Electric corrosion prevention assembly and plastic package motor

Abstract

The invention provides an electric corrosion prevention assembly and a plastic package motor. The electric corrosion prevention assembly comprises a front end cover, a stator assembly, a plastic package part and a rear end cover, wherein the front end cover and the stator assembly are arranged in the plastic package part; the stator assembly is provided with a connecting area exposed out of the plastic package part, and the rear end cover is connected to the stator assembly through the connecting area. And the conductive part is embedded in the plastic package part, one end of the conductive part is connected with the front end cover, and the other end of the conductive part is arranged in the connecting area and connected with the rear end cover. The conductive part is embedded in the plastic package part, direct electric conduction of the front end cover and the rear end cover is achieved, electric corrosion caused by shaft voltage is effectively prevented, the whole conductive part is arranged in a plastic package mode, the falling-off danger is avoided, and reliability and stability are greatly improved.

Description

Technical Field

[0001] The present application belongs to the technical field of plastic-encapsulated motors, and specifically relates to an anti-electro-corrosion component and a plastic-encapsulated motor. Background Art

[0002] In existing plastic-sealed motors, the stator core is insulated from the front and rear end covers after the stator is plastic-sealed. Due to the 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 causes the oil film on the front bearing raceway to be broken down by the shaft voltage, and the inner and outer wheels and balls to produce electrical corrosion, which seriously affects the service life of the motor. Therefore, plastic-sealed motors must be equipped with an anti-electrocorrosion structure to conduct the front and rear bearings to avoid damage caused by the shaft voltage.

[0003] There are many common plastic-encapsulated motor anti-corrosion structures, but it is difficult to strike a balance between cost and reliability. For example, bearings with insulating structures are very reliable but are expensive. Anti-static tapes are low in cost but are prone to aging and loosening and cannot meet the needs of high-power motors. The external single-core copper wire screws fixed to the front and rear end covers are simple in structure, but the operation time is long, and the simple-to-operate built-in copper tape cannot ensure effective contact. Although the split conductive terminal structure itself has a simpler structure, it has relatively more operating procedures. Summary of the invention

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

[0005] In order to solve the above problems, the present application provides an anti-electrocorrosion component, comprising:

[0006] A front end cover, a stator assembly, a plastic package and a rear end cover, wherein the front end cover and the stator assembly are arranged in the plastic package; the stator assembly is provided with a connection area exposed to the plastic package, and the rear end cover is connected to the stator assembly via the connection area;

[0007] The conductive member is embedded in the plastic package, one end of which is connected to the front end cover, and the other end of which is arranged in the connection area and connected to the rear end cover.

[0008] In some embodiments,

[0009] The stator assembly includes a skeleton, and a portion of the end surface of the skeleton along the axial direction of the stator assembly is exposed from the plastic packaging part to form the connection area; a mounting hole is provided on the connection area, and the rear end cover is connected to the mounting hole by screws, and the other end of the conductive part is clamped between the rear end cover and the mounting hole.

[0010] In some embodiments,

[0011] The conductive member comprises a conductive sheet, the conductive sheet is configured as a U-shaped slot structure, and the stator assembly is partially filled in the conductive sheet.

[0012] In some embodiments,

[0013] A mounting foot is provided on the bottom surface of the conductive sheet, and the mounting foot is arranged at a position corresponding to the position where the frame of the stator assembly and the stator core abut against each other; the mounting foot is inserted between the frame and the stator core.

[0014] In some embodiments,

[0015] The frame is provided with a fixing groove on the end surface abutting against the stator core, and the mounting foot is inserted into the fixing groove.

[0016] In some embodiments,

[0017] A limiting groove is axially arranged on the side wall of the stator core, and the groove bottom of the conductive sheet is matched and arranged in the limiting groove.

[0018] In some embodiments,

[0019] The groove bottom of the conductive sheet is set in a stepped shape at the mounting foot, and a mounting groove is provided on the main body of the skeleton at a position corresponding to the portion between the mounting foot and the side wall of the conductive sheet to accommodate the portion between the mounting foot and the side wall of the conductive sheet.

[0020] In some embodiments,

[0021] The frame also includes a block, which is buckled on the mounting groove in a matching shape to clamp the portion between the mounting foot and the side wall of the conductive sheet.

[0022] In some embodiments,

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

[0024] According to another aspect of the present application, a plastic-encapsulated motor is provided, comprising the anti-electro-corrosion assembly as described above.

