Main shaft connecting structure and photovoltaic tracking support

Abstract

This application relates to the field of photovoltaic power generation technology, and discloses a main shaft connection structure and a photovoltaic tracking bracket. The main shaft connection structure includes at least two main shaft segments connected sequentially along the length direction and a connecting assembly connecting the two main shaft segments. The connecting assembly is disposed between two adjacent main shaft segments for series connection of the main shaft segments to form an integral main shaft. The connecting assembly includes a connecting body and a fastening assembly. The two ends of the connecting body are respectively sleeved with the ends of adjacent main shaft segments, and the connecting body is made of a high-polymer composite material to reduce weight and manufacturing costs. The fastening assembly connects the main shaft segments and the connecting body for fixed connection. Through the above design, this application can effectively reduce the load-bearing capacity requirements of the photovoltaic bracket while ensuring connection strength and stability, simplifying the assembly process, and improving the overall service life.

Description

Technical Field

[0001] This application relates to the field of photovoltaic power generation technology, and further to a main shaft connection structure and a photovoltaic tracking bracket. Background Technology

[0002] The main shaft of a photovoltaic tracking bracket is typically composed of multiple shaft segments connected in series. Connectors are installed within the bracket to link adjacent shaft segments together. Existing connectors are generally made of metal, which, while possessing high strength, is also heavy, increasing the overall weight of the main shaft and placing higher demands on the bracket's load-bearing capacity. Furthermore, metal is expensive to manufacture and prone to corrosion during long-term operation, affecting stability. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this application is to provide a spindle connection structure and a photovoltaic tracking bracket, which effectively reduces the weight of the connectors and alleviates the overall load on the spindle.

[0004] To achieve the above objectives, this application provides a spindle connection structure, including at least two spindle segments connected sequentially along the length direction and a connecting assembly connecting the two spindle segments; the connecting assembly is disposed between two adjacent spindle segments for connecting the two adjacent spindle segments, and the connecting assembly includes:

[0005] A connecting body, the two ends of which are respectively sleeved with the ends of the adjacent main shaft segments, the connecting body being made of a polymer composite material;

[0006] A fastening assembly connects the spindle segment and the connecting body, and is used to fix the connecting body to the spindle segment.

[0007] In some embodiments, the connecting body includes a first split portion and a second split portion, wherein the first split portion is disposed radially within the second split portion along the connecting body, and the outer surface of the second split portion is in contact with the inner wall of the main shaft segment;

[0008] The first and / or the second segment are configured as tubular structures, and a reinforcing rib is provided between the outer surface of the first segment and the inner surface of the second segment. The reinforcing rib connects the inner wall of the second segment and the outer wall of the first segment in the radial direction of the connecting body.

[0009] In some embodiments, the second split part is a tubular structure, the reinforcing rib is located at least in the sleeve area corresponding to the connection body and the main shaft segment when they are fixedly connected, and the fastening component is disposed in the area of ​​the connection body where the reinforcing rib is located.

[0010] In some embodiments, the reinforcing rib includes a plurality of longitudinal reinforcing portions, the longitudinal reinforcing portions extending in a direction parallel to the axial direction of the connecting body and being uniformly and symmetrically distributed along the circumference of the connecting body.

[0011] In some embodiments, a plurality of the longitudinal reinforcing portions form at least partially continuous zigzag lines on the cross-section of the connecting body, each zigzag line being formed by sequentially connecting at least two longitudinal reinforcing portions with different inclination directions; the bend angle of the zigzag line is located on the peripheral wall of the first split portion or the peripheral wall of the second split portion;

[0012] And / or, the reinforcing rib includes a plurality of transverse reinforcing portions, the extension direction of which is perpendicular to the axial direction of the connecting body, and is spaced apart along the axial direction of the connecting body between the inner wall of the second split portion and the outer wall of the first split portion.

[0013] In some embodiments, the first split part is a tubular structure, and the first split part and the second split part are coaxially arranged; the inner diameter of the first split part is smaller than the inner diameter of the second split part, thereby forming an annular gap between them, and the reinforcing ribs are arranged in the annular gap and evenly distributed along the circumference of the connecting body.

