KR20100003012A - Apparatus for transmiting transmission - Google Patents

Abstract

PURPOSE: An apparatus for transmitting transmission is provided to obtain simply transmission by changing the moving sheave. CONSTITUTION: The belt pulley is wound between moving sheaves(18a,18b) and fixed sheave of the primary pulley. The primary pulley is installed on the driving shaft connected to the engine released. The belt pulley is wound between the moving sheave and fixed sheaves(20a,20b) of the secondary pulley. The secondary pulley is installed on the driven shaft(16). According to the revolution per minute, the shift control unit decides the gear transmission ratio. The speed change member(30) transfers the engine driving force of the driving shaft to the gear transmission ratio of the shift control unit through the belt pulley to the driven shaft.

Description

Transmission of continuously variable transmission {APPARATUS FOR TRANSMITING TRANSMISSION}

The present invention relates to a transmission of a continuously variable transmission. More particularly, the present invention relates to an apparatus that enables a simple transmission to be continuously shifted in accordance with a driving direction of a linear motor and a sliding direction of a wedge.

In general, the transmission that determines the appropriate reduction ratio in transmitting the output of the engine generating power to the driving wheel is classified into a manual transmission, an automatic transmission, and a continuously variable transmission. The use of automatic transmissions rather than manual transmissions is increasing in a general trend.

In the case of automatic transmissions, the adoption of continuously variable transmissions has recently been increased due to fuel consumption deterioration caused by a lot of power loss caused by various load elements in the apparatus.

The continuously variable transmission includes a primary pulley whose diameter is changed by hydraulic operation on an input shaft of power, and a secondary pulley having a diameter changed by hydraulic operation on an output shaft. By connecting the belt (Belt) or chain (Chain) to adjust the diameter between the primary pulley and the secondary pulley so that the shift to the target gear stage is made, the speed ratio can be arbitrarily set within a predetermined range of the excellent fuel economy There is a characteristic to have.

In the continuously variable transmission, the speed ratio is determined by measuring the speeds of the primary and secondary pulleys using the speed sensors of the primary and secondary pulleys or by measuring the movement of the primary and secondary pulleys. The method of measuring and calculating is applied, but the method of measuring and calculating the speed of a primary side pulley and a secondary side pulley is normally applied.

The transmission control unit (TCU) of the continuously variable transmission measures the turbine speed, the primary pulley speed, and the secondary pulley speed and actively uses it to control the transmission ratio.The turbine speed is used for the static control and the damper clutch control. The speeds of the primary pulley and the secondary pulley are used to determine the speed ratio.

Usually, the continuously variable transmission is made of a belt pulley made of metal as shown in FIG. 1 attached thereto, wherein one side of the annular belt pulley is movable to the left and right on the drive shaft 14 connected to the engine side. It is seated and wound between the sheave 18a and the fixed sheave 20a installed to face each other on the opposite side.

In addition, the opposite side of the annular belt pulley 10 is to be seated and wound between the movable sheave (18b) installed to be moved to the left and right on the driven shaft (16) and the fixed sheave (20b) facing each other on the opposite side do.

At this time, the movable sheave 18a and the fixed sheave 20a of the drive shaft 14, and the movable sheave 18b and the fixed sheave 20b of the driven shaft 16 are installed to be in diagonal directions with each other.

Therefore, when the drive shaft 14 rotates according to the driving of the engine, the moving sheave 18a of the drive shaft 14 is moved left and right according to the number of revolutions of the engine and at the same time the moving sheave of the driven shaft 16 18b also moves left and right.

At this time, the left and right movement of the movable sheave (18a, 18b) is made by a hydraulic mechanism (not shown) that varies the magnitude of the force in accordance with the engine speed.

On the other hand, when the moving sheave 18a of the drive shaft 14 moves inwardly (to the belt pulley side), the moving sheave 18b of the driven shaft 16 moves to the outside (the opposite side of the belt pulley). As a result, the following continuously variable shifts are made.

As the distance between the movable sheave 18a and the fixed sheave 20a of the drive shaft 14 approaches, one side of the belt pulley 10 therebetween is in the outer circumferential direction of the movable sheave 18a and the fixed sheave 20a. As it moves, the radius of rotation becomes larger.

