KR20080046050A - Drive system for cooling fan of vehicle - Google Patents

Drive system for cooling fan of vehicle Download PDF

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Publication number
KR20080046050A
KR20080046050A KR1020060115492A KR20060115492A KR20080046050A KR 20080046050 A KR20080046050 A KR 20080046050A KR 1020060115492 A KR1020060115492 A KR 1020060115492A KR 20060115492 A KR20060115492 A KR 20060115492A KR 20080046050 A KR20080046050 A KR 20080046050A
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KR
South Korea
Prior art keywords
fan
shaft
pulley
cooling fan
clutch
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KR1020060115492A
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Korean (ko)
Inventor
변형석
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현대자동차주식회사
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Priority to KR1020060115492A priority Critical patent/KR20080046050A/en
Publication of KR20080046050A publication Critical patent/KR20080046050A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2050/00—Applications
    • F01P2050/22—Motor-cars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/0467—Spherical bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Pulleys (AREA)

Abstract

An apparatus for driving a cooling fan of a vehicle is provided to eliminate a fan clutch mounting bolt and a fan pulley shaft, and eliminate an oil seal and a ring retainer by using a single ball bearing having both sides filled with grease and sealed. An apparatus for driving a cooling fan of a vehicle includes a cooling fan(106), a fan clutch, a fan shaft, a fan pulley(103). The cooling fan is arranged in the rear of a radiator and sucks outdoor air in. The fan clutch controls the ratio of the input rotation to the output rotation of the cooling fan. The fan shaft is extended in an axial direction in the fan clutch. The fan pulley is mounted on the fan shaft so as to rotate the fan shaft.

Description

자동차용 냉각팬 구동장치{Drive system for cooling fan of vehicle}Drive system for cooling fan for vehicles {Drive system for cooling fan of vehicle}

도 1은 본 발명에 따른 자동차용 냉각팬 구동장치의 일실시예를 나타내는 단면도이고,1 is a cross-sectional view showing an embodiment of a vehicle cooling fan driving apparatus according to the present invention,

도 2는 종래의 자동차용 냉각팬 구동장치의 일례를 나타내는 사시도이고,Figure 2 is a perspective view showing an example of a conventional automotive cooling fan drive device,

도 3은 종래의 자동차용 냉각팬 구동장치의 구조를 나타내는 단면도이다.3 is a cross-sectional view showing the structure of a conventional automotive cooling fan drive apparatus.

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

10 : 팬 클러치 11 : 팬 샤프트10: fan clutch 11: fan shaft

12 : 팬 풀리 13 : 볼 베어링12: fan pulley 13: ball bearing

14 : 케이스 15 : 키(key)14 Case 15 Key

본 발명은 자동차용 냉각팬 구동장치에 관한 것으로서, 더욱 상세하게는 팬 풀리 샤프트를 삭제한 후 팬 클러치 내부의 샤프트를 연장하여 팬 풀리를 장착하고, 그리스가 충진되어 양면이 모두 실링된 하나의 볼 베어링을 사용하여 단순화함 으로써, 사용부품의 삭제 및 축소에 의한 중량감소를 통하여 원가절감 및 차량 연비를 향상시킬 수 있도록 한 자동차용 냉각팬 구동장치에 관한 것이다.The present invention relates to a cooling fan driving apparatus for a vehicle, and more particularly, after removing a fan pulley shaft, a fan pulley is mounted by extending a shaft inside the fan clutch, and a ball filled with grease is sealed on both sides. By simplifying the use of bearings, the present invention relates to a cooling fan driving apparatus for automobiles, which can reduce cost and improve vehicle fuel economy by reducing weight by eliminating and reducing used parts.

일반적으로 중,대형버스에서 엔진의 냉각수를 식히기 위한 라디에이터는 보통 엔진 측면의 왼쪽 또는 오른쪽에 위치하며, 상기 라디에이터를 냉각시키기 위해 강제로 풍량을 만드는 냉각팬이 라디에이터 후방에 구성되어 있다. In general, a radiator for cooling the engine coolant in the medium and large buses is usually located on the left or right side of the engine side, and a cooling fan forcing air volume to cool the radiator is configured at the rear of the radiator.

상기 냉각팬의 구동은 도 2 및 도 3에 도시한 바와 같이 엔진 크랭크샤프트 풀리(101)와 아이들 풀리(102)를 V-벨트(104)로 연결하거나 또는 아이들 풀리(102)와 팬 풀리(103)를 V-벨트(104)로 연결하여 구동하는 방식이다.The cooling fan is driven by connecting the engine crankshaft pulley 101 and the idle pulley 102 to the V-belt 104 as shown in FIGS. 2 and 3 or the idle pulley 102 and the fan pulley 103. ) Is connected to the V-belt 104 to drive.