[0014] In some embodiments, the axial length of the second split portion is greater than the axial length of the first split portion, and the reinforcing rib includes an inclined reinforcing portion;

[0015] One end of the inclined reinforcing part is fixedly connected to the end of the second split part, and the other end is fixedly connected to the end of the first split part, so as to form a tapered closing structure at the corresponding end of the connecting body.

[0016] In some embodiments, each of the spindle segments is provided with at least two fastening components, which are evenly distributed along the circumference of the spindle segment, wherein the fastening components include a first fastener and a second fastener.

[0017] The first fastener is a fastening bolt, and the second fastener is a fastening nut pre-installed in the connecting body, wherein the fastening nut is integrally formed with the connecting body;

[0018] The main shaft section has a first through hole on its tube wall for the fastening bolt to pass through, and the connecting body has a second through hole corresponding to the first through hole. The threaded hole of the fastening nut is coaxially arranged with the second through hole. The fastening bolt passes through the first through hole and the second through hole and is connected to the fastening nut.

[0019] In some embodiments, the peripheral wall of the connecting body is provided with several rows of adjustment holes, and each row of adjustment holes is spaced apart along the axial direction of the connecting body;

[0020] And / or, the outer peripheral wall of the connecting body is provided with a weld bead clearance groove, the weld bead clearance groove corresponding to the weld at the end of the spindle section, so as to accommodate the weld when the connecting body and the spindle section are sleeved together.

[0021] In another aspect of this application, a photovoltaic tracking bracket is also provided, including a column, a bearing assembly, and a spindle connection structure as described in any of the above embodiments. The bearing assembly is disposed at the top of the column, and the spindle segment of the spindle connection structure passes through the corresponding bearing assembly. A plurality of the spindle segments are connected end to end in sequence to form a spindle.

[0022] Compared with the prior art, the spindle connection structure and photovoltaic tracking bracket provided in this application have at least the following advantages:

[0023] The connecting assembly includes a connecting body made of high-polymer composite material, which effectively reduces the weight of the connectors and lightens the overall load on the main shaft, thereby reducing the strength requirements for the photovoltaic support structure. Simultaneously, the high-polymer composite material possesses good formability and corrosion resistance, allowing for mass production through processes such as injection molding, reducing manufacturing costs and extending service life. Furthermore, both ends of the connecting body are respectively sleeved onto the main shaft section and reliably fixed by fastening components, ensuring the overall connection strength and operational stability of the main shaft. Attached Figure Description

[0024] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of this application.

[0025] Figure 1 This is a schematic diagram of the spindle connection structure in one embodiment of this application;

[0026] Figure 2 yes Figure 1 A schematic diagram of the local structure at point A in the middle;

[0027] Figure 3 This is an exploded structural diagram of one embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the connecting body in one embodiment of this application;

[0029] Figure 5 This is a front view of the connecting body in one embodiment of this application;

[0030] Figure 6This is a longitudinal sectional view of the connecting body in one embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the structure of the connecting body in another embodiment of this application;

[0032] Figure 8 This is a front view of the connecting body in another embodiment of this application.

[0033] Reference numerals: Connecting body 1; Second through hole 10; First split part 11; Second split part 12; Reinforcing rib 13; Longitudinal reinforcing part 131; Inclined reinforcing part 132; Adjusting hole 140; Weld clearance groove 150; Fastening assembly 2; First fastener 21; Second fastener 22; Main shaft section 3; First through hole 30. Detailed Implementation

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0035] To keep the drawings concise, each drawing only schematically shows the parts relevant to the application; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one."

[0036] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0037] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] In photovoltaic (PV) power generation systems, a PV tracking bracket structure is typically used to achieve tracking operation of PV modules. The PV tracking bracket contains a main shaft used to drive and support the synchronized rotation of multiple PV modules. Since the main shaft is usually quite long, for ease of transportation and processing, current technology generally uses connectors to link multiple main shaft segments together to form a single main shaft.

