Main shaft of photovoltaic support

Abstract

The utility model relates to a main shaft of a photovoltaic support, the main shaft comprises a main shaft body and reinforcing ribs, the main shaft body is arranged to be in a cylindrical shape with a through hollow part inside, the number of the reinforcing ribs is multiple, the multiple reinforcing ribs are arranged on the inner wall of the main shaft body, and the multiple reinforcing ribs are arranged in the circumferential direction of the axis of the main shaft at equal intervals. According to the technical scheme, the reinforcing ribs are arranged in the main shaft, so that the rigidity of the main shaft is improved, the deformation of the main shaft under the action of external force is reduced, the shape stability of the main shaft retaining structure is improved, and the bearing capacity of the main shaft retaining structure is improved on the premise of not influencing the external size of the main shaft; and the main shaft is prevented from being broken or damaged in an area with relatively large stress. The overall stability of the photovoltaic support can be enhanced, the safety and normal work of the photovoltaic panel under the severe weather condition can be ensured, the resistance of the main shaft to environmental factors can be improved, the service life can be prolonged, and the reasonable design of the reinforcing ribs is beneficial to optimization of material use, reduction of cost and improvement of economic benefits.

Description

Technical Field

[0001] This disclosure relates to the technical field of photovoltaics, and more specifically, to a main shaft for a photovoltaic support. Background Technology

[0002] In adjustable and tracking photovoltaic (PV) mounting systems, the main shaft is a crucial structural component. Its function is to directly bear the wind load transmitted from the PV modules and transfer it to the columns and foundation. The size of the main shaft's cross-section depends on the actual wind load, column span spacing, and module arrangement. Currently, most PV mounting system manufacturers use a through-hole connection between the main shaft and the columns. This method is advantageous for its simple installation and clear force distribution, but its disadvantage is that the main shaft size is closely related to the polymer bearings, movable wall clamps, and column top sleeves. The main shaft size cannot be significantly increased, otherwise it will not be compatible with these three components. This limits the application of the main shaft in high-wind projects. In many projects with large wind loads (such as coastal typhoon areas), the main shaft's strength cannot meet the requirements, failing verification calculations, or requiring a significant increase in main shaft cost. Utility Model Content

[0003] The purpose of this disclosure is to provide a main shaft for a photovoltaic bracket to at least partially solve the technical problems existing in the related art.

[0004] To achieve the above objectives, this application provides a main shaft for a photovoltaic support, including a main shaft body and reinforcing ribs;

[0005] The main shaft body is configured as a cylinder with a through hollow section inside;

[0006] The number of reinforcing ribs is multiple, and the multiple reinforcing ribs are arranged on the inner wall of the main shaft body;

[0007] The reinforcing ribs are arranged circumferentially at equal intervals around the axis of the main shaft.

[0008] Optionally, the reinforcing rib is plate-shaped and extends radially toward the axis of the main shaft.

[0009] Optionally, the reinforcing rib is spaced apart from the axis.

[0010] Optionally, the thickness D2 of the main shaft body is greater than or equal to the thickness D1 of the reinforcing rib.

[0011] Optionally, the thickness D2 of the main shaft body is 2.2mm~2.7mm, and the thickness D1 of the reinforcing rib is 1.5mm~2.7mm.

[0012] Optionally, the length of the reinforcing rib along the axial direction of the main shaft is not less than 1 / 3 of the length of the main shaft.

[0013] Optionally, the main shaft is provided with the reinforcing rib at least at the middle position of its own axial direction.

[0014] Optionally, the axial cross-section of the spindle body is square, elliptical, or octagonal;

[0015] Four reinforcing ribs are provided, and the four reinforcing ribs are arranged at equal intervals along the circumferential direction of the axial section.

[0016] Optionally, both the main shaft body and the reinforcing rib are made of zinc-aluminum-magnesium alloy steel.

[0017] Optionally, the plurality of the reinforcing ribs are integrally formed with the main shaft body.

[0018] By using the above technical solution, reinforcing ribs can be set inside the spindle to improve its strength without affecting the external dimensions of the spindle or the components it is paired with. Furthermore, by setting reinforcing ribs according to the strength requirements of the spindle, the spindle can be strengthened while saving costs and reducing expenses.

[0019] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a cross-sectional view of the main shaft of a photovoltaic support provided in an exemplary embodiment of this disclosure;

[0022] Figure 2 This is a cross-sectional view of the main shaft of a photovoltaic support provided in another exemplary embodiment of this disclosure;

[0023] Figure 3 This is a cross-sectional view of the main shaft of a photovoltaic support provided in yet another exemplary embodiment of this disclosure;

[0024] Figure 4 This is a side view of the main shaft of a photovoltaic bracket provided in an exemplary embodiment of this disclosure.

