Anti-corrosion assembly and plastic-sealed motor

Abstract

The application provides an anti-electric corrosion assembly and a plastic-sealed motor. The anti-electric corrosion assembly comprises a front end cover, a stator assembly, a plastic sealing part and a rear end cover, the front end cover and the stator assembly are arranged in the plastic sealing part; the stator assembly is provided with a connecting area exposed to the plastic sealing part, and the rear end cover is connected to the stator assembly through the connecting area; and a conductive part is embedded in the plastic sealing part, one end of the conductive part is connected to the front end cover, and the other end of the conductive part is connected to the rear end cover. The conductive part is embedded in the plastic sealing part to realize direct electric conduction of the front end cover and the rear end cover, effectively prevent electric corrosion caused by shaft voltage, the whole conductive part is arranged in plastic sealing, and there is no danger of falling off, so that the reliability and stability are greatly improved.

Description

Technical Field

[0001] This application belongs to the field of encapsulated motor technology, specifically relating to an anti-electro-erosion component and an encapsulated motor. Background Technology

[0002] In existing encapsulated motors, the stator core is insulated from the front and rear end covers after the stator is encapsulated. Due to high-frequency current and winding imbalance, the shaft voltage is too high, and a pressure difference is formed between the front and rear bearings. This further leads to the breakdown of the oil film on the raceway of the front bearing by the shaft voltage, and electro-corrosion occurs between the inner and outer wheels and the balls, which seriously affects the service life of the motor. Therefore, encapsulated motors must be equipped with an anti-electro-corrosion structure to conduct the front and rear bearings and prevent damage caused by shaft voltage.

[0003] There are many common anti-electrostatic corrosion structures for encapsulated motors, but it is difficult to balance cost and reliability. For example, bearings with insulation structures are very reliable but expensive. Antistatic tape is inexpensive but prone to aging and loosening and cannot meet the needs of high-power motors. External single-core copper wire screws fixed to the front and rear end covers have a simple structure but require long operation time. The simple operation of built-in copper strips cannot ensure effective contact. Although the structure of the split conductive terminal is simpler, the operation process is relatively more complicated. Summary of the Invention

[0004] Therefore, this application provides an anti-electro-erosion component and a plastic-encapsulated motor, which can solve the problem that the anti-electro-erosion structure of the plastic-encapsulated motor in the prior art causes operational troubles during assembly.

[0005] To address the aforementioned problems, this application provides an anti-electro-erosion component, comprising:

[0006] The device includes a front cover, a stator assembly, a molding compound, and a rear cover. The front cover and the stator assembly are disposed within the molding compound. The stator assembly has a connection area exposed outside the molding compound, and the rear cover is connected to the stator assembly via the connection area.

[0007] A conductive component is embedded in the encapsulated component, with one end connected to the front end cap and the other end located in the connection area and connected to the rear end cap.

[0008] In some implementations...

[0009] The stator assembly includes a frame, a portion of which is exposed on the end face of the frame along the axial direction of the stator assembly and forms the connection area; the connection area is provided with a mounting hole, the rear end cover is connected to the mounting hole by screws, and the other end of the conductive element is clamped between the rear end cover and the mounting hole.

[0010] In some implementations...

[0011] The conductive element includes a conductive sheet, which is configured as a U-shaped groove structure, and the stator assembly is partially filled within the conductive sheet.

[0012] In some implementations...

[0013] The bottom surface of the conductive sheet is provided with mounting feet, and the mounting feet are positioned corresponding to the position where the frame and the stator core of the stator assembly abut; the mounting feet are inserted between the frame and the stator core.

[0014] In some implementations...

[0015] The frame has a fixing groove on the end face that abuts against the stator core, and the mounting feet are inserted into the fixing groove.

[0016] In some implementations...

[0017] The stator core has a limiting groove along the axial direction on its side wall, and the bottom of the conductive sheet is matched in the limiting groove.

[0018] In some implementations...

[0019] The bottom of the conductive sheet is stepped at the mounting foot, and the main body of the frame is provided with a mounting groove at the position corresponding to the part between the mounting foot and the side wall of the conductive sheet to accommodate the part between the mounting foot and the side wall of the conductive sheet.

