A bicycle disc brake rotor that further increases heat dissipation has a rotation axis. The bicycle disc brake rotor includes at east one outer circumferential portion, which includes at least one brake surface, and first and second inner circumferential parts, which are coupled to the outer circumferential portion. Each of the first and second inner circumferential parts is at least partially located radially inward from the outer circumferential portion with respect to the rotation axis. The first and second inner circumferential parts are arranged to form a gap in between in an axial direction that extends parallel to the rotation axis. At least one of the first and second inner circumferential parts includes at least one cooling enhancement section. The cooling enhancement section includes at least one opening that is in communication with the gap.

A bicycle disc brake caliper assembly is basically provided with a main caliper body, at least one brake pad and a mounting adapter. The main caliper body includes a first coupling portion that is configured not to be directly attached to a bicycle frame. The at least one brake pad is movably attached to the main caliper body. The mounting adapter includes a second coupling portion that is configured to be detachably coupled to the first coupling portion, and a mounting portion that is configured to be mounted to a bicycle frame.

A heat dissipation structure for a brake pad is provided for being assembled to a caliper device. The caliper device includes a caliper body, and the caliper body has a receiving space. The heat dissipation structure includes: a main body, integrally extruded from aluminum and cut to have an ultimate appearance, including a plate body and a heat dissipation portion integrally extending from the plate body, the plate body for being disposed on the caliper body and at least partially extending into the receiving space, when the main body is assembled to the caliper body, the heat dissipation portion is exposed outside the caliper body. A brake pad assembly is further provided, including a heat dissipation structure as described above, further including a brake pad, the brake pad disposed on a lateral face of the plate body.

A rail wheel having a wheel-mounted brake disk fastened to the wheel body of the rail wheel by multiple fastening elements distributed across the wheel circumference and seated against the wheel body within this fastening region, where the wheel-mounted brake disk is seated against the wheel body in at least one radial area radially outside the fastening region in the cold state and is spaced apart from the wheel body in the region radially within the fastening region to reduce stress on the fastening elements after braking has been initiated.

According to an aspect, this invention relates to a cooling device for a disc brake, the device extending in a longitudinal direction and comprising a first portion configured to surround the discs of the brake, intended for being arranged facing the side surfaces of the brake discs and configured to capture, by irradiation and/or convection, the heat generated by the discs during the friction. The cooling device further includes a second portion, secured and thermally coupled to the first portion, offset in the longitudinal direction relative to the first portion, and provided with tins extending radially relative to the longitudinal direction and configured to dissipate the heat captured by the first portion, by convection and/or irradiation, into the ambient air.

A friction surface includes at least one groove for dissipating a tempering medium, in that the groove has a stepped profile to constitute a fluidic resistance for the tempering medium. The tempering medium may be a cooling medium such as cooling oil. The stepped profile is, for example, achieved by stair-like delimitation lines of the groove. The stepped profile slows down a fluid flow of the tempering medium, in particular a cooling fluid, in particular through a plate pack of a multiplate clutch. In other words, the tempering medium or cooling fluid or cooling oil is braked. The slowed tempering medium can absorb heat over a longer period, in order to dissipate this heat from the friction surface or from the friction surface and a counter-surface in a plate pack. In this way, the cooling capacity can be improved.

A disc brake caliper is basically provided with a caliper housing, a brake pad and an intermediate member. The caliper housing defines a slot that is configured to receive a brake rotor. The caliper housing is made of a first material. The brake pad includes a mounting plate. The brake pad is disposed in the slot. The intermediate member is disposed between the caliper housing and the brake pad. The intermediate member is made of a second material having a thermal conductivity that is smaller than a thermal conductivity of the first material.

The present invention relates to a disc brake caliper body comprising a mounting side bracket and a non-mounting side bracket extending along a circumferential direction of the body, each bracket being configured to hold at least one brake pad. In order to provide improved cooling efficiency while maintaining the required stability of the brake caliper, the caliper body further comprises at least one cooling duct formed by additive manufacturing, at least one cooling duct being an integral part of the caliper body.

A disc brake caliper is basically provided with a caliper housing, a brake pad and an intermediate member. The caliper housing defines a slot that is configured to receive a brake rotor. The brake pad is disposed in the slot. The intermediate member is disposed between the caliper housing and the brake pad.

A wet brake includes a housing, a rotator, a plurality of plates, a plurality of discs, and a piston. The rotator is rotatably disposed in the housing and cooperates with the housing to form therebetween a brake chamber into which cooling oil is forced to flow. The plates are disposed in the brake chamber and axially movably engaged with the housing. The discs are disposed alternatively with the plates in the brake chamber and axially movably engaged with the rotator. The piston is configured to push the plates and the discs. The housing has a cooling oil inlet and a cooling oil outlet that communicate with an inner peripheral region and an outer peripheral region of the brake chamber, respectively. An oil collecting passage is formed adjacent to an open end of the cooling oil outlet on a brake chamber side to communicate with the brake chamber and continues circumferentially.