Photovoltaic tracking support with limit protection function

Abstract

The present application relates to the technical field of tracking support, especially to a photovoltaic tracking support with limiting protection function, comprising a torque tube, a connecting bridge, a support seat, a support arm, a lock head, a clamp, a purlin, a first stand, a second stand, a driving mechanism and a crank, the second stand is used for installing the driving mechanism, the support seat is fixedly installed on the top of the first stand through a stand adapter, adjacent torque tubes are fixedly combined through the connecting bridge to form a continuous structure in the length direction of the torque tube, the support arm is integrally formed with the support seat, the second hanging part on the top of the support arm is aligned with the first hanging part on the connecting bridge, the connecting bridge is hung and rotated on the support arm through the cooperation of the rotating shaft, the lock head is rotatably installed on the connecting bridge, when the driving mechanism drives the torque tube to rotate, the torque tube drives the connecting bridge to synchronously rotate on the support arm, and then drives the lock head to synchronously rotate, thereby reducing the response time of the tracking support rotating to the protection angle, and improving the structural safety and wind resistance.

Description

Technical Field

[0001] This invention relates to the field of tracking bracket technology, and in particular to a photovoltaic tracking bracket with limit protection function. Background Technology

[0002] Photovoltaic tracking brackets, as structural devices specifically designed for photovoltaic power generation systems, primarily function to support and fix photovoltaic modules (such as solar panels). They also automatically or manually adjust according to the sun's trajectory to maximize the angle and time at which the photovoltaic modules receive solar radiation, thereby improving power generation efficiency. This type of bracket system not only requires sufficient strength and stability to withstand external forces under various climatic conditions, but also needs good corrosion resistance and durability to ensure long-term stable operation.

[0003] For tracking brackets, one of the major factors causing structural damage is high wind load. Existing tracking brackets have at least one of the following problems when dealing with high winds: 1. Using only a single worm gear reducer located in the middle of a single row as a self-locking point, the torque tube far from the middle position is prone to deformation and damage under strong wind conditions; 2. Although some manufacturers have set up corresponding wind protection strategies, choosing to stop at a small angle (i.e., when the photovoltaic modules are near the flat position) to reduce wind load or at a large angle (i.e., at the extreme angle of the tracking bracket rotation) to provide more locking point protection, the corresponding time to rotate to a small or large angle is relatively long because it is impossible to accurately judge the time when the strong wind will arrive. During the process of rotating to a small or large angle, the bracket structure may be damaged. 3. Existing technologies employ multi-point electrical drives to rotate the tracking bracket. These drives use the unidirectional self-locking function of multiple synchronously rotating worm gear reducers to lock at any angle. However, due to the use of multiple drives and the need for communication between them to achieve synchronous rotation, the cost is high and it is not suitable for large-scale promotion and use.

[0004] 4. For tracking brackets that suspend torque tubes through the housing, since the housing is higher than the purlins, the cost of installing photovoltaic modules on the top of the non-drive column is high. Generally, the column is left empty and no photovoltaic modules are installed. The utilization rate of the torque tube in the length direction is low. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, a photovoltaic tracking bracket with limit protection function is provided.

[0006] The specific technical solution is as follows: Design a photovoltaic tracking bracket with limit protection function, including: Torque tubes, adjacent torque tubes form a continuous structure in the length direction through connecting bridges; A support base is provided with a first locking area and a second locking area. The support base includes a support arm, and the connecting bridge is rotatably connected to the support arm. The bottom of the connecting bridge is provided with a slot for the support arm to pass through. A lock head, which is rotatably mounted on the bottom of the connecting cable tray, which has a passage state and a first locking state when passing the support seat; In the passage state, the lock head passes obliquely through the support seat; in the first locking state, the lock head is obliquely attached to the first locking area or the second locking area to prevent the connecting bridge from driving the torque tube to continue rotating; the connecting bridge switches between the passage state and the first locking state by rotating in the opposite direction.

[0007] As a further improvement of the present invention, a drive mechanism is also included, wherein the drive mechanism is fixedly connected to the torque tube via a crank, the crank having a first connecting end and a second connecting end in the vertical direction, wherein the first connecting end is used to connect to the drive mechanism and the second connecting end is used to connect to the torque tube, thereby suspending the torque tube on the drive mechanism.

