Cleaning pump with built-in motor

Abstract

The invention discloses a cleaning pump with a built-in motor. The cleaning pump comprises a pump shell, a shell cover, a battery assembly, the motor, a pressure switch and a flow channel assembly. The pump shell is of a box body structure with an opening in the top; an inner cavity of the pump shell comprises a first mounting part for accommodating the battery assembly, a second mounting part for accommodating the motor and a third mounting part for accommodating the pressure switch; a water inlet and a water outlet are formed in the flow channel assembly, and the flow channel assembly is driven by the motor to enable liquid to flow from the water inlet to the water outlet; the shell cover is installed on the top of the pump shell in a sealed mode. The flow channel assembly is connected with the lower surface of the pump shell and located under the second installation part. The cleaning pump with the built-in motor is high in integration level and good in waterproof performance, the motor, the battery assembly and the pressure switch are sealed in the space defined by the pump shell and the pump cover by arranging the corresponding mounting cavities in the pump shell, external connection is reduced, the compactness of the overall structure is improved, and the service life of the cleaning pump is prolonged. And water can be effectively prevented from corroding parts such as a motor and a battery.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning pumps, and in particular to a cleaning pump with a built-in motor. Background Art

[0002] As people's quality of life improves, their requirements for the cleanliness of their living environment are getting higher and higher. In order to facilitate people to carry out cleaning work anytime and anywhere, handheld portable pressure washers currently on the market are powered by battery packs, which facilitates outdoor cleaning.

[0003] The driving part of the pressure washer is a motor. The pressure washer in the prior art has the following defects: (1) The motor and the pump body are separated. For example, in patent CN111692068A, the motor is located on the outside of the pump body. This structure helps to dissipate heat from the motor and prevents the motor from contacting the liquid inside the pump body. However, in a humid environment, the motor is easily corroded by external water and dust.

[0004] (2) Some cleaning machines use brushed DC motors. The motors and battery packs are easily corroded by water. Brushed DC motors have a short lifespan and generate large electromagnetic interference to the outside.

[0005] (3) The installation design of the motor, pump and battery pack is not compact, resulting in a large size, heavy weight, and poor portability and mobility.

[0006] Therefore, it is necessary to develop a pump for a pressure washer that is small in size, light in weight, waterproof, dustproof, corrosion-resistant, reliable, and has a long service life. Summary of the invention

[0007] In order to solve the technical problem that the motor and the pump body of the pressure cleaning machine in the prior art are independently arranged, the motor is directly exposed to the environment and is easily corroded by external water and dust, the present invention provides a cleaning pump with a built-in motor to solve the above problem.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a motor-built-in cleaning pump, comprising a pump casing, a casing cover, a battery assembly, a motor, a pressure switch and a flow channel assembly; the pump casing is a box structure with an opening at the top, and the internal cavity of the pump casing comprises a first mounting portion for accommodating the battery assembly, a second mounting portion for accommodating the motor and a third mounting portion for accommodating the pressure switch; the flow channel assembly is provided with a water inlet and a water outlet, and the flow channel assembly allows liquid to flow from the water inlet to the water outlet under the drive of the motor; the casing cover is sealingly mounted on the top of the pump casing; the flow channel assembly is connected to the lower surface of the pump casing and is located directly below the second mounting portion.

[0009] Furthermore, the first mounting part, the second mounting part and the third mounting part are arranged in sequence along the length direction of the pump casing, and the second mounting part has a mounting frame erected on the outer periphery of the motor, and the mounting frame has a crossbeam located between the motor and the casing cover, and the wires of the pressure switch are connected to the lead wires of the motor through the top of the crossbeam.

[0010] Furthermore, a wire groove is provided on the top of the crossbeam.

[0011] Furthermore, the mounting surface of the motor is fitted with the inner bottom surface of the pump housing, or a thermally conductive silica gel or a thermally conductive pad is provided between the mounting surface of the motor and the inner bottom surface of the second mounting portion.

[0012] Furthermore, the mounting surface of the battery assembly is fitted with the inner bottom surface of the pump housing, or there is a thermally conductive silica gel or a thermally conductive pad between the mounting surface of the battery assembly and the inner bottom surface of the first mounting.

[0013] Furthermore, the motor is an outer rotor brushless DC motor.

[0014] Furthermore, the motor includes a stator bracket, a thermal pad, a drive plate assembly, a coil assembly and a rotor assembly. A bearing sleeve is arranged at the center of the stator bracket. The thermal pad, the drive plate assembly and the coil assembly are sequentially mounted on the bearing sleeve. The rotor assembly is located at the outer periphery of the coil assembly. The rotating shaft of the rotor assembly passes through the bearing sleeve. A mounting column is arranged at the outer edge of the stator bracket, and the inner bottom surface of the second mounting portion has a first screw hole fixed to the mounting column.

[0015] Furthermore, the mounting frame has a support foot extending in the direction of the stator bracket, and the support foot has a mounting hole that cooperates with the mounting column.

[0016] Furthermore, the flow channel assembly includes a pump body and pump covers covering both sides of the pump body, the water inlet and the water outlet are arranged on both sides of the pump body along the length direction of the pump shell, and the two pump covers are located on both sides of the pump body along the width direction of the pump shell.

[0017] Furthermore, the pump body has a sealing gasket opposite to the pump cover, the pump cover and the sealing gasket form a pressure chamber, and the pump body located between the two sealing gaskets forms an inlet chamber, a power chamber and an outlet chamber that are not connected to each other. A plunger is provided in the power chamber, and the plunger is connected to an eccentric wheel installed at the output end of the motor. Both ends of the plunger abut against two sealing gaskets respectively, the inlet chamber is connected to the water inlet, and the outlet chamber is connected to the water outlet, and the two sealing gaskets both have an inlet one-way valve connecting the pressure chamber and the inlet chamber, and an outlet one-way valve connecting the pressure chamber and the outlet chamber.

