US 7,101,305 B2 · Planetary-gear-type multiple-step transmission for vehicle · patentgrep

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Abstract

A planetary-gear-type multiple-step transmission including a stationary member, an input rotary member, an output rotary member, and first and second transmission units. The first transmission unit transmits a rotary motion from an input rotary member to the second transmission unit through first and second intermediate transmitting paths such that a speed of the rotary motion transmitted through the second intermediate transmitting path is lower than that of the rotary motion transmitted through the first intermediate transmitting path. The second transmission unit constitutes first, second, third, fourth and fifth rotary elements, each of which is provided by at least one of sun gears, carriers and ring gears of three planetary gear sets. The first rotary element is selectively connected to the second intermediate transmitting path, while being selectively connected to the stationary member. The second rotary element is selectively connected to the first intermediate transmitting path. The third rotary element is selectively connected to the first intermediate transmitting path, while being selectively connected to the stationary member. The fourth rotary element is connected to the output rotary member. The fifth rotary element is selectively connected to the second intermediate transmitting path.

Claims45

Dependent claims

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets each having a sun gear, a carrier and a ring gear, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second transmission unit constitutes first, second, third, fourth and fifth rotary elements, each of which is provided by at least one of the sun gears, carriers and ring gears of said three planetary gear sets,
wherein said first rotary element is selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said second rotary element is selectively connected to said first intermediate transmitting path through said third clutch,
wherein said third rotary element is selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said fourth rotary element is connected to said output rotary member,
wherein said fifth rotary element is selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

12 more elements

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets consisting of second, third and fourth planetary gear sets which are disposed coaxially with each other, such that said third planetary gear set is disposed between said second and fourth planetary gear sets, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second planetary gear set is a double-pinion type planetary gear set, and includes a second sun gear, a second carrier, a second ring gear and at least one pair of planetary gears which are rotatably held by said second carrier and which mesh with each other,
wherein said third planetary gear set is a single-pinion type planetary gear set, and includes a third sun gear, a third carrier and a third ring gear,
wherein said fourth planetary gear set is a single-pinion type planetary gear set, and includes a fourth sun gear, a fourth carrier and a fourth ring gear,
wherein said second sun gear and said fourth sun gear are selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said third ring gear is selectively connected to said first intermediate transmitting path through said third clutch,
wherein said second ring gear, said third carrier and said fourth carrier are selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said third sun gear and said fourth ring gear are connected to said output rotary member,
wherein said second carrier is selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

14 more elements

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets consisting of second, third and fourth planetary gear sets which are disposed coaxially with each other, such that said third planetary gear set is disposed between said second and fourth planetary gear sets, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second planetary gear set is a double-pinion type planetary gear set, and includes a second sun gear, a second carrier, a second ring gear and at least one pair of planetary gears which are rotatably held by said second carrier and which mesh with each other,
wherein said third planetary gear set is a single-pinion type planetary gear set, and includes a third sun gear, a third carrier and a third ring gear,
wherein said fourth planetary gear set is a single-pinion type planetary gear set, and includes a fourth sun gear, a fourth carrier and a fourth ring gear,
wherein said second carrier and said fourth sun gear are selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said third ring gear is selectively connected to said first intermediate transmitting path through said third clutch,
wherein said second ring gear, said third carrier and said fourth carrier are selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said third sun gear and said fourth ring gear are connected to said output rotary member,
wherein said second sun gear is selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

14 more elements

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets consisting of second, third and fourth planetary gear sets which are disposed coaxially with each other, such that said third planetary gear set is disposed between said second and fourth planetary gear sets, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second planetary gear set is a single-pinion type planetary gear set, and includes a second sun gear, a second carrier and a second ring gear,
wherein said third planetary gear set is a double-pinion type planetary gear set, and includes a third sun gear, a third carrier, a third ring gear and at least one pair of planetary gears which are rotatably held by said second carrier and which mesh with each other,
wherein said fourth planetary gear set is a single-pinion type planetary gear set, and includes a fourth sun gear, a fourth carrier and a fourth ring gear,
wherein said second sun gear and said third sun gear are selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said fourth ring gear is selectively connected to said first intermediate transmitting path through said third clutch,
wherein said third ring gear and said fourth carrier are selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said second carrier, said third carrier and said fourth sun gear are connected to said output rotary member,
wherein said second ring gear is selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

14 more elements

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets consisting of second, third and fourth planetary gear sets which are disposed coaxially with each other, such that said third planetary gear set is disposed between said second and fourth planetary gear sets, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second planetary gear set is a single-pinion type planetary gear set, and includes a second sun gear, a second carrier and a second ring gear,
wherein said third planetary gear set is a double-pinion type planetary gear set, and includes a third sun gear, a third carrier, a third ring gear and at least one pair of planetary gears which are rotatably held by said second carrier and which mesh with each other,
wherein said fourth planetary gear set is a single-pinion type planetary gear set, and includes a fourth sun gear, a fourth carrier and a fourth ring gear,
wherein said third sun gear and said fourth sun gear are selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said second ring gear is selectively connected to said first intermediate transmitting path through said third clutch,
wherein said second carrier is selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said second sun gear, said third ring gear and said fourth carrier are connected to said output rotary member,
wherein said third carrier and said fourth ring gear are selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

