WO2023011590A1 - Pompe à piston et machine de nettoyage à haute pression manuelle - Google Patents

Pompe à piston et machine de nettoyage à haute pression manuelle Download PDF

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Publication number
WO2023011590A1
WO2023011590A1 PCT/CN2022/110274 CN2022110274W WO2023011590A1 WO 2023011590 A1 WO2023011590 A1 WO 2023011590A1 CN 2022110274 W CN2022110274 W CN 2022110274W WO 2023011590 A1 WO2023011590 A1 WO 2023011590A1
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WO
WIPO (PCT)
Prior art keywords
plunger
pressure
pump body
hand
water inlet
Prior art date
Application number
PCT/CN2022/110274
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English (en)
Chinese (zh)
Inventor
郝云
查霞红
赵凤丽
周杰
Original Assignee
苏州宝时得电动工具有限公司
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Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2023011590A1 publication Critical patent/WO2023011590A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections

Definitions

  • the invention relates to the technical field of cleaning equipment, in particular to a plunger pump and a hand-held high-pressure cleaner.
  • the hand-held cleaning machine As a cleaning device, are more and more widely used in people's lives, bringing great convenience to people's lives.
  • the hand-held cleaning machine can be used to clean cars, glass doors and windows, garden roads, swimming pools, pets, etc. It is efficient, safe and easy to use.
  • the core module of the existing hand-held cleaning machine is the core pump, including the plunger pump, transmission mechanism and motor.
  • the water inlet valve of the water inlet channel is set along the water inlet direction, and the valve core of the water inlet valve is affected by the pressure water and the large spring force, so that the operating force required to pull the valve core through the trigger is relatively large;
  • the plunger bearings of existing single plunger motor pumps use deep groove ball bearings, as shown in Figures 1, 3, and 5.
  • the selected deep groove ball bearings are larger in size, so that the entire The overall size of the pump body is too large and the weight is increased;
  • the pump body cavity of the existing motor pump is a closed cavity. After the machine runs for a long time, the water particles on the surface of the plunger will accumulate in the pump body cavity. When it is made of steel, it is easy to rust when exposed to water, which will damage the bearing and reduce the life of the bearing;
  • the existing motors and pump motors are all internal rotor motors, which are large in size and heavy in weight, which increases the volume and weight of the hand-held washing machine;
  • the pump body, pump cover, gear box and pump head of the existing motor pump are made of aluminum die-casting material when the pressure is above 3MPa, which is high in cost and heavy in weight, and post-processing is required after the aluminum parts are die-casted, so the cost is higher.
  • the water inlet channel and the pressure relief valve of the high-pressure cleaner are set on the same channel. As shown in Figure 1, the pressure relief valve is partly located in the water inlet channel, forming water inlet resistance, which cannot meet the demand for a large flow rate of 300L/h.
  • the object of the present invention is to provide a plunger pump and a hand-held high-pressure cleaner with high efficiency, small size, light weight and high operating comfort.
  • the present invention adopts following technical scheme:
  • a hand-held high-pressure cleaning machine including a main body of the whole machine, the main body of the whole machine includes a pump body, a motor and a transmission mechanism;
  • the motor is connected to the pump body through a transmission mechanism to drive the pump body to run;
  • the pump body is a plunger pump body, including a high-pressure chamber, a plunger, a water inlet channel and a water outlet channel.
  • the plunger can reciprocate relative to the high-pressure chamber to pressurize the water flow.
  • the water inlet channel and the water outlet channel are respectively connected with the high-pressure chamber;
  • the rated pressure output by the pump body is 3-7Mpa, the size of the motor in the axial direction of its power output shaft, the size of the pump body in the direction of its plunger extension, and the width and height of the transmission mechanism
  • the product of the smaller size is 190-230cm 3 .
  • main body of the whole machine also includes a casing, and the motor, transmission mechanism and pump body are installed in the casing;
  • the shell is formed with a gun barrel interface for connecting the water outlet gun tube at the front end of the water outlet channel of the pump body;
  • the main body of the complete machine is configured as follows: in the axial direction of the power output shaft of the motor, the ratio of the length from the rear edge of the motor to the front edge of the plunger to the length from the rear edge of the shell to the front edge of the barrel interface is 0.2-0.35.
  • the motor is configured as an outer rotor brushless motor with a length of 42-55 mm.
  • the dimension of the pump body in the extending direction of the plunger is 75-109.5mm.
  • the high-pressure chamber includes a first high-pressure chamber and a second high-pressure chamber respectively matched with the two ends of the plunger;
  • the transmission mechanism includes an eccentric shaft, and the input end of the eccentric shaft is connected to the motor power.
  • the output shaft is connected by transmission, the output end of the eccentric shaft is connected to the plunger in rotation, and the eccentricity of the eccentric shaft is 3-6 mm; the transmission mechanism converts the rotational motion of the motor into the linear reciprocating motion of the plunger so that the plunger is alternately compressed or released
  • the first and second high pressure chambers are examples of the motor.
  • the transmission mechanism includes an eccentric shaft, the input end of the eccentric shaft is connected to the power output shaft of the motor, a groove is provided in the middle of the plunger for connecting the output end of the eccentric shaft, and the output end of the eccentric shaft is at least partially accommodated in the groove And it is rotationally connected with the plunger through a plunger bearing, and the plunger bearing adopts a needle bearing.
  • outer sidewall of the needle bearing or the inner sidewall of the groove is configured such that the gap between the needle bearing and the groove is larger at both ends in the axial direction than in the middle.
  • the depth of the groove in the axial direction of the plunger bearing is not less than 1/2 of the diameter of the plunger.
