KR101129671B1 - Torque converter for vehicle having dual damper structure - Google Patents

Abstract

The present invention discloses a torque converter for a vehicle having a double damper structure that increases the torsion angle and realizes low rigidity while improving the vibration absorption capability while maintaining the existing space in which the damping clutch is accommodated.

The vehicle torque converter having a double damper structure of the present invention is a torque converter including a torsional damper, the torsional damper is connected to the lock-up clutch in the rotational direction of the first drive plate, the first drive plate to receive the rotational force A plurality of outer springs with reaction force acting elastically to support the outer springs, rotated under the driving force of the outer springs, and a pair of retaining plates and retaining plates coupled to the turbine to press the first drive plate A plurality of inner springs arranged in the circumferential direction on the inner circumferential side of the second drive plate, the second drive plate is disposed on the inner circumferential side of the first drive plate to receive the driving force transmitted by the inner springs to transmit to the transmission input shaft.

Torque, converter, drive, inertia, damper clutch, torsion angle

Description

Torque converter for vehicle having dual damper structure

The present invention relates to a torque converter for a vehicle having a double damper structure, and more particularly, to maintain a conventional space in which a damping clutch is accommodated, to increase a torsion angle and to realize a low rigidity. The present invention relates to a vehicle torque converter.

In general, the torque converter is installed between the engine of the vehicle and the transmission to transmit the driving force of the engine to the transmission using a fluid. The torque converter is a reactor that receives a driving force of the engine and rotates the impeller rotating, the turbine rotated by the oil discharged from the impeller, and the oil flowing back to the impeller in the direction of rotation of the impeller to increase the torque change rate ( Also known as a "status").

Torque converters are equipped with a lock-up clutch (also called a 'damper clutch'), a means of 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 front cover and the turbine directly connected to the engine so that the rotational power of the engine can be transmitted directly to the turbine.

This lockup clutch includes a piston that is axially movable on the turbine shaft. And the piston is coupled to the friction material in friction contact with the front cover. And the piston is coupled to the torsional damper (Torsional damper) that can absorb the shock and vibration acting in the rotational direction of the shaft when the friction material is coupled to the front cover.

7 is a diagram illustrating a power transmission process of a torque converter having a general torsional damper.

When the lockup clutch L / U is not operated, the driving force of the engine E is transmitted to the front cover 101 and the impeller 103 and is transmitted to the input shaft 107 of the transmission T through the turbine 105. Can be delivered.

When the lockup clutch L / U is operated to directly transmit the driving force of the engine to the transmission T, the driving force of the engine E is transmitted to the torsional damper 109 through the lockup clutch L / U. It absorbs shock and vibration acting in the direction of rotation. Then, the driving force of the engine is transmitted to the input shaft 107 of the transmission T through the turbine 105 axis.

Such a conventional torque converter needs to improve the vibration absorption capacity by increasing the torsion angle in a limited space and realizing low rigidity, but there is a problem in that it is not sufficiently satisfied.

Therefore, the present invention has been proposed to solve the above problems, an object of the present invention is to increase the torsion angle and to achieve low rigidity without increasing the space in which the existing damper is installed vibration absorption acting in the direction of rotation It is to provide a vehicle torque converter having a double damper structure that can improve the capability.

In order to achieve the object as described above, the present invention, the front cover, the impeller coupled to the front cover to rotate together, the turbine disposed in a position facing the impeller, the turbine located between the impeller and the turbine A reactor for directly connecting the front cover and the turbine, the lockup clutch having a piston moving by the pressure of oil to the front cover side, a torsional damper coupled to the lockup clutch The torsional damper may include: a first drive plate connected to the lockup clutch and receiving rotational force, a plurality of outer springs in which reaction force acts in a rotational direction of the first drive plate, and elastically supporting the outer springs Driving force of the outer spring A pair of retaining plates that are transmitted and rotated and coupled to the turbine, a plurality of inner springs arranged in a circumferential direction on the inner circumferential side of the first drive plate and elastic force is pressed by the retaining plate, and the first drive plate It is disposed on the inner circumferential side of the to provide a vehicle torque converter having a double damper structure including a second drive plate for receiving the driving force transmitted by the inner springs to transmit to the transmission input shaft.

Preferably, the first drive plate has an outer circumferential surface thereof bent in the axial direction such that a tip portion thereof is fitted to the core plate of the lockup clutch.

Preferably, the retaining plate is provided with a first stopper which connects the paired plates to each other and at the same time limits the movement of the first drive plate.

