High-efficiency corrosion-resistant stepping motor

Abstract

The invention relates to the technical field of motors, in particular to an efficient corrosion-resistant stepping motor which comprises a main shell, a power connection assembly, a sealing assembly, a speed reduction unit, a stator sleeve and a rotor, and the stator sleeve and the rotor are located on the inner side of the main shell. The rotor rotates at a high speed through the electromagnetic coil under the action of alternating current, and kinetic energy is transmitted to the speed reduction unit through the rotating shaft. The speed reduction unit comprises a fixed disc seat, a harmonic wheel and a speed reduction rotary disc, high-precision speed reduction transmission is achieved through cooperation of the harmonic wheel and the eccentric shaft, and low-speed large torque is output to the output shaft. The sealing assembly is composed of a shaft sleeve base, a mechanical seal and a movable sealing ring, the sealing performance is improved and the service life is prolonged by combining the design of a lubricating grease cavity. And the main shell, the sealing cover and the output shaft are all made of corrosion-resistant metal materials and are coated with epoxy resin or polyurethane corrosion-resistant coatings, so that the durability of the motor in a high-humidity and high-corrosion environment is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and specifically to an efficient corrosion-resistant stepper motor. Background Art

[0002] Traditional stepper motors generally include a housing, a stator, a rotor, and a corresponding power connection component and output structure. Usually, the stator and rotor are arranged inside the housing. A current is supplied to the stator through the power connection component to drive the rotor to rotate, and the torque is transmitted to an external device through an output shaft. Such traditional stepper motors usually form a simple seal between the housing and the output shaft through a sealing ring or gasket. The reduction mechanism is mostly an external structure, separated from the main housing and installed, and relies on external lubrication and independent protection measures to meet the operating requirements.

[0003] Although traditional stepper motors can meet the requirements of conventional industrial control, they have the following defects in terms of sealing and corrosion resistance: Insufficient sealing protection: The sealing structure between the housing and the output shaft of traditional stepper motors is usually relatively simple and cannot completely isolate external dust, moisture, and corrosive media, resulting in key components such as the stator and rotor inside the motor being easily eroded, reducing the protection level and service life of the equipment.

[0004] Poor corrosion resistance: Key components such as the housing and output shaft are mostly made of ordinary metal materials and their surfaces are not specially treated against corrosion. They are prone to corrosion in high-humidity or corrosive environments, affecting the reliability and performance of the motor.

[0005] Unreasonable structural design: The reduction mechanism is usually an external structure, occupying a large installation space and requiring additional sealing and lubrication protection measures. This not only increases the equipment volume and installation complexity but also increases the overall system maintenance cost and failure risk.

[0006] Limited operating efficiency: The design in traditional reduction mechanisms is mostly gear transmission, which is difficult to meet the requirements of high-precision motion control. At the same time, the operating stability of the equipment is reduced due to high friction losses.

[0007] Therefore, in view of the deficiencies of traditional stepper motors in terms of sealing, corrosion resistance, structural compactness, and operating efficiency, a technical solution that can effectively solve the above problems is urgently needed to meet the requirements of high efficiency and high reliability of stepper motors in complex industrial environments. Summary of the Invention

[0008] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0009] For this purpose, the technical solution adopted by the present invention is as follows: An efficient corrosion-resistant stepper motor, comprising: a main housing, a power connection assembly, a sealing assembly, a speed reduction unit, and a stator sleeve and a rotor located inside the main housing. A rotating shaft is provided on the surface of the rotor. The rotor is rotatably installed inside the stator sleeve, and the stator sleeve is fixed inside the main housing; The power connection assembly includes a wiring pipe rod penetrating to the inside of the main housing and a PCB driving board fixed on the surface of the wiring pipe rod. The PCB driving board is used for current input to the rotor; A number of permanent magnet blocks arranged in a circumferential direction are provided inside the stator sleeve; The speed reduction unit includes a fixed disk seat, a harmonic gear, and a speed reduction turntable. An eccentric shaft is provided on the surface of the rotating shaft, and the harmonic gear is rotatably sleeved on the eccentric shaft; A number of corrugated grooves are formed inside the fixed disk seat, and balls abuting against the outer circumference of the harmonic gear are arranged in each corrugated groove. A slot is provided on one side of the speed reduction turntable and sleeved on the surface of the balls. The speed reduction turntable is rotatably installed inside the fixed disk seat. An output shaft is fixedly installed on the surface of the speed reduction turntable, and the output shaft is rotatably sleeved and penetrates through the inside of the sealing assembly; The sealing assembly includes a shaft sleeve seat and a bearing ring, a dynamic sealing ring, and a mechanical seal located inside the shaft sleeve seat. A flange gland fixedly connected to one side of the shaft sleeve seat is rotatably sleeved on the outside of the output shaft.

