WO2019244564A1 - Dispositif d'entraînement de véhicule - Google Patents

Dispositif d'entraînement de véhicule Download PDF

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Publication number
WO2019244564A1
WO2019244564A1 PCT/JP2019/020722 JP2019020722W WO2019244564A1 WO 2019244564 A1 WO2019244564 A1 WO 2019244564A1 JP 2019020722 W JP2019020722 W JP 2019020722W WO 2019244564 A1 WO2019244564 A1 WO 2019244564A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
vehicle
lubricating oil
drive device
differential
Prior art date
Application number
PCT/JP2019/020722
Other languages
English (en)
Japanese (ja)
Inventor
昇悟 竹田
Original Assignee
ダイムラー・アクチェンゲゼルシャフト
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ダイムラー・アクチェンゲゼルシャフト filed Critical ダイムラー・アクチェンゲゼルシャフト
Publication of WO2019244564A1 publication Critical patent/WO2019244564A1/fr

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Classifications

    • 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
    • B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric 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
    • B60K17/16—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
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating

Definitions

  • the present invention relates to a vehicle drive device for transmitting a driving force of a motor to a differential portion of a vehicle.
  • a vehicle drive device that includes a motor and a speed reduction mechanism including a plurality of gears, and that can transmit the driving force of the motor to a differential gear connected to drive wheels is known.
  • a vehicle drive device that includes a motor and a speed reduction mechanism including a plurality of gears, and that can transmit the driving force of the motor to a differential gear connected to drive wheels is known.
  • the present invention has been made in view of such a situation, and aims at ensuring the lubricity of a differential gear while suppressing the number of parts, cost, and agitation resistance of lubricating oil in a reduction mechanism. It is an object of the present invention to provide a vehicular drive device that can perform the above.
  • a vehicle drive device includes a motor mounted on a vehicle and an output gear connected to a differential section of the vehicle, the output gear being connected to the motor via a connection gear.
  • a drive mechanism for transmitting the driving force of the vehicle comprising: a housing for accommodating the speed reduction mechanism; and a lubrication device in the housing, the lubrication being scraped up by the connection gear of the speed reduction mechanism in the housing.
  • a lubricating oil supply passage provided to supply oil to the bevel gear of the differential section.
  • a device such as an oil pump for forcibly lubricating the lubricating oil is provided. At least, the lubricating oil can be supplied to the differential unit by rotating the coupling gear even in various running situations, and the lubrication of the differential unit can be ensured.
  • the lubricating oil supply path may be provided along a contact surface of a virtual circle formed by gear tooth end surfaces when the connection gear rotates. This makes it possible to introduce the scooped lubricating oil toward the lubricating oil supply path by utilizing the rotation and gravity of the connecting gear. Further, the lubricating oil can be efficiently supplied to the differential unit via the lubricating oil supply path, and the lubricity of the differential unit can be further improved.
  • 1 is a top view of a vehicle drive device according to an embodiment of the present invention. It is a top view showing the composition inside the housing in the state where the housing of the drive system for vehicles concerning one embodiment of the present invention was cut up and down. It is a side view showing the relation between the gear of the drive device for vehicles concerning one embodiment of the present invention, and the internal space which stores a gear. 1 is a rear view of a vehicle drive device according to an embodiment of the present invention.
  • FIG. 1 is a top view of the vehicle drive device 1 according to the present embodiment.
  • the vehicle length direction A is the front-back direction of the vehicle on which the vehicle drive device 1 is mounted
  • the vehicle width direction B is the left-right direction of the vehicle on which the vehicle drive device 1 is mounted. It is. That is, each direction indicates a direction in a state where the vehicle drive device 1 is mounted on the vehicle.
  • the vehicle drive device 1 is a drive source that is mounted on an electric vehicle and converts supplied power into power for running the vehicle.
  • the electric vehicle is, for example, an electric commercial vehicle such as an electric truck, but is not limited to this, and may be an electric passenger vehicle obtained by electrifying a general passenger vehicle.
  • the vehicle drive device 1 includes a motor 2, a speed reduction mechanism 3, a differential unit 4, and a housing 5 that houses these components.
  • the motor 2 converts electric power supplied from a battery (not shown) mounted on the vehicle together with the vehicle driving device 1 into a rotational motion and outputs the rotational motion. As shown in FIG. 1, the motor 2 includes a main body 2a and an output shaft 2b.
  • the reduction mechanism 3 includes an input unit 11 connected to the output shaft 2 b of the motor 2, a middle unit 12 connected to the input unit 11, and an output unit 13 located between the middle unit 12 and the differential unit 4. This is a two-stage reducer.
  • the input unit 11, the middle unit 12, and the output unit 13 are connected to each other as a gear mechanism. Then, the speed reduction mechanism 3 reduces the rotational motion input from the motor 2 to the input unit 11 to a rotational speed suitable for traveling of the vehicle, and outputs the rotation from the output unit 13.
  • more detailed configurations of the input unit 11, the middle unit 12, and the output unit 13 will be described later.
  • the differential unit 4 has a rotating shaft connected to an axle (not shown) of a driving wheel of the vehicle, and performs a rotational motion output from the output unit 13 while absorbing a difference in the number of revolutions during turning, for example, while driving the left and right driving wheels. , The drive wheels are rotated. Thereby, the vehicle drive device 1 can run the vehicle by rotating the drive wheels of the vehicle through the speed reduction mechanism 3 and the differential unit 4 with the drive force generated by the motor 2. Note that a more detailed configuration of the differential unit 4 will be described later.
  • the housing 5 includes a motor housing 5a that houses the motor 2, a speed reduction mechanism 3, and a gear housing 5b that houses the differential unit 4.
  • the motor housing 5a protects and supports the motor 2 housed therein, and also prevents lubricating oil used for the motor 2 from leaking out.
  • the motor housing 5a is connected to a predetermined position of the gear housing 5b so that the motor 2 and the speed reduction mechanism 3 are appropriately connected.
  • the gear housing 5b protects and supports the reduction mechanism 3 and the differential unit 4 housed therein, and also prevents the lubricating oil used for the reduction mechanism 3 and the differential unit 4 from leaking out.
  • the speed reduction mechanism 3 and the differential unit 4 are housed in one gear housing 5b in the present embodiment, they may be housed individually in two housings as long as they are connected to each other.