[0018] Furthermore, two baffles are connected between the two sealing pads, and the baffles and the sealing pads enclose a power cavity; the sealing pads are provided with a plunger hole that cooperates with the top column at the end of the plunger.

[0019] Furthermore, the top outer peripheral surface of the pump housing is provided with a plurality of second screw holes fixed to the housing cover.

[0020] Furthermore, a sealing ring or a sealing gasket or a waterproof glue is provided between the connecting surfaces of the pump casing and the casing cover.

[0021] Furthermore, the battery assembly includes a plurality of lithium batteries, a wirelessly chargeable power management board, and an induction coil fixed to the inside of the pump cover. The two connectors of the induction coil are electrically connected to the power management board, and the lithium battery is electrically connected to the power management board. When the pump cover is close to an external charger, the power management board can receive electrical energy through the induction coil and charge the lithium battery.

[0022] Furthermore, the power management board is provided with capacitor C1, capacitor C2, charging management chip IC1 and LED lamp, one end of the induction coil L1 is connected to the 7th pin of the charging management chip IC1, the other end of the induction coil L1 is connected to the 13th pin of the charging management chip IC1, one end of the capacitor C1 is connected to the 7th pin of the charging management chip IC1, the other end of the capacitor C1 is connected to the 13th pin of the charging management chip IC1; one end of the capacitor C2 is connected to the 12th pin of the charging management chip IC1, the other end of the capacitor C2 is connected to the 13th pin of the charging management chip IC1; the positive terminal of the LED lamp is connected to the 11th pin of the charging management chip IC1, and the negative terminal of the LED lamp is connected to the 6th pin of the charging management chip IC1; the positive terminal of the lithium battery is connected to the 8th pin of the charging management chip IC1, and the negative terminal of the lithium battery is connected to the 13th pin of the charging management chip IC1.

[0023] The beneficial effects of the present invention are: (1) The motor-built-in cleaning pump described in the present invention has high integration and good waterproof performance. By arranging a corresponding installation cavity in the pump casing, the motor, battery assembly and pressure switch are sealed in the space surrounded by the pump casing and the pump cover, thereby reducing external connections, improving the compactness of the overall structure, and effectively preventing water from corroding the motor, battery and other components.

[0024] (2) The present invention arranges a flow channel assembly below the second mounting portion where the motor is mounted, so that the heat generated by the motor is transferred to the water through the bottom surface of the second mounting portion. When the cleaning pump is working, the flowing water can take away the heat generated by the motor, thereby reducing the temperature rise of the motor.

[0025] (3) The present invention installs the motor inside the pump casing, and the flow channel assembly is located at the bottom of the pump casing. Compared with the traditional cleaning pump, the length of the cleaning pump is shortened, the overall structure is more square, and it is convenient to carry and store. In addition, the motor output shaft is changed from a horizontal arrangement to a vertical arrangement, thereby reducing the shear force on the motor output shaft.

[0026] (4) In the present invention, since the flow channel assembly is placed at the bottom of the pump housing, the four sides of the flow channel assembly are not blocked, and the water inlet and the water outlet can be arranged at the two ends of the flow channel assembly respectively, which can not only ensure the symmetry of the structure, but also separate the water inlet channel and the water outlet channel, effectively avoiding water backflow at the water inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 is an exploded view of the motor-built-in cleaning pump of the present invention; Figure 2 It is a structural schematic diagram of the pump casing and the pump body in the present invention; Figure 3 is a top view of the pump housing of the present invention; Figure 4 is a top view of the motor-built-in cleaning pump of the present invention; Figure 5 yes Figure 4 AA section view; Figure 6 yes Figure 5 BB section view ( Figure 6 The plunger in the piston moves to the bottom); Figure 7 yes Figure 5 BB section view ( Figure 7 The plunger in the piston moves to the uppermost position); Figure 8 is a three-dimensional diagram of the mounting frame of the present invention; Fig. 9 is a top view of the first pump cover of the present invention; Fig.10 is a three-dimensional view of the first sealing gasket in the present invention (looking down from the side facing the first pump cover); Fig.11 is a three-dimensional view of the first sealing gasket in the present invention (looking down from the side facing the plunger); Fig.12 is a three-dimensional diagram of the plunger in the present invention; Fig.13 is an exploded view of the motor in the present invention; Fig.14 is an exploded view of the rotor assembly of the present invention; Fig.15 is a perspective view of the drive plate assembly of the present invention (looking down from the side facing the stator assembly); Fig.16 is a perspective view of the drive plate assembly of the present invention (looking down from the side facing the stator bracket); Fig.17is a three-dimensional diagram of the stator bracket in the present invention; Fig.18 is an axial cross-sectional view of the stator support in the present invention; Fig.19 is an exploded schematic diagram of the battery assembly in the cleaning pump of the present invention; Fig. 20 It is a schematic diagram of the assembly structure of the battery assembly in the cleaning pump of the present invention; Fig.21 yes Fig. 20 The enlarged image at a in the middle; Fig. 22 It is a schematic diagram of a wireless charging circuit of a battery assembly in the present invention.

