| 摘要 |
An orbital hydraulic motor with frontal distribution and hydrostatic gap compensation comprises a fluted stator (13) containing a lobed rotor (12), and an inclined shaft (9) which is torsionally coupled to the rotor (12) and to the motion output shaft (4), there being provided, interposed between these latter, a header (15) and a distributor unit comprising a rotatable ring (19) and a fixed ring (22) which are constantly pressed tightly together against the header (15) by elastic means (29) acting on the fixed ring (22). The distributor unit (19, 22) embraces a cylindrical coupling (20) which itself embraces the inclined shaft (9), and which torsionally connects the motion output shaft (4) to the rotatable ring (19). On the side nearer the motion output shaft (4), the rotatable ring (19) and fixed ring (22) are provided with respective chambers for the inlet/outlet (24) and outlet/inlet (23) hydraulic fluid, which keeps the distributor unit (19, 22) pressed tightly together during the operation of the motor, said chambers (24), (23) being connected to the corresponding chambers of the motor unit (12, 13) by way of respective longitudinal channels (193, 17),(220, 191, 17), which are provided on the distributor unit (19, 22) and on the header (15).
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