Roller brush motor sealing connection mechanism

Abstract

This utility model relates to the field of motor power technology, specifically a sealing connection mechanism for a roller brush motor. It includes a fixed shaft, a housing, an end cover, and a sealing element. The end cover is equipped with a rotating connecting element and is connected to the fixed shaft via the rotating connecting element. The housing is located outside the end cover. The sealing element is located on the fixed shaft and close to the rotating connecting element. A sealing inner ring is provided between the sealing element and the rotating connecting element for sealing between the rotating connecting element and the fixed shaft. A sealing abutment portion extends from the sealing element toward the end cover, also for sealing between the end cover and the rotating connecting element. In the working environment of cleaning equipment, dust and liquids are common. The presence of the sealing inner ring prevents these impurities from causing wear, corrosion, or other damage to the rotating components, extending the service life of the rotating connecting element and the fixed shaft, while also ensuring the operating accuracy of the roller brush motor.

Description

Technical Field

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

[0002] In today's cleaning equipment industry, roller brushes are widely used as core cleaning components in various cleaning tools, such as robotic vacuum cleaners, floor scrubbers, and handheld vacuum cleaners. The efficient operation of roller brushes depends on the power provided by the roller brush motor. However, the existing roller brush motor structural design has many problems that urgently need improvement.

[0003] The existing stator and rotor assembly structures of some roller brush motors are not robust enough. The stator assembly is prone to displacement or wobbling during operation, which not only disrupts the internal magnetic field and reduces motor efficiency but also generates additional noise and vibration, affecting the user experience. It also accelerates wear on motor components and shortens the motor's lifespan. Regarding power transmission, the design of the rotating connection section in existing roller brush motors is flawed. The fit between the rotating connection element and the rotating connection shaft is not precise enough, easily leading to power transmission losses. This prevents the motor's output power from being fully converted into the rotational power of the roller brush, resulting in energy waste. In terms of the sealing structure, the insufficient sealing coefficient allows dust, liquids, and other contaminants to easily enter the motor and damage internal components. Therefore, new improvements are needed to the existing roller brush motor structure. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a sealing connection mechanism for a roller brush motor. In the working environment of cleaning equipment, dust and liquids are common. The presence of a sealing inner ring prevents these impurities from causing wear, corrosion, or other damage to rotating components, extending the service life of rotating connecting elements and the fixed shaft. It also ensures the operational accuracy of the roller brush motor.

[0005] The technical solution adopted by this utility model is: a sealing connection mechanism for a roller brush motor, including a fixed shaft, a housing, an end cover, and a sealing element. The end cover is provided with a rotating connecting element, and the end cover is connected to the fixed shaft through the rotating connecting element. The housing is disposed outside the end cover. The sealing element is disposed on the fixed shaft and close to the rotating connecting element. A sealing inner ring is provided between the sealing element and the rotating connecting element, and the sealing inner ring is used for sealing between the rotating connecting element and the fixed shaft. The sealing element extends toward the end cover with a sealing abutment portion, and the sealing abutment portion is used for sealing between the end cover and the rotating connecting element.

[0006] A further improvement to the above solution is that the fixed shaft is provided with a rotating connecting part, the inner diameter of the rotating connecting element is connected to the rotating connecting part, the rotating connecting part is provided with a sealing inner groove, and the sealing inner ring is provided on the rotating connecting part.

[0007] A further improvement to the above solution is that the sealing inner ring is located near the end of the rotary connecting element, and the sealing inner ring is used to seal between the inner diameter of the rotary connecting element and the rotary connecting part.

[0008] A further improvement to the above solution is that the outer diameter of the fixed shaft is provided with a fixed groove, and a fixed retaining ring is provided on the fixed groove. The fixed retaining ring is used to fix the outer end face of the sealing element so that the inner end face of the sealing element abuts against the inner sealing ring.

[0009] A further improvement to the above solution is that the outer shell is provided with a cavity, the end cap is provided with a fixed inner ring and a fixed outer ring, the rotating connecting element is provided on the fixed inner ring, and the fixed outer ring is used to connect one end of the cavity.

[0010] A further improvement to the above scheme is that the fixed inner ring is provided with a fixed step, which is used for the fixed installation of the rotating connecting element; the fixed outer ring is provided with a sealing outer groove, which is provided with a sealing outer ring, and the sealing outer ring is used for sealing between the fixed outer ring and the cavity.