[0029] In the figure, 1, pump housing, 101, second screw hole, 2, housing cover, 201, screw through hole, 3, battery assembly, 301, lithium battery, 302, power management board, 303, induction coil, 304, fixing plate, 4, motor, 401, stator bracket, 4011, bearing sleeve, 4012, mounting column, 4013, bearing mounting hole, 402, thermal pad, 403, drive board assembly, 4031, PCB board, 4032, power cord, 4033, electrolytic Capacitor, 4034, power tube, 4035, mounting hole, 4036, pad U, 4037, pad V, 4038, pad W, 404, rotor assembly, 4041, shaft, 4042, rotor steel sleeve, 4043, magnetic tile, 4044, rotor bracket, 4045, retaining ring, 4046, limit groove, 405, coil assembly, 406, rotating bearing, 5, pressure switch, 6, flow channel assembly, 601, water inlet, 602, water outlet, 603, the first A pump cover, 604, a second pump cover, 605, a pump body, 606, an inlet chamber, 607, a power chamber, 608, an outlet chamber, 609, a first sealing gasket, 610, a second sealing gasket, 611, a first chamber, 6111, a first high pressure zone, 6112, a first low pressure zone, 612, a second chamber, 6121, a second high pressure zone, 6122, a second low pressure zone, 613, a first inlet check valve, 614, a second inlet check valve, 615, a first outlet check valve, 616. Second outlet one-way valve, 617. Baffle, 618. Side plate, 7. First mounting part, 8. Second mounting part, 801. First screw hole, 9. Third mounting part, 10. Screw, 11. Mounting frame, 1101. Crossbeam, 1102. Wire groove, 1103. Support foot, 1104. Mounting hole, 12. Plunger, 1201. Top column, 13. Eccentric wheel, 14. Bearing, 15. Protrusion, 16. Groove, 17. Plunger hole, 18. Induction coil port. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] like Figure 1-Figure 3 As shown, a cleaning pump with a built-in motor includes a pump housing 1, a housing cover 2, a battery assembly 3, a motor 4, a pressure switch 5 and a flow channel assembly 6; the battery assembly 3, the motor 4 and the pressure switch 5 are connected in series, the battery assembly 3 is used to power the circuit, and the pressure switch 5 is used to control the start or stop of the motor 4 according to the pressure of the water outlet 602.

[0032] The pump housing 1 is a box structure with an opening at the top. The internal cavity of the pump housing 1 includes a first mounting portion 7 for accommodating the battery assembly 3, a second mounting portion 8 for accommodating the motor 4, and a third mounting portion 9 for accommodating the pressure switch 5. The flow channel assembly 6 is provided with a water inlet 601 and a water outlet 602. The flow channel assembly 6 drives the motor 4 to make the liquid flow from the water inlet 601 to the water outlet 602. The housing cover 2 is sealed and installed on the top of the pump housing 1. The motor 4, the battery assembly 3, the pressure switch 5 and other components are all installed in the space surrounded by the pump housing 1 and the housing cover 2, which can effectively prevent water from corroding the motor 4, the battery and other components. The flow channel assembly 6 is connected to the lower surface of the pump housing 1 and is located directly below the second mounting portion 8.

[0033] Compared with the traditional cleaning pump, the present invention places the battery assembly 3, the motor 4 and the pressure switch 5 inside the pump housing 1, which reduces external connections, improves the compactness of the overall structure, has a high degree of integration, and effectively prevents the motor 4, the battery assembly 3, etc. from being corroded by external water and dust. The flow channel assembly 6 for circulating water is arranged at the bottom of the pump housing 1, not along the length direction of the pump housing 1 as traditionally arranged, thereby shortening the overall length of the cleaning pump, facilitating transportation, and reducing the risk of bending and deformation of the pump housing 1. At the same time, in order to avoid the problem that the motor 4 cannot dissipate heat in time due to being sealed in the pump housing 1, the present invention also places the flow channel assembly 6 below the second mounting portion 8, and water flows in the flow channel assembly 6. The heat generated by the motor 4 is conducted to the water through the bottom surface of the second mounting portion 8. When the cleaning pump is working, the flowing water can take away the heat generated by the motor 4, thereby reducing the temperature rise of the motor 4 and improving the reliability of the motor 4. Therefore, the present invention solves the problem that the motor 4 and the battery assembly 3 are susceptible to corrosion while ensuring rapid heat dissipation of the motor 4.

[0034] In addition, by adopting the cleaning pump structure of the present invention, the output shaft of the motor 4 can be transformed from the traditional horizontal arrangement to the vertical arrangement. When the output shaft of the motor 4 rotates, the centrifugal force in various directions of the output shaft will not be different due to gravity, thereby affecting the stable output of water in the flow channel component 6.

[0035] Embodiment 1 like Figure 1-Figure 3 As shown, a cleaning pump with a built-in motor 4 includes a pump housing 1, a housing cover 2, a battery assembly 3, a motor 4, a pressure switch 5 and a flow channel assembly 6.

[0036] The pump housing 1 is a box structure with an opening at the top. The internal cavity of the pump housing 1 includes a first mounting portion 7 for accommodating the battery assembly 3, a second mounting portion 8 for accommodating the motor 4, and a third mounting portion 9 for accommodating the pressure switch 5. The flow channel assembly 6 is provided with a water inlet 601 and a water outlet 602. The flow channel assembly 6 drives the motor 4 to allow the liquid to flow from the water inlet 601 to the water outlet 602. The housing cover 2 is sealed and mounted on the top of the pump housing 1. The flow channel assembly 6 is connected to the lower surface of the pump housing 1 and is located directly below the second mounting portion 8.

[0037] In order to minimize the volume of the pump casing 1, the outer shape of the pump casing 1 is set according to the arrangement positions of the battery assembly 3, the motor 4 and the pressure switch 5. Therefore, the shape of the pump casing 1 is related to the arrangement positions of the battery assembly 3, the motor 4 and the pressure switch 5 in the pump casing 1. In order to make the outer shape of the pump casing 1 more regular, the first mounting portion 7, the second mounting portion 8 and the third mounting portion 9 are preferably arranged side by side so that the pump casing 1 forms an approximately rectangular structure.

