CN108730153B - Single-plunger type plunger pump and handheld cleaning machine - Google Patents

Abstract

A single-plunger pump is used for a handheld cleaning machine and comprises a plunger, a pump cover, a water outlet passage formed in the pump cover, a pump body, a crank connecting rod mechanism driving the plunger to move and a motor driving the crank connecting rod mechanism to move, wherein the pump cover is positioned on the front side of the pump body, a water outlet pipe is arranged on the pump cover, the plunger and the water outlet pipe respectively extend in the front-back direction, the water outlet passage penetrates through the water outlet pipe, the plunger is positioned on the back side of the pump body, the front end of the plunger extends forwards into the pump body and can move in the pump body to pressurize water in the pump body, the pressurized water flows out of the pump cover through the water outlet passage, the crank connecting rod mechanism is positioned on the back side of the back end of the plunger, and the back end of the plunger is positioned outside the pump body and is. So design, pump cover, the pump body, plunger, crank link mechanism distribute in proper order from the front to back, and outlet pipe, plunger also extend along the fore-and-aft direction, and the plunger pump is elongated more on the whole for this single plunger type plunger pump's overall framework is more adapted in hand-held type cleaning machine, is favorable to affiliated hand-held type cleaning machine miniaturization.

Description

Single-plunger type plunger pump and handheld cleaning machine

[ technical field ] A method for producing a semiconductor device

The invention relates to a single-plunger type plunger pump and a cleaning machine adopting the single-plunger type plunger pump.

[ background of the invention ]

The cleaning machine is often used for washing karts, walls, floors, booths and the like, a user can use the cleaning machine in various occasions, the existing cleaning machine usually adopts a plunger pump, and the portability of the cleaning machine is poor due to the large volume and the heavy weight of the existing plunger pump, so that the wider application of the cleaning machine is limited.

[ summary of the invention ]

The invention aims to provide a single-plunger type plunger pump beneficial to miniaturization of a handheld cleaning machine.

In order to solve the technical problems, the invention adopts the following technical scheme: a single-plunger pump is used for a handheld cleaning machine and comprises a plunger, a pump cover, a water outlet passage formed in the pump cover, a pump body, a crank connecting rod mechanism driving the plunger to move and a motor driving the crank connecting rod mechanism to move, wherein the pump cover is positioned on the front side of the pump body, a water outlet pipe is arranged on the pump cover, the plunger and the water outlet pipe respectively extend in the front-back direction, the water outlet passage penetrates through the water outlet pipe, the plunger is positioned on the back side of the pump body, the front end of the plunger extends forwards into the pump body and can move in the pump body to pressurize water in the pump body, the pressurized water flows out of the pump cover through the water outlet passage, the crank connecting rod mechanism is positioned on the back side of the back end of the plunger, and the back end of the plunger is positioned outside the pump body and is.

So design, pump cover, the pump body, plunger, crank link mechanism distribute in proper order from the front to back, and outlet pipe, plunger also extend along the fore-and-aft direction, and the plunger pump is elongated more on the whole for this single plunger type plunger pump's overall framework is more adapted in hand-held type cleaning machine, is favorable to affiliated hand-held type cleaning machine miniaturization.

Furthermore, the plunger pump also comprises a pressurizing chamber and a plurality of water inlet channels, the pressurizing chamber and the water inlet channels are arranged in the pump body, the front end of the plunger can move in the pressurizing chamber to pressurize the water in the pressurizing chamber, and the water outside the pressurizing chamber is converged into the pressurizing chamber through the water inlet channels in a multipath manner.

Furthermore, the plunger pump also comprises a plurality of water outlet channels, the water outlet channels are arranged in the pump body, and water in the pressurizing chamber flows out of the pressurizing chamber in a multi-path mode through the water outlet channels.

Furthermore, the central axis of the motor rotating shaft, the central axis of the at least one water inlet channel, the central axis of the at least one water outlet channel and the central axis of the plunger are positioned on the same plane.

Furthermore, a first communicating hole is formed in the pump body, the plurality of water outlet channels comprise first water outlet channels, the plurality of water inlet channels comprise first water inlet channels, the first communicating hole forms a part of the pressurizing cavity, the first communicating hole communicates the first water outlet channels with the first water inlet channels, and the plunger pump further comprises a first plug for plugging the first communicating hole.

Furthermore, the plunger pump also comprises a water inlet passage formed in the pump cover, the pump cover is provided with a water inlet pipe adjacent to the water outlet pipe, the water inlet passage penetrates through the water inlet pipe, the water outlet passage comprises a longitudinal passage and a transverse passage which are communicated, the longitudinal passage is perpendicular to the plunger, the transverse passage is parallel to the plunger, and water outside the plunger pump sequentially enters the plunger pump through the longitudinal passage and the transverse passage.

Furthermore, a second communicating hole and a third communicating hole are further formed in the pump body, the plurality of water outlet channels further comprise a second water outlet channel and a third water outlet channel, the plurality of water inlet channels further comprise a second water inlet channel and a third water inlet channel, the second communicating hole and the third communicating hole respectively form a part of the pressurizing chamber, the second communicating hole communicates the second water outlet channel with the second water inlet channel, the third communicating hole communicates the third water outlet channel with the third water inlet channel, and the plunger pump further comprises a second plug for plugging the second communicating hole and a third plug for plugging the third communicating hole.

Furthermore, the first communicating hole, the second communicating hole and the third communicating hole are mutually intersected, and the included angle between every two of the first communicating hole, the second communicating hole and the third communicating hole is 120 degrees.

Furthermore, the central axis of the first communicating hole, the central axis of the second communicating hole and the central axis of the third communicating hole are coplanar and perpendicular to the central axis of the plunger respectively.

Furthermore, the pump body is further provided with a first outer side face, a second outer side face and a third outer side face, the first communicating hole extends into the plunger pump from the first outer side face, the second communicating hole extends into the plunger pump from the second outer side face, the third communicating hole extends into the plunger pump from the third outer side face, the first communicating hole is located between the second outer side face and the third outer side face, the second communicating hole is located between the first outer side face and the third outer side face, and the third communicating hole is located between the second outer side face and the first outer side face.

Furthermore, the central axis of the first communication hole and the central axis of the plunger are coplanar on a fourth plane, the central axis of the second communication hole and the central axis of the plunger are coplanar on a fifth plane, the central axis of the third communication hole and the central axis of the plunger are coplanar on a sixth plane, and the included angle between every two of the fourth plane, the fifth plane and the sixth plane is 120 degrees.

Furthermore, the first water outlet channel and the first water inlet channel are arranged in parallel, and the first water outlet channel and the first water inlet channel are perpendicular to the first communication hole respectively.

Furthermore, the first water outlet channel and the first water inlet channel are arranged in parallel, and the central axis of the first water outlet channel, the central axis of the first water inlet channel and the central axis of the first communication hole are coplanar.

Furthermore, the central axis of the first water outlet channel and the central axis of the first water inlet channel are parallel to the central axis of the water outlet passage respectively, and the central axis of the first water outlet channel, the central axis of the first water inlet channel and the central axis of the water outlet passage are coplanar.

