A silent motor for a robotic vacuum cleaner

Abstract

This application relates to the field of robotic vacuum cleaner technology, and in particular to a silent motor for robotic vacuum cleaners, comprising a motor body and a noise reduction component. The noise reduction component is connected to the motor body via an elastic connector and includes a vibration absorption structure and a soundproof enclosure. The inner wall of the soundproof enclosure is provided with sound-absorbing sheets and filling material, and the bottom fixing bracket ensures installation accuracy through positioning pins. This application significantly reduces noise through the synergistic effect of vibration damping pads, sound-absorbing sheets, and elastic connectors, and adopts a split soundproof enclosure for easy maintenance while optimizing heat dissipation performance. This utility model solves the problems of complex noise reduction, high cost, and insufficient heat dissipation in existing motors, providing technical support for the miniaturization design of robotic vacuum cleaners.

Description

Technical Field

[0001] This utility model belongs to the technical field of household appliances and electromechanical equipment, specifically a silent motor for a sweeping robot. Background Technology

[0002] In the design and use of robotic vacuum cleaners, the quietness of the motor is one of the important indicators for evaluating user experience. Currently, some technical solutions have emerged on the market to reduce operating noise by optimizing the motor structure or adding noise-reducing materials. However, these solutions often have a certain impact on the overall performance of the motor and are also more expensive to manufacture. In addition, these technologies may require additional space to arrange noise-reducing components in practical applications, thus limiting the miniaturization design of the device.

[0003] For example, one existing technology achieves noise reduction by adding a sound insulation layer inside the motor housing. This design includes a motor body, a mounting bracket, and multiple layers of sound-absorbing material wrapped around the housing. The mounting bracket is connected to the motor body via an elastic connector to reduce vibration transmission. While this design can reduce noise to some extent, it increases the complexity of the overall structure due to the added materials and assembly processes, and places higher demands on the heat dissipation performance of the housing.

[0004] Therefore, we made improvements and proposed a silent motor for sweeping robots. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the motors of current robotic vacuum cleaners are noisy during operation, and that noise reduction design is complex and manufacturing costs are high.

[0006] To achieve the aforementioned objectives and address the aforementioned problems, this utility model provides a silent motor for a robotic vacuum cleaner, comprising a motor body and a noise reduction component. The noise reduction component is connected to the motor body via an elastic connector. The noise reduction component includes a vibration absorption structure and a sound insulation cover. The vibration absorption structure is located outside the motor body, and the sound insulation cover surrounds the vibration absorption structure. The inner wall of the sound insulation cover has several evenly distributed sound-absorbing sheets, forming multiple cavities filled with sound-absorbing material. A fixed bracket is located at the bottom of the motor body, and the fixed bracket is threadedly connected to the motor body. A mounting plate is located at the bottom of the fixed bracket, and the mounting plate has multiple mounting holes for connecting to the robotic vacuum cleaner housing.

[0007] The vibration absorption structure includes multiple arc-shaped support bars, which are evenly distributed along the circumference of the motor body. One end of each arc-shaped support bar is fixedly connected to the outer shell of the motor body, and the other end is fixedly connected to the inner wall of the sound insulation cover. A shock-absorbing pad is provided in the middle of each arc-shaped support bar. The shock-absorbing pad is made of flexible material and can effectively reduce the vibration transmission during motor operation.

[0008] As a preferred technical solution of this application, the soundproof cover includes two symmetrically arranged half-covers. The edges of the half-covers are provided with connecting flanges, and multiple threaded holes are opened on the connecting flanges. The two half-covers are fixedly connected by bolts passing through the threaded holes. A buffer layer is provided between the inner wall of the soundproof cover and the sound-absorbing sheet. The buffer layer is made of porous material and can further absorb vibration energy.

