KR101229763B1 - Dual mass flywheel for vehicle - Google Patents

Dual mass flywheel for vehicle Download PDF

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Publication number
KR101229763B1
KR101229763B1 KR1020060044897A KR20060044897A KR101229763B1 KR 101229763 B1 KR101229763 B1 KR 101229763B1 KR 1020060044897 A KR1020060044897 A KR 1020060044897A KR 20060044897 A KR20060044897 A KR 20060044897A KR 101229763 B1 KR101229763 B1 KR 101229763B1
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South Korea
Prior art keywords
flywheel
type
damper means
dual mass
flange
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KR1020060044897A
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Korean (ko)
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KR20070111737A (en
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김병기
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현대자동차주식회사
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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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/13107—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses for damping of axial or radial, i.e. non-torsional vibrations
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/13142—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses characterised by the method of assembly, production or treatment
    • 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
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/60—Clutching elements
    • F16D13/64—Clutch-plates; Clutch-lamellae

Abstract

본 발명은 차량용 듀얼 매스 플라이휠에 관한 것이며, 상세하게는 듀얼 매스 플라이휠의 댐퍼수단의 개량에 관한 것으로서, 댐퍼수단의 스프링상수를 항상 일정하게 유지할 수 있도록 한 것이다.The present invention relates to a dual mass flywheel for a vehicle, and more particularly, to an improvement of a damper means of a dual mass flywheel, so that the spring constant of the damper means can be kept constant at all times.

본 발명은 중심에 허브(13)를 설치한 1차 플라이휠(11)과, 상기 허브(13)에 중심을 지지한 2차 플라이휠(12)과, 상기 2차 플라이휠(12)에 플랜지(15)를 설치하여 상기 플랜지(15)의 양측과 상기 1차 플라이휠(11)의 외주위 내면에 지지되는 댐퍼수단(30a)(30b)을 구비한 것에 있어서, 상기 댐퍼수단(30a)(30b)은 x형 제 1 및 제 2 단위부재(31)(41) 다수조를 자유단끼리 상호 연결하여 호상으로 형성하고, 상기 x형 제 1 및 제 2 단위부재(31)(41)의 외측 자유단 연결부에 롤러(35a)(35b)를 설치하여 상기 롤러(35a)(35b)가 1차 플라이휠(11)의 외주위 내면에 롤링 접촉되게 한 것이다.According to the present invention, a primary flywheel (11) having a hub (13) installed at its center, a secondary flywheel (12) supporting a center at the hub (13), and a flange (15) at the secondary flywheel (12). And damper means 30a and 30b supported on both sides of the flange 15 and the outer peripheral inner surface of the primary flywheel 11, wherein the damper means 30a and 30b are x. A plurality of mold first and second unit members 31 and 41 are connected to each other by free ends to form an arc, and the outer free end connection portions of the x-type first and second unit members 31 and 41 are formed in an arc shape. The rollers 35a and 35b are installed so that the rollers 35a and 35b are in rolling contact with the inner circumferential surface of the primary flywheel 11.

1차 플라이휠, 2차 플라이휠, 플랜지, 댐퍼수단, x형 제 1 단위부재, 롤러, x형 제 2 단위부재 Primary flywheel, secondary flywheel, flange, damper means, x type first unit member, roller, x type second unit member

Description

차량용 듀얼 매스 플라이휠 {DUAL MASS FLYWHEEL FOR VEHICLE}Dual Mass Flywheels for Vehicles {DUAL MASS FLYWHEEL FOR VEHICLE}

도 1은 종래의 것의 일부절단 평면도1 is a partially cutaway plan view of a conventional one

도 2는 도 1의 A-A 선 단면도2 is a cross-sectional view taken along the line A-A of FIG.

도 3은 본 발명의 실시예의 일부절결 평면도Figure 3 is a partially cutaway plan view of an embodiment of the present invention

도 4는 도 3의 B-B 선 단면도4 is a cross-sectional view taken along the line B-B of FIG.