Further, the pressurization chamber includes the central part, and first communicating hole includes first outer hole section and first inner hole section separated by the central part, first end cap shutoff first outer hole section, and first outer hole section intercommunication central part and the plunger pump outside after removing first end cap, first inner hole section is located the plunger pump inside and with first water outlet channel and first water inlet channel intercommunication.

Further, the plunger pump further comprises a water seal sleeved on the plunger, the pump body is further provided with an outer port connected between the pressurizing chamber and the outside of the pump body, at least part of the water seal is contained in the outer port, and the front end of the plunger penetrates through the outer port to enter the pressurizing chamber.

Further, the pressurizing chamber further comprises a central portion and a connecting hole section connected between the central portion and the outer port, the plunger portion is accommodated in the connecting hole section, the connecting hole section falls into the outer port along a projection of the outer port in a first direction, and the first direction is parallel to the plunger.

Furthermore, the plunger pump further comprises a first cover body and a second cover body which are positioned on the rear side of the pump body, the pump cover is positioned on the front side of the pump body, the rear end of the plunger is accommodated in a space defined by the first cover body and the second cover body, front ends of the first cover body and the second cover body are provided with front ports which are in butt joint with outer ports of the pump body, the outer port of the pump body and the front ports jointly accommodate the water seal, and the plunger penetrates through the outer port of the pump body and the front ports.

Furthermore, the central axis of each water outlet channel is parallel to but not coincident with the central axis of the plunger.

Furthermore, the central axis of each water inlet channel is parallel to but not coincident with the central axis of the plunger.

Furthermore, the plunger pump also comprises a water inlet cavity and a water outlet cavity, wherein the water inlet cavity is communicated with the pressurizing cavity in a multi-way mode through the water inlet channels, and the pressurizing cavity is communicated with the water outlet cavity in a multi-way mode through the water outlet channels.

Furthermore, the water inlet channels comprise a first water inlet channel, a second water inlet channel and a third water inlet channel, and a connecting line of three intersection points of the central axis of the first water inlet channel, the central axis of the second water inlet channel and the central axis of the third water inlet channel and a first plane vertical to the central axis of the plunger piston, which intersects, forms a first triangle.

Furthermore, the first triangle is an isosceles triangle or an equilateral triangle, and the central axis of the plunger penetrates through the outer center of the first triangle.

Furthermore, the first triangle is an isosceles triangle or an equilateral triangle, and the central axis of the water outlet passage passes through the outer center of the first triangle.

Furthermore, the plunger pump further comprises a plurality of water outlet channels, the plurality of water outlet channels are arranged in the pump body, water in the pressurizing chamber flows out of the pressurizing chamber through the plurality of water outlet channels in a multi-path mode, the plurality of water outlet channels comprise a first water outlet channel, a second water outlet channel and a third water outlet channel, a second triangle is formed by connecting the central axis of the first water outlet channel, the central axis of the second water outlet channel and the central axis of the third water outlet channel with three intersection points of the first plane, and the second triangle is located in the first triangle.

Furthermore, the second triangle is an isosceles triangle or an equilateral triangle, and the central axis of the plunger penetrates through the outer center of the second triangle.

Furthermore, the second triangle is an isosceles triangle or an equilateral triangle, and the central axis of the water outlet pipe penetrates through the outer center of the second triangle.

Furthermore, the central axis of the first water outlet channel, the central axis of the first water inlet channel and the central axis of the plunger are coplanar, the central axis of the second water outlet channel, the central axis of the second water inlet channel and the central axis of the plunger are coplanar, and the central axis of the third water outlet channel, the central axis of the third water inlet channel and the central axis of the plunger are coplanar.

Furthermore, the plunger pump further comprises a plurality of water inlet check valves and a plurality of water outlet check valves, wherein the water inlet check valves are arranged in the corresponding water inlet channels and used for opening and closing the corresponding water inlet channels, and the water outlet check valves are arranged in the corresponding water outlet channels and used for opening and closing the corresponding water outlet channels.

Furthermore, the plunger pump further comprises a first cover body, a second cover body positioned on the lower side of the first cover body, a gear box positioned on the lower side of the first cover body, and a gear transmission mechanism for driving the crank link mechanism, wherein the gear transmission mechanism is positioned in the gear box, the crank link mechanism comprises a connecting rod movably connected to the plunger and a crankshaft for driving the connecting rod, the joint of the connecting rod and the plunger is contained in a space surrounded by the first cover body and the second cover body, and the crankshaft is contained in the space surrounded by the first cover body and the gear box.

Furthermore, the plunger pump still includes the stop valve of assembling in the pump cover and the pump body, the inhalant canal that is formed in the pump cover, the pressurization cavity that is formed in the pump body, the inhalant canal that is formed between the pump cover and the pump body, the play water cavity that is formed between the stop valve and the pump body, the stop valve separates inhalant canal and play water cavity, the outside water of plunger pump gets into the pressurization cavity through inhalant canal, inhalant canal in proper order, the front end of plunger can move in the pressurization cavity in order to pressurize the water in the pressurization cavity, and the water after the pressurization flows out from the pump cover through play water cavity, stop valve, play water route in proper order.

Furthermore, the stop valve comprises a front end part mounted on the pump cover, a main body part mounted on the pump body and a through hole penetrating through the front end part and the main body part, and the water outlet passage is communicated with the water outlet cavity through the through hole.

Furthermore, the plunger pump also comprises a plurality of water inlet channels and a plurality of water outlet channels which are arranged in the pump body, the water inlet cavity is communicated with the pressurizing cavity in a multi-way manner through the plurality of water inlet channels, the pressurizing cavity is communicated with the water outlet cavity in a multi-way manner through the plurality of water outlet channels, the number of the plurality of water inlet channels is three, the water inlet channels are respectively a first water inlet channel, a second water inlet channel and a third water inlet channel, the central axis of the first water inlet channel, the central axis of the second water inlet channel and the central axis of the third water inlet channel are connected with three intersection points of a second plane vertical to the central axis of the plunger to form a third triangle, the third triangle is located in the outer contour line of the vertical projection of the stop valve main body part on the second plane, and the second plane is set to be the plane where any section of any water inlet channel is perpendicular to the central axis of the plunger piston.

Furthermore, the number of the plurality of water outlet channels is three, and the plurality of water outlet channels are respectively a first water outlet channel, a second water outlet channel and a third water outlet channel, a line connecting three intersection points where the central axis of the first water outlet channel, the central axis of the second water outlet channel and the central axis of the third water outlet channel intersect with a third plane perpendicular to the central axis of the plunger forms a fourth triangle, a vertical projection of the stop valve main body portion on the third plane is located in the fourth triangle, and the third plane is set as a plane where any cross section perpendicular to the central axis of the plunger of any one water outlet channel is located.

The plunger pump is characterized in that the third sealing ring is sleeved on the main body part of the stop valve, the main body part of the stop valve is assembled into the pump body, and the main body part of the stop valve is sealed with the pump body by the third sealing ring.

Furthermore, the motor is located the crank link mechanism downside, the pivot perpendicular to plunger and the outlet pipe of motor, the axis of outlet pipe, the axis of motor shaft, the axis three coplane of plunger.

The invention also provides a handheld cleaning machine which comprises the single-plunger type plunger pump.

