KR20070052414A - Hook structure of torque converter - Google Patents

Abstract

The present invention relates to a hook structure of a torque converter, and is provided in the lockup clutch (5) so as to contract the damper spring (6) arranged at a predetermined interval along the circumferential direction of the turbine (4) In the hook structure of the torque converter configured to absorb the pressure, the hook 14 fitted between the damper springs 6 is formed along the circumferential direction of the hook guide 12 fixed to the lock-up clutch 5. It is installed to move along the (13), the hook 14 has a configuration that is elastically supported to be held in a predetermined position by the elastic body 16 mounted to the lock-up clutch (5), according to this configuration The shock absorption function is excellent by increasing the torsion angle when up.

Torque Converter, Damper, Spring, Hook, Torsion Angle

Description

Hook structure of torque converter

1 is a schematic block diagram showing a configuration of a general torque converter;

FIG. 2 is a perspective view showing the lockup clutch portion of FIG. 1; FIG.

3 is a view showing a structure for absorbing a shock generated during lockup according to the prior art;

4 is a schematic configuration diagram showing a torque converter having a hook structure according to the present invention;

5 illustrates in detail the main parts of the invention;

6 shows a hook guide of the present invention;

7 shows a hook and hook support of the present invention;

8 is a graph for explaining the operation of the present invention.

※ Explanation of symbols about main part of drawing ※

2: front cover 3: impeller

4: turbine 5: lockup clutch

6: damper spring 12: hook guide

13: groove 14: hook

15 hook support 16 elastic body

S: space

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook structure of a torque converter, and more particularly, to a hook structure of a torque converter having an excellent shock absorption function by increasing a torsion angle during lockup.

In general, an automatic transmission for a vehicle has a torque converter and a multi-speed gear mechanism connected to the torque converter, and hydraulically operated friction for selecting any one gear stage of the transmission gear mechanism according to the driving state of the vehicle. Contains an element.

Usually, the automatic transmission operates the hydraulic pressure generated from the oil pump by selecting a friction element through a control valve, so that an appropriate shift is automatically performed according to the driving state of the vehicle.

The automatic transmission vehicle has a configuration in which power transmission is performed by installing a torque converter between the engine and the transmission.

The torque converter is a device that transmits power by using a fluid, the front cover receiving power from the engine, an impeller welded to the front cover and having a plurality of impeller blades inside, and disposed opposite to the impeller. A lock having a plurality of turbine blades in the shaft, and a hub connected to the turbine for supporting an input shaft for transmitting rotational power of the engine to the transmission, the lock-up clutch transferring power during lock-up between the turbine and the front cover; Is fitted.

The lock-up clutch transmits the pump side of the torque converter and the turbine, and is directly connected by a friction clutch plate provided on the turbine side by hydraulic pressure.

A typical torque converter configuration is shown in FIG.

The torque converter 1 transmits torque by using a fluid as a power transmission medium, and is welded to the front cover 2 and the front cover 2 which are powered from an engine (not shown), and a plurality of insides. An impeller 3 holding an impeller blade, and a turbine 4 disposed opposite to the impeller 3 and having a plurality of turbine blades therein, between the turbine 4 and the front cover 2. The lockup clutch 5 which transmits power at lockup is mounted.

The lockup clutch 5 is directly connected by a friction clutch plate provided on the turbine 4 side by hydraulic pressure.

In addition, the lockup clutch 5 performs its function by being in close contact with the inner surface of the front cover 2 by the oil pressure flowing into the torque converter 1.

Figure 2 is a perspective view showing the lock-up clutch portion of Figure 1, Figure 3 is a view showing a structure for absorbing the shock generated during the lock-up according to the prior art.

Several damper springs 6 are arranged at one side of the lockup clutch 5, that is, at the turbine 4 side, spaced apart along the circumferential direction, and the lockup clutch 5 is interposed between the damper springs 6. A spring support 8 is provided which is fixed to and forms a gap so that both ends of adjacent damper springs 6 are kept a predetermined distance apart.

In addition, a hook 7 positioned between the damper springs 6 is fixedly installed at one side of the turbine 4, that is, the lockup clutch 5 side, so that the shock is absorbed while pushing the damper springs 6 during lockup. Done.

The relative rotational amount formed between the turbine 4 and the lock-up clutch 5 while the hook 7 pushes the damper spring 6 is called a torsion angle. The greater the torsion angle, the softer the shock is absorbed, so that the riding comfort is good. Lose. Therefore, various techniques for increasing the torsion angle have been developed or used, such as slip lockup, long travel damper and the like.

In general, it is sufficient to increase the length of the damper spring to increase the torsion angle, but as the length of the damper spring increases, the damper spring is abnormally bent and the side of the damper spring is damped, i.e., the lock-up clutch (5). ), The hysteresis increases, and so on.

Accordingly, the present invention is to solve the above-mentioned conventional problems, to increase the twist angle without increasing the length of the damper spring is effective in absorbing the shock generated during lock-up and to increase the hysteresis with the increase in the length of the damper spring It is an object of the present invention to provide a hook structure of a torque converter that can be eliminated.

