Motor pump with long service life in high-load state

Abstract

The invention discloses a long-life motor pump in a high-load state, which comprises a shell assembly, a water pumping piece, a transmission assembly and a driving piece, the shell assembly comprises a water inlet and outlet cover and a shell, the water inlet and outlet cover is arranged at one end of the shell, a double-end water nozzle is arranged on the water inlet and outlet cover, and the driving piece is arranged on the water inlet and outlet cover. A water inlet and a water outlet are formed in the double-end water nozzle, the water pumping piece is arranged on the shell and used for pumping liquid in from the water inlet and pressing the liquid out from the water outlet, the transmission assembly comprises an impeller, a bearing and an eccentric wheel which are sequentially arranged, the impeller is connected with the water pumping piece, and the bearing is connected with the eccentric wheel. The eccentric wheel is sleeved with the bearing, the bearing is sleeved with the impeller, and the driving piece is used for controlling the transmission assembly to drive the water pumping piece to work. According to the motor pump, the bearing is arranged to replace a central spindle to solve the phenomenon that the impeller and the eccentric wheel are worn through after long-term use, and the service life of the motor pump is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of water pumps, and in particular to a motor pump with a long service life under a high load state. Background Art

[0002] Water pumps are machines used to transport liquids and are widely used in various mechanical equipment that need to transport water, such as coffee machines and soybean milk machines. However, due to different equipment manufacturers' different designs for each device, separate control switches are usually used to control the equipment for ease of use, that is, the operation of the entire equipment (including the water pump) is controlled by the equipment power switch, and an additional water outlet switch is set to control the water outlet.

[0003] The water pump in the prior art is provided with a motor, an impeller and an eccentric wheel. The connection between the impeller and the eccentric wheel adopts an impeller-shaft-eccentric wheel connection method. The motor controls the rotation of the eccentric wheel to drive the shaft core and the eccentric wheel to rotate. When the water outlet end of the water pump is back-pressured, the pressure in the piston cavity of the water pump increases. After working for a period of time, the shaft core will wear through the eccentric wheel, and the eccentric wheel assembly hole will be deformed. It is not suitable for working under high load conditions. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a motor pump with a long life under high load conditions.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A motor pump with a long life under high load conditions includes: a shell assembly, a water pumping member, a transmission assembly and a driving member, the shell assembly includes an inlet and outlet water cover and a shell, the inlet and outlet water cover is arranged on one end of the shell, and the inlet and outlet water cover is provided with a double-headed water nozzle, and the double-headed water nozzle is provided with a water inlet and a water outlet, the water pumping member is arranged on the shell, and the water pumping member is used to pump liquid into the water inlet and press it out from the water outlet, the transmission assembly includes an impeller, a bearing and an eccentric wheel which are arranged in sequence, the impeller is connected to the water pumping member, the bearing is sleeved on the eccentric wheel and the impeller is sleeved outside the bearing, and the driving member is used to control the transmission assembly to drive the water pumping member to work.

[0007] In one embodiment, the shell includes a diverter plate, a middle shell and a bottom shell which are arranged in sequence, and the water inlet and outlet cover, the diverter plate, the middle shell and the bottom shell are connected and fixed in sequence.

[0008] In one embodiment, bolts are provided between the water inlet and outlet cover, the diverter plate, the middle shell and the bottom shell, and the bolts pass through the water inlet and outlet cover, the diverter plate, the middle shell and the bottom shell in sequence from the outside of the water inlet and outlet cover.

[0009] In one embodiment, the water inlet and outlet cover is located at one end of the diverter plate, and the water inlet and outlet cover is clamped with the diverter plate, and a water inlet cavity and a water outlet cavity connected to the water inlet and the water outlet are formed between the diverter plate and the water inlet and outlet cover.

[0010] In one embodiment, an umbrella valve and a triangular valve are further provided on the diverter plate, wherein the umbrella valve is used to block and connect the water pump component and the water inlet chamber, and the triangular valve is used to block and connect the water pump component and the water outlet chamber.

