Anti-corrosion structure of electrical equipment shell and electric drive assembly

Abstract

The utility model discloses an anti-corrosion structure of an electrical equipment shell and an electric drive assembly, and relates to the technical field of anti-corrosion, the electrical equipment shell comprises a first shell and a second shell, the first shell and the second shell are made of different metal materials, and the first shell is made of magnesium alloy; the anti-corrosion structure comprises a first flow guide part and a second flow guide part, the first flow guide part is arranged at the bottom of the first shell in the using state, and the second flow guide part is arranged on the side face of the electrical equipment shell in the using state. According to the utility model, through the first flow guide piece and the second flow guide piece, the salt mist liquid can be prevented from being gathered at the joint surfaces of the first shell and the second shell, so that the corrosion condition is reduced. Therefore, the anti-corrosion performance of the electrical equipment shell can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-corrosion, and in particular to an anti-corrosion structure of an electrical equipment housing and an electric drive assembly. Background Art

[0002] The electric drive assembly refers to the collection of electrified components used to drive the wheels of an electric vehicle (EV) or hybrid electric vehicle (HEV). It typically consists of a motor, reducer, controller, and other components. The electric drive assembly housing is the outer shell that houses these components. It typically consists of an integrated housing and end caps. The end caps are made of magnesium alloy, while the integrated housing is made of aluminum alloy or other materials.

[0003] In actual use, when the electric drive assembly is in a salt spray environment, due to the different materials used for the end cover and the integrated machine housing, the salt spray liquefies and gathers at the bottom of the joint surface between the two, causing the bottom of the joint surface to be easily corroded, reducing the reliability of the product. Utility Model Content

[0004] The main purpose of the utility model is to propose an anti-corrosion structure for an electric drive assembly housing, aiming to solve the problem that the bottom of the joint surface between the existing magnesium alloy housing and other material housings is prone to corrosion.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an anti-corrosion structure for an electrical device housing, wherein the electrical device housing includes a first housing and a second housing, the first housing and the second housing being made of different metal materials, the first housing being made of a magnesium alloy, and the anti-corrosion structure comprising:

[0006] A first flow guide is provided at the bottom of the first shell when in use, and is used to prevent the salt spray liquid on the surface of the first shell from gathering at the joint surface of the first shell and the second shell;

[0007] The second flow guide is arranged on the side of the electrical equipment housing when it is in use, and is used to prevent salt mist on the side of the electrical equipment housing from gathering at the joint surface of the first housing and the second housing.

[0008] In one embodiment, the first flow guide is protruding downward and is extended along the bottom of the first shell, so that a step is formed between the bottom surfaces of the first shell and the second shell.

[0009] Alternatively, a plurality of reinforcing ribs are provided on the surface of the first shell, and the first flow guide is convexly provided on the bottom of the reinforcing ribs when the reinforcing ribs are in use, or the first flow guide is a concave structure opened at the bottom when the reinforcing ribs are in use.

[0010] In one embodiment, the second flow guide is provided on one side or both sides of the first shell and / or the second shell, and is used to guide the salt mist liquid on the side surface of the first shell and / or the side surface of the second shell.

[0011] In one embodiment, the at least one second flow guide is located on the first shell and / or the second shell close to the bottom surface in the use state; and / or,

[0012] The at least one second flow guide is located on the first shell and / or the second shell in the middle area in the up-down direction in the use state.

[0013] In one embodiment, the second flow guide is arranged at an angle.

[0014] In one embodiment, the second flow guide is a rib structure.

[0015] In one embodiment, a sunken threaded connection hole is provided on the first shell and / or the second shell, the first shell and the second shell are connected by bolts, and an insulating glue is provided on the periphery of the bolts.

[0016] In one embodiment, the bolt is made of a magnesium alloy material, or the surface of the bolt is coated with a magnesium alloy coating.

[0017] In one embodiment, the electrical equipment housing is an electric drive assembly housing, which includes an integrated housing and an end cover connected to the integrated housing; wherein the end cover is the first housing and the integrated housing is the second housing.

[0018] In a second aspect, the present invention provides an electric drive assembly, the housing of which includes any of the above-mentioned anti-corrosion structures of the electrical equipment housing.

[0019] The anti-corrosion structure of the present invention includes a first guide member and a second guide member, which can prevent salt spray liquid from accumulating at the bottom of the joint surface of the first shell and the second shell, thereby reducing corrosion. Therefore, the present invention can improve the corrosion resistance of the electrical equipment shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the external structure of the electric drive assembly in one embodiment of the present utility model;

[0022] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0023] Figure 3This is a structural diagram of the first shell in one embodiment of the present utility model;

[0024] Figure 4 It is a front view of the electric drive assembly in one embodiment of the present utility model.

