Motor, booster pump and water purification equipment
By injection molding the plastic sealed shell, stator assembly and bearing cover of the booster pump motor, the problem of low assembly efficiency in the prior art is solved, and a more efficient assembly process is achieved.
Patent Information
- Application Number
- CN202421632966.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The bearing covers of existing booster pumps are less efficient and usually require a fixed connection to the motor housing through locking screws, clamping or welding.
By injection molding the motor's plastic-sealed housing, stator assembly and bearing cover into one, the later step of secondary assembly of the bearing cover is avoided, and it is directly embedded in the plastic-sealed housing.
Save a process, improve the assembly efficiency of the bearing cover, and thus improve the assembly efficiency of the entire booster pump.
Smart Images
Figure CN223039751U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water purification, and particularly relates to a motor, a booster pump and a water purification device. Background Art
[0002] The bearing cover of the motor is mainly used to protect the motor bearing. The existing bearing covers of booster pumps are usually fixedly connected to the motor housing by means of locking screws, snap connection or welding, and the assembly efficiency of the bearing cover is relatively low. Summary of the Utility Model
[0003] The main object of the utility model is to provide a motor, a booster pump and a water purification device, aiming at solving the technical problem of low assembly efficiency of the bearing cover.
[0004] To achieve the above object, the motor proposed by the utility model comprises a plastic-sealed housing, a stator assembly, a rotor assembly and a bearing cover; the rotor assembly is arranged inside the stator assembly, the rotor assembly comprises a rotor body, a rotor shaft and a bearing, the rotor shaft penetrates through the rotor body, and the bearing sleeves the end of the rotor shaft; the bearing cover covers the bearing; wherein, the plastic-sealed housing, the stator assembly and the bearing cover are injection-molded into one body.
[0005] In an embodiment, the plastic-sealed housing comprises a stator embedding part and a bottom plate part which are connected, the stator assembly is embedded in the stator embedding part, and at least part of the bearing cover is embedded in the bottom plate part.
[0006] In an embodiment, the bearing cover comprises a support part and a skirt, the bearing is adaptively installed on the support part, and the skirt is embedded in the bottom plate part.
[0007] In an embodiment, a plurality of limiting notches are arranged on the outer peripheral edge of the skirt, and the plurality of limiting notches are arranged at intervals along the circumferential direction of the skirt; and / or, a plurality of limiting holes are arranged on the skirt, and the plurality of limiting holes are arranged at intervals along the circumferential direction of the skirt.
[0008] In an embodiment, the number of the limiting notches and / or the limiting holes is 5-10.
[0009] In an embodiment, the limiting holes are located between two adjacent limiting notches.
[0010] In an embodiment, the support part comprises an annular surrounding wall and a bottom wall which are connected, a central hole is formed in the bottom wall, and the central hole corresponds to the rotor shaft.
[0011] In an embodiment, the diameter of the central hole is larger than the diameter of the rotor shaft.
[0012] In one embodiment, an annular boss is provided on the outer periphery of the central hole.
[0013] In one embodiment, the height of the annular enclosure is greater than the thickness of the bearing.
[0014] In one embodiment, the geometric centers of the bearing cover and the bottom plate portion coincide.
[0015] In one embodiment, an installation cavity is formed in the plastic-sealed housing, the rotor assembly is installed in the installation cavity, and at least a part of the rotor shaft penetrates through the outer wall surface of the plastic-sealed housing.
[0016] The present utility model further provides a booster pump, which includes a pump head and the motor, and the motor is connected to the pump head. The motor includes a plastic-sealed housing, a stator assembly, a rotor assembly, and a bearing cover; the rotor assembly is arranged inside the stator assembly, the rotor assembly includes a rotor body, a rotor shaft, and a bearing, the rotor shaft penetrates through the rotor body, and the bearing sleeves the end of the rotor shaft; the bearing cover covers the bearing; wherein, the plastic-sealed housing, the stator assembly, and the bearing cover are injection-molded into one body.