[0010] In a possible implementation manner, the main housing and the cover are hermetically connected. The wiring pipe rod and the shaft sleeve seat are respectively fixed on the surfaces of the main housing and the cover. The main housing, the cover, and the output shaft are all made of corrosion-resistant metal materials.

[0011] In a possible implementation manner, a number of electromagnetic coils are provided on the surface of the rotor. The electromagnetic coils are electrically connected to the output end of the PCB driving board. The rotor rotates at a high speed under the guidance of the permanent magnet blocks inside the stator sleeve under the action of an alternating current being passed through, and rotational kinetic energy is output through the rotating shaft.

[0012] In a possible implementation manner, the axis of the eccentric shaft deviates from the axis of the rotating shaft. A bearing sleeved on the inside of the harmonic gear is provided on the outside of the eccentric shaft. One end of the rotating shaft is rotatably sleeved inside the speed reduction turntable and the output shaft.

[0013] In a possible implementation manner, the rotor, the stator sleeve, the rotating shaft, the speed reduction turntable, and the output shaft are all coaxially arranged to improve the operation stability and sealing performance of the device.

[0014] In a possible implementation, the mechanical seal has a double-layer ceramic structure. The inner layer is silicon carbide ceramic, and the outer layer is alumina ceramic coated with boron nitride. The dynamic seal ring is made of modified PEEK material and has a circumferential corrugated groove on its surface. Three stepped sealing rings with different hardnesses are provided between the shaft sleeve seat and the flange gland to form a multi-stage barrier sealing structure.

[0015] In a possible implementation, the outer surfaces of the main housing and the cover are both coated with an anti-corrosion coating. The anti-corrosion coating is a multi-layer composite protection structure, and a micro corrosion sensing module is provided at the connection part between the main housing and the cover. This module is connected to the PCB driving board and is used to detect the protection status in real time and issue a corrosion warning.

[0016] In a possible implementation, the output shaft realizes dynamic sealing with the surface of the cover through a sealing assembly. There is a grease chamber between the dynamic seal ring and the bearing ring of the sealing assembly, which is used to extend the service life of the sealing assembly and improve its corrosion resistance.

[0017] Based on the above technical solutions, an efficient and corrosion-resistant stepping motor of the present invention, through the sealing structure design of the main housing and the cover, highly integrates the power connection component, the stator sleeve, the rotor and the reduction gear set in a closed space, and by optimizing the materials and structures of the sealing assembly, effectively avoids the erosion of the internal structure of the motor by external dust, moisture and corrosive media, and significantly improves the sealing performance and long-term reliability of the equipment. In addition, the main housing, the cover and the output shaft are all made of corrosion-resistant materials, and combined with an anti-corrosion system of nano-ceramic conversion, graphene enhancement and self-repairing coating technologies, further enhances the durability of the motor in high-humidity and highly corrosive environments, so as to meet the requirements for the high efficiency and high reliability of the motor in complex industrial environments.

[0018] The beneficial effects achieved by the present invention are as follows: 1. In the present invention, through the sealed connection between the main housing and the cover, the power connection component, the stator sleeve, the rotor and the reduction gear set are highly integrated in a closed space, avoiding the erosion of the internal structure of the motor by dust, moisture and corrosive media in the external environment, thereby significantly improving the protection level and long-term reliability of the equipment.

