KR100363547B1 - Flywheel for motor vehicles - Google Patents

Abstract

The present invention relates to a vehicle flywheel. According to the present invention, the first semicircular guide hole and the center point are formed in a form in which the radius thereof gradually decreases from the upper side to the lower side of the vertical center line with respect to the center point on both sides with respect to the vertical center line. First masses each having second semi-circular guide holes formed in a form of gradually decreasing radius thereof; First and second springs interposed in the first and second semicircular guide holes, respectively; A second mass installed at an input shaft side of the transmission and having a rotating plate fixed therein; It is provided on the upper and lower portions of the rotating plate, respectively, characterized in that it comprises a first and second pressing rod for pressing the first and second spring. Therefore, it is possible to effectively absorb the torsional vibration generated from the engine through a simple structure.

Description

Flywheel for Vehicles {FLYWHEEL FOR MOTOR VEHICLES}

The present invention relates to a vehicle flywheel, and more particularly to a vehicle flywheel that can efficiently absorb the torsional vibration generated from the engine of the vehicle and transmitted to the transmission.

Generally, a flywheel is installed as a device for absorbing fluctuations in driving torque generated in an engine of a vehicle, and the flywheel includes a primary mass connected to the engine side and a secondary mass connected to the transmission side through a clutch. Dual mass flywheels are used, which consist of vibration dampers installed in the system.

The vibration damper is composed of a straight or arc-shaped coil spring or the like to maintain the connection between the two masses, and is arranged circumferentially or radially to transmit the rotational torque.

The system configuration of the dual mass flywheel is disclosed in Korean Patent Publication Nos. 97-701841 and 96-703208, which can absorb the torsional vibration generated in the engine by the elastic action of the spring and the damping action by friction. Function.

However, the conventional flywheel for a vehicle configured as described above generates damping force due to friction between the spring and the spring seat or guide hole and operating torque due to the spring force when relative rotation of the primary mass and the secondary mass occurs. Since there is no means for adjusting the size of the operating torque according to the rotation angle, there are problems such as difficulty in effectively absorbing the torsional vibration of the engine and a complicated structure, which leads to an increase in manufacturing cost.

The present invention is to solve the conventional problems as described above, the structure is simple, the vehicle flywheel that can effectively absorb the torsional vibration generated from the engine by adjusting the magnitude of the damping force and the operating torque according to the rotation angle The purpose is to provide.

In order to achieve the above object, the present invention is provided on the drive shaft side of the engine, the first formed on both sides of the vertical center line, the radius is gradually reduced from the vertical center line from the upper side to the lower side toward the center A first mass formed with a semi-circular guide hole and a second semi-circular guide hole formed in a shape such that a radius thereof gradually decreases from the lower side of the vertical center line to the upper side with respect to the center point; First and second springs interposed in the first and second semicircular guide holes, respectively; A second mass installed at an input shaft side of the transmission and having a rotating plate fixed therein; It is characterized in that it is provided on the upper and lower portions of the rotating plate, respectively, and has a flywheel for a vehicle having first and second pressing rods for pressing the first and second springs.

In addition, the present invention, the first semi-circular guide hole and the center point is provided on the drive shaft side of the engine, the radius is gradually reduced from the upper side to the lower side of the vertical center line with respect to the center point on both sides with respect to the vertical center line First masses each having second semi-circular guide holes formed in a shape such that a radius thereof gradually decreases from the lower side of the vertical center line to the upper side thereof; First and second springs interposed in the first and second semicircular guide holes, respectively; A second mass installed at an input shaft side of the transmission and having a rotating plate fixed therein; First and second damping force generating blocks installed on the upper and lower portions of the rotating plate so as to be movable upward and downward through guide rods, respectively, for pressing the first and second springs; According to another aspect of the present invention, there is provided a vehicle flywheel having third and fourth springs which elastically bias the first and second damping force generating blocks in an outward direction, respectively.

1 is a side view of a partially cutaway view schematically showing a first embodiment of a vehicle flywheel according to the present invention;

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is an operation showing the operating state of the first embodiment of the vehicle flywheel according to the present invention.

4 is a partial cutaway side view schematically showing a second embodiment of a vehicle flywheel according to the present invention;

5 is a cross-sectional view taken along the line B-B in FIG.