[0008] As a further improvement of the present invention, the end of the support base is provided with a protruding plate, and an arc-shaped plate is provided between the protruding plates. The first locking area and the second locking area are set as corner areas formed between the arc-shaped plate and the protruding plate.

[0009] As a further improvement of the present invention, a purlin is fixedly installed on the torque tube. The purlin is used to install photovoltaic modules. In the vertical direction, the purlin protrudes from the highest point of the connecting cable tray.

[0010] As a further improvement of the present invention, the support base and the support arm are integrally formed.

[0011] As a further improvement of the present invention, the connecting bridge includes a lower enclosure and an upper connecting part. The upper connecting part is disposed on the top of the lower enclosure. The lower enclosure and the upper connecting part are integrally formed. The lower enclosure is attached to the torque tube. A first suspension part is disposed on the upper connecting part. A second suspension part is disposed on the top of the support arm. The first suspension part and the second suspension part are rotatably connected by a rotating shaft, thereby suspending the connecting bridge on the support arm.

[0012] As a further improvement of the present invention, a first ear plate is formed at the outer end of the lower enclosure portion, and the first ear plate uses a clamp to hold the connecting bridge to the outside of the torque tube. A mounting portion for installing a lock head is provided at the bottom of the lower enclosure portion.

[0013] As a further improvement of the present invention, the connecting bridge has a passage state and a second locking state when rotating around the support arm. The slot is opened in the middle of the lower enclosure and distributed along the circumferential direction. The slot forms a third locking area and a fourth locking area between the upper connecting part and the circumferential direction. In the second locking state, the support arm contacts the third or fourth locking area to prevent the connecting bridge from continuing to rotate, thereby preventing the torque tube from continuing to rotate.

[0014] As a further improvement of the present invention, it also includes a first column and a second column, wherein the support base is fixedly installed on the top of the first column through a column adapter, and the driving mechanism is fixedly installed on the top of the second column.

[0015] As a further improvement of the present invention, it also includes a first column and a second column, wherein an mounting plate is fixedly formed at the bottom of the support base, the support base is fixedly installed on the top of the first column through the mounting plate, and the driving mechanism is fixedly installed on the top of the second column.

[0016] The above technical solution has at least one of the following advantages or beneficial effects: The limiting structure formed by the locking head and support base allows the tracking bracket to remain open during normal operation. When strong winds occur, it rotates in the opposite direction to enter the locking state, locking the torque tube in a safe position. This provides wind protection for the entire tracking bracket and improves its wind resistance. In particular, locking the tracking bracket within a small angle range is more advantageous when parking at night, reducing the rotation angle required for the torque tube to reach the first or second locking area, thus quickly achieving locking protection.

[0017] By using the support arm in conjunction with the third and fourth locking areas on the slot, the tracking bracket has the function of limiting and locking against wind at large angles. When strong winds strike, the tracking bracket can flexibly choose to rotate to a large or small angle to limit and lock according to its current angle. The response time of the tracking bracket rotating from any position to the protection angle is reduced by at least half, effectively reducing the response time of the tracking bracket rotating to the protection angle, thereby improving the overall safety and wind resistance of the tracking bracket.

[0018] By distributing the wind load borne by the overall tracking support to multiple second columns, the wind load is effectively dispersed, making full use of the structural strength of each column and improving the structural safety and wind resistance of the overall tracking support.

[0019] By using a connecting bridge consisting of an upper connecting part and a lower surrounding part to suspend and install the torque tube, compared with the existing technology that uses a taller shell to install the torque tube, the purlin protrudes from the highest point of the connecting bridge in the vertical direction, so that the top of the connecting bridge can also be used to install photovoltaic modules. This effectively improves the space utilization rate of the top of the first column, achieves a continuous paving without large gaps in the length direction of the single row of tracking brackets, reduces the overall cost of photovoltaic tracking brackets, and improves the aesthetics of the overall structure. Attached Figure Description

[0020] Embodiments of the invention will be described more fully with reference to the accompanying drawings. However, the drawings are for illustration and explanation only and do not constitute a limitation on the scope of the invention.

