Base and end cover sealing structure and motor

Abstract

The invention relates to the technical field of power motors, in particular to a base and end cover sealing structure and a motor, and the base and end cover sealing structure comprises a base, a shell, an outer end cover, an inner end cover and a sealing element; the inner end cover is detachably arranged at the first end of the base, the second end, opposite to the inner end cover, of the base is rotationally connected with a rotary connecting assembly, and the rotary connecting assembly is connected with the shell. One end of the outer end cover is connected with the shell, the other end of the outer end cover is opposite to the inner end cover, and the sealing piece is arranged between the inner end cover and the outer end cover and seals the opposite space between the inner end cover and the outer end cover; a connecting buckle is arranged at the end, facing the rotary connecting assembly, of the inner end cover, and an assembling clamping groove matched with the connecting buckle is formed in the base. The problems that traditional threaded connection is low in efficiency and prone to failure are solved, and efficient assembly and reliable sealing are achieved while the stability of the overall structure after connection with external accessories is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of power motor technology, and in particular to a base and end cover sealing structure and a motor. Background Technology

[0002] In modern industry and automation, motors, as core drive components, are increasingly valued for their reliability, integration, and ease of maintenance. Motors, especially those used in new energy vehicles, industrial robots, and intelligent equipment, often require compact structures, excellent sealing performance, and stable, reliable electrical connections. Traditional motor end covers are typically fixed to the base with bolts. This structure suffers from cumbersome assembly processes, low production efficiency, and the bolts may loosen or corrode under long-term vibration, affecting connection reliability. Furthermore, conventional sealing designs often rely on axial compression of the end cover to achieve static sealing, which limits space utilization and ease of maintenance.

[0003] Furthermore, with the increasing complexity of motor control functions, control circuit boards are often integrated internally to achieve intelligent drive. In existing technologies, circuit boards are mostly fixed inside the motor by additional brackets, which takes up a lot of space, has a non-compact structure, and external cables usually need to pass through the wire holes on the end cover before connecting to the internal circuit. This method is not only inconvenient and inefficient in terms of wiring, but also easily damages internal components during repeated plugging and unplugging or maintenance. The sealing structure is also prone to failure due to repeated disassembly and assembly, making it difficult to meet the requirements of high protection levels. Summary of the Invention

[0004] To address the aforementioned issues, this invention solves the problems of low efficiency and easy failure of traditional threaded connections. While ensuring the overall structural stability after connection with external accessories, it achieves a base and end cap sealing structure and motor with efficient assembly and reliable sealing.

[0005] The technical solution adopted in this invention is: a base and end cap sealing structure, including a base, a shell, an outer end cap, an inner end cap, and a sealing element; the inner end cap is detachably disposed at a first end of the base, and a rotating connecting assembly is rotatably connected to a second end of the base opposite to the inner end cap, the rotating connecting assembly being connected to the shell; one end of the outer end cap is connected to the shell, and the other end is opposite to the inner end cap; the sealing element is disposed between the inner end cap and the outer end cap, sealing the inner end cap and the outer end cap relative to each other; a connecting buckle is provided at the end of the inner end cap facing the rotating connecting assembly, and an assembly groove is provided on the base to cooperate with the connecting buckle.

[0006] A further improvement to the above solution is that a mounting platform is provided on the side of the base near the inner end cover, and the mounting platform is used to mount the circuit board.

[0007] A further improvement to the above solution is that the circuit board is provided with a control connector, and the inner end cover is provided with a slot corresponding to the control connector for the wire end connector to be inserted into the control connector.

[0008] A further improvement to the above solution is that the control connector includes several pins, one end of which is fixed to the circuit board and the other end extends toward the slot.

[0009] A further improvement to the above solution is that a clearance groove is provided on one side of the base, the clearance groove is used to control the connector to avoid clearance, and a mating platform is provided on the inner end cover corresponding to the clearance groove, the mating platform surrounding the outer periphery of the slot.

[0010] A further improvement to the above solution is that the base is provided with a positioning groove, the inner end cover is provided with a positioning post, and the positioning groove is used for the positioning post to be installed and positioned; the end face of the base is provided with an assembly hole, and the inner end cover is provided with a matching hole, the matching hole corresponding to the assembly hole.

