Motor end cover sealing mechanism

Abstract

This utility model relates to the field of motor technology, specifically a motor end cover sealing mechanism, including a base, an end cover, and a housing. The base has a connecting step, on which a first rotary connecting element is mounted. The end cover has an inner connecting ring and an outer connecting ring. The inner connecting ring connects to the first rotary connecting element, and the outer connecting ring connects to the housing. The connecting step has a first sealing ring, which seals against the inner diameter of the first rotary connecting element. The inner connecting ring has a second sealing ring, which seals against the outer diameter of the connecting element. The outer connecting ring has a third sealing ring, which seals against the inner diameter of the housing. This utility model comprehensively protects the internal structure of the motor from external interference, ensuring normal and efficient operation of the motor in various complex environments, and improving the motor's adaptability to different working environments.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor end cover sealing mechanism. Background Technology

[0002] External rotor motors, as a type of power equipment widely used in many fields such as industry and home appliances, play an important role in modern production and life. However, current external rotor motors still face some problems that urgently need to be solved in practical applications. The assembly process of the end caps of existing external rotor motors is often quite inconvenient. Traditional assembly methods involve multiple complex steps, requiring workers to precisely align multiple components. Even slight deviations can affect the overall performance of the motor, resulting in low assembly efficiency and increased production cycle and cost.

[0003] Poor sealing is also a prominent problem with existing external rotor motor end covers. Inadequate sealing allows dust, moisture, and other impurities to easily enter the motor, accelerating the wear of internal components and potentially causing electrical faults, severely impacting the motor's lifespan and stability. This problem is particularly acute in demanding applications such as outdoor robotics. Therefore, a new design for the existing motor sealing structure is necessary. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides comprehensive protection for the internal structure of the motor from external interference, ensuring normal and efficient operation of the motor in various complex environments and improving its adaptability to different working conditions. It also enhances the sealing performance, stability, and durability of the motor's end cover sealing mechanism.

[0005] The technical solution adopted by this utility model is as follows: a motor end cover sealing mechanism, including a base, an end cover, and a housing. The base is provided with a connecting step, and a first rotating connecting element is provided on the connecting step. The end cover is provided with a connecting inner ring and a connecting outer ring. The connecting inner ring is connected to the first rotating connecting element, and the connecting outer ring is connected to the housing. The connecting step is provided with a first sealing ring, which seals against the inner diameter of the first rotating connecting element. The connecting inner ring is provided with a second sealing ring, which seals against the outer diameter of the connecting element. The connecting outer ring is provided with a third sealing ring, which seals against the inner diameter of the housing.

[0006] A further improvement to the above solution is that one end of the base is provided with a connecting part, the end cap is provided with a through hole, and the connecting part passes through and extends to the outside of the through hole.

[0007] A further improvement to the above scheme is that the connecting step is located on the lower side of the connecting part, and the connecting inner ring is provided with a mating step opposite to the connecting step. The mating step and the connecting step fix the inner diameter and outer diameter of the first rotating connecting element, respectively.

[0008] A further improvement to the above scheme is that the outer diameter of the connecting inner ring is provided with an inclined surface, the base is provided with a groove on the lower side of the connecting step, and one end of the connecting inner ring extends toward the groove.

[0009] A further improvement to the above solution is that the wall surface of the connecting step is provided with a first sealing groove, the first sealing ring is disposed in the first sealing groove, the inner connecting ring is provided with a second sealing groove, the second sealing ring is disposed in the second sealing groove, and the outer connecting ring is provided with a third sealing groove, the third sealing ring is disposed in the third sealing groove.

[0010] A further improvement to the above solution is that the end face of the outer shell is provided with a connecting hole, the end cap is provided with a countersunk hole, and a screw is provided in the countersunk hole to connect with the connecting hole.

[0011] A further improvement to the above solution is that it also includes a tail cover plate, the base is provided with a tail connecting seat, the tail connecting seat is provided with a second rotary connecting element, the tail cover plate is provided with a tail connecting ring, the second rotary connecting element is used to connect the tail connecting seat and the tail connecting ring; the outer shell is provided with a reinforcing ring, the reinforcing ring is used to connect the tail cover plate.