On the other hand, while the distance between the movable sheave 18b and the fixed sheave 20b of the driven shaft 16 becomes farther away, the opposite side of the belt pulley 10 wound therebetween is moved between the movable sheave 18b and the fixed sheave ( 20b) is moved in the inner circumferential direction so that the radius of rotation becomes small.

As described above, the general movement of the shifting sheave of the continuously variable transmission is performed by a hydraulic mechanism, and a hydraulic pump for generating hydraulic pressure determined according to the engine speed is installed. There is a problem in that a loss occurs and the configuration of the hydraulic mechanism is very complicated, thereby increasing the manufacturing process and manufacturing cost for the continuously variable transmission.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to draw in and out linear axes in accordance with driving of a primary linear motor and a secondary linear motor under the control of the shift control unit. The withdrawal of the shaft causes the second inclined member to slide along the inclined surfaces of the first inclined member of the primary wedge and the secondary wedge, thereby moving the respective movement sheaves of the primary pulley and the secondary pulley in the direction determined according to the engine speed, respectively. The present invention provides a transmission apparatus of a continuously variable transmission that can be easily shifted without a separate hydraulic control, and has a simple configuration of a continuously variable transmission, thereby making it light and short for the continuously variable transmission.

Technical problem according to the aspect of the present invention for achieving the above object,

A belt pulley having one side wound between the movable sheave and the fixed sheave of the primary pulley installed on the drive shaft connected to the engine side, and having the opposite side wound and installed between the movable sheave and the fixed sheave of the secondary pulley installed on the driven shaft; And

And a gear shift control unit configured to determine a gear shift ratio according to an engine speed, and to determine a rotation radius of the belt pulley according to the shift ratio determined by transferring the moving sheaves of the primary and secondary pulleys.

By controlling the rotation radius of the belt pulley according to the sliding direction of the wedge determined by the draw-out of the motor driven by the shift control unit according to the control, the engine driving force of the drive shaft through the belt pulley at the gear shift ratio of the shift control unit. Characterized in that it further comprises a transmission member capable of transmitting to the driven shaft.

The shift member,

In order to vary the rotation radius of the belt pulley according to the moving direction of the moving sheave of the primary pulley and the moving sheave of the secondary pulley,

 A primary side shifting member for transferring the moving sheave of the primary side pulley in a direction determined under the control of the shift control unit;

A secondary transmission member configured to convey the moving sheave of the secondary pulley in a direction determined under the control of the shift control unit,

The primary side shift member,

 A primary side linear motor having a linear shaft which draws in and out under the control of the shift control unit generated according to the vehicle speed;

A first side inclined member having one side fixed thereto, and a second side inclined member configured to slide along the inclined surface of the first side first inclined member when the linear shaft is pulled in and out to transfer the moving sheave of the primary pulley; Including the primary side wedge,

The secondary side shift member,

A secondary-side linear motor having a linear shaft which draws in and out under control of the shift control unit generated according to the vehicle speed;

And a secondary side inclined member having one side fixed to the secondary side inclined member and a secondary side inclined member configured to slide along the inclined surface of the secondary side first inclined member when the linear shaft is pulled in and out, and to transfer the moving sheave of the secondary side pulley. And a secondary side wedge.

On the other hand, the shift member,

A primary linear motor having a linear shaft which draws in and out under the control of the shift control unit when the vehicle speed is lower than a predetermined threshold;

The primary side inclined member having one side fixed and the primary side inclined member sliding along the inclined surface of the primary side first inclined member when the linear shaft is pulled out to transfer the moving sheave of the primary pulley to the belt pulley side. Including a primary side wedge,

A secondary side linear motor having a linear shaft which draws in and out according to the control of the shift control unit;

A second inclined member having one side fixed to the second inclined member and a second inclined member which slides along the inclined surface of the second inclined first inclined member when the linear shaft is retracted to transfer the moving sheave of the secondary pulley in the opposite direction to the belt pulley side; And a primary wedge comprising the member.

In addition, the shift member,

A primary linear motor having a linear shaft that is pulled under the control of the shift control unit when the vehicle speed travels at a high speed higher than a predetermined threshold value;

A primary side in which a first side inclined member having one side fixed and the linear shaft slides along the inclined surface of the primary side first inclined member when the linear shaft is retracted to transfer a moving sheave of the primary pulley in a direction opposite to the belt pulley side; A primary side wedge comprising a second inclined member,

A secondary side linear motor having a linear shaft which is drawn out according to the control of the shift control unit;

A second inclined member having one side fixed thereto, and a second inclined member sliding along the inclined surface of the first inclined first inclined member when the linear shaft is pulled out to transfer the moving sheave of the second side pulley to the belt pulley side; And a secondary side wedge.

