Turnover type photovoltaic system

Abstract

A turnover photovoltaic system comprises a basic photovoltaic unit, a protective photovoltaic unit and a side wing photovoltaic unit. The protective photovoltaic unit is rotatably connected to the outer side of the width edge of the basic photovoltaic unit through a third transmission assembly, and the side wing photovoltaic units are rotatably connected to the outer sides of the length edges of the basic photovoltaic unit and the protective photovoltaic unit through folding mechanisms. A rotating shaft of the folding mechanism is perpendicular to a rotating shaft of the third transmission assembly. The folding mechanism comprises a driving piece, two transmission rods and two clamping heads, and the two adjacent end portions of the two transmission rods are each connected with one clamping head. The clamping head comprises a base part, a shaft is arranged on the first face of the base part, the shaft and the corresponding transmission rod are concentric and fixedly connected, and a plurality of meshing pieces are arranged on the second face, opposite to the first face, of the base part in the circumferential direction. The meshing pieces on the two clamping heads can be oppositely arranged and clamped in a staggered mode, and the driving piece can synchronously drive the two transmission rods to drive the two side wing photovoltaic units to be synchronously folded or unfolded. The clamping head is not easy to damage.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaics, in particular to a flip-type photovoltaic system. Background Art

[0002] With the continuous maturity of new energy technologies, photovoltaic power generation products have begun to be popularized for use in small areas, such as household photovoltaic brackets, vehicle-mounted photovoltaic brackets, etc. The shapes of the original photovoltaic bracket products are single, occupying a large space, and the applicable scenarios are limited. Chinese Invention Publication No. CN115037229A discloses a foldable adjustable photovoltaic module, which consists of six photovoltaic modules. When in use, the six photovoltaic modules are in an unfolded form and do not interfere with each other; when not in use, the photovoltaic modules can be folded into a stacked form by using a folding mechanism to reduce the occupied area.

[0003] In this embodiment, the action process of the foldable adjustable photovoltaic module from the fully unfolded state to the fully folded state is as follows: successively control two drive motors to fold the two side wing photovoltaic units of the basic photovoltaic unit and the protective photovoltaic unit. Under the action of the clamping joints, the side wing photovoltaic units on the same side can rotate synchronously. When the side wing photovoltaic units are folded to be parallel to the basic photovoltaic unit, the motor stops working and then controls the telescopic cylinder to work. The two telescopic cylinders extend simultaneously. At this time, the protective photovoltaic unit begins to fold towards the basic photovoltaic unit until the protective photovoltaic unit is parallel to the basic photovoltaic unit. It can be seen that the clamping joint is used as a coupling in the prior art.

[0004] The coupling in the prior art, namely the clamping joint, has a base part. A shaft is provided on the first surface of the disc and is concentric and fixedly connected to the transmission rod. The clamping joints are all located on the side where the fixed brackets are connected to each other; on the second surface of the disc opposite to the first surface, a number of telescopic joints are provided. The telescopic joints are evenly distributed in a circumferential manner, and the distance between two adjacent telescopic joints is the same as the diameter of the telescopic joint. When the basic photovoltaic unit and the protective photovoltaic unit are in the same plane, the telescopic joints on the two clamping joints cooperate with each other; when the basic photovoltaic unit and the protective photovoltaic unit are in the folded state, the two clamping joints are completely separated. Among them, the telescopic joint includes a connecting column, an elastic member, and a telescopic cap. The connecting column is fixedly connected to the middle disc of the clamping joint. The telescopic cap is hollow and sleeved on the connecting column. The elastic member uses a compression spring and is installed inside the telescopic cap and connects the connecting column and the telescopic cap. In the process of using this foldable adjustable photovoltaic module, it needs to be frequently unfolded / folded. Correspondingly, the telescopic joints of the clamping joint also need to be frequently telescoped. Therefore, it is very easy to be damaged. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a flip-type photovoltaic system, which reduces the possibility of damage to the clamping joint resulting in inability to fold and use, and extends the service life.

