KR20130036388A - Drum brake - Google Patents

Drum brake Download PDF

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Publication number
KR20130036388A
KR20130036388A KR1020110100428A KR20110100428A KR20130036388A KR 20130036388 A KR20130036388 A KR 20130036388A KR 1020110100428 A KR1020110100428 A KR 1020110100428A KR 20110100428 A KR20110100428 A KR 20110100428A KR 20130036388 A KR20130036388 A KR 20130036388A
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KR
South Korea
Prior art keywords
brake
shoe
drum
piston
wheel cylinder
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Application number
KR1020110100428A
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Korean (ko)
Inventor
성민욱
Original Assignee
주식회사 만도
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Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020110100428A priority Critical patent/KR20130036388A/en
Publication of KR20130036388A publication Critical patent/KR20130036388A/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
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum 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
    • 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
    • F16D51/22—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 mechanically 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • F16D2125/48—Rotating members in mutual engagement with parallel stationary axes, e.g. spur gears
    • 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
    • F16D2127/00—Auxiliary mechanisms
    • F16D2127/02—Release mechanisms

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

Abstract

PURPOSE: A drum brake is provided to generate even braking power on a pair of brake shoes by connecting a piston of a wheel cylinder with a gear assembly. CONSTITUTION: A drum brake comprises a back plate(10), a drum, a brake shoe, a wheel cylinder, and reconstruction springs. The back plate is connected to a vehicle body. The drum is prepared to be opposed to the back plate and rotates with a wheel. The brake shoe comprises a primary shoe and a secondary shoe in which linings are attached. A piston operating the brake shoe with an external force is included in the wheel cylinder. The wheel cylinder operates the piston with a motor and a gear assembly. The reconstruction springs return the brake shoe when releasing a brake.

Description

드럼 브레이크{DRUM BRAKE}Drum Brake {DRUM BRAKE}

본 발명은 드럼 브레이크에 관한 것으로, 더욱 상세하게는 한 쌍의 브레이크슈에 균일한 제동력이 발생할 수 있도록 하는 드럼 브레이크에 관한 것이다.The present invention relates to a drum brake, and more particularly, to a drum brake to allow a uniform braking force to be generated in a pair of brake shoes.

일반적으로 휠과 함께 회전하는 드럼과 마찰하여 제동력을 발생하는 드럼 브레이크는 유압을 이용하거나, 주차 브레이크 레버와 연계된 케이블을 이용하여 라이닝이 부착된 브레이크슈를 드럼과 마찰시켜 제동력을 얻도록 하는 장치이다. 또한 드럼 브레이크는 승용차의 파킹 브레이크로 사용되는 경우, 유압에 의한 후륜 제동용으로 디스크브레이크와 한 조를 이루어 사용되는데, 이와 같은 종류의 것을 D.I.H(Drum In Hat)라 한다.Generally, a drum brake that generates a braking force by friction with a drum rotating with a wheel uses hydraulic pressure or a cable connected with a parking brake lever to frictionally brake a brake shoe with a lining to a drum to obtain a braking force. to be. In addition, when the drum brake is used as a parking brake of a passenger car, it is used in combination with a disc brake for rear wheel braking by hydraulic pressure. This type is referred to as D.I.H (Drum In Hat).

종래의 드럼 브레이크는 차체에 체결되는 휠과 함께 회전하는 드럼과, 백플레이트에 고정된 앵커블록에 하단이 접촉 지지된 호 형상의 한 쌍의 브레이크슈와, 한 쌍의 브레이크슈 상단 사이에 설치되며 제동 유압을 전달받아 브레이크슈를 외향 작동시키는 피스톤이 내장된 휠실린더 등으로 이루어진다. 따라서 휠실린더에 유압이 전달되어 피스톤이 전진하면, 두 브레이크슈는 하단이 지지되어 있는 앵커블록을 중심으로 바깥쪽으로 회전하며 드럼과 마찰하여 제동력을 발생시킨다. 한 쌍의 브레이크슈는 앵커블록을 중심으로 드럼의 전진 회전방향 측에 배치된 것을 프라이머리슈, 그 반대쪽에 배치된 것을 세컨더리슈라 하여 구별한다. Conventional drum brakes are installed between a drum rotating together with a wheel fastened to a vehicle body, a pair of arc-shaped brake shoes having a lower end contacted and supported by an anchor block fixed to a back plate, and a pair of upper brake shoes. It is composed of a wheel cylinder with a built-in piston for braking hydraulic pressure is applied outward. Therefore, when hydraulic pressure is transmitted to the wheel cylinder and the piston moves forward, the two brake shoes rotate outward with respect to the anchor block on which the lower end is supported, and friction with the drum generates the braking force. The pair of brake shoes are distinguished as the primary shoe and the second shoe arranged on the side of the drum in the forward rotation direction with respect to the anchor block.