  • FIG. 2 is a top view showing the internal configuration of the housing 5 in a state where the housing 5 of the vehicle drive device 1 according to one embodiment of the present invention is cut vertically and the upper housing is removed.
  • FIG. 3 is a side view showing the relationship between the gears of the vehicle drive device 1 according to the embodiment of the present invention and the internal space accommodating the gears. 2 and 3, similarly to FIG. 1, the vehicle length direction A is the front-rear direction of the vehicle on which the vehicle drive device 1 is mounted, and the vehicle width direction B is the vehicle drive direction 1.
  • the middle portion 12 includes a connection gear 22 that meshes with the input portion 11 serving as an input gear, a connection gear 23 having a smaller diameter than the connection gear 22, and the connection gear 22 and the connection gear 23. It is composed of a shaft 24 which is connected to be a rotating shaft.
  • the output unit 13 includes a connection gear 25 that meshes with the connection gear 23, an output gear 26 having a smaller diameter than the connection gear 25, and a shaft 27 that connects the connection gear 25 and the output gear 26 to be a rotating shaft. Have been. With such a configuration of the speed reduction mechanism 3, the rotation speed of the motor 2 is reduced in two stages and transmitted to the differential unit 4.
  • the differential unit 4 includes a final gear 31 that meshes with the output gear 26, and a differential case 32 integrally provided on the surface of the final gear 31.
  • the differential section 4 includes a right differential side gear 33, a left differential side gear 34, and two differential pinion gears 35 and 36 housed in a differential case 32.
  • the right differential side gear 33, the left differential side gear 34, and the differential pinion gears 35 and 36 are general bevel gears. With these members, the differential section 4 constitutes a general differential gear.
  • the respective gears constituting the speed reduction mechanism 3 and the differential unit 4 are arranged along the vehicle length direction A. Therefore, the mountability of the vehicle drive device 1 in the electric vehicle is improved. That is, the vehicle drive device 1 according to the present embodiment can be easily mounted on a general electric truck, and can be used for various types of vehicles.
  • the inner wall surface 5c of the housing 5 is close to the gears forming the speed reduction mechanism 3 and the differential unit 4 in the vehicle height direction C. For this reason, even if lubricating oil is not added in such an amount that most of the gear housing 5b is filled, each gear is easily immersed in the lubricating oil, and the increase in the stirring resistance of the lubricating oil is suppressed. As a result, lubricity for each gear is ensured.
  • FIG. 4 is a rear view of the vehicle drive device 1 according to one embodiment of the present invention, in which a part of the speed reduction mechanism 3 and the differential unit 4 are visualized.
  • the vehicle length direction A is the front-back direction of the vehicle on which the vehicle drive device 1 is mounted
  • the vehicle height direction C is the vehicle drive device 1.
  • the lubricating oil is present in the internal space of the housing 5 so as to immerse a part of each of the connection gear 22, the connection gear 25, and the final gear 31. That is, the oil surface 40 of the lubricating oil is located higher than the lower end surfaces of the connection gear 22, the connection gear 25, and the final gear 31. Therefore, the rotation of the connection gear 22, the connection gear 25, and the final gear 31 ensures the lubricity of each tooth of the connection gear 22, the connection gear 25, and the final gear 31.
  • the input unit 11, the connecting gear 23, and the output gear 26, which are input gears, are not immersed in the lubricating oil, but are engaged with the connecting gear 22, the connecting gear 25, and the final gear 31 immersed in the lubricating oil.
  • the lubricating oil is supplied via the connection gear 22, the connection gear 25, and the final gear 31. Thereby, lubricity of each tooth of the input unit 11, the connecting gear 23, and the output gear 26 is ensured. Further, lubricating oil is supplied to each bevel gear accommodated in the differential case 32 via an opening (not shown) provided in the differential case 32.
  • the gear housing 5b is provided with a lubricating oil supply passage 41 extending from above the coupling gear 25 toward the differential portion 4. More specifically, the lubricating oil supply passage 41 extends from an opening (introduction port) provided in the wall of the gear housing 5 b located behind the top of the coupling gear 25 to the right central end of the differential unit 4. It is formed as a communication hole extending to an opening (discharge port) provided in the wall of the gear housing 5b located above. In particular, the opening serving as the discharge port of the lubricating oil supply passage 41 is located immediately above the right differential side gear 33 protruding from the differential case 32.
  • the lubricating oil supply passage 41 is provided along a contact surface of a virtual circle (circumferential portion of the connection gear 25) formed by the gear tooth end surfaces when the connection gear 25 rotates. Have been. That is, on the side surface of the vehicle drive device 1, the lubricating oil supply path 41 is provided with its inlet port close to one point on the outer edge of the connection gear 25 so as to be in contact with one point on the outer edge. .
  • the lubricating oil around the connecting gear 25 is scraped up along the circumference of the connecting gear 25 as shown by an arrow D in FIG. 3 and the arrow E in FIG. 4, the oil reaches the right differential side gear 33 of the differential section 4 via the lubricating oil supply path 41.
  • the lubricating oil scooped up by the connection gear 25 is transmitted through the inside of the wall of the gear housing 5b, and is supplied to the right differential side gear 33 which is a bevel gear.
  • the lubricating oil supplied to the right differential side gear 33 is transmitted from the right differential side gear 33 into the differential case 32, and is also supplied to the other bevel gears, that is, the left differential side gear 34 and the differential pinion gears 35 and 36. Therefore, the lubricating oil can be satisfactorily supplied to each bevel gear in the differential case 32 that is not immersed in the lubricating oil, and the lubricity of the differential section 4 can be improved.
  • the connecting gear 25 rotates to supply the lubricating oil. By scooping up, lubricating oil can be supplied to the differential unit 4.
  • the lubricating oil is supplied to the differential portion 4 even in various driving situations without providing a device such as an oil pump for forcibly lubricating the lubricating oil.
  • the lubrication of the differential section 4 can be ensured. Further, since the inner wall surface 5c of the housing 5 is close to the gears of the speed reduction mechanism 3 and the differential section 4, the resistance of the lubricating oil to stirring in the speed reduction mechanism is suppressed.
  • the lubricating oil supply path 41 is provided along the tangent surface of the virtual circle formed by the gear tooth end faces.
  • the lubricating oil thus scooped can be introduced toward the inlet of the lubricating oil supply passage 41 using the lubricating oil.
  • the lubricating oil can be efficiently supplied to the differential unit 4 via the lubricating oil supply path 41, and the lubricity of the differential unit 4 can be further improved.
  • the lubricity of the differential portion 4 can be improved without increasing the energy load.

