Main shaft mounting structure of photovoltaic tracking system and photovoltaic tracking system

Abstract

The application discloses a main shaft mounting structure of a photovoltaic tracking system, comprising a main shaft, a bearing matched with the main shaft and a bearing seat sleeved outside the bearing; the main shaft comprises a first main shaft section, a second main shaft section and a connecting structure connecting the first main shaft section and the second main shaft section, the connecting structure comprises a first connecting piece, a second connecting piece and a first fastening assembly, the first connecting piece is connected with the first main shaft section, the second connecting piece is connected with the second main shaft section, the bearing is arranged between the first connecting piece and the second connecting piece, the first connecting piece is connected with one end of the bearing through the first fastening assembly, and the second connecting piece is connected with the other end of the bearing through the first fastening assembly. In this way, the deflection at the connecting position of the first main shaft section and the second main shaft section is reduced. The application further discloses a photovoltaic tracking system.

Description

Technical Field

[0001] This invention relates to a spindle mounting structure for a photovoltaic tracking system and the photovoltaic tracking system itself, belonging to the field of photovoltaic technology. Background Technology

[0002] A photovoltaic (PV) tracking bracket includes a main beam, multiple columns supporting the main beam, and a drive mechanism that rotates the main beam. PV modules are mounted on the main beam, and the angle of the PV modules can be adjusted by rotating the main beam via the drive mechanism. Due to the considerable length of the main beam, multiple main beam segments are typically provided initially. Adjacent segments are connected by main beam connectors, and these connectors combine to form the main beam. However, the connection points can lead to significant deflection, affecting the structural safety, stability, and long-term reliability of the entire PV array. Summary of the Invention

[0003] The purpose of this invention is to provide a spindle mounting structure and a photovoltaic tracking system that can reduce deflection problems caused by spindle connection points.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A main shaft mounting structure for a photovoltaic tracking system includes a main shaft, a bearing that mates with the main shaft, and a bearing housing sleeved outside the bearing.

[0006] The spindle includes a first spindle segment, a second spindle segment, and a connecting structure connecting the first spindle segment and the second spindle segment. The connecting structure includes a first connector, a second connector, and a first fastening assembly. The first connector is connected to the first spindle segment, and the second connector is connected to the second spindle segment. At least a portion of the bearing is disposed between the first connector and the second connector. The first connector is connected to one end of the bearing through the first fastening assembly, and the second connector is connected to the other end of the bearing through the first fastening assembly.

[0007] As a further improved technical solution of the present invention, the first connecting member includes a first connecting plate connected to the first spindle segment, the first connecting plate having a plurality of first through holes, the second connecting member includes a second connecting plate connected to the second spindle segment, the second connecting plate having a plurality of second through holes, the bearing having a plurality of third through holes, and the first fastening component passing through the first through holes, the second through holes and the third through holes.

[0008] As a further improved technical solution of the present invention, the bearing has a mounting cavity, and the spindle includes a first end and a second end, the first end extending out of the first connecting plate and into the mounting cavity, and the second end extending out of the second connecting plate and into the mounting cavity.

[0009] As a further improvement of the present invention, the first spindle segment includes a first end portion, and the second spindle segment includes a second end portion;

[0010] The first connecting plate is welded and fixed to the first spindle section, and the second connecting plate is welded and fixed to the second spindle section.

[0011] As a further improved technical solution of the present invention, the first connecting member includes a first sleeve connected to the first connecting plate, the second connecting member includes a second sleeve connected to the second connecting plate, the first sleeve is sleeved on the outer periphery of the first spindle segment and connected to the first spindle segment through a second fastening component, and the second sleeve is sleeved on the outer periphery of the second spindle segment and connected to the second spindle segment through a third fastening component.

[0012] As a further improvement of the present invention, the first sleeve includes a first end and the second sleeve includes a second end; or, the first spindle segment includes a first end and the second spindle segment includes a second end.

[0013] As a further improvement of the present invention, the bearing is provided with a first shoulder and a second shoulder at both ends along the axial direction, and the first shoulder and the second shoulder cooperate to abut against both sides of the bearing seat.

[0014] As a further improved technical solution of the present invention, the outer diameters of the first connecting plate and the second connecting plate are both larger than the outer diameter of the bearing. The portion of the first connecting plate that extends radially beyond the bearing forms a first stop, and the portion of the second connecting plate that extends radially beyond the bearing forms a second stop. The bearing seat is located between the first stop and the second stop.

