| 摘要 |
<p>PURPOSE:To reduce a degree of sliding resistance between a plunger and a cam ring as well as to make a pump smoothly rotatable at high speed, besides compact in size, by setting the cam ring down to a guide ring consisting of both inner and outer rings and rollers. CONSTITUTION:An inner ring 4a coming into contact with a plunger 3 is installed. Then, an outer ring 4b is installed in an outer side of the inner ring 4a via a roller 4c. And, a first roller 51 and a second roller 61 are installed in each of first and second control pistons 50 and 60 comtacting with the outer ring 4b. With both these rollers 51 and 61, the outer ring 4b and these control pistons 50 and 60 are all constituted so as to come into rolling contact with one another.</p> |
