A water pump

Abstract

The present invention provides a water pump, comprising a first shell, a second shell, an impeller and a power mechanism, wherein the first shell is rotatably connected to the second shell, a first opening is provided at one end of the first shell, a second opening is provided at one end of the second shell, the impeller is provided in the first opening, the power mechanism is provided in the second opening, a first step position is provided on the inner wall of the first opening, one end of the power mechanism is limitedly connected to the first step position and the power mechanism can rotate relative to the surface of the first step position; the power mechanism is used to drive the impeller to rotate, and after the power mechanism is limitedly connected to the first step position, the first opening is closed and connected with the second opening. In the present invention, the first shell can be rotatably connected to the second shell, so that the two shell structures can be easily disassembled and assembled, and the internal structure of the shell can be repaired and cleaned more conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a water pump. Background Art

[0002] At present, water pumps are more and more widely used by people, and the power mechanism that drives the impeller to rotate is one of the indispensable mechanisms of the water pump. When the water pump is running, the motor in the power mechanism drives the impeller to rotate, and the water is discharged through the high-speed rotating impeller, which plays a role in pushing water. After working for a long time, the impeller is subjected to high water pressure, which is a test for the transmission capacity and working efficiency of the power mechanism. It can be seen that the structure of the power mechanism plays a vital role in the operation of the water pump. However, due to the limited structure of the water pump in the prior art, it is difficult to quickly and conveniently disassemble and assemble the water pump structure, resulting in the user being unable to timely maintain the power mechanism or even the impeller inside the water pump, which seriously affects the service life of the water pump.

[0003] Therefore, a new technical solution is provided to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a water pump, aiming to solve the technical problem that the power mechanism of the existing water pump is difficult to disassemble, assemble and replace during use.

[0005] The technical solution designed by the present invention is as follows:

[0006] A water pump, characterized in that it includes a first shell, a second shell, an impeller and a power mechanism, the first shell is rotatably connected to the second shell, a first opening is provided at one end of the first shell, and a second opening is provided at one end of the second shell, the impeller is provided in the first opening, and the power mechanism is provided in the second opening, a first step position is provided on the inner wall of the first opening, one end of the power mechanism is limitedly connected to the first step position and the power mechanism can rotate relative to the surface of the first step position; the power mechanism is used to drive the impeller to rotate, and after the power mechanism is limitedly connected to the first step position, the first opening and the second opening are closed and connected.

[0007] The water pump described above, wherein the first opening and the second opening are both circular hole-shaped, and the first step position is arranged in a ring shape in the first opening and extends in the circumferential direction of the first opening; a second step position is arranged on the inner wall of the first opening, and the second step position is arranged in a ring shape after extending in the circumferential direction of the first opening, and the inner diameter of the second step position is the same as the outer diameter of the first step position; at least one baffle is also arranged on the inner wall of the first opening, and the baffle plate is extended in the radial direction of the first opening, and a first gap is arranged between the bottom surface of the baffle plate and the surface of the second step position.

[0008] The water pump, wherein a first connecting protrusion is protruding from the outside of the second opening of the second shell, the first connecting protrusion is annular, the first connecting protrusion is connected to the first shell, and the inner diameter of the first connecting protrusion is larger than the inner diameter of the first opening; at least one matching protrusion is provided on the outer wall of the first connecting protrusion, and a second gap is provided between the matching protrusion and the surface of the second shell.

[0009] In the water pump, the width of the second gap is not less than the thickness of the baffle; and the thickness of the matching protrusion is not greater than the width of the first gap.

[0010] In the water pump, a third opening is provided at the other end of the second shell, and the third opening is in the shape of a circular hole. When the third opening is connected to the second opening, the second shell has a tubular structure.