[0011] A further improvement to the above solution is that the side wall of the base is provided with an assembly slot, and multiple connecting buckles are provided and disposed on the outer periphery of the inner end cover. The connecting buckles are used to cooperate with the assembly slot to fix the inner end cover onto the base.

[0012] A further improvement to the above solution is that the outer periphery of the base is provided with a groove, the groove corresponding to the mounting slot, so that the base forms a thin wall at the position of the mounting slot.

[0013] A further improvement to the above solution is that a connecting buckle is provided between the outer end cover and the outer shell, and the connecting buckle is provided with a sealing ring for sealing between the outer end cover and the outer shell.

[0014] A further improvement to the above solution is that the sealing element is provided with a sealing outer lip, a V-groove is provided between the sealing outer lip and the sealing abutment ring, and an elastic expansion cavity is provided inside the sealing outer lip; the end of the sealing abutment ring is inclined toward the inner end cap.

[0015] An electric motor includes a base and an end cover sealing structure, wherein a stator assembly is disposed on the outside of the base near the rotating connection assembly, and a rotor assembly is installed inside the housing, the rotor assembly being opposite to the stator assembly.

[0016] The beneficial effects of this invention are:

[0017] Compared to existing motor end cover seals, this invention constructs multiple sealing barriers by setting an outer end cover, an inner end cover, and a sealing element located between them. The sealing abutment ring on the sealing element tightly abuts against the outer circumference of the inner end cover, forming a radial contact dynamic seal, effectively preventing external contaminants from entering the equipment and improving the reliability and service life of the seal. The inner end cover is directly set on the base, while the outer end cover simultaneously connects to the housing and clamps and fixes the sealing element. Integrating the rotary connection, end cover fixing, and sealing functions into a compact structural unit reduces the number of parts, simplifies the overall assembly structure, and facilitates the miniaturization and lightweight design of the equipment. The sealing element is placed on the sealing step of the outer end cover, ensuring accurate positioning and convenient installation. When the sealing element needs to be replaced due to wear and tear from long-term use, maintenance can be performed simply by disassembling the outer end cover, without the need for complex disassembly of the base, inner end cover, or rotary connection assembly, reducing the difficulty and time cost of subsequent maintenance. This invention is applicable to devices with rotating components (such as motors, pumps, reducers, etc.), and can effectively adapt to the slight radial runout and axial movement of the shaft system, maintaining stable sealing performance. It has a wide range of applications.

[0018] This invention utilizes a connecting snap-fit ​​structure on the inner end cover, allowing for direct snap-fit ​​fixation to the base, completely eliminating the tightening steps and screws required for traditional threaded connections. This simplifies the end cover assembly process, improves motor production efficiency, and avoids connection failures caused by thread stripping, corrosion, or improper torque, thus enhancing reliability. When external components are locked to the inner end cover and base, external forces are directly transmitted to the base through the inner end cover. The connecting snap-fit ​​primarily serves for initial positioning and pre-fixation, while the overall rigid structure formed by the locking of the base and inner end cover ultimately bears and distributes the main load. This ensures that even in motor applications subjected to large torque or vibration loads, the snap-fit ​​connection will not become a structural weakness. This invention solves the problems of low efficiency and easy failure of traditional threaded connections, achieving efficient assembly and reliable sealing while ensuring the overall structural stability after connection with external components.

[0019] A type of motor features pins mounted on the stator assembly support platform, with one end of each pin directly soldered to the circuit board. This eliminates potential failure points associated with traditional cable connections, such as connector interfaces, crimp points, or solder joints. The resulting metallurgical bond exhibits extremely low contact resistance and high mechanical strength, resulting in a shorter current transmission path, lower impedance, and lower losses. Simultaneously, it can withstand the intense vibrations and thermal cycling shocks generated during motor operation, fundamentally eliminating the risk of loose connections, poor contact, or wire breakage due to vibration, thus improving the long-term reliability and stability of the motor control circuit connection. By directly mounting the pins on the stator assembly support platform and soldering them directly to the circuit board, a highly integrated direct interconnection between the power system (stator) and the control system (circuit board) is achieved. This eliminates the need for additional wiring harnesses, connectors, and the space occupied by their mounting, resulting in an exceptionally compact internal structure and clear wiring, which is beneficial for the overall miniaturization and lightweight design of the motor. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the sealing structure of the base and end cap of the present invention; Figure 2 for Figure 1 Exploded view of the sealing structure between the middle base and the end cap; Figure 3 for Figure 1 An exploded view of the sealing structure between the central base and the end cap from another perspective; Figure 4 for Figure 1 Front view schematic diagram of the sealing structure between the middle base and the end cap; Figure 5 for Figure 4 Sectional view of AA; Figure 6 This is a schematic diagram of the internal structure of the motor of the present invention.

