A generator comprising a generator housing and a generator drive shaft including a power input shaft coupled to a drive member through a coupling arrangement, whereby in use the drive member is coupled to an output shaft of an associated engine. The coupling arrangement is arranged within the generator housing and comprises first and second coupling members and an insulator member interposed between the first and second coupling members. The coupling arrangement is configured such that the input shaft is electrically insulated from the drive member and, hence, from the engine output shaft, in use.
A generator housing (1) of an engine generator is connected to a gearbox casing (17) via a cover plate (23) that bears the rotor shaft (5). The cover plate has a two-piece design and includes a bearing retainer ring (13) for a rotor shaft bearing (11) made of a rigid material and fastened only to the gearbox casing, and a heat-conducting ring (21) connected with both the gearbox casing and the generator housing. A centering cylinder (18) molded to the bearing retainer ring centers the generator housing and thus the stator (3) and rotor (4) while a spacer ring (20) and/or an adjustable spacer ring (10) ensure the exact axial positioning of the rotor or bearing retainer ring. The generator of this design is safe to operate and has a long service life.