[0011] The water pump, wherein the third opening is connected to an end cover and a locking piece, the locking piece is detachably connected to the outer wall of the third opening, the edge of the end cover is provided with a first groove, the first groove runs through the end cover, buckles are symmetrically provided on both sides of the first groove, the buckles extend toward the second opening, the buckles are clamped on the locking piece, and the first groove is adapted to the locking piece;

[0012] The locking member includes a clamping portion and a through hole portion, the through hole portion is connected below the clamping portion, the clamping portion includes an upper clamping plate and a lower clamping plate, the outer wall of the third opening is clamped between the upper clamping plate and the lower clamping plate to connect the locking member to the second shell, and the buckle is clamped on the end surface of the through hole portion facing the second opening; when the end cover is connected to the third opening, the edge of the through hole portion is covered in the first groove.

[0013] The water pump described above, wherein the impeller includes a first disk and a plurality of blades surrounding the center of the disk and evenly distributed on the front side of the disk, the blades include a first arc segment, a second arc segment and a third arc segment, the first arc segment is close to the center of the circle, the two ends of the second arc segment are respectively connected to the first arc segment and the third arc segment, the top height of the first arc segment and the top height of the third arc segment are both higher than the top height of the second arc segment, the lengths of the second arc segment and the third arc segment are both greater than the length of the first arc segment, and the length of the second arc segment is not less than the length of the third arc segment.

[0014] The water pump described above, wherein the power mechanism includes a pump shaft, an electric motor and a first mounting seat, the pump shaft is drivingly connected to the electric motor, the electric motor is mounted on the upper surface of the first mounting seat, the first mounting seat is provided with a first axial hole, one end of the pump shaft passes through the first axial hole and is connected to the impeller; the lower surface of the first mounting seat is limit-connected to the first step position and can rotate relative to the first step position.

[0015] The water pump, wherein the motor includes an inner liner, a stator and a rotor, the stator is mounted on the inner wall of the second outer shell, the stator is a tubular structure, the inner liner is sleeved inside the stator, the rotor is mounted inside the inner liner, one end of the inner liner is connected to the upper surface of the first mounting seat, and the pump shaft is tightly connected to the rotor.

[0016] In the water pump, a plurality of second connecting protrusions are evenly distributed radially on the surface of the inner tank, and the second connecting protrusions extend along the axial direction of the inner tank.

[0017] Beneficial effects of the present invention: the first shell of the present invention can be rotatably connected to the second shell, so that the two shell structures can be easily disassembled and assembled, and the internal structure of the shell can be repaired and cleaned more conveniently. Compared with the prior art, the present invention achieves the technical effect of facilitating the replacement of the power mechanism of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2 It is a left view of the structure of the first shell in the present invention.

[0020] Figure 3 It is a structural sectional view of the second shell in the present invention.

[0021] Figure 4 It is a left side view of the structure of the second shell in the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the second shell in the present invention.

[0023] Figure 6 It is a front view of the stator of the present invention.

[0024] Figure 7 It is a top view of the iron sheet structure in the present invention (with dimension markings).

[0025] Figure 8 This is a schematic diagram of the connection principle of the core substrate in the present invention (with dimension markings).

[0026] Fig. 9 It is an enlarged structural schematic diagram of the second groove structure in the present invention (with dimension markings).

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the impeller in the present invention.

[0028] Numbers in the figure: 1, first housing; 2, second housing; 3, impeller; 4, power mechanism; 11, first opening; 111, first step position; 112, second step position; 113, baffle; 21, second opening; 211, first connecting protrusion; 2111, matching protrusion; 22, third opening; 23, end cover; 24, locking member; 231, first groove; 2311, buckle; 241, clamping part; 242, through hole; 2411, upper clamping plate; 2412, lower clamping plate; 12, water outlet; 13, water inlet; 14, water diversion groove; 41, motor; 42, first mounting seat; 411, liner; 4111, second connecting protrusion; 412, stator; 412a, core substrate; 4121 a, iron sheet; 4121b, inner arc segment; 4122b, connecting portion; 4123b, outer arc segment; 4123c, second groove structure; 4121c, third gap; 31, first disc; 32, blade; 321, first arc segment; 322, second arc segment; 323, third arc segment; 3211, top surface; 3212, vertical end surface; 3213, first arc side surface; 3214, second arc side surface; 5, filter cover. DETAILED DESCRIPTION

