KR20070062253A - Drum brake for vehicle - Google Patents

Drum brake for vehicle Download PDF

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Publication number
KR20070062253A
KR20070062253A KR1020050122058A KR20050122058A KR20070062253A KR 20070062253 A KR20070062253 A KR 20070062253A KR 1020050122058 A KR1020050122058 A KR 1020050122058A KR 20050122058 A KR20050122058 A KR 20050122058A KR 20070062253 A KR20070062253 A KR 20070062253A
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KR
South Korea
Prior art keywords
web
drum
brake
vehicle
contact
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KR1020050122058A
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Korean (ko)
Inventor
정진식
Original Assignee
주식회사 만도
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Priority to KR1020050122058A priority Critical patent/KR20070062253A/en
Publication of KR20070062253A publication Critical patent/KR20070062253A/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
    • 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
    • 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

Abstract

A drum brake for a vehicle is provided to increase the contact area between a web and a piston and an anchor block of a wheel cylinder contacting the web, and to thereby easily transmit a driving force and prevent stress concentration. A drum brake for a vehicle includes a drum(1) rotated with wheels and a pair of brake shoes(21,22) disposed at inner sides of the drum. The brake shoes are manufactured by attaching a lining(3) to generate frictional force to an outer surface of a semi-circular rim(4) to correspond to the inner shape of the drum, and a web(5) is coupled with the inner surface of the lining to reinforce the rim. The webs of the brake shoes are mounted to a back plate(2) fixed to a knuckle unit of the vehicle by a coupling device(12) to reciprocate within a predetermined distance so that the webs closely contact or are separated from the inner surface of the drum. A wheel cylinder(10) is installed to generate braking force by pushing the brake shoes toward the inner surface of the drum. An anchor block(6) is installed to the lower sides of the webs to support the brake shoes.

Description

차량용 드럼 브레이크{Drum Brake for Vehicle}Drum Brake for Vehicle

도 1은 본 발명의 실시예에 따른 차량용 드럼 브레이크의 전체 모습을 보여주는 단면도이다.1 is a cross-sectional view showing the overall appearance of a vehicle drum brake according to an embodiment of the present invention.

도 2는 본 발명의 실시예에 따른 차량용 드럼 브레이크의 웨브와 피스톤이 접촉하는 모습을 나타낸 확대 단면도이다.2 is an enlarged cross-sectional view illustrating a web and piston contacting a vehicle drum brake according to an exemplary embodiment of the present invention.

도 3은 본 발명의 실시예에 따른 차량용 드럼 브레이크의 웨브와 앵커 블럭이 접촉하는 모습을 나타낸 확대 단면도이다.3 is an enlarged cross-sectional view illustrating a web and an anchor block contacting a vehicle drum brake according to an exemplary embodiment of the present invention.

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

1 : 드럼 2 : 백 플레이트1: drum 2: back plate

3 : 라이닝 4 : 림3: lining 4: rim

5 : 웨브 6 : 앵커 블록5: web 6: anchor block

7, 8 : 복원스프링 9 : 간극조절장치7, 8: restoring spring 9: gap control device

10 : 휠실린더 11 : 피스톤10 wheel cylinder 11 piston

12 : 체결장치 21, 22 : 브레이크슈12: fastening device 21, 22: brake shoes

본 발명은 차량용 드럼 브레이크에 관한 것으로, 더욱 상세하게는 드럼 브레이크 웨브 접촉부를 개선하여 응력집중현상을 해소하고 동력이 효율적으로 전달되도록 하는 드럼 브레이크에 관한 것이다.The present invention relates to a drum brake for a vehicle, and more particularly, to a drum brake that improves the drum brake web contact portion to eliminate stress concentration and to efficiently transmit power.

일반적으로 차량용 드럼브레이크는 차량의 휠과 함께 회전하는 원통형 드럼의 내면에 라이닝이 부착된 브레이크슈를 강제로 밀착시켜서 마찰력을 발생시키고, 이 마찰력을 통해 차량을 제동하는 장치이다.In general, a vehicle drum brake is a device that generates friction by forcing a brake shoe with a lining to be in close contact with an inner surface of a cylindrical drum rotating together with a wheel of the vehicle, and generates a friction force, and brakes the vehicle through the friction force.

이러한 드럼브레이크에 관한 것으로 대한민국 공개특허공보 특2002-0078016호에는 브레이크슈를 백플레이트에 장착하는 기술이 개시되어 있다. 개시된 드럼브레이크는 체결핀, 코일스프링, 와셔를 포함하는 체결장치를 통해 브레이크슈가 드럼 방향으로 진퇴 가능한 상태에서 떨림 없이 장착될 수 있도록 되어 있다.In relation to such a drum brake, Korean Laid-Open Patent Publication No. 2002-0078016 discloses a technique for mounting a brake shoe on a back plate. The disclosed drum brake is configured to be mounted without shaking while the brake shoe is retractable in the drum direction through a fastening device including a fastening pin, a coil spring, and a washer.

