JP3215940B2 - Continuously variable transmission with planetary gear two-step transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field of use relating to a transmission for an automobile.

[0002]

2. Description of the Related Art A conventional transmission for an automobile shifts gears stepwise.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the impact during shifting by shifting the transmission of a motor vehicle steplessly.

[0004]

According to the present invention, as a means for solving the above-described problems, the transmission itself, which has not been considered conventionally, is rotated as a rotating body, and the role of each gear is considered therein. Sun gear 20 and ring gear 6
Utilizing the characteristics of the differential gear which does not need to have a constant rotation ratio with the sun gear 20
And the ring gear 6 are divided into two, and are directly and indirectly divided once from the sun gear 20 through the reduction gear mechanism from the ring gear 6 and simultaneously transmit two torques having different rotation ratios and torques to the same center shaft 1. However, since the torque is transmitted only to the ring gear 6 on the reduction gear mechanism side where the torque is easily transmitted, the torque distribution device is provided so that the torque is also transmitted to the sun gear 20 side.

[0005]

Based on the above-mentioned means, the transmission functions as an automobile transmission having the function of a continuously variable transmission of two-stage transmission by the planetary gear as the differential gear.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described mainly with reference to FIG. 1. When the rotational force of an engine is transmitted to a rotational force input portion 29 of a rotary cover 3 also serving as a pinion carrier in a transmission cover 2, the rotary cover is rotated. 3 rotates to rotate the pinion gear 5 around the center shaft through the carrier pin 4 and further to rotate the sun gear 20 and the ring gear 6.

However, the sun gear 20 directly
The ring gear 6 is a reduction gear mechanism / center shaft gear 2
1, the rotation force tries to rotate the center shaft 1 through the ring gear 6 on the reduction gear side.

The rotation of the torque distribution device-side center shaft gear 21 and the torque distribution device-side pinion gear 22 is controlled by opening and closing the liquid flow path 23 with the switching device 25 using a torque distribution device. The rotation of the sun gear 20 and the pinion gear 5 is controlled, and the rotational force is distributed between the sun gear 20 and the ring gear 6 according to the degree of control, and the center shaft 1 is steplessly rotated in a stepless manner according to the degree of the distribution. I made it.

Further, the rotation of the pinion gear 18 in the rotary power interrupting device and the center shaft gear 19 of the rotary power interrupting device are controlled by opening and closing the liquid flow opening / closing device 28 on the rotary power interrupting device side by using the rotary power interrupting device. However, it is also conceivable to impart intermittent transmission of the rotational force from the ring gear 6 to the rotational force interrupting device side center shaft gear 19.

[00010]

As described above, according to the present invention, the center shaft 1 is rotated steplessly in a stepwise manner as compared with the conventional method, and forward and backward movements are enabled by combining the sizes of the respective gears.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a continuously variable transmission with a two-stage transmission of planetary gears, in which a hatched portion represents a vertical cross section cut along a plane passing through a center line of a center shaft 1. FIG. (The arrow is the direction in which the cut surface in FIGS. 2 to 6 is drawn.)

FIG. 2 is a view showing a cross section taken along line BB in FIG. 1;

FIG. 3 is a view showing a cross section taken along the line CC in FIG. 1;

FIG. 4 is a diagram showing a cross section taken along line DD in FIG. 1;

FIG. 5 is a diagram showing a cross-sectional portion taken along the line AA in FIG. 1;

FIG. 6 is a view showing a cross-sectional portion taken along the line EE in FIG. 1;

[Explanation of symbols]

 The reference numerals are common in FIGS. DESCRIPTION OF SYMBOLS 1 Center shaft 2 Transmission cover 3 Rotation cover (also serves as pinion carrier) 4 Carrier pin 5 Pinion gear 6 Ring gear 7 Ring gear side hollow shaft 8 Ring gear side hollow shaft gear 9 Reduction pinion gear 10 Reduction outer pinion gear 11 Reduction inner pinion gear 12 ・ 13 Carrier pin DESCRIPTION OF SYMBOLS 14 Rotational force interrupting device side hollow shaft gear 15 Rotating force interrupting device side hollow shaft 16 Rotating force interrupting device side pinion carrier 17 Rotary force interrupting device internal pin 18 Rotational force interrupting device inner pinion gear 19 Rotating force interrupting device side center shaft gear 20 Sun gear (differential gear side shaft gear) 21 Torque distribution device side center shaft gear 22 Torque distribution device side pinion gear 23 Torque distribution device side liquid flow path 24 Spring 25 G Click distribution device side liquid flow channel opening and closing device 26 rotational force interrupting device side liquid flow path 27 spring 28 rotating force interrupting device side liquid flow channel opening and closing device 29 rotational force input portion 30 the rotational force output portion