[0020] In some implementations...

[0021] The frame also includes a modular assembly, which fits into the mounting groove to clamp the portion between the mounting foot and the sidewall of the conductive sheet.

[0022] In some implementations...

[0023] The rear end cover is connected to a grounding wire assembly, which includes a grounding wire hole and a grounding wire. The grounding wire hole is located on the end cover, and one end of the grounding wire is connected to the grounding wire hole by a screw.

[0024] According to another aspect of this application, a plastic-encapsulated motor is provided, including the anti-electro-erosion component as described above.

[0025] This application provides an anti-electrostatic corrosion component, comprising: a front end cover, a stator assembly, a plastic sealant, and a rear end cover, wherein the front end cover and the stator assembly are disposed within the plastic sealant; the stator assembly has a connection area exposed outside the plastic sealant, and the rear end cover is connected to the stator assembly via the connection area; a conductive element is embedded within the plastic sealant, one end of which is connected to the front end cover, and the other end of which is disposed in the connection area and connected to the rear end cover.

[0026] This application has the following beneficial effects:

[0027] By embedding conductive components within the plastic encapsulation, direct electrical conduction between the front and rear end caps is achieved, effectively preventing electro-corrosion caused by shaft voltage. The entire conductive component is encapsulated, making operation simple, eliminating the risk of detachment, and greatly improving reliability and stability. Attached Figure Description

[0028] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the encapsulated motor according to an embodiment of this application;

[0030] Figure 2 This is a cross-sectional schematic diagram of the injection-molded stator structure according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of the injection-molded stator according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the injection-molded stator from another perspective, representing an embodiment of this application.

[0033] Figure 5 This is a schematic diagram of the structure of the rear cover according to an embodiment of this application;

[0034] Figure 6 This is a cross-sectional view of the rear cover according to an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the rotor assembly according to an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the stator assembly structure according to an embodiment of this application;

[0037] Figure 9 Examples of this application Figure 8 Enlarged view of a portion of the image;

[0038] Figure 10 This is a schematic diagram of the conductive sheet being assembled on the stator according to an embodiment of this application;

[0039] Figure 11 Examples of this application Figure 10 A schematic diagram of the structure viewed from below in the middle section;

[0040] Figure 12This is a schematic diagram of the structure of the puzzle piece in an embodiment of this application;

[0041] Figure 13 This is a schematic diagram of the front cover structure according to an embodiment of this application;

[0042] Figure 14 This is a schematic diagram of the structure of the wound stator according to an embodiment of this application;

[0043] Figure 15 This is a schematic diagram of the stator core structure according to an embodiment of this application;

[0044] Figure 16 This is a schematic diagram of the lower skeleton structure according to an embodiment of this application;

[0045] Figure 17 Examples of this application Figure 16 A partial upward-view diagram;

[0046] Figure 18 This is a schematic diagram of the upper skeleton structure according to an embodiment of this application;

[0047] Figure 19 Examples of this application Figure 18 A partial upward-view diagram;

[0048] Figure 20 This is a schematic diagram of the structure of the conductive sheet according to an embodiment of this application;

[0049] Figure 21 This is a schematic diagram of the unfolded structure of the conductive sheet according to an embodiment of this application.

[0050] The reference numerals in the attached figures are as follows:

[0051] 1. Stator core; 11. Limiting groove;

[0052] 2. Lower frame; 21. Terminal block; 22. Top mounting platform; 23. Mounting hole; 24. Trapezoidal mounting groove; 25. Side wall mounting post; 26. Bottom fixing groove;

[0053] 3. Upper frame; 31. Top mounting platform; 32. Trapezoidal mounting groove; 33. Side wall mounting column; 34. Bottom fixing groove;

[0054] 4. Windings;

[0055] 5. Winded stator;

[0056] 6. Conductive sheet; 61. First mounting hole; 62. First limiting groove; 63. First mounting foot; 64. Support part; 65. Second mounting foot; 66. Second limiting groove; 67. Second mounting hole; 68. Contact plane;