[0009] As a preferred technical solution of this application, the sound-absorbing sheet is wavy, and multiple grooves are formed between the crests and troughs of the sound-absorbing sheet. The grooves are filled with sound-absorbing material, and the surface of the sound-absorbing sheet is coated with a dustproof coating to prevent dust from entering and affecting the sound absorption effect. The dustproof coating is a water-based conductive coating of single-walled carbon nanotubes in the CSF-WFA system. It adopts single-walled carbon nanotube (SWCNT) technology to form a dense conductive network, avoids static electricity adsorption of dust, and has a smooth surface that is not easy to accumulate dirt.

[0010] As a preferred technical solution of this application, the fixed bracket includes a plurality of vertically arranged support columns. The top of the support column is welded and fixed to the bottom of the motor body, the bottom of the support column is fixedly connected to the mounting plate, and the middle of the support column is provided with a reinforcing rib. The two ends of the reinforcing rib are welded and fixed to the support column and the mounting plate respectively, so as to improve the stability of the overall structure.

[0011] As a preferred technical solution of this application, the bottom surface of the mounting plate is provided with a plurality of positioning pins, which are used in conjunction with positioning holes on the housing of the sweeping robot to ensure the accuracy of motor installation.

[0012] As a preferred technical solution of this application, the elastic connector includes multiple springs. One end of each spring is fixedly connected to the outer shell of the motor body, and the other end is fixedly connected to the inner wall of the soundproof cover. A damper is provided in the middle of each spring. The damper is made of rubber material, which can further reduce vibration transmission.

[0013] As a preferred technical solution of this application, the outer shell surface of the motor body is provided with multiple heat dissipation fins. The heat dissipation fins are evenly distributed along the axial direction of the motor body. The surface of the heat dissipation fins is coated with a thermally conductive coating to improve heat dissipation efficiency. The thermally conductive coating is ZS-1041 wear-resistant and corrosion-resistant thermally conductive coating. The filler contains nano-silicon carbide and graphite (thermal conductivity > 100 W / m·K). The thermal conductivity of the coating is ≥ 2.5 W / m·K, which improves the thermal radiation efficiency of the heat dissipation fins and takes into account both heat dissipation and mechanical protection.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Through the vibration absorption structure and soundproof enclosure, the vibrations generated by the motor during operation are first absorbed by the damping pads on the arc-shaped support strips, and then further isolated by the sound-absorbing sheets and filling materials inside the soundproof enclosure, thus significantly reducing the noise level of the motor during operation. Furthermore, the soundproof enclosure adopts a split design, facilitating disassembly and maintenance, while the wave-shaped structure and dust-proof coating of the sound-absorbing sheets effectively extend its service life. The fixed bracket improves the overall structural stability through the design of support columns and reinforcing ribs, while the positioning pins on the mounting plate ensure the precision of motor installation. The springs and dampers in the elastic connector work together to further reduce vibration transmission, thereby improving the overall performance of the motor. This invention solves the problems of complex motor noise reduction design, high manufacturing cost, and insufficient heat dissipation performance in existing technologies, providing technical support for the miniaturization design of robotic vacuum cleaners. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the noise reduction component of this utility model.

[0018] Figure 3 This is an exploded view of the soundproof cover of this utility model.

[0019] Figure 4 This is a schematic diagram of the sound-absorbing sheet structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the fixed support structure of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. Motor body; 2. Noise reduction components; 3. Elastic connectors; 4. Vibration absorption structure; 5. Sound insulation enclosure; 6. Sound-absorbing sheet; 7. Cavity; 8. Fixing bracket; 9. Mounting plate; 10. Arc-shaped support bar; 11. Vibration damping pad; 12. Half enclosure; 13. Connecting flange; 14. Buffer layer; 15. Support column; 16. Reinforcing rib; 17. Positioning pin; 18. Spring; 19. Damper; 20. Heat dissipation fins. Detailed Implementation