  • the plunger of the pump body is arranged in the horizontal direction and is perpendicular to the axis of the power output shaft of the motor.
  • the transmission mechanism is a gear box, and the smaller of the width and height of the gear box is 50-55 mm.
  • the diameter of the plunger is 10-16mm
  • the size of the pump body is 40.5-68.5mm perpendicular to the extending direction of the plunger and perpendicular to the axial direction of the power output shaft of the motor.
  • the flow rate of the pump body is 180-300L/h.
  • a pressure relief channel for connecting the water inlet channel and the water outlet channel is provided between the water inlet channel and the water outlet channel, the pressure relief channel and the water inlet channel are independently arranged and arranged side by side, and the pressure relief channel is provided with a pressure relief channel.
  • the pressure relief device includes a pressure relief valve plate and a first elastic member connected to and acting on the pressure relief valve plate, the pressure of the water outlet channel acts on the pressure relief device, so that the pressure relief valve plate closes and opens the pressure relief channel Switch between states.
  • the high pressure chamber has a water inlet of the high pressure chamber and a water outlet of the high pressure chamber, the water inlet channel is connected with the water inlet of the high pressure chamber through the water inlet check valve, and the water outlet channel is connected with the high pressure chamber through the water outlet check valve.
  • the water outlet is connected, and the cross-sectional area of the flow path between the water inlet check valve and the water inlet of the high-pressure chamber is not less than 35mm 2 .
  • the water inlet channel is provided with a water inlet valve, and the water inlet channel includes a water inlet section before the valve and a water outlet section after the valve, which are respectively arranged on both sides of the water inlet valve;
  • the water inlet valve includes a valve core arranged radially along the water inlet channel, a valve seat and a second elastic member, the valve seat has a cavity communicating with the water inlet section of the valve and the water outlet section after the valve, the valve core
  • the guiding movement is set in the cavity and has a control end.
  • the outer wall of the valve core is formed with a sealing section and a water tank.
  • the second elastic member acts on the valve core to make the valve core reset automatically when there is no external force at the control end.
  • the water-passing groove has an up-and-down symmetrical structure along the extending direction of the valve core, so that the force of the water pressure on the upper and lower sides of the water-passing groove is equal in magnitude and opposite in direction.
  • the transmission mechanism includes an eccentric shaft, the output end of the eccentric shaft is rotationally connected to the plunger through a plunger bearing, the pump body is formed with a bearing chamber for accommodating the plunger bearing, and a communication channel is opened on the pump body. Drain holes inside the bearing chamber and outside the pump body.
  • the pump body includes a pump casing
  • the transmission mechanism includes a transmission support mechanism
  • both the pump casing and the transmission support mechanism are made of plastic material.
  • the transmission mechanism is configured as a planetary gear transmission structure, including a planet carrier, a planetary gear set, an eccentric shaft, a bearing and a bearing positioning bracket, and the input and output ends of the eccentric shaft are respectively provided with bearings, and the bearings are installed On the bearing positioning bracket, the planetary gear set is rotatably mounted on the planetary bracket through the pin shaft, and the planetary bracket, the pin shaft, the eccentric shaft, the bearing and the bearing positioning bracket are connected by interference fit.
  • a planetary gear transmission structure including a planet carrier, a planetary gear set, an eccentric shaft, a bearing and a bearing positioning bracket, and the input and output ends of the eccentric shaft are respectively provided with bearings, and the bearings are installed On the bearing positioning bracket, the planetary gear set is rotatably mounted on the planetary bracket through the pin shaft, and the planetary bracket, the pin shaft, the eccentric shaft, the bearing and the bearing positioning bracket are connected by interference fit.
  • a hand-held high-pressure cleaning machine comprising a hand-held spray gun housing, a pump body, a transmission mechanism and a motor arranged in the hand-held spray gun housing;
  • the housing of the hand-held spray gun is formed with a water flow nozzle
  • the pump body includes a high-pressure chamber, a plunger, a water inlet channel and a water outlet channel.
  • the plunger can reciprocate relative to the high-pressure chamber to pressurize the water flow.
  • the water inlet channel and the water outlet channel are respectively connected to the high-pressure chamber.
  • the chambers are connected, and the water outlet channel is connected with the water flow nozzle;
  • the transmission mechanism includes a reducer, the motor is connected through the reducer and drives the plunger to reciprocate relative to the high-pressure chamber;
  • the motor is configured as an outer rotor brushless motor, the size of the motor in the axial direction of its power output shaft is 42-55mm, and the size from the rear edge of the motor to the front edge of the plunger in the axial direction of the motor power output shaft is 95mm ⁇ 110mm.
  • a plunger pump comprising:
  • the pump body includes a high-pressure chamber, a plunger, a water inlet channel and a water outlet channel.
  • the plunger can reciprocate relative to the high-pressure chamber to pressurize the water flow.
  • the water inlet channel and the water outlet channel are respectively connected to the high-pressure chamber. Connected;
  • the driving part outputs the rotational driving force through the power output shaft
  • the rated pressure output by the pump body is 3-7MPa
  • at least part of the cross-section of the pump body is cut by a plane passing through the plunger and perpendicular to the axial direction of the power output shaft of the drive member
  • the area is 33.6-59.6 cm 2 .
  • the input end of the eccentric shaft and the power output shaft of the driving member are arranged in parallel and on different axes, and the input end of the eccentric shaft and the power output shaft of the driving member have mutual interference sections in the axial direction , which is used to connect the input end of the eccentric shaft with the power output shaft of the driving member through the transmission assembly arranged in the radial plane.
