WO2021250779A1 - 駆動装置の保護構造 - Google Patents

駆動装置の保護構造 Download PDF

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Publication number
WO2021250779A1
WO2021250779A1 PCT/JP2020/022698 JP2020022698W WO2021250779A1 WO 2021250779 A1 WO2021250779 A1 WO 2021250779A1 JP 2020022698 W JP2020022698 W JP 2020022698W WO 2021250779 A1 WO2021250779 A1 WO 2021250779A1
Authority
WO
WIPO (PCT)
Prior art keywords
flange
gearbox
generator
drive device
electric machine
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2020/022698
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
ジェハク イ
悠太 勝島
健嗣 新井
大輔 朝倉
晴信 安部
浩平 山田
典久 辻村
泰明 中村
寿光 柿▲崎▼
和浩 間口
健太郎 倉田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2021564847A priority Critical patent/JP7184212B2/ja
Priority to PCT/JP2020/022698 priority patent/WO2021250779A1/ja
Priority to EP20940114.0A priority patent/EP4163520B1/en
Priority to MX2022001446A priority patent/MX2022001446A/es
Priority to US17/630,752 priority patent/US11953084B2/en
Priority to BR112022002050A priority patent/BR112022002050A2/pt
Priority to CN202080052888.7A priority patent/CN114144605B/zh
Publication of WO2021250779A1 publication Critical patent/WO2021250779A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/031—Gearboxes; Mounting gearing therein characterised by covers or lids for gearboxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2072—Floor protection, e.g. from corrosion or scratching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0861—Insulating elements, e.g. for sound insulation for covering undersurfaces of vehicles, e.g. wheel houses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—Front or rear frames
    • B62D21/155—Sub-frames or underguards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D35/00—Vehicle bodies characterised by streamlining
    • B62D35/02—Streamlining the undersurfaces
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02034—Gearboxes combined or connected with electric machines
    • 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
    • Y02T10/62—Hybrid vehicles

