stator assembly

Abstract

The utility model provides a kind of stator assembly, including stator package part, stator package part includes box body part, first pin package part and first connector part, at least part box body part from the first outer wall of stator assembly extends to the outside direction of stator assembly and forms first opening, cover plate is laser welded with box body part and seals first opening, first pin package part is set from the outside wall of box body part and extends to the outside direction of box body part, first connector part is away from the side of box body part and extends to the outside direction of stator assembly and forms second opening, the clearance of the bottom wall of first connector part and the top wall of cover plate is arranged, define the minimum value X between the bottom wall of first connector part and the bottom wall of cover plate, X is 2mm, it is favorable to reduce the problem that interface part occurs damage in the process of laser welding of box body part and cover plate.

Description

Technical Field

[0001] This application relates to electric valve technology, specifically to a stator assembly. Background Technology

[0002] The stator assembly is an important component of the electric valve, including the stator housing. The housing body and the cover plate of the stator housing are laser welded together to seal the circuit board of the stator assembly. The interface of the stator housing is located close to the housing body and the cover plate, which leads to the problem of damage to the interface when the housing body and the cover plate are laser welded. Utility Model Content

[0003] The purpose of this application is to provide a stator assembly that helps reduce the problem of damage to the interface.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] This application provides a stator assembly, including a stator encapsulation portion. The stator encapsulation portion includes a housing portion, a first pin encapsulation portion, and a first insertion portion. At least a portion of the housing portion extends from the first outer peripheral wall of the stator assembly toward the outside of the stator assembly and forms a first opening. A cover plate is laser-welded to the housing portion and seals the first opening. The first pin encapsulation portion extends from the outer peripheral wall of the housing portion toward the outside of the housing portion. The first insertion portion extends from the side of the first pin encapsulation portion away from the housing portion toward the outside of the stator assembly and forms a second opening. A gap is provided between the bottom wall of the first insertion portion and the top wall of the cover plate. The minimum value of the gap between the bottom wall of the first insertion portion and the top wall of the cover plate is defined as X, where X ≥ 2 mm.

[0006] In the stator assembly provided in this application, the gap between the bottom wall of the first connector and the top wall of the cover plate is defined as X, where X≥2mm. When the housing part and the cover plate are laser welded, the first connector is less affected by the heat of laser welding, which helps to reduce the problem of damage to the interface. Attached Figure Description

[0007] Figure 1 A three-dimensional structural schematic diagram of the stator assembly provided in the embodiments of this application;

[0008] Figure 2 for Figure 1 A cross-sectional structural diagram of the middle stator assembly;

[0009] Figure 3 for Figure 2 A magnified view of a portion of the structure at point "A" in the diagram;

[0010] Figure 4 for Figure 1 Another cross-sectional view of the middle stator assembly;

[0011] Figure 5 for Figure 1 An exploded view of the middle stator assembly;

[0012] Figure 6 for Figure 5 A three-dimensional structural diagram of the middle cover plate;

[0013] Figure 7 for Figure 5 A three-dimensional structural diagram of the middle stator encapsulation section;

[0014] Figure 8 for Figure 5 Another three-dimensional structural diagram of the middle stator encapsulation section;

[0015] Figure 9 A cross-sectional structural diagram of an electric valve provided in an embodiment of this application;

[0016] In the diagram: 10-Electric valve, 100-Stator assembly, 200-Valve assembly, 300-Connector, 110-Stator encapsulation, 120-Cover plate, 130-Circuit board assembly, 140-External pin, 150-Coil assembly, 160-Second pin encapsulation, 170-Hall effect assembly, 111-Carrier body, 112-First pin encapsulation, 113-First connector, 1121-Recess. 1122 - First rib, 116 - Rotor receiving part, 117 - Box bottom, 118 - Second rib, 1191 - First outer peripheral wall, 1192 - First upper end wall, 1193 - Rotor receiving cavity, 1111 - First annular part, 1112 - Second outer end wall, 1113 - Second top wall, 1114 - Box cavity, 1111a - First opening, 1111b - Third outer end wall, 1131 - Interface cavity, 1132- Second opening, 1133- First bottom wall, 1121a- Recessed groove, 1121b- Third opening, 1122a- First outer end wall, 1161- Second outer peripheral wall, 121- Base, 122- Second annular portion, 123- Third annular portion, 124- Annular groove, 1211- First inner end wall, 1221- First top wall, 131- Substrate, 132- Component, 141- Connecting section, 142- Middle section, 143- Outer section, X- Minimum distance between the outer peripheral wall of the first insertion part and the inner wall forming the first opening, Y- Minimum height of the recessed groove, 210- Magnetic rotor, 220- Sleeve, 230- Lead screw, 240- Nut, 250- Valve needle assembly, 260- Valve seat assembly, 261- Valve port, 310- Conductive part, 320- Second insertion part. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments are described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0018] The following is combined Figures 1 to 9 The stator assembly 100 provided in this application embodiment will be described in detail below. Such a stator assembly 100 includes a stator encapsulation portion 110, a cover plate 120, a circuit board assembly 130, an external pin 140, a coil assembly 150, a second pin encapsulation portion 160, and a Hall effect assembly 170.

