KR20120121271A - In-wheel working device - Google Patents

In-wheel working device Download PDF

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Publication number
KR20120121271A
KR20120121271A KR1020110039151A KR20110039151A KR20120121271A KR 20120121271 A KR20120121271 A KR 20120121271A KR 1020110039151 A KR1020110039151 A KR 1020110039151A KR 20110039151 A KR20110039151 A KR 20110039151A KR 20120121271 A KR20120121271 A KR 20120121271A
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KR
South Korea
Prior art keywords
planetary gear
gear
ring
wheel
hub
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Application number
KR1020110039151A
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Korean (ko)
Inventor
신경호
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현대모비스 주식회사
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Priority to KR1020110039151A priority Critical patent/KR20120121271A/en
Priority to CN2012101254472A priority patent/CN102756641A/en
Publication of KR20120121271A publication Critical patent/KR20120121271A/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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0046—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the vehicle body, i.e. moving independently from the wheel axle
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/44—Wheel Hub motors, i.e. integrated in the wheel hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/92—Hybrid vehicles
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • F16H2001/326—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear comprising a carrier with linear guiding means guiding at least one orbital gear
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Retarders (AREA)

Abstract

PURPOSE: An in-wheel drive device is provided to reduce the size of a wheel member by using a decelerator performing high deceleration ratio. CONSTITUTION: An in-wheel drive device(1) comprises a motor unit(10), a deceleration unit(20), a wheel member(60), a hub inner race(50), and a hub outer race(54). The motor unit generates torque for the rotation of the wheel member. The deceleration unit is connected to the driving shaft of a motor unit. The deceleration unit decelerates by using a dual step ring gear and a planetary gear. The wheel member is connected to the output shaft(46) of the deceleration unit. The hub inner race is fixed to the wheel member. The hub inner wheel comprises an inner through hole. The hub outer wheel supports the hub inner wheel.

Description

인휠 구동장치{IN-WHEEL WORKING DEVICE}In-wheel drive {IN-WHEEL WORKING DEVICE}

본 발명은 인휠 구동장치에 관한 것으로서, 보다 상세하게는, 감속비를 향상시켜 휠부재의 사이즈를 감소시킬 수 있는 인휠 구동장치에 관한 것이다.
The present invention relates to an in-wheel drive device, and more particularly, to an in-wheel drive device that can reduce the size of the wheel member by improving the reduction ratio.

화석연료가 고갈되어 감에 따라 휘발유, 경유 등과 같은 화석연료를 사용하는 차량 대신에 배터리에 저장된 전기 에너지를 이용하여 모터를 구동하는 전기 자동차의 개발이 이루어지고 있다.As fossil fuels become depleted, electric vehicles are being developed that use electric energy stored in batteries instead of vehicles using fossil fuels such as gasoline and light oil to drive the motor.

전기 자동차는, 충전 배터리에 저장된 전기 에너지만을 이용하여 모터를 구동하는 순수 전기 차량, 광전지를 이용하여 모터를 구동하는 태양전지 차량, 수소연료를 사용하는 연료전지를 이용하여 모터를 구동하는 연료전지 차량, 화석연료를 이용하여 엔진을 구동하고 전기를 이용하여 모터를 구동함으로써 엔진과 모터를 병용하는 하이브리드 차량 등으로 구분된다.The electric vehicle includes a pure electric vehicle driving a motor using only electric energy stored in a rechargeable battery, a solar battery vehicle driving a motor using a photocell, a fuel cell vehicle driving a motor using a fuel cell using hydrogen fuel , And a hybrid vehicle that uses an engine and a motor by driving an engine using fossil fuel and driving the motor using electricity.

일반적으로, 인휠 구동장치는 전기 자동차와 같이 전기를 동력원으로 사용하는 자동차에 사용되는 기술로서, 가솔린 또는 디젤 자동차에서의 엔진과 미션 및 구동축을 통한 동력 전달에 의해 바퀴가 회전 구동하는 방식과는 달리, 좌우의 구동륜 또는 좌우 및 전후 4개의 구동륜 내부에 배치되는 모터에 의해 동력이 휠에 직접 전달되는 기술이다.In general, in-wheel drive is a technology used in a vehicle that uses electricity as a power source, such as an electric vehicle, unlike a method in which wheels are driven rotationally by transmission of power through an engine and a mission and a drive shaft in a gasoline or diesel vehicle. This is a technology in which power is directly transmitted to a wheel by a motor disposed inside the left and right driving wheels or the four driving wheels.