[0006] To achieve the above object, the present utility model adopts the following technical solutions: A flip-type photovoltaic system includes a basic photovoltaic unit, a protective photovoltaic unit, and a flank photovoltaic unit. The protective photovoltaic unit is rotationally connected to the outer side of the width side of the basic photovoltaic unit through a third transmission assembly, and the flank photovoltaic unit is rotationally connected to the outer sides of the length sides of the basic photovoltaic unit and the protective photovoltaic unit through a folding mechanism; the rotation axis of the folding mechanism is perpendicular to the rotation axis of the third transmission assembly; the folding mechanism includes a driving member, two transmission rods, and two clamping joints. One clamping joint is connected to each of the adjacent ends of the two transmission rods. The clamping joint includes a base portion. A shaft is provided on the first surface of the base portion and is concentric and fixedly connected to the corresponding transmission rod. A plurality of engaging members are provided circumferentially on the second surface of the base portion opposite to the first surface. The engaging members on the two clamping joints can be arranged oppositely and engage with each other in a staggered manner, so that the driving member can synchronously drive the two transmission rods to drive the two independent flank photovoltaic units to fold or unfold synchronously.

[0007] As a further improved technical solution of the present utility model, the engaging member includes a root portion connected to the base portion, a terminal portion away from the root portion, and an intermediate portion located between the root portion and the terminal portion. The diameter of the intermediate portion is larger than the diameters of the terminal portion and the root portion.

[0008] As a further improved technical solution of the present utility model, the distance between the intermediate portion and the root portion and the distance between the intermediate portion and the terminal portion are equal and the arcs are the same.

[0009] As a further improved technical solution of the present utility model, the gap between any one engaging member on one base portion corresponds to the adjacent two engaging members on the other base portion.

[0010] As a further improved technical solution of the present utility model, the engaging member is a hollow cylinder.

[0011] As a further improved technical solution of the present utility model, the location of the root portion is open and the terminal portion is closed.

[0012] As a further improved technical solution of the present utility model, the engaging members are evenly arranged in the circumferential direction of the base portion.

[0013] As a further improved technical solution of the present utility model, there are four engaging members on the base portion, and the projection positions of the four engaging members on the base portion are located at the four vertices of a square.

[0014] As a further improved technical solution of the present utility model, the folding mechanism includes a first transmission assembly and a second transmission assembly. There are four flanking photovoltaic units, which are respectively located on opposite sides of the basic photovoltaic unit and the protective photovoltaic unit. Two of the flanking photovoltaic units are respectively connected to the left side of the basic photovoltaic unit and the left side of the protective photovoltaic unit through the first transmission assembly, and the other two flanking photovoltaic units are respectively connected to the right side of the basic photovoltaic unit and the right side of the protective photovoltaic unit through the second transmission assembly.

[0015] As a further improved technical solution of the present utility model, the flanking photovoltaic unit includes a fixing frame and a connecting plate. The fixing frame is enclosed by two parallel support members and two parallel connecting members to form a rectangular structure for supporting and fixing the photovoltaic module. A part of the connecting plate is fixed to the transmission rod, and the other part is connected to the connecting member.

[0016] Compared with the prior art, a number of meshing members are provided on the second surface of the base, which is opposite to the first surface. The meshing members on the two clamping heads are arranged oppositely and are staggered and engaged with each other, so that one driving member can synchronously drive the two transmission rods. Since the meshing members in the flip-type photovoltaic system of the present utility model do not need to be frequently extended and retracted, the first transmission assembly and the second transmission assembly in the flip-type photovoltaic system of the present utility model are not easily damaged during the folding / unfolding process, and the service life is extended. The connection between the front and rear two clamping heads in the first transmission assembly and the second transmission assembly is tighter, so that better transmission effect and wear resistance effect are obtained. Description of the Drawings

[0017] Figure 1 is a three-dimensional combined view of the flip-type photovoltaic system of the present utility model, and the photovoltaic module is shown therein;

[0018] Figure 2 is the front view of the flip-type photovoltaic system of the present utility model;

[0019] Figure 3 is the left view of the flip-type photovoltaic system of the present utility model;

