Plastic package stator, plastic package end cover and plastic package motor

Abstract

The utility model provides a plastic package stator, a plastic package end cover and a plastic package motor, the plastic package stator comprises a plastic package housing, one end of the plastic package housing is provided with an opening for the plastic package end cover to cover; the opening is provided with an inner peripheral wall which is in interference fit with the plastic package end cover; a first stress blocking groove is formed in the inner circumferential wall. The plastic package end cover is provided with an insertion part, the plastic package end cover is used for being inserted into the opening of the plastic package stator through the insertion part, and the insertion part is provided with a peripheral wall in interference fit with the inner wall of the opening; and a second stress blocking groove is formed in the outer peripheral wall. Through the designed first stress blocking groove and the designed second stress blocking groove, it can be guaranteed that circumferential tangential extrusion stress in interference fit when the plastic package end cover and the plastic package stator are assembled can be effectively released, and deformation generated by the environment temperature after the plastic package stator and the plastic package end cover are combined can be adjusted easily; the problems of loosening of the plastic package end cover and cracking of the joint after the plastic package end cover and the plastic package stator are combined can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic-sealed motors, and in particular relates to a plastic-sealed stator, a plastic-sealed end cover and a plastic-sealed motor. Background Art

[0002] Currently, most fully encapsulated motors on the market utilize an interference fit between the end cap and stator assembly. When pressed into the stator assembly, the end cap is subjected to axial static pressure from the hydraulic press and extrusion shear stress transmitted to the outer circumference of the end cap. However, due to the inherent properties of the encapsulating compound, the material expands and contracts with temperature, and the effective interference fit between the end cap and stator varies with temperature. Specifically, when the motor is exposed to low temperatures, the effective interference fit decreases, resulting in the end cap and stator failing to meet the pull-out force requirements. The end cap may even come loose from the stator, causing the motor to fail. When the motor is exposed to high temperatures, the interference fit increases, making it difficult to close the end cap and even causing localized cracking at the junction between the stator and end cap, posing a serious safety hazard.

[0003] The industry has also drawn on the experience of traditional plastic-encapsulated motor cover closing. That is, when the plastic-encapsulated end cover and the plastic-encapsulated stator are combined, a method of measuring glue inside the plastic-encapsulated end cover is used to meet the pull-out force requirements of the combination of the plastic-encapsulated end cover and the plastic-encapsulated stator. However, this method of closing the cover with glue is complicated to operate and has extremely high production requirements. This method has the problem of poor quality consistency and will also increase the production cost of the motor. Utility Model Content

[0004] Therefore, the utility model provides a plastic-sealed stator, a plastic-sealed end cover and a plastic-sealed motor, the main purpose of which is to solve the technical problems in the prior art that the joint between the plastic-sealed end cover and the plastic-sealed stator is prone to cracking when the interference fit between the two is large, and is prone to loosening when the interference fit between the two is small.

[0005] In order to solve the above problems, the present invention provides a plastic-sealed stator, which includes a plastic-sealed shell, one end of which has an opening for a plastic-sealed end cover to cover; the opening has an inner peripheral wall for interference fit with the plastic-sealed end cover;

[0006] Wherein, a first stress blocking groove is provided on the inner peripheral wall.

[0007] In some embodiments, the opening has a first hole segment and a flared slot segment provided at one end of the first hole segment along the axial direction of the plastic-encapsulated stator, and the flared slot segment is farther away from the other end of the plastic-encapsulated housing relative to the first hole segment;

[0008] The bottom surface of the expanded slot section is used to provide support for the annular cover edge of the plastic-sealed end cover, and at least a portion of the hole wall of the first hole section constitutes the inner circumferential wall; the first stress-breaking groove extends from the bottom surface of the expanded slot section on the hole wall of the first hole section along the axial direction of the plastic-sealed stator.

[0009] In some embodiments, the first stress barrier groove is a semi-cylindrical groove, and a center line of the semi-cylindrical groove is parallel to an axis of the plastic-encapsulated stator.