Furthermore, the cleaning machine comprises a handle for holding the cleaning machine in hand, a motor of the plunger pump is accommodated in the handle, a rotating shaft of the motor extends along the vertical direction, and the center of gravity of the motor is located in the handle.

[ description of the drawings ]

FIG. 1 is a perspective view of a plunger pump of the present invention;

FIG. 2 is a perspective view of the plunger pump of the present invention with the first cover removed;

FIG. 3 is a perspective view of the plunger pump of the present invention with the first cover, gear box and gear ring removed;

FIG. 4 is a perspective view of the plunger pump of the present invention with the first cover and the second cover removed;

FIG. 5 is a perspective view of the plunger pump of the present invention with the first cover, the second cover, and the gear case removed;

FIG. 6 is an exploded view of the plunger pump of the present invention;

FIG. 7 is a cross-sectional view of the plunger pump of the present invention (the cross-section is a plane where the central axis of the motor shaft and the central axis of the plunger are located);

FIG. 8 is a perspective view of a pump cap of the plunger pump of the present invention;

FIG. 9 is an angled perspective view of the pump body of the plunger pump of the present invention;

FIG. 10 is a cross-sectional view of the pump body of the plunger pump of the present invention (the cross-section is a plane where the central axes of the first, second and third communication holes are located together);

FIG. 11 is a perspective view of another angle of the pump body of the plunger pump of the present invention;

FIG. 12 is a perspective view of the plunger pump of the present invention with the pump cover removed;

fig. 13 is a perspective view of the plunger pump shut-off valve of the present invention.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Referring to fig. 1 to 13, a plunger pump is used in a washing machine.

The plunger pump comprises a plunger 10, a pump cover 2, a pump body 3, a crank link mechanism for driving the plunger 10 to move, a motor 11 for driving the crank link mechanism to move, a water inlet passage 40, a water outlet passage 41, a water inlet cavity 42, a water outlet cavity 43, a stop valve 5 and a pressurizing cavity. The pump cover 2 is assembled with the pump body 3 together, the pump cover 2 is positioned at the front side of the pump body 3, the pump cover 2 is provided with a water inlet pipe 20 and a water outlet pipe 21, the water inlet pipe 20 is adjacent to the water outlet pipe 21, the water outlet pipe 21 is positioned at the front side of the pump cover 2, the plunger 10 and the water outlet pipe 21 respectively extend in the front and rear directions, the plunger 10 is positioned at the rear side of the pump body 3, the water outlet pipe 21 is parallel to the plunger 10, the front end of the plunger 10 extends forwards into the pump body 3 and can move in the pump body 3 to pressurize the water in the pump body 3, the pressurized water flows out of the pump cover 2 through the water outlet passage 41, the crank connecting rod mechanism is positioned at the rear side of the rear end of the plunger 10, the rear end of the plunger 10 is positioned outside the pump body 3 and is movably connected with the crank connecting rod mechanism, the pump cover 2, the pump body 3, the plunger 10, the plunger pump is beneficial to lengthening, the whole framework of the plunger pump is more suitable for the handheld cleaning machine, and the miniaturization of the handheld cleaning machine is facilitated.

The water inlet chamber 42 is located in the front of the pump body 3, the pressurizing chamber is located in the rear of the pump body 3, the water inlet chamber 42 is located in the front of the water outlet chamber 43, and the pressurizing chamber is located in the rear of the water outlet chamber 43. The water inlet passage 40 and the water outlet passage 41 are formed in the pump cover 2, the water outlet passage 41 penetrates through the water outlet pipe 21, the water inlet passage 40 penetrates through the water inlet pipe 20, and water outside the plunger pump enters the plunger pump through the water inlet passage 40; the water inlet passage 40 and the water outlet passage 41 are formed in the pump cover 2, the pressurizing chamber is formed in the pump body 3, the water inlet chamber 42 is formed between the pump cover 2 and the pump body 3, the water outlet chamber 43 is formed between the stop valve 5 and the pump body 3, and the stop valve 5 separates the water inlet chamber 42 from the water outlet chamber 43; the water outside the plunger pump enters the pressurizing chamber through the water inlet passage 40 and the water inlet chamber 42 in sequence, one end (the front end in the embodiment) of the plunger 10 can move in the pressurizing chamber to pressurize the water in the pressurizing chamber, the pressurized water flows out of the pump cover 2 through the water outlet chamber 43, the stop valve 5 and the water outlet passage 41 in sequence, and the pressurized water flows out of the plunger pump forward through the water outlet passage 41 in sequence. Because the chamber 42 of intaking is formed between pump cover 2 and the pump body 3, and the chamber 43 of going out is formed between stop valve 5 and the pump body 3, effectively utilize stop valve 5 to separate intake chamber 42 and the chamber 43 of going out, thereby, intake chamber 42 is almost together with the chamber 43 position of going out, and inhalant canal 40 and exhalant canal 41 are all integrated in pump cover 2, make whole space utilization and overall arrangement more intensive, are favorable to the miniaturization of plunger pump. Stop valve 5 assembles in pump cover 2 and pump body 3, and stop valve 5 is the check valve, can be used to prevent the water backward flow of outlet passage 41.

The motor 11 is located at the lower side of the crank link mechanism, and the rotating shaft 110 of the motor 11 is perpendicular to the plunger 10 and the water outlet pipe 21. The central axis of the water outlet pipe 21, the central axis of the rotating shaft 110 of the motor 11 and the central axis of the plunger 10 are coplanar. The central axis of the rotating shaft 110 of the motor 11, the central axis of the at least one water inlet channel, the central axis of the at least one water outlet channel and the central axis of the plunger 10 are located on the same plane. The central axis of the water outlet pipe 21 coincides with the central axis of the plunger 10. The rated power of the motor 11 is between 80w and 330w, preferably between 100w and 310w, further preferably between 140w and 220w, such as 150w, 160w, 170w, 180w, 190w, 200w, 210 w. The plunger pump of the present embodiment is a single plunger type plunger pump, and compared with the plunger of a multi-plunger type plunger pump, the diameter of the plunger 10 is larger to meet the flow requirement, and the diameter of the plunger 10 is between 14mm and 18mm, preferably 16 mm. The plunger 10 can press the water in the pressurizing chamber into the water outlet chamber 43, one end of the plunger 10 can move in the pressurizing chamber, and the other opposite end of the plunger 10 is positioned outside the pressurizing chamber; the pump cover 2 and the pump body 3 are respectively a one-piece part. The pump cover 2 and the pump body 3 are fixed through screws. The central axis of the water outlet pipe 21, the central axis of the rotating shaft 110 of the motor 11 and the central axis of the plunger 10 are coplanar, and the central axis of the water outlet pipe 21 is the same as the central axis of the first water outlet channel 44.