[0021] Figure 1 This is a three-dimensional structural diagram of a photovoltaic tracking bracket with limit protection function for installing photovoltaic modules, as proposed in this invention. Figure 2 This is a three-dimensional structural diagram of a photovoltaic tracking bracket with limit protection function proposed in this invention; Figure 3 This is an exploded view of a photovoltaic tracking bracket with limit protection function proposed in this invention; Figure 4 This is a schematic diagram of the connecting bridge structure in a photovoltaic tracking bracket with limit protection function proposed in this invention; Figure 5 This is a schematic diagram of the support base in a photovoltaic tracking bracket with limit protection function proposed in this invention; Figure 6 This is a three-dimensional structural diagram of a photovoltaic tracking bracket with limit protection function proposed in this invention; Figure 7 This is an exploded view of a photovoltaic tracking bracket with limit protection function proposed in this invention; Figure 8 This is a schematic diagram of the support base in a photovoltaic tracking bracket with limit protection function proposed in this invention; Figure 9 This is a right view of a photovoltaic tracking bracket with limit protection function proposed in the present invention in the first locked state; Figure 10 This is a right view of a photovoltaic tracking bracket with limit protection function proposed in the present invention in the second locked state; Figure 11 This is a three-dimensional structural diagram of a photovoltaic tracking bracket with limit protection function proposed in the present invention in the second locked state; The reference numerals in the above figures indicate: 1. Torque tube; 2. Connecting bridge; 21. Groove; 22. Lower enclosure; 23. Third locking area; 24. Fourth locking area; 25. First suspension part; 26. Upper connecting part; 27. First ear plate; 28. Mounting part; 3. Support base; 31. Support arm; 32. Arc plate; 33. First locking area; 34. Second locking area; 35. Second suspension part; 36. Mounting plate; 4. Lock head; 5. Clamp; 6. Purlin; 7. First column; 8. Column adapter; 9. Second column; 10. Drive mechanism; 11. Crank. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0025] Reference Figures 1-11 A photovoltaic tracking bracket with limit protection function includes: Torque tube 1, adjacent torque tubes 1 form a continuous structure in the length direction through connecting bridge 2; The support base 3 is provided with a first locking area 33 and a second locking area 34. The support base 3 includes a support arm 31. The connecting bridge 2 is rotatably connected to the support arm 31. The bottom of the connecting bridge 2 is provided with a slot 21 for the support arm 31 to pass through. The lock head 4 is rotatably mounted on the bottom of the connecting cable tray 2. The connecting cable tray 2 has a passing state and a first locking state when passing the support seat 3. The lock head 4 has a spindle-shaped pointed head. When the lock head 4 is locked in the first locking area 32 or the second locking area 33, the pointed head on the lock head 4 is in contact with the first locking area 32 or the second locking area 33. In the passage state, the lock head 4 passes obliquely through the support base 3; in the first locking state, the lock head 4 is obliquely attached to the first locking area 33 or the second locking area 34 to prevent the connecting bridge 2 from driving the torque tube 1 to continue rotating; the connecting bridge 2 switches between the passage state and the first locking state by rotating in the opposite direction. For example, when switching from the passage state to the first locking state, when the lock head 4 rotates counterclockwise to the top of the arc plate 32, the lock head 4 tilts to the left, and the rotation direction of the torque tube 1 is changed to clockwise by the drive mechanism 10, so that the lock head 4 is locked at the second locking area 34, forming the first locking state; when it is necessary to enter the passage state from the first locking state, the torque tube 1 is rotated counterclockwise to enter the passage state.

[0026] In some alternative embodiments, a drive mechanism 10 is also included. The drive mechanism 10 is fixedly connected to the torque tube 1 via a crank 11. The crank 11 has a first connecting end and a second connecting end in the vertical direction. The first connecting end is used to connect to the drive mechanism 10, and the second connecting end is used to connect to the torque tube 1, so that the torque tube 1 is suspended on the drive mechanism 10. The torque tube 1 is suspended relative to the drive mechanism 10 by the crank 11. When rotating, the center of mass of the entire photovoltaic tracking bracket is basically coincident with the center of rotation of the torque tube 1, thereby reducing the load on the drive mechanism 10 connected to the torque tube 1.

