KR102634266B1 - Transaxle gear system for Electric Vehicle - Google Patents
Transaxle gear system for Electric Vehicle Download PDFInfo
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- KR102634266B1 KR102634266B1 KR1020220101907A KR20220101907A KR102634266B1 KR 102634266 B1 KR102634266 B1 KR 102634266B1 KR 1020220101907 A KR1020220101907 A KR 1020220101907A KR 20220101907 A KR20220101907 A KR 20220101907A KR 102634266 B1 KR102634266 B1 KR 102634266B1
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- gear
- differential
- reducers
- planetary
- planetary gear
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- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 81
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000000969 carrier Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 238000007796 conventional method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
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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
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
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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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/46—Systems consisting of a plurality of gear trains each with orbital gears, i.e. systems having three or more central gears
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/70—Gearings
- B60Y2400/73—Planetary gearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/80—Differentials
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- 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
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Retarders (AREA)
Abstract
서로 분리된 2개의 차축과 분리된 차축에 각각 연결된 제1, 제2유성기어감속기와, 상기 제1, 제2유성기어감속기의 상이한 일측의 일부가 연결된 차동장치와, 상기 제1, 제2유성기어감속기의 태양기어가 연결된 3rd 기어와, 상기 3rd 기어와 기어 결합하는 2nd 기어와 전기모터의 입력 기어와 결합하는 1st 기어가 다단기어로 구성되어있는 1st-2nd 기어와, 상기 1st 기어와 기어 결합하는 입력 기어를 포함하는 전기모터로 구비되며, 상기와 같은 구성에서 서로 분리된 2개의 차축에 각각 연결된 제1, 제2유성기어감속기에 구동륜에서 차축을 타고 전해오는 로드가 종례 차동장치에 연결된 단일 기어로 양측의 로드가 직접 전달되는 것이 아닌, 분리된 제1, 제2유성기어감속기에 따로 분리되어 전달됨에 따라 감속기어를 구성함에 있어 감속기어들을 작은 모듈과 폭으로 구성할 수 있으며, 차동장치를 베벨기어 및 베벨기어 케이스로 구성하는 것이 아닌, 아이들 기어를 포함한 차동기어와 차동축으로 차동장치를 구성하여 제1, 제2유성기어감속기에 구성된 외치기어를 통해 좌, 우 분리된 차축의 차동을 구성함으로, 결과적으로 종례의 종단감속기어와 같이 커다란 기어를 구성할 필요가 없으며, 또한 상기 차동축에 감속기어를 구성하는 1st-2nd 기어를 회전가능하게 배치함으로써 각각의 장치가 따로 설치공간을 요구하지 않아 상기의 이점과 더해져 상기 장치를 수용하는 트랜스액슬 하우징의 크기 및 부피를 줄여 구조의 간략화가 가능한 것을 특징으로하는 전기자동차용 트랜스액슬의 기어 구조. Two separate axles and first and second planetary gear reducers respectively connected to the separated axles, a differential device connected to a part of a different side of the first and second planetary gear reducers, and the first and second planetary gear reducers A 1st-2nd gear consisting of a multi-stage gear consisting of a 3rd gear connected to the sun gear of the gear reducer, a 2nd gear combined with the 3rd gear, and a 1st gear connected to the input gear of the electric motor, and the gear combination with the 1st gear. It is equipped with an electric motor including an input gear, and in the configuration described above, the load transmitted from the drive wheel through the axle to the first and second planetary gear reducers respectively connected to two axles separated from each other is a single gear connected to a conventional differential device. As the load on both sides of the furnace is not directly transmitted, but is transmitted separately to the first and second planetary gear reducers, the reduction gears can be configured with small modules and widths, and a differential device is used. Instead of being composed of a bevel gear and a bevel gear case, the differential device is composed of a differential gear including an idle gear and a differential shaft, and the differential of the left and right separated axles is achieved through external gears composed of the first and second planetary gear reducers. As a result, there is no need to construct a large gear like a conventional final reduction gear, and by rotatably arranging the 1st-2nd gears that make up the reduction gear on the differential shaft, each device requires separate installation space. A gear structure for a transaxle for an electric vehicle, which, in addition to the above advantages, allows for simplification of the structure by reducing the size and volume of the transaxle housing that accommodates the device.
Description
본 발명은 전기자동차용 트랜스액슬의 기어 구조에 관한 것으로, 보다 상세하게는 일측에 입력 기어가 구비된 전기모터에서 전달된 회전을 1st-2nd 기어, 3rd 기어와 분리된 2개의 차축에 각각 연결된 제1, 제2유성기어감속기를 거쳐 감속된 회전을 출력하는 감속기에 있어서, 분리된 2개의 차축을 상기 제1, 제2유성기어감속기에 형성된 외치기어에 각각 제2차동기어, 아이들 기어가 기어 결합하고, 상기 아이들 기어에 제1차동기어가 기어 결합하여 차동장치를 구성하는 전기자동차용 트랜스액슬의 기어 구조이다. The present invention relates to a gear structure of a transaxle for an electric vehicle. More specifically, the present invention relates to a gear structure of a transaxle for an electric vehicle. More specifically, the rotation transmitted from an electric motor equipped with an input gear on one side is transmitted to a second axle each connected to two axles separated from the 1st-2nd gear and the 3rd gear. In the reducer that outputs the reduced rotation through the first and second planetary gear reducers, the two separated axles are geared to the external gears formed in the first and second planetary gear reducers, and a second differential gear and an idle gear are geared, respectively. This is a gear structure of a transaxle for an electric vehicle in which a first differential gear is coupled to the idle gear to form a differential device.
일반적으로 전기자동차의 동력 전달은 배터리 전원에 의하여 구동 모터가 구동되면, 그 구동력은 감속기로 전달되고, 감속기에서 감속된 구동력은 차동장치 및 출력축을 통하여 양측 구동륜으로 전달된다. In general, when the drive motor is driven by battery power, the power transmission of an electric vehicle is transmitted to a reducer, and the driving power reduced from the reducer is transmitted to both drive wheels through a differential device and output shaft.
