KR102036244B1 - Motor Vehicle Torque Converter - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle torque converter, and more particularly, to a vehicle torque converter having improved damping efficiency by controlling the position of vibration reducing means for damping vibrations and shocks in the rotational direction.

Description

Vehicle Torque Converter {Motor Vehicle Torque Converter}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle torque converter, and more particularly, to a vehicle torque converter having improved damping efficiency by controlling the position of vibration reducing means for damping vibrations and shocks in the rotational direction.

In general, the vehicle torque converter is installed between the engine and the transmission of the vehicle to transfer the driving force of the engine to the transmission using a fluid.

Torque converter increases the rate of change of torque by directing the impeller rotating by receiving the driving force of the engine, the turbine which is formed to face the impeller and rotated by oil discharged from the impeller, and the flow of oil flowing back to the impeller in the direction of rotation of the impeller And a reactor (also referred to as a 'stator').

Torque converters are equipped with lock-up clutches (also called 'damper clutches') that allow a direct connection between the engine and the transmission, as the load on the engine can decrease power transmission efficiency. The lockup clutch is disposed between the turbine and the front cover directly connected to the engine so that the rotational power of the engine can be transmitted directly to the transmission via the turbine.

This lockup clutch includes a piston that is axially movable on the turbine shaft. A torsional damper is provided that can absorb shocks and vibrations acting in the rotational direction when the lockup clutch is operated.

Fig. 1 is a half sectional view of a conventional vehicle torque converter cut in the axial direction, showing a vehicle torque converter.

Conventional torque converters have a front cover (1) connected to the crankshaft of the engine to rotate, an impeller (2) connected to the front cover (1) to rotate together, and a turbine (3) disposed at a position facing the impeller (2). And a reactor (4) located between the impeller (2) and the turbine (3) to change the flow of oil from the turbine (3) and deliver it to the impeller (2) side, and the reactor for delivering oil to the impeller side. It has the same rotation axis (center of rotation) as the front cover 1.

The torque converter is provided with a lockup clutch 5 as a means of directly connecting the engine and the transmission. The lockup clutch 5 is arranged between the front cover 1 and the turbine 3.

The lockup clutch 5 is formed in a substantially disk shape and has a piston 6 that can move in the axial direction.

And a torsional damper (7) is coupled to the lockup clutch (5). The torsional damper 7 transmits the driving force transmitted through the lockup clutch 5 to the turbine 3 to absorb the torsional force acting in the rotational direction of the shaft and to damp the vibration.

The lockup clutch 5 described above comprises a friction plate 8 arranged between the front cover 1 and the piston 6. The friction plate 8 is coupled to the friction material (8a) on both sides. Therefore, when the piston 6 moves in the direction toward the front cover 1 by the hydraulic pressure, the lockup clutch 5 is brought into close contact with the front cover 1 and the piston 6 and moves to the front cover 1. The transmitted driving force can be transmitted to the friction plate 8.

Recently, there has been known a technique in which vibration reduction means using a pendulum is applied to the torsional damper 7 to reduce vibrations and shocks generated from the torsional damper 7.

The above-described torque converter applied vibration reduction means has the advantage of reducing the vibration and shock of the torsional damper through the pendulum movement, but in recent years to reduce the vibration and impact of the vehicle to improve the emotional quality of the vehicle occupant As conditions (Needs) are further strengthened, the development of a torque converter with better vibration and shock reduction efficiency than the conventional torque converter applied vibration reduction means is required.

Republic of Korea Patent Publication No. 10-1358998 (2014.02.07.)

The present invention has been made to solve the above problems, an object of the present invention is to damp the vibration reducing means by positioning the outer side in the radial direction than the torsional damper on the basis of the rotation axis of the front cover in the vehicle torque converter, It is to provide a vehicle torque converter with improved efficiency.