[0041] Existing spindle connectors are mostly made of metal, such as steel or aluminum alloy. While metal provides a certain level of strength, its weight is also significant, increasing the overall weight of the spindle and thus placing higher demands on the load-bearing capacity of the support frame. Furthermore, the processing of metal is complex and costly, which can easily increase system manufacturing and transportation costs in large-scale applications.

[0042] In addition, metal connectors are prone to corrosion during long-term operation due to environmental humidity, temperature difference or electrochemical reaction, which affects the stability of the connection and its service life.

[0043] In one embodiment, refer to the appendix to the specification. Figure 1 This application describes a spindle connection structure that can reduce the weight of the connector, lower costs, and improve durability while ensuring connection strength.

[0044] Reference manual attached Figure 1 The present application provides a spindle connection structure, including two adjacent spindle segments 3 and a connecting assembly connecting the two adjacent spindle segments 3. The connecting assembly is used to reliably connect multiple spindle segments 3 to form an integral spindle, thereby ensuring that the photovoltaic module can achieve stable rotation and tracking during operation. Specifically, the spindle includes at least two spindle segments 3 connected sequentially along the length direction, and the connecting assembly is disposed between two adjacent spindle segments 3 for connecting them to each other.

[0045] like Figure 2 and Figure 3 As shown, the connecting assembly includes a connecting body 1 and a fastening assembly 2. The two ends of the connecting body 1 are respectively sleeved with the ends of the adjacent spindle segments 3. The fastening assembly 2 is disposed between the spindle segments 3 and the connecting body 1 and is used to fix the connecting body 1 and the spindle segments 3, so that the spindle as a whole has sufficient strength and stability.

[0046] The connecting body 1 is made of high-polymer composite material, which can significantly reduce the overall weight of the main shaft compared with traditional metal connectors, thereby reducing the load on the photovoltaic bracket, reducing production and transportation costs, and effectively avoiding corrosion problems caused by environmental humidity and temperature differences.

[0047] Thus, by adopting the above-mentioned solution in this embodiment, the problems of heavy weight, high load-bearing requirements, high manufacturing costs, and insufficient durability caused by the common use of metal materials in the main shaft connectors in the prior art can be effectively solved. The connecting body 1 is made of polymer composite material, which not only improves the lightweight level of the structure, but also improves the overall operational stability and lifespan, thereby providing a guarantee for the long-term efficient operation of the photovoltaic power generation system.

[0048] In practical implementation, the connecting body 1 can be designed as a hollow cylindrical structure, with both ends inserted into the corresponding ports of the main spindle segment 3 to form a sleeve. During installation, the two ends of the connecting body 1 are first inserted into the adjacent main spindle segments 3 for initial positioning. Then, the connecting body 1 and the main spindle segments 3 are fixed using the fastening assembly 2 to ensure stability at the connection under stress. The fastening assembly 2 can be a combination of bolts and nuts, or other forms of mechanical fasteners, such as riveting or mortise and tenon joints, to meet different installation requirements.

[0049] It should be noted that the connection method between the spindle segment 3 and the connecting body 1 is not specifically limited in this embodiment. For example, the end of the spindle segment 3 is sleeved on the outer peripheral surface of the connecting body 1, so that the connecting body 1 can be at least partially located in the inner cavity of the spindle segment 3; similarly, the end of the spindle segment 3 can also be sleeved on the inner periphery of the connecting body 1.

[0050] Based on the above, in a preferred embodiment, the fastening assembly 2 includes a nut and bolt mating structure. A limiting groove is pre-set on the corresponding component (connecting body 1 or spindle section 3) to accommodate and limit the head of the nut or bolt, preventing rotation and detachment during assembly. Simultaneously, a bolt hole is formed on another corresponding component, allowing the bolt to pass through and mate with the nut in the fastening assembly 2, thereby achieving reliable fixation of the connecting body 1 and the spindle section 3 through axial compression. This structural arrangement avoids the strength reduction caused by drilling through holes on the outer walls of all components, while ensuring the stability and anti-loosening performance of the fasteners under stress, significantly improving assembly quality.