[0020] Figure 4 is Figure 1 a three-dimensional combined view of another angle of the flip-type photovoltaic system of the present utility model similar to

[0021] Figure 5 is Figure 4 the enlarged view of part A in

[0022] Figure 6 is the three-dimensional combined state view of two transmission rods and two clamping heads in the first transmission assembly or the second transmission assembly in the flip-type photovoltaic system of the present utility model;

[0023] Figure 7 is Figure 6 The three - dimensional exploded view of two card connectors in

[0024] Figure 8 is Figure 7 The three - dimensional view of the engaging part in the card connector in

[0025] Figure 9 is Figure 8 The top view of

[0026] Figure 10 is the cross - sectional view along the B - B line in Figure 9 ;

[0027] Figure 11 is Figure 1 A three - dimensional combined view of the flip - type photovoltaic system of the present invention similar to , and the photovoltaic modules are not shown;

[0028] Figure 12 is Figure 11 The enlarged view of part C in Detailed implementation manners

[0029] The following will describe in detail the exemplary specific implementation manners of the present invention with reference to the drawings. If there are several specific implementation manners, the features in these implementation manners can be combined with each other without conflict. When the description involves the drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The content described in the following exemplary specific implementation manners does not represent all implementation manners consistent with the present invention; on the contrary, they are only examples of devices, products, and / or methods consistent with some aspects of the present invention recorded in the claims of the present invention.

[0030] The terms used in the present invention are only for the purpose of describing specific implementation manners and are not intended to limit the protection scope of the present invention. The singular forms of "a", "the", or "said" used in the specification and claims of the present invention are also intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should be understood that the terms such as "first", "second" and similar terms used in the description and claims of the present utility model do not denote any order, quantity or importance, but are only used to distinguish the named features. Similarly, terms such as "a" or "one" do not denote a quantity limitation, but indicate the presence of at least one. Unless otherwise indicated, the terms such as "front", "rear", "upper", "lower" and similar terms in the present utility model are only for convenience of description and are not limited to a specific position or a spatial orientation. The terms such as "comprising" or "including" are open-ended expressions, meaning that the elements appearing before "comprising" or "including" cover the elements appearing after "comprising" or "including" and their equivalents, and this does not exclude that the elements appearing before "comprising" or "including" may further include other elements. If the term "a number of" appears in the present utility model, it means two or more.

[0032] Please refer to Figures 1 to 12 As shown, the present utility model discloses a flip-type photovoltaic system, which includes a basic photovoltaic unit 11, a protective photovoltaic unit 12 and side-wing photovoltaic units 13. There is one basic photovoltaic unit 11 and one protective photovoltaic unit 12, and the protective photovoltaic unit 12 is located at one end of the basic photovoltaic unit 11. There are four side-wing photovoltaic units 13, which are respectively located on the opposite sides of the basic photovoltaic unit 11 and the protective photovoltaic unit 12. Therefore, the side-wing photovoltaic units 13 are divided into a first group on the left side and a second group on the right side, and each group includes two front and rear photovoltaic units. It should be noted that the photovoltaic units (basic photovoltaic unit 11, protective photovoltaic unit 12 and side-wing photovoltaic units 13) herein are only carriers for supporting and accommodating photovoltaic modules 200; in another embodiment, the photovoltaic unit may be a combination of a photovoltaic module 200 and a photovoltaic module carrier.