[0010] In some embodiments, the plastic-encapsulated housing has a rotor installation cavity and a first bearing chamber inside. The rotor installation cavity is used to install a rotor sleeved on the rotating shaft, and the first bearing chamber is used to install a bearing that provides support for the rotating shaft.

[0011] A first ventilation groove is provided on the inner wall of the first bearing chamber, and the first ventilation groove connects the first bearing chamber and the rotor installation cavity.

[0012] In some embodiments, the plastic-encapsulated housing is provided with two or more groups of load mounting holes, wherein the plastic-encapsulated stator can be mounted on different loads through different groups of load mounting holes.

[0013] In some embodiments, the number of load mounting holes in each load mounting hole group is equal and corresponds one to one; the one-to-one corresponding load mounting holes share the same vibration damping pad, and each vibration damping pad is provided with a bolt through hole connected to the corresponding load mounting hole.

[0014] The present invention further provides a plastic-sealed end cover, the plastic-sealed end cover having an inserting portion, the plastic-sealed end cover being used to be inserted into the opening of the plastic-sealed stator through the inserting portion, the inserting portion having an outer peripheral wall for interference fit with the inner wall of the opening;

[0015] Wherein, a second stress blocking groove is provided on the outer peripheral wall.

[0016] In some embodiments, the second stress-breaking groove is a flat groove;

[0017] And / or, the number of the second stress-breaking grooves is more than two, and they are evenly arranged around the circumference of the plastic-sealed end cover.

[0018] In some embodiments, a second bearing chamber is provided on the plastic-sealed end cover, and a second ventilation groove is provided on the inner wall of the second bearing chamber; the second bearing chamber has an opening A on the inner side of the plastic-sealed end cover, and the second ventilation groove runs through the end surface of the opening A.

[0019] The utility model further provides a plastic-encapsulated motor, which comprises any one of the above-mentioned plastic-encapsulated stators and / or any one of the above-mentioned plastic-encapsulated end covers.

[0020] The plastic-sealed stator, plastic-sealed end cover and plastic-sealed motor provided by the utility model have the following beneficial effects:

[0021] 1. The designed first stress-blocking groove and second stress-blocking groove can ensure that the circumferential tangential extrusion stress of the interference fit between the plastic-sealed end cover and the plastic-sealed stator during assembly is effectively released, and is conducive to adjusting the deformation caused by the ambient temperature after the plastic-sealed stator and the plastic-sealed end cover are combined. It can solve the problem of loosening of the plastic-sealed end cover and cracking at the joint after the plastic-sealed end cover and the plastic-sealed stator are combined. In addition, the fully plastic-sealed motor containing this new plastic-sealed stator does not need to use the glue dispensing process during the final assembly of the cover, thereby solving the problem of difficulty in controlling the amount of glue used and the complicated process and poor consistency during the cover closing.

[0022] 2. The designed first and second vent grooves help solve the problem of material shortage on the inner wall of the bearing chamber due to poor air ventilation during the injection molding process of the plastic-encapsulated stator and plastic-encapsulated end caps, significantly reducing the scrap rate of the plastic-encapsulated stator and plastic-encapsulated end caps during the injection molding process. The first and second vent grooves are both air pressure balancing grooves. During the final assembly of the plastic-encapsulated motor, the first and second vent grooves effectively balance the air pressure inside and outside the corresponding bearing chambers, allowing air to flow within each bearing chamber, preventing bulging and cracking of the bearing chambers and the suffocation of the bearings.

[0023] 3. The plastic-encapsulated motor can be installed on different loads through different groups of load mounting holes. This allows the plastic-encapsulated motor to adapt to loads of different sizes, thereby achieving the effect of one machine for multiple uses and one mold for multiple uses of the plastic-encapsulated motor, improving the mold utilization rate of the fully plastic-encapsulated motor, improving the production capacity conversion rate, reducing the mold investment for different load mounting structures, and obtaining a higher production capacity yield at a lower cost.

