Motor sealing mechanism and motor

Abstract

This utility model relates to the field of motor technology, specifically a motor sealing mechanism and a motor, including a base, a housing, a rotating connector, and a seal. The base is disposed within the housing and connected by the rotating connector to form an annular groove between the base and the housing. The seal is disposed within the annular groove to seal the groove. The seal includes an outer sealing ring and an inner contact ring, which are integrally formed. The outer diameter of the outer sealing ring seals against the housing, and the inner contact ring has at least two sealing contact portions that seal against the base. This utility model effectively prevents external dust, rainwater, and debris from entering the motor, avoiding the corrosion of internal precision components by contaminants and significantly extending the motor's service life.

Description

Technical Field

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

[0002] In today's garden machinery industry, lawnmowers, as widely used equipment for lawn mowing, rely heavily on stable performance for efficient and high-quality mowing. The motor, as the core power component of the lawnmower, directly affects its overall operational performance.

[0003] However, existing lawnmowers exhibit insufficient stability in their motors during actual use. This issue leads to power fluctuations during operation, affecting mowing efficiency and even causing sudden shutdowns in some cases, severely impacting work progress. Furthermore, insufficient motor stability can cause excessive wear on components, increasing maintenance costs and frequency, and reducing the lawnmower's lifespan. This is primarily due to insufficient sealing in the mower motor, allowing contaminants to enter and shorten its lifespan. Therefore, a redesign of the sealing structure of existing lawnmower motors is necessary. Utility Model Content

[0004] To solve the above problems, this utility model provides a motor sealing mechanism and motor that can effectively prevent external dust, rainwater and debris from entering the motor, avoid pollutants from corroding the precision components inside the motor, and greatly extend the service life of the motor.

[0005] The technical solution adopted by this utility model is: a motor sealing mechanism, including a base, a housing, a rotating connector, and a sealing element. The base is disposed inside the housing and connected by the rotating connector to form an annular groove between the base and the housing. The sealing element is disposed inside the annular groove to seal the annular groove. The sealing element includes an outer sealing ring and an inner contact ring. The outer sealing ring and the inner contact ring are integrally formed. The outer diameter of the outer sealing ring seals against the housing. The inner contact ring has at least two sealing contact portions that seal against the base.

[0006] A further improvement to the above solution is that a cavity is provided inside the outer shell, a power module is provided inside the cavity, the fixed end of the power module is provided on the base, and the output end of the power module is connected to the outer shell; the rotating connector is provided at one end of the cavity and is used to connect the base and the outer shell to close one end of the cavity.

[0007] A further improvement to the above scheme is that the outer diameter of the base is provided with an outer diameter mounting step, the outer shell is provided with an inner diameter mounting step, the inner diameter mounting step and the outer diameter mounting step are relatively flush to form a rotating mounting position, and the rotating connector is provided on the rotating mounting position.

[0008] A further improvement to the above solution is that the rotating connecting component is a bearing, wherein the inner diameter of the bearing is connected to the base and the outer diameter is connected to the outer shell.

[0009] A further improvement to the above solution is that the outer shell is provided with a sealing and fixing ring, one end of which extends into the annular groove, and one side of the outer sealing ring is in sealing contact with the sealing and fixing ring.

[0010] A further improvement to the above scheme is that the outer sealing ring is provided with a sealing lip, the sealing lip is used to abut against the inner diameter of the outer shell, and the two sides of the sealing lip are provided with chamfers.

[0011] A further improvement to the above solution is that a shape-fixing component is provided inside the outer sealing ring to maintain the shape of the seal.

[0012] A further improvement to the above scheme is that the outer sealing ring is L-shaped and forms an annular buffer groove between it and the inner contact ring, and the annular buffer groove is opposite to the rotating connector.

[0013] A further improvement to the above scheme is that the cross-sectional shape of the inner ring contact ring is S-shaped, and a shape fixing ring is provided on the side of the inner ring contact ring facing the outer ring sealing ring. The shape fixing ring is used to keep the inner ring contact ring in contact with the base.

[0014] An electric motor, including the aforementioned motor sealing mechanism.