[0019] like Figure 2 In the embodiment shown, the stator encapsulation portion 110 includes a housing portion 111, a first pin encapsulation portion 112, and a first insertion portion 113. The outer peripheral wall of the stator assembly 100 is defined by a first outer peripheral wall 1191. A portion of the housing portion 111 extends from the first outer peripheral wall 1191 toward the outside of the stator assembly 100 and forms a first opening 1111a. The cover plate 120 is laser welded to the housing portion 111 and seals the first opening 1111a, so that the first outer peripheral wall 1191 can serve as part of the bottom of the housing portion 111, eliminating the need to provide an additional bottom for the housing portion 111. This simplifies the structure of the housing portion 111 and helps to meet the design requirements for miniaturization of the stator assembly 100. The first pin encapsulation portion 112 extends from the outer side wall of the housing portion 111 toward the outer side of the housing portion 111. The first insertion portion 113 extends from the side of the first pin encapsulation portion 112 away from the housing portion 111 toward the outer side of the stator assembly 100 and forms a second opening 1132. The first opening 1111a and the second opening 1132 face the same side of the stator assembly 100. The bottom wall of the first insertion portion 113 is defined as the first bottom wall 1133, and the top wall of the cover plate 120 is defined as the first top wall 1221. The first bottom wall 1133 and the first top wall 1221 are spaced apart, so that the structure of the housing portion 111 and the first insertion portion 113 can be relatively compactly arranged on the same side of the stator assembly 100, which is beneficial to meeting the design requirements for miniaturization of the stator assembly 100. The gap between the first bottom wall 1133 and the first top wall 1221 is defined as the first gap, and the first gap is X, where X ≥ 2mm. This first gap ensures that the distance between the cover plate 120 and the first insertion part 113 is not less than 2mm. During the laser welding process between the housing part 111 and the cover plate 120 to seal the first opening 1111a, the first insertion part 113 is less affected by the heat of laser welding, which helps reduce the risk of damage to the first insertion part 113 and thus improves the processing quality of the stator assembly 100. It should be noted that damage to the first insertion part 113 can be caused by ablation due to laser scattering. Figure 2In the embodiment shown, the minimum distance between the outer peripheral wall of the first connector 113 and the inner wall before forming the first opening 1111a is defined as Y, where Y ≥ 4 mm. During the laser welding of the housing 111 and the cover plate 120 and sealing of the first opening 1111a, the cover plate 120 and the housing 111 can be laser welded at the first opening 1111a. With Y ≥ 4 mm, the heat effect of laser welding on the first connector 113 is relatively small, which helps to reduce the problem of ablation of the first connector 113 and thus helps to improve the processing quality of the stator assembly 100.

[0020] In this embodiment, X is preferably 3.8 mm and Y is preferably 6 mm.

[0021] like Figure 2 In the embodiment shown, the first pin encapsulation portion 112 includes a groove portion 1121, and the top wall of the housing portion 111 is defined as the second top wall 1113. At least a portion of the groove portion 1121 is located between the first bottom wall 1133 and the second top wall 1113. The groove portion 1121 has a recessed groove 1121a. The height direction of the recessed groove 1121a is parallel to the axial direction of the stator assembly 100. The minimum height of the recessed groove 1121a is defined to be greater than or equal to 2mm. The height of the groove portion 1121a is basically consistent with the first gap. The recessed groove 1121a makes the distance between the first bottom wall 1133 and the first top wall 1221 not less than 2mm. This setting can reduce the thermal impact of the housing portion 111 on the first connector portion 113, thereby improving the processing quality of the stator assembly 100.

