JPH0255888A - Self-contained type hydraulic pump - Google Patents

Abstract

PURPOSE:To secure such a self-contained type pump that is less in a performance drop by installing a diaphragm in an eccentric cam attached to a motor shaft via a bearing, and installing an elastic body valve in this diaphragm. CONSTITUTION:When a motor shaft 12 is rotated, an eccentric cam 6 rotates as one body. Since a metal disk 51 is attached to the eccentric cam 6 via a bearing 7, this metal disk 51 moves in all directions. With operation of this metal dial 51, the diaphragm 5 is forcedly expanded or contracted between the disk 51 and a diaphragm receiver 4. The diaphragm 5 has an elastic body valve 52 in a boundary between a suction port 8 and a discharge port 9.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a self-priming liquid pump.

[Prior art and its problems] In conventional tube pumps, pressing is performed mechanically, but stretching is performed only by the elastic force of the tube, so there is a problem that the performance of the pump quickly deteriorates. Furthermore, tube pumps have the problem of not being able to increase the pump speed sufficiently, making it difficult to increase the discharge amount.

Furthermore, there is a problem in that it is prone to failure when high pressure is applied to the discharge port.

The present invention solves the above problems and is self-priming.

A self-priming liquid pump with less deterioration in pump performance, faster pump speed, and prevention of failure due to leakage within the pump when high pressure is applied to the discharge port, as well as a small number of parts and easy assembly and maintenance. The purpose is to provide.

[Means for Solving the Problems] In order to solve the above problems and achieve the object of the invention, the self-priming liquid pump according to the present invention is characterized by being configured as follows. That is, it has an eccentric cam attached to the motor shaft, and a diaphragm integrally formed on a metal disc attached to the eccentric cam via a bearing.The diaphragm is attached to the pump body, and the diaphragm has a suction It has an elastic valve at the boundary between the mouth and the discharge port, and is capable of sucking and discharging liquid by forcibly expanding and contracting the diaphragm in the direction of rotation.

[Example] DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below using embodiments shown in the drawings.

FIG. 1 is a partially cutaway front view of a self-priming liquid pump according to one embodiment, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is an explanatory diagram showing the state of the diaphragm immediately before suction. FIG. 54 is an explanatory diagram showing an intermediate state in which liquid is sucked, FIG. 5 is an explanatory diagram showing a state in which the sucked liquid is discharged through the discharge port, FIG. 6 is a cross-sectional diagram showing the sealed state of the diaphragm, and FIG. The figure is an explanatory diagram of the operation of the valve. Here, l is the motor, 11 is the motor body, 12 is the motor shaft, 2 is the pump body, 3
is the holding plate, 4 is the diaphragm holder, 5 is the diaphragm,
51 is a disc integrally molded with the diaphragm, 52 beam i
6 is an eccentric cam, 7 is a bearing, 8 is a suction port,
Reference numeral 9 indicates a discharge port, and 10 indicates a liquid. In an example not shown, an eccentric cam 6 is attached to a motor shaft 12. A metal disc 51 is attached to the eccentric cam 6 via a bearing 7. A diaphragm 5 is integrally formed on the metal disk 51. The diaphragm 5 is attached to the pump body 2 by a diaphragm receiver 4 and a holding plate 3.

Since this embodiment is formed as described above, when the motor shaft 12 rotates, the eccentric cam 6 rotates integrally with the motor shaft 12.

Since the metal disk 51 is attached to the eccentric cam 6 via the bearing 7, the metal disk 51 moves from side to side as shown in FIGS. 3 to 5. Move up and down as shown.

By the operation of the metal disk 51, the diaphragm 5 is forcibly expanded and contracted between the metal disk 51 and the diaphragm receiver 4, as shown in FIGS. 3 to 5.

Here, since the diaphragm 5 has an elastic valve 52 at the boundary between the suction port 8 and the discharge port 9, the suction port 8 and the discharge port 9 are separated by the elastic valve 52 at the boundary. .

The diaphragm 5 is activated by the operation of the metal disc 51.

Between the metal disc 51 and the diaphragm receiver 4, the third
When it is forcibly expanded and contracted as shown in FIGS. 3 to 5, liquid is sucked from the suction port 8 to part a in FIG.
Section a becomes section a in FIG. 4, then section a in FIG. 5, and the liquid sucked from the suction port 8 is discharged to the outside through the discharge port 9. Note that the arrows shown in FIGS. 3 to 5 indicate the rotational direction of the motor shaft 12. By forcibly expanding and contracting the diaphragm in the rotational direction in this way, liquid is continuously sucked and discharged. .

As mentioned above, the suction port 8 and the discharge port 9 are separated by the elastic valve 52 at the border, so when high pressure is applied to the discharge port 9, leakage occurs within the pump, and the suction port 8 and the discharge port 9 are separated. This protects the diaphragm 5 by eliminating the pressure difference between the diaphragm 5 and prevents failure.

Note that FIG. 6 is a cross-sectional view showing the sealed state of the diaphragm, and in this way, the liquid IO does not leak out and the diaphragm 5 can move freely.

[Effects of the Invention] Since the self-priming liquid pump according to the present invention is configured as described above, it is possible to forcibly expand and contract the diaphragm in the direction of rotation to suction and discharge liquid, and it is also self-priming. type, the pump performance is small, the pump speed is high, and the suction port and discharge port are elastic valves 52 at the border.
Since the pump is partitioned by a partition, when high pressure is applied to the discharge port, leakage inside the pump can be prevented and breakdowns can be prevented, and the number of parts is small and assembly and maintenance can be easily performed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway front view of a self-priming liquid pump according to the first embodiment, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. is an explanatory diagram showing the state immediately before suction of the diaphragm, FIG. 4 is an explanatory diagram showing an intermediate state in which liquid has been suctioned, FIG. 5 is an explanatory diagram showing a state in which the suctioned liquid is discharged through the discharge port, and FIG. 7 is a sectional view showing the sealed state of the diaphragm, and FIG. 7 is an explanatory view of the operation of the valve. No. 1: Motor 11, 11+1 Motor body 12: Motor shaft. 2...Pump body, 3-ψ/pressing plate, 4...Diaphragm receiver, 5...Diaphragm, 51...Disc integrally molded with the diaphragm, 52...
・Elastic body valve. 6.1111 Eccentric cam, 7. Bearing, 8. Suction port, 9. Discharge port, 10. Liquid. Agent Patent Attorney Elementary 1) Osamu Parent Figure 2 Figure 1

Claims (1)

[Claims] It has an eccentric cam attached to the motor shaft and a diaphragm integrally formed on a metal disc attached to the eccentric cam via a bearing.The diaphragm is attached to the pump body, and one diaphragm has a suction port. 1. A self-priming liquid pump comprising an elastic valve at the boundary between the diaphragm and the discharge port, the diaphragm being forcibly expanded and contracted in the direction of rotation to suck in and discharge liquid.