As described above, according to the present invention, the linear shaft is pulled in and out respectively according to the control of the shift control unit and the primary linear motor and the secondary linear motor are driven, and the primary side wedge is pulled out by the linear shaft. And the second inclined member slides according to the inclined surface of the first inclined member of the secondary side wedge to transfer the shifting sheaves of each of the primary pulley and the secondary pulley in the direction determined according to the vehicle speed, thereby shifting the gears without additional hydraulic control. The CVT is simply shifted, and thus the light and small size of the CVT can be obtained.

DETAILED DESCRIPTION In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings that illustrate preferred embodiments of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the transmission of the continuously variable transmission according to the present invention is installed on the drive shaft of the engine to transmit the rotational power of the drive shaft of the engine to the driven shaft, the primary pulley and the secondary pulley and the belt pulley. And a shift control unit (TCU) 50 for controlling the continuously variable transmission by setting the shift gear ratio in response to the engine speed.

That is, the movable sheave 18a and the fixed sheave 20a of the primary pulley are installed on the drive shaft 14 connected to the engine side, and the inner side of the movable sheave 18a and the fixed sheave 20a facing each other. Is formed to be inclined by the drive shaft 14.

Similarly, the movable sheave 18b and the fixed sheave 20b of the secondary pulley of the same shape are also provided in the driven shaft 16 which receives the rotational power of the drive shaft 14.

Accordingly, one side of the annular metallic belt pulley 10 is wound between the movable sheave 18a and the fixed sheave 20a of the drive shaft 14, and the opposite side of the belt pulley 10 is the driven shaft 16. It is wound between the moving sheave 18b and the fixed sheave 20b.

In addition, since both side surfaces of the belt pulley 10 are formed at an inclination angle in surface contact with the inclined surfaces of the movable sheaves 18a and 18b and the fixed sheaves 20a and 20b, the belt pulley 10 is formed. The inclined surfaces of the movable sheaves 18a and 18b and the fixed sheaves 20a and 20b are supported by surface contact so that the wound state is maintained at a constant tension.

On the other hand, the transmission of the continuously variable transmission according to the present invention, the moving sheave 18a and the secondary pulley of the primary pulley to control the rotation radius of the belt pulley 10 determined according to the transmission ratio determined according to the engine speed. Each of the shifting member for conveying the moving sheave 18b of the left and right direction is included.

That is, the shift member transfers the primary side shifting member 30 for conveying the moving sheave 18a of the primary pulley and the shifting sheave 18b of the secondary pulley to control the rotation radius of the belt pulley 10. The secondary side shift member 40 is included.

The primary side shift member 30 includes a primary side linear motor 32 having a linear shaft 31 which draws in and out under the control of the shift control unit 50 generated according to the engine speed. The movable sheave of the primary side pulley by sliding along the inclined surface of the primary side first inclined member 33 and the primary shaft first inclined member 33 when the linear shaft 31 is pulled in and out. It is provided with the primary side wedge which contains the primary side 2nd inclination member 35 which conveys 18a).

In addition, the secondary transmission member 40 is linear to draw in and out under the control of the shift control unit 50 in order to transfer the moving sheave 18b of the secondary pulley according to the rotation radius determined according to the engine speed. The secondary side first inclined member 43 including a secondary side linear motor 42 having a shaft 41 and having one side fixed thereto, and the secondary side first inclined member when the linear shaft 41 is pulled in and out ( And a secondary side wedge including a secondary side second inclined member 45 for sliding along the inclined surface of 43 to convey the moving sheave 18b of the secondary side pulley.

3 is a view illustrating a control state of the moving sheave of the primary pulley and the secondary pulley when the engine speed is less than a predetermined threshold, Figure 4 is a view of the primary pulley and secondary pulley shown in FIG. The rotation radius of the belt pulley according to the left and right transfer of the moving sheave.

