JPS628669B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to automatic transmissions, and particularly to front engine/front drive (F-F) automatic transmissions.
system or rear engine/rear drive (R-
The present invention relates to an automatic transmission with an overdrive that is applied to an automobile of the R) type. An object of the present invention is to provide an automatic transmission with an overdrive that is suitable for F-F type or R-R type automobiles and is suitable for improving the fuel consumption rate of the engine. a torque converter coaxially connected to the output shaft of the engine, a first output shaft connected to the torque converter, and a second output shaft disposed parallel to the first output shaft.
an overdrive device connected to the output shaft of the engine or the first output shaft, and a transmission gear device connected to the first output shaft for achieving a plurality of gears. In the transmission, the overdrive device includes an overdrive drive gear coaxially connected to the first output shaft or the output shaft of the engine, and an overdrive drive gear meshed with the overdrive drive gear and connected to the second output shaft. The transmission gear device includes an overdrive driven gear disposed concentrically with the second output shaft, and a first clutch that detachably connects the overdrive drive gear to the second output shaft. a first intermediate shaft disposed coaxially with the first intermediate shaft; a second intermediate shaft coaxially disposed with the first intermediate shaft; and a second intermediate shaft connected to the first intermediate shaft. a second drive gear connected to the second intermediate shaft;
the first output shaft, the first intermediate shaft and the second
a third intermediate shaft disposed coaxially with the second output shaft; and a third intermediate shaft coaxially disposed with the second output shaft; a fourth intermediate shaft disposed in the second intermediate shaft; a first driven gear meshing with the first drive gear and connected to the third intermediate shaft; a second driven gear connected to a fourth intermediate shaft; and first and second planetary gear mechanisms disposed concentrically on the fourth intermediate shaft, the first planetary gear mechanism 3rd ring gear
The sun gears of the first and second planetary gear mechanisms are connected to a fourth intermediate shaft, and the first
a carrier of a planetary gear mechanism and a ring gear of a second planetary gear mechanism are connected to the second output shaft,
a first brake that fixes the carrier of the second planetary gear mechanism, and a second brake that fixes the sun gears of the first and second planetary gear mechanisms to the second intermediate shaft; The second and third clutches and the second brake are provided concentrically on the first output shaft. Furthermore, the present invention
a torque converter coaxially connected to the output shaft of the engine, a first output shaft connected to the torque converter, and a second output shaft disposed parallel to the first output shaft; An automatic transmission comprising: an overdrive device connected to the output shaft of the engine or the first output shaft; and a speed change gear device connected to the first output shaft for achieving a plurality of gears. The overdrive device includes an overdrive drive gear disposed concentrically with the first output shaft or the output shaft of the engine, and an overdrive drive gear meshed with the overdrive drive gear and coaxially disposed with the second output shaft. The connected overdrive driven gear and the overdrive drive gear are connected to the first
or a first clutch removably connected to the output shaft of the engine or the output shaft of the engine, and the transmission gear device includes a first intermediate shaft disposed coaxially with the first output shaft; a second intermediate shaft disposed concentrically with the first intermediate shaft; a first drive gear connected to the first intermediate shaft; and a second intermediate shaft connected to the second intermediate shaft. a drive gear, second and third clutches that are releasably connected to the first output shaft, the first intermediate shaft, and the second intermediate shaft, respectively; and coaxially connected to the second output shaft. a third intermediate shaft disposed, a fourth intermediate shaft disposed concentrically with the third intermediate shaft, meshing with the first driving gear and connected to the third intermediate shaft; The first to be
