JPS6114385B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a speed change gear device for an automatic transmission, and in particular, the present invention relates to a speed change gear device for an automatic transmission. The present invention relates to a speed change gear device for an automatic transmission that obtains a speed gear ratio.

[Conventional technology]

A variable speed gear device that combines a planetary gear device and a two-shaft gear device is a tractor that can be used for agricultural and industrial purposes by combining a planetary gear device with a selective gear transmission device, as seen in Japanese Patent Application Laid-Open No. 1660-1983. The transmission was damaged.

[Problem that the invention seeks to solve]

The above-mentioned transmission device has a problem that the transmission device becomes large because the planetary gear device and the selective gear transmission device are connected in series.

[Means for solving problems]

A gear transmission device for an automatic transmission according to the present invention includes a cover connected to an output shaft of an engine, a pump impeller connected to the cover, and a torque input to the pump impeller fluidly transmitted from the pump impeller. a torque converter comprising: a turbine runner that is rotated by the turbine runner; a stator that uses fluid from the turbine runner to promote rotation of the pump impeller and is connected to a one-way clutch so that the stator can rotate in only one direction; a planetary gear mechanism in which one of the three elements of a ring gear, a sun gear, and a carrier that pivotally supports a planetary pinion meshed with the ring gear and sun gear is connected to the turbine runner; an input shaft connected to yet another element of the planetary gear mechanism; and a clutch that removably engages the input shaft and the turbine runner within the torque converter. an output shaft to which power is transmitted from the input shaft; a forward state in which the input shaft and the output shaft are connected rotatably in the same direction; The vehicle is configured to include a two-shaft type gear device capable of achieving a reverse state in which the output shaft is rotatably coupled in a reverse direction and a parking state in which the output shaft is fixed.

〔Effect of the invention〕

With the above configuration, the speed change gear device of the automatic transmission of the present invention has the effect that the planetary gear and the clutch are disposed within the torque converter, and the axial direction can be shortened because the gear device uses a two-shaft type gear device to achieve forward and reverse movement.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic diagram showing the power transmission mechanism of the automatic transmission of the present invention, FIG. 2 is a sectional view of the power transmission mechanism of the automatic transmission of the present invention, and FIG. A schematic diagram of a shift lever is shown.

In FIG. 1, the automatic transmission of the present invention includes an engine output shaft 1, an input shaft 2, intermediate shafts 3 and 4, an output shaft 5, a torque converter 10, a clutch 15,
Brake 16, planetary gear mechanism 20 and input shaft 2
It consists of a gear device 30 disposed at the rear of the vehicle. Torque converter 10 is pump impeller 1
1, a turbine runner 12, and a stator 13 fixed via a one-way clutch 14.
An output shaft 1 of the engine is connected to a pump impeller 11, and a turbine runner 12 is connected to an input shaft 2 via a clutch 15. The planetary gear mechanism 20 includes a sun gear 21, a planetary pinion 22, a ring gear 23, and a carrier 24.
1 is integrally provided on the intermediate shaft 3 provided with a brake 16. Ring gear 23 is torque converter 10
The carrier 24 is connected to the turbine runner 12 of the
is connected to the input shaft 2. Input shaft 2 is gear device 3
0, and a reverse gear 35 is rotatably mounted on the input shaft 2.

The output shaft 5 includes a forward gear 32, a reverse gear 33, and a parking gear 34. The intermediate shaft 4 disposed parallel to the output shaft 5 includes a gear 36 that meshes with a reverse gear 35 and a gear 37 that meshes with the reverse gear 33 via an idler gear 38. A sleeper 40 that moves in accordance with the operation of a shift lever provided at the driver's seat switches between forward movement, reverse movement, and parking. When parking, the parking pole 39 meshes with the parking gear 34 to fix the output shaft 5.

Further, the configuration of the automatic transmission of the present invention will be explained in detail with reference to FIG.

The cover 50 of the torque converter 10 connected to the output shaft 1 of the engine is welded to the pump cover 51, and the impeller blade 52 is welded to the pump cover 51.
and is caulked to the core 53. Furthermore, the pump cover 51 is connected to an oil pump 101 which is a hydraulic pressure generation source.
It is welded to a sleeve 54 for driving. The turbine blades 55 are caulked to a turbine outer shell 56 and a core 57. The turbine shell 56 is welded to the ring gear 23 of the planetary gear mechanism 20 . The turbine shell 56 also includes a driven clutch member 5 for the clutch 15 in a part thereof.
8 is formed. The stator 13 is the stator shaft 5
The stator shaft 59 is spline-fitted to the outer race 6 through the one-way clutch 14 at one end thereof.
0, it is fixed to the oil pump cover 61, and the stator 13 is allowed to rotate only in one direction.