Preferably, the retaining plate is provided with a second stopper for limiting relative movement with the second drive plate.

The second stopper is arranged to be spaced apart in the rotational direction in the second drive plate in the rotational direction has a section that operates in the reverse direction and a section that operates in the forward direction when the damper is operated, the angle in which the damper is operated in the forward direction is operated in the reverse direction It is preferable to make it larger than the angle to become.

The inner springs preferably consist of a double spring with further springs provided therein.

The outer springs are preferably arranged in pairs of two in series.

In the present invention, the driving force transmitted through the first drive plate is transmitted to the outer spring and the driving force transmitted to the outer spring is transmitted through the retaining plate, wherein the turbine acts as a mass body to absorb vibration and retain by virtue of inertia. The plate transmits the driving force to the inner spring and the inner spring has the connecting structure to transmit the driving force to the second drive plate, thereby increasing the torsion angle and realizing low rigidity without further changing the space, thereby improving vibration absorption ability. It is effective to let.

In particular, the present invention is the outer spring is arranged in pairs of the lock-up operation section and the inner spring is applied after the vibration and shock in the rotational direction is primarily absorbed through the technology configured to operate the outer spring and the inner spring in series It has the effect of realizing low rigidity through the structure absorbed secondarily during operation and at the same time increasing the torsion angle significantly.

In addition, the present invention is made of a structure in which the torsion angle of the damper is larger than the torsion angle operated in the reverse direction when the damper is operated in the forward direction has the effect of improving the vibration absorbing power to further improve the marketability of the torque converter. .

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

1 is a configuration diagram illustrating a power transmission process of a double damper to which an embodiment of the present invention is applied.

The double damper has a structure in which a first damping part K1 is connected to the lockup clutch 14 and a turbine 8 is connected to the first damping part K1. A second damping portion K2 is connected to the turbine 8 and connected to the input shaft 21 of the transmission T.

That is, in the double damper, when the lockup clutch 14 is not operated, the driving force of the engine E may be transmitted to the front cover 4 and the impeller 6, and the driving force transmitted to the impeller 6 is the turbine 8. ) Is transmitted to the second damping portion K2 of the torsional damper, and is then transmitted to the input shaft 21 of the transmission T.

When the lockup clutch 14 is operated, the double damper transmits the driving force of the engine E to the lockup clutch 14 through the front cover 4, and the driving force transmitted to the lockup clutch 14 is controlled by the torsional damper. It is transmitted to the turbine through the first damping unit (K1), the turbine acts as a mass body, is transmitted to the second damping unit (K2), and then continues to be transmitted to the input shaft 21 of the transmission (T).

At this time, the vibration and shock in the rotation direction are sequentially absorbed while passing through the first damping portion K1 and the second damping portion K2, and the turbine serves as a mass body, thereby maximizing the vibration damping effect by the inertial force.

2 is a cross-sectional view of the torque converter to which the above-described double damper structure is applied in an axial direction.

The torque converter of the present invention is disposed at a position facing the impeller 6 and the impeller 6, which are connected to the crankshaft on the engine side and rotated, connected to the front cover 4, and rotated together. Turbine 8 and a reactor 10 (also referred to as a "stator") located between the impeller 6 and the turbine 8 to redirect the flow of oil from the turbine 8 to the impeller 6 side. do. The reactor 10 delivering oil to the impeller 6 side has the same center of rotation as the front cover 4. And the lockup clutch 14 used as a means for directly connecting the engine and the transmission is disposed between the front cover 4 and the turbine (8).

The lockup clutch 14 is formed in a substantially disk shape and has a piston 16 that can move in the axial direction. One side of the piston 16 is provided with a piston drive plate 31 disposed on the same axis as the piston 16. The piston drive plate 31 is engaged by the piston 16 and the leaf springs and used to press the piston 16 to the front cover 4 side. This lockup clutch 14 structure can be applied to large engines that require large torque.

The friction material assembly 33 is disposed between the piston 16 and the front cover 4. In the friction material assembly 33, a core plate 35 made of a donut-shaped plate is disposed at the center thereof, and the first friction material 37 and the second friction material 39 are coupled to both surfaces of the core plate 35.

That is, the friction material assembly 33 has a structure having friction materials 37 and 39 on both surfaces thereof, and can be applied to an engine requiring a large torque.

The core plate 35 described above is provided with grooves (not shown) at regular intervals on the outer circumferential surface. Through the groove of the core plate 35 is coupled to the torsional damper to be described later to absorb the rotational shock.