[0015] As a further improved technical solution of the present invention, the bearing includes a first bearing section and a second bearing section that are separately arranged, the first shoulder is provided in the first bearing section, and the second shoulder is provided in the second bearing section.

[0016] To achieve the above objectives, the present invention adopts the following technical solution:

[0017] A photovoltaic tracking system includes a column and a main shaft mounting structure for the photovoltaic tracking system, wherein the main shaft mounting structure is disposed on the column.

[0018] The photovoltaic tracking system spindle mounting structure provided by the present invention includes a spindle, a bearing, a bearing housing, and a connecting structure. The connecting structure includes a first connector, a second connector, and a first fastening assembly. The first connector is connected to a first spindle segment, and the second connector is connected to a second spindle segment. The first fastening assembly passes through the first connector, the second connector, and the bearing to achieve the connection of the first connector, the second connector, and the bearing. Since the bearing housing is fixed to the top of the column, the top of the column provides support for the connecting structure and the bearing, reducing the deflection at the connection between the first spindle segment and the second spindle segment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the spindle mounting structure of the present invention in a first embodiment;

[0020] Figure 2 yes Figure 1 A three-dimensional sectional view of the spindle mounting structure shown.

[0021] Figure 3 yes Figure 1 An exploded view of the spindle mounting structure shown.

[0022] Figure 4 yes Figure 1 A three-dimensional schematic diagram of the spindle mounting structure from another angle;

[0023] Figure 5 yes Figure 4 An exploded view of the spindle mounting structure shown.

[0024] Figure 6 This is a three-dimensional schematic diagram of the spindle mounting structure of the present invention in a second embodiment;

[0025] Figure 7 yes Figure 6 An exploded view of the spindle mounting structure shown.

[0026] Figure 8 yes Figure 7 A detailed exploded view of the spindle mounting structure shown.

[0027] Figure 9 yes Figure 8 A detailed exploded view of the spindle mounting structure from another angle;

[0028] Figure 10 yes Figure 6 Assembly diagram of the intermediate bearing, the first connecting part and the second connecting part. Detailed Implementation

[0029] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. If several embodiments exist, features in these embodiments may be combined with each other without conflict. When the description refers to the drawings, unless otherwise stated, the same numbers in different drawings represent the same or similar elements. The descriptions in the following exemplary embodiments do not represent all embodiments consistent with the present invention; rather, they are merely examples of apparatuses, products, and / or methods consistent with some aspects of the present invention as set forth in the claims.

[0030] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of protection of this invention. The singular forms “a,” “the,” or “the” as used in the specification and claims of this invention are also intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should be understood that the terms "first," "second," and similar words used in the specification and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish features. Similarly, the terms "an" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise stated, the terms "before," "after," "upper," "lower," and similar words appearing in this invention are for ease of explanation only and are not limited to a specific location or spatial orientation. The terms "comprising" or "including" are an open-ended expression, meaning that the element preceding "comprising" or "including" encompasses the element following "comprising" or "including" and its equivalents, but this does not preclude the element preceding "comprising" or "including" from also including other elements. In this invention, the term "several" means two or more.

[0032] According to the first embodiment of the main shaft mounting structure of the photovoltaic tracking system of the present invention, please refer to... Figures 1 to 5 As shown, the main shaft mounting structure of the photovoltaic tracking system includes a main shaft 10, a bearing 4 that mates with the main shaft 10, and a bearing housing 5 fitted over the bearing 4. The main shaft 10 and the bearing 4 are fixedly connected, allowing the main shaft 10 and the bearing 4 to rotate synchronously relative to the bearing housing 5, thereby enabling synchronous adjustment of the angle of the photovoltaic module.

[0033] Spindle 10 is typically composed of several connected spindle segments. The number of spindle segments can be adjusted to suit different application scenarios. Please refer to [reference needed]. Figure 1 As shown, the spindle 10 includes an adjacent first spindle segment 1 and a second spindle segment 2, as well as a connecting structure 3 connecting the first spindle segment 1 and the second spindle segment 2. The first spindle segment 1 and the second spindle segment 2 can be square tubes, but are not limited to square tubes.