[0025] Explanation of Figure Numbers

[0026] 100. Anti-corrosion structure of electric drive assembly housing; 11. First flow guide; 12. Second flow guide;

[0027] 200, first shell;

[0028] 300. Second shell. DETAILED DESCRIPTION

[0029] It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. "At least one" appearing in the embodiments of the present invention refers to one or more, and "more" refers to two or more.

[0030] In the description of the embodiments of the present invention, if the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the technical terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0033] The electric drive assembly housing generally consists of a reducer housing and an integrated machine housing. The reducer housing is made of magnesium alloy, while the integrated machine housing is made of other materials such as aluminum alloy. The reducer housing and the integrated machine housing are fastened together with bolts. In actual use, when the electric drive assembly is in a salt spray environment, the reducer housing and the integrated machine housing are made of different materials, which makes the joint surface between the two susceptible to corrosion, especially the bottom of the joint surface between the reducer housing and the integrated machine housing. This is because the liquid generated by the liquefaction of the deceleration salt spray will accumulate at the bottom of the joint surface, causing severe corrosion at the bottom of the joint surface.

[0034] To this end, a method can be adopted to prevent the accumulation of salt mist liquid at the bottom of the joint surface to reduce the corrosion of the bottom. Based on the above considerations, the utility model proposes to set a guide piece, so that the salt mist liquid can fall directly without accumulating at the bottom of the joint surface, thereby reducing the corrosion.

[0035] According to some embodiments of the present invention, Figure 1 As shown, the present invention proposes an anti-corrosion structure 100 for an electrical equipment housing, wherein the electrical equipment housing includes a first housing 200 and a second housing 300. The first housing 200 and the second housing 300 are made of different metal materials, and the material of the first housing 200 is magnesium alloy; the anti-corrosion structure 100 includes a first flow guide 11 and a second flow guide 12. The first flow guide 11 is arranged at the bottom of the first housing 200 when it is in use, and is used to prevent the salt mist liquid on the surface of the first housing 200 from gathering at the joint surface of the first housing 200 and the second housing 300; the second flow guide 12 is arranged on the side of the electrical equipment housing when it is in use, and is used to prevent the salt mist on the side of the electrical equipment housing from gathering at the joint surface of the first housing 200 and the second housing 300.

[0036] Taking the electric drive assembly housing as an example, Figure 1 This is a schematic diagram of the electric drive assembly in use. The liquefied salt mist flows downward along the front surface of the first housing 200 in use, i.e., the right side surface of the first housing 200, and finally accumulates at the junction of the first and second housings 200 and 300. The first flow guide 11 guides the salt mist flowing down the front surface of the first housing 200, preventing it from flowing to the junction of the first and second housings 200 and 300.

[0037] The side surfaces of the electrical device housing when in use are also the sides of the first and second housings 200, 300. The liquefied salt mist flows downward along the side surfaces, ultimately accumulating at the junction of the bottom surfaces of the first and second housings 200, 300. The second flow guide 12 can direct the salt mist liquid flowing down the side surfaces, causing it to fall directly, thereby preventing it from flowing to the junction of the bottom surfaces of the first and second housings 200, 300.

[0038] The present invention can prevent the salt mist liquid from flowing to the joint surface between the first housing 200 and the second housing 300 through the first guide member 11 and the second guide member 12, thereby reducing corrosion. Therefore, the present invention can improve the corrosion resistance of the electrical equipment housing.

[0039] According to some embodiments of the present invention, Figure 2-4 As shown, the first flow guide 11 is protruding downward and is extended along the bottom of the first shell 200 so that a step is formed between the bottom surfaces of the first shell 200 and the second shell 300 .

[0040] by Figure 3 For example, the first flow guide 11 extends downward. When part of the salt mist liquid flows downward along the front surface of the first shell 200 to the bottom surface of the first shell 200, the first flow guide 11 blocks and intercepts the salt mist liquid, and the salt mist liquid falls downward along the first flow guide 11, thereby avoiding flowing to the junction of the bottom surfaces of the first shell 200 and the second shell 300.

[0041] The first guide member 11 is extended along the bottom of the first housing 200. Figure 3 The first guide member 11 is extended in the horizontal direction, that is, it is located on the entire bottom surface of the first shell 200, which can fully intercept the salt mist liquid flowing down the front surface of the first shell 200, thereby improving the blocking effect on the salt mist liquid.

[0042] It should be noted that Figure 2 and 3 It can be seen that when the bottom surface of the first shell 200 is a non-planar structure with a curvature, correspondingly, the side of the first flow guide 11 that is in contact with the first shell 200 is also set to a non-planar structure with a curvature, that is, the first flow guide 11 and the bottom surface of the first shell 200 must be set in contact with each other to prevent the salt spray liquid from flowing from the gap between the first flow guide 11 and the first shell 200 to the junction of the bottom surfaces of the first shell 200 and the second shell 300.