  • the present invention rationally sets the pump body width, height, cross-sectional area, plunger diameter, eccentric wheelbase, motor length, transmission mechanism size and other parameters; , the output end of the eccentric shaft is housed in the groove of the plunger and the depth of the groove is not less than 1/2 of the diameter of the plunger, the input end of the eccentric shaft and the power output shaft of the motor are arranged on different axes Clothed transmission components transmission connection and other technical means; under the premise of satisfying the performance of the whole machine, the volume and weight of the plunger pump and the whole machine can be minimized; in addition, by increasing the water inlet check valve and the high-pressure chamber The cross-sectional area of the flow channel between the water inlets, the pressure relief channel and the water inlet channel are independently arranged and distributed side by side, which can effectively increase the flow rate of the pump body; thus, the pressure of the plunger pump can be increased to above 3Mpa and the flow rate can be increased to 180-300L/h, effectively reducing the volume of the plunger pump, realizing the
  • the plunger bearing of the present invention uses needle bearings, which are small in diameter and light in weight. Under the premise of satisfying the performance strength, the machine is minimized and the weight is minimized; in addition, through the cooperation between the needle bearing and the groove The surface is set so that the gap at both ends is greater than that in the middle, which can avoid the force on the end of the bearing; at the same time, by setting a drainage hole at the bearing cavity of the pump body, the water collected in the pump body cavity can be discharged, avoiding damage and failure of the plunger bearing, and improving product life. and reliability.
  • the water inlet valve of the present invention is arranged perpendicular to the water inlet direction, and the on-off of the water flow is controlled through the radial seal between the valve core and the valve seat, which can reduce the axial force of the water pressure on the valve core; at the same time, through Set the water tank as an up-and-down symmetrical structure along the extension direction of the valve core.
  • the force of the water pressure on the upper and lower sides of the water tank is equal in size and opposite in direction, and cancels each other out. Therefore, when the valve core is pulled, the water pressure has no resistance to the axial direction of the valve core.
  • the pump casing of the pump body of the present invention and the transmission support mechanism of the transmission mechanism are all made of plastic materials, so that the machine is the smallest, the weight is the lightest, and the cost is the lowest under the premise of satisfying product performance and life.
  • the planetary support, pin shaft, eccentric shaft, bearing and bearing positioning support of the present invention are connected by interference fit, the structure is simple, and the parts can be processed independently, which significantly simplifies the processing of transmission shafts, planetary support and other parts technology, which can effectively reduce the overall cost.
  • the present invention can reduce the size of the pump body in the direction of the extension of the plunger, and furthermore, the plunger can be arranged horizontally, so that the whole machine is left and right symmetrical, and the appearance is more coordinated and beautiful.
  • Fig. 1 is the sectional view of the single plunger pump of pressure 2.2MPa and flow rate 120L/h in the prior art
  • Fig. 2 is a top view of a single plunger pump with a pressure of 2.2MPa and a flow rate of 120L/h in Fig. 1;
  • Fig. 3 is a sectional view of a single plunger pump with a pressure of 2.4MPa and a flow rate of 210L/h in the prior art;
  • Fig. 4 is a top view of a single plunger pump with a pressure of 2.4MPa and a flow rate of 210L/h in Fig. 3;
  • Fig. 5 is a sectional view of a single plunger pump with a pressure of 5 MPa and a flow rate of 250 L/h in the prior art
  • Fig. 6 is a top view of a single plunger pump with a pressure of 5 MPa and a flow rate of 250 L/h in Fig. 5;
  • Fig. 7 is a cross-sectional view of a three-piston axial pump with a pressure of 3 MPa and a flow rate of 250 L/h in the prior art;
  • Fig. 8 is a top view of a three-piston axial pump with a pressure of 3 MPa and a flow rate of 250 L/h in Fig. 7;
  • Fig. 9 is a right view of the overall structure of the hand-held high-pressure cleaner according to the first embodiment of the present invention.
  • Fig. 10 is a sectional view of the main body of the complete machine according to the first embodiment of the present invention.
  • Fig. 11 is a cross-sectional view of the top structure of the plunger pump according to the first embodiment of the present invention.
  • Fig. 12 is a bottom view of the plunger pump according to the first embodiment of the present invention.
  • Fig. 13 is a rear view of part of the structure of the plunger pump according to the first embodiment of the present invention, in which the rear view structure of the gear box is shown;
  • FIG. 14 is a perspective view of the overall structure of the plunger pump according to the first embodiment of the present invention.
  • Fig. 15 is a perspective view of the exploded structure of the plunger pump according to the first embodiment of the present invention.
  • Fig. 16 is a front structural sectional view of the plunger pump according to the first embodiment of the present invention.
  • Fig. 17 is a cross-sectional view of the installation structure of the water inlet valve on the water inlet channel according to the first embodiment of the present invention, showing the working state when the water channel of the water inlet channel is disconnected;
  • Fig. 18 is a cross-sectional view of the installation structure of the water inlet valve on the water inlet channel according to the first embodiment of the present invention, which shows the working state of the water inlet channel when the waterway is connected;
  • Fig. 19 is a cross-sectional view of the installation structure connecting the transmission mechanism with the motor and the plunger according to the first embodiment of the present invention
  • Fig. 20 is an exploded perspective view of the transmission mechanism of the first embodiment of the present invention.
  • Fig. 21 is a partial structural sectional view of the plunger pump according to the first embodiment of the present invention, showing the connection structure between the plunger and the eccentric shaft;
  • Fig. 22 is a cross-sectional view of the needle bearing of the first embodiment of the present invention.