[0038] As for the arrangement sequence of the first mounting portion 7, the second mounting portion 8 and the third mounting portion 9, since the pressure switch 5 is a cylindrical structure, the third mounting portion 9 is also a cylindrical structure, and its size is smaller than the first mounting portion 7 and the second mounting portion 8, so the third mounting portion 9 is arranged on the outside, and the motor 4 needs to be electrically connected to the pressure switch 5, so it is preferred to arrange the second mounting portion 8 close to the third mounting portion 9, that is, Figure 2 and Figure 3 As shown in FIG. 1 , the first mounting portion 7 , the second mounting portion 8 and the third mounting portion 9 are arranged in sequence along the length direction of the pump housing 1 .

[0039] For the fixing of pump casing 1 and casing cover 2: The top outer peripheral surface of the pump housing 1 is provided with a plurality of second screw holes 101 for fixing the housing cover 2. Figure 1 , Figure 3 and Figure 4As shown, a plurality of second screw holes 101 are evenly arranged on the periphery of the first mounting portion 7, the second mounting portion 8 and the third mounting portion 9, corresponding to the upper screw through holes 201 of the shell cover 2. The shell cover 2 and the pump shell 1 are fixedly sealed with screws 10, and the screws 10 pass through the screw through holes 201 of the shell cover 2 and are screwed into the second screw holes 101 of the pump shell 1. Such a design is to enable the battery assembly 3, the motor 4 and the pressure switch 5 to be sealed and installed in the first mounting portion 7, the second mounting portion 8 and the third mounting portion respectively, so as to have the effects of being waterproof, dustproof and corrosion-resistant. In order to better achieve the effects of being waterproof and dustproof, a sealing ring or a sealing gasket may be added between the pump shell 1 and the shell cover 2, or waterproof glue may be applied.

[0040] For the installation of motor 4: Since there are moving parts inside the motor 4, it is easy to generate vibration, which may cause the assembly of the motor 4 and the pump housing 1 to loosen, so it is necessary to install an additional mounting structure. In this embodiment, a mounting frame 11 is arranged on the outer periphery of the motor 4 in the second mounting portion 8. The mounting frame 11, the motor 4 and the pump housing 1 are fixed at the same time, which can increase the fixing effect of the motor 4. At the same time, the mounting frame 11 isolates the motor 4 from the remaining structures (such as the battery assembly 3 and the housing cover 2). The inner bottom surface of the second mounting portion 8 is provided with a first screw hole 801 for mounting the motor 4, which is used to fix the motor 4 and the mounting frame 11.

[0041] The heat generated by the motor 4 and the battery assembly 3 is mainly conducted outwards from the bottom surface of the pump housing 1. To speed up the heat transfer, Figure 5 As shown, it is preferred that the mounting surface of the motor 4 is closely fitted with the inner bottom surface of the pump housing 1, so that the internal space of the pump housing 1 can be better saved and utilized. Similarly, the mounting surface of the battery assembly 3 is preferably closely fitted with the inner bottom surface of the pump housing 1. In order to better dissipate the heat of the motor 4, thermal conductive silicone grease can be applied between the mounting surface of the motor 4 and the bottom surface of the second mounting portion 8, or a thermal conductive pad can be added.

[0042] Battery Assembly 3: The battery assembly 3 is installed in the first installation portion 7 of the pump housing 1 , and the battery assembly 3 includes a plurality of lithium batteries and a power management board.

[0043] Pressure switch 5: The pressure switch 5 is installed in the third installation part 9 of the pump housing 1, and two wires of the pressure switch 5 are connected in series to the positive pole of the power line 4032 of the motor 4 drive board.

[0044] When the pressure of the water outlet 602 exceeds the set value, the power line 4032 of the pressure switch 5 is in an open circuit state, cutting off the power supply of the motor 4, thereby stopping the operation of the water pump. This can avoid excessive operation or damage of the water pump under overpressure.

[0045] When the pressure at the water outlet 602 is lower than the set value, the power line 4032 of the pressure switch 5 is short-circuited, and the drive board of the motor 4 can be powered normally, so that the water pump can work normally. This ensures that when the pressure is lower than the set value, the water pump can start in time and provide sufficient water pressure.

[0046] The installation and working principle of the pressure switch 5 can effectively control the working state of the water pump. Such a design can automatically control the switch of the water pump according to actual needs, thereby improving the convenience and safety of use.

[0047] Runner component 6: A plunger 12 is provided in the flow channel assembly 6, and an eccentric wheel 13 and a bearing 14 are installed on the output shaft of the motor 4. The bearing 14 is located in the inner hole of the plunger 12. When the motor 4 rotates, the eccentric wheel 13 drives the plunger 12 to reciprocate, thereby forming a pressure difference in the flow channel assembly 6, causing the water to flow.

[0048] Embodiment 2 On the basis of the first embodiment, in order to prevent the rotor assembly 404 of the motor 4 from hitting the externally connected wires when rotating, the present embodiment is improved as follows: The mounting frame 11 has a crossbeam 1101 located between the motor 4 and the housing cover 2, and the wire of the pressure switch 5 passes through the top of the crossbeam 1101 and is connected to the battery assembly 3. Figure 1 As shown, the lead wire of the motor 4 is arranged toward the battery assembly 3, which is far away from the pressure switch 5. The crossbeam 1101 can separate the lead wire of the pressure switch 5 from the motor 4 to avoid mutual interference between the two. As a preferred embodiment, Figure 8 As shown, a wire groove 1102 is provided on the top of the crossbeam 1101 .

[0049] In this embodiment, the wire groove 1102 for installing the wire of the pressure switch 5 is integrated on the mounting frame 11, which can effectively prevent the wire from being entangled with the rotor assembly 404 of the motor 4 and save space.