[0021] Explanation of reference numerals in the attached drawings: Base 1, Rotary connection assembly 11, Mounting platform 12, Clearance groove 13, Positioning groove 14, Assembly slot 141, Groove 15, Assembly hole 16, Outer shell 2, Outer end cover 3, Sealing step 31, Connecting buckle 32, Inner end cover 4, Slot 41, Mating platform 42, Positioning post 43, Connecting buckle 431, Alignment hole 44, Seal 5, Sealing abutment ring 51, Sealing outer lip 52, V-groove 521, Elastic telescopic cavity 522, Circuit board 6, Control connector 61, Pin 611, Stator assembly 7, Support platform 71, PIN pin 72, Rotor assembly 8. Detailed Implementation

[0022] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] like Figures 1-6 As shown, in one embodiment of the present invention, a base and end cap sealing structure is provided, including a base 1, a shell 2, an outer end cap 3, an inner end cap 4, and a sealing element 5. One end of the base 1 is provided with a rotary connecting assembly 11 for connecting the shell 2. The inner end cap 4 is provided at the end of the base 1 opposite to the rotary connecting assembly 11. The outer periphery of the outer end cap 3 is connected to the shell 2, and the inner periphery is opposite to the inner end cap 4, and a sealing step 31 is provided. The sealing element 5 is provided on the sealing step 31 and a sealing abutment ring 51 is provided. The inner periphery of the sealing abutment ring 51 is used to abut against the outer periphery of the inner end cap 4.

[0026] Furthermore, the seal can be formed on the outer circumference of the inner end cover or the inner circumference of the outer end cover through a secondary injection molding process, reducing the installation steps of the seal when assembling the motor.

[0027] This embodiment constructs multiple sealing barriers by setting an outer end cap 3, an inner end cap 4, and a sealing element 5 located between them. The sealing abutment ring 51 on the sealing element 5 tightly abuts against the outer periphery of the inner end cap 4, forming a radial contact dynamic seal, effectively preventing external contaminants from entering the equipment and improving the reliability and service life of the seal. The inner end cap 4 is directly set on the base 1, while the outer end cap 3 simultaneously connects to the outer shell 2 and presses and fixes the sealing element 5. Integrating the rotary connection, end cap fixing, and sealing functions into a compact structural unit reduces the number of parts, simplifies the overall assembly structure, and is conducive to the miniaturization and lightweight design of the equipment. The sealing element 5 is placed on the sealing step 31 of the outer end cap 3, ensuring accurate positioning and convenient installation. When the sealing element 5 needs to be replaced due to wear and tear from long-term use, maintenance can be performed simply by disassembling the outer end cap 3, without the need for complex disassembly of the base 1, inner end cap 4, or rotary connection assembly 11, reducing the difficulty and time cost of subsequent maintenance. This embodiment is applicable to devices with rotating parts (such as motors, pumps, reducers, etc.), and can effectively adapt to the slight radial runout and axial movement of the shaft system, maintain stable sealing performance, and has a wide range of applications.

[0028] See Figure 2 As shown, a mounting platform 12 is provided on the side of the base 1 near the inner end cover 4, and the mounting platform 12 is used to mount the circuit board 6. This embodiment achieves a high degree of functional integration of the structure by integrating the mounting platform 12 for mounting the circuit board 6 onto the base 1. This avoids the cumbersome additional mounting brackets and greatly simplifies the overall structural layout and assembly process. It not only saves internal space, making the structure more compact and facilitating equipment miniaturization, but also enhances the mounting rigidity and stability of the circuit board 6, effectively reducing connection loosening or component damage caused by vibration, and improving the overall reliability of the equipment.

