阅读说明：本技术 一种微型清洗机泵单元 (Miniature cleaning machine pump unit ) 是由 罗昌国 陈宇波 赵永胜 于 2020-06-19 设计创作，主要内容包括：本发明属于清洗设备的技术领域,具体涉及一种微型清洗机泵单元,包括电机和电机驱动的柱塞泵,所述电机的输出轴与主轴传动连接,所述主轴上设置有随主轴旋转的凸轮,凸轮的下方设置有柱塞机构,凸轮驱动柱塞机构于柱塞腔体内往复运动,所述柱塞机构的下端套设有复位弹簧,所述柱塞腔体上连接有进水腔体和出水腔体,所述柱塞腔体与进水腔体间设置有进水单向阀,柱塞腔体与出水腔体间设置有出水单向阀,所述进水腔体与进水口相连,出水腔体与出水口相连。本发明提供的微型清洗机泵单元,结构简单紧凑,重量轻巧,冲击振动小,整机效率高,适合于手持式或便携式清洁设备。(The invention belongs to the technical field of cleaning equipment, and particularly relates to a miniature cleaning machine pump unit which comprises a motor and a plunger pump driven by the motor, wherein an output shaft of the motor is in transmission connection with a main shaft, a cam rotating along with the main shaft is arranged on the main shaft, a plunger mechanism is arranged below the cam and drives the plunger mechanism to reciprocate in a plunger cavity, a reset spring is sleeved at the lower end of the plunger mechanism, a water inlet cavity and a water outlet cavity are connected onto the plunger cavity, a water inlet one-way valve is arranged between the plunger cavity and the water inlet cavity, a water outlet one-way valve is arranged between the plunger cavity and the water outlet cavity, the water inlet cavity is connected with a water inlet, and the water outlet cavity is connected with a water outlet. The miniature cleaning machine pump unit provided by the invention has the advantages of simple and compact structure, light weight, small impact vibration and high overall efficiency, and is suitable for handheld or portable cleaning equipment.)

1. A miniature cleaning machine pump unit comprises a motor (1) and a plunger pump driven by the motor (1), and is characterized in that an output shaft of the motor (1) is in transmission connection with a main shaft (2), a cam (3) rotating along with the main shaft (2) is arranged on the main shaft (2), a plunger mechanism (4) is arranged below the cam (3), the cam (3) drives the plunger mechanism (4) to reciprocate in a plunger cavity (5), a reset spring (6) is sleeved at the lower end of the plunger mechanism (4), a water inlet cavity (7) and a water outlet cavity (8) are connected onto the plunger cavity (5), a water inlet check valve (9) is arranged between the plunger cavity (5) and the water inlet cavity (7), a water outlet check valve (10) is arranged between the plunger cavity (5) and the water outlet cavity (8), and the water inlet cavity (7) is connected with a water inlet (11), the water outlet cavity (8) is connected with the water outlet (12).

2. The micro-washer pump unit as claimed in claim 1, characterized in that the output shaft of the motor (1) is drivingly connected to the main shaft (2) via a reduction gear set (13).

3. A micro-washer pump unit as claimed in claim 1, characterized in that the spindle (2) and the cam (3) are arranged in a central chamber (14), the front and rear ends of the spindle (2) being fitted in a first bearing (15) and a second bearing (16), respectively.

4. The micro-washer pump unit according to claim 1, characterized in that the plunger mechanism (4) comprises a plunger (17), a plunger stopper (18) and a roller bearing (19), the plunger stopper (18) is arranged in the plunger (17), a return spring (6) is arranged in the plunger cavity (5) and compressed on the lower end face of the plunger (17), the lower end of the return spring (6) is mounted on a spring seat in the plunger cavity (5), the roller bearing (19) is hinged on the upper end of the plunger (17) by a roller bearing pin (20), the roller bearing (19) presses on the radial contour surface of the cam (3), and the roller bearing (19) and the cam (3) are in rolling friction.

5. The miniature washer pump unit as defined in claim 1, wherein the plunger pump has a housing formed by fastening a pump body (21) and a pump cover (22), the pump body (21) has a lower end provided with an oil seal (23) or an O-ring, and the pump cover (22) has an upper end provided with a water seal (24).

6. Pump unit according to claim 5, characterized in that the pump body (21) is provided with anti-rotation pins (25) and in that the side walls of the plunger mechanism (4) are provided with anti-rotation slots cooperating with the anti-rotation pins (25).

7. The micro-washer pump unit as claimed in claim 1, wherein the contour shape of the cam (3) comprises a lift area and a return area, the lift area controls the compression motion trajectory law of the plunger (17), the return area controls the reset motion trajectory law of the plunger (17), and the shapes of the lift area and the return area are symmetrical or asymmetrical.

8. A micro-washer pump unit as claimed in claim 1, characterized in that the radial profile of the cam (3) is an eccentric circle or an archimedes spiral.

Technical Field

The invention belongs to the technical field of cleaning equipment, and particularly relates to a pump unit of a miniature cleaning machine.

