Motor end seal structure

Abstract

This utility model relates to the field of motor technology, specifically a motor end sealing structure, including a base, a first end cover, a first rotary connecting element, and a first sealing element. The base is provided with a first internal connecting step, and the first end cover is provided with a first external connecting step and a first end sealing step. The first end sealing step is located on one side of the first rotary connecting part. A first sealing abutment surface is provided on the side of the base opposite to the first end sealing step. The first sealing element is disposed on the first end sealing step, with its outer diameter sealingly abutting against the first end sealing step and its inner diameter abutting against the first sealing abutment surface. This utility model can effectively prevent external dust, moisture, and other impurities from entering the motor, avoiding the corrosion of internal motor components by impurities, reducing the probability of malfunctions caused by impurity accumulation, and extending the service life of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor end sealing structure. 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] The poor sealing of the end caps in existing external rotor motors presents a significant problem. This inadequate sealing allows dust, moisture, and other impurities to easily penetrate the motor's interior. This not only accelerates the wear of internal components but can also lead to electrical faults, severely impacting the motor's lifespan and stability. The problems caused by insufficient sealing are particularly pronounced in demanding environmental applications, such as outdoor robotics. Therefore, a new design for the existing motor sealing structure is necessary. Utility Model Content

[0004] To solve the above problems, this utility model provides a motor end sealing structure that can effectively prevent external dust, moisture and other impurities from entering the motor, avoid the corrosion of internal motor components by impurities, reduce the probability of failure caused by impurity accumulation, and extend the service life of the motor.

[0005] The technical solution adopted by this utility model is: a motor end sealing structure, including a base, a first end cover, a first rotary connecting element, and a first sealing element. The base is provided with a first internal connecting step, the first end cover is provided with a first external connecting step and a first end sealing step, the first internal connecting step and the first external connecting step are opposite to each other and form a first rotary connecting part, the first rotary connecting element is provided in the first rotary connecting part for connecting the base and the first end cover, the first end sealing step is located on one side of the first rotary connecting part, the side of the base opposite to the first end sealing step is provided with a first sealing abutment surface, the first sealing element is provided on the first end sealing step, the outer diameter of the first sealing element abuts against the first end sealing step, and the inner diameter abuts against the first sealing abutment surface.

[0006] A further improvement to the above scheme is that the base is provided with a sink groove on the lower side of the first internal connecting step, and the first end cover is provided with a first sealing inner ring and a first sealing outer ring, with one end of the first sealing inner ring extending toward the sink groove.

[0007] A further improvement to the above scheme is that the first external connecting step is disposed within the inner diameter of the first sealing inner ring, and a spacer ring is provided between the first external connecting step and the first end sealing step for separation.

[0008] A further improvement to the above solution is that it also includes a housing, an assembly slot is provided on the outer side of the first sealing outer ring, one end of the housing is inserted into the assembly slot, a first sealing groove is provided on the wall surface of the first sealing outer ring facing the housing, and a first sealing ring is provided in the first sealing groove.

[0009] A further improvement to the above solution is that it also includes a second end cap, wherein the base is provided with a second internal connecting step, the second end cap is provided with a second external connecting step and a second end sealing step, the second internal connecting step and the second external connecting step are opposite to each other and form a second rotating connecting part, and the second rotating connecting part is provided with a second rotating connecting element for connecting the base and the second end cap.

[0010] A further improvement to the above scheme is that the second end sealing step is provided with a second sealing element, and the base is provided with a second sealing abutment surface on the side opposite to the second end sealing step. The outer diameter of the second sealing element abuts against the second end sealing step, and the inner diameter abuts against the second sealing abutment surface.

[0011] A further improvement to the above solution is that the first sealing element includes a first outer sealing ring and a first inner contact ring, the first outer sealing ring and the first inner contact ring are integrally formed, the first outer sealing ring is provided with a first sealing lip, and the first sealing lip is used to abut against the first end sealing step.

[0012] A further improvement to the above solution is that the first outer sealing ring is L-shaped and forms a first annular buffer groove with the first inner contact ring; the cross-sectional shape of the first inner contact ring is S-shaped, and a first shape fixing ring is provided on the side of the first inner contact ring facing the first outer sealing ring, the first shape fixing ring being used to keep the first inner contact ring in contact with the first sealing contact surface.

