pressure is transmitted to the wheel cylinder 40, the leading shoe 30R and the trailing shoe 30T operate outwardly about the anchor block 60 so that the lining 31 rubs against the inner circumference of the drum 10. do.

또한, 각 브레이크슈(30R)(30T)의 림(32)에는 제동 작용 시 변형을 방지하기 위한 수단으로, 웨브(33)가 접합되는 중앙부위를 따라 요철비드부(32a)가 일체로 성형되어 있다. 이 요철비드부(32a)는 림(32)의 중앙부위를 따라 길이방향으로 오목하게 이루어져 있어서, 림(32)의 내주에 대해 내측방향으로 돌출되며 외주에 대해 오목하게 함몰된 구성이다. 이로 인해, 림(21)은 단면적의 변화로 굽힘 하중에 대한 변형저항인 굽힘 강성(flexural rigidity)이 증대됨으로써, 제동 작용 시 림(32)의 중앙부위 및 가장자리 위치 구분 없이 균일한 힘이 전달되게 된다.In addition, the rim 32 of each brake shoe 30R (30T) as a means for preventing deformation during braking action, the uneven bead portion (32a) is integrally molded along the central portion where the web 33 is joined have. The uneven bead portion 32a is concave in the longitudinal direction along the central portion of the rim 32, protruding inwardly with respect to the inner circumference of the rim 32 and recessed concavely with respect to the outer circumference. As a result, the rim 21 increases flexural rigidity, which is a deformation resistance to bending load, due to a change in the cross-sectional area, so that a uniform force is transmitted without discriminating the center and edge positions of the rim 32 during braking. do.

이러한 현상은 앞에서 기술한 바와 같이, 요철비드부(32a)가 웨브(33)가 접합되는 림(32)의 중앙부위를 따라 길이방향으로 형성되어 있어서, 단면적 변화로 림(32)의 변형 량이 감소되기 때문이다.As described above, the uneven bead portion 32a is formed in the longitudinal direction along the central portion of the rim 32 to which the web 33 is joined, so that the deformation amount of the rim 32 decreases due to the cross-sectional area change. Because it becomes.

다음에는 이와 같이 구성된 본 발명에 따른 드럼브레이크의 작동 및 효과를 설명한다.Next, the operation and effects of the drum brake according to the present invention configured as described above will be described.

먼저, 차량이 주행 중인 상태에서 운전자가 브레이크패달(미도시)을 밟으면, 마스터실린더 어셈블리(미도시)에서 형성된 제동유압이 휠실린더(40)로 전달되어 피스톤(미도시)이 전진한다.First, when the driver steps on a brake pedal (not shown) while the vehicle is running, the braking hydraulic pressure generated in the master cylinder assembly (not shown) is transmitted to the wheel cylinder 40 to advance the piston (not shown).

따라서 앵커블럭(60)을 중심으로 한 쌍의 브레이크슈(30R)(30T)가 각각 반대방향으로 외향 작동함으로써, 회전하는 드럼(10)과 라이닝(31)이 마찰하여 제동력이 발생된다.Therefore, the pair of brake shoes 30R and 30T operate outwardly in the opposite direction with respect to the anchor block 60, respectively, so that the rotating drum 10 and the lining 31 rub and generate a braking force.

이 때, 림(32)은 중앙부위를 따라 접합되어 있는 웨브(33)로부터 힘이 전달되어 라이닝(31)을 고르게 마찰시키는 작용을 하는데, 요철비드부(32a)에 의해 림(32)의 변형이 견실하게 방지됨으로써 라이닝(31)이 드럼(10)과 보다 균일하게 마찰한다.At this time, the rim 32 acts to transfer the force from the web 33 joined along the central portion to evenly rub the lining 31, the deformation of the rim 32 by the uneven bead portion (32a) This reliably prevents the lining 31 from rubbing against the drum 10 more uniformly.