[0012] A further improvement to the above solution is that the tail connector is provided with a fourth sealing ring and a fifth sealing ring. The fourth sealing ring is used to abut against the inner diameter of the second rotary connecting element, and the fifth sealing ring is used to seal the end of the rotary connecting element.

[0013] A further improvement to the above scheme is that the tail connecting ring is provided with a sixth sealing ring, which is used to seal the outer diameter of the second rotating connecting element.

[0014] A further improvement to the above solution is that a seventh sealing ring is provided on the bottom surface of the reinforcing ring, and the seventh sealing ring is used to seal against the tail cover plate.

[0015] The beneficial effects of this utility model are:

[0016] Compared to existing motor end cover seals, this invention, by setting a connecting step on the base and equipping it with a first rotating connecting element, and connecting the inner ring of the end cover to the first rotating connecting element, ensures a stable and flexible rotating connection between the end cover and the base. This provides a fundamental guarantee for the rational layout and operation of the motor's internal components, and helps optimize the compactness and stability of the overall motor structure. The first sealing ring at the connecting step, which seals against the inner diameter of the first rotating connecting element, effectively prevents external dust, moisture, and other impurities from entering the motor through the connection gap between the base and the first rotating connecting element. This provides excellent protection for the precision components inside the motor, significantly improving the cleanliness of the motor's operating environment, reducing the failure rate caused by impurities, and extending the motor's service life. The second sealing ring on the inner ring, which seals against the outer diameter of the connecting element, further enhances the sealing between the end cover and the connecting structure, preventing internal gas leakage and the penetration of foreign objects during motor operation. This ensures stable internal air pressure, reduces the adverse effects of air pressure changes on motor performance, and improves the stability and reliability of motor operation. A third sealing ring is installed on the connecting outer ring and seals against the inner diameter of the outer casing, thus perfecting the entire sealing system. This creates a reliable sealing barrier between the motor end cover and the outer casing, providing comprehensive protection for the internal structure of the motor from external interference. This ensures the motor operates normally and efficiently in various complex environments, improving its adaptability to different working conditions. This invention enhances the sealing performance, stability, and durability of the motor. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the motor end cover sealing mechanism of this utility model;

[0018] Figure 2 for Figure 1 Exploded view of the sealing mechanism of the motor end cover;

[0019] Figure 3 for Figure 1 An exploded view of the sealing mechanism of the motor end cover from another perspective;

[0020] Figure 4 for Figure 1 Front view schematic diagram of the sealing mechanism of the motor end cover;

[0021] Figure 5 for Figure 4 Sectional view of AA.

[0022] Explanation of reference numerals in the attached drawings: Base 1, Connecting step 11, First sealing ring 111, First rotary connecting element 12, Connecting part 13, Countersunk groove 14, Tail connecting seat 15, Second rotary connecting element 151, End cap 2, Connecting inner ring 21, Second sealing ring 211, Mating step 212, Inclined surface 213, Connecting outer ring 22, Third sealing ring 221, Through hole 23, Countersunk hole 24, Outer shell 3, Reinforcing ring 31, Seventh sealing ring 311, Tail cover plate 4, Tail connecting ring 41, Sixth sealing ring 411. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] 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.