[0051] In one embodiment, such as Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the connecting body 1 includes at least a first split part 11 and a second split part 12. The first split part 11 is disposed inside the second split part 12 along the radial direction of the connecting body 1, and the outer surface of the second split part 12 is fitted with the inner wall of the main shaft section 3. The first split part 11 and / or the second split part 12 are designed as tubular structures to ensure the overall hollow characteristics, reduce the structural weight, and facilitate material forming.

[0052] The reinforcing rib 13 is disposed between the outer wall of the first split part 11 and the inner wall of the second split part 12, and connects the first split part 11 and the second split part 12 in the radial direction. In this way, the presence of the reinforcing rib 13 fixes the relative position between the two split parts and can effectively disperse stress when the main shaft is subjected to force, preventing local deformation or loosening.

[0053] It should be noted that the first segment 11 and / or the second segment 12 are configured as tubular structures to ensure a uniform force distribution during the stress process of the main shaft segment 3 and to enhance the radial and axial support performance of the connecting body 1. However, this application is not limited to designing all segments as complete tubular structures. In some embodiments, another segment located inside or outside the tubular structure may adopt a discontinuous structural layout, such as intermittently arranged connecting or supporting portions.

[0054] In this type of implementation, such as Figure 7 As shown, the discontinuous connecting or supporting parts are connected to adjacent tubular structures by reinforcing ribs 13, which are distributed at intervals in the circumferential direction, thereby forming local fixed-point supports. This arrangement reduces material usage and overall weight while providing effective support at critical locations, ensuring the overall structural rigidity and stability.

[0055] For example, when the outer layer is designed as a complete tubular structure, the inner layer can be composed of several circumferentially distributed support strips. Each support strip is fixedly connected to the outer tubular part through reinforcing ribs 13, thereby significantly enhancing torsional resistance while maintaining overall lightweight design. Conversely, when the inner layer is a complete tubular structure, the outer layer can also be designed as discontinuous support rings or arc segments, which can also be combined with the inner tubular part through reinforcing ribs 13 to form a stable overall structure.

[0056] Furthermore, the stiffeners 13 can be arranged at intervals along the circumference, evenly distributed in a ring-like manner, thereby forming a stable support frame as a whole. Through this layout, the stiffeners 13 not only improve the compressive strength of the connecting body 1, but also enhance its torsional resistance, enabling the connecting body 1 to maintain good structural stability under long-term operation and alternating loads.

[0057] Through the above design, the first segment 11 and the second segment 12 form an integral load-bearing frame under the support of the reinforcing rib 13, which not only retains the lightweight characteristics of the hollow tubular structure, but also establishes effective support between the inner and outer layers. This not only improves the structural strength of the connecting body 1 itself, but also further extends the service life of the main shaft under complex load environments, ensuring the reliability and safety of the photovoltaic tracking bracket during operation.

[0058] In other embodiments, the connecting body 1 may also include a third, fourth, or even more layers of segments, with each segment arranged radially in a nested manner and interconnected by reinforcing ribs 13, thereby forming a multi-layered main shaft connection structure, which further enhances the overall rigidity and load-bearing capacity of the connecting body 1. Furthermore, the multi-layered structure facilitates the placement of reinforcing ribs 13 of different forms or distribution patterns between different segments to specifically enhance local support effects.

[0059] In one embodiment, based on the above, the second segment 12 is configured as a tubular structure, such as... Figure 7 As shown, reinforcing ribs 13 are arranged at least in the corresponding sleeve area when the connecting body 1 and the spindle segment 3 are fixedly connected. In this area, the reinforcing ribs 13 connect the second split part 12 to the corresponding first split part 11, thereby forming local reinforcement support at the key sleeve position. Through this structural design, the fit between the end of the spindle segment 3 and the connecting body 1 is more secure during assembly and stress, and it is less likely to loosen or deform.

