CN216460402U

CN216460402U - Hand-held pressure cleaning machine

Info

Publication number: CN216460402U
Application number: CN202122501065.2U
Authority: CN
Inventors: 储小爱
Original assignee: Suzhou Haisheng New Energy Technology Co ltd
Current assignee: Suzhou Haisheng New Energy Technology Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-05-10
Anticipated expiration: 2031-10-18

Abstract

The utility model discloses a hand-held pressure cleaning machine, comprising: the shell comprises a handle for holding, a main body part arranged at an angle with the handle and a water outlet part for spraying water outwards; the water pumping assembly comprises a water pump arranged in the main body part and a motor used for driving the water pump; the battery pack is connected with the shell and used for supplying power to the motor; the water pump includes the pump body and sets up in a plurality of pump covers of pump body circumference, and the quantity of pump cover is four, all forms a pressurization chamber in every pump cover, and the water pump is still including the pump core that is used for compressing and the pressurization chamber of managing to find time, and at a pump water cycle of water pump, four pressurization chambers are compressed in proper order to the pump core. The handheld pressure cleaning machine provided by the utility model has the advantages of stable water outlet pressure and small pulsation.

Description

Hand-held pressure cleaning machine

Technical Field

The utility model belongs to the technical field of cleaning equipment, and particularly relates to a handheld pressure cleaning machine.

Background

With the improvement of life quality of people, the requirement on the cleanness of living environment is higher and higher. In order to facilitate cleaning work of people at any time and any place, a handheld pressure cleaning machine appears on the market recently, the handheld pressure cleaning machine adopts a battery pack to supply power, and a water pumping structure is integrated in a handheld spray gun shell, so that the handheld pressure cleaning machine is very portable and can be used in places with water sources, and the outdoor cleaning is greatly facilitated.

However, in order to satisfy the requirement of portability, the water pump of the existing hand-held pressure washer is miniaturized, and the size and the weight are greatly reduced. In a water pumping period, only one or two times of work is done, so that the sprayed water pressure is unstable and has large pulsation in a single circulation period.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to provide the handheld pressure cleaning machine with stable water pressure and high water pumping efficiency.

In order to solve the above technical problem, the present invention provides a hand-held pressure washer, comprising:

a hand-held pressure washer comprising:

the shell comprises a handle for holding, a main body part arranged at an angle with the handle and a water outlet part for spraying water outwards;

the water pumping assembly comprises a water pump arranged in the main body part and a motor used for driving the water pump;

the battery pack is connected to the shell and used for supplying power to the motor;

the water pump includes the pump body and set up in a plurality of pump covers of pump body circumference, the quantity of pump cover is four, every all form a pressurization chamber in the pump cover, the water pump is still including being used for compressing and managing empty the pump core in pressurization chamber a pump water cycle of water pump, four are compressed in proper order to the pump core pressurization chamber.

In one embodiment, two of the pump covers are arranged symmetrically at 180 degrees, and the other two pump covers are arranged symmetrically at 180 degrees.

In one embodiment, the four pump covers are uniformly distributed along the circumferential direction of the pump body, and the included angle between every two adjacent pump covers is 90 degrees.

In one embodiment, the pump core comprises two plungers, each plunger comprises two opposite free ends, the two free ends of one plunger respectively extend into the pressurizing cavities of two opposite pump covers, and the two free ends of the other plunger respectively extend into the pressurizing cavities of the other two pump covers; the pump core further comprises an eccentric mechanism for driving the plungers to reciprocate, and a connecting part for connecting the eccentric mechanism is arranged in the middle of each plunger.

In one embodiment, at least one of the plungers includes a connecting structure disposed separately from the two free ends, the connecting structure being connected between the two free ends to cause the free ends to reciprocate synchronously.

In one embodiment, the connecting structure is provided with a guide structure, the water pump further comprises a guide pillar, one end of the guide pillar is fixed on the pump body, and the free end of the guide pillar is in limit fit with the guide structure and used for limiting the linear reciprocating motion of the connecting structure.

In one embodiment, the eccentric mechanism comprises an eccentric shaft and a rolling bearing sleeved on the eccentric shaft, and the rolling bearing is simultaneously positioned in the connecting part of the two plungers and used for driving the two plungers to do linear reciprocating motion.

In one embodiment, the rolling bearing is a needle bearing.

In one embodiment, the geometric centers of the four pressurized chambers are substantially located in the same plane, which is perpendicular to the longitudinal extension direction of the main body.