상기한 기술구성은 본 발명의 이해를 돕기 위한 배경기술로서, 본 발명이 속하는 기술분야에서 널리 알려진 종래기술을 의미하는 것은 아니다.
The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

종래의 인휠 구동장치는 모터반경을 크게 하여 감속기 없이 구동토크의 증가가 이루어지지만, 이로 인해 휠 사이즈가 커지는 문제점이 있다. 따라서, 이를 개선할 필요성이 요청된다.In the conventional in-wheel drive device, the driving radius is increased without increasing the motor radius by increasing the motor radius, but this causes a problem in that the wheel size becomes large. Therefore, there is a need to improve this.

본 발명은 상기와 같은 문제점을 개선하기 위해 안출된 것으로서, 고감속비를 구현하는 감속기를 설치하여 휠부재의 사이즈를 감소시킬 수 있는 인휠 구동장치를 제공하는데 그 목적이 있다.
The present invention has been made in order to improve the above problems, an object of the present invention is to provide an in-wheel drive device that can reduce the size of the wheel member by installing a reducer that implements a high reduction ratio.

본 발명에 따른 인휠 구동장치는: 동력이 발생되는 모터부와, 모터부의 구동축과 연결되며 2단의 링기어에 유성기어가 맞물려서 감속이 이루어지는 감속부와, 감속부의 출력축에 연결되며 외측 둘레를 따라 타이어가 설치된 휠부재와, 휠부재에 고정되며 출력축이 관통 설치되는 허브내륜 및 허브내륜을 지지하는 허브외륜을 포함한다.The in-wheel drive device according to the present invention includes: a motor portion generating power, a driving shaft connected to the motor shaft, and a planetary gear meshed with two-stage ring gears to decelerate, and connected to an output shaft of the reduction shaft, And a wheel member provided with a tire, and a hub inner ring fixed to the wheel member and having an output shaft penetrated therein, and a hub outer ring supporting the hub inner ring.

또한 감속부는, 구동축에 연결되는 썬기어와, 썬기어에 치합되는 제1유성기어와, 링 형상으로 형성되어 제1유성기어에 치합되며 회전이 구속되는 제1링기어와, 제1유성기어와 동축상에 설치되며 제1유성기어와 동일한 잇수를 가지는 제2유성기어 및 링 형상으로 형성되어 제2유성기어에 치합되며 회전이 허용되는 제2링기어를 포함하는 것이 바람직하다.The reduction unit may include a sun gear connected to the drive shaft, a first planetary gear meshed with the sun gear, a first ring gear formed in a ring shape and engaged with the first planetary gear and constrained to rotate, and a first planetary gear. It is preferable to include a second planetary gear which is installed coaxially and has the same number of teeth as the first planetary gear, and a second ring gear which is formed in a ring shape and is engaged with the second planetary gear and is allowed to rotate.

또한 제1링기어와 제2링기어의 잇수 차이는, 상기 제1유성기어와 상기 제2유성기어의 개수에 비례하는 것이 바람직하다.In addition, the number of teeth of the first ring gear and the second ring gear is preferably proportional to the number of the first planetary gear and the second planetary gear.

또한 본 발명은, 제1유성기어와 제2유성기어의 개수는 4개이며, 제1링기어와 제2링기어의 잇수 차이는 4의 배수인 것이 바람직하다.In the present invention, the number of the first planetary gear and the second planetary gear is four, and the number of teeth of the first ring gear and the second ring gear is preferably a multiple of four.

또한 구동축과 휠부재의 회전중심은 동축상에 위치하는 것이 바람직하다.In addition, the rotation center of the drive shaft and the wheel member is preferably located coaxially.