FIG. 6 is a perspective view illustrating an installation state of the damping force generating block illustrated in FIG. 4. FIG.

7 is an operation diagram showing an operating state of a second embodiment of a vehicle flywheel according to the present invention. FIG. 8 is a characteristic graph showing a relationship between an operating angle and an operating torque in a flywheel system.

<Description of the code | symbol about the principal part of drawing>

10,30: first mass 11, 12, 31, 32: first and second semi-circular guide hole

11a, 12a, 31a, 32a: stopper 13, 14, 33, 34: first and second spring

15,35: 2nd mass 16,36: rotating plate

19,20: first and second pressure rods 37,38: first and second damping force generating block

37a, 38a: Insertion groove 39,40: Guide rod

41,42: third and fourth springs

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

1 is a partial cutaway side view showing a first embodiment of a vehicle flywheel according to the present invention, Figure 2 is a cross-sectional view taken along line A-A of FIG.

The first embodiment of the vehicle flywheel according to the present invention, as shown in Figures 1 and 2, the first mass 10 is installed on the drive shaft 3 side of the engine 2 and the input shaft of the transmission 4 The 2nd mass 15 provided in the side 5 is provided.

In addition, a first semicircular guide hole 11 and a second semicircular guide hole 12 are formed at both sides of the inner surface of the first mass 10 based on the vertical center line, and the first semicircular guide hole 11 is formed of the first mass. The radius of the vertical center line is gradually reduced from the upper side to the lower side of the center point of the center (10) is formed in a shape that gradually decreases, the second semi-circular guide hole 12 is the lower center of the vertical center line around the center point of the first mass (10) At the upper side is formed in the shape that the radius gradually decreases.

In addition, the first and second semicircular guide holes 11 and 12 formed on the inner surface of the first mass 10 are interposed with the first and second springs 13 and 14, and the first and second semicircular guide holes. Stoppers 11a and 12a supporting both ends of the first and second springs 13 and 14 are formed at both ends of the first and second springs 13 and 14, respectively. ) Consists of a coil spring.

The rotating plate 16 is fixed to the second mass 15 to be coaxially rotated integrally with the second mass 15, and the first and second springs 13 are disposed above and below the rotating plate 16. First and second pressure rods 19 and 20 for pressurizing 14 are provided.

The first embodiment of the vehicle flywheel according to the present invention configured as described above operates as follows.

First, when the first mass 10 rotates by the rotation of the engine 2, the first and second semicircular guide holes 11 formed on the inner surface of the first mass 10 by the first mass 10 ( First and second springs 13 and 14 provided at 12 are formed on both ends of the first and second semi-circular guide holes 11 and 12, and the first and second pressure rods 11a and 12a. Compressed between the (19) and (20) to exert a force in the direction of rotation to the first and second pressing rods (19, 20), thereby causing the first and second pressing rods (19, 20) The rotating plate 16 provided rotates, and the second mass 15 fixed to the rotating plate 16 rotates.

And the torsional vibration generated in the first mass 10 is the buffering action of the first and second springs 13 and 14 and the first and second springs 13 before being transmitted to the second mass 15. It is absorbed by the damping action by the frictional force generated between the 14 and the first and second semicircular guide holes 11 and 12.

That is, the first and second pressing rods 19 and 20 are moved along the first and second semicircular guide holes 11 and 12 to press and compress the first and second springs 13 and 14. In this case, when one clockwise rotation is performed, the radial distance from the center point of the rotating plate 16 to one end of the first and second springs 13 and 14 is gradually shortened as shown in FIG. 3. When the first and second springs 13 and 14 are compressed, a buffer action is generated by the force generated to absorb the torsional vibration generated from the engine.

At this time, the force for pressing the first and second springs 19 and 20 to the first and second springs 13 and 14 is rotated by the first and second semicircular guide holes 11 and 12. Since it varies with the angle, the damping force and the magnitude of the operating torque are adjusted accordingly according to the rotation angle.

