Noise reduction structure of motor
By employing a multi-layered noise reduction structure in the vacuum cleaner motor, including a sound-absorbing component in an annular groove and a noise-reducing sleeve with a conical hole, the problems of high motor noise and complex structure are solved, achieving efficient noise reduction while reducing manufacturing difficulty and cost.
Patent Information
- Application Number
- CN202423322312.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing vacuum cleaner motors are noisy, and existing noise reduction methods are generally ineffective and increase the complexity and cost of the motor housing structure.
It adopts a multi-stage noise reduction structure, including a first silencer in an annular groove and a noise reduction sleeve with cone-shaped holes, combined with an air outlet cover and a second silencer, to achieve multiple noise reductions for airflow.
It achieves good noise reduction effect, while its simple structure reduces processing difficulty and cost.
Smart Images
Figure CN223872133U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of motor technology, and in particular to a noise reduction structure for a motor. Background Technology
[0002] Vacuum cleaners primarily utilize the suction power generated by the high-speed rotation of a motor to remove dust and debris. The motor shaft of a vacuum cleaner contains an impeller. During operation, the suction and pressure force expel air, while the suction section at the front of the motor continuously replenishes it, creating a momentary vacuum inside. This negative pressure difference, combined with the external atmospheric pressure, draws in dust-laden air. However, the motor generates considerable noise during operation. Current vacuum cleaner noise reduction methods are relatively simple, often relying on sound-absorbing foam, but the overall noise reduction effect is generally limited. Other methods involve modifying the airflow channels within the motor housing, such as adding a silencing chamber or ductwork, which can lead to complex motor housing designs, increased manufacturing difficulty, and higher costs. Utility Model Content
[0003] The purpose of this utility model is to solve the above-mentioned technical problems and provide a noise reduction structure for a motor. The motor of this application has multiple noise reduction structures, which are simple and reasonable, and have a good noise reduction effect.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows:
[0005] A noise reduction structure for an electric motor includes a motor mounted in a mounting groove inside a motor housing. The motor housing surrounds the mounting groove with a connected annular groove. A first silencing component surrounding an air outlet is mounted in the annular groove. A noise-reducing sleeve composed of a plurality of conical holes is connected to the open side of the annular groove. An air outlet cover is connected to the outer side of the noise-reducing sleeve. The air outlet cover contracts on its air outlet side to form an air outlet. A second silencing component surrounds the air outlet. The airflow output by the motor enters the annular groove through the air outlet, flows through the noise-reducing sleeve, and then flows out through the air outlet.
[0006] In this application, the airflow output by the motor installed inside the motor cover flows out through the annular groove on the outer periphery of the motor cover. In the annular groove, the first noise reduction effect is achieved under the silencing effect of the first silencing component. The noise reduction sleeve connected to the annular groove has a conical hole. After the airflow is output through the conical hole, it undergoes further noise reduction and is then output through the constricted air outlet, achieving a second noise reduction effect in the second silencing component. Thus, a good noise reduction effect is achieved after multiple noise reductions. Moreover, the overall noise reduction structure is compact and reasonable, does not require a lot of installation space, and has a simple structure, reducing processing difficulty and cost, and has high noise reduction efficiency.
[0007] In one embodiment, one side of the air outlet cover extends forward to form a horn-shaped air outlet, and the second silencer is fitted onto the air outlet.
[0008] In one embodiment, the noise reduction sleeve includes a noise reduction panel and a connecting wall extending to one side; the motor cover is provided with a mating groove on the outer peripheral side wall of the noise reduction sleeve, and the end of the connecting wall is provided with a corresponding mating rib, the mating rib being embedded in the mating groove, and the connecting surface being flush.
[0009] In one embodiment, the noise reduction panel is formed by a plurality of cone holes arranged in a honeycomb pattern, with the smaller diameter side of the cone holes facing the air outlet.
[0010] In one embodiment, a limiting post extends from the middle of the motor cover and is inserted into the noise reduction sleeve.