[0011] A further improvement to the above scheme is that multiple sun ribs are provided between the fixed inner ring and the fixed outer ring, and the sun ribs are used to connect the fixed inner ring and the fixed outer ring.

[0012] A further improvement to the above solution is that the sealing element is provided with a sealing inner ring, the inner diameter of which is fitted onto the outer diameter of the fixed shaft, and the sealing abutment portion is inclined toward the end cover from the sealing inner ring, the end of which is used for sealing between the end cover and the rotating connecting element.

[0013] A further improvement to the above solution is that a protective cover is provided on the outside of the sealing element. The protective cover includes a sealing fastening part and a protective outer edge. The sealing fastening part is fastened to the sealing inner ring, and the protective outer edge is provided on the outer edge of the sealing fastening part and extends toward the end cover.

[0014] A further improvement to the above scheme is that the outer edge of the protection is inclined and the end is close to the end cap.

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

[0016] Compared to existing roller brush motors, this invention features a rotary connection where the end cap is connected to the fixed shaft via a rotary connecting element, achieving stable rotation of the end cap relative to the fixed shaft. This ensures coordinated rotation among the components of the roller brush motor during operation, resulting in smoother roller brush rotation and improved cleaning efficiency. The sealing inner ring between the sealing element and the rotary connecting element effectively prevents external dust, liquids, and other impurities from entering the connection between the rotary connecting element and the fixed shaft. In the working environment of cleaning equipment, dust and liquids are common; the sealing inner ring prevents these impurities from causing wear, corrosion, or other damage to the rotating components, extending the service life of the rotary connecting element and the fixed shaft, while also ensuring the operating accuracy of the roller brush motor. The sealing abutment portion extending from the sealing element towards the end cap further strengthens the seal between the end cap and the rotary connecting element. This prevents external substances from entering the motor through the gap between the end cap and the rotary connecting element, effectively protecting other critical components inside the motor, such as circuitry and windings, and preventing malfunctions due to moisture or contamination. The outer casing, located outside the end cap, provides further protection for the end cap and internal components, enhancing the overall protective capability of the sealing connection mechanism. Furthermore, as the power output for the roller brush, the casing enables the roller brush motor to operate stably in harsh cleaning environments, reducing the failure rate caused by poor sealing, lowering maintenance costs, and improving the reliability and efficiency of the cleaning equipment. Attached Figure Description

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

[0018] Figure 2 for Figure 1 Front view schematic diagram of the sealing connection mechanism of the middle roller brush motor;

[0019] Figure 3 for Figure 2 Sectional view of AA;

[0020] Figure 4 for Figure 3 Enlarged diagram of point A in the diagram.

[0021] Figure 5 for Figure 1 A schematic diagram of the internal structure of the sealing connection mechanism of the medium roller brush motor.

