CN215805140U - Pump and cleaning device - Google Patents

Abstract

The utility model discloses a pump and a cleaning device, which relate to the technical field of pressure devices, and the pump comprises: the pump body is provided with a liquid inlet and a liquid outlet, and liquid enters the pump body from the liquid inlet and leaves the pump body from the liquid outlet; the first impeller is arranged in the pump body; the first driving elliptic gear drives the first driven elliptic gear to rotate together, and the first driven gear is connected with the first impeller through a first shaft and can drive the first impeller to rotate together; the second impeller is arranged in the pump body; the second gear set comprises a second driving elliptic gear and a second driven elliptic gear, the second driving elliptic gear drives the second driven elliptic gear to rotate together, and the second driven gear is connected with the second impeller through a second shaft; and so on. This application can be in the effectual noise reduction under the prerequisite of the delivery pressure of guaranteeing the pump and flow.

Description

Pump and cleaning device

Technical Field

The utility model relates to the technical field of pressure devices, in particular to a pump and a cleaning device.

Background

The plunger pump is an important device for generating hydraulic pressure, changes the volume of a fluid channel for sealing work by means of reciprocating motion of a plunger in a pump body to realize pressurization and delivery of fluid, and has the advantages of high rated pressure, compact structure, high efficiency, convenience in flow regulation and the like. But has the disadvantage of a smaller flow rate than other types of pumps under equivalent conditions.

At present, the conventional high-pressure cleaning machine on the market mostly uses a plunger pump as a driving device, and because the flow rate of the pump is small, the rotating speed of a motor of the pump must be higher in order to obtain higher flow rate, the noise emitted by the whole pump is larger, and the use experience of a user is seriously influenced. In addition, a displacement pump is also adopted in some high-pressure cleaning machines, but the flow rate of the displacement pump with a single blade is smaller, so that the requirement of a user cannot be met at present.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above defects in the prior art, embodiments of the present invention provide a pump and a cleaning apparatus, which can effectively reduce noise while ensuring output pressure and flow rate of the pump, and have a high utilization rate of the internal volume of the pump body.

The specific technical scheme of the embodiment of the utility model is as follows:

a pump, comprising:

the pump body is provided with a liquid inlet and a liquid outlet, and liquid enters the pump body from the liquid inlet and leaves the pump body from the liquid outlet;

the first impeller is arranged in the pump body;

the first driving elliptic gear drives the first driven elliptic gear to rotate together, and the first driven elliptic gear is connected with the first impeller through a first shaft and can drive the first impeller to rotate together;

the second impeller is arranged in the pump body;

the second gear set comprises a second driving elliptic gear and a second driven elliptic gear, the second driving elliptic gear drives the second driven elliptic gear to rotate together, and the second driven elliptic gear is connected with the second impeller through a second shaft and can drive the second impeller to rotate together;

the first impeller and the second impeller rotate around a first rotation center line together, and the rotation centers of the first driving elliptic gear and the second driving elliptic gear are superposed with the respective centers; the first impeller, the second impeller and the pump body cooperate to define a plurality of accommodating cavities, the accommodating cavities can be in fluid communication with the liquid inlet and the liquid outlet, and the first impeller and the second impeller move relatively to change the volume of the accommodating cavities so as to pressurize the liquid in the accommodating cavities.

Preferably, an included angle which is not equal to zero is formed between the long axis of the first driving elliptic gear and the long axis of the second driving elliptic gear.

Preferably, the major axis of the first driving elliptic gear is perpendicular to the major axis of the second driving elliptic gear.

Preferably, the first driven elliptic gear and the second driven elliptic gear rotate together around the first rotation center line.

Preferably, the first shaft is inserted into the second shaft, and the first shaft and the second shaft rotate around the first rotation center line.

Preferably, the first driving elliptic gear and the second driving elliptic gear rotate around a second rotation center line together, and the first rotation center line is parallel to the second rotation center line.

Preferably, an end of a major axis of the first driven elliptical gear is capable of meshing with an end of a minor axis of the first driving elliptical gear; the end part of the long shaft of the second driven elliptic gear can be meshed with the end part of the short shaft of the second driving elliptic gear.

Preferably, the length of the major axis of the first driven elliptical gear plus the length of the minor axis of the first driving elliptical gear is equal to the length of the major axis of the second driven elliptical gear plus the length of the minor axis of the second driving elliptical gear.