특허문헌 1에서 볼 수 있는 형태가 보편적으로 많이 사용되고 있는 트랜스액슬의 구조이다. 일측에 모터축이 나와 감속기를 거친 후 베벨기어로 구성된 차동장치를 통해 출력축이 양측 구동륜으로 전달되는 형태이다, 상기와 같은 구성에 있어서 양측 차축과 연결된 차동장치를 단일 기어로 연결함에 따라 양측 구동륜에서 전달되는 로드를 견디기 위해 종단 감속기어 뿐만 아니라 전체적인 감속기어가 크고 두껍게 형성된 것을 확인 할 수 있다. The form seen in Patent Document 1 is the structure of a widely used transaxle. After the motor shaft comes out on one side and goes through a reducer, the output shaft is transmitted to both drive wheels through a differential device composed of bevel gears. In the above configuration, the differential devices connected to both axles are connected to a single gear, so that the output shaft is transmitted to both drive wheels. It can be seen that not only the terminal reduction gear but also the overall reduction gear is formed large and thick to withstand the transmitted load.
이와 같은 감속기어와, 차동기어가 배치됨에 따라 트랜스액슬 하우징은 상기 장치를 수용할 수 있도록 커져야 하며,As such reduction gears and differential gears are arranged, the transaxle housing must be large to accommodate the devices.
상기와 설명과 같이 양측 구동륜의 로드가 베벨기어로 구성된 차동장치에 직접적으로 전달 됨에 따라 차동장치에 직접 연결되어 감속을 수행하는 감속기어는 그 하중을 견딜 수 있도록 기어의 모듈이 크고 충분한 기어 치폭을 가지도록 구성되어야 하며, 그에 따라 상기 차동장치, 감속기어를 수용하는 트랜스액슬 장치도 크고 두꺼운 형상을 가지게 된다. As described above, the load from both drive wheels is directly transmitted to the differential device composed of bevel gears, so the reduction gear that is directly connected to the differential device and performs deceleration has a large gear module and sufficient gear tooth width to withstand the load. It must be configured so that the transaxle device that accommodates the differential device and reduction gear also has a large and thick shape.
이러한 점을 종례의 방법과 다른 감속기어 및 차동기어의 구성으로 해소할 수 있는 트랜스액슬의 기어 구조를 제공하는 것을 목적으로 한다.The purpose is to provide a gear structure for a transaxle that can solve this problem by using a reduction gear and differential gear configuration that is different from the conventional method.
서로 분리된 2개의 차축과 분리된 차축에 각각 연결된 제1, 제2유성기어감속기와, 상기 제1, 제2유성기어감속기의 상이한 일측의 일부가 연결된 차동장치와, 상기 제1, 제2유성기어감속기의 태양기어가 연결된 3rd 기어와, 상기 3rd 기어와 기어 결합하는 2nd 기어와 전기모터의 입력 기어와 결합하는 1st 기어가 다단기어로 구성되어있는 1st-2nd 기어와, 상기 1st 기어와 기어 결합하는 입력 기어를 포함하는 전기모터로 구비되는 전기자동차용 트랜스액슬의 기어 구조.Two separate axles and first and second planetary gear reducers respectively connected to the separated axles, a differential device connected to a part of a different side of the first and second planetary gear reducers, and the first and second planetary gear reducers A 1st-2nd gear consisting of a multi-stage gear consisting of a 3rd gear connected to the sun gear of the gear reducer, a 2nd gear combined with the 3rd gear, and a 1st gear connected to the input gear of the electric motor, and the gear combination with the 1st gear. Gear structure of a transaxle for an electric vehicle equipped with an electric motor including an input gear.
본 발명에 따른 전기자동차용 트랜스액슬의 기어 구조는, 서로 분리된 2개의 차축에 각각 연결된 제1, 제2유성기어감속기에 구동륜에서 차축을 타고 전해오는 로드가 종례 차동장치에 연결된 단일 기어로 양측의 로드가 직접 전달되는 것이 아닌, 분리된 제1, 제2유성기어감속기에 따로 분리되어 전달됨에 따라 감속기어를 구성함에 있어 감속기어들을 작은 모듈과 폭으로 구성할 수 있으며, 차동장치를 베벨기어 및 베벨기어 케이스로 구성하는 것이 아닌, 아이들 기어를 포함한 차동기어와 차동축으로 차동장치를 구성하여 제1, 제2유성기어감속기에 구성된 외치기어를 통해 좌, 우 분리된 차축의 차동을 구성함으로, 결과적으로 종례의 종단감속기어와 같이 커다란 기어를 구성할 필요가 없게 된다. 또한 상기 차동축에 감속기어를 구성하는 1st-2nd 기어를 회전가능하게 배치함으로써 각각의 장치가 따로 설치공간을 요구하지 않아 상기의 이점과 더해져 상기 장치를 수용하는 트랜스액슬 하우징의 크기 및 부피를 줄여 구조의 간략화가 가능하다. The gear structure of the transaxle for an electric vehicle according to the present invention is that the load transmitted from the drive wheel through the axle to the first and second planetary gear reducers respectively connected to two separate axles is a single gear connected to a conventional differential device on both sides. As the load is not transmitted directly, but is transmitted separately to the first and second planetary gear reducers, the reduction gears can be configured with small modules and widths, and the differential device can be used as a bevel gear and Rather than being composed of a bevel gear case, the differential device is composed of a differential gear including an idle gear and a differential shaft, and the differential of the left and right axles is configured through an external gear composed of the first and second planetary gear reducers, As a result, there is no need to construct a large gear like the conventional terminal reduction gear. In addition, by rotatably arranging the 1st-2nd gears that make up the reduction gear on the differential shaft, each device does not require separate installation space, which adds to the above advantages and reduces the size and volume of the transaxle housing that accommodates the device. Simplification of the structure is possible.