[0029] The 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.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions 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 limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0034] Please refer to Figure 1 , Figure 2 and Figure 3 In order to solve the above technical problems, the present invention provides a water pump, comprising a first housing 1, a second housing 2 ( Figure 1The first housing 1 is rotatably connected to the second housing 2. A first opening 11 is provided at one end of the first housing 1, and a second opening 12 is provided at one end of the second housing 2. The impeller 3 is provided in the first opening 11, and the power mechanism 4 is provided in the second opening 12. A first step position 111 is provided on the inner wall of the first opening 11. One end of the power mechanism 4 is limitedly connected to the first step position 111 and the power mechanism 4 can rotate relative to the surface of the first step position 111. The power mechanism 4 is used to drive the impeller 3 to rotate. After the power mechanism 4 is limitedly connected to the first step position 111, the first opening 11 and the second opening 12 are closed and connected. In the present application, since the first housing 1 can be rotatably connected to the second housing 2, the two housing structures can be conveniently disassembled and assembled, and the internal structures of the two housings can be more conveniently repaired and cleaned, thereby improving the service life and safety of the whole machine. And because the power mechanism 4 is also connected to the step position of the first shell 1, the power mechanism 4 can be disassembled and assembled using only corresponding tools. Compared with the prior art, the present application achieves the technical effect that the power mechanism 4 of the water pump can be disassembled and assembled and is easy to replace.

[0035] Specifically, the first opening 11 and the second opening 12 are both circular holes. The first step 111 is arranged in a ring shape in the first opening 11 along the circumferential direction of the first opening 11. A second step 112 is arranged on the inner wall of the first opening 11. The second step 112 is arranged in a ring shape after extending in the circumferential direction of the first opening 11. The inner diameter of the second step 112 is the same as the outer diameter of the first step 111. At least one baffle 113 is also arranged on the inner wall of the first opening 11. The baffle 113 is extended in the radial direction of the first opening 11, and a first gap (not shown in the figure) is arranged between the bottom surface of the baffle 113 and the surface of the second step 112.

[0036] See also Figure 3 , Figure 4 and Figure 5The second opening 12 of the second housing 2 is provided with a first connection protrusion 211 protruding from the outside. The first connection protrusion 211 is annular and connected to the first housing 1. The inner diameter of the first connection protrusion 211 is larger than the inner diameter of the first opening 11. At least one matching protrusion 2111 is provided on the outer wall of the first connection protrusion 211. A second gap (not shown in the figure) is provided between the matching protrusion 2111 and the surface of the second housing 2. When the present structure is in use, after the power mechanism 4 is connected to the first step position 111, the matching protrusion 2111 on the second housing 2 is connected to the second step position 112, and the first housing 1 and the second housing 2 are rotated relative to each other, so that the matching protrusion 2111 slides on the second step position 112 until the matching protrusion 2111 is located at the first gap, and at the same time, the baffle 113 is located at the second gap, the first gap limits the upper surface and lower surface of the matching protrusion 2111, and the second gap limits the upper surface and lower surface of the baffle 113, so as to achieve the technical effect of the clamping, so that the first housing 1 and the second housing 2 complete the closed connection between the openings, thereby realizing the rotatable connection between the first housing 1 and the second housing 2. It should be noted that the width of the second gap is not less than the thickness of the baffle 113; the thickness of the matching protrusion 2111 is not greater than the width of the first gap. Of course, in practical applications, multiple baffles 113 and matching protrusions 2111 should be provided to enhance the connection stability of the first housing 1 and the second housing 2.