Definitions

  • the present invention relates to a protective structure for a drive device.
  • JP2010-000859A discloses a drive device for a hybrid vehicle in which a gear is housed between an engine and a motor (rotary electric machine).
  • a drive device like the conventional technology is provided in the engine room, and the lower part thereof faces the road surface via an undercover or the like.
  • a large external force such as an impact may be input from the road surface side.
  • the bolt or the like that fixes the connecting portion of the housing may loosen.
  • the axis of rotation between the gearbox and the rotary electric machine may shift, causing problems in power transmission.
  • the present invention has been made in view of such a problem, and is a drive device capable of suppressing loosening of the connection even when a large external force is input from below to the connection portion of the flange connecting the gearbox and the rotary electric machine.
  • the purpose is to provide a protective structure for.
  • One embodiment of the present invention is applied to a protective structure of a drive device including a drive device including a rotary electric machine and a gearbox, and an undercover arranged below the drive device.
  • the rotary electric machine and the gearbox are connected to each other by the rotary electric machine flange of the rotary electric machine housing and the gearbox flange of the gearbox housing.
  • the rotary electric machine flange and the gearbox flange are formed so that the lower surface of the gearbox flange is located below the lower surface of the rotary electric machine flange.
  • the undercover comprises a protective plate made of a material that is more rigid than the material of the undercover.
  • the protective plate is provided on the lower side of the connecting portion between the rotary electric machine flange and the gearbox flange so as to face the connecting portion.
  • the protective plate since the protective plate is provided on the lower side of the connecting portion between the rotary electric machine flange and the gearbox flange, the protective plate hits the gearbox flange first when an external force is input from below, and the gearbox flange The direction of the load input to the rotary electric machine flange and the direction of the load input to the rotary electric machine flange can be changed. As a result, loosening of the connecting portion between the rotary electric machine flange and the gearbox flange is suppressed.
  • FIG. 1 is a front view of a drive device for a vehicle according to an embodiment of the present invention.
  • FIG. 2 is a side view illustrating a gearbox flange of a gearbox housing of a drive unit.
  • FIG. 3 is an explanatory diagram of the protective plate.
  • FIG. 4 is an explanatory diagram of a protective plate when a load is input.
  • FIG. 5 is an explanatory diagram of a protective plate of a modified example.
  • FIG. 6 is an explanatory diagram of a protective plate of another modified example.
  • FIG. 1 is a front view of the drive device 1 for a vehicle according to the present embodiment.
  • the front means the direction when the drive device is observed from the front in the front-rear direction of the vehicle.
  • the drive device 1 includes an engine 10, a gearbox 20, a generator 30 as a rotary electric machine, and a drive motor 40.
  • An undercover 50 is provided on the lower side of the drive device 1.
  • the engine 10 generates electricity by driving the generator 30 to rotate.
  • the electric power generated by the generator 30 is stored in a battery (not shown).
  • the drive motor 40 is a driving force source for the vehicle and is driven by being supplied with the electric power of the battery.
  • the gearbox 20 is a transmission having a plurality of gears.
  • the gearbox 20 generates electricity by transmitting the rotation input from the engine 10 to the generator 30. Further, the gearbox 20 drives the vehicle by transmitting the rotation input from the drive motor 40 to the drive wheels (not shown).
  • the drive motor 40 also functions as a generator that generates electricity (regeneration) by receiving a driving force due to the rotation of the drive wheels.
  • the drive device 1 of the present embodiment may be used as a drive device for a device other than a vehicle, for example, various electric devices or industrial machines.
  • the generator 30 is arranged on the front side of the drive motor 40 and slightly below the drive motor 40.
  • the engine mount 11 is provided in the upper left portion of the engine 10, and the motor mount 41 is provided in the upper right portion of the drive motor 40.
  • the drive device 1 is an integral unit of the engine 10, the gearbox 20, the generator 30, and the drive motor 40, and the drive device 1 is attached to the vehicle via the engine mount 11 and the motor mount 41. It is fixed. Since the engine mount 11 and the motor mount 41 are provided with a cushioning material such as rubber, vibration and impact transmitted between the vehicle and the drive device 1 are buffered.
  • the undercover 50 is provided below the drive device 1.
  • the undercover 50 is formed of a material such as resin so as to cover the lower surface of various parts arranged under the vehicle such as the drive device 1.
  • the undercover 50 includes a protective plate 55, which will be described later, and functions as a protective member for protecting the drive device 1.
  • the gearbox 20 has a gearbox housing 21 in which a gear mechanism composed of a plurality of gears is housed.
  • the gearbox housing 21 has a tubular shape with a hollow inside. Flange portions for connecting to the engine 10, the generator 30, and the drive motor 40 by bolting are formed on both ends of the gearbox housing 21 so as to project from the periphery thereof.
  • the flange portion facing the generator 30, that is, the flange portion on the right side in FIG. 1 is particularly referred to as a gearbox flange 22.
  • the generator 30 has a cylindrical generator housing 31 that houses a rotary electric component made of a rotor, a stator, and the like.
  • the generator housing 31 is formed with a generator flange 32 projecting around the left end side (gearbox side) of the generator housing 31.