또한 그에 더하여 제1, 제2유성기어감속기 및 제2차동기어, 아이들 기어를 동일 기어를 대칭으로 배치하여 구성할 수 있음으로, 실제 재고관리 및 조립관리가 수월한 이점 등이 있다. In addition, since the first and second planetary gear reducers, the second differential gear, and the idle gear can be configured by arranging the same gears symmetrically, there is an advantage in that actual inventory management and assembly management are easy.
도 1. 본 발명에서 제공하는 전기자동차용 트랜스액슬의 기어 구조의 바람직한 일 실시예를 보인 단면도이다.
도 2. 본 발명에서 제공하는 전기자동차용 트랜스액슬의 기어 구조의 기어연결 및 동력전달을 도시한 개략도이다.
도 3. 본 발명에서 제공하는 전기자동차용 트랜스액슬의 기어 구조 중 좌회전 사항에서의 차동장치의 동력 전달을 도시한 개략도이다.
도 4. 본 발명에서 제공하는 전기자동차용 트랜스액슬의 기어 구조 중 우회전 사항에서의 차동장치의 동력 전달을 도시한 개략도이다.
도 5. 본 발명에서 제공하는 전기자동차용 트랜스액슬의 기어 구조의 저 감속비 형태를 도시한 개략도이다.
도 6. 본 발명에서 제공하는 전기자동차용 트랜스액슬의 기어 구조의 타 실시예의 기어연결 및 동력전달을 도시한 개략도이다.
도 7. 본 발명에서 제공하는 전기자동차용 트랜스액슬의 기어 구조의 타 실시예의 저 감속비 형태를 도시한 개략도이다.Figure 1. A cross-sectional view showing a preferred embodiment of the gear structure of a transaxle for an electric vehicle provided by the present invention.
Figure 2. A schematic diagram showing the gear connection and power transmission of the gear structure of the transaxle for an electric vehicle provided by the present invention.
Figure 3. A schematic diagram showing the power transmission of the differential device in left turn in the gear structure of the transaxle for an electric vehicle provided by the present invention.
Figure 4. A schematic diagram showing the power transmission of the differential device in a right turn in the gear structure of the transaxle for an electric vehicle provided by the present invention.
Figure 5. A schematic diagram showing a low reduction ratio form of the gear structure of the transaxle for an electric vehicle provided by the present invention.
Figure 6. A schematic diagram showing gear connection and power transmission of another embodiment of the gear structure of the transaxle for an electric vehicle provided by the present invention.
Figure 7. A schematic diagram showing a low reduction ratio form of another embodiment of the gear structure of the transaxle for an electric vehicle provided by the present invention.
이하 본 발명의 목적이 구체적으로 실현될 수 있는 전기자동차용 트랜스액슬의 기어 구조에 대한 예시적인 일실시예를 첨부된 도면을 참조하여 설명한다. Hereinafter, an exemplary embodiment of a gear structure of a transaxle for an electric vehicle in which the object of the present invention can be concretely realized will be described with reference to the attached drawings.
도 1은 본 발명에서 제시하는 트랜스액슬의 기어 구조를 올바르게 적용한 일 실시예를 도시한 것으로 이를 간략한 기어 구조의 개략도로 도시한 것이 도 2이다. Figure 1 shows an example in which the gear structure of the transaxle proposed in the present invention is correctly applied, and Figure 2 is a schematic diagram of the simplified gear structure.
상기 도 1, 도 2에 따라 본 발명은, 서로 분리된 2개의 차축(2)과 상기 분리된 차축(2)에 각각 연결된 제1, 제2유성기어감속기(20, 30)와, 상기 제1 ,제2유성기어감속기(20. 30)의 상이한 일측의 일부가 연결된 차동장치(40)와, 상기 제1, 제2유성기어감속기(20. 30)의 태양기어(21, 31)가 연결되어 태양기어(21, 31)와 동일한 회전을 하는 3rd 기어(12)와, 상기 3rd 기어(12)와 기어 결합하는 2nd 기어(11b)와 전기모터의 입력 기어(10)와 결합하는 1st 기어(11a)가 다단기어로 구성되어 있는 1st-2nd 기어(11)와, 상기 1st 기어(11a)와 기어 결합하는 입력 기어(10)를 포함하는 전기모터(1)로 구성되어있다. According to FIGS. 1 and 2, the present invention includes two separated axles (2), first and second planetary gear reducers (20, 30) respectively connected to the separated axles (2), and the first , A differential device (40) to which a part of the different side of the second planetary gear reducer (20.30) is connected, and the sun gears (21, 31) of the first and second planetary gear reducers (20.30) are connected. A 3rd gear (12) that rotates the same as the sun gear (21, 31), a 2nd gear (11b) that is coupled to the 3rd gear (12), and a 1st gear (11a) that is coupled to the input gear (10) of the electric motor. ) is composed of a 1st-2nd gear (11) composed of multi-stage gears, and an electric motor (1) including an input gear (10) geared to the 1st gear (11a).
상기와 같은 구성에서 차축(2)은 일측이 좌, 우측 구동륜(3)과 직접 혹은 연결부재를 거쳐 각각 연결되어 최종 출력을 구동륜(3)으로 전달하고, 차축(2)의 타측은 각각 제1, 제2유성기어감속기(20, 30)의 캐리어(24, 34)와 연결되어 동력을 전달 받을 수 있다.In the above configuration, one side of the axle 2 is connected to the left and right driving wheels 3 directly or through a connecting member to transmit the final output to the driving wheel 3, and the other side of the axle 2 is connected to the first and second drive wheels 3, respectively. , It can be connected to the carriers 24 and 34 of the second planetary gear reducers 20 and 30 to receive power.
