An electric machine

Abstract

The application discloses a motor, which comprises a fixed end cover and a rotating end cover assembly, the rotating end cover assembly is rotatably arranged on the axial side of the fixed end cover, and the motor further comprises a waterproof ring, which is arranged between the fixed end cover and the rotating end cover assembly. The waterproof ring is provided with a rotary bending blocking structure which is in sealing cooperation with the inner wall of the rotating end cover assembly. The sealing cooperation between the rotary bending blocking structure of the waterproof ring and the inner wall of the rotating end cover assembly can directly isolate foreign matters such as water dust, so that the dustproof and waterproof effects are achieved. The overall process is simple, and the problems of low dustproof and waterproof grade of the traditional outer rotor motor, water and foreign matters entering the motor and the like are effectively improved. The sealing performance of the motor is improved, the dustproof and waterproof grade of the motor is improved, and the safety problems such as electric leakage and short circuit during the use of the motor are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a motor. Background Technology

[0002] Electric motors are widely used in various industries. In current motor technology, motors are mainly classified into two types based on their main structure: internal rotor motors and external rotor motors. These motor types include AC asynchronous motors, reluctance switching motors, and permanent magnet motors. In an internal rotor motor, the rotating parts are inside, while the external stator is stationary; in an external rotor motor, the rotating parts are on the outside, while the internal stator is stationary.

[0003] In traditional external rotor motor structures, the low dust and water resistance often leads to problems such as water ingress and foreign object entry, affecting the motor's lifespan and safety during use. Summary of the Invention

[0004] The purpose of this invention is to provide an electric motor that addresses the technical problem of low dust and water resistance in existing external rotor motors.

[0005] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a motor, which includes a fixed end cover and a rotating end cover assembly. The rotating end cover assembly is rotatably disposed on one axial side of the fixed end cover. The motor also includes a waterproof ring disposed between the fixed end cover and the rotating end cover assembly. The waterproof ring has a bend-reversing blocking structure that seals with the inner wall of the rotating end cover assembly.

[0006] In some embodiments, the rotating end cap assembly has an opening, through which the turning bend blocking structure seals with the inner wall of the rotating end cap assembly.

[0007] In some embodiments, the waterproof ring has an inner bore, and the bend-blocking structure includes a tubular segment extending axially from the inner bore into the interior of the rotating end cap assembly, a first blocking segment extending from the outer periphery of the tubular segment into the inner wall of the rotating end cap assembly, and a second blocking segment extending from the first blocking segment into the waterproof ring, the second blocking segment sealingly engaging with the inner wall of the rotating end cap assembly.

[0008] In some embodiments, the opening is provided with a waterproof platform structure, which can be combined with the bend and deflection barrier structure to form a labyrinth seal structure.

[0009] In some embodiments, the waterproof platform structure includes a first extension extending radially outward along the opening and a second extension connected to the first extension and extending axially toward the waterproof ring, wherein a first blocking section is fitted with the first extension and the second blocking section is fitted with the second extension.

[0010] In some embodiments, the fixed end cap is constructed with a support column extending axially, a winding core assembly is sleeved on the support column, a mounting through hole is constructed inside the support column, a rotating shaft is inserted into the mounting through hole, and a sealing cap is provided at the end of the mounting through hole away from the rotating end cap assembly.

[0011] In some embodiments, the opening at the end of the through-hole away from the rotating end cap assembly is configured with a countersunk hole, and the sealing cap is embedded in the countersunk hole.

[0012] In some embodiments, the mounting through hole is located at the bottom of the countersunk hole and has a mounting groove. The mounting groove is fitted with a first bearing, and the shaft passes through the first bearing. A locking screw is installed at the end of the shaft facing the countersunk hole. The diameter of the outer circle of the head of the locking screw is larger than the diameter of the inner hole of the first bearing on the shaft. And / or, the sealing cover is configured with a receiving cavity to accommodate the locking screw.

