KR100854581B1 - Wheel driving apparatus of heavy equipment having wet type brake system - Google Patents

Wheel driving apparatus of heavy equipment having wet type brake system Download PDF

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Publication number
KR100854581B1
KR100854581B1 KR1020070052018A KR20070052018A KR100854581B1 KR 100854581 B1 KR100854581 B1 KR 100854581B1 KR 1020070052018 A KR1020070052018 A KR 1020070052018A KR 20070052018 A KR20070052018 A KR 20070052018A KR 100854581 B1 KR100854581 B1 KR 100854581B1
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KR
South Korea
Prior art keywords
ring gear
planetary gear
housing
brake
gear
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KR1020070052018A
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Korean (ko)
Inventor
한상훈
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성보 피앤티 주식회사
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Priority to KR1020070052018A priority Critical patent/KR100854581B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0412—Cooling or heating; Control of temperature

Abstract

A power transmission for heavy machinery equipped with a wet type brake system is provided to allow cooling oil to smoothly flow between the brake system and a planet gear by forming a plurality of oil passages along the circumference of a ring gear member. A power transmission for heavy machinery equipped with a wet type brake system(22) comprises a planet gear system(4). The planet gear system includes a driving shaft(12), a sun gear(14) axially coupled to the driving shaft, a planet gear(18) meshing with the sun gear, a carrier hub wheel(6) inserted around an outer surface of a knuckle housing(10) and supported by a bearing(8), an outer housing(16) and a ring gear member(20). The planet gear comes in contact with an inner surface of a first side of the outer housing. A second side of the outer housing is inserted around the outer circumference of the carrier hub wheel. The ring gear member has a first side coming into contact with an inner side of the planet gear and a second side coupled to an outer circumference of the knuckle housing through a spline. A piston member(28) is installed between the outer housing and a steering system(2). A plurality of oil grooves are formed along the circumference of the ring gear member and the piston member, respectively.

Description

다판습식브레이크장치를 구비하는 중장비의 동력전달장치{wheel driving apparatus of heavy equipment having wet type brake system}Wheel drive apparatus of heavy equipment having wet type brake system}

도 1은 종래의 중장비용 유성동력전달장치의 개략 단면 구성도이다. 1 is a schematic cross-sectional view of a conventional planetary power transmission device for heavy equipment.

도 2는 종래 유성기어장치의 링기어부재 및 피스톤부재의 사시도이다. 2 is a perspective view of a ring gear member and a piston member of the conventional planetary gear device.

도 3은 본 발명의 실시예에 의한 중장비의 유성동력전달장치의 개략 단면도이다. Figure 3 is a schematic cross-sectional view of the planetary power transmission device of heavy equipment according to an embodiment of the present invention.

도 4는 본 발명의 실시예에 의한 링기어부재의 사시도이다. 4 is a perspective view of a ring gear member according to an embodiment of the present invention.

도 5는 본 발명의 실시예에 의한 링기어부재의 사시도이다. 5 is a perspective view of a ring gear member according to an embodiment of the present invention.

도 6은 본 발명의 다른 실시예에 따른 것으로서, 도 3의 A-A선을 취한 일부 단면도이다. 6 is a partial cross-sectional view taken along the line A-A of FIG. 3 according to another embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

2 ; 조향장치 4 ; 유성기어장치2 ; Steering system 4; Planetary gear device

6 ; 캐리어허브휠 8 ; 베어링6; Carrier hub wheel 8; bearing

10 ; 너클하우징 12 ; 구동축10; Knuckle housing 12; driving axle

14 ; 선기어 16 ; 외부하우징14; Sun gear 16; External housing

18 ; 유성기어 20 ; 링기어부재18; Planetary gear 20; Ring gear member

22 ; 브레이크장치 24 ; 브레이크디스크22; Brake system 24; Brake disc

26 ; 유로 28 ; 피스톤부재26; Euro 28; Piston member

30,36 ; 제1,2 플랜지 34,40,42 ; 제1,2,3 오일유동홈30,36; First, second flange 34,40,42; 1, 2, 3 oil flow groove

A ; 차륜축 L ; 냉각용 오일A; Wheel shaft L; Cooling oil

본 발명은 중장비용 동력전달장치에 관한 것으로서, 보다 상세하게는 액슬하우징에 연결되며 조향장치와 차륜이 장착되는 동력전달장치의 말단으로서 다판습식브레이크장치를 구비하는 중장비의 동력전달장치에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for heavy equipment, and more particularly, to a power transmission device of heavy equipment having a multi-plate wet brake device as an end of a power transmission device to which a steering device and a wheel are mounted.