제1유성기어감속기(20)는 제1유성기어감속기 태양기어(21), 제1유성기어감속기 유성기어(22), 제1유성기어감속기 링 기어(23), 제1유성기어감속기 캐리어(24)를 포함하여 구비되며, 태양기어(21)는 축의 일측으로 축의 타측에 제2유성기어감속기 태양기어(31)가 형성되어 있으며, 축의 중간에는 3rd 기어(12)가 축과 동일한 회전을 하도록 연결되어있다. 또한 제1유성기어감속기 캐리어(24)는 상기 유성기어(22)를 수용할 수 있도록 구성되어 있으며, 캐리어(24)의 일측은 상기 차축(2)에 동력을 전달 할 수 있도록 연결되어있다. 제1유성기어감속기 링 기어(23)는 일측에 베어링이 설치되어 하우징 또는 차축(2)을 통해 회전가능하게 지지할 수 있도록 구성되어있고, 링 기어(23)의 내측에는 상기 유성기어(22)와 기어결합 할 수 있는 내치기어가 형성되어있으며, 링 기어(23)의 외측에는 차동장치(40)와 기어결합 할 수 있는 외치기어(44)가 형성되어있다.The first planetary gear reducer (20) includes a first planetary gear reducer sun gear (21), a first planetary gear reducer planetary gear (22), a first planetary gear reducer ring gear (23), and a first planetary gear reducer carrier (24). ), the sun gear 21 is formed on one side of the shaft, and the second planetary gear reducer sun gear 31 is formed on the other side of the shaft, and the 3rd gear 12 is connected to the middle of the shaft so that it rotates the same as the shaft. It is done. In addition, the first planetary gear reducer carrier 24 is configured to accommodate the planetary gear 22, and one side of the carrier 24 is connected to transmit power to the axle 2. The first planetary gear reducer ring gear 23 is configured to have a bearing installed on one side so that it can be rotatably supported through a housing or axle 2, and the planetary gear 22 is located inside the ring gear 23. An internal gear capable of gear combination is formed, and an external gear 44 capable of gear combination with the differential device 40 is formed on the outside of the ring gear 23.
제2유성기어감속기(30)는 제2유성기어감속기 태양기어(31), 제2유성기어감속기 유성기어(32), 제2유성기어감속기 링 기어(33), 제2유성기어감속기 캐리어(34)를 포함하여 구비되며, 태양기어(31)는 축의 일측으로 축의 타측에 제1유성기어감속기 태양기어(21)가 형성되어 있으며, 축의 중간에는 3rd 기어(12)가 축과 동일한 회전을 하도록 연결되어있다. 또한 제2유성기어감속기 캐리어(34)는 상기 유성기어(32)를 수용할 수 있도록 구성되어 있으며, 캐리어(34)의 일측은 상기 차축(2)에 동력을 전달 할 수 있도록 연결되어있다. 제2유성기어감속기 링 기어(33)는 일측에 베어링이 설치되어 하우징 또는 차축(2)을 통해 회전가능하게 지지할 수 있도록 구성되어있고, 링 기어(33)의 내측에는 상기 유성기어(32)와 기어결합 할 수 있는 내치기어가 형성되어있으며, 링 기어(33)의 외측에는 차동장치(40)와 기어결합 할 수 있는 외치기어(44)가 형성되어있다.The second planetary gear reducer (30) includes a second planetary gear reducer sun gear (31), a second planetary gear reducer planetary gear (32), a second planetary gear reducer ring gear (33), and a second planetary gear reducer carrier (34). ), the sun gear 31 is formed on one side of the shaft, and the first planetary gear reducer sun gear 21 is formed on the other side of the shaft, and the 3rd gear 12 is connected to the middle of the shaft to rotate the same as the shaft. It is done. In addition, the second planetary gear reducer carrier 34 is configured to accommodate the planetary gear 32, and one side of the carrier 34 is connected to transmit power to the axle 2. The second planetary gear reducer ring gear 33 is configured to have a bearing installed on one side so that it can be rotatably supported through the housing or axle 2, and the planetary gear 32 is located inside the ring gear 33. An internal gear capable of gear combination is formed, and an external gear 44 capable of gear combination with the differential device 40 is formed on the outside of the ring gear 33.
입력 기어(10)는 배터리와 같은 외부 전력을 전달 받아 동력을 전달할 수 있는 전기모터(1)에 연결되어 일측에 구비되어있다.The input gear 10 is connected to an electric motor 1 that can transmit power by receiving external power such as a battery and is provided on one side.
1st-2nd 기어(11)는 입력 기어(10)와 기어 결합하는 1st 기어(11a)와, 3rd 기어(12)와 기어 결합하는 2nd 기어(11b)가 하나의 기어에 형성되어있는 다단 기어로 구성되어있다. The 1st-2nd gear (11) consists of a multi-stage gear consisting of a 1st gear (11a) that engages with the input gear (10) and a 2nd gear (11b) that combines with the 3rd gear (12) in one gear. It is done.
3rd 기어(12)는 양측에 상기 제1, 제2유성기어감속기의 태양기어(21, 31)가 형성되어있는 축의 중심에 축과 동일한 회전으로 동력을 전달할 수 있도록 설치되어있다.The 3rd gear 12 is installed at the center of the axis where the sun gears 21 and 31 of the first and second planetary gear reducers are formed on both sides to transmit power with the same rotation as the axis.
차동장치(40)는 하우징에 베어링으로 회전가능하게 지지되는 차동축(45)과, 상기 차동축(45)의 일측에 설치되는 제1차동기어(41)와, 차동축(45)의 타측에 설치되는 제2차동기어(43)와, 하우징에 회전가능하게 설치되며 상기 제1차동기어(41)와 기어 결합하는 차동 아이들 기어(42)와 제1, 제2유성기어감속기의 링 기어(23, 33)의 외측에 형성되어 있으며 상기 차동 아이들 기어(42), 제2차동기어(43)와 기어 결합하는 외치기어(44)로 구비되어있다.The differential device 40 includes a differential shaft 45 rotatably supported by a bearing in a housing, a first differential gear 41 installed on one side of the differential shaft 45, and a first differential gear 41 installed on the other side of the differential shaft 45. A second differential gear 43 is installed, a differential idle gear 42 rotatably installed in the housing and gear-coupled with the first differential gear 41, and a ring gear 23 of the first and second planetary gear reducers. , 33) and is provided with an external gear 44 that engages with the differential idle gear 42 and the second differential gear 43.