[0011] In one embodiment, the sidewall of the mounting groove is provided with an air outlet, and the annular groove is connected to the mounting groove through the air outlet; a step is provided in the middle of the annular groove so that there is a gap between the first silencer and the sidewall of the annular groove on the opening side.
[0012] In one embodiment, the device further includes a mounting shell and an air inlet cover. The motor cover, the noise reduction sleeve, and the air outlet cover are all installed in the inner cavity of the mounting shell. The air inlet cover is connected to the air inlet side of the motor cover and covers the mounting groove.
[0013] In one embodiment, an air outlet channel is provided on one side of the mounting housing, the air outlet cover is installed inside the mounting housing, and the air outlet is connected to the air outlet channel; the second silencer is located in the air outlet cavity formed between the air outlet and the air outlet channel.
[0014] In one embodiment, shock-absorbing pads are provided at both ends of the motor.
[0015] In one embodiment, the first and second noise-absorbing components are made of noise-absorbing cotton. Attached Figure Description
[0016] Figure 1 A cross-sectional view of the overall structure of the noise reduction structure for the motor provided by this utility model;
[0017] Figure 2 An exploded view of the noise reduction structure provided by this utility model;
[0018] Figure 3 A cross-sectional view of the motor cover and noise reduction sleeve provided by this utility model;
[0019] Figure 4A schematic diagram of the structure of the motor cover provided by this utility model;
[0020] Figure 5 Structural cross-sectional view of the mounting shell and air outlet cover provided by this utility model;
[0021] Figure 6 A schematic diagram of the mounting shell provided by this utility model. Detailed Implementation
[0022] This application provides a noise reduction structure for a motor, which addresses the technical problems that existing motor noise reduction methods often rely on sound-absorbing foam, but the overall noise reduction effect is generally poor. Alternatively, improving the airflow channels inside the motor housing, such as by installing a sound-absorbing chamber or airflow ducts, can easily lead to complex motor housing structure design, increased manufacturing difficulty, and higher costs.
[0023] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0024] Please see Figures 1 to 6 This application provides a noise reduction structure for a motor. The motor 10 is installed in a mounting groove 21 inside a motor cover 20. The motor cover 20 surrounds the mounting groove 21 and has a communicating annular groove 22. A first silencing component 30 surrounding an air outlet 211 is installed in the annular groove 22. A noise reduction sleeve 40 composed of a plurality of conical holes is connected to the open side of the annular groove 22. An air outlet cover 50 is connected to the outer side of the noise reduction sleeve 40. The air outlet cover 50 is narrowed on the air outlet side to form an air outlet 51. A second silencing component 60 is surrounded by the air outlet 51. The airflow output by the motor 10 enters the annular groove 22 through the air outlet 211, flows through the noise reduction sleeve 40, and then flows out through the air outlet 51.
[0025] Specifically, the inner cavity of the motor cover 20 forms a mounting groove 21 for mounting the motor 10, with the opening side being the air intake side. The outer periphery of the motor cover 20 extends an annular wall to the side opposite to the opening of the mounting groove 21, forming an annular groove 22. The annular groove 22 communicates with the mounting groove 21 through an air outlet 211. A first noise-reducing component 30 of matching size is placed inside the annular groove 22, so that the output airflow is noise-reduced when passing through the annular groove 22. The main body of the noise-reducing sleeve 40 is composed of several conical holes arranged together, with one side connecting to the opening of the annular groove 22, so that all the airflow after the first noise reduction flows out through the conical holes for secondary noise reduction. The air outlet cover 50 and the noise-reducing sleeve 40 are connected. The noise-reducing sleeve 40 is connected, allowing airflow to be output from the contracted air outlet 51. During the output process, the change in the diameter of the air outlet 51 has a certain noise reduction effect. After the airflow is output, it flows through the second noise-reducing component 60 for further noise reduction. Thus, there are multiple noise reduction effects in the airflow output duct. In this embodiment, the first noise-reducing component 30 and the second noise-reducing component 60 are made of sound-absorbing cotton. The structure is simple and the noise reduction effect is good. The overall noise reduction structure of the motor 10 is reasonable and compact. It does not require setting a long air duct to achieve the noise reduction effect. By using the connection of the noise-reducing sleeve 40, the noise reduction effect is effectively achieved. The installation is simple and reduces the processing cost and difficulty.