[0029] See Figure 5 As shown, the circuit board 6 is equipped with a control connector 61, and the inner end cover 4 is provided with a slot 41 corresponding to the control connector 61 for insertion of the wire end connector and the control connector 61. This embodiment provides a channel for connecting external wiring harnesses to internal circuitry by creating a slot 41 on the inner end cover 4 that precisely corresponds to the control connector 61 on the circuit board 6. This achieves modularization and standardization of internal and external wiring. During equipment assembly or subsequent maintenance, operators can quickly insert the wire end connector and the control connector 61 through the slot 41 without disassembling the entire sealed structure, improving assembly efficiency and maintenance convenience. The structure of the slot 41 provides positioning and protection for the connection points, preventing damage to the connector due to pulling or accidental contact during wiring. Furthermore, after the wire end connector and the control connector 61 are inserted, UV adhesive is applied between them for sealing.

[0030] The control connector 61 includes a plurality of pins 611, one end of which is fixed to the circuit board 6 and the other end extends toward the slot 41. In this embodiment, by directly soldering one end of the pins 611 to the circuit board 6, a stable and reliable electrical and mechanical connection is established, avoiding the contact resistance and potential failure points that may be caused by using connectors, and improving the stability and durability of motor control signal transmission. When the inner end cover 4 is locked onto the base 1 by the connecting clip 431, the slot 41 precisely accommodates the control connector 61, exposing the other end (i.e., the plug end) of the pins 611 inside the slot 41. This allows the user to directly insert the wire end connector of the external wiring harness into the slot 41 from outside the motor when connecting the motor, thus achieving blind mating with the control connector 61. The entire process does not require disassembling the motor end cover, simplifying on-site wiring operations, improving installation efficiency, and effectively preventing damage or contamination to the internal circuitry that may be caused by repeated disassembly and reassembly of the end cover.

[0031] A clearance groove 13 is provided on one side of the base 1. The clearance groove 13 is used to control the connector 61 to avoid gaps. The inner end cover 4 is provided with a mating platform 42 corresponding to the clearance groove 13. The mating platform 42 surrounds the outer periphery of the slot 41. This embodiment solves the problem of internal space allocation and sealing isolation by setting the clearance groove 13 and the mating platform 42. The clearance groove 13 on the base 1 provides the necessary accommodation space for protruding components such as the connector 61, preventing them from interfering with the inner end cover 4 during assembly and ensuring smooth installation between components. The mating platform 42 of the inner end cover 4 is embedded in the clearance groove 13 area and tightly surrounds the outer periphery of the slot 41, structurally strengthening the rigidity of the slot 41 area.

[0032] The base 1 is provided with a positioning groove 14, and the inner end cover 4 is provided with a positioning post 43. The positioning groove 14 is used for the positioning post 43 to be installed and positioned. The end face of the base 1 is provided with an assembly hole 16, and the inner end cover 4 is provided with a matching hole 44, which corresponds to the assembly hole 16. In this embodiment, by using the cooperation of the positioning groove 14 and the positioning post 43, the rapid pre-positioning between the inner end cover 4 and the base 1 is achieved. Before tightening, the positioning post 43 can be inserted into the positioning groove 14 to automatically correct the circumferential and radial positions of the inner end cover 4, ensuring that the slot 41, matching hole 44 and other structures on it are completely aligned with the corresponding features on the base 1, eliminating the adjustment time during the assembly process and improving assembly efficiency and accuracy. At the same time, the assembly hole 16 and the matching hole 44 respectively provided on the base 1 and the inner end cover 4 are used for the fixed installation of the base 1.

[0033] The inner end cover 4 is provided with a weight reduction groove, which is used to reduce the weight of the inner end cover, thereby reducing the overall weight of the motor.

