KR0180403B1 - Cvt for rear drive vehicle - Google Patents

Abstract

The present invention provides a continuously variable transmission for a vehicle that achieves fuel economy and power performance by using a continuously variable transmission characteristic of a front wheel driving method, and a torque converter configured to receive torque from an engine for torque conversion to realize the same;

Shifting means for receiving the rotational power output from the torque converter by gear transmission and belt transmission and performing stepless speed change according to the rotational speed input from both sides;

A continuously variable transmission device for a vehicle comprising a forward and backward control means connected to a ring gear directly connected to a second shaft provided with a driven pulley of the shift means to determine forward and backward directions of the vehicle and output rotational power thereof. It is done.

Description

Stepless transmission for rear wheel drive

1 is a view showing a continuously variable transmission for a vehicle according to the present invention.

2 is a block diagram of a pulley diameter displacement generating means applied to the present invention.

3 is a block diagram showing a second embodiment according to the present invention.

4 is a block diagram showing a third embodiment according to the present invention.

5 is a block diagram showing a fourth embodiment according to the present invention.

6 is a block diagram showing a fifth embodiment according to the present invention.

7 is a block diagram showing a sixth embodiment according to the present invention.

[Field of Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuously variable transmission gear for a vehicle, and more particularly, to a continuously variable transmission apparatus for fuel efficiency and power performance using the continuously variable transmission characteristics of a pulley by a front engine rear wheel driving method.

[Private Technology]

The transmission of the vehicle has a function of transmitting the engine driving force to the drive wheels. The transmission includes a manual transmission in which the driver directly selects a shift stage at the driver's will, and an automatic shift in which the vehicle shifts automatically according to driving conditions of the vehicle. It is roughly divided into a transmission, a manual transmission in which a driver directly selects a shift stage at the will of the vehicle, and a continuously variable transmission in which continuously shifting is performed without a specific shift region between each shift stage.

In the above-described transmission device, the present invention relates to a continuously variable transmission having a great advantage in terms of fuel economy, power transmission performance, and weight by supplementing the disadvantages of the automatic transmission using hydraulic pressure, and the continuously variable transmission thereof has an input shaft. The method using the diameter displacement of the pulley mounted on the output shaft is mainly used.

[Summary of invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a continuously variable transmission apparatus for a fuel economy and power by using a continuously variable transmission characteristic of a front engine front wheel driving method.

The present invention for realizing this is provided with a torsional damper which is installed on the output shaft of the engine to absorb the torsional vibration in accordance with the torque change;

A belt disposed on a first shaft connected to an output shaft of the torsional damper so as to continuously vary the contact radius of the belt and the pulley and a second shaft spaced apart in parallel with the first shaft at a predetermined distance. A shifting means comprising drive and driven pulleys, and a first shaft disposed in parallel with the second shaft so as to be driven forward and backward by receiving power from a gear transmission by an electric gear from a start control means disposed on the second shaft. A first friction member on a ring gear to which the power transmission member is connected and a planetary carrier connected to a plurality of pinion gears arranged at equal intervals on the inner circumference of the ring gear, and installed on a sun gear arranged at the center of the pinion gear. After applying a single pinion planetary gear set having a second friction member to the second power transmission member, a continuously variable transmission for a vehicle comprising forward and reverse control means. And a gong.

EXAMPLE

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the present invention will be described in more detail.

1 is a view showing a continuously variable transmission for a vehicle according to the present invention, Figure 2 is a block diagram of a pulley diameter displacement generating means applied to the present invention, reference numeral 1 denotes a continuously variable transmission.

The continuously variable transmission 1 is composed of a configuration including a torque converter 2, a transmission means 4, forward and reverse control means 6, and an electric gear (8).

The torque converter 2 of the continuously variable transmission 1 is a device for torque conversion by receiving power from the engine 10. The torque converter 2 includes a pump impeller 14 which rotates in direct connection with the crankshaft of the engine 10; A turbine runner 16 which is disposed in opposition to the pump impeller 14 and rotates together by oil ejected; It is comprised between the pump impeller 14 and the turbine runner 16, and the stator 18 which changes the flow of oil and increases the rotational force of the pump impeller 14 is comprised.

Accordingly, when the engine rotates, the oil filled in the torque converter 2 is ejected from the pump impeller 14, supplied to the turbine runner 16 to drive the turbine runner 16, and then flows into the stator 18. .

In addition, the oil introduced into the stator 18 changes the direction and repeats the flow of the oil into the pump impeller 14, in which the turbine runner 16 shares the turbine runner 16 by the rotation of the stator 18. There is a difference between the rotational force of (16) and the pump rotational force is the torque conversion is made.

The transmission means 4 of the continuously variable transmission 1 is configured to receive the rotational power output from the torque converter 2 by gear transmission and belt transmission to perform the stepless speed change according to the rotational speed input from both sides.

The transmission means 4 is the power is input through the output shaft 20 in which the oil pump (P) is installed.