[0022] like Figure 2 In the embodiment shown, the groove portion 1121 has a third opening 1121b, which communicates with the recessed groove 1121a. The third opening 1121b, the first opening 1111a, and the second opening 1132 face the same side of the stator assembly 100. This arrangement allows the recessed groove 1121a, the housing cavity 1114, and the interface cavity 1131 to be simultaneously machined on the stator encapsulation portion 110.

[0023] like Figure 2 , Figure 3 and Figure 8In the embodiment shown, the first pin encapsulation portion 112 includes a first rib 1122. The outer end wall of the first rib 1122 includes a first outer end wall 1122a near the first opening 1111a and the second opening 1132. The third opening 1121b is located on the first outer end wall 1122a. The first rib 1122 extends from the first bottom wall 1133 to the second top wall 1113. The arrangement of the first rib 1122 is beneficial to improving the structural strength of the first insertion portion 113 and the housing portion 111. There are at least two first ribs 1122 and at least two groove portions 1121. The at least two groove portions 1121 and at least two first ribs 1122 are alternately arranged in the circumferential direction of the interface portion.

[0024] The first bottom wall 1133 and the second top wall 1113 are spaced apart, and the distance between the first bottom wall 1133 and the second top wall 1113 is not less than 2mm.

[0025] like Figures 2 to 4 In the embodiment shown, the stator encapsulation portion 110 includes a rotor receiving portion 116, and the stator assembly 100 includes a rotor receiving cavity 1193. The rotor receiving cavity 1193 can be used to house the magnetic rotor 210 of the electric valve 10. A portion of the rotor receiving cavity 1193 is formed in the rotor receiving portion 116. The rotor receiving portion 116 protrudes from the first upper end wall 1192 of the stator encapsulation portion 110. The outer peripheral wall of the rotor receiving portion 116 is defined as the second outer peripheral wall 1161. The outer diameter is smaller than the outer diameter of the first outer peripheral wall 1191. The first upper end wall 1192 extends outward from the second outer peripheral wall 1161 to the first outer peripheral wall 1191. The first upper end wall 1192 is located between the first outer peripheral wall 1191 and the second outer peripheral wall 1161. A portion of the box body 111 extends from the second outer peripheral wall 1161 of the rotor receiving portion 116 toward the outside of the stator assembly 100. With this arrangement, the second outer peripheral wall 1161 of the rotor receiving portion 116 can serve as part of the bottom of the box body 111.

[0026] like Figures 2 to 4 In the embodiment shown, the stator encapsulation portion 110 includes a box bottom 117, which protrudes from the first upper end wall 1192 and is located on the radial side of the rotor receiving portion 116. The first outer peripheral wall 1191, the second outer peripheral wall 1161, and the box bottom 117 extend outward toward the stator assembly 100. In this configuration, the first outer peripheral wall 1191, the second outer peripheral wall 1161, and the box bottom 117 constitute the box bottom of the box body portion 111.

[0027] like Figure 4 and Figure 5In the embodiment shown, the Hall component 170 is electrically connected to the circuit board assembly 130. The Hall component 170 is located in the housing cavity 1114, and the bottom of the housing 117 is located at one end of the Hall component 170, so that the Hall component 170 is positioned close to the rotor receiving portion 116, so that the Hall component 170 can better sense the magnetic field changes of the magnetic rotor 210.

[0028] In some embodiments, the entire housing portion 111 may extend from the first outer peripheral wall 1191 toward the outside of the stator assembly 100, and the first outer peripheral wall 1191 of the stator assembly 100 may serve as the bottom of the housing portion 111.

[0029] In some embodiments, the entire housing portion 111 may extend from the first outer peripheral wall 1191 and the second outer peripheral wall 1161 toward the outside of the stator assembly 100, and the first outer peripheral wall 1191 and the second outer peripheral wall 1161 may serve as the bottom of the housing portion 111.

[0030] like Figure 7 In the embodiment shown, the first pin encapsulation portion 112 and the rotor receiving portion 116 are spaced apart. The stator assembly 100 includes a second rib portion 118, which extends from the first pin encapsulation portion 112 to the rotor receiving portion 116. The second rib portion 118 connects the first pin encapsulation portion 112 and the rotor receiving portion 116 into a whole, thereby improving the structural strength of the first pin encapsulation portion 112 and the rotor receiving portion 116.