Therefore, in the first embodiment of the vehicle flywheel according to the present invention, the first and second pressing rods 19 and 20 move clockwise or counterclockwise along the first and second semicircular guide holes 11 and 12. While the buffering effect is made by pressing the first and second springs 13 and 14, and the pressing force of the first and second springs by the first and second pressure bars is changed according to the rotation angle. This allows the damping force and the magnitude of the operating torque to be appropriately adjusted according to the rotation angle, thereby effectively absorbing the torsional vibration generated from the engine. This is a characteristic graph showing the relationship between the operating angle and the operating torque shown in FIG. The characteristic curve ⓐ of the conventional integrated flywheel in Figure 8 is the characteristic curve between the operating angle and the operating torque rotated by the clutch plate, dual mass flywheel The characteristic curve ⓑ shows the characteristic curve when the spring radius is constant, the dual mass flywheel characteristic curve ⓒ shows the characteristic curve when the spring radius decreases gradually, and the dual mass flywheel characteristic curve ⓓ shows the characteristic curve when the spring radius increases gradually. The amount of torsional vibration transmitted from the engine to the transmission is determined by the spring stiffness and hysteresis of the flywheel system. In the conventional integrated flywheel, the rotation angle of the clutch plate is small to increase the spring stiffness. Since the position is located between 1000 to 2000 RPM of the engine rotation, rotational vibration generated by the engine while driving the vehicle is transmitted to the transmission as it is, so that the damping effect is small. However, due to the large operating angle of the spring mounted between the primary mass and the secondary mass, the dual mass flywheel can lower the stiffness of the spring for excellent vibration isolation effect and lower the resonant frequency position of the system below 700 RPM. Therefore, the vibration isolation effect in the vehicle driving section is also excellent. The present invention has the feature that the shape of the characteristic curve can be adjusted in the form of ⓒ or ⓓ as compared to the constant radius system by changing the spring radius according to the operating angle. In order to improve the vibration transmission characteristic of the drive system, it is necessary to lower the spring stiffness which is the slope of the characteristic curve in FIG. 8. Therefore, in the case where the rotational operating angles of the primary mass and the secondary mass are small, the spring stiffness must be reduced as shown in the characteristic curve ⓓ to increase the vibration insulation effect. In order to design the system so that the spring stiffness must be small even in a section with a large operating angle as shown in the characteristic curve ⓒ. Vibration insulation effect can be obtained.

4 to 7 show a second embodiment of the vehicle flywheel according to the present invention, wherein the first mass 30 installed on the driving shaft 3 side of the engine 2 and the input shaft side of the transmission 4 are shown. The 2nd mass 35 provided in (5) is provided.

In addition, a first semicircular guide hole 31 and a second semicircular guide hole 32 are formed at both sides of the first mass 30 on the inner surface of the first mass 30, and the first semicircular guide hole 31 has a first mass. The radius is gradually reduced from the upper side to the lower side of the vertical center line with respect to the center point of the center 30, and the second semicircular guide hole 32 is located below the vertical center line centering on the center point of the first mass 30. At the upper side is formed in the shape that the radius gradually decreases.

The first and second semicircular guide holes 31 and 32 formed on the inner surface of the first mass 30 are interposed with the first and second springs 33 and 34, and the first and second semicircular guide holes. Stoppers 31a and 32a supporting both ends of the first and second springs 33 and 34 are formed at both ends of the first and second springs 33 and 32, respectively. ) Consists of a coil spring.

The rotating plate 36 is fixed to the second mass 35 in a coaxial manner so that the rotating plate 36 is integrally rotated with the second mass 35, and the first and second springs 33 are disposed above and below the rotating plate 36. First and second damping force generating blocks 37, 38 for pressing 34 are provided.

The first and second damping force generating blocks 37 and 38 are installed to be movable upward and downward through guide rods 39 and 40 provided at upper and lower sides of the rotating plate 36, and at the same time, the third and fourth springs. (41) (42) is installed so as to be elastically biased in the outward direction, the first and second damping force generating block (37) 38, the lower portion of the first and second damping force as shown in detail extracted in Figure 6 In order to prevent interference with the rotating plate 36 when the generating blocks 37 and 38 are lowered, insertion grooves 37a and 38a into which the rotating plate 36 is inserted to a predetermined depth are formed, respectively.

The second embodiment of the vehicle flywheel according to the present invention configured as described above operates as follows.

First, when the first mass 30 rotates by the rotation of the engine 2, the first and second semi-circular guide holes 31 formed on the inner surface of the first mass 30 by the first mass 30 ( First and second springs 33 and 34 provided in the first and second stops 31a and 32a and first and second damping forces formed at both ends of the first and second semicircular guide holes 31 and 32, respectively. Compression between the blocks 37 and 38 causes the first and second damping force generating blocks 37 and 38 to exert a force in the rotational direction, thereby causing the first and second damping force generating blocks 37 ( The rotating plate 36 provided with 38 is rotated, and the second mass 35 fixed to the rotating plate 36 is rotated.