  • Fig. 23 is a left structural cross-sectional view of the plunger pump according to the first embodiment of the present invention, showing the drain hole structure;
  • Fig. 24 is a left view of the overall structure of the hand-held washing machine according to the second embodiment of the present invention.
  • Fig. 25 is a top view of a plunger pump according to a second embodiment of the present invention.
  • Fig. 26 is a left structural sectional view of the plunger pump according to the second embodiment of the present invention.
  • Fig. 27 is a sectional view of the three-dimensional structure of the plunger pump according to the second embodiment of the present invention.
  • Fig. 28 is a sectional view of the partial structure of the plunger pump according to the third embodiment of the present invention, showing the matching structure between the groove of the plunger and the needle bearing;
  • Fig. 29 is a cross-sectional view of the partial structure of the plunger pump according to the fourth embodiment of the present invention, which shows the matching structure between the groove of the plunger and the needle bearing.
  • Sealing section 3513. Water tank, 352. Valve seat, 353. Second elastic part, 354. Guide sleeve, 355. latch, 361. first seal, 362. second seal, 371. first guide sleeve, 372. second guide sleeve, 381. bearing cavity, 382. drainage hole.
  • the hand-held high-pressure cleaner includes a main body of the whole machine and a water outlet gun barrel 1 .
  • the main body of the whole machine includes a casing 2 and a plunger pump 3.
  • the plunger pump 3 includes a pump body 31, a motor 32 and a transmission mechanism 33.
  • the motor 32, the transmission mechanism 33 and the pump body 31 are installed in the casing 2.
  • the mechanism 33 is connected with the pump body 31 for driving the pump body 31 to run.
  • the pump body 31 is a plunger pump body, including a high pressure chamber 315 , a plunger 316 , a water inlet channel 317 and a water outlet channel 318 .
  • the high-pressure chamber 315 includes a first high-pressure chamber 3151 and a second high-pressure chamber 3152 respectively matched with two ends of the plunger 316 .
  • the plunger 316 can reciprocate relative to the first high-pressure chamber 3151 and the second high-pressure chamber 3152 to pressurize the water flow.
  • the water inlet channel 317 and the water outlet channel 318 communicate with the first high pressure chamber 3151 and the second high pressure chamber 3152 respectively.
  • the outer end of the water inlet channel 317 forms a water inlet 3171
  • the outer end of the water outlet channel 318 forms a water outlet 3181
  • the water inlet 3171 is used to connect to an external water source
  • the water outlet 3181 is used to connect to the water outlet barrel 1
  • the housing 2 is formed with a gun barrel interface 21 for connecting the water outlet gun barrel 1 at the front end of the water outlet 3181 of the pump body 31 , and the water outlet gun barrel 1 is connected to the gun barrel interface 21 .
  • the shell 2 and the water outlet gun tube 1 form a hand-held spray gun housing of a hand-held high-pressure cleaner.
  • the outer end of the water outlet gun tube 1 forms a water flow nozzle.
  • the water outlet channel 318 is in communication with the water flow nozzle.
  • the rated pressure output by the pump body 31 is 3-7Mpa, and the flow rate of the pump body is 180-300L/h.
  • the product of the size of the motor 32 in the axial direction of the power output shaft, the size of the pump body 31 in the direction of the extension of the plunger 316 and the width and height of the transmission mechanism, whichever is smaller, is 190-230 cm 3 .
  • the size of the motor 32 in the axial direction of its power output shaft is the main dimension that affects the overall size of the motor
  • the size of the pump body 31 in the extending direction of its plunger 316 is the main dimension that affects the overall size of the pump body
  • the transmission mechanism 33 is Gearbox, the gearbox includes a reducer, the smaller of the width and height of the gearbox corresponds to the diameter of the gearbox disc structure, due to the flexible design of the surrounding installation structure, this size is the main dimension that determines the overall size of the gearbox
  • the above-mentioned three dimensions determine the overall size of the motor 32, the pump body 31 and the gear box respectively, and jointly affect the overall size of the plunger pump 3.
  • the pump body 31 is at least 70 in the cross-section of the plane passing through the plunger 316 and perpendicular to the axial direction of the power output shaft of the motor (that is, the plane formed by the direction b and the direction c in FIGS.
  • the % cross-sectional area is 33.6-59.6 cm 2 .
  • the motor 32 is an outer rotor brushless motor, the rotating speed of the motor 32 is 10000r/min-30000r/min, and the motor 32 is in the axial direction of its power output shaft (that is, as shown in Fig. 11 and Fig.
  • the length L3 is 42-55mm;
  • the plunger 316 of the pump body 31 is arranged in the horizontal direction, and is perpendicular to the axial direction of the power output shaft of the motor 32, and the pump body 31 is in its
  • the size of the plunger 316 in the direction of extension corresponds to the width of the pump body 31, the width of the pump body 31 is greater than the height of the pump body 31, and the width W of the pump body is 75 -109.5mm, the height H of the pump body is 40.5-68.5mm, and the height of the pump body is the size of the pump body in the direction indicated by c in Figure 9 and Figure 13; the height of the gear box is less than the width, and the gear box
  • the height E is 50-55mm, and the height of the gearbox is the size of the gearbox in the direction indicated by c in Fig. 9 and Fig. 13 .
  • the main body of the whole machine is configured as follows: in the axial direction of the power output shaft of the motor 32 (that is, in the direction shown by a in Fig. 9 and Fig. 11), the rear edge of the motor 32
  • the ratio of the length L1 to the front edge of the plunger 316 and the length L2 from the rear edge of the casing 2 to the front edge of the barrel interface 21 is 0.2-0.35; wherein: the length L1 from the rear edge of the motor 32 to the front edge of the plunger 316 is 95 -110mm, the length L2 from the rear edge of the casing 2 to the front edge of the barrel interface 21 is 320-340mm.