또한 본 발명은, 허브내륜과 허브외륜의 사이에 설치되어 마찰을 감소시키는 허브베어링을 더 포함하는 것이 바람직하다.
In addition, the present invention preferably further comprises a hub bearing provided between the hub inner ring and the hub outer ring to reduce friction.

본 발명에 따른 인휠 구동장치는, 제1유성기어에서 1차 감속이 이루어지며, 제2유성기어와 맞물리는 제2링기어에서 2차 감속이 이루어지므로, 감속비를 향상시켜 휠부재의 사이즈를 감소시킬 수 있으며, 구동토크의 증가에 의해 모터의 구동력을 향상시킬 수 있다.
In-wheel drive device according to the present invention, the first deceleration is made in the first planetary gear, the second deceleration is made in the second ring gear meshing with the second planetary gear, thereby improving the reduction ratio to reduce the size of the wheel member The driving force of the motor can be improved by increasing the driving torque.

도 1은 본 발명의 일 실시예에 따른 인휠 구동장치를 개략적으로 나타내는 단면도이다.
도 2는 본 발명의 일 실시예에 따른 감속부를 개략적으로 도시한 사시도이다.
도 3은 본 발명의 일 실시예에 따른 제1유성기어와 제1링기어의 결합상태를 개략적으로 도시한 평면도이다.
도 4는 본 발명의 일 실시예에 따른 제2유성기어와 제2링기어의 결합상태를 개략적으로 도시한 평면도이다.1 is a cross-sectional view schematically showing an in-wheel drive apparatus according to an embodiment of the present invention.
2 is a perspective view schematically showing a deceleration unit according to an embodiment of the present invention.
3 is a plan view schematically illustrating a coupling state between a first planetary gear and a first ring gear according to an exemplary embodiment of the present invention.
4 is a plan view schematically illustrating a coupling state between a second planetary gear and a second ring gear according to an exemplary embodiment of the present invention.

이하, 첨부된 도면들을 참조하여 본 발명에 따른 인휠 구동장치의 일 실시예를 설명한다. 설명의 편의를 위해 전기자동차에 사용되는 인휠 구동장치를 예로 들어 설명한다. 이 과정에서 도면에 도시된 선들의 두께나 구성요소의 크기 등은 설명의 명료성과 편의상 과장되게 도시되어 있을 수 있다. 또한, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례에 따라 달라질 수 있다. 그러므로, 이러한 용어들에 대한 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.
Hereinafter, with reference to the accompanying drawings will be described an embodiment of the in-wheel drive apparatus according to the present invention. For convenience of description, an in-wheel drive device used in an electric vehicle will be described as an example. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

도 1은 본 발명의 일 실시예에 따른 인휠 구동장치를 개략적으로 나타내는 단면도이며, 도 2는 본 발명의 일 실시예에 따른 감속부를 개략적으로 도시한 사시도이며, 도 3은 본 발명의 일 실시예에 따른 제1유성기어와 제1링기어의 결합상태를 개략적으로 도시한 평면도이며, 도 4는 본 발명의 일 실시예에 따른 제2유성기어와 제2링기어의 결합상태를 개략적으로 도시한 평면도이다.1 is a cross-sectional view schematically showing an in-wheel drive apparatus according to an embodiment of the present invention, Figure 2 is a perspective view schematically showing a reduction unit according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention 4 is a plan view schematically illustrating a coupling state between a first planetary gear and a first ring gear, and FIG. 4 schematically illustrates a coupling state between a second planetary gear and a second ring gear according to an embodiment of the present invention. Top view.

도 1에 도시된 바와 같이, 본 발명의 일 실시예에 따른 인휠 구동장치(1)는, 동력이 발생되는 모터부(10)와, 모터부(10)의 구동축(17)과 연결되며 2단의 링기어에 유성기어가 맞물려서 감속이 이루어지는 감속부(20)와, 감속부(20)의 출력축(46)에 연결되며 외측 둘레를 따라 타이어(70)가 설치된 휠부재(60)와, 휠부재(60)에 고정되며 출력축(46)이 관통 설치되는 허브내륜(50) 및 허브내륜(50)을 지지하는 허브외륜(54)을 포함한다.As shown in FIG. 1, the in-wheel driving apparatus 1 according to an exemplary embodiment of the present invention is connected to a motor unit 10 in which power is generated and a drive shaft 17 of the motor unit 10, and is provided in two stages. And a wheel member 60 connected to an output gear 46 of the deceleration part 20 and a tire 70 installed along an outer circumference of the planetary gear in engagement with a ring gear of the gearhead. The hub inner ring 50 is fixed to 60 and the output shaft 46 is installed therethrough, and the hub outer ring 54 supporting the hub inner ring 50.

