KR20090023007A - Lubricating apparatus for dual mass flywheel - Google Patents

Abstract

A lubricating apparatus of a dual mass flywheel provided to improve durability of a dual mass flywheel by reducing abrasion and friction of a first mass and a second mass. A drive plate(7) is arranged between a first mass(1) and a second mass(5). An outer torsion spring(16) is arranged with being contacted with a flange part of the drive plate. An inner torsion spring(15) is arranged in the inner space of the outer torsion spring. A torsion guide(17) plays a guide role of the inner torsion spring and the outer torsion spring. A bushing(11) is positioned at a hub in which the second rubs. A shaft bushing forms the second mass and a friction surface with the bushing.

Description

Lubrication device of dual mass flywheel {LUBRICATING APPARATUS FOR DUAL MASS FLYWHEEL}

The present invention relates to a lubrication device of a dual mass flywheel interposed between an engine output shaft and a transmission pressure shaft of a vehicle to attenuate torsional vibration, and more particularly, a bushing and a shaft bushing in the form of "a" or "b". The present invention relates to a lubrication apparatus of a dual mass flywheel capable of increasing durability of a dual mass flywheel by reducing wear and friction of the first mass and the second mass.

In general, in the engine, only the expansion stroke becomes the output stroke, and the intake, compression, and exhaust strokes decrease in power, which causes the rotational force to become larger or smaller due to the expansion stroke, so that the rotational speed of the engine changes periodically. The rotation speed difference is caused by the variation. That is, the pulsating rotation of the engine is changed to smooth rotation by using the rotational inertia force of the flywheel, and the flywheel is a rotational inertia made of cast iron mounted on the crankshaft and fits the ring gear on the outer circumference, which is a starting motor. It is generally used only when starting the engine in conjunction with a pinion.

In addition, although the rotational force generated by the combustion of the mixer is transmitted to the crankshaft at intervals, the flywheel tries to rotate at a constant speed due to inertia, thereby obtaining a uniform rotational force. The larger and heavier the outer diameter, the greater the inertia, so the change in engine speed becomes difficult and the response slows down as the accelerator pedal opens and closes.

However, an increase in torque fluctuations such as an increase in the torque output of the engine and a decrease in the gear ratio of the transmission has reached a limit in that the rotational vibration of the engine can be controlled only by the function of the existing flywheel.

Therefore, the prior art required the invention of a flywheel that can more effectively reduce the torque fluctuations at the start-up and start-up of the engine. In this way, a double mass flywheel is divided into two conventional flywheels connected to the engine side. It consists of one mass and a second mass connected to the transmission via the clutch, and it is equipped with a vibration damper to enable proper connection between the two masses. The vibration damper is usually composed of a torsion spring or an elastic medium having a similar function, and maintains a connection between two masses and transmits rotational torque, and is arranged in a circumferential or radial direction.

In this device, firstly, the torque impact of the engine is mitigated by the elastic action of the elastic medium and the damping by friction. Second, the damping action of the torsional vibration of the drive system in the idle, commercial area, etc. of the engine. Will be

However, the conventional dual mass flywheel cannot secure durability in friction and wear of the first mass body and the second mass body, and has a problem in that the vibration and noise attenuation of the vehicle is limited.

The present invention has been made to solve the above problems of the prior art, an object of the present invention is to provide a lubrication device of a dual mass flywheel that can ensure the durability against friction and wear of the first mass and the second mass. .

The present invention provides a lubrication apparatus for a dual mass flywheel including a first mass coupled to an engine output shaft of a vehicle and a hub connecting axially to a second mass coupled to an input shaft of a transmission, wherein friction occurs with the second mass. A bushing located in the hub; And an axial bushing forming a friction surface with the second mass together with the bushing.

In the present invention, the shaft bushing is characterized in that formed of a polymer-based material.

The dual mass flywheel according to the present invention configured as described above has an axis bushing capable of forming a structure having excellent lubricity, thereby reducing wear and friction of the first and second masses, thereby increasing durability of the dual mass flywheel. There is this.

In addition, it is possible to increase the vibration and noise attenuation performance of the vehicle, there is an advantage that can provide a production cost reduction.

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

1 is a side cross-sectional view of a dual mass flywheel according to the present invention, and FIG. 2 is an enlarged view of portion A of FIG. 1.

As shown in FIG. 1, in one embodiment of the axial bushing of a dual mass flywheel in the present invention, the dual mass flywheel includes a drive plate 7 disposed between the first mass body 1 and the second mass body 5, An outer torsion spring 16, which may be disposed against the flange portion of the drive plate 7, and an inner torsion spring, which may be disposed in an inner space of the outer torsion spring 16; (15), mass ring (2), ring gear (3), first cover (4), seal washer in addition to torsion guide (17) serving as a guide for outer torsion spring and inner torsion spring (15, 16) washer (6), metal washer (8), bolt (9), hub (10), bushing (11), support washer (13), friction washer (14), elastic An elastic washer 18 or the like.