Preferably, the rotating speed of the first impeller and the rotating speed of the second impeller are in the range of 50-5000 revolutions per minute.

A cleaning device comprises the pump, and further comprises a motor, wherein the motor drives the first driving elliptic gear and the second driving elliptic gear to rotate; the spray head mechanism is communicated with the liquid outlet of the pump and is used for spraying the water pressurized by the pump; the water inlet end can be communicated with the liquid inlet and is used for inputting external water into the liquid inlet.

The technical scheme of the utility model has the following remarkable beneficial effects:

the first driving elliptic gear and the second driving elliptic gear respectively drive the first driven elliptic gear and the second driven elliptic gear to rotate around respective centers at non-uniform speed, the first driven elliptic gear and the second driven elliptic gear further drive the first impeller and the second impeller to rotate around a first rotating center line at non-uniform speed, the first impeller and the second impeller divide the interior of the pump body into a plurality of independent accommodating cavities, and the first impeller and the second impeller always move relatively to enable the volume of the accommodating cavities to change periodically, so that fluid in the accommodating cavities can be pressurized, and the purpose of pressurizing the pump is achieved; and the pump body is divided into a plurality of accommodating cavities, the accommodating cavities can pressurize fluid, and in addition, in the process that the first impeller and the second impeller rotate for a circle, the same accommodating cavity can do work and pressurize to water flow for multiple times. Because the pump is more and can pressurizeing under equal rotational speed hold chamber quantity also more that the number of times is more, consequently, whole pump can be guaranteed its rotational speed of output pressure and the prerequisite of flow of pump and can reduce for other types of pump to can effectively reduce the noise.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not so limited in scope. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the utility model as a matter of case.

FIG. 1 is a schematic diagram of a pump in an embodiment of the utility model;

FIG. 2 is a schematic view of the pump according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating the variation of the relative relationship between the first driving elliptical gear and the first driven elliptical gear, the relative relationship between the second driving elliptical gear and the second driven elliptical gear, and the relative relationship between the first impeller and the second impeller under different rotation angles according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a cleaning device in an embodiment of the utility model.

Reference numerals of the above figures:

1. a motor; 2. a speed reduction mechanism; 3. a third axis; 4. a first driving elliptical gear; 5. a second driving elliptical gear; 6. a first shaft; 7. a first driven elliptical gear; 8. a second shaft; 9. a second driven elliptical gear; 10. a pump body; 101. a liquid inlet; 11. a first impeller; 12. a second impeller; 13. an accommodating chamber; 14. a bearing; 15. a sleeve; 100. a pump; 200. a nozzle mechanism; 300. a motor; 400. a water inlet end; 500. a grip portion; 600. a battery cell.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the utility model in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" 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 "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to effectively reduce noise while ensuring the output pressure and flow rate of the pump, the present application provides a pump, fig. 1 is a schematic diagram of a pump in an embodiment of the present invention, fig. 2 is a schematic structural diagram of a pump in an embodiment of the present invention, and as shown in fig. 1 and 2, the pump may include: the pump body 10 is provided with a liquid inlet 101 and a liquid outlet, and liquid enters the pump body 10 from the liquid inlet 101 and leaves the pump body 10 from the liquid outlet; a first impeller 11 provided in the pump body 10; the first gear set comprises a first driving elliptic gear 4 and a first driven elliptic gear 7, the first driving elliptic gear 4 drives the first driven elliptic gear 7 to rotate together, and the first driven elliptic gear 7 is connected with a first impeller 11 through a first shaft 6 and can drive the first impeller 11 to rotate together; a second impeller 12 provided in the pump body 10; the second gear set comprises a second driving elliptic gear 5 and a second driven elliptic gear 9, the second driving elliptic gear 5 drives the second driven elliptic gear 9 to rotate together, and the second driven elliptic gear 9 is connected with a second impeller 12 through a second shaft 8 and can drive the second impeller 12 to rotate together; the first impeller 11 and the second impeller 12 rotate around a first rotation center line together, and the rotation centers of the first driving elliptic gear 4 and the second driving elliptic gear 5 are superposed with the respective centers; the first impeller 11 and the second impeller 12 cooperate with the pump body 10 to define a plurality of accommodating cavities 13, and the accommodating cavities 13 are in fluid communication with the liquid inlet 101 and the liquid outlet.