The vehicle torque converter according to the present invention includes a front cover 110, a lock-up clutch 120, and an impeller 140 coupled to the front cover 110 to rotate together about a rotation axis of the front cover 110. Main member 100 to the; A turbine 200 disposed to face the impeller 140; A reactor 300 located between the impeller 140 and the turbine 200; An intermediate member 400 disposed between the front cover 110 and the turbine 200; Hub 600 for transmitting the driving force to the transmission; A first spring 510 connecting the main member 100 and the intermediate member 400; A second spring 520 positioned at an inner circumference of the first spring 510 around the rotation axis of the front cover 110 to connect the intermediate member 400 and the hub 600; And vibration reduction means 700 provided between the first torsional damper 510 and the turbine 200.

The intermediate member 400 includes a first connection member 410 coupled to the turbine 200, and the vibration reducing means 700 is coupled to the first connection member 410.

In addition, the first connection member 410 is formed by being coupled with the intermediate member 400 and the turbine 200 between the first spring 510 and the second spring 520.

In addition, the vibration reducing means 700 is provided to be coupled to the outer circumference around the rotation axis of the front cover 110 than the first spring 510.

In addition, the intermediate member 400 is coupled to the second connection member 420 formed by coupling with the main member 100 and the turbine 200, the intermediate member 400 and the vibration reduction means 700 It includes a third connection member 430 is formed.

In addition, the vibration reducing means 700 is coupled to be located on the inner circumference of the second connecting member 420 around the rotation axis of the front cover 110.

In addition, the vibration reducing means 700 is provided to be coupled to the outer circumference around the rotation axis of the front cover 110 than the first spring 510.

The torque converter for a vehicle according to the present invention has the advantage of improving the fuel efficiency of the vehicle through improving the damping efficiency by placing the vibration reducing means radially outward from the torsional damper with respect to the rotation axis of the front cover.

1 is a schematic cross-sectional view of a conventional vehicle torque converter
2 is a schematic cross-sectional view of a vehicle torque converter according to a first embodiment of the present invention;
3 is another schematic cross-sectional view of a vehicle torque converter according to a first embodiment of the present invention;
4 is a schematic cross-sectional view of a vehicle torque converter according to a second embodiment of the present invention;
5 is another schematic cross-sectional view of a vehicle torque converter according to a second embodiment of the present invention;
6 is a view showing an embodiment of the vibration reducing means according to the first and second embodiments of the present invention;

Hereinafter, a vehicle torque converter according to the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>

2 is a schematic cross-sectional view of a vehicle torque converter according to a first embodiment of the present invention, and FIG. 3 is another schematic cross-sectional view of a vehicle torque converter according to a first embodiment of the present invention.

2 and 3, in the vehicle torque converter 1000 according to the first embodiment of the present invention, the intermediate member 400 is connected to the main member 100 and the hub 600 through the torsional damper 500. As a twin damper type connected, the main member 100, the turbine 200, the reactor 300, the intermediate member 400, the tonic damper 500, the hub 600 and the vibration which are largely coupled with the crank shaft of the engine Reduction means 700 is included.

The main member 100 includes a front cover 110, a lockup clutch 120, a piston 130, an impeller 140, and the like.

The front cover 110 is connected to the crankshaft of the engine and is formed to be rotatable in the circumferential direction with a rotational axis that is the center of rotation, and the impeller 140 is coupled with the front cover 110 together with the front cover 110. Is rotated. In addition, the impeller 140 includes a plurality of blades.

The lockup clutch 120 is a means for directly connecting the engine and the transmission. The lockup clutch 120 may be formed in a disc shape and may include a piston 130 that may move in the direction of the rotation axis of the front cover 110.

The turbine 200 is positioned to face the impeller 140 and includes a plurality of blades facing the blades of the impeller 120, and rotates in response to the rotation of the impeller 120, thereby driving the hub 600. Passes through the transmission.

The reactor 300 is positioned between the impeller 140 and the turbine 200 to control the flow of oil coming from the turbine 120 side to be transferred to the impeller 140 side, and is also referred to as a stator.