[0037] The other end of the second housing 2 is provided with a third opening 22, which is a circular hole. After the third opening 22 is connected to the second opening 12, the second housing 2 is in a tubular structure. The third opening 22 is connected with an end cover 23 and a locking member 24, which is detachably connected to the outer wall of the third opening 22. The edge of the end cover 23 is provided with a first groove 231, which passes through the end cover 23. Buckles 2311 are symmetrically provided on both sides of the first groove 231, which extend toward the second opening 12. The buckle 2311 is clamped on the locking member 24, and the first groove 231 is adapted to the locking member 24. Specifically, the locking member 24 includes a clamping portion 241 and a through hole portion 242, the through hole portion 242 is connected below the clamping portion 241, the clamping portion 241 includes an upper clamping plate 2411 and a lower clamping plate 2412, the outer wall of the third opening 22 is clamped between the upper clamping plate 2411 and the lower clamping plate 2412 so that the locking member 24 is connected to the second housing 2, and the buckle 2311 is clamped on the end surface of the through hole portion 242 facing the second opening 12. When the end cover 23 is connected to the third opening 22, the edge of the through hole portion 242 is covered in the first groove 231.

[0038] In this structure, a locking member 24 is first connected to the third opening 22, and then the buckle 2311 on the end cover 23 is connected to the locking member 24. Of course, the other parts of the end cover 23 are connected to the second housing 2. The advantage of this structure is that compared with directly connecting the end cover 23 to the third opening 22, this structure increases the connection stability between the end cover 23 and the second housing 2. When disassembling, the locking member 24 must be separated from the outer wall of the third opening 22 first, so that the end cover 23 is removed together. The through hole 242 of the locking member 24 can be used for purposes such as threading wires.

[0039] In this embodiment, the aperture of the third opening 22 is larger than the apertures of the second openings, so as to provide a mounting position for the fixed installation of the power mechanism 4. For details, please refer to the technical solution of the power mechanism 4 below.

[0040] In this embodiment, the first housing 1 is provided with a water outlet 12 and a water inlet 13, and the water outlet 12, the water inlet 13 and the first opening 11 are connected. The water inlet 13 is protrudingly arranged at the other end of the first housing 1 for pumping water into the inside of the first housing 1 on one side, and the water outlet 12 is protrudingly arranged at the top of the first housing 1 for draining water on the top of the first housing 1. A water diversion groove 14 is arranged inside the first housing 1, and the water diversion groove 14 is extended along the circumferential direction of the water inlet 13 so that the two ends of the water diversion groove 14 are connected. The groove bottom depth of one end of the water diversion groove 14 is less than the groove bottom depth of the other end of the water diversion groove 14, and the other end of the water diversion groove 14 is directly connected to the water outlet 12. In this structure, the cross section of the water diversion groove 14 is annular, but the groove bottom depth of one end is less than the groove bottom depth of the other end, so that the groove bottom depth value of the water diversion groove 14 gradually increases when the water diversion groove 14 is extended. The advantage of this structure is that when the water flow is sent from the water inlet 13 to the water outlet 12 by the impeller 3, the other end of the water diversion groove 14 connected to the water outlet 12 has a large groove bottom depth, which can reduce the water pressure at this place, increase the water flow rate, and increase the water flow rate. If the groove bottom depth at this place remains unchanged, since the water pump is under the action of the impeller 3 to transport water upward out of the first shell 1, the water is attracted by the center of the earth and moves downward. The water flow rate is small and cannot be discharged due to the squeezing of the inner wall of the first shell 1, which will apply greater pressure to the impeller 3, and it is a challenge to the power mechanism 4 that drives the impeller 3 to rotate. Therefore, increasing the water flow rate and flow rate in the water outlet direction can reduce the pressure of the impeller 3 and enhance the efficiency of pumping. In order to solve the above technical problems, the present application adds a special water diversion groove 14 structure.