[0033] Please refer to Figures 1 to 12As shown in the figure, the flip - type photovoltaic system of the present utility model further includes a photovoltaic system including a controller (not labeled) and a folding structure (not labeled), and the controller controls the operation of the folding structure. The folding structure at least includes a first transmission component 101 and a second transmission component 102. It can also be understood that, in a narrow sense, the folding mechanism is the upper - level concept of the first transmission component 101 and the second transmission component 102. The flip - type photovoltaic system of the present utility model further includes a third transmission component 103. In a broad sense, the folding mechanism can also be understood as the upper - level concept of the first transmission component 101, the second transmission component 102, and the third transmission component 103. A part of the flank photovoltaic units 13 (such as the front and rear two photovoltaic units in the first group) are respectively connected to the left side of the basic photovoltaic unit 11 and the left side of the protective photovoltaic unit 12 through the first transmission component 101. Another part of the flank photovoltaic units 13 (such as the front and rear two photovoltaic units in the second group) are respectively connected to the right side of the basic photovoltaic unit 11 and the right side of the protective photovoltaic unit 12 through the second transmission component 102. The protective photovoltaic unit 12 is connected to the basic photovoltaic unit 11 through the third transmission component 103. Therefore, please refer to Figure 1 and combine with Figure 11 It can be understood that the protective photovoltaic unit 12 is rotatably connected to the outer side of the width side of the basic photovoltaic unit 11 through the third transmission component 103, and the flank photovoltaic units 13 are rotatably connected to the outer sides of the length sides of the basic photovoltaic unit 11 and the protective photovoltaic unit 12 through the folding mechanism; as can be seen from Figure 11 it, the rotation axis of the folding mechanism is perpendicular to the rotation axis of the third transmission component 103.

[0034] In the flip - type photovoltaic system of the present utility model, the first transmission assembly 101 and the second transmission assembly 102 have the same structure, that is, the folding mechanism includes a driving member 1, two transmission rods 2, and two clamping connectors 3. One clamping connector 3 is connected to each of the adjacent ends of the two transmission rods 2. The clamping connector 3 includes a base 30. A shaft 301 is provided on the first surface of the base 30 and is concentric and fixedly connected to the corresponding transmission rod 2. A plurality of engaging members 302 are provided on the second surface of the base 30 opposite to the first surface. When the basic photovoltaic unit 11 and the protective photovoltaic unit 12 are in the same plane, the engaging members 302 on the two clamping connectors 3 can be arranged opposite to each other and staggeredly engaged, so that one driving member 1 can synchronously drive the two transmission rods 2 to drive the two independent wing - type photovoltaic units 13 to fold or unfold synchronously. Compared with the prior art, in the folding / unfolding process of the first transmission assembly 101 and the second transmission assembly 102 in the flip - type photovoltaic system of the present utility model, there is no need for frequent telescoping, so it is not easy to be damaged, and the connection between two adjacent clamping connectors 3 in either the first transmission assembly 101 or the second transmission assembly 102 can be made closer, having better transmission effect and wear - resistant effect.

[0035] Please refer to Figures 6 to 10 As shown, the engaging member 302 includes a root portion 3021 connected to the base 30, a terminal portion 3023 far from the root portion 3021, and an intermediate portion 3022 located between the root portion 3021 and the terminal portion 3023. The diameter of the intermediate portion 3022 is larger than the diameters of the terminal portion 3023 and the root portion 3021. In short, because the intermediate portion 3022 is thicker than the terminal portion 3023, any engaging member 302 on one base 30 can correspond to the gap between two adjacent engaging members 302 on the other base 30. That is, the fact that the terminal portion 3023 is thinner than the intermediate portion 3022 can ensure guiding insertion, and the fact that the intermediate portion 3022 is thicker than the terminal portion 3023 can ensure that the interference positioning between the two engaging members 302 after insertion does not come off.

[0036] Please refer to Figures 1 to 10 As shown, the distance between the intermediate portion 3022 and the root portion 3021 and the distance between the intermediate portion 3022 and the terminal portion 3023 are equal and the arcs are the same. Designing the outer surface of the engaging member 302 into the shape of a circular - drum side wall with equal distances and the same arcs at the upper and lower ends relative to the intermediate portion is beneficial to the forming of the engaging member 302.

[0037] Please refer to Figures 5 to 7As shown, when the basic photovoltaic unit 11 and the protective photovoltaic unit 12 are in the same plane, any engaging member 302 on one of the bases 30 can correspond to the gap between two adjacent engaging members 302 on the other base 30. That is, by using the method of inserting the engaging members 302 into the gaps in an interleaved manner, the positioning effect during engagement and the convenience of disengagement when not engaged can be ensured.