이 체결장치의 체결핀은 일단에 원판형 머리부가 마련되고 타단에 걸림부가 마련되어, 걸림부가 형성된 체결핀의 일단이 백플래이트와 브레이크슈의 웨브를 통과하여 결합된다. 또 코일스프링은 웨브를 통과한 체결핀에 끼워지고, 체결핀의 걸림부에 와셔가 체결됨으로써 브레이크슈의 장착이 이루어지도록 되어 있다.The fastening pin of the fastening device is provided with a disc-shaped head at one end and a catching part at the other end thereof, and one end of the fastening pin having the catching portion is coupled through the back plate and the web of the brake shoe. In addition, the coil spring is fitted to the fastening pin passing through the web, and the washer is fastened to the engaging portion of the fastening pin to mount the brake shoe.

이러한 드럼 브레이크는 웨브와 이에 접하는 휠실린더의 피스톤 및 앵커블럭의 접촉면이 점접촉 됨에 따라 응력이 웨브의 접촉부에 응력이 집중되고, 동력의 전달이 원활하게 되지 않는 문제점이 있다.The drum brake has a problem in that stress is concentrated on the contact portion of the web as the contact surface of the piston and the anchor block of the wheel cylinder contacting the web is in contact with the web, and power is not smoothly transmitted.

본 발명은 이러한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 웨브 및 이와 접하는 휠실린더의 피스톤 및 앵커블럭의 형상을 변경하여 면접촉하도록 함으로써 응력집중을 해소하고 동력전달을 개선하기 위한 것이다. The present invention is to solve this problem, an object of the present invention is to solve the stress concentration and improve the power transmission by changing the shape of the piston and the anchor block of the web and the wheel cylinder in contact with the surface.

이러한 목적을 달성하기 위한 본 발명에 의한 차량용 드럼브레이크는, 드럼의 내주면과 마찰을 통해 제동작용을 하는 복수의 브레이크슈와, 상기 드럼의 내면 형상에 대응하도록 반원형으로 마련된 림과, 상기 림의 강성을 보강하도록 상기 림의 내측을 지지하는 웨브와, 내부에 피스톤을 구비하며 상기 브레이크슈의 상부에 이들을 드럼 내면 쪽으로 밀어서 제동력을 생성시키는 휠실린더와, 상기 브레이크슈 웨브의 하단에서 브레이크슈를 지지해주는 앵커블럭을 구비한 차량용 드럼브레이크에 있어서, 상기 드럼 브레이크는 상기 휠실린더의 상기 피스톤과 상기 앵커블럭에 접하는 상기 웨브의 양단이 접촉면을 더 넓게 하기 위하여 곡선형상으로 완만하게 형성되는 것을 특징으로 한다.The vehicle drum brake according to the present invention for achieving the above object, a plurality of brake shoes for braking through friction with the inner peripheral surface of the drum, a rim provided in a semi-circular shape to correspond to the inner surface of the drum, the rigidity of the rim A web for supporting the inside of the rim to reinforce, a wheel cylinder having a piston therein, and pushing them toward the inner surface of the brake shoe to generate a braking force, and supporting the brake shoe at the bottom of the brake shoe web. In a vehicle drum brake provided with an anchor block, the drum brake is characterized in that the piston of the wheel cylinder and both ends of the web in contact with the anchor block are smoothly formed in a curved shape to make the contact surface wider.

또한, 웨브의 일단과 접하는 상기 휠실린더의 상기 피스톤은 상기 웨브와의 접촉부위가 상기 웨브의 곡선형상과 맞물리는 곡선형상으로 형성되는 것을 특징으로 한다.In addition, the piston of the wheel cylinder in contact with one end of the web is characterized in that the contact portion with the web is formed in a curved shape to mesh with the curved shape of the web.

또한, 웨브의 일단과 접하는 상기 앵커블럭은 상기 웨브와의 접촉부위가 상기 웨브의 곡선형상과 맞물리는 곡선형상으로 형성되는 것을 특징으로 한다.In addition, the anchor block in contact with one end of the web is characterized in that the contact portion with the web is formed in a curved shape to mesh with the curved shape of the web.