휠부재(60)를 회전시키는 동력을 발생하는 모터부(10)는, 회전자(16)와 고정자(15)를 감싸는 모터하우징(11) 및 모터하우징(11)에 결합되는 커버부재(13)를 포함한다.The motor unit 10 generating power for rotating the wheel member 60 includes a motor housing 11 surrounding the rotor 16 and the stator 15 and a cover member 13 coupled to the motor housing 11. It includes.

모터하우징(11)의 일측(도 1기준 좌측)은 개구되어 원통 형상으로 형성되며, 이러한 모터하우징(11)의 일측에 커버부재(13)가 결합된다.One side of the motor housing 11 (left of FIG. 1) is opened to form a cylindrical shape, and the cover member 13 is coupled to one side of the motor housing 11.

모터하우징(11)의 내측에는 고정자(15)가 설치되며, 이러한 고정자(15)와 이격되어 회전자(16)가 설치된다.The stator 15 is installed inside the motor housing 11, and the rotor 16 is spaced apart from the stator 15.

회전자(16)는 구동축(17)과 연결되므로, 회전자(16)의 회전에 따라 구동축(17)도 회전된다.Since the rotor 16 is connected to the drive shaft 17, the drive shaft 17 is also rotated in accordance with the rotation of the rotor 16.

구동축(17)은 감속부(20)에 구비된 썬기어(24)에 연결되므로, 모터부(10)의 동력이 감속부(20)로 전달된다.Since the drive shaft 17 is connected to the sun gear 24 provided in the reduction unit 20, the power of the motor unit 10 is transmitted to the reduction unit 20.

도 1 내지 도 4에 도시된 바와 같이, 감속부(20)는, 모터부(10)의 구동축(17)과 연결되며 2단의 링기어에 유성기어가 맞물려서 감속이 이루어지는 기술사상 안에서 다양한 형상으로 형성될 수 있다.As shown in FIGS. 1 to 4, the reduction unit 20 is connected to the drive shaft 17 of the motor unit 10 and has various shapes within the technical concept in which the planetary gear is engaged with the two-stage ring gear to reduce the speed. Can be formed.

일 실시예에 따른 감속부(20)는, 구동축(17)에 연결되는 썬기어(24)와, 썬기어(24)에 치합되는 제1유성기어(30)와, 링 형상으로 형성되어 제1유성기어(30)에 치합되며 회전이 구속되는 제1링기어(26)와, 제1유성기어(30)와 동축상에 설치되며 제1유성기어(30)와 동일한 잇수를 가지는 제2유성기어(32) 및 링 형상으로 형성되어 제2유성기어(32)에 치합되며 회전이 허용되는 제2링기어(42)를 포함한다.The reduction unit 20 according to the exemplary embodiment includes a sun gear 24 connected to the drive shaft 17, a first planetary gear 30 engaged with the sun gear 24, and a ring shape. The first planetary gear 26, which is engaged with the planetary gear 30 and whose rotation is restricted, is installed coaxially with the first planetary gear 30 and the second planetary gear having the same number of teeth as the first planetary gear 30. And a second ring gear 42 formed in a ring shape and engaged with the second planetary gear 32 and allowing rotation thereof.

모터부(10)의 구동축(17)과 연결되어 회전되는 썬기어(24)에 복수 개의 제1유성기어(30)가 치합되며, 이러한 제1유성기어(30)의 외측을 감싸며 제1링기어(26)가 설치된다.A plurality of first planetary gears 30 are engaged with the sun gear 24 which is connected to the drive shaft 17 of the motor unit 10 and rotates, and surrounds the outer side of the first planetary gear 30 and the first ring gear. 26 is installed.

