Patent ID: 9481106
Filing Date: 2016-11-01
CPC Classification: B28C,F16H

Claim Text:
1. A mixer drum driving device, comprising: a mixer drum rotatably mounted on a chassis of a mixer truck; a hydraulic motor configured to drive and rotate the mixer drum; a hydraulic pump configured to be driven by the power of an engine of the mixer truck to supply pressure oil to the hydraulic motor; an auxiliary hydraulic pump configured to drive and rotate the mixer drum by supplying pressure oil to the hydraulic motor independently of the hydraulic pump; a direct-current brush motor configured to drive the auxiliary hydraulic pump; an operation mode selector configured to select an operation mode of the mixer drum including mixing, pouring, and discharging; and a controller configured to, in response to the operation mode selected by the operation mode selector, drive only the hydraulic pump by the engine of the mixer truck to drive and rotate the mixer drum, when the selected operation mode corresponds to pouring or discharging, and drive only the auxiliary hydraulic pump by the direct-current brush motor to drive and rotate the mixer drum, when the selected operation mode corresponds to mixing.