As shown in FIG. 2, one embodiment of the dual mass flywheel according to the present invention has a " a " in a hub 10 located inside a bolt 9 mounted with a first mass 1 (shown in FIG. 1). Place the bushing 11 in the shape of a child. Here, friction may occur at the friction surface of the second mass 5, which is fastened with a seal washer 6 (shown in FIG. 1), which serves as a sealing device, and a rivet, and the upper end of the letter “b” of the bushing. One example according to the present invention forms a structure capable of increasing durability in friction and wear of the first mass 1 (shown in FIG. 1) and the second mass 5. Of course, the "b" shaped bushing 11 is a case showing a side cross-section, the actual structure is provided with an annular.

3 to 6 show various examples of the lubrication actuation structure of the dual mass flywheel according to the invention.

As shown in FIG. 3, one embodiment of the dual mass flywheel according to the present invention has a " a " in a hub 10 located inside a bolt 9 mounted with a first mass 1 (shown in FIG. 1). A bushing 11 in the shape of a child is positioned, and friction occurs at the friction surface of the second mass 5, which is fastened to the thread washer 6 with the rivet, and the upper end of the "a" ruler of the bushing. This is the same as the example of FIG.

However, FIG. 3 is a method for further increasing wear resistance with respect to FIG. 2, and further includes a polymer-type axial bushing 12 having excellent lubricity at the upper end of the “a” shaped bushing 11. Positioning can reduce the relative rotation distance, thereby reducing friction and wear of the first mass 1 (shown in FIG. 1) and the second mass 5.

That is, one example according to the present invention forms a structure that can further increase durability in friction and wear of the first mass and the second mass.

As shown in FIG. 4, an embodiment of a dual mass flywheel according to the invention is shown in FIGS. 1 to 1 in a hub 10 located inside a bolt 9 mounted with a first mass 1 (shown in FIG. 1). Place a bushing 11 different from FIG. 3. That is, FIG. 4 shows a seal washer 6 (shown in FIG. 1) serving as a sealing device by adding a polymer-type shaft bushing 12 having excellent lubricity to the lower end of the cylindrical bushing 11 at the hub 10. The friction surface of the inner part of the second mass 5 fastened by the rivet and the shaft bushing 12 form a structure capable of causing lubricating friction. Of course, the cylindrical bushing 11 is a case showing a side cross-section, the actual structure may have an annular shape.

In addition, the structure in which one end of the center hole of the second mass 5 is seated in the hub 10 in FIG. 4 is configured differently from FIGS. 1 to 3.

In other words, the hub 10 has a locking step shape in which the outer periphery of one end of the center hole of the second mass 5 can be seated on the hub 10. 4 to 6 likewise have such a locking step in the center of the hub 10 so as to seat one end of the center hole of the second mass (5).

As shown in FIG. 5, one embodiment of the dual mass flywheel according to the invention is a “b” in the hub 10 located inside the bolt 9 which is mounted with the first mass 1 (shown in FIG. 1). The friction surface of the inner part of the second mass 5, which is fastened by a seal washer 6 (shown in FIG. 1) serving as a sealing device by placing the shape of the bushing 11 in the shape of a ruler, and the upper portion of the “b” shape of the bushing. To form a structure that can cause lubrication friction.

Of course, the "b" shaped bushing 11 is a case showing a side cross-section, the actual structure has an annular shape.

As shown in FIG. 6, one embodiment of the dual mass flywheel according to the present invention has a " b " in a hub 10 located inside a bolt 9 which is mounted with a first mass 1 (shown in FIG. 1). The friction surface of the inner part of the second mass 5, which is fastened by a seal washer 6 (shown in FIG. 1) serving as a sealing device by placing the shape of the bushing 11 in the shape of a ruler, and the upper portion of the “b” shape of the bushing. To cause the friction in the same as in the example of FIG.

However, FIG. 6 is a method for further increasing abrasion resistance with respect to FIG. 5, by additionally placing a polymer-type shaft bushing 12 having excellent lubricity at an upper end in the axial direction of the “b” shaped bushing 11. By reducing the rotation distance, the friction and wear of the first mass 1 (shown in FIG. 1) and the second mass 5 can be reduced.

As such, the dual mass flywheel according to the present invention has a "b" shaped or "b" shaped bushing and shaft bushing capable of forming a structure having excellent lubricity, thereby abrasion and friction of the first mass and the second mass. The durability of the double mass flywheel can be increased by reducing the

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the technical field of the present invention without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

1 is a side cross-sectional view of a dual mass flywheel in accordance with the present invention.

FIG. 2 is an enlarged view of portion A of FIG. 1.

3 to 6 show various examples of the lubrication actuation structure of the dual mass flywheel according to the invention.

Explanation of symbols on the main parts of the drawings

1: first mass 5: second mass

9: bolt 10: hub

11: bushing 12: shaft bushing

Claims (2)

A first mass coupled to the engine output shaft of the vehicle, In the lubrication device of a dual mass flywheel comprising a hub for axially connecting a second mass connected to the input shaft of the transmission, A bushing positioned at the hub in friction with the second mass; And A lubrication device for a dual mass flywheel, comprising: an axial bushing that forms a friction surface with the second mass together with the bushing. The method of claim 1, A shaft bushing is a lubrication device for a dual mass flywheel, characterized in that formed of a polymer-based material.

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