The shift means 4 is composed of a drive pulley 22 and a driven pulley 24 to transmit power through the belt 26, which is shown in FIG.

The drive pulley 22 is composed of a fixed side pulley 28 and a variable side pulley 30, the fixed side pulley 28 is installed on the first shaft 32 connected to the output shaft 20 The variable shaft pulley 30 is coupled by a ball spline 34 to move the first shaft 32 left and right.

The casing member 36 is provided on the side of the variable side pulley 30 to form a hydraulic chamber 38 therebetween.

The hydraulic chamber 38 is capable of supplying a pressure fluid generated by the driving force of the engine through the flow passage 40 formed on the first shaft 32.

The driven pulley 24 is composed of a fixed side pulley 42 and a variable shaft pulley 44 as above, but the fixed side pulley 42 is integrally formed on the second shaft 46.

In addition, the variable side pulley 44 is determined by the ball spline 48 so as to move left and right on the second shaft 46, and the variable side pulley 44 has a casing member 50 interposed therebetween so that the hydraulic chamber 52 is formed, and the hydraulic chamber 52 can be supplied with a pressure fluid generated by the driving force of the engine through the flow path 54 formed on the second shaft 46.

The hydraulic pressure is supplied into the hydraulic chambers 38 and 52 to shift gears by changing the contact radius of the belt 26 and the pulleys 22 and 24.

In addition, an elastic member 56 is installed in the hydraulic chamber 38 to prevent slippage between the driving and driven pulleys 22 and 24 and the belt 26 so that the belt 26 and the pulleys 22 and 24 are always provided. Allow each other to transmit power without slipping.

Of course, the configuration of the drive and driven pulleys 22, 24 is not limited to the above configuration and includes those that can be easily generated from the configuration.

In addition, the electric gear 8 is connected and installed between the second shaft 46 of the transmission means 4 and the first power transmission member 58 of the forward and reverse control means 6 so as to transmit power. .

The forward and backward control means 6 of the continuously variable transmission device 1 connects the first power transmission member 58 to the electric gear 8 so that power is input to the ring gear 60.

The above-mentioned forward and backward control means 6 applies a single pinion planetary gear set, the ring gear 60 of which acts as an input element, and a plurality of pinions 62 disposed at equal intervals on the inner circumference thereof are planetary. The carrier 64 is connected.

The planetary carrier 64 is provided with a first friction member 66 in the transmission housing 68 to act as a reaction element.

In addition, the planet carrier 64 is provided with a second friction member 70, and the output of the power is made by intermittent the second power transmission member 72.

In the above, the first friction member 66 is a brake means, and the second friction member 70 may be a clutch plate.

In addition, the power of the pinion gear 62 and the sun gear 74 is output to each of the driving wheels through the second power transmission member 72 under the control of the second friction member 70.

When the sun gear 74 controls the first friction member 66, the sun gear 74 rotates in reverse to output reverse driving force.

In the continuously variable speed shift apparatus according to the present invention, when the driver selects the selector lever (not shown) as the driving D range, the second friction member 70 is operated and controlled.

Then, when the power of the output shaft 20 is input to the ring gear 60 via the transmission means 4 which shifts according to the change in the contact radius of the driving pulley 22 and the driven pulley 24, the pinion 62 and the sun gear ( 74 is rotated in an integrated state to output the forward rotational power through the second power transmission member (72).

As such, the power output through the forward and reverse control means 6 is dependent on the shift means 4, and the other shift is performed when the outer diameters of the first drive pulley 22 and the driven pulley 24 are the same. It is conceivable to divide the case where the outer diameter of the second drive pulley 22 is larger than the diameter of the driven pulley 24 and the case where the diameter of the third drive pulley 22 is smaller than the diameter of the driven pulley 24.

In the first condition, when the outer diameters of the driving and driven pulleys 22 and 24 are the same, they have a face ratio of 1: 1.

And secondly, when the outer diameter of the drive pulley 22 is larger than the diameter of the driven pulley 24, when the outer diameter of the drive pulley 22 becomes smaller than the diameter of the driven pulley 24, the rotation speed of the drive pulley 22 is reduced. Since the speed of the driven pulley 24 is smaller than that of the deceleration is made.

In this way, the driving range is gradually decelerated and increased in speed from the start point to the high speed drive without any division of the gear stage.

The change in the outer diameter of the drive pulley 22 and the driven pulley 24 is determined according to the hydraulic pressure supplied to the hydraulic chambers 38 and 52, and such hydraulic control is usually used in a continuously variable vehicle. Since it becomes possible to use it, detailed description is abbreviate | omitted.

After the shift is made by the above-described action, the output is produced by a normal power transmission device.

When the selector lever is selected as the reverse R range, the operation of the second friction member 70 is released and the operation of the first friction member 66 is performed.

