Multi-layer flat plate folding and unfolding mechanism

Abstract

The present invention discloses a multi-layer flat folding and unfolding mechanism, which belongs to the technical field of photovoltaic panels, and comprises: a base, on which at least four groups of photovoltaic panel bodies are installed; a steering unit, which is rotatably connected to the base; a folding unit, which is arranged on the base and connected to the steering unit; a light sensing unit, which is slidably connected to the base and connected to the steering unit; an opening and closing unit, which is rotatably connected to the steering unit; and a positioning unit, which is arranged on the opening and closing unit. By rotating the three groups of photovoltaic panel bodies, the four groups of photovoltaic panel bodies can be spread out respectively, and the four groups of photovoltaic panel bodies can be positioned respectively by the opening and closing unit under the action of the positioning unit, thereby improving the stability of the four groups of photovoltaic panel bodies after being spread out. In extreme weather such as rain or snow or at night, with the cooperation of the steering unit and the folding unit, the folding unit will drive the photovoltaic panel body to fold upward to completely overlap with the cooperation of the steering unit, thereby improving the protective performance of the photovoltaic panel body in extreme weather such as rain or snow.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic panels, and in particular to a multi-layer flat plate folding and unfolding mechanism. Background Art

[0002] A Chinese patent (authorization announcement number: CN221081246U) discloses a photovoltaic panel folding device. It includes a support frame, a first photovoltaic panel and a second photovoltaic panel are installed inside the support frame, and an adjustment structure, the adjustment structure is located on the support frame, and the adjustment structure includes two slide grooves, and slide grooves are provided on both sides of the support frame. Two fixedly connected sliding rods are installed on both sides of the first photovoltaic panel and the second photovoltaic panel away from each other. The arc surface of the sliding rod is slidably connected to the slide groove, and the first photovoltaic panel and the second photovoltaic panel are rotatably connected to the end close to each other. This photovoltaic panel folding device has the advantages of lifting the connecting plate upwards to fold the first photovoltaic panel and the second photovoltaic panel upwards. During the process, the cleaning pad is always close to the photovoltaic panel and cleans the surface of the photovoltaic panel, which is beneficial to the long-term operation of the photovoltaic panel and has the advantages of simple and convenient operation.

[0003] The photovoltaic panel folding device in the above technical solution also has the following defects when in use: it cannot be automatically unfolded according to light, and cannot be automatically folded and retracted in extreme weather such as rain and snow, so it is easy to be damaged under the pressure of rain and snow. Therefore, it is necessary to provide a multi-layer flat plate folding and unfolding mechanism to solve the above problems. Summary of the invention

[0004] In view of the shortcomings of the prior art, an object of the embodiments of the present invention is to provide a multi-layer flat plate folding and unfolding mechanism to solve the problems in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A multi-layer flat plate folding and unfolding mechanism, comprising:

[0007] A base, on which at least four groups of photovoltaic panel bodies are installed;

[0008] A steering unit is rotatably connected to the base and connected to the photovoltaic panel body, and is used to drive the photovoltaic panel body to steer;

[0009] A folding unit is provided on the base and connected to the steering unit, and is used to cooperate with the steering unit to realize the folding and unfolding of the photovoltaic panel body;

[0010] The light sensing unit is slidably connected to the base and connected to the steering unit, and is used to drive the steering unit to turn on the base;

[0011] The opening and closing unit is rotatably connected to the steering unit and connected to the photovoltaic panel body, and is used to drive the multiple photovoltaic panel bodies to be folded or unfolded;

[0012] The positioning unit is arranged on the opening and closing unit and is used for positioning the opening and closing unit.

[0013] As a preferred technical solution of the present invention, the steering unit includes: a rotating shaft, rotatably connected to the base, and a rotating frame is installed on the surface; a rotating rod, rotatably connected to the end of the rotating frame, and two groups of support plates are rotatably connected to the rotating rod, and at least four groups of photovoltaic panel bodies are respectively installed on each group of support plates; a rotating frame, rotatably connected to the surface of the rotating rod, and two groups of rotating frames are installed, and the two groups of rotating frames are respectively connected to the two groups of support plates.

[0014] As a preferred technical solution of the present invention, the folding unit includes: a slide groove, which is opened on the rotating frame and is slidably connected to a slider inside; a sliding member, which is slidably connected to the side of the rotating frame, the side is connected to the slider, and the sliding member is hinged to the rotating frame through two groups of arc rods; an arc groove, which is opened on the base; a sliding column, which is connected to the slider and has a surface that is slidably connected to the arc groove.

