CN216198742U

CN216198742U - Plunger pump

Info

Publication number: CN216198742U
Application number: CN202121786807.4U
Authority: CN
Inventors: 雷澳
Original assignee: Shenzhen Huachuang Science And Technology Co ltd
Current assignee: Shenzhen Huachuang Science And Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-04-05
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses a plunger pump, which comprises a cylinder body, a plunger and a transmission shaft, wherein the cylinder body is provided with a cylinder cover; the end part of the plunger slidably penetrates through the cylinder body, one side of the plunger is provided with a groove, and the other side of the plunger is provided with a slotted hole which runs through the groove and the outer side wall of the plunger; both ends of the transmission shaft are rotatably connected to the cylinder body, the transmission shaft is perpendicular to the plunger, and the transmission shaft penetrates through the slot and is in slidable abutting connection with the slot; an eccentric wheel is arranged on the transmission shaft, and the outer circumferential surface of the eccentric wheel can be in slidable abutting joint with the inner side wall of the groove; just because set up on the plunger and supply the slotted hole that the transmission shaft passed and the both ends of transmission shaft all are connected in the cylinder body, consequently can prevent transmission shaft along its radial swing, reduce the running resistance and the noise of plunger.

Description

Plunger pump

Technical Field

The utility model relates to the field of liquid pumping devices, in particular to a plunger pump.

Background

The plunger pump is generally applied to a high-pressure water gun or other tools, and a plunger in the plunger pump reciprocates in a straight line to pump out liquid. When the plunger of the existing plunger pump reciprocates under the driving of the driving mechanism, only one end of a driving shaft of the driving mechanism is connected to the body of the plunger pump, so that the driving shaft inevitably swings in the radial direction, great noise is generated, extra resistance is generated, and the driving mechanism can drive the plunger to move only by adding a gearbox. The addition of a gearbox will undoubtedly further increase the noise of the plunger pump and lead to an increase in the cost of the plunger pump product.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a plunger pump to solve the problems of large plunger running resistance and large noise of the conventional plunger pump.

The purpose of the utility model is realized by adopting the following technical scheme:

a plunger pump comprises a cylinder body, a plunger and a transmission shaft;

the end part of the plunger piston can be slidably arranged in the cylinder body in a penetrating way, one side of the plunger piston is provided with a groove, and the other side of the plunger piston is provided with a groove hole which is communicated with the groove and the outer side wall of the plunger piston;

the two ends of the transmission shaft are rotatably connected to the cylinder body, the transmission shaft is perpendicular to the plunger, and the transmission shaft penetrates through the slot and is in slidable abutting connection with the slot;

the transmission shaft is provided with an eccentric wheel, and the outer circumferential surface of the eccentric wheel can be slidably abutted against the inner side wall of the groove.

In some optional embodiments, the cylinder further comprises a motor, the motor is fixedly connected to the cylinder, one end of the transmission shaft is connected to a main shaft of the motor, and the other end of the transmission shaft is rotatably connected to the cylinder.

In some alternative embodiments, a first bearing is provided between the end of the drive shaft and the cylinder block.

In some alternative embodiments, a second bearing is disposed between the outer circumferential surface of the eccentric and the inner side wall of the groove.

In some optional embodiments, the eccentric wheel comprises a first shaft body and a second shaft body which are connected, wherein the outer diameter of the first shaft body is larger than that of the second shaft body, so that the end part of the first shaft body close to the second shaft body forms a step end face, and the second bearing abuts against the step end face.

In some alternative embodiments, the slot is a kidney-shaped slot.

In some optional embodiments, the cylinder body includes a first cylinder and a second cylinder which are arranged oppositely, and both ends of the plunger slidably penetrate through the first cylinder and the second cylinder respectively.

Compared with the prior art, the utility model has the beneficial effects that:

the transmission shaft drives the plunger piston to do reciprocating motion along a straight line through the eccentric wheel and the groove on the plunger piston so as to pump out liquid, meanwhile, the transmission shaft penetrates through and is in slidable abutting joint with the slotted hole of the plunger piston, and just because the slotted hole for the transmission shaft to penetrate is formed in the plunger piston and the two ends of the transmission shaft are both connected with the cylinder body, the transmission shaft can be prevented from swinging along the radial direction of the transmission shaft, the running resistance and the noise of the plunger piston are reduced, and the service life of the transmission shaft can be prolonged.

Drawings

Fig. 1 is an exploded schematic view of a plunger pump of the utility model;

fig. 2 is a schematic sectional view of the plunger pump of the present invention;

fig. 3 is a schematic sectional exploded view of the plunger pump of the present invention;

fig. 4 is a schematic structural view of an eccentric wheel of the plunger pump of the utility model;

in the figure:

10. a cylinder body; 11. a first cylinder; 12. a second cylinder; 20. a plunger; 21. a groove; 22. a slot; 30. a drive shaft; 31. an eccentric wheel; 311. a first shaft body; 312. a second shaft body; 313. a step end face; 40. a motor; 50. a first bearing; 60. a second bearing.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, a plunger pump of the present invention is schematically shown, and includes a cylinder 10, a plunger 20 and a transmission shaft 30, wherein the plunger 20 has a cylindrical structure.