상기 팬 풀리(103)는 팬 클러치(105)와 냉각팬(106)에 결합되어 팬을 구동시키고, 팬 클러치(105)의 역할은 입력 회전수 대비 출력 회전수의 비를 조절하는 장치로써 엔진이 냉각될 필요가 없을시에는 냉각팬 회전수를 저감시키는 역할을 한다. The fan pulley 103 is coupled to the fan clutch 105 and the cooling fan 106 to drive the fan, the role of the fan clutch 105 is to adjust the ratio of the input rotational speed to the output rotational speed as the engine is When it does not need to be cooled serves to reduce the cooling fan speed.

그리고 엔진이 과열되었을 시에는 냉각팬 출력 회전수를 입력 회전수와 거의 동일하게 높여주는 기능을 한다.  When the engine is overheated, the cooling fan output speed is increased to be almost equal to the input speed.

V-벨트(104)에 의해 구동되는 팬 풀리(103)는 팬 풀리 어셈블리에 포함된 팬샤프트(107)와 팬 클러치(105)를 볼트로 4개소에서 체결하고, 팬 클러치(105)는 냉각팬(106)과 8개소에서 마운팅된 구조이다.The fan pulley 103 driven by the V-belt 104 fastens the fan shaft 107 and the fan clutch 105 included in the fan pulley assembly at four positions with bolts, and the fan clutch 105 is a cooling fan. It is a structure mounted at 106 and eight places.

상기 팬 풀리(103)의 구성은 양단부가 실링이 되지 않은 볼 베어링(108) 2개와 내부의 그리스 및 베어링의 윤활 및 외부로부터의 먼지, 수분, 금속분 등의 침입을 방지하기 위한 양단부의 오일실(109)과 오일실(109)의 이탈을 방지해주는 링 리테이너(110)가 2개씩 구성되어 있다.The fan pulley 103 is configured to include two ball bearings 108, both ends of which are not sealed, and oil chambers at both ends for preventing lubrication of grease and bearings inside and intrusion of dust, moisture, metal powder, etc. from the outside ( 109 and the ring retainer 110 to prevent the separation of the oil chamber 109 is composed of two.

이때, 상기 팬 풀리(103) 후방에 설치된 그리스충진용 니플(111)을 통해 그리스가 충진된다.At this time, the grease is filled through the grease filling nipple 111 installed at the rear of the fan pulley 103.

그러나, 상기 그리스는 차량출고 시 충진된 후 주기적으로 충진해야하는 단점이 있고, 팬 풀리 회전시 그리스가 바깥쪽으로 튀면서 주변부품을 오염시키고 내구성을 저하시키는 문제점이 있다.However, the grease has a disadvantage in that it should be periodically filled after being filled at the time of delivery of the vehicle, and when the fan pulley rotates, the grease splashes outward to contaminate peripheral parts and reduce durability.

상기 팬 풀리는 V-벨트에 의해 구동되며 내부의 팬 풀리 샤프트(112)와는 키로 연결되어 같은 회전수만큼 회전하게 되고, 상기 팬 풀리 샤프트는 팬 클러치의 샤프트와 볼트로 4개소에 체결되어 부품수 및 조립공수를 증가시키는 단점이 있다.The fan pulley is driven by the V-belt and is connected to the inner fan pulley shaft 112 by a key to rotate by the same rotational speed, and the fan pulley shaft is fastened to four places by the shaft and bolt of the fan clutch and the number of parts and There is a disadvantage of increasing the assembly labor.

