External brushless pump

Abstract

The invention relates to the technical field of brushless pumps, in particular to an external brushless pump which comprises a brushless pump shell internally provided with a liquid inlet assembly; the driving assembly is arranged in the brushless pump shell, and the driving assembly is used for driving the liquid inlet assembly; the filtering assembly is arranged in the inlet and used for filtering liquid entering the brushless pump shell; the brushless pump has the beneficial effects that the filter plate is installed in the inlet through cooperation of the counter bores and the fixing rings, liquid entering the brushless pump shell is filtered, the filtered liquid drives the stirring plate to rotate through cooperation of the blades and the rotating shaft when passing through the blades, and in the rotating process of the stirring plate, the stirring plate is driven to rotate through the elastically-arranged scrapers; and the surface of the filter plate is scraped, so that filter holes in the filter plate are prevented from being blocked by impurities.

Description

Technical Field

[0001] The invention relates to the technical field of brushless pumps, in particular to an external brushless pump. Background Art

[0002] A brushless pump refers to a machine that uses a direct current of 4.5V to 24V to drive a brushless motor to operate. The rotation of the brushless motor drives the impeller to rotate, thereby increasing the liquid pressure to achieve the function of transmitting the liquid; while an external brushless pump is a machine in which the motor and the housing are separated. The prior art records an external multifunctional cold-start electric fuel pump, which includes a housing, a rotor, a stator, blades, a base and a fuel injector assembly in the housing, a gap between the blades and the inner wall of the housing, an oil inlet channel, a pressure relief channel and at least one auxiliary oil inlet channel are provided on the base, and a drainage channel with one end connected to the auxiliary oil inlet channel and the other end connected to the gap is provided at the base located at the auxiliary oil inlet channel; the fuel injector assembly includes a mounting body, a fuel injector for fuel output is provided on the mounting body, and at least one auxiliary pressure-maintaining fuel injector is provided on the mounting body; the above technical scheme is adopted to provide an external multifunctional cold-start electric fuel pump that can avoid the fuel output from the pump body from being blocked when the pump body stops working, promote the pump body to work intermittently, save energy, prevent clogging, and have stable oil return. In the above-mentioned prior art, oil is sucked in through the oil inlet, but when other liquids are extracted, the liquid may contain some impurities, which can easily enter the interior of the brushless pump through the inlet, causing the impurities to accumulate inside the brushless pump, thus affecting the service life of the brushless pump. Summary of the invention

[0003] The object of the present invention is to provide an external brushless pump to solve the problems raised by the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: An external brushless pump, comprising: A brushless pump housing, wherein a liquid inlet assembly is disposed inside the brushless pump housing, and the liquid inlet assembly includes an inlet disposed at the bottom of the brushless pump housing; A driving assembly, arranged inside the brushless pump housing at a position above the liquid inlet assembly, and used to drive the liquid inlet assembly; The filter assembly is arranged inside the inlet and is used for filtering the liquid entering the housing of the brushless pump. The filter assembly comprises a filter plate arranged inside the inlet.

[0005] Further, the inlet is communicated with the interior of the brushless pump housing; The liquid inlet assembly includes a pump body arranged inside the brushless pump housing at a position above the inlet, a runner is rotatably connected to the inner center of the pump body, grooves are evenly opened around the circumference of the runner, and rollers are accommodated in each groove.

[0006] Further, the driving assembly includes a stator assembly arranged inside the brushless pump housing at a position corresponding to the upper part of the pump body, a rotor assembly is rotatably arranged inside the stator assembly, a driving shaft is arranged on the rotor assembly, the driving shaft is connected to the runner, and one end of the driving shaft passes through the runner and is connected to an impeller; The drive assembly further includes two groups of terminals arranged at the upper end of the brushless pump housing, and the two groups of terminals are electrically connected to the stator assembly; An outlet is disposed at an upper end portion of the brushless pump housing, and the outlet is communicated with the interior of the brushless pump housing.

[0007] Furthermore, a countersunk hole is provided at the lower end of the inlet, a fixing ring is screwed inside the countersunk hole, the filter plate is installed at one end of the fixing ring, and the filter plate is installed inside the inlet through the cooperation of the countersunk hole and the fixing ring.