[0013] In some embodiments, the through hole located inside the rotating end cap assembly has an installation slot, the installation slot is equipped with a second bearing, the rotating shaft passes through the second bearing, and the outer periphery of the rotating shaft is provided with an annular groove, the annular groove is located on the side of the second bearing away from the support column, and the annular groove is equipped with a retaining ring, the outer diameter of the retaining ring being larger than the inner diameter of the inner hole of the second bearing.

[0014] In some embodiments, the rotating end cap assembly has a through hole through which the rotating shaft extends out of the rotating end cap assembly, and a plurality of anti-rotation protrusions are provided at the mating point between the rotating shaft and the through hole.

[0015] Compared with the prior art, the motor of the present invention has at least the following beneficial effects:

[0016] This invention discloses a motor comprising a fixed end cover and a rotating end cover assembly. The rotating end cover assembly is rotatably disposed on one axial side of the fixed end cover. The motor also includes a waterproof ring disposed between the fixed end cover and the rotating end cover assembly. The waterproof ring has a bend-and-turn blocking structure that seals with the inner wall of the rotating end cover assembly. This bend-and-turn blocking structure prevents water and dust from entering the motor. Therefore, the sealing fit between the bend-and-turn blocking structure of the waterproof ring and the inner wall of the rotating end cover assembly directly isolates water, dust, and other foreign objects, achieving dustproof and waterproof effects. The overall process is simple and can effectively improve the low dustproof and waterproof rating of traditional external rotor motors, which leads to problems such as water ingress and foreign object ingress. It improves the sealing performance and dustproof and waterproof rating of the motor, effectively avoiding safety problems such as leakage and short circuits during motor use.

[0017] In addition, the bending structure of the turn-turning and blocking structure increases the surface area of ​​the motor, thereby increasing the physical heat dissipation area, enabling the motor to dissipate heat effectively and thus extending the service life of the motor.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A cross-sectional view of the motor provided in an embodiment of the present invention;

[0021] Figure 2 A cross-sectional view of the assembly of the motor shaft, winding core assembly and fixed end cover provided in an embodiment of the present invention;

[0022] Figure 3 A cross-sectional view of the fixed end cover of the motor provided in an embodiment of the present invention;

[0023] Figure 4 A three-dimensional structural schematic diagram of the fixed end cover of the motor provided in an embodiment of the present invention;

[0024] Figure 5 A cross-sectional view of the rotating end cover assembly of the motor and the waterproof ring provided in an embodiment of the present invention;

[0025] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 A cross-sectional view of the rotating end cover assembly of the motor provided in an embodiment of the present invention;

[0027] Figure 8 A three-dimensional structural schematic diagram of the rotating end cover assembly of the motor provided in an embodiment of the present invention;

[0028] Figure 9 A cross-sectional view of the waterproof ring of the motor provided in an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the motor shaft provided in an embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of the structure of the sealing cover of the motor provided in an embodiment of the present invention;

[0031] Figure 12 This is a schematic diagram of the overall assembly structure of the motor provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Fixed end cap; 11. Support column; 12. Mounting through hole; 121. Countersunk hole; 122. Mounting slot; 2. Winding core assembly; 3. Rotating end cap assembly; 31. Opening; 32. Waterproof platform structure; 321. First extension section; 322. Second extension section; 33. Magnetic material; 34. Through hole; 35. Mating boss; 4. Rotating shaft; 41. Anti-rotation protrusion; 42. Annular groove; 5. Waterproof ring; 51. Inner hole; 52. Turning and bending blocking structure; 521. Tubular section; 522. First blocking section; 523. Second blocking section; 6. Sealing cap; 61. Receiving cavity; 71. First bearing; 72. Locking screw; 73. Second bearing; 74. Snap ring. Detailed Implementation

[0034] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0035] In the description of this invention, it should be clearly stated that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," "horizontal," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing this invention, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Example 1

[0038] like Figure 1-12As shown, an embodiment of the present invention provides a motor, which includes a fixed end cover 1 and a rotating end cover assembly 3. The rotating end cover assembly 3 is rotatably disposed on one axial side of the fixed end cover 1. The motor also includes a waterproof ring 5, which is disposed between the fixed end cover 1 and the rotating end cover assembly 3. The waterproof ring 5 is constructed with a turning bend blocking structure 52 that seals with the inner wall of the rotating end cover assembly 3.