[0025] 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 is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-4As shown, in one embodiment of this utility model, a motor end cover sealing mechanism is provided, including a base 1, an end cover 2, and a housing 3. The base 1 is provided with a connecting step 11, and a first rotating connecting element 12 is provided on the connecting step 11. The end cover 2 is provided with a connecting inner ring 21 and a connecting outer ring 22. The connecting inner ring 21 is connected to the first rotating connecting element 12, and the connecting outer ring 22 is connected to the housing 3. The connecting step 11 is provided with a first sealing ring 111, which seals against the inner diameter of the first rotating connecting element 12. The connecting inner ring 21 is provided with a second sealing ring 211, which seals against the outer diameter of the connecting element. The connecting outer ring 22 is provided with a third sealing ring 221, which seals against the inner diameter of the housing 3. This embodiment ensures a stable and flexible rotary connection between the end cover 2 and the base 1 by setting a connecting step 11 on the base 1 and equipping the connecting step 11 with a first rotary connecting element 12. Simultaneously, the connecting inner ring 21 of the end cover 2 is connected to the first rotary connecting element 12. This provides a fundamental guarantee for the rational layout and operation of the motor's internal components, and helps optimize the compactness and stability of the overall motor structure. A first sealing ring 111 is provided at the connecting step 11 and seals against the inner diameter of the first rotary connecting element 12, effectively preventing external dust, moisture, and other impurities from entering the motor through the connection gap between the base 1 and the first rotary connecting element 12. This provides excellent protection for the precision components inside the motor, greatly improves the cleanliness of the motor's operating environment, reduces the failure rate caused by impurities, and extends the motor's service life. The inner ring 21 is equipped with a second sealing ring 211, which seals against the outer diameter of the connecting element, further enhancing the sealing between the end cover 2 and the connecting structure. This prevents internal gas leakage and the infiltration of foreign matter during motor operation, ensuring stable internal air pressure and reducing the adverse effects of air pressure changes on motor performance, thus improving the stability and reliability of motor operation. The outer ring 22 is equipped with a third sealing ring 221, which seals against the inner diameter of the outer casing 3, perfecting the entire sealing system. This creates a reliable sealing barrier between the motor end cover 2 and the outer casing 3, comprehensively protecting the internal structure of the motor from external interference. This ensures the motor can operate normally and efficiently in various complex environments, improving its adaptability to different working environments. This embodiment improves the motor's sealing performance, stability, and durability.

[0026] One end of the base 1 is provided with a connecting part 13, and the end cover 2 is provided with a through hole 23. The connecting part 13 passes through and extends to the outside of the through hole 23. In this embodiment, the connecting part 13 passing through and extending to the outside of the through hole 23 firstly achieves a stable connection between the base 1 and the end cover 2, ensuring the stability of the overall motor structure. It can effectively withstand the vibration and torque generated during motor operation, prevent the end cover 2 from loosening, ensure the relative positional accuracy of the motor components, and avoid affecting motor performance due to component displacement. The connecting part 13 extending to the outside of the through hole 23 can be used to connect mounting components.

[0027] The connecting step 11 is located on the lower side of the connecting part 13. The connecting inner ring 21 and the connecting step 11 are oppositely provided with a mating step 212. The mating step 212 and the connecting step 11 respectively fix the inner and outer diameters of the first rotating connecting element 12. In this embodiment, the precise fixing of the inner and outer diameters of the first rotating connecting element 12 greatly improves the stability of the connection between the motor end cover 2 and related components. This ensures that there will be no loosening or displacement between the end cover 2 and the rotating component during high-speed motor operation, thereby effectively reducing vibration and noise caused by unstable connection and improving the smoothness of motor operation. It also helps improve sealing performance. The tightly fitted connecting step 11 and mating step 212 prevent the intrusion of external dust, moisture, and other impurities, protecting the internal components of the motor from corrosion and extending the service life of the motor.

[0028] The outer diameter of the connecting inner ring 21 is provided with an inclined surface 213, and the base 1 is provided with a recess 14 on the lower side of the connecting step 11, with one end of the connecting inner ring 21 extending toward the recess 14. In this embodiment, the inclined surface 213 helps to guide the assembly process, allowing the connecting inner ring 21 to dock more smoothly with related components, reducing assembly difficulty and errors, and improving assembly efficiency and accuracy. The recess 14 on the lower side of the base 1 of the connecting step 11, combined with the design of one end of the connecting inner ring 21 extending toward the recess 14, forms a specific spatial structure. On the one hand, the recess 14 can accommodate the extended part of the connecting inner ring 21, playing a role in positioning and stabilizing the connection, enhancing the relative stability between the connecting inner ring 21 and the base 1, preventing displacement or loosening of the two during motor operation, and ensuring the reliability of the sealing structure. On the other hand, this structure provides reasonable space for the arrangement of sealing materials, effectively blocking external dust, moisture and other impurities from entering the motor, improving the motor's protection level.

