CN213846580U

CN213846580U - PEU cover plate

Info

Publication number: CN213846580U
Application number: CN202022917773.XU
Authority: CN
Inventors: 赵江浩; 张策; 任传委
Original assignee: Weiran Nanjing Power Technology Co ltd
Current assignee: Weiran Nanjing Power Technology Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-07-30
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses a PEU cover plate, which comprises a vibration transmission area and a vibration buffer area, wherein the vibration transmission area is positioned at the outer edge of the cover plate; the vibration buffer zone is of a honeycomb structure and comprises a first buffer zone and a second buffer zone, the first buffer zone is positioned on the inner side of the vibration transmission zone, the outer side of the second buffer zone is positioned on the inner side of the first buffer zone until the center of the cover plate. The utility model discloses the mode is high, and NVH performance is good, practices thrift the cost, is convenient for batch production and extensive application.

Description

PEU cover plate

Technical Field

The utility model relates to an apron, especially a PEU apron.

Background

At present, most motor driving systems integrate functions of an MCU (motor control unit), a DC-DC (direct current-direct current), an OBC (on-board battery charger), a PTC (on-board heater) and the like, and the power integration unit is called a PEU (power electronic unit). The mode of the PEU cover plate is always a technical problem, most of the existing cover plates on the market at present are formed by punching, and are easy to break during manufacturing, and the cost of a die is high. Moreover, the structure of the current cover plate is mainly a simple geometric framework, and has low overall rigidity, low mode, dense order density and poor NVH (noise, vibration and harshness) performance. Therefore, the development of a high-mode cover plate is a necessary trend of electric driving development of the electric automobile.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a PEU apron of high mode, NVH excellent performance and the batch production of being convenient for.

The technical scheme is as follows: the PEU cover plate of the utility model comprises a vibration transmission area and a vibration buffer area, wherein the vibration transmission area is positioned at the outer edge of the cover plate; the vibration buffer zone comprises a first buffer zone and a second buffer zone, the first buffer zone is positioned on the inner side of the vibration transmission zone, the outer side of the second buffer zone is positioned on the inner side of the first buffer zone until the center of the cover plate. The vibration buffer area is of a honeycomb structure, is designed in a bionic mode, and utilizes the hexagonal vibration absorption principle to relieve the vibration of the cover plate.

The first buffer area is formed by a plurality of triangular cells in a staggered and adjacent mode, amplitude is quickly transmitted by absorption, and meanwhile the rigidity of the outer side of the cover plate is improved by the aid of the stability of the triangular cells.

The second buffer area is formed by a plurality of hexagonal cells in a staggered and adjacent mode, so that vibration is transmitted uniformly and vibration energy is absorbed.

The thickness of the vibration transmission area is consistent with that of the vibration buffer area, so that the structural rigidity is improved, and the first-order mode and NVH performance of the cover plate are improved.

The edge of the vibration transmission area is provided with a screw hole, and the fastening cover plate can be installed through bolts or rivets.

The upper cover plate is formed by die casting, so that the operation is simple and the die cost is saved.

Has the advantages that: compared with the prior art, the utility model has the advantages of as follows:

1. the thickening of the vibration transfer area and the triangular cells of the first buffer area jointly improve the rigidity of the edge, so that the absolute displacement of the vibration position amplitude in vibration is controlled, and the NVH performance is improved;

2. the second buffer area reduces the vibration energy from the vibration transmission path by using the hexagonal vibration absorption principle, so that the NVH performance is improved;

3. simple structure, the convenient batch production of die-casting construction practices thrift the cost, and maneuverability is strong, is applicable to multiple product of the same type.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic illustration of the structure and NVH of a comparative example;

FIG. 3 is a schematic diagram of the structure and NVH of example 1;

FIG. 4 is a schematic diagram of the structure and NVH of example 2;

FIG. 5 is a schematic diagram of the structure and NVH of example 3.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the PEU cover plate includes a vibration transmission region 1 and a vibration buffering region. The vibration transmission area 1 is located on the outer side edge of the cover plate, and screw holes are formed in the edge of the vibration transmission area 1 and used for mounting and fastening the cover plate. The vibration buffer zone is of a honeycomb structure and comprises a first buffer zone 2 and a second buffer zone 3, the first buffer zone 2 is positioned on the inner side of the vibration transmission zone 1, and the outer side of the second buffer zone 3 is formed by a plurality of triangular cells in a staggered and adjacent mode, so that the rigidity of the outer side of the cover plate is increased; the second buffer area 3 is positioned at the inner side of the first buffer area 2 to the center of the cover plate and is formed by a plurality of hexagonal cells which are staggered and adjoined. The whole buffer area is of a honeycomb structure, and the vibration of the cover plate is relieved by utilizing the hexagonal vibration absorption principle.

