CPC F04B 39/0005 (2013.01) [F04B 39/1066 (2013.01); F04B 39/121 (2013.01)] | 17 Claims |
1. A pump body, comprising:
a cylinder assembly, comprising a cylinder;
a piston, movably disposed in the cylinder;
a motion transmission structure; and
a drive member, drivingly connected to the piston through the motion transmission structure,
wherein an outer peripheral wall of the piston has a rail groove connected end to end in a circumferential direction, and the cylinder has a guide structure extending into the rail groove , or
an inner surface of the cylinder has a rail groove connected end to end in a circumferential direction, and the piston has a guide structure extending into the rail groove,
and thus through driving of the piston by the drive member, the piston is capable of rotating relative to the cylinder while reciprocating along a rotating axis of the piston;
wherein the rail groove is a continuous wave-shaped curved line rail groove;
wherein the wave-shaped curved line rail groove is a sine or cosine wave-shaped curved line rail groove; and
wherein numbers of crests and troughs of the sine or cosine wave-shaped curved line rail groove in the circumferential direction of the cylinder or the piston are equal, and both numbers of the crests and the troughs are greater than or equal to 2.
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