[0027] In some alternative embodiments, the end of the support base 3 is provided with a protruding plate, and an arc plate 32 is provided between the protruding plates. The first locking area 33 and the second locking area 34 are set as the corner area formed between the arc plate 32 and the protruding plate. The protruding plate plays a guiding role when the lock head 4 passes by, so that the lock head 4 can move in a passing state when it falls on the arc plate 32.

[0028] In some alternative embodiments, a purlin 6 is fixedly installed on the torque tube 1. The purlin 6 is used to install photovoltaic modules. In the vertical direction, the purlin 6 protrudes from the highest point of the connecting cable tray 2.

[0029] In some alternative embodiments, the support base 3 and the support arm 31 are integrally formed.

[0030] In some optional embodiments, the connecting cable tray 2 includes a lower enclosure 22 and an upper connecting portion 26. The upper connecting portion 26 is disposed on the top of the lower enclosure 22. The lower enclosure 22 and the upper connecting portion 26 are integrally formed. The lower enclosure 22 is attached to the torque tube 1. A first suspension portion 25 is provided on the upper connecting portion 26. A second suspension portion 35 is provided on the top of the support arm 31. The first suspension portion 25 and the second suspension portion 35 are rotatably connected by a rotating shaft, thereby suspending the connecting cable tray 2 on the support arm 31. The outline dimensions of the lower enclosure 22 match the outline dimensions of the bottom of the torque tube 1. Both the first suspension portion 25 and the second suspension portion 35 are provided with through holes for the rotating shaft to pass through, thereby suspending the connecting cable tray 2 on the support arm 31.

[0031] As an optional solution, a first ear plate 27 is formed at the outer end of the lower enclosure 22. The first ear plate 27 holds the connecting bridge 2 to the outside of the torque tube 1 by the clamp 5. The bottom of the lower enclosure 22 is provided with a mounting part 28 for mounting the lock head 4. The mounting part 28 is preferably a second ear plate. The top of the lock head 4 is formed in a connecting part that cooperates with the second ear plate. A pin passes through the second ear plate and the connecting part, so that the lock head 4 is rotatably mounted on the bottom of the lower enclosure 22.

[0032] As another option, the connecting bridge 2 has a passage state and a second locking state when rotating around the support arm 31. The slot 21 is opened in the middle of the lower enclosure 22 and distributed in the circumferential direction. The slot 21 forms a third locking area 23 and a fourth locking area 24 between the circumferential direction and the upper connecting part 26. In the second locking state, the support arm 31 contacts the third locking area 23 or the fourth locking area 24 to prevent the connecting bridge 2 from continuing to rotate, thereby preventing the torque tube 1 from continuing to rotate.

[0033] Furthermore, it also includes a first column 7 and a second column 9. The support 3 is fixedly installed on the top of the first column 7 through the column adapter 8, and the drive mechanism 10 is fixedly installed on the top of the second column 9.

[0034] As another feasible solution, it also includes a first column 7 and a second column 9. The bottom of the support base 3 is fixedly formed with an mounting plate 36. The support base 3 is fixedly installed on the top of the first column 7 through the mounting plate 36, and the drive mechanism 10 is fixedly installed on the top of the second column 9.

[0035] By distributing the wind load borne by the overall photovoltaic tracking bracket to multiple second columns, the wind load is effectively dispersed, making full use of the structural strength of each column and improving the structural safety and wind resistance of the overall tracking bracket.