구동축(17)과 출력축(46)의 회전이 용이하게 이루어지도록, 감속부(20)의 내측에 기어베어링(28)이 설치된다.The gear bearing 28 is installed inside the reduction unit 20 so that the drive shaft 17 and the output shaft 46 can be easily rotated.

제1링기어(26)는 감속부(20)의 외형을 형성하는 감속케이스(22)에 고정되므로, 제1링기어(26)의 회전은 구속된다.Since the first ring gear 26 is fixed to the reduction case 22 forming the outer shape of the reduction unit 20, the rotation of the first ring gear 26 is constrained.

제1유성기어(30)가 자전을 하면서 썬기어(24)의 둘레를 따라 공전하므로, 1차 감속이 이루어진다.Since the first planetary gear 30 rotates along the circumference of the sun gear 24 while rotating, the first deceleration is performed.

제1유성기어(30)와 제2유성기어(32)는 동축상에 설치되며, 제1유성기어(30)와 제2유성기어(32)의 잇수는 동일한 잇수를 갖는다.The first planetary gear 30 and the second planetary gear 32 are provided coaxially, and the teeth of the first planetary gear 30 and the second planetary gear 32 have the same number of teeth.

제1유성기어(30)와 제2유성기어(32)는 캐리어(40)에 의해 지지되며, 제2유성기어(32)의 외측을 감싸며 제2링기어(42)가 설치된다.The first planetary gear 30 and the second planetary gear 32 are supported by the carrier 40 and surround the outer side of the second planetary gear 32 and are provided with a second ring gear 42.

제1링기어(26)와 제2링기어(42)의 잇수 차이는, 제1유성기어(30)와 상기 제2유성기어(32)의 개수에 비례한다.The number of teeth of the first ring gear 26 and the second ring gear 42 is proportional to the number of the first planetary gear 30 and the second planetary gear 32.

예를 들어, 제1유성기어(30)와 상기 제2유성기어(32)의 개수가 3개인 경우, 제1링기어(26)와 제2링기어(42)의 잇수 차이는 3의 배수로 차이가 난다. For example, when the number of the first planetary gear 30 and the second planetary gear 32 is three, the number of teeth of the first ring gear 26 and the second ring gear 42 is different in multiples of three. Flies

일 실시예에 따른 제1유성기어(30)는 썬기어(24)의 주변을 따라 4개가 설치되며, 이러한 제1유성기어(30)와 동일한 축 상에 설치되는 제2유성기어(32)도 4개가 설치된다.Four first planetary gears 30 according to an embodiment are installed along the periphery of the sun gear 24, and the second planetary gear 32 installed on the same axis as the first planetary gear 30 is also provided. Four are installed.

제1유성기어(30)와 제2유성기어(32)의 개수가 4개이므로, 이에 치합되는 제1링기어(26)와 제2링기어(42)의 잇수는 4의 배수만큼 차이가 발생한다.Since the number of the first planetary gear 30 and the second planetary gear 32 is four, the number of teeth of the first ring gear 26 and the second ring gear 42 meshed thereto may be different by a multiple of four. do.

즉, 제1유성기어(30)와 제2유성기어(32)의 개수는 4개이며, 제1링기어(26)와 제2링기어(42)의 잇수 차이는 4의 배수로 이루어진다.That is, the number of the first planetary gear 30 and the second planetary gear 32 is four, and the number of teeth of the first ring gear 26 and the second ring gear 42 is a multiple of four.

따라서, 제1유성기어(30)와 제2유성기어(32)를 제1링기어(26)와 제2링기어(42)에 조립하는 경우, 제1유성기어(30)와 제2유성기어(32)는 제1링기어(26)와 제2링기어(42)에 등간격으로 설치된다.Therefore, when the first planetary gear 30 and the second planetary gear 32 are assembled to the first ring gear 26 and the second ring gear 42, the first planetary gear 30 and the second planetary gear are 32 is provided at equal intervals between the first ring gear 26 and the second ring gear 42.