[0060] Furthermore, the fastening component 2 is positioned in the area with the reinforcing rib 13, enabling a more reliable fixation between the connecting body 1 and the main shaft segment 3. Since the fastening component 2 overlaps with the area containing the reinforcing rib 13, the fastening force can be evenly distributed throughout the entire socket area during force transmission, significantly improving local support stiffness and ensuring connection stability and service life. For example, the reinforcing rib 13 can be arranged only in the circumferential section near the bolt holes or fastening positions to provide directional support and transmission of the locking force of the fastening component 2, further enhancing the fastening effect.

[0061] Compared with existing metal connectors, the connecting body 1 in this embodiment uses a polymer composite material and compensates for the lack of material strength through local reinforcement, thereby achieving high reliability and safety while ensuring lightweight.

[0062] In one embodiment, further, such as Figure 4 As shown, the reinforcing rib 13 includes several longitudinal reinforcing portions 131. The longitudinal reinforcing portions 131 extend parallel to the axial direction of the connecting body 1 and are evenly and symmetrically distributed along the circumference of the connecting body 1. The longitudinal reinforcing portions 131 extend continuously along the length of the connecting body 1, forming a stable axial support between the inner wall of the second segment 12 and the outer wall of the first segment 11. Thus, the uniform circumferential distribution of the longitudinal reinforcing portions 131 makes the overall force more balanced, avoids local stress concentration, and ensures the reliability and durability of the connecting body 1 during long-term use.

[0063] Understandably, through the configuration of this embodiment, the connecting body 1 can obtain uniform mechanical constraints in both the axial and circumferential directions after the main shaft section 3 is installed, thereby improving the stability of the sleeve part when transmitting axial loads and torques.

[0064] For example, the longitudinal reinforcement 131 can be designed as multiple ribs extending along the axial direction of the connecting body 1, evenly arranged in the annular gap between the inner and outer parts. Each longitudinal reinforcement 131 is simultaneously connected to the outer wall of the first part 11 and the inner wall of the second part 12 in the radial direction, thereby forming a continuous and stable support in the axial direction.

[0065] Further reference Figure 7 and Figure 8 The longitudinal reinforcing parts 131 are arranged in an alternating manner, so that the first split part 11 and the second split part 12 form multiple force paths in multiple directions, which can effectively improve the overall bonding strength between the split parts. When the connecting body 1 is subjected to bending load or eccentric load, the force can be distributed and balanced through the staggered reinforcing parts, reducing the risk of local concentrated deformation, further improving the overall stability of the connecting body 1, and making the spindle more reliable during operation.

[0066] In one embodiment, such as Figure 5 As shown, a plurality of longitudinal reinforcing portions 131 form at least partially continuous zigzag structures on the cross-section of the connecting body 1. Specifically, the zigzag is formed by connecting at least two longitudinal reinforcing portions 131 with different inclination directions in sequence, and the bend of the zigzag is located on the outer peripheral wall of the first segment 11 or the inner peripheral wall of the second segment 12.

[0067] The design in this embodiment makes the longitudinal reinforcement 131 appear as a continuous polygonal line in cross-section. Thus, when transmitting loads, the longitudinal reinforcement 131 will generate component forces in different angular directions, thereby enhancing the support effect on the first segment 11 and the second segment 12. In addition, this polygonal cross-section design can also buffer and disperse stress, especially at the end of the connection area of ​​the main shaft segment 3, preventing cracking or deformation caused by sudden changes in force.

[0068] In one embodiment, the reinforcing rib 13 further includes a plurality of transverse reinforcing portions, the extension direction of which is perpendicular to the axial direction of the connecting body 1, and distributed at intervals along the axial direction of the connecting body 1 between the inner wall of the second split portion 12 and the outer wall of the first split portion 11.

[0069] Understandably, the arrangement of the transverse reinforcement can form a reinforced connection between the first split part 11 and the second split part 12 in the radial direction, forming a ring-like structural support as a whole, which can resist the radial expansion or contraction trend generated by the main shaft during operation.