In addition, the lockup clutch 14 has a torsional damper 20 that absorbs the torsional force acting in the rotational direction of the shaft and attenuates vibration when the friction materials 37 and 39 are in close contact with the front cover 4. Is combined.

As shown in FIGS. 2 to 4, the torsion damper 20 includes a first drive plate 41, an outer spring 43, a pair of retaining plates 45 and 47, and an inner spring ( 49, and a second drive plate 51.

The first drive plate 41 may be bent in the axial direction on the outer circumferential surface thereof and provided with a plurality of catching portions 41a to be fitted into the grooves provided in the core plate 35 to rotate together with the core plate 35. have.

The first drive plate 41 is provided with a space in which the second drive plate 51 is disposed. Preferably, the first drive plate 41 and the second drive plate 51 are made of plates of the same thickness. That is, the first drive plate 41 as well as the second drive plate 51 may be disposed together in a space where the first drive plate 41 is disposed.

This structure can accommodate the second drive plate 51 in the existing space without securing a space for accommodating the second drive plate 51.

The first drive plate 41 is provided with outer spring support grooves 41b and 41c that can elastically support the outer springs 43 in the circumferential direction. These outer spring support grooves (41b, 41c) is preferably arranged in series (circumferential reference) in pairs of two.

In addition, the first drive plate 41 forms a groove open toward the center between the outer spring support grooves 41b and 41c to form a locking step 41d.

The outer springs 43 are inserted into the outer spring support grooves 41b and 41c of the first drive plate 41 and elastically supported.

Therefore, the outer springs 43 are arranged in series in pairs in the circumferential direction.

The retaining plates 45 are coupled in a state in which two plates are paired to face each other by a first stopper 53 (shown in FIG. 3) and a second stopper 55 (shown in FIG. 3). do. The retaining plate 45 is disposed with the first drive plate 41 interposed therebetween and provided with outer spring receiving grooves 45a, 45b, 47a and 47b for elastically supporting the above-described outer springs 43.

In addition, the retaining plate 45 is provided with inner spring receiving grooves 45c and 47c for accommodating the inner springs 49 along the circumferential direction. Inner springs 49 are received in the inner spring receiving grooves 45c and 47c of the retaining plate 45 in the circumferential direction.

The inner springs 49 preferably consist of a double spring with further springs disposed therein.

In addition, inner springs 49 may be disposed in the circumferential direction and inner spring support grooves 51a may be elastically supported in the second drive plate 51. The inner springs 49 are inserted into the inner spring support grooves 51a of the second drive plate 51 and the inner spring receiving grooves 45c and 47c of the retaining plates 45 and 47. Accordingly, the second drive plate 51 and the retaining plates 45 and 47 may move relative to each other while elastically supporting the inner spring 49.

On the other hand, the retaining plates 45 and 47 are coupled to the turbine 8 at the center portion. Since the turbine 8 is a mass, it is possible to maximize the vibration damping effect by the inertia of the turbine 8 when the retaining plates 45 and 47 rotate.

On the other hand, as shown in FIG. 5, the first stopper 53 has a stop guide 57 disposed between the retaining plates 45 and 47 and can be fixed by connecting them with a rivet 59. have.

As another example of the first stopper 53, as shown in FIG. 6, it is also possible to bend the portions to which the retaining plays 45 and 47 are coupled so as to be in contact with each other to fix them with the rivets 59.

This first stopper 53 structure can be manufactured using various coupling means. The first stopper 53 is disposed in a state of maintaining the distances A1 and A2 between the engaging jaws 41d of the first drive plate 41. Preferably, the distances A1 and A2 between the first stopper 53 and the engaging jaw 41d of the first drive plate 41 are the same or similar to each other.

The second stopper 55 is disposed at a distance B and a distance C with respect to both ends of the second stopper engaging portion 51b. The distance B from both ends of the second stopper engaging portion 51b to the second stopper 55 is preferably made larger than the distance C. FIG. That is, the second stopper 55 is spaced apart in the rotational direction in the second drive plate 51 in the rotational direction so that the damper forward operation section (section B in FIG. 3) and the damper reverse operation section (C in FIG. 3). Section) and the interval (B section) of the lockup operation section is larger than the interval C of the lockup release section.

When the lock-up clutch operates in the torque converter of the present invention as described above, a process of absorbing shock and vibration in the rotational direction in the process of directly connecting the driving force of the engine to the transmission will be described.

The piston drive plate 31 presses the piston 16 to the front cover 4 side by the hydraulic operation. The piston 16 is then moved to the front cover 4 side. The front cover 4 and the piston 16 are then in close contact with the friction materials 37, 39 therebetween.