[0011] In one embodiment, a raised external protrusion block is provided on one side of the diverter plate near the outer edge, and the external protrusion block is provided along the circumferential direction of the diverter plate. An external boss for abutting against the external protrusion block is provided on one side of the water inlet and outlet cover, and the external boss abuts against the external protrusion block. An installation groove is opened on the external protrusion block along the circumferential direction, and a sealing ring is provided in the installation groove, and the sealing ring abuts against the water inlet and outlet cover.

[0012] In one of the embodiments, an inner protrusion block is further provided on the side of the diverter disc facing the water inlet and outlet cover, and the inner protrusion block is arranged along the circumferential direction of the diverter disc. The water inlet and outlet cover is provided with an inner boss relative to the inner protrusion block, and the inner boss abuts against the inner protrusion block. An annular groove is opened on the inner boss along the circumferential direction, a sealing gasket is arranged in the annular groove, and the sealing gasket abuts against the inner protrusion block.

[0013] In one embodiment, the water pumping member is a three-hole piston, and a plurality of piston cavities are formed on the three-hole piston, and the opening side of each piston cavity is respectively abutted against a side of the diverter plate away from the water inlet and outlet cover.

[0014] In one embodiment, a plurality of the piston chambers are provided with piston columns, the impeller is provided with through holes for the piston columns to pass through, the piston columns on each of the piston chambers pass through the through holes on the impeller respectively, and the driving member is used to drive the impeller to move each of the piston chambers.

[0015] In one embodiment, the driving member is a motor, and the motor is screwed and fixed to one end of the bottom shell away from the middle shell, and the output shaft of the motor extends into the bottom shell and is connected to the eccentric wheel.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] 1. The motor pump with a long life under high load state of the present invention connects the impeller and the eccentric wheel by arranging a bearing instead of a shaft core to solve the problem of the eccentric wheel being worn back by the shaft core connected between the impeller and the eccentric wheel by an inclined shaft core in the prior art. The use of the bearing can make the rotation of the impeller and the eccentric wheel more stable, and the bearing will not cause the impeller and the eccentric wheel to deform and wear out under long-term rotation, so that the motor pump using the transmission assembly is suitable for working under high load state;

[0018] 2. When the motor pump with a long life under high load state of the present invention is working, the rotation of the motor drives the eccentric wheel to rotate, the eccentric wheel is connected to the bearing, the bearing is connected to the impeller to form a reciprocating motion mechanism, the motor rotates one circle, the impeller swings back and forth one circle, the impeller is connected to the three-hole piston, the impeller swings back and forth one circle, the volume of the three-hole piston changes once, the volume of the piston cavity in the three-hole piston increases, the liquid enters the three-hole piston from the water inlet, and when the volume of the piston cavity decreases, the liquid flows out from the water outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the overall structure of a motor pump with a long service life under high load conditions provided by the present invention;

[0021] Figure 2 A schematic diagram of the explosion structure of a motor pump with a long service life under high load conditions provided by the present invention;

[0022] Figure 3 A schematic cross-sectional view of a motor pump with a long service life under a high load state provided by the present invention;

[0023] Figure 4 A schematic diagram of the structure of the assembly of a water pump component and a transmission component in a motor pump with a long service life under high load conditions provided by the present invention;

[0024] Figure 5 A schematic structural diagram of a transmission assembly in a motor pump with a long service life under high load conditions provided by the present invention.

[0025] Description of the drawings: 10. Shell assembly; 11. Water inlet and outlet cover; 111. Double-headed faucet; 1111. Water inlet; 1112. Water outlet; 112. External boss; 113. Internal boss; 1131. Annular groove; 114. Sealing gasket; 12. Shell; 121. Diverter plate; 1211. Water inlet chamber; 1212. Water outlet chamber; 1213. External protrusion block; 12131. Mounting groove; 1214. Internal protrusion block; 1215. Sealing ring; 122. Middle shell; 123. Bottom shell; 20. Transmission assembly; 30. Bolt; 40. Umbrella valve; 50. Triangular valve; 60. Three-hole piston; 61. Piston chamber; 62. Piston column; 70. Impeller; 71. Perforation; 80. Bearing; 90. Eccentric wheel; 100. Motor. DETAILED DESCRIPTION

