JPH0429133Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] This invention relates to a clutch disk.

[Prior Art] Generally, when power is transmitted from the output shaft of the engine to the transmission via the clutch mechanism, fluctuations in the transmitted torque due to engagement and disconnection of the clutch mechanism are absorbed by a rotational direction buffer mechanism of the clutch disk. ing. This rotational direction damping mechanism is composed of an elastic body such as a cushion spring that is interposed in the circumferential direction between the clutch hub, the disk plate, and the sub-plate, and torque fluctuations are absorbed by this elastic body.

On the other hand, due to this elastic body, a torsional vibration is generated in the clutch disk due to a deviation in the relative angle of rotation that occurs between the clutch hub, the disk plate, and the sub-plate, and a rattling sound is generated in the transmission gear. This was a contributing factor. In addition, to prevent the occurrence of torsional vibration, it is preferable to create a clutch disc with low torsional rigidity, but in order to create a clutch disc with low torsional rigidity, it is necessary to create a clutch disc with low hysteresis torque in the low rotation range. must be configured.

Therefore, in the past, various low hysteresis torque clutch discs have been devised to prevent tooth rattling noise in the transmission gear, but on the other hand, high hysteresis torque clutch discs have been developed to smooth the engagement and disconnection of the clutch in the high rotation range. Preferably,
For this reason, it has not been possible to create a clutch disk that has both of these characteristics, that is, low hysteresis torque in the low rotation range and high hysteresis torque in the high rotation range.

[Purpose of invention]

In view of the above-mentioned problems, the object of this invention is to provide a clutch disc with low hysteresis torque in the low rotation range and high hysteresis torque in the high rotation range.

[Structure of the idea]

In order to achieve the above-mentioned purpose, this invention:
A pressure contact means is interposed between the clutch hub and the disc plate to increase the bonding force between the clutch hub and the disc plate in accordance with the rotation speed of the clutch hub.

〔Example〕

Hereinafter, one embodiment of the clutch disk according to the present invention will be described in detail.

FIG. 1 is a sectional view showing a clutch disk 10 of the present invention.

This clutch disk 10 includes a disk plate 14 having facings 12 attached to both circumferential surfaces thereof.
It has a sub-plate 18 which is integrally connected to this disc plate 14 by a pin 16, and a clutch hub 22 whose flange portion 20 is sandwiched between this sub-plate 18 and the disc plate 14. There is. Further, a plurality of rotational direction buffer members 24 made of coil springs or the like are interposed between the disc plate 14, the sub-plate 18, and the flange portion 20 of the clutch hub 22, and torque fluctuations are transmitted to the disc plate 14 via the clutch hub 22. I am trying to alleviate this. On the other hand, a pressure contact means 30 is disposed between the boss portion 22a of the clutch hub 22, the flange portion 20, and the sub-plate 18.
The sub-plate 18 and the clutch hub 2 through
The flange portions 20 of No. 2 are connected to each other. In addition,
The pressure contact means 30 are provided at at least three locations along the circumferential direction of the boss portion 22a between the flange portion 20 and the sub-plate 18 at equal or predetermined intervals.

This pressure contact means 30 is connected to the boss portion 22 of the clutch hub 22 as shown in FIG.
a hole 32 drilled in the radial direction of the hole 32;
Due to the resilient member 34, which is a coil spring, disposed in this hole 32 and the pressing force of this resilient member 34, a spring is constantly formed on one side wall surface 20a of the flange portion 20 and the side surface of the sub-plate 18. Tapered surface 1
8a, and a pressure contact member 36 that is press-fitted between the contact member 8a and the contact member 8a. Note that this pressure contact member 36 is formed of a steel ball. In addition, the reference numeral 14a in FIG.
A plurality of convex portions are formed on the circumferential surface of the disc plate 14 at predetermined intervals, and the tips of the convex portions 14a are in close contact with the flange portion 20 of the clutch hub 22.

Next, the operation of the clutch disc 10 described above will be explained, and the structure will also be explained in more detail.