[0057] 7. Front cover; 71. Front bearing housing; 72. Rivet mounting holes;

[0058] 8. Modular components; 81. Clearance groove; 82. Trapezoidal fixing post;

[0059] 9. Rivets; 10. Stator;

[0060] 11. Plastic-sealed parts; 111. Mounting platform;

[0061] 12. Plastic-sealed stator;

[0062] 13. Rotor assembly; 131. Shaft; 132. Front bearing; 133. Permanent magnet rotor; 134. Rear bearing;

[0063] 14. Rear end cover; 141. End cover mounting foot; 142. Rear bearing housing; 143. Mounting recess; 144. Mounting hole; 145. Rear contact surface; 146. Grounding hole;

[0064] 15. Screw assembly; 16. Screw; 17. Grounding wire assembly. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0066] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0069] See also Figures 1 to 21 As shown, according to an embodiment of this application, an anti-electro-erosion component includes:

[0070] The front cover 7, the stator assembly, the molding compound 11, and the rear cover 14 are provided, wherein the front cover 7 and the stator assembly are disposed within the molding compound 11; the stator assembly has a connection area exposed outside the molding compound 11, and the rear cover 14 is connected to the stator assembly via the connection area;

[0071] A conductive component is embedded in the plastic seal 11, with one end connected to the front cover 7 and the other end located in the connection area and connected to the rear cover 14.

[0072] This application achieves direct electrical conduction between the front and rear end caps 14 by embedding conductive components within the plastic encapsulation 11, effectively preventing electro-corrosion caused by shaft voltage. The entire conductive component is encapsulated, eliminating the risk of detachment and greatly improving reliability and stability.

[0073] The front and rear end covers 14 are directly connected by a conductive component, which is then encapsulated in a plastic seal 11. This provides excellent conductivity, is unaffected by the external environment, and ensures that there is no voltage difference between the front and rear end covers 14. This prevents the oil film in the bearing raceway from being broken down by the shaft voltage, thus preventing electro-corrosion and improving the service life of the motor.

[0074] Because it directly uses conductive components to conduct electricity, it can provide sufficient protection against large shaft voltages, even when applied to high-power motors, thus preventing electrolytic corrosion.

[0075] In some implementations...

[0076] The stator assembly includes a frame, a portion of which is exposed on the end face of the frame along the axial direction of the stator assembly and forms the connection area; the connection area is provided with a mounting hole 23, the rear end cover 14 is connected to the mounting hole 23 by a screw 16, and the other end of the conductive element is clamped between the rear end cover 14 and the mounting hole 23.

[0077] The connection between the conductive component and the rear cover 14 is achieved by setting a connection area on the frame of the stator assembly, with mounting holes 23 at the connection area, and fixing the rear cover 14 and the conductive component together with screws 16. The entire operation is simple and the structure is straightforward.

[0078] In some implementations...

[0079] The conductive component includes a conductive sheet 6, which is configured as a U-shaped groove structure, and the stator assembly is partially filled within the conductive sheet 6.

[0080] The conductive component uses a sheet-like conductive sheet 6, which is U-shaped and clamps the stator assembly along the axial direction of the stator assembly to connect the front and rear end covers 14 at both ends of the stator assembly. The sheet-like conductive sheet 6 is easy to manufacture, simple to install and operate, and has stable and reliable conductive contact.

[0081] In some implementations...

[0082] The bottom surface of the conductive sheet 6 is provided with mounting feet, and the mounting feet are positioned corresponding to the position where the frame of the stator assembly and the stator core 1 abut. The mounting feet are inserted between the frame and the stator core 1.

[0083] The conductive sheet 6 is provided with mounting feet, which are inserted between the frame and the stator core 1. This can improve the axial positioning effect between the conductive sheet 6 and the stator assembly. Since the stator core 1 is usually provided with a frame at both ends, two mounting feet are also provided. The two mounting feet clamp the stator core 1, and the assembly position is limited, which makes the assembly simple and convenient.

[0084] In some implementations...

[0085] The frame has a fixing groove on the end face that abuts against the stator core 1, and the mounting feet are inserted into the fixing groove.