In the application, a first driving elliptic gear 4 and a second driving elliptic gear 5 respectively drive a first driven elliptic gear 7 and a second driven elliptic gear 9 to rotate around respective centers at non-uniform speed, the first driven elliptic gear 7 and the second driven elliptic gear 9 further drive a first impeller 11 and a second impeller 12 to rotate around the same axis at non-uniform speed, the first impeller 11 and the second impeller 12 divide the interior of a pump body 10 into a plurality of independent accommodating cavities 13, and the first impeller 11 and the second impeller 12 move relatively to enable the volume of the accommodating cavities 13 to change periodically, so that fluid in the accommodating cavities 13 can be pressurized, and the purpose of pressurizing the pump is achieved; in addition, the pump body 10 is divided into a plurality of accommodating chambers 13, which can pressurize the fluid, and the same accommodating chamber 13 can apply work to pressurize the water flow for a plurality of times during the rotation of the first impeller 11 and the second impeller 12 for one circle. Because the pump is more and the chamber 13 that holds that can pressurize is also more in the number of pressurization number of times under equal rotational speed, consequently, whole pump can be guaranteed its rotational speed of output pressure and the prerequisite of flow of pump and can reduce for other types of pump to can effectively reduce the noise. Meanwhile, the movement of the first impeller 11 and the second impeller 12 can drive the liquid in the whole chamber to move, so that the liquid is pressurized, and the volume utilization rate of the pump is high. It should be noted that two impellers are provided as a preferred embodiment of the present invention, and three or more impellers may be provided in other embodiments.

In order to better understand the pump of the present application, it will be further explained and illustrated below. As shown in fig. 1 and 2, the pump may include: the pump comprises a first gear set comprising a first driving elliptic gear 4 and a first driven elliptic gear 7, a second gear set comprising a second driving elliptic gear 5 and a second driven elliptic gear 9, a first shaft 6, a second shaft 8, a pump body 10, a first impeller 11 and a second impeller 12.

As shown in fig. 1, a motor 1 is used as an output source of power for driving a first driving elliptic gear 4 and a second driving elliptic gear 5 to rotate. The first driving elliptic gear 4 is in transmission connection with the motor 1, and the first driving elliptic gear 4 rotates around the center of the first driving elliptic gear. Similarly, the second driving elliptic gear 5 is in transmission connection with the motor 1, and the second driving elliptic gear 5 rotates around the center thereof. The rotation speeds of the first driving elliptic gear 4 and the second driving elliptic gear 5 need to be the same, so the transmission ratio between the first driving elliptic gear 4 and the motor 1 and the transmission ratio between the second driving elliptic gear 5 and the motor 1 are the same.

Since the rotation speed of the motor 1 is high, in general, in order to reduce the rotation speed of the first driving elliptic gear 4 and the second driving elliptic gear 5, the motor 1, the first driving elliptic gear 4 and the second driving elliptic gear 5 can be in transmission connection through the speed reducing mechanism 2.

In one possible embodiment, as shown in fig. 1 and 2, the pump may include: and the third shaft 3 is in transmission connection with the motor 1, and the first driving elliptic gear 4 and the second driving elliptic gear 5 are fixedly arranged on the third shaft 3. The third shaft 3 is connected with a rotating shaft of the motor 1 through a speed reducing mechanism 2. In order to make the first driving elliptic gear 4 and the second driving elliptic gear 5 respectively rotate around the respective centers, the first driving elliptic gear 4 and the second driving elliptic gear 5 are installed on the third shaft 3, and the third shaft 3 passes through the central positions of the first driving elliptic gear 4 and the second driving elliptic gear 5. The first driving elliptic gear 4 and the second driving elliptic gear 5 rotate around the second rotation center line together, that is, the rotation centers of the first driving elliptic gear 4 and the second driving elliptic gear 5 coincide with the respective centers.

In another possible embodiment, the pump may include: the first driving elliptic gear 4 is fixedly arranged on the third shaft 3, and the second driving elliptic gear 5 is fixedly arranged on the fourth shaft. The third shaft 3 is connected with the rotating shaft of the motor 1 through the speed reducing mechanism 2, and the fourth shaft is connected with the rotating shaft of the motor 1 through the speed reducing mechanism 2. The reduction mechanism 2 may be such that the rotational speeds of the third shaft 3 and the fourth shaft are the same. Similarly, the third shaft 3 passes through the center position of the first driving elliptic gear 4, and the fourth shaft passes through the center position of the second driving elliptic gear 5.

