KR200189175Y1 - Cvt for vehicle - Google Patents

Abstract

To provide a continuously variable transmission for a vehicle capable of carrying out the continuously variable transmission with a simple configuration;

A torque converter arranged at an output end of the engine to convert torque of the rotational power output;

A forward and reverse rotation control input means disposed on a first shaft directly connected to the torque converter to transfer rotational power for selectively controlling forward and reverse rotation;

A driving pulley disposed at the end of the first shaft, a driven pulley disposed on a second shaft disposed parallel to the first shaft at a predetermined interval, and a belt connecting the driving and driven pulleys to each other; Stepless speed change means for continuously inputting rotational power of the shaft to the second axis;

Forward and reverse rotation control means for forward and reverse rotation control of the rotational power input from the continuously variable speed according to the rotation speed input from the forward and reverse rotation control input means;

It provides a continuously variable transmission for a vehicle comprising a.

Description

Stepless Transmission for Vehicles

The present invention relates to a continuously variable transmission for a vehicle, and more particularly, to a continuously variable transmission for improving the durability and reducing the manufacturing cost by performing a continuously variable transmission in a simple configuration.

The transmission of the vehicle has a function of transmitting driving wheels to the driving force of the engine. The transmission includes a manual transmission in which the driver directly selects a shift stage at the driver's will, and automatically shifts according to the driving conditions of the vehicle. The automatic transmission is classified into a continuously variable transmission in which stepless continuous shifting is performed without a specific shifting area between the respective gear stages.

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 and The method using the diameter displacement of the pulley mounted on the output shaft is mainly used.

However, in forming the continuously variable transmission as described above, in addition to the continuously variable transmission means using only the variable pulley of the belt and the command, it is possible to control forward and reverse rotation as a separate double-pinion planetary gear set, thereby making the configuration very complicated. There is a problem that the manufacturing cost of the set will increase significantly.

Therefore, the present invention has been devised to solve the above problems, and an object of the present invention is to provide a continuously variable transmission for a vehicle to improve the durability and reduce the manufacturing cost by simply performing a continuously variable configuration.

In order to realize this, the present invention, a torque converter for converting the torque of the rotational power that is disposed at the output end of the engine, and is disposed on the first axis directly connected to the torque converter, and selectively controls the forward and reverse rotation Forward and reverse rotation control input means comprising a drive gear connected via the first shaft and the first friction member to transmit power, and a second friction member variably connecting the drive gear to the transmission housing; A driving pulley disposed at the end of the first shaft, a driven pulley disposed on a second shaft disposed in parallel with the first shaft at a predetermined interval, and a belt connecting the driving and driven pulleys to each other. Stepless speed change means for varying the diameter of the pulley to continuously change the rotational power of the first shaft to input to the second axis, and the forward and reverse rotation control It consists of four pinions to control the rotational power input from the continuously variable transmission means according to the rotational speed input from the input means, the reverse rotation, the drive pinion of the pinions are connected to each other axis, the drift gear to the right side It is driven, its driven gear is connected to the drive gear of the forward and reverse rotation control input means via the idling gear, one pinion of the side pinion is connected to the second shaft end, the other pinion is A third shaft is connected to the output shaft, and the third shaft provides a continuously variable transmission for a vehicle including forward and reverse rotation control means mounted to the output gear.

1 is a block diagram of a first embodiment according to the present invention.

2 is a cross-sectional view of the continuously variable transmission means applied to the present invention.

Figure 3 is an analysis of the forward, reverse rotation control means applied to the present invention.

4 is a block diagram of a second embodiment according to the present invention.

* Explanation of symbols for main parts of the drawings

4: Torque converter 14: Forward, reverse rotation control input means

18, 24: 1st, 2 friction member 16: continuously variable transmission means

28, 30: driven and driven pulley 32: belt

54: forward and reverse rotation control means 56, 58, 60, 62: pinion

70: output gear

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention capable of realizing the above object in detail as follows.

1 is a configuration diagram of the continuously variable transmission according to the present invention, and the rotational power generated from the engine 2 is torque converted by the torque converter 4 which is an oscillation means, and is transmitted through the first shaft 6.