[0039] In this embodiment, the motor includes a fixed end cover 1, a winding core assembly 2, a rotating end cover assembly 3, and a rotating shaft 4. The rotating end cover assembly 3 is rotatably disposed on one axial side of the fixed end cover 1. Specifically, the winding core assembly 2 is mounted on the fixed end cover 1, and the rotating end cover assembly 3 is sleeved on the winding core assembly 2. The rotating shaft 4 is rotatably disposed on the fixed end cover 1 and connected to the rotating end cover assembly 3, extending to the side of the rotating shaft 4 away from the fixed end cover 1. The rotating end cover assembly 3 has a magnetic material 33. When the winding core assembly 2 mounted on the fixed end cover 1 is energized, it generates a rotating magnetic field with the magnetic material 33 on the rotating end cover assembly 3. At this time, the fixed end cover 1 is fixed to the ground or a fixed position such as a mounting base through several mounting holes and bolts. The rotating end cover assembly 3 rotates, driving the rotating shaft 4 to rotate, and the rotating shaft 4 in turn drives the impeller and other load cells. The motor in this embodiment has a waterproof ring 5 disposed between the fixed end cover 1 and the rotating end cover assembly 3. A bend-back blocking structure 52 is constructed on the waterproof ring 5 to seal against the inner wall of the rotating end cover assembly 3. Specifically, the bend-back blocking structure 52 can form at least one blocking bend at the point of contact with the inner wall of the rotating end cover assembly 3. The blocking bend prevents water and dust from entering the motor. Therefore, the sealing fit between the bend-back blocking structure 52 of the waterproof ring 5 and the inner wall of the rotating end cover assembly 3 can directly isolate water, dust and other foreign objects, achieving the function of dustproof and waterproof. The overall process is simple and can effectively improve the low dustproof and waterproof level of traditional external rotor motors, which leads to problems such as water ingress and foreign object ingress. It improves the sealing performance and dustproof and waterproof level of the motor, and effectively avoids safety problems such as leakage and short circuit during motor use.

[0040] In addition, the bending structure of the turning and bending blocking structure 52 increases the surface area of ​​the motor, thereby increasing the physical heat dissipation area, enabling the motor to dissipate heat effectively and thus extending the service life of the motor.

[0041] In some embodiments, the rotating end cap assembly 3 has an opening 31, through which the turning bend blocking structure 52 is sealed to the inner wall of the rotating end cap assembly 3.

[0042] In this embodiment, the bend-blocking structure 52 of the waterproof ring 5 is sealed to the inner wall of the rotating end cap assembly 3 via the opening 31, specifically for sealing the opening 31 of the rotating end cap assembly 3.

[0043] In some embodiments, the waterproof ring 5 is a sheet-like structure with an inner hole 51, and the bend-reversing blocking structure 52 includes a tubular segment 521 extending axially from the inner hole 51 toward the interior of the rotating end cap assembly 3, a first blocking segment 522 extending from the outer periphery of the tubular segment 521 toward the inner wall of the rotating end cap assembly 3, and a second blocking segment 523 extending from the first blocking segment 522 toward the waterproof ring 5, the second blocking segment 523 sealingly engaging with the inner wall of the rotating end cap assembly 3.

