Cover assembly for electric driving device, electric driving device and vehicle

Abstract

The present disclosure relates to a cover assembly for an electric drive, an electric drive and a vehicle, the cover assembly being arranged on a housing of the electric drive, the cover assembly comprising: a first layer structure arranged on the housing for closing the electric drive; the second layer structure is arranged on the first layer structure and used for blocking noise generated by the electric driving device from spreading outwards; and a third layer structure disposed on the second layer structure for absorbing noise generated from the electric drive device. The present disclosure also relates to an electric drive comprising such a cover assembly and a vehicle comprising such an electric drive.

Description

Technical Field

[0001] The present disclosure relates to a cover assembly for an electric drive device, a corresponding electric drive device, and a vehicle including the electric drive device. More particularly, the present disclosure relates to a cover assembly with improved noise reduction performance and a corresponding electric drive device. Background Art

[0002] The electric drive device generates noise during operation, which can reduce the user experience or bring other negative effects. In the prior art, the noise reduction performance of the cover assembly of the electric drive device still has some deficiencies, resulting in the user being able to experience a loud noise.

[0003] Therefore, it is desired to provide a cover assembly and a corresponding electric drive device to improve the above-mentioned defects in the prior art. Utility Model Content

[0004] According to a first aspect of the present disclosure, a cover assembly is proposed, which is arranged on the housing of an electric drive device. The cover assembly includes: a first layer structure, arranged on the housing, for enclosing the electric drive device; a second layer structure, arranged on the first layer structure, for blocking the noise generated by the electric drive device from propagating outward; and a third layer structure, arranged on the second layer structure, for absorbing the noise generated by the electric drive device.

[0005] According to this embodiment, the outward propagation of noise is first blocked by the second layer structure, and then the residual noise that is not completely blocked is absorbed by the third layer structure, thereby greatly improving the noise reduction performance of the cover assembly.

[0006] According to one embodiment of the present disclosure, the second layer structure may include a first supporting layer, a second supporting layer and a damping layer, the damping layer is located between the first supporting layer and the second supporting layer, and the first supporting layer and the second supporting layer are made of metal materials.

[0007] According to this embodiment, the first supporting layer and the second supporting layer provide structural support for the second layer structure, and the damping layer is used to block noise from propagating outward.

[0008] According to one embodiment of the present disclosure, the damping layer may include a rubber layer and a viscoelastic damping layer, the rubber layer is made of a rubber material, and the viscoelastic damping layer is made of a viscoelastic damping material.

[0009] According to one embodiment of the present disclosure, the thickness of the damping layer may be no less than 1 mm.

[0010] According to this embodiment, by providing a sufficiently thick damping layer, the ability of the second layer structure to block noise from propagating outward can be ensured, thereby improving the noise reduction performance of the cover assembly.

[0011] According to one embodiment of the present disclosure, the third layer structure may include an inner layer and an outer layer, the inner layer is closer to the second layer structure than the outer layer, the inner layer is made of a first foam material, and the outer layer is made of a second foam material.

[0012] According to one embodiment of the present disclosure, the first foam material may include PU foam, and the second foam material may include EVA foam.

[0013] According to one embodiment of the present disclosure, the thickness of the inner layer may be no less than 2 mm and / or the thickness of the outer layer may be no less than 1.5 mm.

[0014] According to this embodiment, by providing a sufficiently thick inner layer or outer layer, the noise absorbing capability of the third layer structure can be ensured, thereby improving the noise reduction performance of the cover assembly.

[0015] According to one embodiment of the present disclosure, the third layer structure may further include an assembly portion bent from an edge of the third layer structure toward the shell, with an assembly hole formed on the assembly portion, and the third layer structure is assembled to the shell via the assembly hole.

[0016] According to one embodiment of the present disclosure, the first layer structure may be made of stamped aluminum.

[0017] According to one embodiment of the present disclosure, the first layer structure may include a plate-shaped body, and a rib protruding toward the second layer structure is provided on a surface of the plate-shaped body.

[0018] According to this embodiment, the ribs are provided to enhance the strength of the first layer structure, thereby enhancing the strength of the entire cover assembly.

