| 摘要 |
In a multi-cylinder (1) displacement pump with a wobble plate (7) driving the piston (5) and being driven by a rotating wobble rotor (8) with an inclined bearing surface (9), the wobble plate (7) "floats", being held in place solely by rounded ends (6) on the pistons (5) engaging a groove (17) in the wobble plate (7) and urging the latter against a thrust bearing (14, 15, 16) between the wobble plate (7) and the wobble rotor (8). The groove (17) has a slightly larger radius of curvature (20) than that (21) of the piston ends (6), thus allowing for the slight deviation between the circular groove (17) and the slightly elliptic locus of the piston ends (6). With this arrangement it is possible to use a single wobble plate (as distinct from individual slide pads for each piston) with no other means to keep it in place than the pistons with which it cooperates. |