a second driven gear that meshes with the second driving gear and is connected to the fourth intermediate shaft, and first and second driven gears that are disposed concentrically on the fourth intermediate shaft. 2 planetary gear mechanisms, the ring gear of the first planetary gear mechanism is connected to a third intermediate shaft, and the sun gears of the first and second planetary gear mechanisms are connected to a fourth intermediate shaft, a first brake that connects the carrier of the first planetary gear mechanism and the ring gear of the second planetary gear mechanism to the second output shaft and fixes the carrier of the second planetary gear mechanism; a second brake for fixing the sun gears of the first and second planetary gear mechanisms to the second intermediate shaft; and the second and third clutches and the second brake are connected to the first output shaft. The structure is arranged concentrically. Next, one embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the automatic transmission of the present invention is coaxially connected to an output shaft 1 of an engine, a torque converter 20, an output shaft 2 of the torque converter 20, a speed change gear device 30, an overdrive device 40, and an output shaft 3. The overdrive device 40 is disposed between the torque converter 20 and the speed change gear device 30, and the speed change gear device 30 is configured with two shafts. The torque converter 20 includes a pump impeller 21,
The pump impeller 21 is connected to the output shaft 1 of the engine, and the turbine runner 22 is connected to the output shaft 2 of the torque converter 20. The variable speed gear device 30 includes the output shaft 2, output shaft 3, intermediate shafts 4, 5, 6, 7, clutches 10, 11, brakes 12, 13, one-way clutch 14, planetary gear mechanisms 60, 70, and drive gears of the torque converter. 3
1 and 32, and driven gears 33 and 34. The planetary gear mechanisms 60 and 70 each have a sun gear 6
1, 71, planetary pinions 62, 72, ring gears 63, 73, and carriers 64, 74. The output shaft 2 of the torque converter is connected to an intermediate shaft 4 via a clutch 10, and
It is connected to the intermediate shaft 5 via a clutch 11. Drive gears 31 and 32 are coaxially connected to the intermediate shafts 4 and 5, respectively. Also, the intermediate shaft 5 has a brake 12
It is equipped with The driving gears 31 and 32 are connected in a meshing relationship with driven gears 33 and 34, which are coaxially connected to intermediate shafts 6 and 7, which are arranged parallel to the intermediate shafts 4 and 5, respectively. The shaft 6 in the middle is a planetary gear mechanism 60
The intermediate shaft 7 is connected to sun gears 61, 71 of planetary gear mechanisms 60, 70. The carrier 74 of the planetary gear mechanism 70 is equipped with a brake 13 and a one-way clutch 14. A carrier 64 of the planetary gear mechanism 60 and a ring gear 73 of the planetary gear mechanism 70 are connected to the output shaft 3. Further, an output gear 50 is coaxially connected to the output shaft 3. The overdrive device 40 includes an overdrive drive gear 41 coaxially connected to the output shaft 2 of the torque converter, and an overdrive driven gear coaxially connected to the output shaft 3 of the transmission gear device 30 via a clutch 15. The overdrive drive gear 41 and the overdrive driven gear 42 are connected in a meshing relationship. Further, each of the shafts 1, 2, 3, 4, 5, 6, and 7 is supported by a gear case 90, respectively. The pump impeller 21 of the torque converter 20 is an oil pump 80
is driving. Table 1 summarizes the operations of the clutches 10, 11, 15, brakes 12, 13, and one-way clutch 14 at each gear stage of the automatic transmission of the present invention constructed as described above.

[Table] In Table 1, the circle mark indicates that the machine is operating by a hydraulic oil operating mechanism. The symbol △ indicates that the engine brake is being operated by the pressurized oil operating mechanism when necessary. The * mark indicates that the one-way clutch is locked only when the engine is driving. Next, the operation of each gear stage will be explained. First forward speed: clutch 10 and one-way clutch 14 are operating. The power from the output shaft 1 of the engine is transferred to the output shaft 2 via the torque converter 20.
can be conveyed to. The rotation of the output shaft 2 is transmitted via the clutch 10 to a driving gear 31 connected to the intermediate shaft 4, and via a driven gear 33 to the intermediate shaft 6 of the transmission gear unit 30. Rotation from intermediate shaft 6 is transmitted to ring gear 63. At this time, carrier 7
4 is transmitted with rotation in the direction opposite to that of the intermediate shaft 6, but since its rotation is restrained by the one-way clutch 14, the ring gear 73 rotates in the same direction as the intermediate shaft 6, thereby rotating the output shaft 3. At the same time, the carrier 64 also rotates in the same direction to rotate the output shaft 3, and the combined rotational force is transmitted to the output shaft 3. Note that when you want to apply engine braking, such as when driving downhill, the one-way clutch 14 alone will allow the carrier 74 to rotate in the same direction, so the brake 13 is activated to allow the carrier 74 to rotate in the same direction. Therefore, the brake 13 is activated to restrain the rotation of the carrier 74. Second forward speed...The rotation from the output shaft 1 of the engine is transferred to the transmission gear device 3 in the same way as in the case of the first forward speed.