The torque converter 4 is a pump impeller 8 which rotates in direct connection with the crankshaft of the engine 2 and a turbine runner 10 which rotates together by oil which is disposed to face the pump impeller 8 and is ejected. And a stator 12 disposed between the pump impeller 8 and the turbine runner 10 to change the flow of oil to increase the rotational force of the pump impeller 8.

Accordingly, when the engine rotates, the oil filled in the torque converter 4 is supplied from the pump impeller 8 to the ejection door turbine runner 10 to drive the turbine runner 10 and then flow into the stator 12. .

In addition, the oil introduced into the stator 12 changes the direction and repeats the flow of the oil into the pump impeller 8, in which the turbine runner shared by the stator 12 is rotated by the rotation of the stator 12. There is a difference between the rotational force of 10) and the rotational force of the pump, which is the torque conversion.

The rotational power output through the torque converter 4 is input to the forward and reverse rotation control input means 14 and the continuously variable transmission means 16 disposed on the first shaft 6.

In the above, the forward and reverse rotation control input means 14 rotates and stops the drive gear 20 and the drive gear 20 connected through the first shaft 6 and the first friction member 18. It comprises a second friction member 24 which is variably connected to the transmission housing 22 to give.

Accordingly, when the first friction member 18 is operated, the drive gear 20 rotates in the forward direction. When the second friction member 24 is operated, the drive gear 20 is fixed and the forward and reverse rotation control described later. To control the means.

In the above, the first friction member 18 may use a multi-plate clutch as the clutch means, and the second friction member may use a known band brake as the brake means.

In addition, the continuously variable transmission means 16 disposed on the first shaft 6 and the second shaft 26 disposed at a predetermined interval thereon is disposed on the first shaft 6 and the second shaft 26. Drive and driven pulleys (28) and (30) disposed in each of the two pulleys (28), and the belt (32) interconnecting the pulleys (30).

Drive and driven pulleys 28 and 30 in the above it is possible to perform the shifting operation while the outer diameter is changed by the hydraulic pressure generated by the driving force of the engine 2, Figure 2 configuration of an embodiment that makes it possible Is showing.

That is, the driving pulley 28 is composed of a fixed side pulley 34 and a variable side pulley 36, the fixed side pulley 34 is formed integrally with the first shaft 6, the variable side pulley 36 ) Is coupled in a state capable of moving left and right on the first shaft (6).

A casing member 38 is provided on the side of the variable side pulley 36 to form a hydraulic chamber 40 therebetween, and the hydraulic chamber 40 passes through a flow passage 42 formed in the first shaft 6. The pressure fluid generated by the driving force of the engine can be supplied.

And the driven pulley 30 is composed of a fixed side pulley 44 and a variable side pulley 46 as described above, the fixed side pulley 44 is formed integrally on the second shaft (26).

In addition, the variable side pulley 46 is coupled to move left and right on the second shaft 26, the variable side pulley 46 is provided with a casing member 48 to form a hydraulic chamber 50, The hydraulic chamber 50 can be supplied with a pressure fluid generated by the driving force of the engine through the flow path 52 formed on the second shaft 26.

Of course, the configuration of the drive and driven pulleys 28, 30 is not limited to the above configuration, but includes all that can be easily devised from the configuration.

The continuously variable transmission means 16 made as described above performs the stepless speed change according to the diameter change of the driving pulley 28 and the driven pulley 30 by the rotational power input from the first shaft 6, wherein the stepless speed change condition is First, when the outer diameters of the driving pulley 28 and the driven pulley 30 are the same, and the second outer diameter of the driving pulley 28 is larger than the diameter of the driven pulley 30, and the third driving pulley 28 It can be considered to divide into the case where the diameter is smaller than the diameter of the driven pulley 30.

In the first condition, when the outer diameters of the driving and driven pulleys 28 and 30 are the same, the transmission ratio is 1: ㅂ.

And secondly, if the outer diameter of the drive pulley 28 is larger than the diameter of the driven pulley 30, the rotation speed of the driven pulley 30 is larger than the rotation speed of the drive pulley 28, so that the speed is increased, and the third drive pulley When the outer diameter of 28 is smaller than the diameter of the driven pulley 30, the rotation speed of the drive pulley 28 becomes smaller than the rotation speed of the driven pulley 30, thereby decelerating.