[0019] 2. In the present invention, the mechanical seal has a double-layer ceramic structure, combined with a sealing structure composed of a modified PEEK dynamic seal ring and multi-stage sealing rings, effectively improves the high-temperature resistance, corrosion resistance and dynamic sealing performance, and cooperates with the grease chamber to further extend the service life of the sealing assembly and improve the working stability of the motor in high-humidity and highly corrosive environments.

[0020] 3. In the present invention, an eccentric shaft is provided on the surface of the rotating shaft, and the axis of the eccentric shaft is offset from the axis of the rotating shaft by a certain distance. When the rotating shaft rotates at a high speed, the eccentric shaft drives the harmonic gear to generate periodic elastic deformation within the fixed disk seat. A number of corrugated grooves are provided within the fixed disk seat, and balls are embedded in the corrugated grooves. The outer circumference of the harmonic gear abuts against the balls to achieve rolling friction transmission. The movement of the balls is further transmitted through the speed reduction turntable, and the speed reduction turntable finally transmits the torque to the output shaft, achieving the speed reduction and torque increase effect of speed reduction transmission.

[0021] In summary, through the compact structural design and excellent material selection of the present invention, not only the sealing performance and corrosion resistance of the stepping motor are improved, but also the adaptability of the equipment in complex industrial environments is significantly enhanced. The efficient and corrosion-resistant performance characteristics enable it to be widely applied to precision motion control scenarios in ocean engineering, chemical equipment, and other corrosive environments, and have high industrial value and market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is a schematic diagram of the cross-sectional structure of an embodiment of the present invention; Figure 3 is a schematic diagram of the exploded structure of an embodiment of the present invention; Figure 4 is a schematic diagram of the speed reduction unit structure of an embodiment of the present invention; Figure 5 is a schematic diagram of the internal structure of the fixed disk seat of an embodiment of the present invention; Figure 6 is a schematic diagram of the speed reduction unit and the seal assembly structure of an embodiment of the present invention; Figure 7 is a schematic diagram of the exploded structure of the speed reduction unit of an embodiment of the present invention; Figure 8 is a schematic diagram of the cross-sectional structure of the seal assembly of an embodiment of the present invention.

[0024] REFERENCE NUMERALS: 100, main housing; 110, stator sleeve; 120, rotor; 101, cover; 121, rotating shaft; 122, eccentric shaft; 200, power connection assembly; 210, wiring pipe rod; 220, PCB drive board; 300, seal assembly; 310, bushing seat; 320, mechanical seal; 330, dynamic seal ring; 311, flange compression sleeve; 312, bearing ring; 400, speed reduction unit; 410, fixed disk seat; 420, harmonic gear; 430, speed reduction turntable; 431, output shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions and advantages of the present invention clearer and more explicit, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention.

[0027] The following describes a highly efficient corrosion-resistant stepper motor provided by some embodiments of the present invention in conjunction with the accompanying drawings.

[0028] Combined Figures 1 to 8 As shown, the present invention provides a highly efficient corrosion-resistant stepper motor, including: a main housing 100, a power connection assembly 200, a sealing assembly 300, a speed reduction unit 400, and a stator sleeve 110 and a rotor 120 located inside the main housing 100.

[0029] A rotating shaft 121 is provided on the surface of the rotor 120. The rotor 120 is rotatably mounted inside the stator sleeve 110 through a bearing ring 312. The stator sleeve 110 is fixed inside the main housing 100 and is used to limit the rotation range of the rotor 120 and improve the structural stability. A plurality of permanent magnetic blocks are uniformly arranged along the circumferential direction inside the stator sleeve 110 and are used to form a magnetic field to guide the rotor 120 to rotate at a high speed inside.

[0030] The power connection assembly 200 includes a wiring pipe rod 210 penetrating to the inside of the main housing 100 and a PCB drive board 220 fixed on the surface of the wiring pipe rod 210. The PCB drive board 220 is electrically connected to an electromagnetic coil provided on the surface of the rotor 120 and is used to provide an alternating current for the rotor 120 to form a torque under the guidance of the magnetic field of the permanent magnetic blocks, thereby realizing the high-speed rotation of the rotor 120 and outputting kinetic energy through the rotating shaft 121.

