| 摘要 |
The invention pertains to a hydraulic rotary drive for the rotating rod assembly of a drilling machine which contains at least two hydraulic motors (1-3) with the motor shafts (34-36) that are connected to a common output shaft (11) by means of a gear, with a clutch (4-6) being arranged between the motor shaft (34-36) of each hydraulic motor (1-3) and the gear such that the rotational movement of each hydraulic motor (1-3) can be disengaged from the rotational movement of the output shaft (11). The invention aims to develop a highly variable rotary drive for ground and rock drilling machines. According to the invention, this objective is attained due to the fact that: (1) the gear is formed by pinions (7-9) that are each connected to a corresponding motor shaft (34-36) by means of a corresponding clutch (4-6), with said pinions engaging a toothed wheel (10) arranged on the output shaft (11), and (2) the housings of the hydraulic motors (1-3) have identical connection dimensions, with the hydraulic motors having different intake volumes.
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