[0026] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0027] The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] A motor pump with long life under high load conditions, refer to Figure 1 and Figure 2, including a housing assembly 10, a water pumping member, a transmission assembly 20 and a driving member. The housing assembly 10 includes an inlet and outlet cover 11 and a housing 12. The inlet and outlet cover 11 is arranged on one end of the housing 12. The inlet and outlet cover 11 is provided with a double-headed water nozzle 111. The double-headed water nozzle 111 is provided with a water inlet 1111 and a water outlet 1112. The water inlet 1111 and the water outlet 1112 are both connected to the housing 12. The water pumping member is arranged on the housing 12, and is used to pump liquid from the water inlet 1111 and press it out from the water outlet 1112. The driving member is used to control the transmission assembly 20 to drive the water pumping member to work, so as to complete the operation of pumping in and pressing out the liquid.

[0031] Further, refer to Figure 2 and Figure 3 The shell 12 includes a diverter plate 121, a middle shell 122 and a bottom shell 123 arranged in sequence. The water inlet and outlet cover 11 is located at one end of the diverter plate 121. The water inlet and outlet cover 11, the diverter plate 121, the middle shell 122 and the bottom shell 123 are connected and fixed in sequence. It should be noted that in this embodiment, bolts 30 are inserted between the water inlet and outlet cover 11, the diverter plate 121, the middle shell 122 and the bottom shell 123. The bolts 30 pass through the water inlet and outlet cover 11, the diverter plate 121, the middle shell 122 and the bottom shell 123 from the outside of the water inlet and outlet cover 11 in sequence to achieve screw connection and fixation of various parts of the shell 12, thereby forming the overall shell of the motor 100 pump. It should be noted that a screw connection column is arranged in the shell 12, and the screw connection column is located on a side close to the inner wall of the shell 12. The screw connection column is arranged along the length direction of the shell 12. The bolts 30 penetrate into the shell 12 from one side of the water inlet and outlet cover 11 and are inserted into the screw connection column. The inner wall of the screw column is provided with threads threadedly connected to the bolts 30 , and the bolts 30 are threadedly connected to the threads of the inner wall of the screw column to screw and fix the water inlet and outlet cover 11 , the diverter plate 121 , the middle shell 122 and the bottom shell 123 .

[0032] Further, refer to Figure 3 The diverter plate 121 is connected to the water inlet and outlet cover 11, and a water inlet chamber 1211 and a water outlet chamber 1212 are formed between the diverter plate 121 and the water inlet and outlet cover 11, which are respectively connected to the water inlet 1111 and the water outlet 1112. An umbrella valve 40 and a triangular valve 50 are also provided on the diverter plate 121, wherein the umbrella valve 40 is used to block and connect the water pump and the water inlet chamber 1211, and the triangular valve 50 is used to block and connect the water pump and the water outlet chamber 1212.

[0033] Reference Figure 3It should be noted that the diverter disc 121 is fixedly connected with the water inlet and outlet cover 11, and a raised outer protrusion block 1213 is provided on one side of the diverter disc 121 near the outer edge, and the outer protrusion block 1213 is provided along the circumferential direction of the diverter disc 121. An outer boss 112 is provided on one side of the water inlet and outlet cover 11, and the outer boss 112 is in contact with the outer protrusion block 1213. A mounting groove 12131 is provided on the outer protrusion block 1213 of the diverter disc 121, and the mounting groove 12131 is provided along the circumferential direction of the outer protrusion block 1213. A sealing ring 1215 is provided in the mounting groove 12131, and the sealing ring 1215 is provided in an annular shape and is installed in the mounting groove 12131 along the circumferential direction of the mounting groove 12131. The side of the sealing ring 1215 away from the outer protruding block 1213 abuts against the water inlet and outlet cover 11, so that a sealing structure is formed between the water inlet and outlet cover 11 and the diverter plate 121, thereby ensuring the sealing performance of the motor 100 pump.

