A photovoltaic micro inverter chassis

Abstract

The invention relates to the technical field of photovoltaic micro-inverters, and discloses a photovoltaic micro-inverter chassis, comprising a chassis, a cover opening and closing assembly, a power-off maintenance mechanism, and a fixed clamping assembly. The cover opening and closing assemblies are arranged on the outer surfaces of both sides of the chassis. The cover opening and closing assemblies comprise a cylinder, which is fixedly mounted on the outer surface of the chassis. The cylinder is fixedly connected to a push rod through an output shaft, and a toothed plate is fixedly connected to the outer surface of the push rod. Gears are arranged on both sides of the toothed plate. A driving gear is mounted above the toothed plate through surface tooth meshing. The power-off maintenance mechanism comprises an active gear, which is mounted below the toothed plate through surface tooth meshing. The invention achieves the goal of stopping the inverter from working when a worker performs maintenance on the inverter by cooperating between the cover opening and closing assembly and the power-off maintenance mechanism, without the need for manual operation to open the cover and disconnect the connection to the connecting line.

Description

Technical Field

[0001] The present invention relates to the technical field of micro inverters, and in particular to a photovoltaic micro inverter chassis. Background Art

[0002] Photovoltaic micro-inverter is an inverter specially used in solar photovoltaic systems. Its main function is to convert the direct current generated by solar panels into alternating current to supply homes, offices or other devices that require alternating current. Photovoltaic micro-inverters are usually installed near each photovoltaic panel in the solar photovoltaic system and connected to each photovoltaic panel. By converting direct current into alternating current, photovoltaic micro-inverters can convert the solar energy generated by photovoltaic panels into electricity that can be directly used. The micro-inverter chassis is a shell structure used to accommodate and protect the micro-inverter. The chassis design should facilitate the repair and maintenance of the inverter, considering the structural design that is easy to disassemble and assemble. The Chinese patent "CN201811210363.2" discloses an inverter chassis structure for photovoltaic cells, which involves the field of inverter technology. It proposes that: a plurality of spring guide columns are provided on the inner bottom surface of the box; limit columns are provided on the two opposite inner sides of the box; a screw hole is provided on the two opposite sides of the box; an air outlet is also provided on one side of the bottom surface of the box; the inner box is installed in the box, and the two opposite end surfaces of the inner box are respectively provided with limit grooves; a plurality of guide sleeves are provided on the bottom surface of the inner box; a plurality of heat dissipation holes are arranged side by side on one side of the inner box; the box cover is fixed to the box by bolts, and the inverter circuit is protected by the double-layer structure of the box and the inner box, thereby improving the electromagnetic shielding effect; and by arranging a guide column and guide sleeve structure between the box and the inner box, and filling a buffer pad, the shock absorption effect is greatly increased, the earthquake resistance of the inverter is improved, and by opening an air outlet on the bottom surface of the box, dust is prevented from entering the inverter through the heat dissipation channel.

[0003] It can be seen from the above-mentioned device that although the above-mentioned chassis arrangement has a better heat dissipation method relative to the photovoltaic inverter, the applicant believes that the following defects still exist:

[0004] The connection structure of the existing inverter chassis is connected by bolts and nuts when in use, which is inconvenient to disassemble during maintenance. In addition, the adapter cable needs to be manually removed before the internal maintenance can be carried out, which prolongs the maintenance time and cannot be completed in time for continued use, resulting in low work efficiency and waste of manpower. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a photovoltaic micro-inverter chassis, which has the advantages of a simple chassis structure without affecting the sealing and safety, and is convenient for operators to disassemble and assemble the inverter when repairing it, and there is no need to manually disassemble the connecting wires, thereby improving safety. It solves the problem that the connection structure of the existing inverter chassis is connected by bolts and nuts when in use, which makes it inconvenient to disassemble it when repairing it, and before disassembling and repairing the inverter, the adapter wire needs to be manually removed before the internal part can be repaired, which prolongs the repair time and cannot be completed in time for continued use, resulting in low work efficiency and waste of manpower.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a photovoltaic micro-inverter chassis, comprising a chassis, a cover opening and closing assembly, a power-off maintenance mechanism, and a fixed clamping assembly, wherein a junction box is arranged on one side of the chassis, and a cover opening and closing assembly is arranged on the outer surfaces of both sides of the chassis, and the cover opening and closing assembly is fixedly connected to a box cover, and the cover opening and closing assembly comprises a cylinder, and the cylinder is fixedly installed on the outer surface of the chassis, and the cylinder is fixedly connected to a push rod through an output shaft, and the outer surface of the push rod is fixedly connected to a toothed plate, and surface teeth are arranged on both sides of the toothed plate, and a driving gear is installed above the toothed plate through surface teeth meshing, and the inner surface of the driving gear is fixed A first limit rod is installed, and the first limit rod is fixedly installed on the outer surface of the chassis. The power-off maintenance mechanism includes a driving gear, and the driving gear is installed under the tooth plate through surface tooth meshing. A transmission shaft is fixedly installed on the inner surface of the driving gear, and the transmission shaft is movably installed on the outer surface of the chassis. The fixed clamping assembly includes a fixed clamping plate, and the fixed clamping plate is fixedly installed on the lower surface of the chassis. Two slide grooves are fixedly installed on the other side of the lower surface of the chassis. Two tension springs are provided on the inner surface of the slide groove, and the other end of the tension spring is fixedly connected to a slider, and the slider is movably installed on the inner surface of the slide groove, and a clamping block is fixedly installed on the outer surface of the slider.