[0017] The present utility model further provides a water purification device, which includes a booster pump, the booster pump includes a pump head and the motor, and the motor is connected to the pump head. The motor includes a plastic-sealed housing, a stator assembly, a rotor assembly, and a bearing cover; the rotor assembly is arranged inside the stator assembly, the rotor assembly includes a rotor body, a rotor shaft, and a bearing, the rotor shaft penetrates through the rotor body, and the bearing sleeves the end of the rotor shaft; the bearing cover covers the bearing; wherein, the plastic-sealed housing, the stator assembly, and the bearing cover are injection-molded into one body.
[0018] The technical solution of the present utility model, by integrally injection-molding the plastic-sealed housing, the stator assembly, and the bearing cover of the motor, eliminates the need for secondary assembly of the bearing cover to the plastic-sealed housing by means of locking screws, clamping, or welding in the later stage, saves one process, and improves the assembly efficiency of the bearing cover. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0020] Figure 1 FIG. is a schematic structural diagram of an embodiment of a booster pump with a motor provided by the present utility model;
[0021] Figure 2 is Figure 1 a sectional view of the structure in
[0022] Figure 3 is Figure 2 an enlarged partial view at A in
[0023] Figure 4 is Figure 1 an exploded view of a partial structure of the structure in
[0024] Figure 5 is Figure 4 a schematic structural view of the bearing cover in
[0025] Explanation of the reference numerals in the drawings:
[0026] 1. Booster pump; 10. Motor; 20. Pump head;
[0027] 100. Plastic-sealed housing; 110. Stator embedding part; 120. Bottom plate part; 130. Installation cavity;
[0028] 200. Stator assembly;
[0029] 300. Rotor assembly; 310. Rotor body; 320. Rotor shaft; 330. Bearing;
[0030] 400. Bearing cover; 410. Support part; 411. Annular surrounding wall; 412. Bottom wall; 412a. Central hole; 412b. Annular boss; 420. Skirt; 421. Limiting notch; 422. Limiting hole;
[0031] 500. Protective sleeve;
[0032] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments
[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0036] The bearing cover of the motor is mainly used to protect the motor bearing. The existing bearing covers of booster pumps are usually fixedly connected to the motor housing by locking screws, clamping or welding, resulting in low assembly efficiency of the bearing cover. The present utility model proposes a motor mainly used for a booster pump, which can improve the assembly efficiency of the bearing cover and thus improve the assembly efficiency of the booster pump.
[0037] Please refer to Figure 1 and Figure 2 , in an embodiment of the present utility model, the motor 10 includes a plastic encapsulated housing 100, a stator assembly 200, a rotor assembly 300, and a bearing cover 400; the rotor assembly 300 is disposed inside the stator assembly 200, the rotor assembly 300 includes a rotor body 310, a rotor shaft 320, and a bearing 330, the rotor shaft 320 passes through the rotor body 310, and the bearing 330 is sleeved on the end of the rotor shaft 320; the bearing cover 400 covers the bearing 330; wherein, the plastic encapsulated housing 100, the stator assembly 200, and the bearing cover 400 are injection molded as a whole.
[0038] Specifically, the plastic-encapsulated housing 100 is the housing of the motor 10, and the plastic-encapsulated housing 100, the stator assembly 200 and the bearing cover 400 are injection molded as one, that is, the stator assembly 200 and the bearing cover 400 are embedded in the plastic-encapsulated housing 100. The motor 10 of this embodiment, whose rotor assembly 300 is arranged on the inner side of the stator assembly 200, is an inner rotor motor 10. In other embodiments, the motor 10 can also be set as an outer rotor motor 10, and the relevant structures can be adjusted accordingly. The electronic stator assembly 200 and the rotor assembly 300 are matched, and the stator assembly 200, the bearing cover 400 and the plastic-encapsulated housing 100 are injection molded as one, so that the live parts of the motor 10 can be plastic-encapsulated to form a closed whole, avoiding the occurrence of occasional faults. When the motor 10 of the utility model is applied to the booster pump 1 product, it can also avoid the situation where the pump head 20 of the booster pump 1 leaks and flows into the motor 10 to cause safety hazards. At the same time, the bearing cover 400 is injection molded together with the plastic housing 100 and the stator assembly 200, and the bearing cover 400 does not need to be reassembled with the plastic housing 100 by screwing, clamping or welding in the later stage, which saves a process and improves the assembly efficiency of the bearing cover 400. Furthermore, a protective cover 500 can be provided on the outer side of the bearing cover 400 to protect the bearing cover 400.