That is, as shown in FIG. 3, the linear shaft 31 under the control of the primary linear motor 32 driven under the control of the shift control unit 50 when the engine speed is lower than the predetermined threshold. ) Is drawn out, and the primary second inclined member 35 slides toward the belt pulley 10 according to the inclined surface of the primary first inclined member 33 when the linear shaft 31 is pulled out. Is moved to the belt pulley 10 side.

At this time, the linear shaft 41 is introduced into the linear motor 42 according to the driving of the secondary-side linear motor 42, and when the linear shaft 41 is drawn in, the secondary second inclined member 45 is moved into the linear motor 42. The sliding sheave 18b of the secondary pulley is moved in the opposite direction of the belt pulley 10 by sliding in the opposite direction of the valve pulley 10 along the inclined surface of the vehicle-side first inclined member 43. Therefore, the radius of rotation of the belt pulley 10 is as shown in FIG.

5 is a view illustrating a control state of the moving sheave of the primary pulley and the secondary pulley when the engine speed is higher than a predetermined threshold value, Figure 6 is a view of the primary pulley and secondary pulley shown in FIG. The rotation radius of the belt pulley according to the left and right transfer of the moving sheave.

That is, as shown in FIG. 5, the linear shaft 31 is driven by the control of the primary linear motor 32 driven under the control of the shift control unit 50 when the engine speed is higher than the predetermined threshold. ) Is introduced, and when the linear shaft 31 is drawn in, the primary second inclined member 35 slides toward the opposite side of the belt pulley 10 according to the inclined surface of the primary first inclined member 33. The moving sheave 18a of the pulley is conveyed to the opposite side of the belt pulley 10.

At this time, the linear shaft 41 is drawn out according to the operation of the secondary linear motor 42, and the secondary second inclined member 45 is pulled out by the secondary side first inclined member when the linear shaft 41 is pulled out. The sliding sheave 18b of the secondary pulley is transferred to the belt pulley 10 side by sliding toward the valve pulley 10 side along the inclined surface of 43. Therefore, the radius of rotation of the belt pulley 10 is as shown in FIG.

According to this configuration, first, when the drive shaft 14 is rotated in accordance with the driving of the engine, the moving sheave 18a of the primary pulley is moved left and right by the first side shift member 30 in accordance with the rotation speed of the engine. At the same time, the movable sheave 18b of the secondary side pulley is also moved left and right by the secondary side shift member 40.

More specifically, when the moving sheave 18a of the primary pulley moves toward the belt pulley 10 side, the moving sheave 18b of the secondary pulley moves to the opposite side of the belt pulley 10.

That is, as the moving sheave 18a of the primary pulley moves, the distance to the fixed sheave 20a is closer, and one side of the belt pulley 10 supported and wound therebetween is fixed to the moving sheave 18a. The slide is pushed outward in the circumferential direction of the sheave 20a, thereby increasing the radius of rotation.

On the other hand, while the movable sheave 18b of the secondary pulley moves outwards, the distance from the fixed sheave 20b becomes far, and the opposite side of the belt pulley 10 wound therebetween is fixed with the movable sheave 18b. Since the sheave 20b moves in the inner circumferential direction, the radius of rotation becomes smaller.

As described above, when the rotation radius of the belt pulley 10 of the primary side pulley is large, the rotation radius of the belt pulley 10 of the secondary side pulley becomes small, thereby accelerating the shift, and conversely, the belt pulley of the primary side pulley ( When the rotation radius of 10) is small, the rotation radius of the belt pulley 10 of the secondary side pulley becomes large, and the speed change which is decelerated is made.

That is, the linear shafts 31 and 41 are drawn in and out in accordance with the driving of the primary side linear motor 32 and the secondary side linear motor 42, respectively, under the control of the shift control unit 50. Withdrawal of 31 and 41 causes the second inclined members 35 and 45 to slide along the inclined planes of the first and second inclined members 33 and 43 of the wedge and the secondary side wedges. And by shifting the shifting sheaves 18a and 18b of the secondary pulley in the direction determined according to the engine speed, respectively, the gears can be shifted easily without additional hydraulic control, and the structure of the transmission member of the continuously variable transmission is simple.

As such, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without changing to the technical spirit or essential features of the present invention. Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive. The scope of the invention is indicated by the following claims rather than the above description, and it should be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the invention. .

1 is a view showing the configuration of a typical continuously variable transmission.