The plunger pump also comprises a plurality of water inlet channels and a plurality of water outlet channels, the water inlet channels and the water outlet channels are arranged in the pump body 3, water outside the pressurizing cavity is gathered into the pressurizing cavity in a multipath manner through the water inlet channels, water in the pressurizing cavity flows out of the pressurizing cavity in a multipath manner through the water outlet channels, the water inlet cavity 42 is communicated with the pressurizing cavity in a multipath manner through the water inlet channels, the pressurizing cavity is communicated with the water outlet cavity 43 in a multipath manner through the water outlet channels, water outside the plunger pump enters the water inlet cavity 42 through the water inlet passage 40, water in the water inlet cavity 42 enters the pressurizing cavity through the water inlet channels, water in the pressurizing cavity is gathered into the water outlet cavity 43 through the water outlet channels, water in the water outlet cavity 43 is discharged out of the plunger pump through the water outlet passage 41, the water between the water inlet cavity 42 and the pressurizing cavity and the water outlet cavity 43 are respectively communicated in a multipath manner, so that the water inlet cavity 42 and the pressurizing cavity are communicated with each other, The water paths of the pressurizing chamber and the water outlet chamber 43 are smoother, and even if part of the passages are completely blocked, the plunger pump can still run by means of the rest passages, so that the plunger pump runs more reliably. The water inlet channel is connected in parallel between the pressurizing chamber and the water inlet chamber 42, and the water outlet channel is connected in parallel between the pressurizing chamber and the water outlet chamber 43.

The plunger pump also comprises a plurality of water inlet one-way valves 12 and a plurality of water outlet one-way valves 13, wherein the water inlet one-way valves 12 are arranged on the corresponding water inlet channels and used for opening and closing the corresponding water inlet channels, the water outlet one-way valves 13 are arranged on the corresponding water outlet channels and used for opening and closing the corresponding water outlet channels, and because the water inlet chambers 42 and the pressurizing chambers and the water outlet chambers 43 are respectively communicated in a multi-way manner and are provided with the corresponding water inlet one-way valves 12 and the corresponding water outlet one-way valves 13, the water inlet load of the single water inlet one-way valve 12 and the water outlet load of the single water outlet one-way valve 13 are shared, the water inlet one-way valves 12 and the water outlet one-way valves 13 are not easy to damage, the service lives of the water inlet one-way. The water inlet check valves 12 are respectively accommodated in the corresponding water inlet passages, and the water outlet check valves 13 are respectively accommodated in the water outlet chambers 43 and the corresponding water outlet passages. The inlet check valve 12 includes a bracket 120, a valve core 121 and a spring (not shown) in the bracket 120, the water flow in the inlet passage pushes open the valve core 121 so that the inlet passage is opened, the outlet check valve 13 includes a bracket 130, a valve core 131 and a spring (not shown) in the bracket 130, and the water flow in the outlet passage pushes open the valve core 131 so that the outlet passage is opened.

The pump body 3 is provided with a first communicating hole 60, a second communicating hole 61 and a third communicating hole 62, the plurality of water outlet channels comprise a first water outlet channel 44, a second water outlet channel 45 and a third water outlet channel 46, the plurality of water inlet channels comprise a first water inlet channel 47, a second water inlet channel 48 and a third water inlet channel 49, and the first communicating hole 60, the second communicating hole 61 and the third communicating hole 62 respectively form part of a pressurizing chamber. The plunger pump further includes a first stopper (not shown) for blocking the first communication hole 60, a second stopper (not shown) for blocking the second communication hole 61, and a third stopper (not shown) for blocking the third communication hole 62. The first communication hole 60, the second communication hole 61, and the third communication hole 62 are drilled.

The first communication hole 60 communicates the first water outlet passage 44 with the first water inlet passage 47, the second communication hole 61 communicates the second water outlet passage 45 with the second water inlet passage 48, and the third communication hole 62 communicates the third water outlet passage 46 with the third water inlet passage 49. The included angle between each two of the first communication hole 60, the second communication hole 61 and the third communication hole 62 is 120 degrees, so that the first communication hole 60, the second communication hole 61 and the third communication hole 62 are uniformly distributed in a 360-degree range; the central axis of the first communication hole 60, the central axis of the second communication hole 61 and the central axis of the third communication hole 62 are coplanar and perpendicular to the central axis of the plunger 10; the central axis of the first communicating hole 60, the central axis of the second communicating hole 61 and the central axis of the third communicating hole 62 intersect at one point, and the included angle between each two of the central axis of the first communicating hole 60, the central axis of the second communicating hole 61 and the central axis of the third communicating hole 62 is 120 degrees.

The first water outlet channel 44 and the first water inlet channel 47 are arranged in parallel, and the first water outlet channel 44 and the first water inlet channel 47 are perpendicular to the first communication hole 60 respectively. The second water outlet channel 45 and the second water inlet channel 48 are arranged in parallel, and the second water outlet channel 45 and the second water inlet channel 48 are respectively vertical to the second communication hole 61; the third water outlet passage 46 and the third water inlet passage 49 are arranged in parallel, and the third water outlet passage 46 and the third water inlet passage 49 are perpendicular to the third communication hole 62, respectively. The central axis of the first water outlet channel 44, the central axis of the first water inlet channel 47, and the central axis of the first communication hole 60 are coplanar. The central axis of the second water outlet channel 45, the central axis of the second water inlet channel 48 and the central axis of the second communication hole 61 are coplanar; the central axis of the third water outlet passage 46, the central axis of the third water inlet passage 49, and the central axis of the third communication hole 62 are coplanar. The central axis of the first water outlet channel 44 and the central axis of the first water inlet channel 47 are respectively parallel to the central axis of the water outlet channel 41, and the central axis of the first water outlet channel 44, the central axis of the first water inlet channel 47 and the central axis of the water outlet channel 41 are coplanar. The central axis of the second water outlet channel 45 and the central axis of the second water inlet channel 48 are respectively parallel to the central axis of the water outlet channel 41, and the central axis of the second water outlet channel 45, the central axis of the second water inlet channel 48 and the central axis of the water outlet channel 41 are coplanar. The central axis of the third water outlet channel 46 and the central axis of the third water inlet channel 49 are respectively parallel to the central axis of the water outlet channel 41, and the central axis of the third water outlet channel 46, the central axis of the third water inlet channel 49 and the central axis of the water outlet channel 41 are coplanar. The first water outlet channel 44 is parallel to the first water inlet channel 47, the second water outlet channel 45 is parallel to the second water inlet channel 48, the third water outlet channel 46 is parallel to the third water inlet channel 49, and the first water outlet channel 44, the second water outlet channel 45 and the third water outlet channel 46 are parallel to each other.

The pressurizing chamber includes a central portion 63, and the first communication hole 60, the second communication hole 61, and the third communication hole 62 are divided into two sections by the central portion 63; the first communication hole 60 includes a first outer hole section 600 and a first inner hole section 601 separated by the central portion 63, the first plug plugs the first outer hole section 600, the first outer hole section 600 communicates the central portion 63 with the outside of the plunger pump after the first plug is removed, and the first inner hole section 601 is located inside the plunger pump and communicates the first water outlet passage 44 with the first water inlet passage 47. The first water outlet passage 44 is located between the first outer hole section 600 and the first water inlet passage 47, and the first plug plugs the outer end of the first outer hole section 600. The second communication hole 61 includes a second outer hole section 610 and a second inner hole section 611 separated by the central portion 63, the second plug plugs the second outer hole section 610, the second outer hole section 610 communicates the central portion 63 with the outside of the plunger pump after the second plug is removed, the second inner hole section 611 is located inside the plunger pump and communicates the second water outlet passage 45 with the second water inlet passage 48, the second water outlet passage 45 is located between the second outer hole section 610 and the second water inlet passage 48, and the second plug plugs the outer end of the second outer hole section 610. The third communication hole 62 includes a third outer hole section 620 and a third inner hole section 621 separated by the central portion 63, the third plug plugs the third outer hole section 620, the third outer hole section 620 communicates the central portion 63 with the outside of the plunger pump after the third plug is removed, the third inner hole section 621 is located inside the plunger pump and communicates the third water outlet passage 46 with the third water inlet passage 49, the third water outlet passage 46 is located between the third outer hole section 620 and the third water inlet passage 49, and the third plug plugs the outer end of the third outer hole section 620.