[0023] This utility model provides a silent motor for a sweeping robot, the overall structure of which is as follows: Figure 1 As shown, the invention includes a motor body 1, a noise reduction component 2, an elastic connector 3, a fixing bracket 8, and a mounting plate 9. The specific embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0024] The motor body 1 is the core component of this silent motor. It is externally equipped with a vibration absorption structure 4 and a sound insulation cover 5. The vibration absorption structure 4 and the sound insulation cover 5 work together to reduce vibration and noise during operation. Specifically, the vibration absorption structure 4 includes multiple arc-shaped support bars 10, which are evenly distributed along the circumference of the motor body 1. One end of each arc-shaped support bar 10 is fixedly connected to the outer shell of the motor body 1, and the other end is fixedly connected to the inner wall of the sound insulation cover 5. A shock-absorbing pad 11 is provided in the middle of each arc-shaped support bar 10. The shock-absorbing pad 11 is made of flexible material and can effectively absorb the vibration generated during motor operation. The sound insulation cover 5 wraps around the outside of the vibration absorption structure 4, and its inner wall is provided with several evenly distributed sound-absorbing sheets 6, such as… Figure 2 As shown in the diagram, multiple cavities 7 are formed between the sound-absorbing sheets 6. The cavities 7 are filled with sound-absorbing material to further isolate noise. The structure of the sound-absorbing sheet 6 is as follows: Figure 4 As shown, it features a wave-like design with multiple grooves formed between the crests and troughs. The grooves are also filled with sound-absorbing material, and the surface is coated with a dustproof coating to prevent dust from entering and affecting the sound absorption effect. The dustproof coating is a CSF-WFA system water-based conductive coating of single-walled carbon nanotubes, which uses single-walled carbon nanotube (SWCNT) technology to form a dense conductive network, avoiding static electricity adsorption of dust, and the surface is smooth and not easy to accumulate dirt.

[0025] The soundproof enclosure 5 is designed with a split structure, such as... Figure 3As shown, the soundproof enclosure 5 includes two symmetrically arranged semi-enclosures 12. Each semi-enclosure 12 has a connecting flange 13 on its edge, and multiple threaded holes are formed on the connecting flange 13. The two semi-enclosures 12 are fixedly connected by bolts passing through the threaded holes. A buffer layer 14 is also provided between the inner wall of the soundproof enclosure 5 and the sound-absorbing sheet 6. The buffer layer 14 is made of porous material to further absorb vibration energy and enhance the noise reduction effect. The soundproof enclosure 5 is connected to the motor body 1 through an elastic connector 3. The elastic connector 3 includes multiple springs 18. One end of the spring 18 is fixedly connected to the outer shell of the motor body 1, and the other end is fixedly connected to the inner wall of the soundproof enclosure 5. A damper 19 is provided in the middle of the spring 18. The damper 19 is made of rubber material and can further reduce vibration transmission during motor operation.

[0026] The bottom of the motor body 1 is provided with a fixed bracket 8, the structure of which is as follows: Figure 5 As shown, the system includes multiple vertically arranged support columns 15. The top of each support column 15 is welded and fixed to the bottom of the motor body 1, and the bottom is fixedly connected to the mounting plate 9. A reinforcing rib 16 is provided in the middle of each support column 15, and both ends of the reinforcing rib 16 are welded and fixed to both the support column 15 and the mounting plate 9, thereby improving the stability of the overall structure. The mounting plate 9 has multiple mounting holes for connecting to the robot vacuum cleaner housing. The bottom surface of the mounting plate 9 also has multiple positioning pins 17, which cooperate with the positioning holes on the robot vacuum cleaner housing to ensure accurate motor installation.

[0027] The outer casing of the motor body 1 is provided with multiple heat dissipation fins 20, which are evenly distributed along the axial direction of the motor body 1. Their surfaces are coated with a thermally conductive coating to improve heat dissipation efficiency. The design of the heat dissipation fins 20 not only helps to reduce the temperature during motor operation, but also improves the overall performance of the motor.