[0009] Preferably, a rotating rod is fixedly mounted on the inner surface of the driving gear, a first connecting rod is movably mounted on the inner surface of the other end of the rotating rod, and the first connecting rod is mounted on the outer surface of the box cover.

[0010] Preferably, two second connecting rods of different heights are fixedly installed on the middle outer surface of the chassis, and limiting plates are movably installed on the outer surfaces of the upper ends of the two second connecting rods. A third connecting rod is movably installed on the inner surfaces of the other ends of the two limiting plates. The third connecting rod movably installed on the upper limiting plate is arranged on the inner surface of the third connecting rod base, and the third connecting rod base is fixedly installed on the upper surface of the box cover, and the third connecting rod movably installed on the lower limiting plate is fixedly connected to the side of the box cover.

[0011] Preferably, an active bevel gear is fixedly mounted on the outer surface of the left end of the transmission shaft, and a linkage bevel gear is mounted on the active bevel gear through surface tooth meshing, a rotating shaft is fixedly mounted on the outer surface of the linkage bevel gear, and the rotating shaft is movably mounted on the inner surface of the rotating shaft base, and the rotating shaft base is fixedly mounted on the outer surface of the chassis.

[0012] Preferably, a driving sprocket is fixedly installed in the middle of the outer surface of the rotating shaft, and the driving sprocket is connected to the passive sprocket through a first chain transmission. Two notches are provided on both sides of the junction box to provide movement conditions for the first chain. A second limit rod is fixedly installed on the inner surface of the passive sprocket, and the second limit rod is movably installed on the inner surface of the junction box.

[0013] Preferably, a linkage sprocket is fixedly mounted on the outer surface of the front end of the second limiting rod, and the linkage sprocket is connected to the annular tooth plate through a second chain transmission. The annular tooth plate is arranged on the outer surface of the interface shell, and the interface shell is movably mounted on the inner surface of the junction box. The inner surface of the junction box is provided with a plurality of interface shells, and the outer surfaces of the interface shells on both sides that are transmission-connected to the linkage sprocket are provided with two annular tooth plates, and the outer surfaces of the plurality of interface shells in the middle are each provided with only one annular tooth plate.

[0014] Preferably, the annular toothed plates arranged on the outer walls of several of the interface sleeves are connected via a third chain transmission, the outer surfaces of the outer ends of several of the interface sleeves are provided with threaded fixing heads, and the interiors of several of the interface sleeves are provided with connecting heads, which are fixedly mounted on the inner surface of the junction box.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention provides a photovoltaic micro inverter chassis, which has the following beneficial effects:

[0017] 1. The photovoltaic micro-inverter chassis, through the matching between the cover opening and closing assembly and the power-off maintenance mechanism, achieves the effect of opening the cylinder when the micro-inverter is fixed on the surface of the bracket, the cylinder drives the ejector rod to push forward, the tooth plate drives the driving gear to rotate through the surface teeth, and the driving gear drives the box cover to rotate and move through the rotating rod fixedly installed on its outer surface when rotating. When the box cover moves, it is limited and supported by two limit plates. The two limit plates are set to one high and one low to avoid collision with each other during rotation. After the box cover is opened, it is convenient for operators to check the internal structure. Maintenance, and can detect whether the indicator lights corresponding to each connector are on when the connecting line is not connected. After confirmation, turn on the cylinder again to drive the push rod to recover, and close the box cover tightly on the upper surface of the chassis. A sealing strip is provided at the joint between the inner surface of the box cover and the chassis to ensure the sealing between the box cover and the chassis and the integrity when the cover is tightened, to prevent the entry of rain and dust, and the simple structure enhances the heat dissipation. The chassis is usually made of high-strength, wear-resistant and corrosion-resistant aluminum alloy. The thermal conductivity of aluminum alloy is also very good, which makes the overall heat dissipation performance better and does not require multiple heat dissipation structures for normal use, saving costs.

