Low-noise stable water pump

Abstract

The low-noise stable water pump comprises a pump cover, a pump body and a stator which are detachably connected, the pump body comprises an inner shell, the stator comprises a metal core and an injection molding support, and the metal core comprises a plurality of first abutting faces arranged on the periphery of the inner shell in a surrounding mode. The injection molding support comprises second abutting faces fixedly arranged at the upper end and the lower end of the first abutting face, the first abutting face protrudes out of the second abutting faces in the direction facing the inner shell, the protruding portion forms an anti-glue-overflowing step, and due to the arrangement of the anti-glue-overflowing step, the phenomenon that in the injection molding process of the metal core and the injection molding support, the metal core does not deform in the injection molding process of the metal core and the injection molding support is avoided. And the situation that the assembly effect of the stator and the pump body is affected due to the fact that glue overflows on the first abutting face occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a low-noise and stable water pump. Background Art

[0002] The stator in the water pump is one of the main components of the water pump. The function of the stator is to be fixed in the pump body and drive the rotor through the magnetic field generated by the rotation of the motor. In the prior art, the stator is usually composed of windings and iron cores. When current passes through the windings, a magnetic field is generated inside the stator. This magnetic field interacts with the magnetic field generated by the rotor, thereby generating a rotational torque, causing the moving parts inside the pump to start rotating, and the liquid is sucked in and discharged accordingly.

[0003] The stator includes a metal core and an injection molded bracket, on which a winding is wound. When the stator is formed, the iron core is usually placed in a mold, and then thermoplastic plastic is injected into the mold and wrapped around the iron core, thereby forming the iron core and the injection molded bracket. The pump body includes an outer shell and an inner shell arranged concentrically, and the stator is sleeved on the outer periphery of the inner shell. Since the stator and the inner shell are in a zero-matching relationship, if there are protrusions on the first adjacent surface of the iron core that overflow to the first adjacent surface during the injection molding process, the protrusions on the first adjacent surface need to be manually cleaned later.

[0004] The protrusion on the first adjacent surface has the following hazards. First, the protrusion will cause the stator to be unable to fit with the outer peripheral surface of the inner shell. After the two are forcibly assembled or the protrusion is not cleaned and assembled, the protrusion on the first adjacent surface will cause the inner shell of the pump body to deform or even be crushed.

[0005] Therefore, it is necessary to ensure that the surface of the first adjacent surface of the iron core arranged around the outer periphery of the inner shell is smooth and to ensure that during the injection molding process of the iron core and the injection molding bracket, the first adjacent surface will not be contaminated with protrusions caused by overflowing glue, thereby affecting the assembly effect of the stator and the pump body, and avoiding the extra workload of manually cleaning the protrusions in the later stage. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a low-noise and stable water pump to solve the problems mentioned in the above background technology section.

[0007] The utility model is realized by the following technical solutions:

[0008] A low-noise and stable water pump comprises a detachably connected pump cover, a pump body and a stator, the pump body comprising an inner shell, the stator comprising a metal core and an injection-molded bracket, the metal core comprising a plurality of first adjacent surfaces arranged around the outer periphery of the inner shell, the injection-molded bracket comprising a second adjacent surface fixedly arranged at the upper and lower ends of the first adjacent surface, the first adjacent surface protruding from the second adjacent surface in the direction of the inner shell, and the protruding portion constituting an anti-overflow glue step.

[0009] Furthermore, the height by which the first adjacent surface protrudes from the second adjacent surface is 0.2 mm to 0.8 mm.

[0010] Furthermore, it also includes a connecting shaft, the pump body is fixedly provided with an anti-rotation groove for inserting one end of the connecting shaft, and the pump cover is fixedly provided with a circular groove for inserting the other end of the connecting shaft; the pump body also includes an outer shell and an inner shell, and the stator is arranged between the outer shell and the inner shell; the connecting axis of the anti-rotation groove and the circular groove constitutes a central axis, the outer shell and the inner shell are a circular ring structure, and the central axis of the circular ring is arranged colinearly with the central axis.