The pump body 3 is further provided with a first outer side face 33, a second outer side face 34 and a third outer side face 35, the first outer side face 33, the second outer side face 34 and the third outer side face 35 are exposed outside the plunger pump respectively, a first communication hole 60 extends from the first outer side face 33 to the plunger pump, a second communication hole 61 extends from the second outer side face 34 to the plunger pump, a third communication hole 62 extends from the third outer side face 35 to the plunger pump, an included angle between the first outer side face 33, the second outer side face 34 and the third outer side face 35 is 120 degrees, the first communication hole 60 is positioned between the second outer side face 34 and the third outer side face 35, the second communication hole 61 is positioned between the first outer side face 33 and the third outer side face 35, the third communication hole 62 is positioned between the second outer side face 34 and the first outer side face 33, the second outer side face 34 and the third outer side face 35 are parallel to the plunger, The second outer side 34 and the third outer side 35.

The plunger pump further comprises a water seal (not shown) sleeved on the plunger 10, the pump body 3 is further provided with an outer port 30, the outer port 30 is connected between the pressurization chamber and the outside of the pump body 3, the water seal is at least partially accommodated in the outer port 30, and one end of the plunger 10 penetrates through the outer port 30 and enters the central portion 63. The pressurizing chamber further comprises a connecting bore section 64 connected between the central portion 63 and the outer port 30, the plunger 10 is partially received in the connecting bore section 64, the connecting bore section 64 falls into the outer port 30 along a projection of the connecting bore section 64 to the outer port 30 along a first direction, the first direction is parallel to the plunger 10, an annular step surface (not numbered) is arranged between the connecting bore section 64 and the outer port 30, and the water seal is in forward abutment with the step surface. The central axes of the connecting hole section 64 and the plunger 10 coincide, and the connecting hole section 64 is located in the pump body 3. The pressurizing chamber of the present embodiment includes a central portion 63, a first communicating hole 60, a second communicating hole 61, a third communicating hole 62, and a connecting hole section 64, and the first communicating hole 60, the second communicating hole 61, the third communicating hole 62, and the connecting hole section 64 communicate with each other and intersect with the central portion 63; the connecting hole section 64 is formed in advance, and after the first communication hole 60, the second communication hole 61, and the third communication hole 62 are drilled, the central portion 63 is formed where the first communication hole 60, the second communication hole 61, the third communication hole 62, and the connecting hole section 64 meet.

The plunger pump further includes a first cover 15 and a second cover 16 located at the rear side of the pump body 3, the pump cover 2 is located at the front side of the pump body 3, one end of the plunger 10 located outside the pump body 3 is accommodated in a space surrounded by the first cover 15 and the second cover 16 (in the present embodiment, the rear end of the plunger 10 is accommodated in the space surrounded by the first cover 15 and the second cover 16), front ends of the first cover 15 and the second cover 16 are provided with front ports 17 butted with the outer ports 30 of the pump body 3, the outer ports 30 and the front ports 17 accommodate water seals together, and the plunger 10 penetrates through the outer ports 30 and the front ports 17. The plunger 10 is partially accommodated in a space enclosed by the first cover body 15 and the second cover body 16, a guide channel (not numbered) extending back and forth is formed between the first cover body 15 and the second cover body 16, the plunger 10 penetrates through the guide channel, and the plunger 10 can reciprocate back and forth along the guide channel; in the present embodiment, the first lid body 15 is an upper lid, and the second lid body 16 is a lower lid.

The water inlet passage 40 and the water outlet passage 41 respectively penetrate through the pump cover 2, one end of the plunger 10 extends into the pump body 3, the other end, opposite to the plunger 10, of the plunger 10 is located outside the pump body 3, the water inlet passage 40 comprises a longitudinal passage 400 and a transverse passage 401 which are communicated, the longitudinal passage 400 is perpendicular to the plunger 10, the transverse passage 401 is parallel to the plunger 10, the transverse passage 401 is communicated between the longitudinal passage 400 and the water inlet cavity 42, water outside the plunger pump sequentially enters the plunger pump through the longitudinal passage 400 and the transverse passage 401, the water inlet pipe 20 is straight, the water outlet pipe 21 is L-shaped, and five of a central axis of the transverse passage 401, a central axis of the longitudinal passage 400, a central axis of the water outlet passage 41, a central axis of the plunger 10 and a central axis of the rotating shaft 110.

The water in the water outlet chamber 43 sequentially passes through the stop valve 5 and the water outlet passage 41 to be discharged out of the plunger pump, the plunger pump further comprises a first sealing ring 180 playing a sealing role between the pump cover 2 and the pump body 3, a second sealing ring 181 sealing the pump cover 2 and the stop valve 5, and a third sealing ring 182 sealing the pump body 3 and the stop valve 5, the pump cover 2 is provided with a rear end face 22 facing the pump body 3, the pump body 3 is provided with a front end face 31 facing the rear end face 22 of the pump cover 2, one of the rear end face 22 of the pump cover 2 and the front end face 31 of the pump body 3 is provided with a first accommodating groove 32 accommodating the first sealing ring 180, and the first accommodating groove 32 is arranged on the front end face 31 of the pump. The first seal ring 180 seals the space between the pump cover 2 and the pump body 3 so that water does not leak between the pump cover 2 and the pump body 3. The first sealing ring 180 is in a triangular ring shape, and the first sealing ring 180 is located at the periphery of the water inlet chamber 42. The outer surface of the shutoff valve 5 is provided with a second housing groove 50 housing the second seal 181 and a third housing groove 51 housing the third seal 182. The second receiving groove 50 and the second seal 181 are circular rings, and the third receiving groove 51 and the third seal 182 are triangular rings. The shutoff valve 5 includes a distal end portion 52 attached to the pump cover 2, a main body portion 53 attached to the pump body 3, and a through hole 54 penetrating the distal end portion 52 and the main body portion 53, and the water outlet passage 41 and the water outlet chamber 43 communicate with each other through the through hole 54. The section of the front end part 52 perpendicular to the central axis of the plunger 10 is circular, and the section of the main body part 53 of the stop valve 5 perpendicular to the central axis of the plunger 10 is triangular.

