JPS5829296Y2 - clutch disk - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clutch disc for an automobile clutch, which frictionally connects a drive plate connected to an engine crankshaft and a transmission input shaft.

Generally, the hub of a clutch disc is spline-fitted to the transmission input shaft so that the friction plate can be slidably engaged with and separated from the drive plate. Because of this play, the clutch disk generates rotational vibration due to severe rotational fluctuations of the crankshaft, especially when the engine is operating under no load, and a knocking noise is generated between the clutch disk and the transmission input shaft.

The object of the present invention is to prevent the generation of such noise and provide a latch disk with an extremely simple structure.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. D indicates a clutch disk, which is composed of an annular friction plate 1 and a disk hub 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's dog The rotation torque can be buffered by the torque damper 2 and transmitted to the transmission input shaft 4 spline-fitted to the disc hub 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 huff 3 slides on the transmission input shaft 4 in the axial direction.

The friction plate 1 consists of a lining part 1a, a support plate 1b thereof, and a presser plate 1c connected to the support plate 1b by a plurality of pins 5, and the support plate 1b and the presser plate 1c are as follows:
As is clear from FIG. 2, the opening 3 of the disc hub 3
It holds the outer circumferential surface of a cylindrical rubber torque damper 2 housed in a.

Note that some play is provided between the support plate 1b and the presser plate 1c and the torque damper 2 in the rotational direction of the friction plate 1.

6 is a torsion coil spring whose spring force is weaker than that of the torque damper 2; its ring portion 6a is loosely fitted to the outer periphery of the spline fitting portion 3b of the disc huff 3 with the transmission input shaft 4; 6b and 6c are respectively engaged with the holding plate 1c of the friction plate 1 and the holes 1d and 3c formed in the disc hub 3.

Incidentally, the torsion coil spring 6 may be provided between the support plate 1b and the disk hub 3.

Further, the torque damper 2 is not limited to being made of rubber, and a coil spring may also be used.

Since the present invention has such a configuration, when the engine is operated in idling mode when the transmission is in a neutral state, that is, under no load, and severe rotational fluctuations occur in the crankshaft, the accompanying vibrations are transmitted through the torque damper 2. The vibration is about to be transmitted to the disk hub 3, but the vibration is transmitted to the torsion coil spring 6.
absorbed by the buffering action of

Therefore, according to the present invention, it is possible to prevent knocking noise from occurring at the spline fitting portion between the disc hub 3 and the transmission input shaft 4, and to improve the durability of this portion.

Further, in the clutch disc of the present invention, the ring part 6a of one torsion coil spring 6 is loosely fitted to the outer periphery of the spline fitting part 3b between the disc hub 3 and the transmission input shaft 4, and both ends 6b, 6 Since it is constructed by simply locking the clutch disc 1 to the friction plate 1 and the disc hub 3, only one torsion coil spring 6 needs to be added to the conventional clutch disc, resulting in a structure with fewer parts as a whole. It is simple, reduces costs, and facilitates work such as assembly, disassembly, and maintenance.

Additionally, with the special installation of the torsion coil spring 6, there is no need to set the spring force of some of the torque dampers 2 to be small.
And because you can install the required number of equal items,
This has the effect of reducing the load on each torque damper 2 and increasing its durability.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an embodiment of the clutch disk of the present invention, FIG. 2 is a sectional view taken along the line 1--■ in FIG. 1, and FIG. 3 is a sectional view taken along the line tn-m in FIG. 1. 1... Friction plate, 2... Torque damper, 3... Disc huff, 6... Torsion coil spring, D... Clutch disc.

Claims (1)

[Scope of utility model registration request] In a clutch disc D consisting of a friction plate 1 and a disc hub 3 connected thereto via a plurality of torque dampers 2, the ring portion 6a of one torsion coil spring 6 having a weaker spring force than the torque damper 2 is attached to the disc. A clutch disc is loosely fitted to the outer periphery of a spline fitting part 3b between a hub 3 and a transmission input shaft 4, and has both ends 6b and 6c locked to the friction plate 1 and the disc hub 3, respectively.