Aisin Seiki Kabushiki Kaisha

Koichi Matsuo

Noboru Murakami

Kazuo Ohara

Koichiro Hirosawa

Koichiro Hirozawa

Kazuo Obara

Speed change gears of the planetary gear type suited for applications within fluid couplings used upon automotive vehicles includes an input shaft, a first clutch for releasing or coupling a second ring gear and a third sun gear simultaneously from or to the input shaft, a second clutch for releasing or coupling a first sun gear and a second sun gear simultaneously from or to the input shaft, a first planetary gear engaged with the first sun gear, a first ring gear engaging the first planetary gear, a first carrier rotatably supporting the first planetary gear, a second planetary gear engaged with the second sun gear and the second ring gear, a second carrier rotatably supporting the second planetary gear, a third planetary gear enmeshed with the third sun gear, a third ring gear interengaged with the third planetary gear and coupled to the first ring gear, a third carrier rotatably supporting the third planetary gear and coupled to the second carrier and to an output shaft, a first brake capable of locking the first sun gear and the second sun gear simultaneously to a casing, a second brake capable of locking the first carrier relative to the casing, and a third brake capable of locking the first ring gear and the third gear simultaneously to the casing.

Speed change gear

A speed change gear system for providing at least four forward drive speed ranges and one reverse drive speed range includes three planetary gear sets of the single-pinion type, three clutches, and two brakes. As a result of the coupling and uncoupling of the clutches and brakes, the movable elements of each of the planetary gear sets are suitably coupled so as to attain the various speed ranges.

Speed change gear system

A speed change gear system of the planetary type suited for applications to fluid couplings utilized upon automotive vehicles includes at least first, second, and third planetary gear sets suitably interposed between an input shaft and an output shaft, first and second clutches, and first, second, and third braking means. The first planetary gear set may include a first sun gear, a first planetary gear engaged therewith, a second planetary gear engaged with the first planetary gear, a first ring gear enmeshed with the second planetary gear, and a first carrier rotatably supporting the first and second planetary gears, while the second planetary gear set may include a second sun gear drivingly coupled to the first carrier, a third planetary gear engaged with the second sun gear, a second ring enmeshed with the third planetary gear, and a second carrier rotatably supporting the third planetary gear, and the third planetary gear set may include a third sun gear drivingly coupled to the first sun gear and the second ring gear, a fourth planetary gear interengaged with the third sun gear, a third ring gear enmeshed with the fourth planetary gear, and a third carrier rotatably supporting the fourth planetary gear and drivingly coupled to the second carrier and to the output shaft. The first clutch couples or uncouples the input shaft to or from the first sun gear, the second ring gear and the third sun gear, while the second clutch couples or uncouples the input shaft to or from the first carrier and the second sun gear. The first brake is capable of locking the first carrier and the second sun gear to the gear casing while the second brake is capable of locking the first ring gear to the casing and the third brake is capable of locking the third ring gear to the casing.

A speed change gear system for providing at least four forward drive speed ranges and one reverse drive speed range includes planetary gear sets of the single-pinion type and simple planetary gear sets of the double-pinion type as well as a plurality of clutches and brakes. As a result of the coupling and uncoupling of the clutches and brakes, the movable elements of the gear sets are suitably coupled so as to attain the various speed ranges.

A speed change gear system of the planetary gear type suited for applications within fluid couplings used upon automobiles includes three simple planetary gear sets of the single pinion type and the double pinion type, three clutch units, and at least two brake units. The movable members of the three planetary gear sets are suitably coupled to each other, and the brake units are suitably locked and unlocked so as to attain the desired speed ranges, that is, at least four forward drive speeds and at least one reverse drive speed.

A speed change gear system of the planetary gear type suited for applications within fluid couplings used upon automobiles includes three simple planetary gear sets of the single pinion type and the double pinion type, two clutch units, and three brake units. The movable members of the three planetary gear sets are suitably coupled to each other, and the brake units are suitably locked and unlocked so as to attain the desired speed ranges, that is, at least four forward drive speeds and at least one reverse drive speed.

Power transmission for motor vehicles including an input and an output shafts rotatable about a common axis, a planetary gear mechanism including interconnected three planetary gear sets, clutch means for selectively connecting elements of the gear mechanism with the input shaft, an element of the final stage gear set of the planetary gear mechanism being connected with the output shaft, brake means being provided for selectively constraining elements of the gear mechanism against rotation. A further set of planetary gear may be additionally combined with the planetary gear mechanism.

Power transmission for motor vehicles

A speed change gear system for providing at least four forward drive speed ranges and one reverse drive speed range includes two planetary gear sets of the single-pinion type and one planetary gear set of the double-pinion type, two clutches, and three brakes. As a result of the coupling and uncoupling of the clutches and brakes, the movable elements of each of the planetary gear sets are suitably coupled so as to attain the various speed ranges.

