(57) A hydraulic servomotor control assembly is disclosed, for example a hydraulic servomotor
control assembly which supplies the pressurized oil as operating fluid to a hydraulic
motor 1, and which controls the volume of the pressurized fluid by means of a servo
valve 2. In hydraulic servomotors of the prior art, the hydraulic motor and the tachogenerator
or rotational speed sensor device for detecting the rotation, are two separate entities,
so that the servomotor must be quite large, and it is difficult to find ways to make
it any smaller. In contrast to such prior art, the hydraulic servomotor control assembly
according to this invention is distinguished by the fact that a hydraulic motor 1
and a rotational speed detector device (13, 17, 20) are shaft coupled and integral
with each other, so that the resulting assembly is both compact and stable.
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