종래의 중장비용 유성동력전달장치 내지 허브감속장치의 구성은 도 1의 개략 단면도에 도시한 바와 같다. 도 2는 종래 유성기어장치의 링기어부재 및 피스톤부재의 사시도이다. The configuration of the conventional planetary power transmission device for the heavy equipment to hub reduction device is as shown in the schematic cross-sectional view of FIG. 2 is a perspective view of a ring gear member and a piston member of the conventional planetary gear device.

차동기어 장치로 전달된 엔진의 구동력은 회전방향이 수직으로 전환되고 감속과 동시에 회전력이 증가된 상태로 양쪽 차륜을 향해 대칭적으로 설치되는 차륜축(A)으로 전달된다. 차륜축(A)의 회전력은 조향장치(102)를 통과하여 유성기어장치(104)에 전달된다. The driving force of the engine transmitted to the differential gear device is transmitted to the wheel shaft A which is symmetrically installed toward both wheels while the rotation direction is vertically changed and the rotation force is increased at the same time as the deceleration. The rotational force of the wheel shaft A is transmitted to the planetary gear device 104 through the steering device 102.

유성기어장치(104)는 차륜축(A)의 회전력을 증가시켜 캐리어허브휠(106)에 전달한다. 캐리어허브휠(106)에 차륜(미도시됨)이 연결된다. 캐리어허브휠(106)은 베어링(108)에 의해 너클하우징(110)의 외부에 회전 가능하게 지지된다. 너클하우징(110)은 조향장치와 관련된다. 조향장치(102)는 너클베어링 구조로서 본 발명과는 관련이 적으므로 상세한 설명을 하지 않는다. 조향장치(102)의 출력축이 되는 구동축(112)은 너클하우징(110) 내부를 통하여 외부로 돌출된다. 유성기어장치(104)의 구성요소인 선기어(114)가 너클하우징(110)으로부터 돌출된 구동축(112)의 단부에 축결합된다. The planetary gear device 104 increases the rotational force of the wheel shaft A and transmits it to the carrier hub wheel 106. Wheels (not shown) are connected to the carrier hub wheel 106. The carrier hub wheel 106 is rotatably supported on the outside of the knuckle housing 110 by a bearing 108. Knuckle housing 110 is associated with a steering device. The steering device 102 is a knuckle bearing structure and is not related to the present invention and thus will not be described in detail. The drive shaft 112, which is an output shaft of the steering device 102, protrudes outward through the knuckle housing 110. The sun gear 114, which is a component of the planetary gear device 104, is axially coupled to an end of the drive shaft 112 protruding from the knuckle housing 110.

유성기어장치(104)는 구동축(112)에 연결된 선기어(114), 외부하우징(116) 내부에 그와 일체로 형성되며 선기어(114)와 치합하여 유성운동을 하게 되는 유성기어(118), 및 유성기어(118)와 치합되는 링기어부재(120)로 구성된다. 링기어부재(120)는 일측이 너클하우징(110)의 외부에 스플라인으로 결합하여 고정된다. 외부하우징(116)은 캐리어허브휠(106)에 기밀을 유지하며 고정되어 그와 함께 회전된다. The planetary gear device 104 is a sun gear 114 connected to the drive shaft 112, the planetary gear 118 is formed integrally with the inside of the outer housing 116 and meshes with the sun gear 114 to make a planetary motion, and The ring gear member 120 meshes with the planetary gear 118. The ring gear member 120 is fixed to one side by coupling with a spline to the outside of the knuckle housing 110. The outer housing 116 is secured to the carrier hub wheel 106 and fixed and rotated therewith.

유성기어장치(104)와 조향장치(102) 사이에는 (다판습식)브레이크장치(122)가 설치된다. 브레이크장치(122)는 다수의 브레이크디스크(124) 및 복잡한 유로(126)를 포함한다. 브레이크장치(122) 또한 본 발명과는 거리가 있는 사항이어서 그 자체에 대한 상세한 설명을 생략한다. Between the planetary gear device 104 and the steering device 102, a (multiple wet type) brake device 122 is provided. The brake device 122 includes a plurality of brake discs 124 and a complicated flow path 126. The brake device 122 is also a matter of distance from the present invention, so a detailed description thereof is omitted.