In one embodiment, the electric vehicle further comprises a control switch, wherein the control switch is arranged on the shell and used for controlling connection and disconnection of the battery pack and the motor.

The technical scheme provided by the utility model has the following advantages:

according to the handheld pressure cleaning machine provided by the utility model, the water pump comprises the four pump covers which are circumferentially arranged, the pressurizing cavity is formed in each pump cover, and the pump core sequentially compresses the four pressurizing cavities to do four times of work in one water pumping period of the water pump, so that the stability of the water pressure sprayed by the water pump is improved, the water pressure pulsation is reduced, and the cleaning efficiency is improved. Meanwhile, the pump cover is arranged in the circumferential direction of the pump body, the axial size of the pump body cannot be increased, and the miniaturization of the axial size of the handheld pressure cleaning machine is guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a simple structure of a hand-held pressure washer provided in embodiment 1 of the present invention;

FIG. 2 is a schematic perspective view of a water pumping assembly of the hand-held pressure washer of FIG. 1;

FIG. 3 is a schematic longitudinal sectional view of the water pumping assembly shown in FIG. 2;

FIG. 4 is a cross-sectional schematic view of the water pumping assembly shown in FIG. 2;

fig. 5 is a schematic perspective view of a pump core of a water pump according to an embodiment.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. The utility model will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

Example 1

The present embodiment provides a hand-held pressure washer. As shown in fig. 1 to 2, the hand-held pressure washer includes a housing, a water pumping assembly 2, and a battery pack 9. The housing is substantially pistol-shaped and includes a grip 12 for gripping, a main body 11 disposed at an angle to the grip 12, and a water outlet portion for discharging water to the outside. The water outlet part is connected to the front end (water outlet end) of the main body part 11, the handle 12 is connected to the lower portion of the rear end of the main body part 11, and the axis of the handle 12 and the longitudinal extension direction of the main body part 11 are arranged at an angle, so that the whole shell is in a handheld gun shape.

The water pump assembly is for pressurizing water, and includes a water pump 21 provided in the main body 11 and a motor 24 for driving the water pump 21. Specifically, the main body 11 is provided with a water inlet 10 and a water outlet 18, the water inlet 10 is suitable for being connected with a water pipe to communicate with an external water source, the water outlet 18 is used for being connected with a water outlet part, and pressurized water is finally sprayed out from the water outlet part through the water outlet 18. In the present embodiment, the water outlet portion includes a spray bar 16 and a nozzle 17 provided at the distal end of the spray bar 16. Specifically, spray bar 16 is removably attached to body portion 11 to facilitate replacement of spray bars of different lengths. The nozzle 17 is detachably connected with the spray rod 16, so that the nozzle with different water types can be conveniently replaced. The arrows in fig. 1 show the flow path of the external water source entering from the water inlet 10 and then exiting from the water outlet portion.

The battery pack 9 is used for providing electric energy for the motor 24, is arranged on the shell and is electrically connected with the motor 24. Specifically, the battery pack 9 is connected to the end of the handle 12, specifically, the end away from the main body 11. In this embodiment, the battery pack 9 is detachably provided. Therefore, under the condition that the electric quantity of the current battery pack 9 is used up, a new battery pack can be replaced to continuously supply power to the motor, and continuous cleaning work of the handheld pressure cleaning machine is guaranteed.

Referring to fig. 2 and 4, the water pump 21 includes a pump body 210 and a plurality of pump covers 211, 213, 214, 216 disposed on the circumference of the pump body 210, the number of the pump covers is four, each pump cover forms a pressurizing cavity therein, the water pump 21 further includes a pump core for compressing and evacuating the pressurizing cavities, and the pump core sequentially compresses and evacuates the four pressurizing cavities in one pumping cycle of the water pump. Wherein, the water pumping period refers to one cycle period of the water pump. The pressurizing process of one pressurizing cavity is recorded as one work, so that the water pump performs four compression processes to do four work in one water pumping period of the water pump. The phase angle difference of the two adjacent working operations is small, the pulsation of the sprayed water pressure is reduced, and the stability of the water pressure is improved.

In one embodiment, pump cover 211 and pump cover 213 are disposed 180 degrees symmetrical about pump body 210, and pump cover 214 and pump cover 216 are also disposed 180 degrees symmetrical about pump body 210. That is, two of them pump cover are 180 degrees symmetry setting, and wherein two other pump cover are 180 degrees symmetry setting. So, the compression process phase difference 180 degrees of two pump covers that the symmetry set up is favorable to guaranteeing that the water pressure of going out is steady. Furthermore, the four pump covers are uniformly distributed along the circumferential direction of the pump body, and the included angle between every two adjacent pump covers is 90 degrees.

