The present invention relates to a disk clutch comprising a first disk set (32) which is connected rotationally fixed to a first disk carrier (18) and a second disk set (42) which is connected rotationally fixed to a second disk carrier (24), wherein the disks (34 through 40, 46 through 52) of the two disk sets (32, 42) may be brought into frictional engagement with one another via friction surfaces (54, 56), wherein recesses and/or grooves are provided in at least one or more friction surfaces (54, 56) of the disks (34 through 40; 46 through 52) of the first and/or second disk sets (32; 42). A first type of recesses and/or grooves (68) is thereby provided, which is generated by a material shaping and/or a material casting and/or a non-material removing first manufacturing method, and a second type of recesses and/or grooves (70) is provided, which is generated by a material removing second manufacturing method. In addition, the present invention relates to a disk (66) for such a disk clutch and a method for producing such a disk clutch (2) and such a disk (60).

An actuator includes a first ball-ramp plate, a second ball-ramp plate, and a plurality of balls. The first ball-ramp plate is formed of compressed powdered metal with ramps having a higher density than at least part of a remainder of the ball-ramp component. A method of manufacturing the actuator includes compacting a metal powder to form a blank of the first ball-ramp plate including an annular body disposed about an axis and a plurality of ramps fixedly coupled to the annular body and spaced circumferentially about the axis, and locally densifying the ramps of the blank by applying force to a ramped surface of each ramp.

A centrifugal clutch (1) for a drive train of a motor vehicle, has an input component (2) which serves for the introduction of torque, an output component (3) which serves for the discharge of torque. The clutch includes an engine-side centrifugal mass (5) and a transmission-side centrifugal mass (6) for actuating the friction unit (4), which centrifugal masses (5; 6) are operatively connected to an engine-side and transmission-side bent sheet metal piece (7, 8). At least one of the centrifugal masses (5; 6) has a cut-out (9) which is such that at least one device (10) which is fixed to the input component has an arm (11) which engages into the cut-out (9) in such a way that guidance of the radial displacement of at least one of the centrifugal masses (5; 6) is ensured.

A floating disc brake includes a yoke supported to the support in an axially movable manner, the yoke including a pad support portion that supports an outer pad on an axially outer side of the outer pad. The outer pad includes, on its axially outer surface, a pair of pad-side engagement portions formed of an elastic material. The pad support portion has a support hole that is open on at least an axially inner surface of the pad support portion, and the support hole is provided with a pair of yoke-side engagement portions on inner side surfaces of the support hole that face each other in a circumferential direction. The pair of pad-side engagement portions and the pair of yoke-side engagement portions are concavo-convex engaged with each other in the circumferential direction.

Multi-disc clutches are known which usually have a first clutch pack consisting of steel discs and a second clutch pack consisting of friction discs. A disc for a multi-disc clutch is proposed, which has a disc body. The disc body is in a form of an annular disc, and has a driver contour on its inner circumference and/or outer circumference for mounting the disc in a rotationally fixed manner. The disc body is formed by edgewise rolling on the inner circumference thereof.

A ramp actuator has a pivotable ramp disc, which on a first end face has at least one ramp, which is prepared for the rolling of a rolling body and, spaced apart therefrom, has a raceway for bearing rolling bodies of a rolling bearing prepared to receive radial and axial forces. A bearing ring can be fixed on a shaft, wherein the ratio of the axial width of the ramp disc relative to the support height thereof is between 2.9 and 4.1 and the ratio between the ramp radius of the ramp of the ramp disc relative to the support height of the ramp disc is between 0.7 and 1.3. A method for producing a ramp disc for such a ramp actuator includes drawing, upset forging and embossing, preferably carried out in that order.

An assembly apparatus includes backup jigs, a press-fitting and caulking part, and an expansion part. The backup jigs is configured to back up arms of a yoke of the cross shaft universal joint from inside in an axial direction. The press-fitting and caulking part is configured to press-fit cup bearings from outside in the axial direction between bearing holes of the arms and a shaft portion of a cross shaft, and configured to caulk the cup bearings. The expansion part is configured to push a wedge body between the backup jigs and to expand the arms outward via the backup jigs. The press-fitting and caulking part is configured to press-fit the cup bearings and to caulk the cup bearings in a state in which the arms are expanded. The expansion part is configured to release an expansion of the arms after the press-fitting and caulking of the cup bearings.

A hydraulic actuating device for a coupling device having an actuating piston, a piston chamber assigned to the actuating piston and a supply chamber which is arranged further inwards in the radial direction than the piston chamber and via which a hydraulic fluid can be supplied to the piston chamber, wherein the supply chamber is delimited in a first axial direction by a first housing part and in a second axial direction opposite to the first axial direction by a second housing part, and the first housing part is fastened to a hub. The first housing part is fastened to the hub by clamping the second housing part in the axial direction between the first housing part and the hub. Furthermore, the present invention relates to a coupling device having such an actuating device as well as a method for manufacturing such an actuating device.

A clutch hub which is engaged with the clutch plates in an outer circumference is a press-molding article made from one steel sheet. In its inner circumferential surface, plural oil grooves for cooling the clutch plates, which are extended to a shaft direction and have a space in a circumferential direction. Each of dams as a press-molding portion extending to radial inward is formed at an end portion of each of the oil groove. The dams include an upright front surface and a back surface, and the bottom surfaces and both side surfaces of the oil grooves are integrated with the dams at the front surface side and the back surface side.

A ramp actuator has a pivotable ramp disc, which on a first end face has at least one ramp, which is prepared for the rolling of a rolling body and, spaced apart therefrom, has a raceway for bearing rolling bodies of a rolling bearing prepared to receive radial and axial forces. A bearing ring can be fixed on a shaft, wherein the ratio of the axial width of the ramp disc relative to the support height thereof is between 2.9 and 4.1 and the ratio between the ramp radius of the ramp of the ramp disc relative to the support height of the ramp disc is between 0.7 and 1.3. A method for producing a ramp disc for such a ramp actuator includes drawing, upset forging and embossing, preferably carried out in that order.