Noise reduction structure applied to DC motors

Abstract

This utility model relates to a noise reduction structure for a DC motor, wherein the noise reduction structure (1) is disposed within a cavity for accommodating a commutator (2) and close to the sound source. The noise reduction structure (1) can be a honeycomb structure, a square structure, a circular structure, or a regular polygonal structure, and can be disposed on the bottom surface of the cavity, or simultaneously on the sidewalls and bottom surface of the cavity. The noise reduction structures (1) can be evenly distributed on the bottom surface and sidewalls of the cavity, or staggered. In addition, the noise reduction structure (1) can also be disposed within the cavity of a gearbox (5), including at the bottom of the gearbox cavity (6), or simultaneously on the bottom and cavity walls of the gearbox cavity (6). Using this noise reduction structure for a DC motor, the sound waves generated by the sound source are effectively reflected and canceled out by the noise reduction structure, thus reducing the noise of the DC motor and possessing certain practical value.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction components, and more particularly to noise reduction treatment of automotive parts, specifically a noise reduction structure applied to DC motors. Background Technology

[0002] With the development of the automotive industry, the requirements for noise reduction of various components are becoming increasingly stringent. As motors are one of the main sources of noise, noise reduction is particularly important. This is especially true for DC brushed motors used in automotive window regulators, such as... Figure 1 and 5 As shown, there are two main sources of noise: one is the noise generated by the friction between the carbon brush 3 and the commutator 2, and the other is the noise generated by the meshing of the worm gear 7 and worm 8. The ways to improve the noise are generally as follows: control the source of noise, change the transmission path, and suppress sound waves.

[0003] This technical solution proposes a noise reduction structure near the sound source by changing the transmission path, thereby reducing sound diffusion and improving the noise performance of the motor. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a noise reduction structure for DC motors.

[0005] To achieve the above objectives, the present invention provides a noise reduction structure for a DC motor as follows:

[0006] The main feature of this noise reduction structure applied to DC motors is that the noise reduction structure is set in a cavity for accommodating the commutator and is close to the sound source.

[0007] Preferably, the sound-absorbing structure adopts a honeycomb structure.

[0008] Preferably, the noise-absorbing structure adopts a square structure, a circular structure, or a regular polygonal structure.

[0009] Preferably, the noise-absorbing structure is only disposed on the bottom surface of the cavity.

[0010] Preferably, the noise-absorbing structure is disposed on the side wall and bottom surface of the cavity.

[0011] Preferably, each of the aforementioned sound-absorbing structures is evenly distributed on the bottom surface of the cavity.

[0012] Preferably, the various noise-absorbing structures are staggered and distributed on the bottom surface of the cavity.

[0013] Preferably, each of the aforementioned sound-absorbing structures is evenly distributed on the sidewalls and bottom surface of the cavity.

[0014] Preferably, the various noise-absorbing structures are staggered and distributed on the sidewalls and bottom surface of the cavity.

[0015] Preferably, the noise reduction structure is disposed in the inner cavity of the gearbox, including the bottom of the inner cavity of the gearbox and / or on the cavity wall of the inner cavity of the gearbox.

[0016] The noise reduction structure of this utility model, applied to a DC motor, cleverly sets up a noise reduction structure near the sound source by changing the sound source transmission path. This allows the sound waves generated by the source to be effectively reflected and canceled by the noise reduction structure, thereby reducing sound diffusion and improving the noise performance of the motor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of noise sources in the prior art.

[0018] Figure 2 This is a schematic diagram of the noise reduction structure of this utility model applied to a DC motor.

[0019] Figure 3 This is a top view of the noise reduction structure of this utility model applied to a DC motor.

[0020] Figure 4 This is a schematic diagram of another embodiment of the noise reduction structure of this utility model applied to a DC motor.

[0021] Figure 5 This is a schematic diagram of the noise reduction structure of this utility model applied to a DC motor, which is installed in the gearbox cavity.

[0022] Figure 6 This is a schematic diagram illustrating the principle of using a honeycomb structure to achieve noise reduction in a noise reduction structure for DC motors, as described in this utility model.

[0023] Figure Labels

[0024] 1. Noise reduction structure

[0025] 2 commutators

[0026] 3 carbon brushes

[0027] 4 sound sources

[0028] 5 gearbox

[0029] 6 Gearbox Cavity

[0030] 7 worm gears

[0031] 8 worm gear Detailed Implementation

[0032] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0033] Before describing the embodiments according to the present invention in detail, it should be noted that, in the following, the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] Please see Figure 2 As shown, the present invention relates to a noise reduction structure for a DC motor. The noise reduction structure 1 is disposed within a cavity for accommodating the commutator 2 and is located near the sound source 4. In practical applications, the structure or shape of the cavity is not limited; it can be cylindrical / cylindrical, hexahedral, or octahedral. It can be adaptively adjusted according to the structure of the commutator 2, as long as it can accommodate the commutator 2.