[0022] Explanation of reference numerals in the attached drawings: Fixed shaft 1, Rotary connecting part 11, Sealing inner groove 12, Fixed slot 13, Fixed retaining ring 14, Outer shell 2, Cavity 21, End cap 3, Fixed inner ring 31, Fixed step 311, Fixed outer ring 32, Sealing outer groove 321, Sealing outer ring 322, Sun rib 33, Sealing element 4, Sealing inner ring 41, Sealing abutment part 42, Sealing inner ring 43, Protective cover 44, Sealing fastening part 441, Protective outer edge 442, Rotary connecting element 5. 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 1-5As shown, in one embodiment of this utility model, a sealing connection mechanism for a roller brush motor is provided, including a fixed shaft 1, a housing 2, an end cap 3, and a sealing element 4. The end cap 3 is provided with a rotating connecting element 5, and the end cap 3 is connected to the fixed shaft 1 through the rotating connecting element 5. The housing 2 is disposed outside the end cap 3. The sealing element 4 is disposed on the fixed shaft 1 and close to the rotating connecting element 5. A sealing inner ring 41 is provided between the sealing element 4 and the rotating connecting element 5, and the sealing inner ring 41 is used for sealing between the rotating connecting element 5 and the fixed shaft 1. The sealing element 4 extends toward the end cap 3 with a sealing abutment portion 42, and the sealing abutment portion 42 is used for sealing between the end cap 3 and the rotating connecting element 5. In terms of rotational connection, the end cap 3 is connected to the fixed shaft 1 through the rotating connecting element 5, realizing the stable rotation of the end cap 3 relative to the fixed shaft 1. This ensures the coordinated rotation of the various components of the roller brush motor during operation, making the rotation of the roller brush more stable, thereby improving the cleaning effect of the cleaning equipment. The sealing inner ring 41, located between the sealing element 4 and the rotating connecting element 5, effectively prevents external dust, liquids, and other impurities from entering the connection between the rotating connecting element 5 and the fixed shaft 1. In the working environment of cleaning equipment, dust and liquids are common. The presence of the sealing inner ring 41 prevents these impurities from causing wear, corrosion, or other damage to the rotating components, extending the service life of the rotating connecting element 5 and the fixed shaft 1, while also ensuring the operating accuracy of the roller brush motor. The sealing abutment portion 42, extending from the sealing element 4 towards the end cover 3, further strengthens the seal between the end cover 3 and the rotating connecting element 5. This prevents external substances from entering the motor through the gap between the end cover 3 and the rotating connecting element 5, effectively protecting other critical components inside the motor, such as circuits and windings, and preventing malfunctions due to moisture or contamination. The outer shell 2, located outside the end cover 3, provides further protection for the end cover 3 and internal components, enhancing the overall protective capability of the sealing connection mechanism. Furthermore, the outer casing 2 serves as the power output for the roller brush, enabling the roller brush motor to operate stably in harsh cleaning environments. This reduces the failure rate caused by poor sealing, lowers maintenance costs, and improves the reliability and efficiency of the cleaning equipment.

[0026] The fixed shaft 1 is provided with a rotating connecting part 11. The inner diameter of the rotating connecting element 5 is connected to the rotating connecting part 11. The rotating connecting part 11 is provided with a sealing inner groove 12, and a sealing inner ring 41 is provided on the rotating connecting part 11. Specifically, the sealing inner ring 41 is close to the end of the rotating connecting element 5, and the sealing inner ring 41 is used to seal between the inner diameter of the rotating connecting element 5 and the rotating connecting part 11. In this embodiment, the direct connection between the inner diameter of the rotating connecting element 5 and the rotating connecting part 11 provides a reliable structural foundation for the rotation of the roller brush motor. The precise fit ensures the stability of the relative positions of each component during rotation, reduces unnecessary shaking and displacement, and makes the rotation of the roller brush smoother, thereby improving the cleaning efficiency and effect of the cleaning equipment. The sealing inner groove 12 and the sealing inner ring 41 enhance the sealing performance. The sealing inner ring 41 is installed in the sealing inner groove 12 of the rotating connecting part 11 and is close to the end of the rotating connecting element 5, effectively preventing external impurities from entering the gap between the rotating connecting element 5 and the rotating connecting part 11. When cleaning equipment is in operation, it comes into contact with contaminants such as dust and water stains. The sealed inner ring 41 can prevent these substances from entering, avoid wear and corrosion of rotating parts, extend the service life of the parts, and reduce the maintenance cost of the equipment.

[0027] The outer diameter of the fixed shaft 1 is provided with a fixed groove 13, and a fixed retaining ring 14 is provided on the fixed groove 13. The fixed retaining ring 14 is used to fix the outer end face of the sealing element 4 so that the inner end face of the sealing element 4 abuts against the sealing inner ring 41. In this embodiment, the fixed retaining ring 14 can fix the outer end face of the sealing element 4, so that the inner end face of the sealing element 4 abuts tightly against the sealing inner ring 41. When the roller brush motor is running, vibration and shaking are inevitable. If the sealing element 4 is not fixed firmly, its position is prone to displacement, resulting in a decrease in sealing performance. The use of the fixed retaining ring 14 can effectively prevent the sealing element 4 from shifting during operation, ensuring that the sealing inner ring 41 and the sealing element 4 always maintain good contact and maintain a stable sealing state. In the usage scenarios of cleaning equipment, dust, liquid and other impurities can easily invade the inside of the motor. A stable sealing structure can block these impurities, avoid them from damaging key components such as the rotating connecting element 5 and the fixed shaft 1 inside the motor, extend the service life of the motor, reduce the maintenance frequency and cost of the equipment, and ensure that the roller brush motor works continuously and stably in the cleaning equipment.