[0029] A first sealing groove is provided on the wall surface of the connecting step 11, and a first sealing ring 111 is disposed within the first sealing groove. A second sealing groove is provided on the inner connecting ring 21, and a second sealing ring 211 is disposed within the second sealing groove. A third sealing groove is provided on the outer connecting ring 22, and a third sealing ring 221 is disposed within the third sealing groove. In this embodiment, the first sealing groove and the first sealing ring 111 therein seal the wall surface of the connecting step 11, effectively preventing external dust, moisture, and other impurities from entering the motor through the gaps in the connecting step 11, reducing the risk of motor failure due to impurities. The combination of the second sealing groove and the second sealing ring 211 further enhances the sealing performance at the inner connecting ring 21. This enhances the sealing of the internal medium of the motor, preventing leakage, and also resists the influence of external environmental factors on the core components of the motor, ensuring the stability of the internal electrical performance of the motor. The placement of the third sealing groove and the third sealing ring 221 on the outer connecting ring 22 further improves the overall sealing system. Together with the previous two elements, a multi-layered, all-around sealing structure is formed, which greatly improves the reliability and durability of the sealing mechanism of the motor end cover 2.

[0030] The end face of the outer casing 3 is provided with a connecting hole, and the end cover 2 is provided with a countersunk hole 24. A screw is installed in the countersunk hole 24 and connected to the connecting hole. In this embodiment, the screw and the connecting hole are tightly fitted, which can effectively withstand the vibration and torque generated during motor operation, ensure the relative position stability between the end cover 2 and the outer casing 3, prevent damage to the sealing structure due to loosening, and ensure the normal operation of the motor. The design of the countersunk hole 24 is conducive to achieving good sealing performance. The screw is recessed into the countersunk hole 24, avoiding interference from the protruding part to the sealing structure of the outer casing 3, allowing the seal to better fit the mating surface of the outer casing 3 and the end cover 2, reducing gaps, thereby effectively preventing dust, moisture and other impurities from entering the motor, protecting the motor windings and other key components from the influence of the external environment, extending the service life of the motor, and improving its operational stability and reliability.

[0031] The system also includes a tail cover plate 4. The base 1 is provided with a tail connecting seat 15, the tail connecting seat 15 is provided with a second rotary connecting element 151, and the tail cover plate 4 is provided with a tail connecting ring 41. The second rotary connecting element 151 is used to connect the tail connecting seat 15 and the tail connecting ring 41. The outer shell 3 is provided with a reinforcing ring 31, which is used to connect the tail cover plate 4. Specifically, the tail connecting seat 15 is provided with a fourth sealing ring 152 and a fifth sealing ring 153. The fourth sealing ring 152 is used to abut against the inner diameter of the second rotary connecting element 151, and the fifth sealing ring 153 is used to seal the end of the second rotary connecting element 151. In this embodiment, the tail cover plate 4 is connected to the tail connecting seat 15 through the second rotary connecting element 151, which ensures the stability of the structure, provides a certain degree of flexibility, and facilitates operation during assembly and maintenance. The reinforcing ring 31 connects to the tail cover plate 4, further enhancing the overall structural strength and stability, effectively resisting vibrations and impacts generated during motor operation, and preventing the sealing performance from being affected by loosening of the sealing structure due to vibration. The fourth sealing ring 152 abuts against the inner diameter of the second rotary connecting element 151, and the fifth sealing ring 153 seals the end of the second rotary connecting element 151. The two work together to construct a reliable sealing defense. The fourth sealing ring 152 prevents dust, moisture, and other impurities from entering the motor from the inner diameter of the rotary connecting element, while the fifth sealing ring 153 prevents contaminants that may enter from the end of the rotary connecting element, greatly improving the protection level of the sealing mechanism of the motor end cover 2.