[0031] like Figure 2 In the embodiment shown, a first direction is defined, which points to the vertical direction of the stator assembly 100. The first direction is perpendicular to the axial direction of the stator assembly 100 and perpendicular to the extension direction of the first pin encapsulation portion 112. The first direction is parallel to the extension direction of the housing portion 111 and the extension direction of the first connector portion 113. The first pin encapsulation portion 112 extends upward from the first top wall 1221 above the housing portion 111, and the first connector portion 113 extends outward from the side above the first pin encapsulation portion 112. A first gap is formed between the first top wall 1221 above the housing portion 111 and the first bottom wall 1133 below the first connector portion 113.

[0032] In some embodiments, the first top wall 1221 may also be located below the housing 111, the first bottom wall 1133 may be located above the first connector portion 113, the first pin encapsulation portion 112 may also extend downward from the first top wall 1221 below the housing portion 111, the first connector portion 113 may extend outward from the side below the first pin encapsulation portion 112, and the first gap is formed between the first top wall 1221 below the housing portion 111 and the first bottom wall 1133 above the first connector portion 113.

[0033] like Figure 2 , Figure 3 and Figure 6 In the embodiment shown, the box body 111 includes a first annular portion 1111, and the outer end wall of the box body 111 is defined as a second outer end wall 1112. The first annular portion 1111 protrudes from the second outer end wall 1112, and the second outer end wall 1112 is located between the second top wall 1113 and the outer peripheral wall of the first annular portion 1111. The outer end wall of the first annular portion 1111 is defined as a third outer end wall 1111b, and the first opening 1111a is formed in the third... The outer end wall 1111b and the cover plate 120 include a base 121. The inner end wall of the base 121 is defined as the first inner end wall 1211. The first inner end wall 1211 abuts against the third outer end wall 1111b, so that a sealing surface for the first opening 1111a is formed between the first inner end wall 1211 and the third outer end wall 1111b. The base 121 and the first annular portion 1111 are connected by laser welding, thereby sealing the first opening 1111a with the base 121. The material used to make the stator encapsulation portion 110 includes a thermoplastic with relatively low light transmittance, which can be an opaque modified polypropylene. The material used to make the cover plate 120 includes a thermoplastic with relatively high light transmittance, which can be a transparent polypropylene. This allows the laser beam to pass through the base 121 and be absorbed by the first annular portion 1111. The heat generated by the absorption of the laser beam by the first annular portion 1111 causes the first annular portion 1111 and the base 121 to melt and bond together. After the first annular portion 1111 and the base 121 are solidified, they form a whole.

[0034] like Figure 2 , Figure 3 and Figure 6In the embodiment shown, the cover plate 120 includes a second annular portion 122, the top wall of which is the first top wall 1221. The second annular portion 122 protrudes from the first inner end wall 1211. The outer peripheral wall of the first insertion portion 113 includes a first side wall located below the first insertion portion 113. The outer peripheral wall of the second annular portion 122 includes a second side wall located above the cover plate 120. The plane containing the first side wall and the plane containing the second side wall are parallel and form a first gap between them. The second annular portion 122 is located on the outer peripheral wall of the first annular portion 1111. The second annular portion 122 makes the first annular portion 1111 and the first insertion portion 113 spaced apart, which can help reduce the overflow of the molten first annular portion 1111 and further reduce the thermal impact of laser welding on the first insertion portion 113. Furthermore, the second annular portion 122 can abut against the second outer end wall 1112, so that a sealing surface for the first opening 1111a can also be formed between the second annular portion 122 and the second outer end wall 1112. In other words, multiple sealing surfaces are formed between the cover plate 120 and the box portion 111. This arrangement is beneficial to improving the sealing effect of the first opening 1111a.

[0035] like Figure 2 , Figure 3 and Figure 6 In the embodiment shown, the cover plate 120 includes a third annular portion 123, which protrudes from the first inner end wall 1211. A portion of the third annular portion 123 is located at the first opening 1111a, so that the third annular portion 123 and the first annular portion 1111 can also form a sealing surface for the first opening 1111a. Moreover, an annular groove 124 is formed between the second annular portion 122 and the third annular portion 123, and the first annular portion 1111 is located in the annular groove 124. This arrangement helps to reduce the problem of the molten first annular portion 1111 overflowing inward.

