New energy automobile driving motor sound absorption and noise reduction structure

Abstract

The utility model discloses a sound absorption and noise reduction structure for a driving motor of a new energy automobile. The sound absorption and noise reduction structure comprises a front end cover, an inner shell, an outer shell and a rear end cover which are arranged on the motor, a combination body of the front end cover, the inner shell, the outer shell and the rear end cover can completely wrap the motor; the front end cover and the rear end cover are mounted on the inner shell, and mounting holes are formed in the front end cover, the rear end cover and the inner shell; the outer shell is mounted on the front end cover, the rear end cover and the inner shell; a plurality of groups of hollow double-layer channels are arranged in the wall body of the inner shell; the outer shell is formed by stacking a plurality of layers of sound absorbing materials, sound insulation materials and scratch-proof materials, and a hollow structure is arranged between the sound absorbing materials and the sound insulation materials. According to the invention, the driving motor of the new energy vehicle has good NVH performance, and the riding comfort and subjective evaluation of the new energy vehicle are ensured to be good.

Description

Technical Field

[0001] The utility model belongs to the technical field of drive motors, and in particular relates to a sound absorption and noise reduction structure of a drive motor for a new energy vehicle. Background Art

[0002] At present, with the continuous maturity of electric drive products of new energy vehicles, the NVH performance of products has also attracted much attention. The market and users have put forward higher requirements for the comfort and subjective evaluation of new energy vehicles, that is, the NVH performance of electric drive products; the drive motor of new energy vehicles is usually composed of a stator, a rotor, an end cover and a housing. The dimensional accuracy and assembly process of motor parts will affect the NVH performance and noise performance of the product after installation. The industry has also optimized the NVH performance and noise performance of products by ensuring the dimensional accuracy of parts and improving the assembly process. Summary of the invention

[0003] The utility model provides a sound absorption and noise reduction structure for a new energy vehicle driving motor. Compared with conventional motors, it absorbs and blocks noise from a structural perspective by setting an inner shell and an outer shell, thereby improving and optimizing the NVH performance and noise performance of the product.

[0004] The technical solution adopted by the utility model is: a sound absorption and noise reduction structure of a new energy vehicle driving motor, comprising a front end cover, an inner shell, an outer shell and a rear end cover installed on the motor; the combination of the front end cover, the inner shell, the outer shell and the rear end cover can completely wrap the motor; the front end cover and the rear end cover are installed on the inner shell, and the front end cover, the rear end cover and the inner shell are all provided with mounting holes; the outer shell is installed on the front end cover, the rear end cover and the inner shell; a plurality of groups of hollow double-layer channels are provided inside the wall of the inner shell.

[0005] Furthermore, the double-layer channel in the inner shell includes an inner channel and an outer channel; the inner channel is connected to cooling water, and the outer channel contains an air layer or is filled with sound insulation material.

[0006] Furthermore, an avoidance groove is provided on the outer shell, and the outer shell is a split structure, which is convenient for installation on the front cover, the rear cover and the inner shell.

[0007] Furthermore, the outer shell is composed of several layers of sound-absorbing material, sound-insulating material and anti-scratch material, and a hollow structure is provided between the sound-absorbing material and the sound-insulating material.

[0008] The beneficial effects of the utility model are as follows: the utility model can effectively improve the NVH performance and noise performance of the drive motor of new energy vehicles. Compared with other solutions, the utility model has high reliability and safety, and does not affect the consistency and functionality of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural cross-sectional view of the motor in the utility model;

[0010] Figure 2 This is a schematic diagram of the motor structure in the utility model;

[0011] Figure 3 This is a schematic diagram of the inner shell structure in the utility model;

[0012] Figure 4 This is a schematic diagram of the outer shell structure of the utility model;

[0013] In the figure: 1-rotating shaft, 2-front end cover, 3-inner housing, 31-inner channel, 32-outer channel, 4-outer housing, 5-stator, 6-rotor, 7-rear end cover, 8-bearing. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] like Figure 1 and Figure 2 As shown, the utility model is a sound absorption and noise reduction structure of a new energy vehicle driving motor, which is installed on the outside of the basic motor structure composed of a rotating shaft 1, a stator 5, a rotor 6 and a bearing 8, and includes a front cover 2, an inner housing 3, an outer housing 4 and a rear cover 7. The combination formed by the front cover 2, the inner housing 3, the outer housing 4 and the rear cover 7 can completely wrap the motor; the front cover 2 and the rear cover 7 are installed on the inner housing 3, and the front cover 2, the rear cover 3 and the inner housing 7 are all provided with mounting holes for installing the outer housing 4. The outer housing 4 is provided with an avoidance groove, and the outer housing is a split structure, which is convenient for installation on the front cover 2, the rear cover 3 and the inner housing 7.

[0016] like Figure 3 As shown, a plurality of groups of hollow double-layer channels are provided inside the wall of the inner shell 3, and the double-layer channels in the inner shell 3 include an inner channel 31 and an outer channel 32; the inner channel 31 is connected to cooling water to achieve the effect of cooling the motor, and the outer channel 32 is filled with an air layer or sound insulation material to achieve the purpose of sound insulation and noise reduction.

[0017] like Figure 4 As shown, the outer shell 4 is composed of a multi-layer composite material, including several layers of sound-absorbing material, sound-insulating material and anti-scratch material. The sound-absorbing material adopts sound-absorbing cotton or foam, the sound-insulating material is such as EPDM, EVA or felt, and the anti-scratch material is such as aluminum foil. A hollow structure is provided between the sound-absorbing material and the sound-insulating material, which can further eliminate and improve the motor noise.

[0018] The utility model absorbs and blocks the sound generated by the motor from the perspective of the motor structure, and reduces the noise decibel value of the motor from multiple media and aspects by arranging an inner shell 3 and an outer shell 4 of different structural forms, thereby achieving the purpose of improving and optimizing the NVH performance and noise performance of the product.

Claims

1. A sound absorption and noise reduction structure for a new energy vehicle driving motor, characterized in that: It includes a front end cover, an inner shell, an outer shell and a rear end cover installed on the motor; the combination of the front end cover, the inner shell, the outer shell and the rear end cover can completely wrap the motor; the front end cover and the rear end cover are installed on the inner shell, and the front end cover, the rear end cover and the inner shell are all provided with mounting holes; the outer shell is installed on the front end cover, the rear end cover and the inner shell; a plurality of groups of hollow double-layer channels are provided inside the wall of the inner shell.

2. The sound absorption and noise reduction structure of a new energy vehicle driving motor according to claim 1 is characterized in that: The double-layer channel in the inner shell includes an inner channel and an outer channel; the inner channel is connected to cooling water, and the outer channel contains an air layer or is filled with sound insulation material.

3. The sound absorption and noise reduction structure of a new energy vehicle driving motor according to claim 1 is characterized in that: The outer shell is provided with an avoidance groove, and the outer shell is a split structure, which is convenient for installation on the front cover, the rear cover and the inner shell.

4. The sound absorption and noise reduction structure of a new energy vehicle driving motor according to claim 1 is characterized in that: The outer shell is composed of several layers of sound-absorbing material, sound-insulating material and anti-scratch material, and a hollow structure is provided between the sound-absorbing material and the sound-insulating material.

Images