[0024] 4. When the plastic-sealed motor adopts the plastic-sealed end cover of the present invention, the use of the insulating ring on the control board can be eliminated because the fully plastic-sealed end cover replaces the conventional iron shell end cover, which can avoid the safety hazard of voltage breakdown caused by insufficient electrical gap between the control board components and the original iron shell end cover. It can also greatly enhance the ultimate voltage bearing capacity between the motor control board and the plastic-sealed end cover, effectively save the internal space of the plastic-sealed motor, reduce the overall height of the plastic-sealed motor, make the plastic-sealed motor smaller, and save more materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. For those skilled in the art, other implementation drawings can be derived from the provided drawings without inventive effort.

[0026] Figure 1 This is a structural schematic diagram of a plastic-sealed stator provided in an embodiment of the present utility model;

[0027] Figure 2 yes Figure 1 A top view of the plastic-encapsulated stator with the vibration damping pad removed;

[0028] Figure 3 This is a structural diagram of a plastic-sealed end cap provided in an embodiment of the present utility model;

[0029] Figure 4 yes Figure 3 Schematic diagram of the structure of the plastic-sealed end cap from another perspective.

[0030] Figure 5 This is a structural diagram of a plastic-encapsulated motor provided by an embodiment of the present utility model;

[0031] The accompanying drawings are:

[0032] 1. Rotating shaft; 2. Plastic-sealed end cover; 3. Plastic-sealed stator; 4. Vibration-damping pad; 20. Annular cover edge; 21. Second stress-blocking groove; 22. Second bearing chamber; 30. Plastic-sealed shell; 31. Inner circumferential wall; 32. First bearing chamber; 42. Load mounting hole; 201. Plug-in portion; 202. Outer circumferential wall; 203. Opening A; 222. Second ventilation groove; 300. Opening; 301. First hole section; 302. Expanded groove section; 303. The other end of the plastic-sealed shell; 304. Rotor mounting cavity; 311. First stress-blocking groove; 322. First ventilation groove; 401. Bolt through hole; 3021. Bottom surface of the expanded groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0036] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0037] See also Figure 1-2 As shown, according to an embodiment of the present invention, a plastic-encapsulated stator 3 is provided, comprising a plastic-encapsulated housing 30. One end of the plastic-encapsulated housing 30 has an opening 300 for receiving a plastic-encapsulated end cap 2. The opening 300 has an inner circumferential wall 31 for an interference fit with the plastic-encapsulated end cap 2. A first stress-blocking groove 311 is provided on the inner circumferential wall 31.

[0038] In the above example, the plastic-encapsulated end cap 2 is secured to the plastic-encapsulated stator 3 by an interference fit with the inner circumferential wall 31 of the opening. The design of a first stress-blocking groove 311 on the inner circumferential wall 31 effectively releases the circumferential tangential extrusion stress caused by the interference fit between the plastic-encapsulated end cap 2 and the plastic-encapsulated stator 3 during assembly. This also helps regulate deformation caused by ambient temperature after the plastic-encapsulated stator 3 and the plastic-encapsulated end cap 2 are joined together, thereby resolving the problems of loosening of the plastic-encapsulated end cap 2 and cracking at the joint after the plastic-encapsulated end cap 2 and the plastic-encapsulated stator 3 are joined together. Furthermore, the fully plastic-encapsulated motor containing this novel plastic-encapsulated stator 3 does not require the use of a glue dispensing process during final assembly, thereby resolving the problems of difficulty in controlling the amount of glue used and the complex and inconsistent process during assembly.

[0039] It should be noted that the aforementioned plastic-encapsulated stator 3 also includes a stator assembly, which includes a stator core and a coil winding wound on the stator core. The aforementioned plastic-encapsulated housing 30 can be integrally formed on the stator assembly by injection molding, and the stator assembly is covered therein.

