KR19980021268A - Automotive automatic transmission - Google Patents

Abstract

The present invention relates to a continuously variable transmission for a vehicle, a conventional automobile automatic transmission has a torque converter is used to reduce the power transmission efficiency and there is a step, so that a number of elements are used for shifting, which is complicated in structure and increases the manufacturing cost accordingly.

In order to solve the above problems, in order to continuously shift without steps, the worm wheel 15 rotates the worm 16 to revolve the worm 16 and the motor 40 controls the amount of rotation of the worm 16 by the worm wheel 15. It is possible to continuously vary the rotation speed and the worm 16 idle speed difference.

The CVT is designed to extend the range of CVT using the planetary gear system to match the driving conditions of the car. It is an automatic CVT that can reduce fuel consumption, improve ride comfort, and improve power transmission efficiency.

Description

Automotive automatic transmission

1 is a longitudinal cross-sectional view of the whole

2 is a right side view of the present invention

3 is a left side view of the present invention

Figure 4 is a longitudinal cross-sectional view of the present invention in advance

Figure 5 is a longitudinal cross-sectional view of the back of the present invention

6 is a longitudinal sectional view of the engine brake in operation

7 is a longitudinal sectional view in which the gear ratio of the sun gear and the ring gear is 1: 0.

* Explanation of symbols for the main parts of the drawings

DESCRIPTION OF SYMBOLS 1 Input side, 2 main shaft, 3 forward auxiliary shaft, 4 output shaft, 8 clutch hub 9 clutch sleeve, 12 sun gear, 13 planetary gear, 14 ring gear, 17 brake sun gear, 18 brake Planetary gears, 19: brake ring gear, 20: forward idle gear, 25: support plate, 15: worm wheel, 16: worm, 40: servomotor, 33: brake, 41: connection terminal, 42: brush, 26 : Weight, 50: bearing

Automotive transmission is a device that transmits the engine's rotational force and rotational speed to the wheels according to the driving resistance such as loading load, traveling speed, road condition, etc., and the conditions required for the ideal transmission are continuously shifted without steps. It should be possible, easy to organize, fast, reliable, quiet and efficient in power transmission.

Currently used car transmissions are using manual and automatic transmissions, neither of which can be continuously shifted without steps.

In particular, the automatic transmission absorbs shocks when shifting by using a torque converter, regulates the power flow, but reduces the power transmission efficiency of the torque converter and reduces the speed of the power flow, increasing fuel economy and using various elements for shifting. It is complicated, and manufacturing cost is increasing.

In order to solve the above problems, efforts have been made to continuously shift without stepping with gears only.

The design of the present invention was made by using the variable speed transmission device of the 1996 Women's Utility Model Registration Application No. 828. The main shaft 2 is inserted into the input shaft 1 through which power is input from the power unit so as to be freely rotatable. The engine brake sun gear 17, sun gear 12, and worm wheel 5 are fixedly installed from the left side.

A forward gear 10 is provided on the left side of the main shaft 2 so as to be freely idle, and is fixed to the spline of the main shaft 2 on the right side of the forward gear 10 by a clutch sleeve 9 around its outer circumference. The clutch hub (8) fitted. The reverse gear 11 is installed to the right side of the clutch hub 8 together with the forward gear, and the clutch sleeve 9 is fitted to the outside of the clutch hub 8 through a spline, and the clutch sleeve 8 is fixed to the left side when the clutch sleeve 8 is fixed. When moving, the forward gear 10 and the clutch lower portion 8 is fixed, and when moving to the right, the reverse gear 11 and the clutch hub 8 are installed to be fixed.

A subordinate shaft (3) parallel to the main shaft (2) is installed and installed on the subordinate shaft (3) of the forward idle gear (20) engaged with the forward gear (10), and an output shaft (4) parallel to the subordinate shaft (3) is installed. The forward output gear 21 meshed with the forward idle gear 20 is fixed to the output shaft 4.

The reverse output gear 22 meshed with the reverse gear 11 is fixed to the output shaft 4. Meanwhile, the worm 16 engaged with the worm wheel 15 is fixed to the support plate 25 using the fixing bar 27 so that the worm 16 can rotate by receiving rotational force from the motor 40. The connecting bar 41 on the straight line and the support bar 29 for fixing the muter 40 are hollow and are installed so that electric energy is transferred from the connecting terminal 41 to the motor 40 by inserting an electric wire therein. did.