[0018] 2. The photovoltaic micro-inverter chassis, through the cooperation between the cover opening and closing assembly and the power-off maintenance mechanism, achieves that when the operator inspects the chassis, he only needs to drive the ejector rod to be ejected again by the cylinder, and the driving gear drives the chassis cover to open and drives the active gear to rotate through the tooth plate at the same time. When the active gear rotates, it drives the active bevel gear to drive the linkage bevel gear to rotate through the surface teeth. The rotating shaft drives the active sprocket on its outer surface to rotate synchronously through the rotation of the linkage bevel gear, and drives the passive sprocket to rotate through the first chain at the same time. The passive sprocket drives the linkage sprocket to rotate through the second limit rod, and the linkage sprocket is connected to the annular tooth plate through the second chain to achieve the effect of rotating the interface shells on both sides, and the interface shells on both sides are all connected together through the third chain so that the interface shells can rotate together, and the adapter of the connecting line and the connector are connected together. The friction force limits the sleeve, so that when the interface sleeve rotates, the adapter sleeve of the connecting wire moves outward, causing the adapter to fall off and the connecting head to automatically disconnect the connecting wire from the photovoltaic micro-inverter. However, some parts of the adapter sleeve and the threaded fixing head are still connected, so that when the operator inspects the inside of the photovoltaic micro-inverter and handles the fault, there is no need to manually open the cover and disconnect the connection of the connecting wire to stop the inverter, which saves time and manpower and prevents aging of the connecting wire to protect the staff. It provides safety for this. After the connection is disconnected and the inside of the deformer is inspected and repaired, it is only necessary to drive the cylinder to drive the ejector rod to eject the connecting wire so that the connecting wire can be automatically connected and the box cover can be closed to continue working. This micro-inverter chassis only needs to manually connect the connecting wire to the threaded fixing head when it is used for the first time or the inverter is replaced. After that, during maintenance, it is only necessary to control the extension and retraction of the ejector rod to control the connection and disconnection of the connecting wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall front view structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall bottom-up structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the junction box of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the cover opening and closing assembly of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the power-off maintenance mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the fixed clamping assembly of the present invention.

[0025] The numbers in the figure are:

[0026] 1. Chassis; 11. Junction box; 12. Box cover;

[0027] 2. Cover opening and closing assembly; 21. Cylinder; 22. Push rod; 23. Tooth plate; 24. First limit rod; 25. Driving gear; 26. Rotating rod; 27. First connecting rod; 28. Second connecting rod; 29. ​​Limiting plate; 210. Third connecting rod; 211. Third connecting rod base;

[0028] 3. Power-off maintenance mechanism; 31. Driving gear; 32. Transmission shaft; 33. Driving bevel gear; 34. Linkage bevel gear; 35. Rotating shaft; 36. Rotating shaft base; 37. Driving sprocket; 38. First chain; 39. Passive sprocket; 310. Second limit rod; 311. Linkage sprocket; 312. Second chain; 313. Interface housing; 314. Annular tooth plate; 315. Third chain; 316. Threaded fixing head; 317. Connecting head;

[0029] 4. Fixed clamping assembly; 41. Fixed clamping plate; 42. Slide groove; 43. Tension spring; 44. Sliding block; 45. Clamping block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1 of the present invention