[0036] As shown in the figure, in this embodiment, the circuit board assembly 130 includes components 132 and a substrate 131. The projection of the components 132 along the thickness direction of the substrate 131 and the projection of the connecting segment 141 along its own length direction are both located within the third annular portion 123. This arrangement helps to reduce the problem of the molten first annular portion 1111 overflowing inward to the components 132 and the connecting segment 141.

[0037] like Figures 2 to 4In the embodiment shown, the external connector 140 includes a connecting section 141, a middle section 142, and an external section 143. The connecting section 141, the middle section 142, and the external section 143 are an integral structure. The middle section 142 is located between the connecting section 141 and the external section 143. The connecting section 141 is electrically connected to the circuit board assembly 130 and is located in the housing cavity 1114 of the housing portion 111. The housing cavity 1114 communicates with the first opening 1111a. A portion of the first outer peripheral wall 1191 is located in the housing cavity 1114. The first connector encapsulation portion... The middle section 142 is covered by 112. The external pin 140 is located in the interface cavity 1131 of the first connector 113. The interface cavity 1131 communicates with the second opening 1132. Part of the side wall of the first pin enclosure 112 is located in the interface cavity 1131. This arrangement allows the circuit board assembly 130 located in the housing cavity 1114 to be connected through the connecting section 141, the middle section 142, and the external section 143. The connection between the circuit board assembly 130 and the external pin 140 includes at least one of electrical connection and communication connection.

[0038] In this embodiment, a portion of the connecting segment 141 is located within a metal via of the circuit board assembly 130. The connecting segment 141 is soldered to the inner metal wall forming the metal via, thereby achieving an electrical connection between the connecting segment 141 and the circuit board assembly 130. In some embodiments, the connecting segment 141 is capable of elastic deformation. The connecting segment 141 is pressed and fixed to the inner metal wall forming the metal via, and the connecting segment 141 is in an elastic deformation state, thereby achieving an electrical connection between the connecting segment 141 and the circuit board assembly 130.

[0039] In this embodiment, the length direction of the connecting segment 141 is parallel to the orientation of the first opening 1111a, and the projection of the connecting segment 141 along its length direction is located in the first opening 1111a. This arrangement facilitates the electrical connection between the circuit board assembly 130 and the connecting segment 141 in the housing cavity 1114 through the first opening 1111a.

[0040] In this embodiment, the length direction of the outer segment 143 is parallel to the orientation of the second opening 1132, and the projection of the outer segment 143 along its length direction is located in the second opening 1132. This arrangement facilitates the connection of the connector 300 and the outer segment 143 in the interface cavity 1131 through the second opening 1132.

[0041] like Figure 2 In the embodiment shown, the coil assembly 150 is electrically connected to the circuit board assembly 130, the stator encapsulation portion 110 covers the coil assembly 150, and a portion of the housing portion 111 is located on one radial side of the coil assembly 150.

[0042] like Figures 2 to 4In the embodiment shown, there are at least two external pins 140. The second pin encapsulation part 160 is injection molded with at least two external pins 140 as inserts. The stator encapsulation part 110 is injection molded with external pins 140, the first pin encapsulation part 112 and the coil assembly 150 as inserts. This arrangement is beneficial to improving the relative position accuracy of at least two external pins 140.

[0043] The following is combined Figure 9 This application provides a detailed description of the electric valve 10 provided in the embodiments of this application. Such an electric valve 10 includes a valve assembly 200, a connector 300, and the stator assembly 100 described in this embodiment. This electric valve 10 can be applied to automotive, residential, or commercial air conditioning cooling systems, as well as automotive battery cooling systems or battery cooling systems in other fields. In these various types of cooling systems, the electric valve 10 generally functions as a throttling element, a switching element, or a combination of both. This application describes the electric valve 10 as a throttling element. The connector 300 can be connected to the wiring harness of a thermal management system.

[0044] like Figure 9 In the embodiment shown, a portion of the valve assembly 200 is located in the rotor receiving cavity 1193. The valve assembly 200 includes a sleeve 220 and a magnetic rotor 210, with the magnetic rotor 210 located inside the sleeve 220, which is located in the rotor receiving cavity 1193.