[0026] Furthermore, one side of the air outlet cover 50 extends forward to form a trumpet-shaped air outlet 51, and the second silencer 60 is sleeved on the air outlet 51. One side wall of the air outlet cover 50 is connected to the multi-cone sleeve, and the other side extends towards the center and tapers to form a trumpet-shaped air outlet 51, and the taper part is arc-shaped, so that the airflow output achieves a noise reduction effect.
[0027] Furthermore, the noise reduction sleeve 40 includes a noise reduction panel 41 and a connecting wall 42 extending to one side; the motor cover 20 has a mating groove 23 on the outer peripheral sidewall of the noise reduction sleeve 40, and the end of the connecting wall 42 has a corresponding mating rib 421, which is embedded in the mating groove 23, and the connecting surfaces are flush. The noise reduction panel 41 is formed by a plurality of conical holes arranged in a honeycomb pattern, with the smaller diameter side of the conical holes facing the air outlet 51. The middle part of the noise reduction sleeve 40 is a honeycomb-shaped multi-conical noise reduction panel 41. The large-diameter end of the conical hole faces the motor 10 side, and the small-diameter end faces the air outlet 51 side. The surrounding area of the noise reduction panel 41 extends to form a connecting wall 42. The end of the connecting wall 42 is provided with an annular docking rib 421. The motor cover 20 is provided with a docking groove 23 on the outer side wall end of the annular groove 22. During installation, the docking rib 421 is fitted into the docking groove 23, so that the two can be fully docked and the connecting surface is flush. This ensures that the airflow through the annular groove 22 does not easily leak out when flowing through the noise reduction sleeve 40 and generate noise, thus affecting the noise reduction effect.
[0028] Furthermore, a limiting post 24 extends from the middle of the motor cover 20, and the limiting post 24 is inserted into the noise reduction sleeve 40. The limiting post 24 extends from the end face of the motor cover 20 on the side closest to the noise reduction sleeve 40; the noise reduction panel 41 of the noise reduction sleeve 40 has holes corresponding to the limiting post 24, and the limiting post 24 is inserted into the holes and fixed by a threaded connection, allowing for quick connection and installation with the noise reduction sleeve 40, facilitating assembly and disassembly.
[0029] See Figure 3 The mounting groove 21 has an air outlet 211 on its side wall, and the annular groove 22 communicates with the mounting groove 21 through the air outlet 211. A step 221 is provided in the middle of the annular groove 22, creating a gap between the first silencer 30 and the side wall of the annular groove 22 near the opening. The mounting groove 21 has a grid-like air outlet 211 on its side wall near the air outlet of the motor 10, allowing the airflow from the motor 10 to be output through the air outlet 211. A step 221 is provided in the middle of the outer side wall of the annular groove 22, making the radial dimension near the end larger than the radial dimension at the bottom. The first silencer 30, installed in the annular groove 22, has a gap between itself and the end side wall of the annular groove 22 near the opening, increasing the air outlet area of the first silencer 30 and improving air outlet efficiency.
[0030] For details, please refer to Figures 5 to 6 It also includes a mounting shell 70 and an air inlet cover 80. The motor cover 20, the noise reduction sleeve 40 and the air outlet cover 50 are all installed in the inner cavity of the mounting shell 70. The air inlet cover 80 is connected to the air inlet side of the motor cover 20 and covers the mounting groove 21. The motor cover 20, noise reduction sleeve 40, and air outlet cover 50 are connected in sequence. The mounting shell 70 is fitted onto the outside of the above three components to further limit the connection stability of the motor cover 20, noise reduction sleeve 40, and air outlet cover 50. The air inlet cover 80 covers the opening side of the mounting groove 21 and is fixed by threaded connection. The air inlet cover 80 has an air inlet in the middle, which communicates with the air inlet side of the motor 10. At the same time, the outer periphery of the air inlet cover 80 is also fixedly connected to the mounting shell 70. Shock-absorbing pads 90 are provided at both ends of the motor 10. Shock-absorbing pads 90 are embedded between the air inlet side of the motor 10 and the air inlet cover 80, and shock-absorbing pads 90 are also provided between the air outlet side and the bottom of the mounting groove 21, thereby effectively reducing the vibration of the motor 10. This makes the components installed in the inner cavity of the mounting shell 70 more stable and less likely to shift due to the vibration of the motor 10, thus affecting the noise reduction effect.
