FR2957125A1 - Simple or double locking clutch for automated transmission of motor vehicle, has shouldered stems fixed on disk parallel to axles that carries rings gripping periphery of spring with inner side inserted in groove of sliding ring - Google Patents

Abstract

The clutch has a flying disk (1) in which a disk (7) is axially moved, where the disk presses a receiving disk (4). Shouldered stems (10) are fixed on the disk parallel to axles (23) that carries two rings (12, 13) gripping a periphery of a diaphragm spring (20) with an inner side inserted in a groove of a sliding ring (21). The ring is meshed internally with rocker arms (22) compelled to turn around the axles integrated to the flying disk and meshed internally with a toric cam (28).

Description

2957125

In automated transmissions of common motor vehicles, the transmission ratio changes are effected by means of friction members, brakes and clutches, operating in the oil and actuated by hydraulic cylinders fed by a pump, antagonists of springs active or recall.

Their maintenance in any state, coupled or uncoupled, causes an undesirable consumption of energy.

It is proposed here a locking device combined with the covering of a diaphragm spring ensuring the progressivity and maintenance of the coupling. As a result, the actuator, external to the clutch, is not loaded, and therefore only consumes energy, for the change of state.

The application of the same principle can be made to a double clutch of the kind used in transmissions in which the torque alternately passes from one receiving shaft to another, the gear change being made in anticipation on the free shaft. .

Although the justification of the invention as presented involves dry running, its principle can easily be transposed to a clutch operating in mono or multi-disc oil.

Figures 1 to 6 of the plate 1/1 show a single or double clutch, single locking disc of a first principle.

Figures 7 to 10 of Plate 1/1 show a second locking device.

The driving part, integral with the drive shaft (2) consists of the flying disc (1) inside which slides the disc (7). (1) and (7) are rotatably connected by the splines (8).

The driven part, secured to the receiving shaft (6) consists of the disc (4). (4) and (6) are rotatably connected by the splines (5). Stepped stems (10) are fixed through parallel bores on the disc (7) by means of tubular nuts (11), while on the other side a stack is formed by means of two rings (12) and (13) clamped by the nut (14), pinch the periphery of the diaphragm spring (20).

The diaphragm spring (20) has radial arms of equal strength connected by an outer or inner ring.

The inner part of (20) is inserted in the groove of the ring (21) whose inner profile meshes with a conjugate profile housed at the end of the radial arm of a number of rockers (22) which rotate around the axes (23) carried by the ears (25-1) part of the cover (25) integral with the flying disc (1). The rockers (22) carry at the end of each of their axial arms, arranged symmetrically with respect to the axis (23), an axis (26) around which the rollers (27) rotate.

Said rollers mesh with the flanks of an O-ring (28), of conjugated profile, coming from the sliding sleeve coaxial with the drive shaft (2) and receiver (6) carrying the inner ring of the rotary stop (30), the outer ring carrying the annular control bracket (31).

The stirrup (31) has an annular groove on the flanks of which an outer fork actuates the clutch by moving the cam (28) in one direction or the other, causing the rockers (22) to reach their position. self-locked.

The configuration shown in Figure 1 corresponds to the non-coupling. The cam (28) is advanced in the intermediate position under the rockers (22) placed in neutral position, the diaphragm spring (20) is free and the disc (4) uncoupled.

The configuration shown in Figure 4 corresponds to the coupling. The cam (28 is retracted, the rockers (22) swing forward, pushing the spring (20) to the left, the disk (4) is pressed and thus coupled In a version desired by the inventor, the figure 1 (lower part) 10 also shows a double clutch A friction disc (40) rotatably connected to a second tubular receiving shaft (41) is arranged symmetrically with respect to the sliding disc (40) at the single clutch (7). ) and pressed against the cover disc (42) fixed on the disc

Flywheel (1) The coupling of the output shaft (6) is obtained when the cam (28) assumes a rear position, while the coupling of the output shaft (41) is obtained when the cam (28) takes a position before. The shafts (6) and (41) are uncoupled when the cam (28) is in the intermediate position.

Referring to Figure 6 of Plate 1/1 is shown a preloaded spring principle reducing the stroke of the control system.

Two diaphragm springs (32) are held apart on their inner circumference by means of a free ring (33) while they are brought together on their outer circumference by means of two opposing flanges (34) which bear against each other. inside on the ring (35) and on the outside on the rings (36) and (37) substituting for (12) and (43). The rollers (27) can be removed and replaced by an equivalent profile cut on the rocker.

Referring to Figures 7 to 10 of the 1/1 board there is shown a variant to achieve the locking.

The sheath (38) acting as the cam (28) carries a groove of third circle profile in which partially insert balls (39) which remain permanently captive holes made in the sliding ring (43) secured to the part 10 inside the diaphragm spring (20).

The clutch assembly is locked by the axial movement back and forth of the sleeve (38) which drives the member (43) forward or backward.

The balls pushed by the opposing force of the diaphragm spring (20a), in one or other of the grooves (45, 46) formed on the ring (47) integral with the flying disc (1) lock in their extreme position. the ring (43).

In view of the travel required to operate the mechanism, the diaphragm spring (20a) constitutes a race-reducing lever. The diaphragm spring (20a) bears on a diameter close to the outside on two bosses facing each other (44) and (48) integral with the flying disc (1). The arms of the diaphragm spring (20 bis) are of equal strength, hence their diamond shape.

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Claims (1)

Claims 1: Single or double interlocking clutch, consisting of a flying disc (1) inside which can move axially a disc (7) for pressing a receiving disc (4) characterized by shouldered rods (10) fixed on (7) parallel to the axis which bear on their emergent part two rings (12) and (13) pinching the periphery of a diaphragm spring (20) whose interior is inserted in a groove of the sliding ring (21) . Claim 2: Clutch single or double lock according to claim 1 characterized in that the ring (21) meshes internally with rockers (22) constrained to rotate about axes (23) secured to the disk (1) and which mesh with their turn internally with an O-ring (28) connected by the rotating stop (30) to the annular control bracket (31). Claim 3: Single or double interlocking clutch according to Claim 1, characterized in that a friction disk (40) rotatably connected to a second tubular receiving shaft (41) is arranged symmetrically with respect to the sliding disk (4) at the single clutch (7) and pressed against the cover disc (42) fixed on the flying disc (1) Claim 4: Single or double interlocking clutch according to claims 1 and 4 characterized in that the coupling with the receiving shaft (6) is obtained by means of the cam (28) which takes a rear position while the coupling with the receiving shaft (41) is achieved by means of the cam (28) which takes a forward position. Claim 5: Single or double interlocking clutch according to Claim 1, characterized in that the diaphragms (32) are kept spaced apart on their inner circumference by means of a free ring (33) while they are brought close together on their outer circumference. means of two opposite flanges (34) which bear, inside on the ring (35) and outside on the rings (36) and (37). 6 2957125 Claim 6: Clutch single or double lock according to claim 1 characterized in that the sheath (38) carries a throat profile of a third circle in which are inserted partially balls (39) trapped holes in the ring slider (43) integral with the spring (20). Claim 7: Single or double interlocking clutch according to Claim 1 and 6, characterized in that the locking of the clutch is obtained by means of third-circle grooves (45) and (46) formed on the integral ring (47). of the flying disc (1) in which, at the end of travel of the sleeve (38), partially insert the balls (39).