| 摘要 |
PROBLEM TO BE SOLVED: To provide a mixer drum driving device suitable for miniaturizing an electric motor and a power source.SOLUTION: A mixer drum driving device includes an auxiliary hydraulic pump 5 capable of supplying a hydraulic oil to a hydraulic motor 3 independently from a hydraulic pump 4 so as to stir and rotate a mixer drum M as an auxiliary hydraulic device SD and two or more DC motors 6 which rotate and drive the auxiliary hydraulic pump 5. When an engine E is stopped during stirring and rotation of the mixer drum M, the two or more DC motors 6 are selectively operated according to a load of the mixer drum M to rotate and drive the auxiliary hydraulic pump 5. |