[0036] like Figure 9 , Figure 10 As shown, taking the tracking bracket normally tracking the sun's rotation during the day and stopping at a small angle near 0 degrees at night as an example, in the early morning, the photovoltaic modules installed on the tracking bracket face the direction of the rising sun in the east, and in the evening, the photovoltaic modules installed on the tracking bracket face the direction of the setting sun in the west. During this process, the tracking bracket rotates counterclockwise from west to east. During the daytime sun tracking process, the torque tube 1 is always in a passing state, and the locking head 4 moves from the upper left through the first locking area 33 and the second locking area 34 on the support base 3 to the upper right. During this process, the locking head 4 exhibits different postures, as detailed below: In the morning, the lock head 4 is located on the upper left of the support base 3 and is vertical under the influence of gravity. As the sun rises, the lock head 4 tilts counterclockwise towards the protruding plate on the left side of the support base 3, and after passing the second locking area 34, it falls onto the arc plate 32 of the support base 3 and slides across the support base 3 in a leftward tilt. When passing the first locking area 33, the lock head 4 does not lock against the first locking area 33 and can pass smoothly over the first locking area 33. After disengaging from the protruding plate on the right side, the lock head 4 is vertical under the influence of gravity until the sun sets in the evening. Therefore, it can be seen that the lock head 4 is always in a passable state when it is normally tracking the sun during the day.

[0037] Similarly, during the nighttime return process, when the tracking bracket rotates back to face the photovoltaic modules eastward, the lock head 4 remains in a passable state during the rotation. This demonstrates that the lock head 4 and the support base 3 do not affect the normal operation of the tracking bracket.

[0038] When a strong wind blows, when the lock head 4 is located between the first locking area 33 and the second locking area 34 on the support base 3, or is located outside the support base 3 but near the first locking area 33 and the second locking area 34, the rotation direction of the tracking bracket is controlled according to the position of the lock head 4, as follows: When the lock head 4 is between the first locking area 33 and the second locking area 34 on the support base 3, if the lock head 4 is tilted to the left (i.e., during normal daytime tracking), the torque tube 1 is controlled to rotate clockwise instead of counterclockwise, so that the lock head 4 is attached to the second locking area 34, thereby limiting the torque tube 1 and preventing it from rotating further; if the lock head 4 is tilted to the right (i.e., during nighttime return), the torque tube 1 is controlled to rotate counterclockwise instead of clockwise, so that the lock head 4 is attached to the first locking area 33, thus limiting the torque tube 1. When the lock head 4 is located outside the support base 3 but near the first locking area 33 and the second locking area 34, if the lock head 4 is in the upper left position of the support base 3, adjust the torque tube 1 to enter the space between the first locking area 33 and the second locking area 34 counterclockwise and then rotate it clockwise in the opposite direction so that the lock head 4 abuts against the second locking area 34; similarly, when the lock head 4 is in the upper right position of the support base 3, adjust the torque tube 1 to enter the space between the first locking area 33 and the second locking area 34 clockwise and then rotate it counterclockwise in the opposite direction so that the lock head 4 abuts against the first locking area 33.

[0039] In addition, at night, the torque tube 1 can be positioned on the support 3 between the first locking area 33 and the second locking area 34, such as near 0° when the tracking bracket is flat, to reduce the rotation angle required for the torque tube 1 to rotate to the first locking area 33 or the second locking area 34, thereby quickly achieving locking protection at night.

[0040] The locking mechanism described above allows the tracking bracket to remain open during normal operation. When strong winds occur, it rotates in the opposite direction to enter the locking state, thereby locking the torque tube 1 to a safe position. This provides wind protection for the entire tracking bracket and improves its wind resistance.

[0041] The following is a detailed implementation description with reference to the accompanying drawings.

[0042] by Figures 1-5For example, a photovoltaic tracking bracket with limit protection function mainly consists of a torque tube 1, a connecting bridge 2, a support base 3, a support arm 31, a lock head 4, a clamp 5, a purlin 6, a first column 7, a column adapter 8, a second column 9, a drive mechanism 10, and a crank 11. The second column 9 is used to install the drive mechanism 10, which is preferably a worm gear reducer with a self-locking function. The support base 3 is fixedly installed on the top of the first column 7 through the column adapter 8. Adjacent torque tubes 1 are fixedly combined through the connecting bridge 2, thus forming a continuous structure in the length direction of the torque tubes 1. The support arm 31 is integrally formed with the support base 3. The second suspension part 35 at the top of the support arm 31 is aligned with the first suspension part 25 on the connecting bridge 2. The connecting bridge 2 is suspended and rotated on the support arm 31 with the help of the rotating shaft. The lock head 4 is rotatably installed at the bottom of the connecting bridge 2. When the drive mechanism 10 drives the torque tube 11, the crank 11 is engaged with the connecting bridge 2. When the torque tube 1 rotates, the torque tube 1 drives the connecting bridge 2 to rotate synchronously on the support arm 31, which in turn drives the lock head 4 to rotate synchronously. During a complete solar tracking cycle of the torque tube 1, the lock head 4 rotates from the outside of the support seat 3 to the support seat 3 and further rotates to the outside of the other side of the support seat 3. When the lock head 4 is on the outside of the support seat 3, the lock head 4 is in a vertical state under the action of gravity. When the lock head 4 contacts the support seat 3, the lock head 4 is in an inclined state. After passing the protruding plate, it falls to the top of the arc plate 32 in a passing state. When it is necessary to enter the first locking state, the torque tube 1 is driven in the opposite direction by the drive mechanism 10.