[0044] In this embodiment, the waterproof ring 5 is a sheet-like structure, specifically a circular sheet-like structure. The waterproof ring 5 has an inner hole 51. The bend-turning blocking structure 52 specifically includes a tubular section 521 extending axially from the inner hole 51 into the interior of the rotating end cap assembly 3, a first blocking section 522 extending from the outer periphery of the tubular section 521 into the inner wall of the rotating end cap assembly 3, and a second blocking section 523 extending from the first blocking section 522 into the waterproof ring 5. The tubular section 521, the first blocking section 522, and the second blocking section 523 are sequentially connected to form the bend-turning blocking structure 52. The bend-turning blocking structure 52 forms a blocking groove. Foreign objects such as water and dust entering the blocking groove can be directly isolated, achieving the function of dustproofing and waterproofing. The overall process is simple and can effectively improve the low dustproof and waterproof level of traditional external rotor motors, which leads to problems such as water ingress and foreign object ingress into the motor. It improves the sealing performance and dustproof and waterproof level of the motor, and effectively avoids safety problems such as leakage and short circuit during motor use.

[0045] In addition, there can be multiple second blocking segments 523. Multiple second blocking segments 523 are spaced apart along the length of the first blocking segment 522 to form more blocking grooves. The more blocking grooves there are, the better the dustproof and waterproof effect.

[0046] In some embodiments, a waterproof platform structure 32 is provided at the opening 31 of the rotating end cap assembly 3, and the waterproof platform structure 32 and the turning bend blocking structure 52 can be combined to form a labyrinth seal structure.

[0047] In this embodiment, a waterproof platform structure 32 is constructed at the opening 31 of the rotating end cover assembly 3. The waterproof platform structure 32 and the turning and bending blocking structure 52 are combined to form a labyrinth sealing structure. The labyrinth sealing structure can directly isolate water, dust and other foreign objects, achieving the function of dustproof and waterproof. The overall process is simple and can effectively improve the low dustproof and waterproof level of traditional external rotor motors, which leads to problems such as water ingress and foreign object ingress into the motor. It improves the sealing performance of the motor and improves the dustproof and waterproof level of the motor, effectively avoiding safety problems such as leakage and short circuit during the use of the motor.

[0048] In some embodiments, the waterproof platform structure 32 includes a first extension 321 extending radially outward along the opening 31 of the rotating end cap assembly 3 and a second extension 322 connected to the first extension 321 and extending axially toward the waterproof ring 5. A first blocking section 522 is fitted to the first extension 321, and a second blocking section 523 is fitted to the second extension 322.

[0049] In this embodiment, the waterproof platform structure 32 specifically includes a first extension section 321 extending radially outward from the opening 31 of the rotating end cap assembly 3 and a second extension section 322 connected to the first extension section 321 and extending axially toward the waterproof ring 5. A labyrinth sealing structure is formed by the first blocking section 522 fitting with the first extension section 321 and the second blocking section 523 fitting with the second extension section 322. This structure can improve the sealing performance of the motor and improve the dustproof and waterproof rating of the motor, effectively avoiding safety problems such as leakage and short circuit during the use of the motor.

[0050] In some embodiments, the fixed end cap 1 is constructed with a support column 11 extending along the axial direction, the winding core assembly 2 is sleeved on the support column 11, the support column 11 is constructed with a mounting through hole 12, the rotating shaft 4 is rotatably inserted into the mounting through hole 12, and the opening of the mounting through hole 12 away from the rotating end cap assembly 3 is covered with a sealing cap 6.

[0051] In this embodiment, when the waterproof ring 5 is fixed on the fixed end cover 1, the waterproof ring 5 is sleeved on the support column 11 through the inner hole 51. The side of the waterproof ring 5 away from the rotating end cover assembly 3 is fitted with the rotating end cover assembly 3. The winding core assembly 2 is sleeved on the support column 11 and fixed by the support column 11. The rotating shaft 4 is rotatably inserted into the mounting through hole 12 and fixed by the mounting through hole 12. The opening of the mounting through hole 12 away from the rotating end cover assembly 3 is covered with a sealing cover 6. The sealing cover 6 prevents water, dust and other foreign objects from entering the motor from the end of the mounting through hole 12 away from the rotating end cover assembly 3, thus achieving the function of dustproof and waterproof. The overall process is simple and can effectively improve the low dustproof and waterproof level of traditional external rotor motors, which leads to problems such as water ingress and foreign object ingress. It improves the sealing performance of the motor and the dustproof and waterproof level of the motor, and effectively avoids safety problems such as leakage and short circuit during the use of the motor.

