| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a variable displacement vane pump capable of reducing vibration. <P>SOLUTION: This variable displacement vane pump comprises a cam ring 15 including a rotor 11 and forming a plurality of pump chambers 18, a first hydraulic pressure chamber 40 to be reduced when eccentricity of the cam ring is increased, a second hydraulic pressure chamber 41 to be enlarged when eccentricity of the cam ring is increased, an intake side pump chamber 85 for sucking working fluid, a discharge side pump chamber 86 for discharging working fluid, a discharge pipe 38 for supplying working fluid to external equipment, a first flow path 91 connecting the discharge side pump chamber and the discharge pipe to each other, an orifice 23 provided in the first flow path, a second flow path 92 connecting the discharge side pump chamber and the discharge pipe to each other through the second hydraulic pressure chamber, a first throttle 50 provided in the second flow path so as to be positioned upstream of the second hydraulic pressure chamber, a second throttle 51 provided in the second flow path so as to be positioned downstream of the second hydraulic pressure chamber, and a third flow path 93 connecting the discharge side pump chamber and the first hydraulic pressure chamber to each other. <P>COPYRIGHT: (C)2009,JPO&INPIT |