그런데, 종래의 드럼 브레이크는 제동력 발생 시 프라이머리슈에는 드럼의 전진 회전방향을 따라가려는 힘과 앵커블록에 의해 브레이크슈가 확장되려고 하는 힘이 작용하여 제동력이 증가되는 데 반하여, 세컨더리슈에는 역으로 회전에 대해 브레이크슈를 드럼으로부터 분리하려는 힘이 작용하여 제동력이 저감되는 단점이 있었다. However, in the conventional drum brake, when the braking force is generated, the braking force is increased by the force to follow the forward rotation direction of the drum to the primary shoe and the brake shoe to be extended by the anchor block, whereas the braking force is increased. There is a disadvantage in that the braking force is reduced by the force to separate the brake shoe from the drum.

본 발명은 상술한 종래 기술에 착안한 것으로서, 본 발명의 목적은 한 쌍의 브레이크슈에 제동력이 균일하게 발생할 수 있도록 한 드럼 브레이크를 제공하는 데 있다.The present invention has been made in view of the above-described prior art, and an object of the present invention is to provide a drum brake in which a braking force can be generated uniformly on a pair of brake shoes.

상기 목적을 달성하기 위한 본 발명에 따른 드럼 브레이크는 차량의 차체에 결합되는 백플레이트와, 백플레이트에 대항되게 마련되어 휠과 함께 회전하는 드럼과, 드럼의 내주면과 접촉하여 제동작용을 하도록 라이닝이 부착된 프라이머리슈와 세컨더리슈를 포함하는 브레이크슈와, 외력에 의해 브레이크슈를 외향 작동시키는 피스톤이 내장된 휠실린더와, 제동 해제 시 브레이크슈를 복귀시키기 위한 복원스프링를 포함하는 드럼 브레이크에 있어서, 휠실린더는 모터와 기어어셈블리에 의해 피스톤을 동작시킨다. The drum brake according to the present invention for achieving the above object is a back plate coupled to the vehicle body of the vehicle, a drum provided against the back plate to rotate with the wheel, the lining is attached to the braking action in contact with the inner peripheral surface of the drum A drum brake comprising a brake shoe comprising a primary and secondary shoe, a wheel cylinder with a piston for activating the brake shoe outwardly by an external force, and a restoring spring for returning the brake shoe when the brake is released. The cylinder drives the piston by the motor and gear assembly.

또한, 본 발명에 따른 드럼 브레이크의 상기 휠실린더는 백플레이트의 전방에 마련되는 작동부와 후방에 마련되는 구동부를 포함하되, 작동부는 프라이머리슈와 세컨더리슈 사이에 설치되며 제동력이 발생되면 각 브레이크슈를 외측으로 밀기 위한 피스톤과, 피스톤과 연장 설치된 인너스핀들과 구동부와 밸트로 연결된 아웃터스핀들로 이루어지며 회전 운동을 직선 왕복 운동으로 전환하는 스핀들을 포함하고, 구동부는 모터와, 모터의 회전축에 연설되며 아웃터스핀들과 밸트로 연결된 기어어셈블리를 포함한다. In addition, the wheel cylinder of the drum brake according to the present invention includes an operating part provided in the front of the back plate and a driving part provided in the rear, the operating part is installed between the primary shoe and the secondary shoe and each brake when a braking force is generated It consists of a piston for pushing the shoe outward, an inner pin extended with the piston, and an outer pin connected to the driving portion and the belt, and including a spindle for converting the rotational movement into a linear reciprocating movement, the driving portion speaking to the motor and the rotating shaft of the motor. It includes a gear assembly connected to the outer spindle and the belt.