[0032] The tail connecting ring 41 is provided with a sixth sealing ring 411, which is used to seal against the outer diameter of the second rotary connecting element 151. Specifically, the bottom surface of the reinforcing ring 31 is provided with a seventh sealing ring 311, which seals against the tail cover plate 4. In this embodiment, the design of the sixth sealing ring 411 sealing against the outer diameter of the second rotary connecting element 151 effectively prevents the leakage of lubricating oil inside the motor, and at the same time prevents the intrusion of external dust, moisture and other impurities, greatly improving the stability of the internal environment of the motor. It not only ensures that the various components of the motor operate normally under good lubrication conditions, reduces wear and extends service life, but also avoids electrical faults that may be caused by the entry of impurities, and protects the electrical performance of the motor. The seventh sealing ring 311 on the bottom surface of the reinforcing ring 31 seals against the tail cover plate 4, further enhancing the reliability of the entire sealing mechanism. It provides additional sealing protection for the motor end cover 2, reducing the risk of seal failure caused by factors such as vibration and temperature changes. Through this multi-seal design, the sealing mechanism of the motor end cover 2 can better adapt to complex working environments and improve the overall protection level of the motor.

[0033] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A motor end cover sealing mechanism, characterized in that: The device includes a base, an end cap, and a housing. The base has a connecting step, on which a first rotary connecting element is mounted. The end cap has an inner connecting ring and an outer connecting ring. The inner connecting ring is connected to the first rotary connecting element, and the outer connecting ring is connected to the housing. The connecting step has a first sealing ring, which seals against the inner diameter of the first rotary connecting element. The inner connecting ring has a second sealing ring, which seals against the outer diameter of the connecting element. The outer connecting ring has a third sealing ring, which seals against the inner diameter of the housing.

2. The motor end cover sealing mechanism according to claim 1, characterized in that: One end of the base is provided with a connecting part, and the end cap is provided with a through hole, through which the connecting part passes and extends to the outside of the through hole.

3. The motor end cover sealing mechanism according to claim 1, characterized in that: The connecting step is located on the lower side of the connecting part, and the connecting inner ring is provided with a mating step opposite to the connecting step. The mating step and the connecting step fix the inner diameter and outer diameter of the first rotating connecting element, respectively.

4. The motor end cover sealing mechanism according to claim 1, characterized in that: The outer diameter of the connecting inner ring is provided with an inclined surface, and the base is provided with a sink groove on the lower side of the connecting step, with one end of the connecting inner ring extending toward the sink groove.

5. The motor end cover sealing mechanism according to claim 1, characterized in that: The wall surface of the connecting step is provided with a first sealing groove, and the first sealing ring is disposed in the first sealing groove. The inner connecting ring is provided with a second sealing groove, and the second sealing ring is disposed in the second sealing groove. The outer connecting ring is provided with a third sealing groove, and the third sealing ring is disposed in the third sealing groove.

6. The motor end cover sealing mechanism according to claim 1, characterized in that: The end face of the outer shell is provided with a connection hole, and the end cap is provided with a countersunk hole, in which a screw is provided to connect with the connection hole.

7. The motor end cover sealing mechanism according to claim 1, characterized in that: It also includes a tail cover plate, the base is provided with a tail connecting seat, the tail connecting seat is provided with a second rotary connecting element, the tail cover plate is provided with a tail connecting ring, the second rotary connecting element is used to connect the tail connecting seat and the tail connecting ring; the outer shell is provided with a reinforcing ring, the reinforcing ring is used to connect the tail cover plate.

8. The motor end cover sealing mechanism according to claim 7, characterized in that: The tail connector is provided with a fourth sealing ring and a fifth sealing ring. The fourth sealing ring is used to abut against the inner diameter of the second rotary connecting element, and the fifth sealing ring is used to seal the end of the second rotary connecting element.

9. The motor end cover sealing mechanism according to claim 7, characterized in that: The tail connecting ring is provided with a sixth sealing ring, which is used to seal against the outer diameter of the second rotating connecting element.

10. The motor end cover sealing mechanism according to claim 7, characterized in that: The bottom surface of the reinforcing ring is provided with a seventh sealing ring, which seals against the tail cover plate.

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