상기와 같은 구성에서 차동장치(40)의 제1차동기어(41)는 제2차동기어(43)와 동일한 차동축(45)에 설치되어있으되, 제1, 제2유성기어감속기의 링 기어(23, 33)의 외측에 형성된 외치기어(44)와 기어결합하는 제2차동기어(43)와 달리 제1차동기어(41)는 기어결합하지 않음과 동시에 상기 외치기어(44)와 간섭이 발생하지 않도록 구성되어 있고, 그와 동시에 상기 차동축(45)에 상기 1st-2nd 기어(11)가 차동축(45)의 회전과 별개로 회전 가능하게 차동축(45)에 지지되어 설치된다.In the above configuration, the first differential gear 41 of the differential device 40 is installed on the same differential shaft 45 as the second differential gear 43, and the ring gear ( Unlike the second differential gear 43 that engages with the external gear 44 formed on the outside of 23, 33, the first differential gear 41 does not engage with the external gear 44 and causes interference with the external gear 44. At the same time, the 1st-2nd gear 11 is supported and installed on the differential shaft 45 so that it can rotate independently of the rotation of the differential shaft 45.
상기 실시예에서의 동력 전달은 도 2의 개략도에 도시된 것과 같이 전기모터(1)에서 발생한 동력이 입력기어(10)를 거쳐 1st-2nd 기어(11)에 감속되어 전달되고, 다단으로 구성된 1st-2nd 기어(11)와 기어 결합된 3rd 기어(12)를 거치면서 다시 한 번 감속되어 3rd 기어(12)와 연결된 태양기어(21, 31)에 전달되어 제1, 제2유성기어감속기(20, 30)로 전달되어 최종감속이 발생하고 차축(2)을 통해 구동륜(3)에 전달된다. In the above embodiment, as shown in the schematic diagram of FIG. 2, the power generated from the electric motor 1 is reduced and transmitted to the 1st-2nd gear 11 through the input gear 10, and the 1st gear consists of multiple stages. -The speed is reduced once again through the 3rd gear (12) coupled with the 2nd gear (11) and transmitted to the sun gears (21, 31) connected to the 3rd gear (12) to the first and second planetary gear reducers (20). , 30), where final deceleration occurs, and is transmitted to the drive wheel (3) through the axle (2).
이때 양쪽 차축(2)의 차동은 상기 차동장치(40)를 통해 수행되고, 양측 링 기어(23, 33) 외측에 형성된 외치기어(44)와 기어 결합된 차동 아이들 기어(42), 제2차동 기어(43)와 상기 차동 아이들 기어(42)와 기어 결합하여 기어의 회전 방향이 반대 방향으로 전환된 제1차동 기어(41)가 상기 제2차동 기어(43)와 동일한 차동축(45)에 설치됨으로 제1, 제2유성기어감속기(20, 30)의 차동을 차동장치(40)가 조절가능하게 된다.At this time, the differential of both axles (2) is performed through the differential device (40), the differential idle gear (42) geared to the external gear (44) formed on the outside of both ring gears (23, 33), and the second differential. The first differential gear 41, in which the rotation direction of the gear is switched in the opposite direction by combining the gear 43 with the differential idle gear 42, is connected to the same differential shaft 45 as the second differential gear 43. By being installed, the differential device 40 can control the differential between the first and second planetary gear reducers 20 and 30.
상기 자동창지(40)가 차동을 조절하는 일반적인 사항으로는 전기자동차용 트랜스액슬이 부착된 차체가 좌회전 또는 우회전으로 회전할 때가 가장 보편적이며 도 3은 좌회전 동작을 수행할 때의 차동장치(40)의 동력 흐름을 보여준다. 도 3의 차동륜(3)에 표시된 것과 같이 좌측 차동륜보다 우측 차동륜(3)에 더 많은 회전이 걸릴 경우 트랜스액슬은 좌회전을 하게 되고 이때 우측보다 많은 회전이 걸리는 우측 차동륜(3)과 같이 우측 차축(2)에 연결된 제2유성기어감속기(30)는 좌측 보다 더 많은 회전이 요구되는바 동일한 3rd 기어(12)에 연결된 태양기어(21, 31)에 연결되어있음으로 부족한 회전을 보상받기위해 외치기어(44)를 통해 제2차동기어(43)를 회전 시킨다. 제2차동기어(43)가 회전함에 따라 동일한 차동축(45)에 연결된 제1차동기어(41)가 회전하고 제1차동기어(41)에 기어결합하고 있는 차동 아이들(42)를 상기 제2차동기어(43)와 반대의 회전방향으로 회전시켜 최종적으로 외치기어(44)를 통해 연결된 제1유성기어감속기(20)의 링 기어(23)를 상기 제2유성기어감속기(30)의 링 기어(33)의 회전 방향과 반대 방향으로 회전 키셔 차동 동작을 수행한다. 상기와 반대로 도 4는 우회전 동작을 수행할 때의 차동장치(40)의 동력 흐름을 보여준다. 도 4의 차동륜(3)에 표시된 것과 같이 우측 차동륜보다 좌측 차동륜(3)에 더 많은 회전이 걸릴 경우 트랜스액슬은 우회전을 하게 되고 이때 우측보다 많은 회전이 걸리는 좌측 차동륜(3)과 같이 좌측 차축(2)에 연결된 제1유성기어감속기(20)는 우측 보다 더 많은 회전이 요구되는바 동일한 3rd 기어(12)에 연결된 태양기어(21, 31)에 연결되어있음으로 부족한 회전을 보상받기위해 외치기어(44)를 통해 차동 아이들 기어(42)를 회전 시킨다. 차동 아이들 기어(42)가 회전함에 따라 차동 아이들 기어(42)와 기어 결합하고 있는 제1차동기어(41)는 차동 아이들 기어(42)와 반대 방향으로 회전하게 되고 그에 따라 제1차동기어(41)와 동일한 차동축(45)에 연결된 제2차동기어(43)는 상기 차동 아이들 기어(42)의 회전 방향과 반대 방향으로 회전하여 최종적으로 외치기어(44)를 통해 연결된 제2유성기어감속기(30)의 링 기어(33)를 상기 제1유성기어감속기(20)의 링 기어(23)의 회전 방향과 반대 방향으로 회전 키셔 차동 동작을 수행한다.The most common case in which the automatic window 40 adjusts the differential is when the car body to which the transaxle for an electric vehicle is attached turns left or right, and Figure 3 shows the differential device 40 when performing a left turn operation. shows the power flow of As shown in the differential wheel (3) in FIG. 3, when