At this time, the reactor 300 for transmitting the oil to the impeller 140 has the same rotation center (rotation shaft) as the front cover 110.

The intermediate member 400 is disposed between the front cover 110 and the turbine 200 and is connected to the main member 100 and the turbine 200.

The torsional damper 500 is coupled to the main member 100 or the intermediate member 400 to transmit a driving force, and is provided to absorb the shock and vibration acting in the rotational direction, more specifically the lockup clutch ( The torque transmitted through the 120 is transmitted to the turbine 200 to absorb the torsional force acting in the rotational direction of the shaft and to attenuate the vibration.

In this case, the torsional damper 500 includes a first spring 510 and a second spring 520. The first spring 510 connects the main member 100 and the intermediate member 400, and the second spring 520 connects the intermediate member 400 and the hub 600 for transmitting the driving force to the transmission.

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The hub 600 is connected to the second spring 520 and can transfer the driving force transmitted to the second spring 520 to the transmission.

In the vehicle torque converter 1000 according to the present invention having the above-described configuration, when the engine operates, the impeller 140 coupled with the front cover 110 and the front cover 110 rotates. As the impeller 140 rotates, oil is extruded along the blades and walls of the impeller 140 toward the turbine 200, whereby the turbine 200 is rotated, and the reactor 300 is the impeller 140 and the turbine 200. The operation stops when the rotation speed difference is large. Therefore, the direction of the oil is changed and the rotation of the impeller 140 is accelerated, thereby increasing the rotation torque.

When the rotation of the turbine 200 is accelerated, the reactor 300 revolves so as not to disturb the flow of oil, so that the rotational torque of the impeller 140 is transmitted to the turbine 200 as it is.

When the rotational speed of the turbine 200 is increased to satisfy the selected condition, the lockup clutch 120 operates to mechanically transfer the force transmitted to the front cover 110 to the hub 600 through the torsional damper 500. In this case, the torsional damper 500 absorbs a change in torque transmitted from the front cover 110 to the hub 600.

The vibration reducing means 700 may be connected to the intermediate member 400 to reduce vibration and shock generated from the torsional damper 500, and the vibration reducing means 700 may be coupled to the first spring 510 and the turbine. Is provided between the (200) can reduce the vibration and shock generated by the tonic damper (500).

At this time, the vibration reducing means 700 is a pendulum that is moved by the centrifugal force is arranged to act as a mass body, thereby acting as a pendulum damper that absorbs vibration and shock in the rotational direction of the tonic damper 500.

An example of the vibration reducing means 700 formed of a pendulum damper may include a support plate 710, a pendulum 720, and a coupling pin 730, as shown in FIG. 6.

The support plate 710 is formed in a circular shape, the pendulum 720 is disposed on one side or both sides of the support plate 710, the coupling pin 730 the support plate while changing the position of the pendulum 720 in accordance with the centrifugal force 710.

As described above, in the vehicle torque converter 1000 according to the first embodiment of the present invention, the torque transmission order is the lockup clutch 120, the torsional damper 500, the vibration reducing means 700, and the turbine 200. Is placed.

Through this, the vibration and shock are absorbed through the vibration reducing means 700 in the rotation direction of the torsion damper 500, in particular, the first spring 510, and the turbine 200 receives the force transmitted to the front cover 110. ) Can be delivered.

To describe the vibration reduction means 700 in more detail, the intermediate member 400 includes a first connection member 410 coupled to the turbine 200, and the first connection member 410 includes vibration reduction means. 700 is combined.

In this case, the first connection member 410 is formed by being coupled with the intermediate member 400 and the turbine 200 between the first spring 510 and the second spring 520, the vibration reducing means 700 is the first By being provided in the connecting member 410, the vibration reducing means 700 is positioned between the first spring 510 and the turbine 200, so as to absorb the vibration and shock from the torsional damper 500.