본 발명에 따른 드럼 브레이크는 휠실린더의 피스톤이 기어어셈블리로 연결 구동됨으로써 한 쌍의 브레이크슈에 균일한 제동력이 발생되도록 하는 효과가 있다.The drum brake according to the present invention has the effect of generating a uniform braking force on the pair of brake shoes by driving the piston of the wheel cylinder connected to the gear assembly.

도 1은 본 발명의 일 실시예에 따른 드럼 브레이크의 전면을 도시한 사시도이다.
도 2는 발명의 일 실시예에 따른 드럼 브레이크의 후면을 도시한 사시도이다.
도 3은 발명의 일 실시예에 따른 드럼 브레이크의 휠실린더를 확대 도시한 단면도이다.
도 4는 발명의 일 실시예에 따른 드럼 브레이크의 휠실린더 내부를 도시한 도면이다.1 is a perspective view showing a front surface of a drum brake according to an embodiment of the present invention.
2 is a perspective view illustrating a rear surface of a drum brake according to an embodiment of the present invention.
3 is an enlarged cross-sectional view of a wheel cylinder of a drum brake according to an exemplary embodiment of the present invention.
4 is a view showing the inside of the wheel cylinder of the drum brake according to an embodiment of the present invention.

이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 일 실시예에 따른 드럼 브레이크는 도 1에서 도시한 바와 같이, 차체에 결합되는 백플레이트(10)와, 백플레이트(10)의 전면측에 설치되며 휠과 함께 회전하는 드럼(미도시)과 마찰을 함으로써 제동력을 발휘하는 한 쌍의 브레이크슈(20a,20b)와, 한 쌍의 브레이크슈(20a,20b) 사이에 설치되며 외력(제동력)을 전달받아 브레이크슈를 외향 작동시키는 피스톤이 내장된 휠실린더(60)를 포함한다. Drum brake according to an embodiment of the present invention, as shown in Figure 1, the back plate 10 is coupled to the vehicle body, the drum which is installed on the front side of the back plate 10 and rotates with the wheel (not shown) ) And a pair of brake shoes (20a, 20b) exerting a braking force by friction with a) and a pair of brake shoes (20a, 20b) and a piston that operates the brake shoes outward by receiving an external force (braking force) It includes a built-in wheel cylinder 60.

한 쌍의 브레이크슈(20a,20b)는 호 형상으로 마련되며 하단의 앵커핀(30)을 중심으로 드럼(10)의 전진 회전방향 측에 배치된 프라이머리슈(20a)와, 그 반대쪽에 배치된 세컨더리슈(20b)를 포함한다. 두 브레이크슈(20a,20b)는 라이닝(30a,30b)이 부착되는 반원형상의 림(40a,40b)과, 림(40a,40b)의 내주면에 결합되어 림(40a,40b)을 지지하는 웨브(50a,50b)를 구비한다. The pair of brake shoes 20a and 20b are formed in an arc shape and are arranged on the opposite side of the primary shoe 20a disposed on the side of the forward rotation direction of the drum 10 about the anchor pin 30 at the lower end thereof, and on the opposite side thereof. Secondary shoe 20b is included. The two brake shoes 20a and 20b are coupled to the semicircular rims 40a and 40b to which the linings 30a and 30b are attached and the inner circumferential surfaces of the rims 40a and 40b to support the rims 40a and 40b. 50a, 50b).

