EP0080082A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transverse type automatic transmission with intermediate power transfer through lay shaft
Assignee: Aisin AW Co Ltd
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Filing: 1982-11-02
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Granted: —
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Expires: 2002-11-02
Abstract
Abstract An automatic transmission includes a fluid torque converter and a first and a second gear transmission mechanism, each of which has two coaxial drive members-a power input member and a power output member - and is selectable to any one of several speed ratios. Rotational power is output from the fluid torque converter to the first gear transmission mechanism. The torque converter, and the first gear transmission mechanism including the power input and power output members thereof, are all coaxial on a first axis. A through lay shaft extends along a second axis parallel to the first axis, passing through the second gear transmission mechanism so as to support it, and is rotationally coupled to the power input member of the second gear transmission mechanism. A gear wheel rotationally coupled to the power output member of the first gear transmission mechanism transfers rotational power to a gear wheel meshed with it and fixed to the through lay shaft, which transfers this rotational power to the power input member of the second gear transmission mechanism. A power output gear wheel is rotatably supported by the through lay shaft and is rotationally coupled to the power output member of the second gear transmission mechanism.
Inventors
- 👤 Kubo Seitoku
- 👤 Morisawa Kunio
- 👤 Miura Masakatsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 14:17
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/02; F16H57/028; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H57/037; F16H2057/02039; F16H2057/02043; F16H2057/02047; F16H2057/02086; F16H2057/02091; F16H57/023; F16H2057/0235; F16H2200/00; F16H2200/0008; F16H2200/20; F16H2200/2002; F16H2200/201
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
318 words
An automatic transmission for an automotive vehicle, comprising: (a) a fluid torque converter, comprising a rotational power input member and a rotational power output member, said rotational power input member and said rotational power output member both being rotatable about a first axial line; (b) a first gear transmission mechanism, comprising a rotational power input member and a rotational power output member, which can be selectively controlled to produce any one of a plurality of speed ratios between said rotational power input member and said rotational power output member, said rotational power input member and said rotational power output member both being rotatable about said first axial line; said rotational power input member of said first gear transmission mechanism being rotationally connected to said rotational power output member of said fluid torque converter; (e) a second gear transmission mechanism, comprising a rotational power input member and a rotational power output member, which can be selectively controlled to produce any one of a plurality of speed ratios between said rotational power input member and said rotational power output member, said rotational power input member and said rotational power output member both being rotatable about a second axial line parallel to said first axial line and displaced laterally therefrom; (d) a through lay shaft which extends along and is rotatable about said second axial line, which is rotationally coupled to said rotational power input member of said second gear transmission mechanism, and which passes through said second gear transmission mechanism; (e) a rotational power transfer mechanism, which transfers rotational power from said rotational power output member of said first gear transmission mechanism to said through lay shaft; and (f) a power output gear wheel which is supported by said lay shaft so as to be rotatable thereon about said second axial line and which is drivingly rotationally connected with said rotational power output member of said second gear transmission mechanism.
Claim 2
Dependent Claim
318 words
An automatic transmission for an automotive vehicle, comprising: (a) a fluid torque converter, comprising a rotational power input member and a rotational power output member, said rotational power input member and said rotational power output member both being rotatable about a first axial line; (b) a first gear transmission mechanism, comprising a rotational power input member and a rotational power output member, which can be selectively controlled to produce any one of a plurality of speed ratios between said rotational power input member and said rotational power output member, said rotational power input member and said rotational power output member both being rotatable about said first axial line; said rotational power input member of said first gear transmission mechanism being rotationally connected to said rotational power output member of said fluid torque converter; (e) a second gear transmission mechanism, comprising a rotational power input member and a rotational power output member, which can be selectively controlled to produce any one of a plurality of speed ratios between said rotational power input member and said rotational power output member, said rotational power input member and said rotational power output member both being rotatable about a second axial line parallel to said first axial line and displaced laterally therefrom; (d) a through lay shaft which extends along and is rotatable about said second axial line, which is rotationally coupled to said rotational power input member of said second gear transmission mechanism, and which passes through said second gear transmission mechanism; (e) a rotational power transfer mechanism, which transfers rotational power from said rotational power output member of said first gear transmission mechanism to said through lay shaft; and (f) a power output gear wheel which is supported by said lay shaft so as to be rotatable thereon about said second axial line and which is drivingly rotationally connected with said rotational power output member of said second gear transmission mechanism.
Claim 3
Dependent Claim
61 words
An automatic transmission for an automotive vehicle according to claim 1, wherein said rotational power transfer mechanism comprises a first gear wheel which is rotationally coupled to said rotational power output member of said first gear transmission mechanism and a second gear wheel which is fixedly mounted on said through lay shaft and which is meshed with said first gear wheel.
Claim 4
Dependent Claim
131 words
An automatic transmission for an automotive vehicle according to claim 4, wherein said second gear transmission mechanism comprises a planetary gear mechanism including a sun gear, a ring gear, a plurality of planetary pinions, a carrier, a clutch for selectively rotationally coupling said carrier to said sun gear, and a brake for selectively preventing saidsun gear from rotating, said ring gear being rotationally connected with said through lay shaft, while said carrier is rotationally connected with said power output gear wheel, the connection between said ring gear and said through lay shaft and the connection between said carrier and said power output gear shaft being positioned on the same axial side of said second gear transmission mechanism opposite to the other axial side thereof where said second gear wheel is positioned.
Claim 5
Dependent Claim
39 words
An automatic transmission for an automotive vehicle according to claim 3, wherein said clutch and said brake are positioned between the meshing assembly of said sun gear, said ring gear, and said planetary pinions and said second gear wheel.
Claim 6
Dependent Claim
79 words
An automatic transmission for an automotive vehicle according to claim 3, wherein said first gear wheel is constructed as a helically cut gear having a certain handedness, said second gear wheel is constructed as a helically cut gear wheel having the opposite handedness to said certain handedness, and said power output gear wheel is constructed as a helically cut gear wheel having said certain handedness and is axially coupled to said through lay shaft in a force transmitting relationship.
Claim 7
Dependent Claim
205 words
An automatic transmission for an automotive vehicle according to claim 5, wherein said sun gear is constructed as a helically cut gear having said certain handedness, said planetary pinions are constructed as helically cut gear wheels having the opposite handedness to said certain handedness, and said ring gear is constructed as a helically cut gear having the opposite handedness to said certain handedness, and further comprising a bearing means for sustaining axial force between said sun gear and said ring gear while allowing relative rotational motion therebetween when said sun gear is urged in the direction towards said power output gear wheel relative to said ring gear and said ring gear is urged in the direction towards said second gear wheel relative to said sun gear, a bearng means for preventing said sun gear from moving in the axial direction towards said second gear wheel while allowing relative rotational motion therebetween when said sun gear is urged in the axial direction towards said second gear wheel, and a means for sustaining axial force between said ring gear and said power output gear wheel while allowing relative rotational motion therebetween when said ring gear is urged in the axial direction towards said power output gear wheel.
Claim 8
Dependent Claim
32 words
An automatic transmission for an automotive vehicle according to either one of claims 5 and 6, wherein said through lay shaft is rotationally supported without the use of any thrust bearing structure.
References Cited (Backward Citations)
No citation records indexed.
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