본 발명은 상기와 같은 점을 감안하여 안출한 것으로서, 팬 풀리 샤프트를 삭제한 후 팬 클러치 내부의 샤프트를 연장하여 팬 풀리를 장착하고, 하나의 투-실드 볼 베어링(그리스가 충진되어 양면이 모두 실링됨)을 사용하여 단순화함으로써, 종래의 팬 클러치와 팬 풀리 샤프트를 마운팅하기 위한 볼트를 삭제하고, 종래에는 2개의 볼 베어링을 사용하였으나, 양면에 그리스가 충진된 후 실링된 하나의 볼 베어링을 사용하여 오일 실 및 링 리테이터를 삭제하며, 그리스가 충진되지 않으므로 종래의 그리스로 인한 주변부품의 오염방지 및 내구성 향상에 기여할 수 있고, 시스템 전반에 걸쳐 사용부품의 삭제 및 축소에 의한 중량감소를 통하여 원가절감 및 차량 연비를 향상시킬 수 있도록 한 자동차용 냉각팬 구동장치를 제공하는데 그 목 적이 있다.The present invention has been devised in view of the above, and after removing the fan pulley shaft, the shaft inside the fan clutch is extended to mount the fan pulley, and one two-shield ball bearing (the grease is filled to both sides (Sealed), eliminating the bolts for mounting the conventional fan clutch and fan pulley shaft, and conventionally using two ball bearings, but with one ball bearing sealed after grease is filled on both sides. It eliminates oil seals and ring retainers, and because it is not filled with grease, it can contribute to the prevention of contamination and durability of peripheral parts caused by conventional grease. The purpose of the present invention is to provide a cooling fan drive device for automobiles that can reduce cost and improve fuel economy.

상기한 목적을 달성하기 위한 본 발명은 자동차용 냉각팬 구동장치에 있어서,In the present invention for achieving the above object in the automotive cooling fan drive device,

라디에이터의 후방에 설치되어 강제로 외기를 흡입하는 냉각팬과; 상기 냉각팬의 입력회전수와 출력회전수의 비를 조절하는 팬 클러치와; 상기 팬 클러치의 내부에서 축방향으로 길게 연장형성된 팬 샤프트와; 상기 팬 샤프트에 설치되어 팬 샤프트를 회전시켜주는 팬 풀리;를 포함하여 구성된 것을 특징으로 한다.A cooling fan installed at the rear of the radiator and forcibly sucking outside air; A fan clutch for adjusting a ratio of an input rotational speed and an output rotational speed of the cooling fan; A fan shaft extended in the axial direction in the fan clutch; And a fan pulley installed on the fan shaft to rotate the fan shaft.

바람직한 구현예로서, 상기 팬 샤프트의 후단부를 지지하고 상기 팬 샤프트의 상대적 운동을 원활하게 하기 위해 설치된 베어링을 포함하는 것을 특징으로 한다.In a preferred embodiment, the bearing comprises a bearing installed to support the rear end of the fan shaft and to facilitate relative movement of the fan shaft.

더욱 바람직한 구현예로서, 상기 베어링은 그리스가 충진되어 양면 모두가 실링(sealing)된 하나의 볼 베어링인 것을 특징으로 한다.In a more preferred embodiment, the bearing is a ball bearing filled with grease and sealed on both sides.

이하, 본 발명의 바람직한 실시예를 첨부도면을 참조로 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부한 도 1은 본 발명에 따른 자동차용 냉각팬 구동장치의 일실시예를 나타내는 단면도이다.1 is a cross-sectional view showing an embodiment of a vehicle cooling fan driving apparatus according to the present invention.

본 발명은 팬 풀리 샤프트를 삭제하고, 팬 클러치(10)의 내부에 설치된 팬 샤프트(11)를 연장형성하여 팬 풀리(12)를 설치하여 종래의 팬 풀리 샤프트와 팬 샤프트(11)를 연결하기 위한 복잡한 구조를 단순화하고, 그리스가 충진되어 양면이 실링된 하나의 볼 베어링(13)을 설치함으로써, 종래의 문제점을 개선할 수 있도록 한 점에 주안점이 있다.The present invention eliminates the fan pulley shaft, and extends the fan shaft 11 installed inside the fan clutch 10 to install the fan pulley 12 to connect the conventional fan pulley shaft and the fan shaft 11. The main point is to simplify the complicated structure and to improve the conventional problem by installing one ball bearing 13 filled with grease and sealed on both sides.

본 발명에 따른 냉각팬 구동장치의 일실시예는 중,대형버스에서 사용되는 냉각팬에 적용된다.One embodiment of the cooling fan drive apparatus according to the present invention is applied to the cooling fan used in the medium and large buses.

본 발명은 냉각팬의 입력 회전수와 출력 회전수의 비를 조절하는 역할을 수행하는 팬 클러치(10)를 제공하고, 팬 클러치(10)의 내부에는 팬 샤프트(11)가 설치되어 있다.이때, 팬 샤프트(11)의 전단부에는 냉각팬이 설치되어 팬 샤프트(11)과 연동되어 회전하게 된다.The present invention provides a fan clutch 10 that serves to adjust the ratio of the input rotational speed and the output rotational speed of the cooling fan, and the fan shaft 11 is installed inside the fan clutch 10. In front of the fan shaft 11, a cooling fan is installed to rotate in conjunction with the fan shaft 11.