[0070] In some embodiments, the longitudinal reinforcement 131 and the transverse reinforcement can also be combined to form a crisscrossing reinforcement system. The longitudinal reinforcement 131 provides continuous axial load support, and the transverse reinforcement provides circumferential restraint. The two work together to ensure that the reinforcing ribs 13 have good support capacity in all three dimensions, thereby significantly improving the overall stability and reliability of the connecting body 1 under complex stress conditions.

[0071] Based on the above embodiments, in one implementation, such as Figure 4 As shown, both the first segment 11 and the second segment 12 are tubular structures, and they are coaxially arranged in the radial direction. The inner diameter of the first segment 11 is smaller than the inner diameter of the second segment 12, thus forming an annular gap between the outer wall of the first segment 11 and the inner wall of the second segment 12. Reinforcing ribs 13 are disposed within the annular gap and are evenly distributed circumferentially to form a stable support.

[0072] Thus, the configuration of this embodiment makes the connecting body 1 present a sleeve-like composite structure, which not only provides continuous support in the radial direction, but also forms a stable integrity in the axial direction. This can significantly improve the resistance to deformation when the main shaft section 3 is subjected to bending or torsional loads, and prevent local deformation from being transmitted to the entire connecting area, thereby improving the load-bearing performance and service life of the connecting body 1.

[0073] Meanwhile, the reinforcing ribs 13 evenly distributed in the annular gap ensure that the first part 11 and the second part 12 can be effectively supported at different circumferential positions, ensuring that the force transmission is more uniform and reducing the risk of loosening or cracking of the connection due to uneven local force.

[0074] Furthermore, the axial length of the second split part 12 is greater than the axial length of the first split part 11. The reinforcing rib 13 in the above embodiment includes an inclined reinforcing part 132. One end of the inclined reinforcing part 132 is connected to the end of the second split part 12, and the other end is connected to the end of the first split part 11, thereby forming a tapered transition structure in the end region of the connecting body 1.

[0075] It should be noted that the above design enables a relatively smooth mechanical transition within the sleeve area between the connecting body 1 and the main shaft section 3, avoiding localized stress concentration at the end of the connecting body 1. Especially during the operation of the photovoltaic support, the main shaft often bears both bending and axial loads simultaneously. If the transition at the end of the connecting body 1 is not reasonable, it can easily lead to fatigue cracking in the connection area.

[0076] In this embodiment, the inclined reinforcing part 132 is used to gradually distribute the load in the end region, thereby improving the reliability of the connecting body 1 during long-term use. In specific implementations, the inclination angle of the inclined reinforcing part 132 can be adjusted according to the diameter, wall thickness and actual load-bearing requirements of the main shaft section 3; in addition, the inclined reinforcing part 132 can also be continuously arranged with the longitudinal reinforcing part 131 to form an integrated structure, which makes the overall deformation resistance of the connecting body 1 better.

[0077] In one embodiment, each spindle segment 3 is provided with at least two fastening components 2. The fastening components 2 are evenly distributed along the circumference of the spindle segment 3, thereby forming a stable and symmetrical locking force between the connecting body 1 and the spindle segment 3, thus avoiding local deformation or loosening caused by uneven force.

[0078] Among them, such as Figure 3 , Figure 4 and Figure 6The fastening component 2 includes a first fastener 21 and a second fastener 22 that cooperate with each other. The second fastener 22 is pre-embedded in the connecting body 1 and can be pre-embedded and fixed during the injection molding process, or it can be integrally combined with the connecting body 1 by means of hot melting, pressing, etc. The second fastener 22 is firmly held in a predetermined position during the molding or installation stage, thereby preventing displacement during subsequent assembly.

[0079] The first fastener 21 is inserted from the outer wall side of the spindle section 3 during assembly and engages with the second fastener 22 via threads or mechanical engagement. When the first fastener 21 is operated, the outer wall portion of the spindle section 3 can be pressed against the outer or inner circumferential surface of the connecting body 1, so that the connecting body 1 and the spindle section 3 are firmly locked in the radial direction.