The driving force of the engine is then transmitted to the core plate 35. The driving force transmitted to the core plate 35 is transmitted to the first drive plate 41.

The driving force transmitted to the first drive plate 41 presses the outer springs 43. At this time, the first vibration damping is performed at the outer spring 43 (the first damping part K1).

The first drive plate 41 rotates until it contacts the first stopper 53 (moves the section A1 in FIG. 3), and the retaining plates 45 and 47 contact the first stopper 53. When the first drive plate 41 and the retaining plates 45 and 47 no longer perform the state torsional movement, the outer spring 43 no longer performs the torsional movement of the retaining plates 45 and 47. Only the inner spring 49 and the second damping portion K2 described above are torsionally assembled.

At this time, the retaining plates 45 and 47 are connected to the turbine 8 and the turbine 8 serves as a mass body to maximize the vibration damping effect by inertia. The retaining plates 45 and 47 then press the inner spring 49, so that the second drive plate 51 is damped by the inner spring 49. As shown in FIG.

And the 2nd drive plate 51 moves the section B of FIG. 3, and the edge part of the 2nd stopper engaging part 51b (shown in FIG. 4) is closely attached to the 2nd stopper 55. As shown in FIG.

Since the second drive plate 51 is coupled to the transmission input shaft 21 (shown in FIG. 2), the second drive plate 51 may transmit a driving force to the transmission.

Therefore, the maximum torsion angle in the forward direction during the lockup operation is an angle obtained by adding the distance A1 (shown in FIG. 3) to the section B (shown in FIG. 3). If the damper is operated in the reverse direction, the maximum torsion angle is A2 plus C.

In particular, in the embodiment of the present invention, the outer springs 43 act only on the lockup operation, and the inner springs 49 operate on both the lockup operation and the unlocking operation.

Therefore, embodiments of the present invention can be connected in series with respect to the rotational direction to significantly increase the torsion angle and implement low rigidity. Therefore, the embodiment of the present invention can improve the vibration absorbing ability.

1 is a configuration diagram for explaining the power transmission structure of the damper in order to explain the embodiment of the present invention.

2 is a half sectional view showing a torque converter for explaining an embodiment of the present invention.

FIG. 3 is a diagram illustrating main parts for explaining the operation of FIG. 2.

4 is an exploded perspective view showing the main part of the torsion damper in order to explain in detail the configuration of the embodiment of the present invention.

5 is a view showing an example of the first stopper of the embodiment of the present invention.

6 is a view showing another example of the first stopper of the embodiment of the present invention.

7 is a view corresponding to FIG. 1 and illustrating a power transmission structure of a general damper.

Claims (7)

A front cover, an impeller coupled to the front cover to rotate together, a turbine disposed at a position facing the impeller, a reactor positioned between the impeller and the turbine to change oil flow from the turbine to the impeller side, the front A lockup clutch having a piston directly connected to the cover and the turbine and moving by oil pressure toward the front cover, and a torsional damper coupled to the lockup clutch, The torsional damper A first drive plate connected to the lockup clutch to receive rotational force; A plurality of outer springs on which reaction forces act in a rotational direction of the first drive plate, A pair of retaining plates that elastically support the outer springs, rotate with the driving force of the outer springs, and are coupled to the turbine; A plurality of inner springs are urged by the retaining plate and arranged in the circumferential direction on the inner circumferential side of the first drive plate, A second drive plate disposed on an inner circumferential side of the first drive plate and connected to a transmission input shaft to receive a driving force transmitted by the inner springs and to transmit the driving force to the transmission input shaft, The first drive plate is The outer circumferential surface is bent in the axial direction so that the leading end portion is fitted to the core plate of the lockup clutch, The retaining plate A first stopper is provided which connects the paired plates to each other and simultaneously limits the movement of the first drive plate, and a second stopper is provided that limits the relative movement with the second drive plate, The second stopper The second drive plate is provided with a predetermined interval spaced in the rotational direction so as to have a section operating in the reverse direction and a section that operates in the forward direction when the damper is operated so that the angle in which the damper is operated in the forward direction is more than the angle in the reverse operation. Made big, And a double damper structure coupled to the second stopper side to which the retaining plates are coupled to a portion of the inner circumferential side of the turbine. delete delete delete delete The method according to claim 1, The inner springs A vehicle torque converter having a double damper structure consisting of a double spring with other springs provided therein. The method according to claim 1, The outer springs A torque converter for a vehicle having a double damper structure in which two are arranged in pairs in series.

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