[0034] The positioning groove 14 has an assembly slot 141 on its wall surface, and the positioning post 43 has a connecting buckle 431 on its outer periphery. The connecting buckle 431 is used to cooperate with the assembly slot 141 to fix the positioning post 43 in place within the positioning groove 14. This embodiment adds a snap-fit ​​fixing function to the precise positioning, realizing a mechanical connection between the inner end cover 4 and the base 1. When the positioning post 43 is inserted into the positioning groove 14 and reaches the predetermined position, the connecting buckle 431 on the positioning post 43 will automatically engage with the assembly slot 141 on the groove wall. The connecting buckle 431 and the assembly slot 141 make the entire machine installation process more convenient, eliminating the need for screws. Simultaneously, it prevents the inner end cover 4 from misaligning or falling off due to accidental contact during handling or subsequent assembly operations, making the assembly process smoother and more reliable.

[0035] A groove 15 is provided on the outer periphery of the base 1, which corresponds to the mounting slot 141, so that the base 1 forms a thin wall at the position of the mounting slot 141. In this embodiment, by providing a groove 15 on the outer periphery corresponding to the mounting slot 141, the base 1 forms a thin-walled area with controllable elastic deformation capability at the snap-fit ​​connection. The thin-walled area can produce slight, controllable elastic deformation during the process of pressing the connecting snap 431 into the mounting slot 141, thereby reducing the insertion force required for snap-fit ​​engagement, making the assembly feel lighter and smoother, and improving the operating comfort. The groove can avoid some electronic components on the circuit board and makes the base form a raised ridge, on which the mounting hole 16 is located. The circuit board is adapted to the base, which can circumferentially limit the circuit board during installation.

[0036] A connecting buckle 32 is provided between the outer end cap 3 and the outer shell 2. The connecting buckle 32 is equipped with a sealing ring (not shown in the figure) for sealing between the outer end cap 3 and the outer shell 2. In this embodiment, the outer end cap 3 and the outer shell 2 are fixed by a buckle connection, making the installation of the outer end cap 3 simple and quick. No tools are required; locking or releasing can be completed simply by pressing or rotating, saving time and labor costs. The sealing ring integrated on the connecting buckle 32 is compressed when the outer end cap 3 and the outer shell 2 are fastened, immediately forming a reliable seal on the static mating surface of the outer end cap 3 and the outer shell 2, effectively preventing the intrusion of external contaminants.

[0037] See Figure 5As shown, the seal 5 is provided with a sealing outer lip 52, and a V-groove 521 is provided between the sealing outer lip 52 and the sealing abutment ring 51. An elastic expansion cavity 522 is provided inside the sealing outer lip 52; the end of the sealing abutment ring 51 is inclined towards the inner end cap 4. This embodiment improves its dynamic sealing performance and service life. The sealing outer lip 52 and its internal elastic expansion cavity 522 together constitute a sealing body with following and rebound capabilities, which can better compensate for the radial runout and wobble of the shaft and maintain stable sealing contact. The design of the V-groove 521 makes the sealing lip more flexible, easily forming an effective sealing line. Simultaneously, under the pressure of the working medium, the opening of the V-groove 521 tends to open, thereby enhancing the clamping force of the lip on the shaft and achieving a self-tightening sealing effect; the higher the pressure, the better the sealing effect.

[0038] An electric motor includes a base 1 and an end cover sealing structure. A stator assembly 7 is disposed on the outside of the base 1 near a rotating connection assembly 11. A rotor assembly 8 is installed inside a housing 2, with the rotor assembly 8 facing the stator assembly 7. This embodiment provides reliable protection for the motor: excellent dynamic sealing effectively prevents external contaminants such as moisture, dust, and oil from entering the motor, improving the motor's reliability and service life in harsh environments (such as humid, dusty, and outdoor conditions). The integrated design (such as the built-in circuit board 6 mounting base 12 and convenient wiring methods) simplifies the motor's internal structure and assembly process, facilitating miniaturization and high performance. The quick-connect snap-fit ​​design also greatly facilitates on-site installation and subsequent maintenance, making this motor particularly suitable for industrial drives, new energy vehicles, and automated equipment fields with high requirements for reliability, ease of maintenance, and environmental adaptability.