Accordingly, when the ring gear 60 of the forward and backward control means 6 becomes an input element, and the planetary carrier 64 is controlled by the first friction member 66 to act as a reaction force element, the sun gear 74 Reverse rotation is made to output the driving force through the second power transmission member (72).

As described above, the forward and backward control means for generating the power forward and backward are outputted so that the vehicle can run by varying the power shifted from the shift means.

The present invention can achieve a simple structure by connecting the installation of the electric gear and the elimination of the longitudinal reduction means, by reducing the torque fluctuations by providing the forward and reverse control means in the final power transmission process, thereby reducing the transmission shock.

3 is a configuration diagram of the second embodiment according to the present invention. Instead of the coke converter 2 in the first embodiment, a toe damper 76 for reducing torsional vibration is provided, and the transmission means 4 And a starting clutch 78 are provided on the second shaft 46 for connecting and arranging the driven pulley 24 and the electric gear 8.

Since the torque shift caused by the power shift is reduced by the above-described starting clutch, the transmission is made soft and the vehicle starts smoothly, thereby improving the durability of the belt.

4 is a configuration diagram of the third embodiment according to the present invention, in which the electric gear 8 in the first embodiment is arranged after the forward and backward control means 6. In this third embodiment, the forward and reverse control means 6 are connected to the second shaft 46 of the shifting means 4, and the electric gear 8 is the second power of the forward and reverse control means 6. It is connected to the transmission member 72.

In the third embodiment, the forward and reverse control means are installed on the second shaft where the driven pulley of the shifting means are installed, and the electric gear is installed on the second power transmission member of the forward and reverse control means, thereby making the belt durable and simple. The structure can be achieved.

5 is a configuration diagram of a fourth embodiment according to the present invention. In FIG. 4, instead of the torque converter 2 in the third embodiment, a fourth damper 76 is provided to reduce torsional vibration. While the power transmission is made while the starting clutch 78 is installed on the second power transmission member 72 of the forward and backward control means 6 between the forward and reverse control means 6 and the electric gear (8). It is arranged to be done.

Accordingly, in the fourth embodiment, the starting clutch is interposed between the forward and reverse control means and the electric gear to reduce the shift shock, thereby smoothly starting, and the reduction of the number of parts as well as the reduction of the number of parts of the belt as well. It is intended to be durable.

6 is a configuration diagram of a fifth embodiment according to the present invention, wherein the first power transmission member 58 is connected to the output side 20 that transmits the rotational power output from the torque converter 2 to the forward and reverse control means 6. And the electric gear 8 are connected to the second power transmission member 72 of the forward and reverse control means 6. The shift means 4 is connected to the electric gear 8 by the second shaft 46 of the driven pulley 24.

In the fifth embodiment, the forward and reverse control means are made into a single pinion, and the longitudinal reduction means is omitted to achieve compactness to improve fuel economy and to improve design freedom.

7 is a configuration diagram of the sixth embodiment according to the present invention. Instead of the torque converter 2 in the fifth embodiment, the torsional vibration damper 76 is provided, as well as the vibration gear 55. Between the and the transmission means 4 is provided with a starting clutch 78 for reducing the shift torque and improving the fuel economy, and the invention seeks a simple structure to achieve a degree of freedom in design.

As described above, in the continuously variable transmission of the present invention, the torque converter general damper can be used to complement each other, a simple structure can be achieved, and the weight and freedom of design are improved.

As a result, the present invention described above is an invention capable of providing a continuously variable vehicle in which fuel efficiency and power performance are improved.

Claims (3)

A torsional damper installed on the output shaft of the engine to absorb the torsional vibration due to the torque variation; A belt disposed on a first shaft connected to an output shaft of the corporate damper so as to continuously vary the contact radius of the belt and the pulley and a second shaft spaced apart in parallel with the first shaft at a predetermined distance. A shifting means comprising a drive and a driven pulley; A ring gear connected to the first power transmission member disposed in parallel with the second shaft so as to receive power from the start control means disposed on the second shaft and to be driven forward by the gear transmission by the electric gear; The second friction member is provided in the second power transmission member installed in the sun gear arranged at the center of the pinion gear, having a first friction member in the planetary carrier connected to a plurality of pinion gears arranged at equal intervals on the inner circumference of the ring gear. A continuously variable transmission for a vehicle comprising a forward and reverse control means applying a set of single-pinion planetary. The driving clutch of claim 1, wherein the forward and backward control means are connected to a second shaft provided with a driven pulley of the shifting means, and the starting clutch is connected to the second power transmission member of the forward and reverse control means connected to the second shaft. Stepless transmission for a vehicle made by connecting the electric gear to output the driving force after the installation. 3. The power supply of claim 2, wherein the control means is disposed in direct connection with the first power transmission member on the output shaft of the torsional damper, and the power transmitted by the electric gear disposed on the second power transmission member of the forward and backward control means. A continuously variable transmission for a vehicle formed by connecting to a second shaft a transmission means for continuously changing while arranging a starting clutch to be controlled.