[0039] The material of the plastic-encapsulated shell 100 is non-metallic material. Furthermore, the material of the plastic-encapsulated shell 100 is BMC material. Specifically, the BMC material is the abbreviation of Bulk (Dough) molding compounds, that is, bulk molding compound, also known as unsaturated polyester bulk molding compound. Its main raw materials are GF (chopped glass fiber), UP (unsaturated resin), MD (filler calcium carbonate) and various additives that are fully mixed to form a bulk prepreg.
[0040] BMC materials have the following properties:
[0041] ① Excellent mechanical properties: BMC products have excellent mechanical strength and stiffness, and their tensile strength and modulus are higher than those of general plastic materials. BMC products also have good wear resistance and impact resistance, and can replace traditional metal materials in mechanical design and manufacturing, achieving the effects of material saving and cost reduction. ② Excellent heat resistance and adhesiveness: BMC products still have good mechanical properties and stability at high temperatures and can be used within the range of -20°C to 180°C. In addition, since BMC is a material that undergoes thermosetting curing in a mold, its surface adhesion is also very good, and it can be used to manufacture some parts with complex shapes and high precision requirements. ③ Excellent corrosion resistance and barrier properties: BMC products have good chemical corrosion resistance and can be used to manufacture some parts that need to contact corrosive substances such as acids and alkalis. In addition, BMC also has good density and barrier properties and can be used to manufacture liquid storage containers such as fuel tanks and water tanks, achieving the effects of water impermeability, no leakage, and anti-pollution. ④ Excellent electrical insulation and anti-electro-erosion properties: BMC products have excellent electrical insulation and anti-electro-erosion properties and can be widely used in the fields of electrical appliances, electronics, and communications. BMC's anti-electro-erosion property also makes it an excellent coating material, which can replace traditional organic coatings, achieving the goals of material saving and improved coating effect. ⑤ Simple manufacturing process and low cost: The manufacturing process of BMC products is simple, with a high degree of automation, high production efficiency and one-time forming rate, which can reduce the manufacturing cost. BMC products can also be applied in various manufacturing processes such as mold injection and composite material forming, and can be used for various complex parts and molds.
[0042] Overall, BMC products have the advantages of excellent mechanical properties, heat resistance, corrosion resistance, and outstanding electrical insulation, and can achieve the goals of energy conservation, emission reduction, cost reduction, and quality improvement.
[0043] Please refer to Figure 2, the rotor assembly 300 includes a rotor body 310, a rotor shaft 320, and bearings 330. The rotor shaft 320 passes through the rotor body 310, and the bearings 330 are sleeved on the ends of the rotor shaft 320; the bearing cover 400 covers the bearings 330. The rotor body 310 includes a rotor core formed by stacking a plurality of silicon steel sheets together and permanent magnets installed on the rotor core. The rotor shaft 320 passes through the rotor core, the bearings 330 are sleeved on one end of the rotor shaft 320, and the bearing cover 400 is arranged to cover the bearings 330. The size of the bearing cover 400 is adapted to the size of the bearings 330. The bearing cover 400 of the motor 10 can effectively protect the bearings 330 from interference by external factors such as dust, impurities, and moisture, prevent these factors from damaging the bearings 330, and thus extend the service life of the bearings 330 and the motor 10; by isolating the external environment, the bearing cover 400 can also reduce the friction and wear between the bearings 330 and the outside world, and keep the bearings 330 in good operating condition. Moreover, when the motor 10 is working, friction and wear will occur inside, and the bearing cover 400 can reduce these energy losses to a certain extent, thereby improving the efficiency of the motor 10; at the same time, the bearing cover 400 can support the shaft end of the motor 10, control the axial movement, ensure that the motor 10 maintains a stable axial position during operation, and they can tightly seal the gap between the rotor and the stator of the motor 10 and maintain a constant volume, preventing the internal air pressure of the motor 10 from changing due to the inflow of dense gas and affecting the operation of the motor 10, thereby ensuring the stability and accuracy of the rotation speed of the motor 10.
