| 摘要 |
<p>Roundel structure 52 for four-compression-chamber diaphragm pump, the roundel structure comprising a roundel mount 50 with four eccentric roundels mounted on the roundel mount that can extend through a pump head body 60, where the roundels have an annular positioning groove 55 on the top face of the roundels, with the purpose of receiving downwardly projecting positioning protrusions 76 of a diaphragm, and where a section of the top surface of the roundels is inclined to the horizontal to form slope between the annular positioning groove and a vertical or inverted frustoconical flank of the eccentric roundel. By providing the sloped top ring, the oblique high frequency pulling and squeezing phenomenon that occurs in a conventional tubular eccentric roundel is completely eliminated. The eccentric roundel mount may include a central bearing for receiving an integral cam-lobed shaft of a wobble plate.</p> |