[0013] A further improvement to the above solution is that the second sealing element includes a second outer sealing ring and a second inner contact ring, the second outer sealing ring and the second inner contact ring are integrally formed, the second outer sealing ring is provided with a second sealing lip, the second sealing lip is used to abut against the second end sealing step.

[0014] A further improvement to the above scheme is that the second outer ring sealing ring is L-shaped and forms a second annular buffer groove with the second inner ring contact ring; the cross-sectional shape of the second inner ring contact ring is S-shaped, and a second shape fixing ring is provided on the side of the second inner ring contact ring facing the second outer ring sealing ring. The second shape fixing ring is used to keep the second inner ring contact ring in contact with the second sealing contact surface.

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

[0016] Compared to existing motor sealing structures, this invention achieves a stable connection between the base and the first end cover by forming a first rotating connection part through the first internal connecting step of the base and the first external connecting step of the first end cover, and by setting a first rotating connecting element. This ensures the integrity and stability of the structure, effectively withstands various stresses during motor operation, and guarantees the overall reliable operation of the motor. The setting and cooperation of the first end sealing step and the first sealing contact surface, as well as the design of the outer diameter of the first sealing element sealingly contacting the first end sealing step and the inner diameter contacting the first sealing contact surface, construct a highly efficient sealing mechanism. This effectively prevents external dust, moisture, and other impurities from entering the motor, avoiding the corrosion of internal components by impurities, reducing the probability of failures caused by impurity accumulation, and extending the motor's service life. Simultaneously, it prevents leakage of lubricants and other internal components, maintaining a good working environment inside the motor. This invention achieves a sealing function without adding excessive complexity, which helps reduce production costs, improve production efficiency, and enhance the product's competitiveness in the market. Attached Figure Description

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

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

[0019] Figure 3 for Figure 1 Front view schematic diagram of the end sealing structure of the motor;

[0020] Figure 4 for Figure 3 Sectional view of AA;

[0021] Figure 5 for Figure 4 Enlarged diagram of point A in the diagram;

[0022] Figure 6 for Figure 4 Enlarged diagram of point B in the image.

[0023] Explanation of reference numerals in the attached drawings: Base 1, First internal connecting step 11, First sealing contact surface 12, Slot 13, Second internal connecting step 14, Second sealing contact surface 15, First end cap 2, First external connecting step 21, First end sealing step 22, First sealing inner ring 23, First sealing outer ring 24, Assembly slot 241, First sealing ring 242, First rotary connecting element 3, First sealing element 4, First outer ring sealing ring 41, First sealing outer lip 411, First inner ring contact ring 42, First annular buffer groove 421, First shape fixing ring 422, Outer shell 5, Second end cap 6, Second external connecting step 61, Second end sealing step 62, Second rotary connecting element 7, Second sealing element 8, Second outer ring sealing ring 81, Second sealing outer lip 811, Second inner ring contact ring 82, Second annular buffer groove 821, Second shape fixing ring 822. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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 1-6As shown, in one embodiment of this utility model, a motor end sealing structure is provided, including a base 1, a first end cover 2, a first rotary connecting element 3, and a first sealing element 4. The base 1 is provided with a first internal connecting step 11, the first end cover 2 is provided with a first external connecting step 21 and a first end sealing step 22, the first internal connecting step 11 and the first external connecting step 21 are opposite to each other and form a first rotary connecting part, the first rotary connecting element 3 is provided in the first rotary connecting part for connecting the base 1 and the first end cover 2, the first end sealing step 22 is located on one side of the first rotary connecting part, the side of the base 1 opposite to the first end sealing step 22 is provided with a first sealing abutment surface 12, the first sealing element 4 is provided on the first end sealing step 22, the outer diameter of the first sealing element 4 is in sealing contact with the first end sealing step 22, and the inner diameter is in contact with the first sealing abutment surface 12. In this embodiment, a first rotating connection portion is formed by the first internal connecting step 11 of the base 1 and the first external connecting step 21 of the first end cover 2, and a first rotating connecting element 3 is provided. This achieves a stable connection between the base 1 and the first end cover 2, ensuring the integrity and stability of the structure. It can effectively withstand various stresses during motor operation and ensure the reliable operation of the motor as a whole. The setting and cooperation of the first end sealing step 22 and the first sealing contact surface 12, as well as the design of the outer diameter of the first sealing element 4 sealingly contacting the first end sealing step 22 and the inner diameter contacting the first sealing contact surface 12, construct an efficient sealing mechanism. This sealing method can effectively prevent external dust, moisture and other impurities from entering the motor, avoiding the corrosion of internal motor components by impurities, reducing the probability of failure caused by impurity accumulation, and extending the service life of the motor. At the same time, it also prevents the leakage of lubricants and other substances inside the motor, maintaining a good working environment inside the motor. This embodiment achieves the sealing function without adding too many complex structures, which helps to reduce production costs, improve production efficiency, and enhance the product's competitiveness in the market.

