Inverter housing

Abstract

Provided is an inverter housing that can inhibit intrusion of foreign matter into the inside of the housing. The inverter housing (1) includes a lower housing (3) that surrounds the bottom surface and the lower portion of the side surface of an inverter (2), and an upper cover (4) that covers the upper surface of the inverter (2), and an annular sealing material (10) for preventing intrusion of dust from the outside is bonded to a sealing surface (6) at which the lower housing (3) and the upper cover (4) are joined, wherein a flange portion (5) to which the sealing material (10) is bonded is formed on the lower housing (3) so as to project outward, and an inner wall portion (11) having a higher thickness than the sealing material (10) is formed on the inner side of the sealing material (10) on the flange portion (5) so as to extend over the entire inner periphery of the sealing material. As a result, in the work of removing the sealing material, intrusion of the sealing material (10) into the inside of the lower housing (3) can be prevented or inhibited by the inner wall portion (11), and component failure caused by mixing of foreign matter can be avoided.

Description

Technical Field

[0001] This utility model relates to an inverter housing for housing inverters, electronic components, etc. Background Technology

[0002] As is well known, electric vehicles that use an electric motor as the driving force source for propulsion include an inverter as a power conversion unit between DC and AC. Patent Document 1 describes an inverter cover for suppressing electromagnetic noise generated by the inverter from being emitted to the outside. Specifically, by sandwiching a sealing material such as sealing rubber and gaskets between the mating surface of the container body (shell) housing the inverter and the inverter cover, which is shaped like a cover covering the upper surface of the container body, liquid tightness can be ensured.

[0003] Patent Document 1: Japanese Patent No. 4235681

[0004] However, when the inverter needs inspection or repair, the inverter cover must be removed each time internal components are replaced or repaired. Especially in the inverter cover described in Patent Document 1, since the mating surfaces of the housing and cover are bonded with sealing materials, the sealing material must be removed when the cover is installed or removed for internal component repair or replacement. During this removal process, a portion of the sealing material may be accidentally peeled off, and this removed foreign matter may inadvertently enter the housing, causing component malfunction. Utility Model Content

[0005] This utility model was developed in response to the aforementioned technical issues, and its purpose is to provide an inverter housing that can prevent foreign objects from entering the housing.

[0006] To achieve the above objectives, this utility model provides an inverter housing comprising a lower housing surrounding the bottom and sides of the inverter, and an upper cover covering the upper surface of the inverter. An annular sealing material for preventing dust from entering from the outside is bonded to the sealing surface where the lower housing and the upper cover meet. The invention is characterized in that a flange portion for bonding the sealing material is formed in the lower housing in a state of protruding outward, and an inner wall portion with a thickness greater than that of the sealing material is formed on the flange portion at a position closer to the inside of the sealing material, extending throughout the inner circumference of the sealing material.

[0007] In this invention, the inverter housing has an inner wall portion on the flange portion that extends along the entire inner circumference of the sealing material, forming a portion thicker than the sealing material itself. By providing this inner wall portion, when removing the upper cover to remove the sealing material, the inner wall portion can prevent or inhibit the intrusion of the sealing material or its fragments into the lower housing, thus avoiding component failures caused by foreign matter contamination. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view used to illustrate the structure of the inverter housing in an embodiment of the present invention.

[0009] Explanation of reference numerals in the attached figures

[0010] 1…Inverter housing; 2…Inverter; 3…Lower housing; 4…Upper cover; 5…Lower flange (flange); 6…Lower sealing surface (sealing surface); 7…Side side; 8…Upper flange; 9…Upper sealing surface; 10…Sealing material; 11…Inner wall. Detailed Implementation

[0011] like Figure 1 As shown, the inverter housing 1 of this embodiment is a housing for housing an inverter 2 in an electric vehicle that is mainly used as a driving force source or auxiliary driving force source for driving. The inverter 2 is used to convert DC power from the battery into AC power. Specifically, it consists of a lower housing 3 surrounding the bottom and sides of the inverter 2, and an upper cover 4 covering the upper surface of the inverter 2.

[0012] The lower housing 3 has a so-called box-shaped design, and a lower sealing surface 6 (hereinafter, sometimes simply referred to as sealing surface 6) is provided on the upper surface of the lower flange portion 5 (hereinafter, sometimes simply referred to as flange portion 5). The lower flange portion 5 extends horizontally to a predetermined length at the side end of the lower housing 3 (formed in a state of protruding outwards). In addition, a predetermined gap is provided between the side portion 7 of the lower housing 3 and the side of the inverter 2.

[0013] The upper cover 4 is a so-called cover shape, and has an upper flange 8 and an upper sealing surface 9 at its outer peripheral end. The upper flange 8 and the upper sealing surface 9 correspond to the flange 5 and sealing surface 6 of the lower housing 3 and extend horizontally to a predetermined length. Furthermore, an annular sealing material 10 for preventing dust, mud, and other dust from entering from the outside is adhered to the part where the lower sealing surface 6 and the upper sealing surface 9 meet.

[0014] In the above configuration, when the upper cover 4 is installed or removed during the repair or replacement of the inverter 2, during the process of peeling off the sealing material 10, a portion of the peeled sealing material 10, or a fragment that breaks off and flies away, may accidentally enter the interior of the inverter housing 1, potentially causing component failure. To address this issue, in this invention, an inner wall portion 11 is formed in the lower housing 3 to separate the sealing material 10 from the inverter 2.

[0015] In an embodiment of this invention, the inner wall portion 11 extends upward from the bottom surface of the lower housing 3. More specifically, an inner wall portion 11, thicker than the sealing material 10, is formed on the flange portion 5 at a position closer to the inside of the sealing material 10, covering the entire inner circumference of the sealing material 10. By providing this inner wall portion 11, during the removal of the sealing material 10, the inner wall portion 11 can prevent or suppress the intrusion of the sealing material 10 or its fragments into the interior of the lower housing 3, thus avoiding component failure caused by foreign matter contamination.

[0016] Furthermore, the above embodiments are merely one example of how this utility model is implemented and do not limit the utility model. For example, in the above embodiments, the inner wall portion 11 is formed to extend upward from the bottom part or side part 7 of the lower housing 3, but it is not limited thereto. For example, it can be formed to extend vertically on the sealing surface 6 of the flange portion 5 at a position closer to the inside of the sealing material 10, or it can be an L-shaped inner wall portion that extends horizontally from a predetermined height in the side part 7 of the lower housing 3 to a predetermined length and then extends upward. In short, if the inner wall portion 11 is closer to the inside of the sealing material 10 on the flange portion 5 and is thicker than the sealing material 10, and is formed to cover the entire inner circumference of the sealing material 10, then the inner wall portion 11 can prevent or suppress the intrusion of the sealing material 10 into the interior of the lower housing 3, and can avoid component failure caused by foreign matter mixing in.

Claims

1. An inverter housing comprising a lower housing surrounding the bottom and sides of an inverter, and an upper cover covering the upper surface of the inverter, wherein an annular sealing material for preventing dust from entering is bonded to the sealing surface where the lower housing and the upper cover abut, characterized in that, The flange portion for bonding the sealing material is formed in the lower housing in a state of protruding outwards, and an inner wall portion that is thicker than the sealing material is formed on the flange portion at a position closer to the inside of the sealing material, extending throughout the inner circumference of the sealing material.

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