0 is transmitted to the intermediate shaft 6. Rotation from intermediate shaft 6 is transmitted to ring gear 63. At this time, since the sun gear 61 is fixed by the brake 12, the planetary pinion 62 is caused to revolve in the same direction as the intermediate shaft 6 along the sun gear 61 by the ring gear 3, and as a result, the carrier 64 rotates in the same direction. It is transmitted to the output shaft 3. Third forward speed...The rotation from the output shaft 1 of the engine is transmitted to the output shaft 2 of the torque converter. Since the clutches 10 and 11 are operating, the rotation from the output shaft 2 is transmitted to the intermediate shafts 4, 5, driving gears 31, 32, driven gears 33, 34, intermediate shaft 6,
7 to ring gear 63 and sun gear 61. Therefore, in the planetary gear mechanism 60, the rotation of the ring gear 63 and the sun gear 61 in the same direction causes the planetary pinion 62 to rotate to the ring gear 6.
3 and sun gear 61, they rotate integrally without relative movement, and are transmitted to the carrier 64, and then to the output shaft 3. Fourth forward speed...clutch 15 is operated. The rotation of the output shaft 1 of the engine is determined by the torque converter 20.
is transmitted to the output shaft 2 via. The rotation of the output shaft 2 is transmitted to the overdrive drive gear 41,
It is transmitted to the output shaft 3 via the overdrive driven gear 42 and the clutch 15. At this time, since the number of teeth of the overdrive drive gear 41 is greater than the number of teeth of the overdrive driven gear 42, the output shaft 3 rotates faster than the output shaft 2, resulting in an overdrive state. Reverse movement...The rotation from the output shaft 1 of the engine is transmitted to the output shaft 2 of the torque converter. Since the clutch 11 and the brake 13 are operating, the rotation from the output shaft 2 is transmitted to the sun gears 61 and 71 via the intermediate shaft 5, the driving gear 32, the driven gear 34, and the intermediate shaft 7.
is transmitted to. At this time, since the carrier 74 is fixed, the ring gear 73 is rotated by the sun gear 71 via the planetary pinion 72 in a direction opposite to the rotation of the intermediate shaft 7, and the rotation is transmitted to the output shaft 3. The power output to the output shaft 3 in this way is
The signal is transmitted to an output gear 50 that serves as an input to a differential gear (not shown). FIG. 2 shows another embodiment of the present invention, which is a power transmission mechanism in which the input of the overdrive device 40 is the output shaft 1 of the engine. The overdrive device 40 consists of an overdrive drive gear 43 and an overdrive driven gear 44, and the overdrive driven gear 44 is coupled to the output shaft 3 via a clutch 16. The other configurations and operations of the torque converter 20 and the transmission gear device 30 are the same as those shown in FIG. 1, so their explanations will be omitted.
Note that the oil pump 80 is disposed between the overdrive drive gear 43 and the speed change gear device 30. 3 and 4 are other embodiments of the present invention,
The overdrive device 40 connects the output shaft 2 of the torque converter or the output shaft 1 of the engine to the clutch 1.
Overdrive drive gears 45 and 47 are coaxially connected via gears 7 and 18, and overdrive driven gear 4 is connected to the overdrive drive gears 45 and 47 and coaxially connected to the output shaft 3.
6,48. The other configurations and operations of the torque converter 20 and transmission gear device 30 are the same as those shown in FIG. 1, and therefore their explanations will be omitted. As explained above, the present invention relates to an automatic transmission with an overdrive suitable for application to an FF type or an RR type automobile. According to the present invention, automatic gear shifting is achieved by appropriately selecting the gear ratio between the driving gear and the driven gear and the gear ratio of the overdrive device (the ratio of the number of teeth between the overdrive drive gear and the overdrive driven gear). It is possible to easily change the speed reduction ratio and speed increase ratio of the machine, and it is also possible to obtain a suitable speed reduction ratio and speed increase ratio according to the balance with the differential gear. In addition, by dividing the transmission gear system into two shafts and locating some of the frictional engagement devices (clutches 10, 11, brake 12) at the upper position in the figure, the axial dimension of the automatic transmission is shortened and compact. become. Furthermore, the overdrive device is configured with a spur gear,
Since power is transmitted through separate gear devices for 1st, 2nd, and 3rd speeds and 4th speed (overdrive), the axial dimension of the automatic transmission can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a power transmission mechanism showing one embodiment of the automatic transmission of the present invention, and FIGS. 2, 3, and 4 are power transmission diagrams showing other embodiments of the automatic transmission of the present invention. It is a skeleton diagram of the mechanism. Explanation of symbols, 1... Engine output shaft, 2...
Torque converter output shaft, 3...Output shaft, 4,
5, 6, 7... intermediate shaft, 10, 11, 15, 1
6,17,18...Clutch, 12,13...Brake, 14...One-way clutch, 20...Torque converter, 30...Transmission gear device, 31,3
2... Drive gear, 33, 34... Driven gear, 40
...Overdrive device, 41, 43, 45, 4
7... Overdrive drive gear, 42, 44,
46, 48... Overdrive driven gear, 50
...Output gear, 80...Oil pump, 90...
gear case.