[0008] Furthermore, a rotating shaft is provided at the center of the filter plate for limited rotation, and one end of the rotating shaft passes through the filter plate and is connected to a plurality of groups of blades distributed in a circumference; The outer surface of the other end of the rotating shaft is connected to a plurality of groups of stirring plates distributed in a circle, and a first receiving groove is provided at the center position of one end of each stirring plate facing the filter plate, and a scraper is inserted inside each of the first receiving grooves, and a plurality of groups of first return springs distributed at intervals are provided between the lower end of each scraper and the inner bottom end of the corresponding first receiving groove, and each scraper is elastically connected to the corresponding stirring plate through the cooperation of the plurality of groups of the first return springs.

[0009] Furthermore, a sink groove is provided at the upper end of each stirring plate at a position corresponding to the scraper, and the sink groove is located on one side of the rotation direction of the stirring plate; Each stirring plate has a hollow rectangular structure, the trough is connected to the inside of the stirring plate, and a side wall of the inside of each stirring plate away from the trough is provided with multiple groups of spaced filter holes, and each filter hole passes through the stirring plate.

[0010] Furthermore, a transmission rod is rotatably arranged at the inner center of each sink, and the outer surface of each transmission rod is connected to a plurality of groups of connection plates distributed in a circumference; A second receiving groove is formed at the end of each connecting plate, a shift plate is inserted in the interior of each second receiving groove, and a second return spring is provided between the end of each shift plate and the inner bottom end of the corresponding second receiving groove, and the shift plate is elastically connected to the corresponding connecting plate through the second return spring; An upper end portion of the sinking groove close to the scraper is provided with an inclined surface.

[0011] Further, a clearance groove is provided at the end of the stirring plate corresponding to the end position of the transmission rod, and a helical gear is installed at the position of the outer surface of the end of the transmission rod corresponding to the clearance groove, and the helical gear is rotatably arranged inside the clearance groove through the cooperation of the transmission rod; A mounting ring is installed on the surface of the filter plate at a position corresponding to the helical gear, and a side wall of the mounting ring facing the helical gear is installed with multiple groups of spaced teeth, each of which is meshed with the helical teeth provided on the surface of the helical gear.

[0012] Furthermore, the bottom end of the stirring plate is set to be open, and a cover plate is provided at the bottom opening of the stirring plate, and the cover plate and the stirring plate can be connected by bolts; Guide grooves are provided on both side walls of the stirring plate near the filter holes, a cleaning plate is slidably arranged between the two sets of the guide grooves, and a third return spring is arranged between the upper ends of both ends of the cleaning plate and the inner top ends of the corresponding guide grooves, and the cleaning plate is elastically arranged inside the stirring plate through the two sets of the third return springs; The side walls on both sides of the stirring plate are internally provided with control components for controlling the elastically arranged cleaning plate to move up and down along the inner side walls of the stirring plate.