[0015] As a preferred technical solution of the present invention, the center of the circle where the rotating shaft and the arc groove are located is eccentrically arranged.

[0016] As a preferred technical solution of the present invention, the photosensitive unit includes: a groove, which is opened on the base and is slidably connected to a sliding frame inside, and the side of the sliding frame and the inner wall of the groove are connected by an elastic member; a tilting frame, which is connected to the end of the rotating frame close to the rotating shaft and is hinged to the side of the sliding frame through a connecting rod; a photosensitive frame, which is fixed to the side of the base and is slidably connected to a moving part inside, and the side of the moving part is connected to a push rod; an inclined groove, which is opened on the side of the sliding frame, and the surface is slidably connected to the end of the push rod; an elastic airbag, which is installed in the photosensitive frame and connected to the side of the moving part.

[0017] As a preferred technical solution of the present invention, the opening and closing unit includes: a turntable fixed on the top corner of the photovoltaic panel body; a circular hole opened in the center of the turntable; a support rod fixed on the support plate and rotatably connected in the circular hole.

[0018] As a preferred technical solution of the present invention, the positioning unit includes: a first groove, which is opened on the turntable and connected to the circular hole; a semicircular groove, which is opened on the turntable, and the circular hole is located at the center of the circle where the semicircular groove is located; a second groove, which is opened on the turntable and connected to the end of the semicircular groove; a positioning column, which is fixed on the turntable and is slidably connected to the semicircular groove and the second groove on the surface.

[0019] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the present invention can make four groups of photovoltaic panel bodies spread out separately by rotating three groups of photovoltaic panel bodies, and can position the four groups of photovoltaic panel bodies separately through the opening and closing units under the action of the positioning unit, thereby improving the stability of the four groups of photovoltaic panel bodies after being spread out. When there is light, under the action of the light sensing unit, the steering unit can be rotated from a horizontal state to a vertical state, and at the same time, the folding unit will drive the photovoltaic panel body to unfold downward with the cooperation of the steering unit until the photovoltaic panel body is spread out to a horizontal state, so that the photovoltaic panel body can fully receive light.

[0020] Compared with the prior art, the embodiments of the present invention cannot be automatically folded and folded, and thus are easily damaged under the pressure of rain and snow. By setting a light sensing unit, in extreme weather of rain and snow or at night, under the action of the light sensing unit, and with the cooperation of the steering unit and the folding unit, the steering unit will rotate to a horizontal state, and the folding unit will drive the photovoltaic panel body to fold upward to completely overlap with the cooperation of the steering unit, thereby improving the protection performance of the photovoltaic panel body in extreme weather of rain and snow.

[0021] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure of a multi-layer flat plate folding and unfolding mechanism provided in an embodiment of the present invention.

[0023] Figure 2 It is a schematic structural diagram of a base provided in an embodiment of the present invention.

[0024] Figure 3 for Figure 2 A partial enlarged view of part A.

[0025] Figure 4 for Figure 1 A partial enlarged view of part C.

[0026] Figure 5 for Figure 1 A partial enlarged view of part B.

[0027] 1. Base; 11. Photovoltaic panel body; 2. Steering unit; 21. Rotating shaft; 22. Rotating frame; 23. Rotating rod; 24. Rotating frame; 25. Support plate; 3. Folding unit; 31. Slide groove; 32. Sliding block; 321. Sliding column; 33. Sliding member; 34. Arc rod; 35. Arc groove; 4. Light sensing unit; 41. Groove; 42. Sliding frame; 421. Oblique groove; 43. Elastic member; 44. Tilting frame; 45. Connecting rod; 46. Light sensing frame; 47. Elastic airbag; 48. Moving member; 481. Top rod; 5. Opening and closing unit; 51. Turntable; 52. Round hole; 53. Support rod; 6. Positioning unit; 61. First groove; 62. Semicircular groove; 63. Second groove; 64. Positioning column. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0030] See also Figure 1 to Figure 5 , a multi-layer flat plate folding and unfolding mechanism, comprising:

[0031] A base 1, on which at least four groups of photovoltaic panel bodies 11 are installed;

[0032] The steering unit 2 is rotatably connected to the base 1 and connected to the photovoltaic panel body 11, and is used to drive the photovoltaic panel body 11 to turn;

[0033] The folding unit 3 is provided on the base 1 and connected to the steering unit 2, and is used to cooperate with the steering unit 2 to realize the folding and unfolding of the photovoltaic panel body 11;

[0034] The light sensing unit 4 is slidably connected to the base 1 and connected to the steering unit 2, and is used to drive the steering unit 2 to turn on the base 1;

[0035] The opening and closing unit 5 is rotatably connected to the steering unit 2 and connected to the photovoltaic panel body 11, and is used to drive the multiple photovoltaic panel bodies 11 to be folded or unfolded;

[0036] The positioning unit 6 is provided on the opening and closing unit 5 and is used for positioning the opening and closing unit 5 .