[0035] In a preferred embodiment of this utility model, the noise-absorbing structure 1 adopts a honeycomb structure.

[0036] In a preferred embodiment of this utility model, the noise-absorbing structure 1 adopts a square structure, a circular structure, or a regular polygonal structure.

[0037] In practical applications, the shape of the noise reduction structure 1 described in this technical solution can be adjusted and adapted to actual needs. Among them, when a regular hexagonal honeycomb structure is selected, the noise reduction effect that the noise reduction structure 1 can achieve is the best.

[0038] In a preferred embodiment of this utility model, the noise-absorbing structure 1 is disposed on the side wall and bottom surface of the cavity.

[0039] like Figure 4 As shown, in a preferred embodiment of this utility model, the noise-absorbing structure 1 is only provided on the bottom surface of the cavity. This noise-absorbing design on only the bottom surface facilitates demolding, and the noise-absorbing structures can also be staggered to improve the overall noise-absorbing effect.

[0040] In a preferred embodiment of this invention, each of the noise-absorbing structures 1 can be evenly distributed on the bottom surface of the cavity, or staggered on the bottom surface of the cavity. Alternatively, each of the noise-absorbing structures 1 can be evenly distributed on the side walls and bottom surface of the cavity, or staggered on the side walls and bottom surface of the cavity.

[0041] like Figure 5As shown, in another embodiment of this utility model, the noise-reducing structure 1 is disposed in the inner cavity of the gear box 5. It can be disposed only at the bottom of the gear box cavity 6, or simultaneously at the bottom and on the cavity wall of the gear box cavity 6. The design principle is the same as that for the structure disposed in the cavity accommodating the commutator 2. Furthermore, the structural design of the noise-reducing structure 1 can be a regular hexagonal honeycomb structure, or other shapes such as circles, squares, or inverted cones, and can be adapted according to actual conditions. When a regular hexagonal honeycomb structure is selected, the noise reduction effect achieved by the noise-reducing structure 1 is optimal. The arrangement of the noise-reducing structure 1 can be uniform or staggered, without restriction.

[0042] like Figure 6 The diagram shown illustrates the principle of using a regular hexagonal honeycomb structure to achieve the noise reduction effect in the noise reduction structure 1 described in this technical solution. The noise reduction effect can be best achieved under this structure.

[0043] It is understood that the above description of the embodiments is only an illustrative description of the technical solution. Other solutions that are the same as or equivalent to the implementation principle of the technical solution should be included in the inventive concept of the technical solution, and will not be described in detail here.

[0044] The noise reduction structure of this utility model, applied to a DC motor, cleverly sets up a noise reduction structure near the sound source by changing the sound source transmission path. This allows the sound waves generated by the source to be effectively reflected and canceled by the noise reduction structure, thereby reducing sound diffusion and improving the noise performance of the motor.

[0045] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A sound damping structure for a direct current motor, characterized by comprising: The noise-absorbing structure (1) is located in the cavity for accommodating the commutator (2) and close to the sound source (4).

2. The sound damping structure for a DC motor according to claim 1, characterized in that, The sound-absorbing structure (1) adopts a honeycomb structure.

3. The sound damping structure for a DC motor according to claim 1, wherein The noise-absorbing structure (1) adopts a square structure, a circular structure or a regular polygonal structure.

4. The noise reduction structure for a DC motor according to any one of claims 1 to 3, characterized in that, The noise reduction structure (1) is only provided on the bottom surface of the cavity.

5. The sound damping structure for a direct current motor according to any one of claims 1 to 3, characterized in that, The noise-absorbing structure (1) is provided on the side wall and bottom surface of the cavity.

6. The sound damping structure for a DC motor according to claim 4, wherein Each of the aforementioned noise-absorbing structures (1) is evenly distributed on the bottom surface of the cavity.

7. The sound damping structure for a DC motor according to claim 4, wherein Each of the aforementioned noise-absorbing structures (1) is staggered and distributed on the bottom surface of the cavity.

8. The sound damping structure for a DC motor according to claim 5, wherein Each of the aforementioned noise-absorbing structures (1) is evenly distributed on the sidewalls and bottom surface of the cavity.

9. The noise reduction structure for a DC motor according to claim 5, characterized in that, Each of the aforementioned silencing structures (1) is staggered and distributed on the sidewalls and bottom surface of the cavity.

10. A sound damping structure for a direct current motor, characterized by comprising: The noise reduction structure (1) is located in the inner cavity of the gear box (5), including the bottom of the gear box cavity (6) and / or the cavity wall of the gear box cavity (6).

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