Waterproof device and method for folding type power conversion connector and electric engineering machinery

Abstract

The invention discloses a waterproof device and method for a folding type power conversion connector and an electric engineering machine. The waterproof device comprises a base, a first folding plate and a second folding plate. The base is mounted on the bottom support close to the connector socket; the first folding plate and the base are hinged together through a self-resetting part I, and the unfolded first folding plate protrudes out of the connector socket; the parts, protruding out of the connector socket, of the second folding plate and the first folding plate are hinged together through a self-reset part II. When the first folding plate is unfolded, the second folding plate is located above the connector socket, and the connector socket completely falls into the vertically downward projection area of the second folding plate. According to the waterproof device of the folding type power conversion connector, pollutants such as water drops and dust can be prevented from falling into the connector socket in the power conversion process, the pure mechanical structure is high in reliability, and the cost is low.

Description

Technical Field

[0001] The present invention relates to a waterproof device for a foldable battery swapping connector, which belongs to the field of electric construction machinery, and particularly to the field of battery swapping technology. Background Art

[0002] Compared with traditional diesel excavators, electric excavators have the characteristics of zero exhaust emissions, no pollution, energy conservation, low noise, and low maintenance costs. At the same time, electric excavators also have disadvantages such as poor mobility, inability to be far from the charging pile, short battery life, and long charging time. To solve these problems, electric excavators can adopt the battery swapping method, that is, a split design of the power battery is adopted, and continuous operation of the electric excavator is achieved by replacing the power battery.

[0003] The battery swapping connector is an important part of the battery swapping system, connecting the battery swapping box and the vehicle wiring harness, and playing roles such as transmitting high-voltage large current and communication signals. In the existing battery swapping process, when the battery swapping box is lifted away from the bottom support, the connector plug on the battery swapping box and the connector socket on the bottom support are disconnected, and the connector loses its own protection performance. Especially when the battery swapping box is lifted off the vehicle, there is no shielding above the connector socket, and pollutants such as water droplets or dust enter the connector socket. The entry of water droplets will cause insulation failure and short circuit, and the dirt or dust entering the socket will accumulate to form an insulating layer or form fine gaps, resulting in poor contact. At the same time, because the battery swapping connector carries a large current, phenomena such as connector heating and ablation are likely to occur, which poses a hazard to the vehicle's electrical system. Therefore, it is necessary to design a waterproof device for the battery swapping connector to improve the safety of the electrical system and the stability of the vehicle performance.

[0004] Existing patents have also disclosed some solutions for protecting the battery swapping connector, such as a protection device for the battery connector of an electric vehicle and an electric vehicle (CN112259874A), a battery swapping box, a battery swapping structure, a battery swapping method and a construction machinery (CN117261680A), a protection device for a battery swapping connector, a battery swapping structure and a construction machinery (CN221041684U). However, the present invention is different from the above solutions. The advantages of the present invention are, firstly, a foldable structure, which occupies a small space and is easy to arrange; secondly, low cost and high reliability. Summary of the Invention

[0005] The present invention provides a foldable waterproof device for a battery swapping connector, which can prevent pollutants such as water droplets and dust from falling into the connector socket during the battery swapping process, and has a pure mechanical structure with high reliability and low cost.

[0006] The present invention is implemented according to the following technical solutions: In a first aspect, the present invention provides a foldable waterproof device for a battery swapping connector, comprising: A base, installed on the bottom support close to the connector socket; The first folding plate is hinged to the base through the self - resetting component I, and the first folding plate protrudes from the connector socket after unfolding; The second folding plate is hinged to the first folding plate at the part protruding from the connector socket through the self - resetting component II; when the first folding plate is unfolded, the second folding plate is located above the connector socket, and the connector socket completely falls within the vertically downward projection area of the second folding plate; when the tops of the first and second folding plates are vertically pressed by the battery replacement box, they can both fold around their respective hinge points in the direction away from the connector socket, and the folded first and second folding plates can completely expose the connector socket; after the pressure is removed, the folded first and second folding plates can be reset by their respective self - resetting components to block the connector socket.