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

[0016] Compared to existing lawnmower motors, this invention achieves sealing through a combination of annular groove and sealing elements. The outer sealing ring seals against the outer casing, effectively preventing dust, rainwater, and debris from entering the motor and avoiding corrosion of internal precision components, thus significantly extending the motor's lifespan. Meanwhile, the inner contact ring, with at least two sealing contact points, seals against the base, improving sealing reliability and ensuring that internal lubricating oil and other media do not leak, maintaining a stable operating environment within the motor. The integrated structure of the outer sealing ring and inner contact ring simplifies the sealing process, improves installation efficiency, and reduces sealing gaps that may arise from assembling multiple components, lowering the risk of seal failure.

[0017] When used in lawn mowing motors, where the working environment is relatively harsh, the sealing mechanism can effectively adapt to frequent vibrations and impacts. The rotating connector connects the base and the housing, ensuring the stability of the motor during operation. Combined with the reliable sealing of the seals, this ensures that the lawn mowing motor can work continuously and stably in complex outdoor environments, providing stable power support for lawn mowing operations and improving the overall performance and reliability of the lawn mowing equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the motor sealing mechanism of this utility model;

[0019] Figure 2 for Figure 1 An exploded view of the sealing mechanism of the central motor from another perspective;

[0020] Figure 3 for Figure 1 A front view schematic diagram of the sealing mechanism of the motor.

[0021] Figure 4 for Figure 3 Sectional view of AA;

[0022] Figure 5 for Figure 4 Enlarged diagram of point A in the diagram.

[0023] Explanation of reference numerals in the attached drawings: Base 1, Annular groove 11, Outer diameter mounting step 12, Outer shell 2, Cavity 21, Power module 22, Inner diameter mounting step 23, Sealing and fixing ring 24, Rotating connector 3, Seal 4, Outer ring sealing ring 41, Sealing lip 411, Shape fixing component 412, Annular buffer groove 413, Inner ring contact ring 42, Sealing contact part 421, Shape fixing ring 422. 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 1-5 As shown, in one embodiment of this utility model, a motor sealing mechanism is provided, including a base 1, a housing 2, a rotating connector 3, and a sealing element 4. The base 1 is disposed within the housing 2 and connected by the rotating connector 3 to form an annular groove 11 between the base 1 and the housing 2. The sealing element 4 is disposed within the annular groove 11 to seal the annular groove 11. The sealing element 4 includes an outer sealing ring 41 and an inner contact ring 42, which are integrally formed. The outer diameter of the outer sealing ring 41 seals against the housing 2, and the inner contact ring 42 has at least two sealing contact portions 421 that seal against the base 1. This embodiment achieves sealing through the combination of the annular groove 11 and the sealing element 4. The sealing contact between the outer sealing ring 41 and the housing 2 effectively prevents external dust, rainwater, and debris from entering the motor, avoiding the corrosion of internal precision components by contaminants and greatly extending the service life of the motor. The inner ring contact ring 42 has at least two sealing contact portions 421 that seal against the base 1, improving the reliability of the seal and ensuring that the lubricating oil and other media inside the motor will not leak, maintaining a stable working environment inside the motor. The structure of the outer ring sealing ring 41 and the inner ring contact ring 42 being integrated simplifies the installation process of the seal 4, improves installation efficiency, and reduces the sealing gap that may be caused by the assembly of multiple parts, thus reducing the risk of seal failure.

[0027] A cavity 21 is provided inside the outer casing 2, and a power module 22 is disposed within the cavity 21. The fixed end of the power module 22 is mounted on the base 1, and the output end of the power module 22 is connected to the outer casing 2. A rotating connector 3 is disposed at one end of the cavity 21 and is used to connect the base 1 and the outer casing 2, thereby sealing one end of the cavity 21. In this embodiment, the cavity 21 provided inside the outer casing 2 provides a stable installation space for the power module 22, effectively protecting the power module 22 from external foreign objects and harsh environments, and extending its service life. The fixed end of the power module 22 is mounted on the base 1, and the output end is connected to the outer casing 2. This layout ensures the stability and reliability of power transmission, enabling the mowing motor to continuously and stably output power and ensuring the smooth operation of mowing. The rotating connector 3 connects the base 1 to the outer shell 2 and seals one end of the cavity 21, enabling flexible rotation between the base 1 and the outer shell 2 to adapt to different angle requirements when mowing grass. This enhances the sealing of the cavity 21, preventing dust, rainwater, etc. from entering and avoiding damage to the power module 22.