[0019] According to one embodiment of the present disclosure, the second layer structure can be bonded to the first layer structure by an adhesive, the first layer structure and the second layer structure are provided with corresponding mounting holes, and the first layer structure and the second layer structure are assembled to the housing via the mounting holes.

[0020] According to a second aspect of the present disclosure, an electric drive device is provided, comprising the cover assembly according to the first aspect of the present disclosure.

[0021] According to one embodiment of the present disclosure, the electric drive device may be an inverter.

[0022] According to a third aspect of the present disclosure, a vehicle is provided, comprising the electric drive device according to the second aspect of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. A person skilled in the art can derive other drawings based on these drawings without inventive effort. The following drawings are not intentionally scaled to actual size; their focus is on illustrating the main points of the present disclosure.

[0024] Figure 1 A schematic diagram of an inverter according to an embodiment of the present disclosure is shown. Figure 2

[0025] Figure 2 A schematic diagram of a cover assembly according to an embodiment of the present disclosure is shown. Figure 2

[0026] Figure 3 Schematic diagram showing the first layer structure according to an embodiment of the present disclosure Figure 2

[0027] Figure 4A Schematic diagram showing the second layer structure according to an embodiment of the present disclosure Figure 2

[0028] Figure 4B The schematic diagram of the second layer structure according to the embodiment of the present disclosure is shown. Figure 2

[0029] Figure 5A A schematic diagram showing the third layer structure according to an embodiment of the present disclosure Figure 2

[0030] Figure 5B A schematic diagram of the composition structure of the third layer structure according to an embodiment of the present disclosure is shown.

[0031] Throughout the drawings, the same or similar components are indicated by the same reference numerals.

[0032] Reference numerals

[0033] 10 Electric drive unit

[0034] 12 shell

[0035] 100 cover assembly

[0036] 110 First floor structure

[0037] 112 plate body

[0038] 114 convex ribs

[0039] 116 first mounting hole

[0040] 120 Second floor structure

[0041] 122 first support layer

[0042] 124 second support layer

[0043] 126 damping layer

[0044] 128 second mounting hole

[0045] 130 Third floor structure

[0046] 132 inner layer

[0047] 134 outer layer

[0048] 135 Assembly Department

[0049] 136 assembly holes DETAILED DESCRIPTION

[0050] In order to make the purpose, scheme and advantages of the technical solution of the present disclosure more clear, the technical solution of the embodiment of the present disclosure will be clearly and completely described below in conjunction with the drawings of the specific embodiment of the present disclosure. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0051] Figure 1 A schematic diagram of an electric drive device 10 according to an embodiment of the present disclosure is shown. For example, in this embodiment, the electric drive device 10 is an inverter. The electric drive device 10 includes a housing 12 and a cover assembly 100. The cover assembly 100 is arranged on the housing 12 of the electric drive device 10 to form an enclosed space, preventing foreign matter such as dust or water from entering the interior of the electric drive device 10 and affecting its performance. The electric drive device 10 generates considerable noise during operation, and the cover assembly 100 is required to reduce this noise, thereby improving the user experience. In response to the above technical issues, the present disclosure proposes a cover assembly 100 that can significantly reduce the noise generated by the electric drive device 10. The specific technical features of the cover assembly 100 will be described in detail below. It should be understood that while the present disclosure describes the noise reduction performance of the cover assembly 100 using an inverter as an example, the present disclosure is not intended to limit the noise reduction performance to electric drive devices. The cover assembly 100 of the present disclosure can also achieve noise reduction for any other suitable electric drive device.

[0052] Figure 2 A schematic diagram of a cap assembly 100 according to an embodiment of the present disclosure is shown.

[0053] like Figure 2As shown, the cover assembly 100 includes a first layer structure 110, a second layer structure 120, and a third layer structure 130. The first layer structure 110 is arranged on the housing 12 of the electric drive device 10, enclosing the electric drive device 10 and protecting it from external foreign matter. The second layer structure 120 is arranged on the first layer structure 110 to block the outward propagation of noise generated by the electric drive device 10. The third layer structure 130 is arranged on the second layer structure 120 to absorb the noise generated by the electric drive device 10. It should be understood that the description "A is arranged on B" herein is not intended to limit the vertical positional relationship between A and B, but only means that A and B are arranged adjacent to each other. In the cover assembly 100 of the present disclosure, the outward propagation of noise is first blocked by the second layer structure 120, and then the residual noise that is not completely blocked is absorbed by the third layer structure 130, significantly improving the noise reduction performance of the cover assembly 100.