[0013] Further, the control assembly includes first airbags arranged inside two groups of the guide grooves, and the two groups of the first airbags are respectively arranged between the lower end surfaces at both ends of the cleaning plate and the corresponding lower end surfaces inside the guide grooves; The control component also includes a third receiving groove opened inside the lower end of the stirring plate corresponding to the position of the cover plate, a second airbag is arranged inside the third receiving groove, an exhaust pipe is opened between the second airbag and the corresponding first airbag, and the second airbag is connected to the first airbag through the exhaust pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention installs the filter plate inside the inlet through the cooperation of the countersunk hole and the fixing ring to complete the filtration of the liquid entering the housing of the brushless pump. When the filtered liquid passes through the blade, the blade and the rotating shaft cooperate to drive the stirring plate to rotate. During the rotation of the stirring plate, the scraper provided elastically scrapes the surface of the filter plate to prevent impurities from clogging the filter holes on the filter plate. 2. When the scraper is rotating, impurities will accumulate on one side of the scraper. At the same time, when the scraper is rotating, it will drive the transmission rod to rotate synchronously. When the transmission rod rotates with the rotating shaft as the center, it will rotate by itself through the cooperation of the mounting ring and the helical gear. During the self-rotation of the transmission rod, the impurities on one side of the scraper are pushed into the sink through the cooperation of the connecting plate and the paddle plate, and then accumulated into the inside of the stirring plate through the sink. 3. Remove the fixing ring from the inside of the inlet by rotating the fixing ring. When cleaning the impurities inside the stirring plate, disassemble the cover plate at the bottom of the stirring plate. After the cover plate is disassembled, the second airbag will no longer be squeezed. At this time, under the action of the third reset spring, the cleaning plate moves down along the guide groove. During the downward movement, impurities adhering to the inner side wall of the stirring plate are scraped off, which facilitates the cleaning of the inner side wall of the stirring plate and prevents the impurities inside the stirring plate from clogging the filter holes and affecting the storage of impurities on the stirring plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the bottom end of the three-dimensional structure of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle; Figure 6 It is a schematic diagram of the interior of the fixing ring structure of the present invention; Figure 7 It is a schematic diagram of the connection between the blade and the stirring plate structure of the present invention; Figure 8 It is a schematic diagram of the internal structure of the stirring plate of the present invention; Fig. 9 for Figure 8 A magnified schematic diagram of the structure at C in the middle; Fig.10 for Fig. 9 A magnified schematic diagram of the structure at D in the middle; Fig.11 It is a side cross-sectional schematic diagram of the stirring plate structure of the present invention; Fig.12 for Fig.11 The enlarged schematic diagram of the structure at E in the middle; Fig.13 for Fig.11 The enlarged schematic diagram of the structure at F in the middle; Fig.14 It is a cross-sectional schematic diagram of the connection between the first airbag and the second airbag structure of the present invention; Fig.15 It is a cross-sectional schematic diagram of the connection between the mounting ring and the stirring plate structure of the present invention; Fig.16 for Fig.15 Enlarged schematic diagram of the structure at G in the middle.

[0016] In the figure: brushless pump housing 1, terminal 2, outlet 3, inlet 4, countersunk hole 5, fixing ring 6, filter plate 7, stirring plate 8, roller 9, impeller 10, rotor assembly 11, stator assembly 12, runner 13, pump body 14, blade 15, rotating shaft 16, filter hole 17, scraper 18, mounting ring 19, cover plate 20, first receiving groove 21, first return spring 22, countersunk groove 23, cleaning plate 24, connecting plate 25, second receiving groove 26, second return spring 27, paddle plate 28, chamfered surface 29, transmission rod 30, third return spring 31, guide groove 32, first air bag 33, third receiving groove 34, second air bag 35, exhaust pipe 36, make way groove 37, helical gear 38, teeth 39. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0018] Embodiment 1: See also Figures 1 to 16 The present invention provides a technical solution: an external brushless pump, comprising: A brushless pump housing 1, wherein a liquid inlet assembly is disposed inside the brushless pump housing 1, and the liquid inlet assembly includes an inlet 4 disposed at the bottom of the brushless pump housing 1; A driving assembly is arranged inside the brushless pump housing 1 at a position above the liquid inlet assembly, and is used to drive the liquid inlet assembly; A filter assembly is arranged inside the inlet 4 and is used to filter the liquid entering the brushless pump housing 1. The filter assembly includes a filter plate 7 arranged inside the inlet 4. The liquid inlet component is driven by the driving component so that the brushless pump housing 1 can extract liquid from the outside of the brushless pump housing 1. When the liquid enters through the inlet 4, the filter component will filter the liquid to prevent impurities in the liquid from entering the interior of the brushless pump housing 1, thereby affecting the life of the brushless pump housing 1.