[0052] In some embodiments, the opening of the end of the through hole 12 away from the rotating end cap assembly 3 is provided with a countersunk hole 121, and the sealing cap 6 is embedded in the countersunk hole 121.

[0053] In this embodiment, a countersunk hole 121 is constructed at the opening of the through hole 12 away from the rotating end cover assembly 3. The sealing cover 6 is embedded in the countersunk hole 121, which improves the fixing firmness of the sealing cover 6 and can prevent the sealing cover 6 from falling off. At the same time, it prevents the sealing cover 6 from being exposed outside the fixed end cover 1, thus improving the aesthetics of the motor.

[0054] In some embodiments, the mounting hole 12 is located at the bottom of the countersunk hole 121 and has a mounting groove 122 with a shoulder. The mounting groove 122 is equipped with a first bearing 71, and the rotating shaft 4 passes through the first bearing 71. A locking screw 72 is installed at the end of the rotating shaft 4 facing the countersunk hole 121. The diameter of the outer circle of the head of the locking screw 72 is larger than the diameter of the inner hole of the first bearing 71.

[0055] In this embodiment, a mounting groove 122 with a shoulder is constructed at the bottom position of the mounting through hole 12 located at the countersunk hole 121. A first bearing 71 is installed in the mounting groove 122, and the rotating shaft 4 is inserted into the first bearing 71, so that the rotating shaft 4 is rotatably installed in the mounting through hole 12. A locking screw 72 is installed at one end of the rotating shaft 4 facing the countersunk hole 121. The diameter of the outer circle of the head of the locking screw 72 is larger than the diameter of the inner hole of the first bearing 71, so as to prevent the rotating shaft 4 from moving away from the countersunk hole 121 in the mounting through hole 12.

[0056] In some embodiments, the sealing cover 6 is configured with a receiving cavity 61 for accommodating the locking screw 72, thereby preventing interference between the locking screw 72 and the sealing cover 6. The sealing cover 6 can be an integral structure, which is convenient for processing.

[0057] In some embodiments, the through hole 12 located inside the rotating end cap assembly 3 has a mounting groove 122 with a shoulder. The mounting groove 122 is equipped with a second bearing 73. The rotating shaft 4 passes through the second bearing 73. The outer periphery of the rotating shaft 4 is provided with an annular groove 42. The annular groove 42 is located on the side of the second bearing 73 away from the support column 11. The annular groove 42 is equipped with a retaining ring 74. The outer diameter of the retaining ring 74 is larger than the inner diameter of the inner hole of the second bearing 73.

[0058] In this embodiment, a mounting groove 122 with a shoulder is also constructed at the opening of the mounting hole 12 located inside the rotating end cover assembly 3, and a second bearing 73 is installed in the mounting groove 122. The two mounting grooves 122 limit the axial distance between the second bearing 73 and the first bearing 71. When the rotating shaft 4 passes through the second bearing 73 and the first bearing 71, the locking screw 72 restricts the axial movement of the rotating shaft 4 from the first bearing 71 to the second bearing 73. In this embodiment, an annular groove 42 is provided on the outer periphery of the rotating shaft 4. The annular groove 42 is located on the side of the second bearing 73 away from the support column 11, and the outer diameter of the retaining ring 74 is larger than the inner diameter of the inner hole of the second bearing 73. Therefore, the axial movement of the rotating shaft 4 from the second bearing 73 to the first bearing 71 can be prevented, and the axial movement of the rotating shaft 4 to both ends within the mounting hole 12 can be prevented, thereby improving the smoothness of motor operation.