도 5는 본 발명의 실시예의 댐퍼수단의 1조의 분해 사시도5 is an exploded perspective view of a set of damper means in an embodiment of the present invention;

도 6a, 6b는 본 발명의 실시예의 작용 상태도Figure 6a, 6b is an operational state diagram of an embodiment of the present invention

< 도면의 주요부분에 대한 부호설명 >       <Explanation of Signs of Major Parts of Drawings>

11 : 1차 플라이휠 12 : 2차 플라이휠 15 : 플랜지11: primary flywheel 12: secondary flywheel 15: flange

30a,30b : 댐퍼수단 31 : x형 제 1 단위부재30a, 30b: damper means 31: x type first unit member

35a,35b : 롤러 41 : x형 제 2 단위부재35a, 35b: roller 41: x type second unit member

본 발명은 차량용 듀얼 매스 플라이휠(Dual Mass Flywheel)에 관한 것이며, 상세하게는 듀얼 매스 플라이휠의 댐퍼수단의 개량에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual mass flywheel for a vehicle, and more particularly to an improvement in the damper means of a dual mass flywheel.

주지하는 바와 같이, 엔진의 크랭크 샤프트에서 발생하는 비틀림 진동을 방 지하기 위하여 엔진과 트랜스 밋숀 사이에 플라이휠을 설치하며, 최근에는 소음(Noise, Vibration, Hastiness, N.V.H)감쇠 측면에서 넓은 댐핑영역을 가지는 듀얼 매스 플라이휠의 사용이 점점 증가하고 있다.As is well known, a flywheel is installed between the engine and the transmission mist to prevent torsional vibrations occurring in the crankshaft of the engine, and recently has a large damping area in terms of noise (Vise, Vibration, Hastiness, NVH) attenuation. The use of dual mass flywheels is increasing.

상기 듀얼 매스 플라이휠은 도 1 및 도 2에 도시한 바와 같이, 플라이휠(10)을 1차 플라이휠(11)과 2차 플라이휠(12)로 구분 형성하여 1차 플라이휠(11)은 허브(13)로서 크랭크 샤프트에 고정하고, 2차 플라이휠(12)은 그 중심을 상기 허브(13)에 부시(14)로 지지하여 트랜스 밋숀의 입력축이 클러치를 통하여 단속되도록 한 것이다.As shown in FIGS. 1 and 2, the dual mass flywheel divides the flywheel 10 into a primary flywheel 11 and a secondary flywheel 12 so that the primary flywheel 11 serves as a hub 13. Fixed to the crankshaft, the secondary flywheel 12 supports the center of the hub 13 with the bush 14 so that the input shaft of the transmission can be interrupted through the clutch.

그리고 2차 플라이휠(12)에는 플랜지(15)를 설치하고, 상기 플랜지(15)의 양측에 댐퍼수단(16a)(16b)을 상기 1차 플라이휠(11)의 외주위 내면에 지지되게 설치하며, 상기 댐퍼수단(16a)(16b)은 호상 외부 코일 스프링(17)의 내부에 상기 호상 외부 코일 스프링(17)보다 직경이 작은 내부 코일 스프링(18)을 끼워 넣은 것이다.And the secondary flywheel 12 is provided with a flange 15, the damper means (16a, 16b) on both sides of the flange 15 is installed to be supported on the inner peripheral surface of the primary flywheel (11), The damper means 16a and 16b fit an inner coil spring 18 having a smaller diameter than the arc shaped outer coil spring 17 in the arc shaped outer coil spring 17.

미설명부호 19는 커버이고, 20은 링기어이다.Reference numeral 19 is a cover and 20 is a ring gear.

상기한 듀얼 매스 플라이휠은 크랭크 샤프트의 회전력이 그 토크가 변경되면서 1차 플라이휠(11)에 전달될 때 1차 플라이휠(11)과 2차 플라이휠(12) 사이의 상대 회전속도차에 의하여 플랜지(15)가 시계 또는 반시계방향으로 회전함에 따라 댐퍼수단(16a)(16b)이 인장 압축됨으로써 진동을 감쇠하며, 상기와 같이 댐퍼수단(16a)(16b)에서 진동이 감쇠될 때 플라이휠(10)의 원심력에 의하여 외부 코일 스프링(17)은 1차 플라이휠(11)의 외주위 내면에, 내부 코일 스프링(18)은 외부 코일 스프링(17)의 내주면과 마찰 접촉하면서 진동이 감쇠되는 것이다.The dual mass flywheel is a flange 15 by the relative rotational speed difference between the primary flywheel 11 and the secondary flywheel 12 when the rotational force of the crankshaft is transmitted to the primary flywheel 11 as its torque is changed. Damper means 16a and 16b are tension-compressed as they rotate clockwise or counter-clockwise, thereby damping vibration, and when the damper means 16a and 16b are damped as described above, By the centrifugal force, the outer coil spring 17 is in contact with the inner circumferential surface of the primary flywheel 11, and the inner coil spring 18 is in friction contact with the inner circumferential surface of the outer coil spring 17, and vibration is attenuated.