[0025] The present application provides an anti-electro-corrosion component, comprising: a front end cover, a stator assembly, a plastic package and a rear end cover, wherein the front end cover and the stator assembly are arranged in the plastic package; the stator assembly is provided with a connection area exposed to the plastic package, and the rear end cover is connected to the stator assembly via the connection area; a conductive member is buried in the plastic package, one end of which is connected to the front end cover, and the other end is arranged in the connection area and connected to the rear end cover.

[0026] This application has the following beneficial effects:

[0027] By burying the conductive parts in the plastic package, direct electrical conduction between the front and rear end covers is achieved, effectively preventing electrical corrosion caused by shaft voltage. The entire conductive part is plastic-sealed, which is easy to operate and has no risk of falling off, greatly improving reliability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the implementation methods or the prior art descriptions. The drawings described below are merely exemplary, and for those of ordinary skill in the art, other implementation drawings can be derived from the provided drawings without creative work.

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

[0030] Figure 2 It is a cross-sectional schematic diagram of the injection-molded stator structure of an embodiment of the present application;

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

[0032] Figure 4 A schematic diagram of an injection-molded stator from another perspective of an embodiment of the present application;

[0033] Figure 5 This is a schematic structural diagram of the rear end cover of an embodiment of the present application;

[0034] Figure 6 is a cross-sectional schematic diagram of a rear end cover of an embodiment of the present application;

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

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

[0037] Fig. 9 For the embodiment of this application Figure 8 Middle partial enlarged picture;

[0038] Fig.10 A schematic diagram of a conductive sheet according to an embodiment of the present application being assembled on a stator;

[0039] Fig.11 For the embodiment of this application Fig.10 Middle partial upward structural diagram;

[0040] Fig.12A schematic diagram of the structure of the puzzle blocks of an embodiment of the present application;

[0041] Fig.13 This is a schematic structural diagram of a front end cover of an embodiment of the present application;

[0042] Fig.14 This is a schematic structural diagram of a wound stator according to an embodiment of the present application;

[0043] Fig.15 This is a schematic structural diagram of a stator core according to an embodiment of the present application;

[0044] Fig.16 This is a schematic diagram of the structure of the lower frame of an embodiment of the present application;

[0045] Fig.17 For the embodiment of this application Fig.16 Middle partial upward view schematic diagram;

[0046] Fig.18 This is a schematic diagram of the structure of the upper frame of an embodiment of the present application;

[0047] Fig.19 For the embodiment of this application Fig.18 Middle partial upward view schematic diagram;

[0048] Fig. 20 A schematic diagram of the structure of a conductive sheet according to an embodiment of the present application;

[0049] Fig.21 It is a schematic diagram of the unfolded structure of the conductive sheet according to an embodiment of the present application.

[0050] The reference numerals are as follows:

[0051] 1. stator core; 11. limit slot;

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

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

[0054] 4. Winding;

[0055] 5. Winding stator;

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

[0057] 7. Front end cover; 71. Front bearing chamber; 72. Rivet mounting hole;

[0058] 8. Block; 81. Avoidance groove; 82. Trapezoidal fixed column;

[0059] 9. Rivets; 10. Stator;

[0060] 11. Plastic sealing parts; 111. Installation platform;

[0061] 12. Plastic sealed stator;

[0062] 13. rotor assembly; 131. rotating shaft; 132. front bearing; 133. permanent magnet rotor; 134. rear bearing;

[0063] 14. rear end cover; 141. end cover mounting foot; 142. rear bearing chamber; 143. mounting recess; 144. mounting hole; 145. rear contact surface; 146. ground wire hole;

[0064] 15. Screw assembly; 16. Screw; 17. Ground wire assembly. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0068] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0069] See also Figures 1 to 21 As shown, according to an embodiment of the present application, an anti-electrocorrosion component includes:

[0070] A front end cover 7, a stator assembly, a plastic package 11 and a rear end cover 14, wherein the front end cover 7 and the stator assembly are arranged in the plastic package 11; the stator assembly is provided with a connection area exposed to the plastic package 11, and the rear end cover 14 is connected to the stator assembly via the connection area;

[0071] The conductive member is embedded in the plastic package 11 , one end of which is connected to the front end cover 7 , and the other end of which is disposed in the connection area and connected to the rear end cover 14 .