[0034] Please refer to Figure 2 As shown, the connection structure 3 includes a first connector 31, a second connector 32, and a first fastening assembly 33. The first connector 31 is connected to the first main shaft segment 1, and the second connector 32 is connected to the second main shaft segment 2. Along the length of the main shaft 10, at least a portion of the bearing 4 is disposed between the first connector 31 and the second connector 32. The first connector 31 is connected to one end of the bearing 4 through the first fastening assembly 33, and the second connector 32 is connected to the other end of the bearing 4 through the first fastening assembly 33, thereby fixing the first connector 31, the second connector 32, and the bearing 4 together, thus fixing the adjacent first main shaft segment 1 and second main shaft segment 2 to both sides of the bearing 4 respectively. Since the bearing seat 5 is fixed to the top of the column through the column top seat, the column supports the connection structure 3 and the bearing 4, which can reduce the deflection at the connection between the first main shaft segment 1 and the second main shaft segment 2, thereby reducing the risk of breakage or collapse at the connection and improving the structural safety, stability, and long-term reliability of the entire photovoltaic tracking system. This configuration, by fixing adjacent first spindle segments 1 and second spindle segments 2 to both sides of the bearing 4, allows for the fixed connection of several spindle segments into a single unit while reducing deflection issues caused by the connection nodes. Furthermore, the first fastening component 33 passes through the first connector 31, the second connector 32, and the bearing 4 simultaneously, ensuring high synchronization of the rotation of the first spindle segment 1, the second spindle segment 2, and the bearing 4 when adjusting the photovoltaic module angle.

[0035] Please refer to Figure 3 As shown, the first connecting member 31 includes a first connecting plate 311 connected to the first spindle segment 1, and the first connecting plate 311 has a plurality of first through holes 310. The second connecting member 32 includes a second connecting plate 321 connected to the second spindle segment 2, and the second connecting plate 321 has a plurality of second through holes 320. The bearing 4 has a plurality of third through holes 401, and the first through holes 310, the second through holes 320 and the third through holes 401 are axially corresponding. The first fastening component 33 passes through the first through holes 310, the second through holes 320 and the third through holes 401 to fix the first spindle segment 1 and the second spindle segment 2 to the bearing 4. In the embodiment illustrated in the present invention, the first connecting plate 311 and the second connecting plate 321 are both disc-shaped, and the plurality of first through holes 310 are evenly arranged in the circumferential direction of the first connecting plate 311, and the plurality of second through holes 320 are evenly arranged in the circumferential direction of the second connecting plate 321.

[0036] In some embodiments, a first connecting plate 311 is sleeved on the outer periphery of the first spindle segment 1, and the first connecting plate 311 is welded and fixed to the first spindle segment 1 to achieve a stable connection between the first connecting plate 311 and the first spindle segment 1. A second connecting plate 321 is sleeved on the outer periphery of the second spindle segment 2, and the second connecting plate 321 is welded and fixed to the second spindle segment 2 to achieve a stable connection between the second connecting plate 321 and the second spindle segment 2.

[0037] For details, please refer to Figure 5 As shown, the first fastening assembly 33 includes a first bolt 331 and a first nut 332. The first bolt 331 passes through the first through hole 310, the second through hole 320 and the third through hole 401 and is fastened to the first nut 332 to achieve a fixed connection between the first connector 31, the second connector 32 and the bearing 4.

[0038] Please refer to Figure 2 As shown, bearing 4 has a mounting cavity 402, which axially extends through bearing 4. Please refer to... Figure 3 As shown, the spindle 10 includes a first end 101 and a second end 102. The first end 101 extends out of the first connecting plate 311 and into the mounting cavity 402, and the second end 102 extends out of the second connecting plate 321 and into the mounting cavity 402. By having the first end 101 and the second end 102 extend into the mounting cavity 402 from both sides of the bearing 4, the bearing housing 5 can simultaneously support the bearing 4 and the spindle 10 extending into it, thereby reducing the lateral force on the bearing 4 and further enhancing the torque and bending strength at the connection between the spindle 10 and the bearing 4.

[0039] Specifically, the mounting cavity 402 is adapted to the first end 101 and the second end 102. The first end 101 fits against the cavity wall of the mounting cavity 402, and the second end 102 fits against the cavity wall of the mounting cavity 402, which is beneficial for the first spindle section 1 and the second spindle section 2 to maintain coaxiality.