[0038] Please refer to Figure 8 and Figure 10 As shown, the engaging member 302 is made of a rigid material. The rigid material includes a metal material (such as steel), which is not easily deformed and can ensure the positioning effect during engagement.

[0039] Please refer to Figure 10 As shown, the engaging member 302 is a hollow cylinder. The setting of the hollow cylinder is to reduce the weight of the engaging member 302, which is beneficial to molding and cost reduction.

[0040] Please refer to Figures 6 to 10 As shown, the location of the root 3021 is open and the end portion 3023 is closed. The open shape of the root 3021 is to meet the assembly requirements, and the closed shape of the end portion 3023 is to prevent dust and the like from falling into the hollow cylinder and for the need of good appearance.

[0041] Please refer to Figure 7 As shown, the outer edge of the base 30 is circular. In a specific embodiment, the driving member 1 is a motor; under the driving force of the driving member 1, the base 30 rotates with the output end of the driving member 1, driving the engaging member 302 thereon to rotate together. The circularly arranged base 30 can ensure that during the rotation process, the outer edge of the base 30 does not interfere with other components of the present invention.

[0042] Please refer to Figure 7 As shown, the engaging members 302 are uniformly arranged in the circumferential direction of the base 30. The uniform arrangement makes the gaps between two adjacent engaging members 302 equal, and can achieve the convenient effect of engagement and separation.

[0043] Please refer to Figures 5 to 7 As shown, in a specific embodiment, there are four engaging members 302 on the base 30, and the projection positions of the four engaging members 302 on the base 30 are located at the four vertices of a square. The specific embodiment of the present invention further ensures the uniform arrangement of the engaging members 302 in the circumferential direction of the base 30, making the gaps between two adjacent engaging members 302 equal.

[0044] The flip - type photovoltaic system of the present utility model comprises a basic photovoltaic unit 11, a protective photovoltaic unit 12 and four flank photovoltaic units 13, that is, a total of six photovoltaic units. Please refer to Figure 2 and Figure 3 , the specific working process of the flip - type photovoltaic system of the present utility model is as follows: First, the front and rear two photovoltaic units of the first group of the flank photovoltaic units 13 are respectively connected to the left side of the basic photovoltaic unit 11 and the left side of the protective photovoltaic unit 12 through the first transmission assembly 101. Thus, the front and rear two photovoltaic units of the first group of the flank photovoltaic units 13 are folded to the right along the Figure 2 left - hand arrow in and cover the corresponding basic photovoltaic unit 11 and protective photovoltaic unit 12 (from six to four, that is, the photovoltaic units in the top - view state become only four visible); Secondly, the front and rear two photovoltaic units of the second group of the flank photovoltaic units 13 are respectively connected to the right side of the basic photovoltaic unit 11 and the right side of the protective photovoltaic unit 12 through the second transmission assembly 102. Thus, the front and rear two photovoltaic units of the second group of the flank photovoltaic units 13 are folded to the left along the Figure 2 right - hand arrow in and cover the corresponding basic photovoltaic unit 11 and protective photovoltaic unit 12 (from four to two, that is, the photovoltaic units in the top - view state become only two visible); Finally, please refer to Figure 3 , the protective photovoltaic unit 12 is connected to the basic photovoltaic unit 11 through the third transmission assembly 103, so as to fold and cover the protective photovoltaic unit 12 onto the basic photovoltaic unit 11 (from two to one, that is, the photovoltaic units in the top - view state become only one visible). In this way, the six photovoltaic units are folded together into one piece. And it can be known that the process of unfolding the photovoltaic units from one stacked piece to six flat pieces is exactly the opposite of the folding process described above, which will not be elaborated here.

