| 摘要 |
PROBLEM TO BE SOLVED: To provide a gear pump capable of miniaturizing the whole of a hydraulic device, and capable of simplifying a structure.SOLUTION: An internal gear pump 1 includes a housing 2 having a storage chamber 4 therein and constituted by a first body 3 and a second body 15, a cover body 20 fixed on a rear end of the housing 2, and an external gear 70 and an internal gear 80 stored in the storage chamber 4. A first recession 7 and a second recession 8 are formed in the first body 3, and two through holes 9 and 10 penetrating from the recessions 7 and 8 to a rear end surface of the first body 3 are formed. In the cover body 20, first and second valve assemblies 30 and 45 are arranged facing each other in an internal space thereof, and first and second supply flow passages for supplying working fluid to back surfaces of valve elements 35 and 50 constituting the first and the second valve assemblies 30 and 45, and a branch flow passage branched from the supply flow passages and communicating the two supply flow passages are formed. |