[0007] In some embodiments, the base is an angle plate with an angle less than 90 degrees, and the sharp corner of the angle plate faces the connector socket; the horizontal plate of the angle plate is welded to the bottom support; or, at least one through - hole is provided on the horizontal plate of the angle plate, and threaded holes coaxial with the through - holes are provided on the bottom support, and the horizontal plate is fixed to the bottom support by bolts cooperating with the through - holes and the threaded holes.

[0008] In some embodiments, the first folding plate is arranged at the top end of the inclined plate of the angle plate; after the first folding plate is coplanar with the inclined plate of the angle plate, the first folding plate is in a fully unfolded state, and the self - resetting torque of the self - resetting component I is resisted by the limiting component I.

[0009] In some embodiments, the self - resetting component I is a spring hinge, which is connected between the inclined plate and the first folding plate and is located on the side away from the connector socket; a lower limit block is fixed at the bottom end of the side of the first folding plate facing the connector socket, and an upper limit block is fixed at the top end of the side of the inclined plate of the angle plate facing the connector socket, and the upper and lower limit blocks are arranged oppositely to form the limiting component I; when the upper and lower limit blocks are butted, the rotation angle of the spring hinge is restricted.

[0010] In some embodiments, when the second folding plate is fully unfolded, the second folding plate is in an inclined state with the front end lower and the rear end higher, and the front end of the second folding plate is close to the connector socket, and the self - resetting torque of the self - resetting component II is resisted by the limiting component II.

[0011] In some embodiments, the self-resetting component II is a spring hinge, which is connected between the second folding plate and the first folding plate and is located on the side facing the base; between the second folding plate and the first folding plate and at both ends along the width direction of the first folding plate, there is a waterproof cloth I arranged oppositely. The waterproof cloth I extends from the connection part of the first and second folding plates to the front end of the second folding plate and the middle or lower area of the first folding plate respectively; the unfolded waterproof cloth I constitutes the limiting component II for restricting the rotation angle of the spring hinge; the unfolded waterproof cloth I can also shield the side part of the connector socket.

[0012] In some embodiments, the self-resetting component II is a spring hinge, which is connected between the second folding plate and the first folding plate and is located on the side facing the base; below the self-resetting component II at the connection part between the second folding plate and the first folding plate, there is a waterproof cloth II, which extends to both ends of the connection part to seal the connection part.

[0013] In some embodiments, at the parts where the first folding plate and the second folding plate contact the battery swapping box, there is a rolling component each, which is used to convert the sliding friction after contact into rolling friction.

[0014] In some embodiments, at the top end of the first folding plate and the front end area of the second folding plate, there is a linear through hole opened along its width direction; the edge cross bar at the linear through hole is set as a circular rod, and the rolling component is a roller, which is installed on the circular rod.

[0015] In some embodiments, the material of the roller is rubber, which plays a buffering role when contacting the battery swapping box.

[0016] In a second aspect, the present invention provides a waterproof method for the above-mentioned folding type battery swapping connector waterproof device: When a fully charged battery swapping box is to be hoisted onto the whole machine, the first folding plate contacts the battery swapping box first. Under the driving of the gravity of the battery swapping box, the first folding plate folds around the hinge point in the direction away from the connector socket; During the folding process of the first folding plate, it can drive the second folding plate to move in the direction away from the connector socket; When the fully charged battery swapping box contacts the second folding plate, under the driving of the gravity of the battery swapping box, the first and second folding plates fold around their respective hinge points in the direction away from the connector socket at the same time until the connector socket is completely exposed, so as to realize the smooth docking of the connector plug on the battery swapping box and the connector socket on the base; When the power-depleted battery replacement box is lifted off the whole machine, the connector plug is separated from the connector socket, and both the first and second folding plates are reset under the action of their respective self-resetting components; at this time, the second folding plate is located above the connector socket to cover the connector socket and prevent foreign objects from entering the connector socket.