프라이머리슈(20a)의 웨브(50a) 일단과 세컨더리슈(20b)의 웨브(50b) 일단 사이에는 제동 작동 중 두 브레이크슈(20a,20b)가 분리되지 않도록 지지하는 앵커핀(30)이 마련된다. 앵커핀(30)을 중심으로 복원스프링(35)이 두 브레이크슈(20a,20b)의 웨브(50a,50b)에 고정되며, 이러한 복원스프링(35,37)은 제동 작동의 해제 시 두 브레이크슈(20a,20b)를 복원시키는 역할을 한다.An anchor pin 30 is provided between one end of the web 50a of the primary shoe 20a and one end of the web 50b of the secondary shoe 20b to prevent the two brake shoes 20a and 20b from being separated during the braking operation. do. The restoring spring 35 is fixed to the webs 50a and 50b of the two brake shoes 20a and 20b around the anchor pin 30, and the restoring springs 35 and 37 are two brake shoes upon release of the braking operation. It serves to restore (20a, 20b).

프라이머리슈(20a)의 웨브(50a) 타단과 세컨더리슈(20b)의 웨브(50b) 타단 사이에는 브레이크슈(20a,20b)를 외향 작동시켜 라이닝(30a,30b)이 드럼에 밀착하여 제동력이 발생하도록 하는 휠실린더(60)가 설치된다. Between the other end of the web 50a of the primary shoe 20a and the other end of the web 50b of the secondary shoe 20b, the brake shoes 20a and 20b are operated outward so that the linings 30a and 30b are in close contact with the drum, Wheel cylinder 60 to be generated is installed.

휠실린더(60)는 드럼 브레이크의 전방에 마련되는 작동부(60a)와 후방에 마련되는 구동부(60b)를 포함한다. 작동부(60a)는 박스 형상으로 마련되어 프라이머리슈(20a)와 세컨더리슈(20b) 사이에 설치되며, 제동력이 발생되면 각 브레이크슈(20a,20b)를 외측으로 밀기 위한 피스톤(61a,61b)과, 회전 운동을 직선 왕복 운동으로 전환하는 스핀들(62a,62b)을 포함한다. 스핀들은 아웃터스핀들(62a)과 인너스핀들(62b)로 이루어진다. 아웃터스핀들(62a)은 후술할 구동부(60b)와 밸트(63)로 연결되며, 인너스핀들(62b)은 각 피스톤(61a,61b)과 동축 상에 연장 설치된다.The wheel cylinder 60 includes an operation unit 60a provided at the front of the drum brake and a drive unit 60b provided at the rear. The operation part 60a is provided in a box shape and is installed between the primary shoe 20a and the secondary shoe 20b, and when the braking force is generated, the pistons 61a and 61b for pushing the brake shoes 20a and 20b outward. And spindles 62a and 62b for converting rotational movements into linear reciprocating motions. The spindle consists of outer spines 62a and inner spins 62b. The outer pins 62a are connected to the driving unit 60b and the belt 63 to be described later, and the inner pins 62b are coaxially installed with the respective pistons 61a and 61b.

구동부(60b)는 모터(64)와, 이 모터(64)의 회전축에 연설되는 기어어셈블리(65a,65b,65c)를 포함한다. 기어어셈블리는 메인기어(65a)의 주위에 복수의 위성기어(65b,65c)를 연결한 감속기어 형태를 갖는다. 위성기어(65c)와 아웃터스핀들(62a)은 밸트(63)로 연결된다.The drive part 60b includes the motor 64 and the gear assemblies 65a, 65b, 65c which are extended to the rotating shaft of this motor 64. As shown in FIG. The gear assembly has a form of a reduction gear in which a plurality of satellite gears 65b and 65c are connected around the main gear 65a. The satellite gear 65c and the outer spines 62a are connected to the belt 63.

