A brake disc having a friction ring and a hub produced as a separate element and arranged inside the friction ring according. Recesses are configured in the friction ring on the inside to connect the hub to the friction ring and corresponding projections are formed on the hub, which projections engage in the recesses of the friction ring in order to be able to transfer torque from the friction ring to the hub. The recesses have an undercut at least partially in a radial direction, as viewed looking inward from the outside. The disc is simple and cost-effective to manufacture and has an acoustically advantageous operating performance, in particular in the case of thermal expansion.

A pot-shaped composite brake rotor for motor vehicles, which combines at least one securing component as a hub interface with at least one friction ring component (as a friction partner for at least one friction lining. Distinction is made between a torque transmission function a fixing function between the paired components by the provision of a heat-conductive joint interface between the components on one side. The components are assembled coaxially with one another and joined rotationally fixedly in the axial direction so that the securing component serves as a heat sink for the friction ring component. At least one fixing element between the components is provided separately, and this fixing element substantially exclusively (nominal load) performs a fixing function by mutual form fit by a radially directed engagement behind at least one undercut. A press-fit connection s present for torque transmission between the securing component and the friction ring component.

A disk brake for a motor vehicle includes an internally ventilated brake disk, a brake disk nave, and radially directed bores. In the radially directed first bores the connecting means are introduced such that they extend further into radially directed second bores in the friction ring into the friction ring. The brake disk nave forms the fit with a single friction ring half and this fit has material convexities, which point inward toward the cooling channels or the ribs, at the points at which the second bores are introduced for the connecting means.

A tone ring attachment for a disc brake rotor. The disc brake rotor has a disc portion that includes a plurality of circumferentially-spaced lugs. Each one of the lugs has a groove. A discrete tone ring body has a plurality of bosses. Each one of the bosses is receivable in a respective one of the grooves in the lugs. A dart projection extends from at least one of the bosses. The dart projection engages a respective one of the lugs to inhibit relative axial movement and relative rotational movement in at least one direction between the tone ring and the disc brake rotor. A tab is formed on at least one of the bosses. The tab is engageable with a portion of the lug to inhibit relative rotational movement in a second direction opposite the first direction between the tone ring and disc brake rotor.

A brake rotor for a bicycle has a brake body formed of a first material and a cooling element with a cooling body, at least part of which is formed of a second material that has a higher thermal conductivity than the first material. The brake body has a generally annular shape with a first axial contact surface. The cooling body is coupled to the first axial contact surface. The cooling body may be in contact with the first axial contact surface around the brake body for a majority of a circumference of the heat dissipation region. The cooling body may be attached to or be an integral part of a carrier coupled to the brake body. The cooling body may include a protrusion.

The present disclosure relates to a brake disc including a braking part having a circular plate shape having a hollow portion and a plurality of coupling portions protruding and extending from an inner diameter surface thereof, and a hat part disposed in the hollow portion and having a plurality of insertion portions protruding laterally, in which the plurality of coupling portions is respectively coupled to the plurality of insertion portions, and the coupling portion of the braking part and the insertion portion of the hat part are joined to only one of an outboard portion or an inboard portion of the braking part. According to the present disclosure, it is possible to reduce noise occurring at a position at which the hat part and the braking part are coupled to each other and improve cooling performance.

A lug drive system for a wheel such as that found on a motorcycle. The lug drive system includes a 2-piece lug drive hub assembly mourned on one side of the wheel to apply a driving force thereto. The lug drive hub assembly includes a lug drive sprocket and a hub that are detachably connected together by an inner retaining ring. The lug drive sprocket includes an outer drive ring and an inner carrier disk that are detachably connected together by an outer retaining ring. The lug drive system also includes a 2-piece lug drive rotor assembly mounted on the opposite side of the wheel to apply a braking force thereto. The lug drive rotor assembly includes a lug brake rotor and a hub that are detachably connected together by an inner retaining ring. The lug brake rotor includes an outer friction ring and an inner carrier disk that are detachably connected together by an outer retaining ring.

A brake assembly including a rotor defining an aperture. An axis of rotation of the brake assembly extends through a center of the aperture. A spindle is within the aperture. The spindle is in cooperation with the rotor to restrict independent rotation of the rotor and the spindle about the axis of rotation, restrict axial movement of the rotor relative to the spindle along the axis of rotation, and accommodate radial expansion of the rotor in a plane perpendicular to the axis of rotation.

A hub configured to rotate about an axis of rotation in the circumferential direction, and having a connection surface and a connection opening, the connection opening configured to at least partially receive a connector, the connection surface configured to contact indirectly and/or directly with a contact surface of a brake disc, where the contact surface does not include connection openings.

Disclosed is a brake disc for vehicles including a ring-shaped disc part provided with an insertion space formed at the central region thereof, a hub part disposed within the insertion space and provided with recesses formed on the external circumferential surface thereof, and connection parts configured to connect the disc part and the hub part, wherein each of the connection parts is divided into a curved section extending from the internal circumferential surface of the disc part and having both curved side surfaces and a rectilinear section extending from the curved section, having both flat side surfaces and inserted into each of the recess, and widths of the curved section and the rectilinear section are decreased in a direction toward the hub part.