A machine housing including a first housing part, a second housing part, and two straight centering elements. Each centering element engages both in one of the first centering element receptacles and in one of the second centering element receptacles, such that the centering element receptacles connected via the centering element are aligned axially with one another, such that the housing parts are aligned with one another such that the shaft bearing seats are centered axially along a common shaft bearing axis. A respective longitudinal center axis of the centering elements extends obliquely or perpendicularly to the shaft bearing axis.

A machine housing including a first housing part, a second housing part, and two straight centering elements. Each centering element engages both in one of the first centering element receptacles and in one of the second centering element receptacles, such that the centering element receptacles connected via the centering element are aligned axially with one another, such that the housing parts are aligned with one another such that the shaft bearing seats are centered axially along a common shaft bearing axis. A respective longitudinal center axis of the centering elements extends obliquely or perpendicularly to the shaft bearing axis.

In a rotating body and a rotating electric machine, a rotary shaft made of a magnetic body, a rotor fixed to the rotary shaft, and a pair of bearing sleeves for an air bearing that have a cylindrical shape, are mounted on one end portion and the other end portion of the rotor in an axial direction, and have wear-resistant coating layers on outer peripheral surfaces are provided, and the pair of bearing sleeves for an air bearing are provided with the wear-resistant coating layers before assembly to the rotary shaft.

In a rotating body and a rotating electric machine, a rotary shaft made of a magnetic body, a rotor fixed to the rotary shaft, and a pair of bearing sleeves for an air bearing that have a cylindrical shape, are mounted on one end portion and the other end portion of the rotor in an axial direction, and have wear-resistant coating layers on outer peripheral surfaces are provided, and the pair of bearing sleeves for an air bearing are provided with the wear-resistant coating layers before assembly to the rotary shaft.

An electric motor assembling device includes a lifting mechanism, a pressure mechanism, a press head mechanism, an assembling station and a control mechanism. The pressure mechanism is located at one side of the assembling station, and the lifting mechanism and the press head mechanism are located at the other side of the assembling station. The pressure mechanism includes a pressure mechanism body and a pushing portion connected with the pressure mechanism body, and the pushing portion is configured to be pushed into the assembling station relative to the pressure mechanism body. The press head mechanism includes an abutting portion at a side facing the assembling station. The lifting mechanism includes a clamping portion at a side facing the assembling station, and the clamping portion is configured to move in a direction running away from the assembling station relative to the press head mechanism.

An electric motor assembling device includes a lifting mechanism, a pressure mechanism, a press head mechanism, an assembling station and a control mechanism. The pressure mechanism is located at one side of the assembling station, and the lifting mechanism and the press head mechanism are located at the other side of the assembling station. The pressure mechanism includes a pressure mechanism body and a pushing portion connected with the pressure mechanism body, and the pushing portion is configured to be pushed into the assembling station relative to the pressure mechanism body. The press head mechanism includes an abutting portion at a side facing the assembling station. The lifting mechanism includes a clamping portion at a side facing the assembling station, and the clamping portion is configured to move in a direction running away from the assembling station relative to the press head mechanism.

An end-shield for a rotating electric machine of a vehicle including a first end-shield half and a second end-shield half mechanically connected to each other by fixing means and defining an internal volume configured to house a rotor/stator assembly. The first end-shield half being intended to support at least one tensioner configured to tension a belt of the vehicle. The end-shield includes a load-spreading member extending between the first end-shield half and the second end-shield half. The load-spreading member is configured to partially transmit a force exerted by the tensioner on the first end-shield half to the second end-shield half. The load-spreading member is distinct from the fixing means.

An end-shield for a rotating electric machine of a vehicle including a first end-shield half and a second end-shield half mechanically connected to each other by fixing means and defining an internal volume configured to house a rotor/stator assembly. The first end-shield half being intended to support at least one tensioner configured to tension a belt of the vehicle. The end-shield includes a load-spreading member extending between the first end-shield half and the second end-shield half. The load-spreading member is configured to partially transmit a force exerted by the tensioner on the first end-shield half to the second end-shield half. The load-spreading member is distinct from the fixing means.

An electric motor has a housing with a main part and a side cover; a stator; a rotor having a rotor shaft; and a rolling bearing assembly located on a first side of the stator. The rotor shaft is mounted with the side cover via the first rolling bearing assembly, which transmit axial loads exerted on the rotor shaft to the side cover. The side cover is fixedly secured to the main part, located on the first side of the stator. The side cover abuts against the first rolling bearing assembly, so that said axial loads are transmitted to the main part by the side cover. When the side cover is not secured to the main part, the housing is open, allowing insertion of the rotor into the stator via the first side of the stator.

An electric motor has a housing with a main part and a side cover; a stator; a rotor having a rotor shaft; and a rolling bearing assembly located on a first side of the stator. The rotor shaft is mounted with the side cover via the first rolling bearing assembly, which transmit axial loads exerted on the rotor shaft to the side cover. The side cover is fixedly secured to the main part, located on the first side of the stator. The side cover abuts against the first rolling bearing assembly, so that said axial loads are transmitted to the main part by the side cover. When the side cover is not secured to the main part, the housing is open, allowing insertion of the rotor into the stator via the first side of the stator.