이러한 중장비의 동력전달장치에 있어서, 브레이크장치(124)와 유성기어장치(104)에는 브레이크작동유와는 별도로 냉각을 위한 냉각용 오일(L)이 충진된다. 냉각용 오일(L)은 회부하우징(116) 내부에 충전된 상태에서 제1 지점(P1)에서 제2 지점(P2)으로 넘나들게 되는데, 이 경우 면적이 넓은 링기어부재(120)는 오일의 순환을 방해하게 된다. 즉, 링기어부재(120)의 측단부(120a)와 외부하우징의 내측벽(116a) 사이의 틈(C)이 너무 좁기 때문이다. In the power transmission device of such heavy equipment, the brake device 124 and the planetary gear device 104 are filled with cooling oil L for cooling separately from the brake hydraulic oil. Cooling oil (L) is passed from the first point (P1) to the second point (P2) in the state filled in the internal housing 116, in this case the ring gear member 120 having a large area of the oil It will interfere with the circulation. That is, because the gap C between the side end portion 120a of the ring gear member 120 and the inner wall 116a of the outer housing is too narrow.

한편 링기어부재(120)와 동일 또는 유사한 면적의 피스톤부재(128)가 링기어부재(120)와 포개지도록 설치되는데, 이 피스톤부재(128) 또한 오일유동을 방해하는 요소가 된다. On the other hand, the piston member 128 having the same or similar area as the ring gear member 120 is installed to overlap with the ring gear member 120. The piston member 128 also becomes an element that hinders oil flow.

이는 큰 직경의 링기어부재(116) 및/또는 피스톤부재(128)가 외부하우징의 내측벽(116a)에 인접되게 설치됨으로써 발생되는 현상이다. 냉각용 오일(L)의 순환이 외부하우징(116) 내부에서 원활하게 이루어지지 못하게 되면, 제동성능은 물론 과열로 인한 브레이크디스크(124)의 마모 내지 소착 등 중대한 기계적 문제를 야기한다. 다판습식브레이크장치를 구비하는 중장비의 종래의 동력전달장치는 위에 언급한 문제를 그대로 안고 있다. 따라서 브레이크디스크(124)의 냉각불량에 의한 잦은 고장, 수명단축 등의 문제가 제기되고 있다. This is a phenomenon that occurs when the large diameter ring gear member 116 and / or the piston member 128 are installed adjacent to the inner wall 116a of the outer housing. If the circulation of the cooling oil (L) is not smoothly made in the outer housing 116, it causes a serious mechanical problem such as braking performance, wear or seizure of the brake disc 124 due to overheating. Conventional power trains of heavy equipment equipped with multiple damping brake devices suffer from the problems mentioned above. Therefore, problems such as frequent failures and shortening of life due to poor cooling of the brake disc 124 have been raised.

위와 같은 문제에 대한 본 발명의 목적은, 다판습식브레이크장치를 구비하는 유성기어 동력전달장치에 있어서, 외부하우징 내부에 설치되는 유성기어장치와 브레이크장치 간의 냉각용 오일의 순환을 원활하게 하여 냉각을 효율적으로 할 수 있도록 하여 장치의 내구성을 향상시키는 것에 있다. An object of the present invention for the above problems, in the planetary gear power transmission device having a multi-panel wet type brake device, the cooling by smoothing the circulation of the cooling oil between the planetary gear device and the brake device installed inside the outer housing. In order to make it efficient, it is to improve the durability of an apparatus.

위와 같은 목적은, 차동기어로부터 조향장치를 거쳐 회전력을 전달받는 구동축; 상기 구동축에 축결합되는 선기어; 상기 선기어와 치합되는 유성기어; 상기 조향장치의 너클하우징 외부에 끼워지며 베어링에 의해 회전 가능하게 지지되는 캐리어허브휠; 일측 내부에는 상기 유성기어가 상기 선기어와 치합되게 설치되고 타측은 상기 캐리어허브휠의 외주에 끼워져 고정되는 외부하우징; 일측은 상기 유성기어와 내접되며, 타측은 상기 너클하우징의 외주에 스플라인으로 결합되는 링기어부재를 포함하는 유성기어장치; The above object, the drive shaft receives a rotational force through the steering device from the differential gear; A sun gear axially coupled to the drive shaft; A planetary gear meshed with the sun gear; A carrier hub wheel fitted to an outside of the knuckle housing of the steering device and rotatably supported by a bearing; An outer housing in which the planetary gear is installed to be engaged with the sun gear and the other side of which is fitted to an outer circumference of the carrier hub wheel; A planetary gear device having one side inscribed with the planetary gear and the other side including a ring gear member coupled to a spline at an outer circumference of the knuckle housing;