[0031] The speed reduction unit 400 is used to convert the kinetic energy of high-speed rotation into low-speed and high-torque output. As Figures 3 to 7 shown, the speed reduction unit 400 includes a fixed disk seat 410, a harmonic gear 420, and a reduction turntable 430. An eccentric shaft 122 is provided on the surface of the rotating shaft 121. The axis of the eccentric shaft 122 deviates from the axis of the rotating shaft 121, and a bearing is provided on its outer side. The harmonic gear 420 is rotatably sleeved on the eccentric shaft 122, and the rotation of the rotating shaft 121 drives the harmonic gear 420 to generate periodic elastic deformation.

[0032] A number of corrugated grooves are provided inside the stator base 410. Ball bearings that abut against the outer circumference of the harmonic gear 420 are embedded in the corrugated grooves. The reduction turntable 430 is provided with a slot that is sleeved on the surface of the ball bearings and is rotatably installed inside the stator base 410 to achieve speed reduction under the action of rolling friction. An output shaft 431 is fixedly installed on the surface of the reduction turntable 430. The output shaft 431 penetrates through the sealing assembly 300 and is used to output the reduced torque.

[0033] To ensure the sealing and reliability of the motor in a corrosive environment, as Figure 8 shown, the sealing assembly 300 includes a sleeve seat 310, and a bearing ring 312, a dynamic seal ring 330, and a mechanical seal 320 provided inside the sleeve seat 310. The output shaft 431 passes through the inside of the sealing assembly 300 and is fixedly connected to one side of the sleeve seat 310 through a flange bushing 311.

[0034] Different from the prior art, the mechanical seal 320 adopts a double-layer ceramic structure. The inner layer is silicon carbide ceramic, and the outer layer is alumina ceramic coated with boron nitride microfilm, which has excellent corrosion resistance, temperature resistance, and anti-particle erosion ability. The dynamic seal ring 330 is made of modified PEEK material, and a ring corrugated groove structure is provided on its surface, which can improve the fitting degree and seal response efficiency between the dynamic seal ring 330 and the bearing ring 312.

[0035] In addition, three stepped sealing rings with different hardnesses are provided between the sleeve seat 310 and the flange bushing 311 to form a multi-stage barrier sealing structure, which improves the reliability of axial and radial sealing and significantly enhances the sealing protection ability of the stepper motor in a high-humidity and strong-corrosion environment.

[0036] The main housing 100 and the cover 101 are hermetically connected to form a complete cavity. The wiring pipe rod 210 and the sleeve seat 310 are respectively installed outside the main housing 100 and the cover 101. The main housing 100, the cover 101, and the output shaft 431 are all made of highly corrosion-resistant metals such as 316L stainless steel, nickel-based alloy, or copper alloy.

[0037] To further enhance the corrosion resistance, the outer surfaces of the main housing 100 and the cover 101 are sequentially provided with a three-layer composite anti-corrosion coating system composed of a nano-ceramic conversion coating layer, a graphene-reinforced epoxy resin intermediate layer, and a self-healing fluorosilicon coating. Among them: The nano-ceramic conversion coating layer improves the adhesion of the substrate and the initial corrosion resistance; The graphene-reinforced layer can prevent the propagation of microcracks and improve the overall anti-corrosion durability; The fluorosilicon surface layer has self-healing ability and can automatically close the coating film after minor damage.

[0038] In addition, a micro corrosion sensing module is provided in the connection area between the main housing 100 and the cover 101. This module is connected to the PCB driving board 220 to collect the changes in micro current or resistance in real time, which is used to monitor the corrosion trend of the protective layer and issue a maintenance warning through the electronic system.

[0039] To improve the overall operation accuracy and reliability, the rotor 120, stator sleeve 110, rotating shaft 121, reduction turntable 430, and output shaft 431 are all arranged coaxially, reducing internal friction losses and improving the system operation efficiency and control accuracy. The reduction link is composed of a combination of a harmonic gear 420 and an eccentric shaft 122 to form a high-precision and miniaturized harmonic reduction structure, which is suitable for industrial or intelligent equipment scenarios with compact space and high requirements for control accuracy.