In the various embodiments described above, the reduction mechanism 2 may be a reduction gear mechanism or the like.

As shown in fig. 1 and 2, the first driven elliptic gear 7 is provided on the first shaft 6, and the first shaft 6 is inserted through the center of the first driven elliptic gear 7 so that the first driven elliptic gear 7 rotates around the center thereof. The first driven elliptic gear 7 is the same as and meshed with the first driving elliptic gear 4, so that the first driving elliptic gear 4 drives the first driven elliptic gear 7 to rotate together. The second driven elliptic gear 9 is arranged on the second shaft 8, and the second shaft 8 penetrates through the center of the second driven elliptic gear 9, so that the second driven elliptic gear 9 rotates around the center. The second driven elliptic gear 9 is the same as and meshed with the second driving elliptic gear 5, so that the second driving elliptic gear 5 drives the second driven elliptic gear 9 to rotate together. Specifically, the end of the major axis of the first driven elliptic gear 7 can mesh with the end of the minor axis of the first driving elliptic gear 4; the end of the major axis of the second driven elliptical gear 9 can mesh with the end of the minor axis of the second driving elliptical gear 5. Through the structure, in the process that the first driving elliptic gear 4 drives the first driven elliptic gear 7 to rotate, the distance between the center of the first driving elliptic gear 4 and the center of the first driven elliptic gear 7 is constant; similarly, in the process that the second driving elliptic gear 5 drives the second driven elliptic gear 9 to rotate, the distance between the center of the second driving elliptic gear 5 and the center of the second driven elliptic gear 9 is constant, so that the third shaft 3, the first shaft 6 and the second shaft 8 can be conveniently arranged and installed, and the first driven elliptic gear 7 and the second driven elliptic gear 9 rotate around the first rotation center line together. Furthermore, the first rotation center line is parallel to the second rotation center line, so that the first gear set and the second gear set do not additionally occupy the space in the radial direction of the interior of the pump, the radial dimension of the pump body is smaller, and the structure is more compact.

In the embodiment in which the first driving elliptic gear 4 and the second driving elliptic gear 5 are fixedly mounted on the third shaft 3, in order to make the first driven elliptic gear 7 identical to and meshed with the first driving elliptic gear 4 and the second driven elliptic gear 9 identical to and meshed with the second driving elliptic gear 5, the length of the major axis of the first driven elliptic gear 7 plus the length of the minor axis of the first driving elliptic gear 4 needs to be equal to the length of the major axis of the second driven elliptic gear 9 plus the length of the minor axis of the second driving elliptic gear 5. Preferably, the first driving elliptic gear 4 and the second driving elliptic gear 5 may be identical.

First initiative elliptic gear 4, second initiative elliptic gear 5, first driven elliptic gear 7 and second driven elliptic gear 9 in this application all rotate along respective center, therefore, their focus etc. can all be on the axle of installing separately, can realize elliptic gear's high-speed rotation like this, the phenomenon of buckling can not appear in the axle yet, the noise that sends during gear revolve is also less. In addition, the elliptic gears adopted in the application all rotate under the fixed shaft, and the reciprocating motion of the plunger pump does not exist, so the generated noise is relatively small.

As shown in fig. 2, the pump body 10 has a liquid inlet 101 and a liquid outlet (not shown). A first impeller 11 and a second impeller 12 are provided in the pump body 10. The middle parts of the first impeller 11 and the second impeller 12 are arranged in a roughly crossed mode, the first impeller 11 and the second impeller 12 can rotate around the same axis, and relative rotation can be generated between the first impeller 11 and the second impeller 12. The first impeller 11 is in driving connection with the first shaft 6 and the second impeller 12 is in driving connection with the second shaft 8. The axis of the first shaft 6 and the axis of the second shaft 8 are located on the same straight line, and therefore, the first impeller 11 and the second impeller 12 rotate together about the first rotation center line. As an alternative, the first impeller 11 is fixedly mounted on the first shaft 6 and the second impeller 12 is fixedly mounted on the second shaft 8. As a matter of course, the first impeller 11 and the first shaft 6 may be integrally formed, and the second impeller 12 and the second shaft 8 may also be integrally formed. As shown in fig. 2, the first driving elliptic gear 4, the second driving elliptic gear 5 and the third shaft 3 may be installed in the pump body 10, and the first driven elliptic gear 7, the second driven elliptic gear 9, the first shaft 6 and the second shaft 8 may be installed in the pump body 10. The third shaft 3 is arranged in parallel with the first shaft 6 and the second shaft 8. At least two positions of the third shaft 3 are fixedly mounted with the pump body 10 through bearings 14, and at least two positions of the first shaft 6 are fixedly mounted with the pump body 10 through bearings 14, generally two ends of the first shaft 6. At least two positions of the second shaft 8 are fixedly arranged with the pump body 10 through bearings 14, so that the positions of the first shaft 6, the second shaft 8 and the third shaft 3 are limited, and the first shaft, the second shaft and the third shaft can only rotate. A sleeve 15 may be arranged between the bearings 14 at the second shaft 8 to achieve positioning and maintaining a certain distance between the two bearings 14. It is to be noted that in the preferred embodiment, the first impeller 11 and the second impeller 12 are identical.