[0037] In an embodiment of the present invention, by rotating three groups of photovoltaic panel bodies 11, four groups of photovoltaic panel bodies 11 can be spread out respectively, and under the action of the positioning unit 6, the four groups of photovoltaic panel bodies 11 can be positioned respectively through the opening and closing unit 5, thereby improving the stability of the four groups of photovoltaic panel bodies 11 after being spread out.

[0038] When there is light, under the action of the light sensing unit 4, the steering unit 2 can be rotated from a horizontal state to a vertical state, and at the same time, the folding unit 3 will drive the photovoltaic panel body 11 to unfold downward with the cooperation of the steering unit 2, until the photovoltaic panel body 11 is spread to a horizontal state, so that the photovoltaic panel body 11 can fully receive light. In extreme weather such as rain or snow or at night, under the action of the light sensing unit 4, the steering unit 2 will rotate to a horizontal state, and at the same time, the folding unit 3 will drive the photovoltaic panel body 11 to fold upward to completely overlap with the cooperation of the steering unit 2, thereby improving the protection performance of the photovoltaic panel body 11 in extreme weather such as rain or snow.

[0039] In one embodiment of the present invention, Figure 3 and Figure 4 As shown, the steering unit 2 includes:

[0040] A rotating shaft 21 is rotatably connected to the base 1, and a rotating frame 22 is mounted on the surface;

[0041] A rotating rod 23 is rotatably connected to the end of the rotating frame 22, and two groups of support plates 25 are rotatably connected to the rotating rod 23, and at least four groups of photovoltaic panel bodies 11 are respectively installed on each group of support plates 25;

[0042] The rotating frame 24 is rotatably connected to the surface of the rotating rod 23 . Two groups of rotating frames 24 are installed, and the two groups of rotating frames 24 are respectively connected to the two groups of support plates 25 .

[0043] In this embodiment, when the photovoltaic panel body 11 is in operation, when the illumination angle of the photovoltaic panel body 11 needs to be adjusted, the rotating shaft 21 is rotated, and the rotating shaft 21 can drive the rotating rod 23 at its end to rotate synchronously through the rotating frame 22, and the rotating rod 23 can drive the photovoltaic panel body 11 to turn synchronously through the rotating frame 24 and the support plate 25, so that the illumination angle of the photovoltaic panel body 11 can be adjusted, so that the photovoltaic panel body 11 can fully receive light.

[0044] The end of the rotating shaft 21 can be connected to the output end of the motor that drives it to rotate, so as to drive the rotating shaft 21 to rotate stably.

[0045] In one embodiment of the present invention, Figure 3 and Figure 4 As shown, the folding unit 3 includes:

[0046] A slide groove 31 is provided on the rotating frame 22 and a slider 32 is slidably connected therein;

[0047] A sliding member 33 is slidably connected to the side of the rotating frame 22, and the side is connected to the sliding member 32. The sliding member 33 is hinged on the rotating frame 24 through two sets of arc rods 34;

[0048] An arc groove 35 is provided on the base 1;

[0049] The sliding column 321 is connected to the sliding block 32 , and its surface is slidably connected in the arc groove 35 .

[0050] In this embodiment, the rotating frame 22 can drive the slider 32 in the slide groove 31 to turn synchronously during the turning process, and then the slider 32 can drive the sliding column 321 to rotate. Since the end of the sliding column 321 is slidingly connected in the arc groove 35, the slider 32 can drive the sliding column 321 to slide in the arc groove 35.