[0050] Embodiment 3 Traditional cleaning pumps mostly use brushed DC motors 4. Brushed DC motors 4 are large in size, heavy in weight, short in life, generate large external electromagnetic interference, and are not convenient to be installed in the pump casing 1. In order to reduce the size of the pump casing 1 and increase the mobility and portability of the cleaning pump, the motor 4 in this embodiment uses a more compact outer rotor brushless DC motor 4, which has a long life, no dust and external electromagnetic interference generated by brushes and commutators, and also improves the reliability and stability of the system.

[0051] Fig.13The figure shows the specific structure of the motor 4 in the cleaning pump described in this embodiment, including a stator bracket 401, a thermal pad 402, a drive plate assembly 403, a coil assembly 405 and a rotor assembly 404. A bearing sleeve 4011 is arranged at the center of the stator bracket 401, and the thermal pad 402, the drive plate assembly 403 and the coil assembly 405 are sequentially mounted on the bearing sleeve 4011. The rotor assembly 404 is located at the periphery of the coil assembly 405, and the rotating shaft 4041 of the rotor assembly 404 passes through the bearing sleeve 4011; the outer edge of the stator bracket 401 is provided with a mounting column 4012 which corresponds one-to-one with the first screw hole 801.

[0052] like Fig.14 As shown, the rotor assembly 404 includes a rotor steel sleeve 4042, a magnetic tile 4043 bonded to the inner wall of the rotor steel sleeve 4042, a rotor bracket 4044, a rotating shaft 4041, and a retaining ring 4045 installed in the outer ring groove of the rotating shaft 4041, wherein the rotor bracket 4044 is provided with a center hole at the center, which is interference fit with one end of the outer knurling of the rotating shaft 4041, and the outer edge of the rotor bracket 4044 is provided with a limiting groove 4046 for installing the magnetic tile 4043, and the number of the limiting groove 4046 is the same as the number of the magnetic tile 4043.

[0053] The coil assembly 405 consists of a stator core and enameled wire wound on the stator core. The three enameled wire terminals U, V, and W of the coil assembly 405 are respectively welded to pads U4036, pad V4037, and pad W4038 on the PCB board 4031 of the drive board assembly 403. The center hole of the stator core is mounted on the bearing sleeve 4011 of the stator bracket 401.

[0054] like Fig.15 and Fig.16 As shown, the drive board assembly 403 is composed of a PCB board 4031, a power line 4032, a control line, an electrolytic capacitor 4033 installed on the PCB board 4031, and a power tube 4034 installed on the PCB board 4031. The PCB board 4031 is provided with two mounting holes 1104 fixed to the stator bracket 401.

[0055] The thermal pad 402 is installed between the drive board assembly 403 and the stator bracket 401. The thermal conductivity of the thermal pad 402 is Within the range, such a design can transfer the heat generated by the power tube 4034 on the PCB board 4031 to the stator bracket 401, thereby better dissipating the heat.

[0056] like Fig.17 and Fig.18 As shown, two bearing mounting holes 4013 are provided in the bearing sleeve 4011 of the stator bracket 401 for mounting the front and rear two rotating bearings 406. The material of the stator bracket 401 is preferably aluminum with good thermal conductivity.

[0057] In this embodiment, by integrating the drive board assembly 403 between the stator bracket 401 and the coil assembly 405, the space occupied by the overall structure can be effectively reduced, and the volume and weight of the motor 4 can be reduced. In addition, the drive board assembly 403 and the coil assembly 405 are tightly assembled, which helps to reduce the electromagnetic interference and improve the electromagnetic compatibility of the motor 4. It also helps the heat generated by the power tube 4034 on the PCB board 4031 to be dissipated faster through the stator bracket 401, thereby improving the heat dissipation performance of the motor 4 and reducing the operating temperature of the motor 4. There is no need to install a separate radiator to dissipate the heat of the power tube 4034, thereby reducing the volume of the whole machine, and reducing the weight and volume.

[0058] When the motor 4 of this embodiment is assembled with the pump housing 1, the stator bracket 401 serves as a mounting component, the lower surface of the stator bracket 401 is in contact with the inner bottom surface of the second mounting portion 8, and the mounting frame 11 has a support foot 1103 extending in the direction of the stator bracket 401, and the support foot 1103 has a mounting hole 1104 that cooperates with the mounting column 4012.

[0059] Embodiment 4 In a conventional cleaning pump, since the motor 4 occupies one side of the pump housing 1, Figure 6 As shown, the water inlet 601 and the water outlet 602 need to be arranged on the same side of the pump housing 1. For example, in patent CN111692068A, the pressure chamber in the flow channel assembly 6 is close to the water inlet 601 and the water outlet 602. The water inlet and outlet in the high-pressure chamber are located on the same side of the chamber. The water needs to flow back and forth inside the chamber, which is prone to turbulence, causing pipeline vibration and thus generating working noise. For this reason, this embodiment improves the flow channel assembly 6 on the basis of the above embodiment: In terms of appearance and structure: the flow channel assembly 6 includes a pump body 605 and pump covers covering both sides of the pump body 605. The water inlet 601 and the water outlet 602 are arranged on both sides of the pump body 605 along the length direction of the pump housing 1, and the two pump covers are located on both sides of the pump body 605 along the width direction of the pump housing 1. In terms of overall structure, the flow channel assembly 6 is approximately symmetrical, and the cleaning pump has higher stability when working. For the convenience of description, the two pump covers are named the first pump cover 603 and the second pump cover 604 in this embodiment. Figure 1 As shown, the first pump cover 603 and the second pump cover 604 are symmetrically installed on both sides of the pump body 605 and are located below the bottom of the second installation portion 8.