[0043] In existing technologies, a relatively tall casing is generally used to install the torque tube 1, which is typically taller than the purlin 6. This results in higher costs when installing photovoltaic modules at the top of the first column 7. Therefore, the top of the first column 7 is usually left empty without photovoltaic modules, as shown in the attached drawing of Chinese utility model patent with publication number CN205453610U. Figure 2 As shown, purlin 6 is used to install photovoltaic modules. The photovoltaic modules are evenly fixed to the top of the torque tube 1 by purlin 6. In the vertical direction, the purlin 6 protrudes from the highest point of the connecting cable tray 2, so that the top of the connecting cable tray 2 can also be used to install photovoltaic modules, which effectively improves the space utilization rate of the torque tube 1 at the top of the first column 7 and reduces the overall cost of the photovoltaic tracking bracket.

[0044] by Figures 6-11 For example, it mainly consists of a torque tube 1, a connecting bridge 2, a support seat 3, a support arm 31, a mounting plate 36, a lock head 4, a clamp 5, a purlin 6, a first column 7, a second column 9, a drive mechanism 10, and a crank 11. The support seat 3, the support arm 31, and the mounting plate 36 are integrally formed, and the support seat 3 is fixedly installed on the first column 7 through the mounting plate 36.

[0045] When the connecting cable tray is in the first locking state, specifically as follows: Figure 9As shown, when the connecting cable tray 2 is locked on the first locking area 33 or the second locking area 34, the head area on the lock head 4 is in contact with the first locking area 33 or the second locking area 34, thereby preventing the connecting cable tray 2 from continuing to rotate. By cooperating with the first locking area 33 and the second locking area 34 on the support base 3, the photovoltaic tracking bracket can be locked in a small angle area near zero degrees.

[0046] When the connecting cable tray is in the second locking state, specifically as follows: Figure 10 , Figure 11 As shown, when the connecting bridge 2 rotates to the maximum tilt angle, the torque tube 1 of the photovoltaic tracking bracket also rotates to the maximum tilt angle. The third locking area 23 or the fourth locking area 24 at the end of the slot 21 on the connecting bridge 2 abuts against the support arm 31, thereby preventing the connecting bridge 2 from continuing to rotate, and thus preventing the torque tube 1 from continuing to rotate. By cooperating with the third locking area 23 and the fourth locking area 24 on the connecting bridge 2, the support arm 31 can lock the photovoltaic tracking bracket at the maximum tilt angle, preventing the overall photovoltaic tracking bracket from going beyond the limit position and causing twisting deformation, thereby improving the structural reliability and safety of the overall photovoltaic tracking bracket.

[0047] Furthermore, in actual working conditions, the wind force acts on the photovoltaic modules in an oscillating manner in one direction. Under strong wind conditions, the photovoltaic tracking bracket can flexibly choose to rotate to a large or small angle to limit and lock when the wind is strong. The response time of the tracking bracket rotating from any position to the protection angle is reduced by at least half, effectively reducing the response time of the tracking bracket rotating to the protection angle, thereby improving the overall structural safety and wind resistance of the tracking bracket.

