| 摘要 |
<p>A four-compression-chamber diaphragm pump including a motor, a pump head body 60, a roundel mount 50 situated on the pump head body and four eccentric roundels 52 having a top face with a fastening bore, a diaphragm membrane 70 fixed to the four eccentric roundels through the four operating holes, and four pumping pistons 80, wherein the roundel mount is situated on a wobble plate resulting in sequential movement of the four eccentric roundels causing sequential, reciprocating movement of four piston acting zones, the diaphragm membrane further includes four annular downwardly-projecting positioning protrusions 76 arranged to be inserted into a respective annular positioning groove in a top surface of the eccentric roundels 55, and a section of the top face of each eccentric roundel is inclined relative to horizontal to form a sloped top ring, the pump head body includes first curved vibration-reducing positioning structures 65 at each operating hole on the upper side of the pump head body, the diaphragm membrane includes second curved positioning structures 77 at a respective position on the diaphragm membrane, the first positioning structure mates with the corresponding second positioning structure</p> |
