CN111520313A

CN111520313A - Novel eccentric structure of diaphragm pump

Info

Publication number: CN111520313A
Application number: CN202010545089.5A
Authority: CN
Inventors: 吴兵
Original assignee: Kamoer Fluid Technology Shanghai Co Ltd
Current assignee: Kamoer Fluid Technology Shanghai Co Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-08-11

Abstract

The invention discloses a novel eccentric structure of a diaphragm pump, the size of the whole machine is not changed on the premise of increasing the diameter of a driving shaft and thickening the wall thickness of an eccentric wheel, the service life of the whole machine is greatly prolonged, a machine body of a motor is fixedly arranged at the outer side of a pump body, a diaphragm is arranged between the pump body and a valve lower plate, a valve upper plate presses a valve sheet on the upper side of the valve lower plate, an integrated eccentric part is arranged in the pump body and comprises a push rod, a bearing outer ring, bearing balls, a bearing inner ring and the eccentric wheel, the bearing inner ring and the eccentric wheel are integrally formed, a power output shaft of the motor penetrates through the pump body and then is inserted into an eccentric through hole of the eccentric wheel, the power output shaft of the motor is fixed with the eccentric wheel through a screw, the bearing outer ring and the bearing balls are arranged on the bearing inner ring in, the eccentric wheel drives the bearing outer ring to push the ejector rod to reciprocate up and down, so that the diaphragm is driven to work.

Description

Novel eccentric structure of diaphragm pump

Technical Field

The invention discloses a novel eccentric structure of a diaphragm pump, and belongs to the technical field of diaphragm pumps.

Background

The diaphragm pump motor passes through the drive shaft and drives the cam and rotate, discovery in the miniaturized in-process of diaphragm pump, there is certain problem between drive shaft and the eccentric wheel, the drive shaft is too thick can lead to the wall thickness of eccentric wheel too thin, otherwise, then the drive shaft is thin, present diaphragm pump is in order to compromise the overall structure compactness of the two performance and diaphragm pump, cause the drive shaft to have the too thin problem of wall thickness of thin and eccentric wheel, lead to the two spoilage very high in the course of the work, influence the life of complete machine.

Disclosure of Invention

The invention overcomes the defects in the prior art, provides a novel eccentric structure of the diaphragm pump, and has the advantages that the size of the whole diaphragm pump is not changed on the premise of increasing the diameter of a driving shaft and thickening the wall thickness of an eccentric wheel, so that the service life of the whole diaphragm pump is greatly prolonged.

In order to solve the technical problems, the invention adopts the technical scheme that: a novel eccentric structure of a diaphragm pump comprises a motor, a pump body, a diaphragm, a valve lower plate, a valve block and a valve upper plate, wherein the body of the motor is fixedly arranged at the outer side of the pump body, the diaphragm is arranged between the pump body and the valve lower plate, the valve upper plate presses the valve block on the upper side of the valve lower plate, an integrated eccentric part is arranged in the pump body and comprises a push rod, a bearing outer ring, a bearing ball, a bearing inner ring and an eccentric wheel, the bearing inner ring and the eccentric wheel are integrally formed, a power output shaft of the motor penetrates through the pump body and then is inserted into an eccentric through hole of the eccentric wheel, the power output shaft of the motor is fixed with the eccentric wheel through a screw, the bearing outer ring is arranged on the bearing inner ring in a matching manner with the bearing ball, the numerical value of the push rod is fixed on the upper, the eccentric wheel drives the bearing outer ring to push the ejector rod to reciprocate up and down, so that the diaphragm is driven to work.

The outer diameters of the bearing inner ring and the eccentric wheel are the same.

The wall thickness of the eccentric wheel is larger than 1 mm.

Compared with the prior art, the invention has the beneficial effects that: the eccentric wheel and the bearing inner ring are integrally formed to form the eccentric bearing, which is equivalent to the fact that the thickness of the bearing inner ring is increased on the outer side of the existing eccentric wheel, so that the wall thickness of the eccentric wheel is further thickened, namely under the condition of certain wall thickness, the power output shaft of the motor can be further thickened, the size of the whole machine is not changed, and the service life of the whole machine is greatly prolonged.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

FIG. 3 is a schematic structural view of the integrated eccentric member of the present invention.

Fig. 4 is a schematic diagram of an eccentric configuration in the prior art.