[0040] Specifically, the first spindle segment 1 includes a first end 101, meaning the first end 101 is a part of the first spindle segment 1. The second spindle segment 2 includes a second end 102, meaning the second end 102 is a part of the second spindle segment 2. Bearing 4 extends through the first end 101 and the second end 102. Bearing 4 connects the first spindle segment 1 and the second spindle segment 2 while simultaneously supporting both, further reducing the deflection at the ends of the first spindle segment 1 and the second spindle segment 2.

[0041] In some implementation methods, please refer to Figure 3As shown, the bearing 4 has a first shoulder 431 and a second shoulder 432 at its two ends in the axial direction. Both the first shoulder 431 and the second shoulder 432 protrude radially from the outer peripheral wall of the bearing 4. The first shoulder 431 and the second shoulder 432 cooperate to abut against the two sides of the bearing seat 5 to stably fix the bearing 4 on the bearing seat 5 and prevent the bearing 4 from moving out axially during operation. The bearing 4 is cylindrical, and the outer diameter of the bearing 4 is equal to the outer diameter of the first connecting plate 311 and the second connecting plate 321. In other possible embodiments, the outer diameters of the first connecting plate 311 and the second connecting plate 321 are both larger than the outer diameter of the bearing 4, such that the radial portion of the first connecting plate 311 extending beyond the bearing 4 forms a first stop, and the radial portion of the second connecting plate 321 extending beyond the bearing 4 forms a second stop. The bearing seat 5 is located between the first stop and the second stop. By increasing the size of the first connecting plate 311 and the second connecting plate 321, the bearing housing 5 is limited, the shoulder on the bearing 4 can be eliminated, the structure and manufacturing process of the bearing 4 can be simplified, and the cost can be reduced.

[0042] In some embodiments, the first shoulder 431 and the second shoulder 432 are both fixedly connected to the bearing 4, and the bearing 4 is a split structure so that the bearing 4 can be installed on the bearing seat 5.

[0043] In other possible implementations, the bearing 4 is integral, and at least one of the first shoulder 431 and the second shoulder 432 is detachably connected to the bearing 4 (e.g., by screw fixing or snap connection) so that the bearing 4 can be installed in the bearing housing 5.

[0044] Bearing 4 is preferably designed with a split structure, which makes disassembly and assembly easier compared to a one-piece bearing. For details, please refer to... Figure 3 and Figure 5As shown, bearing 4 includes a first bearing section 41 and a second bearing section 42, which are separately arranged. A first shoulder 431 is provided in the first bearing section 41, and a second shoulder 432 is provided in the second bearing section 42. The first bearing section 41 has a first mounting cavity 4021, and a first end 101 extends into the first mounting cavity 4021. The second bearing section 42 has a second mounting cavity 4022, and a second end 102 extends into the second mounting cavity 4022. The mounting cavity 402 is composed of the first mounting cavity 4021 and the second mounting cavity 4022. During assembly, the first bearing section 41 can be assembled with the first spindle section 1, and the second bearing section 42 can be assembled with the second spindle section 2. Then, the first bearing section 41 and the second bearing section 42 are connected by the first fastening assembly 33. After assembly, the first shoulder 431 and the second shoulder 432 respectively abut against the two sides of the bearing housing 5 in the axial direction. The first bearing section 41 abuts against the first connecting plate 311, and the second bearing section 42 abuts against the second connecting plate 321. There is a gap between the first end 101 and the second end 102, so that the first end 101 and the second end 102 do not interfere with each other. By setting the bearing 4 as a split structure, it is convenient to assemble the first spindle section 1, the second spindle section 2, and the bearing 4.

[0045] For details, please refer to Figure 3 and Figure 5 As shown, the first shoulder 431 protrudes from the end of the first bearing section 41 away from the second bearing section 42, and the second shoulder 432 protrudes from the end of the second bearing section 42 away from the first bearing section 41.

[0046] Please refer to Figure 3 As shown, the bearing housing 5 includes a main body 51 and a base 52 connected to the main body 51. The main body 51 has a cavity 510 for receiving the bearing 4. The base 52 is provided with a mounting hole 520 for connecting with a column top seat.