The planetary gear 13 meshed with the sun gear 12 was freely installed and fixed to the fixed shaft 6 so as to be able to rotate, and was fixed to the left side of the support plate 25 using the fixed shaft 6.

The ring gear 14 engaged with the planetary gear 13 is fixed to the fixed shaft 5 fixed to the planetary gear 18 for brakes using the fixed bar 30, and the fixed shaft 5 is fixed to the fixed bar 31. ) To the main shaft (2).

The brake planetary gear 18 engaged with the brake sun gear 17 is freely fixed to the fixed shaft 5 so as to be rotatable, and is engaged with the ring gear 19.

The brake 33 which applies a braking force to the ring gear 19 was provided.

In the present invention configured as described above, the rotational force transmitted to the worm wheel 15 in FIG. 2 does not rotate the worm 16 due to the characteristics of the worm gear, and the worm 16 itself receives the rotational force in the same direction as the worm wheel 15. At this time, when the motor 40 rotates the worm 16, the worm 16 is rotated or decelerated as much as the worm 16 rotates to revolve around the worm wheel 15. However, in order to increase the speed of the motor 40, the power source must be large, so that the movement maintaining the volume is large, and electrical energy is required, so it is proposed for use.

Since the difference between the rotational speed of the worm wheel 15 and the revolution speed of the worm 16 revolving around the worm wheel 15 occurs, the planetary gear 13 rotates by the difference, and the planetary gear 13 rotates. It decelerates as much as it decelerates and transmits to the ring gear 14.

As described above, since the rotation speed of the motor 40 is controlled, it can be seen that the speed ratio is changed. According to the driving condition of the vehicle ...

Engine start

Start is performed in the state of FIG.

Power is transmitted to the input shaft 1 at the same time as the engine is started and transmitted to the clutch hub 8 and the sleeve 9, but the clutch sleeve 9 is in a neutral state to turn off the power flow.

Looking at the flow of power ......

When driving a vehicle

When the engine rotation speed is input to the transmission control unit at the same time as the engine starts, the transmission control unit is calculated to give the command that the ratio of the rotational speed of the sun gear 12 to the rotational speed of the ring gear 14 is 1: 0 (Fig. 7). Degrees state)

Using the above example as an example

Sun gear (12) Number of teeth 20 Ring gear (13) Number of teeth 60. Suppose that the worm 16 rotates one wormwheel when the worm 16 rotates eight times.

When the engine is idle (rpm) 800 (rpm) and the planetary gear (13) has an idle speed of 200 (rpm), the planetary gear (13) process quantity and the rotating amount are the same, so the ring gear (14) rotation speed is 0. Becomes

At this time, 600 (rpm) difference occurs between the rotational speed 800 (rpm) of the sun gear 12 and the rotational speed 200 (rpm) of the planetary gear 14, so the gear ratio of the worm gear is 8: 1, so the worm 16 is 4800 (rpm). When rotating at, the difference between the rotational speed of the worm wheel 15 and the total revolution speed of the worm 16 becomes 600 (rpm).

Therefore, the transmission control unit commands the motor 40 to rotate by 4800 rpm.

Then, when the brake pedal is raised and the selector lever is moved to drive, the rotation difference between the forward gear 10 and the clutch sleeve 9 is eliminated, so that the forward gear 10 and the clutch hub 8 are naturally fixed using the clutch sleeve 9. do. Then, if you move your foot from the brake pedal to the accelerator pedal, the engine (rpm) will increase and start slowly. The transmission control unit continuously adjusts the transmission ratio suitable for the driving conditions of the vehicle by adjusting the rotational speed of the motor 40. The transmission control unit collects information of various elements to control the rotation speed of the motor 40.

Looking at the power flow ...

Figure 4 shows the power flow when driving forward.

When braking the vehicle .....

When you step on the accelerator pedal and move it to the brake pedal, the engine (rpm) drops to the idle (rpm), and the transmission control unit analyzes this information and commands the sun gear 12 rotation speed and the ring gear rotation speed ratio to be 1: 0. It lowers power and brakes.

When reversing the vehicle ......

If you put your foot on the brake pedal for reversing the vehicle and move the selector lever to the retracted position, the engine (rpm) will be in the idle state and the transmission control unit will command the motor 40 to zero the ring gear 14 rotational speed ( 7 state) The clutch sleeve 9 and the reversing gear 11 are fixed using the clutch sleeve 9.