[0019] Embodiment 2: like Figure 1-Figure 2 as well as Figure 4 As shown, the structure of the external brushless pump disclosed in the second embodiment of the present invention is basically the same as that in the first embodiment, except that: The inlet 4 is communicated with the interior of the brushless pump housing 1; The liquid inlet assembly includes a pump body 14 arranged inside the brushless pump housing 1 at a position above the inlet 4, a runner 13 is rotatably connected to the center of the pump body 14, and grooves are evenly opened in the circumference of the runner 13, and a roller 9 is accommodated in each groove; The driving assembly includes a stator assembly 12 arranged inside the brushless pump housing 1 at a position corresponding to the upper part of the pump body 14, a rotor assembly 11 is rotatably arranged inside the stator assembly 12, a driving shaft is arranged on the rotor assembly 11, the driving shaft is connected to the runner 13, and one end of the driving shaft passes through the runner 13 and is connected to the impeller 10; The drive assembly also includes two groups of terminals 2 arranged at the upper end of the brushless pump housing 1, and the two groups of terminals 2 are electrically connected to the stator assembly 12; The upper end of the brushless pump housing 1 is provided with an outlet 3, and the outlet 3 is communicated with the interior of the brushless pump housing 1; The positive and negative poles of the external power supply are connected to the two groups of terminals 2 respectively. When the terminals 2 are powered on, the stator assembly 12 generates current. At this time, the magnetic field generated by the rotor assembly 11 generates torque under the action of the current and rotates. During the rotation of the rotor assembly 11, the drive shaft drives the wheel 13 to rotate, and the wheel 13 drives the roller 9 to rotate to generate space compression, thereby generating a pressure difference. Under the rotation of the wheel 13, the liquid enters through the inlet 4 and then is ejected through the outlet 3.

[0020] Embodiment three: like Figure 2-Figure 5 As shown, the structure of the external brushless pump disclosed in the third embodiment of the present invention is basically the same as that in the second embodiment, except that: A countersunk hole 5 is provided at the lower end of the inlet 4, a fixing ring 6 is screwed inside the countersunk hole 5, and a filter plate 7 is installed at one end of the fixing ring 6. Through the cooperation between the countersunk hole 5 and the fixing ring 6, the filter plate 7 is installed inside the inlet 4; The inner wall of the countersunk hole 5 and the outer surface of the fixing ring 6 are provided with threads that match each other, and the countersunk hole 5 and the fixing ring 6 are screwed together through the threads, so that the removal of the fixing ring 6 is convenient.

[0021] Embodiment 4: like Figure 6-Figure 9 As shown, the structure of the external brushless pump disclosed in the fourth embodiment of the present invention is basically the same as that in the third embodiment, except that: A rotating shaft 16 is provided at the center of the filter plate 7 for limited rotation. One end of the rotating shaft 16 passes through the filter plate 7 and is connected to a plurality of groups of blades 15 distributed in a circumference. The outer surface of the other end of the rotating shaft 16 is connected to a plurality of groups of stirring plates 8 distributed in a circumference, and a first receiving groove 21 is provided at the center of one end of each stirring plate 8 facing the filter plate 7, and a scraper 18 is inserted in the interior of each first receiving groove 21, and a plurality of groups of first return springs 22 distributed at intervals are provided between the lower end of each scraper 18 and the inner bottom end of the corresponding first receiving groove 21, and each scraper 18 is elastically connected to the corresponding stirring plate 8 through the cooperation of the plurality of groups of first return springs 22; The filter plate 7 is installed inside the inlet 4, and the liquid entering the brushless pump housing 1 is filtered through the filter plate 7. When the filtered liquid passes through the blade 15, the blade 15 and the rotating shaft 16 will drive the stirring plate 8 to rotate. During the rotation of the stirring plate 8, the elastically arranged scraper 18 scrapes the surface of the filter plate 7 to prevent impurities from clogging the filter holes on the filter plate 7.