  • the rated pressure output by the pump body 31 is 3-6MPa
  • the flow rate is 180-220L/h
  • the length L3 of the motor 32 is 42-50mm
  • the width W of the pump body 31 is 75-80mm
  • the height of the gear box is E 50-55mm.
  • the length L1 from the rear edge of the motor 32 to the front edge of the plunger 316 is 95-105mm
  • the length L2 from the rear edge of the casing 2 to the front edge of the barrel interface 21 is 325- 335mm
  • the length L4 after the overall main body is connected to the water gun tube 1 is 800-900mm.
  • the transmission mechanism 33 includes an eccentric shaft 332, and a groove 3161 for connecting the eccentric shaft 332 is provided in the middle of the plunger 316, and the depth of the groove 3161 is not less than 1/2 of the diameter of the plunger.
  • the input end 3321 of the eccentric shaft is in drive connection with the power output shaft of the motor 32
  • the output end 3322 of the eccentric shaft is at least partially accommodated in the groove 3161 and is rotationally connected with the plunger 316 through the plunger bearing 336 .
  • the transmission mechanism 33 converts the rotational motion of the motor 32 into the linear reciprocating motion of the plunger 316 .
  • the diameter of the plunger 316 is 10-16mm, and the eccentricity of the eccentric shaft 332 is 3-6mm.
  • the diameter of the plunger 316 is 10-14mm, the eccentricity of the eccentric shaft 332 is 3-4.5mm, the stroke of the plunger 316 is 7-8mm; the speed of the motor 32 is 15000-20000r/ min, the transmission ratio is 7-8, and the volumetric efficiency is 80-90%.
  • the pump body 31 also includes a pump body 311, a pump head 312, a left pump cover 313, a right pump cover 314 and an inlet pipe fitting 3110, and the pump body 311 is connected with the pump head 312 respectively.
  • the left pump cover 313 and the right pump cover 314 are connected, and the first high-pressure chamber 3151 and the second high-pressure chamber 3152 are formed between the pump body 311, the left pump cover 313, the right pump cover 314 and the plunger 316,
  • the water outlet channel 318 is formed between the pump body 311 and the pump head 312
  • the water inlet channel 317 is formed between the pump body 311 and the water inlet pipe 3110
  • a plunger cavity for accommodating the plunger 316 is also formed in the pump body 311 319.
  • Both the first high-pressure chamber 3151 and the second high-pressure chamber 3152 have a water inlet of the high-pressure chamber and a water outlet of the high-pressure chamber.
  • the high-pressure chamber water inlets of the two high-pressure chambers 3152 are connected, and the water outlet channel 318 is respectively connected with the high-pressure chamber water outlets of the first high-pressure chamber 3151 and the second high-pressure chamber 3152 through the water outlet check valve 3182 .
  • the water inlet check valve 3172 can be opened, raised and closed as the water pressure in the high pressure chamber 315 decreases.
  • the water outlet check valve 3182 can be closed and opened as the water pressure in the high pressure chamber 315 decreases and rises.
  • the cross-sectional area of the flow path between the water inlet check valve and the water inlet of the high-pressure chamber is about 19 mm 2 , which is relatively small, which limits the liquid water entering the high-pressure chamber through the water inlet check valve. speed.
  • the cross-sectional area of the flow channel between the water inlet check valve 3172 and the water inlet of the high-pressure chamber is not less than 35 mm 2 , which can increase the water inlet flow.
  • the specific structure and installation method of the water inlet check valve 3172 and the water outlet check valve 3182 are prior art, and will not be repeated here.
  • the water inlet check valve 3172 and the water outlet check valve 3182 can be formed by connecting a section of spring and a valve body, and the valve body is connected to the end of the spring, but it is not limited thereto.
  • the plunger 316 reciprocates between a first position and a second position, the first position is the extreme position where the plunger 316 moves toward the first high pressure chamber 3151, and the second position is the plunger 316 moves toward the second The limit position of high pressure chamber 3152 direction movement.
  • the plunger 316 moves from the first position to the second position, the volume of the first high-pressure chamber 3151 gradually increases, and the water pressure drops.
  • the water inlet check valve 3172 corresponding to the first high-pressure chamber 3151 opens, and the water outlet The one-way valve 3182 is closed, and the liquid water flows into the first high-pressure chamber 3151 from the water inlet channel 317; at the same time, the volume of the second high-pressure chamber 3152 gradually decreases, and the liquid water in the second high-pressure chamber 3152 is pressurized.
  • the water inlet check valve 3172 corresponding to the second high pressure chamber 3152 is closed, the water outlet check valve 3182 is opened, and the liquid water flows out from the second high pressure chamber 3152 to the water outlet channel 318 .
  • liquid water flows out from the first high-pressure chamber 3151 to the water outlet channel 318, flows into the second high-pressure chamber 3152 from the water inlet channel 317; and so on.
  • the plunger 316 alternately compresses or releases the first high-pressure chamber 3151 and the second high-pressure chamber 3152, and the water sequentially passes through the water inlet channel 317, the first high-pressure chamber 3151 or the second high-pressure chamber 3152, and the water outlet channel 318, finally forming a high pressure
  • the water flow is sprayed out by the water outlet gun tube 1 of the hand-held washing machine for cleaning operations.
  • a pressure relief device connected to the water inlet channel and the water outlet channel is provided, which is used to release the pressure when the pressure in the water outlet channel is too high, so as to improve the safety performance of the plunger pump.
  • the pressure relief device is at least partly located at the inlet In the water channel, water inlet resistance is formed, so it cannot meet the large flow demand of the plunger pump.