[0047] For a second embodiment of the spindle mounting structure of the photovoltaic tracking system according to the present invention, please refer to... Figures 6 to 10 As shown, the difference from the first embodiment is that: the first connecting member 31 includes a first sleeve 312 connected to the first connecting plate 311, and the second connecting member 32 includes a second sleeve 322 connected to the second connecting plate 321. The first sleeve 312 is fitted onto the outer periphery of the first spindle segment 1 and connected to the first spindle segment 1 through a second fastening assembly 34. The second sleeve 322 is fitted onto the outer periphery of the second spindle segment 2 and connected to the second spindle segment 2 through a third fastening assembly 35. The first connecting plate 311 and the second connecting plate 321 are bolted to the spindle 10, increasing the connection strength between the first spindle segment 1, the second spindle segment 2, and the bearing 4. By fitting the first sleeve 312 onto the outer periphery of the end of the first spindle segment 1 and the second sleeve 322 onto the outer periphery of the end of the second spindle segment 2, a local thickening of the spindle 10 is achieved.

[0048] In some embodiments, a first connecting plate 311 is sleeved on the outer periphery of a first sleeve 312, with both ends of the first sleeve 312 extending beyond the first connecting plate 311. A second connecting plate 321 is sleeved on the outer periphery of a second sleeve 322, with both ends of the second sleeve 322 extending beyond the second connecting plate 321. For details, please refer to... Figure 8 and Figure 9 As shown, the first sleeve 312 includes a first part and a second part 3122, which are located on both sides of the first connecting plate 311, respectively. The second sleeve 322 includes a third part and a fourth part 3222, which are located on both sides of the second connecting plate 321, respectively. The first part is a first end 101, and the third part is a second end 102. The second part 3122 is connected to the first spindle segment 1 via a second fastening assembly 34, and the fourth part 3222 is connected to the second spindle segment 2 via a third fastening assembly 35. In other possible embodiments, one end of the first sleeve 312 abuts against the first connecting plate 311, and one end of the second sleeve 322 abuts against the second connecting plate 321. A portion of the first spindle segment 1 extends out of the first connecting plate 311 and forms the first end 101, and a portion of the second spindle segment 2 extends out of the second connecting plate 321 and forms the second end 102.

[0049] The first connecting plate 311 is welded and fixed to the first sleeve 312, achieving a stable connection between the two. The second connecting plate 321 is welded and fixed to the second sleeve 322, achieving a stable connection between the two.

[0050] In some implementation methods, please refer to Figure 10 As shown, the outer diameters of both the first connecting plate 311 and the second connecting plate 321 are larger than the outer diameter of the bearing 4, such that the portion of the first connecting plate 311 radially extending beyond the bearing 4 forms a first stop 3111, and the portion of the second connecting plate 321 radially extending beyond the bearing 4 forms a second stop 3211. The bearing seat 5 is located between the first stop 3111 and the second stop 3211. By increasing the dimensions of the first connecting plate 311 and the second connecting plate 321, the bearing seat 5 is limited, eliminating the need for a shoulder on the bearing 4, simplifying the structure and manufacturing process of the bearing 4, and reducing costs. In other possible embodiments, the bearing 4 is provided with a first shoulder and a second shoulder to limit the bearing seat 5.

[0051] In some implementation methods, please refer to Figure 7 As shown, the bearing 4 is a single piece, and it has a plurality of weight-reducing holes 403, which are evenly arranged in the circumferential direction of the bearing 4. In other possible embodiments, the bearing 4 can be disposed separately.

[0052] Please refer to Figure 9As shown, the second fastening assembly 34 includes a second bolt 341 and a second nut 342. The second bolt 341 passes through the first sleeve 312 and the first spindle section 1 and is fixed with the second nut 342. The second bolts 341 are installed on different sides of the first sleeve 312, and the two second bolts 341 on adjacent sides are perpendicular to each other. This arrangement achieves a stable connection between the first sleeve 312 and the first spindle section 1.

[0053] Please refer to Figure 9 As shown, the third fastening assembly 35 includes a third bolt 351 and a third nut 352. The third bolt 351 passes through the second sleeve 322 and the second spindle section 2 and is fixed with the third nut 352. The third bolts 351 are installed on different sides of the second sleeve 322, and the two third bolts 351 on adjacent sides are perpendicular to each other. This arrangement achieves a stable connection between the second sleeve 322 and the second spindle section 2.

[0054] The present invention also discloses a photovoltaic tracking system, including a column and a main shaft mounting structure of the photovoltaic tracking system, wherein the main shaft mounting structure is disposed on the column.