[0032] See also Figure 1-5A photovoltaic micro-inverter chassis comprises a chassis 1, a cover opening and closing assembly 2, a power-off maintenance mechanism 3, and a fixed clamping assembly 4. A junction box 11 is arranged on one side of the chassis 1, and a cover opening and closing assembly 2 is arranged on the outer surfaces of both sides of the chassis 1. The cover opening and closing assembly 2 is fixedly connected with a box cover 12. The fixed clamping assembly 4 comprises a fixed clamping plate 41, and the fixed clamping plate 41 is fixedly installed on the lower surface of the chassis 1. Two slide grooves 42 are fixedly installed on the other side of the lower surface of the chassis 1. Two tension springs 43 are arranged on the inner surface of the slide groove 42. The other end of the tension spring 43 is fixedly connected with a slider 44. The slider 44 is movably installed on the inner surface of the slide groove 42. A clamping block 45 is fixedly installed on the outer surface of the slider 44. The cover opening and closing assembly 2 comprises a cylinder 21, and the cylinder 21 is fixedly installed on the outer surface of the chassis 1. The cylinder 21 is fixedly connected with a push rod 22 through an output shaft. The outer surface of the push rod 22 is fixedly connected with a tooth plate 23. Both sides of the tooth plate 23 are provided with surface teeth. A driving gear 25 is installed above 23 through surface tooth meshing, and a first limiting rod 24 is fixedly installed on the inner surface of the driving gear 25, and the first limiting rod 24 is fixedly installed on the outer surface of the chassis 1; a rotating rod 26 is fixedly installed on the inner surface of the driving gear 25, and a first connecting rod 27 is movably installed on the inner surface of the other end of the rotating rod 26, and the first connecting rod 27 is installed on the outer surface of the box cover 12; two second connecting rods 28 of different heights are fixedly installed on the middle outer surface of the chassis 1, and limiting plates 29 are movably installed on the outer surfaces of the upper ends of the two second connecting rods 28, and third connecting rods 210 are movably installed on the inner surfaces of the other ends of the two limiting plates 29, and the third connecting rod 210 movably installed on the upper limiting plate 29 is arranged on the inner surface of the third connecting rod base 211, and the third connecting rod base 211 is fixedly installed on the upper surface of the box cover 12, and the third connecting rod 210 movably installed on the lower limiting plate 29 is fixedly connected to the side of the box cover 12.

[0033] Embodiment 1 of the present invention

[0034] See also Figure 1 , Figure 5 , Figure 6The power-off maintenance mechanism 3 includes a driving gear 31, which is installed below the tooth plate 23 through surface tooth meshing. A transmission shaft 32 is fixedly installed on the inner surface of the driving gear 31, and the transmission shaft 32 is movably installed on the outer surface of the chassis 1. A driving bevel gear 33 is fixedly installed on the outer surface of the left end of the transmission shaft 32. A linkage bevel gear 34 is installed on the driving bevel gear 33 through surface tooth meshing. A rotating shaft 35 is fixedly installed on the outer surface of the linkage bevel gear 34. The rotating shaft 35 is movably installed on the inner surface of the rotating shaft base 36. The rotating shaft base 36 is fixedly installed on the outer surface of the chassis 1. A driving sprocket 37 is fixedly installed in the middle of the outer surface of the rotating shaft 35. The driving sprocket 37 is connected to the passive sprocket 39 through the first chain 38. Two notches are provided on both sides of the junction box 11 to provide movement conditions for the first chain 38. A second limiting rod 310 is fixedly installed on the inner surface of the passive sprocket 39, and the second limiting rod 310 is movably installed on the junction box 11. The inner surface of the junction box 11 and the outer surface of the front end of the second limiting rod 310 are fixedly installed with a linkage sprocket 311, and the linkage sprocket 311 is connected to the annular tooth plate 314 through the second chain 312. The annular tooth plate 314 is arranged on the outer surface of the interface shell 313, and the interface shell 313 is movably installed on the inner surface of the junction box 11. A plurality of interface shells 313 are arranged on the inner surface of the junction box 11, and two annular tooth plates 314 are arranged on the outer surfaces of the interface shells 313 connected to the linkage sprocket 311 on both sides, and only one annular tooth plate 314 is arranged on the outer surfaces of the middle plurality of interface shells 313. The annular tooth plates 314 arranged on the outer walls of the plurality of interface shells 313 are connected through the third chain 315. Threaded fixing heads 316 are arranged on the outer surfaces of the outer ends of the plurality of interface shells 313, and connectors 317 are arranged inside the plurality of interface shells 313, and the connectors 317 are fixedly installed on the inner surface of the junction box 11.