  • the generator 30 is connected to the gearbox 20 by fastening the gearbox flange 22 of the gearbox 20 and the generator flange 32 in contact with each other with bolts.
  • the generator 30 does not have a mount fixed to the vehicle, and has a so-called cantilever structure in which only one side in the rotation axis direction (left side in FIG. 1) is supported by the gearbox 20.
  • FIG. 2 is an explanatory view of the flange surface of the gearbox flange 22 of the gearbox 20 as viewed from the rotation axis direction (vehicle width direction) of the gearbox 20.
  • the flange surface (shown by hatching) of the gearbox flange 22 has a plurality of bolt taps 22a for fixing the generator 30.
  • the generator flange 32 of the generator 30 also has bolt holes, and the generator 30 is fixed to the gearbox 20 by inserting and fastening bolts through these bolt holes.
  • the drive motor 40 and the gearbox 20 are fixed, and the engine 10 and the gearbox 20 are fixed in the same manner.
  • the gearbox 20 is provided with an axle hole 25 through which the axle is inserted.
  • An axle (not shown) is connected to the final gear of the gearbox 20 in the axle hole 25.
  • the gearbox 20 and the generator 30 are connected by the gearbox flange 22 and the generator flange 32 as described above.
  • the external force is a load generated when an obstacle such as a curb on the road surface collides with the drive device 1.
  • the undercover 50 exists on the lower side of the drive device 1, but the undercover 50 is made of resin and protects the drive device 1 against a small external force due to a collision such as gravel during traveling, but exerts a large external force. When received, it easily deforms. Therefore, when a large external force is input, the external force is directly input below the drive device 1.
  • the generator 30 has a cantilever structure as described above, and does not have a mount that cushions the load. Therefore, the load input to the lower surface of the connecting portion 35 between the gearbox flange 22 and the generator flange 32 acts without being buffered, and is in the shear direction between the gearbox flange 22 and the generator flange 32. Acts as a force. This may cause loosening or twisting of the bolts that secure the gearbox flange 22 and the generator flange 32.
  • the position of the generator 30 with respect to the gearbox 20 may be displaced.
  • the center of the rotation shaft between the gearbox 20 and the generator 30 may be misaligned, which may cause a problem in power transmission.
  • this embodiment is configured so that the gearbox 20 and the generator 30 do not deviate from each other even when a large external force is input by the following configuration.
  • FIG. 3 is an enlarged view of the vicinity of the connection portion between the gearbox 20 and the generator 30 of the present embodiment, and is an explanatory view of the protective plate 55.
  • the flange surface of the gearbox flange 22 and the flange surface of the generator flange 32 are in contact with each other.
  • the bottom portion (lower surface) of the gearbox flange 22 is formed so as to be located slightly below the bottom portion (lower surface) of the generator flange 32. .. That is, the bottom of the gearbox flange 22 and the bottom of the generator flange 32 are not flush with each other, and are configured so that their positions in the height direction are different.
  • the undercover 50 is a cover member that covers the lower surface of the drive device 1, and a protective plate 55 is provided at a position facing the connecting portion 35 between the gearbox 20 and the generator 30.
  • the protective plate 55 is arranged at a position closer to the front of the vehicle (see FIG. 2).
  • the protective plate 55 is made of a material having a higher rigidity than the undercover 50 (for example, a metal such as steel or stainless steel).
  • the protective plate 55 is fixed to the upper surface of the undercover 50 facing the drive device 1 by a method such as bolting, welding, or riveting.
  • the protective plate 55 is provided facing both the lower surface of the gearbox flange 22 and the lower surface of the generator flange 32.
  • the protective plate 55 is arranged so as to face the generator flange 32 in the connecting direction between the gearbox flange 22 and the generator flange 32, and the length thereof (shown by B in FIG. 3) is the length of the generator flange 32. It is formed longer than the flange (thickness) (shown by A in FIG. 3).
  • FIG. 4 is an explanatory diagram of the behavior of the protective plate 55 when a large external force is input to the connecting portion 35 between the gearbox flange 22 and the generator flange 32.
  • the protective plate 55 hits the gearbox flange 22 first. Then, as shown in FIG. 4, the right side portion (the portion facing the generator 30) of the protective plate 55 is deformed so as to bend with the corner of the gearbox flange 22 as a fulcrum due to the load due to the external force.
  • the right part of the deformed protective plate 55 collides with the corner of the generator flange 32 and the generator housing 31 on the right side of the generator flange 32.
  • the length (thickness) of the generator flange 32 (shown by D in FIG. 4) is the length (thickness) of the gearbox flange 22. It may be formed smaller than (shown by C in FIG. 4).
  • the protective structure of the drive device 1 of the present embodiment includes a drive device 1 including a generator (rotary electric machine) 30 and a gearbox 20, and an undercover 50 arranged below the drive device 1.
  • the generator 30 and the gearbox 20 are connected to each other by the generator flange 32 of the generator housing 31 and the gearbox flange 22 of the gearbox housing 21.
  • the generator flange 32 and the gearbox flange 22 are formed so that the lower surface of the gearbox flange 22 is located below the lower surface of the generator flange 32.
  • the undercover 50 includes a protective plate 55 made of a material having a higher rigidity than the material of the undercover 50.
  • the protective plate 55 is provided on the lower side of the connecting portion 35 between the generator flange 32 and the gearbox flange 22 so as to face the connecting portion 35.
