EP0075271A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transverse type automatic transmission with through lay shaft
Assignee: Toyota Motor Corp
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Filing: 1982-09-15
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Granted: —
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Expires: 2002-09-15
Abstract
Abstract An automatic transmission includes a fluid torque converter (3) and a first (12) and a second (13) 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 (3) to the first gear transmission mechanism (12). The torque converter (3) and the first gear transmission mechanism (12) including the power Input (14) and output (40) members thereof, are all coaxial on a first axis. A through lay shaft (71) extends along a second axis parallel to the first axis, and passes through the second gear transmission mechanism (13), whose power input (70) and output (45) members are also coaxial on the second axis, so as to support these. A rotational power transfer mechanism (53. 54) transfers rotational power between the power output member (40) of the first gear transmission mechanism (12) and the pcwer input member (70) of the second gear transmission mechanism (13).
Inventors
- 👤 Morisawa Kunio
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 10:00
CPC Classifications
F; F16; F16H; F16H37/00; F16H37/02; F16H37/04; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H61/00; F16H61/70; F16H61/705; F16H2200/00; F16H2200/0008; F16H2306/00; F16H2306/20; F16H2306/40; F16H2306/44; F16H2306/52; F16H61/68; F16H61/684; F16H61/686
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
305 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, and which passes through said second gear transmission mechanism; (e) a rotational power transfer mechanism which transfers rotational power between said rotational power output member of said first gear transmission mechanism and said rotational power input member of said second gear transmission mechanism; and (f) a power output gear wheel which is supported by said lay shaft to be rotatable about said second axial line and which is drivingly connected with said rotational power output member of said second gear transmission mechanism.
Claim 2
Dependent Claim
305 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, and which passes through said second gear transmission mechanism; (e) a rotational power transfer mechanism which transfers rotational power between said rotational power output member of said first gear transmission mechanism and said rotational power input member of said second gear transmission mechanism; and (f) a power output gear wheel which is supported by said lay shaft to be rotatable about said second axial line and which is drivingly connected with said rotational power output member of said second gear transmission mechanism.
Claim 3
Dependent Claim
95 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 rotatable about said first axial line and which is rotationally connected to said rotational power output member of said first gear transmission mechanism and a second gear wheel which is meshed with said first gear wheel and which is supported by said lay shaft so as to be rotatable about said second axial line and which is rotationally connected to said rotational power input member of said second gear transmission mechanism.
Claim 4
Dependent Claim
36 words
An automatic transmission for an automotive vehicle according to claim 1, wherein said first gear transmission mechanism and said second gear transmission mechanism are underdrive mechanisms, and said rotational power transfer mechanism is an overdrive mechanism.
Claim 5
Dependent Claim
43 words
An automatic transmission for an automotive vehicle according to claim 1, wherein said power output gear wheel is rotationally fixed to said lay shaft, and said rotational power output member of said second gear transmission mechanism is rotationally connected to said lay shaft.
Claim 6
Dependent Claim
73 words
An automatic transmission for an automotive vehicle according to claim 1, wherein said second gear transmission mechanism comprises a planetary gear mechanism including a sun gear, a ring gear, a plurality of planetary pinions, and a carrier, said ring gear being rotationally connected with said rotational power input member of sais second gear transmission mechanism, while said carrier is rotationally connected with said rotational power output member of said second gear transmission mechanism.
Claim 7
Dependent Claim
52 words
An automatic transmission for an automotive vehicle according to claim 1, wherein said rotational power input member of said second gear transmission mechanism is a hollow member through which said lay shaft passes, while said rotational power output member of said second gear transmission mechanism includes a part of said lay shaft.
Claim 8
Dependent Claim
27 words
An automatic transmission for an automotive vehicle according to claim 2, wherein said second gear wheel has a smaller number of teeth than said first gear wheel.
References Cited (Backward Citations)
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