[0051] Because the center of the circle where the rotating shaft 21 and the arc groove 35 are located is eccentrically arranged, and as Figure 1 As shown, the rotating shaft 21 is located above the center of the circle where the arc groove 35 is located. Therefore, when the rotating frame 22 rotates counterclockwise, the sliding column 321 will also slide counterclockwise in the arc groove 35, and the slider 32 can slide upward (away from the rotating shaft 21) in the slide groove 31 under the action of the arc groove 35 and the sliding column 321, and then the slider 32 can drive the sliding member 33 to slide upward on the side of the rotating frame 22, so the sliding member 33 can drive the two groups of rotating frames 24 to rotate upward through the two groups of arc rods 34, so that the two groups of rotating frames 24 move upward, and at the same time, the two groups of rotating frames 24 can drive the corresponding photovoltaic panel body 11 to fold upward through the two groups of support plates 25.

[0052] In the above process, when the rotating frame 22 rotates counterclockwise, the two sets of support plates 25 will not only drive the two sets of photovoltaic panel bodies 11 to turn counterclockwise, but also drive the photovoltaic panel bodies 11 to fold upward. When the rotating frame 22 rotates 90 degrees counterclockwise, that is, rotates to the horizontal direction, the two sets of photovoltaic panel bodies 11 will be folded to overlap, which is convenient for storing the photovoltaic panel bodies 11.

[0053] In one embodiment of the present invention, Figure 3 As shown, the light sensing unit 4 includes:

[0054] The groove 41 is provided on the base 1, and a sliding frame 42 is slidably connected therein. The side surface of the sliding frame 42 and the inner wall of the groove 41 are connected via an elastic member 43;

[0055] The tilt frame 44 is connected to the end of the rotating frame 22 close to the rotating shaft 21 and is hinged to the side of the sliding frame 42 through a connecting rod 45;

[0056] The light sensing frame 46 is fixed to the side of the base 1, and a moving member 48 is slidably connected inside, and a top rod 481 is connected to the side of the moving member 48;

[0057] The inclined groove 421 is provided on the side of the sliding frame 42, and the surface is slidably connected to the end of the push rod 481;

[0058] The elastic air bag 47 is installed in the light sensing frame 46 and is connected to the side of the moving part 48 .

[0059] In this embodiment, when there is light, the temperature of the light sensing frame 46 will rise under the action of light, and the elastic airbag 47 in the light sensing frame 46 will expand due to the heat, so that the elastic airbag 47 will push the moving part 48 to slide to the right in the light sensing frame 46, and then the moving part 48 will drive the top rod 481 to slide to the right, and the end of the top rod 481 can push the sliding frame 42 to slide to the right in the groove 41 through the connection with the inclined groove 421, and the sliding frame 42 can compress the elastic part 43.

[0060] When the sliding frame 42 slides to the right, the rotating frame 22 can drive the rotating shaft 21 to rotate clockwise on the base 1 through the connection of the connecting rod 45 and the tilting frame 44, so that the rotating frame 22 can rotate clockwise from a horizontal state to a vertical state ( Figure 3 status).

[0061] When the rotating frame 22 rotates clockwise from the horizontal state to the vertical state, the sliding column 321 will also slide clockwise in the arc groove 35. Similarly, because the center of the circle where the rotating shaft 21 and the arc groove 35 are located is eccentrically arranged, the sliding block 32 can slide downward in the sliding groove 31 under the action of the arc groove 35 and the sliding column 321, and then the sliding block 32 can drive the sliding member 33 to slide downward on the side of the rotating frame 22. The sliding member 33 can drive the two groups of rotating frames 24 to unfold downward through the two groups of arc rods 34 respectively, so the two groups of rotating frames 24 can drive the corresponding photovoltaic panel bodies 11 to unfold downward through the two groups of support plates 25 respectively. When the rotating frame 22 rotates to the vertical state, the two groups of support plates 25 drive the photovoltaic panel bodies 11 to spread out to the horizontal state (such as Figure 1 state), so that the photovoltaic panel body 11 can fully receive light.

[0062] In extreme weather such as rain or snow or at night, when the temperature drops, the elastic airbag 47 will cool and shrink, so that the elastic airbag 47 will pull the moving part 48 to slide to the left in the light sensing frame 46. At the same time, the sliding frame 42 will slide to the left in the groove 41 under the elastic force of the elastic part 43, so that the rotating frame 22 rotates counterclockwise. Contrary to the above working process, the two groups of photovoltaic panel bodies 11 will be folded to completely overlap, thereby improving the protection performance of the photovoltaic panel body 11 in extreme weather such as rain or snow.

[0063] The elastic member 43 may be a spring or elastic rubber to facilitate pushing the sliding frame 42 to slide stably in the groove 41 , and is not limited here.