[0059] In some embodiments, the rotating end cap assembly 3 has a through hole 34, through which the rotating shaft 4 extends. Multiple anti-rotation protrusions 41 are provided at the mating point between the rotating shaft 4 and the through hole 34. These anti-rotation protrusions 41 can be strip-type or point-type, etc. The strip-type or point-type anti-rotation protrusions on the rotating shaft 4 are used for an interference fit with the through hole 34 of the rotating end cap assembly 3. When the rotating end cap assembly 3 rotates, it can drive the rotating shaft 4 to rotate, thereby driving the impeller and other loads on the rotating shaft 4 to operate, improving the reliability of the motor power transmission.

[0060] In some embodiments, a mating boss 35 is constructed on at least one side of the opening of the through hole 34 in the axial direction. By using the mating boss 35, the length of the interference fit between the through hole 34 and the rotating shaft 4 is increased, thereby further improving the reliability of the motor power transmission.

[0061] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electric motor, the electric motor comprising a fixed end cover and a rotating end cover assembly, the rotating end cover assembly being rotatably disposed on one axial side of the fixed end cover, characterized in that, The motor also includes a waterproof ring, which is disposed between the fixed end cover and the rotating end cover assembly. The waterproof ring has a bend-blocking structure that seals with the inner wall of the rotating end cover assembly. The rotating end cap assembly has an opening, and the turning and bending blocking structure is sealed to the inner wall of the rotating end cap assembly via the opening; The waterproof ring has an inner hole, and the bend-blocking structure includes a tubular section extending axially from the inner hole into the interior of the rotating end cap assembly, a first blocking section extending from the outer periphery of the tubular section into the inner wall of the rotating end cap assembly, and a second blocking section extending from the first blocking section into the waterproof ring, wherein the second blocking section is in a sealing fit with the inner wall of the rotating end cap assembly. The opening is provided with a waterproof platform structure, and the waterproof platform structure and the turning and bending blocking structure can be combined to form a labyrinth sealing structure. The waterproof platform structure includes a first extension section extending radially outward along the opening and a second extension section connected to the first extension section and extending axially toward the waterproof ring. The first blocking section is fitted with the first extension section, and the second blocking section is fitted with the second extension section.

2. The motor according to claim 1, characterized in that, The fixed end cap has a support column extending along the axial direction. A winding core assembly is sleeved on the support column. The support column has a through hole. A rotating shaft is inserted into the through hole. A sealing cap is provided at the end of the through hole away from the rotating end cap assembly.

3. The motor according to claim 2, characterized in that, The opening at the end of the mounting hole away from the rotating end cap assembly has a countersunk hole, and the sealing cap is embedded in the countersunk hole.

4. The motor according to claim 3, characterized in that, The mounting through hole is located at the bottom of the countersunk hole and has a mounting groove. The mounting groove is equipped with a first bearing. The rotating shaft passes through the first bearing. A locking screw is installed at the end of the rotating shaft facing the countersunk hole. The diameter of the outer circle of the head of the locking screw is larger than the diameter of the inner hole of the first bearing. And / or, the sealing cover is constructed with a receiving cavity to accommodate the locking screw.

5. The motor according to claim 2, characterized in that, The mounting through hole is located inside the rotating end cap assembly and has an installation groove. The installation groove is equipped with a second bearing, and the rotating shaft passes through the second bearing. The outer circumference of the rotating shaft is provided with an annular groove. The annular groove is located on the side of the second bearing away from the support column. The annular groove is equipped with a retaining ring, and the outer diameter of the retaining ring is larger than the inner diameter of the inner hole of the second bearing.

6. The motor according to claim 2, characterized in that, The rotating end cap assembly has a through hole, through which the rotating shaft extends out of the rotating end cap assembly, and multiple anti-rotation protrusions are provided at the point where the rotating shaft mates with the through hole.

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