2 is a view showing the configuration of a transmission of a continuously variable transmission according to the present invention.

3 is a diagram illustrating an acceleration shift operation of the shift member illustrated in FIG. 2.

4 is a view showing a radius of rotation of the belt pulley shown in FIG.

5 is a diagram illustrating a deceleration shift operation of the shift member illustrated in FIG. 2.

6 is a view showing a radius of rotation of the belt pulley shown in FIG.

<Explanation of symbols for the main parts of the drawings>

31: Primary linear shaft 32: Primary linear motor

33, 43: first inclined member 35, 45: second inclined member

41: secondary linear shaft 42: secondary linear motor

Claims (6)

A belt pulley having one side wound between the movable sheave and the fixed sheave of the primary pulley installed on the drive shaft connected to the engine side, and having the opposite side wound and installed between the movable sheave and the fixed sheave of the secondary pulley installed on the driven shaft; And And a gear shift control unit configured to determine a gear shift ratio according to an engine speed, and to determine a rotation radius of the belt pulley according to the shift ratio determined by transferring the moving sheaves of the primary and secondary pulleys. By controlling the rotation radius of the belt pulley according to the sliding direction of the wedge determined by the draw-out of the motor driven by the shift control unit according to the control, the engine driving force of the drive shaft through the belt pulley at the gear shift ratio of the shift control unit. The transmission of the continuously variable transmission further comprises a transmission member capable of transmitting to the driven shaft. The method of claim 1, wherein the shift member, In order to vary the rotation radius of the belt pulley according to the moving direction of the moving sheave of the primary pulley and the moving sheave of the secondary pulley,  A primary side shifting member for transferring the moving sheave of the primary side pulley in a direction determined under the control of the shift control unit; And a secondary transmission member for transferring the moving sheave of the secondary pulley in a direction determined under the control of the shift control unit. The method of claim 2, wherein the primary side shift member,  A primary side linear motor having a linear shaft which draws in and out under the control of the shift control unit generated according to the vehicle speed; A first side inclined member having one side fixed thereto, and a second side inclined member configured to slide along the inclined surface of the first side first inclined member when the linear shaft is pulled in and out to transfer the moving sheave of the primary pulley; A transmission for a continuously variable transmission comprising a primary side wedge. The method of claim 2, wherein the secondary side shift member, A secondary-side linear motor having a linear shaft which draws in and out under control of the shift control unit generated according to the vehicle speed; And a secondary side inclined member having one side fixed to the secondary side inclined member and a secondary side inclined member configured to slide along the inclined surface of the secondary side first inclined member when the linear shaft is pulled in and out, and to transfer the moving sheave of the secondary side pulley. A transmission for a continuously variable transmission comprising a secondary side wedge. The method of claim 1, wherein the shift member, A primary linear motor having a linear shaft which draws in and out under the control of the shift control unit when the vehicle speed is lower than a predetermined threshold; The primary side inclined member having one side fixed and the primary side inclined member sliding along the inclined surface of the primary side first inclined member when the linear shaft is pulled out to transfer the moving sheave of the primary pulley to the belt pulley side. Including a primary side wedge, A secondary side linear motor having a linear shaft which draws in and out according to the control of the shift control unit; A second inclined member having one side fixed to the second inclined member and a second inclined member which slides along the inclined surface of the second inclined first inclined member when the linear shaft is retracted to transfer the moving sheave of the secondary pulley in the opposite direction to the belt pulley side; A transmission for a continuously variable transmission comprising a primary wedge including a member. The method of claim 1, wherein the shift member, A primary linear motor having a linear shaft that pulls in according to the control of the shift control unit when the vehicle speed travels at a high speed over a predetermined threshold value; A primary side in which a first side inclined member having one side fixed and the linear shaft slides along the inclined surface of the primary side first inclined member when the linear shaft is retracted to transfer a moving sheave of the primary pulley in a direction opposite to the belt pulley side; A primary wedge comprising a second inclined member, A secondary side linear motor having a linear shaft which is drawn out according to the control of the shift control unit; A second inclined member having one side fixed thereto, and a second inclined member sliding along the inclined surface of the first inclined first inclined member when the linear shaft is pulled out to transfer the moving sheave of the second side pulley to the belt pulley side; A transmission for a continuously variable transmission comprising a secondary side wedge.

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