[0060] In terms of internal structure: the pump body 605 has a sealing gasket opposite to the pump cover, the pump cover and the sealing gasket form a pressure chamber, and the pump body 605 located between the two sealing gaskets forms an inlet chamber 606, a power chamber 607 and an outlet chamber 608 that are not connected to each other. A plunger 12 is provided in the power chamber 607, and the plunger 12 is connected to the eccentric wheel 13 installed at the output end of the motor 4. The two ends of the plunger 12 respectively abut against the two sealing gaskets, the inlet chamber 606 is connected to the water inlet 601, and the outlet chamber 608 is connected to the water outlet 602. Both sealing gaskets have an inlet one-way valve connecting the pressure chamber and the inlet chamber 606, and an outlet one-way valve connecting the pressure chamber and the outlet chamber 608.

[0061] For ease of description, in this embodiment, the sealing gasket located between the first pump cover 603 and the pump body 605 is named as the first sealing gasket 609, and the sealing gasket located between the second pump cover 604 and the pump body 605 is named as the second sealing gasket 610. Fig. 9 The structure of the first pump cover 603 is shown. Fig.10 and Fig.11 The structure of the first sealing gasket 609 is shown. The first pump cover 603 and the first sealing gasket 609 form (enclose) a first chamber 611, wherein the protrusion 15 on the first sealing gasket 609 and the groove 16 on the first pump cover 603 separate the first chamber 611 into a first high-pressure area 6111 and a first low-pressure area 6112. The separation here means that the first high-pressure area 6111 and the first low-pressure area 6112 are separated on both sides of the first chamber 611, but the two are still kept in normal connection. The second pump cover 604 and the second sealing gasket 610 form (enclose) a second chamber 612, wherein the protrusion 15 on the second sealing gasket 610 and the groove 16 on the second pump cover 604 separate the second chamber 612 into a second high-pressure zone 6121 and a second low-pressure zone 6122, which are normally connected; the first high-pressure zone 6111 and the second high-pressure zone 6121 are connected to the water outlet 602 through the outlet chamber 608, and the first low-pressure zone 6112 and the second low-pressure zone 6122 are connected to the water inlet through the inlet chamber 606.

[0062] The first low-pressure zone 6112 and the second low-pressure zone 6122 are respectively installed with the first inlet check valve 613 and the second inlet check valve 614, the installation directions of the first inlet check valve 613 and the second inlet check valve 614 are opposite, and the two are not opened at the same time. The first high-pressure zone 6111 and the second high-pressure zone 6121 are respectively installed with the first outlet check valve 615 and the second outlet check valve 616, the installation directions of the first outlet check valve 615 and the second outlet check valve 616 are opposite, and the two are not opened at the same time. The two inlet check valves have the same installation direction, and the two outlet check valves have the same installation direction, that is, the springs of the inlet check valves are both located in the pressure chamber, and the springs of the outlet check valves are both located in the outlet chamber 608.

[0063] like Fig.12As shown, an oblong hole is provided in the center of the plunger 12 for mounting the bearing 14 on the eccentric wheel 13 on the motor 4. Top columns 1201 are also provided at both ends of the plunger 12. The first sealing gasket 609 and the second sealing gasket 610 are respectively provided with plunger holes 17 for mounting the column 4012 plug. The material of the first sealing gasket 609 and the second sealing gasket is preferably nitrile rubber or EPDM rubber with a Shore hardness in the range of 15 to 45 degrees.

[0064] The first sealing gasket 609 and the second sealing gasket 610 are movable structures, which are driven by the plunger 12 to move closer to or away from the corresponding pump cover, thereby changing the pressure in the pressure chamber and forming a pressure difference between the pressure chamber and the inlet chamber 606 and between the pressure chamber and the outlet chamber 608.

[0065] Since the inlet one-way valve and the outlet one-way valve on the two pressure chambers are respectively arranged close to the two ends of the pressure chamber, liquid can enter from one end of the pressure chamber and flow out from the other end. The liquid flow direction is stable and turbulence is not easy to form. In addition, the flow path of the liquid in the pressure chamber is lengthened, which helps to form a continuous water flow output after rapid water storage, thereby ensuring stable water flow.

[0066] In a further design, two baffles 617 are connected between the two sealing pads, and the baffles 617 and the sealing pads form a power chamber 607. Figure 6 As shown, the baffle 617 connects the first sealing gasket 609 and the second sealing gasket 610, and can drive the two sealing gaskets to move simultaneously when the plunger 12 moves up and down. At the same time, the side plate 618 extending laterally from the baffle 617 can be used to abut against the two outlet one-way valves.

[0067] The following briefly describes the principle: When the eccentric wheel 13 and the bearing 14 installed on the output shaft of the motor 4 rotate continuously, the bearing 14 causes the plunger 12 to reciprocate up and down through the oblong hole of the plunger 12.

[0068] S1, such as Figure 6As shown, when the plunger 12 reaches the lowest position, the volume of the first low-pressure zone 6112 increases to form a partial vacuum, the water pressure in the inlet chamber 606 is greater than the water pressure in the first low-pressure zone 6112, the valve core and the sealing ring of the first inlet one-way valve 613 move upward under the action of the water pressure, the spring is in a compressed state, the first inlet one-way valve 613 opens, and the water in the inlet chamber 606 is sucked into the first low-pressure zone 6112; the volume of the second low-pressure zone 6122 decreases, the water in the second low-pressure zone 6122 is compressed, the water pressure in the second low-pressure zone 6122 is greater than the water pressure in the water inlet 601, the valve core and the sealing ring of the second inlet one-way valve 614 move upward under the action of the water pressure, the spring is in an expanded state, and the water pressure pushes the valve core and the sealing ring to close the second inlet one-way valve 614. The volume of the first high-pressure area 6111 increases, forming a partial vacuum. The water pressure in the first high-pressure area 6111 is less than the water pressure in the outlet chamber 608. The water pressure pushes the valve core and the sealing ring of the first outlet check valve 615 upward, and the spring is in an expanded state, so that the first outlet check valve 615 is closed. The volume of the second high-pressure area 6121 decreases, the water in the second high-pressure area 6121 is compressed, and the water pressure in the second high-pressure area 6121 is greater than the water pressure in the outlet chamber 608. The valve core and the sealing ring of the second outlet check valve 616 move upward under the action of the water pressure, the spring is in a compressed state, the second outlet check valve 616 is opened, and the water in the second high-pressure area 6121 is discharged to the water outlet 602.

