JPS5841386Y2 - friction clutch disc - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a friction clutch disk used in automobiles and the like.

Friction crack discs for automobiles are provided with vibration absorbing means to prevent noise caused by vibrations of drive systems such as engines.

However, there are cases where conventional vibration absorbing means alone cannot completely prevent noise.

In other words, since the vibration absorbing means is mainly installed as a vibration damper when the transmission torque is large, such as during normal operation of the drive system such as the engine or during normal running of a single-wheeled vehicle, it is difficult to shift gears when the vehicle is coasting. During operation.

When the transmission torque of the clutch is zero or small near zero, such as during engine braking, a sufficient effect cannot be obtained, especially against abnormal noises generated from the transmission.

In view of the above-mentioned drawbacks of the conventional technology, the present invention has been developed to eliminate so-called neutral noise, which is generated when a vehicle such as an automobile is coasting or driving, especially noise generated from the transmission, and when the engine idles. The purpose is to obtain a clutch disc that can prevent friction.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

In the embodiment shown in FIG. 1, 1 is a transmission input shaft formed with splines, 2 is a clutch disk to which friction plates 3, 3 and a torsion spring 9 are attached, and 4 is the clutch disk 2 connected to the input shaft 1. Spline 5 to fit
The splines 5 of the clutch hub 4 are formed to have a desired relative play in the rotational direction with respect to the input shaft 1 to which the clutch hub 4 is fitted.

A side hub 6 is provided on the side of the clutch hub 4 and has a stepped portion 6b.
a has a spline 7 slidably fitted to the input shaft 1;
is formed.

Note that this spline 1 prevents relative play in the rotational direction from the input shaft 1 to which it is fitted, at least to the extent that the clutch hub 4
The relative movement between the spline 5 and the input shaft 1 is set to be smaller than the relative movement between the spline 5 and the input shaft 1.

Reference numeral 8 denotes a rubber elastic member which is vulcanized and bonded to the side surface of the clutch hub 4 and the side hub 6, respectively, and serves as a vibration damper in the rotational direction of the drive system.The spring constant of the rubber elastic member 8 in the shear direction is equal to that of the clutch disk 2 The spring constant of the torsion spring 9 is set smaller than that of the torsion spring 9.

Among these, this rubber elastic member 8 may be provided on the entire outer periphery of the side surface of the Cytono Pro, or a plurality of rubber elastic members 8 formed in a block shape may be arranged on the outer periphery of the side surface of the side bubble 6.
.

In the above configuration, the relative movement in the rotational direction between the spline 7 of the side bub 6 and the input shaft 1 is set to be smaller than the relative movement in the rotational direction between the spline 5 of the clutch bub 4 and the input shaft 1. The clutch disc 4 and the side pro are connected by a rubber elastic member 8, and since the elasticity of the rubber elastic member 8 is set smaller than the elasticity of the torsion spring 9 of the clutch disc 2,
The transmission torque characteristics of the friction clutch disc of this embodiment are as shown in FIG.

That is, in the region Ps where the torsion angle is small, the rubber elastic member 8 works to provide free movement in the rotational direction between the spline 5 of the clutch bub 4 and the transmission input shaft 1, and in the region Ts where the torsion angle is large, the clutch disc Compression of the torsion spring 9 of No. 2 is added, and the transmitted torque increases.

Therefore, when the transmitted torque is large, such as when the vehicle starts or normally runs, the torsion spring 9 is compressed together with the rubber elastic member 8, and the transmitted torque characteristic becomes the region Ts shown in FIG. 2, and the fluctuating torque is caused by the rubber elastic member 8 Buffered by spring 9.

In addition, when a vehicle with a small transmission torque is coasting, the transmission torque characteristic is in the region Ps shown in Fig. 2, and the rubber elastic member 8 works, so the knocking noise caused by play in the gears of the transmission, etc., is damped and generated from the drive system. Can prevent noise.

However, since the engagement and disengagement action of the friction clutch is well known, its explanation will be omitted.

Next, a different embodiment of the present invention shown in FIG. 3 will be explained.

In the description of this embodiment, the same parts as those of the previous embodiment are given the same reference numerals and redundant explanation will be omitted.

The embodiment shown in FIG. 3 is mainly different from the previous embodiment in that a step 4affi is formed on the side surface of the clutch hub 4, and a flange 6c'x is formed in the side bub 6 to cover this step 4affi. The rubber elastic member 8 is provided between the flange portion 6c and the stepped portion 4a of the clutch bub 4, and the rubber elastic member 8 is provided on both sides of the stepped portion 4a of the clutch bub 4 or the flange portion 6c of the side bub 6. They are vulcanized and bonded, or they are vulcanized and bonded to one of them and then press-fitted and fixed to the other.

As is clear from the above description, the present invention has the following effects.

(1) By attaching the side bub to the clutch bub via a rubber elastic member, vibrations generated from the drive system during driving, coasting, etc. can be buffered and noise can be prevented.

(2) Since it is only necessary to provide side panels and a rubber elastic member, the structure is simple and manufacturing is easy.

(3) Various characteristics of the transmitted torque of the rubber elastic member can be easily obtained by changing the hardness or compressibility of the rubber elastic member.

(4) A desired twist angle can be obtained by using the rubber elastic member by changing the amount of relative movement in the rotational direction of the spline of the clutch valve that fits into the transmission input shaft.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a main part showing one embodiment of the present invention, Fig. 2 is a graph showing transmission torque characteristics of a clutch disc to which the present invention has been applied, and Fig. 3 is a main part showing a different embodiment of the present invention. FIG. 1...Input shaft, 2...Clutch disc 4...
Clutch...bu, 4a...stepped part, 5...spline, 6...side bub, 6c...flange part, 7...
·spline. 8...Rubber elastic member.

Claims (3)

[Scope of utility model registration request] (1) A clutch hub that is spline-fitted to the transmission input shaft, and a crack located on the side surface of the hub that prevents relative free movement in the rotational direction between the clutch hub and the transmission input shaft. A friction clutch disk comprising a side hub that is spline-fitted so as to have little relative movement, and a rubber elastic member that connects the side hub and the crack hub and serves as a vibration damper in the rotational direction of a drive system. (2) The friction clutch disk according to claim 1, wherein the comb elastic member is vulcanized and bonded to the side plates and the clutch plate. (3) A stepped portion is formed at the end of the clutch hub, a flange portion is formed on the side hub so as to cover this stepped portion, and a rubber elastic member is provided between the flange portion and the stepped portion of the clutch hub. A friction clutch disk according to claim 1 or 2 of the utility model registration claim.