Plastic package motor and air conditioner

Abstract

The invention provides a plastic package motor and an air conditioner, the plastic package motor comprises a plastic package stator and a first metal end cover blocking one side of the plastic package stator, the plastic package stator is provided with a stator iron core, and a blind hole extending along the stack thickness direction of the stator iron core is formed in the end face of one side, facing the first metal end cover, of the stator iron core. The plastic package motor further comprises a metal conductive strip, the first end of the metal conductive strip is inserted and positioned in the blind hole, and in the state that the first metal end cover is assembled on the plastic package stator, the two ends of the metal conductive strip are clamped between the hole bottom wall of the blind hole and the inner side wall face of the first metal end cover. According to the invention, the assembly of the metal conductive strip in the plastic package motor is very simple and convenient, the production efficiency of the plastic package motor can be improved, and the reliable fixation of the metal conductive strip can be ensured.

Description

Technical Field

[0001] This invention belongs to the field of motor design technology, specifically relating to a plastic-encapsulated motor and an air conditioner. Background Technology

[0002] Currently, encapsulated motors suffer from bearing electro-corrosion due to shaft voltage, leading to bearing damage, motor noise, and other problems. Motors on the market currently employ various technologies to suppress bearing electro-corrosion. Existing technologies for preventing electro-corrosion in motors generally include the following methods: (1) using insulated bearings (ceramic bearings); (2) using conductive tape directly adhered to the motor surface to make the upper and lower end covers of the motor conductive; (3) using wires, metal conductive plates, etc., to connect the upper and lower end covers of the motor.

[0003] Of the two aforementioned methods for preventing electro-corrosion, the drawbacks of insulated bearings and conductive tapes are their high cost and low production efficiency. Therefore, most of the market uses metal conductive plates to achieve electro-corrosion prevention. However, the current structure of this type of plate is not very stable and the connection is unreliable. In order to improve the connection reliability of the metal conductive plates and thus ensure the reliable and stable effect of electro-corrosion prevention, the existing technology often uses corresponding fasteners (such as screws) at both ends of the metal conductive plates for reinforcement. This method is not convenient for motor assembly and reduces the production efficiency of encapsulated motors. Summary of the Invention

[0004] Therefore, the present invention provides a molded motor and an air conditioner that overcomes the shortcomings of related technologies, where molded motors require fasteners at both ends of the metal conductive sheet for reinforcement to ensure the connection reliability and stability of the anti-electro-corrosion effect, which is inconvenient for motor assembly and reduces the production efficiency of molded motors.

[0005] To address the aforementioned problems, the present invention provides a plastic-encapsulated motor, comprising a plastic-encapsulated stator and a first metal end cap sealing one side of the plastic-encapsulated stator. The plastic-encapsulated stator has a stator core, and a blind hole extending along its thickness direction is formed on the end face of the stator core facing the first metal end cap. The plastic-encapsulated motor further includes a metal conductive strip, the first end of which is inserted and positioned within the blind hole. When the first metal end cap is mounted on the plastic-encapsulated stator, both ends of the metal conductive strip are clamped between the bottom wall of the blind hole and the inner wall of the first metal end cap.

[0006] In some embodiments, the blind hole includes a first hole segment and a second hole segment arranged sequentially along the depth direction of the blind hole. The hole wall of the second hole segment protrudes beyond the hole wall of the first hole segment. The metal conductive strip includes a top rod and two Y-shaped support arms connected to the first end of the top rod. The two support arms have a first state and a second state. In the first state, the maximum distance between the two support arms is not greater than the minimum passage distance of the first hole segment. In the second state, the minimum distance between the two support arms is greater than the minimum passage distance of the first hole segment. During the process of assembling the first metal end cap onto the plastic-sealed stator, the two support arms switch from the first state to the second state under the clamping action of the first metal end cap and the bottom wall of the blind hole.

[0007] In some embodiments, when the metal conductive strip is in a free state, the length of the metal conductive strip is H, the length of the support arm in the length direction of the top rod is h, and when the first metal end cap is assembled on the plastic-encapsulated stator, the axial distance between the inner wall area of ​​the first metal end cap in contact with the top rod and the bottom wall of the blind hole is H', where H' < Hh.