상기 유성기어장치의 외부하우징과 조향장치 사이에 설치되는 것으로서, 상기 너클하우징 및 상기 캐리어허브휠에 교번하여 고정되는 다수의 브레이크디스크, 상기 링기어부재에 탄성적으로 유동될 수 있게 설치되어 브레이크작동유압에 의해 상기 브레이크디스크를 압착함으로써 제동되게끔 하기 위한 피스톤부재를 포함하는 브레이크장치로 구성되는 중장비의 동력전달장치에 있어서;It is installed between the external housing and the steering device of the planetary gear device, a plurality of brake disks alternately fixed to the knuckle housing and the carrier hub wheel, the brake gear is installed to be elastically flowable to the ring gear member A power transmission device for heavy equipment, comprising: a brake device including a piston member for braking by pressing the brake disc by hydraulic pressure;

상기 브레이크장치와 상기 유성기어장치의 내부 공간 사이에서 냉각용 오일이 원활하게 유동될 수 있도록, 상기 링기어부재는 원주방향을 따라 다수의 오일유동홈이 패여 있는 것을 특징으로 하는 다판습식브레이크장치를 구비하는 중장비의 동력전달장치에 의해 달성된다.The ring gear member has a plurality of oil flow grooves in the circumferential direction so that cooling oil flows smoothly between the brake device and the inner space of the planetary gear device. It is achieved by a power transmission device of heavy equipment.

이하 본 발명의 실시예를 명세서에 첨부된 도면을 참조하여 더욱 상세하게 설명한다. 도 3은 본 발명에 의한 중장비의 유성동력전달장치의 개략 단면도이며, 도 4는 그 일부 구성요소인 링기어부재의 사시도이다. 도 5는 피스톤부재의 사시도이다. Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Figure 3 is a schematic cross-sectional view of the planetary power transmission device of the heavy equipment according to the present invention, Figure 4 is a perspective view of a ring gear member which is a part of its components. 5 is a perspective view of the piston member.

본 발명의 중장비용 동력전달장치는 엔진을 포함한 동력전달장치중 말단, 즉 차륜에 인접되게 장착되는 부분이다. 차동기어장치로 전달된 엔진의 구동력은 회전방향이 수직으로 전환되고 감속에 의해 회전력이 증가된 상태로 양쪽 차륜을 향해 대칭적으로 설치되는 차륜축(A)으로 전달된다. 차륜축(A)의 회전력은 조향장치(2)를 통과하여 유성기어장치(4)에 전달된다. 유성기어장치(4)는 차륜축(A)의 회전력을 증가시켜 캐리어허브휠(6)에 전달한다. 캐리어허브휠(6)에 차륜(미도시됨)이 연결된다. 캐리어허브휠(6)은 베어링(8)에 의해 너클하우징(10)의 외부에 회전 가능하게 지지된다. 너클하우징(10)은 조향장치와 관련된다.Power transmission device for heavy equipment of the present invention is a portion of the power transmission device including the engine is mounted adjacent to the end, that is, the wheel. The driving force of the engine transmitted to the differential gear device is transmitted to the wheel shaft A which is installed symmetrically toward both wheels in a state in which the rotation direction is vertically changed and the rotation force is increased by deceleration. The rotational force of the wheel shaft A is transmitted to the planetary gear device 4 through the steering device 2. The planetary gear device 4 increases the rotational force of the wheel shaft A and transmits it to the carrier hub wheel 6. A wheel (not shown) is connected to the carrier hub wheel 6. The carrier hub wheel 6 is rotatably supported on the outside of the knuckle housing 10 by a bearing 8. The knuckle housing 10 is associated with a steering device.

조향장치(2)는 너클베어링 구조로서 본 발명과는 관련이 적으므로 상세한 설명을 하지 않는다. 조향장치(2)의 출력축이 되는 구동축(2)은 너클하우징(10) 내부를 통하여 외부로 돌출된다. 유성기어장치(4)의 구성요소인 선기어(14)가 너클하우징(10)으로부터 돌출된 구동축(12)의 단부에 축결합된다. The steering apparatus 2 is a knuckle bearing structure and is not related to the present invention, and thus will not be described in detail. The drive shaft 2 serving as the output shaft of the steering apparatus 2 protrudes outward through the knuckle housing 10. The sun gear 14, which is a component of the planetary gear device 4, is axially coupled to the end of the drive shaft 12 protruding from the knuckle housing 10.