The driving range is input to the forward and reverse rotation control means 54 while making a gradual shift without a division of the gear stage from the starting point to the high speed driving.

The forward and reverse rotation control means 54 receives the rotational power input from the continuously variable transmission means 16 and outputs the forward or reverse rotation according to the rotational power input from the forward and reverse rotation control input means 14. This is done.

For this purpose, the forward and reverse rotation control means 54 is composed of four pinions 56, 58, 60, and 62, as known bevel differential gears. 56, 60 are connected to each other by the shaft 64, the outside of the driven gear 66 is mounted, the driven gear 66 is the positive and reverse through the idling gear 68 It is connected to the drive gear 20 of the rotation control input means (14).

One pinion 58 of the side pinions 58 and 62 is connected to an end of the second shaft 26, and the other pinion 62 is connected to a third shaft 72 which is an output shaft. At the distal end of the third shaft 72, the output gear 70 is mounted.

In FIG. 1, the output gear 70 is gradually engaged with the transfer driven gear (not shown) to omit a structure for transmitting power to the differential device through the final reduction gear, and such a structure may be used. Since the structure of the present invention can realize the object intended by any structure, the description thereof will be omitted.

Referring to the operation relationship of the forward and reverse rotation control input means 54 as described above in the lever analysis method, as shown in FIG. 3, the first pin N1 on the lever L is the side pinion 58, which is an input element. The driving pinion 56 which is the reaction force or the second input element for the second node N2 and the side pinion 62 which is the output element for the third node N3 are set.

Accordingly, the input S2 is input to the drive pinion 56 by the operation of the first friction member 18 of the forward and reverse rotation control input means 14 while being input from the continuously variable transmission means 16. Bar will be made, the output (D) of the forward rotation is made in a state of direct connection.

In contrast to the above, when the second friction member 24 of the forward and reverse rotation control input means 14 is operated to stop the drive gear 20, the drive pinion 56 is connected to the reverse direction while the drive pinion 56 operates as a reaction force element. Rotation is the output (R) is made.

4 shows a second embodiment according to the present invention, in which the forward and reverse rotation control means 54 is driven by the torque pulley 4 of the torque converter 4 and the continuously variable transmission means 16 on the first shaft 6. 28, and the forward and reverse rotation control input means 14 is disposed between the driven pulley 30 and the output gear 70 of the continuously variable transmission means 16, the operation thereof is the first embodiment It is the same as, so it is omitted

As described above, the continuously variable transmission of the present invention is a useful design to improve the durability and reduce the manufacturing cost by performing the continuously variable transmission in a simple configuration.

Claims (2)

The first shaft and the first shaft and the torque converter for converting the torque of the rotational power output and disposed at the output of the engine, and on the first side directly connected to the torque converter to selectively control the forward and reverse rotations and to transmit the rotational power. 1, forward and reverse rotation control input means composed of a second friction member for variably connecting the drive gear of the drive gear connected via a friction member roll to the transmission housing, and a drive pulley disposed at the first end portion; A driven pulley disposed on a second shaft disposed in parallel with the first shaft at a predetermined interval, and a belt connecting the driving and driven pulleys with each other to change the diameter of the pulley by hydraulic pressure to rotate the first shaft. Stepless speed change means for continuously inputting power to the second axis and rotation speed input from the forward and reverse rotation control input means. According to the rotational power input from the continuously variable transmission means, it consists of four pinions, the drive pinion of the pinion is connected to each other side and the driven gear is mounted on the outside thereof, the driven gear thereof It is connected to the drive gear of the forward and reverse rotation control input means through the idling gear, one pinion of the side pinion is connected to the end of the second shaft and the other pinion is connected to the third shaft, which is an output shaft, Endless speed change gear for a vehicle comprising a forward and reverse rotation control means mounted to the output gear at the tip of the third shaft. The method of claim 1, wherein the forward and reverse rotation control means is disposed on an axis connecting the torque converter and the drive pulley of the continuously variable transmission means, and the forward and reverse rotation control input means is used to drive the driven pulley and the output gear of the continuously variable transmission means. Continuously variable transmission for the vehicle, characterized in that disposed on the connecting shaft.