[0072] The present application achieves direct electrical conduction between the front and rear end covers 14 by burying a conductive part in the plastic package 11, thereby effectively preventing electrical corrosion caused by the shaft voltage. The entire conductive part is plastic-sealed and has no risk of falling off, thereby greatly improving reliability and stability.

[0073] A conductive part is used to directly connect the front and rear end covers 14, and this conductive part is plastic-sealed in the plastic sealing part 11. It has excellent conductive performance and is not affected by the external environment. It can ensure that there is no voltage difference between the front and rear end covers 14, and prevent the oil film in the bearing raceway from being broken down by the shaft voltage to form electrical corrosion, thereby increasing the service life of the motor.

[0074] Since conductive parts are directly used to conduct electricity, even when used in high-power motors, it can provide sufficient protection against large shaft voltages and avoid electrical corrosion.

[0075] In some embodiments,

[0076] The stator assembly includes a skeleton, a portion of the end surface of the skeleton along the axial direction of the stator assembly is exposed on the plastic package 11, forming the connection area; a mounting hole 23 is provided on the connection area, the rear end cover 14 is connected to the mounting hole 23 via a screw 16, and the other end of the conductive member is clamped between the rear end cover 14 and the mounting hole 23.

[0077] The connection method between the conductive member and the rear end cover 14 is to set a connection area on the frame of the stator assembly, set a mounting hole 23 at the connection area, and fix the rear end cover 14 and the conductive member together by screws 16. The whole operation is simple and the structure is simple.

[0078] In some embodiments,

[0079] The conductive member includes a conductive sheet 6 , the conductive sheet 6 is configured as a U-shaped slot structure, and the stator assembly is partially filled in the conductive sheet 6 .

[0080] The conductive part adopts a sheet-shaped conductive sheet 6, which is a U-shaped groove as a whole. The stator assembly is clamped 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-shaped conductive sheet 6 is easy to make, simple to install and operate, and the conductive contact is stable and reliable.

[0081] In some embodiments,

[0082] The bottom surface of the conductive sheet 6 is provided with a mounting foot, and the mounting foot is provided at a position corresponding to the position where the frame of the stator assembly and the stator core 1 abut against each other; the mounting foot is inserted between the frame and the stator core 1 .

[0083] Mounting feet are provided on the conductive sheet 6, and are inserted between the frame and the stator core 1, so that the axial limiting effect between the conductive sheet 6 and the stator assembly can be improved; since frames are usually provided at both ends of the stator core 1, two mounting feet are also provided, so that the two mounting feet clamp the stator core 1, and the assembly position is limited, thereby making the assembly simple and convenient.

[0084] In some embodiments,

[0085] The frame is provided with a fixing groove on the end surface abutting against the stator core 1 , and the mounting foot is inserted into the fixing groove.

[0086] Based on the above-mentioned conductive sheet 6 having a mounting foot interface inserted between the frame and the stator core 1, the present application provides a fixing groove on the end face of the frame close to the stator core 1 to facilitate the insertion of the mounting foot; this does not affect the overall structure of the stator core 1.

[0087] In some embodiments,

[0088] A limiting groove 11 is axially provided on the side wall of the stator core 1 , and the groove bottom of the conductive sheet 6 is matched and arranged in the limiting groove 11 .

[0089] As for the path that the conductive sheet 6 passes along the axial direction of the stator core 1, the present application limits it on the side wall of the stator core 1, and sets a limiting groove 11 on the side wall, so that the conductive sheet 6 is partially buried in the limiting groove 11. During installation, the conductive sheet 6 needs to be placed in the limiting groove 11, and the limiting groove 11 limits the conductive sheet 6 in the horizontal direction perpendicular to the motor shaft. The limiting groove 11 realizes the standardized installation of the position of the conductive sheet 6. At the same time, the conductive sheet 6 is located in the limiting groove 11, which avoids excessive plastic sealing material entering between the stator core 1 and the conductive sheet 6 due to excessive injection pressure of the plastic sealing material during the injection molding process, thereby causing the conductive sheet 6 to deform and protrude.