[0027] A recessed groove 13 is provided on the lower side of the base 1 at the first internal connecting step 11. The first end cap 2 is provided with a first inner sealing ring 23 and a first outer sealing ring 24, with one end of the first inner sealing ring 23 extending toward the recessed groove 13. Specifically, the first outer connecting step 21 is located within the inner diameter of the first inner sealing ring 23, and a spacer ring is provided between the first outer connecting step 21 and the first end sealing step 22 for separation. In this embodiment, the recessed groove 13 on the lower side of the base 1 cooperates with the first inner sealing ring 23, and the recessed groove 13 provides space for the extension of the first inner sealing ring 23. The two work together to effectively prevent external dust, impurities, and other foreign objects from entering the equipment, enhancing the sealing and protective performance of the equipment and extending the service life of the internal components. The design of the first inner sealing ring 23 and the first outer sealing ring 24 forms a double sealing structure, further improving the sealing effect, reducing the risk of leakage of the internal medium of the equipment, and ensuring the stability and reliability of the equipment operation. The first external connecting step 21 is set in the inner diameter of the first sealing inner ring 23 and is separated from the first end sealing step 22 by a spacer ring, which optimizes the structural space and makes the connection of each component more compact and reasonable. At the same time, the presence of the spacer ring can not only prevent direct friction and wear between different components, but also play a certain role in buffering and positioning, ensuring the stability of the overall structure of the equipment and the assembly accuracy.

[0028] The system also includes a housing 5. An assembly slot 241 is provided on the outer side of the first sealing outer ring 24. One end of the housing 5 is inserted into the assembly slot 241. A first sealing groove is provided on the wall surface of the first sealing outer ring 24 facing the housing 5, and a first sealing ring 242 is disposed within the first sealing groove. In this embodiment, one end of the housing 5 is inserted into the assembly slot 241 of the first sealing outer ring 24, achieving precise positioning and stable assembly. This ensures a tight connection and accurate positioning between the housing 5 and the first sealing outer ring 24, reducing the risk of seal failure due to loosening. The first sealing groove on the wall surface of the first sealing outer ring 24 facing the housing 5, with the first sealing ring 242 inside, effectively prevents external moisture, dust, and other impurities from entering the motor. The first sealing ring 242 possesses good elasticity and sealing performance, forming a reliable sealing barrier between the housing 5 and the first sealing outer ring 24. Even when the motor operates under complex working conditions, it can protect the internal electrical components from adverse external factors, thereby extending the motor's service life and improving the stability and reliability of motor operation.

[0029] The system also includes a second end cap 6. The base 1 is provided with a second internal connecting step 14, and the second end cap 6 is provided with a second external connecting step 61 and a second end sealing step 62. The second internal connecting step 14 and the second external connecting step 61 are opposite to each other and form a second rotary connecting part. The second rotary connecting part is provided with a second rotary connecting element 7 for connecting the base 1 and the second end cap 6. In this embodiment, the second internal connecting step 14 and the second external connecting step 61 are opposite to each other and form a second rotary connecting part, and the second rotary connecting element 7 is provided, so that a precise and stable connection is achieved between the base 1 and the second end cap 6. On the one hand, the precise connection helps to ensure the stability of the overall structure of the motor. During the operation of the motor, it can effectively reduce the vibration and noise caused by loose parts and improve the smoothness of motor operation. On the other hand, the stable connection provides a good foundation for end sealing. The second end sealing step 62, together with the overall connection structure, can better prevent external dust, moisture and other impurities from entering the motor, improve the protection level of the motor and extend the service life of the motor.