[0034] Further, refer to Figure 3 , an inner protrusion block 1214 is also provided on one side of the flow diverter plate 121 facing the water inlet and outlet cover 11. The inner protrusion block 1214 is provided in a protruding shape toward one end close to the water inlet and outlet cover 11, and the inner protrusion block 1214 is provided along the circumferential direction of the flow diverter plate 121. The water inlet and outlet cover 11 is provided with an inner boss 113 relative to the inner protrusion block 1214, and the inner boss 113 of the water inlet and outlet cover 11 abuts against the inner protrusion block 1214 of the flow diverter plate 121. An annular groove 1131 is provided on the inner boss 113 of the water inlet and outlet cover 11, and the annular groove 1131 is provided along the circumferential direction of the inner boss 113. A sealing gasket 114 for sealing is arranged in the annular groove 1131, and the sealing gasket 114 is provided in an annular shape, and the sealing gasket 114 abuts against the inner protrusion block 1214 of the flow diverter plate 121. When the diverter plate 121 is installed with the water inlet and outlet cover 11, the outer protrusion block 1213 is firstly abutted with the outer boss 112 and the inner protrusion block 1214 is abutted with the inner boss 113, and then the bolt 30 is passed through the water inlet and outlet cover 11, the diverter plate 121, the middle shell 122 and the bottom shell 123 from one end of the water inlet and outlet cover 11 to achieve connection and fixation. Among them, the sealing ring 1215 and the sealing gasket 114 both ensure the sealing between the diverter plate 121 and the water inlet and outlet cover 11.

[0035] Further, refer to Figure 2 and Figure 3 The umbrella valve 40 disposed on the diverter plate 121 is located in the water inlet chamber 1211. The umbrella valve 40 is a one-way valve that can block and connect the water pump and the water inlet chamber 1211. The triangular valve 50 is located at the water outlet chamber 1212 of the diverter plate 121. The triangular valve 50 is also a one-way valve that can block and connect the water pump and the water inlet chamber 1211.

[0036] Reference Figure 3 and Figure 4The water pumping part is a three-hole piston 60, which is provided with a plurality of piston cavities 61. The opening side of each piston cavity 61 is respectively against the side of the diverter plate 121 away from the water inlet and outlet cover 11. The three-hole piston 60 is connected to the transmission assembly 20, and the driving member is connected to the transmission assembly 20. The driving member is used to drive the transmission assembly 20 to perform a swinging and squeezing motion on each piston cavity 61.

[0037] It should be noted that, refer to Figure 3 and Figure 4 , there are three piston chambers 61, and the three piston chambers 61 are arranged in an array at the same interval. In this embodiment, the number of umbrella valves 40 is the same as the number of piston chambers 61, so there are three umbrella valves 40, and the three umbrella valves 40 are respectively arranged corresponding to the three piston chambers 61. The umbrella valve 40 connects the water inlet chamber 1211 and the three-hole piston 60, so that the liquid enters the water inlet chamber 1211 from the water inlet 1111, and flows into the three piston chambers 61 through the three umbrella valves 40 on the diverter plate 121. The number of triangular valves 50 is one, and the triangular valve 50 is arranged in the middle position of the three-hole piston 60, and is arranged opposite to the water outlet chamber 1212 and the water outlet 1112. The triangular valve 50 is used to press the liquid in the three piston chambers 61 to the water outlet chamber 1212 to flow out through the water outlet 1112, and the liquid in the three piston chambers 61 is evenly pressed onto the diverter plate 121, and flows out through the triangular valve 50, which is a one-way valve.

[0038] Further, refer to Figure 3 and Figure 4 In order to make the motor 100 pump suitable for working under high load conditions, the transmission assembly 20 includes an impeller 70, a bearing 80 and an eccentric wheel 90 arranged in sequence, wherein the impeller 70 is sleeved on the three-hole piston 60, the impeller 70 is a three-leaf structure, and a piston column 62 is arranged on each of the three piston chambers 61. The three blades on the impeller 70 are provided with a through hole 71 for the piston column 62 to pass through, and the piston columns 62 on the three piston chambers 61 are all passed through the three through holes 71 on the impeller 70, so that each piston column 62 and the impeller 70 can be installed. It should be noted that each piston chamber 61 is connected to the impeller 70 through the piston column 62. When the impeller 70 rotates, it will drive each piston column 62 to swing. During the swinging process of the piston column 62, the piston chamber 61 will be squeezed so that the liquid can be pumped into or pressed out of the piston chamber 61.