The central axis of the first water inlet channel 47, the central axis of the second water inlet channel 48 and the central axis of the third water inlet channel 49 are connected with the three intersection points of a first plane perpendicular to the central axis of the plunger 10 to form a first triangle, namely, the connecting lines of the intersection points of the central axis of the first water inlet channel 47 and the first plane, the intersection points of the central axis of the second water inlet channel 48 and the first plane and the intersection points of the central axis of the third water inlet channel 49 and the first plane form a first triangle, the first triangle is an isosceles triangle or an equilateral triangle, and the central axis of the plunger 10 passes through the outer center of the first triangle. The outer center of the triangle: the intersection point of the three perpendicular bisectors of the triangle is also the center of the circumscribed circle. The central axis of the water outlet passage 41 and the central axis of the water outlet pipe 21 pass through the outer center of the first triangle. The connecting lines of three intersection points where the central axis of the first water outlet channel 44, the central axis of the second water outlet channel 45 and the central axis of the third water outlet channel 46 intersect with the first plane form a second triangle, that is, the connecting lines of the intersection point of the central axis of the first water outlet channel 44 and the first plane, the intersection point of the central axis of the second water outlet channel 45 and the first plane, and the intersection point of the central axis of the third water outlet channel 46 and the first plane form a second triangle, the second triangle is located inside the first triangle, the second triangle is an isosceles triangle or an equilateral triangle, the central axis of the plunger 10 passes through the outer center of the second triangle, and the central axis of the water outlet channel 41 and the central axis of the water outlet pipe 21 pass through the outer center of the second triangle. The central axis of the first water outlet channel 44, the central axis of the first water inlet channel 47 and the central axis of the plunger 10 are coplanar, the central axis of the second water outlet channel 45, the central axis of the second water inlet channel 48 and the central axis of the plunger 10 are coplanar, and the central axis of the third water outlet channel 46, the central axis of the third water inlet channel 49 and the central axis of the plunger 10 are coplanar.

The central axis of each water outlet channel is parallel to but not coincident with the central axis of the plunger 10. The central axis of each water inlet channel is parallel to but not coincident with the central axis of the plunger 10. The plurality of water inlet channels are arranged at the periphery of the plurality of water outlet channels. In this embodiment, the number of the plurality of water inlet channels is three, and a connecting line of three intersection points where three central axes of the first water inlet channel 47, the second water inlet channel 48, and the third water inlet channel 49 intersect with a second plane perpendicular to the central axis of the plunger 10 forms a third triangle (i.e., an intersection point where the central axis of the first water inlet channel 47 intersects with the second plane, an intersection point where the central axis of the second water inlet channel 48 intersects with the second plane, and an intersection point where the central axis of the third water inlet channel 49 intersects with the second plane form a third triangle), the third triangle is located within an outer contour line of a vertical projection of the main body portion 53 of the stop valve 5 on the second plane, and the second plane is set as a plane where any longitudinal section of any water inlet channel (the longitudinal section is required to be perpendicular to the central axis 10 of the plunger) is located. The main body 53 of the shut-off valve 5 has a substantially triangular contour in a vertical projection on the second plane, i.e., in a direction required to project the second plane perpendicularly to the second plane. The number of the plurality of water outlet channels is three, and the three water outlet channels are respectively a first water outlet channel 44, a second water outlet channel 45 and a third water outlet channel 46, a connecting line of three intersection points of a central axis of the first water outlet channel 44, a central axis of the second water outlet channel 45 and a central axis of the third water outlet channel 46 and a third plane vertical to the central axis of the plunger 10 forms a fourth triangle, a vertical projection of the main body part 53 of the stop valve 5 on the third plane is located in the fourth triangle, and the third plane is set as a plane where any cross section of any one water outlet channel vertical to the central axis of the plunger 10 is located. The perpendicular projection in the third plane, i.e. the projection direction, is perpendicular to the third plane.

The central axis of the first communication hole 60 and the central axis of the plunger 10 are coplanar on a fourth plane, the central axis of the second communication hole 61 and the central axis of the plunger 10 are coplanar on a fifth plane, the central axis of the third communication hole 62 and the central axis of the plunger 10 are coplanar on a sixth plane, and the included angle between every two of the fourth plane, the fifth plane and the sixth plane is 120 degrees.

The second sealing ring 181 is fitted over the front end portion 52 of the shut-off valve 5, the pump cover 2 further includes an annular flange 23, the front end portion 52 of the shut-off valve 5 is fitted into the annular flange 23, and the second sealing ring 181 seals between the front end portion 52 of the shut-off valve 5 and the annular flange 23. The inlet chamber 42 is in the form of an irregular annular space surrounding the flange 23 and the front end 52 of the shut-off valve 5. The third seal ring 182 is fitted over the main body portion 53 of the stop valve 5, the main body portion 53 of the stop valve 5 is fitted into the pump body 3, and the third seal ring 182 seals between the main body portion 53 of the stop valve 5 and the pump body 3.

The plunger pump further comprises a gear box 19 positioned on the lower side of the first cover body 15, the second cover body 16 is positioned on the lower side of the first cover body 15, the gear transmission mechanism is positioned in the gear box 19, the crank-link mechanism comprises a connecting rod 70 movably connected to the plunger 10 and a crankshaft 71 driving the connecting rod 70, the connecting rod 70 is connected with the plunger 10 through a pin 72, the connecting part of the connecting rod 70 and the plunger 10 is accommodated in a space enclosed by the first cover body 15 and the second cover body 16, and the crankshaft 71 is accommodated in a space enclosed by the first cover body 15 and the gear box 19. The gear transmission mechanism is preferably a planetary gear transmission mechanism, the gear transmission mechanism comprises a driving gear 80 fixed on a rotating shaft 110 of the motor 11, two planetary gears 81, a gear ring 82 and a gear rack 83, the crankshaft 71 is fixed on the gear rack 83, the driving gear 80 is driven by the rotating shaft 110 of the motor 11 to drive the two planetary gears 81, and the gear rack 83 and the crankshaft 71 are driven to rotate in the process that the two planetary gears 81 move along the internal teeth of the gear ring 82; the first cover 15 and the second cover 16 are locked, for example, by screws; the first cover 15 is locked with the gear box 19, for example by means of screws; the front end of the first cover 15 and the front end of the second cover 16 are respectively abutted forward against the pump body 3.

The plunger pump of the present invention is used in a washing machine (not shown), particularly a hand-held washing machine, the washing machine comprising a handle for holding the washing machine, a battery for powering the motor; the motor 11 is accommodated in the handle, the gravity center of the motor 11 is positioned in the handle, the influence of vibration of the motor 11 can be reduced, and the human hand can control the cleaning machine more stably; the motor 11 is assembled at the lower side of the gear box 19, the lower end of the gear box 19 is at least partially accommodated in the handle, the motor 11 and the gear box 19 are arranged by fully utilizing the space in the handle, the space is saved, and the miniaturization of the handheld cleaning machine is promoted.