  • the pressure channel 341 and the water inlet channel 317 are independently arranged and distributed side by side in parallel, and a pressure relief device 342 is provided in the pressure relief channel 341 .
  • the pressure relief device 342 includes a pressure relief valve plate 3421 and a first elastic member 3422 connected to and acting on the pressure relief valve plate 3421.
  • the pressure of the water outlet channel 318 acts on the pressure relief device 342, so that the pressure relief valve plate 3421 is closed and opened.
  • the states of the pressure relief channel 341 are switched.
  • the first elastic member 3422 is a spring.
  • the structures of the pressure relief device 342 and the first elastic member 3422 are not limited thereto.
  • the water inlet channel 317 is provided with a water inlet valve 35, and the water inlet channel 317 includes a water inlet section 3173 and a water outlet section 3174 located on both sides of the water inlet valve 35;
  • the water valve 35 includes a valve core 351 radially arranged along the water inlet channel 317, a valve seat 352, a second elastic member 353, a guide sleeve 354 and a bolt 355.
  • the cavity connected to the section 3174, the valve core 351 is set in the cavity for guiding movement and has a control end 3511, and the control end 3511 is connected and linked with the trigger 24 of the hand-held high-pressure cleaner.
  • the outer wall of the spool 351 is formed with a sealing section 3512 and a water-passing groove 3513.
  • the second elastic member 353 acts on the spool 351 to make the spool 351 reset automatically when there is no external force at the control end 3511, and the valve is controlled through the control end 3511.
  • the core 351 moves relative to the valve seat 352, so that the water section 3173 before the valve and the water outlet section 3174 after the valve are connected through the water tank 3513 or sealed by the sealing section 3512, thereby controlling the gap between the water section 3173 before the valve and the water outlet section 3174 after the valve The continuity of the waterway.
  • the water passing groove 3513 has a symmetrical structure up and down along the extending direction of the valve core 351 , so that the force of water pressure on the upper and lower sides of the water passing groove 3513 is equal in magnitude and opposite in direction.
  • the guide sleeve 354 is installed in the cavity of the valve seat 352, and the outside is limited by the latch 355 to prevent it from coming out. play a guiding role.
  • the second elastic member 353 is a spring. As shown in Figure 17, when the spool 351 is in the initial position, the water pressure acts on the spool 351 to pass through the water tank 3513.
  • the upper and lower forces are equal in magnitude and opposite in direction, and cancel each other out, so that when the spool 351 is pulled As shown in Figure 18, when the spool 351 is opened, the flow path is opened, and the water pressure still has no resistance to the axial direction of the spool 351. At this time, the trigger 24 is released, and the spool 351 will be on the second elastic member 353 Return to the initial position under the force of the spring. In this process, when the trigger 24 is pulled to pull the spool 351, only the spring force and the frictional force need to be overcome, and it is not hindered by the water pressure, so that the operation is more labor-saving and the comfort of the product can be improved.
  • the structure of the water inlet valve 35 is applicable to any closing gun linkage device, not limited to the trigger 24 .
  • a first sealing member 361 and a second sealing member 362 are arranged in the plunger cavity 319, and the first sealing member 361 and the plunger 316 form a first sealing structure to prevent liquid water in the first high-pressure chamber 3151 from entering into the In the space where the transmission mechanism 33 is located, the second sealing member 362 and the plunger 316 form a second sealing structure to prevent the liquid water in the second high-pressure chamber 3152 from entering the space where the transmission mechanism 33 is located, and prevent the internal parts of the transmission mechanism 33 from being rusted when exposed to water.
  • the first sealing member 361 and the second sealing member 362 may be structures such as sealing rings.
  • the inner wall of the plunger chamber 319 is formed with a first guide sleeve 371 on the side close to the first high-pressure chamber 3151, and a second guide sleeve 372 is formed on the side close to the second high-pressure chamber 3152.
  • the plunger 316 guides The movement is arranged between the first guide sleeve 371 and the second guide sleeve 372.
  • the first guide sleeve 371 and the second guide sleeve 372 are used to guide the plunger 316 to move between the first and second positions, so as to improve the movement of the plunger 316.
  • the wear of the plunger 316 during reciprocating motion can also be reduced.
  • the installation position of the guide sleeve is too close to the middle of the plunger, and the distance between the guide sleeve and the top end of the plunger is too large, which is not conducive to reducing the wear of the plunger, and the guide precision is not enough.
  • the first guide sleeve 371 is arranged close to the first high-pressure chamber 3151
  • the second guide sleeve 372 is arranged close to the second high-pressure chamber 3152 , so that the guiding precision can be improved and the wear of the plunger 316 can be reduced.
  • the motor 32 drives the plunger 316 to reciprocate through the eccentric shaft 332, pressurizing the liquid water in the first high-pressure chamber 3151 or the second high-pressure chamber 3152 at both ends of the plunger 316, and the water in the reciprocating process
  • the pressure reaction force causes the plunger bearing 336 between the eccentric shaft 332 and the plunger 316 to bear a large dynamic load.
  • the needle roller bearing is equipped with thin and long rollers (the length of the roller is 3-10 times the diameter, and the diameter is generally not more than 5mm), so the radial structure is compact, and its inner diameter size and load capacity are the same as other types of bearings. Minimum outside diameter. In order to reduce the volume of the plunger pump 3 , in this embodiment, as shown in FIG. 21 and FIG.
  • the plunger bearing 336 adopts a needle bearing, which is beneficial to reduce the length of the plunger 316 .