또한, 제1유성기어(30)와 제2유성기어(32)가 설치되는 부분에서, 제1링기어(26)와 제2링기어(42)의 치형이 일치하므로, 제1유성기어(30)와 제2유성기어(32)의 설치가 보다 용이하게 이루어진다.Further, since the teeth of the first ring gear 26 and the second ring gear 42 coincide in the portion where the first planetary gear 30 and the second planetary gear 32 are installed, the first planetary gear 30 ) And the second planetary gear 32 are more easily installed.

제1유성기어(30)가 제1링기어(26)를 따라 회전되는 경우, 제1유성기어(30)와 같이 회전되는 제2유성기어(32)도 제2링기어(42)를 따라 회전되며, 제1링기어(26)와 제2링기어(42)의 잇수가 차이나므로, 제2유성기어(32)에 맞물리는 제2링기어(42)도 제1링기어(26)와 치형이 일치되는 방향으로 회전된다.When the first planetary gear 30 is rotated along the first ring gear 26, the second planetary gear 32, which is rotated along with the first planetary gear 30, also rotates along the second ring gear 42. Since the number of teeth of the first ring gear 26 and the second ring gear 42 is different, the second ring gear 42 meshing with the second planetary gear 32 also has a tooth shape with the first ring gear 26. It is rotated in the matching direction.

제2링기어(42)와 감속케이스(22)의 사이에는 니들베어링(44)이 설치되므로, 제2링기어(42)의 회전시 발생하는 마찰을 감소시킨다. Since the needle bearing 44 is installed between the second ring gear 42 and the deceleration case 22, friction generated when the second ring gear 42 is rotated is reduced.

회전이 이루어지는 제2링기어(42)는 출력축(46)과 연결되므로, 제2링기어(42)와 함께 출력축(46)도 회전된다.Since the second ring gear 42 that rotates is connected to the output shaft 46, the output shaft 46 also rotates together with the second ring gear 42.

출력축(46)은 휠부재(60)의 회전중심에 연결되며, 출력축(46)의 회전으로 휠부재(60)도 회전된다.The output shaft 46 is connected to the center of rotation of the wheel member 60, the wheel member 60 is also rotated by the rotation of the output shaft 46.

허브내륜(50)은, 휠부재(60)에 고정되며, 출력축(46)이 관통 설치되는 내측통공을 구비하는 기술사상 안에서 다양한 형상으로 형성될 수 있다.Hub inner ring 50 is fixed to the wheel member 60, the output shaft 46 may be formed in a variety of shapes within the technical concept having an inner through-hole that is installed through.

허브내륜(50)을 지지하는 허브외륜(54)은 허브외륜(54)을 감싸며 설치되며, 허브내륜(50)과 허브외륜(54)의 사이에는 마찰을 감소시키는 허브베어링(52)이 설치된다.The hub outer ring 54 supporting the hub inner ring 50 is installed to surround the hub outer ring 54, and a hub bearing 52 that reduces friction is provided between the hub inner ring 50 and the hub outer ring 54. .

감속부(20)의 출력축(46)에 연결되는 휠부재(60)는, 허브내륜(50)과 일체로 회전되며, 외측 둘레를 따라 타이어(70)가 설치되는 기술사상 안에서 다양한 변형 실시가 가능하다.The wheel member 60 connected to the output shaft 46 of the reduction unit 20 is rotated integrally with the hub inner ring 50 and can be variously modified within a technical concept in which the tire 70 is installed along the outer circumference. Do.

휠부재(60)는 타이어(70)를 지지하는 링 형상의 지지휠(62) 및 지지휠(62)의 중앙 개구된 부분을 폐쇄하는 내측벽(64)을 포함한다.The wheel member 60 includes a ring-shaped support wheel 62 for supporting the tire 70 and an inner wall 64 for closing the centrally opened portion of the support wheel 62.

감속부(20)의 구동축(17)과 휠부재(60)의 회전중심은 동축상에 위치하므로, 모터부(10)의 동력전달이 신속하고 용이하게 이루어진다.Since the rotation center of the drive shaft 17 and the wheel member 60 of the reduction unit 20 is coaxial, power transmission of the motor unit 10 is made quickly and easily.

