In order to achieve lightness and improve hardness of a brake disk, and minimize weight and improve productivity through an improvement of a coupling structure of a disk plate and a hub, provided is a method of manufacturing a brake disk including a disk plate, which provides a friction surface and is formed with a hole at a center, and a hub, which is coupled to the hole formed at the center of the disk plate, the method including: preparing a disk plate; preparing a hub in the form of a flat plate; positioning the hub in the form of the flat plate on one surface of the disk plate; and bonding the disk plate and the hub by an interference fit.

A solid type brake disc includes a hat part that includes a circular body that is fitted on a rotary shaft of a wheel and a plurality of hollow protrusions that are formed around the outer surface of the body and each have an internal space. The solid type brake disc also includes a friction part that includes a ring body that has a center hole and receives the hat part in the center hole and projections that protrude toward the hollow protrusions and are inserted in the internal spaces to be covered with the hollow protrusions.

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 multiple disc brake system comprises an annular disc stack that includes interleaved sets of rotor discs and stator discs; an axially extending torque tube; and an actuator that axially moves the rotor discs into engagement with an axially adjacent stator disc. Each of the stator discs includes a plurality of circumferential arranged stator lugs that secure the stator discs to the torque tube, where each of the plurality of circumferential stator lugs comprises tapered side walls that taper inwardly transverse to the axially extending torque tube.

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.

An assembly for an induction sensing tone ring is provided. A brake rotor includes a circular pocket. A tone ring is received in the circular pocket of the brake rotor. The brake rotor has a plurality of locating tabs, with each locating tab having a slope surface. The tone ring has a plurality of retaining tabs, with each retaining tab being received between two locating tabs of the brake rotor. A retaining ring is fitted in each locating tab slope surface of the brake rotor to press fit against the retaining tabs of the tone ring.

A floating disc brake assembly, and method of assembly, comprising a disc brake rotor comprising an outer friction ring, an inner circumferential flange having a plurality of rotor tabs spaced about the flange and a circumferential groove about the inner circumferential flange, a hat comprising a cylindrical axial body, an outer circumference, a rotor mounting flange extending radially about the outer circumference and having a plurality of rotor mounting tabs spaced about the rotor mounting flange and forming slots interspersed therebetween structured and arranged for receiving the rotor tabs, and a circumferential groove about the outer circumference of the axial body, structured and arranged to align with the circumferential groove of the disc brake rotor, and at least one expander ring structured and arranged to fit within the circumferential grooves of both the rotor and the hat.

A brake disc assembly includes a disc main body having first through holes, a connecting seat having second through holes, and fastening devices each including a bolt, a nut, a spacer clamped between the disc main body and connecting seat and including a third through hole, and a sleeve including a fourth through hole. An insertion portion of the sleeve is disposed in the first, second and third through holes. The bolt includes a rod portion inserted through the fourth through hole and having a threaded section onto which the nut is screwed so that the disc main body, spacer, connecting seat and an abutment portion of the sleeve are clamped between a head portion of the bolt and the nut. The brake disc assembly has concise structure and low manufacturing cost, and provides slight floating effect of the disc main body while preventing foreign objects from entering therein.

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.

An assembly to secure a disc brake rotor to a wheel hub utilizing spring pins and a retaining ring is provided. A partial keyway is formed in the rotor, and a partial keyway is formed in the wheel hub. The rotor is fitted over an inwardly extending section of the hub, with the partial keyways in the rotor and in the wheel hub being aligned to form complete keyways. The spring pins are then press fit into the completed keyways. Finally, a retaining ring is installed into a slot formed in the inwardly extending section of the wheel hub to complete the assembly of the disc brake rotor assembly.