Built-in screw bottom fixed type waterproof structure for inverter

Abstract

The utility model discloses a built-in screw bottom fixed type waterproof structure for an inverter, comprising an upper cover and a box body which are mutually covered, the periphery of the inner side of the upper cover is provided with a plurality of waterproof nuts, the threaded holes of the waterproof nuts face the direction of the box body, the box body is provided with screw sleeves corresponding to the waterproof nuts, and the screw sleeves are connected with the waterproof nuts. The end of the threaded sleeve is embedded into the waterproof nut, the threaded sleeve is provided with a positioning hole corresponding to a threaded hole of the waterproof nut, and a screw penetrates through the positioning hole from the lower portion and is locked in the threaded hole of the waterproof nut. According to the utility model, the waterproof nut is arranged at the inner side of the upper cover, so that when the upper cover covers the box body, the direction of the threaded hole faces downwards, and when the inverter is placed outdoors for use, the situation that water is gathered at the positioning hole and permeates into the box body through the positioning hole is avoided; and the waterproof performance of the inverter is effectively improved.

Description

Technical Field

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

[0002] An inverter is an electronic device that converts direct current into alternating current and is widely used in scenarios where it is necessary to convert a battery, a solar panel or other direct current power sources into alternating current required for the grid, commercial use 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-air environments, they must be able to withstand the influence of harsh weather conditions, such as rain, moisture, dust, etc., to avoid moisture or dust impurities affecting 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 a certain scratch to 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 potential hazards.

[0003] Therefore, there are defects in the prior art and improvement is needed. Summary 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 bottom fixed waterproof structure for an inverter.

[0005] The technical solution of the utility model is as follows: A built-in screw bottom 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 inner side of the upper cover, and the threaded holes of the waterproof nuts face the direction of the box body. The box body is provided with screw sleeves corresponding to the waterproof nuts. The end of the screw sleeve is embedded in the waterproof nut, and the screw sleeve is provided with positioning holes corresponding to the threaded holes of the waterproof nuts. A screw passes through the positioning hole from below and is locked in the threaded hole of the waterproof nut.

[0006] Further, a guiding groove is arranged at one end of the waterproof nut facing the screw sleeve, and a convex platform is arranged at the end of the screw sleeve. The convex platform is movably embedded in the guiding groove.

[0007] Further, a chamfer or a fillet is arranged at the opening edge of the guiding groove.

[0008] Further, a receiving groove is provided on the outer side wall of the boss, and a waterproof rubber ring is sleeved in the receiving groove, and the waterproof rubber ring is extruded by the inner side wall of the guiding groove and the receiving groove.

[0009] Further, a counterbore is provided on the screw sleeve corresponding to the positioning hole, and the top of the screw is located in the counterbore.

[0010] Further, the edge of the upper cover is folded downward and wrapped outside the edge of the box body, a U-shaped waterproof gasket is sleeved on the top of the edge of the box body, and the U-shaped waterproof gasket is extruded when the upper cover is closed on the box body.

[0011] Further, structural platforms are provided around the box body, and the screw sleeve is arranged on the structural platforms.

[0012] With the above solution, in the present utility model, the waterproof nut is arranged inside the upper cover, so that when the upper cover is closed on the box body, the direction of the threaded hole faces downward, thereby avoiding the situation that water accumulates at the positioning hole and seeps into the inside of the box body through the positioning hole during the use of the inverter outdoors, effectively improving the waterproof performance of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model.

[0014] Figure 2 is an assembly schematic diagram between the waterproof nut and the screw sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Please refer to Figure 1 、 Figure 2 , the present utility model provides a built-in screw bottom 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 11 are provided around the inside of the upper cover 1, and the threaded holes 111 of the waterproof nuts 11 face the direction of the box body 2. The box body 2 is provided with screw sleeves 21 corresponding to the waterproof nuts 11. The end of the screw sleeve 21 is embedded in the waterproof nut 11. The screw sleeve 21 is provided with positioning holes 211 corresponding to the threaded holes 111 of the waterproof nuts 11. A screw 3 passes through the positioning holes 211 from below and is locked in the threaded holes 111 of the waterproof nuts 11.

[0017] During assembly, the upper cover 1 is covered on the box body 2, so that the threaded holes 111 of the waterproof nuts 11 on the upper cover 1 correspond to the positioning holes 211 of the screw sleeves 21 on the box body 2. The screw 3 is passed through the positioning hole 211 from below, and the screw 3 is locked in the threaded hole 111 of the waterproof nut 11. At this time, the front end of the screw sleeve 21 is embedded in the waterproof nut 11, which can provide a guiding and positioning function for the locking of the screw 3, so as to lock the upper cover 1 on the box body 2. Generally, in the case of rainfall or other situations that cause water droplets to splash, water droplets or water flows are generally splashed on the top surface or side wall of the inverter. Therefore, by arranging the waterproof nut 11 on the inner side of the upper cover 1, when the upper cover 1 is covered on the box body 2, the direction of the threaded hole 111 faces downward, so as to avoid the situation that water accumulates at the positioning hole 211 and seeps into the inside of the box body 2 during the process of the inverter being placed outdoors for use, effectively improving the waterproof performance of the inverter. In addition, even if water or water droplets splash from bottom to top to the corresponding locking position of the screw 3, under the action of gravity, the droplets will gather and drip downward, and will not enter the inside of the box body 2, effectively improving the waterproof performance.