[0017] In a third aspect, the present invention provides an electric engineering machinery, including a battery replacement base, and the above-mentioned folding type battery replacement connector waterproof device is installed on the battery replacement base.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The waterproof device can prevent pollutants such as water droplets and dust from falling into the connector socket during the battery replacement process.

[0019] 2. The pure mechanical structure has high reliability. The combination of the folding structure and the spring hinge enables the rainproof device to be automatically activated when the battery replacement box is removed. It has low cost, a compact structure, occupies a small space, and will not interfere with the battery replacement box. Description of the Drawings

[0020] The drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0021] In the drawings: Figure 1 is a perspective view of the folding type battery replacement connector waterproof device of the present invention; Figure 2 is a side view of the folding type battery replacement connector waterproof device of the present invention; Figure 3 is a partial view of the folding type battery replacement connector waterproof device of the present invention; Figure 4 is an application view (expanded state) of the folding type battery replacement connector waterproof device of the present invention; Figure 5 is an application view (folded state) of the folding type battery replacement connector waterproof device of the present invention.

[0022] Reference numerals in the drawings: base 2, waterproof device 3, connector socket 21, base 31, spring hinge 32, first folding plate 33, roller 34, second folding plate 35, waterproof cloth 36, waterproof cloth 37, lower limit block 38, upper limit block 39.

[0023] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed Embodiments

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown in the figure, a waterproof device 3 for a foldable power exchange connector includes a base 31, a first folding plate 33, and a second folding plate 35. The base 31 is installed on the bottom bracket 2 near the connector socket 21. The first folding plate 33 is hinged to the base 31 through a self-resetting component I, and the unfolded first folding plate 33 protrudes from the connector socket 21. The second folding plate 35 is hinged to the first folding plate 33 at the part protruding from the connector socket 21 through a self-resetting component II. When the first folding plate 33 is unfolded, the second folding plate 35 is located above the connector socket 21, and the connector socket 21 completely falls within the vertically downward projection area of the second folding plate 35. When the tops of the first and second folding plates 33 and 35 are vertically pressed down by the power exchange box, they can all be folded away from the connector socket 21 around their respective hinge points. After folding, the first and second folding plates 33 and 35 can completely expose the connector socket 21. After the pressure is removed, the folded first and second folding plates 33 and 35 can be reset through their respective self-resetting components to block the connector socket 21.

[0028] As can be seen from the above, 1. When the power exchange box with insufficient power is lifted off the whole machine, the waterproof device can automatically open to cover the connector socket to prevent pollutants such as water droplets and dust from falling into the connector socket. 2. When the fully charged power exchange box is to be lifted onto the whole machine, the waterproof device can timely retract the rain shelter under the drive of the gravity of the power exchange box to achieve the smooth docking of the connector plug on the power exchange box and the connector socket on the bottom bracket.

[0029] The following further describes the specific structure of the above-mentioned base.

[0030] As Figure 1 、 Figure 2 、 Figure 3 shown in the figure, the base 31 is an angle plate with an angle less than 90 degrees, and the sharp corner of the angle plate faces the connector socket 21. The horizontal plate in the angle plate is welded to the bottom bracket 2. Or, at least one through hole is provided on the horizontal plate of the angle plate, and threaded holes coaxial with the through holes are provided on the bottom bracket 2. The horizontal plate is fixed to the bottom bracket 2 by bolts cooperating with the through holes and the threaded holes.

[0031] It should be noted that the base 31 is fixed on the bottom bracket 2, and its material can be stainless steel, which can be adjusted according to the actual state of the bottom bracket 2.

[0032] The following further describes the specific structure of the above-mentioned first folding plate.

[0033] As Figure 1 、 Figure 2 、 Figure 3As shown, the first folding plate 33 is arranged at the top end of the inclined plate in the corner plate; after the first folding plate 33 is coplanar with the inclined plate in the corner plate, the first folding plate 33 is in a fully unfolded state, and the reset torque of the self-resetting component I is resisted by the limiting component I.