[0044] In this embodiment, the type of the motor 10 is a brushless motor 10. The brushless motor 10 consists of a motor 10 body and a driver, and is a typical mechatronic product. Since the brushless motor 10 operates in a self-controlled manner, it does not require an additional starting winding on the rotor like a synchronous motor 10 with heavy-load starting under variable-frequency speed regulation, nor does it generate oscillations and loss of synchronization when the load changes suddenly. For the permanent magnets of medium and small-capacity brushless motors 10, rare-earth neodymium iron boron (Nd-Fe-B) materials with high magnetic energy levels are now mostly used. Therefore, the volume of the rare-earth permanent magnet brushless motor 10 is reduced by one frame size compared with a three-phase asynchronous motor 10 of the same capacity, and the volume of the booster pump 1 using this motor 10 can be further reduced.
[0045] Compared with the brushed motor 10, the brushless motor 10 removes the carbon brush. The most direct change is that there is no electric spark generated during the operation of the brushed motor 10, which greatly reduces the interference of the electric spark on the remote control radio equipment. At the same time, since the brushless motor 10 has no carbon brush, the friction during operation is greatly reduced, the operation is smooth, and the noise is much lower. Further, since the brushless motor 10 has no carbon brush, the wear of the brushless motor 10 is mainly concentrated on the bearing 330. From a mechanical perspective, the brushless motor 10 is almost a maintenance-free motor 10. When necessary, only some dust removal maintenance is required, which is convenient for maintenance and has a long service life.
[0046] In the technical solution of the present utility model, by integrally injection molding the plastic-sealed housing 100, the stator assembly 200 and the bearing cover 400 of the motor 10, it is no longer necessary to secondarily assemble the bearing cover 400 with the plastic-sealed housing 100 by means of locking screws, snap connection or welding in the later stage, saving one process and improving the assembly efficiency of the bearing cover 400.
[0047] Please refer to Figure 2 and Figure 3 , in an embodiment, the plastic-sealed housing 100 includes a stator embedding portion 110 and a bottom plate portion 120 connected to each other. The stator assembly 200 is embedded in the stator embedding portion 110, and the bearing cover 400 is at least partially embedded in the bottom plate portion 120.
[0048] Specifically, the plastic-sealed housing 100 is generally arranged in a barrel shape. The plastic-sealed housing 100 includes a stator embedding portion 110 and a bottom plate portion 120 connected to each other. The stator embedding portion 110 is arranged in a hollow barrel shape. The stator assembly 200 is embedded in the stator embedding portion 110, and the rotor assembly 300 is installed inside the stator embedding portion 110. The bottom plate portion 120 is connected to one end of the stator embedding portion 110, and the bottom plate portion 120 and the stator embedding portion 110 enclose an installation cavity 130 for installing the rotor assembly 300. The bearing cover 400 is at least partially embedded in the bottom plate portion 120 and is arranged corresponding to the bearing 330 of the rotor assembly 300 to protect it.
[0049] Please refer to Figures 3 to 5 , further, the bearing cover 400 includes a support portion 410 and a skirt 420. The bearing 330 is adaptively installed on the support portion 410, and the skirt 420 is embedded in the bottom plate portion 120. Specifically, the bearing cover 400 mainly includes two parts, a support portion 410 and a skirt 420. The support portion 410 is mainly used to accommodate and install the bearing 330 and plays a role in protecting and supporting the bearing 330. The skirt 420 is a skirt extending outward from the outer periphery of the support portion 410. The bearing cover 400 is connected to the plastic-sealed housing 100 through the skirt 420, and the skirt 420 is embedded in the bottom plate portion 120.
[0050] Please refer to Figure 4And Figure 5 It should be noted that a plurality of limiting notches 421 are provided on the outer peripheral edge of the skirt 420, and the plurality of limiting notches 421 are arranged at intervals in the circumferential direction of the skirt 420; and / or, the skirt 420 is provided with a plurality of limiting holes 422, and the plurality of limiting holes 422 are arranged at intervals in the circumferential direction of the skirt 420. Specifically, in order to further improve the connection stability between the bearing cover 400 and the plastic-sealed housing 100 and prevent the bearing cover 400 from rotating relative to the plastic-sealed housing 100, which may affect the use of the motor 10, limiting notches 421 and / or limiting holes 422 can be selectively provided on the skirt 420 to improve the bonding force between the bearing cover 400 and the plastic-sealed housing 100 and prevent the bearing cover 400 from rotating relative to the plastic-sealed housing 100.