more rotation is applied to the right differential wheel (3) than to the left differential wheel, the transaxle turns left, and at this time, the right differential wheel (3), which rotates more than the right differential wheel, Likewise, the second planetary gear reducer (30) connected to the right axle (2) requires more rotation than the left, and is connected to the sun gears (21, 31) connected to the same 3rd gear (12) to compensate for the insufficient rotation. In order to receive it, the second differential gear (43) is rotated through the external gear (44). As the second differential gear 43 rotates, the first differential gear 41 connected to the same differential shaft 45 rotates, and the differential idle 42 engaged with the first differential gear 41 rotates. The ring gear 23 of the first planetary gear reducer 20 is rotated in the opposite rotation direction to the differential gear 43 and finally connected through the external gear 44 to the ring gear 23 of the second planetary gear reducer 30. (33) Performs a differential operation of the kisser rotating in the direction opposite to the rotation direction. In contrast to the above, FIG. 4 shows the power flow of the differential device 40 when performing a right turn operation. As shown in the differential wheel (3) in FIG. 4, when the left differential wheel (3) rotates more than the right differential wheel, the transaxle turns right, and at this time, the left differential wheel (3) which rotates more than the right differential wheel Likewise, the first planetary gear reducer (20) connected to the left axle (2) requires more rotation than the right one, and is connected to the sun gears (21, 31) connected to the same 3rd gear (12) to compensate for the insufficient rotation. To receive the differential idle gear (42), rotate it through the external gear (44). As the differential idle gear 42 rotates, the first differential gear 41 coupled with the differential idle gear 42 rotates in the opposite direction to the differential idle gear 42, and accordingly, the first differential gear 41 ), the second differential gear 43 connected to the same differential shaft 45 rotates in the opposite direction to the rotation direction of the differential idle gear 42, and finally the second planetary gear reducer connected through the external gear 44 ( A differential operation is performed by rotating the ring gear 33 of the first planetary gear reducer 20 in a direction opposite to the rotation direction of the ring gear 23 of the first planetary gear reducer 20.
도 5의 개략도는 상기에서 설명한 구성에 있어서 감속비를 조절하여 저 감속비로 구성하기 위한 일 실시예로서, 상기 1st-2nd 기어(11)를 아이들 기어(13)로 대체하여 구성하는 방법이다. The schematic diagram of FIG. 5 is an example of adjusting the reduction ratio in the configuration described above to achieve a low reduction ratio, and is a method of replacing the 1st-2nd gear 11 with the idle gear 13.
아이들 기어(13)는 1st-2nd 기어(11)를 대체하여 차동축(45) 위에 차동축(45)의 회전과 별개로 회전 가능하게 차동축(45)에 지지되어 설치된다. 이때 동력 전달은 도 3의 개략도에 표시한 것과 같이 전기모터(1)에서 발생한 동력이 입력기어(10)를 거쳐 아이들 기어(13)에 전달되고, 아이들 기어(13)와 기어 결합된 3rd 기어(12)를 거치면서 입력기어(10)와 3rd 기어(12)의 감속비로 감속되어 3rd 기어(12)와 연결된 태양기어(21, 31)에 전달되어 제1, 제2유성기어감속기(20, 30)로 전달되어 최종감속이 발생하고 차축(2)을 통해 구동륜(3)에 전달된다. 이때 차동장치(40)는 상기 설명과 동일하게 동작한다. The idle gear 13 replaces the 1st-2nd gear 11 and is installed on the differential shaft 45 while being supported on the differential shaft 45 so that it can rotate independently of the rotation of the differential shaft 45. At this time, as shown in the schematic diagram of FIG. 3, the power generated from the electric motor 1 is transmitted to the idle gear 13 through the input gear 10, and the 3rd gear (3rd gear) coupled to the idle gear 13. 12), the speed is reduced to the reduction ratio of the input gear 10 and the 3rd gear 12, and is transmitted to the sun gears 21 and 31 connected to the 3rd gear 12, and the first and second planetary gear reducers 20 and 30. ), where final deceleration occurs, and is transmitted to the drive wheel (3) through the axle (2). At this time, the differential device 40 operates in the same manner as described above.