[0040] In some embodiments, as Figure 1 As shown, the aforementioned opening 300 may include a first hole segment 301 and a flared slot segment 302 disposed at one end of the first hole segment 301 along the axial direction of the molded stator 3. The flared slot segment 302 is located at the other end 303 of the molded housing relative to the first hole segment 301 and away from the molded housing. The bottom surface 3021 of the flared slot segment is used to provide support for the annular cover edge 20 of the molded end cover 2. At least a portion of the hole wall of the first hole segment 301 constitutes the aforementioned inner circumferential wall 31. The aforementioned first stress-breaking groove 311 extends from the bottom surface 3021 of the flared slot segment along the hole wall of the first hole segment 301 in the axial direction of the molded stator 3, which has the advantage of facilitating the processing of the first stress-breaking groove 311.

[0041] In some embodiments, as Figure 1 As shown, the aforementioned first stress-breaking groove 311 can be a semi-cylindrical groove, and the center line of the semi-cylindrical groove is parallel to the axis of the plastic-encapsulated stator 3, so that the first stress-breaking groove 311 can be processed by a milling cutter, thereby facilitating processing.

[0042] In some embodiments, as Figure 1 As shown, the number of the aforementioned first stress blocking grooves 311 can be more than two, and they are evenly arranged around the axis of the plastic-encapsulated stator 3, so as to further ensure that the circumferential tangential extrusion stress of the interference fit between the plastic-encapsulated end cover 2 and the plastic-encapsulated stator 3 during assembly is effectively released.

[0043] like Figure 1As shown, the interior of the aforementioned plastic housing 30 has a rotor installation cavity 304 and a first bearing chamber 32. The rotor installation cavity 304 is used to install the rotor sleeved on the rotating shaft 1. The first bearing chamber 32 is used to install the bearing that provides support for the rotating shaft 1.

[0044] In the fully plastic-encapsulated motors currently on the market, when the bearings are pressed into the sealed bearing chambers, the air in the bearing chambers will be rapidly compressed. This, coupled with the lubricating grease seal applied to the outer rings of the bearings, will cause the air pressure in the bearing chambers to increase rapidly, leading to an imbalance in the air pressure inside and outside the bearing chambers. This will greatly increase the probability of damage to the bearings and the end cap bearing chambers. In severe cases, this may cause the plastic sealing material in the plastic end cap bearing chambers to bulge and crack. In addition, due to the inability to balance the oil film seal air pressure in the bearing chambers, the bearings may sometimes become stuck and stop rotating, greatly increasing the after-sales failure rate of plastic-encapsulated motors. To solve this problem, in some embodiments, such as Figure 1 and Figure 2 As shown, a first ventilation groove 322 may be opened on the inner wall of the first bearing chamber 32 , and the first ventilation groove 322 communicates with the first bearing chamber 32 and the rotor installation cavity 304 .

[0045] In the above example, since the first vent groove 322 connects the first bearing chamber 32 and the rotor mounting cavity 304, it helps solve the problem of material shortage on the inner wall of the first bearing chamber 32 due to poor air flow during the injection molding process of the plastic-encapsulated stator 3, significantly reducing the scrap rate of the plastic-encapsulated stator 3 during the injection molding process. The first vent groove 322 is a pressure balancing groove. During the final assembly of the plastic-encapsulated motor, the first vent groove 322 effectively balances the air pressure inside and outside the first bearing chamber 32, allowing air to flow within the first bearing chamber 32, thereby preventing bulging of the first bearing chamber 32 and the bearing from suffocating and not rotating.

[0046] In some embodiments, the first vent groove 322 may be a semi-cylindrical groove, and the centerline of the first vent groove 322 is parallel to the centerline of the first bearing chamber 32. The first vent groove 322 extends from one axial end to the other end of the inner wall of the first bearing chamber 32, so that the first vent groove 322 and the inner wall of the first bearing chamber 32 are at the same height.

