Gear pump used for supplying lubricating oil to an internal combustion engine comprises a volume-changing shifting unit, drive gear meshing with first gear and further driven gear so that one of the gears is arranged between the others

摘要

Gear pump comprises a volume-changing shifting unit (16) and a drive gear (10) meshing with a first driven gear (12). At least one further driven gear (14) is provided so that one of the gears is arranged between the other gears and meshes with the other gears. Preferred Features: The pressure sides (26, 30) and suction sides (24, 28) formed by the driven gears are joined together in a pump housing. All the gears are arranged in one plane and two gears are always meshing with each other.