As shown in fig. 2-5, schematic illustrations of the PEU cover plate structure and NVH of comparative example, example 1, example 2 and example 3.

Comparative example:

as shown in fig. 2, the buffer area of the PEU cover is made up of a simple geometric frame, the thickness of the cover edge, i.e. the vibration transmission area, is 3mm, and the thickness of the cover inner side, i.e. the vibration buffer area, is 8mm, resulting in a schematic NVH diagram, with the result of the first-order mode 377 Hz.

Example 1:

as shown in fig. 3, the buffer area of the PEU cover plate is formed by a hexagonal honeycomb structure, the buffer area is formed by hexagonal cells which are staggered and adjoined, the thickness of the edge of the cover plate, namely the vibration transmission area, is 5mm, and the thickness of the inner side of the cover plate, namely the vibration buffer area, is 8mm, so that the NVH schematic diagram is obtained, and the result is a first-order mode of 509 Hz.

Example 2:

as shown in fig. 4, the buffer area of the PEU cover plate is formed by a hexagonal honeycomb structure, the buffer area is formed by hexagonal cells which are staggered and adjoined, the thickness of the cover plate edge, namely the vibration transmission area, is 8mm, and the thickness of the cover plate inner side, namely the vibration buffer area, is 8mm, so that the NVH schematic diagram is obtained, and the result is a first-order mode 552 Hz.

Example 3:

as shown in fig. 5, the buffer area of the PEU cover plate is formed by a hexagonal honeycomb structure, the first buffer area is formed by staggered and adjacent triangular cells, the second buffer area is formed by staggered and adjacent hexagonal cells, the thickness of the edge of the cover plate, namely the vibration transmission area, is 8mm, and the thickness of the inner side of the cover plate, namely the vibration buffer area, is 8mm, so that the NVH schematic diagram is obtained, and the result is a first-order mode of 618 Hz.

Comparing the comparative example with example 1, it is concluded that the honeycomb structure can effectively improve the first-order mode of the PEU cover plate and reduce the order density; comparing example 1 with example 2, it is concluded that increasing the thickness of the vibration transmission region can further improve the first order mode of the PEU cover plate and reduce the order density; comparing example 2 with example 3, it is concluded that the triangular cells are added outside the buffer region, i.e., the first buffer region, to improve the rigidity of the PEU cover plate, thereby further improving the first-order mode of the PEU cover plate and reducing the order density. Example 3 is a modality-optimal choice.

To sum up, can derive the utility model discloses a honeycomb type structure, increase vibration transmission district thickness and add triangle-shaped bee check in first buffer area and can make the mode of PEU apron obtain obvious improvement.

Claims

1. A PEU cover plate, comprising a vibration transmission region (1) and a vibration damping region, said vibration transmission region being located at an outer edge of the cover plate; the vibration buffer zone is of a honeycomb structure and comprises a first buffer zone (2) and a second buffer zone (3), wherein the first buffer zone (2) is located on the inner side of the vibration transmission zone (1), the outer side of the second buffer zone (3) is located on the inner side of the first buffer zone (2) until the center of the cover plate.

2. The PEU cover plate of claim 1, wherein the first buffer zone (2) is formed by a plurality of triangular cells which are staggered and adjoined.

3. The PEU cover plate of claim 1, wherein the second buffer zone (3) is formed by a plurality of hexagonal cells which are staggered and adjoined.

4. The PEU cover plate of claim 1, wherein the thickness of the vibration transmission zone (1) corresponds to the thickness of the vibration damping zone.

5. The PEU cover plate according to claim 1, wherein the vibration transmission region (1) is provided with screw holes at its edges.

6. The PEU cover of claim 1, wherein said cover is die cast.