According to the above-described configuration, when the clutch hub 22 is in a stopped state and is in a low rotation range, the pressing force of the resilient member 34 causes the pressing member 36 to press against the taper of the one side wall surface 20a of the flange portion 20 and the sub-plate 18. It comes into close contact with the surface 18a. Therefore, the pressing force in the radial direction by the resilient member 34 is converted into the thrust direction by the pressing member 36,
The pressure contact force of the pressure contact member 36 allows the flange portion 20 of the clutch hub 22 and the sub-plate 18 to be adjusted appropriately.
Therefore, by appropriately setting the spring constants of the rotational direction buffer member 24 and the elastic member 34, a clutch disk 10 with low hysteresis torque can be obtained in the low rotation range. On the other hand, when the clutch hub 22 reaches the high rotation range,
Further centrifugal force is applied, and the pressure contact member 36 is brought into close contact with the one side wall surface 20a and the tapered surface 18a of the sub-plate 18 with stronger radial pressure contact force, so that the flange portion 20 of the clutch hub 22 and the sub-plate 18 are brought into contact with each other via the pressure contact member 36. A strong bonding force with the plate 18 is obtained, and therefore a clutch disk 10 with high hysteresis torque in a high rotation range is obtained.

In the above embodiment, the pressure contact means 30 is disposed on the boss portion 22a between the flange portion 20 of the clutch hub 22 and the sub-plate 18, but the invention is of course not limited to the above embodiment, and the pressure contact means 30 30 may be arranged in a bus section between the flange section 20 of the clutch hub 22 and the disk plate 14. In this case, disk plate 1
Needless to say, a tapered portion 18a similar to that of the sub-plate 18 is formed at a predetermined position of 4.

[Effect of idea]

As explained above, since the pressure contact means consisting of a coil spring, a steel ball, and a tapered part is interposed between the flange of the clutch hub and the sub-plate or between the flange of the clutch hub and the disc plate, As the rotational speed of the clutch disk increases, the coupling force between the flange portion and any of the plates mentioned above increases in proportion, and a clutch disk with low hysteresis torque in the low rotation range and high hysteresis torque in the high rotation range can be obtained. This prevents the rattling sound of the transmission connected to the clutch disc in the low rotation range, and allows smooth engagement and disconnection of the clutch in the high rotation range.
It becomes what is called a sharp clutch.

In addition, since steel balls are used as the pressure welding means, when the rotational speed suddenly changes and a large relative rotation angle occurs between the flange and either of the plates, the steel balls will Since it rolls circumferentially between surfaces, it has excellent wear resistance and does not cause excessive frictional braking, allowing the clutch disc to respond smoothly.

Furthermore, by setting the tapered portion at an appropriate angle, it is possible to easily design a clutch disk that always provides optimal hysteresis characteristics as the state of low speed rotation changes to the state of high speed rotation.

[Brief explanation of the drawing]

1 and 2 are a sectional view and an enlarged view of the main parts of a clutch disk according to the present invention, respectively. DESCRIPTION OF SYMBOLS 10...Clutch disk, 14...Disc plate, 18...Sub plate, 18a...Tapered part, 20...Flange part, 22...Clutch hub, 22a...Boss part, 30...Pressure means, 3
2... Hole, 34... Resilient member, 36... Pressing member.

Claims (1)

[Claims for Utility Model Registration] The disc plate 14 and the sub-plate 18 are sandwiched between the flange portion 20 of the clutch hub 22.
and the clutch hub 2.
A rotational direction buffering mechanism 24 is interposed between the disk plate 14 and the sub-plate 18, so that the driving force transmitted to the clutch hub 22 is rotated in the rotational direction. In the clutch disk in which the transmission is transmitted to the disk plate 14 via the buffer mechanism 24, between the boss portion 22a of the clutch hub 22 and its flange portion 20 and the disk plate 14,
or in a hollow portion formed between the boss portion 22a of the clutch hub 22 and either one of the flange portion 20 thereof and the sub-plate 18;
A hole 32 bored in the boss portion 22a and the hole 3
2 and a tapered portion 18 formed in one of the plates.
A and a steel ball 36 pressed by the coil spring 34.