[0011] Furthermore, one of the pump cover or the pump body is provided with a plurality of bosses, and the other is provided with grooves for the bosses to be embedded.

[0012] Furthermore, the bosses and the grooves are arranged in a circular array with the central axis as the center.

[0013] Furthermore, the number of the bosses is four.

[0014] Furthermore, the lower surface of the pump cover extends downward to form the boss, and the upper surface of the pump body extends downward to form the groove.

[0015] Furthermore, it also includes a threaded fastener, which passes through the boss and is threadedly connected to the groove.

[0016] Furthermore, the anti-rotation groove is a D-shaped groove.

[0017] Furthermore, the upper surface of the injection molded bracket extends upward to form an annular plate, and the annular plate is provided with a plurality of slots arranged at intervals. The pump body also includes a connecting plate, which connects the upper ends of the outer shell and the inner shell. A plurality of reinforcing strips are fixed between the connecting plate and the side wall of the inner shell. The reinforcing strips are embedded in the slots and are used to prevent the stator from rotating in the pump body.

[0018] The beneficial effects of the utility model are: a low-noise and stable water pump, comprising a detachably connected pump cover, a pump body and a stator, the pump body comprising an inner shell, the stator comprising a metal core and an injection molding bracket, the metal core comprising a plurality of first adjacent surfaces arranged around the outer periphery of the inner shell, the injection molding bracket comprising a second adjacent surface fixedly arranged at the upper and lower ends of the first adjacent surface, the first adjacent surface protruding from the second adjacent surface toward the inner shell, the protruding portion constituting an anti-overflow glue step, by the provision of the anti-overflow glue step, it is avoided that during the injection molding process of the metal core and the injection molding bracket, there is overflow of glue on the first adjacent surface, resulting in the occurrence of a situation affecting the assembly effect of the stator and the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the utility model.

[0020] Figure 2 It is a central cross-sectional view of the utility model.

[0021] Figure 3 It is an exploded view of the utility model.

[0022] Figure 4 It is a three-dimensional diagram of the stator of the utility model.

[0023] Figure 5 This is an exploded view of the stator of the utility model.

[0024] Figure 6 This is a schematic diagram of the assembly of the pump cover and the pump body of the utility model.

[0025] Figure 7 This is a schematic diagram of the assembly of the pump body and stator of the utility model.

[0026] The above drawings include the following reference numerals:

[0027] 1. Pump cover; 11. Boss; 12. Circular groove; 2. Pump body; 21. Outer shell; 22. Inner shell; 23. Groove; 24. Anti-rotation groove; 25. Connecting plate; 26. Reinforcement strip; 27. Bottom plate; 3. Stator; 31. Metal core; 311. First adjacent surface; 32. Injection molding bracket; 321. Second adjacent surface; 322. Ring plate; 3221. Slot; 33. Anti-overflow step; 4. Sealing ring; 5. Central axis. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0029] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0030] Reference Figures 1 to 7 As shown, a low-noise and stable water pump comprises a detachably connected pump cover 1, a pump body 2 and a stator 3, the pump body 2 comprises an inner shell 22, and is characterized in that: the stator 3 comprises a metal core 31 and an injection-molded bracket 32, the metal core 31 comprises a plurality of first adjacent surfaces 311 arranged around the outer periphery of the inner shell 22, the injection-molded bracket 32 ​​comprises a second adjacent surface 321 fixedly arranged at the upper and lower ends of the first adjacent surface 311, the first adjacent surface 311 protrudes from the second adjacent surface 321 toward the direction of the inner shell 22 The protruding portion constitutes an anti-glue overflow step 33. Through the setting of the anti-glue overflow step 33, during the injection molding process, the core of the mold is abutted against and filled into the inner peripheral space of the metal core 31. The core of the mold blocks the inner periphery of the metal core 31, and the core of the mold extends and abuts against the anti-glue overflow step 33, thereby avoiding the situation where glue overflows from the first adjacent surface 311 during the injection molding process of the metal core 31 and the injection molding bracket 32, thereby affecting the assembly effect of the stator 3 and the pump body 2.

