KR200340046Y1 - Clutch disc assembly - Google Patents

Abstract

The present invention relates to a clutch disk assembly, and more particularly to a clutch disk assembly that can significantly reduce vibration and noise as well as reduce the cost of the product by improving the damping performance to buffer the rapid torque transmission.

Disc assembly according to the present invention is a clutch contact portion that receives torque by friction contact; A hub plate having one side fixedly coupled to the clutch contact portion to form a plurality of slit holes in the circumferential direction and an axial through hole formed at the center thereof; A disc plate and a sub plate disposed on both sides of the hub plate with a plurality of slit holes formed in a circumferential direction at a position corresponding to the slit holes of the hub plate, and each having an axial through hole formed in the center thereof; A hub installed to penetrate through the axial through-holes of the hub plate, the disc plate and the subplate, and coupled to the disc plate and the subplate; And a plurality of torsion rubber springs inserted into the slit holes of the hub plate and the disc plate and the subplate to buffer rapid torque transmission.

Description

Clutch Disc Assembly {CLUTCH DISC ASSEMBLY}

The present invention relates to a clutch disk assembly, and more particularly to a clutch disk assembly that can significantly reduce vibration and noise as well as reduce the cost of the product by improving the damping performance to buffer the rapid torque transmission.

In general, there are manual transmissions and automatic transmissions in transmissions that transmit engine power in automobiles. Disc friction clutches are used in manual transmissions, and torque converters are used as a type of fluid clutches in automatic transmissions.

1 is a side cross-sectional view showing a disc friction clutch including a conventional clutch disc assembly, FIG. 2 is a plan view showing another clutch disc assembly according to the related art, and FIG. 3 is a cross-sectional view taken along the line A-A of FIG.

Looking at the disk friction clutch according to the prior art with reference to Figure 1, disclosed in the US Patent Nos. 6,062,364 and 5,927,459 largely flywheel (2), clutch cover assembly (3), clutch disc assembly (4) Plate 7 is fixed to the end of the crankshaft 5 so as to intermittently transfer torque from the crankshaft 5 of the engine E to the main drive shaft 6 of the transmission mechanism. In addition, the flywheel 2 is also fixed by the bolt 11 near the outer circumference of the plate 7.

Here, the clutch cover assembly 3 is composed of a clutch cover 21, a pressure plate 22 and a diaphragm spring 23, the clutch cover 21 is a hole through which the main drive shaft 6 passes in the center thereof. It is formed so as to be fixed to the flywheel (2), the release mechanism (8) is provided on the outside of the main drive shaft (6) to be movable in the axial direction.

In addition, one end of the strap plate 24 is fixed to the outer circumferential portion of the pressure plate 22 by bolts 28, and the other end of the strap plate 24 is installed to be fixed to the clutch cover 21. On the inner circumferential end of the cover 21, a stud pin 26 is installed to support two wire rings 27.

Thus, when the release mechanism 8 is moved to the flywheel side, the release mechanism 8 pushes the inner end of the diaphragm spring 23 to the engine side, thereby outwardly of the diaphragm spring 23. A stage is rotated about the contact point with the said wire ring 27 to a rotation center.

At this time, the clutch disc assembly 4 is spaced apart from the flywheel 2 so that power transmission from the engine E to the transmission is interrupted.

Next, the disc assembly 4 comprises a clutch contact 31, a disc plate 32, a sub plate 33, a hub 34, a flange 35, and a coil spring 36, wherein the disc The plate 32 and the sub plate 33 are coupled to each other by the pin 38, and a friction generating mechanism portion 37 made of a plurality of washers is installed between the disc plate 32 and the sub plate 33.

At this time, the clutch contact portion 31 is composed of a plate 41 and a plurality of friction pads fixed thereto, and the plate 41 of the clutch contact portion 31 is fastened to the plate 32 by rivets 39. The main drive shaft 6 is configured to have spline gear teeth that are splined with the hub 34 of the clutch disc assembly.