While the present invention has been described with reference to the preferred 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 invention as defined by the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (38)

1. The utility model provides a single plunger type plunger pump for hand-held type cleaning machine, includes plunger, pump cover, the delivery passage that is formed in the pump cover, the pump body, the crank link mechanism of drive plunger motion, the motor of drive crank link mechanism motion which characterized in that: the pump cover is positioned on the front side of the pump body, the pump cover is provided with a water outlet pipe positioned on the front side of the pump cover, the plunger and the water outlet pipe respectively extend in the front-back direction, the water outlet passage penetrates through the water outlet pipe, the plunger is positioned on the back side of the pump body, the front end of the plunger extends forwards into the pump body and can move in the pump body to pressurize water in the pump body, the pressurized water flows out of the pump cover through the water outlet passage, the crank connecting rod mechanism is positioned on the back side of the back end of the plunger, and the back end of the plunger is positioned outside the pump body and is movably connected with the crank connecting rod mechanism; the single-plunger type plunger pump also comprises a pressurizing chamber, the pressurizing chamber is arranged in the pump body, and the front end of the plunger can move in the pressurizing chamber to pressurize water in the pressurizing chamber; the single-plunger type plunger pump also comprises a water seal sleeved on the plunger, the pump body is also provided with an outer port connected between the pressurization chamber and the outside of the pump body, and at least part of the water seal is accommodated in the outer port; the pressurization chamber further comprises a central portion and a connecting hole section connected between the central portion and the outer port, the plunger portion is contained in the connecting hole section, the connecting hole section falls into the outer port along the projection of a first direction to the outer port, and the first direction is parallel to the plunger.

2. The single plunger type plunger pump of claim 1, wherein: the water pump further comprises a plurality of water inlet channels, the water inlet channels are arranged in the pump body, and water outside the pressurizing chamber is converged into the pressurizing chamber through the water inlet channels in a multi-path mode.

3. The single plunger type plunger pump of claim 2, wherein: the water pump further comprises a plurality of water outlet channels, the water outlet channels are arranged in the pump body, and water in the pressurizing chamber flows out of the pressurizing chamber in a multi-path mode through the water outlet channels.

4. The single plunger type plunger pump of claim 3, wherein: the central axis of the motor rotating shaft, the central axis of the at least one water inlet channel, the central axis of the at least one water outlet channel and the central axis of the plunger are positioned on the same plane.

5. The single plunger type plunger pump of claim 3, wherein: the plunger pump is characterized in that a first communication hole is formed in the pump body, the plurality of water outlet channels comprise first water outlet channels, the plurality of water inlet channels comprise first water inlet channels, the first communication hole forms one part of the pressurization cavity, the first communication hole communicates the first water outlet channels with the first water inlet channels, and the plunger pump further comprises a first plug for plugging the first communication hole.

6. The single plunger type plunger pump of claim 1, wherein: the plunger pump is characterized by further comprising a water inlet passage formed in the pump cover, the pump cover is provided with a water inlet pipe adjacent to the water outlet pipe, the water inlet passage penetrates through the water inlet pipe, the water outlet passage comprises a longitudinal passage and a transverse passage which are communicated, the longitudinal passage is perpendicular to the plunger, the transverse passage is parallel to the plunger, and water outside the plunger pump sequentially enters the plunger pump through the longitudinal passage and the transverse passage.

7. The single plunger type plunger pump of claim 5, wherein: second intercommunicating pore, third intercommunicating pore have still been seted up to the pump body, a plurality of water channels still include second water outlet channel, third water outlet channel, a plurality of water inlet channels still include second water inlet channel, third water inlet channel, second intercommunicating pore, third intercommunicating pore constitute the partly of pressurization cavity respectively, the second intercommunicating pore is with second water outlet channel and second water inlet channel intercommunication, the third intercommunicating pore is with third water outlet channel and third water inlet channel intercommunication, and the plunger pump still includes the second end cap of shutoff second intercommunicating pore, the third end cap of shutoff third intercommunicating pore.

8. The single plunger piston pump as in claim 7, wherein: the first communicating hole, the second communicating hole and the third communicating hole are crossed and converged, and the included angle between every two first communicating holes, the second communicating holes and the third communicating holes is 120 degrees.

9. The single plunger piston pump as in claim 7, wherein: the central axis of the first communicating hole, the central axis of the second communicating hole and the central axis of the third communicating hole are coplanar and perpendicular to the central axis of the plunger respectively.

10. The single plunger piston pump as in claim 7, wherein: the pump body is further provided with a first outer side face, a second outer side face and a third outer side face, the first communicating hole extends towards the inside of the plunger pump from the first outer side face, the second communicating hole extends towards the inside of the plunger pump from the second outer side face, the third communicating hole extends towards the inside of the plunger pump from the third outer side face, the first communicating hole is located between the second outer side face and the third outer side face, the second communicating hole is located between the first outer side face and the third outer side face, and the third communicating hole is located between the second outer side face and the first outer side.

11. The single plunger piston pump as in claim 7, wherein: the central axis of the first communicating hole and the central axis of the plunger are coplanar on a fourth plane, the central axis of the second communicating hole and the central axis of the plunger are coplanar on a fifth plane, the central axis of the third communicating hole and the central axis of the plunger are coplanar on a sixth plane, and the included angle between every two of the fourth plane, the fifth plane and the sixth plane is 120 degrees.

12. The single plunger type plunger pump of claim 5, wherein: the first water outlet channel and the first water inlet channel are arranged in parallel, and the first water outlet channel and the first water inlet channel are perpendicular to the first communication hole respectively.

13. The single plunger type plunger pump of claim 5, wherein: the first water outlet channel and the first water inlet channel are arranged in parallel, and the central axis of the first water outlet channel, the central axis of the first water inlet channel and the central axis of the first communication hole are coplanar.

14. The single plunger type plunger pump of claim 5, wherein: the central axis of the first water outlet channel and the central axis of the first water inlet channel are respectively parallel to the central axis of the water outlet passage, and the central axis of the first water outlet channel, the central axis of the first water inlet channel and the central axis of the water outlet passage are coplanar.

15. The single plunger type plunger pump of claim 5, wherein: the pressurization chamber comprises a central part, the first communication hole comprises a first outer hole section and a first inner hole section which are separated by the central part, the first plug plugs the first outer hole section, the first outer hole section is communicated with the central part and the outside of the plunger pump after the first plug is removed, and the first inner hole section is positioned in the plunger pump and communicates the first water outlet channel and the first water inlet channel.

16. The single plunger type plunger pump of claim 2, wherein: the plunger front end passes through the outer port into the pressurization chamber.

17. The single plunger type plunger pump of claim 1, wherein: the water outlet passage penetrates through the pump cover from front to back.

18. The single plunger type plunger pump of claim 1, wherein: the pump cover is positioned on the front side of the pump body, the rear end of the plunger is accommodated in a space defined by the first cover body and the second cover body, front ends of the first cover body and the second cover body are provided with front ports in butt joint with outer ports of the pump body, the outer ports of the pump body and the front ports accommodate the water seal together, and the plunger penetrates through the outer ports of the pump body and the front ports.

19. The single plunger type plunger pump of claim 3, wherein: the central axis of each water outlet channel is parallel to but not coincident with the central axis of the plunger.

20. The single plunger type plunger pump of claim 2, wherein: the central axis of each water inlet channel is parallel to but not coincident with the central axis of the plunger.

21. The single plunger type plunger pump of claim 3, wherein: the water inlet cavity is communicated with the pressurizing cavity in a multi-path mode through the water inlet channels, and the pressurizing cavity is communicated with the water outlet cavity in a multi-path mode through the water outlet channels.

