CN112583194A

CN112583194A - Low-noise electric vehicle motor end cover

Info

Publication number: CN112583194A
Application number: CN202011483678.1A
Authority: CN
Inventors: 汪鹏; 马一鸣; 刘驰
Original assignee: FAW Bestune Car Co Ltd
Current assignee: FAW Bestune Car Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-03-30

Abstract

The invention belongs to the technical field of electric vehicle motor end covers, and particularly relates to a low-noise electric vehicle motor end cover; the end cover comprises an end cover body, wherein the end cover body comprises a top layer, a middle layer and a bottom layer, the top layer and the bottom layer are made of metal materials, the middle layer is made of damping materials, and the top layer and the bottom layer are fixed together in sequence; the high-frequency noise of the motor in the vehicle can be reduced.

Description

Low-noise electric vehicle motor end cover

Technical Field

The invention belongs to the technical field of electric vehicle motor end covers, and particularly relates to a low-noise electric vehicle motor end cover.

Background

With the rise of new energy industry, electric vehicles become the development trend of future automobiles. Electric vehicles, while free of engine operating noise, are more easily identified in relatively quiet environments. Especially, in the acceleration process, high-frequency noise when the rotating speed of the motor is high easily causes discomfort of passengers, and seriously influences user experience. At present, acoustic wrapping is added to the motor through a common optimization method, but the traditional motor end cover structure is formed by punching a single material, and a weak position of the traditional motor end cover structure still has large radiation noise.

Disclosure of Invention

In order to overcome the problems, the invention provides a low-noise electric vehicle motor end cover which is made of a composite material plate formed by adding damping materials into an interlayer of two metal materials, and can reduce the high-frequency noise of a motor in a vehicle.

The utility model provides a low noise electric motor car motor end cover, includes the end cover body, wherein the end cover body includes top layer 1, intermediate level 2 and bottom 3, and wherein top layer 1 and bottom 3 are metal material, and intermediate level 2 is damping material, and these three-layers are fixed together in proper order.

The metal materials of the top layer 1 and the bottom layer 3 are both DC06 steel.

The damping material of the middle layer 2 is polyurethane.

The thickness of the damping material of the middle layer 2 is 1.6 mm.

The invention has the beneficial effects that:

the motor end cover with the composite material structure is applied, so that the high-frequency radiation noise of the motor can be effectively reduced, the high-frequency noise in the vehicle is reduced, and the comfort of the noise in the vehicle is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an overall external structural view of the present invention.

Fig. 3 is a comparison of near field noise of the motor after the invention is applied.

FIG. 4 is a comparison of near field order noise for a motor using the present invention.

Wherein: 1 a top layer; 2 an intermediate layer; 3 bottom layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and 2, the low-noise electric vehicle motor end cover comprises an end cover body, wherein the end cover body comprises a top layer 1, a middle layer 2 and a bottom layer 3, the top layer 1 and the bottom layer 3 are made of metal materials, the middle layer 2 is made of damping materials, and the three layers are fixed together in sequence. Specifically, the three layers are formed by compounding together at high temperature and high pressure.

The damping material of the middle layer 2 is polyurethane. Or other high polymer resins such as phenolic resin-neoprene blends.

The thickness of the damping material of the middle layer 2 is 1.6 mm.

The end cover is practically applied to a certain electric vehicle model, and on the basis of a common steel material DC06, in order to reduce the noise of a motor, a high polymer resin is added into a middle interlayer to form a composite material structure with the thickness of 1.6 mm.

As can be seen from FIG. 3, after the end cap with the structure of the invention is used, the overall noise is obviously reduced and can reach 6dB (A) at most. As can be seen from fig. 4, the motor order noise and the switching frequency noise are improved significantly, and the comparison before and after the subjective evaluation can be improved by 1 point.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the scope of the present invention is not limited to the specific details of the above embodiments, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention, and these simple modifications belong to the scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. The utility model provides a low noise electric motor car motor end cover, includes the end cover body, its characterized in that wherein the end cover body includes top layer (1), intermediate level (2) and bottom (3), and wherein top layer (1) and bottom (3) are metal material, and intermediate level (2) are damping material, and these three-layers are fixed together in proper order.

2. The motor end cover of the low-noise electric vehicle as claimed in claim 1, wherein the metal materials of the top layer (1) and the bottom layer (3) are both made of DC06 steel.

3. A low noise electric vehicle motor end cover according to claim 2, characterized in that the damping material of the intermediate layer (2) is polyurethane.

4. A low noise electric vehicle motor end cover according to claim 3, characterized in that the damping material thickness of the intermediate layer (2) is 1.6 mm.