휠부재(60)의 내측에는 제1드럼(80)이 설치되어 휠부재(60)와 같이 회전되며, 차체에 고정되는 모터부(10)에는 제2드럼(82)이 설치된다.The first drum 80 is installed inside the wheel member 60 to rotate together with the wheel member 60, and the second drum 82 is installed at the motor unit 10 fixed to the vehicle body.

이하에서는 첨부된 도면들을 참조하여 본 발명의 일 실시예에 따른 인휠 구동장치(1)의 작동상태를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the operating state of the in-wheel drive device 1 according to an embodiment of the present invention.

도 1에 도시된 바와 같이, 모터부(10)의 구동축(17)이 회전되면, 구동축(17)에 연결된 썬기어(24)가 회전된다.As shown in FIG. 1, when the drive shaft 17 of the motor unit 10 is rotated, the sun gear 24 connected to the drive shaft 17 is rotated.

썬기어(24)와 제1링기어(26)에 맞물려 있는 제1유성기어(30)가 자전하면서 공정하므로, 1차감속이 이루어진다.Since the first planetary gear 30 meshed with the sun gear 24 and the first ring gear 26 rotates and is processed, primary deceleration is achieved.

제1유성기어(30)와 축 연결된 제2링기어(42)도 제2유성기어(32)에 맞물리면서 회전되며, 제1링기어(26)와 제2링거어의 잇수가 상이하므로, 제2유성기어(32)에 치합되는 제2링기어(42)도 제1링기어(26)와 치형이 일치하는 방향으로 회전된다.The second ring gear 42 which is axially connected to the first planetary gear 30 is also rotated while being engaged with the second planetary gear 32, and because the number of teeth of the first ring gear 26 and the second ring gear is different, The second ring gear 42 meshed with the planetary gear 32 is also rotated in a direction coincident with the first ring gear 26.

제2링기어(42)의 회전으로 출력축(46)이 회전되면서 타이어(70)가 설치된 휠부재(60)를 회전시킨다.The output shaft 46 is rotated by the rotation of the second ring gear 42 to rotate the wheel member 60 on which the tire 70 is installed.

상술한 바와 같은 구성에 의하면, 일 실시예에 따른 인휠 구동장치(1)는, 제1유성기어(30)에서 1차 감속이 이루어지며, 제2유성기어(32)와 맞물리는 제2링기어(42)에서 2차 감속이 이루어지므로, 감속비를 향상시켜 휠부재(60)의 사이즈를 감소시킬 수 있으며, 구동토크의 증가에 의해 모터의 구동력을 향상시킬 수 있다.According to the configuration as described above, the in-wheel drive device 1 according to an embodiment, the first deceleration is made in the first planetary gear 30, the second ring gear meshing with the second planetary gear 32 Since the second deceleration is performed at 42, the reduction ratio may be improved to reduce the size of the wheel member 60, and the driving force of the motor may be improved by increasing the driving torque.

본 발명은 도면에 도시된 실시예를 참고로 하여 설명되었으나, 이는 예시적인 것에 불과하며, 당해 기술이 속하는 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

또한, 전기자동차에 사용되는 인휠 구동장치를 예로 들어 설명하였으나, 이는 예시적인 것에 불과하며, 전기자동차가 아닌 다른 운송장치나 탑승장치에도 본 발명에 의한 인휠 구동장치가 사용될 수 있다.In addition, although the in-wheel driving apparatus used in the electric vehicle has been described as an example, this is merely exemplary, and the in-wheel driving apparatus according to the present invention may also be used in other transportation apparatuses or vehicles other than the electric vehicle.

따라서, 본 발명의 진정한 기술적 보호범위는 특허청구범위에 의해서 정하여져야 할 것이다.
Accordingly, the true scope of protection of the present invention should be defined by the claims.