22. The utility model provides a single plunger type plunger pump for hand-held type cleaning machine, includes plunger, pump cover, the delivery passage that is formed in the pump cover, the pump body, the crank link mechanism of drive plunger motion, the motor of drive crank link mechanism motion which characterized in that: the pump cover is positioned on the front side of the pump body, the pump cover is provided with a water outlet pipe positioned on the front side of the pump cover, the plunger and the water outlet pipe respectively extend in the front-back direction, the water outlet passage penetrates through the water outlet pipe, the plunger is positioned on the back side of the pump body, the front end of the plunger extends forwards into the pump body and can move in the pump body to pressurize water in the pump body, the pressurized water flows out of the pump cover through the water outlet passage, the crank connecting rod mechanism is positioned on the back side of the back end of the plunger, and the back end of the plunger is positioned outside the pump body and is movably connected with the crank connecting rod mechanism; the single-plunger type plunger pump also comprises a pressurizing chamber and a plurality of water inlet channels, wherein the pressurizing chamber and the plurality of water inlet channels are arranged in the pump body, the front end of the plunger can move in the pressurizing chamber to pressurize the water in the pressurizing chamber, and the water outside the pressurizing chamber is multiplexed into the pressurizing chamber through the plurality of water inlet channels; the plurality of water inlet channels comprise a first water inlet channel, a second water inlet channel and a third water inlet channel, and a connecting line of three intersection points of the central axis of the first water inlet channel, the central axis of the second water inlet channel and the central axis of the third water inlet channel and a first plane vertical to the central axis of the plunger piston is connected to form a first triangle.

23. The single plunger piston pump as in claim 22, wherein: the first triangle is an isosceles triangle or an equilateral triangle, and the central axis of the plunger penetrates through the outer center of the first triangle.

24. The single plunger piston pump as in claim 22, wherein: the first triangle is an isosceles triangle or an equilateral triangle, and the central axis of the water outlet passage passes through the outer center of the first triangle.

25. The single plunger piston pump as in claim 22, wherein: the pump body is provided with a plurality of water outlet channels, the plurality of water outlet channels are arranged in the pump body, water in the pressurizing cavity flows out of the pressurizing cavity in a multi-path mode through the plurality of water outlet channels, the plurality of water outlet channels comprise a first water outlet channel, a second water outlet channel and a third water outlet channel, a second triangle is formed by connecting the central axis of the first water outlet channel, the central axis of the second water outlet channel and the central axis of the third water outlet channel with three intersection points of the first plane, and the second triangle is located in the first triangle.

26. The single plunger piston pump as in claim 25, wherein: the second triangle is an isosceles triangle or an equilateral triangle, and the central axis of the plunger penetrates through the outer center of the second triangle.

27. The single plunger piston pump as in claim 25, wherein: the second triangle is an isosceles triangle or an equilateral triangle, and the central axis of the water outlet pipe penetrates through the outer center of the second triangle.

28. The single plunger piston pump as in claim 25, wherein: the central axis of the first water outlet channel, the central axis of the first water inlet channel and the central axis of the plunger are coplanar, the central axis of the second water outlet channel, the central axis of the second water inlet channel and the central axis of the plunger are coplanar, and the central axis of the third water outlet channel, the central axis of the third water inlet channel and the central axis of the plunger are coplanar.

29. The single plunger type plunger pump of claim 3, wherein: the water inlet check valves are arranged in the corresponding water inlet channels and used for opening and closing the corresponding water inlet channels, and the water outlet check valves are arranged in the corresponding water outlet channels and used for opening and closing the corresponding water outlet channels.

30. The single plunger piston pump as in claim 22, wherein: the gear transmission mechanism is positioned in the gear box and comprises a connecting rod movably connected to the plunger and a crankshaft driving the connecting rod, the connecting rod and the plunger are accommodated in a space formed by the first cover body and the second cover body in an enclosing mode, and the crankshaft is accommodated in a space formed by the first cover body and the gear box in an enclosing mode.

31. The single plunger piston pump as in claim 22, wherein: the plunger pump is characterized by further comprising a stop valve assembled between the pump cover and the pump body, a water inlet passage formed in the pump cover, a pressurizing cavity formed in the pump body, a water inlet cavity formed between the pump cover and the pump body, and a water outlet cavity formed between the stop valve and the pump body, wherein the stop valve separates the water inlet cavity from the water outlet cavity, water outside the plunger pump enters the pressurizing cavity through the water inlet passage and the water inlet cavity in sequence, the front end of the plunger can move in the pressurizing cavity to pressurize the water in the pressurizing cavity, and the pressurized water flows out of the pump cover through the water outlet cavity, the stop valve and the water outlet passage in sequence.

32. The single plunger piston pump as in claim 31, wherein: the stop valve comprises a front end part arranged on the pump cover, a main body part arranged on the pump body and a through hole penetrating through the front end part and the main body part, and the water outlet passage is communicated with the water outlet cavity through the through hole.

33. The single plunger piston pump as in claim 32, wherein: the plunger pump is characterized by further comprising a plurality of water inlet channels and a plurality of water outlet channels which are arranged in the pump body, the water inlet chambers are communicated with the pressurizing chambers in a multi-way mode through the plurality of water inlet channels, the pressurizing chambers are communicated with the water outlet chambers in a multi-way mode through the plurality of water outlet channels, the number of the plurality of water inlet channels is three, the number of the plurality of water inlet channels is respectively a first water inlet channel, a second water inlet channel and a third water inlet channel, a third triangle is formed by connecting the central axis of the first water inlet channel, the central axis of the second water inlet channel and the central axis of the third water inlet channel with three intersection points of a second plane which is perpendicular to the central axis of the plunger, the third triangle is located in the outer contour line of the vertical projection of the stop valve on the second plane, and the second plane is set as the plane where any cross section of any water inlet channel which is perpendicular to the central axis.

34. The single plunger piston pump as in claim 33, wherein: the number of the water outlet channels is three, the water outlet channels are respectively a first water outlet channel, a second water outlet channel and a third water outlet channel, a connecting line of three intersection points of the central axis of the first water outlet channel, the central axis of the second water outlet channel and the central axis of the third water outlet channel and a third plane vertical to the central axis of the plunger piston is a fourth triangle, the vertical projection of the stop valve main body part on the third plane is located in the fourth triangle, and the third plane is set as a plane where any cross section vertical to the central axis of the plunger piston of any one water outlet channel is located.

35. The single plunger piston pump as in claim 32, wherein: the pump cover further comprises an annular flange, the front end portion of the stop valve is assembled into the annular flange, the front end portion of the stop valve and the annular flange are sealed through the second sealing ring, the third sealing ring is sleeved on the main body portion of the stop valve, the main body portion of the stop valve is assembled into the pump body, and the main body portion of the stop valve and the pump body are sealed through the third sealing ring.

36. The single plunger piston pump as in claim 22, wherein: the motor is located the crank link mechanism downside, the pivot perpendicular to plunger and the outlet pipe of motor, the axis of outlet pipe, the axis of motor shaft, the axis three coplane of plunger.

37. A hand-held cleaning machine characterized in that: comprising a single plunger piston pump according to any of claims 1 to 36.

38. The hand-held cleaning machine of claim 37, wherein: the cleaning machine comprises a handle for holding the cleaning machine in hand, a motor of the plunger pump is contained in the handle, a rotating shaft of the motor extends along the vertical direction, and the gravity center of the motor is located in the handle.

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