[0051] There can be various design methods for the limiting notches 421 and / or the limiting holes 422. One design method can be that a plurality of limiting notches 421 are provided on the outer peripheral edge of the skirt 420, and the plurality of limiting notches 421 are arranged at intervals in the circumferential direction of the skirt 420. In this way, the bonding force between the bearing cover 400 and the plastic-sealed housing 100 is improved through the plurality of limiting notches 421; the second design method can be that the skirt 420 is provided with a plurality of limiting holes 422, and the plurality of limiting holes 422 are arranged at intervals in the circumferential direction of the skirt 420. When the plastic-sealed housing 100 and the bearing cover 400 are injection-molded, the injection material can flow through the limiting holes 422 to improve the bonding force between the bearing cover 400 and the plastic-sealed housing 100 through the plurality of limiting holes 422; the third design method can be to alternately arrange a plurality of limiting notches 421 and a plurality of limiting holes 422 along the circumferential direction of the skirt 420. The number of the limiting notches 421 and / or the limiting holes 422 is 5-10. The number of the limiting notches 421 can exemplarily be 5, 6, 7, 8, 9, 10. Similarly, the number of the limiting holes 422 can exemplarily be 5, 6, 7, 8, 9, 10. The number of the limiting notches 421 and the limiting holes 422 can be the same, or the number of one of them can be more or less than that of the other, and no specific limitation is made thereto.
[0052] Please refer to Figure 5 , in an embodiment, the limiting hole 422 is located between two adjacent limiting notches 421. Preferably, the number of the limiting holes 422 and the limiting notches 421 is set to be the same, and the limiting hole 422 is located between two adjacent limiting notches 421. Through the joint engagement of the limiting hole 422 and the limiting notches 421 with the plastic-sealed housing 100, the bonding force between the bearing cover 400 and the plastic-sealed housing 100 is further improved, thereby preventing the bearing cover 400 from rotating relative to the plastic-sealed housing 100.
[0053] Please continue to refer to Figure 5, in one embodiment, the support portion 410 includes a connected annular wall 411 and a bottom wall 412. The bottom wall 412 is provided with a central hole 412a, and the central hole 412a is arranged corresponding to the rotor shaft 320. Specifically, the annular wall 411 is used to support and protect the bearing 330, and the bottom wall 412 is used to limit the bearing 330 in the axial direction of the rotor shaft 320. A central hole 412a is also provided on the bottom wall 412 corresponding to the rotor shaft 320, and the central hole 412a and the rotor shaft 320 are coaxially arranged. The setting of the central hole 412a facilitates the installation of the rotor assembly 300 and facilitates observing whether the rotor assembly 300 is installed in place. Further, the diameter of the central hole 412a is larger than the diameter of the rotor shaft 320, so as to facilitate adjusting the position of the rotor shaft 320 or the bearing 330 through the central hole 412a. Furthermore, an annular boss 412b is provided on the outer periphery of the central hole 412a to improve the structural strength of the bottom wall 412.
[0054] Please refer to Figure 3 , in one embodiment, the height of the annular wall 411 is greater than the thickness of the bearing 330. That is to say, the annular wall 411 can completely wrap and cover the bearing 330 to better protect the bearing 330.
[0055] Please refer to Figure 2 and Figure 4 , in one embodiment, the geometric centers of the bearing cover 400 and the bottom plate portion 120 coincide. That is to say, the bearing cover 400 is located at the center position of the bottom plate portion 120. Corresponding to the position of the rotor assembly 300, the coincidence of the geometric centers of the bearing cover 400 and the bottom plate portion 120 can position the installation of the rotor assembly 300 and detect whether the rotor assembly 300 is installed in place.
[0056] Please refer to Figure 2 and Figure 3 , in one embodiment, an installation cavity 130 is formed in the plastic-sealed housing 100. The rotor assembly 300 is installed in the installation cavity 130, and at least part of the rotor shaft 320 penetrates through the outer wall surface of the plastic-sealed housing 100. The bearing 330 is installed at the end of the rotor shaft 320, and the bearing 330 is also located outside the outer wall surface of the plastic-sealed housing 100 to better fit and install with the bearing cover 400.