In the figure: 1 is a motor, 2 is a pump body, 3 is a diaphragm, 4 is a valve lower plate, 5 is a valve plate, 6 is a valve upper plate, 7 is an integrated eccentric part, 71 is an ejector rod, 72 is a bearing outer ring, 73 is a bearing ball, 74 is a bearing inner ring, and 75 is an eccentric wheel.

Detailed Description

As shown in fig. 1 to 3, the novel eccentric structure of the diaphragm pump of the present invention comprises a motor 1, a pump body 2, a diaphragm 3, a valve lower plate 4, a valve sheet 5 and a valve upper plate 6, wherein a body of the motor 1 is fixedly disposed on an outer side of the pump body 2, the diaphragm 3 is disposed between the pump body 2 and the valve lower plate 4, the valve upper plate 6 presses the valve sheet 5 on an upper side of the valve lower plate 4, an integrated eccentric member 7 is disposed in the pump body 2, the integrated eccentric member 7 comprises a top rod 71, a bearing outer ring 72, a bearing ball 73, a bearing inner ring 74 and an eccentric wheel 75, the bearing inner ring 74 and the eccentric wheel 75 are integrally formed, a power output shaft of the motor 1 penetrates through the pump body 2 and is inserted into an eccentric through hole of the eccentric wheel 75, and is fixed with the eccentric wheel 75 by a screw, the bearing outer ring 72 and the bearing ball 73 are disposed on the bearing inner, the numerical value of the ejector rod 71 is fixed on the upper part of the outer side of the bearing outer ring 72, the upper end of the ejector rod 71 is connected with the diaphragm 3, and the eccentric wheel 75 drives the bearing outer ring 72 to push the ejector rod 71 to reciprocate up and down to drive the diaphragm 3 to work.

The outer diameters of the bearing inner ring 74 and the eccentric wheel 75 are the same.

The wall thickness of the eccentric wheel 75 is greater than 1 mm.

In the invention, the bearing outer ring 72 can also be inserted into the sleeve, and the ejector rod 71 is fixedly arranged outside the sleeve.

The invention has convenient installation, omits the procedure of installing an eccentric wheel, and can use a thicker motor shaft diameter on the premise of the same other parameters of the pump body compared with the prior art shown in figure 4.

The invention reduces labor cost and material loss (the eccentric wheel in the prior art is easy to damage the bearing when the bearing inner ring is mounted by riveting), and the invention increases the load capacity of the pump, improves the product performance and prolongs the service life of the product.

The eccentric wheel and the bearing inner ring are combined with each other to form the eccentric bearing, and the positioning ring and the eccentric bearing are integrally injected and molded.

The invention converts the rotary motion into the up-and-down reciprocating motion to push the diaphragm to reciprocate up and down by the motor-driven integrated positioning ring (eccentric structure), so that the volume in the compression cavity is changed.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A novel eccentric structure of a diaphragm pump comprises a motor (1), a pump body (2), a diaphragm (3), a lower valve plate (4), a valve plate (5) and an upper valve plate (6), wherein the body of the motor (1) is fixedly arranged on the outer side of the pump body (2), the diaphragm (3) is arranged between the pump body (2) and the lower valve plate (4), the valve plate (5) is pressed on the upper side of the lower valve plate (4) by the upper valve plate (6), the novel diaphragm pump is characterized in that an integrated eccentric part (7) is arranged in the pump body (2), the integrated eccentric part (7) comprises an ejector rod (71), a bearing outer ring (72), a bearing ball (73), a bearing inner ring (74) and an eccentric wheel (75), the bearing inner ring (74) and the eccentric wheel (75) are integrally formed, and a power output shaft of the motor (1) penetrates through the pump body (2) and then is inserted into an eccentric through hole of the, the power output shaft of the motor (1) is fixed with the eccentric wheel (75) through a screw, the bearing outer ring (72) and the bearing balls (73) are arranged on the bearing inner ring (74) in a matched mode, the ejector rod (71) is fixed to the upper portion of the outer side of the bearing outer ring (72) in a numerical mode, the upper end of the ejector rod (71) is connected with the diaphragm (3), the bearing outer ring (72) is driven through the eccentric wheel (75) to push the ejector rod (71) to reciprocate up and down, and the diaphragm (3) is driven to work.

2. A new type of eccentric structure of diaphragm pump according to claim 1, characterized in that the outer diameter of the bearing inner ring (74) and the eccentric wheel (75) are the same size.

3. A new type of eccentric construction of a membrane pump according to claim 1, characterized in that the wall thickness of the eccentric (75) is more than 1 mm.