[0041] See also Figure 1 , Figures 6 to 9In this embodiment, the power mechanism 4 includes a pump shaft (not shown), a motor 41 and a first mounting seat 42. The pump shaft is in transmission connection with the motor 41, and the motor 41 is mounted on the upper surface of the first mounting seat 42. The first mounting seat 42 is provided with a first shaft hole (not shown in the figure), and one end of the pump shaft passes through the first shaft hole and is connected to the impeller 3. The lower surface of the first mounting seat 42 is limitedly connected to the first step position 111 and can rotate relative to the first step position 111. The first mounting seat 42 is annular.

[0042] As mentioned above, the aperture of the third opening 22 is larger than the aperture of the second opening. The purpose is that when the motor 41 is mounted on the first mounting seat 42, in order to further connect and fix the first mounting seat 42 and the motor 41 to the second housing 2, the combined connection structure of the motor 41 and the first mounting seat 42 needs to be connected to the outer wall of the second housing 2 around the second opening 12, and the annular first mounting seat 42 needs to be connected to the outer wall of the end of the second housing 2, so it is necessary to reserve enough second housing 2 structure around the second opening 12 to connect it. And installing the first mounting seat 42 at the end of the second housing 2 can seal the second opening 12 of the second housing 2 to prevent water from splashing or flowing in and causing the motor 41 to short-circuit. It is also preferred to make the outer diameter of the part where the motor 41 needs to be connected to the first housing 1 match the aperture of the second opening 12.

[0043] In this embodiment, the motor 41 includes an inner shell 411, a stator 412 and a rotor (not shown in the figure). The stator 412 is installed on the inner wall of the second housing 2. The stator 412 is a tubular structure. The inner shell 411 is sleeved in the stator 412. The rotor is installed inside the inner shell 411. One end of the inner shell 411 is connected to the upper surface of the first mounting seat 42. The pump shaft is tightly connected to the rotor. The stator includes a plurality of annular iron core substrates 412a with overlapping surfaces. The iron core substrate 412a includes a plurality of iron sheets 4121a connected at the ends. The iron core substrate 412 a is provided with a first end (not marked in the figure) and a second end (not marked in the figure); the iron sheet 4121a includes an inner arc segment 4121b, a connecting portion 4122b and an outer arc segment 4123b, the inner arc segment 4121b and the outer arc segment 4123b share a circle center, a plurality of the outer arc segments 4123b are connected to form an outer ring of the iron core substrate 412a, a plurality of the inner arc segments 4121b surround an inner ring of the iron core substrate 412a, and the two ends of the connecting portion 4122b are respectively connected to the outer arc segment 4123b and the inner arc segment 4123b. The outer arc segment 4122b is connected to the ends of the two adjacent outer arc segments 4123b to form a second groove structure 4123c, and a third gap 4121c is provided between the ends of the two adjacent inner arc segments 4121b; the outer arc segment 4123b of the iron sheet 4121a at the first end is detachably connected to the outer arc segment 4123b of the iron sheet 4121a at the second end; the inner diameter of the tubular structure is 18.80-21.80mm, and the outer diameter of the tubular structure is 31.80-34.80mm. In practical applications, the annular iron core substrate 412a is made by first connecting the plurality of the above-mentioned iron sheets 4121a through the linear connection between the outer arc segments 4123b, and then changing the angle between the outer arc segments 4123b on the two adjacent iron sheets, so that the iron core substrate 412a gradually becomes curved. It should be noted that after the core substrate 412a is bent, the outer arc segments 4123b of the iron sheets 4121a at both ends of the original linear core substrate 412a need to be in a detachable connection state and can abut against each other. It is also necessary to ensure that the two adjacent outer arc segments 4123b at other positions are not completely connected, that is, there is a gap, so that the second groove structure 4123c can be formed in the annular core substrate 412a. Otherwise, it is difficult to adjust the angle between the outer arc segments 4123b of the two adjacent iron sheets 4121a, so as to make the multiple iron sheets 4121a connected in a straight line into an annular connection. The purpose of making the two ends of the core substrate 412a in a detachable connection state is to restore the multiple iron sheets 4121a connected in an annular state to a linear connection state.