[0090] The contact between the conductive sheet 6 and the stator core 1, and the stator core 1 itself can also play an auxiliary conductive role, but not a major conductive role. This is because the stator core 1 itself is made of laminated silicon steel sheets to prevent eddy current loss. When the stator core 1 acts as an anti-electrolytic corrosion structure, it is limited by the process precision. There are differences in the lamination coefficient of the silicon steel sheets, which leads to differences in resistance when the stator core 1 of the same stacking thickness participates in conduction, affecting the shaft voltage data of the finished motor and affecting the qualification judgment of the motor. The use of the conductive sheet 6 structure can ensure that the shaft voltage will not cause harmful damage regardless of whether it contacts the stator core 1.

[0091] In some embodiments,

[0092] The groove bottom of the conductive sheet 6 is set in a stepped shape at the mounting foot, and a mounting groove is provided on the main body of the skeleton at a position corresponding to the portion between 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.

[0093] The conductive sheet 6 is arranged in a stepped manner on the outer wall of the frame, and part of the conductive sheet 6 is arranged in the mounting groove on the frame. The conductive sheet 6 is positioned by the mounting groove on the frame to prevent deformation during the injection molding process.

[0094] In some embodiments,

[0095] The frame also includes a block 8 , which is buckled into the mounting groove in a matching manner to clamp the portion between the mounting foot and the side wall of the conductive sheet 6 .

[0096] The framework positions the conductive sheet 6 and uses a block 8 that matches the mounting groove to clamp the conductive sheet 6, so that it is not easy to fall off and is convenient for injection molding.

[0097] In some embodiments,

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

[0099] Since the front end cover 7 and the stator assembly are injection-sealed by the plastic sealing member 11, the present application connects the grounding wire assembly 17 to the rear end cover 14, which can promptly conduct away the static electricity on the rear end cover 14 to prevent the formation of induced potential and affect the normal use of the motor.

[0100] According to another aspect of the present application, a plastic-encapsulated motor is provided, comprising the anti-electro-corrosion assembly as described above.

[0101] The plastic-sealed motor of the present application can conduct the front and rear bearings and form a circuit, which can effectively prevent electrical corrosion caused by shaft voltage. In addition, the structure is plastic-sealed in the injection molding material and is not exposed to the complex external environment. There is no risk of aging and falling off, which can greatly improve reliability and stability.

[0102] Among them, the front cover and the conductive sheet are connected by rivets, the two ends of the conductive sheet are respectively installed in the upper and lower frames and are provided with mounting feet to effectively contact the stator core, and are fixed and installed by the frame blocks. After the overall injection molding, the conductive sheet is partially exposed from the plastic packaging material, and the rear cover is installed by connecting the conductive sheet and the rear cover by self-tapping screws, so that the front and rear covers are conductive. The conductive sheet is made of metal sheets by stamping and bending, with small size, low price, simple installation, and stable and reliable conductive contact.

[0103] The production method of the plastic-sealed motor of the present application is as follows: first, the upper and lower frames are inserted into the stator core, and the installation positions provided on the frames are aligned with the limiting grooves of the stator core, and the winding is produced by winding the winding according to the conventional process to produce the wound stator; then the conductive sheet is a stamped metal sheet, which can be bent and formed according to the required size, and after forming, it is installed in the upper and lower frames of the wound stator, the first mounting foot and the second mounting foot are respectively inserted into the bottom fixing grooves of the upper frame and the lower frame and contact with the stator core, the support part is installed in the limiting groove of the stator core, the first limiting groove and the second limiting groove of the conductive sheet are respectively fixed to the side wall mounting columns 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 hole of the front end cover and the first mounting hole at one end of the conductive sheet to connect the conductive sheet and the front end cover; then a frame block is installed on the upper and lower frames respectively to fix the conductive sheet, The trapezoidal fixing column of the skeleton block is installed in cooperation with the trapezoidal mounting groove of the skeleton, and the avoidance groove avoids the protruding side wall mounting column, so that the stator is completed; further, the stator completes the injection molding process and forms a plastic-encapsulated stator with the plastic encapsulation material, and the plastic-encapsulated stator has mounting feet for motor installation, and a recessed mounting platform for exposing the second mounting hole and the contact platform on the conductive sheet and the mounting hole on the lower skeleton, and the rest of the conductive sheet is wrapped in the plastic encapsulation material; the rotor assembly is a conventional structure, including a shaft, front and rear bearings and a permanent magnet rotor; in addition to the end cover mounting feet and the rear bearing chamber for motor installation, the rear end cover also has a mounting recess, which is provided with mounting holes and a rear contact surface, and a grounding hole; in the last electronic assembly process, the rotor assembly is installed in the plastic-encapsulated stator, the rear end cover is closed and fixed by assembling the screw assembly, and then the grounding wire assembly is installed to realize the grounding of the motor, and finally self-tapping screws are driven into the mounting holes of the rear end cover to make contact and expose the conductive sheet.