즉, 림(32)은 중앙부위에 길이방향으로 마련된 요철비드부(32a)를 통해 굽힘강성이 보다 증대되어 변형되지 않기 때문에, 라이닝(31) 전역에 걸쳐 균일한 힘을 전달한다. 이에 따라 라이닝(31)이 드럼(10)과 균일하게 마찰하여 제동력을 발휘함으로써 제동력이 향상되는 것은 물론이며 라이닝(31)의 편마모가 발생되지 않고 제동 소음 역시 줄어든다.That is, since the rim 32 is further increased in bending stiffness through the uneven bead portion 32a provided in the longitudinal direction at the center portion, the rim 32 transmits uniform force throughout the lining 31. Accordingly, the lining 31 is uniformly rubbed with the drum 10 to exert a braking force, so that the braking force is improved, as well as uneven wear of the lining 31 is reduced, and the braking noise is also reduced.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 브레이크슈를 갖춘 드럼 브레이크에 의하면, 단면적을 변화시켜 굽힘 강성이 증대되도록 웨브가 접합되는 림의 중앙부위를 따라 요철비드부가 길이방향으로 형성되어 있어서, 제동 작용 시 림의 폭방향 변형이 방지된다. 이에 따라 림의 단면적 변화로 굽힘 강성이 증대되어 변형이 발생되지 않고 라이닝이 드럼과 균일하게 마찰함으로써, 제동력이 향상되는 것은 물론이며 편마모 방지 및 제동 소음이 줄어드는 작용효과가 있다.As described above in detail, according to the drum brake provided with the brake shoe according to the present invention, the uneven bead portion is formed in the longitudinal direction along the central portion of the rim to which the web is joined so as to increase the bending rigidity by changing the cross-sectional area, so that braking The action prevents the lateral deformation of the rim. Accordingly, 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 rubs with the drum uniformly, thereby improving the braking force and reducing the wear resistance and reducing the braking noise.

Claims (1)

휠과 함께 회전하는 드럼과, 상기 드럼의 내주와 마찰하여 제동력을 발휘하도록 라이닝이 부착된 한 쌍의 브레이크슈와, 상기 브레이크슈 사이에 배치되어 제동유압에 의해 이들을 작동시키기 위한 휠실린더를 구비하며,A drum rotating along with the wheel, a pair of brake shoes with linings to friction with the inner circumference of the drum, and a wheel cylinder disposed between the brake shoes to operate them by braking hydraulic pressure; , 상기 브레이크슈는 외주에 상기 라이닝이 부착되는 원호형상의 림과, 상기 림의 내주 중앙부위에 길이방향으로 접합되며 단부가 상기 휠실린더와 접하도록 배치되는 웨브를 갖춘 드럼 브레이크에 있어서,The brake shoe is a drum brake having an arc-shaped rim to which the lining is attached to an outer circumference thereof, and a web joined to the inner circumferential center of the rim in a longitudinal direction and the end portion of which is in contact with the wheel cylinder. 상기 림(32)에는 단면적의 변화로 굽힘 강성이 증대되도록 상기 웨브(33)가 접합되는 중앙부위를 따라 길이방향으로 요철비드부(32a)가 형성되어, 제동 작용 시 상기 림(32)의 폭방향 변형을 방지하는 것을 특징으로 하는 브레이크슈를 갖춘 드럼 브레이크.The rim 32 has a concave-convex bead portion 32a formed in a longitudinal direction along a central portion where the web 33 is joined to increase bending stiffness due to a change in cross-sectional area, and thus, the width of the rim 32 during braking. A drum brake with a brake shoe, characterized by preventing directional deformation.
KR1020010063318A 2001-10-15 2001-10-15 Drum brake with brake shoe KR20030031606A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7847794B2 (en) 2006-10-31 2010-12-07 Hyundai Motor Company Monitor apparatus for a vehicle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5894924U (en) * 1981-12-22 1983-06-28 東京部品工業株式会社 brakes
JPS624639U (en) * 1985-06-26 1987-01-12
JP2542330Y2 (en) * 1991-03-15 1997-07-23 日信工業株式会社 Brake shoes for vehicle drum brakes
JPH10122275A (en) * 1996-10-15 1998-05-12 Isuzu Motors Ltd Brake shoe
KR19980039789U (en) * 1996-12-20 1998-09-15 양재신 Vibration-absorbing drum brakes for cars
KR0163226B1 (en) * 1995-12-27 1998-12-01 정몽원 Drum brake
JP2001074076A (en) * 1999-09-06 2001-03-23 Nissan Motor Co Ltd Drum brake device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5894924U (en) * 1981-12-22 1983-06-28 東京部品工業株式会社 brakes
JPS624639U (en) * 1985-06-26 1987-01-12
JP2542330Y2 (en) * 1991-03-15 1997-07-23 日信工業株式会社 Brake shoes for vehicle drum brakes
KR0163226B1 (en) * 1995-12-27 1998-12-01 정몽원 Drum brake
JPH10122275A (en) * 1996-10-15 1998-05-12 Isuzu Motors Ltd Brake shoe
KR19980039789U (en) * 1996-12-20 1998-09-15 양재신 Vibration-absorbing drum brakes for cars
JP2001074076A (en) * 1999-09-06 2001-03-23 Nissan Motor Co Ltd Drum brake device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7847794B2 (en) 2006-10-31 2010-12-07 Hyundai Motor Company Monitor apparatus for a vehicle

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