[0080] Understandably, by pre-setting a second fastener 22 in the connecting body 1 and using it in conjunction with the first fastener 21, the installation process is made simpler. Since the second fastener 22 is already firmly bonded to the connecting body 1 during the forming stage, the installer only needs to operate the first fastener 21 on site to complete the connection, without the need for additional positioning or auxiliary operations, thereby significantly shortening the installation process and improving overall production efficiency.

[0081] In specific applications, the second fastener 22 can be integrally bonded to the polymer composite material of the connecting body 1 by hot melting, pressing, or injection molding. This bonding method not only enables the second fastener 22 to withstand greater tensile and torque forces during use, but also effectively prevents displacement or loosening problems caused by long-term use.

[0082] When the first fastener 21 and the second fastener 22 are engaged, the stress can be uniformly transferred to the surrounding polymer composite material through the outer surface of the second fastener 22, thereby avoiding material cracking or plastic deformation caused by localized stress concentration. Furthermore, by pre-embedding or pre-installing, the connection strength of the polymer material can be prevented from decreasing due to repeated disassembly and reassembly of the second fastener 22, significantly improving the overall durability and reliability of the product. In other embodiments, the second fastener 22 can be a limiting member or a metal insert, and the first fastener 21 can be connected to it via threads or snap-fit, thereby producing the same clamping effect.

[0083] Furthermore, three, four, or more fastening components 2 can be arranged on the same spindle segment 3 to achieve a more balanced force distribution in large-diameter spindles. For smaller-diameter spindle segments 3, the number of fastening components 2 can be reduced, thereby lowering machining and assembly costs.

[0084] Based on the above embodiments, in one embodiment, the first fastener 21 is a fastening bolt, and the second fastener 22 is a fastening nut. The fastening nut is pre-embedded in the connecting body 1 during the molding process and is integrally formed with the connecting body 1. This structural arrangement enables a reliable fixing relationship between the fastening nut and the polymer composite matrix, ensuring fastening strength while avoiding the problem of nut rotation or loosening during use.

[0085] Specifically, the main spindle section 3 has a pre-set first through hole 30 on its tube wall, and the connecting body 1 has a corresponding second through hole 10. The threaded hole of the fastening nut is coaxially arranged with the second through hole 10, so that the fastening bolt can pass smoothly through the first through hole 30 on the main spindle section 3 and the second through hole 10 on the connecting body 1 during installation, and finally be tightened and locked with the fastening nut. Thus, after the fastening bolt is tightened, it can firmly press the tube wall of the main spindle section 3 against the outer surface of the connecting body 1, thereby achieving reliable fixation between the main spindle section 3 and the connecting body 1.

[0086] The combination of fastening bolts and pre-embedded fastening nuts makes the assembly process intuitive and highly reliable. Installation requires only conventional tools for locking, avoiding complex processes or the use of additional accessories, significantly improving installation efficiency. Simultaneously, the integrated design of the pre-embedded nuts and the connecting body 1 can withstand significant tensile and torque forces, ensuring that the main shaft connection structure is not prone to loosening or detachment during the long-term operation of the photovoltaic bracket.

[0087] In one embodiment, such as Figure 7 As shown, the inner peripheral wall of the connecting body 1 is provided with several rows of adjustment holes 140. Each row of adjustment holes 140 is distributed at intervals along the axial direction of the connecting body 1, so that the adjustment holes 140 are evenly distributed at different positions of the connecting body 1, so as to provide operational support when installation or fine-tuning of position is required. The size and shape of the adjustment holes 140 can be designed as round holes, oblong holes or other shapes that are easy for tools to insert, and can be adapted to the corresponding adjustment tools.

[0088] In actual operation, the adjustment personnel can insert the adjustment tool into the adjustment hole 140 and use the tool to hook or abut against the hole wall of the adjustment hole 140, thereby applying axial thrust or pull force to the connecting body 1 so as to achieve precise position adjustment of the connecting body 1 relative to the main shaft section 3.

[0089] Thus, by setting adjustment holes 140 on the inner peripheral wall of the connecting body 1, the ease of operation of the spindle connection structure during installation and maintenance can be effectively improved. Installers can complete the positioning adjustment of the connecting body 1 without the need for special clamps, which significantly improves construction efficiency.