여기서, 상기 팬 샤프트(11)의 전단부는 팬 클러치(10)의 내부에 설치되고, 팬 샤프트(11)의 후단부는 팬 클러치(10) 외부에 축방향으로 길게 연장 형성되게 된다.Here, the front end of the fan shaft 11 is installed in the fan clutch 10, the rear end of the fan shaft 11 is formed to extend in the axial direction long outside the fan clutch 10.

상기 연장된 팬 샤프트(11)에는 팬 샤프트(11)를 회전시키기 위해 팬 풀리(12)가 설치되어 있고, 팬 풀리(12)의 회전운동을 팬 샤프트(11)에 전달하기 위해 키(15)(key)가 팬 풀리(12)와 팬 샤프트(11) 사이에 삽입설치되어 있다.The extended fan shaft 11 is provided with a fan pulley 12 to rotate the fan shaft 11, the key 15 to transmit the rotational movement of the fan pulley 12 to the fan shaft 11 A key is inserted between the fan pulley 12 and the fan shaft 11.

상기 팬 풀리(12)의 후방에는 하나의 볼 베어링(13)이 설치되어 팬 샤프트(11)의 후단부를 지지하고 팬 샤프트(11)의 회전운동을 원활하게 하며, 볼 베어링(13)의 외부에 케이스(14)가 설치되어 있다.One ball bearing 13 is installed at the rear of the fan pulley 12 to support the rear end of the fan shaft 11, to facilitate the rotational movement of the fan shaft 11, and to the outside of the ball bearing 13. The case 14 is provided.

상기 팬 풀리(12)에는 v벨트에 의해 일정한 간격으로 연결된 아이들 풀리 및 크랭크샤프트 풀리가 설치되어 있고, 상기 크랭크샤프트 풀리는 크랭크 축의 선단에 설치되어 크랭크 축에 의해 구동되게 된다.The fan pulley 12 is provided with idle pulleys and crankshaft pulleys connected at regular intervals by v-belts, and the crankshaft pulleys are installed at the front end of the crankshaft and driven by the crankshaft.

이와 같은 구성에 의해 종래와 본 발명의 차이점을 설명하면 다음과 같다.The difference between the conventional and the present invention by such a configuration is as follows.

종래에는 팬 클러치(10)의 내부에 설치된 팬 샤프트(11)와 팬 풀리(12)가 설치된 팬 풀리 샤프트를 연결하기 위해 팬 샤프트(11)의 후단과 팬 풀리(12)의 전단에 플랜지부를 형성하여 다수의 볼트로 팬 샤프트(11)와 팬 풀리(12)를 서로 연결하였고, 팬 풀리 샤프트의 길이가 불필요하게 길게 형성되어 있었다.Conventionally, a flange portion is formed at the rear end of the fan shaft 11 and the front end of the fan pulley 12 to connect the fan shaft 11 installed inside the fan clutch 10 and the fan pulley shaft provided with the fan pulley 12. The fan shaft 11 and the fan pulley 12 were connected to each other by a plurality of bolts, and the length of the fan pulley shaft was unnecessarily long.

본 발명은 상기 팬 풀리 샤프트를 삭제하고, 팬 샤프트(11)의 길이를 연장시켜 별도의 연결구조(플랜지부) 및 체결구(볼트)를 삭제하여 단순화 하였다.The present invention is simplified by removing the fan pulley shaft, extending the length of the fan shaft 11 to eliminate the separate connection structure (flange) and fasteners (bolts).

종래에는 양면이 실링되지 않은 두개의 볼 베어링(13)과, 양단의 오일실 및 오일실의 이탈을 방지하기 위한 링 리테이너를 2개씩 설치하였으나, 본 발명은 상기 팬 샤프트(11)에 팬 풀리(12)를 장착하되, 그리스가 충진되어 양면이 실링된 볼 베어링(13) 하나를 팬 풀리(12) 후방에 설치함으로써, 종래의 그리스로 인한 주변부품의 오염방지 및 주기적인 그리스 충진을 삭제하였다.Conventionally, two ball bearings 13 are not sealed at both sides, and oil retainers at both ends and two ring retainers are installed to prevent separation of the oil seals. However, the present invention provides a fan pulley (2) in the fan shaft (11). 12), but by installing a ball bearing 13, which is filled with grease and sealed on both sides, behind the fan pulley 12, the conventional grease prevents contamination of the peripheral parts and periodic grease filling is eliminated.