[0022] Embodiment five: like Figure 7-10 as well as Figure 15-16 As shown, the structure of the external brushless pump disclosed in the fifth embodiment of the present invention is basically the same as that in the fourth embodiment, except that: A sink 23 is provided at the upper end of each stirring plate 8 at a position corresponding to the corresponding scraper 18, and the sink 23 is located on one side of the rotation direction of the stirring plate 8; Each stirring plate 8 is of a hollow rectangular structure, the trough 23 is connected to the inside of the stirring plate 8, and the side wall of the inside of each stirring plate 8 away from the trough 23 is provided with a plurality of groups of filter holes 17 distributed at intervals, and each filter hole 17 penetrates the stirring plate 8; A transmission rod 30 is rotatably disposed at the inner center of each sink 23, and a plurality of groups of connecting plates 25 distributed in a circumference are connected to the outer surface of each transmission rod 30; A second receiving groove 26 is formed at the end of each connecting plate 25, and a shift plate 28 is inserted in the interior of each second receiving groove 26, and a second return spring 27 is provided between the end of each shift plate 28 and the inner bottom end of the corresponding second receiving groove 26, and the shift plate 28 is elastically connected to the corresponding connecting plate 25 through the second return spring 27; The upper end of the sink 23 near the scraper 18 is provided with a chamfered surface 29; A clearance groove 37 is provided at the end of the stirring plate 8 at a position corresponding to the end of the transmission rod 30, and a helical gear 38 is installed at the position corresponding to the clearance groove 37 on the outer surface of the end of the transmission rod 30. The helical gear 38 is rotatably arranged inside the clearance groove 37 through the cooperation of the transmission rod 30; A mounting ring 19 is installed on the surface of the filter plate 7 at a position corresponding to the helical gear 38. A plurality of sets of spaced teeth 39 are installed on a side wall of the mounting ring 19 facing the helical gear 38. Each tooth 39 meshes with the helical teeth provided on the surface of the helical gear 38. When the scraper 18 is rotating, impurities will accumulate on one side of the scraper 18. At the same time, when the scraper 18 is rotating, it will drive the transmission rod 30 to rotate synchronously. When the transmission rod 30 rotates with the rotating shaft 16 as the center, it will rotate by itself through the cooperation of the mounting ring 19 and the helical gear 38. During the rotation of the transmission rod 30, the impurities on one side of the scraper 18 are pushed into the trough 23 through the cooperation of the connecting plate 25 and the paddle plate 28, and are accumulated into the inside of the stirring plate 8 through the trough 23.

[0023] Embodiment six: like Figure 11-Figure 14 As shown, the structure of the external brushless pump disclosed in the sixth embodiment of the present invention is basically the same as that in the fifth embodiment, except that: The bottom end of the stirring plate 8 is set to be open, and a cover plate 20 is set at the bottom opening of the stirring plate 8. The cover plate 20 and the stirring plate 8 can be connected by bolts; Guide grooves 32 are provided on both sides of the inner side wall of the stirring plate 8 near the filter hole 17, a cleaning plate 24 is slidably arranged between the two sets of guide grooves 32, and a third return spring 31 is arranged between the upper ends of both ends of the cleaning plate 24 and the inner top of the corresponding guide groove 32, and the cleaning plate 24 is elastically arranged inside the stirring plate 8 through the two sets of third return springs 31; The side walls of both sides of the stirring plate 8 are provided with control components for controlling the elastically arranged cleaning plate 24 to move up and down along the inner side walls of the stirring plate 8; The control assembly includes first air bags 33 disposed inside two groups of guide grooves 32. The two groups of first air bags 33 are respectively disposed between the lower end surfaces at both ends of the cleaning plate 24 and the inner lower end surfaces of the corresponding guide grooves 32. The control assembly further includes a third receiving groove 34 provided inside the lower end of the stirring plate 8 at a position corresponding to the cover plate 20, a second airbag 35 is provided inside the third receiving groove 34, an exhaust pipe 36 is provided between the second airbag 35 and the corresponding first airbag 33, and the second airbag 35 is connected to the first airbag 33 through the exhaust pipe 36; The fixing ring 6 is taken out from the inside of the inlet 4 by rotating the fixing ring 6. When cleaning the impurities inside the stirring plate 8, the cover plate 20 at the bottom of the stirring plate 8 is disassembled. After the cover plate 20 is disassembled, the second airbag 35 will no longer be squeezed. At this time, under the action of the third return spring 31, the cleaning plate 24 moves downward along the guide groove 32. During the downward movement, impurities adhered to the inner side wall of the stirring plate 8 are scraped off, which facilitates the cleaning of the inner side wall of the stirring plate 8 and prevents the impurities inside the stirring plate 8 from clogging the filter hole 17 and affecting the storage of impurities by the stirring plate 8.