[0025] Explanation of reference numerals in the attached figures

[0026] 10. Main spindle; 11. Main spindle body; 12. Inner wall; 13. Axis; 14. Hollow part; 20. Reinforcing rib. Detailed Implementation

[0027] The specific embodiments of this disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0028] In the description of this disclosure, it should be understood that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the drawing orientation shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational construction and operation, and therefore should not be construed as a limitation of this disclosure.

[0029] In this disclosure, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Furthermore, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0030] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0031] In related technologies, the main shaft of a photovoltaic (PV) mounting system is a key component. Its primary function is to act as a center of rotation, allowing the PV panels to follow the sun's position and maximize solar energy absorption efficiency. By adjusting the angle or orientation of the PV panels, the main shaft helps ensure that the panels are directly exposed to sunlight for longer periods, especially from sunrise to sunset, thus significantly improving the overall efficiency of the PV power generation system. Therefore, the design of the main shaft must consider factors such as strength and durability to guarantee the long-term stable operation of the system.

[0032] The main shaft of existing photovoltaic brackets is generally connected to components such as support columns, polymer bearings, movable wall clamps, and column top sleeves to form a complete photovoltaic bracket. Since the above-mentioned components are connected to the main shaft, the external dimensions of the main shaft need to be matched with each component. That is, the external dimensions of the main shaft are fixed, making it difficult to improve the strength and rigidity of the main shaft.

[0033] In view of this, this application provides a main shaft 10 for a photovoltaic bracket, such as Figures 1 to 4As shown, it includes a main shaft body 11 and reinforcing ribs 20. The main shaft body 11 is configured as a cylinder with a through hollow part 14 inside. There are multiple reinforcing ribs 20, which are arranged on the inner wall 12 of the main shaft body 11. The multiple reinforcing ribs 20 are arranged equidistantly around the axis 13 of the main shaft 10.

[0034] By using the above technical solution, reinforcing ribs 20 are provided inside the spindle 10, which can improve the strength of the spindle 10 without affecting its external dimensions, that is, without affecting the components that are matched with the spindle 10. Furthermore, by providing reinforcing ribs 20 according to the strength requirements of the spindle 10, the cost can be reduced while strengthening the spindle 10.

[0035] In this application, a reinforcing rib 20 is provided inside the main shaft 10. This does not affect the external dimensions of the main shaft 10, ensuring that the main shaft 10 can be connected to components such as the support column, polymer bearing, movable wall clamp, and column top sleeve without requiring the design of new matching components, thus reducing design costs. Furthermore, the reinforcing rib 20 is located inside the main shaft 10, which also provides protection for the reinforcing rib 20 itself.

[0036] In the photovoltaic support design disclosed herein, the reinforcing rib 20 is disposed within the main shaft 10, which improves the rigidity of the main shaft 10, reduces the deformation of the main shaft 10 under external forces, enhances the structural shape stability of the main shaft 10 and improves its load-bearing capacity, and also enhances the local strength of the main shaft 10, preventing breakage or damage in areas of high stress. The increased strength and rigidity of the main shaft 10 enhances the overall stability of the photovoltaic support, ensuring the safety and normal operation of the photovoltaic panels under harsh weather conditions (such as strong winds and blizzards), and improves the resistance of the main shaft 10 to environmental factors (such as temperature changes and corrosion), extending its service life. Furthermore, the rational design of the reinforcing rib 20 also helps optimize material usage, reduce costs, and improve economic efficiency.

[0037] In this disclosure, such as Figures 1 to 4 As shown, the reinforcing rib 20 can be plate-shaped, and extends radially toward the axis 13 of the main shaft 10. Thus, the plate-shaped reinforcing rib 20 can significantly improve the wind resistance and load-bearing capacity of the photovoltaic support, ensuring the stability and safety of the photovoltaic panels under various weather conditions. Simultaneously, through optimized design, lightweighting and cost control can be achieved, improving the economy and reliability of the entire photovoltaic system.

[0038] Understandably, the plate-shaped reinforcing ribs 20 help improve the bending stiffness of the main shaft 10, reduce its deformation under stress, and maintain structural stability. They also help distribute stress, evenly distributing concentrated loads over a larger area, reducing localized stress concentration, and thus improving the overall durability of the structure. Furthermore, a well-designed plate-shaped reinforcing rib 20 can reduce material usage while maintaining the strength and stiffness of the main shaft 10, thereby reducing overall weight and cost. It also improves the stability of the main shaft 10, reducing resonance and vibration amplitude under dynamic loads or vibration environments, and ultimately enhancing the safety of the photovoltaic support structure.