[0054] Figure 3 Schematic diagram of a first layer structure 110 according to an embodiment of the present disclosure is shown.

[0055] like Figure 3 As shown, the first layer structure 110 may include a plate-shaped body 112, with ribs 114 disposed on a surface of the plate-shaped body 112 protruding toward the second layer structure 120. The provision of ribs 114 enhances the strength of the first layer structure 110, thereby enhancing the strength of the entire cover assembly 100. The first layer structure 110 is provided with a first mounting hole 116, through which the first layer structure 110 can be assembled to the housing 12 of the electric drive device 10.

[0056] For example, in one embodiment of the present disclosure, the first layer structure 110 may be made of stamped aluminum.

[0057] Figure 4A Schematic diagram of a second layer structure 120 according to an embodiment of the present disclosure is shown. Figure 4B FIG. 1 shows a schematic diagram of the composition structure of the second layer structure 120 according to an embodiment of the present disclosure.

[0058] like Figure 4A As shown, the second layer structure 120 is provided with a second mounting hole 128 , and the second layer structure 120 is assembled to the housing 12 of the electric drive device 10 via the second mounting hole 128 .

[0059] like Figure 4BAs shown, the second layer structure 120 may include a first supporting layer 122, a second supporting layer 124, and a damping layer 126. The damping layer 126 is located between the first and second supporting layers 122, 124, and the first and second supporting layers 122, 124 are made of a metal material. Thus, the first and second supporting layers 122, 124 provide structural support for the second layer structure 120, and the damping layer 126 is used to block outward noise propagation. Furthermore, the damping layer 126 may include a rubber layer and a viscoelastic damping layer. The rubber layer is made of a rubber material, and the viscoelastic damping layer is made of a viscoelastic damping material. Rubber and viscoelastic damping materials help reflect noise, thereby blocking outward noise propagation. Therefore, the damping layer 126 formed of rubber and viscoelastic damping materials is particularly suitable for blocking outward noise propagation. More preferably, the thickness of the damping layer 126 may be no less than 1 mm. For example, the thickness of the damping layer 126 may be 1.66 mm. By providing a sufficiently thick damping layer 126 , the ability of the second layer structure 120 to block noise from propagating outward can be ensured, thereby improving the noise reduction performance of the cover assembly 100 .

[0060] Figure 5A A schematic diagram of a third layer structure 130 according to an embodiment of the present disclosure is shown. Figure 5B FIG. 1 shows a schematic diagram of the composition structure of the third layer structure 130 according to an embodiment of the present disclosure.

[0061] like Figure 5A As shown, the third layer structure 130 may include an assembly portion 135 , which is bent from an edge of the third layer structure 130 toward the housing 12 . An assembly hole 136 is formed on the assembly portion 135 , and the third layer structure is assembled to the housing 12 via the assembly hole 136 .

[0062] like Figure 5B As shown, the third layer structure 130 may include an inner layer 132 and an outer layer 134. The inner layer 132 is closer to the second layer structure 120 than the outer layer 134. The inner layer 132 is made of a first foam material, and the outer layer 134 is made of a second foam material. The first foam material may include PU foam, and the second foam material may include EVA foam. The porous foam material helps to absorb noise, so the third layer structure 130 formed by the foam material is particularly helpful in absorbing noise. Furthermore, the thickness of the inner layer 132 may be not less than 2 mm and / or the thickness of the outer layer 134 may be not less than 1.5 mm. By providing a sufficiently thick inner layer 132 or outer layer 134, the noise absorption ability of the third layer structure 130 can be ensured, thereby improving the noise reduction performance of the cover assembly 100.

[0063] The cover assembly of the electric drive device provided by the embodiment of the present disclosure can be assembled according to the following steps: the second layer structure 120 is first bonded to the first layer structure 110 by an adhesive, and the first layer structure 110 and the second layer structure 120 are then respectively assembled to the housing 12 of the electric drive device 10 via the first mounting hole 116 and the second mounting hole 128. Then, the third layer structure 130 is bonded to the second layer structure 120 by an adhesive, and the third layer structure is then assembled to the housing 12 via the assembly hole 136. The cover assembly provided by the embodiment of the present disclosure has a simple structure and is easy to assemble, and can be easily and quickly implemented.