[0008] In some embodiments, an insulating frame is assembled on the side end face of the stator core near the first metal end cover, and a first through hole is provided on the insulating frame in the area corresponding to the position of the blind hole, and the metal conductive strip passes through the first through hole in the first state.

[0009] In some embodiments, a motor drive plate is assembled on the inner wall of the first metal end cap, and a second through hole is provided in the area corresponding to the opening position of the blind hole on the motor drive plate. The diameter of the second through hole is equal to the outer diameter of the second end of the top rod.

[0010] In some embodiments, the outer periphery of the inner wall of the first metal end cap is formed with an assembly ring groove recessed along the side away from the plastic-encapsulated stator. The assembly ring groove is fastened to the end face protrusion of the plastic-encapsulated stator, and the second end of the push rod is embedded in the assembly ring groove.

[0011] In some embodiments, the radially outer groove wall of the assembly ring groove and the radially outer ring wall of the end face convex ring are interference-fitted. When the first metal end cap is assembled on the plastic-encapsulated stator, the second end of the push rod is located in the annular gap between the radially inner groove wall of the assembly ring groove and the radially inner ring wall of the end face convex ring, and the radial width of the annular gap is not greater than the thickness of the second end of the push rod in the radial direction of the stator core.

[0012] In some embodiments, the top rod has a wavy section on the side near the support arm.

[0013] In some embodiments, the stator core is formed by stacking three types of laminations sequentially along a direction away from the first metal end cap.

[0014] The present invention also provides an air conditioner including the above-described encapsulated motor.

[0015] The encapsulated motor and air conditioner provided by this invention have the following beneficial effects: By forming blind holes on the end face of the stator core to accommodate and position the first end of the metal conductive strip, and by using the bottom wall of the first metal end cap and the blind hole to clamp both ends of the metal conductive strip after the first metal end cap is assembled on the encapsulated stator, the assembly of the metal conductive strip in the encapsulated motor is very simple and convenient. This reduces the voltage difference between the first metal end cap and the second metal end cap and thus reduces the electro-corrosion of the motor. The joint clamping of the metal conductive strip by the first metal end cap and the bottom wall of the blind hole, as well as the accommodating and positioning of the first end of the metal conductive strip by the blind hole, makes the assembly of the metal conductive strip in the encapsulated motor very simple and convenient. This can improve the production efficiency of the encapsulated motor and ensure reliable fixation of the metal conductive strip. By setting two forked arms at the first end of the top rod, after the two arms enter the second hole section through the first hole section, the first metal end cap applies force to the second end of the top rod, which causes the two arms to flip outward under the obstruction of the bottom wall of the blind hole. This makes the outer diameter of the first end of the metal conductive strip larger than the minimum passage distance of the first hole section, thereby reliably and stably clamping the first end of the metal conductive strip into the second hole section and ensuring the reliable and stable position of the metal conductive strip. By designing H' to be less than Hh, the axial clamping of the metal conductive strip by the first metal end cap and the bottom wall of the blind hole is ensured, thereby further ensuring the positional stability of the metal conductive strip. By setting corresponding first through holes on the insulating frame, the mating length between the metal conductive strip and the plastic-encapsulated stator can be increased to a certain extent. After the metal conductive strip is assembled, it can limit the radial displacement of the top rod to a certain extent, further ensuring the positional reliability of the metal conductive strip. The second through hole and the second end of the top rod form a tight fit between the inner and outer sleeves. This allows the motor drive board to reliably limit the second end of the metal conductive strip, further ensuring the positional reliability of the metal conductive strip. In particular, it can significantly reduce the occurrence of vibration displacement phenomenon generated by the top rod during the operation of the plastic encapsulation motor. The first metal end cap and the encapsulated stator are assembled together with an interference fit, which greatly simplifies the assembly process of the encapsulated motor. After the first metal end cap and the encapsulated stator are assembled with an interference fit, the axial clamping of the metal conductive strip between the end cap and the bottom wall of the blind hole can be realized simultaneously, and the radial clamping of the second end of the metal conductive strip can be formed at the same time. The positional reliability of the metal conductive strip is further improved, and the assembly production efficiency of the encapsulated motor is greatly improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the internal structure of the encapsulated motor in an embodiment of the present invention, in which the two arms of the metal conductive strip are in the second state. Figure 2 yes Figure 1 The image shows the state of the encapsulated motor before the first metal end cap is assembled onto the end face of the encapsulated stator. The two arms of the metal conductive strip in the figure are in the first state. Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a schematic diagram of the internal structure of the encapsulated motor of the present invention in another embodiment. The second end of the metal conductive strip in the figure undergoes elastic bending under the axial pressure of the first metal end cap. Figure 5 yes Figure 4 A schematic diagram of the structure of the metal conductive strip in the diagram; Figure 6 This is a schematic diagram of the assembly state of the metal conductive strip in the first state in an embodiment of the present invention; Figure 7 This is a schematic diagram of the assembly state of the metal conductive strip in the second state in an embodiment of the present invention.