[0028] The outer casing 2 has a cavity 21, and the end cap 3 has a fixed inner ring 31 and a fixed outer ring 32. The rotary connecting element 5 is disposed on the fixed inner ring 31, and the fixed outer ring 32 is used to connect one end of the cavity 21. Specifically, multiple sun ribs 33 are disposed between the fixed inner ring 31 and the fixed outer ring 32, and the sun ribs 33 are used to connect the fixed inner ring 31 and the fixed outer ring 32. In this embodiment, from the perspective of structural stability, the fixed outer ring 32 of the end cap 3 connects to one end of the cavity 21 of the outer casing 2, providing a stable external support for the entire mechanism. This ensures a tight fit between the outer casing 2 and the end cap 3, keeping the relative positions of each component of the roller brush motor stable during operation, reducing component displacement caused by vibration or external forces, and improving the overall reliability of the motor. The rotary connecting element 5 is disposed on the fixed inner ring 31, and together with the sun ribs 33, connects the fixed inner ring 31 and the fixed outer ring 32, forming a robust support structure. The sun ribs 33 act as reinforcing ribs, enhancing the overall strength of the end cap 3. When the roller brush motor is working, it can withstand greater torque and pressure, prevent the end cap 3 from deforming, ensure the normal rotation of the rotating connecting element 5, and thus ensure the stable operation of the roller brush.

[0029] The inner ring 31 is provided with a fixed step 311, which is used for the fixed installation of the rotary connecting element 5. The outer ring 32 is provided with a sealing groove 321, which is provided with a sealing outer ring 322, which is used for sealing between the outer ring 32 and the cavity 21. In this embodiment, the fixed step 311 of the inner ring 31 provides a precise and stable installation position for the rotary connecting element 5. The rotary connecting element 5 can be tightly installed on the fixed step 311, ensuring its installation accuracy and stability. When the roller brush motor is running, the rotary connecting element 5 can rotate stably around the fixed shaft 1, reducing shaking and offset, making the rotation of the roller brush smoother, which helps to improve the cleaning effect and efficiency of the cleaning equipment. At the same time, the stable installation also reduces the risk of wear caused by loosening of the rotary connecting element 5, extending its service life. The sealing groove 321 and sealing outer ring 322 of the outer ring 32 greatly enhance the sealing performance between the outer ring 32 and the cavity 21. The sealing outer ring 322 is installed inside the sealing outer groove 321, effectively filling the gap between the fixing outer ring 32 and the cavity 21, preventing external dust, moisture, and other impurities from entering the motor. In the operating environment of cleaning equipment, impurities may damage the internal components of the motor. A good seal can prevent such damage, protect the internal circuits, windings, and other critical components of the motor, reduce the probability of failure, improve the reliability and stability of the roller brush motor, and reduce maintenance costs.

[0030] The sealing element 4 is provided with a sealing inner ring 43, the inner diameter of which is fitted onto the outer diameter of the fixed shaft 1. The sealing abutment part 42 is inclined towards the end cover 3 from the sealing inner ring 43, and the end of the sealing abutment part 42 is used for sealing between the end cover 3 and the rotating connecting element 5. In this embodiment, the inner diameter of the sealing inner ring 43 fitted onto the outer diameter of the fixed shaft 1 forms a reliable first line of defense. This effectively prevents external dust, liquids, and other impurities from entering the motor through the fixed shaft 1, avoiding contamination and damage to key components of the motor such as windings and bearings, thereby ensuring the normal operation of the motor and extending its service life. The sealing abutment part 42 is inclined towards the end cover 3 from the sealing inner ring 43, and its end is used for sealing between the end cover 3 and the rotating connecting element 5, enhancing the sealing effect. The inclined sealing abutment part 42 can better adapt to changes in the relative position between the end cover 3 and the rotating connecting element 5, maintaining a good sealing state throughout the motor's rotation. It prevents external contaminants from entering through the gap between the end cover 3 and the rotating connecting element 5, and also prevents the lubricating oil and other media inside the motor from leaking to the outside, maintaining the lubrication environment inside the motor, reducing friction and wear between components, and improving the operating efficiency and stability of the motor.