[0039] In addition, the plate-shaped reinforcing ribs 20 can usually be easily installed by stamping, welding or bonding, and the manufacturing process is relatively simple and the cost is low.

[0040] In this disclosure, the reinforcing ribs 20 inside the spindle 10 can be set as any suitable structure, as long as they can meet the load-bearing capacity requirements of the spindle 10, such as... Figures 1 to 4 As shown, there can be a gap between the reinforcing rib 20 and the axis 13. In this way, material can be saved and costs reduced while meeting the strength and stiffness requirements of the main shaft 10.

[0041] In this disclosure, such as Figure 1 As shown, the thickness D2 of the spindle body 11 is greater than or equal to the thickness D1 of the reinforcing rib 20. This arrangement ensures the reinforcing effect of the reinforcing rib 20, and the smaller thickness of the reinforcing rib 20 reduces the amount of material used, thus lowering material costs.

[0042] In some other embodiments, since the reinforcing ribs 20 are arranged in the hollow portion 14 of the main shaft 10, the space is small, and the thinner reinforcing ribs 20 are easier to modify and adjust, improving the adaptability and flexibility of the design.

[0043] In this disclosure, the thickness D2 of the main shaft body 11 can be 2.2mm to 2.7mm, and the thickness D1 of the reinforcing rib 20 can be 1.5mm to 2.7mm. This reasonable design of the reinforcing rib 20 ensures that it effectively strengthens the structure. In photovoltaic brackets, a thinner reinforcing rib 20 can reduce the overall weight, improve the convenience of installation and transportation, and reduce material costs.

[0044] For example, when the thicknesses D2 and D1 are the same, the stress distribution on the main shaft 10 is more uniform, reducing the risk of local stress concentration, which helps to improve the stability and durability of the photovoltaic support and improves the deformation consistency of the main shaft 10. That is, when subjected to external force, the stiffener 20 and the main shaft body 11 will deform together, reducing local deformation caused by thickness differences, thereby improving the overall stiffness and strength of the main shaft 10.

[0045] In this disclosure, the length of the stiffener 20 along the axis 13 of the main shaft 10 can be no less than 1 / 3 of the length of the main shaft 10. This arrangement allows the longer stiffener 20 to cover a larger area, improving local stiffness and reducing local deformation.

[0046] Among them, the longer reinforcing ribs 20 can distribute concentrated loads more evenly over a larger area, reduce local stress concentration, improve the overall strength of the main shaft 10, help prevent crack propagation, and improve the crack resistance of the main shaft 10. They also improve the torsional resistance of the main shaft 10, reduce deformation under torsional loads, and improve the stability of the main shaft 10. Finally, they enhance the wind resistance of photovoltaic brackets used outdoors, ensuring stability under strong wind conditions.

[0047] In this disclosure, the spindle 10 is provided with a reinforcing rib 20 at least at its midpoint along its axial direction. This arrangement ensures the load-bearing capacity of the midpoint of the spindle 10, as the torque of the spindle 10 is greatest in this region. By rationally designing the reinforcing rib 20, the amount of material used can be reduced while ensuring the strength and rigidity of the spindle 10, thereby reducing the overall weight. In other words, by providing reinforcing ribs 20 in key areas, the local strength of the spindle 10 can be improved, preventing cracks or fractures in high-stress areas.

[0048] In this disclosure, such as Figures 1 to 3 As shown, the axial cross-section of the main spindle body 11 can be square, elliptical, or octagonal. Four reinforcing ribs 20 are provided, and the four reinforcing ribs 20 are arranged at equal intervals along the circumference of the axial cross-section. By rationally designing the reinforcing ribs 20, the strength and rigidity of the main spindle 10 can be guaranteed. The uniformly arranged reinforcing ribs 20 can effectively disperse stress, reduce the risk of local stress concentration, and improve the durability of the main spindle 10.