Looking at the power transmission path of the disk friction clutch configured as described above, the torque transmitted from the crankshaft (5) is integral with the flywheel (2), clutch cover (21), pressure plate (22) and clutch contact portion (31). The torque transmitted to the clutch contact portion 31 is transmitted to the transmission mechanism via the plates 32 and 33, the coil spring 36, the hub 34, and the main drive shaft 6.

However, the clutch disc assembly included in the disc friction clutch configured as described above has a problem that not only the manufacturing process is complicated, but also the material cost increases, and the damping angle of the coil spring 36 is not good, so that the damping performance is not sufficient. have.

This problem is described in detail below through another conventional clutch disc assembly similar to the clutch disc assembly included in the disc friction clutch.

The conventional clutch disc assembly is similar to the clutch disc assembly of FIG. 1 as shown in FIGS. 2 and 3, and the clutch contact portion 131, the disc plate 132, the sub plate 133, the hub 134, and the hub are similar to each other. The plate 135 includes a torsion spring 136 in the form of a coil, and the clutch contact portion 131 includes a cushioning plate 141 and a facing 140 that is fixedly coupled to the cushioning plate 140. It is composed.

Here, the hub plate 135 has a recessed groove 159 formed on the outer circumferential side at predetermined intervals, and the disk plate 132 and the subplate 133 at positions corresponding to the recessed groove 159 are formed. The stopper pins 138 are coupled to each other so that the disc plate 132 and the sub plater 133 are coupled to each other.

Looking at the power transmission path of the clutch disk assembly configured as described above, the torque transmitted to the facing 140 is via the cushion plate 141, the disk plate 132 and the sub-plate 133, the torsion spring ( 136, which is in turn delivered to hub plate 135 and hub 134.

In particular, when torque is transmitted to the disc plate 132 and the sub plate 133 and rotation starts, the disc plate 132 and the sub plate 133 push one end of the torsion spring 136 and the The torsion spring 136 compresses the shock of the rapid torque transmission while being compressed and pushes the hub plate 135 through the other end of the torsion spring 136 to transmit torque.

However, since the clutch disk assembly configured as described above is configured to include a coil-shaped torsion spring 136, when the excessive torque is transmitted, the torsion spring 136 is excessively compressed so that the stop pin 138 is connected to the hub. In addition to the vibration and noise generated by hitting the concave groove 159 of the plate, there is a problem in that the parts are easily damaged. To solve this problem, a torsion spring having a large spring constant or a plurality of torsion springs may be applied. This can increase production costs.

The present invention was devised to solve the above problems of the prior art, and improved damping structure of the torsion spring to reduce the displacement increase ratio with respect to the torque increase ratio when the torque is higher than the set value, even if excessive torque is applied, excellent damping It is an object of the present invention to provide a clutch disc assembly capable of maintaining performance.

1 is a side cross-sectional view showing a disc friction clutch including a conventional clutch disc assembly;

2 is a plan view showing another clutch disk assembly according to the prior art,

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

4 is a plan view showing a clutch disk assembly according to the present invention,

5 is a cross-sectional view taken along line B-B of FIG. 4;

6a to 6c is a schematic view showing a torsion rubber spring manufacturing process of the main part of the present invention,

7 is a graph showing the characteristic curve of the torsion rubber spring which is the main part of the present invention.

<Explanation of symbols on main parts of the drawings>

231: clutch contact portion 232: disc plate

233: subplate 234: hub

235: hub plate 236: torsion rubber spring

236a: torsion spring 236b: rubber

Clutch disc assembly according to the present invention for solving the above problems is a clutch contact portion that receives torque by friction contact; A hub plate having one side fixedly coupled to the clutch contact portion to form a plurality of slit holes in the circumferential direction and an axial through hole formed at the center thereof; A disc plate and a sub plate disposed on both sides of the hub plate with a plurality of slit holes formed in a circumferential direction at a position corresponding to the slit holes of the hub plate, and each having an axial through hole formed in the center thereof; A hub installed to penetrate through the axial through-holes of the hub plate, the disc plate and the subplate, and coupled to the disc plate and the subplate; And a plurality of torsion rubber springs inserted into the slit holes of the hub plate and the disc plate and the subplate to buffer rapid torque transmission.