Then take your foot off the brake pedal and move on to the accelerator pedal.

Figure 4 shows the power flow in reverse.

Looking at the power flow .....

The transmission from the input side (1) to the main shaft (2) is the same as when traveling, and the clutch hub (8) ---- clutch sleeve (9) --- reverse gear (11) --- output shaft reverse gear (22) --- output shaft (4)

When the vehicle engine brake is operating ...

When the engine brake switch is ON, the brake 33 applies the braking force to the engine brake ring gear 19, and the power transmitted to the main shaft 2 revolves the planetary gear 18 for the engine brake and the ring gear 19 is fixed. As the planetary gear 18 rotates and the planetary gear 18 rotates, the sun gear 17 can be driven at a high speed to apply a braking force.

On the other hand, at this time, there is a difference in the idle speed of the sun gear 12 and the planetary gear 13, the transmission control unit calculates this to cause the motor 40 to rotate as much as the difference.

In order to apply the engine brake, the above-mentioned device is not necessary, but in order to increase the driving speed of the worm wheel 15 using the motor 40, the power source of the motor 40 is increased.

Therefore, medium and large vehicles require such a device.

Looking at the power flow. (Same as Figure 6)

Output shaft (4) --- Gear (21) --- Gear (20) --- Gear (10) --- Clutch sleeve (9) --- Clutch hub (8) --- Spindle (2)- Fixed shaft (5) --- Planetary gear (18) --- Sun gear (17) --- Input shaft (1)

The transmission configured as described above is made of gear gears only to increase the power transmission efficiency to reduce fuel consumption and can be used in medium and large vehicles.

It is possible to shift continuously without stepping without shifting the power, thereby improving ride comfort, reducing power loss, maintaining a gear ratio suitable for driving resistance, reducing fuel consumption, preventing the engine from being overloaded, and accelerating performance. Can be improved. Simple structure makes it possible to reduce the price.

Claims (6)

The brake sun gear 17, sun gear 12, and worm wheel 15 are fixed to the input side 1 from the left side, and the sun gear 12 is meshed with the planetary gear 13, and the planetary gear 13 is fixed to be able to rotate. The shaft 16 is fixed to the support plate 25 and engaged with the ring gear 14, and the ring gear 14 is hollowed on the main shaft 2 and fixed with the main shaft 2 on the right side to freely rotate, The clutch hub 80 is fixed to the main shaft 2 in the form of a spline and between the main shaft 2 and the ring gear 14 is fixed so that the brake planetary gear 18 engaged with the brake gear gear 17 can rotate. The shaft (5) is used to fix it to the main shaft (2) and ring gear (14). The worm wheel 15 is engaged with the worm 16 to fix the support plate 25 so as to be rotatable, and to fix the rotational force of the motor 40 to be transmitted to the worm 16 and to supply the electric energy of the motor 40. The support bar 29 is used to fix the connector 41, and the electric wire 45 is inserted and fixed to the motor 40. As shown in FIG. The connection terminal 41 receives electric energy using the brush 42. A brake 33 capable of applying a braking force to the outer side of the ring gear engaged with the brake planetary gear 18 is provided. The left side of the clutch hub 80 fixed in the middle of the main shaft (2) is installed to rotate the forward gear 10 freely. On the right side, the forward gear 11 is freely installed and the forward idle gear 20 is engaged. It is an automobile transmission having a container gear 11. According to claim 1, when one of the three elements of the planetary gear device, the sun gear 12, the support plate 25 (carrier), the ring gear 25 is fixed to each other, the rotation speed of the other one is changed. Stepless transmission using the servo motor 40 for each fixing the support plate 25 (carrier) based on the rotation speed of the sun gear 12 using the worm wheel 15 and the worm 16. Claim 2 is an automatic transmission that controls the rotational speed of the servomotor 40 by collecting and analyzing the driving conditions continuously changing during the vehicle driving using the transmission control unit to control the rotational speed of the servomotor 40. If you look at this table ..... The automatic transmission which can shift forward and backward using the clutch sleeve 9, without using a main clutch in Claim 1 In claim 1, the connection terminal 42 is installed in a line with the input shaft, and the support bar 29 is made of hollow so that the electric wire 45 can be inserted and installed for supplying electrical energy. Automatic transmission improves serviceability and avoids contact with lubricants It is an automatic transmission provided with a fixed weight 26 on the support plate 25 to maintain the balance of movement.