  • Needle bearings are used to achieve the same pressure of 3-7MPa, and the volume of the pump body 31 is 40-50% smaller than that of the pump body using ball bearings, achieving the effect of small volume and high load.
  • the mating surface between the plunger 316 and the output end 3322 of the eccentric shaft is a regular plane, the verticality of the pump body 31 is caused by the machining tolerance and assembly error of the pump body 31, as well as the wear of the pump body during long-term use.
  • the outer wall of the needle roller bearing is set so that the gap between the needle roller bearing and the groove 3161 is larger than the arc-shaped curved surface 3361 in the middle at both ends in the axial direction, so as to ensure that the needle roller bearing and the plunger 316 The mating surface of the needle bearing is centered to avoid wear on the tip of the needle roller bearing.
  • a sliding grinding sheet 339 is provided between the needle bearing and the second bearing 335, thereby reducing the friction on the end surface between the needle bearing and the second bearing 335, reducing the damage of the needle bearing caused by friction, and improving the rolling capacity. The service life of the needle bearing.
  • the pump body 31 is formed with a bearing cavity 381 for accommodating the plunger bearing 336 , and the pump body 31 is provided with a drainage hole 382 connecting the inside of the bearing cavity 381 and the outside of the pump body 31 at the bearing cavity 381 .
  • the plunger 316 is arranged horizontally
  • the drainage hole 382 is arranged at the bottom of the housing 2
  • the drainage hole 382 is arranged perpendicular to the plunger 316 .
  • the transmission mechanism 33 adopts a planetary gear transmission structure, including a planet carrier 331 , a planetary gear set, an eccentric shaft 332 , a bearing and a bearing positioning bracket 333 .
  • the eccentric shaft 332 includes an eccentric shaft input end 3321, an eccentric shaft output end 3322, and an intermediate connecting portion 3323 connected between the eccentric shaft input end 3321 and the eccentric shaft output end 3322 and coaxially arranged with the eccentric shaft input end 3321.
  • the shaft input end 3321, the intermediate connection portion 3323 and the eccentric shaft output end 3322 are respectively provided with a first bearing 334, a second bearing 335 and a plunger bearing 336 to position the eccentric shaft 332 in the pump body 31 relatively stably.
  • the first bearing 334 and the second bearing 335 are installed on the bearing positioning bracket 333, and the planetary gear set includes three planetary gears 337 meshed in sequence, and the three planetary gears 337 are rotatably mounted on the planetary bracket 331 through a pin shaft 338 .
  • the planet carrier 331 , the pin shaft 338 , the eccentric shaft 332 , the first bearing 334 , the second bearing 335 , the plunger bearing 336 and the bearing positioning bracket 333 are connected by interference fit.
  • the parts can be processed independently, which significantly simplifies the processing technology of transmission shafts, planetary supports and other parts, and can effectively reduce the overall cost.
  • the fixed sleeve at the outer end of the power output shaft of the motor 32 is provided with a sun gear 321.
  • the sun gear 321 is meshed with the first-stage planetary gear 337 in the planetary gear set, and the input end of the eccentric shaft is connected with the third-stage planetary gear 337 for synchronous rotation.
  • the pump body 31 includes a pump casing, which is formed by connecting the pump body 311, the pump head 312, the left pump cover 313, the right pump cover 314 and the water inlet pipe 3110;
  • the transmission mechanism includes a transmission support mechanism, including the The planetary bracket 331 and the bearing positioning bracket 333;
  • the pump casing of the pump body 31 and the transmission support mechanism of the transmission mechanism 33 are all made of plastic materials, and the machine is made the smallest and the weight is the smallest under the premise of satisfying product performance and life. Lightweight and lowest cost.
  • the weight of the bare metal does not exceed 2.2Kg.
  • the main body of the whole machine also includes a handle 22 formed on the casing 2 for holding, a switch part rotatably mounted on the casing 2 for opening and closing the hand-held high-pressure cleaner and configured on the casing 2 on the power supply unit 23 for power supply.
  • the handle 22 is located on the rear side of the housing 2, and the power supply unit 23 is arranged on the front side of the handle 22.
  • the power supply unit 23 is electrically connected to the motor 32 of the plunger pump 3, and there is also a device between the power supply unit 23 and the motor 32 to control the motor.
  • a contact switch (not shown) for starting or stopping, and at least part of a cable (not shown) for electrical connection are arranged inside the handle 22 .
  • the power supply unit 23 can be a battery pack or a power cord used to connect to the commercial power.
  • the switch part is arranged between the handle 22 and the power supply part 23 , and the switch part is linked with the valve core 351 of the water inlet valve 35 .
  • the power supply unit 23 is a battery pack, and the switch element is a trigger 24 .
  • the difference between the hand-held high-pressure cleaner of the second embodiment of the present invention and the first embodiment is that:
  • the water inlet valve 35 is not provided on the water inlet channel 317 in this embodiment.
  • the transmission mechanism 33 is an external meshing transmission structure.
  • the eccentric shaft input end 3321 is arranged in parallel with the power output shaft of the motor 32 and is located on different axes.
  • the transmission assembly arranged in a plane connects the input end 3321 of the eccentric shaft with the power output shaft of the motor 32 to save space in the axial direction.
  • the transmission assembly may include a first gear 3301 and a second gear 3302 that mesh with each other.
  • the first gear 3301 is fixedly sleeved on the power output shaft of the motor 32
  • the second gear 3302 is fixedly sleeved on the input end 3321 of the eccentric shaft.
  • the motor 32 and the power output shaft of the motor 32 drive the first gear 3301 to rotate synchronously, and then drive the second gear 3302 and the eccentric shaft 332 to rotate.