이하, 본 발명에 따른 하나의 바람직한 실시예를 첨부도면을 참조하여 상세히 설명한다. 본 발명에 따른 차량용 드럼브레이크는 도 1에 도시한 바와 같이, 차륜과 함께 회전하는 드럼(1)과, 드럼(1)의 내면 양측에 배치된 한 쌍의 브레이크슈(21,22)를 구비한다. 브레이크슈(21,22)는 드럼(1)의 내면 형상에 대응하도록 반원 형으로 마련된 림(4)의 외면에 마찰력을 발생시키는 라이닝(3)이 부착된 구조로 마련되고, 라이닝(3)의 내면에는 림(4)의 강성을 보강하도록 지지하는 웨브(5)가 결합된다. 이때 두 브레이크슈(21,22)의 웨브(5)는 체결장치(12)를 통해 차량의 너클부(미도시)에 고정된 백플레이트(2)에 소정구간 진퇴 가능한 상태로 장착되어, 드럼(1)의 내면에 밀착되거나 이격될 수 있도록 구성된다. Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, a vehicle drum brake according to the present invention includes a drum 1 rotating together with a wheel, and a pair of brake shoes 21 and 22 disposed on both sides of an inner surface of the drum 1. . The brake shoes 21 and 22 have a structure in which a lining 3 is attached to the outer surface of the rim 4 provided in a semicircular shape so as to correspond to the inner surface shape of the drum 1, and the lining 3 is The inner surface is coupled to the web (5) for supporting to reinforce the rigidity of the rim (4). At this time, the web 5 of the two brake shoes (21, 22) is mounted on the back plate (2) fixed to the knuckle portion (not shown) of the vehicle through the fastening device 12 in a state capable of advancing a predetermined section, the drum ( It is configured to be in close contact with the inner surface of 1) or spaced apart.

또 두 브레이크슈(21,22)의 상부에는 이들을 드럼(1)의 내면 쪽으로 밀어서 제동력을 생성시키는 휠실린더(10)가 설치되고, 두 브레이크슈(21,22)의 웨브(5) 하단에는 백플레이트(2)에 고정된 상태에서 두 브레이크슈(21,22)의 하부를 지지해주는 앵커블럭(6)이 설치된다. 또한 두 브레이크슈(21,22) 사이에는 이들을 상호 지지하도록 된 간극조절장치(9)가 설치된다. In addition, wheel cylinders 10 are provided on the upper portions of the two brake shoes 21 and 22 to generate braking force by pushing them toward the inner surface of the drum 1, and on the lower ends of the webs 5 of the two brake shoes 21 and 22, respectively. An anchor block 6 supporting lower portions of the two brake shoes 21 and 22 in a state of being fixed to the plate 2 is installed. In addition, a gap adjusting device 9 is installed between the two brake shoes 21 and 22 so as to support them mutually.

간극조절장치(9)는 두 브레이크슈(21,22)에 부착된 라이닝(3)의 마모에 따라 회동 가능하게 장착된 조절레버(9a)가 상하로 회동하면서 조절너트(9b)를 조여 주어 간극조절장치(9)의 길이가 신장되도록 함으로써 드럼(1)의 내면과 라이닝(3)의 외면 사이의 간극이 자동 조절되도록 한 것이다. 부호 7과 8은 제동동작의 해제시 두 브레이크슈(21,22)를 복원시키는 복원스프링이다.The gap adjusting device 9 tightens the adjusting nut 9b while the control lever 9a rotatably mounted up and down rotates according to the wear of the lining 3 attached to the two brake shoes 21 and 22. The length of the adjusting device 9 is extended so that the gap between the inner surface of the drum 1 and the outer surface of the lining 3 is automatically adjusted. Reference numerals 7 and 8 denote restoration springs for restoring the two brake shoes 21 and 22 when the braking operation is released.

도 2는 본 발명의 실시예에 따른 차량용 드럼 브레이크의 웨브와 피스톤이 접촉하는 모습을 나타낸 확대 단면도이다. 웨브(5)의 상부 측 단부는 휠실린더(14)의 내부에 구비되는 피스톤(15)과 접하여 브레이크슈(21, 22)를 양측 외부로 밀게 된다. 종래에는 이러한 웨브(5)의 단부와 피스톤(10)의 접접이 점접촉에 불과하여 그 점에 응력이 집중되고 브레이크슈를 미는 동력의 전달도 원활하지 못하였다. 2 is an enlarged cross-sectional view illustrating a web and piston contacting a vehicle drum brake according to an exemplary embodiment of the present invention. The upper end portion of the web 5 is in contact with the piston 15 provided inside the wheel cylinder 14 to push the brake shoes 21 and 22 to both sides. Conventionally, the contact of the end of the web 5 and the piston 10 is only a point contact, so the stress is concentrated at that point and the transmission of the power to push the brake shoe is not smooth.

본 발명의 실시예에 따른 웨브(5)와 피스톤(10)의 접점은 웨브(5)가 돌출되는 곡선형상으로 구비되고, 피스톤(10)의 접하는 부위가 최대한 넓은 접촉면적을 가질 수 있도록 이에 부합하는 오목한 곡선형상으로 형성된다.The contact point of the web 5 and the piston 10 according to the embodiment of the present invention is provided in a curved shape in which the web 5 protrudes, so that the contact portion of the piston 10 can have a wide contact area as much as possible. It is formed in a concave curved shape.