As a technical configuration for achieving the above object, the present invention, the torque is installed in the lock-up clutch so as to retract the damper spring disposed at a predetermined interval along the circumferential direction of the turbine configured to absorb the shock generated during lock-up In the hook structure of the converter, a hook that is inserted between the damper spring is installed to be movable along a groove formed along the circumferential direction of the hook guide fixedly installed in the lockup clutch, the hook is mounted to the lockup clutch By providing a hook structure of the torque converter characterized in that the elastic support is maintained so as to be maintained in a predetermined position by the elastic body.

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

4 is a schematic configuration diagram showing a torque converter having a hook structure according to the present invention, in which reference numerals showing elements having the same or similar configuration as those of the conventional torque converter shown in FIGS. The same as the above and detailed description of these parts will be omitted.

The torque converter 10 having the hook structure of the present invention has a hook guide 12 fixed to one side of the turbine 4, that is, to the lockup clutch 5 side.

The hook guide 12 has a continuous shape along the circumferential direction a predetermined radius away from the center of the turbine 4, as shown in Figures 5 and 6, a plurality of grooves 13 are spaced apart at regular intervals along the circumferential direction Has This groove 13 has a shape formed long along the circumferential direction of the hook guide 12.

The hook 14 is fitted into the groove 13 of the hook guide 12 so as to be movable along the groove 13. The hook 14 may have a structure that fits alone into the groove 13 of the hook guide 12, and the hook 14 is fixed to the hook support 15 having a circular ring shape as shown in FIG. 7. The installed structure may be taken. In the latter case, the hook guide 12 should have a structure that can accommodate the hook support 15 to provide a space for the hook support 15 to move with the hook 14. As an example, the hook guide 12 is formed to have an approximately 'C' shaped cross section as shown in FIG. 6 and has a space S for accommodating the hook support 15 and an end portion of the open portion. Is fixed to the turbine 4 in the form of being in contact with the surface of the turbine 4.

Of course, the hook 14 is sandwiched between the damper spring (6) has a general structure to perform shock absorption by contracting the damper spring (6) when locking up.

The hook 14 has an arc shape having the same curvature as the groove 13 of the hook guide 12, and the length of the hook 14 is smaller than the length of the groove 13 of the hook guide 12. As a result, a certain distance from the groove 13 can be moved.

The hook 14 is elastically supported to be held at a predetermined position by the elastic body 16, and the elastic body 16 is sufficient to be elastically deformable by an external force, such as a coil spring. As an example, when applied as a coil spring, one end of the coil spring is connected to the hook 14 and the other end is connected to the hook guide 12 so that the hook 14 is held in a preset position when the hook 14 is not subjected to external force.

The operation of the present invention having such a configuration will be described.

In the absence of an external force, the hook 14 is held in a preset position of the groove 13 of the hook guide 12.

The lock-up clutch 5 is in close contact with the inner surface of the front cover 2 by the oil pressure flowing into the torque converter 10 at the time of lock-up, and the relative rotation between the turbine 4 and the lock-up clutch 5 is performed. The relative rotation causes the hook 14 disposed between the damper springs 6 to contract the damper springs 6.

At this time, since the hook 14 is elastically supported by the elastic body 16 while being installed to be movable along the groove 13 of the hook guide 12, the hook guide 12 may be elastically deformed while the elastic body 16 is elastically deformed. Moves along the grooves 13 of the.

Therefore, the amount of elastic deformation of the elastic body 16 and the amount of deformation of the damper spring 6 become the torsion angle, which is compared with the torsion angle formed by only the damper spring 6 as in the prior art as shown in FIG. Is increased.

According to the hook structure of the torque converter according to the present invention as described above, the hook installed in the lock-up clutch is supported by the elastic body and configured to be movable along the circumferential direction of the lock-up clutch by external force, so that the torsion angle at the time of lockup is damper. Increased by springs and elastomers.

This increase in the torsion angle more smoothly absorbs the impact force generated during lockup to improve ride comfort.

Claims (3)

In the hook structure of the torque converter provided in the lockup clutch (5) so as to retract the damper spring (6) arranged at a predetermined interval along the circumferential direction of the turbine (4) to absorb the shock generated during lockup, The hook 14 fitted between the damper springs 6 is installed to be movable along the groove 13 formed along the circumferential direction of the hook guide 12 fixed to the lockup clutch 5. The hook structure of the torque converter, characterized in that the hook (14) is elastically supported to be held in a predetermined position by the elastic body (16) mounted to the lock-up clutch (5). According to claim 1, The hook guide 12 has a space (S) formed along the circumferential direction, The hook 14 is a hook support (movably received in the space (S) of the hook guide 12) 15) The hook structure of the torque converter characterized in that it is fixedly installed. The hook structure of a torque converter according to claim 1 or 2, wherein the groove (13) of the hook guide (12) is disposed at several places at regular intervals along the circumferential direction.

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