[0031] As a preferred solution, the metal core 31 is made of iron material. Figure 4 As shown, the height of the first adjacent surface 311 protruding from the second adjacent surface 321 is 0.2 mm to 0.8 mm, which is the height of the anti-overflow glue step 33. If the height of the anti-overflow glue step 33 is too low, it cannot effectively prevent the overflow of glue, and the thermoplastic plastic may penetrate into the first adjacent surface 311; if the height of the anti-overflow glue step 33 is too high, the second adjacent surface 321 cannot be adjacent to and embraced by the inner shell 22.

[0032] refer to Figure 7 As shown, the upper surface of the injection-molded bracket 32 ​​extends upward to form an annular plate 322, and the annular plate 322 is provided with a plurality of slots 3221 arranged at intervals. The pump body 2 also includes a connecting plate 25 connecting the outer shell 21 and the upper end of the inner shell 22. A reinforcing strip 26 is fixed between the connecting plate 25 and the inner shell 22. The reinforcing strip 26 located on the connecting plate 25 is embedded in the slot 3221, thereby preventing the stator 3 from rotating in the pump body 2.

[0033] refer to Figure 6 As shown, one of the pump cover 1 or the pump body 2 is provided with a plurality of bosses 11, and the other is provided with a groove 23 for the bosses 11 to be embedded. In the present utility model, the lower surface of the pump cover 1 extends downward to form the bosses 11, and the upper surface of the pump body 2 extends downward to form the grooves 23. Preferably, the number of bosses 11 is four, and they are arranged in a circumferential array on the outer periphery of the pump cover 1, and the threaded fastener passes through the bosses 11 and is threadedly connected with the grooves 23.

[0034] It also includes a connecting shaft (not shown in the drawings), which is used to install the rotor (this structure belongs to the existing technology of the water pump), and the two ends of the connecting shaft are respectively inserted into the pump cover 1 and the pump body 2, and the pump body 2 is fixed with an anti-rotation groove 24 for one end of the connecting shaft to be inserted, and the pump cover 1 is fixed with a circular groove 12 for the other end of the connecting shaft to be inserted. Among them, the anti-rotation groove 24 includes but is not limited to a D-type groove, which is easy to process and shape, and the plane section of the D-type groove cooperates with the plane section of the connecting shaft to prevent the connecting shaft from rotating in the anti-rotation groove 24. Since the anti-rotation groove 24 is arranged on the bottom plate 27 of the inner shell 22, during installation, the connecting shaft is first inserted into the anti-rotation groove 24, and then the other end of the connecting shaft is simultaneously inserted into the circular groove 12 during the process of assembling the pump cover 1 and the pump body 2. Since the pump cover 1 has a circular groove, there is no need to rotate the connecting shaft during the assembly of the connecting shaft and the pump cover 1, and the pump cover 1 and the connecting shaft can be assembled at any angle. Moreover, since the two ends of the connecting shaft are respectively limited by the anti-rotation groove 24 and the circular groove, the connecting shaft will not be offset during use, resulting in abnormal operation of the rotor, friction and abnormal noise caused by collision between the rotor and the inner shell 22, etc., so that the water pump maintains a low noise state during use, and the assembler does not need to rotate the matching relationship between the pump cover 1 and the pump body 2 multiple times to facilitate the installation of the connecting shaft, thereby improving the assembly efficiency of the water pump.

[0035] Among them, the connecting axis of the anti-rotation groove 24 and the circular groove 12 constitutes the central axis 5, the outer shell 21 and the inner shell 22 are annular structures, the central axis of the annular structure is arranged colinearly with the central axis 5, and the boss 11 and the groove 23 are arranged in a circular array with the central axis 5 as the center. The outer shell 21, the inner shell 22, the boss 11 and the groove 23 are coaxially arranged in the center, which further improves the rotation of the rotor and avoids friction and abnormal noise caused by the collision between the rotor and the inner shell 22. The central coaxial arrangement can also improve the assembly efficiency of the water pump, ensure the center alignment, and prevent the misalignment of the connection of various components from causing abnormal noise during the operation of the water pump.