[0030] The second end sealing step 62 is provided with a second sealing element 8. A second sealing contact surface 15 is provided on the side of the base 1 opposite to the second end sealing step 62. The outer diameter of the second sealing element 8 seals against the second end sealing step 62, and its inner diameter abuts against the second sealing contact surface 15. In this embodiment, the outer diameter of the second sealing element 8 seals against the second end sealing step 62, effectively preventing external dust, moisture, and other impurities from intruding from the side of the motor end, preventing them from entering the motor interior and corroding key components such as windings and cores, greatly improving the motor's protection level and extending its service life. Its inner diameter abuts against the second sealing contact surface 15, further enhancing the integrity of the seal, avoiding possible leakage paths in the axial direction, and creating a relatively stable and clean operating environment inside the motor. This sealing structure design optimizes the sealing performance of the motor end, reduces the failure rate caused by poor sealing, improves the reliability and stability of motor operation, and ensures efficient and continuous operation of the motor under various complex working conditions.

[0031] The first sealing element 4 includes a first outer sealing ring 41 and a first inner contact ring 42. The first outer sealing ring 41 and the first inner contact ring 42 are integrally formed. The first outer sealing ring 41 is provided with a first sealing lip 411, which abuts against the first end sealing step 22. Specifically, the first outer sealing ring 41 is L-shaped and forms a first annular buffer groove 421 with the first inner contact ring 42. The cross-sectional shape of the first inner contact ring 42 is S-shaped, and a first shape fixing ring 422 is provided on the side of the first inner contact ring 42 facing the first outer sealing ring 41. The first shape fixing ring 422 is used to keep the first inner contact ring 42 in contact with the first sealing abutment surface 12. In this embodiment, the first outer sealing ring 41 and the first inner contact ring 42 are integrally formed, which has a stable structure and strong integrity, reducing the risk of sealing failure due to component separation. The L-shaped first outer sealing ring 41, in conjunction with the first sealing lip 411, can tightly fit the first end sealing step 22, forming a highly efficient external sealing barrier. This effectively prevents dust, moisture, and other impurities from entering the motor, protecting the core components. The first annular buffer groove 421 can buffer the vibration and impact generated during motor operation, reducing damage to the sealing structure and extending the service life of the sealing elements. The S-shaped first inner contact ring 42 can better adapt to the complex structural changes inside the motor, ensuring a tight contact with the first sealing contact surface 12. The first shaped fixing ring 422 further enhances this contact effect, ensuring that the first inner contact ring 42 maintains reliable sealing contact under long-term operation and vibration conditions, comprehensively improving the sealing performance of the motor end.

[0032] The second sealing element 8 includes a second outer sealing ring 81 and a second inner contact ring 82. The second outer sealing ring 81 and the second inner contact ring 82 are integrally formed. The second outer sealing ring 81 is provided with a second sealing lip 811, which serves as a second end sealing step 62. Specifically, the second outer sealing ring 81 is L-shaped and forms a second annular buffer groove 821 with the second inner contact ring 82. The cross-sectional shape of the second inner contact ring 82 is S-shaped, and a second shape fixing ring 822 is provided on the side of the second inner contact ring 82 facing the second outer sealing ring 81. The second shape fixing ring 822 is used to keep the second inner contact ring 82 in contact with the second sealing abutment surface 15. In this embodiment, the second outer sealing ring 81 and the second inner contact ring 82 are integrally formed, resulting in a compact and stable structure, reducing the assembly gap of components, and effectively improving the overall sealing performance. The L-shaped second outer sealing ring 81, paired with the S-shaped second inner contact ring 82, optimizes the sealing space layout. Furthermore, the second annular buffer groove 821 can accommodate any impurities and liquids that may intrude, preventing them from directly impacting critical sealing components and extending the service life of the sealing element. The second sealing lip 811 serves as the second end sealing step 62, achieving a reliable end seal and effectively preventing external moisture, dust, and other contaminants from entering the motor, ensuring a safe operating environment. The second-shaped fixing ring 822 ensures that the second inner contact ring 82 always maintains tight contact with the second sealing contact surface 15, maintaining stable sealing performance, reducing the risk of leakage due to poor contact, and comprehensively improving the reliability and stability of the motor end sealing structure.