The planetary gear mechanism 20 is composed of a sun gear 21 formed at one end of the intermediate shaft 3, a ring gear 23 fixed to the turbine outer shell 56, and a planetary pinion 22 meshing with both gears 21 and 23 and pivotally supported by a carrier 24. , the carrier 24 is spline-fitted to the input shaft 2. The intermediate shaft 3 is connected to a hub 62 of the brake 16 at the other end. The brake 16 includes a disk 63 spline-fitted to the hub 62, a plate 64 spline-fitted to the case 70,
Piston 65 disposed inside oil pump cover 61
When the brake 16 is operated, the sun gear 21 is fixed and the rotation of the ring gear 23 is decelerated and transmitted to the carrier 24. The clutch 15 includes a clutch plate 67 that is spline-fitted to be slidable in the axial direction to a hub 66 that is spline-fitted to the input shaft 2.
, a drive clutch member 68 provided at one end of the clutch plate 67 , a driven clutch member 58 provided on the turbine outer shell 56 , an apply side oil chamber 69 and a release side oil chamber 71 partitioned by the clutch plate 67 . It is operated by the pressure difference between the two oil chambers. When the clutch 15 operates, the turbine outer shell 56 and the input shaft 2 are connected.

The gear device 30 arranged at the rear of the input shaft 2 is
An input gear 31 formed on the input shaft 2, a forward gear 32 spline-fitted to the output shaft 5, and a reverse gear 33.
and a parking gear 34, a reverse gear 35 rotatably mounted on the input shaft 2, gears 36 and 37 integrally provided on the intermediate shaft 4 parallel to the output shaft 5, and an idler gear 38. 35 meshes with gear 36, and gear 37 meshes with idler gear 38.
It meshes with the reverse gear 33 via. A shift fork 73 is fixed to a shift fork shaft 72 that moves in the axial direction in response to the operation of a shift lever provided at the driver's seat. In addition, the shift fork 73 is connected to the input gear 3 in order to switch between forward and backward movement.
1 and a sleeve 40 that meshes with the forward gear 32 and the reverse gear 35. In addition, a parking cam 74 is provided on the shift fork shaft 72, and when parking, the parking pole 3
9 is pushed down as shown in the figure to engage with the parking gear 34 and fix the output shaft 5.

The operation of the automatic transmission of the present invention having such a configuration will be explained.

The shift lever of the automatic transmission of the present invention takes an H-type shift position as shown in FIG. The structure is such that both the speed selection valve and shift fork operate.

In the N position, the input gear 31 and the forward gear 32 are connected by the sleeve 40. However, since both clutch 15 and brake 16 are released, no engine power is transmitted to output shaft 5.

In the D position, the input gear 31 and the forward gear 32 are connected by the sleeve 40.

D position, forward first speed...The brake 16 is activated and the clutch 15 is released. Engine output shaft 1
The power is transmitted via the torque converter 10 to the ring gear 23 of the planetary gear mechanism 20 connected to the turbine runner 12. Since the sun gear 21 is fixed by the operation of the brake 16, the rotation of the ring gear 23 is decelerated and transmitted to the carrier 24, and then to the input shaft 2. Rotation of the input shaft 2 is transmitted to the output shaft 5 via the input gear 31, the sleeve 40, and the forward gear 32.

D position forward 2nd speed...brake 16 is released and clutch 15 is operating. Power from the output shaft 1 of the engine is transmitted via a torque converter 10 to a turbine runner 12 and directly to the input shaft 2 via a clutch 15. The rotation of the input shaft 2 is transmitted via the input gear 31, the sleeve 40, and the forward gear 32 to the output shaft 5, which is arranged parallel to the output shaft.

In the L position, the input gear 31 and the forward gear 32 are connected by the sleeve 40. Further, since the clutch 15 is released and the brake 16 is activated, the power from the engine is decelerated and transmitted to the output shaft 5 in the same manner as in the case of the D position and the first forward speed.