도 6의 개략도는 도시된 것과 같이, 상기 설명과 동일한 구성에 있어서 제1, 제2유성기어감속기의 캐리어(24, 34)의 외측에 외치기어(44)가 구비되어 차동장치(40)의 차동 아이들 기어(42), 제2차동기어(43)와 기어 결합할 수 있게 구성되고, 각각의 링 기어(23, 33)의 일측에 차축(2)이 연결되어 출력을 구동륜(3)에 전달할 수 있도록 구성될 수 있다. As shown in the schematic diagram of FIG. 6, in the same configuration as the above description, an external gear 44 is provided on the outside of the carriers 24 and 34 of the first and second planetary gear reducers to operate the differential of the differential device 40. It is configured to be gear-coupled with the idle gear 42 and the second differential gear 43, and the axle 2 is connected to one side of each ring gear 23 and 33 to transmit output to the driving wheel 3. It can be configured so that
도 7의 개략도는 도시된 것과 같이, 1st-2nd 기어(11) 대신하여 아이들 기어(13)가 구비되어 저감속비로 구성되며, 캐리어(24, 34)의 외측에 외치기어(44)가 구성되어 차동장치(40)의 차동 아이들 기어(42), 제2차동기어(43)와 기어 결합할 수 있게 구성되고, 각각의 링 기어(23, 33)의 일측에 차축(2)이 연결되어 출력을 구동륜(3)에 전달할 수 있도록 구성될 수 있다. As shown in the schematic diagram of FIG. 7, an idle gear 13 is provided instead of the 1st-2nd gear 11 and is configured to have a reduced speed ratio, and an external gear 44 is configured on the outside of the carriers 24 and 34. It is configured to be gear-coupled with the differential idle gear 42 and the second differential gear 43 of the differential device 40, and an axle 2 is connected to one side of each ring gear 23 and 33 to provide output. It may be configured to transmit to the driving wheel (3).
본 발명의 상세한 설명에서는 구체적인 실시예에 관해 설명하고 있으나, 본 발명의 범주에서 벗어나지 않는 한도 내에서 다양한 변형이 가능함은 물론이다. 그럼으로 본 발명의 보호 범위는 실시예에 국한되어 정해져서는 안되며, 후술하는 청구범위 뿐만 아니라 균등한 것들에 의해 정해져야 한다.In the detailed description of the present invention, specific embodiments are described, but of course, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should not be limited to the examples, but should be determined by equivalents as well as the claims described later.
1 전기모터 2 차축 3 구동륜 10 입력기어
11 1st-2nd기어 11a 1st기어 11b 2nd기어 12 3rd기어
13 아이들 기어
20 제1유성기어감속기 21 제1유성기어감속기 태양기어
22 제1유성기어감속기 유성기어 23 제1유성기어감속기 링 기어
24 제1유성기어감속기 캐리어
30 제2유성기어감속기 31 제2유성기어감속기 태양기어
32 제2유성기어감속기 유성기어 33 제2유성기어감속기 링 기어
34 제2유성기어감속기 캐리어
40 차동장치
41 제1차동기어 42 차동 아이들 기어 43 제2차동기어
44 외치기어 45 차동축1 Electric motor 2 Axle 3 Drive wheel 10 Input gear
11 1st-2nd gear 11a 1st gear 11b 2nd gear 12 3rd gear
13 kids gear
20 1st planetary gear reducer 21 1st planetary gear reducer sun gear
22 1st planetary gear reducer planetary gear 23 1st planetary gear reducer ring gear
24 1st planetary gear reducer carrier
30 2nd planetary gear reducer 31 2nd planetary gear reducer sun gear
32 2nd planetary gear reducer planetary gear 33 2nd planetary gear reducer ring gear
34 2nd planetary gear reducer carrier
40 differential
41 1st differential gear 42 Differential idle gear 43 2nd differential gear
44 External gear 45 Differential shaft
Claims (4)
상기 차축(2)은 각각의 차축(2)에 연결된 유성기어감속기(20, 30)를 포함한 입력 기어(10), 1st-2nd 기어(11), 3rd 기어(12)를 거치며 감속된 회전을 출력하여, 상기 입력 기어(10)가 전기모터(1)에 의해 구동될 수 있고,
상기 분리된 2개의 차축(2)은 제1,제2유성기어감속기(20, 30)의 캐리어(24, 34)와 동력 전달 가능하게 연결되어 있으며,
상기 차동장치(40)는 상기 유성기어감속기(20, 30)의 링 기어(23, 33)의 외측에 형성된 외치 기어(44)와, 축의 양측이 베어링으로 회전가능하게 고정되는 차동축(45)의 일측에 차동축(45)과 동일한 회전을 할 수 있도록 고정되어 설치되며 상기 링 기어(23, 33)의 외치 기어(44)와 기어 결합하는 제2차동기어(43)와, 상기 차동축(45)의 타측에 차동축(45)과 동일한 회전을 할 수 있도록 고정되어 설치되며 상기 외치 기어(44)와 간섭되지 않도록 유격을 가지며 배치되는 제1차동기어(41)와, 상기 제1차동기어(41)와 기어 결합하고 그와 동시에 상기 외치 기어(44)와 기어 결합하도록 배치되는 차동 아이들 기어(42)를 포함하여 구비되고,
동시에 상기 1st-2nd 기어(11)가 상기 차동장치(40)의 차동축(45)에 회전 가능하게 지지되어 설치되는 것을 특징으로 하는 전기자동차용 트랜스액슬의 기어 구조.Two separated axles (2) and first and second planetary gear reducers (20, 30) respectively connected to the separated axles (2), and the first and second planetary gear reducers (20.30) A differential device 40 to which a part of one of the different sides is connected, a 3rd gear 12 to which the sun gears 21 and 31 of the first and second planetary gear reducers 20 and 30 are connected, and the 3rd gear 12 A 1st-2nd gear (11) consisting of a multi-stage gear, including a 2nd gear (11b) that engages with the gear and a 1st gear (11a) that engages with the input gear (10) of the electric motor, and the 1st gear (11a) and the gear It is provided with an electric motor (1) including an input gear (10) that engages,
The axle (2) outputs reduced rotation through an input gear (10), a 1st-2nd gear (11), and a 3rd gear (12) including planetary gear reducers (20, 30) connected to each axle (2). Thus, the input gear 10 can be driven by the electric motor 1,
The two separated axles (2) are connected to the carriers (24, 34) of the first and second planetary gear reducers (20, 30) to enable power transmission,
The differential device 40 includes an external gear 44 formed on the outside of the ring gears 23 and 33 of the planetary gear reducers 20 and 30, and a differential shaft 45 on which both sides of the shaft are rotatably fixed with bearings. A second differential gear 43 is fixed and installed on one side so as to rotate the same as the differential shaft 45 and is gear-coupled with the external gear 44 of the ring gears 23 and 33, and the differential shaft ( A first differential gear 41 is fixed and installed on the other side of the differential shaft 45 to rotate the same way as the differential shaft 45 and is disposed with a gap so as not to interfere with the external gear 44, and the first differential gear 41 It is provided with a differential idle gear (42) arranged to be gear-engaged with (41) and simultaneously gear-engaged with the external gear (44),
At the same time, the gear structure of the transaxle for an electric vehicle, characterized in that the 1st-2nd gear (11) is rotatably supported and installed on the differential shaft (45) of the differential device (40).
