Diaphragm pump
First Claim
1. A diaphragm pump comprising:
- a diaphragm including a deformed portion that forms a part of a wall of a pump chamber;
a crank body fixed to a rotating shaft of a motor;
a driving shaft including one end fixed to a position of the crank body decentered from the rotating shaft and tilting with respect to the rotating shaft;
a driving body configured to convert a rotation of the crank body into a reciprocal motion and transmit the reciprocal motion to the deformed portion, the driving body including a shaft portion including a shaft hole in which the driving shaft is rotatably fitted, and an arm portion projecting from the shaft portion outward in a radial direction and connected to the deformed portion, the shaft hole comprising a non-through hole including an opening-side end and a closed-side end each including an inner peripheral surface that contacts the driving shaft over a whole circumference, and the shaft portion including an oil storage that opens to a region between the opening-side end and the closed-side end of the shaft hole, the oil storage including an end closed to an outward direction in the radial direction; and
a pump mechanism configured to alternately repeat a state in which a fluid is discharged from the pump chamber and a state in which the fluid is sucked into the pump chamber along with the reciprocal motion of the driving body.
2 Assignments
0 Petitions
Accused Products
Abstract
A diaphragm pump (1) includes a driving body (33) configured to convert a rotation of a crank body (31) into a reciprocal motion and transmit the reciprocal motion to a deformed portion (11) of a diaphragm (7). The driving body (33) includes a shaft portion (36) including a shaft hole (43) in which a driving shaft (32) fixed to the crank body is rotatably fitted. The shaft hole is a non-through hole including an opening-side end (43a) and a closed-side end (43b) each including an inner peripheral surface that contacts the driving shaft over a whole circumference. The shaft portion includes an oil storage (44) opening to a region between the opening-side end and the closed-side end of the shaft hole.
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Citations
4 Claims
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1. A diaphragm pump comprising:
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a diaphragm including a deformed portion that forms a part of a wall of a pump chamber; a crank body fixed to a rotating shaft of a motor; a driving shaft including one end fixed to a position of the crank body decentered from the rotating shaft and tilting with respect to the rotating shaft; a driving body configured to convert a rotation of the crank body into a reciprocal motion and transmit the reciprocal motion to the deformed portion, the driving body including a shaft portion including a shaft hole in which the driving shaft is rotatably fitted, and an arm portion projecting from the shaft portion outward in a radial direction and connected to the deformed portion, the shaft hole comprising a non-through hole including an opening-side end and a closed-side end each including an inner peripheral surface that contacts the driving shaft over a whole circumference, and the shaft portion including an oil storage that opens to a region between the opening-side end and the closed-side end of the shaft hole, the oil storage including an end closed to an outward direction in the radial direction; and a pump mechanism configured to alternately repeat a state in which a fluid is discharged from the pump chamber and a state in which the fluid is sucked into the pump chamber along with the reciprocal motion of the driving body. - View Dependent Claims (2, 3, 4)
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Specification