[0018] In some embodiments, a guiding groove 112 is arranged at one end of the waterproof nut 11 facing the screw sleeve 21, a boss 212 is arranged at the end of the screw sleeve 21, and the boss 212 is movably embedded in the guiding groove 112. By arranging the guiding groove 112 on the waterproof nut 11 and making the boss 212 at the front end of the screw sleeve 21 embedded in the guiding groove 112, a positioning and guiding function is achieved, which is convenient for the assembly and fixation between the upper cover 1 and the box body 2.

[0019] In some embodiments, a chamfer or fillet is arranged at the opening edge of the guiding groove 112. By providing a certain guiding and deviation-correcting function through the chamfer or fillet, through the contact between the boss 212 at the front end of the screw sleeve 21 and the chamfer or fillet, the direction of the screw sleeve 21 is guided by the chamfer or fillet, so as to realize the positioning and guiding between the screw sleeve 21 and the waterproof nut 11.

[0020] In some embodiments, a receiving groove 213 is arranged on the outer side wall of the boss 212, a waterproof rubber ring 214 is sleeved in the receiving groove 213, and the waterproof rubber ring 214 is extruded by the inner side wall of the guiding groove 112 and the receiving groove 213. By sleeving the waterproof rubber ring 214 in the receiving groove 213, when the boss 212 is embedded in the guiding groove 112, the waterproof rubber ring 214 is clamped and extruded by the receiving groove 213 of the boss 212 and the guiding groove 112, so that the waterproof rubber ring 214 undergoes elastic deformation, thereby sealing the space between the receiving groove 213 and the guiding groove 112, so as to achieve waterproof sealing at the joint between the screw sleeve 21 and the waterproof nut 11.

[0021] In some embodiments, a counterbore 215 is provided in the threaded sleeve 21 corresponding to the positioning hole 211, and the top of the screw 3 is located in the counterbore 215. The counterbore 215 is used to accommodate the top of the screw 3, avoiding the situation that the top of the screw 3 protrudes from the lower part of the box body 2 and affects the appearance, thus meeting the requirements of the product appearance.

[0022] In some embodiments, the edge of the upper cover 1 is folded downward and wrapped outside the edge of the box body 2. 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 closed on the box body 2, the U-shaped waterproof gasket 4 is squeezed. A hem is provided at the edge of the upper cover 1, thus preventing water 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 closed and fixed on the box body 2, the U-shaped waterproof gasket 4 can be squeezed, causing the U-shaped waterproof gasket 4 to undergo elastic deformation, thereby filling and sealing the gap and improving the waterproof performance.

[0023] In some embodiments, a structural platform 22 is provided around the box body 2, and the threaded sleeve is arranged on the structural platform 22. By providing the structural platform 22, it is convenient to arrange the threaded sleeve 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 that when the waterproof rubber ring 214 and the U-shaped waterproof gasket 4 are aged and damaged and affect the waterproof performance, the water entering the interior of the box body 2 directly drips on the circuit components, thus improving the safety performance.

[0024] In summary, by arranging the waterproof nut inside the upper cover of the present utility model, when the upper cover is closed on the box body, the direction of the threaded hole faces downward, thus avoiding the situation that water accumulates at the positioning hole and seeps into the interior of the box body during the use of the inverter outdoors, effectively improving the waterproof performance of the inverter.

[0025] The above are only the preferred embodiments of the present utility model and are not used 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. A built-in screw bottom fixed waterproof structure for an inverter, characterized in that: include: The upper cover and the box body are covered with each other, and a plurality of waterproof nuts are arranged around the inner side of the upper cover, the threaded holes of the waterproof nuts are facing the direction of the box body, the box body is provided with screw sleeves corresponding to the waterproof nuts, the ends of the screw sleeves are embedded in the waterproof nut, and the screw sleeves are provided with positioning holes corresponding to the threaded holes of the waterproof nut, and screws are passed through the positioning holes from below and locked in the threaded holes of the waterproof nut.

2. The built-in screw bottom fixed waterproof structure for inverter according to claim 1, characterized in that: A guide groove is arranged at one end of the waterproof nut facing the screw sleeve, and a boss is arranged at the end of the screw sleeve, and the boss is movably embedded in the guide groove.

3. The built-in screw bottom fixed waterproof structure for inverter according to claim 2, characterized in that: The opening edge of the guide groove is provided with a chamfer or a rounded corner.

4. The built-in screw bottom fixed waterproof structure for inverter according to claim 2, characterized in that: The outer side wall of the boss is provided with a receiving groove, a waterproof rubber ring is sleeved in the receiving groove, and the waterproof rubber ring is squeezed by the inner side wall of the guide groove and the receiving groove.

5. The built-in screw bottom fixed waterproof structure for inverter according to claim 1, characterized in that: The screw sleeve is provided with a sinker corresponding to the positioning hole, and the top of the screw is located in the sinker.

6. The built-in screw bottom fixed waterproof structure for inverter according to claim 1, characterized in that: The edge of the upper cover is folded downward and wrapped around the outer edge of the box body. A U-shaped waterproof gasket is sleeved on the top of the edge of the box body. When the upper cover is closed on the box body, the U-shaped waterproof gasket is squeezed.

7. The built-in screw bottom fixed waterproof structure for inverter according to claim 1, characterized in that: A structural platform is arranged around the box body, and the screw sleeve is arranged on the structural platform.

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