[0018] The attached figures are labeled as follows: 1. Plastic-encapsulated stator; 11. Stator core; 111. Blind hole; 1111. First hole segment; 1112. Second hole segment; 12. Insulating frame; 121. First through hole; 13. End face protrusion ring; 14. Second metal end cap; 2. First metal end cap; 21. Assembly ring groove; 3. Metal conductive strip; 31. Top rod; 32. Support arm. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0021] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0023] See also Figures 1 to 7As shown, according to an embodiment of the present invention, a plastic-encapsulated motor is provided, including a plastic-encapsulated stator 1 and a first metal end cap 2 sealing one side of the plastic-encapsulated stator 1. The first metal end cap 2 may be made of a metal material such as aluminum alloy or copper. The plastic-encapsulated stator 1 has a stator core 11, and a blind hole 111 extending along its stacking direction (i.e., the axial direction of the plastic-encapsulated stator 1) is formed on the end face of the stator core 11 facing the first metal end cap 2. The plastic-encapsulated motor also includes a metal conductive strip 3. In a specific embodiment, the aforementioned metal conductive strip 3 is a copper strip, and the first end of the metal conductive strip 3 (with...) Figure 1 The orientation shown is for reference, i.e., the lower end) is inserted and positioned in the blind hole 111. When the first metal end cap 2 is assembled on the plastic-encapsulated stator 1, the two ends of the metal conductive strip 3 (the aforementioned first end and the second end opposite to the first end) are clamped between the bottom wall of the blind hole 111 and the inner wall of the first metal end cap 2. It is understood that the second metal end cap 14 is arranged opposite to the first metal end cap 2 to form a rotational support for the two ends of the shaft of the plastic-encapsulated motor rotor (not shown in the figure) through corresponding bearings (not shown in the figure). The aforementioned second metal end cap 14 is formed as a whole with the plastic-encapsulated stator 1 in a plastic-encapsulated manner.

[0024] In this technical solution, a blind hole 111 is formed on the end face of the stator core 11 to accommodate and position the first end of the metal conductive strip 3. At the same time, the bottom wall of the first metal end cap 2 and the blind hole 111 can clamp the two ends of the metal conductive strip 3 after the first metal end cap 2 is assembled on the encapsulated stator 1. In this way, while realizing the electrical connection between the first metal end cap 2 and the stator core 11 and reducing the voltage difference between the first metal end cap 2 and the second metal end cap 14, thereby reducing the electro-corrosion of the motor, the joint clamping of the metal conductive strip 3 by the first metal end cap 2 and the bottom wall of the blind hole 111, as well as the accommodation and positioning of the first end of the metal conductive strip 3 by the blind hole 111, makes the assembly of the metal conductive strip 3 in the encapsulated motor very simple and convenient, which can improve the production efficiency of the encapsulated motor and ensure the reliable fixation of the metal conductive strip 3.

