JPS592336Y2 - clutch disc - Google Patents

Description

[Detailed description of the invention] The present invention relates to a clutch disc for an automobile that frictionally connects a drive plate connected to an engine crankshaft and a transmission input shaft, particularly a friction plate, and a torque damper that connects the drive plate to the transmission input shaft. Relates to a type of theme hub.

Generally, the disc bub of the above-mentioned type of clutch disk is slidably spline-fitted to the transmission input shaft so that the friction plate can be engaged with and separated from the drive plate.
Since there is an unavoidable play in the spline fitting part due to machining, the clutch disc may cause rotational vibration due to severe rotational fluctuations of the crankshaft, especially during no-load engine operation, and the gap between the clutch disc and the transmission input shaft A banging noise is generated.

The present invention aims to provide a clutch disc that can effectively prevent the occurrence of knocking noise at the spline fitting portion, and also suppress the blind motion of the torque damper to prevent its wear and generation of vibration noise. purpose.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Reference numeral D indicates a clutch disc, which is composed of an annular friction plate 1 and a disc bub 3 connected to the annular friction plate 1 via a torque damper 2.

When the friction plate 1 is squeezed between the drive plate and the pressure plate (both not shown) connected to the engine crankshaft (clutch-on state), when a load is applied to the engine, the crankshaft increases in size. The rotation torque can be buffered by the torque damper 2 and transmitted to the transmission input shaft 4 which is spline-fitted to the disc bub 3, and when the friction plate 1 is released from the pressure plate (clutch off state), It is possible to cut off the connection between the crankshaft and the transmission input shaft 4.

As the clutch turns on and off, the disc bub 3 slides on the transmission input shaft 4 in the axial direction.

In the illustrated example, the torque damper 2 is a short cylinder made of rubber, and retaining plates i are integrally fixed to both end surfaces of the damper 2 in the longitudinal direction.

Each of the dampers 1 to 2 has both retaining plates 5 in a plurality of openings 3a formed at equal intervals in the circumferential direction of the clutch disk.
These are accommodated with a certain clearance s, s between the disc circumferential inner end surface in the disk circumferential direction of the opening 3a facing these, and a pair of buffer coils are interposed in the clearances S, S, respectively. do.

One end of each buffer coil spring 6 is positioned by fitting into a protrusion 3b formed on the inner end surface of the opening 3a.

The pair of coil springs 6 support both ends of the torque damper 2 in a floating manner.

A part of the outer peripheral surface of the torque damper 2 is a support plate 7 of the friction plate 1,
and engagement holes 7a and 'ga' formed respectively in the presser plate 9 connected to the plate 7 by a plurality of pins 8.
The retaining plates 5, 5 are exposed from the respective engaging holes 7a, g.
The clutch disk of a is held on both inner end surfaces in the circumferential direction without any play.

In the above coil, the spring force of the spring 6 is set to be weaker than the stiffness force of the I-lux damper 2.

Since the present invention has the above-mentioned configuration, when the transmission is in a neutral state, for example, when the engine is idling under no load and rotational fluctuations occur in the crankshaft, the resulting vibrations will cause the torque damper 2 to The vibrations are transmitted to the disc hub 3 through the shock absorbing coil spring 6.
effectively absorbed by.

In addition, the blind motion of the torque damper 2 with respect to the disc hub 3 is
The torque damper 2 is suppressed by a buffer coil spring 6 that supports both ends of the torque damper 2 in a floating manner.

In the present invention, the torque damper 2 is not limited to a rubber cylinder, but may also be a coil spring.

Further, the buffer coil spring 6 may be replaced with elastic plastic or elastic rubber.

As described above, according to the present invention, in a clutch disk consisting of a friction plate 1 and a disk hub 3 connected to the friction plate 1 via a torque damper 2, the torque damper 2 is inserted into the opening 3a provided in the disk hub 3. The damper 2
There are clearances S, S between both ends of the clutch disc in the circumferential direction and the inner end surface of the opening 3a in the circumferential direction of the clutch disc, respectively.
, a pair of buffer springs 6, 6 whose spring force is weaker than that of the torque damper 2 are interposed, and the torque damper 2 is supported in a floating manner by these springs 6, 6, and the clutch disk of the torque damper 2 is Engagement holes 7 a provided in the friction plate 1 at both ends in the rotational direction.
, ga was held without any play, so due to fluctuations in the rotation of the crankshaft during engine idling, etc.
Even if fluctuations occur in the transmission torque applied to the friction plate 1, the torque fluctuations can be effectively absorbed by the pair of buffer springs 6 that floatingly support the torque damper 2, and as a result, the torque fluctuations are As such, the torque is not directly transmitted to the disk hub 3 via the torque damper 2, and this prevents hitting noise from occurring at the spline fitting portion between the disk hub 3 and the transmission input shaft 4, and also prevents the noise from occurring at the spline fitting portion of the fitting portion. Durability can be increased.

Moreover, since the I-Rukdan Pa 2 is held by the friction plate 1 without any play in the disk circumferential direction, and is floatingly supported by the disk hub 3 via the spring 6, it cannot be attached to either the friction plate 1 or the disk hub 3. Therefore, it is possible to prevent noise generation due to blind movement of the torque damper 2 and wear of the torque damper 2 itself.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of one embodiment of the latch disk of the present invention, Fig. 2 is a sectional view taken along the line ■I-■I of Fig. 1, and Fig. 3
The figure is a sectional view taken along the line III--III in FIG. 1. 1...Friction plate, 2...Torque damper,
3... Disc hub, 3a... Opening,
S... Play space, 6... Buffer spring, 7a
, ga...Engagement hole, D...Clutch disk.

Claims (1)

[Scope of utility model registration request] In a clutch disk consisting of a friction plate 1 and a disc bub 3 connected thereto via a torque damper 2, the torque damper 2 is inserted into an opening 3a provided in the disc bub 3 in the direction of the clutch disc circumference of the damper 2. A clearance S is provided between both ends and an inner end surface of the clutch disk in the circumferential direction of the opening 3a, respectively, and the clutch disk is accommodated therein.
A pair of buffer springs 6, 6 whose spring force is weaker than that of the torque damper 2 are respectively interposed in the clearances S, S, and the torque damper 2 is supported in a floating manner by these springs 6, 6. Furthermore, the torque damper 2
Both ends of the clutch disk in the circumferential direction are connected to the friction plate 1.
A clutch disc characterized by being held without any play in retaining holes 7a and ga provided in the clutch disc.