[0044] In this embodiment, the connecting portion 4122b can be a straight line segment. Two ends of the connecting portion 4122b are respectively connected to the middle of the inner arc segment 4121b and the middle of the outer arc segment 4123b.

[0045] In a preferred embodiment, the outer diameter of the tubular structure is 33.80 mm (R is 16.90 mm), the inner diameter of the tubular structure is 20.80 mm (R is 10.40 mm), and the thickness of the stator 412 formed by overlapping multiple core substrates 412a is 13 to 50 mm, preferably 20 mm in this embodiment. The outer diameter of the stator 412 is the outer diameter of the circle formed by connecting multiple outer arc segments 4123b, and the inner diameter of the stator 412 is the maximum distance between the tops of two inner arc segments 4121b.

[0046] The included angle between the two ends of the inner arc segment 4121b is 40°, the end width of the inner arc segment 4121b is 0.80mm, and the straight length of the inner arc segment 4121b is 6-7mm, preferably 6.20mm in this embodiment; the included angle between the two ends of the outer arc segment 4123b is 40°, the width of the outer arc segment 4123b is 1-2mm, preferably 1.40mm in this embodiment, and the straight length of the outer arc segment 4123b is 11-12mm, preferably 11.56mm in this embodiment. The minimum distance from the top of the inner arc segment 4121b to the bottom of the outer arc segment 4123b is 6.50mm, and the minimum distance from the end of the inner arc segment 4121b to the bottom of the outer arc segment 4123b is 6.19mm; the distance from the top of the connecting portion 4122b to the bottom of the outer arc segment 4123b is 5.33mm, and the width of the connecting portion 4122b is 2-3mm, preferably 2.80mm in this embodiment. The minimum opening width of the second groove structure 4123c is 0.1-0.2mm, preferably 0.10mm in this embodiment.

[0047] A chamfer (not shown) is formed at a connection point between the end of the connecting portion 4122b and the outer arc segment 4123b. The radius R of the chamfer is 0.06-0.30 mm, and is preferably 0.30 mm in this embodiment.

[0048] The present application provides a new stator structure and its size specifications, which can be applied to the fields of brushless motor technology and motor technology for water pumps. The stator can improve the structural diversity of brushless motors, make the brushless motors simple in structure, enhance working efficiency, and increase service life. The stator structure of the above structure and specifications is not disclosed in the prior art, thus limiting the overall structural parameters of the water pump and failing to fully meet the needs of production and life. Using the motor with the stator in the present application, the water pump manufactured according to its motor specifications has stronger performance, simpler structure, higher efficiency, and longer service life.

[0049] In this embodiment, the surface of the inner liner 411 is uniformly distributed with a plurality of second connection protrusions 4111 along the radial direction, and the second connection protrusions 4111 extend along the axial direction of the inner liner 411. The second connection protrusions 4111 are limitedly connected to the third gap 4121c. In this structure, since the inner liner 411 is already fixed, a plurality of protrusions are provided on the surface of the inner liner 411 to be limitedly connected to the third gap 4121c, which can enhance the connection stability between the second outer shell 2 and the stator 412, and prevent the stator 412 from being affected when the water pump vibrates or trembles violently during operation, which may cause the stator 412 to become loose or even fall off inside the second outer shell 2 over time.