And the torsional vibration generated in the first mass 30, the buffering action of the first and second springs 33, 34 and the first and second damping force generating block before being transmitted to the second mass (35) 37) are absorbed by the damping action by the frictional force generated between the 38 and the first and second semi-circular guide holes 31, 32.

That is, the first and second damping force generating blocks 37 and 38 are moved along the first and second semicircular guide holes 31 and 32 to press the first and second springs 33 and 34. In compression, when rotated clockwise as an operation example, the radial distance from the center point of the rotating plate 36 to one end of the first and second springs 33 and 34 is gradually increased as shown in FIG. As the first and second springs 33 and 34 are compressed, a cushioning action is generated by the force generated as the first and second springs 33 and 34 are compressed, thereby changing the operating torque in the rotational direction.

At this time, the force for pressing the first and second springs 33 and 34 by the first and second damping force generating blocks 37 and 38 is controlled by the first and second semicircular guide holes 31 and 32. Since the rotation angle is changed, the size of the operating torque is appropriately adjusted according to the rotation angle.

In the process of moving the first and second damping force generating blocks 37 and 38 clockwise along the first and second semicircular guide holes 31 and 32, the first and second damping force generating blocks 37 38 compresses the third and fourth springs 41 and 42, which gradually descend along the guide rods 39 and 40, and elastically biases them outwards. As the repulsive force generated from the springs 41 and 42 is transmitted to the first and second damping force generating blocks 37 and 38 to apply a normal force to the first and second damping force generating blocks 37 and 38. The damping action is performed in such a way that a frictional force is generated between the first and second damping force generating blocks 37 and 38 and the first and second semicircular guide holes 31 and 32.

At this time, since the frictional force between the first and second damping force generating blocks 37 and 38 and the first and second semicircular guide holes 31 and 32 is changed according to the rotation angle, the magnitude of the damping force is thereby rotated. The angle may be adjusted appropriately.

As described above, according to the vehicle flywheel of the present invention, the damping force and the magnitude of the operating torque can be adjusted according to the rotation angle to effectively absorb the torsional vibration generated from the engine, and the structure is simple to reduce the manufacturing cost. It can provide such effects.

While the invention has been shown and described with respect to certain preferred embodiments, the invention is not limited to the embodiments described above, and those skilled in the art will appreciate Various modifications may be made without departing from the spirit of the invention described.

Claims (3)

It is installed on the driving shaft side of the engine, and the first semicircular guide hole and the center of the center point are formed on both sides with respect to the vertical center line, and the radius thereof gradually decreases from the upper side to the lower side of the vertical center line. A first mass having a second semicircular guide hole formed in a shape such that a radius thereof gradually decreases toward an upper side of the upper surface; First and second springs interposed in the first and second semicircular guide holes, respectively; A second mass installed at an input shaft side of the transmission and having a rotating plate fixed therein; First and second pressurizing rods respectively installed at upper and lower portions of the rotating plate to pressurize the first and second springs; Vehicle flywheel, characterized in that it comprises. It is installed on the driving shaft side of the engine, and the first semicircular guide hole and the center of the center point are formed on both sides with respect to the vertical center line, and the radius thereof gradually decreases from the upper side of the vertical center line to the lower side of the center point. A first mass having a second semicircular guide hole formed in a shape such that a radius thereof gradually decreases toward an upper side of the upper surface; First and second springs interposed in the first and second semicircular guide holes, respectively; A second mass installed at an input shaft side of the transmission and having a rotating plate fixed therein; First and second damping force generating blocks installed on the upper and lower portions of the rotating plate so as to be movable upward and downward through guide rods, respectively, for pressing the first and second springs; Third and fourth springs for elastically biasing the first and second damping force generating blocks in an outward direction, respectively; Vehicle flywheel, characterized in that it comprises. The method of claim 2, Vehicle flywheels, characterized in that the lower portion of the first and second damping force generating block is formed with an insertion groove for a predetermined depth to prevent interference with the rotating plate when the first and second damping force generating block is lowered.