[0035] The complete use steps and working principles of the above-mentioned embodiments 1 to 4 are as follows:

[0036] First, the staff takes the micro inverter to the mounting bracket, clamps the mounting bracket with the clamp block 45 on the lower surface of the chassis 1 and pulls it backwards. The elasticity of the tension spring 43 allows the clamp block 45 to move in the slide groove 42 when it is pulled backwards. When the fixed clamp plate 41 can fit the bracket, the tension is released. At this moment, the elasticity of the tension spring 43 provides a supporting force to the slider 44 so that the clamp block 45 and the fixed clamp plate 41 clamp the micro inverter on the bracket surface. When the micro inverter is fixed on the bracket surface, the cylinder 21 is turned on, and the cylinder 21 drives the push rod 22 to push forward. The tooth plate 23 drives the driving gear 25 to rotate through the surface teeth. When the driving gear 25 rotates, it drives the box cover 12 to rotate and move through the rotating rod fixed on its outer surface. When the box cover 12 moves, the two A limit plate 29 is used to limit its movement and support it. The two limit plates 29 are set to be one high and one low to avoid collision with each other during rotation. After the box cover 12 is opened, it is convenient for the operator to inspect the internal structure, and when the connecting line is not connected, it can detect whether the indicator lights corresponding to each connector 317 are in the on state. After confirmation, the cylinder 21 is turned on again to drive the push rod to recover, and the box cover 12 is tightly closed on the upper surface of the chassis 1. A sealing strip is provided at the joint between the inner surface of the box cover 12 and the chassis 1 to ensure the sealing of the box cover 12 and the chassis and the integrity when the cover is tightened, to prevent rain and dust from entering, finally, the connecting line is inserted into the interface sleeve 313 and the connecting line is rotated so that the adapter sleeve is fully engaged through the thread into the threaded fixing head 316, so that the adapter of the connecting line is firmly connected to the connector 317.

[0037] Secondly, when the photovoltaic micro-inverter is damaged or fails, the staff can repair it. They only need to drive the cylinder 21 to drive the ejector rod 22 to eject it again. The driving gear 25 drives the box cover 12 to open and drives the active gear 31 to rotate through the toothed plate 23. When the active gear 31 rotates, it drives the active bevel gear 33 to drive the linkage bevel gear 34 to rotate through the surface teeth. The rotating shaft 35 drives the active sprocket 37 on its outer surface to rotate synchronously through the rotation of the linkage bevel gear 34, and drives the passive sprocket 39 to rotate through the first chain 28. The passive sprocket 39 drives the linkage sprocket 311 to rotate through the second limiting rod 310. The linkage sprocket 311 is connected to the annular toothed plate 314 through the second chain 312, so as to achieve the effect of rotating the interface shells 313 on both sides, and the interface shells 313 on both sides are all connected together through the third chain 315, so that the interface shells 313 can rotate together. The friction between the adapter of the connecting wire and the connector 317 limits the housing, so that when the interface housing 313 rotates, the adapter housing of the connecting wire moves outward, so that the adapter falls off the connector 317 and automatically disconnects the connecting wire from the photovoltaic micro-inverter. However, there is still some connection between the adapter housing and the threaded fixing head 316, so that when the operator inspects and handles the internal faults of the photovoltaic micro-inverter, there is no need to manually open the cover and disconnect the connection of the connecting wire to stop the inverter, which saves time and manpower and protects the staff at the same time. It provides safety. After the connection is disconnected and the internal inspection of the deformer is completed, it is only necessary to drive the cylinder 21 to drive the ejector rod 22 to eject so that the connecting wire can be automatically connected and the box cover can be closed to continue working. This micro-inverter chassis only needs to manually connect the connecting wire to the threaded fixing head when it is used for the first time or when the inverter is replaced. After that, it is only necessary to control the extension and retraction of the ejector rod to control the connection and disconnection of the connecting wire during inspection.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic micro-inverter chassis, comprising a chassis (1), a cover opening and closing assembly (2), a power-off maintenance mechanism (3), and a fixing clamping assembly (4), characterized in that: A junction box (11) is provided on one side of the chassis (1), and a cover opening and closing assembly (2) is provided on the outer surfaces of both sides of the chassis (1), and the cover opening and closing assembly (2) is fixedly connected to a box cover (12); The cover opening and closing assembly (2) comprises a cylinder (21), the cylinder (21) is fixedly mounted on the outer surface of the chassis (1), the cylinder (21) is fixedly connected to a push rod (22) via an output shaft, the outer surface of the push rod (22) is fixedly connected to a toothed plate (23), the upper and lower sides of the toothed plate (23) are provided with surface teeth, a driving gear (25) is mounted above the toothed plate (23) through surface teeth meshing, a first limiting rod (24) is fixedly mounted on the inner surface of the driving gear (25), and the first limiting rod (24) is fixedly mounted on the outer surface of the chassis (1); The power-off maintenance mechanism (3) comprises a driving gear (31), the driving gear (31) is mounted below the toothed plate (23) through surface engagement, a transmission shaft (32) is fixedly mounted on the inner surface of the driving gear (31), and the transmission shaft (32) is movably mounted on the outer surface of the chassis (1); The fixed clamping assembly (4) comprises a fixed clamping plate (41), wherein the fixed clamping plate (41) is fixedly mounted on the lower surface of the chassis (1), and two slide grooves (42) are fixedly mounted on the other side of the lower surface of the chassis (1), and two tension springs (43) are arranged on the inner surface of the slide groove (42), and the other end of the tension spring (43) is fixedly connected to a slider (44), and the slider (44) is movably mounted on the inner surface of the slide groove (42), and a clamping block (45) is fixedly mounted on the outer surface of the slider (44).