유성기어장치(4)는 구동축(12)에 연결된 선기어(14), 외부하우징(16)의 내부에 그와 일체로 형성되며 선기어(14)와 치합하여 유성운동을 하게 되는 유성기어(18), 및 유성기어(18)와 치합되는 링기어부재(20)로 구성된다. 링기어부재(20)는 일측이 너클하우징(10)의 외부에 스플라인으로 결합하여 고정된다. 외부하우징(16)은 캐리어허브휠(06)에 기밀을 유지하며 고정되어 그와 함께 회전된다. The planetary gear device 4 is a sun gear 14 connected to the drive shaft 12, the planetary gear 18 is formed integrally with the inside of the outer housing 16 and meshes with the sun gear 14 to make a planetary motion, And a ring gear member 20 engaged with the planetary gear 18. The ring gear member 20 is fixed to one side by coupling with a spline on the outside of the knuckle housing 10. The outer housing 16 is secured to the carrier hub wheel 06 and fixed and rotated therewith.

유성기어장치(4)와 조향장치(2) 사이에는 (다판습식)브레이크장치(2)가 설치 된다. 브레이크장치(22)는 다수의 브레이크디스크(24) 및 복잡한 유로(26)를 포함한다. 브레이크장치(22)는 유성기어장치의 외부하우징(16)과 조향장치(2) 사이에 설치되는 것으로서, 너클하우징(10) 및 캐리어허브휠(6)에 교번하여 고정되는 다수의 브레이크디스크(24), 링기어부재(20)에 탄성적으로 유동될 수 있게 설치되어 브레이크작동유압에 의해 브레이크디스크(24)를 압착함으로써 제동되게끔 하기 위한 환형상의 피스톤부재(28, 도 5 참조)를 포함한다. Between the planetary gear device 4 and the steering device 2, a (multiple wet type) brake device 2 is provided. The brake device 22 includes a plurality of brake discs 24 and a complicated flow path 26. The brake device 22 is installed between the outer housing 16 and the steering device 2 of the planetary gear device and includes a plurality of brake disks 24 alternately fixed to the knuckle housing 10 and the carrier hub wheel 6. And an annular piston member 28 (refer to FIG. 5) to be elastically flowable to the ring gear member 20 so as to be braked by compressing the brake disc 24 by the brake operating hydraulic pressure. .

브레이크작동유는 너클하우징(10) 및 링기어부재(20)에 마련된 유로(126)를 지나 피스톤부재(128)에 작용한다. 그러면 피스톤부재(128)는 도면상 우측으로 기동하면서 다수의 브레이크디스크(24)를 압착하게 된다. 브레이크디스크(24)가 서로 압착되면 너클하우징(10)과 캐리어허브휠(6)이 서로 고정되며 따라서 캐리어허브휠(6)에 설치되는 차륜에 제동이 가해지는 것이다. The brake hydraulic fluid acts on the piston member 128 through the passage 126 provided in the knuckle housing 10 and the ring gear member 20. The piston member 128 then squeezes the plurality of brake discs 24 while activating to the right in the drawing. When the brake disc 24 is pressed together, the knuckle housing 10 and the carrier hub wheel 6 are fixed to each other, and thus braking is applied to the wheels installed on the carrier hub wheel 6.

위의 내용 이상의 설명은 본 발명의 이해를 위한 것일 뿐 본 발명의 본지와는 관계가 적기 때문에 더 이상의 상세한 설명을 생략한다. 본 발명의 핵심은 외부하우징(16) 내부에 충전되는 냉각용 오일이 유동할 수 있는 공간을 넓게 확보함으로써 브레이크디스크(24)에서 발생하는 열을 원활하게 분산시킬 수 있도록 하는 구성에 있다. The above description is only for the understanding of the present invention, and thus the detailed description is omitted since it has little relationship with the present invention. The core of the present invention is to ensure a wide space for the flow of the cooling oil to be filled in the outer housing 16 can be smoothly distributed heat generated from the brake disk (24).