[0031] A protective cover 44 is provided on the outside of the sealing element 4. The protective cover 44 includes a sealing fastening part 441 and a protective outer edge 442. The sealing fastening part 441 fastens to the sealing inner ring 43, and the protective outer edge 442 is located on the outer edge of the sealing fastening part 441 and extends toward the end cover 3. Specifically, the protective outer edge 442 is inclined and its end is close to the end cover 3. In this embodiment, the sealing reliability is enhanced by the sealing fastening part 441 of the protective cover 44 fastening to the sealing inner ring 43. This prevents the sealing element 4 from shifting or deforming due to external factors, ensuring that the sealing element 4 is always in close contact with the relevant components and maintaining a good sealing state. It also prevents hair and other substances from getting entangled during the cleaning process. The inclined arrangement of the protective outer edge 442 and its end being close to the end cover 3 forms a barrier. When the roller brush motor is working, external debris, liquids, etc., will slide down the inclined outer edge when they come into contact with the protective outer edge 442, without directly impacting the sealing element 4. This reduces external erosion of the sealing element 4 and lowers the risk of seal failure. At the same time, the protective outer edge 442 extends toward the end cap 3, which can also block liquids and debris splashed from the end cap 3 to a certain extent.

[0032] 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 connection mechanism for a roller brush motor, characterized in that: The device includes a fixed shaft, a housing, an end cap, and a sealing element. The end cap is provided with a rotating connecting element and is connected to the fixed shaft via the rotating connecting element. The housing is disposed outside the end cap. The sealing element is disposed on the fixed shaft and close to the rotating connecting element. A sealing inner ring is provided between the sealing element and the rotating connecting element for sealing between the rotating connecting element and the fixed shaft. The sealing element extends toward the end cap with a sealing abutment portion for sealing between the end cap and the rotating connecting element.

2. The sealing connection mechanism for the roller brush motor according to claim 1, characterized in that: The fixed shaft is provided with a rotating connecting part, the inner diameter of the rotating connecting element is connected to the rotating connecting part, the rotating connecting part is provided with a sealing inner groove, and the sealing inner ring is provided on the rotating connecting part.

3. The sealing connection mechanism for the roller brush motor according to claim 2, characterized in that: The sealing inner ring is located near the end of the rotary connecting element, and the sealing inner ring is used to seal between the inner diameter of the rotary connecting element and the rotary connecting part.

4. The sealing connection mechanism for the roller brush motor according to claim 1, characterized in that: The outer diameter of the fixed shaft is provided with a fixed groove, and a fixed retaining ring is provided on the fixed groove. The fixed retaining ring is used to fix the outer end face of the sealing element so that the inner end face of the sealing element abuts against the inner sealing ring.

5. The sealing connection mechanism for the roller brush motor according to claim 1, characterized in that: The outer shell is provided with a cavity, the end cap is provided with a fixed inner ring and a fixed outer ring, the rotating connecting element is provided on the fixed inner ring, and the fixed outer ring is used to connect one end of the cavity.

6. The sealing connection mechanism for the roller brush motor according to claim 5, characterized in that: The inner ring is provided with a fixed step, which is used for the fixed installation of the rotating connecting element; the outer ring is provided with a sealing groove, which is provided with a sealing outer ring, which is used for sealing between the outer ring and the cavity.

7. The sealing connection mechanism for the roller brush motor according to claim 5, characterized in that: Multiple sun ribs are provided between the fixed inner ring and the fixed outer ring, and the sun ribs are used to connect the fixed inner ring and the fixed outer ring.

8. The sealing connection mechanism for the roller brush motor according to claim 1, characterized in that: The sealing element is provided with a sealing inner ring, the inner diameter of which is fitted onto the outer diameter of the fixed shaft. The sealing abutment portion is inclined from the sealing inner ring toward the end cover, and the end of the sealing abutment portion is used for sealing between the end cover and the rotating connecting element.

9. The sealing connection mechanism for the roller brush motor according to claim 8, characterized in that: The sealing element is provided with a protective cover, which includes a sealing fastening part and a protective outer edge. The sealing fastening part is fastened to the sealing inner ring, and the protective outer edge is provided on the outer edge of the sealing fastening part and extends toward the end cap.

10. The sealing connection mechanism for the roller brush motor according to claim 9, characterized in that: The outer edge of the protective structure is inclined, and its end is close to the end cap.

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