In the R position, the shift fork 73 is moved to the left in the figure by the shift lever, and the input gear 31 and the reverse gear 35 are connected by the sleeve 40. Also, the brake 16 is activated and the clutch 15 is released. Power from the output shaft 1 of the engine is reduced in speed and transmitted to the input shaft 2 via the torque converter 10 and the planetary gear mechanism 20. The power transmitted to the input shaft 2 is transmitted to the gear 36 provided on the intermediate shaft 4 via the input gear 31, the sleeve 40, and the reverse gear 35. Furthermore, gear 37, idler gear 3
8. The rotation direction is reversed and transmitted to the output shaft 5 via the reverse gear 33.

In the P position, the shift lever moves the shift fork 73 to the right in the figure, and the parking cam 74
pushes the parking pole 39 downward in the figure and engages with the parking gear 34, thereby fixing the output shaft 5.

FIG. 4 is a sectional view of a power transmission mechanism for an automatic transmission showing another embodiment of the present invention. In FIG. 4, the method for extracting power from the gear device 30 is different from that in FIG. 2, and is configured to be applicable to a front engine/front drive type automobile.

During forward movement, the power of the input shaft 2 is transmitted to the intermediate shaft 4 via the input gear 31, sleeve 40, and forward gear 32, and further transmitted to the output shaft parallel to the intermediate shaft via gears 80 and 81. 5 will be informed.

In addition, when traveling in reverse, the power of the input shaft 2 is transmitted through the input gear 31, the sleeve 40, and the reverse gear 35 to the gears 36 and 3 rotatably mounted on the output shaft 5.
7, idler gear 38, reverse gear 33
is transmitted to the intermediate shaft 4 via. Further gear 8
0 and 81, the rotational direction is reversed and transmitted to the output shaft 5.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the power transmission mechanism of the automatic transmission of the present invention, FIG. 2 is a sectional view of the power transmission mechanism of the automatic transmission of the present invention, and FIG. 3 is a shift lever of the automatic transmission of the present invention. FIG. 4 is a cross-sectional view of a power transmission mechanism of an automatic transmission according to another embodiment of the present invention. Explanation of symbols, 1... Engine output shaft, 2...
Input shaft, 3... First intermediate shaft, 4... Second intermediate shaft, 5... Output shaft, 10... Torque converter,
11... Pump impeller, 12... Turbine runner, 13... Stator, 14... One-way clutch, 15... Clutch, 16... Brake, 20
... Planetary gear mechanism, 21 ... Sun gear, 22 ...
Planetary pinion, 23...Ring gear, 24
...Carrier, 30...Gear device, 31...Input gear, 32...Forward gear, 33...First reverse gear, 34...Parking gear, 35...Second reverse gear, 36, 37... ...Gear, 38...Idler gear, 39...Parking pole, 40...Sleeve.

Claims (1)

[Scope of Claims] 1. A cover connected to an output shaft of an engine, a pump impeller connected to the cover, and a turbine runner to which torque input to the pump impeller is fluidly transmitted from the pump impeller. , a torque converter including a stator that facilitates rotation of the pump impeller with fluid from the turbine runner and is connected to a one-way clutch so that the stator can rotate in only one direction; and a ring gear disposed within the torque converter. , a sun gear, and a planetary gear mechanism in which one of the three elements of a carrier that pivotally supports a planetary pinion meshed with the ring gear and the sun gear is connected to the turbine runner, and other elements of the planetary gear mechanism can be fixed. an input shaft connected to yet another element of the planetary gear mechanism; a clutch that removably engages the input shaft and the turbine runner within the torque converter; and the input shaft. an output shaft to which power is transmitted, an output shaft disposed between the input shaft and the output shaft, and a forward state in which the input shaft and the output shaft are rotatably connected in the same direction, and a reverse state in which the input shaft and the output shaft are rotated. 1. A speed change gear device for an automatic transmission, comprising a two-shaft gear device capable of achieving a reverse state in which the output shaft is rotatably coupled in a direction and a parking state in which the output shaft is fixed. 2. The speed change gear device for an automatic transmission according to claim 1, wherein the brake is disposed on the outer periphery of the one-way clutch. 3. The two-axis gear device includes a shift fork interlocked with a shift lever, a sleeve interlocked with the shift fork, an input gear provided on the input shaft, a forward gear provided on the output shaft, and a forward gear provided on the output shaft. a second reverse gear rotatably mounted on the input shaft; an intermediate shaft disposed parallel to the input shaft; and a second reverse gear rotatably mounted on the input shaft; a first gear that meshes with a second reverse gear; and a second gear that is provided on the intermediate shaft and meshes with the first reverse gear via an idler gear; The speed change gear device for an automatic transmission according to claim 1, wherein the input gear and the forward gear or the second reverse gear are selectively connected to achieve forward or reverse movement. .