The end of the plunger 20 slidably penetrates through the cylinder 10, the plunger 20 can reciprocate in the cylinder 10 along a straight line to pump the liquid in the cylinder 10 out of the cylinder 10, and certainly, the cylinder 10 is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet arranged on the cylinder 10 are the prior art, so that the detailed description is omitted here.

One side of the plunger 20 is provided with a groove 21, and the other side of the plunger 20 is provided with a groove hole 22 penetrating through the groove 21 and the outer side wall of the plunger 20. Wherein, two inner side walls of the groove 21 are both parallel to the end surface of the plunger 20, and the bottom wall of the groove 21 is provided with the above-mentioned slot 22.

Both ends of the transmission shaft 30 are rotatably connected to the cylinder 10, an eccentric wheel 31 is provided on the transmission shaft 30, and the outer circumferential surface of the eccentric wheel 31 slidably abuts against the inner side wall of the groove 21. When the drive shaft 30 rotates, the eccentric 31 follows the rotation of the drive shaft 30, and the eccentric 31 pushes against the inner side wall of the groove 21 to force the plunger 20 to reciprocate in the axial direction thereof.

The transmission shaft 30 is perpendicular to the plunger 20, the transmission shaft 30 is inserted into and slidably abutted against the slot 22, the transmission shaft 30 is abutted against the inner wall surface of the slot 22, so the transmission shaft 30 can prevent the plunger 20 from rotating around the axis thereof, and the plunger 20 is provided with the slot 22 for the transmission shaft 30 to pass through, and both ends of the transmission shaft 30 are connected to the cylinder body 10, so the transmission shaft 30 can be prevented from swinging along the radial direction thereof, and the running resistance and the noise of the plunger 20 can be reduced. Just because the operating resistance of the plunger 20 is greatly reduced, the plunger pump of the present invention eliminates the need for a gearbox, saves cost and reduces noise. Wherein, the slot 22 is of a waist circle shape.

In some optional embodiments, the plunger pump further comprises a motor 40, the motor 40 is fixedly connected to the cylinder 10, one end of the transmission shaft 30 is connected to a main shaft of the motor 40, and the other end of the transmission shaft 30 is rotatably connected to the cylinder 10 through a first bearing 50, i.e., the first bearing 50 is arranged between the end of the transmission shaft 30 and the cylinder 10. Both ends of the transmission shaft 30 are rotatably connected to the cylinder body 10, so that the operation stability of the transmission shaft 30 is improved, and the transmission shaft 30 is prevented from swinging along the radial direction thereof. The main shaft of the motor 40 and the transmission shaft 30 may be an integral structure or a separate structure.

In order to reduce noise and friction at the connection between the eccentric 31 and the plunger 20, a second bearing 60 is provided between the outer circumferential surface of the eccentric 31 and the inner side wall of the groove 21.

In some alternative embodiments, as shown in fig. 4, the eccentric 31 includes a first shaft body 311 and a second shaft body 312 connected together, an outer diameter of the first shaft body 311 is larger than an outer diameter of the second shaft body 312, such that an end portion of the first shaft body 311 near the second shaft body 312 forms a stepped end surface 313, the second bearing 60 abuts against the stepped end surface 313, and the stepped end surface 313 can limit the position of the second bearing 60, so as to prevent the second bearing 60 from sliding along the axial direction of the eccentric 31.

The cylinder body 10 comprises a first cylinder 11 and a second cylinder 12 which are oppositely arranged, and two ends of the plunger 20 respectively penetrate through the first cylinder 11 and the second cylinder 12 in a sliding manner, so that the plunger 20 can perform liquid pumping twice every time the plunger moves back and forth, and the working efficiency of the plunger pump is improved.

Compared with the prior art, the utility model has the beneficial effects that:

the transmission shaft 30 drives the plunger 20 to reciprocate along a straight line through the eccentric wheel 31 and the groove 21 on the plunger 20 so as to pump liquid, meanwhile, the transmission shaft 30 penetrates through and is in slidable abutting contact with the slot hole 22 of the plunger 20, and just because the plunger 20 is provided with the slot hole 22 for the transmission shaft 30 to penetrate through and two ends of the transmission shaft 30 are connected to the cylinder body 10, the transmission shaft 30 can be prevented from swinging along the radial direction, the running resistance and noise of the plunger 20 are reduced, and the service life of the transmission shaft can be prolonged.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A plunger pump is characterized by comprising a cylinder body, a plunger and a transmission shaft;

2. The plunger pump of claim 1, further comprising a motor fixedly connected to the cylinder block, wherein one end of the transmission shaft is connected to a main shaft of the motor, and the other end of the transmission shaft is rotatably connected to the cylinder block.

3. The plunger pump of claim 2, wherein a first bearing is disposed between the end of the drive shaft and the cylinder block.

4. The plunger pump of claim 1, wherein a second bearing is disposed between the outer circumferential surface of the eccentric and the inner side wall of the groove.

5. The plunger pump of claim 4, wherein the eccentric comprises a first shaft body and a second shaft body connected together, the first shaft body having an outer diameter greater than an outer diameter of the second shaft body such that the first shaft body forms a stepped end surface adjacent to an end of the second shaft body, and the second bearing abuts against the stepped end surface.

6. The plunger pump of claim 1, wherein the slot is waisted.

7. The plunger pump according to claim 1, wherein the cylinder comprises a first cylinder and a second cylinder which are arranged oppositely, and two ends of the plunger slidably penetrate through the first cylinder and the second cylinder respectively.