이와 같이 시스템 전반적으로 사용부품의 삭제 및 축소에 의한 중량감소를 통하여 원가절감 및 차량 연비를 향상시킬 수 있다.As such, cost reduction and vehicle fuel economy can be improved by reducing weight by eliminating and reducing parts used throughout the system.

이상에서는 본 발명을 특정의 바람직한 실시예에 대하여 도시하고 설명하였으나, 본 발명은 이러한 실시예에 한정되지 않으며, 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 특허청구범위에서 청구하는 본 발명의 기술적 사상을 벗어나지 않는 범위내에서 실시할 수 있는 다양한 형태의 실시예들을 모두 포함한다.While the invention has been shown and described with respect to certain preferred embodiments thereof, the invention is not limited to these embodiments, and has been claimed by those of ordinary skill in the art to which the invention pertains. It includes all the various forms of embodiments that can be carried out without departing from the spirit.

이상에서 본 바와 같이, 본 발명에 따른 자동차용 냉각팬 구동장치에 의하면, 팬 풀리 샤프트를 삭제하고, 팬 샤프트의 길이를 연장시켜 별도의 연결구조(플랜지부) 및 체결구(볼트)를 삭제하여 구조를 단순화시킬 수 있다.As described above, according to the automotive cooling fan drive apparatus according to the present invention, by removing the fan pulley shaft, extending the length of the fan shaft to remove the separate connection structure (flange portion) and fasteners (bolts) The structure can be simplified.

종래에는 양면이 실링되지 않은 두개의 볼 베어링과, 양단의 오일실 및 오일실의 이탈을 방지하기 위한 링 리테이너를 2개씩 설치하였으나, 본 발명은 상기 팬 샤프트에 팬 풀리를 장착하되, 그리스가 충진되어 양면이 실링된 볼 베어링 하나를 팬 풀리 후방에 설치함으로써, 종래의 그리스로 인한 주변부품의 오염방지, 내구성 향상 및 주기적인 그리스 충진을 삭제할 수 있다.Conventionally, two ball bearings that are not sealed on both sides, and two ring retainers for preventing separation of oil seals and oil seals at both ends are installed, but the present invention is equipped with a fan pulley on the fan shaft, but is filled with grease Therefore, by installing one ball bearing with double-sided sealing behind the fan pulley, it is possible to prevent contamination of the peripheral parts due to the conventional grease, to improve durability, and to periodically fill the grease.

따라서, 시스템 전반에 걸쳐 사용부품의 삭제 및 축소에 의한 중량감소를 통하여 원가절감 및 차량 연비를 향상시킬 수 있다.Therefore, cost reduction and vehicle fuel economy can be improved through weight reduction by eliminating and reducing parts used throughout the system.

Claims (3)

자동차용 냉각팬 구동장치에 있어서,In the automotive cooling fan drive device, 라디에이터의 후방에 설치되어 강제로 외기를 흡입하는 냉각팬과;A cooling fan installed at the rear of the radiator and forcibly sucking outside air; 상기 냉각팬의 입력회전수와 출력회전수의 비를 조절하는 팬 클러치(10)와;A fan clutch 10 for adjusting a ratio of an input rotational speed and an output rotational speed of the cooling fan; 상기 팬 클러치(10)의 내부에서 축방향으로 길게 연장형성된 팬 샤프트(11)와;A fan shaft (11) extending in the axial direction in the fan clutch (10); 상기 팬 샤프트(11)에 설치되어 팬 샤프트(11)를 회전시켜주는 팬 풀리(12);A fan pulley (12) installed on the fan shaft (11) to rotate the fan shaft (11); 를 포함하여 구성된 것을 특징으로 하는 자동차용 냉각팬 구동장치.Automotive cooling fan drive device, characterized in that configured to include. 청구항 1에 있어서,The method according to claim 1, 상기 팬 샤프트(11)의 후단부를 지지하고 상기 팬 샤프트(11)의 상대적 운동을 원활하게 하기 위해 설치된 베어링을 포함하는 것을 특징으로 하는 자동차용 냉각팬 구동장치.And a bearing installed to support the rear end of the fan shaft (11) and to facilitate the relative movement of the fan shaft (11). 청구항 2에 있어서,The method according to claim 2, 상기 베어링은 그리스가 충진되어 양면 모두가 실링(sealing)된 하나의 볼 베어링(13)인 것을 특징으로 하는 자동차용 냉각팬 구동장치.The bearing is a vehicle cooling fan drive, characterized in that one ball bearing 13 is filled with grease (sealing) on both sides (sealing).
KR1020060115492A 2006-11-21 2006-11-21 Drive system for cooling fan of vehicle KR20080046050A (en)

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