[0028] The base 1 has an outer diameter mounting step 12, and the outer shell 2 has an inner diameter mounting step 23. The inner diameter mounting step 23 is flush with the outer diameter mounting step 12 to form a rotating mounting position. The rotating connector 3 is mounted on the rotating mounting position. In this embodiment, precise installation and positioning of the various components of the lawnmower motor are ensured. The rotating mounting position provides a stable and precise installation space for the rotating connector 3, allowing the rotating components to rotate around a precise axis during motor operation. This effectively reduces operational instability caused by installation deviations and lowers vibration and noise. The rotating mounting position fits snugly to the rotating connector 3, effectively preventing the intrusion of external impurities such as dust and moisture, avoiding damage to key internal components of the motor, and extending the motor's service life.

[0029] The rotating connector 3 is a bearing, with its inner diameter connected to the base 1 and its outer diameter connected to the outer shell 2. This connection method provides stable and precise support for the motor rotor, ensuring the coaxiality of the motor shaft during high-speed rotation. This effectively reduces vibration and noise caused by shaft misalignment, greatly improving the smoothness of the lawnmower motor's operation. From a sealing perspective, the tight fit between the bearing and the base 1 and outer shell 2 effectively prevents the intrusion of external dust, moisture, and other impurities, preventing them from entering the motor and affecting its electrical performance and lubrication, thus ensuring a good working environment inside the motor.

[0030] The outer casing 2 is provided with a sealing and fixing ring 24, one end of which extends into the annular groove 11. One side of the outer sealing ring 41 is in sealing contact with the sealing and fixing ring 24. In this embodiment, the sealing and fixing ring 24 extending into the annular groove 11 can accurately position and stabilize the sealing structure, preventing displacement of the sealing components during motor operation and ensuring the reliability of the seal. The outer sealing ring 41 is in sealing contact with the sealing and fixing ring 24, and the two fit tightly together, effectively preventing external moisture, dust, and debris from entering the motor. The grass-cutting operation environment is complex, with a lot of dust and mud. The sealing structure can prevent these pollutants from corroding the precision components inside the motor, reducing wear and short-circuit risks caused by impurities, and greatly extending the service life of the motor. A good seal can also prevent the leakage of lubricating oil inside the motor, maintain a stable lubrication environment inside the motor, and ensure the smooth operation of the motor. In this embodiment, the sealing and fixing ring 24 is a retaining ring to fix the bearing.

[0031] The outer sealing ring 41 is provided with a sealing lip 411, which abuts against the inner diameter of the outer casing 2. The sealing lip 411 has chamfered edges on both sides. In this embodiment, the sealing lip 411 abuts against the inner diameter of the outer casing 2, forming an effective physical barrier that greatly prevents external debris, dust, and moisture from entering the motor. The harsh environment of lawn mowing, with its dust and mud, prevents these contaminants from corroding the precision components inside the motor, reducing wear, short circuits, and other malfunctions caused by impurities, and effectively extending the motor's service life. The chamfered edges on both sides of the sealing lip 411 act as a guide during sealing ring installation, allowing the sealing ring to be installed more smoothly into the designated position, reducing installation difficulty, and improving assembly efficiency and accuracy.

[0032] A shape-fixing member 412 is provided inside the outer sealing ring 41 to maintain the shape of the sealing member 4. In this embodiment, due to the harsh working environment of the lawnmower motor, it is often accompanied by vibration, impact, and complex external forces. The shape-fixing member 412 can effectively maintain the shape of the sealing member 4, ensure the stability of the sealing structure, prevent the sealing member 4 from deforming due to vibration and other factors, and thus avoid sealing failure. This greatly improves the motor's sealing performance, effectively resists the intrusion of impurities such as dust and mud, and extends the motor's service life. This allows the motor to maintain good sealing performance during high-load, long-term lawnmower operations, ensuring the normal operation of the internal electrical components of the motor and improving the overall working efficiency and reliability of the motor.