[0047] In some embodiments, as Figure 1 As shown, the number of the first ventilation grooves 322 may be more than two, and they are evenly arranged along the circumference of the first bearing chamber 32 .

[0048] In some embodiments, as Figure 2As shown, the aforementioned plastic-encapsulated housing 30 may be provided with two or more groups of load mounting holes 42, wherein the plastic-encapsulated stator 3 can be mounted on different loads through different groups of load mounting holes 42. In this way, the plastic-encapsulated motor using the above-mentioned plastic-encapsulated stator 3 can be adapted to loads of different sizes, thereby achieving the effect of one machine for multiple uses and one mold for multiple uses of the plastic-encapsulated motor, improving the mold utilization rate of the fully plastic-encapsulated motor, improving the production capacity conversion rate, reducing the mold investment for different load mounting structures, and obtaining a higher production capacity yield at a lower cost.

[0049] It should be noted that the load mounting holes 42 in each load mounting hole group of the plastic-encapsulated stator 3 are all fixedly connected to the load via bolts.

[0050] In some embodiments, the number of the load mounting holes 42 in each load mounting hole group may be more than two, and they are arranged around the circumference of the plastic-encapsulated stator 3 to improve the connection stability between the plastic-encapsulated stator 3 and the load.

[0051] In some embodiments, as Figure 1 and Figure 2 As shown, the number of load mounting holes 42 in each load mounting hole group is equal and corresponds one to one. The corresponding load mounting holes 42 share the same vibration damping pad 4, and each vibration damping pad 4 is provided with a bolt through hole 401 connected to the corresponding load mounting hole 42.

[0052] In the above example, since the one-to-one corresponding load mounting holes 42 can share the same vibration-damping pad 4, the use of the vibration-damping pad 4 can be saved, thereby reducing costs.

[0053] It should be noted here that the above-mentioned vibration-damping pad 4 can be a flexible plastic pad.

[0054] In a specific application example, Figure 1 and Figure 2 As shown, the load mounting holes 42 can be arranged in two groups, namely a first group of load mounting holes and a second group of load mounting holes. The number of load mounting holes 42 in the first group of load mounting holes is equal to the number of load mounting holes 42 in the second group of load mounting holes, and they correspond one-to-one. Each of the corresponding load mounting holes 42 can form an 8-shaped mounting angle. The corresponding load mounting holes 42 share the same vibration damping pad 4, and each vibration damping pad 4 is provided with a bolt hole 401 that communicates with the corresponding load mounting hole 42, forming an 8-shaped mounting angle.

[0055] like Figure 3 and Figure 4As shown, the present invention further provides a plastic-encapsulated end cap 2, which can be a fully plastic-encapsulated end cap. The plastic-encapsulated end cap 2 has an inserting portion 201, which is used to be inserted into the opening 300 of the plastic-encapsulated stator. The inserting portion 201 has an outer peripheral wall 202 for an interference fit with the inner wall of the opening 300. A second stress-breaking groove 21 is provided on the outer peripheral wall 202.

[0056] In the above example, by providing a second stress-blocking groove 21 on the outer peripheral wall 202 of the plug-in portion of the plastic-sealed end cover 2, it can be ensured that the circumferential tangential extrusion stress of the interference fit between the plastic-sealed end cover 2 and the plastic-sealed stator 3 during assembly is effectively released, and it is beneficial to adjust the deformation caused by the ambient temperature after the plastic-sealed stator 3 is combined with the plastic-sealed end cover 2, and can solve the problem of loosening of the plastic-sealed end cover 2 and cracking of the plastic-sealed stator 3 after the plastic-sealed end cover 2 and the plastic-sealed stator 3 are combined. In addition, the fully plastic-sealed motor containing this new plastic-sealed end cover 2 does not require the use of a glue-dispensing process during the final assembly and closing of the cover, which solves the problem of difficulty in controlling the amount of glue used and the complicated process and poor consistency when closing the cover.

[0057] In some embodiments, as Figure 3 and Figure 4 As shown, the aforementioned second stress-breaking groove 21 can be a flat groove to facilitate processing.