[0050] See also Fig.10 In this embodiment, the impeller 3 includes a first disk 31 and a plurality of blades 32 surrounding the center of the disk and uniformly distributed on the front of the first disk 31. The blades 32 include a first arc segment 321, a second arc segment 322 and a third arc segment 323. The first arc segment 321 is close to the center of the circle. The two ends of the second arc segment 322 are respectively connected to the first arc segment 321 and the third arc segment 323. The top height of the first arc segment 321 and the top height of the third arc segment 323 are both higher than the top height of the second arc segment 322. The lengths of the second arc segment 322 and the third arc segment 323 are both greater than the length of the first arc segment 321, and the length of the second arc segment 322 is not less than the length of the third arc segment 323. Therefore, based on the above-mentioned height difference setting, a side surface of the first arc segment 321, a side surface of the third arc segment 323 and the top of the second arc segment 322 form a third groove structure together. The first arc segment 321 includes a top surface 3211 , two vertical end surfaces 3212 , a first arc-shaped side surface 3213 and a second arc-shaped side surface 3214 . The side length of the first arc-shaped side surface 3213 is greater than the side length of the second arc-shaped side surface 3214 .

[0051] In this structure, a special height difference is set on each arc segment, the purpose of which is to set a groove structure on the top of each blade 32. When the impeller 3 rotates, the water flow rate at this location is large and the flow rate is fast. It can also reduce the contact area between the blade 32 and the water, and reduce the pressure of water on the blade 32, thereby increasing the rotation speed of the impeller 3 and efficiently draining and delivering water.

[0052] In this embodiment, a filter cover 5 is provided at the first shell 1, and the filter cover 5 is used to cover the water inlet hole 13 to prevent excessive or large impurities and garbage from flowing out with the water flow and blocking the water inlet hole 13, so as to make the water in the water pump clean, reduce the possibility of damage to the impeller 3, and improve the service life of the machine.

[0053] In a further embodiment, a base (not shown) is further included, on which the first housing 1 and the second housing 2 are both arranged, so as to move or install the two housings to the desired positions at one time, saving working time and making the whole machine more practical.

[0054] In the description of this specification, the description with reference to the terms "in the present embodiment", "in a further embodiment", "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A water pump, characterized in that: The invention comprises a first housing, a second housing, an impeller and a power mechanism, wherein the first housing is rotatably connected to the second housing, a first opening is provided at one end of the first housing, a second opening is provided at one end of the second housing, the impeller is provided in the first opening, the power mechanism is provided in the second opening, a first step position is provided on the inner wall of the first opening, one end of the power mechanism is limitedly connected to the first step position and the power mechanism can rotate relative to the surface of the first step position; the power mechanism is used to drive the impeller to rotate, and after the power mechanism is limitedly connected to the first step position, the first opening is closed and connected with the second opening; The first shell is provided with a water outlet and a water inlet, the water outlet, the water inlet and the first opening are connected, the water inlet is protrudingly arranged at the other end of the first shell, and is used to draw water into the first shell on one side of the first shell, and the water outlet is protrudingly arranged at the top of the first shell, and is used to drain water on the top of the first shell; A water diversion groove is provided inside the first housing, and the water diversion groove is extended along the circumferential direction of the water inlet hole so that two ends of the water diversion groove are connected, and the groove bottom depth of one end of the water diversion groove is less than the groove bottom depth of the other end of the water diversion groove, and the other end of the water diversion groove is directly connected to the water outlet hole; The power mechanism comprises a pump shaft, an electric motor and a first mounting seat, wherein the pump shaft is in driving connection with the electric motor, the electric motor is mounted on the upper surface of the first mounting seat, a first shaft hole is provided on the first mounting seat, one end of the pump shaft passes through the first shaft hole and is connected to the impeller; the lower surface of the first mounting seat is limit-connected to the first step position and can rotate relative to the first step position; The motor comprises an inner liner, a stator and a rotor. The stator is mounted on the inner wall of the second housing. The stator is a tubular structure. The inner liner is sleeved inside the stator. The rotor is mounted inside the inner liner. One end of the inner liner is connected to the upper surface of the first mounting seat. The pump shaft is tightly connected to the rotor. The stator comprises a plurality of annular core substrates with overlapping surfaces, the core substrate comprises a plurality of iron sheets connected at their ends, a first end and a second end are arranged on the core substrate; the iron sheet comprises an inner arc segment, a connecting portion and an outer arc segment, the inner arc segment and the outer arc segment share a center of a circle, a plurality of the outer arc segments are connected to form an outer ring of the core substrate, a plurality of the inner arc segments surround an inner ring of the core substrate, two ends of the connecting portion are respectively connected to the outer arc segment and the inner arc segment, the ends of two adjacent outer arc segments are connected to form a second groove structure, and a third gap is arranged between the ends of two adjacent inner arc segments; the outer arc segment of the iron sheet located at the first end is detachably connected to the outer arc segment of the iron sheet located at the second end; A plurality of second connecting protrusions are evenly distributed radially on the surface of the inner container, and the second connecting protrusions extend along the axial direction of the inner container; The second connecting protrusion is position-limitingly connected to the third gap.