2. A photovoltaic micro-inverter chassis according to claim 1, characterized in that: A rotating rod (26) is fixedly mounted on the inner surface of the driving gear (25), and a first connecting rod (27) is movably mounted on the inner surface of the other end of the rotating rod (26). The first connecting rod (27) is mechanically mounted on the outer surface of the box cover (12).

3. A photovoltaic micro-inverter chassis according to claim 2, characterized in that: Two second connecting rods (28) of different heights are fixedly mounted on the middle outer surface of the chassis (1); a limit plate (29) is movably mounted on the outer surfaces of the upper ends of the two second connecting rods (28); a third connecting rod (210) is movably mounted on the inner surfaces of the other ends of the two limit plates (29); the third connecting rod (210) movably mounted on the upper limit plate (29) is arranged on the inner surface of a third connecting rod base (211); the third connecting rod base (211) is fixedly mounted on the upper surface of the box cover (12); and the third connecting rod (210) movably mounted on the lower limit plate (29) is fixedly connected to the side of the box cover (12).

4. A photovoltaic micro-inverter chassis according to claim 1, characterized in that: An active bevel gear (33) is fixedly mounted on the outer surface of the left end of the transmission shaft (32); a linkage bevel gear (34) is mounted on the active bevel gear (33) through surface tooth meshing; a rotating shaft (35) is fixedly mounted on the outer surface of the linkage bevel gear (34); the rotating shaft (35) is movably mounted on the inner surface of a rotating shaft base (36); and the rotating shaft base (36) is fixedly mounted on the outer surface of the chassis (1).

5. A photovoltaic micro-inverter chassis according to claim 4, characterized in that: A driving sprocket (37) is fixedly mounted in the middle of the outer surface of the rotating shaft (35); the driving sprocket (37) is connected to the passive sprocket (39) through a first chain (38); two notches are provided on both sides of the junction box (11) to provide movement conditions for the first chain (38); a second limiting rod (310) is fixedly mounted on the inner surface of the passive sprocket (39); and the second limiting rod (310) is movably mounted on the inner surface of the junction box (11).

6. A photovoltaic micro-inverter chassis according to claim 5, characterized in that: A linkage sprocket (311) is fixedly mounted on the outer surface of the front end of the second limiting rod (310); the linkage sprocket (311) is transmission-connected to an annular tooth plate (314) via a second chain (312); the annular tooth plate (314) is arranged on the outer surface of an interface casing (313); the interface casing (313) is movably mounted on the inner surface of a junction box (11); a plurality of interface casings (313) are arranged on the inner surface of the junction box (11); two annular tooth plates (314) are arranged on the outer surfaces of the interface casings (313) transmission-connected to the linkage sprocket (311) on both sides; and only one annular tooth plate (314) is arranged on the outer surfaces of the plurality of interface casings (313) in the middle.

7. A photovoltaic micro-inverter chassis according to claim 6, characterized in that: Annular toothed plates (314) arranged on the outer walls of the plurality of interface casings (313) are connected in transmission via a third chain (315); threaded fixing heads (316) are arranged on the outer surfaces of the outer ends of the plurality of interface casings (313); connecting heads (317) are arranged inside the plurality of interface casings (313); and the connecting heads (317) are fixedly mounted on the inner surface of the junction box (11).

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