Claims (1)

(57) [Claims] A rotational force from an engine is input into a transmission cover (2), and the transmission cover (3) as a rotating body for rotating the transmission itself passes through the interior of the rotation cover (3). A center shaft (1) having a function as an output shaft for rotational force, a sun gear (20) fixed to the center shaft (1), a pinion gear (5) meshing with the sun gear (20), and the pinion gear (5). )
A planetary gear device as a differential gear comprising a ring gear (6) meshing with the ring gear, a ring gear-side hollow shaft (7) extending from the ring gear (6), and the ring gear of the ring gear-side hollow shaft (7) A ring gear side hollow shaft gear (8) integrally provided on the opposite side to (6) is rotatably fitted to the center shaft (1) and meshes with the ring gear side hollow shaft gear (8). A reduction pinion gear (9) is provided integrally with a reduction outer pinion gear (10) via a carrier pin, and a rotational force interrupter-side hollow shaft meshes with a reduction inner pinion gear (11) meshed with the reduction outer pinion gear (10). The gear (14) and the rotational force interrupter-side hollow shaft gear (14) are integrally provided with the rotational force interrupter. Together with the hollow shaft (15) are rotatably fitted to said center shaft (1),
A pinion carrier (1) integrally provided on the side of the hollow shaft (15) on the side of the torque interrupter opposite to the hollow shaft gear (14) on the side of the torque interrupter.
6) A pinion gear (18) in the rotational force interrupting device rotatably via a carrier pin (17) in the rotational force interrupting device.
And the pinion gear (1
8) a reduction gear device provided by meshing with a center shaft gear (19) provided on the rotational force interrupting device side integrally provided on the center shaft (1); and a torque distribution device fixedly provided on the center shaft (1). Center shaft gear (2
1) a torque distribution device side pinion gear (22) which is provided integrally with the ring gear side hollow shaft gear (8) via a carrier pin and meshes with the torque distribution device side center shaft gear (21); A gear pump device comprising a torque distribution device-side liquid flow path (23) connecting to the outlet, and a torque distribution device-side liquid flow path opening / closing device (25), which is input from the engine to the rotary cover (3). The rotational force is divided by a planetary gear device in both directions of a sun gear (20) as a high-speed transmission side and a ring gear (6) as a low-speed transmission side having the characteristics of a differential gear that does not require a constant rotation ratio. One of the two rotational forces on the side of the sun gear (20) as the high-speed differential gear is directly transmitted to the output shaft (1), and the ring gear (6) as the low-speed differential gear Is transmitted to an output shaft (1) via a reduction gear device, and the rotation of the gear is stopped by closing a discharge port of the gear pump device. Are opened and closed by pushing in and out of the torque distribution device side liquid flow path opening / closing device (25), and the torque distribution device side center shaft gear (21) and the torque distribution device side pinion gear according to the resistance force corresponding to the degree of opening and closing. The control for changing the rotation speed of (22) is performed, and the rotation of the sun gear (20) and the pinion gear (5) is further controlled through this control. When the resistance force is large, the rotation force is reduced by the lock phenomenon between the gears. In this state, the transmission is transmitted directly to the output shaft (1) through the sun gear (20), and as the resistance decreases, the locking phenomenon is released and the reduction gear is easy to transmit the transmission force. The stage of each gear is transmitted to the ring gear (6), and the rotational force is distributed to the sun gear (20) and the ring gear (6) according to the degree of the resistance, and the output shaft is disabled according to the degree of the distribution. A continuously variable transmission with a two-step transmission of planetary gears, wherein the transmission is shifted stepwise.