The present invention discloses a brake drum comprising: a brake drum body, which comprises a mounting portion for connecting a wheel, a braking portion for engagement with a brake shoe, and a transitional connecting portion disposed between the mounting portion and the braking portion; a hoop device is tightly mounted to the outer peripheral surface of the brake portion. The hoop device adopts a plurality of split-type hoop ferrules, or one unibody hollowed-out hoop case. The hoop device tightly mounted to the outer peripheral surface of the brake portion can not only effectively restrain the radial expansion deformation, thereby improving the fatigue resistance of the brake drum body, but also applies a clasp force to the brake drum body, thereby avoiding the danger of burst and flying out of the brake drum body, which greatly improves service life and safety. Moreover, the thickness of the brake portion wall corresponding to the hoop device can be effectively reduced, which not only effectively decreases the temperature difference between the interior and exterior of the brake drum body, but also increases heat conductivity, thereby laying foundation for both heat dissipation and prevention of the happening of the multiple cracks in the inner wall of the brake drum body.

A bicycle disc brake rotor including a center rotational axis is provided with an outer member including a braking portion extending in a rotation direction of the bicycle disc brake rotor and an inner member located at an inner side of the outer member in a radial direction of the bicycle disc brake rotor and coupled to the outer member. At least one of the outer member and the inner member includes a displacement reducing structure configured to reduce displacement of the braking portion in an axial direction of the bicycle disc brake rotor.

A braking band (14) of a disc for a disc brake (100) suitable to rotate about a rotation axis (A-A), said braking band comprising opposite annular braking surfaces (16, 18) which extend from an inner edge (20) facing towards the rotation axis (A-A) to an outer edge (22) facing towards the outside of the disc, said braking band (14) having a distribution of grooves (44, 48, 52, 101, 103, 105, 107, 109, 111, 113) on at least one of the braking surfaces (16, 18), said distribution, or distribution assembly of grooves, having a pattern or module (42, 43) which is repeated circumferentially, each of said grooves (44, 48, 52, 101, 103, 105, 107, 109, 111, 113) being a closed groove which extends in a main direction of extension (46, 50, 54, 102, 104, 106, 108, 110, 112, 114) which defines a direction (46a, 50a, 54a, 102a, 104a, 106a, 108a, 110a, 112a, 114a) of said groove, each groove further extending without intersecting other grooves, said module (42, 43) extends from an inner radius (r1) to an outer radius (r2), said radii defining an annular portion of said braking surface having said grooves, said module (42, 43) comprising a first groove (44 and/or 105), which extends without interruption substantially from said inner radius (r1) to said outer radius (r2), as well as at least a second (48 and/or 107) and a third groove (52 and/or 109) with lesser extensions than said first groove (44), said first, second and third grooves (44, 48, 52 and/or 105, 107, 109) of the same module (42 or 43) have extensions parallel to one another, wherein said second groove (48 and/or 107) has a greater extension than said third groove (52 and/or 109), and wherein said at least first, second and third grooves (44, 48, 52 and/or 105, 107, 109) are positioned alongside one another and said second groove (48 and/or 107) is positioned between said first groove (44 and/or 105) and said third groove (52 and/or 109), and wherein the extension of said first groove is suitable to affect the entire area touched by at least one brake pad (124) suitable to act in conjunction with said annular braking surface (16 and/or 18) to exert a braking action, and wherein at any point in the direction of extension of each groove, said direction of extension (46

A brake pad includes a main plate and a brake lining secured on one face of the main plate. A heat dissipation structure is formed on one side of the main plate opposite to the brake lining. The heat dissipation structure guides a backward airflow toward the main plate for promoting the heat dissipation effect of the lining during braking process or finishing braking process.

Brake calipers and rotors for bicycles are described herein. An example brake caliper includes an outboard caliper portion to be disposed inboard of a frame of the bicycle. The outboard caliper portion includes an outboard caliper body and an outboard brake pad that is fixed relative to the outboard caliper body. The brake caliper also includes an inboard caliper portion coupled to the outboard caliper body. The inboard caliper portion is disposed inboard of the outboard caliper portion when the brake caliper is coupled to the bicycle. The inboard caliper portion includes an inboard caliper body and an inboard brake pad that is movable relative to the inboard caliper body.

Brake rotors for bicycles are described herein. An example brake rotor for a bicycle includes a carrier to be coupled to a hub of the bicycle. The brake rotor also includes a brake track having braking surfaces to be engaged by brake pads. The brake track is disposed radially outward of the carrier. The brake track has a first thickness and the carrier has a second thickness greater than the first thickness. The brake track is coupled to the carrier such that the brake track is axially movable relative to the carrier while being radially and circumferentially constrained relative to the carrier.

A brake disk or drum has at least one working surface which opposes a braking member such as a brake pad or shoe. A plurality of spaced, raised island formations are provided across the working surface, with channels extending between the island formations. Each raised island formation has an outer surface which contacts a brake pad or brake shoe during braking.

A brake disk with a surface which is structured in order to increase the adhesion of a coating on the surface, wherein the structuring of the surface comprises at least one recess, the depth of which decreases as the depth of the recess increases wherein the at least one recess has the shape of a spiral structure.

A brake disc includes an outer circumferential portion including a waveform portion having recessed portions and projecting portions repeatedly formed over an outer circumference, and for the outer circumferential portion to have substantially uniform heat capacity distribution in a circumferential direction and in a radial direction, the outer circumferential portion is formed such that a ratio of a difference in heat capacities among a plurality of circumferential sections in the outer circumferential portion, which are sectioned at an equal angle in the circumferential direction, relative to a heat capacity of each circumferential section is equal to or less than a first predetermined ratio. A ratio of a difference in heat capacities among radial sections in the outer circumferential portion, which are sectioned to have an equal length in the radial direction, relative to a heat capacity of each radial section is equal to or less than a second predetermined ratio.

An electric wheel drive unit (1) for driving a wheel of a motor vehicle is provided having a brake device (2) for braking the electric wheel drive unit (1) during operation, and a housing (3) which accommodates the brake device (2) in its interior (I). The brake device (2) is designed to convert kinetic energy into heat in order to perform braking, and to suck in a fluid in the axial direction (A) and to feed it in the radial direction (R) in order to cool the brake device (2) by a flow of fluid which is for the most part oriented radially and flows through the brake device (2).