[0034] For a further solution, as Figure 1 , Figure 2 , Figure 3 shown, the self-resetting component I is a spring hinge 32, which is connected between the inclined plate and the first folding plate 33 and is located on the side away from the connector socket 21; a lower limit block 38 is fixed at the bottom end of the side of the first folding plate 33 facing the connector socket 21, and an upper limit block 39 is fixed at the top end of the side of the inclined plate in the corner plate facing the connector socket 21. The upper limit block 39 and the lower limit block 38 are arranged oppositely to form the limiting component I; when the upper and lower limit blocks 38 and 39 are butted, the rotation angle of the spring hinge 32 is restricted.

[0035] The following further describes the specific structure of the second folding plate above.

[0036] As Figure 1 , Figure 2 , Figure 3 shown, when the second folding plate 35 is fully unfolded, the second folding plate 35 is in an inclined state with the front end lower and the rear end higher, and the front end of the second folding plate 35 is close to the connector socket 21, and the reset torque of the self-resetting component II is resisted by the limiting component II.

[0037] For a further solution, as Figure 1 , Figure 2 , Figure 3 shown, the self-resetting component II is a spring hinge 32, which is connected between the second folding plate 35 and the first folding plate 33 and is located on the side facing the base 2; a waterproof cloth 36 is connected to both ends of the second folding plate 35 and the first folding plate 33 along the width direction of the first folding plate 33, and the waterproof cloth 36 extends from the connection of the first and second folding plates 33 and 35 to the front end of the second folding plate 35 and the middle or lower region of the first folding plate 33 respectively; the unfolded waterproof cloth 36 forms the limiting component II for restricting the rotation angle of the spring hinge 32; the unfolded waterproof cloth 36 can also shield the side of the connector socket 21.

[0038] For a further solution, as Figure 1 , Figure 2As shown, the self-resetting component II is a spring hinge 32, which is connected between the second folding plate 35 and the first folding plate 33 and is located on the side facing the base 2; a waterproof cloth 37 is provided below the connecting part of the second folding plate 35 and the first folding plate 33 and at the position of the self-resetting component II. The waterproof cloth 37 extends to both ends of the connecting part to seal the connecting part.

[0039] It should be noted that there are a total of three spring hinges 32. Two are used to connect the base 31 and the first folding plate 33, and the other is used to connect the first folding plate 33 and the second folding plate 35; the material of the first folding plate 33 can be stainless steel, and the material of the second folding plate 35 can be plastic. There are a total of two waterproof cloths 36, which connect the first folding plate 33 and the second folding plate 35 and are located on both sides of these two folding plates respectively, playing a role in rain prevention and at the same time playing a limiting role. The waterproof cloth 37 connects the first folding plate 33 and the second folding plate 35 and is located below the spring hinge 32 to prevent rainwater from flowing down through the connection gap between the first folding plate 33 and the second folding plate 35.

[0040] The above waterproof device will be further described below.

[0041] As shown in Figure 1 、 Figure 2 As shown, a rolling component is provided at each part where the first folding plate 33 and the second folding plate 35 contact the power exchange box, which is used to convert the sliding friction after contact into rolling friction, so that the rainproof device folds more smoothly when subjected to the pressure of the power exchange box.

[0042] For a further solution, as shown in Figure 1 、 Figure 2 As shown, a linear through hole is provided along the width direction at the top end of the first folding plate 33 and the front end area of the second folding plate 35; the edge cross bar at the position of the linear through hole is set as a circular rod, and the rolling component is a roller 34, and the roller 34 is installed on the circular rod.

[0043] For a further solution, the material of the roller 34 is rubber, which plays a buffering role when contacting the power exchange box.