Background

A mini-washer is a portable cleaning device that includes a cleaning action commonly used on automotive surfaces or other similar applications. The common structure of the device is that a pump unit is arranged in a shell, a water outlet of the pump unit is provided with a water outlet channel, and the tail end of the water outlet channel is provided with a nozzle. The working mode is that the motor drives the pump body to work, and the working water is pressurized by the pump body, passes through the water outlet joint and then is sprayed out from the nozzle by high-pressure water flow to carry out cleaning operation.

Chinese patent application CN110905750A discloses a hand-held cleaning machine, comprising a housing; a drive device; a pump; the pump includes first pump body, second pump body, water supply connector, goes out water swivel and plunger, and its innovation point lies in: the pump cavity on the first pump body is respectively communicated with the water inlet joint and the water outlet joint, the second pump body is fixedly connected with the first pump body, a plurality of plungers are mounted on the second pump body, the pump cavity corresponding to the plungers is arranged on the first pump body, the plungers act on the pump cavity corresponding to the first pump body through the second pump body by the driving device to do reciprocating motion, and at least one of the plungers is in a state of extruding the pump cavity; the battery pack is electrically connected with the driving device through the driving switch.

The above patent has disadvantages in that the pump unit is too complicated in structure, large in volume and weight, and not suitable for miniaturization of the washing machine.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a miniature cleaning machine pump unit which is simple and compact in structure, light in weight and small in impact vibration.

In order to solve the above technical problems, the object of the present invention is achieved by the following technical solutions:

the utility model provides a miniature cleaning machine pump unit, includes motor and motor drive's plunger pump, the output shaft and the spindle drive of motor are connected, be provided with on the main shaft along with the rotatory cam of main shaft, the below of cam is provided with plunger mechanism, and reciprocating motion in the plunger cavity is constructed to cam drive plunger, the lower pot head of plunger mechanism is equipped with reset spring, be connected with into water cavity and play water cavity on the plunger cavity, be provided with into water check valve between plunger cavity and the intake cavity, be provided with out water check valve between plunger cavity and the play water cavity, intake cavity links to each other with the water inlet, and it links to each other with the delivery port to go out the water cavity.

The compression movement of the plunger mechanism is driven by a cam and the return movement is driven by a return spring.

The output shaft of the motor is in transmission connection with the main shaft through a reduction gear set, and the motor drives the cam to rotate and pushes the plunger mechanism to reciprocate up and down after being reduced.

The main shaft and the cam are arranged in the central cavity, the main shaft and the cam are preferably of a split structure, the front end and the rear end of the main shaft are respectively assembled in the first bearing and the second bearing, and the first bearing and the second bearing are fixed on the bearing mounting seat of the central cavity.

The plunger mechanism comprises a plunger, a plunger plug and a roller bearing, wherein the plunger plug is arranged in the plunger, a reset spring is arranged in a plunger cavity and is compressed on the lower end face of the plunger, the lower end of the reset spring is arranged on a spring seat in the plunger cavity, the roller bearing is hinged to the upper end of the plunger through a roller bearing pin, the roller bearing is pressed on the radial profile surface of a cam, and the roller bearing and the cam are in rolling friction during driving.

Or, above-mentioned plunger mechanism includes plunger and plunger end cap, the plunger end cap sets up in the plunger, and reset spring sets up in the plunger cavity and compresses on the lower terminal surface of plunger, and reset spring's lower extreme is installed on the spring holder in the plunger cavity, the upper end and the cam contact of plunger are connected, sliding friction between the two during the drive, and the upper end of plunger sets up to flat top formula or tip formula.

The casing of above-mentioned plunger pump is formed by pump body and pump cover fastening connection, the lower extreme of the pump body is provided with oil blanket or O shape circle, the upper end of pump cover is provided with the water seal.

The pump body is provided with an anti-rotation pin, the side wall of the plunger mechanism is provided with an anti-rotation groove matched with the anti-rotation pin, and the anti-rotation pin slides in the anti-rotation groove when the plunger mechanism reciprocates up and down.

The contour line shape of the cam comprises a lift area and a return area, the lift area controls the compression motion track rule of the plunger, the return area controls the reset motion track rule of the plunger, and the shapes of the lift area and the return area are symmetrical or asymmetrical.

The radial contour line of the cam is an eccentric circle or an Archimedes spiral line, the reciprocating motion trajectory rule of the plunger is accurately controlled, and when the radial contour line of the cam is the Archimedes spiral line, the plunger mechanism reciprocates up and down at a constant speed.

The water inlet check valve and the water outlet check valve are selected from split check valves and combined check valves.

The plunger can be a hollow plunger or a solid plunger.

The micro-washer pump unit is used for a hand-held washer or a portable washer.

Compared with the prior art, the invention has the following beneficial effects:

1. the single-plunger pump designed by the invention has the advantages of simple and compact structure, light weight and small impact vibration, and is particularly suitable for being used in handheld cleaning machines and portable cleaning machines.

2. The invention uses the cam to drive the plunger, and the driving cam has a specific radial contour line shape to accurately control the reciprocating motion track rule of the plunger, further accurately control the instantaneous output flow and pressure of the pump unit, reduce the high-pressure water flow pulse and vibration, improve the efficiency of the whole machine, reduce the current consumption and prolong the service time.