[0086] Based on the fact that the conductive sheet 6 is provided with mounting feet that are inserted between the frame and the stator core 1, this application provides a fixing groove on the end face of the frame near the stator core 1 to facilitate the insertion of the mounting feet; this does not affect the overall structure of the stator core 1.

[0087] In some implementations...

[0088] The stator core 1 has a limiting groove 11 along the axial direction on its side wall, and the bottom of the conductive sheet 6 is matched in the limiting groove 11.

[0089] For the path that the conductive sheet 6 travels along the axial direction of the stator core 1, this application limits it to the side wall of the stator core 1, and provides a limiting groove 11 on the side wall so that the conductive sheet 6 is partially embedded in the limiting groove 11. During installation, the conductive sheet 6 needs to be placed in the limiting groove 11. The limiting groove 11 provides a horizontal limiting function for the conductive sheet 6 perpendicular to the motor shaft. The limiting groove 11 realizes the standardized installation of the conductive sheet 6. At the same time, the conductive sheet 6 being located in the limiting groove 11 avoids excessive molding compound entering between the stator core 1 and the conductive sheet 6 due to excessive injection pressure during the injection molding process, which would cause the conductive sheet 6 to deform and protrude.

[0090] The contact between the conductive sheet 6 and the stator core 1 allows the stator core 1 to play an auxiliary conductive role, but not a primary conductive role. This is because the stator core 1 is made of stacked silicon steel sheets to prevent eddy current losses. When the stator core 1 acts as an anti-electro-erosion structure, the stacking coefficient of the silicon steel sheets varies due to limitations in process precision. This can lead to differences in resistance when stator cores 1 of the same stack thickness participate in conduction, affecting the shaft voltage data of the finished motor and impacting the motor's qualification. Using the conductive sheet 6 structure, regardless of whether it contacts the stator core 1, ensures that the shaft voltage will not cause harmful damage.

[0091] In some implementations...

[0092] The bottom of the groove of the conductive sheet 6 is stepped at the mounting foot, and the main body of the skeleton is provided with a mounting groove at the position corresponding to the part between the mounting foot and the side wall of the conductive sheet 6, so as to accommodate the part between the mounting foot and the side wall of the conductive sheet 6.

[0093] The conductive sheet 6 is arranged in a stepped manner on the outer wall of the skeleton. Some of the conductive sheets 6 are located in the mounting groove on the skeleton. The conductive sheets 6 are positioned by the mounting groove on the skeleton to prevent deformation during the injection molding process.

[0094] In some implementations...

[0095] The frame also includes a modular block 8, which is shaped to fit into the mounting groove and clamps the portion between the mounting foot and the side wall of the conductive sheet 6.

[0096] The skeleton positions the conductive sheet 6 using a block 8 that matches the mounting groove to clamp the conductive sheet 6, making it less likely to fall off and facilitating injection molding.

[0097] In some implementations...

[0098] The rear end cover 14 is connected to a grounding wire assembly 17. The grounding wire assembly 17 includes a grounding wire hole 146 and a grounding wire. The grounding wire hole 146 is located on the end cover, and one end of the grounding wire is connected to the grounding wire hole 146 by a screw 16.

[0099] Since the front cover 7 and the stator assembly are sealed by the molding compound 11, the grounding wire assembly 17 connected to the rear cover 14 in this application can conduct away the static electricity on the rear cover 14 in a timely manner, preventing the formation of induced potential and affecting the normal use of the motor.

[0100] According to another aspect of this application, a plastic-encapsulated motor is provided, including the anti-electro-erosion component as described above.

[0101] The encapsulated motor of this application can conduct electricity between the front and rear bearings and form a circuit, effectively preventing electrical corrosion caused by shaft voltage. Moreover, the structure is encapsulated in the injection molding material and does not come into contact with the complex external environment, so there is no risk of aging and falling off, which can greatly improve reliability and stability.