[0064] In one embodiment of the present invention, Figure 5 As shown, the opening and closing unit 5 includes:

[0065] The rotating disk 51 is fixed on the top corner of the photovoltaic panel body 11;

[0066] A circular hole 52 is provided at the center of the rotating disk 51;

[0067] The support rod 53 is fixed on the support plate 25 and is rotatably connected in the circular hole 52.

[0068] In this embodiment, if Figure 2 As shown, four groups of photovoltaic panel bodies 11 are installed on each group of support plates 25. When the four groups of photovoltaic panel bodies 11 need to be folded and folded, the three groups of photovoltaic panel bodies 11 away from the upper side of the support plates 25 are rotated respectively, so that the three groups of photovoltaic panel bodies 11 can respectively drive the corresponding turntables 51 to rotate on the support rods 53, so that the turntables 51 drive the round holes 52 to rotate on the surface of the support rods 53 until the four groups of photovoltaic panel bodies 11 rotate to overlap and are all located above the support plates 25. The four groups of photovoltaic panel bodies 11 can be rotated to overlap by the opening and closing unit 5, which reduces the space occupied by the photovoltaic panel bodies 11 and facilitates the transportation and storage of the photovoltaic panel bodies 11.

[0069] When the photovoltaic panel bodies 11 are used, the three groups of photovoltaic panel bodies 11 are rotated respectively until the four groups of photovoltaic panel bodies 11 are unfolded respectively (such as Figure 1 status).

[0070] In one embodiment of the present invention, Figure 5 As shown, the positioning unit 6 includes:

[0071] The first groove 61 is formed on the rotating disk 51 and communicates with the circular hole 52;

[0072] A semicircular groove 62 is provided on the rotating disk 51, and the circular hole 52 is located at the center of the circle where the semicircular groove 62 is located;

[0073] The second groove 63 is formed on the rotating disk 51 and communicates with the end of the semicircular groove 62;

[0074] The positioning post 64 is fixed on the rotating disk 51 , and its surface is slidably connected in the semicircular groove 62 and the second groove 63 .

[0075] In the present embodiment, during the process of unfolding the three groups of photovoltaic panel bodies 11 respectively, the turntable 51 will drive the circular hole 52 to rotate on the surface of the support rod 53, and at the same time, the turntable 51 can drive the semicircular groove 62 to slide on the surface of the positioning column 64 until the positioning column 64 slides to the end of the semicircular groove 62 close to the second groove 63. At this time, the photovoltaic panel body 11 is pulled along the direction of the first groove 61, so that the support rod 53 and the positioning column 64 slide in the first groove 61 and the second groove 63 respectively, until the support rod 53 and the positioning column 64 slide to the end of the first groove 61 away from the circular hole 52 and the end of the second groove 63 away from the semicircular groove 62, so that the turntable 51 can be positioned under the action of the support rod 53 and the positioning column 64 and the ends of the first groove 61 and the second groove 63 respectively, and then the photovoltaic panel body 11 can be positioned, thereby improving the stability of the photovoltaic panel body 11.

[0076] When the three groups of photovoltaic panel bodies 11 are folded and collected, the photovoltaic panel bodies 11 can be rotated and folded by simply pulling the photovoltaic panel bodies 11 in the opposite direction so that the support rods 53 and the positioning columns 64 slide to the ends of the circular holes 52 and the second grooves 63 close to the semicircular grooves 62 respectively.

[0077] The working principle of the present invention is: when there is light, under the action of the light sensing unit 4, the sliding frame 42 can be connected with the connecting rod 45 and the tilting frame 44 to enable the rotating frame 22 to drive the rotating shaft 21 to rotate clockwise on the base 1, so that the rotating frame 22 can rotate clockwise from a horizontal state to a vertical state.

[0078] During the process of the rotating frame 22 rotating clockwise from the horizontal state to the vertical state, the sliding column 321 will also slide clockwise in the arc groove 35, and the slider 32 can slide downward in the slide groove 31 under the action of the arc groove 35 and the sliding column 321, and then the slider 32 can drive the sliding member 33 to slide downward on the side of the rotating frame 22, and the sliding member 33 can drive the two groups of rotating frames 24 to unfold downward through the two groups of arc rods 34 respectively, so the two groups of rotating frames 24 can drive the corresponding photovoltaic panel bodies 11 to unfold downward through the two groups of support plates 25 respectively, and when the rotating frame 22 rotates to the vertical state, the two groups of support plates 25 drive the photovoltaic panel bodies 11 to spread to the horizontal state, so that the photovoltaic panel bodies 11 can fully receive light.

