Bosch Rexroth MKE Series, Руководство по планированию проекта

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● couplings
● pinions
it is imperative that the following notes are observed.
Gearbox mounting on motors If gearboxes are mounted on motors, the thermal coupling of the motors on
machines or constructions changes.
Depending on the gearbox type, the heat development on the gearbox is dif‐
ferent. In any case, the heat dissipation of the motor via the flange is reduced
when gearboxes are mounted. This must be observed in project planning.
A reduction of the given performance data is necessary, to prevent overloading
of the motors when using gearboxes.
Fig.9-19: S1 characteristic curve of gearboxes
The indicated torques in the characteristic curves of the motor have
to be reduced by 10-20 % when mounting gearboxes.
Please, heed all further notes and specifications within this documentation for
the used gearboxes.
Redundant bearings If drive elements are mounted, a redundant bearing must be avoided. The tol‐
erances inevitably present in such cases will lead to additional forces acting on
the bearing of the motor shaft and, should the occasion arise, to a distinctly
reduced service life of the bearing.
If redundant attachment cannot be avoided, it is necessary to con‐
sult Bosch Rexroth.
Couplings The machine construction and the drive elements used must be carefully adap‐
ted to the motor type so that the loading limits of the shaft and the bearing are
not exceeded.
When connecting extremely stiff couplings, the radial force which
constantly changes the angular position may cause an impermis‐
sibly high load on the shaft and bearing.
Ball bearing pinion or helical teeth
drive pinions
Owing to thermal effects, the flange-sided end of the output shaft may shift by
0.6 mm in relation to the motor housing. If skew bevel driving pinions or bevel
gear pinions directly attached to the output shaft are used, this change in po‐
sition will lead to
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and Controls
Rexroth MKE Synchronous Motors | Project Planning Manual
Operating Conditions and Application Notes