FR2576987A1 - Clutch system with disc and plates - Google Patents

Abstract

Clutch system with discs and plates. Clutch system, for all motor vehicles, in which repair, in the event of wear of the friction elements, is made solely by replacing six pairs of plates 2; the latter are fixed to the disc 1 by six links 3, which disc, during this operation, remains in place, free, in the released position. A hatch in the engine casing, in line with the disc gives access to it.

Description

DESCRIPTION
The clutch system, object of the present invention, differs from any other system firstly by its disc (1) whose friction elements or plates (2) fixed 1 to this by links (3) are exchangeable and secondly by making a rectangular hatch in the upper part of the engine casing to the right of the clutch disc (1) in order to allow the passage of the pads (2) and their mounting; during this opdirai: ion the disc (1) originally mounted remains in place.

The present system is adaptable without major modification on vehicles having a cage of openwork clutch of 3 lights?
The exchange of platelets takes place as follows:
First perform a rotation of the engine (by acting on one of the driving wheels or by pushing the vehicle slightly, in gear on the third or fourth gear) to bring one of the three lights of the clutch cage opposite the access hatch .

 Secondly, disengage, maintain the position by pinning the pedal, and in the same way as previously perform a rotation of the disc to bring in front of the opening one of the 6 six pairs of pads; proceed to its exchange then perform a second rotation for the next pair and so on.

 Figure 1 shows the disc assembly, pads, links.

Figure 2 is a section of the assembly
Figure 3 shows the disc seen from the front and Figure 4, this one seen from above.

 FIG. 5 represents a plate seen from the front, from above and from below.

 Figure 6 shows a link, its plywood and its pin in different views.

 The disc (1) is mainly composed of a thin steel flange, having 12 holes (6) for fixing the plates (2). The purpose of the cutouts is to reduce the weight and give it flexibility at the fixing points to correct, by deformation, the center distance deviations in order to facilitate the mounting of the links! 3); these cutouts are slightly folded in the shape of a fan (figure 4) which provides a certain elasticity in thickness, sufficient to eliminate the play between the disc, the pads and the links in order to reduce vibrations.

 A central grooved ring (7) is intended to receive the drive shaft. The disc may include a spring cage system (not shown in the figures) for damping transmission forces.

 The pads (2) are essentially composed of a friction material having good qualities of adhesion and mechanical resistance.

 Each plate has two fixing holes located outside the friction surface (contact surface with the flywheel (8) and the clutch release plate (9): these two elements do not undergo any modification). A space between each plate is reserved for the evacuation of wear dust in order to avoid fouling.

 The links (3) are each composed of two axes, made of steel, riveted to a plate, a plywood (4) and a pin (5); they fix the six pairs of pads on the disc and mainly take up the forces due to centrifugal force, the rotational drive force being mainly taken up by the adhesion between the disc and the pads during clutching.

Claims (7)

i) Plate clutch characterized by its clutch disc (1) on which six pairs of plates (2) or friction elements are fixed, by means of six links (3). 2) A clutch plate according to claim i characterized by its disc (i) provided with special cutouts providing flexibility of center distance at the pad attachment points (2) to facilitate the mounting of the links (3). 3) A plate clutch according to claim i or 2, characterized in that the special cutouts of the disc (i) are slightly fan-folded in the thickness direction, in order to eliminate the play between the disc (1) and pads (2) and also provide some elasticity after assembly. 4) A plate clutch according to one of the preceding claims, characterized by its modular friction elements in the form of plates (2), of a sixth crown, each having two fixing holes located outside the friction surface. 5) plate clutch according to one of the preceding claims caracXtérisve by the method of fixing the plates (2) on the disc (1) provided by links (3), identical to those of a transmission chain; the technical characteristic residing in their use for this specific case.  6) A method of repairing the clutch according to the precerjentes claims taken as a whole, characterized by replacing only the pads (2) al.ors that the disc (i) originally mounted on the vehicle, remains in place during this operation, in the disengaged position. For this purpose the clutch cage must be perforated with three lights. 7) Repair method according to claim 6, characterized by the realization, in the crankcase, to the right of the clutch disc (1), an access door to the mechanism, specific to the replacement of the pads (2).