[0025] In some embodiments, the blind hole 111 includes a first hole segment 1111 and a second hole segment 1112 arranged sequentially along the depth direction of the blind hole 111. The hole wall of the second hole segment 1112 protrudes beyond the hole wall of the first hole segment 1111, that is, the second hole segment 1112 is specifically formed at the end of the first hole segment 1111 away from the first metal end cap 2 and is in a bulging state. When any cross-section of the blind hole 111 is circular, that is, the diameter of the second hole segment 1112 is larger than the diameter of the first hole segment 1111. In a specific embodiment, the first hole segment 1111 and the second hole segment 1112 are arranged coaxially, so that in an axial section, the blind hole 111 has a T-shaped cross-section. The metal conductive strip 3 includes a top rod 31 and two Y-shaped (also called dovetail) support arms 32 connected to the first end of the top rod 31, that is, the two support arms 32 are in a forked form. The support arm 32 has a first state and a second state. In the first state, the maximum distance between the two support arms 32 is not greater than the minimum passage distance of the first hole segment 1111, so as to ensure that the two support arms 32 can remain in the first state and pass through the aforementioned first hole segment 1111 during the insertion of the metal conductive strip 3 into the blind hole 111. In the second state, the minimum distance between the two support arms 32 is greater than the minimum passage distance of the first hole segment 1111, so as to ensure that when the two support arms 32 enter the second hole segment 1112, the first metal end cap 2 applies force to the second end of the top rod 31, and the two support arms 32 can be snapped and positioned in the second hole segment 1112 after flipping outward. That is, during the process of assembling the first metal end cap 2 into the plastic-sealed stator 1, the two support arms 32 switch from the first state to the second state under the clamping action of the first metal end cap 2 and the bottom wall of the blind hole 111.

[0026] In this technical solution, by setting two forked support arms 32 at the first end of the top rod 31, after the two support arms 32 enter the second hole section 1112 through the first hole section 1111, the first metal end cap 2 applies force to the second end of the top rod 31, so that the two support arms 32 are turned outward under the obstruction of the bottom wall of the blind hole 111, thereby making the outer diameter of the first end of the metal conductive strip 3 larger than the minimum passage distance of the first hole section 1111, so that the first end of the metal conductive strip 3 is reliably and stably clamped in the second hole section 1112, ensuring that the position of the metal conductive strip 3 is reliable and stable.

[0027] In some embodiments, when the metal conductive strip 3 is in a free state (i.e., the first metal end cap 2 and the bottom wall of the blind hole 111 do not apply clamping force to it), the length of the metal conductive strip 3 is H, the length of the support arm 32 in the length direction of the top rod 31 is h, and when the first metal end cap 2 is assembled on the plastic-sealed stator 1 (i.e., the first metal end cap 2 and the bottom wall of the blind hole 111 apply clamping force to it), the axial distance between the inner wall area of ​​the first metal end cap 2 in contact with the top rod 31 and the bottom wall of the blind hole 111 is H', where H' < Hh.

[0028] In this technical solution, H' is designed to be less than Hh, thereby ensuring that the first metal end cap 2 and the bottom wall of the blind hole 111 reliably clamp the metal conductive strip 3 axially, and further ensuring the positional reliability and stability of the metal conductive strip 3.

[0029] In some embodiments, an insulating frame 12 is assembled on the side end face of the stator core 11 near the first metal end cover 2. It is understood that a stator winding (not indicated in the figure) is wound on the insulating frame 12. A first through hole 121 is provided on the area of ​​the insulating frame 12 corresponding to the position of the opening of the blind hole 111. The metal conductive strip 3 passes through the first through hole 121 in the first state.

[0030] In this technical solution, by setting a corresponding first through hole 121 on the insulating frame 12, the mating length between the metal conductive strip 3 and the plastic-encapsulated stator 1 can be increased to a certain extent. After the metal conductive strip 3 is assembled, it can limit the radial displacement of the top rod 31 to a certain extent, thereby further ensuring the positional reliability of the metal conductive strip 4.

[0031] In some embodiments, a motor drive plate (not shown in the figure) is assembled on the inner wall of the first metal end cap 2. The area of ​​the motor drive plate corresponding to the opening position of the blind hole 111 is provided with a second through hole (not shown in the figure). The diameter of the second through hole is equal to the outer diameter of the second end of the top rod 31. That is, the second through hole and the second end of the top rod 31 form an inner and outer fitting and a tight fit. In this way, the motor drive plate can reliably limit the second end of the metal conductive strip 3, further ensuring the positional reliability of the metal conductive strip 4. In particular, it can significantly reduce the occurrence of vibration displacement phenomenon of the top rod 31 during the operation of the encapsulated motor.

