| 摘要 |
Smoothness in sliding movement of a moving body getting a large structure and durability of its slide supporting means (e.g., bearing) are improved by structural contrivance of providing a bearing also at a position other than a pump shaft. In a reciprocating pump composed of a pump body (1) having a suction passage (12) and a discharge passage (13) of fluid, a pair of diaphragms (2) being secured airtightly to the opposite ends thereof, a pump shaft (15) fixed to the tip of each diaphragm (2), a pair of pump flanges (4) for supporting each pump shaft (15) slidably and integrated with the pump body (1) through a coupling body (16) arranged outside the diaphragm (2), a coupling rod (18) for connecting the coupling plates (17) being fixed to the tip (15B) projecting from the pump flanges (4) of each pump shaft (15) under such a state as the coupling plates (17) penetrate each pump flange (4) and arranged outside the diaphragm (2), and a cover tube (6) provided across the pair of pump flanges (4) to surround the coupling rod (18), the coupling rod (18) is supported slidably through a sliding bearing (27) supported on each pump flange (4).
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