The present disclosure relates to a wheel hub unit of a motor vehicle and to a method for producing such a wheel hub unit. The wheel hub unit includes a wheel hub and a contact flange firmly connected to the wheel hub. The contact flange includes a plurality of fastening elements for fastening a wheel rim, as well as a contact surface which is intended to come into mechanical contact, at least in part, with a brake hat of a brake disk when the brake disk is in the mounted state. At least part of the contact surface is provided with a thermally insulating coating. Alternatively, the entire contact surface is provided with the thermally insulating coating.

Aspects of the present disclosure are directed to, for example, drive systems for transport devices. In one example embodiment, a drive system is disclosed including at least two drive wheels, at least one wheel bearing, at least one rim of the at least one of the drive wheels mounted by means of the at least one wheel bearing, at least one drive of the at least one of the drive wheels is arranged within the at least one wheel bearing, and at least one braking device coupled to at least one of the drive wheels. The at least two drive wheels are aligned on a common first axis, the drive wheel axis of rotation, which is angled relative to a second axis, the pendulum axis, and a third axis, a pivot axis, is likewise arranged at an angle relative to the first and second axes.

The invention is a bicycle drive assembly and it generally includes a drive chain, a drive wheel including a hub, a frame including left and right chainstays, each having a raced bearing, a cassette assembly, and an axle assembly. The cassette assembly includes a body having an inner end rotatably mounted on the right chainstay bearing, an outer free end, and a cassette including a plurality of sprockets. Cooperative torque-transferring components transfer torque between cassette and body, body and axle, and axle and hub. A freewheel mechanism, as one of the cooperative torque-transferring components, allows the bicycle to coast. A drive axle is selectably movable axially between a riding position, wherein it is rotatably mounted on the chainstay bearings and supports and drives the wheel, and a release position wherein the wheel is removable.

A brake rotor includes a friction portion, a hat portion axially extending from the friction portion and including a top face that is axially displaced from the friction portion and a side wall that extends from the friction portion to the top face, and a nose portion which extends axially from the top face of the hat portion away from the friction portion.

Radially outer ring of a bearing unit for a hub-wheel assembly for motor vehicles, the radially outer ring being provided with: a flange portion having a plurality of axial fixing holes that connect an element of the motor vehicle wheel to the radially outer ring, an almost cylindrical portion which with part of its radially internal surfaces defines raceways for rows of rolling bodies of the bearing unit, an axially internal or axially external surface of the flange portion and a radially external surface of the cylindrical portion connected to each other by a first portion of toroidal surface (St1) and of a second portion of toroidal surface (St2) defined by corresponding first radius (R1) and second radius (R2), a truncated cone surface (Stc) defined by an angle (a) formed with a rotation axis (X) of the radially outer ring is interposed between the first portion of toroidal surface (St1) and the second portion of toroidal surface (St2).

A modular chassis is provided for an off-road vehicle to improve assembly, servicing, and repairing of a drivetrain of the off-road vehicle. The modular chassis includes a chassis to support components of the off-road vehicle. A front frame module couples with a front of the chassis, and a rear frame module couples with a rear of the chassis. The front frame module supports lower suspension arms of the off-road vehicle by way of inboard bushing joints. The front frame module supports at least a steering gear and a front differential of the off-road vehicle. The rear frame module is a tube-frame structure that supports components of the off-road vehicle. A lower portion of the rear frame module extends rearward and acutely upward to a top frame member that couples with upper side portions of the chassis. Several cross-members impart structural integrity to the rear frame module.

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 two-speed transmission system integrated with an inner rotor hub motor, including an inner rotor hub motor, a steering knuckle, a fastening screw, a first transmission casing, a second transmission casing, a screw, a first planetary gear train, a second planetary gear train, a first electromagnetic brake, a second electromagnetic brake, a tire, a wheel rim, a rim bolt, a rim nut, a wheel hub, a shaft end bolt, a brake disc and a brake caliper. This invention also provides an electric vehicle, which balances the requirements for dynamics performance and driving economics and achieves better overall performances. The two-speed transmission system of this invention realizes gear shifting and long-term no-power parking braking.

A training wheel assembly includes an assembly frame and a training wheel rotatably attached to the assembly frame. The training wheel has a wheel axle extending therefrom and defining an axis about which the training wheel rotates, and an annular hub concentric with the wheel axle and rotationally fixed therewith. A plurality of successive ratcheted teeth facing the assembly frame form a circumferential inner edge of the wheel. An elastically deflectable tongue is attached to the assembly frame and is selectively extendible into a rotational path of motion of the ratcheted teeth, whereby upon rotation of the training wheel with respect to the assembly frame about the axis, contact of the elastically deflectable tongue with successive teeth of the plurality of ratcheted teeth generates an audible sound indicating that the training wheel is rotating.

A brake assembly includes a wheel hub having a radially-outer diameter and a plurality of splines that are spaced apart around the radially-outer diameter. A brake disc is mounted on the wheel hub and has a radially-inner diameter and a plurality of pockets that are spaced apart around the radially-inner diameter. The pockets receive the splines such that the brake disc rotates with the wheel hub. Each pocket has opposing axially-extending side walls. Each side wall has an outwardly-chamfered outboard end and an inboard locking recess. A plurality of spacers are radially disposed between the splines and pockets. Each spacer has opposing arms connected together by a brace. Each arm has an outwardly-chamfered end and outwardly-projecting locking foot which together mate with the outwardly chamfered outboard end and inboard locking recess, respectively, so as to lock the spacer in the pocket.