[0055] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of the present invention should be based on those skilled in the art. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A spindle mounting structure for a photovoltaic tracking system, characterized in that, Includes a main shaft (10), a bearing (4) that cooperates with the main shaft (10), and a bearing housing (5) sleeved outside the bearing (4); The spindle (10) includes a first spindle segment (1), a second spindle segment (2), and a connecting structure (3) connecting the first spindle segment (1) and the second spindle segment (2). The connecting structure (3) includes a first connector (31), a second connector (32), and a first fastening assembly (33). The first connector (31) is fixedly connected to the first spindle segment (1), and the second connector (32) is fixedly connected to the second spindle segment (2). At least part of the bearing (4) is disposed between the first connector (31) and the second connector (32). The first connector (31) is connected to one end of the bearing (4) through the first fastening assembly (33), and the second connector (32) is connected to the other end of the bearing (4) through the first fastening assembly (33), so as to realize the fixed connection of the first connector (31), the second connector (32), and the bearing (4). The bearing (4) has a mounting cavity (402), the first spindle section (1) extends out of the first connector (31) and into the mounting cavity (402), the second spindle section (2) extends out of the second connector (32) and into the mounting cavity (402), and both the first spindle section (1) and the second spindle section (2) are in contact with the cavity wall of the mounting cavity (402).

2. The main shaft mounting structure of the photovoltaic tracking system as described in claim 1, characterized in that, The first connector (31) includes a first connecting plate (311) connected to the first spindle segment (1), the first connecting plate (311) having a plurality of first through holes (310), the second connector (32) includes a second connecting plate (321) connected to the second spindle segment (2), the second connecting plate (321) having a plurality of second through holes (320), the bearing (4) having a plurality of third through holes (401), and the first fastening component (33) passing through the first through holes (310), the second through holes (320) and the third through holes (401).

3. The main shaft mounting structure of the photovoltaic tracking system as described in claim 2, characterized in that, The first connecting plate (311) is welded and fixed to the first spindle section (1), and the second connecting plate (321) is welded and fixed to the second spindle section (2).

4. The main shaft mounting structure of the photovoltaic tracking system as described in claim 2, characterized in that, The first connector (31) includes a first sleeve (312) connected to the first connecting plate (311), and the second connector (32) includes a second sleeve (322) connected to the second connecting plate (321). The first sleeve (312) is sleeved on the outer periphery of the first spindle segment (1) and connected to the first spindle segment (1) through a second fastening assembly (34). The second sleeve (322) is sleeved on the outer periphery of the second spindle segment (2) and connected to the second spindle segment (2) through a third fastening assembly (35).

5. The main shaft mounting structure of the photovoltaic tracking system as described in claim 2, characterized in that, The first spindle segment (1) includes a first end (101), and the second spindle segment (2) includes a second end (102). The first end (101) extends out of the first connecting plate (311) and into the mounting cavity (402), and the second end (102) extends out of the second connecting plate (321) and into the mounting cavity (402).

6. The spindle mounting structure of the photovoltaic tracking system as described in claim 3 or 4, characterized in that, The bearing (4) is provided with a first shoulder (431) and a second shoulder (432) at both ends along the axial direction. The first shoulder (431) and the second shoulder (432) cooperate to abut against both sides of the bearing seat (5).

7. The spindle mounting structure of the photovoltaic tracking system as described in claim 3 or 4, characterized in that, The outer diameters of the first connecting plate (311) and the second connecting plate (321) are both larger than the outer diameter of the bearing (4). The portion of the first connecting plate (311) that extends radially beyond the bearing (4) forms a first stop (3111), and the portion of the second connecting plate (321) that extends radially beyond the bearing (4) forms a second stop (3211). The bearing seat (5) is located between the first stop (3111) and the second stop (3211).

8. The spindle mounting structure of the photovoltaic tracking system as described in claim 6, characterized in that, The bearing (4) includes a first bearing section (41) and a second bearing section (42) that are separately arranged. The first shoulder (431) is located on the first bearing section (41), and the second shoulder (432) is located on the second bearing section (42).

9. A photovoltaic tracking system, characterized in that, It includes a column and a main shaft mounting structure for a photovoltaic tracking system as described in any one of claims 1 to 8, wherein the main shaft mounting structure is disposed on the column.

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