Claims (1)

[Claims] 1. A torque converter coaxially connected to the output shaft of the engine, a first output shaft connected to the torque converter, and a torque converter disposed parallel to the first output shaft. a second output shaft, an overdrive device connected to the output shaft of the engine or the first output shaft, and a speed change gear device connected to the first output shaft for achieving a plurality of gears. In the automatic transmission, the overdrive device includes an overdrive drive gear coaxially connected to the first output shaft or the output shaft of the engine, and a second overdrive drive gear meshed with the overdrive drive gear. The speed change gear device includes an overdrive driven gear disposed concentrically with the output shaft, and a first clutch that connects the overdrive driven gear to the second output shaft in a detachable manner. a first intermediate shaft disposed coaxially with the first output shaft; a second intermediate shaft coaxially disposed with the first intermediate shaft; and a second intermediate shaft coupled with the first intermediate shaft. a first drive gear coupled to the second intermediate shaft; a second drive gear connected to the second intermediate shaft; second and third clutches that are connected; a third intermediate shaft that is coaxially disposed with the second output shaft; and a fourth intermediate shaft that is coaxially disposed with the third intermediate shaft; a first driven gear that meshes with the first driving gear and is connected to the third intermediate shaft; and a first driven gear that meshes with the second driving gear and is connected to the fourth intermediate shaft. a second driven gear; and first and second planetary gear mechanisms disposed concentrically on the fourth intermediate shaft, the ring gear of the first planetary gear mechanism being disposed on the third intermediate shaft. the sun gears of the first and second planetary gear mechanisms are connected to the fourth intermediate shaft, and the carrier of the first planetary gear mechanism and the second
A ring gear of a planetary gear mechanism is connected to the second output shaft, a first brake is provided for fixing a carrier of the second planetary gear mechanism, and a ring gear of the first and second planetary gear mechanism is connected to the second intermediate shaft. A second brake for fixing a sun gear of a planetary gear mechanism, the second and third clutches and the second brake being concentrically disposed on the first output shaft. transmission. 2. A torque converter coaxially connected to the output shaft of the engine, a first output shaft connected to the torque converter, and a second output shaft arranged parallel to the first output shaft. , an automatic transmission comprising an overdrive device connected to the output shaft of the engine or the first output shaft, and a speed change gear device connected to the first output shaft for achieving a plurality of gears, The overdrive device includes an overdrive drive gear disposed concentrically with the first output shaft or the output shaft of the engine, and an overdrive drive gear meshed with the overdrive drive gear and coaxially disposed with the second output shaft. an overdrive driven gear connected to the overdrive driven gear; and a first clutch that removably connects the overdrive drive gear to the first output shaft or the output shaft of the engine;
The speed change gear device includes a first intermediate shaft coaxially disposed with the first output shaft, a second intermediate shaft coaxially disposed with the first intermediate shaft, and the first intermediate shaft. a first drive gear connected to the intermediate shaft; and a first drive gear connected to the intermediate shaft;
a second drive gear coupled to an intermediate shaft; second and third clutches detachably coupled to the first output shaft, the first intermediate shaft, and the second intermediate shaft, respectively; A third intermediate shaft disposed coaxially with the second output shaft, a fourth intermediate shaft disposed concentrically with the third intermediate shaft, and meshing with the first drive gear. and a first driven gear coupled to the third intermediate shaft, a second driven gear meshing with the second drive gear and coupled to the fourth intermediate shaft, and a second driven gear coupled to the fourth intermediate shaft. a first and a second planetary gear mechanism arranged concentrically on an intermediate shaft, a ring gear of the first planetary gear mechanism is connected to a third intermediate shaft, and a ring gear of the first planetary gear mechanism is connected to a third intermediate shaft; A sun gear of the gear mechanism is connected to a fourth intermediate shaft, a carrier of the first planetary gear mechanism and a ring gear of the second planetary gear mechanism are connected to the second output shaft, and a sun gear of the second planetary gear mechanism is connected to the second output shaft. a first brake for fixing the carrier, and a second brake for fixing the sun gears of the first and second planetary gear mechanisms to the second intermediate shaft;
What is claimed is: 1. An automatic transmission comprising: a brake; wherein the second and third clutches and the second brake are provided concentrically with the first output shaft.