A brake disc for a disc brake includes a brake disc hub and at least one friction ring which is connected to the brake disc hub via rivets, a jacket of the brake disc hub being provided with sections with a reduced wall thickness and/or apertures which are axially directed material cut-outs situated on the outer circumference of the brake disc hub jacket and serve for at least partial positioning of the axially directed rivets. The friction ring and the brake disc hub are centered with respect to one another exclusively via the rivets, and each rivet, before the deformation thereof, is configured so as to taper conically at least over a part region of the rivet shank thereof in the region of the brake disc hub, starting from a swage head to a rivet closing head.

An internally ventilated brake disk for a disk brake, includes two friction disks, which are arranged adjacent to each other and which are connected to each other by radially extending, regularly arranged webs. The webs extend from an outer peripheral edge to an inner peripheral edge of the friction disks and the friction disks are connected by the webs in such a way that intermediate spaces thereof form cooling channels of equal size, through which cooling air can flow and which are divided by further, shorter webs in such a way that at least one shorter web is located centrally between the webs in a radial region closer to the inner peripheral edge of the friction disks. Outward from the shorter web in the radial direction, the cooling channels are divided into at least three flow channels in that, in each cooling channel, two first further shorter webs are arranged at an offset to each shorter web radially outwardly and in the peripheral direction. The friction disk directed toward a brake disk hub is extended radially inward from each of the shorter webs and is provided with a bore in the axial direction at the height of a collar of the brake disk hub, which bore is used to hold a rivet, which fastens the friction disk to the brake disk hub.

Provided is an electric parking brake device in which an actuator case of an electric actuator is mounted to a backplate of a drum brake which includes a parking brake lever, with which electric actuator it is possible to obtain a parking brake state by pulling a brake cable linked with the parking brake lever. The backplate is formed with a through-hole for passing the brake cable and has a connecting tube portion integrally protruding therefrom and enclosing the through-hole. A mounting tube includes, on one end in an axial direction, a joint portion which is formed separately from the backplate and joined to the connecting tube portion. The actuator case is mounted to the mounting tube at certain axial and circumferential positions with respect to the mounting tube. This allows increased freedom of the mounting attitude of the electric actuator with respect to the backplate without increased cost.

A brake disk for a disk brake, which consists of a brake disk chamber and at least one friction ring connected to the brake disk chamber by rivets, wherein a jacket of the brake disk chamber is provided with sections having reduced wall thickness and/or through-holes, which are axially directed material cut-outs located on the outer periphery of the brake disk chamber jacket, which material cut-outs are used to at least partially place the axially directed rivets. The friction ring and the brake disk chamber are centered with respect to each other exclusively by the rivets. The friction ring has at least one fastening extension directed inward from the friction surface, to which fastening extension a collar of the brake disk chamber jacket is connected by the rivets in that the side of the friction ring directed toward the brake disk chamber has an axially directed depression for accommodating the collar of the brake disk chamber, which depression is designed in such a way that there is radial play between the brake disk chamber and the friction ring.

A brake rotor, includes at least one friction element and one adapter element, wherein the brake rotor is configured to rotate about an axis of rotation, wherein the friction element has at least one friction surface and one connection region, wherein the adapter element has an installation region and a transfer region, wherein the installation region is configured for fixing the brake rotor to a hub, wherein the connection region indirectly or directly engages in positively locking fashion in a circumferential direction with the transfer region such that a torque about the axis of rotation can be transferred between the connection region and the transfer region from the friction element to the adapter element.

A brake disc includes a friction ring consisting at least partially of a first material and a brake rotor hat consisting at least partially of a second material that is different from the first material. The friction ring includes a flange formed in the axial direction, wherein the flange is connected to the brake rotor hat by means of at least one connection element. An intermediate piece is provided between the surface of the brake rotor hat in contact with the connection element and the connection element. In this way, a stable mechanical connection is created between the flange of the friction ring and the brake rotor hat.

A brake disc includes a friction ring having a first material and a brake rotor hat having a second material that is different from the first material. The friction ring includes a flange formed in the axial direction, and the flange is connected to an edge of the brake rotor hat oriented towards the friction ring, by means of at least one connection element designed as a rivet. The rivet head is in flat contact with the surface of the brake rotor hat facing away from the flange.

A bicycle brake disc having a braking track with brake pads and a plurality of first connection portions that extend towards the inside and that comprise respective first connection areas; a second component having (i) a radially inner annular coupling portion for coupling with a hub of a wheel of the bicycle and (ii) a plurality of second connection portions. The second connection portions extending outwards from the radially inner annular coupling portion towards the first component and comprising respective second connection areas; connecting members active between the first connection areas and the corresponding second connection areas. The second connection portions comprise at least one respective pair of arms that extend between the respective second connection area and the radially inner annular coupling portion, the pair of arms defining a through opening between them.

A rotor disk assembly includes a rotor disk. The rotor disk includes a first rotor lug, a second rotor lug circumferentially spaced from the first rotor lug and defining a slot therebetween. The slot is located on a radially outward portion of the rotor disk and the slot has an undercut engagement portion defined by the first rotor lug and the second rotor lug. The undercut engagement portion is positioned circumferentially on the rotor disk to engage a rotor clip.

A brake disc for a high performance vehicle comprises a rotor 20 formed of grey cast iron and comprising a friction ring 24 annular about an axis of rotation 26 and, coaxial with the friction ring 24, a tubular flange 28 extending axially from the friction ring 24 to a free end 28a and having a wall 28e with a radially inner face 28c and a radially outer face 28d. A hub 22 formed of aluminum is cast over the flange 28 to encapsulate at least a portion of the wall 28e, with which it has a shrink-fit connection. The encapsulated portion of the wall is made smooth (or otherwise formed with a varying radial dimension, or a screw thread) so as to permit differential thermal contraction, in an axial direction, of the hub 22 relative to the flange 28 as the hub 22 solidifies and cools after its casting. By this means, retained stresses in the hub 22 are minimized.