[0039] In the above embodiments, see Figure 6 As shown, a PIN pin 72 is provided on the support platform 71 of the stator assembly 7, with one end of the PIN pin 72 directly soldered to the circuit board 6. This eliminates potential fault points such as connector interfaces, crimp points, or solder joints present in traditional cable connection methods. The metal-metallic bond formed by welding has extremely low contact resistance and extremely high mechanical strength, resulting in a shorter current transmission path, lower impedance, and lower losses. Simultaneously, it can withstand the strong vibrations and thermal cycling shocks generated during motor operation, fundamentally eliminating the risk of loose connections, poor contact, or wire breakage caused by vibration, thus improving the long-term reliability and stability of the motor control circuit connection. By directly setting the PIN pin 72 on the support platform 71 of the stator assembly 7 and directly soldering it to the circuit board 6, a highly integrated direct interconnection between the power system (stator) and the control system (circuit board 6) is achieved. This eliminates the need for additional connecting harnesses, connectors, and the space occupied by their fixing, resulting in a compact internal structure and clear wiring of the motor, which is beneficial for the overall miniaturization and lightweight design of the motor.

[0040] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A base and end cap sealing structure, characterized in that: The system includes a base, a housing, an outer end cap, an inner end cap, and a sealing element. The inner end cap is detachably mounted on a first end of the base. A rotating connecting assembly is rotatably connected to a second end of the base opposite to the inner end cap, and the rotating connecting assembly is connected to the housing. One end of the outer end cap is connected to the housing, and the other end is opposite to the inner end cap. The sealing element is disposed between the inner end cap and the outer end cap, sealing the inner end cap and the outer end cap. A connecting buckle is provided on the end of the inner end cap facing the rotating connecting assembly, and the base is provided with an assembly groove that mates with the connecting buckle.

2. The base and end cap sealing structure according to claim 1, characterized in that: A mounting platform is provided on the side of the base near the inner end cover. The mounting platform is used to mount the circuit board. The circuit board is provided with a control connector. The inner end cover is provided with a slot corresponding to the control connector for the wire end connector to be inserted into the control connector.

3. The base and end cap sealing structure according to claim 2, characterized in that: The control connector includes several pins, one end of which is fixed to the circuit board and the other end extends toward the slot.

4. The base and end cap sealing structure according to claim 2, characterized in that: A clearance groove is provided on one side of the base, which is used to control the clearance of the connector. A mating platform is provided on the inner end cover corresponding to the clearance groove, and the mating platform surrounds the outer periphery of the slot.

5. The base and end cap sealing structure according to claim 1, characterized in that: The base is provided with a positioning groove, and the inner end cover is provided with a positioning post. The positioning groove is used for the positioning post to be installed and positioned. The end face of the base is provided with an assembly hole, and the inner end cover is provided with a matching hole, which corresponds to the assembly hole.

6. The base and end cap sealing structure according to claim 1, characterized in that: The base has an assembly slot on its side wall, and multiple connecting buckles are provided on the outer periphery of the inner end cover. The connecting buckles are used to cooperate with the assembly slot to fix the inner end cover onto the base.

7. The base and end cap sealing structure according to claim 6, characterized in that: The base has a groove on its outer periphery, which corresponds to the mounting slot, so that the base forms a thin wall when it is located at the mounting slot.

8. The base and end cap sealing structure according to claim 1, characterized in that: A connecting buckle is provided between the outer end cover and the outer shell, and the connecting buckle is provided with a sealing ring for sealing between the outer end cover and the outer shell.

9. The base and end cap sealing structure according to claim 1, characterized in that: The sealing element is provided with a sealing lip, and a V-groove is provided between the sealing lip and the sealing abutment ring. An elastic expansion cavity is provided inside the sealing lip. The end of the sealing abutment ring is radially inclined toward the outer periphery of the inner end cover.

10. An electric motor, characterized in that: The base and end cap sealing structure includes any one of claims 1 to 9, wherein a stator assembly is disposed on the outside of the base near the rotary connection assembly, and a rotor assembly is installed inside the housing, the rotor assembly being opposite to the stator assembly; the stator assembly is provided with a support platform for supporting a circuit board, and a PIN pin is disposed on the support platform, the PIN pin being soldered to the circuit board.

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