[0031] Furthermore, an air outlet channel 71 is provided on one side of the mounting housing 70, and the air outlet cover 50 is installed inside the mounting housing 70, with the air outlet 51 connected to the air outlet channel 71; the second silencer 60 is located in the air outlet cavity 52 formed between the air outlet 51 and the air outlet channel 71. The air outlet channel 71 on one side of the mounting housing 70 is connected to the air outlet 51, and the second silencer 60 is located between the air outlet channel 71 and the air outlet 51, so that the airflow output from the air outlet 51 can pass through the second silencer 60 and then be output to the outside through the air outlet channel 71. A filter is also provided inside the air outlet channel 71 to prevent dust from flowing out unfiltered. In this embodiment, the air outlet cover 50 is limited by the mounting housing 70, and the second silencer 60 is provided in the air outlet cavity 52 between the air outlet covers 50 to achieve a noise reduction effect. The structure is simple and reasonable, and the noise reduction effect is good.
[0032] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.
Claims
1. A noise reduction structure for an electric motor, wherein the motor is mounted in a mounting groove provided inside the motor cover, characterized in that; The motor cover surrounds the mounting groove and has a connected annular groove. A first silencing component surrounding the air outlet is installed in the annular groove. A noise-reducing sleeve composed of several conical holes is connected to the open side of the annular groove. An air outlet cover is connected to the outer side of the noise-reducing sleeve. The air outlet cover is narrowed on the air outlet side to form an air outlet. A second silencing component surrounds the air outlet. The airflow output by the motor enters the annular groove through the air outlet, flows through the noise-reducing sleeve, and then flows out through the air outlet.
2. The noise reduction structure for the motor according to claim 1, characterized in that, One side of the air outlet cover extends forward to form a horn-shaped air outlet, and the second silencer is fitted onto the air outlet.
3. The noise reduction structure for the motor according to claim 1, characterized in that, The noise reduction sleeve includes a noise reduction panel and a connecting wall extending to one side; the motor cover has a docking groove on the outer peripheral side wall of the noise reduction sleeve, and the end of the connecting wall has a corresponding docking rib, the docking rib is embedded in the docking groove, and the connecting surface is flush.
4. The noise reduction structure for the motor according to claim 3, characterized in that, The noise reduction panel is formed by a honeycomb arrangement of several conical holes, with the smaller diameter side of each conical hole facing the air outlet.
5. The noise reduction structure for the motor according to claim 3, characterized in that, A limiting post extends from the middle of the motor cover, and the limiting post is inserted into the noise reduction sleeve.
6. The noise reduction structure for the motor according to claim 1, characterized in that, The mounting groove has an air outlet on its side wall, and the annular groove is connected to the mounting groove through the air outlet; the annular groove has a step in the middle so that there is a gap between the first silencer and the side wall of the annular groove near the opening.
7. The noise reduction structure for the motor according to claim 1, characterized in that, It also includes a mounting shell and an air inlet cover. The motor cover, the noise reduction sleeve and the air outlet cover are all installed in the inner cavity of the mounting shell. The air inlet cover is connected to the air inlet side of the motor cover and covers the mounting groove.
8. The noise reduction structure for the motor according to claim 7, characterized in that, An air outlet channel is provided on one side of the mounting housing, the air outlet cover is installed inside the mounting housing, and the air outlet is connected to the air outlet channel; the second silencer is located in the air outlet cavity formed between the air outlet and the air outlet channel.
9. The noise reduction structure for the motor according to claim 1, characterized in that, Both ends of the motor are equipped with shock-absorbing pads.
10. The noise reduction structure for the motor according to claim 1, characterized in that, The first and second noise-absorbing components are made of noise-absorbing cotton.