Fig. 3 is a schematic diagram illustrating a relative relationship between the first driving elliptic gear 4 and the first driven elliptic gear 7, a relative relationship between the second driving elliptic gear 5 and the second driven elliptic gear 9, and a change in a relative relationship between the first impeller 11 and the second impeller 12 under different rotation angles in the embodiment of the present invention, as shown in fig. 1 to 3, the first impeller 11 and the second impeller 12 divide the interior of the pump body 10 into a plurality of independent accommodating cavities 13, and when the first impeller 11 and the second impeller 12 rotate, positions of the accommodating cavities 13 formed are changed, so that the accommodating cavities 13 can be respectively communicated with the liquid inlet 101 and the liquid outlet. Since the first impeller 11 and the second impeller 12 always rotate at non-uniform speed, the first impeller 11 and the second impeller 12 can generate relative motion, and the volume of the accommodating cavity 13 is changed to pressurize the fluid in the accommodating cavity 13.

In order to change the volume of the accommodating cavity 13, an included angle which is not equal to zero is formed between the long axis of the first driving elliptic gear 4 and the long axis of the second driving elliptic gear 5. Preferably, as shown in fig. 3, the major axis of the first driving elliptic gear 4 is perpendicular to the major axis of the second driving elliptic gear 5, and in this embodiment, the speed difference between the first driven elliptic gear 7 and the second driven elliptic gear 9 is large, and the amplitude of the relative motion is also large, so that the degree of change in the volume of the accommodating chamber 13 is maximized, and thus the fluid in the accommodating chamber 13 can be pressurized to the maximum degree.

As shown in fig. 1 and 2, in order to enable the first impeller 11 and the second impeller 12 to rotate around the same axis, it is feasible that the second shaft 8 is sleeved outside the first shaft 6, that is, the first shaft 6 is inserted into the second shaft 8, so that the first shaft 6 and the second shaft 8 rotate around the first rotation center line, and relative rotation can be generated between the two. The first impeller 11 is fixedly mounted on the first shaft 6 in an area not covered by the second shaft 8, and the first driven elliptic gear 7 is fixedly mounted on the first shaft 6 in an area not covered by the second shaft 8.

In an exemplary embodiment, the major axis of the first drive elliptical gear 4 is perpendicular to the major axis of the second drive elliptical gear 5, as shown in FIG. 3. When the motor 1 drives the first driving elliptic gear 4 and the second driving elliptic gear 5 to rotate, the first driving elliptic gear 4 and the second driving elliptic gear 5 rotate at the same rotating speed. When the included angle between the major axis of the first driving elliptic gear 4 and the vertical direction is 0 degree, the end of the major axis of the first driven elliptic gear 7 is meshed with the end of the minor axis of the first driving elliptic gear 4, the end of the minor axis of the second driven elliptic gear 9 is meshed with the end of the major axis of the second driving elliptic gear 5, at the moment, the first impeller 11 is perpendicular to the second impeller 12, and the volumes of the four accommodating cavities 13 are the same. Along with the same-angle 90-degree rotation of the first driving elliptic gear 4 and the second driving elliptic gear 5, the first driven elliptic gear 7 driven by the first driving elliptic gear 4 rotates at a non-uniform speed, and the second driven elliptic gear 9 driven by the second driving elliptic gear 5 rotates at a non-uniform speed, so that at the same moment, the long axes of the first driven elliptic gear 7 and the second driven elliptic gear 9 are not collinear, correspondingly, the first impeller 11 and the second impeller 12 are not superposed, and therefore the first impeller 11 and the second impeller 12 always perform relative motion, so that the volumes of the accommodating cavity 13A and the accommodating cavity 13C at the relative positions are increased firstly and then reduced to the original size, and the volumes of the accommodating cavity 13B and the accommodating cavity 13D at the relative positions are decreased firstly and then increased to the original size.