[0049] Based on experimental data: the moment of inertia of the square tubular spindle without reinforcing ribs is 270.49 / cm. 4 The flexural modulus of the section without reinforcing ribs is 45.08 / cm². 3 Assume the moment of inertia of the stiffener section is 289.47 / cm. 4 Assume the flexural modulus of the reinforcing rib section is 48.2 / cm². 3 The section moment of inertia increased by 7%, the section bending modulus increased by 6.9%, the weight increased by 65.52 kg, and the weight increased by 2.34 kg / m per meter;

[0050] The moment of inertia of the elliptical principal shaft section without stiffeners is 177.97 / cm. 4 The flexural modulus of the section without reinforcement is 31.22 / cm². 3 Assume the moment of inertia of the stiffener section is 193.86 / cm. 4 Assume the flexural modulus of the reinforcing rib section is 34.0 L / cm². 3 The section moment of inertia increased by 8.9%, the section bending modulus increased by 8.9%, the weight increased by 54.41 kg, and the weight increased by 7.87 kg / m per meter;

[0051] The moment of inertia of the square tubular spindle without reinforcing ribs is 219.69 / cm. 4 The flexural modulus of the section without reinforcing ribs is 33.80 / cm². 3 Assume the moment of inertia of the stiffener section is 241.60 / cm. 4 Assume the flexural modulus of the reinforcing rib is 37.17 / cm². 3 The section moment of inertia increased by 9.97%, the section bending modulus increased by 9.97%, the weight increased by 52.41 kg, and the weight increased by 1.87 kg / m per meter;

[0052] As can be seen, after adding the reinforcing rib 20, the weight of the main shaft 10 per meter only increases by 1.87 kg to 2.34 kg, while the bearing capacity of the main shaft section increases by 6.9% to 9.97%, which shows that this disclosure has significant advantages.

[0053] In this disclosure, both the spindle body 11 and the reinforcing rib 20 can be made of zinc-aluminum-magnesium alloy steel. Using materials of the same thickness simplifies material procurement and management, improves material utilization, and reduces waste.

[0054] The spindle body 11 and the reinforcing rib 20 can use the same material, meaning they can use the same processing tools and techniques, simplifying the production process and improving efficiency. Furthermore, during welding or bonding, materials of the same thickness more easily achieve a uniform heat-affected zone and bonding surface, improving connection quality. Simplifying manufacturing processes reduces equipment investment and labor costs, further lowering overall production costs. The reinforcing rib 20 and the spindle body 11 can maintain a consistent appearance. Moreover, when performing surface treatments (such as painting, plating, etc.), using the same material makes it easier to achieve uniform treatment results, improving surface quality and corrosion resistance.

[0055] In this disclosure, multiple stiffeners 20 are integrally formed with the main shaft body 11. The stiffeners 20 help to evenly distribute concentrated loads over a larger area, avoiding material fatigue or failure caused by excessive local stress.

[0056] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and this disclosure will not describe the various possible combinations separately.

[0058] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A main shaft of a photovoltaic support, characterized in that, The main shaft body is provided with a hollow part inside; The main shaft body is provided with a hollow part inside; The number of the reinforcing ribs is multiple, and the multiple reinforcing ribs are arranged on the inner wall of the main shaft body; The multiple reinforcing ribs are equidistantly arranged around the circumference of the axis of the main shaft; The length of the reinforcing rib along the axis of the main shaft is not less than 1 / 3 of the length of the main shaft.

2. A main shaft of a photovoltaic racking according to claim 1, characterized in that, The reinforcing rib is provided in a plate shape, and extends along the radial direction of the main shaft towards the axis of the main shaft.

3. A main shaft for a photovoltaic racking according to claim 2, characterized in that, The reinforcing rib has a spacing with the axis.

4. A main shaft of a photovoltaic support according to any one of claims 1-3, characterized in that, The thickness D2 of the main shaft body is greater than or equal to the thickness D1 of the reinforcing rib.

5. A main shaft for a photovoltaic racking according to claim 4, characterized in that, The thickness D2 of the main shaft body is 2.2mm-2.7mm, and the thickness D1 of the reinforcing rib is 1.5mm-2.7mm.

6. A main shaft of a photovoltaic support according to any one of claims 1-3, characterized in that, The main shaft is provided with the reinforcing rib at least in the middle position of the axial direction.

7. A main shaft of a photovoltaic mounting according to any of claims 1-3, characterized in that, The axial cross section of the main shaft body is in a square, oval or octagonal shape; The number of the reinforcing ribs is four, and the four reinforcing ribs are equidistantly arranged around the axial cross section.

8. The main shaft of a photovoltaic mount according to claim 1, wherein, The main shaft body and the reinforcing rib are made of zinc-aluminum-magnesium alloy steel.

9. The main shaft of a photovoltaic mount according to claim 1, wherein, The multiple reinforcing ribs are integrally formed with the main shaft body.

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