[0102] The front cover and conductive sheet are connected by rivets. The conductive sheet is fitted into upper and lower frames at both ends and has mounting feet for effective contact with the stator core. It is fixed in place by frame blocks. After injection molding, part of the conductive sheet is exposed from the encapsulation material. The rear cover is installed by connecting the conductive sheet and the rear cover with self-tapping screws, ensuring conductivity between the front and rear covers. The conductive sheet is made of thin metal sheet, stamped and bent, making it small, inexpensive, easy to install, and providing stable and reliable conductivity.

[0103] The manufacturing method of the encapsulated motor of this application is as follows: First, the upper and lower frames are fitted onto the stator core, and the mounting positions on the frames are aligned with the limiting slots of the stator core. The winding is then produced by conventional winding processes. Next, the conductive sheet, a stamped metal sheet, can be bent into shape according to the required size. After forming, it is installed into the upper and lower frames of the wound stator. The first and second mounting feet are inserted into the bottom fixing slots of the upper and lower frames, respectively, and contact the stator core. The support part is installed into the limiting slot of the stator core. The first and second limiting slots of the conductive sheet are fixedly installed with the side wall mounting posts of the upper and lower frames. The contact platform is fitted with the top mounting platform of the lower frame, and the second mounting hole is aligned with the mounting hole of the lower bracket. Then, rivets are driven into the rivet mounting holes of the front end cover and the first mounting hole at one end of the conductive sheet, connecting the conductive sheet and the front end cover. Finally, a frame assembly block is installed on each of the upper and lower frames to fix the conductive sheet. The trapezoidal fixing posts of the frame assembly are installed in conjunction with the trapezoidal mounting grooves of the frame, with the clearance grooves avoiding the protruding side wall mounting posts, thus completing the stator assembly. Further, the stator undergoes an injection molding process to form a molded stator with the encapsulating material. The molded stator has mounting feet for motor installation and recessed mounting platforms for exposing the second mounting holes on the conductive sheets, the contact platform, and the mounting holes on the lower frame. The remaining conductive sheets are encapsulated within the encapsulating material. The rotor assembly is a conventional structure, including a shaft, front and rear bearings, and a permanent magnet rotor. The rear end cover, in addition to the end cover mounting feet for motor installation and the rear bearing housing, also has a mounting recess with mounting holes and a rear contact surface, as well as a grounding hole. Finally, in the electronic assembly process, the rotor assembly is installed into the molded stator, the rear end cover is closed and secured with assembly screws, and a grounding wire assembly is installed to ground the motor. Finally, self-tapping screws are driven into the mounting holes of the rear end cover to establish contact and expose the conductive sheets.

[0104] The detailed structural descriptions of each component of the encapsulated motor in this application are as follows:

[0105] 1. The stator core 1 is a stator core structure used in conventional motors, with an axial square groove 11 on one side wall;

[0106] 2. The lower frame 2 is designed in conjunction with the stator core 1. Three terminals 21 are provided on the upper side of one side for motor winding wiring; a boss is provided on one side, the upper top surface is the top mounting platform 22, a round hole is provided on it as a mounting hole 23, there is a trapezoidal mounting groove 24 on each side, a wedge-shaped side wall mounting post 25 on the right side, and a square shallow groove is provided at the bottom as a bottom fixing groove 26.

[0107] 3. The upper frame 3 is similar in structure to the lower frame 2. It also has a boss on one side. The top is a top mounting platform 31. There is a trapezoidal mounting groove 32 on each side and a wedge-shaped side wall mounting column 33 on the right side. The bottom of the upper frame 33 has a square shallow groove bottom fixing groove 34.

[0108] 4. When producing the wound stator 5, the lower frame 2 and the upper frame 3 are first inserted and fitted onto the stator core 1. Note that the bosses of the frames are aligned with the limiting slots 11. Then the winding 4 is wound. The lower frame 2 and the upper frame 3 provide insulation for the stator core 1 and the winding 4.

[0109] 5. The conductive sheet 6 is a thin metal sheet, stamped and formed, and is provided with a waist-shaped first mounting hole 61, a long waist-shaped first limiting groove 62, a trapezoidal first mounting foot 63 below it, a support part 64, a trapezoidal second mounting foot 65 above it, a long waist-shaped second limiting groove 66 below it, and finally a contact plane 68 and a waist-shaped second mounting hole 67 provided on it. Figure 21 The dotted lines indicate bends; the lengths of each part can be adjusted as needed.