[0036] The above structure can reduce abnormal noises during use of the water pump, ensure the alignment between the pump cover 1 and the pump body 2, and ensure that the anti-rotation groove 24 is coaxially arranged with the circular groove 12 during assembly and use. There are four grooves 23, nuts are embedded in the inner wall of the groove 23, and finally the pump cover 1 and the pump body 2 are locked with threaded fasteners to ensure an excellent assembly effect.

[0037] A sealing ring 4 is sandwiched between the pump cover 1 and the pump body 2 , and the sealing ring 4 is used to prevent water from seeping into the connection between the pump cover 1 and the pump body 2 .

[0038] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-noise and stable water pump, comprising a detachably connected pump cover (1), a pump body (2) and a stator (3), wherein the pump body (2) comprises an inner shell (22), characterized in that: The stator (3) comprises a metal core (31) and an injection-molded bracket (32); the metal core (31) comprises a plurality of first adjacent surfaces (311) arranged around the outer periphery of the inner shell (22); the injection-molded bracket (32) comprises a second adjacent surface (321) fixedly arranged at the upper and lower ends of the first adjacent surface (311); the first adjacent surface (311) is arranged to protrude from the second adjacent surface (321) in the direction of the inner shell (22); the protruding portion constitutes an anti-overflow glue step (33).

2. A low-noise and stable water pump according to claim 1, characterized in that: The height of the first adjacent surface (311) protruding from the second adjacent surface (321) is 0.2 mm to 0.8 mm.

3. A low-noise and stable water pump according to claim 1 or 2, characterized in that: It also includes a connecting shaft, the pump body (2) is fixedly provided with an anti-rotation groove (24) for inserting one end of the connecting shaft, and the pump cover (1) is fixedly provided with a circular groove (12) for inserting the other end of the connecting shaft; The pump body (2) further comprises an outer shell (21) and an inner shell (22), and the stator (3) is arranged between the outer shell (21) and the inner shell (22); The connecting axis of the anti-rotation groove (24) and the circular groove (12) forms a central axis (5); the outer shell (21) and the inner shell (22) are annular structures, and the central axis of the annular structure is arranged colinearly with the central axis (5).

4. A low-noise and stable water pump according to claim 3, characterized in that: One of the pump cover (1) or the pump body (2) is provided with a plurality of bosses (11), and the other is provided with a groove (23) for the bosses (11) to be embedded.

5. A low-noise and stable water pump according to claim 4, characterized in that: The bosses (11) and the grooves (23) are arranged in a circular array with the central axis (5) as the center.

6. A low-noise and stable water pump according to claim 5, characterized in that: The number of the bosses (11) is four.

7. A low-noise and stable water pump according to claim 5, characterized in that: The lower surface of the pump cover (1) extends downward to form the boss (11), and the upper surface of the pump body (2) extends downward to form the groove (23).

8. A low-noise and stable water pump according to claim 5, characterized in that: It also includes a threaded fastener, which passes through the boss (11) and is threadedly connected to the groove (23).

9. A low-noise and stable water pump according to claim 5, characterized in that: The anti-rotation groove (24) is a D-shaped groove.

10. A low-noise and stable water pump according to claim 3, characterized in that: The upper surface of the injection-molded bracket (32) extends upward to form an annular plate (322), and the annular plate (322) is provided with a plurality of slots (3221) arranged at intervals. The pump body (2) also includes a connecting plate (25), and the connecting plate (25) connects the upper ends of the outer shell (21) and the inner shell (22). A plurality of reinforcing strips (26) are fixed between the connecting plate (25) and the side wall of the inner shell (22), and the reinforcing strips (26) are embedded in the slots (3221) and are used to prevent the stator (3) from rotating in the pump body (2).

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