In one embodiment, referring to fig. 4 and 5, the pump cartridge includes two

plungers

212 and 215, the plunger 212 including two opposing

free ends

212a and 212b, and the plunger 215 including two opposing

free ends

215a and 215 b. The free ends 212a and 212b of the plunger 212 extend into the pressurization chambers of the pump caps 211 and 213, respectively, and the free ends 215a and 215b of the plunger 215 extend into the pressurization chambers of the pump caps 214 and 216, respectively, for compression and evacuation of the pressurization chambers within each pump cap, respectively. A connecting portion is provided at the middle of the

plungers

212 and 215. The pump cartridge further includes an eccentric mechanism 280 for driving the

plungers

212 and 215 to reciprocate, the eccentric mechanism 280 being connected to the connecting portions of the

plungers

212 and 215 for driving the

plungers

212 and 215 to reciprocate linearly for alternately compressing and evacuating the four pressurizing chambers.

Please refer to fig. 3. The eccentric mechanism 280 comprises a driving rotating shaft 2181 and a rolling bearing 2180 sleeved on the driving rotating shaft 2181, wherein the rolling bearing 2180 is simultaneously positioned in the connecting parts of the two

plungers

212 and 215 and can simultaneously drive the two

plungers

212 and 215 to do linear reciprocating motion. In this embodiment, the axes of the plunger 212 and the plunger 215 are substantially coplanar, the coupling portions are substantially inwardly recessed cavities, the coupling portions of the plunger 212 and the plunger 215 are nested such that the two cavities are substantially spatially coincident, and the rolling bearing 2180 is capable of driving the free ends 212a, 215b, 212b, 215a in sequence for one revolution. Specifically, the driving shaft 2181 includes an eccentric shaft portion 2181a, and the rolling bearing 2180 is disposed on the eccentric shaft portion 2181 a. More specifically, the rolling bearing 2180 is a needle bearing.

In one embodiment, the plunger 212 includes a connecting structure 212c disposed separately from the two

free ends

212a and 212b, the connecting structure being connected between the two

free ends

212a, 212b for connecting the two

free ends

212a and 212b together to enable the two free ends to reciprocate synchronously. Specifically, the connecting structure 212c is located on the outside of the connecting portion of the plunger 215, specifically, on the side away from the eccentric mechanism 280. The plunger 212 is of a split structure, and when the plunger 212 is installed, the two

free ends

212a and 212b are inserted into the pump body, and then the two free ends are fixedly connected through the connecting structure 212c, so that the installation of the plunger 212 can be simplified.

In order to ensure the coaxiality of the reciprocating motion of the plunger 212, the vibration and noise increase of the water pump caused by the inconsistency of the coaxiality are reduced. The connecting structure 212c is provided with a guiding structure 2120, the water pump 21 further comprises a guide post 217 with one end fixed on the pump body 210, and the free end of the guide post 217 is in limit fit with the guiding structure 2120 for limiting the linear reciprocating motion of the connecting structure 212 c. Specifically, the guide structure 2120 is configured as a guide hole opened on the connecting structure 212c, the guide hole is roughly in a track shape, and both ends are in a circular shape matching the guide post 217. In this embodiment, the plunger 215 also includes a connecting structure 215c that is separate from the two

free ends

215a and 215b, the connecting structure 215c being closer to the eccentric mechanism, although the plunger 215 may be a one-piece structure. In this embodiment, only the connecting structure 212c is provided with the guide structure, and the plunger 215 is not provided with the guide structure.

The pump body 210 includes a first pump body 210a and a second pump body 210 b. The first pump body 210a is used for accommodating the

plungers

212 and 215, a water inlet channel and a water outlet channel are formed in the second pump body 210b, a water inlet check valve is arranged in the water inlet channel, a water outlet check valve is arranged in the water outlet channel, the second pump body 210b is fixedly installed with the first pump body 210a, and pump covers are arranged on the circumferential directions of the first pump body 210a and the second pump body 210b in a sealing mode. Specifically, the guide post 217 is fixedly mounted on the second pump body 210 b.

In order to reduce the effect of the water pump on the increase of the volume of the pressure washer. In one embodiment, the geometric centers of the four pressure chambers are substantially located in the same plane, and the plane is perpendicular to the longitudinal extension direction of the main body 11, i.e., the increase in the number of pressure chambers does not increase the axial length of the water pump 21, and therefore, the axial length of the main body 11.