In the present invention, the torsion rubber spring (Torsion rubber spring) is manufactured so that the rubber (Rubber) is injected into the mold in the state in which the torsion spring (Torsion spring) is built in the mold, the pressure injection, the torsion spring A rubber film having a predetermined thickness is formed on the outer circumference thereof and is manufactured to have a uniform diameter.

In the present invention, the torsion rubber spring provides a constant damping force when a torque below a set value is applied, and provides a damping force greater than a constant damping force when a torque above a set value is applied, and the torsion rubber spring is provided. When a torque greater than the set value is applied to the rubber spring, the damping force is increased as the torque applied increases.

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

Figure 4 is a plan view of the clutch disk assembly according to the present invention, Figure 5 is a cross-sectional view taken along line BB of Figure 4, Figures 6a to 6c is a schematic diagram showing the manufacturing process of the torsion rubber spring which is the main part of the present invention. 7 is a graph showing a characteristic curve of a torsion rubber spring, which is a main part of the present invention.

The clutch disc assembly according to the present invention has a clutch contact portion 231, a disc plate 232, a sub plate 233, a hub 234, a hub plate 235, and rapid torque, as shown in FIGS. 4 and 5. It consists of a plurality of torsion rubber springs (236) to improve damping performance during transmission.

Here, the clutch contact portion 231 is configured to include a pacing 240 to which torque is transmitted by frictional contact with the flywheel, and a cushion plate 241 to which the pacing 240 is fixed. Plate 241 is secured to disk plate 232 by cushioning rivets 239.

Next, the disc plate 232 is fixedly coupled to the sub plate 233 by the stopper pin 238 so as to be integrally rotated with the sub plate 233.

At this time, the disk plate 232 and the sub-plate 233 are formed with a plurality of slit holes in the circumferential direction.

Next, the hub 234 has a through hole formed in the axial direction so that the main drive shaft can be penetrated at the center thereof, and a main drive shaft (not shown) for transmitting power to the transmission mechanism is splined to the through hole of the hub 234. And a through hole formed at the center of the disc plate 232 and the sub plate 233.

Next, the hub plate 235 is a disk-shaped plate formed to extend on the outer circumference of the hub 234 is installed between the disk plate 232 and the sub plate 233, the disk plate 232 and the sub The plate 233 is installed so as not to be coupled with each other.

At this time, the hub plate 235 is formed with a plurality of slit holes in the circumferential direction.

Of course, the hub plate 235 is an embodiment formed integrally with the hub 234, but is not necessarily limited to this may be present separately.

Next, the torsion rubber spring 236 is inserted into the slit holes of the hub plate 235 and the disc plate 232 and the sub plate 233 to buffer rapid torque transmission, and a torsion spring in the form of a general coil spring ( The rubber 236b is formed to be pressed under the pressure 236a.

Specifically, the torsion rubber spring 236 has a cavity (C) formed therein as shown in Figure 6a and 6b and a fixed mold formed with a rubber injection hole (I) in communication with the cavity (C) on one side 252 and the moving mold 254 are engaged, and the rubber 236b is introduced into the cavity C through the rubber inlet I while the torsion spring 236a is embedded in the cavity C. Injection and pressure injection molding.

At this time, since the outer periphery of the torsion spring 236a is engaged with the cavity C, or the rubber 236b is injected in a state where it is positioned to maintain a predetermined gap, the outer periphery of the torsion spring 236a has a thin thickness. A rubber film is formed and manufactured to be uniform in diameter.

