| 摘要 |
A diaphragm pump includes a drive shaft (2), a hub-like bearing member (3) fastened thereto and a radial ball bearing whose inner race (4) is pulled over the bearing member (3), with the ball bearing axis (5) intersecting the shaft axis (6) at a small angle and with the point of intersection (7) being spaced from the ball bearing. The pump further includes a wobble finger, essentially provided by a screw (11), which is fastened to the outer race (8) of the ball bearing so as to connect the outer race with a tightly clamped-in diaphragm (13). The point of penetration (24) of the wobble finger axis through the diaphragm (13), when its path of movement is in the center position, lies in the common plane with the point of intersection (7), this common plane being perpendicular to the shaft axis (6). The improvement provided by the invention is that the wobble finger is clamped to the outer race (8) of the ball bearing by means of a clamping member (9, 10) which acts in the direction of the ball bearing axis (5). A plurality of wobble fingers may be distributed around the circumference of the ball bearing and may each be connected with its own diaphragm or with the work faces of a common diaphragm (13). The clamping member may include two individual clamping claws or a ring which rests on the frontal face of the outer race (8) and has an associated counterring. |