[0028] In practical applications, when the robotic vacuum cleaner starts, the motor body 1 begins to operate. Since motor operation inevitably generates vibration and noise, the vibration absorption structure 4 comes into play first. The shock-absorbing pads 11 on the arc-shaped support bar 10 absorb most of the vibration energy, while the sound-absorbing sheets 6 and filling material inside the soundproof enclosure 5 further isolate noise. The split design of the soundproof enclosure 5 facilitates disassembly and maintenance, while the wave-shaped structure and dust-proof coating of the sound-absorbing sheets 6 extend their service life. The fixed bracket 8 improves the overall structural stability through the design of the support columns 15 and reinforcing ribs 16, while the positioning pins 17 on the mounting plate 9 ensure the accuracy of motor installation. The springs 18 and dampers 19 in the elastic connector 3 work together to further reduce vibration transmission, thereby improving the overall performance of the motor.

[0029] In the application scenarios of robotic vacuum cleaners, the noise reduction effect of this silent motor is significant, solving the problems of complex noise reduction design, high manufacturing cost and insufficient heat dissipation performance of existing motors, and providing technical support for the miniaturization design of robotic vacuum cleaners.

[0030] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0031] During the operation of the robotic vacuum cleaner, vibration and noise are initially generated when the motor starts. At this time, the vibration absorption structure 4 begins to function. The arc-shaped support bar 10 absorbs vibration energy through its flexible material damping pad 11. The flexibility of the damping pad 11 allows it to convert vibration energy into heat energy for dissipation, thereby reducing the transmission of vibration to the sound insulation cover 5. The design of the arc-shaped support bar 10 being evenly distributed around the motor body 1 ensures uniform vibration absorption and avoids noise problems caused by excessive local vibration.

[0032] As vibrations are initially absorbed, the sound-absorbing sheets 6 inside the soundproof enclosure 5 further function. The sound-absorbing sheets 6 have a wave-like design, with grooves formed between the crests and troughs filled with sound-absorbing material. This material effectively captures sound waves and converts sound energy into heat energy through internal friction. The dust-proof coating on the surface of the sound-absorbing sheets 6 not only prevents dust from entering and affecting the sound absorption effect but also extends the service life of the sound-absorbing sheets 6. The split design of the soundproof enclosure 5 allows the two half-enclosures 12 to be quickly disassembled and maintained via threaded holes on the connecting flange 13, facilitating user replacement or cleaning of the sound-absorbing sheets 6.

[0033] Meanwhile, the presence of buffer layer 14 further enhances the noise reduction effect. Buffer layer 14 is made of porous material, and its internal micropores can absorb residual vibration energy and reduce vibration amplitude through air damping. This multi-layered noise reduction design ensures that noise during motor operation is isolated to the greatest extent possible.

[0034] The fixed bracket 8 improves the overall structural stability through the design of the support column 15 and the reinforcing rib 16. When the motor body 1 is running, the support column 15 evenly distributes the weight of the motor onto the mounting plate 9, while the reinforcing rib 16 further strengthens the rigid connection between the support column 15 and the mounting plate 9, preventing structural loosening due to motor vibration. The positioning pin 17 on the bottom surface of the mounting plate 9 precisely matches the positioning hole on the robot vacuum cleaner shell, ensuring the accuracy of the motor installation position and thus avoiding additional vibration caused by installation deviation.

[0035] The spring 18 and damper 19 in the elastic connector 3 work together to further reduce vibration transmission. The spring 18 absorbs part of the vibration energy through its elastic deformation, while the damper 19 converts the vibration energy into heat energy through the internal friction of the rubber material. This dual vibration reduction mechanism significantly reduces the vibration transmission efficiency during motor operation, thereby improving the overall performance of the motor.

[0036] The heat dissipation fins 20 play a crucial role in heat dissipation during motor operation. The design of the heat dissipation fins 20, evenly distributed along the axial direction of the motor body 1, increases the heat dissipation area. The thermally conductive coating on their surface further improves heat transfer efficiency. This coating is a ZS-1041 wear-resistant and corrosion-resistant thermally conductive paint, with fillers containing nano-silicon carbide and graphite (thermal conductivity > 100 W / m·K). The coating's thermal conductivity is ≥ 2.5 W / m·K, enhancing the heat radiation efficiency of the heat dissipation fins while balancing heat dissipation and mechanical protection. In this way, the heat generated during motor operation can be quickly dissipated into the surrounding environment, preventing performance degradation or damage due to excessive temperature.