3. The return spring designed by the invention is arranged at one end of the plunger far away from the cam, so that the size of the central chamber can be effectively reduced. The entire plunger roller bearing assembly can also be pressed on the cam through the pump body from one side of the pump cover, thereby reducing the assembly difficulty.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a schematic structural view of the cam roller bearing mechanism of the present invention;

FIG. 3 is a schematic diagram of a symmetrical cam of the present invention;

FIG. 4 is a schematic view of the asymmetric cam of the present invention;

FIG. 5 is a schematic structural view of an integrated spindle cam of the present invention;

FIG. 6 is a schematic structural view of the flat top plunger mechanism of the present invention;

FIG. 7 is a schematic structural view of the tip-type plunger mechanism of the present invention;

FIG. 8 is a schematic structural view of a split check valve of the present invention;

FIG. 9 is a schematic structural view of the combination check valve of the present invention;

FIG. 10 is a schematic structural view of a hollow plunger according to the present invention;

FIG. 11 is a schematic structural view of a solid plunger of the present invention;

reference numerals: 1. a motor; 2. a main shaft; 3. a cam; 4. a plunger mechanism; 5. a plunger cavity; 6. a return spring; 7. a water inlet cavity; 8. a water outlet cavity; 9. a water inlet one-way valve; 10. a water outlet one-way valve; 11. a water inlet; 12. a water outlet; 13. a reduction gear set; 14. a central chamber; 15. a first bearing; 16. a second bearing; 17. a plunger; 18. a plunger plug; 19. a roller bearing; 20. a roller bearing pin; 21. a pump body; 22. a pump cover; 23. oil sealing; 24. water sealing; 25. and (4) an anti-rotation pin.

Detailed Description

The invention is further described in the following with specific embodiments in conjunction with the accompanying drawings, see fig. 1-11:

the utility model provides a miniature cleaning machine pump unit, includes motor 1 and motor 1 driven plunger pump, the output shaft and the main shaft 2 transmission of motor 1 are connected, be provided with on the main shaft 2 along with the rotatory cam 3 of main shaft 2, the below of cam 3 is provided with plunger mechanism 4, and cam 3 drive plunger mechanism 4 is reciprocating motion in plunger cavity 5, the lower pot head of plunger mechanism 4 is equipped with reset spring 6, be connected with intake cavity 7 and play water cavity 8 on the plunger cavity 5, be provided with into water check valve 9 between plunger cavity 5 and intake cavity 7, be provided with out water check valve 10 between plunger cavity 5 and play water cavity 8, intake cavity 7 links to each other with water inlet 11, goes out water cavity 8 and links to each other with delivery port 12.

The working mode of the invention is as follows: the motor 1 drives the main shaft 2 to rotate after being decelerated by the transmission system, the cam 3 rotates along with the main shaft, the cam 3 drives the plunger mechanism 4 to do reciprocating linear motion in the plunger cavity 5, the compression motion of the plunger mechanism 5 is driven by the cam 3, the reset motion is driven by the reset spring 6, when the plunger mechanism 4 ascends, a vacuum degree is formed in the plunger cavity 5, the water inlet check valve 9 is communicated, the water outlet check valve 10 is closed, water in the water inlet cavity 7 enters the plunger cavity 5, when the plunger mechanism 4 descends, the pressure in the plunger cavity 5 is increased, the water inlet check valve 9 is closed, the water outlet check valve 10 is communicated, water in the plunger cavity 5 enters the water outlet cavity 8 and is sprayed out from the water outlet 12 to form high-pressure water flow. The above operation is then repeated as the cam 3 rotates.

The output shaft of the motor 1 is in transmission connection with the main shaft 2 through a reduction gear set 13, and the motor 1 drives the cam 3 to rotate and push the plunger mechanism 4 to reciprocate up and down after reducing the speed.

The mounting structure of the main shaft 2 and the cam 3 is as follows: the main shaft 2 and the cam 3 are arranged in the central cavity 14, the front end and the rear end of the main shaft 2 are respectively assembled in a first bearing 15 and a second bearing 16, and the first bearing 15 and the second bearing 16 are fixed on a bearing mounting seat of the central cavity 14.

The main shaft 2 and the cam 3 are preferably in a split structure in comparison with fig. 2, and another example is in an integral main shaft cam structure in comparison with fig. 5.

Referring to fig. 3 and 4, the contour shape of the cam 3 includes a lift area and a return area, the lift area controls the compression motion trajectory rule of the plunger 17, the return area controls the reset motion trajectory rule of the plunger 17, and the lift area and the return area are symmetrical (as shown in fig. 3) or asymmetrical (as shown in fig. 4).

The radial contour line of the cam 3 is an eccentric circle or an Archimedes spiral line, the reciprocating motion trajectory rule of the plunger 17 is accurately controlled, and when the radial contour line of the cam 3 is the Archimedes spiral line, the plunger 17 reciprocates up and down at a constant speed.