Transmission unit for hybrid vehicle

• US 20010023790A1
• Filed: 02/20/2001
• Published: 09/27/2001
• Est. Priority Date: 03/22/2000
• Status: Active Grant

• Current Assignee: Jatco Limited (Nissan Motor Co., Ltd.)
• Original Assignee: Jatco Transtechnology Limited
• Inventors: Hasegawa, Sachiyo
• Granted Patent: US 6,513,609 B2
• Time in Patent Office: Days
• US Class Current: 180/339
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/405 Housings
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: F16H 2057/02013 Extension units for gearboxes, e.g. additional units attached to a main gear
• CPC Class Codes: F16H 2057/02034 Gearboxes combined or connected with electric machines
• CPC Class Codes: F16H 2057/02043 for vehicle transmissions
• CPC Class Codes: F16H 2057/02095 Measures for reducing number of parts or components
• CPC Class Codes: F16H 57/029 characterised by means for sealing the gearboxes, e.g. to improve airtightness
• CPC Class Codes: F16H 57/037 Gearboxes for accommodating differential gearings rotating cases for differential gearings F16H48/40
• CPC Class Codes: F16H 57/0421 on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
• CPC Class Codes: F16H 57/0489 with endless flexible members, e.g. belt CVTs
• CPC Class Codes: F16H 61/662 with endless flexible members
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/903 having energy storing means, e.g. battery, capacitor
• CPC Class Codes: Y10S 903/914 Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means
• CPC Class Codes: Y10S 903/918 Continuously variable
• CPC Class Codes: Y10S 903/952 Housing details
• CPC Class Codes: Y10T 74/2186 Gear casings

Abstract

A unit housing of a transmission unit for a hybrid vehicle is constituted by a first housing (42), a second housing (42), and a third housing (49). The first housing is provided with a first partitioning wall (46) and a third partitioning wall (70). The second housing is provided with a second partitioning wall (45) and a fourth partitioning wall (71). A first seal flange surface (72) formed on an end surface of the third partitioning wall (70) is on the same plane as an end surface of the first housing. A second seal flange surface formed on the end surface of the fourth partitioning wall is on the same plane as an end surface of the second housing. The first housing (42) and the second housing (41) are joined together by the first and second seal flange surfaces. A seal characteristic of each dry chamber against wet chambers can be assured in the unit housing with a wide space assured.

Claims

1. A hybrid vehicle comprising:

an engine;

a clutch;

a motor;

a transmission comprising an input axle that is disengageably engaged to the engine by the clutch and on which the engine, the clutch, and the motor are serially arranged and an output axle which is arranged in parallel to at least the motor; and

a unit housing of the transmission comprising at least a first housing and a second housing, the first housing comprising;

a first partitioning wall elongated in a radial direction of the transmission to define a first dry chamber and a second dry chamber, both of the first and second chambers inhibiting an entrance of a lubricating oil; and

a third partitioning wall elongated in an axial direction of the transmission to define the first and second dry chambers together with the first partitioning wall and to define a second wet chamber allowing the entrance of the lubricating oil, the second housing comprising;

a second partitioning wall elongated in the radial direction thereof to define a first wet chamber allowing the entrance of the lubricating oil; and

a fourth partitioning wall elongated in the axial direction to define the second dry chamber and the second wet chamber together with the second partitioning wall, a first seal flange surface being formed on an end surface of the third partitioning wall of the first housing and being on the same plane as an end surface of an outer periphery of the first housing, a second seal flange surface being formed on an end surface of the fourth partitioning wall and being formed on the same plane as an end surface of an outer periphery of the second housing, and the first housing being joined to the second housing by the first and second seal flange surfaces.

2. A hybrid vehicle as claimed in

claim 1

, wherein the clutch comprises an electromagnetic clutch which is housed in the first dry chamber and the motor comprises an electric motor which is housed in the second dry chamber.

3. A hybrid vehicle as claimed in

claim 1

, wherein the output axle of the transmission, an idler axle, and a differential are housed in the second wet chamber and the transmission is housed in the first wet chamber.

4. A hybrid vehicle as claimed in

claim 1

, wherein the transmission comprises a continuously variable transmission and the unit housing further comprises a third housing in which the continuously variable transmission is housed, an end surface of an outer periphery of the third housing being joined to the second housing.

5. A hybrid vehicle as claimed in

claim 1

, wherein a wall thickness portion is formed on the end surface of the fourth partitioning wall on which the second seal flange surface is formed to support the output axle of the transmission and the motor with a predetermined high rigidity.