[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 sealing structure for the end of an electric motor, characterized in that: The device includes a base, a first end cap, a first rotary connecting element, and a first sealing element. The base has a first internal connecting step, the first end cap has a first external connecting step and a first end sealing step, the first internal connecting step and the first external connecting step are opposite to each other and form a first rotary connecting portion, the first rotary connecting element is disposed in the first rotary connecting portion for connecting the base and the first end cap, the first end sealing step is located on one side of the first rotary connecting portion, the side of the base opposite to the first end sealing step is provided with a first sealing abutment surface, the first sealing element is disposed on the first end sealing step, the outer diameter of the first sealing element abuts against the first end sealing step, and the inner diameter abuts against the first sealing abutment surface.

2. The motor end sealing structure according to claim 1, characterized in that: The base is provided with a sink groove on the lower side of the first internal connecting step, and the first end cap is provided with a first sealing inner ring and a first sealing outer ring, with one end of the first sealing inner ring extending toward the sink groove.

3. The motor end sealing structure according to claim 2, characterized in that: The first external connecting step is disposed within the inner diameter of the first sealing inner ring, and a spacer ring is provided between the first external connecting step and the first end sealing step for separation.

4. The motor end sealing structure according to claim 3, characterized in that: It also includes a housing, an assembly slot is provided on the outer side of the first sealing outer ring, one end of the housing is inserted into the assembly slot, a first sealing groove is provided on the wall surface of the first sealing outer ring facing the housing, and a first sealing ring is provided in the first sealing groove.

5. The motor end sealing structure according to claim 4, characterized in that: It also includes a second end cap. The base is provided with a second internal connecting step, the second end cap is provided with a second external connecting step and a second end sealing step, the second internal connecting step and the second external connecting step are opposite to each other and form a second rotating connecting part, the second rotating connecting part is provided with a second rotating connecting element for connecting the base and the second end cap.

6. The motor end sealing structure according to claim 5, characterized in that: The second end sealing step is provided with a second sealing element, and the base is provided with a second sealing abutment surface on the side opposite to the second end sealing step. The outer diameter of the second sealing element abuts against the second end sealing step, and the inner diameter abuts against the second sealing abutment surface.

7. The motor end sealing structure according to claim 1, characterized in that: The first sealing element includes a first outer sealing ring and a first inner contact ring. The first outer sealing ring and the first inner contact ring are integrally formed. The first outer sealing ring is provided with a first sealing lip, which is used to abut against the first end sealing step.

8. The motor end sealing structure according to claim 7, characterized in that: The first outer sealing ring is L-shaped and forms a first annular buffer groove with the first inner contact ring; the cross-sectional shape of the first inner contact ring is S-shaped, and a first shape fixing ring is provided on the side of the first inner contact ring facing the first outer sealing ring. The first shape fixing ring is used to keep the first inner contact ring in contact with the first sealing contact surface.

9. The motor end sealing structure according to claim 6, characterized in that: The second sealing element includes a second outer sealing ring and a second inner contact ring. The second outer sealing ring and the second inner contact ring are integrally formed. The second outer sealing ring is provided with a second sealing lip, which is used to abut against the second end sealing step.

10. The motor end sealing structure according to claim 9, characterized in that: The second outer sealing ring is L-shaped and forms a second annular buffer groove with the second inner contact ring; the cross-sectional shape of the second inner contact ring is S-shaped, and a second shape fixing ring is provided on the side of the second inner contact ring facing the second outer sealing ring. The second shape fixing ring is used to keep the second inner contact ring in contact with the second sealing contact surface.

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