The hand-held pressure washer further comprises a control switch 13 arranged on the housing for controlling the connection and disconnection of the battery pack 9 and the motor 24. Specifically, the control switch 13 is disposed on the handle 12, so that the same hand can operate the control switch 13 when the handle 12 is held. Of course, the control switch 13 may be provided on the main body 11, and is not limited thereto.

In one embodiment, the water pumping assembly further comprises a speed reducing mechanism 23. Specifically, the speed reducing mechanism 23 is disposed between the motor 24 and the water pump 21, and is configured to reduce the speed of the rotation of the motor 24 and transmit the rotation to the water pump 21. More specifically, the speed reduction mechanism 23 is a planetary gear speed reduction mechanism.

The water pump 21 further includes a pump head 219, one end of the pump head 219 is communicated with the water outlet channel of the second pump body 210b, and the other end of the pump head 219 is communicated with the water outlet portion.

The pressure washer that this embodiment provided, four pump covers that the water pump includes circumference and sets up all form one in every pump cover and add the pressure chamber, and in a pump cycle of water pump, four pressure chambers of pump core compression in proper order do the quartic merit, have improved the hydraulic stability of water pump blowout, have reduced water pressure pulsation, have improved clean efficiency. Meanwhile, the pump cover is arranged in the circumferential direction of the pump body, the axial size of the pump body cannot be increased, and the miniaturization of the axial size of the handheld pressure cleaning machine is guaranteed.

Example 2

The handheld pressure washer provided by the present embodiment has the same structure as that of embodiment 1, and the difference is only the structure of the pump core, and only the different structures are described below, and the same structures are given the same reference numerals and are not repeated.

In this embodiment, the pump core includes a piston, a crankshaft, and a connecting rod connected between the crankshaft and the piston. The quantity of piston is four, sets up with the pump cover one-to-one respectively, and the drive end of piston sets up relatively, and all is connected with the one end of connecting rod, and bent axle and connecting rod drive piston compression and the pressurization chamber of managing to find time. Specifically, a crankshaft is coupled to power, and a connecting rod is used to convert the rotation of the crankshaft into reciprocating motion of the piston.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. Based on the embodiments of the present invention, those skilled in the art may make other variations or modifications without creative efforts, and shall fall within the protection scope of the present invention.

Claims

1. A hand-held pressure washer, comprising:

2. The hand-held pressure washer according to claim 1, wherein two of said pump caps are 180 degrees symmetrically disposed and wherein the other two of said pump caps are 180 degrees symmetrically disposed.

3. The hand-held pressure washer according to claim 2, wherein four pump caps are evenly distributed along the circumference of the pump body, and the included angle between adjacent pump caps is 90 degrees.

4. The hand-held pressure washer according to claim 2 or 3, wherein the pump cartridge comprises two plungers, each plunger comprising two opposite free ends, wherein the two free ends of one plunger extend into the pressurizing chambers of the two opposite pump caps, respectively, and wherein the two free ends of the other plunger extend into the pressurizing chambers of the other two pump caps, respectively; the pump core further comprises an eccentric mechanism for driving the plungers to reciprocate, and a connecting part for connecting the eccentric mechanism is arranged in the middle of each plunger.

5. The hand-held pressure washer according to claim 4, wherein at least one of the plungers includes a connecting structure disposed separately from both of said free ends, said connecting structure being connected between both of said free ends to cause said free ends to reciprocate synchronously.

6. The hand-held pressure washer according to claim 5, wherein a guide structure is provided on the connecting structure, the water pump further comprises a guide post having one end fixed to the pump body, and a free end of the guide post is in limit fit with the guide structure for limiting the linear reciprocating motion of the connecting structure.

7. The hand-held pressure washer according to claim 4, wherein said eccentric mechanism comprises an eccentric shaft and a rolling bearing fitted around said eccentric shaft, said rolling bearing being simultaneously located in said connecting portion of said two plungers for driving said two plungers to linearly reciprocate.

8. The hand-held pressure washer according to claim 7, wherein said rolling bearing is a needle bearing.

9. The hand-held pressure washer according to claim 1, wherein the geometric centers of the four pressurizing chambers are located substantially in the same plane, said plane being perpendicular to the lengthwise extension of the main body portion.

10. The hand-held pressure washer according to claim 1, further comprising a control switch disposed on the housing for controlling connection and disconnection of the battery pack to the motor.