[0039] Further, refer to Figure 4 and Figure 5The driving member is a motor 100, which is screwed and fixed to one end of the bottom shell 123 away from the middle shell 122. The output shaft of the motor 100 extends into the bottom shell 123 and is connected to the eccentric wheel 90. The bearing 80 is arranged at an angle, and the bearing 80 is sleeved on the eccentric wheel 90, and the impeller 70 is sleeved outside the bearing 80. The motor 100 is used to drive the eccentric wheel 90 and the bearing 80 to rotate, so as to drive the impeller 70 to swing and squeeze each piston chamber 61. The bearing 80 is used to replace the shaft core, so that when the motor 100 pump is powered on, the motor 100 rotates to drive the eccentric wheel 90 to rotate. The eccentric wheel 90 is connected to the bearing 80, and the bearing 80 is connected to the impeller 70 to form a reciprocating motion mechanism. When the motor 100 rotates one circle, the impeller 70 swings back and forth once. The impeller 70 is connected to the three-hole piston 60. When the impeller 70 swings back and forth once, the volume of the three-hole piston 60 changes once, and the volume of the piston chamber 61 in the three-hole piston 60 increases. The liquid enters the three-hole piston 60 from the water inlet 1111. When the volume in the piston chamber 61 decreases, the liquid flows out from the water outlet 1112. The transmission assembly 20 composed of the impeller 70, the bearing 80 and the eccentric wheel 90 can greatly improve the working life of the motor 100 pump under load by increasing the pressure in the piston chamber 61 when the outlet 1112 is back-pressured, increasing the swing resistance of the impeller 70, and the bearing 80 and the eccentric wheel 90 are subjected to a single-axis force, so that the bearing 80 and the impeller 70 will not be deformed or worn out. In this embodiment, by setting the bearing 80 to be connected between the impeller 70 and the eccentric wheel 90, the problem of the impeller 70 and the eccentric wheel 90 being connected by the inclined shaft core to wear out the eccentric wheel 90 in the prior art is solved. The use of the bearing 80 can make the rotation of the impeller 70 and the eccentric wheel 90 more stable, and the bearing 80 will not cause the impeller 70 and the eccentric wheel 90 to be deformed or worn out under long-term rotation, so that the motor 100 pump using the transmission assembly 20 is suitable for working under high-debt conditions.

[0040] It should be noted that when the motor 100 is started, by controlling the rotation of the eccentric wheel 90 and the bearing 80 to drive the impeller 70 to swing and squeeze each piston chamber 61, each piston chamber 61 will reciprocate, that is, stretch and compress. When the piston chamber 61 is in a stretched state, the volume of the piston chamber 61 becomes larger, and the pressure in the piston chamber 61 will be less than the atmospheric pressure, thereby forming a pressure difference. At this time, the umbrella valve 40 will be opened, and the external liquid can be pumped into the piston chamber 61 through the water inlet 1111. After the liquid enters, the volume of the piston chamber 61 becomes smaller, and the pressure in the piston chamber 61 will be less than the atmospheric pressure, thereby forming a pressure difference. At this time, the triangular valve 50 will be opened, and the liquid will be pressed out to the water outlet chamber 1212 and flow out through the water outlet 1112. In this way, under the action of the water pump and the transmission assembly 20, the liquid can be continuously pumped in and out to form a relatively stable flow.

[0041] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A motor pump with a long life under high load conditions, characterized in that: include: A housing component (10), a water pumping component, a transmission component (20) and a driving component, wherein the housing component (10) comprises a water inlet and outlet cover (11) and a housing (12), wherein the water inlet and outlet cover (11) is arranged on one end of the housing (12), and a double-headed water nozzle (111) is arranged on the water inlet and outlet cover (111), and the double-headed water nozzle (111) is provided with a water inlet (1111) and a water outlet (1112), wherein the water pumping component is arranged on the housing (12), and wherein the water pumping component The device is used to allow liquid to be pumped in from the water inlet (1111) and pressed out from the water outlet (1112). The transmission assembly (20) comprises an impeller (70), a bearing (80) and an eccentric wheel (90) which are arranged in sequence. The impeller (70) is connected to the water pumping component. The bearing (80) is sleeved on the eccentric wheel (90) and the impeller (70) is sleeved outside the bearing (80). The driving component is used to control the transmission assembly (20) to drive the water pumping component to work.