[0079] In extreme weather such as rain or snow or at night, under the action of the light sensing unit 4, the rotating frame 22 will rotate in the opposite direction, so that the two groups of photovoltaic panel bodies 11 will be folded to completely overlap, thereby improving the protection performance of the photovoltaic panel bodies 11 in extreme weather such as rain or snow.

[0080] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-layer flat plate folding and unfolding mechanism, characterized in that: The multi-layer flat plate folding and unfolding mechanism comprises: A base (1), on which at least four groups of photovoltaic panel bodies (11) are mounted; A steering unit (2) is rotatably connected to the base (1) and connected to the photovoltaic panel body (11), and is used to drive the photovoltaic panel body (11) to steer. The steering unit (2) comprises: a rotating shaft (21) rotatably connected to the base (1), and having a rotating frame (22) installed on the surface; a rotating rod (23) rotatably connected to the end of the rotating frame (22), and having two groups of support plates (25) rotatably connected to the rotating rod (23), and at least four groups of photovoltaic panel bodies (11) are respectively installed on each group of support plates (25); and a rotating frame (24) rotatably connected to the surface of the rotating rod (23), and having two groups of rotating frames (24) installed, and the two groups of rotating frames (24) are respectively connected to the two groups of support plates (25); A folding unit (3) is provided on the base (1) and connected to the steering unit (2), and is used to cooperate with the steering unit (2) to realize the folding and unfolding of the photovoltaic panel body (11), wherein the folding unit (3) comprises: a slide groove (31) provided on the rotating frame (22), and a slider (32) is slidably connected inside the slide groove (31); a sliding member (33) is slidably connected to the side of the rotating frame (22), and the side is connected to the slider (32), and the sliding member (33) is hinged to the rotating frame (24) through two groups of arc rods (34); an arc groove (35) is provided on the base (1), and the center of the circle where the rotating shaft (21) and the arc groove (35) are located is eccentrically arranged, and the rotating shaft (21) is located above the center of the circle where the arc groove (35) is located; a sliding column (321) is connected to the slider (32), and the surface is slidably connected to the arc groove (35); The light sensing unit (4) is slidably connected to the base (1) and connected to the steering unit (2) for driving the steering unit (2) to steer on the base (1). The light sensing unit (4) comprises: a groove (41) provided on the base (1) and having a sliding frame (42) slidably connected therein, wherein the side surface of the sliding frame (42) and the inner wall of the groove (41) are connected via an elastic member (43); and a tilting frame (44) connected to the rotating frame (22) near the rotating shaft (21 ) is hinged to the side of the sliding frame (42) through a connecting rod (45); a light sensing frame (46) is fixed to the side of the base (1), and is slidably connected to a moving member (48) inside, and a side of the moving member (48) is connected to a push rod (481); an inclined groove (421) is provided on the side of the sliding frame (42), and the surface is slidably connected to the end of the push rod (481); an elastic air bag (47) is installed in the light sensing frame (46) and is connected to the side of the moving member (48); An opening and closing unit (5) is rotatably connected to the steering unit (2) and connected to the photovoltaic panel body (11), and is used to drive the multiple groups of photovoltaic panel bodies (11) to be folded or unfolded; The positioning unit (6) is provided on the opening and closing unit (5) and is used for positioning the opening and closing unit (5).

2. The multi-layer flat plate folding and unfolding mechanism according to claim 1, characterized in that: The opening and closing unit (5) comprises: A rotating disk (51) is fixed on the top corner of the photovoltaic panel body (11); A circular hole (52) is provided at the center of the rotating disk (51); The support rod (53) is fixed on the support plate (25) and is rotatably connected in the circular hole (52).

3. The multi-layer flat plate folding and unfolding mechanism according to claim 2, characterized in that: The positioning unit (6) comprises: A first groove (61) is provided on the rotating disk (51) and communicates with the circular hole (52); A semicircular groove (62) is provided on the rotating disk (51), and the circular hole (52) is located at the center of the circle where the semicircular groove (62) is located; The second groove (63) is formed on the rotating disk (51) and communicates with the end of the semicircular groove (62); The positioning column (64) is fixed on the rotating disk (51), and its surface is slidably connected in the semicircular groove (62) and the second groove (63).

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