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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)
  • Power Engineering (AREA)
  • General Details Of Gearings (AREA)
  • Motor Power Transmission Devices (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Retarders (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un dispositif d'entraînement de véhicule avec lequel il est possible d'assurer la lubrification d'un engrenage différentiel tout en limitant le nombre de constituants et le coût, et la résistance à l'agitation d'une huile lubrifiante dans un mécanisme de réduction de vitesse. À cet effet, l'invention porte sur un dispositif d'entraînement de véhicule qui est pourvu d'un moteur installé dans un véhicule, et d'un mécanisme de réduction de vitesse destiné à transmettre une force d'entraînement depuis le moteur, par l'intermédiaire d'un engrenage d'accouplement, à un engrenage de sortie accouplé à une unité différentielle du véhicule, le dispositif d'entraînement de véhicule comprenant un boîtier destiné à recevoir le mécanisme de réduction de vitesse, et, dans le boîtier, un trajet d'alimentation en huile de lubrification conçu de sorte à fournir une huile de lubrification tirée vers le haut par l'engrenage d'accouplement du mécanisme de réduction de vitesse à l'intérieur du boîtier, à un engrenage conique de l'unité différentielle.
PCT/JP2019/020722 2018-06-19 2019-05-24 Dispositif d'entraînement de véhicule WO2019244564A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-115967 2018-06-19
JP2018115967A JP2019218989A (ja) 2018-06-19 2018-06-19 車両用駆動装置