2. A motor pump with a long life under high load conditions according to claim 1, characterized in that: The shell (12) comprises a diverter disc (121), a middle shell (122) and a bottom shell (123) which are arranged in sequence, and the water inlet and outlet cover (11), the diverter disc (121), the middle shell (122) and the bottom shell (123) are connected and fixed in sequence.

3. A motor pump with a long life under high load conditions according to claim 2, characterized in that: Bolts (30) are provided between the water inlet and outlet cover (11), the diverter plate (121), the middle shell (122), and the bottom shell (123); the bolts (30) pass through the water inlet and outlet cover (11), the diverter plate (121), the middle shell (122), and the bottom shell (123) in sequence from the outside of the water inlet and outlet cover (11).

4. A motor pump with a long life under high load conditions according to claim 2, characterized in that: The water inlet and outlet cover (11) is located at one end of the diverter plate (121), and the water inlet and outlet cover (11) is snap-connected with the diverter plate (121), and a water inlet cavity (1211) and a water outlet cavity (1212) are formed between the diverter plate (121) and the water inlet and outlet cover (11), which are respectively connected to the water inlet (1111) and the water outlet (1112).

5. A motor pump with a long life under high load conditions according to claim 4, characterized in that: The diverter disc (121) is also provided with an umbrella valve (40) and a triangular valve (50); the umbrella valve (40) is used to block and connect the water pump component and the water inlet chamber (1211); and the triangular valve (50) is used to block and connect the water pump component and the water outlet chamber (1212).

6. A motor pump with a long life under high load conditions according to claim 4, characterized in that: A raised outer protrusion block (1213) is provided on one side of the diverter disc (121) near the outer edge, and the outer protrusion block (1213) is provided along the circumferential direction of the diverter disc (121); an outer boss (112) for abutting against the outer protrusion block (1213) is provided on one side of the water inlet and outlet cover (11); the outer boss (112) abuts against the outer protrusion block (1213); a mounting groove (12131) is provided on the outer protrusion block (1213) along the circumferential direction; a sealing ring (1215) is provided in the mounting groove (12131); and the sealing ring (1215) abuts against the water inlet and outlet cover (11).

7. A motor pump with a long life under high load conditions according to claim 6, characterized in that: The diverter disc (121) is also provided with an inner protrusion block (1214) on one side facing the water inlet and outlet cover (11); the inner protrusion block (1214) is arranged along the circumferential direction of the diverter disc (121); the water inlet and outlet cover (11) is provided with an inner boss (113) relative to the inner protrusion block (1214); the inner boss (113) is in abutment with the inner protrusion block (1214); an annular groove (1131) is provided on the inner boss (113) along the circumferential direction; a sealing gasket (114) is arranged in the annular groove (1131); the sealing gasket (114) is in abutment with the inner protrusion block (1214).

8. A motor pump with a long life under high load conditions according to claim 4, characterized in that: The water pump component is a three-hole piston (60) having a plurality of piston cavities (61) formed thereon, and the opening side of each piston cavity (61) is respectively abutted against a side of the diverter plate (121) away from the water inlet and outlet cover (11).

9. A motor pump with a long life under high load conditions according to claim 8, characterized in that: A piston column (62) is provided on each of the plurality of piston chambers (61); a through hole (71) for the piston column (62) to pass through is provided on the impeller (70); the piston column (62) on each of the piston chambers (61) passes through the through hole (71) on the impeller (70); and the driving member is used to drive the impeller (70) to move each of the piston chambers (61).

10. A motor pump with a long life under high load conditions according to claim 9, characterized in that: The driving member is a motor (100), and the motor (100) is screwed and fixed to one end of the bottom shell (123) away from the middle shell (122), and the output shaft of the motor (100) extends into the bottom shell (123) and is connected to the eccentric wheel (90).

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