그러나 상기한 듀얼 매스 플라이휠은 진동 감쇠시 외부 코일 스프링(17)은 1차 플라이휠(11)의 외주위 내면에, 내부 코일 스프링(18)은 외부 코일 스프링(17)의 내면에 마찰 접촉하면서 진동이 감쇠될 때 그 마찰력에 의하여 내외부 코일 스프링(18)(17)의 스프링상수가 작아지고, 상기와 같이 내외부 코일 스프링(18)(17)의 스프링상수가 작아지면 회전수에 따라 플라이휠의 진동감쇠 특성이 변경됨으로써 래틀(rattle) 소음 등이 발생되는 것이다.However, when the dual mass flywheel vibrates, the external coil spring 17 contacts the inner circumferential inner surface of the primary flywheel 11 and the inner coil spring 18 contacts the inner surface of the outer coil spring 17 while vibrating the vibration. When damped, the spring constant of the inner and outer coil springs 18 and 17 decreases due to the frictional force, and as the spring constant of the inner and outer coil springs 18 and 17 decreases as described above, the vibration damping characteristics of the flywheel depend on the rotational speed. By this change, rattle noise or the like is generated.

본 발명은 상기한 문제점을 시정하여, 댐퍼수단의 스프링상수를 항상 일정하게 유지할 수 있도록 한 차량용 듀얼 매스 플라이휠을 제공하는 것을 목적으로 한다.SUMMARY OF THE INVENTION An object of the present invention is to provide a dual mass flywheel for a vehicle in which the spring constant of the damper means can be kept constant at all times by correcting the above problems.

상기한 목적을 달성하기 위하여, 본 발명은 중심에 허브를 설치한 1차 플라이휠과, 상기 허브에 중심을 지지한 2차 플라이휠과, 상기 2차 플라이휠에 플랜지를 설치하여 상기 플랜지의 양측과 상기 1차 플라이휠의 외주위 내면에 지지되는 댐퍼수단을 구비한 것에 있어서, 상기 댐퍼수단은 x형 제 1 및 제 2 단위부재 다수조를 자유단끼리 상호 연결하여 호상으로 형성하고, 상기 x형 제 1 및 제 2 단위부재의 외측 자유단 연결부에 롤러를 설치하여 상기 롤러가 1차 플라이휠의 외주위 내면에 롤링 접촉되게 한 것이다.In order to achieve the above object, the present invention provides a primary flywheel having a hub in the center, a secondary flywheel supporting the center in the hub, and a flange in the secondary flywheel to install both sides of the flange and the 1 And a damper means supported on an outer circumferential inner surface of the vehicle flywheel, wherein the damper means is formed in an arc shape by interconnecting a plurality of sets of x-type first and second unit members to each other, and the x-type first and The roller is provided at the outer free end connection portion of the second unit member so that the roller is in rolling contact with the inner peripheral surface of the primary flywheel.

본 발명은 도 3 내지 도 5에 도시한 바와 같이, 플라이휠(10)을 1차 플라이 휠(11)과 2차 플라이휠(12)로 구분 형성하여 1차 플라이휠(11)은 허브(13)로서 크랭크 샤프트에 고정하고, 2차 플라이휠(12)은 그 중심을 상기 허브(13)에 부시(14)로 지지하여 트랜스 밋숀의 입력축이 클러치를 통하여 단속되도록 한 것이다.3 to 5, the flywheel 10 is divided into a primary flywheel 11 and a secondary flywheel 12 so that the primary flywheel 11 is cranked as a hub 13. Fixed to the shaft, the secondary flywheel 12 supports the center thereof with the bush 14 to the hub 13 so that the input shaft of the transmission can be interrupted through the clutch.

그리고 2차 플라이휠(12)에는 플랜지(15)를 설치하고, 상기 플랜지(15)의 양측에 댐퍼수단(30a)(30b)을 상기 1차 플라이휠(11)의 외주위 내면에 지지되게 설치한 것이다.And the secondary flywheel 12 is provided with a flange 15, the damper means (30a, 30b) on both sides of the flange 15 is installed so as to be supported on the inner peripheral surface of the primary flywheel (11). .