If the first driving elliptic gear 4 and the second driving elliptic gear 5 rotate 360 degrees at the same angle, the first driven elliptic gear 7 and the second driven elliptic gear 9 respectively rotate 360 degrees, and in the whole process, the volumes of the accommodating cavity 13A and the accommodating cavity 13C at the opposite positions are firstly increased to the maximum, then reduced to the minimum, then increased to the maximum, then reduced to the minimum and then increased to the initial volume. The volume of one accommodating cavity 13 is increased by two processes, and the purpose of water inlet of the accommodating cavity 13 is achieved through the liquid inlet 101 in the process; the volume of one accommodating cavity 13 is reduced in two processes, and water pressurized by work is discharged through a liquid outlet in the processes. Therefore, as a practical matter, since the first impeller 11 and the second impeller 12 divide the interior of the pump body 10 into four independent accommodating cavities 13, the number of the liquid inlets 101 may be two, and the number of the liquid outlets may be two, and the two liquid inlets 101 and the two liquid outlets are sequentially arranged adjacently and are circumferentially distributed around the first rotation center line. Preferably, the two liquid inlets 101 are symmetrically arranged, and the two liquid outlets are symmetrically arranged. In addition, the two liquid inlets 101 and the two liquid outlets may be uniformly circumferentially distributed around the first rotation center line. In the above manner, taking the same accommodating cavity 13 as an example, the accommodating cavity is communicated with the liquid inlet 101 in the process of volume increase, so that external water flows into the accommodating cavity; then the accommodating cavity 13 rotates a certain angle to reduce the volume and is communicated with the liquid outlet in the process of reducing the volume so as to discharge the water pressurized by applying work; then, the accommodating cavity 13 rotates a certain angle again to increase the volume, and the accommodating cavity is communicated with another liquid inlet 101 in the process of increasing the volume so as to enable external water to flow into the accommodating cavity 13; finally, the accommodating cavity 13 rotates a certain angle to reduce the volume and is communicated with another liquid outlet in the volume reduction process so as to discharge the water pressurized by applying work.

In the above process, i.e. during one rotation of the first impeller 11 and the second impeller 12, one housing chamber 13 can perform work pressurization on the water flow twice. Because the pump is more in the number of times of pressurizeing under the same rotational speed, consequently, its rotational speed can reduce for other types of pump under the prerequisite of the output pressure and the flow of assurance pump to can effectively reduce the noise. Since the first impeller 11 and the second impeller 12 divide the interior of the pump body 10 into 4 independent accommodating chambers 13, that is, in terms of the whole pump, the 4 independent accommodating chambers 13 can perform work pressurization on water flow for 4 times in total during one rotation of the first impeller 11 and the second impeller 12. That is to say, the number of the accommodating cavities 13 pressurized by the pump at the same rotating speed is also large, so that the rotating speed of the whole pump can be reduced relative to other types of pumps on the premise of ensuring the output pressure and the flow of the pump, and the noise can be effectively reduced.

The pump in this application only needs two sets of gear trains, and four oval gears altogether just can realize the uneven speed of first impeller and second impeller and rotate, and oval gear that whole device used is small in quantity, simple structure. In addition, four elliptic gears are respectively arranged at the positions of two rotating shafts of the second rotating center line and the first rotating center line, and only two parallel rotating shafts are needed in the vertical direction, so that the length of the pump in the vertical direction can be greatly reduced, and the volume of the whole pump is optimized.