That is, the torsional damper 500 is coupled to the main member 100 at the inner side (engine direction) of the vibration reducing means 700, and the vibration reducing means 700 is the outer side (transmission direction) of the torsional damper 500. Is placed on. In other words, when the main member 100 and the tonic damper 500 are coupled, the vibration reducing means 700 does not need to be avoided and coupled, thereby eliminating the avoidance configuration.

This has the advantage of simplifying the configuration of the vehicle torque converter.

In this case, the first connection member 100 is coupled to the vibration reducing means 700 such that the vibration reducing means 700 is positioned in the radial direction with respect to the first spring 510 about the rotation axis of the front cover 110. Can be. In addition, the vibration reducing means 700 may be coupled to the vibration reducing means 700 in a radially outward direction from the first spring 510 about the rotation axis of the front cover 110. (See Figure 3)

That is, in the vehicle torque converter 1000 according to the first embodiment of the present invention, the vibration reducing means 700 is disposed between the first spring 510 and the turbine 200 in the longitudinal direction of the rotation axis of the front cover 100. In addition, the positional movement in the radial direction about the rotation axis of the front cover 110 is less limited than the conventional vehicle torque converter.

Through this, the vibration reducing means 700 in the radial direction from the center of the rotation axis of the front cover 110, or the same position as the first spring 510, or may be provided in the radial direction outward, such as a conventional vehicle torque Compared to the converter has a configuration that can receive more centrifugal force due to rotation.

This has the advantage that the initial force, the maneuverability of the vibration reducing means 700 is improved to increase the damping effect, thereby improving reliability and stability.

In addition, the torsional damper 500 including the first spring 510 and the second spring 520 has an input element and an output element, and the input element of the torsional damper 500 becomes the main member 100. The output element may be the hub 600. In detail, an input element of the first spring 510 may be a main member 100, and an output element may be an intermediate member 400.

The input element of the second spring 520 may be the intermediate member 400 and the output element may be the hub 600.

In this case, the input element of the second spring 520 and the output element of the first spring 510 may be connected in a non-rotable manner.

That is, the first spring 510 and the second spring 520 is a subject that rotates relative between the input element of the second spring 520 and the output element of the first spring 510 through a damper or other power transmission member. No member can also operate.

Second Embodiment

4 is a schematic cross-sectional view of a vehicle torque converter according to a second embodiment of the present invention, and FIG. 5 is another schematic cross-sectional view of a vehicle torque converter according to a second embodiment of the present invention.

4 and 5, the vehicle torque converter 1000 according to the second embodiment of the present invention is a turbine damper type, and an input element of the first spring 510 is a main member including a turbine 200. 100), and the output element is the middle member (400).

The input element of the second spring 520 may be the intermediate member 400 and the output element may be the hub 600.

In the vehicle torque converter 1000 according to the second embodiment of the present invention, the torque transmission order is arranged in the order of the lock-up clutch 120, the tonic damper 500, the vibration reducing means 700, and the turbine 200.

Through this, vibration and shock are absorbed through the vibration reducing means 700 in the direction of rotation of the damper 500, in particular, the first spring 510, and the turbine 200 receives the force transmitted to the front cover 110. Can be delivered as

The vehicle torque converter 1000 according to the second embodiment of the present invention includes a second connection member 420 connecting the main member 100 and the turbine 200, and the intermediate member 400 includes the intermediate member 400. And a third connection member 430 connecting the vibration reducing means 700.

At this time, since the second connection member 420 is to be coupled with the main member 100 and the turbine 200, the first spring 510 and the vibration reducing means 700 on the outer periphery of the rotation axis of the front cover 110 It is formed to be positioned, the vibration reducing means 700 is coupled to the third connection member 430 to be located in the inner circumference than the second connection member 420 around the rotation axis of the front cover 110.