14 more elements

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets consisting of second, third and fourth planetary gear sets which are disposed coaxially with each other, such that said third planetary gear set is disposed between said second and fourth planetary gear sets, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second planetary gear set is a single-pinion type planetary gear set, and includes a second sun gear, a second carrier and a second ring gear,
wherein said third planetary gear set is a single-pinion type planetary gear set, and includes a third sun gear, a third carrier and a third ring gear,
wherein said fourth planetary gear set is a single-pinion type planetary gear set, and includes a fourth sun gear, a fourth carrier and a fourth ring gear,
wherein said third sun gear and said fourth sun gear are selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said second ring gear is selectively connected to said first intermediate transmitting path through said third clutch,
wherein said second carrier and said third carrier are selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said second sun gear, said third ring gear and said fourth carrier are connected to said output rotary member,
wherein said fourth ring gear is selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

14 more elements

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets consisting of second, third and fourth planetary gear sets which are disposed coaxially with each other, such that said third planetary gear set is disposed between said second and fourth planetary gear sets, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second planetary gear set is a single-pinion type planetary gear set, and includes a second sun gear, a second carrier and a second ring gear,
wherein said third planetary gear set is a double-pinion type planetary gear set, and includes a third sun gear, a third carrier, a third ring gear and at least one pair of planetary gears which are rotatably held by said second carrier and which mesh with each other,
wherein said fourth planetary gear set is a single-pinion type planetary gear set, and includes a fourth sun gear, a fourth carrier and a fourth ring gear,
wherein said fourth sun gear is selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said second ring gear and said third sun gear are selectively connected to said first intermediate transmitting path through said third clutch,
wherein said second carrier is selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said second sun gear, said third ring gear and said fourth carrier are connected to said output rotary member,
wherein said third carrier and said fourth ring gear are selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

14 more elements

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets consisting of second, third and fourth planetary gear sets which are disposed coaxially with each other, such that said third planetary gear set is disposed between said second and fourth planetary gear sets, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second planetary gear set is a single-pinion type planetary gear set, and includes a second sun gear, a second carrier and a second ring gear,
wherein said third planetary gear set is a double-pinion type planetary gear set, and includes a third sun gear, a third carrier, a third ring gear and at least one pair of planetary gears which are rotatably held by said second carrier and which mesh with each other,
wherein said fourth planetary gear set is a single-pinion type planetary gear set, and includes a fourth sun gear, a fourth carrier and a fourth ring gear,
wherein said fourth sun gear is selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said second ring gear is selectively connected to said first intermediate transmitting path through said third clutch,
wherein said second carrier and said third sun gear are selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said second sun gear, said third ring gear and said fourth carrier are connected to said output rotary member,
wherein said third carrier and said fourth ring gear are selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

14 more elements

A planetary-gear-type multiple-step transmission for a vehicle, having a plurality of drive positions which are selectively established, said transmission comprising:

a stationary member;
an input rotary member;
an output rotary member;
a first transmission unit which is connected to said input rotary member;
and
a second transmission unit which is connected to said output rotary member,
wherein said first transmission unit is capable of transmitting a rotary motion from said input rotary member to said second transmission unit through first and second intermediate transmitting paths such that a speed of said rotary motion transmitted through said second intermediate transmitting path is lower than a speed of said rotary motion transmitted through said first intermediate transmitting path,
wherein said second transmission unit includes three planetary gear sets consisting of second, third and fourth planetary gear sets which are disposed coaxially with each other, such that said third planetary gear set is disposed between said second and fourth planetary gear sets, said second transmission unit further including first and second brakes, and first, second, third and fourth clutches,
wherein said second planetary gear set is a double-pinion type planetary gear set, and includes a second sun gear, a second carrier, a second ring gear and at least one pair of planetary gears which are rotatably held by said second carrier and which mesh with each other,
wherein said third planetary gear set is a single-pinion type planetary gear set, and includes a third sun gear, a third carrier and a third ring gear,
wherein said fourth planetary gear set is a single-pinion type planetary gear set, and includes a fourth sun gear, a fourth carrier and a fourth ring gear,
wherein said fourth sun gear is selectively connected to said second intermediate transmitting path through said second clutch, while being selectively connected to said stationary member through said first brake,
wherein said second carrier and said third ring gear are selectively connected to said first intermediate transmitting path through said third clutch,
wherein said third carrier is selectively connected to said first intermediate transmitting path through said fourth clutch, while being selectively connected to said stationary member through said second brake,
wherein said second ring gear, said third sun gear and said fourth carrier are connected to said output rotary member,
wherein said second sun gear and said fourth ring gear are selectively connected to said second intermediate transmitting path through said first clutch,
and wherein said plurality of drive positions are established by selectively engaging and releasing said brakes and said clutches.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/845,151Filed 14 May 2004
Priority: JP 2003-14992627 May 2003
Published: US 2004/0242368 A12 Dec 2004
Granted: 5 Sep 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

Family

US 2004/0242368 A1Pre-grant publication · published 2 Dec 2004
US 7,101,305 B2This patent

From the US filing history. Foreign family members aren’t listed.

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