[0057] Please refer to Figure 1, the present utility model also provides a booster pump 1, which includes a pump head 20 and a motor 10. The specific structure of the motor 10 refers to the above-mentioned embodiments. Since this booster pump 1 adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one. Among them, the motor 10 includes a plastic-sealed housing 100, a stator assembly 200, a rotor assembly 300, and a bearing cover 400; the rotor assembly 300 is arranged inside the stator assembly 200. The rotor assembly 300 includes a rotor body 310, a rotor shaft 320, and a bearing 330. The rotor shaft 320 passes through the rotor body 310, and the bearing 330 is sleeved on the end of the rotor shaft 320; the bearing cover 400 covers the bearing 330; among them, the plastic-sealed housing 100, the stator assembly 200, and the bearing cover 400 are injection-molded into one body.
[0058] The present utility model also provides a water purification device, which includes a booster pump 1, and the booster pump 1 includes a motor 10. The specific structure of the motor 10 refers to the above-mentioned embodiments. Since this water purification device adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one. Among them, the motor 10 includes a plastic-sealed housing 100, a stator assembly 200, a rotor assembly 300, and a bearing cover 400; the rotor assembly 300 is arranged inside the stator assembly 200. The rotor assembly 300 includes a rotor body 310, a rotor shaft 320, and a bearing 330. The rotor shaft 320 passes through the rotor body 310, and the bearing 330 is sleeved on the end of the rotor shaft 320; the bearing cover 400 covers the bearing 330; among them, the plastic-sealed housing 100, the stator assembly 200, and the bearing cover 400 are injection-molded into one body.
[0059] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A motor, characterized in that: include: A plastic-sealed housing, a stator assembly, a rotor assembly and a bearing cover; the rotor assembly is arranged inside the stator assembly, the rotor assembly comprises a rotor body, a rotor shaft and a bearing, the rotor shaft passes through the rotor body, the bearing is sleeved on the end of the rotor shaft; the bearing cover covers the bearing; Wherein, the plastic-encapsulated housing, the stator assembly and the bearing cover are injection-molded as one body.
2. The motor according to claim 1, characterized in that The plastic-sealed housing comprises a stator embedding portion and a bottom plate portion connected to each other, the stator assembly is embedded in the stator embedding portion, and the bearing cover is at least partially embedded in the bottom plate portion.
3. The motor according to claim 2, characterized in that The bearing cover comprises a supporting portion and a skirt, the bearing is adapted to be installed on the supporting portion, and the skirt is embedded in the bottom plate portion.
4. The motor according to claim 3, characterized in that The outer periphery of the skirt is provided with a plurality of limiting notches, and the plurality of limiting notches are arranged at intervals along the circumference of the skirt; and / or the skirt is provided with a plurality of limiting holes, and the plurality of limiting holes are arranged at intervals along the circumference of the skirt.
5. The motor according to claim 4, characterized in that The number of the limiting notches and / or the limiting holes is 5-10.
6. The motor according to claim 4, characterized in that The limiting hole is located between two adjacent limiting notches.
7. The motor according to claim 3, characterized in that The support portion includes an annular surrounding wall and a bottom wall connected to each other. The bottom wall is provided with a center hole, and the center hole is arranged corresponding to the rotor shaft.
8. The motor according to claim 7, characterized in that The diameter of the central hole is greater than the diameter of the rotor shaft.
9. The motor according to claim 7, characterized in that An annular boss is arranged on the outer periphery of the central hole.
10. The motor according to claim 7, characterized in that The height of the annular surrounding wall is greater than the thickness of the bearing.
11. The electric machine according to any one of claims 2 to 10, characterized in that The geometric centers of the bearing cover and the bottom plate coincide with each other.
12. The electric machine according to any one of claims 1 to 10, characterized in that An installation cavity is formed in the plastic-sealed shell, the rotor assembly is installed in the installation cavity, and the rotor shaft at least partially passes through the outer wall surface of the plastic-sealed shell.
13. A booster pump, characterized in that: include: A pump head, and a motor as claimed in any one of claims 1 to 12, wherein the motor is connected to the pump head.
14. A water purification device, characterized in that: Comprising the booster pump as claimed in claim 13.