[0069] S2, such as Figure 7 As shown, when the plunger 12 reaches the uppermost position, the volume of the first low-pressure zone 6112 decreases, the water in the first low-pressure zone 6112 is compressed, the water pressure in the first low-pressure zone 6112 is greater than the water pressure in the water inlet 601, the valve core of the first inlet one-way valve 613 moves downward under the action of the water pressure, the spring is in an expanded state, and the first inlet one-way valve 613 is closed; the volume of the second low-pressure zone 6122 increases, forming a partial vacuum, the water pressure in the water inlet 601 is greater than the water pressure in the second low-pressure zone 6122, the valve core and the sealing ring of the second inlet one-way valve 614 move upward under the action of the water pressure, the spring is in a compressed state, the second inlet one-way valve 614 opens, and the water in the inlet cavity 606 is sucked into the second low-pressure zone 6122. The volume of the first high-pressure area 6111 decreases, and the water in the first high-pressure area 6111 is compressed. The water pressure in the first high-pressure area 6111 is greater than the water pressure in the outlet chamber 608, and the valve core and the sealing ring of the first outlet one-way valve 615 move downward under the action of the water pressure, and the spring is in a compressed state. The first outlet one-way valve 615 is opened, and the water in the first high-pressure area 6111 is discharged to the water outlet 602; the volume of the second high-pressure area 6121 increases, forming a partial vacuum, and the water pressure in the second high-pressure area 6121 is less than the water pressure in the outlet chamber 608. The water pressure pushes the valve core and the sealing ring of the second outlet one-way valve 616 to move upward, and the spring is in an expanded state, so that the second outlet one-way valve 616 is closed.

[0070] When the motor 4 rotates continuously, the plunger 12 in the pump body 605 keeps repeating the above processes S1 and S2, and the water in the water inlet 601 is continuously sucked into the first low-pressure area 6112 and the second low-pressure area 6122, and discharged from the water outlet 602 of the first high-pressure area 6111 and the second high-pressure area 6121. When the first high-pressure area 6111 drains water, the first low-pressure area 6112 is closed, and when the second high-pressure area 6121 drains water, the second low-pressure area 6122 is closed, which can effectively prevent water from flowing back, ensure the correct direction of water flow, and improve the efficiency and stability of the pump.

[0071] Embodiment 5 In the present invention, since the battery assembly 3 is built-in, the problem of battery charging and waterproofing needs to be solved. The waterproofing problem has been achieved through sealed installation. This embodiment mainly introduces the charging structure. Due to the need for waterproof design, the battery assembly 3 is not convenient to use an external charging interface to complete charging. Therefore, this embodiment adopts the following wireless charging structure: The battery assembly 3 includes a plurality of lithium batteries 301, a wirelessly chargeable power management board 302, and an induction coil 303 fixed to the inner side of the pump cover. The two connectors of the induction coil 303 are electrically connected to the power management board 302, and the lithium batteries 301 are electrically connected to the power management board 302. When the pump cover 2 is close to an external charger, the power management board 302 can receive electrical energy through the induction coil 303 and charge the lithium batteries 301. Figure 19-21 As shown, the lithium battery 301 is placed in the first mounting portion 7, the power management board 302 is installed on the top of the lithium battery 301, the induction coil 303 is installed on the inner side of the pump cover 2 through the fixing plate 304, and the power management board 302 is provided with an induction coil port 18. When the lithium battery 301 of the battery assembly 3 is low in power and needs to be charged, the pump cover 2 can be placed close to the transmitting coil L2 of the wireless charger for charging. Fig. 22 As shown, the induction coil L1 in the cleaning pump receives the magnetic field energy of the transmitting coil L2 and converts it into electrical energy, and then transmits the electrical energy to the charging circuit installed on the power management board 302. The charging circuit installed on the power management board 302 charges the lithium battery 301 after receiving the electrical energy at the induction coil port.

[0072] Compared with the wired charging scheme of lithium batteries in the prior art, this embodiment does not use an external electrical connection charging interface. The charging circuit installed inside the pump housing 1 does not need to be physically connected to the external charger. Charging can be completed only through the induction coil 303 installed inside the pump cover 2 and the charging circuit installed on the power management board 302. The risk of poor sealing and water leakage caused by the use of a wired charging interface is avoided. Electrical failures caused by wear or damage to the charging interface are reduced. And it provides a more convenient charging method without worrying about the connection and disconnection of the cable.

[0073] The charging circuit on the power management board 302 is as follows Fig. 22 As shown, it includes capacitor C1, capacitor C2, charging management chip IC1 and LED lamp, the model of charging management chip IC1 is LTC4126, one end of induction coil L1 is connected to the 7th pin of charging management chip IC1, the other end of induction coil L1 is connected to the 13th pin of charging management chip IC1, one end of capacitor C1 is connected to the 7th pin of charging management chip IC1, the other end of capacitor C1 is connected to the 13th pin of charging management chip IC1; one end of capacitor C2 is connected to the 12th pin of charging management chip IC1, the other end of capacitor C2 is connected to the 13th pin of charging management chip IC1; the positive end of LED lamp is connected to the 11th pin of charging management chip IC1, the negative end of LED lamp is connected to the 6th pin of charging management chip IC1; the positive end of lithium battery is connected to the 8th pin of charging management chip IC1, the negative end of lithium battery is connected to the 13th pin of charging management chip IC1. The on and off state of LED lamp can correspond to whether the battery is being charged.