2. The water pump according to claim 1, characterized in that: The first opening and the second opening are both circular holes, and the first step position is arranged in a ring shape extending in the circumferential direction of the first opening within the first opening; a second step position is arranged on the inner wall of the first opening, and the second step position is arranged in a ring shape after extending in the circumferential direction of the first opening within the first opening, and the inner diameter of the second step position is the same as the outer diameter of the first step position; at least one baffle is also arranged on the inner wall of the first opening, and the baffle plate is extended along the radial direction of the first opening, and a first gap is arranged between the bottom surface of the baffle plate and the surface of the second step position.

3. The water pump according to claim 2, characterized in that: A first connecting protrusion is protruding from the outside of the second opening of the second shell. The first connecting protrusion is annular and connected to the first shell. The inner diameter of the first connecting protrusion is larger than the inner diameter of the first opening. At least one matching protrusion is provided on the outer wall of the first connecting protrusion, and a second gap is provided between the matching protrusion and the surface of the second shell.

4. The water pump according to claim 3, characterized in that: The width of the second gap is not less than the thickness of the baffle; the thickness of the matching protrusion is not greater than the width of the first gap.

5. The water pump according to claim 4, characterized in that: The other end of the second shell is provided with a third opening, the third opening is in the shape of a circular hole, and after the third opening is connected with the second opening, the second shell is in a tubular structure.

6. The water pump according to claim 5, characterized in that: An end cover and a locking piece are connected to the third opening, and the locking piece is detachably connected to the outer wall of the third opening, and a first groove is arranged on the edge of the end cover, and the first groove runs through the end cover, and buckles are symmetrically arranged on both sides of the first groove, and the buckles extend toward the second opening direction, and the buckles are clamped on the locking piece, and the first groove is adapted to the locking piece; the locking piece includes a clamping portion and a through hole portion, and the through hole portion is connected below the clamping portion, and the clamping portion includes an upper clamping plate and a lower clamping plate, and the outer wall of the third opening is clamped between the upper clamping plate and the lower clamping plate so that the locking piece is connected to the second shell, and the buckle is clamped on the end face of the through hole portion facing the second opening; when the end cover is connected to the third opening, the edge of the through hole portion is covered in the first groove.

7. The water pump according to claim 1, characterized in that: The impeller includes a first circular disk and a plurality of blades surrounding the center of the circular disk and evenly distributed on the front side of the circular disk, the blades include a first circular arc segment, a second circular arc segment and a third circular arc segment, the first circular arc segment is close to the center of the circle, the two ends of the second circular arc segment are respectively connected to the first circular arc segment and the third circular arc segment, the top height of the first circular arc segment and the top height of the third circular arc segment are both higher than the top height of the second circular arc segment, the lengths of the second circular arc segment and the third circular arc segment are both greater than the length of the first circular arc segment, and the length of the second circular arc segment is not less than the length of the third circular arc segment.

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