[0032] It should be noted that the encapsulated motor in this technical solution is equipped with a built-in motor drive board. During the operation of the motor, the motor drive board will also generate an electric potential on the first metal end cap 2, thereby increasing the voltage difference between the first metal end cap 2 and the second metal end cap 14. The second end of the metal conductive strip 3 in this invention is electrically connected to the first metal end cap 2, which can effectively reduce the voltage on the first metal end cap 2, thereby reducing the voltage difference between the first metal end cap 2 and the second metal end cap 14 and reducing the adverse effects of electro-corrosion.

[0033] In some embodiments, the outer periphery of the inner wall of the first metal end cap 2 is formed with an assembly ring groove 21 recessed along the side away from the plastic-encapsulated stator 1. The assembly ring groove 21 is fastened to the end face protrusion ring 13 of the plastic-encapsulated stator 1, and the second end of the push rod 31 is embedded in the assembly ring groove 21.

[0034] In this technical solution, the waterproof performance of the mating position between the first metal end cap 2 and the plastic-sealed stator 1 can be improved by the fastening and assembly of the assembly ring groove 21 and the end face protrusion ring 13. At the same time, the position reliability of the metal conductive strip 3 can be further improved by embedding the second end of the top rod 31 into the assembly ring groove 21.

[0035] In some embodiments, the radially outer groove wall of the assembly ring groove 21 (not shown in the figure) and the radially outer ring wall of the end face convex ring 13 (not shown in the figure) are interference-fitted. When the first metal end cap 2 is assembled on the plastic-encapsulated stator 1, the second end of the push rod 31 is located in the annular gap between the radially inner groove wall of the assembly ring groove 21 (not shown in the figure) and the radially inner ring wall of the end face convex ring 13 (not shown in the figure), and the radial width of the annular gap is not greater than the radial thickness of the second end of the push rod 31 on the stator core 11.

[0036] In this technical solution, the first metal end cap 2 and the encapsulated stator 1 are assembled together by an interference fit, which can greatly simplify the assembly process of the encapsulated motor. After the first metal end cap 2 and the encapsulated stator 1 are assembled by interference fit, the axial clamping of the metal conductive strip 3 located between it and the bottom wall of the blind hole 111 can be realized simultaneously, and the radial clamping of the second end of the metal conductive strip 3 can be formed at the same time. The positional reliability of the metal conductive strip 3 is further improved, and the assembly production efficiency of the encapsulated motor is greatly improved.

[0037] In some embodiments, the push rod 31 has a corrugated section on the side near the support arm 32. The corrugated section can be, for example, wavy or serpentine. This gives the push rod 31 a buffer elastic section at one end that acts like a spring. This corrugated section allows the length of the push rod 31 to be designed to be relatively larger. This reduces the axial force during the assembly of the first metal end cap 2 and the plastic-encapsulated stator 1. On the other hand, it can rely on its own elastic force to ensure that both ends of the metal conductive strip 3 can reliably abut against the bottom wall of the first metal end cap 2 and the blind hole 111.

[0038] In some embodiments, the stator core 11 is formed by stacking three types of laminations sequentially along a direction away from the first metal end cap 2. Specifically, the first type of lamination has a through hole corresponding to the first hole segment 1111, and when the through hole is a round hole, its diameter is D1 (e.g., ...). Figure 2 As shown), the second type of lamination has a through hole corresponding to the second hole segment 1112. When the through hole is a round hole, its diameter is D2 (as shown). Figure 2 As shown), D1 < D2, while no through hole is formed on the third type of lamination. These three types of laminations are stacked sequentially along the direction away from the first metal end cap 2 to form the stator core 11 with the aforementioned blind hole 111 in this invention. Correspondingly, the outer diameter of the two aforementioned support arms 32 in their free state is L, and after being deformed by the aforementioned first metal end cap 2, the outer diameter becomes L'. At this time, L ≤ D1 < D2, and D1 < L' ≤ D2.

[0039] For ease of manufacturing, the cross-sections of the aforementioned blind hole 111 and top rod 31 are preferably circular.

[0040] The assembly of encapsulated motors also follows these steps: Step 1: Stamp each lamination into shape using a stamping die and stack the three types of laminations into a stator core 11 according to the shape of the blind hole 111; Step 2: The stator assembly (including the second metal end cap 14), also known as the aforementioned plastic-encapsulated stator 1, is formed through processes such as winding and injection molding. Step 3: Place the first end of the metal conductive strip 3 into the blind hole 111, and use equipment such as a hydraulic press to press the first metal end cap 2 into the stator assembly (interference fit). At the same time, the anti-electro-erosion structure is finally formed and takes effect.

