Patent ID: 8616758
Filing Date: 2013-12-31
Classification: B28C,F15B

Abstract:
1. A mixer drum driving device that is configured to rotate a mixer drum mounted on a frame of a mixer truck, comprising: a hydraulic motor that is configured to rotate the mixer drum; a first hydraulic pump that is configured to be driven by an engine of the mixer truck to be capable of supplying a working oil to the hydraulic motor; an electric motor that is configured to function as a drive source or a power generator; a power supply connected to the electric motor; a second hydraulic pump that is configured to be capable of supplying the working oil to the hydraulic motor on the basis of a driving force of the electric motor; and a flow dividing valve that is configured to divide the working oil discharged from the first hydraulic pump and to supply the working oil to the hydraulic motor and the second hydraulic pump, wherein the second hydraulic pump is configured to rotate the electric motor when driven by the working oil supplied via the flow dividing valve, and the electric motor is configured to generate electric power when driven to rotate by the second hydraulic pump and to supply the electric power to the power supply.