  • the structure of the transmission assembly is not limited thereto, other gears may be provided between the first gear 3301 and the second gear 3302 , and the first gear 3301 and the second gear 3302 may also be internally meshed.
  • the pump body 31 is arranged longitudinally, that is, the plunger 316 is arranged longitudinally, and the drainage holes 382 are opened on both sides of the casing 2, and the drainage holes 382 are vertically arranged to the plunger.
  • the power supply unit 23 is connected under the handle 22 .
  • the rated pressure output by the pump body 31 is 3-6MPa
  • the flow rate of the pump body is 200-250L/h
  • the pump body 31 is passed through the plunger 316 and connected with the power output of the motor 32
  • more than 70% of the cross-sectional area is 33.6-59.6cm 2 (due to the unevenness of the outer edge of the pump body, or the surface of the pump body.
  • the height H of the pump body and the width W of the pump body are not fixed values, which affect the cross-sectional area of the pump body); the height H of the pump body 31 is 79.2-98.5mm, and the width W is 40.5-60.5mm; the eccentricity of the eccentric shaft 332 is 3.1-3.5mm; the stroke of the plunger 316 is 6.2-7.0mm.
  • the difference between the hand-held high-pressure cleaning machine of the third embodiment of the present invention and the first embodiment is that: in order to ensure that the mating surface of the needle roller bearing and the plunger 316 is stressed at the center, and to avoid the tip wear of the needle roller bearing, this
  • the two axial ends of the inner wall of the plunger groove 3161 are respectively chamfered, so that the two ends of the needle roller bearing do not contact the inner wall of the plunger groove 3161, so as to avoid stress on the tip of the needle roller bearing.
  • a first slope 3162 is formed at the opening end of the plunger groove 3161
  • a second slope 3163 is formed at the end away from the opening.
  • the difference between the hand-held high-pressure cleaning machine of the fourth embodiment of the present invention and the first embodiment is that: in order to ensure that the mating surface of the needle roller bearing and the plunger 316 is stressed at the center, and to avoid the tip wear of the needle roller bearing, this In the embodiment, the axially outer end of the inner wall of the plunger groove 3161 is chamfered, and the inner end is grooved, so that the two ends of the needle roller bearing do not contact the inner wall of the plunger groove 3161, and the tip of the needle roller bearing is avoided. Force. Specifically, a third slope 3164 is formed at the opening end of the plunger groove 3161 , and an annular groove 3165 is formed at the end away from the opening.

Abstract

Pompe à piston (3) et machine de nettoyage à haute pression manuelle, la machine de nettoyage à haute pression manuelle comprenant un corps de pompe (31), un moteur (32) et un mécanisme de transmission (33) ; le corps de pompe (31) comprend une chambre à haute pression (315), un plongeur (316), un canal d'admission d'eau (317) et un canal de sortie d'eau (318) ; le plongeur (316) peut réaliser un mouvement de va-et-vient par rapport à la chambre à haute pression (315), et le moteur (32) entraîne, au moyen du mécanisme de transmission (33), le corps de pompe (31) pour son fonctionnement ; la pression nominale délivrée par le corps de pompe (31) est de 3 à 7 Mpa, le produit de la taille du moteur (32) dans la direction axiale d'un arbre de sortie de puissance de celui-ci, la taille du corps de pompe (31) dans la direction d'extension du plongeur (316) de celui-ci et la plus petite de la largeur et de la hauteur du mécanisme de transmission (33) est de 190-230 cm3 ; et le moteur (32) est un moteur sans balai à rotor externe.
PCT/CN2022/110274 2021-08-04 2022-08-04 Pompe à piston et machine de nettoyage à haute pression manuelle WO2023011590A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202121810583.6 2021-08-04
CN202121810583.6U CN215805108U (zh) 2021-08-04 2021-08-04 柱塞泵及手持式清洗机

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WO2023011590A1 true WO2023011590A1 (fr) 2023-02-09

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WO (1) WO2023011590A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215805108U (zh) * 2021-08-04 2022-02-11 苏州宝时得电动工具有限公司 柱塞泵及手持式清洗机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014233665A (ja) * 2013-05-31 2014-12-15 日立工機株式会社 高圧洗浄機用ポンプ、高圧洗浄機
CN108160366A (zh) * 2016-12-06 2018-06-15 苏州宝时得电动工具有限公司 手持式高压清洗机
CN108533471A (zh) * 2017-03-03 2018-09-14 苏州宝时得电动工具有限公司 手持式高压清洗机
CN209687668U (zh) * 2019-03-01 2019-11-26 宝时得科技（中国）有限公司 一种泵单元及高压清洗机
CN214741894U (zh) * 2020-12-24 2021-11-16 陆丽敏 一种手持清洗机
CN215805108U (zh) * 2021-08-04 2022-02-11 苏州宝时得电动工具有限公司 柱塞泵及手持式清洗机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014233665A (ja) * 2013-05-31 2014-12-15 日立工機株式会社 高圧洗浄機用ポンプ、高圧洗浄機
CN108160366A (zh) * 2016-12-06 2018-06-15 苏州宝时得电动工具有限公司 手持式高压清洗机
CN108533471A (zh) * 2017-03-03 2018-09-14 苏州宝时得电动工具有限公司 手持式高压清洗机
CN209687668U (zh) * 2019-03-01 2019-11-26 宝时得科技（中国）有限公司 一种泵单元及高压清洗机
CN214741894U (zh) * 2020-12-24 2021-11-16 陆丽敏 一种手持清洗机
CN215805108U (zh) * 2021-08-04 2022-02-11 苏州宝时得电动工具有限公司 柱塞泵及手持式清洗机

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