In this application, a cleaning device is also proposed, fig. 4 is a schematic structural diagram of a cleaning device in an embodiment of the present invention, and as shown in fig. 4, the cleaning device includes a pump 100 as described in any one of the above; the motor 300 is in transmission connection with the third shaft 3, the motor 300 is used for providing rotating power for the pump 100, and the motor 300 can drive the first driving elliptic gear 4 and the second driving elliptic gear 5 to rotate; a spray head mechanism 200 capable of communicating with the outlet of the pump 100 to spray water pressurized by the pump; a water inlet end 400 capable of being communicated with the liquid inlet 101, wherein the water inlet end 400 is used for inputting external water into the liquid inlet 101; a grip 500 for holding a user to operate the washing apparatus. As a possibility, the washing device may further comprise a battery unit 600, the battery unit 600 being used for powering the motor 300. The user can hold the holding part 500 to operate the cleaning device, water from an external water source is input into the pump 100 through the water inlet end 400 of the cleaning device, the pump 100 pressurizes the input water and outputs the pressurized water, and the pressurized water after output is sprayed out through the spray head mechanism 200 to perform cleaning operation. The cleaning device can be powered by the detachably connected battery unit 600, and can also be powered by connecting a power line with a power supply.

Further, in a preferred embodiment of the present invention, the rotation speed of the first impeller 11 and the second impeller 12 is in a range of 50 to 5000 rpm, so that the cleaning apparatus can perform both high-speed cleaning operation and liquid transfer operation, and the application range is wider.

The cleaning device may be a high-pressure cleaning machine that pressurizes and injects water. Of course, the pump of the present application may also be used in devices requiring fluid pressurization, such as hydraulic wrenches, hydraulic pumps, and the like.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The above embodiments are only a few embodiments of the present invention, and the embodiments of the present invention are described above, but the present invention is only used for the understanding of the present invention, and is not limited to the embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. A pump, comprising:

the pump body is provided with a liquid inlet and a liquid outlet, and liquid enters the pump body from the liquid inlet and leaves the pump body from the liquid outlet;

the first impeller is arranged in the pump body;

the first driving elliptic gear drives the first driven elliptic gear to rotate together, and the first driven elliptic gear is connected with the first impeller through a first shaft and can drive the first impeller to rotate together;

the second impeller is arranged in the pump body;

the second gear set comprises a second driving elliptic gear and a second driven elliptic gear, the second driving elliptic gear drives the second driven elliptic gear to rotate together, and the second driven elliptic gear is connected with the second impeller through a second shaft and can drive the second impeller to rotate together;

the first impeller and the second impeller rotate around a first rotation center line together, and the rotation centers of the first driving elliptic gear and the second driving elliptic gear are superposed with the respective centers; the first impeller, the second impeller and the pump body cooperate to define a plurality of accommodating cavities, the accommodating cavities can be in fluid communication with the liquid inlet and the liquid outlet, and the first impeller and the second impeller move relatively to change the volume of the accommodating cavities so as to pressurize the liquid in the accommodating cavities.

2. The pump of claim 1, wherein the major axis of the first drive elliptical gear and the major axis of the second drive elliptical gear have an included angle therebetween that is not equal to zero.

3. The pump of claim 2, wherein a major axis of the first drive elliptical gear is perpendicular to a major axis of the second drive elliptical gear.

4. The pump of claim 1, wherein said first driven elliptical gear and said second driven elliptical gear collectively rotate about said first centerline of rotation.

5. The pump of claim 1, wherein the first shaft is disposed through the second shaft, the first shaft and the second shaft rotating about the first centerline of rotation.

6. The pump of claim 1, wherein the first and second drive elliptical gears collectively rotate about a second rotational centerline, and the first rotational centerline is parallel to the second rotational centerline.

7. The pump of claim 1, wherein an end of the major axis of the first driven elliptical gear is engageable with an end of the minor axis of the first driving elliptical gear; the end part of the long shaft of the second driven elliptic gear can be meshed with the end part of the short shaft of the second driving elliptic gear.

8. The pump of claim 7 wherein the length of the major axis of the first driven elliptical gear plus the length of the minor axis of the first driving elliptical gear is equal to the length of the major axis of the second driven elliptical gear plus the length of the minor axis of the second driving elliptical gear.

9. The pump of claim 1, wherein the first impeller and the second impeller rotate at a speed in the range of 50-5000 rpm.

10. A cleaning device comprising the pump of any one of claims 1 to 9, further comprising a motor that drives the first drive elliptical gear and the second drive elliptical gear in rotation; the spray head mechanism is communicated with the liquid outlet of the pump and is used for spraying the water pressurized by the pump; the water inlet end can be communicated with the liquid inlet and is used for inputting external water into the liquid inlet.

Images