[0040] Through the description of the above specific implementation manners, the high-efficiency corrosion-resistant stepping motor of the present invention has been significantly improved in terms of sealing performance, corrosion resistance, structural compactness, and operation stability, and can be widely applied to precision motion control scenarios in ocean engineering, chemical equipment, and other highly corrosive environments.

[0041] The working principle and usage process of the present invention: A high-efficiency corrosion-resistant stepping motor of the present invention realizes the functions of high sealing performance, high corrosion resistance, and high precision through structural optimization and material selection. Its specific working principle is as follows: 1. The current drives the rotor 120 to rotate The power connection component 200 transmits the current to the PCB driving board 220 through the wiring pipe rod 210, and the PCB driving board 220 provides an alternating current for the electromagnetic coil on the rotor 120. After the electromagnetic coil is energized, an alternating magnetic field is generated. Under the guidance of the permanent magnet blocks in the stator sleeve 110, the rotor 120 rotates at a high speed under the action of the magnetic field force.

[0042] 2. The kinetic energy of the rotor 120 is transmitted to the rotating shaft 121 The rotational kinetic energy of the rotor 120 is transmitted to the external structure through the rotating shaft 121 fixed on its surface. The rotating shaft 121 also serves as the power input component connecting the reduction gear unit 400.

[0043] 3. Harmonic reduction drive An eccentric shaft 122 is provided on the surface of the rotating shaft 121, and the axis of the eccentric shaft 122 is offset from the axis of the rotating shaft 121 by a certain distance. When the rotating shaft 121 rotates at a high speed, the eccentric shaft 122 drives the harmonic gear 420 to generate periodic elastic deformation in the fixed disk seat 410. A number of corrugated grooves are provided in the fixed disk seat 410, and balls are embedded in the corrugated grooves. The outer circumference of the harmonic gear 420 abuts against the balls to achieve rolling friction drive. The movement of the balls is further transmitted through the reduction turntable 430, and the reduction turntable 430 finally transmits the torque to the output shaft 431, achieving the reduction drive effect of reducing the speed and increasing the torque.

[0044] 4. The sealing assembly 300 ensures internal protection The output shaft 431 penetrates through the sealing assembly 300. The sealing assembly 300 consists of a sleeve seat 310, a bearing ring 312, a dynamic sealing ring 330, and a mechanical seal 320 to form a complete sealing structure, preventing moisture, dust, and corrosive media in the external environment from invading the interior of the motor.

[0045] The dynamic sealing ring 330 is made of polytetrafluoroethylene material, and there is a grease chamber between it and the bearing ring 312. The grease chamber reduces the friction between rotating parts and improves the sealing performance at the same time.

[0046] The mechanical seal 320 uses a ceramic material that is resistant to high temperatures and corrosion, ensuring the long-term stable operation of the motor in harsh environments.

[0047] 5. High corrosion-resistant materials ensure external protection The main housing 100, the cover 101, and the output shaft 431 are all made of corrosion-resistant metal materials, and an anti-corrosion coating such as an epoxy resin coating or a polyurethane coating is applied to their surfaces. This design significantly improves the durability and reliability of the motor in high-humidity, high-salt spray, and high-corrosion environments.

[0048] 6. High-precision motion control The rotor 120, the stator sleeve 110, the rotating shaft 121, the reduction turntable 430, and the output shaft 431 are coaxially arranged, reducing the friction and deviation between rotating parts and improving the operation stability. At the same time, the eccentric shaft 122 and the harmonic gear 420 in the harmonic reduction mechanism cooperate to achieve high-precision reduction drive, meeting the requirements for precision motion control in the industrial field.