[0041] According to an embodiment of the present invention, an air conditioner is also provided, including the above-described encapsulated motor.

[0042] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A plastic-encapsulated motor, characterized in that, The device includes a plastic-encapsulated stator (1) and a first metal end cap (2) that is sealed on one side of the plastic-encapsulated stator (1). The plastic-encapsulated stator (1) has a stator core (11). A blind hole (111) extending along its stacking direction is formed on the end face of the stator core (11) facing the first metal end cap (2). The plastic-encapsulated motor also includes a metal conductive strip (3). The first end of the metal conductive strip (3) is inserted and positioned in the blind hole (111). When the first metal end cap (2) is assembled on the plastic-encapsulated stator (1), the two ends of the metal conductive strip (3) are clamped between the bottom wall of the blind hole (111) and the inner wall of the first metal end cap (2).

2. The encapsulated motor according to claim 1, characterized in that, The blind hole (111) includes a first hole segment (1111) and a second hole segment (1112) arranged sequentially along the depth direction of the blind hole (111). The hole wall of the second hole segment (1112) protrudes beyond the hole wall of the first hole segment (1111). The metal conductive strip (3) includes a top rod (31) and two Y-shaped support arms (32) connected to the first end of the top rod (31). The two support arms (32) have a first state and a second state. In the first state, the maximum distance between the two support arms (32) is not greater than the minimum passage distance of the first hole segment (1111). In the second state, the minimum distance between the two support arms (32) is greater than the minimum passage distance of the first hole segment (1111). During the process of assembling the first metal end cap (2) onto the plastic-sealed stator (1), the two support arms (32) switch from the first state to the second state under the clamping action of the first metal end cap (2) and the bottom wall of the blind hole (111).

3. The encapsulated motor according to claim 2, characterized in that, When the metal conductive strip (3) is in a free state, the length of the metal conductive strip (3) is H, the length of the support arm (32) in the length direction of the top rod (31) is h, and when the first metal end cap (2) is assembled on the plastic-sealed stator (1), the axial distance between the inner wall area of ​​the first metal end cap (2) in contact with the top rod (31) and the bottom wall of the blind hole (111) is H', H' < Hh.

4. The encapsulated motor according to claim 2, characterized in that, An insulating frame (12) is assembled on one end face of the stator core (11) near the first metal end cap (2). A first through hole (121) is provided on the area of ​​the insulating frame (12) corresponding to the position of the opening of the blind hole (111). The metal conductive strip (3) passes through the first through hole (121) in the first state.

5. The encapsulated motor according to claim 3, characterized in that, A motor drive plate is assembled on the inner wall of the first metal end cap (2). The area of ​​the motor drive plate corresponding to the opening position of the blind hole (111) is provided with a second through hole. The diameter of the second through hole is equal to the outer diameter of the second end of the top rod (31).

6. The encapsulated motor according to claim 5, characterized in that, The outer periphery of the inner wall of the first metal end cap (2) is formed with an assembly ring groove (21) recessed along the side away from the plastic-sealed stator (1). The assembly ring groove (21) is fastened to the end face protrusion ring (13) of the plastic-sealed stator (1), and the second end of the top rod (31) is embedded in the assembly ring groove (21).

7. The encapsulated motor according to claim 6, characterized in that, The radial outer groove wall of the assembly ring groove (21) and the radial outer ring wall of the end face convex ring (13) are interference-fitted. When the first metal end cap (2) is assembled on the plastic-sealed stator (1), the second end of the push rod (31) is located in the annular gap between the radial inner groove wall of the assembly ring groove (21) and the radial inner ring wall of the end face convex ring (13), and the radial width of the annular gap is not greater than the thickness of the second end of the push rod (31) in the radial direction of the stator core (11).

8. The encapsulated motor according to claim 2, characterized in that, The top rod (31) has a wavy section on the side near the support arm (32).

9. The encapsulated motor according to claim 1, characterized in that, The stator core (11) is formed by stacking three types of laminations in sequence along a direction away from the first metal end cap (2).

10. An air conditioner, characterized in that, The encapsulated motor includes any one of claims 1 to 9.

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