[0104] The detailed description of the structure of each component of the plastic-encapsulated motor in this application is as follows:

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

[0106] 2. The structure of the lower frame 2 is designed to match the stator core 1. Three terminal posts 21 are provided on the upper side of one side for wiring the motor winding; a boss is provided on one side, and the upper top surface is a top mounting platform 22, on which a round hole is provided as a mounting hole 23, and there are trapezoidal mounting grooves 24 on the left and right sides of the side, and a wedge-shaped side wall mounting column 25 on the right side, and a square shallow groove is provided at the bottom as a bottom fixing groove 26.

[0107] 3. The structure of the upper frame 3 is similar to that of the lower frame 2. A boss is also provided on one side. The top is a top mounting platform 31. There are trapezoidal mounting grooves 32 on the left and right sides of the upper frame 3. There is a wedge-shaped side wall mounting column 33 on the right side. A square shallow bottom fixing groove 34 is provided at the bottom.

[0108] 4. When the winding stator 5 is produced, the lower frame 2 and the upper frame 3 are first inserted and mounted on the stator core 1. Note that the frame bosses are all facing the limit grooves 11, and 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 metal sheet formed by stamping, 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, and then a supporting portion 64, a trapezoidal second mounting foot 65 above the back, 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 thereon. Fig.21 The dotted lines shown are the bending points, and the specific length settings of each part can be adjusted according to actual needs.

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

[0111] 7. The frame block 8 is a rectangular plastic piece made of the same material as the frame. Two left and right trapezoidal fixing columns 82 are provided on one side wall, and a rectangular avoidance groove 81 is also provided at a position on one side in the middle.

[0112] 8. When producing the stator, it is necessary to first install the conductive sheet 6 on the wound stator 5, the first mounting foot 63 is inserted into the bottom fixing groove 34, the second mounting foot 65 is inserted into the bottom fixing groove 26, the conductive sheet is in direct contact with the stator core 1 here, and the axial limit is completed; the support part 64 is inserted into the limit groove 11; the second limit groove 62 is inserted into the side wall mounting column 33, and the second limit groove 66 is inserted into the side wall mounting column 25. Since the two side wall mounting columns are wedge-shaped, the conductive sheet 6 can be effectively prevented from radially escaping and radial limit is completed; 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 the stator 10, it is necessary to use rivets 9 to fix the first mounting hole 61 and the rivet mounting hole 72, and the conductive sheet 6 is connected to the front cover 7; it is also necessary to install a puzzle 8 on each of the upper and lower frames, and the trapezoidal fixing column 82 is assembled with the trapezoidal mounting groove 32, and the avoidance groove 81 is used to avoid the protruding side wall mounting column 33.

[0114] 10. The stator 10 is produced into a plastic-encapsulated stator 12 after injection molding. A mounting platform 111 is provided on the plastic-encapsulated part 11, exposing the contact plane 68, the second mounting hole 67 and the mounting hole 23, and the terminal 21 is exposed on the other side. Uniformly distributed mounting feet 112 are provided on the outer peripheral side wall.

[0115] 11. In the plastic-encapsulated stator 12 , the conductive sheet 6 is wrapped in the plastic-encapsulated component 11 , and only the contact plane 68 and the second mounting hole 67 are exposed outside through the mounting platform 11 .

[0116] 12. The rotor assembly 13 is a rotating shaft 131 on which a front bearing 132, a permanent magnet rotor 133 and a rear bearing 134 are sequentially assembled.

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

[0118] 14. The final assembly process of the motor is to install the rotor assembly 13 into the inner cavity of the plastic-sealed stator 12 and close the rear end cover 14, align the end cover mounting feet 141 and the mounting feet 112 and install the assembly screw assembly 15, install the ground wire assembly 17 in the ground wire hole 146, align the mounting hole 144 with the second mounting hole 67 and the mounting hole 23 and install the self-tapping screw 16 to complete the overall assembly of the motor.