[0049] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0050] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An efficient corrosion-resistant stepper motor, characterized in that, Comprising: A main housing (100), a power connection assembly (200), a sealing assembly (300), a speed reduction unit (400), and a stator sleeve (110) and a rotor (120) located inside the main housing (100). A rotating shaft (121) is provided on the surface of the rotor (120). The speed reduction unit (400) includes a fixed disk seat (410), a harmonic gear (420), and a speed reduction turntable (430). An eccentric shaft (122) is provided on the surface of the rotating shaft (121), and the harmonic gear (420) is rotatably sleeved on the eccentric shaft (122). A plurality of corrugated grooves are formed inside the fixed disk seat (410), and balls that abut against the outer circumference of the harmonic gear (420) are provided in each corrugated groove. A slot is provided on one side of the speed reduction turntable (430) and is sleeved on the surface of the balls. The speed reduction turntable (430) is rotatably installed inside the fixed disk seat (410). An output shaft (431) is fixedly installed on the surface of the speed reduction turntable (430), and the output shaft (431) is rotatably sleeved and penetrates through the inside of the sealing assembly (300). The sealing assembly (300) includes a bushing seat (310) and a bearing ring (312), a dynamic seal ring (330), and a mechanical seal (320) located inside the bushing seat (310). A flange bushing (311) that is rotatably sleeved on the outside of the output shaft (431) is fixedly connected to one side of the bushing seat (310).

2. The high-efficiency corrosion-resistant stepper motor according to claim 1, characterized in that, The power connection assembly (200) includes a wiring pipe rod (210) that penetrates to the inside of the main housing (100) and a PCB drive board (220) fixed to the surface of the wiring pipe rod (210). The PCB drive board (220) is used to provide current input to the rotor (120).

3. An efficient corrosion-resistant stepper motor according to claim 2, characterized in that, The main housing (100) and the cover (101) are hermetically connected. The wiring pipe rod (210) and the bushing seat (310) are respectively fixed to the surfaces of the main housing (100) and the cover (101). The main housing (100), the cover (101), and the output shaft (431) are all made of corrosion-resistant metal materials.

4. An efficient corrosion-resistant stepping motor according to claim 2, characterized in that, A plurality of electromagnetic coils are provided on the surface of the rotor (120). The electromagnetic coils are electrically connected to the output end of the PCB drive board (220). After an alternating current is passed through the rotor (120), it rotates at a high speed under the guidance of the permanent magnet blocks in the stator sleeve (110), and rotational kinetic energy is output through the rotating shaft (121).

5. An efficient corrosion-resistant stepping motor according to claim 1, characterized in that, The axis of the eccentric shaft (122) is offset from the axis of the rotating shaft (121). A bearing sleeved on the outside of the eccentric shaft (122) is provided inside the harmonic gear (420). One end of the rotating shaft (121) is rotatably sleeved inside the speed reduction turntable (430) and the output shaft (431).

6. An efficient corrosion-resistant stepper motor according to claim 1, characterized in that, The rotor (120) is rotatably installed inside the stator sleeve (110), and the stator sleeve (110) is fixed inside the main housing (100). A plurality of permanent magnet blocks arranged in a circumferential direction are provided inside the stator sleeve (110). The rotor (120), the stator sleeve (110), the rotating shaft (121), the speed reduction turntable (430), and the output shaft (431) are all coaxially arranged.

7. An efficient corrosion-resistant stepper motor according to claim 1, characterized in that, The mechanical seal (320) has a double-layer ceramic structure. The inner layer is made of silicon carbide ceramic, and the outer layer is alumina ceramic coated with boron nitride. The dynamic seal ring (330) is made of modified PEEK material and is provided with annular corrugated grooves on its surface. Three stepped sealing rings with different hardnesses are arranged between the shaft sleeve seat (310) and the flange bushing (311) to form a multi-stage barrier sealing structure.

8. An efficient corrosion-resistant stepper motor according to claim 1, characterized in that, The outer surfaces of the main housing (100) and the cover (101) are successively provided with a three-layer composite anti-corrosion coating composed of a nano-ceramic conversion bottom layer, a graphene-reinforced epoxy resin intermediate layer, and a self-healing fluorosilicon surface layer. A micro corrosion sensing module is arranged at the connection between the main housing (100) and the cover (101), and is connected to the PCB driving board (220) for real-time detection of the protection status and issuing corrosion warnings.

9. An efficient corrosion-resistant stepper motor according to claim 1, wherein, The output shaft (431) realizes dynamic sealing with the surface of the cover (101) through the sealing assembly (300). A grease chamber is arranged between the dynamic seal ring (330) and the bearing ring (312) of the sealing assembly (300).

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