[0048] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A photovoltaic tracking bracket with limit protection function, characterized in that, include: Torque tube (1), adjacent torque tubes (1) form a continuous structure in the length direction through connecting bridge (2); Support base (3), the support base (3) is provided with a first locking area (33) and a second locking area (34), the support base (3) includes a support arm (31), the connecting bridge (2) is rotatably connected to the support arm (31), and the bottom of the connecting bridge (2) is provided with a slot (21) for the support arm (31) to pass through. Lock head (4), the lock head (4) is rotatably mounted on the bottom of the connecting bridge (2), the connecting bridge (2) has a passable state and a first locked state when passing the support seat (3); In the passage state, the lock head (4) passes obliquely through the support base (3); in the first locking state, the lock head (4) is obliquely attached to the first locking area (33) or the second locking area (34) to prevent the connecting bridge (2) from driving the torque tube (1) to continue rotating; the connecting bridge (2) switches between the passage state and the first locking state by rotating in the opposite direction.

2. A photovoltaic tracking bracket with limit protection function according to claim 1, characterized in that, It also includes a drive mechanism (10), which is fixedly connected to a torque tube (1) via a crank (11). The crank (11) has a first connecting end and a second connecting end in the vertical direction. The first connecting end is used to connect to the drive mechanism (10), and the second connecting end is used to connect to the torque tube (1), so that the torque tube (1) is suspended on the drive mechanism (10).

3. A photovoltaic tracking bracket with limit protection function according to claim 1, characterized in that, The end of the support base (3) is provided with a protruding plate, and an arc plate (32) is provided between the protruding plates. The first locking area (33) and the second locking area (34) are set as the corner area formed between the arc plate (32) and the protruding plate.

4. A photovoltaic tracking bracket with limit protection function according to claim 1, characterized in that, A purlin (6) is fixedly installed on the torque tube (1). The purlin (6) is used to install photovoltaic modules. In the vertical direction, the purlin (6) protrudes from the highest point of the connecting bridge (2).

5. A photovoltaic tracking bracket with limit protection function according to claim 1, characterized in that, The support base (3) and the support arm (31) are integrally formed.

6. A photovoltaic tracking bracket with limit protection function according to claim 1, characterized in that, The connecting bridge (2) includes a lower enclosure (22) and an upper connecting part (26). The upper connecting part (26) is disposed on the top of the lower enclosure (22). The lower enclosure (22) and the upper connecting part (26) are integrally formed. The lower enclosure (22) is attached to the torque tube (1). A first suspension part (25) is disposed on the upper connecting part (26). A second suspension part (35) is disposed on the top of the support arm (31). The first suspension part (25) and the second suspension part (35) are rotatably connected by a rotating shaft, so that the connecting bridge (2) is suspended on the support arm (31).

7. A photovoltaic tracking bracket with limit protection function according to claim 6, characterized in that, The lower enclosure (22) has a first ear plate (27) formed at one of its outer ends. The first ear plate (27) uses a clamp (5) to hold the connecting bridge (2) tightly to the outside of the torque tube (1). The bottom of the lower enclosure (22) is provided with a mounting part (28) for installing the lock head (4).

8. A photovoltaic tracking bracket with limit protection function according to claim 6, characterized in that, The connecting bridge (2) has a passable state and a second locking state when rotating around the support arm (31). The slot (21) is opened in the middle of the lower enclosure (22) and distributed in the circumferential direction. The slot (21) forms a third locking area (23) and a fourth locking area (24) between the upper connecting part (26) in the circumferential direction. In the second locking state, the support arm (31) contacts the third locking area (23) or the fourth locking area (24) to prevent the connecting bridge (2) from continuing to rotate, thereby preventing the torque tube (1) from continuing to rotate.

9. A photovoltaic tracking bracket with limit protection function according to any one of claims 1-8, characterized in that, It also includes a first column (7) and a second column (9). The support base (3) is fixedly installed on the top of the first column (7) through the column adapter (8), and the drive mechanism (10) is fixedly installed on the top of the second column (9).

10. A photovoltaic tracking bracket with limit protection function according to any one of claims 1-8, characterized in that, It also includes a first column (7) and a second column (9). The bottom of the support base (3) is fixedly formed with an installation plate (36). The support base (3) is fixedly installed on the top of the first column (7) through the installation plate (36). The drive mechanism (10) is fixedly installed on the top of the second column (9).

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