상기 댐퍼수단(30a)(30b)은 스프링강등 탄성이 양호한 일정길이의 바를 교차되게 연결한 x형 제 1 단위부재(31)와 제 2 단위부재(41)를 1조로 형성하여 상기 x형 제 1 단위부재(31)의 바(32a)(32b)의 양단에 지지홈(33a)(33b)을 형성하고, x형제 2 단위부재(41)의 바(42a)(42b)의 양단에 지지돌기(43a)(43b)를 형성하여서, 지지돌기(43a)(43b)를 지지홈(33a)(33b)에 삽입한 후 핀(34a)(34b)으로 연결한 것을 다수조를 상호 호상으로 연결하여 형성하고, 상기 x형 제 1 및 제 2 단위부재(31)(41)의 외측 자유단 연결부에 롤러(35a)(35b)를 설치하여 롤러(35a)(35b)가 상기 제 1 플라이휠(11)의 외주위 내면에 롤링 접촉되게 한 것이다.The damper means (30a) (30b) is formed by forming a pair of x-type first unit member 31 and the second unit member 41, which cross bars of a predetermined length having good elasticity, such as spring steel, the x-type first Support grooves 33a and 33b are formed at both ends of the bars 32a and 32b of the unit member 31, and support protrusions are formed at both ends of the bars 42a and 42b of the x-type second unit member 41. 43a) and 43b are formed, and the support protrusions 43a and 43b are inserted into the support grooves 33a and 33b, and the pins 34a and 34b are connected to each other to form a plurality of pairs. In addition, rollers 35a and 35b are provided at the outer free end connection portions of the x-type first and second unit members 31 and 41 so that the rollers 35a and 35b are formed of the first flywheel 11. It is to make rolling contact with the inner surface of outer periphery.

상기 제 1 및 제 2 단위부재(31)(41)를 다수조 연결할 때 바(32a)(32b) (42a)(42b)의 교차점을 기준으로 그 외측 길이를 내측 길이보다 길게 형성하면 일정길이를 호상으로 간편하게 형성할 수 있는 것이다.When the first and second unit members 31 and 41 are connected in plural, the outer length is formed longer than the inner length based on the intersection of the bars 32a, 32b, 42a and 42b. It can be easily formed into an arc.

미설명부호 19는 커버이고, 20은 링기어이며, 21a, 21b, 22a, 22b는 1차 플라이휠(11)의 댐퍼수단(30a)(30b) 양단에 설치한 스톱퍼이다.Reference numeral 19 is a cover, 20 is a ring gear, and 21a, 21b, 22a and 22b are stoppers provided at both ends of the damper means 30a and 30b of the primary flywheel 11.

이상과 같은 본 발명은 크랭트 샤프트의 회전력이 그 토크가 변경되면서 1차 플라이휠(11)에 전달될 때 1차 플라이휠(11)과 2차 플라이휠(12) 사이의 상대 회전 속도차에 의하여 플랜지(15)가 시계 또는 반시계방향으로 회전함에 따라 댐퍼수단(30a)(30b)의 x형 제 1 및 제 2 단위부재(31)(41)가 도 6a, 6b와 같이 인장ㆍ압축되면서 각 바(32a)(32b)(42a)(42b)의 사이가 넓어지거나 좁아짐으로써 진동을 감쇠하며, 상기와 같이 댐퍼수단(30a)(30b)에 의하여 진동을 감쇠할 때 x형 제 1 및 제 2 단위부재(31)(41)의 외측 자유단 연결부에 설치한 롤러(35a)(35b)는 1차 플라이휠(11)의 외주위 내면에 롤링접촉함으로써 댐퍼수단(30a)(30b)의 스프링상수를 일정하게 유지할 수 있음으로 플라이휠(10)의 진동감쇠 특성의 변경이 없게 되는 것이다.The present invention as described above is a flange (by the relative rotational speed difference between the primary flywheel 11 and the secondary flywheel 12 when the rotational force of the crankshaft is transmitted to the primary flywheel 11 while its torque is changed) As the 15 is rotated clockwise or counterclockwise, the x-type first and second unit members 31 and 41 of the damper means 30a and 30b are tensioned and compressed as shown in FIGS. The damping vibration is attenuated by widening or narrowing between 32a, 32b, 42a and 42b, and the x type first and second unit members when damping the vibration by damper means 30a and 30b as described above. The rollers 35a and 35b provided on the outer free end connection portion of the 31 and 41 are in rolling contact with the outer circumferential inner surface of the primary flywheel 11 so that the spring constant of the damper means 30a and 30b is constant. By maintaining it, there is no change in the vibration damping characteristics of the flywheel 10.