[0058] In some embodiments, as Figure 3 and Figure 4 As shown, the number of the aforementioned second stress blocking grooves 21 can be more than two, and they are evenly arranged around the circumference of the plastic-sealed end cover 2, so as to further ensure that the circumferential tangential extrusion stress of the interference fit between the plastic-sealed end cover 2 and the plastic-sealed stator 3 during assembly is effectively released.

[0059] In some embodiments, as Figure 3 and Figure 4 As shown, the aforementioned plastic sealed end cap 2 may be provided with a second bearing chamber 22, and a second vent groove 222 is provided on the inner wall of the second bearing chamber 22. The second bearing chamber 22 has an opening A 203 on the inner side of the plastic sealed end cap 2, and the second vent groove 222 runs through the end surface of the opening A 203.

[0060] In the above example, a second vent groove 222 is provided on the inner wall of the second bearing chamber 22, extending through the end face of the opening A 203. This second vent groove 222 is a pressure balancing groove that balances the air pressure inside and outside the second bearing chamber 22. This allows space for the air in the second bearing chamber 22 to flow during motor assembly, thus preventing the second bearing chamber 22 from bulging or cracking, or preventing the rotor from becoming stuck and rotating unsmoothly due to poor air circulation. Furthermore, the design of the second vent groove 222 can also effectively resolve the issue of material shortages in the second bearing chamber 22 during injection molding of the plastic-sealed end cap 2 due to unbalanced air pressure inside and outside the second bearing chamber 22.

[0061] In some embodiments, as Figure 3 and Figure 4 As shown, the second vent groove 222 can be a semi-cylindrical groove, and the center line of the second vent groove 222 is parallel to the center line of the second bearing chamber 22. The second vent groove 222 extends from one axial end to the other end of the inner wall of the second bearing chamber 22, so that the second vent groove 222 and the inner wall of the second bearing chamber 22 are at the same height.

[0062] In some embodiments, as Figure 3 As shown, the number of the second ventilation grooves 222 may be more than two, and they are evenly arranged along the circumference of the second bearing chamber 22 .

[0063] like Figure 5 As shown, the present invention further provides a plastic-encapsulated motor, which may include any of the above-mentioned plastic-encapsulated stators 3 and / or any of the above-mentioned plastic-encapsulated end caps 2. The plastic-encapsulated motor adopts the above-mentioned plastic-encapsulated stator 3 or plastic-encapsulated end caps 2, thereby ensuring that the circumferential tangential extrusion stress of the interference fit between the plastic-encapsulated end caps 2 and the plastic-encapsulated stator 3 during assembly is effectively released, and is conducive to adjusting the deformation caused by the ambient temperature after the plastic-encapsulated stator 3 and the plastic-encapsulated end caps 2 are combined. This solves the problem of the plastic-encapsulated end caps 2 becoming loose and the problem of the plastic-encapsulated stator 3 cracking after the plastic-encapsulated end caps 2 and the plastic-encapsulated stator 3 are combined. Furthermore, the fully plastic-encapsulated motor containing this novel plastic-encapsulated end cap 2 does not require the use of a glue-dispensing process during final assembly.

[0064] It should be noted here that the above-mentioned plastic-encapsulated motor may be a fully plastic-encapsulated motor.

[0065] Among them, when the above-mentioned plastic-encapsulated motor adopts the above-mentioned plastic-encapsulated end cover 2, since the above-mentioned plastic-encapsulated end cover 2 is used to replace the conventional iron shell end cover, the use of the insulating ring on the control board can be eliminated, and the safety hazard of insufficient electrical gap and voltage breakdown between the control board components and the original iron shell end cover can be avoided. It can also greatly enhance the ultimate voltage bearing capacity between the motor control board and the plastic-encapsulated end cover 2, and can effectively save the internal space of the plastic-encapsulated motor, reduce the overall height of the plastic-encapsulated motor, and make the plastic-encapsulated motor smaller and more material-saving.

