A housing is placed at an inside space of a case to be installed on a vehicle. The housing includes: a housing plate portion configured to contact a case plate portion of the case; and a receiving space located on one side of the housing plate portion which is opposite to the case plate portion. An electric motor is placed at the receiving space and is configured to output a torque. The housing includes a housing protrusion and a housing recess. The housing protrusion protrudes from a surface of the housing plate portion located on another side of the housing plate portion at which the case plate portion is placed, and the housing protrusion is configured to fit into a case recess of the case. The housing recess is recessed from another surface of the housing plate portion which is opposite to the housing protrusion.

Sealing device for a wheel hub assembly provided with a rolling bearing, the sealing device being provided with a shield mounted on an outer ring of the bearing and with an annular cylindrical wall having an inner lateral surface mounted on an outer lateral surface of a collar of the outer ring; and with a sealing material fixed to the shield and defined by a pre-formed annular covering of polymer material, preferably but not necessarily rubber or thermoplastic material, formed independently and separately from the shield and mounted on the shield.

A coupling is disclosed for connecting rotating components of a generator and a prime mover in a power generation system. The coupling comprises a hub, a coupling flange and an elastomeric component located between the hub and the coupling flange. The elastomeric component is removable radially from the coupling.

An adaptor is disclosed for connecting a generator to a prime mover. The adaptor comprises two separable parts. By providing an adaptor comprising two separable parts, it may be possible for one part to be removed in order to allow access to moving parts which would otherwise be inaccessible. This may simplify the process of servicing moving parts such as a coupling or bearings, without requiring the generator and the prime mover to be moved apart. A coupling with a radially removable elastomeric component is also disclosed.

A guard device has an enclosure for enclosing a first machine, a coupling guard for covering a coupling device that is prepared for connecting the first machine to a second machine, the enclosure being connected to the coupling guard. The guard device has an elastic component that elastically connects the enclosure to the coupling guard.

The present invention discloses a bicycle shaft transmission assembly including a bottom bracket engaged with a crank in a front part and a wheel hub in a rear part, a front main gear mounted on the bottom bracket, a rear main gear mounted on the wheel hub, a transmission shaft eccentrically arranged between the front main gear and the rear main gear. The front main gear is matched with a front end gear, and the rear main gear is matched with a rear end gear. The front main gear is externally provided with a front housing, the transmission shaft is externally provided with a transmission shaft housing, the rear main gear is externally provided with a rear housing, a front end of the transmission shaft housing is engaged with the front housing, a rear end of the transmission shaft housing is engaged with the rear housing.

A constant-velocity joint includes an outer race, inner race, end cap, and seal. The outer race defines a cavity, an opening to the cavity, and a through hole configured to receive a fastener. The inner race is disposed within the cavity and is rotatably connected to the outer race via a plurality of ball bearings. The end cap is secured to the outer race and covers the opening. The seal is disposed between the outer race and the end cap. The seal defines a channel that is in fluid communication with the cavity and the through hole. The channel is configured to vent air between the cavity and through hole.

The present invention discloses a bicycle shaft transmission assembly including a bottom bracket engaged with a crank in a front part and a wheel hub in a rear part, a front main gear mounted on the bottom bracket, a rear main gear mounted on the wheel hub, a transmission shaft eccentrically arranged between the front main gear and the rear main gear. The front main gear is matched with a front end gear, and the rear main gear is matched with a rear end gear. The front main gear is externally provided with a front housing, the transmission shaft is externally provided with a transmission shaft housing, the rear main gear is externally provided with a rear housing, a front end of the transmission shaft housing is engaged with the front housing, a rear end of the transmission shaft housing is engaged with the rear housing.

An air venting system for a constant velocity joint (20) having an inner race (24), an outer race (22), a cage (26), a plurality of torque transferring elements (28), a drive sleeve, a drive nut and a boot assembly. The outer race has a wall portion (90) having a vent hole (88, 242) with a first and a second axially extending channel (224, 264). A radially extending wall integrally connects the second axially extending channel to the first axially extending channel. A valve (256) having a stopper portion (264), a disk portion (258) and a breather portion (260) is at least partially located within the vent hole. The breather portion (260) further includes an axially extending ring (292) that terminates in a radially extending wall. At least a portion (300) of an edge portion of the radially extending wall of the breather portion of the valve is in direct contact with at least a portion (250) of an outer surface of the wall portion of the outer race.

A cover for use on a drive is adapted to be received by a feature on the drive. The cover includes a body and a mount. The mount is operably associated with the body. The mount is also adapted to cooperate with the feature on the drive to removably secure the cover to the drive. The mount and the body are separate components.