[0044] As shown in Figure 4 、 Figure 5 As shown, a waterproof method for the foldable power exchange connector waterproof device 3 based on the above: When a fully charged power exchange box is to be hoisted onto the whole machine, the first folding plate 33 first contacts the power exchange box. Under the drive of the gravity of the power exchange box, the first folding plate 33 folds around the hinge point in the direction away from the connector socket 21; During the folding process of the first folding plate 33, it can drive the second folding plate 35 to move in the direction away from the connector socket 21; When a fully charged battery swapping box comes into contact with the second folding plate 35, driven by the gravity of the battery swapping box, the first and second folding plates 33 and 35 simultaneously fold around their respective hinge points in a direction away from the connector socket 21 until the connector socket 21 is completely exposed, so as to achieve the smooth docking of the connector plug on the battery swapping box and the connector socket 21 on the bottom bracket 2; When the undercharged battery swapping box is lifted off the whole machine, the connector plug is separated from the connector socket 21, and the first and second folding plates 33 and 35 are reset under the action of their respective spring hinges 32; at this time, the second folding plate 35 is located above the connector socket 21 to cover the connector socket 21 and prevent foreign objects from entering the connector socket 21.

[0045] In summary, the present invention provides a folding battery swapping connector waterproof device, which realizes the following functions and effects: 1. The waterproof device can prevent pollutants such as water droplets and dust from falling into the connector socket during the battery swapping process.

[0046] 2. The pure mechanical structure has high reliability. The combination of the folding structure and the spring hinge enables the rainproof device to be automatically activated when the battery swapping box is removed. It has low cost, a compact structure, occupies little space, and will not interfere with the battery swapping box.

[0047] The electric engineering machinery provided by the present invention will be described below. The electric engineering machinery described below can be mutually corresponding and referred to the folding battery swapping connector waterproof device described above.

[0048] An electric engineering machinery provided by the present invention may include the folding battery swapping connector waterproof device described in any one of the above embodiments.

[0049] The beneficial effects achieved by the electric engineering machinery provided by the present invention are consistent with those achieved by the folding battery swapping connector waterproof device provided by the present invention, so they will not be elaborated here.

[0050] It should be noted that the above-mentioned electric engineering machinery may be an electric excavator.

[0051] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0052] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features contained in other embodiments rather than other features, the combination of features of different embodiments also means that it is within the protection scope of the present invention and forms different embodiments. For example, in the above embodiments, those skilled in the art can use them in a combined manner according to the known technical solutions and the technical problems to be solved by this application.

[0053] The above are only the preferred embodiments of the present invention, and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent can make some changes or modifications to equivalent embodiments by using the technical content prompted above without departing from the technical solution scope of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A waterproof device for a foldable battery swapping connector, characterized in that, Including: A base, mounted on a base plate near the connector socket; A first folding plate, hinged to the base by a self - resetting component Ⅰ, and the first folding plate protrudes from the connector socket after being unfolded; A second folding plate, hinged to the first folding plate at the part protruding from the connector socket by a self - resetting component Ⅱ; when the first folding plate is unfolded, the second folding plate is located above the connector socket, and the connector socket completely falls within the vertically downward projected area of the second folding plate; When the tops of the first and second folding plates are vertically pressed down by the battery replacement box, they can both fold around their respective hinge points in a direction away from the connector socket, and the folded first and second folding plates can completely expose the connector socket; After the pressure is removed, the folded first and second folding plates can be reset by their respective self - resetting components to block the connector socket.

2. The waterproof device for a foldable battery replacement connector according to claim 1, characterized in that: The base is an angle plate with an angle less than 90 degrees, and the sharp angle of the angle plate faces the connector socket; The horizontal plate in the angle plate is welded to the base plate; or, at least one through - hole is provided on the horizontal plate of the angle plate, and threaded holes co - axially arranged with the through - holes are provided on the base plate, and the horizontal plate is fixed to the base plate by bolts cooperating with the through - holes and the threaded holes.

3. The waterproof device for a foldable battery replacement connector according to claim 2, characterized in that: The first folding plate is arranged at the top end of the inclined plate in the angle plate; after the first folding plate is coplanar with the inclined plate in the angle plate, the first folding plate is in a fully unfolded state, and a limiting component Ⅰ is used to resist the reset torque of the self - resetting component Ⅰ.