[0066] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The above description is only a preferred embodiment of the present invention. 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 invention. Such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A plastic-encapsulated stator, characterized in that: It comprises a plastic-sealed shell (30), one end of which is provided with an opening (300) for being covered by a plastic-sealed end cover (2); the opening (300) is provided with an inner peripheral wall (31) for interference fit with the plastic-sealed end cover (2); Wherein, a first stress blocking groove (311) is provided on the inner peripheral wall (31).

2. The plastic-encapsulated stator according to claim 1, characterized in that: The opening (300) has a first hole section (301) and a flared slot section (302) arranged at one end of the first hole section (301) along the axial direction of the plastic-sealed stator (3), and the flared slot section (302) is located away from the other end (303) of the plastic-sealed housing relative to the first hole section (301); The bottom surface (3021) of the expanded slot section is used to provide support for the annular cover edge (20) of the plastic-sealed end cover (2), and at least a portion of the hole wall of the first hole section (301) constitutes the inner peripheral wall (31); the first stress-breaking groove (311) extends from the bottom surface (3021) of the expanded slot section on the hole wall of the first hole section (301) along the axial direction of the plastic-sealed stator (3).

3. The plastic-encapsulated stator according to claim 2, characterized in that: The first stress-blocking groove (311) is a semi-cylindrical groove, and the center line of the semi-cylindrical groove is parallel to the axis of the plastic-sealed stator (3).

4. The plastic-encapsulated stator according to any one of claims 1 to 3, characterized in that: The interior of the plastic-sealed housing (30) comprises a rotor installation cavity (304) and a first bearing chamber (32), wherein the rotor installation cavity (304) is used to install a rotor sleeved on the rotating shaft (1), and the first bearing chamber (32) is used to install a bearing that provides support for the rotating shaft (1); A first ventilation groove (322) is provided on the inner wall of the first bearing chamber (32), and the first ventilation groove (322) connects the first bearing chamber (32) and the rotor installation cavity (304).

5. The plastic-encapsulated stator according to any one of claims 1 to 3, characterized in that: The plastic-encapsulated housing (30) is provided with two or more groups of load mounting holes (42), wherein the plastic-encapsulated stator (3) can be mounted on different loads through different groups of load mounting holes (42).

6. The plastic-encapsulated stator according to claim 5, characterized in that: The number of load mounting holes (42) in each load mounting hole group is equal and corresponds one to one; the corresponding load mounting holes (42) share the same vibration damping pad (4), and each vibration damping pad (4) is provided with a bolt through hole (401) communicating with the corresponding load mounting hole (42).

7. A plastic-sealed end cap, characterized in that: The plastic-sealed end cover (2) has a plug-in portion (201), the plastic-sealed end cover (2) is used to be inserted into the opening (300) of the plastic-sealed stator through the plug-in portion (201), and the plug-in portion (201) has an outer peripheral wall (202) for interference fit with the inner wall of the opening (300); Wherein, a second stress blocking groove (21) is provided on the outer peripheral wall (202).

8. The plastic-sealed end cap according to claim 7, wherein: The second stress-blocking groove (21) is a flat groove; And / or, the number of the second stress-blocking grooves (21) is more than two, and they are evenly arranged around the circumference of the plastic-sealed end cover (2).

9. The plastic-sealed end cap according to claim 7 or 8, characterized in that: The plastic-sealed end cover (2) is provided with a second bearing chamber (22), and a second ventilation groove (222) is provided on the inner wall of the second bearing chamber (22); the second bearing chamber (22) has an opening A (203) on the inner side of the plastic-sealed end cover (2), and the second ventilation groove (222) runs through the end surface of the opening A (203).

10. A plastic-encapsulated motor, characterized in that: The invention comprises the plastic-sealed stator (3) according to any one of claims 1 to 6 and / or the plastic-sealed end cover (2) according to any one of claims 7 to 9.

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