A speed change gear system includes an input shaft, an output shaft and three planetary gear sets interposed therebetween. The first planetary gear set includes a first sun gear, a first planetary gear intermeshed with the first sun gear, a first ring gear enmeshed with the first planetary gear, and a first carrier rotatably supporting the first planetary gear while the second planetary gear set includes a second sun gear, a second planetary gear enmeshed with the second sun gear, a second ring gear intermeshed with the second planetary gear and drivingly connected to the first carrier, and a second carrier rotatably supporting the second planetary gear. The third planetary gear set similarly includes a third sun gear drivingly connected to the second sun gear, a third planetary gear interengaged with the third sun gear, a third ring gear enmeshed with the third planetary gear and drivingly connected to the second carrier and the first ring gear, and a third carrier rotatably supporting the third planetary gear and drivingly connected to the output shaft. A first clutch is provided for engaging or disengaging the input shaft with the first ring gear, the second carrier, and the third ring gear, and a second clutch is similarly provided for engaging or disengaging the input shaft with the first carrier and the second ring gear while a third clutch is additionally provided for engaging or disengaging the input shaft with the first sun gear. A first brake is also provided for fixedly securing the first sun gear relative to the gear casing while a second brake is similarly provided for fixedly securing the first ring gear, the second carrier, and the third ring gear to the casing, and a third brake is also provided for fixedly securing the second and third sun gears to the casing.

A speed change gear system of the planetary gear type suited for applications within fluid couplings used upon automotive vehicles includes an input shaft and a first planetary gear set which includes a first sun gear, a first planetary gear engaged with the first sun gear, a first ring gear engaged with the first planetary gear, and a first carrier rotatably supporting the first planetary gear. A second planetary gear set similarly includes a second ring gear drivingly connected to the first carrier, a second planetary gear engaged with the second ring gear, a second sun gear engaged with the second planetary gear, and a second carrier rotatably supporting the second planetary gear, while a third planetary gear set likewise includes a third sun gear drivingly connected to the second sun gear, a third planetary gear engaged with the third sun gear, a third ring gear engaged with the third planetary gear and drivingly connected to the first ring gear and the second carrier, and a third carrier rotatably supporting the third planetary gear. A first clutch is provided for simultaneously coupling or uncoupling the second and third sun gears to or from the input shaft while a second clutch is also provided for simultaneously coupling or uncoupling the second carrier and the first and third ring gears to or from the input shaft, and a third clutch is likewise provided for coupling or uncoupling the first sun gear to or from the input shaft. A first brake is also provided within the system and is capable of being actuated for locking the first sun gear to the gear casing, while a second brake is likewise provided and is capable of being actuated for simultaneously locking the first carrier and the second ring gear to the casing and a third brake is similarly capable of being actuated for simultaneously locking the first and third ring gears and the second carrier to the casing. The output shaft is dynamically connected to the third carrier as one integral unit.

Speed change gears of the planetary gear type suited for applications within fluid couplings used upon automotive vehicles includes an input shaft, a first clutch for releasing or coupling a second ring gear and a third sun gear simultaneously from or to the input shaft, a second clutch for releasing or coupling a first sun gear and a second sun gear simultaneously from or to the input shaft, a first planetary gear engaged with the first sun gear, a first ring gear engaging the first planetary gear, a first carrier rotatably supporting the first planetary gear, a second planetary gear engaged with the second sun gear and the second ring gear, a second carrier rotatably supporting the second planetary gear, a third planetary gear enmeshed with the third sun gear, a third ring gear interengaged with the third planetary gear and coupled to the first ring gear, a third carrier rotatably supporting the third planetary gear and coupled to the second carrier and to an output shaft, a first brake capable of locking the first sun gear and the second sun gear simultaneously to a casing, a second brake capable of locking the first carrier relative to the casing, and a third brake capable of locking the first ring gear and the third ring gear simultaneously to the casing.

A speed change gear system of the planetary type suited for applications to fluid couplings utilized upon automotive vehicles includes at least first, second, and third planetary gear sets suitably interposed between an input shaft and an output shaft, first and second clutches, and first, second, and third braking means. The first planetary gear set may include a first sun gear, a first planetary gear engaged therewith, a second planetary gear engaged with the first planetary gear, a first ring gear enmeshed with the second planetary gear, and a first carrier rotatably supporting the first and second planetary gears, while the second planetary gear set may include a second sun gear drivingly coupled to the first carrier, a third planetary gear engaged with the second sun gear, a second ring gear enmeshed with the third planetary gear, and a second carrier rotatably supporting the third planetary gear, and the third planetary gear set may include a third sun gear drivingly coupled to the first sun gear and the second ring gear, a fourth planetary gear interengaged with the third sun gear, a third ring gear enmeshed with the fourth planetary gear, and a third carrier rotatably supporting the fourth planetary gear and drivingly coupled to the second carrier and to the output shaft. The first clutch couples or uncouples the input shaft to or from the first sun gear, the second ring gear and the third sun gear, while the second clutch couples or uncouples the input shaft to or from the first carrier and the second sun gear. The first brake is capable of locking the first carrier and the second sun gear to the gear casing while the second brake is capable of locking the first ring gear to the casing and the third brake is capable of locking the third ring gear to the casing.

Growing community of inventors

Toyota, Japan

Koichi Matsuo