  • the protective plate 55 is arranged so as to face the generator flange 32 in the connecting direction between the generator flange 32 and the gearbox flange 22, and is formed longer than the length of the generator flange 32. With this configuration, the protective plate 55 first hits a portion other than the generator flange 32 due to an external force from below. As a result, in the connecting portion 35, the direction of the load input to the gearbox flange 22 and the direction of the load input to the generator flange 32 can be changed more reliably, so that the gearbox flange 22 and the generator can be changed more reliably. It is possible to suppress the direct application of the load in the shear direction to the flange 32.
  • FIG. 5 is an explanatory view of the protective plate 55 of the modified example of the present embodiment, and corresponds to FIG.
  • the generator housing 31 is formed with a protrusion 38 extending toward the protective plate 55 at a position different from that of the generator flange 32.
  • the protrusion 38 is configured as a protrusion extending downward from the lower surface of the generator housing 31, and is arranged at a position facing the protective plate 55.
  • the lower end surface of the protrusion 38 extends below the lower surface of the generator flange 32, and is located on the same level as or slightly above the lower end surface of the gearbox flange 22.
  • the generator housing 31 is extended downward from the lower surface of the generator housing 31 at a position different from the generator flange 32 and facing the protective plate 55.
  • the protrusion 38 is provided.
  • the protective plate 55 hits both the gearbox flange 22 and the protrusion 38 first, and the load is not directly input to the generator flange 32.
  • the gearbox flange 22 and the generator flange 32 are connected by changing the direction of the load input to the gearbox flange 22 and the direction of the load input to the generator flange 32. It is suppressed that a force in the shearing direction is applied to the portion 35.
  • FIG. 6 is an explanatory diagram of the protective plate 55 of another modification of the present embodiment, and corresponds to FIG.
  • the protective plate 55 has a proximity portion 55a in which the portion facing the gearbox flange 22 is closer than the portion facing the generator flange 32.
  • the proximity portion 55a is formed to have a large thickness in the plate pressure direction. That is, in another modification of the present embodiment, when the protective plate 55 is observed from the front, the plate thickness of the portion facing the gearbox flange 22 is larger than the plate thickness of the portion facing the generator flange 32. It is provided with a large formed proximity portion 55a. That is, the distance of the proximity portion 55a of the protective plate 55 from the gearbox flange 22 is smaller than the distance from the generator flange 32.
  • the proximity portion 55a of the protective plate 55 hits the gearbox flange 22 first, and the other portion of the protective plate 55 is shown in FIG. It is deformed in the same manner as shown in the above and collides with the corner of the generator flange 32 and the generator housing 31.
  • the gearbox flange 22 and the generator flange 32 are connected by changing the direction of the load input to the gearbox flange 22 and the direction of the load input to the generator flange 32. It is suppressed that a force in the shear direction is applied to the portion 35.
  • the protective plate 55 is arranged below the generator 30 on the front side of the vehicle, but the protective plate 55 may be arranged below the generator 30 on the rear side of the vehicle. Further, if the bottom surfaces of the gearbox flange 22 and the generator flange 32 are not uniform (inclined) in height in the front-rear direction of the vehicle, the protective plate 55 may be arranged at the lowest position.
  • the protective plate 55 When the protective plate 55 is arranged on the front side of the vehicle, it mainly protects the load input when the vehicle moves forward.
  • the protective plate 55 is arranged on the rear side of the vehicle, it mainly protects the load input when the vehicle reverses. Further, the protective plate 55 may be arranged in the front-rear direction of the generator 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Body Structure For Vehicles (AREA)
  • Motor Or Generator Frames (AREA)
  • Hybrid Electric Vehicles (AREA)
  • General Details Of Gearings (AREA)
  • Steering Controls (AREA)
PCT/JP2020/022698 2020-06-09 2020-06-09 駆動装置の保護構造 Ceased WO2021250779A1 (ja)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2021564847A JP7184212B2 (ja) 2020-06-09 2020-06-09 駆動装置の保護構造
PCT/JP2020/022698 WO2021250779A1 (ja) 2020-06-09 2020-06-09 駆動装置の保護構造
EP20940114.0A EP4163520B1 (en) 2020-06-09 2020-06-09 Protective structure for drive device
MX2022001446A MX2022001446A (es) 2020-06-09 2020-06-09 Estructura para proteger un dispositivo de impulso.
US17/630,752 US11953084B2 (en) 2020-06-09 2020-06-09 Structure for protecting drive device
BR112022002050A BR112022002050A2 (pt) 2020-06-09 2020-06-09 Estrutura para proteção de dispositivo de direção
CN202080052888.7A CN114144605B (zh) 2020-06-09 2020-06-09 驱动装置的保护结构

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/022698 WO2021250779A1 (ja) 2020-06-09 2020-06-09 駆動装置の保護構造

Publications (1)

Publication Number Publication Date
WO2021250779A1 true WO2021250779A1 (ja) 2021-12-16

Family

ID=78845455

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/022698 Ceased WO2021250779A1 (ja) 2020-06-09 2020-06-09 駆動装置の保護構造

Country Status (7)

Country Link
US (1) US11953084B2 (https=)
EP (1) EP4163520B1 (https=)
JP (1) JP7184212B2 (https=)
CN (1) CN114144605B (https=)
BR (1) BR112022002050A2 (https=)
MX (1) MX2022001446A (https=)
WO (1) WO2021250779A1 (https=)

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* Cited by examiner, † Cited by third party
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JP7184212B2 (ja) * 2020-06-09 2022-12-06 日産自動車株式会社 駆動装置の保護構造
JP7361145B2 (ja) * 2022-02-16 2023-10-13 本田技研工業株式会社 車両下部構造

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