[0033] The outer sealing ring 41 is L-shaped and forms an annular buffer groove 413 between itself and the inner contact ring 42. The annular buffer groove 413 is opposite to the rotating connector. In this embodiment, the annular buffer groove 413 effectively buffers the vibration and impact forces generated by the rotating connector during high-speed operation, reducing its direct impact on the sealing structure, extending the service life of the sealing components, and reducing the risk of seal failure due to vibration. It also reduces wear and improves sealing performance, preventing external water, dust, and debris from entering the motor and avoiding damage to the motor due to impurities.

[0034] The inner contact ring 42 has an S-shaped cross-section. A shape-fixing ring 422 is provided on the side of the inner contact ring 42 facing the outer sealing ring 41. The shape-fixing ring 422 is used to keep the inner contact ring 42 in contact with the base 1. In this embodiment, the S-shaped cross-section can better fit the contour of the internal components of the motor, effectively improving the tightness of the seal, preventing lubricating oil leakage and the intrusion of external dust, moisture and other impurities, thereby extending the service life of the motor and ensuring its stable operation. The shape-fixing ring 422 provided on the side of the inner contact ring 42 facing the outer sealing ring 41 can ensure that the inner contact ring 42 always maintains reliable contact with the base 1. During the operation of the lawnmower motor, vibration and impact forces will be generated. The shape-fixing ring 422 can stabilize the position of the inner contact ring 42, preventing the inner contact ring 42 from shifting due to vibration, thereby damaging the sealing effect. This allows the sealing structure to maintain a good state even in complex working environments, improving the reliability and stability of the lawnmower motor sealing mechanism.

[0035] The motor including the aforementioned motor sealing mechanism is used in lawn mowing motors. Due to the harsh working environment of the equipment, the sealing mechanism can effectively adapt to frequent vibrations and impacts. The rotating connector 3 connects the base 1 and the housing 2, ensuring the stability of the motor during operation. Combined with the reliable sealing of the seal 4, it ensures that the lawn mowing motor can work continuously and stably in complex outdoor environments, providing stable power support for lawn mowing operations and improving the overall performance and reliability of the lawn mowing equipment.

[0036] 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. An electric machine seal mechanism, characterized by: The device includes a base, a housing, a rotating connector, and a seal. The base is disposed within the housing and connected by the rotating connector to form an annular groove between the base and the housing. The seal is disposed within the annular groove to seal the annular groove. The seal includes an outer sealing ring and an inner contact ring, which are integrally formed. The outer diameter of the outer sealing ring seals against the housing, and the inner contact ring has at least two sealing contact portions that seal against the base.

2. The electric machine seal mechanism of claim 1, wherein: The outer shell has a cavity, and a power module is installed inside the cavity. The fixed end of the power module is installed on the base, and the output end of the power module is connected to the outer shell. The rotating connector is located at one end of the cavity and is used to connect the base to the outer shell to close one end of the cavity.

3. The electric machine seal mechanism of claim 1, wherein: The base has an outer diameter mounting step, and the outer shell has an inner diameter mounting step. The inner diameter mounting step and the outer diameter mounting step are flush to form a rotating mounting position, and the rotating connector is disposed on the rotating mounting position.

4. The electric machine seal mechanism of claim 1, wherein: The rotating connector is a bearing, with its inner diameter connected to the base and its outer diameter connected to the outer shell.

5. The electric machine seal mechanism of claim 1, wherein: The outer casing is provided with a sealing ring, one end of which extends into the annular groove, and one side of the outer sealing ring is in sealing contact with the sealing ring.

6. The motor sealing mechanism according to claim 1, characterized in that: The outer sealing ring is provided with a sealing lip, which is used to abut against the inner diameter of the outer shell, and the two sides of the sealing lip are provided with chamfers.

7. The motor sealing mechanism according to claim 1, characterized in that: The outer sealing ring is provided with a shape fixing member to maintain the shape of the seal.

8. The motor sealing mechanism according to claim 1, characterized in that: The outer sealing ring is L-shaped and forms an annular buffer groove with the inner contact ring. The annular buffer groove is opposite to the rotating connector.

9. The motor sealing mechanism according to claim 1, characterized in that: The inner contact ring has an S-shaped cross section. A shape-fixing ring is provided on the side of the inner contact ring facing the outer sealing ring. The shape-fixing ring is used to keep the inner contact ring in contact with the base.

10. An electric motor, characterized in that: Includes the motor sealing mechanism as described in any one of claims 1 to 9.

Images