[0045] Please refer to Figure 1 、 Figure 11 and Figure 12 . Figure 1 is a three - dimensional combination view of the flip - type photovoltaic system of the present utility model and Figure 1 shows the photovoltaic module 200 therein; Figure 11 is a three - dimensional combination view of the flip - type photovoltaic system of the present utility model similar to Figure 1 and the photovoltaic module 200 in Figure 1 is not shown in Figure 11 ; Figure 12 is Figure 11An enlarged view of part C. It can be easily seen that the flanking photovoltaic unit 13 includes a fixing frame 131 and a connecting plate 132. The fixing frame 131 is formed into a rectangular structure by enclosing two parallel support members 1311 and two parallel connecting members 1312, and is used to support and fix the photovoltaic module 200. The connecting plate 132 includes a vertical short side portion and a long side portion perpendicular to the short side portion. The short side portion of the connecting plate 132 is fixed to the transmission rod 2, and the long side portion is connected to the connecting member 1312. Such a setting can make the flanking photovoltaic unit 13 and the basic photovoltaic unit 11 and the protective photovoltaic unit 12 be in a state of vertical dislocation in the horizontal state. Due to the fixed connection of the connecting plate 132 between the transmission rod 2 and the connecting member 1312, the driving member 1 drives the transmission rod 2, thereby being able to drive the connecting plate 132, and further drive the fixing frame 131 to fold and turn. Specifically, for the folding and rotation between the flanking photovoltaic unit 13 and the basic photovoltaic unit 11, it is because the main body part of the driving member 1 (motor) is fixed to the basic photovoltaic unit 11, the transmission rod 2 can rotate relative to the basic photovoltaic unit 11, and the fixing frame 131 of the flanking photovoltaic unit 13 is fixed to the transmission rod 2, so as to achieve relative rotation; for the folding and rotation between the flanking photovoltaic unit 13 and the protective photovoltaic unit 12, it is also because another section of the transmission rod 2 can rotate relative to the protective photovoltaic unit 12, and the fixing frame 131 of the flanking photovoltaic unit 13 is fixed to another section of the transmission rod 2, so as to achieve relative rotation. The lengths of the short side portions of the connecting plates on both sides of the basic photovoltaic unit 11 are different, so that there will be a vertical dislocation between the flanking photovoltaic units 13 on both sides, which is used to enable the photovoltaic modules 200 on both sides of the basic photovoltaic unit 11 to be stacked up and down; the lengths of the short side portions of the connecting plates on both sides of the protective photovoltaic unit 12 are different, so that there will also be a vertical dislocation between the two flanking photovoltaic units 13, which is used to enable the photovoltaic modules 200 on both sides of the protective photovoltaic unit 12 to be stacked up and down. The above is the structural principle of the folding mechanism in the narrow sense, that is, the first transmission assembly 101 and the second transmission assembly 102; the protective photovoltaic unit 12 also needs to be connected and fixed to the third transmission assembly 103 by an additionally provided connecting plate to realize the folding and unfolding of the protective photovoltaic unit 12 relative to the basic photovoltaic unit 11. The structural principle is the common knowledge of those skilled in the art and will not be elaborated here.

[0046] In the flip - type photovoltaic system of the present utility model, the first transmission assembly 101 and the second transmission assembly 102 have the same structure, that is, the folding mechanism includes a driving member 1, two transmission rods 2, and two clamping joints 3. One clamping joint 3 is connected to adjacent ends of the two transmission rods 2. The clamping joint 3 includes a base 30. A shaft 301 is provided on the first surface of the base 30 and is concentric and fixedly connected to the corresponding transmission rod 2. A number of engaging members 302 are provided on the second surface of the base 30, which is opposite to the first surface. When the basic photovoltaic unit 11 and the protective photovoltaic unit 12 are in the same plane, the engaging members 302 on the two clamping joints 3 can be oppositely arranged and staggeredly engaged with each other, so that one driving member 1 can synchronously drive the two transmission rods 2 to drive the two independent flank photovoltaic units 13 to fold or unfold synchronously. Compared with the prior art, during the folding / unfolding process of the flip - type photovoltaic system of the present utility model, there is no need for frequent telescoping, so it is not easily damaged and the service life is extended; moreover, the connection between the two clamping joints 3 can be made closer, with better transmission and wear - resistant effects.

