Vehicle driving apparatus

• US 9,140,311 B2
• Filed: 03/04/2011
• Issued: 09/22/2015
• Est. Priority Date: 03/05/2010
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Iwase, Mikio, Suzuki, Tomohide, Jinnai, Naoya, Okishima, Tatsuya, Kamiya, Toshihiko
• Primary Examiner(s): Crawford, Gene
• Assistant Examiner(s): CHAU, TERRY C
• Application Number:
  US13/522,135
• Publication Number:
  US 20120318630A1
• Time in Patent Office: 1,663 Days
• Field of Search: 192/66.31, 192/85.34, 192/85.35, 192/85.38, 192/89.22, 192/89.24, 192/70.27, 192/70.28, 192/85.24, 192/109.A, 180/65.25, 903/914
• US Class Current: 1/1
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/441 Speed
• CPC Class Codes: B60L 3/0023 Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: F16D 2048/0212 Details of pistons for master or slave cylinders especially adapted for fluid control for other details of pistons in master or slave cylinders F16D2025/081 or F16D25/082
• CPC Class Codes: F16D 25/0638 with more than two discs, e.g. multiple lamellae
• CPC Class Codes: F16D 25/12 Details not specific to one of the before-mentioned types
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y10S 903/914 Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means

Abstract

A vehicle driving apparatus includes a rotating electrical machine and an engagement device, which are disposed on a power transmission path linking an input member drive-coupled to an internal combustion engine and an output member drive-coupled to a wheel. The engagement device includes an engagement input coupled to the input member, an engagement output that forms a pair with the engagement input and is coupled to the rotating electrical machine, a friction member disposed between the engagement input and the engagement output, and a pressing member that presses the friction member in a pressing direction. An oil pressure chamber is formed between the pressing member and either the engagement input or the engagement output. A biasing spring biases the pressing member in the pressing direction when no oil pressure is supplied to the oil pressure chamber and is disposed on an exterior of the oil pressure chamber.

Claims

1. A vehicle driving apparatus, comprising:

a rotating electrical machine; and

an engagement device, wherein

the rotating electrical machine and the engagement device are disposed on a power transmission path linking an input member drive-coupled to an internal combustion engine and an output member drive-coupled to a vehicle wheel,

the engagement device includes an engagement input side member coupled to the input member, an engagement output side member that forms a pair with the engagement input side member and is coupled to the rotating electrical machine, a friction member disposed between the engagement input side member and the engagement output side member, and a pressing member that presses the friction member in a pressing direction,

a working oil pressure chamber that is supplied with a working oil pressure for pressing the pressing member in the pressing direction is formed between the pressing member and either the engagement input side member or the engagement output side member,

a biasing spring that biases the pressing member in the pressing direction when no working oil pressure is supplied to the working oil pressure chamber is disposed on an exterior of the working oil pressure chamber,

the engagement output side member includes an axial direction extending portion that extends in an axial direction to cover at least a radial direction outer side of the friction member, and a radial direction extending portion that extends in a radial direction to an anti-pressing direction side that is in an opposite direction to the pressing direction relative to the friction member,

the working oil pressure chamber is formed on a radial direction inner side of the friction member,

the pressing member is provided to press the friction member from the radial direction extending portion side,

the biasing spring is disposed between the radial direction extending portion and the pressing member on a radial direction inner side of the axial direction extending portion and a radial direction outer side of the working oil pressure chamber, and

the pressing member includes a contact portion that is pressed by the biasing spring, the contact portion being disposed at a radial position outside of the radially outermost portion of the working oil pressure chamber.

2. The vehicle driving apparatus according to claim 1, wherein

the engagement output side member includes a fastening attachment portion formed thickly to bolt a rotor member of the rotating electrical machine formed integrally with the radial direction extending portion, and

the biasing spring is disposed to contact a step portion formed on a surface of the fastening attachment portion facing the pressing direction side.

3. The vehicle driving apparatus according to claim 2, wherein

the contact portion is a projecting portion having an arc-shaped cross-section, which projects to the anti-pressing direction side that is in the opposite direction to the pressing direction, and

the biasing spring is disposed to contact the projecting portion.

4. The vehicle driving apparatus according to claim 1, wherein

the contact portion is a projecting portion having an arc-shaped cross-section, which projects to the anti-pressing direction side that is in the opposite direction to the pressing direction, and

the biasing spring is disposed to contact the projecting portion.