외부하우징(16)의 단면적을 가장 많이 차지함으로써 오일의 순환을 방해하는 요소가 링기어부재(20)이다. 때로는 링기어부재(20)에 포개지도록 설치되는 피스톤부재(28) 또한 오일순환을 방해하는 요소가 될 수 있다. 그러므로 피스톤부재(28) 또한 링기어부재(20)와 마찬가지로 본 발명의 적용대상이 될 수 있다. The ring gear member 20 is an element that occupies most of the cross-sectional area of the outer housing 16 and thus prevents the circulation of oil. Sometimes the piston member 28, which is installed to be superimposed on the ring gear member 20, may also be an element that hinders oil circulation. Therefore, the piston member 28 may also be applied to the present invention as the ring gear member 20.

도 4에 도시된 바와 같이 링기어부재(20)는 환형상으로서, 일측으로는 너클하우징(10)에 끼워져 고정시키기 위한 스플라인공(20b)이 형성되어 있고, 타측 내주면에는 유성기어와의 치합을 위한 링기어(20c)가 형성되어 있다. 스플라인공(20b)의 직경은 링기어(20c)의 내경보다 상대적으로 작다. 링기어부재(20)는 원주방향을 따라 제1 플랜지(30)가 마련되며 제1 플랜지(30)에는 다수의 볼트공(32)이 일정한 간격으로 타공되어 있다. 이 볼트공(32)은 피스톤부재(28)를 탄성적으로 유동될 수 있게 설치하기 위한 것이다. As shown in FIG. 4, the ring gear member 20 has an annular shape, and a spline hole 20b is formed at one side to be fitted into the knuckle housing 10 and fixed thereto, and the other inner circumferential surface is engaged with the planetary gear. The ring gear 20c for this is formed. The diameter of the spline hole 20b is relatively smaller than the inner diameter of the ring gear 20c. The ring gear member 20 is provided with a first flange 30 along the circumferential direction, and a plurality of bolt holes 32 are perforated at regular intervals in the first flange 30. This bolt hole 32 is for installing the piston member 28 to be elastically flowable.

본 발명의 실시예에 의하면 링기어부재(20)에는 그의 원주방향을 따라 다수의 제1 오일유동홈(34)이 패여 있다. 이 제1 오일유동홈(34)은 반원형태이나 그 형태에 구속받지는 아니한다.According to the embodiment of the present invention, the ring gear member 20 is provided with a plurality of first oil flow grooves 34 along its circumferential direction. The first oil flow groove 34 is not semicircular or constrained by the shape.

한편, 링기어부재(20)와 포개지도록 끼워져 설치되는 피스톤부재(28)는 외형이 링기어부재(20)와 동일하며 제2 플랜지(36)가 설치된다. 제2 플랜지(36) 또한 상기 볼트공(32)과 동일한 위치에 다수의 볼트관통공(38)이 타공되어 있다. 또한, 링기어부재(20)와 마찬가지의 제2 오일유동홈(40)이 패여 있다. 언급한 것처럼 피스톤부재(28)는 브레이크디스트(24)의 전면을 고르게 가압하기 위해 넓은 면적을 가지며 나아가 탄성 복귀수단(스프링)을 설치하기 위해 제2 플랜지(36)를 필요로 하는데, 이에 의해 총면적이 오일의 유동을 방해할 정도까지 이르게 되는 것이다. 그러므로 본 발명의 목적달성을 위해 제2 오일유동홈(40)을 필요로 하는 것이다. On the other hand, the piston member 28 is installed so as to overlap the ring gear member 20 is the same as the ring gear member 20, the second flange 36 is installed. The second flange 36 is also provided with a plurality of bolt through holes 38 at the same position as the bolt holes 32. In addition, the second oil flow groove 40 similar to the ring gear member 20 is recessed. As mentioned, the piston member 28 has a large area to evenly press the front face of the brake disc 24 and further requires a second flange 36 to install the resilient return means (spring). This will lead to the disturbance of the oil flow. Therefore, the second oil flow groove 40 is required to achieve the object of the present invention.