As shown in FIG. 7, the manufactured torsion rubber spring 236 has a constant rate of increase in rotational angle with respect to an increase rate of torque when a torque less than a set value (To) is applied, as shown in FIG. 7. When a torque greater than or equal to the set value To is applied, the increase rate of the rotation angle with respect to the steam ratio of the torque decreases.

That is, the torsion rubber spring 236 provides a constant damping force when a torque of less than the set value (To) is applied, while providing a higher damping force when a torque of more than the set value (To) is applied to increase the rotation angle. Will reduce the ratio.

Of course, the set value (To) in the torsion rubber spring 236 is a value that can vary according to a design factor, and may be manufactured to vary depending on the material of the torsion spring 236a and the rubber 236b.

Looking at the power transmission path and the action of the torsion rubber spring of the clutch disk assembly configured as described above, the torque transmitted to the facing 240 is the cushion plate 241, disk plate 232 and sub-plate 233 After passing through one end of the torsion rubber spring 236, the torque is buffered in the torsion rubber spring 236, and the other end of the torsion rubber spring 236 pushes the hub plate 235 to the The hub plate 235 and the hub 234 are rotated, and at the same time, the main drive shaft of the transmission mechanism splined to the hub 234 is rotated.

At this time, when the torque less than the set value (To) is transmitted from the torsion rubber spring 236, the torque is attenuated and transmitted by the elastic force of the spring in the circumferential direction along the torsion spring (236a), the torque of the set value (To) or more When the torque is transmitted, the torque is attenuated and transmitted by the elastic force of the spring in the circumferential direction along the torsion spring 236a, and at the same time, the rubber 236b is temporarily attenuated and transmitted as it is stored and released as elastic energy. Is delivered.

Therefore, the clutch disk assembly to which the torsion rubber spring is applied as described above may absorb and transmit shock by the torsion spring and rubber when excessive torque is applied, thereby maintaining vibration and noise by maintaining excellent damping performance.

Clutch disc assembly according to the present invention is configured as described above is to insert a torsion rubber spring manufactured by pressing the rubber to the torsion spring so as to buffer and transfer the torque between the disc plate and the sub-plate and the hub plate more than the set value When torque is applied, the displacement increase ratio with respect to the torque increase ratio is reduced, so that excellent damping performance can be maintained even when excessive torque is applied, and further, vibration and noise can be reduced, and damage of adjacent parts can be prevented. And, there is an advantage that can reduce the production cost.

Claims (5)

A clutch contact receiving torque by frictional contact; A hub plate having one side fixedly coupled to the clutch contact portion to form a plurality of slit holes in the circumferential direction and an axial through hole formed at the center thereof; A disc plate and a sub plate disposed on both sides of the hub plate with a plurality of slit holes formed in a circumferential direction at a position corresponding to the slit holes of the hub plate, and each having an axial through hole formed in the center thereof; A hub installed to penetrate through the axial through-holes of the hub plate, the disc plate and the subplate, and coupled to the disc plate and the subplate; And a plurality of torsion rubber springs inserted into the slit holes of the hub plate and the disc plate and the subplate to buffer rapid torque transmission. The method of claim 1, The torsion rubber spring (Torsion rubber spring) is a clutch disk assembly characterized in that the rubber is injected into the mold (Rubber) in the state in which the torsion spring (Torsion spring) is built in the mold. The method of claim 1, The torsion rubber spring (Torsion rubber spring) is a clutch disk assembly, characterized in that the rubber film of a predetermined thickness is formed on the outer periphery of the torsion spring and the diameter is made uniform. The method of claim 1, The torsion rubber spring provides a constant damping force when a torque below a set value is applied, and provides a damping force greater than a constant damping force when a torque above a set value is applied. . The method of claim 4, wherein The torsion rubber spring (Torsion rubber spring) is a clutch disk assembly, characterized in that to provide a damping force that is greater as the torque applied when the torque exceeds the set value.