[0043] In another embodiment, the surface of the first housing 200 is provided with a plurality of reinforcing ribs, and the first deflector 11 is protruding from the bottom of the reinforcing ribs when in use, or the first deflector 11 is formed as a concave structure at the bottom of the reinforcing ribs when in use. By adding the protruding first deflector 11 to the bottom of the reinforcing ribs, or by providing a concave structure at the bottom of the reinforcing ribs to form the first deflector 11, salt mist can be dropped onto the protruding first deflector 11 or the concave structure, and will not flow along the reinforcing ribs to the interface between the first housing 200 and the second housing 300.

[0044] According to some embodiments of the present invention, the second guide member 12 is disposed on one or both sides of the first shell 200 and / or the second shell 300 to drain the salt spray liquid on the side of the first shell 200 and / or the side of the second shell 300.

[0045] The second flow guide 12 is provided on the first shell 200 and / or the second shell 300, which means that the second flow guide can be provided on the first shell 200, the second shell 300, or both the first shell 200 and the second shell 300.

[0046] For example, refer to Figure 1 As shown, the second flow guide 12 is arranged across the first shell 200 and the second shell 300 , that is, the second flow guide 12 is located at the joint surface of the first shell 200 and the second shell 300 .

[0047] by Figure 4 For example, the second guide member 12 is disposed on one side or both sides of the first shell 200 and / or the second shell 300. Figure 4 In the horizontal direction, the second flow guide 12 can be provided on the left side of the first shell 200 and / or the second shell 300, or on the right side of the first shell 200 and / or the second shell 300, or on both the left and right sides of the first shell 200 and / or the second shell 300. In this way, the salt spray liquid on both sides of the shell can be effectively intercepted.

[0048] According to some embodiments of the present invention, the position of at least one second flow guide 12 on the first shell 200 and / or the second shell 300 is close to the bottom surface when in use; and / or, the position of at least one second flow guide 12 on the first shell 200 and / or the second shell 300 is located in the middle area in the upper and lower directions when in use.

[0049] The position of the at least one second flow guide 12 on the first housing 200 and / or the second housing 300 being close to the bottom surface when in use means that the at least one second flow guide 12 is arranged on a side surface of the first housing 200 and / or the second housing 300 and is arranged close to the bottom surface. The position of the at least one second flow guide 12 on the first housing 200 and / or the second housing 300 being located in the middle area in the vertical direction when in use means that the at least one second flow guide 12 is arranged on a side surface of the first housing 200 and / or the second housing 300 and is located in the middle area in the vertical direction.

[0050] by Figure 4 For example, a second deflector 12 is provided at the bottom of the left side surface of the electrical device housing. The first deflector 12 is located at the junction of the first housing 200 and the second housing 300. Another second deflector 12 is provided in the middle area of ​​the right side surface of the electrical device housing. This second deflector 12 is also located at the junction of the first housing 200 and the second housing 300. The two second deflectors 12 provided on both sides can improve the interception effect of salt spray liquid.

[0051] According to some embodiments of the present invention, Figure 4 As shown, the second guide member 12 is arranged tilted.

[0052] The second guide member 12 is tilted so that it forms an angle with the horizontal plane. This allows the salt mist liquid flowing into the second guide member 12 to flow outward along the second guide member 12 until it drips. If the second guide member 12 is positioned horizontally, the salt mist liquid is likely to accumulate. If the second guide member 12 is positioned vertically, the salt mist liquid may flow along the second guide member 12 onto the surface of the first housing 200.

[0053] According to some embodiments of the present invention, Figure 1 and 4 As shown, the second guide member 12 is a rib structure. The second guide member 12 is a rib structure means that the second guide member 12 is a rib arranged on the surface of the shell. Figure 1 and 3 For example, in order to ensure the interception effect of salt spray liquid, the ribs extend along the shell surface for a certain length.

[0054] According to some embodiments of the present invention, the first shell 200 and / or the second shell 300 are provided with sunken threaded connection holes, the first shell 200 and the second shell 300 are connected by bolts, and the outer periphery of the bolts is provided with insulating glue.

[0055] refer to Figure 1 As shown, a sunken threaded connection hole is provided on the first shell 200, and bolts connect the first shell 200 and the second shell 300 through the threaded connection hole. Insulating glue is provided on the periphery of the bolt to avoid galvanic corrosion.

[0056] According to some embodiments of the present invention, the bolts are made of a magnesium alloy, or coated with a magnesium alloy coating. When these bolts are used to connect a first housing 200 made of a magnesium alloy to a second housing 300 made of a different material, the overall potential difference can be significantly reduced, thereby alleviating galvanic corrosion.