[0110] 6. The front cover 7 is provided with a front bearing chamber 71, and the flange is provided with evenly distributed rivet mounting holes 72. For error prevention during production, any one of them can be used.

[0111] 7. The frame assembly 8 is a rectangular plastic piece made of the same material as the frame. There are two trapezoidal fixing posts 82 on one side wall, and a rectangular clearance groove 81 is provided in the middle of one side.

[0112] 8. When producing the stator, conductive plates 6 need to be installed on the wound stator 5 first. The first mounting foot 63 is inserted into the bottom fixing groove 34, and the second mounting foot 65 is installed into the bottom fixing groove 26. The conductive plate is in direct contact with the stator core 1 at this point and completes axial limiting. The support part 64 is installed into the limiting groove 11. The second limiting groove 62 is inserted into the side wall mounting post 33, and the second limiting groove 66 is inserted into the side wall mounting post 25. Since both side wall mounting posts are wedge-shaped, they can effectively prevent the conductive plate 6 from radially coming out and complete radial limiting. The contact plane 68 coincides with the top mounting platform 22, and the second mounting hole 67 is aligned with the mounting hole 23.

[0113] 9. When producing stator 10, rivets 9 are needed to fix and connect the first mounting hole 61 and rivet mounting hole 72. Conductive sheet 6 is connected to front end cover 7. A block 8 is also needed to be installed on the upper and lower frames. Trapezoidal fixing column 82 is assembled with trapezoidal mounting groove 32. Avoidance groove 81 is used to avoid the protruding side wall mounting column 33.

[0114] 10. After injection molding, the stator 10 is produced into a plastic-encapsulated stator 12. The plastic-encapsulated part 11 is provided with an installation platform 111, exposing the contact plane 68, the second mounting hole 67 and the mounting hole 23. The other side exposes the terminal post 21, and the outer peripheral sidewall is provided with evenly distributed mounting feet 112.

[0115] 11. In the encapsulated stator 12, the conductive sheet 6 is wrapped inside the encapsulated part 11, with only the contact plane 68 and the second mounting hole 67 exposed outside through the mounting platform 11.

[0116] 12. The rotor assembly 13 consists of a front bearing 132, a permanent magnet rotor 133, and a rear bearing 134 sequentially mounted on a rotating shaft 131.

[0117] 13. The rear end cover 14 is bowl-shaped, with four evenly distributed end cover mounting feet 141 on the outer periphery, a rear bearing chamber 142 in the middle of the inner side, and a mounting recess 143 on the outer periphery with a mounting hole 144 in the middle. The bottom of the inner wall is the rear contact surface 145, and a grounding hole 146 is provided above it.

[0118] 14. The final assembly process of the motor is as follows: the rotor assembly 13 is installed into the inner cavity of the plastic-encapsulated stator 12 and the rear end cover 14 is closed. The end cover mounting feet 141 and 112 are aligned and the assembly screw assembly 15 is installed. The grounding wire assembly 17 is installed in the grounding hole 146. The mounting hole 144 is aligned with the second mounting hole 67 and the mounting hole 23 and the self-tapping screws 16 are installed to complete the overall assembly of the motor.

[0119] 15. The front bearing 132 is installed in the front bearing housing 71 and makes contact with the front cover 7, establishing electrical continuity. Rivet 9 connects the front cover 7 to the conductive plate 6, establishing electrical continuity. The conductive plate 6 makes contact with both sides of the stator core 1. The contact plane 68 exposes the plastic seal 11. When the rear cover 14 is installed, the rear contact surface 145 makes contact with the contact platform 68, and is fixed and stably contacted by self-tapping screws 16. The conductive plate 6 makes contact with the rear cover 14 via self-tapping screws 16. The rear bearing 134 is installed in the rear bearing housing 142 and makes contact with the rear cover 14, establishing electrical continuity. At this point, the front and rear bearing housings are connected, and further grounded through the grounding wire assembly 17.