1: 인휠 구동장치 10: 모터부
11: 모터하우징 13: 커버부재
15: 고정자 16: 회전자
17: 구동축 20: 감속부
22: 감속케이스 24: 썬기어
26: 제1링기어 28: 기어베어링
30: 제1유성기어 32: 제2유성기어
40: 캐리어 42: 제2링기어
44: 니들베어링 46: 출력축
50: 허브내륜 52: 허브베어링
54: 허브외륜 60: 휠부재
62: 지지휠 64: 내측벽
70: 타이어1: In-wheel drive device 10: Motor part
11: motor housing 13: cover member
15: stator 16: rotor
17: drive shaft 20: reduction gear
22: reduction case 24: sun gear
26: first ring gear 28: gear bearing
30: first planetary gear 32: second planetary gear
40: carrier 42: second ring gear
44: needle bearing 46: output shaft
50: hub inner ring 52: hub bearing
54: hub outer ring 60: wheel member
62: support wheel 64: inner wall
70: tires

Claims (6)

동력이 발생되는 모터부;
상기 모터부의 구동축과 연결되며, 2단의 링기어에 유성기어가 맞물려서 감속이 이루어지는 감속부;
상기 감속부의 출력축에 연결되며, 외측 둘레를 따라 타이어가 설치된 휠부재;
상기 휠부재에 고정되며, 상기 출력축이 관통 설치되는 허브내륜; 및
상기 허브내륜을 지지하는 허브외륜을 포함하는 것을 특징으로 하는 인휠 구동장치.
A motor unit generating power;
A reduction unit connected to the drive shaft of the motor unit and configured to decelerate by engaging a planetary gear with two ring gears;
A wheel member connected to the output shaft of the reduction unit and having a tire installed along an outer circumference thereof;
A hub inner ring which is fixed to the wheel member and in which the output shaft is installed; And
In-wheel drive device characterized in that it comprises a hub outer ring for supporting the hub inner ring.
제 1 항에 있어서, 상기 감속부는,
상기 구동축에 연결되는 썬기어;
상기 썬기어에 치합되는 제1유성기어;
링 형상으로 형성되어 상기 제1유성기어에 치합되며, 회전이 구속되는 제1링기어;
상기 제1유성기어와 동축상에 설치되며, 상기 제1유성기어와 동일한 잇수를 가지는 제2유성기어; 및
링 형상으로 형성되어 상기 제2유성기어에 치합되며, 회전이 허용되는 제2링기어를 포함하는 것을 특징으로 하는 인휠 구동장치.
The method of claim 1, wherein the deceleration unit,
A sun gear connected to the drive shaft;
A first planetary gear meshed with the sun gear;
A first ring gear formed in a ring shape and meshed with the first planetary gear, the rotation of which is restricted;
A second planetary gear disposed coaxially with the first planetary gear and having the same number of teeth as the first planetary gear; And
In-wheel drive device characterized in that it comprises a second ring gear is formed in a ring shape is meshed with the second planetary gear, the rotation is allowed.
제 2 항에 있어서,
상기 제1링기어와 상기 제2링기어의 잇수 차이는, 상기 제1유성기어와 상기 제2유성기어의 개수에 비례하는 것을 특징으로 하는 인휠 구동장치.
The method of claim 2,
The number of teeth between the first ring gear and the second ring gear is in proportion to the number of the first planetary gear and the second planetary gear.
제 3 항에 있어서,
상기 제1유성기어와 상기 제2유성기어의 개수는 4개이며, 상기 제1링기어와 상기 제2링기어의 잇수 차이는 4의 배수인 것을 특징으로 하는 인휠 구동장치.
The method of claim 3, wherein
The number of the first planetary gear and the second planetary gear is four, the difference between the number of teeth of the first ring gear and the second ring gear is a multiple of four in-wheel drive device.
제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 구동축과 상기 휠부재의 회전중심은 동축상에 위치하는 것을 특징으로 하는 인휠 구동장치.
The method according to any one of claims 1 to 4,
The center of rotation of the drive shaft and the wheel member is located in the coaxial drive apparatus.
제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 허브내륜과 상기 허브외륜의 사이에 설치되어 마찰을 감소시키는 허브베어링을 더 포함하는 것을 특징으로 하는 인휠 구동장치.The method according to any one of claims 1 to 4,
In-wheel drive device further comprises a hub bearing is provided between the hub inner ring and the hub outer ring to reduce friction.
KR1020110039151A 2011-04-26 2011-04-26 In-wheel working device KR20120121271A (en)

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