[0047] The above - mentioned embodiments are only used to illustrate the present utility model and do not limit the technical solutions described in the present utility model. The understanding of the present utility model should be based on those skilled in the art of the relevant technical field. Although this specification has described the present utility model in detail with reference to the above - mentioned embodiments, those of ordinary skill in the art should understand that those skilled in the relevant technical field can still modify the present utility model or make equivalent replacements. All technical solutions and their improvements that do not depart from the spirit and scope of the present utility model shall be covered by the scope of the claims of the present utility model.

Claims

1. A flip-type photovoltaic system, characterized in that: It includes a basic photovoltaic unit (11), a protective photovoltaic unit (12) and a flank photovoltaic unit (13). The protective photovoltaic unit (12) is rotationally connected to the outer side of the width edge of the basic photovoltaic unit (11) through a third transmission assembly (103), and the flank photovoltaic unit (13) is rotationally connected to the outer sides of the length edges of the basic photovoltaic unit (11) and the protective photovoltaic unit (12) through a folding mechanism; the rotation axis of the folding mechanism is perpendicular to the rotation axis of the third transmission assembly (103). The folding mechanism includes a driving member (1), two transmission rods (2) and two clamping joints (3). One clamping joint (3) is connected to adjacent ends of the two transmission rods (2). The clamping joint (3) includes a base (30). A shaft (301) is provided on the first surface of the base (30) and is concentric and fixedly connected to the corresponding transmission rod (2). A plurality of engaging members (302) are provided on the second surface of the base (30) opposite to the first surface along the circumferential direction. The engaging members (302) on the two clamping joints (3) can be oppositely arranged and staggeredly engaged with each other, so that the driving member (1) can synchronously drive the two transmission rods (2) to drive the two independent flank photovoltaic units (13) to fold or unfold synchronously.

2. The flip - type photovoltaic system according to claim 1, wherein: The engaging member (302) includes a root portion (3021) connected to the base (30), a terminal portion (3023) far from the root portion (3021), and an intermediate portion (3022) located between the root portion (3021) and the terminal portion (3023). The diameter of the intermediate portion (3022) is larger than the diameters of the terminal portion (3023) and the root portion (3021).

3. The flip - type photovoltaic system according to claim 2, wherein: The distance between the intermediate portion (3022) and the root portion (3021) and the distance between the intermediate portion (3022) and the terminal portion (3023) are equal and the radian is the same.

4. The flip - type photovoltaic system according to claim 2, wherein: The gap between any one engaging member (302) on one base (30) corresponds to the adjacent two engaging members (302) on the other base (30).

5. The flip - type photovoltaic system according to claim 2, wherein: The engaging member (302) is a hollow cylinder.

6. The flip - type photovoltaic system according to claim 5, characterized in that: The location of the root portion (3021) is in an open shape and the terminal portion (3023) is in a closed shape.

7. The flip - type photovoltaic system according to claim 1, characterized in that: The engaging members (302) are uniformly arranged in the circumferential direction of the base (30).

8. The flip - type photovoltaic system according to claim 7, wherein: There are four engaging members (302) on the base (30), and the projection positions of the four engaging members (302) on the base (30) are located at the four vertices of a square.

9. The flip - type photovoltaic system according to any one of claims 1 - 8, characterized in that: The folding mechanism includes a first transmission component (101) and a second transmission component (102). There are four flank photovoltaic units (13) which are respectively located on opposite sides of the basic photovoltaic unit (11) and the protective photovoltaic unit (12). Two of the flank photovoltaic units (13) are respectively connected to the left side of the basic photovoltaic unit (11) and the left side of the protective photovoltaic unit (12) through the first transmission component (101), and the other two flank photovoltaic units (13) are respectively connected to the right side of the basic photovoltaic unit (11) and the right side of the protective photovoltaic unit (12) through the second transmission component (102).

10. The flip - type photovoltaic system according to claim 9, wherein: The flank photovoltaic unit (13) includes a fixing frame (131) and a connecting plate (132). The fixing frame (131) is formed into a rectangular structure by enclosing two parallel support members (1311) and two parallel connecting members (1312), and is used to support and fix the photovoltaic module (200). A part of the connecting plate (132) is fixed to the transmission rod (2), and the other part is connected to the connecting member (1312).

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