Built-in screw fixing type waterproof structure for inverter

Abstract

The built-in screw fixing type waterproof structure comprises an upper cover and a box body which are mutually covered, a plurality of waterproof nuts are arranged on the periphery of the box body, the top edge of each waterproof nut sinks to enable the middle of the waterproof nut to protrude to form a boss, a waterproof rubber mat is sleeved on the outer side of the boss, and the upper cover is provided with positioning holes corresponding to the waterproof nuts. Screws penetrate through the positioning holes and are locked in the waterproof nuts, and meanwhile the upper cover is pressed on the waterproof rubber mat to extrude the waterproof rubber mat. The screw penetrates through the positioning hole and is locked in the threaded hole of the waterproof nut, in the locking process, the upper cover moves downwards and gradually extrudes the waterproof rubber mat, the waterproof rubber mat is extruded to generate elastic deformation, and the joint of the upper cover and the waterproof nut is filled and sealed, so that the waterproof effect is good, and the waterproof effect is good. Therefore, moisture is effectively prevented from entering the box body through the positioning holes, the waterproof performance of the inverter is effectively improved, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronics, in particular to a built-in screw fixed waterproof structure for an inverter. Background Technique

[0002] An inverter is an electronic device that converts direct current into alternating current and is widely used in scenarios that require converting battery, solar panel or other DC power sources into alternating current for power grids, commercial uses or household electricity. Inverters are used in many fields, including but not limited to solar systems, uninterruptible power supplies (UPS), electric vehicle chargers, and portable power supplies. Since inverters are usually installed in outdoor open environments, they must be able to withstand the influence of harsh weather conditions, such as rain, moisture, dust, etc., to avoid the influence of moisture or dust impurities on the components inside the inverter, which may cause the inverter to short-circuit or other situations that affect the normal use and service life of the inverter. Although the inverters on the market currently have waterproof sealing treatments, however, since the outer shell of the inverter generally uses screws to lock the upper cover body to the lower box body to achieve the connection and fixation of the outer shell, there are easily gaps between the screws and the screw holes, so that water droplets or moisture can enter the inside of the inverter along the gaps. Moreover, during the process of screwing the screw into the threaded hole, the external thread of the screw will cause certain scratches on the side of the threaded hole, making it possible for the gap between the screw and the threaded hole to expand. Especially after multiple disassembly and assembly, the wear is serious, greatly reducing the waterproof effect and posing greater risks and hidden dangers.

[0003] Therefore, there are defects in the prior art and improvement is needed. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a built-in screw fixed waterproof structure for an inverter.

[0005] The technical solution of the utility model is as follows: A built-in screw fixed waterproof structure for an inverter is provided, including: an upper cover and a box body that are covered with each other. A plurality of waterproof nuts are arranged around the box body. The top edge of the waterproof nut sinks so that the middle part bulges to form a boss. A waterproof rubber pad is sleeved outside the boss. The upper cover is provided with positioning holes corresponding to the waterproof nuts. The screw passes through the positioning holes and is locked in the waterproof nuts, and at the same time, the upper cover is pressed against the waterproof rubber pad to squeeze the waterproof rubber pad.

[0006] Further, a counterbore is provided at the position corresponding to the positioning hole on the upper cover, and the top of the screw is located in the counterbore.

[0007] Further, when the screw is locked in the counterbore, the top surface of the screw is flush with or lower than the upper plane of the upper cover.

[0008] Further, the upper cover is formed by sheet metal stamping.

[0009] Further, the edge of the upper cover is folded downward and wraps around the outer side of the edge of the box body. A U-shaped waterproof gasket is sleeved on the top edge of the edge of the box body. When the upper cover is closed on the box body, the U-shaped waterproof gasket is squeezed.

[0010] Further, structural platforms are provided around the box body, and the waterproof nuts are arranged on the structural platforms.

[0011] With the above solution, in the present utility model, screws pass through the positioning holes and are locked in the threaded holes of the waterproof nuts. During the locking process, the upper cover will move downward and gradually squeeze the waterproof gasket. The waterproof gasket undergoes elastic deformation under the extrusion and fills and seals the joint between the upper cover and the waterproof nut, thereby effectively preventing moisture from entering the interior of the box body through the positioning holes, effectively improving the waterproof performance of the inverter, and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the present utility model.

[0013] Figure 2 is a sectional view of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will describe the present utility model in detail with reference to the drawings and specific embodiments.

[0015] Please refer to Figure 1 、 Figure 2 , the present utility model provides a built-in screw fixed waterproof structure for an inverter, including: an upper cover 1 and a box body 2 that are covered with each other. A plurality of waterproof nuts 21 are arranged around the box body 2. The top edge of the waterproof nut 21 sinks so that the middle part protrudes to form a convex platform 22. A waterproof gasket 23 is sleeved outside the convex platform 22. The upper cover 1 is provided with positioning holes 11 corresponding to the waterproof nuts 21. Screws 3 pass through the positioning holes 11 and are locked in the waterproof nuts 21, and at the same time, the upper cover 1 is pressed against the waterproof gasket 23 to squeeze the waterproof gasket 23.

