A pack includes a set of first friction disks interleaved with a set of second friction disks to form a stack. An annular pressure plate has an engagement side disposed against the stack. The engagement side includes an outer circumferential edge, an inner circumferential edge, a flat face extending radially inward from the outer edge, a step axially recessed into the engagement side relative to the face, and a tapered face extending from the step to the inner circumferential edge. The tapered face is disposed against an end one of the first friction disks, and the flat face is radially outboard of the first friction disks.

A method and tool system coaxially orients inner clutch plates with outer clutch plates on a tool. The tool includes a plurality of guide members circumferentially spaced apart, each guide member matingly engages a toothed portion of each inner clutch plate to position the inner clutch plates coaxially. A pre-build fixture includes a plurality of alignment pillars, at least one support block, and an alignment member. The alignment pillars are circumferentially spaced apart about a fixture axis. Each alignment pillar has a curved inner face that faces radially inward and has an arclength that is configured to coincide with and fit within a corresponding gap between radially outward facing teeth of each outer clutch plate. The support block supports the tool coaxially with the fixture. The alignment member engages the tool to inhibit rotation of the tool when the tool is supported coaxially with the fixture by the support block.

Disclosed is a method for optimizing feature parameters of straight grooves of a wet friction element and relates to the technical field of heavy-duty vehicle transmission. By using the method, the feature parameters of the straight grooves of the wet friction element can be improved by optimization, and the thermoelastic stability of the wet friction element can be improved.

A friction device has a carrier element and friction lining segments arranged thereon. The friction lining segments each include a sintered friction lining, which is arranged on a friction lining carrier, the friction lining carrier is connected to the carrier element, and preferably the carrier element includes multiple fastening lugs and/or lining spring elements for the friction lining segments. In the design of the carrier element with the fastening lugs and/or lining spring elements, the friction lining segments each connect two fastening lugs or two lining spring elements to one another and/or the friction lining segments have an angle coverage between 25° and 55°.

The wet friction member 1 of the invention includes a core plate 2 formed in a flat ring shape, a friction part 3 arranged in a ring shape. The friction part 3 has segment pieces including rectangular shaped G.sub.1 to G.sub.4: G.sub.1 in which a lower right corner of rectangular piece is notched; G.sub.2 in which an upper left corner of rectangular piece is notched; G.sub.3 in which an upper right corner of rectangular piece is notched; G.sub.4 in which a lower left corner of rectangular piece is notched. The friction part 3 has arrangements T.sub.1 and T.sub.2: T.sub.1 in which G.sub.1 and G.sub.2 are arranged in a manner a right side of G.sub.1 and a left side of G.sub.2 face each other; T.sub.2 in which G.sub.3 and G.sub.4 are arranged in a manner a right side of the G.sub.3 and a left side of G.sub.4 face each other.

An end disk of a multi-disk clutch is described, which has a ring plate, the ring plate having a central opening and at least one axial impression on a front side via which a corresponding projection is formed on the opposite front side.

Provided are a wet friction plate and a wet multiplate clutch device capable of reduction drag torque while suppressing a decrease in the area of a friction member. A wet multiplate clutch device 100 includes wet friction plates 110 at positions facing clutch plates 103 rotatably driven by rotary drive force of an engine. The wet friction plate 110 includes multiple friction members 112 through oil grooves 115 on a flat plate annular core metal 111. The friction member 112 has first fine grooves 113 opening at an inner peripheral edge 112a of the friction member 112 and extending to an outer peripheral edge side 112b and second fine grooves 114 opening at an outer peripheral edge 112b of the friction member 112 and extending to an inner peripheral edge side 112a. The first fine groove 113 and the second fine groove 114 are formed to have a groove width of equal to or greater than 0.1 mm and equal to or less than 0.8 mm, and overlap portions 113c, 114c overlapping with each other in a circumferential direction at the same position in a radial direction of the core metal.

An arrangement with at least one component (1) for a transmission of a vehicle is provided. The component (1) has an annular cylindrical interior (3) and is rotationally fixedly and axially movably connected to an input shaft (2). The component (1) has at least one passage bore (4) for hydraulic pressure balancing. The annular cylindrical interior (3) of the component (1) has at least one interior contour (5A, 5B) assigned to the passage bore (4) as an area reducing a stress concentration.

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).

A multiple disc clutch includes an axially displaceable outer disc hooked into an outer disc carrier to provide a first friction surface, and an axially displaceable inner disc hooked into an inner disc carrier to provide a second friction surface for a friction pairing with the first friction surface. The outer disc has an outer coupling element for coupling to the outer disc carrier and the inner disc has an inner coupling element for coupling to the inner disc carrier. The outer disc has an outer ring, the outer coupling element extends radially from the outer ring, and the first friction surface is connected to the outer ring by an outer leaf spring element; or the inner disc has an inner ring, the inner coupling element extends radially from the inner ring, and the second friction surface is connected to the inner ring by an inner leaf spring element.