[0057] According to some embodiments of the present invention, the housing of the electrical equipment is an electric drive assembly housing, which includes an integrated housing and an end cover connected to the integrated housing; wherein the end cover is the first housing 200 and the integrated housing is the second housing 300.

[0058] According to some embodiments of the present invention, the present invention further provides an electric drive assembly, wherein the housing of the electric drive assembly includes any of the above-mentioned anti-corrosion structures of the housing of the electrical equipment.

[0059] According to some embodiments of the present invention, Figure 1-4 As shown, the present invention provides an electric drive assembly, including an anti-corrosion structure 100, a first shell 200 (end cover) and a second shell 300 (integrated machine shell). The anti-corrosion structure 100 includes a first flow guide 11 and a second flow guide 12. The first flow guide 11 is a boss structure arranged on the bottom surface of the first shell 200 when in use. The first flow guide 11 extends along the bottom surface of the first shell 200 when in use, and is used to prevent the salt spray liquid flowing down the front side of the electric drive assembly from flowing to the junction of the bottom surfaces of the first shell 200 and the second shell 300 when the electric drive assembly is in use. There are two second flow guides 12, one of which is arranged on the front surface of the electric drive assembly shell, and the other second flow guide 12 is arranged on the rear surface of the electric drive assembly shell, and both second flow guides 12 are arranged at the junction of the first shell 200 and the second shell 300. The second deflector 12 on the front surface is positioned near the bottom surface of the electric drive assembly when in use. The second deflector 12 on the rear surface is positioned in the middle region of the vertical direction when the electric drive assembly is in use. The second deflector 12 is an inclined rib structure that prevents salt spray liquid flowing down the side of the electric drive assembly when in use from flowing to the junction of the bottom surfaces of the first and second housings 200 and 300.

[0060] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An anti-corrosion structure for an electrical equipment housing, the electrical equipment housing comprising a first housing and a second housing, characterized in that: The first shell and the second shell are made of different metal materials. The first shell is made of magnesium alloy. The anti-corrosion structure includes: a first flow guide, disposed at the bottom of the first shell when in use, for preventing the salt mist liquid on the surface of the first shell from gathering at the joint surface of the first shell and the second shell; The second flow guide is arranged on the side of the electrical equipment housing when the housing is in use, and is used to prevent salt mist on the side of the electrical equipment housing from gathering at the joint surface of the first housing and the second housing.

2. The anti-corrosion structure of the electrical equipment housing according to claim 1, characterized in that: The first flow guide is protruding downward and extending along the bottom of the first shell, so that a step is formed between the bottom surfaces of the first shell and the second shell; Alternatively, a plurality of reinforcing ribs are provided on the surface of the first shell, and the first flow guide is convexly provided on the bottom of the reinforcing ribs when the reinforcing ribs are in use, or the first flow guide is a concave structure opened at the bottom when the reinforcing ribs are in use.

3. The anti-corrosion structure of the electrical equipment housing according to claim 1, characterized in that: The second flow guide is arranged on one side or both sides of the first shell and / or the second shell, and is used to drain the salt spray liquid on the side surface of the first shell and / or the side surface of the second shell.

4. The anti-corrosion structure of the electrical equipment housing according to claim 3, characterized in that: At least one of the second flow guides is located on the first shell and / or the second shell close to the bottom surface in use; and / or, At least one of the second flow guides is located on the first shell and / or the second shell in a middle area in the up-down direction in the use state.

5. The anti-corrosion structure of the electrical equipment housing according to claim 4, characterized in that: The second flow guide is arranged obliquely.

6. The anti-corrosion structure of the electrical equipment housing according to claim 4, characterized in that: The second flow guide is a rib structure.

7. The anti-corrosion structure of the electrical equipment housing according to any one of claims 1 to 6, characterized in that: The first shell and / or the second shell is provided with a sunken threaded connection hole, the first shell and the second shell are connected by bolts, and the outer periphery of the bolts is provided with insulating glue.

8. The anti-corrosion structure of the electrical equipment housing according to claim 7, characterized in that: The bolt is made of magnesium alloy material, or the surface of the bolt is coated with a magnesium alloy coating.

9. The anti-corrosion structure of the electrical equipment housing according to any one of claims 1 to 6, characterized in that: The electrical equipment housing is an electric drive assembly housing, which includes an integrated housing and an end cover connected to the integrated housing; wherein the end cover is the first housing and the integrated housing is the second housing.

10. An electric drive assembly, characterized in that: The housing of the electric drive assembly includes the anti-corrosion structure of the electrical equipment housing according to any one of claims 1 to 9.

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