Fichtel & Sachs Ag

Dieter Kolb

Erich Scheer

Alfred Meyer

Bernhard Schierling

Harald Jeppe

Friedrich Kittel

Karl Muller

Dagwin Tomm

Hilmar Goebel

Gunther Rostin

Norbert Pieper

Ludwig Eberlein

Karl H Werner

Manfred Adler

Peter Eichelsberger

Kurt Schafer

Willi Trux

Erich Stark

Hans-Joachim Rothe

Peter Weber

Siegmund Gehrig

According to an illustrative example of the invention, a flywheel is screwed to a crankshaft by a central bolt. The flywheel and the crankshaft are further provided with radially extending teeth in opposite annular contact faces. These teeth are engaged such as to center the flywheel with respect to the crankshaft and to permit torque transmission between the crankshaft and the flywheel. An angular positioning pin of the flywheel engages into a pin receiving bore of the crankshaft.

Combination of a crankshaft and a flywheel

To enable prescribed functional values of pressure plate units of motor vehicle friction clutches to be observed with smaller tolerances than hitherto, it is proposed that a housing-spring component initially be pre-assembled from clutch housing (1) and diaphragm spring (7) and that this component be measured together with a master pressing plate. Geometry (diameter 25 and axial height 27) which is optimum for minimum tolerances of a contact bevel 15 is calculated by means of the measured result, and a pressing plate (13) with this bevel geometry is produced. The measured spring-housing component is finally assembled together with this specially produced pressing palte 913).

Method of assembling pressure plate units of motor vehicle friction

The friction clutch comprises a flywheel and a clutch cover which encloses a clutch disc and a presser plate pressed by a clutch main spring through the clutch disc against the flywheel. The clutch cover is fixed axially on the flywheel after the style of a bayonet catch. For this purpose the bayonet catch comprises interengaging radial projections on the flywheel and tabs which form ring groove sections on the clutch cover. The fixing of the clutch cover in the radial direction and in the circumferential direction is effected by resilient clamp elements.

Friction clutch with interlocking flywheel and clutch cover

In a friction clutch for motor vehicles the pressure plate is connected to the clutch housing for common rotation about the common axis by a plurality of leaf springs which are tangential with respect to the common axis of the clutch housing and the pressure plate. The clutch housing has a predetermined direction of rotation which results from the sense of rotation of the combustion engine which is to be connected by the respective frictional clutch to the gear box of the motor vehicle. The leaf springs have--with respect to the predetermined direction of rotation--a leading end portion and a trailing end portion. The leading end portion of all leaf spring elements are fastened to the pressure plate and the trailing end portions of all leaf springs are fastened to the clutch housing.

Friction clutch with tangential leaf springs

The pressure plate for a motor vehicle friction clutch comprises a clutch cover, a non-rotatable but axially displaceable presser plate and a diaphragm spring which is supported in the region of its external circumference on the presser plate and on a smaller diameter on the clutch cover. Securing elements retained on the clutch cover pass through openings of the diaphragm spring and hold the diaphragm spring between the two wire rings, of which the wire ring placed on the side of the presser plate is axially undulated. The regions of the wire ring which form undulation crests in relation to the diaphragm spring extend below the support faces of the securing elements. A projection is formed by bending or as additional part on the wire ring and fixes the wire ring non-rotatably.

Pressure plate for a motor vehicle friction clutch

In a friction clutch unit the axial travel of the presser plate with respect to the clutch housing is axially limited. The presser plate is connected for common rotation with the clutch housing by a plurality of tangential leaf spring elements. These leaf spring elements allow axial travel of the presser plate with respect to the clutch housing, when the clutch housing is separated from the respective driving disc. A main spring is provided which is supported on the clutch housing and acts onto the presser plate. This main spring urges the presser plate away from the clutch housing. In order to restrict the travel of the presser plate under the action of the main spring stop elements are provided axially between the spring elements and the clutch housing and tangentially between the two ends of the respective leaf spring elements, namely nearer to that end of the respective leaf spring element which is fixed to the clutch housing. In assembling the friction clutch one can preassemble the presser plate with the leaf springs and thereafter insert the presser plate with the leaf springs into the clutch housing. Hereupon the free ends of the leaf springs are fixed to the clutch housing. The insertion of the presser plate with the leaf springs into the clutch housing requires only an axial movement of the presser plate with respect to the clutch housing along the common axis of the clutch housing and the presser plate.

Friction clutch unit with a stop element for limiting presser plate

A disengaging device is used with a frictional clutch which includes a rotating member displaceable in the direction of its axis of rotation. The disengaging device provides a releasable locking connection between the rotating member and a gear case, and includes a first part and a second part each coaxial with the axis of rotation and with the second part laterally enclosing the first part. At least one opening extends through the outer second part and is located opposite a groove or recess in the inner part. A locking member is passed through the opening into locking engagement with the groove or recess in the first part for preventing relative axial displacement between the two parts. The locking member can be removed for separating the two parts.

Disengaging device

A clutch mechanism particularly suited for motor vehicles is structured to include a roller bearing assembly which is composed of a rotary member, a stationary or nonrotative member and roller bodies operatively interposed therebetween. Clutch actuation is effected by axial movement of the roller bearing assembly in order to bring the rotating member into position relative to the clutch releasing mechanism. The roller bearing assembly is mounted on a guide element which includes a clutch control device and an annular connecting member is interposed between the guide element and the stationary member of the roller bearing assembly in order to transmit clutch actuating forces therebetween. The connecting member is configured to maintain the guide element and the stationary member rotatively fixed relative to each other while allowing free radial movement therebetween. The connecting member is particularly formed to include first and second portions which are radially and circumferentially displaced relative to each other about the annular connecting member, with the first portions being in fixed rotative engagement with the guide element and with the second portions being in fixed rotative engagement with the stationary member of the roller bearing assembly.

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Bad Kissingen, Germany

Dieter Kolb