[0016] During assembly, the upper cover 1 is covered on the box body 2 so that the positioning holes 11 on the upper cover 1 correspond to the threaded holes on the waterproof nuts 21. The screw 3 is passed through the positioning hole 11 and locked into the threaded hole of the waterproof nut 21. During the locking process, the upper cover 1 will move downward and gradually squeeze the waterproof gasket 23. The waterproof gasket 23 is elastically deformed under extrusion and fills and seals the joint between the upper cover 1 and the waterproof nut 21, thereby effectively preventing moisture from entering the interior of the box body 2 through the positioning holes, effectively improving the waterproof performance of the inverter and enhancing safety.

[0017] In some embodiments, a counterbore 12 is provided at the position corresponding to the positioning hole 11 on the upper cover 1, and the top of the screw 3 is located in the counterbore 12. When the screw 3 is locked in the counterbore 12, the top surface of the screw 3 is flush with or lower than the upper plane of the upper cover 1. By providing the counterbore 12, the top of the screw 3 will not be higher than the upper plane of the upper cover 1, thus meeting the appearance requirements.

[0018] In some embodiments, the edge of the upper cover 1 is folded downward and wrapped outside the edge of the box body 2, and a U-shaped waterproof gasket 4 is sleeved on the top of the edge of the box body 2. When the upper cover 1 is covered on the box body 2, the U-shaped waterproof gasket 4 is squeezed. The edge of the upper cover 1 is provided with a hem, thereby preventing moisture from entering the interior of the box body 2 through the gap between the contact surfaces of the upper cover 1 and the box body 2. At the same time, by sleeving the U-shaped waterproof gasket 4 on the top of the edge of the box body 2, when the upper cover 1 is covered and fixed on the box body 2, the U-shaped waterproof gasket 4 can be squeezed, causing the U-shaped waterproof gasket 4 to elastically deform, thereby filling and sealing the gap and improving the waterproof performance.

[0019] In some embodiments, the upper cover 1 is formed by sheet metal stamping. Sheet metal is easily formed into the corresponding counterbore 12 and hem through stamping, is easy to process and form, and is strong and durable, and can ensure long-term use even in outdoor open-air environments. At the same time, the self-weight of the sheet metal can effectively squeeze the waterproof gasket 23 and the U-shaped waterproof gasket 4, ensuring the waterproof and sealing performance of the waterproof gasket 23 and the U-shaped waterproof gasket 4.

[0020] In some embodiments, a structural platform 24 is provided around the box body 2, and the waterproof nut 21 is arranged on the structural platform 24. By providing the structural platform 24, it is convenient to arrange the waterproof nut 21, and the locking position of the screw 3 can be separated from the circuit components inside the inverter box body 2 by a certain distance, avoiding the situation where the moisture entering the box body 2 through the positioning hole directly drips on the circuit components when the waterproof gasket 23 and the U-shaped waterproof gasket 4 are aged and damaged, and improving the safety performance.

[0021] In summary, for the present utility model, a screw passes through the positioning hole and is locked in the threaded hole of the waterproof nut. During the locking process, the upper cover moves downward and gradually presses the waterproof gasket. The waterproof gasket undergoes elastic deformation under the extrusion, and fills and seals the joint between the upper cover and the waterproof nut, thereby effectively preventing moisture from entering the interior of the box through the positioning hole, effectively improving the waterproof performance of the inverter, and enhancing the safety.

[0022] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An internal screw-fixed waterproof structure for an inverter, characterized in that, Comprising: An upper cover and a box body that are mutually covered. A number of waterproof nuts are provided around the box body. The top edge of the waterproof nut sinks so that the middle part bulges to form a boss. A waterproof gasket is sleeved outside the boss. The upper cover is provided with positioning holes corresponding to the waterproof nuts. Screws pass through the positioning holes and are locked in the waterproof nuts, and at the same time, the upper cover is pressed against the waterproof gasket to squeeze the waterproof gasket.

2. The built-in screw-fixed waterproof structure for an inverter according to claim 1, characterized in that, A counterbore is provided at the upper cover corresponding to the positioning hole, and the top of the screw is located in the counterbore.

3. The built-in screw-fixed waterproof structure for an inverter according to claim 2, wherein, When the screw is locked in the counterbore, the top surface of the screw is flush with or lower than the upper plane of the upper cover.

4. The built-in screw-fixed waterproof structure for an inverter according to claim 1, characterized in that, The upper cover is formed by sheet metal stamping.

5. The built-in screw-fixed waterproof structure for an inverter according to claim 1, characterized in that, The edge of the upper cover is folded downwards and wrapped outside the edge of the box body. A U-shaped waterproof washer is sleeved on the top of the edge of the box body. When the upper cover is covered on the box body, the U-shaped waterproof washer is squeezed.

6. The built-in screw-fixed waterproof structure for an inverter according to claim 1, characterized in that, Structural platforms are provided around the box body, and the waterproof nuts are arranged on the structural platforms.

Images