[0119] 15. The front bearing 132 is installed in the front bearing chamber 71, and is in contact with the front end cover 7; the rivet 9 connects the front end cover 7 and the conductive sheet 6, and is in contact with and conductive; the conductive sheet 6 is in contact with both sides of the stator core 1; the contact plane 68 is exposed from the plastic seal 11, and when the rear end cover 14 is installed, the rear contact surface 145 is in contact with the contact platform 68, and is fixed and stably contacted by the self-tapping screw 16, and the conductive sheet 6 is in contact with the rear end cover 14 through the self-tapping screw 16; the rear bearing 134 is installed in the rear bearing chamber 142, and is in contact with and conductive with the rear end cover 14. At this point, the front and rear bearing chambers are conductive, and further contact the ground through the grounding wire assembly 17.

[0120] Assembly sequence:

[0121] 1. The stator core 1 is mounted on the lower frame 2 and the upper frame 3;

[0122] 2. Winding the winding 4 to form a winding stator 5;

[0123] 3. The conductive sheet 6 is bent and formed as required;

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

[0125] 5. The stator 10 is placed in an injection mold and the plastic sealing part 11 is added for injection molding to form a plastic sealing stator 12;

[0126] 6. Assemble the rotor assembly 13;

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

[0128] The turn-on sequence of the front and rear end covers:

[0129] Front bearing 132 —front bearing chamber 71 —rivet 9 —conductive sheet 6 —rear end cover 14 (self-tapping screw 16 ) —rear bearing chamber 142 —rear bearing 134 .

[0130] It is easy for those skilled in the art to understand that the above-mentioned implementation modes can be freely combined and superimposed without conflict.

[0131] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An anti-electrocorrosion component, characterized in that: include: A front end cover (7), a stator assembly, a plastic sealing member (11) and a rear end cover (14), wherein the front end cover (7) and the stator assembly are arranged in the plastic sealing member (11); the stator assembly is provided with a connection area exposed outside the plastic sealing member (11), and the rear end cover (14) is connected to the stator assembly via the connection area; The conductive member is embedded in the plastic sealing member (11), one end of which is connected to the front end cover (7), and the other end of which is arranged in the connection area and connected to the rear end cover (14).

2. The anti-electro-corrosion assembly according to claim 1, characterized in that: The stator assembly comprises a skeleton, wherein a portion of the end surface of the skeleton along the axial direction of the stator assembly is exposed outside the plastic sealing member (11), forming the connection area; a mounting hole (23) is provided on the connection area, the rear end cover (14) is connected to the mounting hole (23) via a screw (16), and the other end of the conductive member is clamped between the rear end cover (14) and the mounting hole (23).

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

4. The anti-electro-corrosion assembly according to claim 3, characterized in that: A mounting foot is provided on the bottom surface of the conductive sheet (6), and the mounting foot is provided at a position corresponding to a position where the frame of the stator assembly and the stator core (1) abut against each other; the mounting foot is inserted between the frame and the stator core (1).

5. The anti-electro-corrosion assembly according to claim 4, characterized in that: The frame is provided with a fixing groove on the end surface abutting against the stator core (1), and the mounting foot is inserted into the fixing groove.

6. The anti-electro-corrosion assembly according to claim 4 or 5, characterized in that: A limiting groove (11) is axially provided on the side wall of the stator core (1), and the groove bottom of the conductive sheet (6) is matched and arranged in the limiting groove (11).

7. The anti-electro-corrosion assembly according to claim 4 or 5, characterized in that: The groove bottom of the conductive sheet (6) is arranged in a stepped shape at the mounting foot, and a mounting groove is arranged on the main body of the frame at a position corresponding to the portion between the mounting foot and the side wall of the conductive sheet (6), so as to accommodate the portion between the mounting foot and the side wall of the conductive sheet (6).

8. The anti-electro-corrosion assembly according to claim 7, characterized in that: The frame also includes a block (8), which is buckled on the mounting groove in a matching manner and clamps the portion between the mounting foot and the side wall of the conductive sheet (6).

9. The anti-electro-corrosion assembly according to claim 1, characterized in that: The rear end cover (14) is connected to a grounding wire assembly (17), and the grounding wire assembly (17) comprises a grounding wire hole (146) and a grounding wire. The grounding wire hole (146) is provided on the end cover, and one end of the grounding wire is connected to the grounding wire hole (146) via a screw (16).

10. A plastic-encapsulated motor, characterized in that: The invention comprises an anti-electro-corrosion component as described in any one of claims 1 to 9.

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