4. The waterproof device for a foldable battery replacement connector according to claim 3, characterized in that: The self - resetting component Ⅰ is a spring hinge, which is connected between the inclined plate and the first folding plate and is located on the side away from the connector socket; A lower limit block is fixed at the bottom end of the side of the first folding plate facing the connector socket, and an upper limit block is fixed at the top end of the side of the inclined plate in the angle plate facing the connector socket. The upper and lower limit blocks are arranged oppositely to form the limiting component Ⅰ; when the upper and lower limit blocks are butted, the rotation angle of the spring hinge is restricted.

5. The waterproof device for a foldable battery replacement connector according to claim 1, characterized in that: When the second folding plate is fully unfolded, the second folding plate is in an inclined state with the front end lower and the rear end higher, and the front end of the second folding plate is close to the connector socket, and a limiting component Ⅱ is used to resist the reset torque of the self - resetting component Ⅱ.

6. The waterproof device for a foldable battery replacement connector according to claim 5, characterized in that: The self - resetting component Ⅱ is a spring hinge, which is connected between the second folding plate and the first folding plate and is located on the side facing the base plate; Two oppositely arranged waterproof cloths Ⅰ are respectively connected at both ends of the second folding plate and the first folding plate along the width direction of the first folding plate. The waterproof cloth Ⅰ extends from the connection part of the first and second folding plates to the front end of the second folding plate and the middle or lower area of the first folding plate respectively; The unfolded waterproof cloth I forms the limiting component II, which is used to limit the rotation angle of the spring hinge; the unfolded waterproof cloth I can also cover the side part of the connector socket.

7. The foldable power exchange connector waterproof device according to claim 5, wherein: The self-resetting component II is a spring hinge, which is connected between the second folding plate and the first folding plate and is located on the side facing the bottom tray; A waterproof cloth II is provided below the connecting part of the second folding plate and the first folding plate and at the lower part of the self-resetting component II. The waterproof cloth II extends to both ends of the connecting part to seal the connecting part.

8. The foldable power exchange connector waterproof device according to claim 1, wherein: A rolling component is provided at each contact part of the first folding plate and the second folding plate with the power exchange box, which is used to convert the sliding friction after contact into rolling friction.

9. The foldable power exchange connector waterproof device according to claim 8, wherein: A linear through hole is provided at the top end of the first folding plate and the front end area of the second folding plate along their width directions; the edge cross bar at the linear through hole is a circular rod, and the rolling component is a roller, which is installed on the circular rod.

10. The foldable power exchange connector waterproof device according to claim 8, wherein: The roller is made of rubber, which plays a buffering role when contacting the power exchange box.

11. A waterproof method for the foldable power exchange connector waterproof device according to any one of claims 1 to 10, wherein: When a fully charged power exchange box is to be hoisted onto the whole machine, the first folding plate contacts the power exchange box first. Under the driving of the gravity of the power exchange box, the first folding plate folds around the hinge point in the direction away from the connector socket; During the folding process of the first folding plate, it can drive the second folding plate to move in the direction away from the connector socket; When the fully charged power exchange box contacts the second folding plate, under the driving of the gravity of the power exchange box, the first and second folding plates fold around their respective hinge points in the direction away from the connector socket until the connector socket is completely exposed, so as to realize the smooth docking of the connector plug on the power exchange box and the connector socket on the bottom tray; When the discharged power exchange box is lifted off the whole machine, the connector plug is separated from the connector socket, and the first and second folding plates are reset under the action of their respective self-resetting components; At this time, the second folding plate is located above the connector socket to cover the connector socket and prevent foreign objects from entering the connector socket.

12. An electric engineering machinery, including a power exchange bottom tray, wherein: The foldable power exchange connector waterproof device according to any one of claims 1 to 10 is installed on the power exchange bottom tray.

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