[0120] Assembly sequence:

[0121] 1. The lower frame 2 and the upper frame 3 are assembled to form the stator core 1;

[0122] 2. Winding 4 is performed to form a wound stator 5;

[0123] 3. Conductive sheet 6 is bent into shape as needed;

[0124] 4. The conductive sheet 6 is inserted into the winding stator 5 and fixed by the frame assembly block 8; the rivet 9 connects the front end cover 7 and the conductive sheet 6 to form the stator 10;

[0125] 5. The stator 10 is inserted into the injection mold and the sealing component 11 is added for injection molding to form the sealed stator 12;

[0126] 6. Assemble rotor assembly 13;

[0127] 7. Insert the rotor assembly 13 into the injection-molded stator 12, close the rear end cover 14, and install the assembly screw assembly 15, grounding wire assembly 17 and self-tapping screws 16 in sequence to complete the motor assembly.

[0128] The conduction sequence of the front and rear end caps:

[0129] Front bearing 132 – Front bearing housing 71 – Rivet 9 – Conductive plate 6 – Rear end cover 14 (self-tapping screw 16) – Rear bearing housing 142 – Rear bearing 134.

[0130] It will be readily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

[0131] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above description is merely a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. An anti-electrolytic corrosion component, characterized in that, include: The front end cover (7), stator assembly, plastic seal (11) and rear end cover (14) are provided, wherein the front end cover (7) and the stator assembly are disposed within the plastic seal (11); the stator assembly has a connection area exposed outside the plastic seal (11), and the rear end cover (14) is connected to the stator assembly via the connection area; A conductive element is embedded in the encapsulation (11). The conductive element extends from the front end cover (7) to the rear end cover (14). One end of the conductive element is connected to the front end cover (7), and the other end of the conductive element is located in the connection area and connected to the rear end cover (14). The stator assembly includes a frame, and a portion of the end face of the frame along the axial direction of the stator assembly is exposed on the molding compound (11) to form the connection area. The conductive element includes a conductive sheet (6), and a mounting foot is provided on the bottom surface of the conductive sheet (6). The frame body is provided with a mounting groove at a position corresponding to the mounting foot and the side wall of the conductive sheet (6) to accommodate the portion between the mounting foot and the side wall of the conductive sheet (6). The frame also includes a modular block (8), which is shaped to fit into the mounting groove and clamps the portion between the mounting foot and the side wall of the conductive sheet (6).

2. The anti-electrolytic corrosion component according to claim 1, characterized in that: The connection area is provided with a mounting hole (23), the rear end cover (14) is connected to the mounting hole (23) by a screw (16), and the other end of the conductive element is sandwiched between the rear end cover (14) and the mounting hole (23).

3. The anti-electrolytic corrosion component according to claim 1 or 2, characterized in that: The conductive sheet (6) is configured as a U-shaped groove structure, and the stator assembly is partially filled inside the conductive sheet (6).

4. The anti-electrolytic corrosion component according to claim 3, characterized in that: The mounting feet are positioned at the points where the frame and the stator core (1) of the stator assembly meet; the mounting feet are inserted between the frame and the stator core (1).

5. The anti-electrolytic corrosion component according to claim 4, characterized in that: The frame has a fixing groove on the end face that abuts against the stator core (1), and the mounting feet are inserted into the fixing groove.

6. The anti-electrolytic corrosion component according to claim 4 or 5, characterized in that: The stator core (1) has a limiting groove (11) along the axial direction on its side wall, and the bottom of the conductive sheet (6) is matched in the limiting groove (11).

7. The anti-electrolytic corrosion component according to claim 4 or 5, characterized in that: The bottom of the groove of the conductive sheet (6) is stepped at the mounting foot.

8. The anti-electrolytic corrosion component according to claim 1, characterized in that: The rear end cover (14) is connected to a grounding wire assembly (17). The grounding wire assembly (17) includes a grounding hole (146) and a grounding wire. The grounding hole (146) is located on the end cover, and one end of the grounding wire is connected to the grounding hole (146) by a screw (16).

9. A plastic-encapsulated motor, characterized in that, Includes the anti-electro-erosion component as described in any one of claims 1-8.

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