[0045] like Figure 9 In the embodiment shown, the valve assembly 200 includes a lead screw 230, a nut 240, a valve needle assembly 250, and a valve seat assembly 260. The lead screw 230 is in a limiting engagement with the magnetic rotor 210 and the valve needle assembly 250, and the nut 240 is in a limiting engagement with the valve seat assembly 260. The lead screw 230 and the nut 240 are threadedly engaged. The magnetic rotor 210 and the nut 240 can rotate relative to the valve seat assembly 2601, causing the valve needle assembly 250 to rise or fall relative to the valve port 261 of the valve seat assembly 260, thereby adjusting the flow area of ​​the valve port 261, which is beneficial for the electric valve 10 to throttle and expand the fluid.

[0046] like Figure 9 In the embodiment shown, the connector 300 is positioned and engaged with the stator assembly 100. The connector 300 includes a second insertion portion 320 and a conductive portion 310. The conductive portion 310 is located inside the second insertion portion 320 and abuts against the outer segment 143 for electrical connection. The second insertion portion 320 is positioned and engaged with the first insertion portion 113. The second insertion portion 320 is located on the outer peripheral wall of the first insertion portion 113, and a portion of the second insertion portion 320 may be located in the first gap.

[0047] The above-described embodiments are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications without departing from the concept of this utility model, and these modifications all fall within the protection scope of this utility model.

Claims

1. A stator assembly, characterized in that, The stator assembly includes a stator enclosure (110) and a cover plate (120). The stator enclosure (110) includes a housing (111), a first pin enclosure (112), and a first insertion portion (113). At least a portion of the housing (111) extends from the first outer peripheral wall (1191) of the stator assembly (100) toward the outside of the stator assembly (100) and forms a first opening (1111a). The cover plate (120) is laser welded to the housing (111) and seals the first opening (1111a). At least a portion of the first pin enclosure (1111) is also sealed. 2) The first connector (113) extends from the outer side wall of the housing part (111) toward the outer side of the housing part (111), and at least part of the first connector (113) extends from the side of the first pin encapsulation part (112) away from the housing part (111) toward the outer side of the stator assembly (100) and forms a second opening (1132). The bottom wall of the first connector (113) is separated from the top wall of the cover plate (120). The minimum value of the gap between the bottom wall of the first connector (113) and the top wall of the cover plate (120) is defined as X, where X ≥ 2 mm.

2. The stator assembly according to claim 1, characterized in that, The first pin encapsulation portion (112) includes a groove portion (1121), and at least a portion of the recessed groove (1121a) of the groove portion (1121) is located between the bottom wall of the first insertion portion (113) and the top wall of the box portion (111).

3. The stator assembly according to claim 2, characterized in that, The groove (1121) has a third opening (1121b), the recessed groove (1121a) communicates with the third opening (1121b), and the third opening (1121b) faces the same side of the stator assembly (100) as the first opening (1111a) and the second opening (1132).

4. The stator assembly according to claim 3, characterized in that, The first insert encapsulation portion (112) includes a first rib portion (1122), and the third opening (1121b) is located on the first outer end wall (1122a) of the first rib portion (1122). The first rib portion (1122) extends from the first insertion portion (113) to the box portion (111).

5. The stator assembly according to any one of claims 1 to 4, characterized in that, The stator encapsulation portion (110) includes a rotor receiving portion (116), which protrudes from the first upper end wall (1192) of the stator encapsulation portion (110). The first upper end wall (1192) is located between the first outer peripheral wall (1191) and the outer peripheral wall of the rotor receiving portion (116). A portion of the housing portion (111) extends from the outer peripheral wall of the rotor receiving portion (116) toward the outside of the stator assembly (100). At least a portion of the first pin encapsulation portion (112) is located on the radial side of the rotor receiving portion (116).

6. The stator assembly according to claim 5, characterized in that, The stator encapsulation portion (110) includes a box bottom (117), which protrudes from the first upper end wall (1192). The box bottom (117) is located on the radial side of the rotor receiving portion (116). The box body portion (111) extends from the first outer peripheral wall (1191), the outer peripheral wall of the rotor receiving portion (116), and the box bottom (117) toward the outside of the stator assembly (100).

7. The stator assembly according to any one of claims 1 to 4, 6, characterized in that, The box body (111) includes a first annular portion (1111), which protrudes from the second outer end wall (1112) of the box body (111). The first opening (1111a) is formed on the second outer end wall (1112). The cover plate (120) includes a base (121), the first inner end wall (1211) of the base (121) abuts against the second outer end wall (1112) and is connected by laser welding.