[0024] The specific scheme is as follows: the positive and negative electrodes of the external power supply are connected to the two groups of terminal posts 2 respectively. When the terminal posts 2 are powered on, the stator assembly 12 generates current. At this time, the magnetic field generated by the rotor assembly 11 generates torque under the action of the current and rotates. During the rotation of the rotor assembly 11, the drive shaft drives the wheel 13 to rotate, and the wheel 13 drives the roller 9 to rotate to generate space compression, thereby generating a pressure difference. Under the rotation of the wheel 13, the liquid enters through the inlet 4 and then sprays out through the outlet 3. When the liquid passes through the inlet 4, the filter plate 7 inside the inlet 4 filters the incoming liquid. When the filtered liquid passes through the blade 15, the blade 15 and the rotating shaft 16 cooperate to drive the stirring plate 8 to rotate. During the rotation process, the stirring plate 8 scrapes the surface of the filter plate 7 through the elastically arranged scraper 18 to prevent impurities from clogging the filter holes on the filter plate 7. When the scraper 18 rotates, impurities will accumulate on one side of the scraper 18. At the same time, when the scraper 18 rotates, it will drive the transmission rod 30 to rotate synchronously. When the transmission rod 30 rotates with the rotating shaft 16 as the center, it will rotate by itself through the cooperation of the mounting ring 19 and the helical gear 38. During the rotation of the transmission rod 30, the impurities on one side of the scraper 18 are pushed into the sink 23 through the cooperation of the connecting plate 25 and the paddle 28, and are accumulated into the stirring plate 8 through the sink 23. The fixing ring 6 is taken out from the inside of the inlet 4 by rotating the fixing ring 6. When cleaning the impurities inside the stirring plate 8, the cover plate 20 at the bottom of the stirring plate 8 is disassembled. After the cover plate 20 is disassembled, the second airbag 35 will no longer be squeezed. At this time, under the action of the third return spring 31, the cleaning plate 24 moves downward along the guide groove 32. During the downward movement, impurities adhered to the inner side wall of the stirring plate 8 are scraped off, which facilitates the cleaning of the inner side wall of the stirring plate 8 and prevents the impurities inside the stirring plate 8 from clogging the filter hole 17 and affecting the storage of impurities by the stirring plate 8.

[0025] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An external brushless pump, characterized in that: include: A brushless pump housing (1), wherein a liquid inlet assembly is arranged inside the brushless pump housing (1), and the liquid inlet assembly comprises an inlet (4) arranged at the bottom of the brushless pump housing (1); A drive assembly, arranged inside the brushless pump housing (1) at a position above the liquid inlet assembly, the drive assembly being used to drive the liquid inlet assembly; A filter assembly is arranged inside the inlet (4) and is used to filter liquid entering the interior of the brushless pump housing (1); the filter assembly comprises a filter plate (7) arranged inside the inlet (4).

2. The external brushless pump according to claim 1, characterized in that: The inlet (4) is in communication with the interior of the brushless pump housing (1); The liquid inlet assembly comprises a pump body (14) arranged inside the brushless pump housing (1) at a position above the inlet (4), a rotating wheel (13) being rotatably connected to the center of the pump body (14), the rotating wheel (13) being provided with grooves evenly distributed around its circumference, and a roller (9) being accommodated in each groove.

3. The external brushless pump according to claim 2, characterized in that: The driving assembly comprises a stator assembly (12) arranged inside the brushless pump housing (1) at a position corresponding to the upper portion of the pump body (14); a rotor assembly (11) is rotatably arranged inside the stator assembly (12); a driving shaft is arranged on the rotor assembly (11), the driving shaft is connected to the impeller (13), and one end of the driving shaft passes through the impeller (13) and is connected to the impeller (10); The drive assembly further comprises two groups of terminal posts (2) arranged at the upper end of the brushless pump housing (1), the two groups of terminal posts (2) being electrically connected to the stator assembly (12); An outlet (3) is provided at the upper end of the brushless pump housing (1), and the outlet (3) is communicated with the interior of the brushless pump housing (1).

4. The external brushless pump according to claim 1, characterized in that: A countersunk hole (5) is provided at the lower end of the inlet (4), a fixing ring (6) is screwed inside the countersunk hole (5), and the filter plate (7) is mounted on one end of the fixing ring (6). Through the cooperation between the countersunk hole (5) and the fixing ring (6), the filter plate (7) is mounted inside the inlet (4).