[0064] The electric drive device 10 according to the present disclosure is particularly suitable for use in vehicles because users do not want to be disturbed by noise when in the vehicle. The electric drive device 10 according to the present disclosure has good noise reduction performance by providing the cover assembly 100, thereby improving the experience of people in the vehicle.

[0065] The vehicle may be an electrified vehicle, such as a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a range-extended electric vehicle (EV), or a fuel cell electric vehicle (FCEV). The vehicle may also be a hydrogen-powered vehicle.

[0066] This document describes in detail several exemplary embodiments of the present disclosure with reference to preferred embodiments. However, it will be understood by those skilled in the art that various modifications and variations may be made to the above-mentioned specific embodiments without departing from the concept of the present disclosure, and that the various technical features and structures proposed in the present disclosure may be combined without exceeding the scope of protection of the present disclosure, which is determined by the appended claims.

Claims

1. A cover assembly (100) for an electric drive device, characterized in that: The cover assembly (100) is arranged on a housing (12) of the electric drive device, and the cover assembly (100) comprises: a first layer structure (110), arranged on the housing (12) and used to enclose the electric drive device; a second layer structure (120), arranged on the first layer structure (110), for blocking the noise generated by the electric drive device from propagating outward; a third layer structure (130), arranged on the second layer structure (120), for absorbing noise generated from the electric drive device, The second layer structure (120) comprises a first supporting layer (122), a second supporting layer (124) and a damping layer (126), wherein the damping layer (126) is located between the first supporting layer (122) and the second supporting layer (124), and the first supporting layer (122) and the second supporting layer (124) are made of metal materials.

2. The cover assembly (100) according to claim 1, characterized in that The damping layer (126) comprises a rubber layer and a viscoelastic damping layer, the rubber layer is made of a rubber material, and the viscoelastic damping layer is made of a viscoelastic damping material.

3. The cover assembly (100) according to claim 2, characterized in that The thickness of the damping layer (126) is not less than 1 mm.

4. The cover assembly (100) according to claim 1, characterized in that The third layer structure (130) includes an inner layer (132) and an outer layer (134), wherein the inner layer (132) is closer to the second layer structure (120) than the outer layer (134), the inner layer (132) is made of a first foam material, and the outer layer (134) is made of a second foam material.

5. The cover assembly (100) according to claim 4, characterized in that The first foam material includes PU foam, and the second foam material includes EVA foam.

6. The cover assembly (100) according to claim 4, characterized in that The thickness of the inner layer (132) is not less than 2 mm and / or the thickness of the outer layer (134) is not less than 1.5 mm.

7. The cover assembly (100) according to claim 4, characterized in that The third layer structure (130) further includes an assembly portion (135), wherein the assembly portion (135) is bent from the edge of the third layer structure (130) toward the shell (12), and an assembly hole (136) is formed on the assembly portion (135), and the third layer structure (130) is assembled to the shell (12) via the assembly hole (136).

8. The cover assembly (100) according to claim 1, characterized in that The first layer structure (110) is made of stamped aluminum.

9. The cover assembly according to claim 8, wherein: The first layer structure (110) comprises a plate-shaped main body (112), and a convex rib (114) protruding toward the second layer structure (120) is provided on the surface of the plate-shaped main body (112).

10. The cover assembly (100) according to claim 1, characterized in that The second layer structure (120) is bonded to the first layer structure (110) by an adhesive, the first layer structure (110) and the second layer structure (120) are provided with corresponding mounting holes (116, 128), and the first layer structure (110) and the second layer structure (120) are assembled to the shell (12) via the mounting holes (116, 128).

11. An electric drive device (10), characterized in that: The electric drive device (10) comprises a cover assembly (100) according to any one of claims 1 to 10.

12. The electric drive device (10) according to claim 11, characterized in that The electric drive device (10) is an inverter.

13. A vehicle, characterized in that: The vehicle comprises an electric drive device (10) according to claim 11 or 12.

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