[0037] In summary, this invention achieves efficient noise reduction and stable operation of the silent motor in a robotic vacuum cleaner through the synergistic effect of the vibration absorption structure 4, the sound insulation cover 5, the elastic connector 3, the fixed bracket 8, and the heat dissipation fins 20. This design not only solves the problems of complex and costly noise reduction in existing technologies, but also provides technical support for the miniaturization design of robotic vacuum cleaners.

Claims

1. A silent motor for a robotic vacuum cleaner, characterized in that, The system includes a motor body (1) and a noise reduction component (2). The noise reduction component (2) is connected to the motor body (1) via an elastic connector (3). The noise reduction component (2) includes a vibration absorption structure (4) and a sound insulation cover (5). The vibration absorption structure (4) is located outside the motor body (1). The sound insulation cover (5) is wrapped around the outside of the vibration absorption structure (4). The inner wall of the sound insulation cover (5) is provided with several evenly distributed sound-absorbing sheets (6). Multiple cavities (7) are formed between the sound-absorbing sheets (6). The cavities (7) are filled with sound-absorbing material. The bottom of the motor body (1) is provided with a fixed bracket (8). The fixed bracket (8) is fixed to the motor body (1) by a threaded connection. The bottom end of the fixed bracket (8) is provided with a mounting plate (9). The mounting plate (9) has multiple mounting holes for connecting with the housing of the sweeping robot.

2. The silent motor for a sweeping robot according to claim 1, characterized in that, The vibration absorption structure (4) includes multiple arc-shaped support bars (10), which are evenly distributed along the circumference of the motor body (1). One end of the arc-shaped support bar (10) is fixedly connected to the outer shell of the motor body (1), and the other end is fixedly connected to the inner wall of the sound insulation cover (5). A shock-absorbing pad (11) is provided in the middle of the arc-shaped support bar (10).

3. The silent motor for a sweeping robot according to claim 1, characterized in that, The soundproof cover (5) includes two symmetrically arranged half-covers (12). The edges of the half-covers (12) are provided with connecting flanges (13). Multiple threaded holes are provided on the connecting flanges (13). The two half-covers (12) are fixedly connected by bolts passing through the threaded holes. A buffer layer (14) is provided between the inner wall of the soundproof cover (5) and the sound-absorbing sheet (6).

4. A silent motor for a sweeping robot according to claim 1, characterized in that, The sound-absorbing sheet (6) is wavy, and multiple grooves are formed between the peaks and troughs of the sound-absorbing sheet (6). The grooves are filled with sound-absorbing material, and the surface of the sound-absorbing sheet (6) is coated with a dustproof coating.

5. A silent motor for a sweeping robot according to claim 1, characterized in that, The fixed bracket (8) includes a plurality of vertically arranged support columns (15). The top of the support column (15) is welded and fixed to the bottom of the motor body (1). The bottom of the support column (15) is fixedly connected to the mounting plate (9). The middle part of the support column (15) is provided with reinforcing ribs (16).

6. A silent motor for a sweeping robot according to claim 1, characterized in that, The bottom surface of the mounting plate (9) is provided with a plurality of positioning pins (17), which are used in conjunction with positioning holes on the housing of the sweeping robot.

7. A silent motor for a sweeping robot according to claim 1, characterized in that, The elastic connector (3) includes multiple springs (18). One end of each spring (18) is fixedly connected to the outer shell of the motor body (1), and the other end is fixedly connected to the inner wall of the soundproof cover (5). A damper (19) is provided in the middle of each spring (18).

8. A silent motor for a sweeping robot according to claim 1, characterized in that, The outer shell surface of the motor body (1) is provided with a plurality of heat dissipation fins (20), the heat dissipation fins (20) are evenly distributed along the axial direction of the motor body (1), and the surface of the heat dissipation fins (20) is coated with a thermally conductive coating.

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