5. The external brushless pump according to claim 4, characterized in that: A rotating shaft (16) is provided at the center of the filter plate (7) for limited rotation, one end of the rotating shaft (16) passes through the filter plate (7) and is connected to a plurality of groups of blades (15) distributed in a circumference; The outer surface of the other end of the rotating shaft (16) is connected to a plurality of groups of stirring plates (8) distributed in a circumferential manner, and a first receiving groove (21) is provided at the center position of one end of each stirring plate (8) facing the filter plate (7), and a scraper (18) is inserted into the interior of each first receiving groove (21), and a plurality of groups of first return springs (22) are arranged between the lower end of each scraper (18) and the inner bottom end of the corresponding first receiving groove (21), and each scraper (18) is elastically connected to the corresponding stirring plate (8) through the cooperation of the plurality of groups of the first return springs (22).

6. The external brushless pump according to claim 5, characterized in that: A sink (23) is provided at the upper end of each stirring plate (8) at a position corresponding to the scraper (18), and the sink (23) is located on one side of the rotation direction of the stirring plate (8); Each of the stirring plates (8) is of a hollow rectangular structure, the trough (23) is connected to the interior of the stirring plate (8), and a side wall of the interior of each of the stirring plates (8) away from the trough (23) is provided with a plurality of groups of filter holes (17) distributed at intervals, and each of the filter holes (17) passes through the stirring plate (8).

7. The external brushless pump according to claim 6, characterized in that: A transmission rod (30) is rotatably disposed at the inner center of each sink (23), and a plurality of groups of connecting plates (25) distributed in a circumference are connected to the outer surface of each transmission rod (30); The end of each connecting plate (25) is provided with a second receiving groove (26), the interior of each second receiving groove (26) is provided with a shifting plate (28) inserted therein, and a second return spring (27) is provided between the end of each shifting plate (28) and the inner bottom end of the corresponding second receiving groove (26), and the shifting plate (28) is elastically connected to the corresponding connecting plate (25) via the second return spring (27); An upper end portion of the sink (23) close to the scraper (18) is provided with a chamfered surface (29).

8. The external brushless pump according to claim 7, characterized in that: The end of the stirring plate (8) is provided with a clearance groove (37) at a position corresponding to the end of the transmission rod (30); a helical gear (38) is installed on the outer surface of the end of the transmission rod (30) at a position corresponding to the clearance groove (37); the helical gear (38) is rotatably arranged inside the clearance groove (37) through the cooperation of the transmission rod (30); A mounting ring (19) is mounted on the surface of the filter plate (7) at a position corresponding to the helical gear (38); a plurality of groups of spaced teeth (39) are mounted on a side wall of the mounting ring (19) facing the helical gear (38); each of the teeth (39) meshes with a helical tooth provided on the surface of the helical gear (38).

9. The external brushless pump according to claim 7, characterized in that: The bottom end of the stirring plate (8) is arranged in an open shape, and a cover plate (20) is arranged at the bottom opening of the stirring plate (8), and the cover plate (20) and the stirring plate (8) can be connected by bolts; Guide grooves (32) are provided on both side walls of the stirring plate (8) at positions close to the filter holes (17); a cleaning plate (24) is slidably arranged between two groups of the guide grooves (32); and third return springs (31) are arranged between the upper ends of both ends of the cleaning plate (24) and the inner top ends corresponding to the guide grooves (32); the cleaning plate (24) is elastically arranged inside the stirring plate (8) via the two groups of the third return springs (31); Control components are provided inside the side walls on both sides of the stirring plate (8) for controlling the elastically arranged cleaning plate (24) to move up and down along the inner side walls of the stirring plate (8).

10. The external brushless pump according to claim 9, characterized in that: The control assembly comprises first air bags (33) arranged inside two groups of the guide grooves (32), and the two groups of the first air bags (33) are respectively arranged between the lower end surfaces at both ends of the cleaning plate (24) and the inner lower end surfaces corresponding to the guide grooves (32); The control assembly further comprises a third receiving groove (34) provided inside the lower end of the stirring plate (8) at a position corresponding to the cover plate (20), a second airbag (35) being provided inside the third receiving groove (34), an exhaust pipe (36) being provided between the second airbag (35) and the corresponding first airbag (33), and the second airbag (35) being connected to the first airbag (33) via the exhaust pipe (36).

Images