도 3은 본 발명의 실시예에 따른 차량용 드럼 브레이크의 웨브와 앵커 블럭이 접촉하는 모습을 나타낸 확대 단면도이다. 웨브(5)의 하단부와 이에 접하는 앵커블럭(6)의 경우에도 전술한 바와 같이 서로 부합되는 요철형상의 곡선부를 형성하여 최대한의 접촉면적을 가지도록 한다. 이러한 요철부는 본 발명의 실시예에서는 웨브(5)의 단부가 볼록하게 구비되고 이에 접하는 부재들의 단부가 오목하게 구비되나 이는 반대로 되어도 무관하다.3 is an enlarged cross-sectional view illustrating a web and an anchor block contacting a vehicle drum brake according to an exemplary embodiment of the present invention. In the case of the lower end of the web 5 and the anchor block 6 in contact therewith, as described above, the curved portions of the concave-convex shapes that match each other are formed to have the maximum contact area. In the embodiment of the present invention, the concave-convex portion is provided with convex ends and concave ends of the members in contact with the concave portion, but this may be reversed.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 차량용 드럼브레이크는 웨브와 이에 접하는 휠실린더의 피스톤 및 앵커 블록의 접촉 면적을 증가시켜 동력의 전달을 원활하게 하고 응력집중을 해소할 수 있는 효과가 있다.As described in detail above, the vehicle drum brake according to the present invention increases the contact area between the web and the piston and anchor block of the wheel cylinder in contact with the web, thereby facilitating the transmission of power and relieving stress concentration.

Claims (3)

드럼의 내주면과 마찰을 통해 제동작용을 하는 복수의 브레이크슈와, 상기 드럼의 내면 형상에 대응하도록 반원형으로 마련된 림과, 상기 림의 강성을 보강하도록 상기 림의 내측을 지지하는 웨브와, 내부에 피스톤을 구비하며 상기 브레이크슈의 상부에 이들을 드럼 내면 쪽으로 밀어서 제동력을 생성시키는 휠실린더와, 상기 브레이크슈 웨브의 하단에서 브레이크슈를 지지해주는 앵커블럭을 구비한 차량용 드럼브레이크에 있어서, 상기 드럼 브레이크는 상기 휠실린더의 상기 피스톤과 상기 앵커블럭에 접하는 상기 웨브의 양단이 접촉면을 더 넓게 하기 위하여 곡선형상으로 완만하게 형성되는 것을 특징으로 하는 차량용 드럼 브레이크. A plurality of brake shoes braking through friction with the inner circumferential surface of the drum, a rim provided in a semicircular shape to correspond to the inner surface of the drum, a web supporting the inside of the rim to reinforce the rigidity of the rim, and In a vehicle drum brake having a piston having a piston on the upper side of the brake shoe to generate a braking force by pushing them toward the inner surface of the brake, and an anchor block for supporting the brake shoe at the lower end of the brake shoe web, the drum brake is Both ends of the piston of the wheel cylinder and the web in contact with the anchor block is gently formed in a curved shape to make the contact surface wider. 제1항에 있어서, 상기 웨브의 일단과 접하는 상기 휠실린더의 상기 피스톤은 상기 웨브와의 접촉부위가 상기 웨브의 곡선형상과 맞물리는 곡선형상으로 형성되는 것을 특징으로 하는 차량용 드럼 브레이크.The vehicle drum brake according to claim 1, wherein the piston of the wheel cylinder in contact with one end of the web is formed in a curved shape in which a contact portion with the web is engaged with a curved shape of the web. 제1항에 있어서, 상기 웨브의 일단과 접하는 상기 앵커블럭은 상기 웨브와의 접촉부위가 상기 웨브의 곡선형상과 맞물리는 곡선형상으로 형성되는 것을 특징으로 하는 차량용 드럼 브레이크.The vehicle brake of claim 1, wherein the anchor block in contact with one end of the web is formed in a curved shape in which a contact portion with the web is engaged with a curved shape of the web.
KR1020050122058A 2005-12-12 2005-12-12 Drum brake for vehicle KR20070062253A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104565130A (en) * 2015-01-23 2015-04-29 李邦华 Motor vehicle and cam-type pushing force brake apparatus of electric vehicle
CN105202070A (en) * 2015-10-27 2015-12-30 钦州学院 Dual-hydraulic drum type braking device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104565130A (en) * 2015-01-23 2015-04-29 李邦华 Motor vehicle and cam-type pushing force brake apparatus of electric vehicle
CN105202070A (en) * 2015-10-27 2015-12-30 钦州学院 Dual-hydraulic drum type braking device

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