이상과 같이 본 발명은 댐퍼수단을 x형 제 1 및 제 2 단위부재의 다수조를 그 내외측 자유단끼리 상호 연결하여 호상으로 형성하고, 그 외측 자유단 연결부에 롤러를 설치하여 1차 플라이휠의 외주위 내면에 롤링 접촉되게 하였음으로 댐퍼수단에서 진동이 감쇠될 때 댐퍼수단의 스프링상수를 일정하게 유지함으로 플라이휠의 진동감쇠의 변경이 없게 되어서 진동감쇠를 양호하게 할 수 있고, 래틀 등의 소음도 억제할 수 있는 것이다.As described above, in the present invention, the damper means forms a plurality of sets of x-type first and second unit members in an arc shape by interconnecting the inner and outer free ends thereof, and installs a roller at the outer free end connecting portion of the primary flywheel. Rolling contact with the inner surface of the outer circumference keeps the spring constant of the damper means constant when vibration is damped in the damper means, so that the vibration attenuation of the flywheel is not changed and the vibration attenuation can be satisfactorily suppressed. You can do it.

Claims (3)

중심에 허브를 설치한 1차 플라이휠과, 상기 허브에 중심을 지지한 2차 플라이휠과, 상기 2차 플라이휠에 플랜지를 설치하여 상기 플랜지의 양측과 상기 1차 플라이휠의 외주위 내면에 지지되는 댐퍼수단을 구비한 것에 있어서, 상기 댐퍼수단은 x형 제 1 및 제 2 단위부재 다수조를 자유단끼리 상호 연결하여 호상으로 형성하고, 상기 x형 제 1 및 제 2 단위부재의 외측 자유단 연결부에 롤러를 설치하여 상기 롤러가 1차 플라이휠의 외주위 내면에 롤링 접촉되게 한 차량용 듀얼 매스 플라이휠.A primary flywheel having a hub in the center, a secondary flywheel supporting the center in the hub, and a damper means provided on both sides of the flange and an outer circumferential inner surface of the primary flywheel by installing a flange on the secondary flywheel. The damper means has a plurality of x-type first and second unit members formed in an arc shape by connecting the plurality of free ends to each other, and a roller on an outer free end connection portion of the x-type first and second unit members. A dual mass flywheel for a vehicle provided with a roller to be in rolling contact with the outer circumferential inner surface of the primary flywheel. 제 1 항에 있어서, x형 제 1 및 제 2 단위부재는 x형 제 1 단위부재의 바의 양단에 지지홈을 형성하고, x형 제 2 단위부재의 바의 양단에 지지돌기를 형성하여 지지돌기를 지지홈에 삽입한 후 핀으로 연결한 차량용 듀얼 매스 플라이휠.The method of claim 1, wherein the x-type first and second unit members are formed with support grooves at both ends of the bar of the x-type first unit member, and support protrusions are formed at both ends of the bar of the x-type second unit member. Dual mass flywheel for vehicles with the protrusions inserted into the support grooves and connected by pins. 제 1 항에 있어서, x형 제 1 및 제 2 단위부재는 바의 교차점을 기준으로 그 외측 길이를 내측 길이보다 길게 형성한 차량용 듀얼 매스 플라이휠.The dual mass flywheel for a vehicle according to claim 1, wherein the x-type first and second unit members have an outer length greater than an inner length based on the intersection of the bars.
KR1020060044897A 2006-05-19 2006-05-19 Dual mass flywheel for vehicle KR101229763B1 (en)

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Publication number Priority date Publication date Assignee Title
KR19980041896A (en) * 1997-09-24 1998-08-17 허광용 Shock Absorber
JP2003097621A (en) * 2001-09-27 2003-04-03 Daiwa House Ind Co Ltd Friction damper
WO2005028907A1 (en) * 2003-09-12 2005-03-31 Zf Friedrichshafen Ag Friction lining plates

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980041896A (en) * 1997-09-24 1998-08-17 허광용 Shock Absorber
KR100246635B1 (en) * 1997-09-24 2000-04-01 허광용 Mitigation equipment of absorbing impact
JP2003097621A (en) * 2001-09-27 2003-04-03 Daiwa House Ind Co Ltd Friction damper
WO2005028907A1 (en) * 2003-09-12 2005-03-31 Zf Friedrichshafen Ag Friction lining plates

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