[0074] In the description of the present invention, it is necessary to understand that the terms "center", "length", "width", "up", "down", "vertical", "horizontal", "inside", "outside", "axial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0075] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "several" means two or more.

[0076] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0077] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A cleaning pump with a built-in motor, characterized in that: Including pump housing, housing cover, battery assembly, motor, pressure switch and flow channel assembly; The pump housing is a box structure with an opening at the top, and the internal cavity of the pump housing includes a first mounting portion for accommodating a battery assembly, a second mounting portion for accommodating a motor, and a third mounting portion for accommodating a pressure switch; a water inlet and a water outlet are provided on the flow channel assembly, and the flow channel assembly allows liquid to flow from the water inlet to the water outlet under the drive of the motor; the housing cover is sealed and installed on the top of the pump housing; The flow channel assembly is connected to the lower surface of the pump housing and is located directly below the second mounting portion.

2. The motor-built-in cleaning pump according to claim 1, characterized in that: The first mounting part, the second mounting part and the third mounting part are arranged in sequence along the length direction of the pump casing. The second mounting part has a mounting frame erected on the outer periphery of the motor. The mounting frame has a crossbeam located between the motor and the casing cover. The wires of the pressure switch pass through the top of the crossbeam and are connected to the lead wires of the motor.

3. The motor-built-in cleaning pump according to claim 2, characterized in that: A wire groove is provided on the top of the crossbeam.

4. The motor-built-in cleaning pump according to claim 1, characterized in that: The mounting surface of the motor is fitted with the inner bottom surface of the pump housing, or a heat-conducting silica gel or a heat-conducting pad is provided between the mounting surface of the motor and the inner bottom surface of the second mounting portion.

5. The motor-built-in cleaning pump according to claim 2, characterized in that: The motor is an outer rotor brushless DC motor.

6. The motor-built-in cleaning pump according to claim 5, characterized in that: The motor includes a stator bracket, a thermal pad, a drive plate assembly, a coil assembly and a rotor assembly. A bearing sleeve is arranged at the center of the stator bracket. The thermal pad, the drive plate assembly and the coil assembly are sequentially mounted on the bearing sleeve. The rotor assembly is located at the outer periphery of the coil assembly. The rotating shaft of the rotor assembly passes through the bearing sleeve. A mounting column is arranged at the outer edge of the stator bracket. The inner bottom surface of the second mounting portion has a first screw hole fixed to the mounting column.

7. The motor-built-in cleaning pump according to claim 6, characterized in that: The mounting frame has a support leg extending to the direction of the stator bracket, and the support leg has a mounting hole matched with the mounting column.

8. The motor-built-in cleaning pump according to claim 1, characterized in that: The flow channel assembly includes a pump body and pump covers covering both sides of the pump body, the water inlet and the water outlet are arranged on both sides of the pump body along the length direction of the pump shell, and the two pump covers are located on both sides of the pump body along the width direction of the pump shell.

9. The motor-built-in cleaning pump according to claim 8, characterized in that: The pump body is provided with a sealing gasket opposite to the pump cover, the pump cover and the sealing gasket form a pressure chamber, an inlet chamber, a power chamber and an outlet chamber which are not connected to each other are formed in the pump body between the two sealing gaskets, a plunger is provided in the power chamber, the plunger is connected to the eccentric wheel installed at the output end of the motor, the two ends of the plunger respectively abut against the two sealing gaskets, the inlet chamber is connected to the water inlet, the outlet chamber is connected to the water outlet, and the two sealing gaskets are provided with an inlet one-way valve connecting the pressure chamber and the inlet chamber, and an outlet one-way valve connecting the pressure chamber and the outlet chamber.

10. The motor-built-in cleaning pump according to claim 9, characterized in that: Two baffles are connected between the two sealing pads, and the baffles and the sealing pads enclose a power cavity; the sealing pads are provided with a plunger hole matched with a top column at the end of the plunger.

11. The motor-built-in cleaning pump according to claim 1, characterized in that: The top outer peripheral surface of the pump housing is provided with a plurality of second screw holes fixed to the housing cover.

12. The motor-built-in cleaning pump according to claim 1, characterized in that: A sealing ring or a sealing gasket or a waterproof glue is provided between the connecting surfaces of the pump casing and the casing cover.

13. The motor-built-in cleaning pump according to claim 1, characterized in that: The battery assembly includes several lithium batteries, a wirelessly rechargeable power management board, and an induction coil fixed on the inside of the pump cover. The two connectors of the induction coil are electrically connected to the power management board. The lithium battery is electrically connected to the power management board. When the pump cover is close to an external charger, the power management board can receive electrical energy through the induction coil and charge the lithium battery.

14. The motor-built-in cleaning pump according to claim 13, characterized in that: The power management board is provided with capacitor C1, capacitor C2, charging management chip IC1 and LED lamp, one end of the induction coil L1 is connected to the 7th pin of the charging management chip IC1, the other end of the induction coil L1 is connected to the 13th pin of the charging management chip IC1, one end of the capacitor C1 is connected to the 7th pin of the charging management chip IC1, and the other end of the capacitor C1 is connected to the 13th pin of the charging management chip IC1; one end of the capacitor C2 is connected to the 12th pin of the charging management chip IC1, and the other end of the capacitor C2 is connected to the 13th pin of the charging management chip IC1; the positive terminal of the LED lamp is connected to the 11th pin of the charging management chip IC1, and the negative terminal of the LED lamp is connected to the 6th pin of the charging management chip IC1; the positive terminal of the lithium battery is connected to the 8th pin of the charging management chip IC1, and the negative terminal of the lithium battery is connected to the 13th pin of the charging management chip IC1.

Images