상기와 같이 구성된 드럼 브레이크는 외부로부터 제동력이 발생되면, 모터(64)가 동작하면서 기어어셈블리(65a,65b,65c)를 회전시키고, 기어어셈블리(65a,65b,65c)는 밸트(63)로 연결된 아웃터스핀들(62a)을 회전시키며, 아웃터스핀들(62a)은 인너스핀들(62b)을 통해 피스톤(61a,61b)을 직선 이동시킨다. 피스톤(61a,62b)은 두 브레이크슈(20a,20b)의 상단을 외측으로 밀며, 이때 브레이크슈(20a,20b)의 하단은 앵커블록(30)에 지지되어 있으므로, 브레이크슈(20a,20b)는 앵커블록(30)을 중심으로 회전하면서 드럼(D)과 마찰하여 제동이 이루어진다. The drum brake configured as described above rotates the gear assemblies 65a, 65b and 65c while the motor 64 operates while the braking force is generated from the outside, and the gear assemblies 65a, 65b and 65c are connected to the belt 63. The outer pins 62a are rotated, and the outer pins 62a linearly move the pistons 61a and 61b through the inner pins 62b. The pistons 61a and 62b push the upper ends of the two brake shoes 20a and 20b to the outside. At this time, the lower ends of the brake shoes 20a and 20b are supported by the anchor block 30 and thus the brake shoes 20a and 20b. The brake is made by friction with the drum (D) while rotating around the anchor block (30).

10..백플레이트 20a,20b..브레이크슈
30a,30b..라이닝 30..앵커핀
35,37..복원스프링 50a,50b..웨브
60..휠스프링 60a..작동부
60b..구동부 61a,61b..피스톤
62a/62b..아웃터스핀들/인너스핀들 63..밸트
64..모터 65a,65b,65c..기어어셈블리10. Backplate 20a, 20b .. Brake shoe
30a, 30b lining 30 anchor pin
35,37..Spring spring 50a, 50b ..
60 .. Wheel spring 60a.
60b.Drive part 61a, 61b .. Piston
62a / 62b.Outer Spindles / Inner Spindles 63.Ballets
64.Motor 65a, 65b, 65c.Gear assembly

Claims (2)

차량의 차체에 결합되는 백플레이트와, 상기 백플레이트에 대항되게 마련되어 휠과 함께 회전하는 드럼과, 상기 드럼의 내주면과 접촉하여 제동작용을 하도록 라이닝이 부착된 프라이머리슈와 세컨더리슈를 포함하는 브레이크슈와, 외력에 의해 브레이크슈를 외향 작동시키는 피스톤이 내장된 휠실린더와, 제동 해제 시 브레이크슈를 복귀시키기 위한 복원스프링를 포함하는 드럼 브레이크에 있어서,
상기 휠실린더는 모터와 기어어셈블리에 의해 피스톤을 동작시키는 것을 특징으로 하는 드럼 브레이크.A brake including a back plate coupled to a vehicle body, a drum provided against the back plate and rotating with a wheel, and a primary shoe and a secondary shoe with linings attached to the inner circumferential surface of the drum for braking action. In a drum brake comprising a shoe, a wheel cylinder with a piston for operating the brake shoe outwardly by an external force, and a restoring spring for returning the brake shoe when the brake is released.
The wheel cylinder is a drum brake, characterized in that for operating the piston by the motor and gear assembly. 제 1항에 있어서,
상기 휠실린더는 백플레이트의 전방에 마련되는 작동부와 후방에 마련되는 구동부를 포함하되,
작동부는 프라이머리슈와 세컨더리슈 사이에 설치되며 제동력이 발생되면 각 브레이크슈를 외측으로 밀기 위한 피스톤과, 피스톤과 연장 설치된 인너스핀들과 구동부와 밸트로 연결된 아웃터스핀들로 이루어지며 회전 운동을 직선 왕복 운동으로 전환하는 스핀들을 포함하고,
구동부는 모터와, 모터의 회전축에 연설되며 아웃터스핀들과 밸트로 연결된 기어어셈블리를 포함하는 것을 특징으로 하는 드럼 브레이크.The method of claim 1,
The wheel cylinder includes an operation unit provided in the front of the back plate and a drive unit provided in the rear,
The operating part is installed between the primary shoe and the secondary shoe, and when the braking force is generated, it consists of a piston for pushing each brake shoe outward, inner pins extending with the piston, and outer pins connected to the driving part and the belt. Includes a spindle to switch to,
The drive unit comprises a motor, a gear assembly that is addressed to the rotation axis of the motor and connected to the outer spindle and the belt.
KR1020110100428A 2011-10-04 2011-10-04 Drum brake KR20130036388A (en)

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