위와 같은 본 발명의 목적을 달성하기 위하여 링기어부재 및/또는 피스톤부재(이하, 링기어부재로 한다)의 형상만을 변형시킬 것이 아니라 외부하우징(16)에도 약간의 형태변형을 시킬 수 있을 것이다. 즉, 도 3의 A-A선을 따라 취한 일부단면인 도 6에 도시된 것처럼 링기어부재(20)가 설치되는 지점의 외부하우징(16)의 단면형상을 요철 형태로 하여 제3 오일유동홈(42)을 마련하는 방법도 충분히 고려될 수 있다. 이렇게 하면, 링기어부재에 의한 제1 오일유동홈(34)과 더불어 외부하우징에 의한 제3 오일유동홈(42) 또한 냉각용 오일의 원활한 유동을 도울 수 있게 된다. In order to achieve the object of the present invention as described above, not only the shape of the ring gear member and / or the piston member (hereinafter referred to as the ring gear member) may be slightly modified in the outer housing 16. That is, the third oil flow groove 42 having a cross-sectional shape of the outer housing 16 at the point where the ring gear member 20 is installed, as shown in FIG. ) May also be fully considered. In this way, the third oil flow groove 42 by the outer housing as well as the first oil flow groove 34 by the ring gear member can also help the smooth flow of the cooling oil.

당업자는 이를 빌어 오일유동홈은 외부하우징 또는 링기어부재 어느 일측에 선택적으로 마련될 수도 있음을 짐작할 수 있을 것이다. Those skilled in the art will appreciate that the oil flow groove may be selectively provided on either side of the outer housing or the ring gear member.

한편, 조향장치(2)는 본 발명에 있어서의 필수적 구성요소는 아니다. 유성기어장치(4) 및 브레이크장치(22)와는 달리, 조향장치는 네 개의 차륜에 모두 설치되지 않기 때문이다. 조향장치가 없는 경우 위에서 설명된 너클하우징은 엑슬하우징이 되어야 할 것이다. On the other hand, the steering apparatus 2 is not an essential component in the present invention. This is because, unlike the planetary gear device 4 and the brake device 22, the steering device is not installed in all four wheels. Without steering, the knuckle housing described above would have to be an axle housing.

위와 같은 구성에 의하면, 외부하우징 내부에는 냉각용 오일의 유동공간이넓게 확보된다. 따라서 오일의 순환정체 및 이에 따른 브레이크디스크의 과열 문제가 상당히 감소되게 된다. 결과적으로 다판습식브레이크장치의 내구성이 향상되며 상대적으로 제동성능을 양호하게 유지할 수 있게 된다. According to the configuration as described above, the flow space of the cooling oil is secured inside the outer housing. Therefore, the circulation of oil and consequent overheating of the brake disc are considerably reduced. As a result, the durability of the multi-vacuum brake device can be improved and relatively good braking performance can be maintained.

Claims (2)