That is, the vibration reducing means 700 is provided in combination with the third connection member 430, the second connection member 420 is located on the outer peripheral surface for coupling between the main member 100 and the turbine 200, torque In order to prevent an increase in the size of the converter, it is preferable to be coupled to the third connection member 430 so as to be located on the inner circumference of the front cover 110 from the second connection member 420.

In addition, the vibration reducing means 700 of the vehicle torque converter 1000 according to the second embodiment of the present invention, while avoiding the interference with the second connection member 420 as much as possible, the rotation axis of the front cover 110 It is preferable to couple with the third connection member 430 to be located outside the first spring (510).
At this time, the third connection member 430 is formed to extend in parallel with the rotation axis of the front cover 110 in the direction of the turbine 200 in the outer circumference of the intermediate member 400, the vibration reduction means in the radially inner direction around the rotation axis 700 may be supported. (See Figure 4)
In addition, the third connection member 430 is formed to extend in parallel with the rotation axis of the front cover 110 in the turbine 200 direction at the middle of the intermediate member 400, the vibration reducing means radially outward about the rotation axis 700 may be supported. (See Figure 5)

By doing so, as in the torque converter 1000 for charging according to the first embodiment, the structure has a configuration capable of receiving more centrifugal force due to the rotation of the front cover 110 than the vibration reducing means provided in the conventional torque converter. In the initial start-up, it is preferable that not only the damping effect is increased by increasing the maneuvering force of the vibration reducing means 700, but also through this, reliability is improved and stability is increased.

The present invention is not limited to the above-described embodiments, and the scope of application is not limited to those of ordinary skill in the art without departing from the gist of the present invention as claimed in the claims. Of course, various modifications are possible.

1000: Car Torque Converter
100: main member
110: front cover 120: lockup clutch
130: piston 140: impeller
200: turbine
300 reactor
400: middle member
410: first connection member 420: second connection member
430: third connection member
500: torsional damper
510: first spring 520: second spring
600: Hub
700: vibration reduction means
710: support plate 720: pendulum
730: coupling pin

Claims (7)

A main member (100) including a front cover (110), a lock-up clutch (120), and an impeller (140) coupled with the front cover (110) to rotate together around a rotation axis of the front cover (110);
A turbine 200 disposed to face the impeller 140;
A reactor (300) located between the impeller (140) and the turbine (200);
An intermediate member 400 disposed between the front cover 110 and the turbine 200;
Hub 600 for transmitting the driving force to the transmission;
A first spring 510 connecting the main member 100 and the intermediate member 400;
A second spring 520 positioned at an inner circumference of the first spring 510 around the rotation axis of the front cover 110 to connect the intermediate member 400 and the hub 600; And
In the torque converter for a vehicle comprising a; vibration reduction means 700 is arranged to move the pendulum by centrifugal force,
The vehicle torque converter,
It includes a second connecting member 420 connecting the main member 100 and the turbine 200,
The middle member 400,
The vehicle torque converter comprising a third connection member (430) for connecting the vibration reducing means (700).
The method of claim 1,
The third connection member 430,
The vehicle torque converter, characterized in that for connecting the vibration reducing means 700 so that the vibration reducing means 700 is located on the inner circumference of the second connection member 420 around the rotation axis of the front cover 110. .
The method of claim 2,
The third connection member 430,
Vehicle torque, characterized in that for connecting the vibration reducing means 700 so that the vibration reducing means 700 is located radially outward from the first spring 510 around the rotation axis of the front cover 110. Converter.
The method of claim 3,
The third connection member 430,
It is formed in the outer periphery of the intermediate member 400 in parallel to the rotation axis of the front cover 110 in the direction of the turbine 200, the vibration reducing means 700 in the radially inward direction around the rotation axis A torque converter for a vehicle, characterized in that supported.
The method of claim 3,
The third connection member 430,
It is formed in the middle of the middle member 400 extends in parallel with the rotation axis of the front cover 110 in the turbine 200 direction, the vibration reducing means 700 in the radially outward direction around the rotation axis A torque converter for a vehicle, characterized in that supported. delete delete

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