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Publication Number Publication Date
WO2019244564A1 true WO2019244564A1 (fr) 2019-12-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113790261A (zh) * 2021-11-15 2021-12-14 常州市天磊传动机械有限公司 润滑油搅动机构及使用其的齿轮减速机
WO2022141242A1 (fr) * 2020-12-30 2022-07-07 华为数字能源技术有限公司 Procédé et dispositif de commande

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023048737A (ja) * 2021-09-28 2023-04-07 株式会社アイシン 車両用駆動装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010053997A (ja) * 2008-08-29 2010-03-11 Toyota Motor Corp 動力伝達装置
JP2013060976A (ja) * 2011-09-12 2013-04-04 Showa Corp 終減速装置の潤滑構造

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010053997A (ja) * 2008-08-29 2010-03-11 Toyota Motor Corp 動力伝達装置
JP2013060976A (ja) * 2011-09-12 2013-04-04 Showa Corp 終減速装置の潤滑構造

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022141242A1 (fr) * 2020-12-30 2022-07-07 华为数字能源技术有限公司 Procédé et dispositif de commande
CN113790261A (zh) * 2021-11-15 2021-12-14 常州市天磊传动机械有限公司 润滑油搅动机构及使用其的齿轮减速机
CN113790261B (zh) * 2021-11-15 2022-02-25 常州市天磊传动机械有限公司 润滑油搅动机构及使用其的齿轮减速机

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Publication number Publication date
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