차동기어로부터 조향장치(2)를 거쳐 회전력을 전달받는 구동축(12); 상기 구동축(12)에 축결합되는 선기어(14); 상기 선기어(14)와 치합되는 유성기어(18); 상기 조향장치(2)의 너클하우징(10) 외부에 끼워지며 베어링(8)에 의해 회전 가능하게 지지되는 캐리어허브휠(6); 일측 내부에는 상기 유성기어(18)가 상기 선기어(14)와 치합되게 설치되고 타측은 상기 캐리어허브휠(6)의 외주에 끼워져 고정되는 외부하우징(16); 일측은 상기 유성기어(18)와 내접되며, 타측은 상기 너클하우징(10)의 외주에 스플라인으로 결합되는 링기어부재(20)를 포함하는 유성기어장치(4); A drive shaft 12 which receives a rotational force from the differential gear via the steering apparatus 2; A sun gear 14 axially coupled to the drive shaft 12; A planetary gear 18 engaged with the sun gear 14; A carrier hub wheel 6 fitted outside the knuckle housing 10 of the steering apparatus 2 and rotatably supported by a bearing 8; An outer housing (16) installed at one side of the planetary gear (18) to be engaged with the sun gear (14), and the other side of the planetary gear (18) fitted to an outer circumference of the carrier hub wheel (6); One side is inscribed with the planetary gear (18), the other side planetary gear device including a ring gear member (20) coupled to the outer periphery of the knuckle housing (10); 상기 외부하우징(16)과 조향장치(2) 사이에 설치되는 것으로서, 상기 너클하우징(10) 및 상기 캐리어허브휠(6)에 교번하여 고정되는 다수의 브레이크디스크(24), 상기 링기어부재(20)에 탄성적으로 유동될 수 있게 설치되어 브레이크작동유압에 의해 상기 브레이크디스크(24)를 압착함으로써 제동되게끔 하기 위한 피스톤부재(28)를 포함하는 브레이크장치(22)로 구성되는 중장비의 동력전달장치에 있어서;A plurality of brake discs 24 and the ring gear member which are installed between the outer housing 16 and the steering apparatus 2 and alternately fixed to the knuckle housing 10 and the carrier hub wheel 6. 20) is installed to be elastically flowable, the power of the heavy equipment consisting of a brake device 22 comprising a piston member 28 for braking by pressing the brake disk 24 by the brake operating hydraulic pressure In the delivery device; 상기 브레이크장치(22)와 상기 유성기어장치(4)의 내부 공간 사이에서 냉각용 오일(L)이 원활하게 유동될 수 있도록, 상기 링기어부재(20) 및 상기 피스톤부재(28)는 원주방향을 따라 다수의 제1,2 오일유동홈(34,40)이 패여 있는 것을 특징으로 하는, 다판습식브레이크장치를 구비하는 중장비의 동력전달장치.The ring gear member 20 and the piston member 28 are circumferentially oriented so that the cooling oil L can smoothly flow between the brake device 22 and the inner space of the planetary gear device 4. A plurality of first and second oil flow groove (34,40) along the, characterized in that the power transmission device of heavy equipment having a multi-plate wet breaker device. 제1항에 있어서, 상기 링기어부재(20)가 설치되는 지점의 상기 외부하우징(16)의 단면 형상을 요철 형태로 돌출되게 함으로써, 제3 오일유동홈(42)이 마련되는 것을 특징으로 하는, 다판습식브레이크장치를 구비하는 중장비의 동력전달장치.The third oil flow groove 42 is provided by projecting the cross-sectional shape of the outer housing 16 at the point where the ring gear member 20 is installed in the form of irregularities. , Power transmission device of heavy equipment equipped with a multi-panel wet brake device.
KR1020070052018A 2007-05-29 2007-05-29 Wheel driving apparatus of heavy equipment having wet type brake system KR100854581B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573827A (en) * 2013-11-08 2014-02-12 无锡威孚精密机械制造有限责任公司 Needle roller lantern ring of hub reduction gear

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US4407382A (en) 1980-04-05 1983-10-04 Zahnradfabrik Friedrichshafen, Aktiengesellschaft Wheel head for driving wheels of vehicles
US4562903A (en) 1982-11-03 1986-01-07 So.M.A. Europe Transmissions Wheel hub with integral brake and reducer
US4667527A (en) 1982-03-27 1987-05-26 Zahnradfabrik Friedrichshafen Ag Spring-loaded brake with pressure-medium-operable lifting set
KR930011084B1 (en) * 1985-11-29 1993-11-20 데이나 코오포레이션 Planetary wheel end with wet brake
EP1234993A1 (en) 2001-02-23 2002-08-28 Dana Italia S.p.A Wheel hub with integrated planetary gear and multiple disc brake
KR100730918B1 (en) 2006-07-06 2007-06-21 성보공업주식회사 Hub reduction drive line by planetary gear
KR100749313B1 (en) 2006-03-14 2007-08-14 성보공업주식회사 Axle assembly with steering device & intergrated planetary gear and multiple disc brake of off-road wheel type construction equipment

Patent Citations (7)

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Publication number Priority date Publication date Assignee Title
US4407382A (en) 1980-04-05 1983-10-04 Zahnradfabrik Friedrichshafen, Aktiengesellschaft Wheel head for driving wheels of vehicles
US4667527A (en) 1982-03-27 1987-05-26 Zahnradfabrik Friedrichshafen Ag Spring-loaded brake with pressure-medium-operable lifting set
US4562903A (en) 1982-11-03 1986-01-07 So.M.A. Europe Transmissions Wheel hub with integral brake and reducer
KR930011084B1 (en) * 1985-11-29 1993-11-20 데이나 코오포레이션 Planetary wheel end with wet brake
EP1234993A1 (en) 2001-02-23 2002-08-28 Dana Italia S.p.A Wheel hub with integrated planetary gear and multiple disc brake
KR100749313B1 (en) 2006-03-14 2007-08-14 성보공업주식회사 Axle assembly with steering device & intergrated planetary gear and multiple disc brake of off-road wheel type construction equipment
KR100730918B1 (en) 2006-07-06 2007-06-21 성보공업주식회사 Hub reduction drive line by planetary gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573827A (en) * 2013-11-08 2014-02-12 无锡威孚精密机械制造有限责任公司 Needle roller lantern ring of hub reduction gear

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