8. The stator assembly according to claim 7, characterized in that, The cover plate (120) includes a second annular portion (122), which protrudes from the first inner end wall (1211). The second annular portion (122) is located on the outer peripheral wall of the first annular portion (1111), and the second annular portion (122) can abut against the second outer end wall (1112).

9. The stator assembly according to claim 5, characterized in that, The box body (111) includes a first annular portion (1111), which protrudes from the second outer end wall (1112) of the box body (111). The first opening (1111a) is formed on the second outer end wall (1112). The cover plate (120) includes a base (121), the first inner end wall (1211) of the base (121) abuts against the second outer end wall (1112) and is connected by laser welding.

10. The stator assembly according to claim 9, characterized in that, The cover plate (120) includes a second annular portion (122), which protrudes from the first inner end wall (1211). The second annular portion (122) is located on the outer peripheral wall of the first annular portion (1111), and the second annular portion (122) can abut against the second outer end wall (1112).

11. The stator assembly according to claim 5, characterized in that, The cover plate (120) includes a third annular portion (123) which protrudes from the inner end wall of the cover plate (120), and a portion of the third annular portion (123) is located in the first opening (1111a).

12. The stator assembly according to claim 7, characterized in that, The cover plate (120) includes a third annular portion (123) which protrudes from the inner end wall of the cover plate (120), and a portion of the third annular portion (123) is located in the first opening (1111a).

13. The stator assembly according to any one of claims 1 to 4, 6, 8 to 10, characterized in that, The cover plate (120) includes a third annular portion (123) which protrudes from the inner end wall of the cover plate (120), and a portion of the third annular portion (123) is located in the first opening (1111a).

14. The stator assembly according to claim 5, characterized in that, The stator assembly (100) includes a circuit board assembly (130) and an external pin (140). The external pin (140) includes a connecting section (141), an intermediate section (142), and an external section (143). The intermediate section (142) is located between the connecting section (141) and the external section (143). The connecting section (141) is electrically connected to the circuit board assembly (130) and located in the housing cavity (1114) of the housing part (111). The housing cavity (1114) communicates with the first opening (1111a). The first pin encapsulation part (112) covers the intermediate section (142). The external section (143) is located in the interface cavity (1131) of the first connector part (113). The interface cavity (1131) communicates with the second opening (1132).

15. The stator assembly according to claim 7, characterized in that, The stator assembly (100) includes a circuit board assembly (130) and an external pin (140). The external pin (140) includes a connecting section (141), an intermediate section (142), and an external section (143). The intermediate section (142) is located between the connecting section (141) and the external section (143). The connecting section (141) is electrically connected to the circuit board assembly (130) and located in the housing cavity (1114) of the housing part (111). The housing cavity (1114) communicates with the first opening (1111a). The first pin encapsulation part (112) covers the intermediate section (142). The external section (143) is located in the interface cavity (1131) of the first connector part (113). The interface cavity (1131) communicates with the second opening (1132).

16. The stator assembly according to claim 13, characterized in that, The stator assembly (100) includes a circuit board assembly (130) and an external pin (140). The external pin (140) includes a connecting section (141), an intermediate section (142), and an external section (143). The intermediate section (142) is located between the connecting section (141) and the external section (143). The connecting section (141) is electrically connected to the circuit board assembly (130) and located in the housing cavity (1114) of the housing part (111). The housing cavity (1114) communicates with the first opening (1111a). The first pin encapsulation part (112) covers the intermediate section (142). The external section (143) is located in the interface cavity (1131) of the first connector part (113). The interface cavity (1131) communicates with the second opening (1132).

17. The stator assembly according to any one of claims 1 to 4, 6, 8 to 12, characterized in that, The stator assembly (100) includes a circuit board assembly (130) and an external pin (140). The external pin (140) includes a connecting section (141), an intermediate section (142), and an external section (143). The intermediate section (142) is located between the connecting section (141) and the external section (143). The connecting section (141) is electrically connected to the circuit board assembly (130) and located in the housing cavity (1114) of the housing part (111). The housing cavity (1114) communicates with the first opening (1111a). The first pin encapsulation part (112) covers the intermediate section (142). The external section (143) is located in the interface cavity (1131) of the first connector part (113). The interface cavity (1131) communicates with the second opening (1132).

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