상기 차축(2)은 각각의 차축(2)에 연결된 유성기어감속기(20, 30)를 포함한 입력 기어(10), 아이들 기어(13), 3rd 기어(12)를 거치며 감속된 회전을 출력하여, 상기 입력 기어(10)가 전기모터(1)에 의해 구동될 수 있고,
상기 분리된 2개의 차축(2)은 제1,제2유성기어감속기(20. 30)의 캐리어(24, 34)와 동력 전달 가능하게 연결되어 있으며,
상기 차동장치(40)는 상기 유성기어감속기(20, 30)의 링 기어(23, 33)의 외측에 형성된 외치 기어(44)와, 축의 양측이 베어링으로 회전가능하게 고정되는 차동축(45)의 일측에 차동축(45)과 동일한 회전을 할 수 있도록 고정되어 설치되며 상기 링 기어(23, 33)의 외치 기어(44)와 기어 결합하는 제2차동기어(43)와, 상기 차동축(45)의 타측에 차동축(45)과 동일한 회전을 할 수 있도록 고정되어 설치되며 상기 외치 기어(44)와 간섭되지 않도록 유격을 가지며 배치되는 제1차동기어(41)와, 상기 제1차동기어(41)와 기어 결합하고 그와 동시에 상기 외치 기어(44)와 기어 결합하도록 배치되는 차동 아이들 기어(42)를 포함하여 구비되고,
동시에 상기 아이들 기어(13)가 상기 차동장치(40)의 차동축(45)에 회전 가능하게 지지되어 배치되는 것을 특징으로 하는 전기자동차용 트랜스액슬의 기어 구조.Two separated axles (2) and first and second planetary gear reducers (20.30) respectively connected to the separated axles (2), and the first and second planetary gear reducers (20.30) A differential device 40 connected to a different side, a 3rd gear 12 connected to the sun gear 21 of the first and second planetary gear reducers 20 and 30, and a gear coupling with the 3rd gear 12 It is provided with an electric motor (1) including an idle gear (13) and an input gear (10) coupled to the idle gear (13),
The axle 2 outputs reduced rotation through an input gear 10, an idle gear 13, and a 3rd gear 12 including planetary gear reducers 20 and 30 connected to each axle 2, The input gear 10 may be driven by an electric motor 1,
The two separated axles (2) are connected to the carriers (24, 34) of the first and second planetary gear reducers (20 and 30) to enable power transmission,
The differential device 40 includes an external gear 44 formed on the outside of the ring gears 23 and 33 of the planetary gear reducers 20 and 30, and a differential shaft 45 on which both sides of the shaft are rotatably fixed with bearings. A second differential gear 43 is fixed and installed on one side so as to rotate the same as the differential shaft 45 and is gear-coupled with the external gear 44 of the ring gears 23 and 33, and the differential shaft ( A first differential gear 41 is fixed and installed on the other side of the differential shaft 45 to rotate the same way as the differential shaft 45 and is disposed with a gap so as not to interfere with the external gear 44, and the first differential gear 41 It is provided with a differential idle gear (42) arranged to be gear-engaged with (41) and simultaneously gear-engaged with the external gear (44),
At the same time, the gear structure of the transaxle for an electric vehicle, characterized in that the idle gear (13) is rotatably supported and disposed on the differential shaft (45) of the differential device (40).
According to claim 3, the first and second planetary gear reducers (20, 30) are symmetrically provided with the same number of teeth and gear ratios, and the external gears of the first planetary gear reducer (20) or the second planetary gear reducer (30) For an electric vehicle, characterized in that the differential idle gear 42 and the second differential gear 43 of the differential device 40, which can be geared to (44), can be provided as the same gear with the same number of teeth and potential. Transaxle gear structure.
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| US20050006967A1 (en) * | 2003-04-07 | 2005-01-13 | Graziano Trasmissioni S.P.A. | Motor-driven axle for a motor vehicle |
| CN105398288A (en) | 2015-11-13 | 2016-03-16 | 天津市宏江工贸有限公司 | Drive axle for electric vehicle |
| KR101910748B1 (en) * | 2017-10-12 | 2018-10-22 | 유순기 | Differential gear and reducer installation structure for electric vehicle |
| KR20200091703A (en) * | 2019-01-23 | 2020-07-31 | 엘지전자 주식회사 | Driving apparatus for electric vehicle |
| KR102321809B1 (en) * | 2020-07-28 | 2021-11-03 | 유순기 | Electric vehicle trans axle that have hollow shaft type motor |
-
2022
- 2022-08-16 KR KR1020220101907A patent/KR102634266B1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050006967A1 (en) * | 2003-04-07 | 2005-01-13 | Graziano Trasmissioni S.P.A. | Motor-driven axle for a motor vehicle |
| CN105398288A (en) | 2015-11-13 | 2016-03-16 | 天津市宏江工贸有限公司 | Drive axle for electric vehicle |
| KR101910748B1 (en) * | 2017-10-12 | 2018-10-22 | 유순기 | Differential gear and reducer installation structure for electric vehicle |
| KR20200091703A (en) * | 2019-01-23 | 2020-07-31 | 엘지전자 주식회사 | Driving apparatus for electric vehicle |
| KR102321809B1 (en) * | 2020-07-28 | 2021-11-03 | 유순기 | Electric vehicle trans axle that have hollow shaft type motor |
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