[0090] Furthermore, the number of adjustment holes 140 can be selected according to the length of the connecting body 1. When the connecting body 1 is long, multiple adjustment holes 140 can be set along the axial direction to meet the adjustment requirements of different positions; while for a shorter connecting body 1, adjustment holes 140 can be set only in the two end areas.

[0091] In other embodiments, adjustment holes 140 are disposed on the outer peripheral wall of the connecting body 1 and are spaced apart along the axial direction of the connecting body 1. Since the adjustment holes 140 are directly exposed on the outer surface of the connecting body 1, installation or maintenance personnel can directly insert wrenches, hooks, or similar adjustment tools into the adjustment holes 140 from the outside to apply external force to the connecting body 1, thereby achieving its precise positioning and axial movement within the spindle section 3. Simultaneously, this solution can also be used in conjunction with adjustment holes 140 disposed on the inner peripheral wall of the connecting body 1 when necessary, providing dual-sided adjustment operation paths, thereby improving the redundancy and operational flexibility of the connecting assembly.

[0092] Furthermore, the outer peripheral wall of the connecting body 1 is provided with a weld bead clearance groove 150, which corresponds to the weld of the spindle section 3. When the connecting body 1 and the spindle section 3 are sleeved, the spindle section 3 usually has radially protruding welds due to the welding process. If the sleeve is directly made, it is easy to cause gaps or interference between the connecting body 1 and the spindle section 3 on the contact surface, which not only affects the assembly accuracy, but may also lead to loose fastening, thereby reducing the structural stability of the entire spindle.

[0093] By pre-setting a weld clearance groove 150 on the outer peripheral wall of the connecting body 1, the weld portion can be reliably accommodated in the clearance groove 150 during the sleeve connection process, thereby ensuring that the contact surfaces of the connecting body 1 and the spindle section 3 can be fully fitted, and avoiding connection instability caused by weld interference.

[0094] Through the design of this embodiment, without requiring additional adjustments to the welding process of the spindle section 3, a tighter fit can be achieved between the connecting body 1 and the spindle section 3, improving installation compatibility and convenience. Simultaneously, the weld clearance groove 150 effectively reduces the risk of stress concentration caused by weld protrusions, preventing cracks or loosening at the connection point due to excessive local stress during long-term operation, thereby extending the overall service life of the spindle.

[0095] In practical applications, the depth and width of the weld clearance groove 150 can be reasonably selected to fully accommodate the weld, thereby further ensuring the stability and reliability of the spindle connection structure in the sleeve state.

[0096] In one embodiment, according to another aspect of this application, this application also provides a photovoltaic tracking bracket, including a column, a bearing assembly, and the spindle connection structure described above.

[0097] The bearing assembly is located at the top of the column. Refer to the above text and illustrations. Several main shaft segments 3 are connected end to end and inserted into the corresponding bearing assemblies. They are connected segment by segment through the aforementioned main shaft connection structure to form a main shaft that runs through the entire photovoltaic tracking bracket row.

[0098] The spindle connection structure is located between adjacent spindle segments 3. Through the sleeve fit of the connecting body 1 and the locking action of the fastening component 2, each spindle segment 3 can maintain good coaxiality and connection stability after installation. In addition, the connecting body 1, made of polymer composite material, can effectively reduce the overall weight of the spindle, reduce the load pressure on the column and bearing assembly, and improve the service life of the system.

[0099] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A spindle connection structure, characterized in that, It includes at least two main spindle segments connected sequentially along the length direction and a connecting assembly connecting the two main spindle segments. The connecting assembly is disposed between two adjacent main spindle segments, and the connecting assembly includes: A connecting body, the two ends of which are respectively sleeved with the ends of the adjacent main shaft segments, the connecting body being made of a polymer composite material; A fastening assembly connects the spindle segment and the connecting body, and is used to fix the connecting body to the spindle segment.

2. The spindle connection structure according to claim 1, characterized in that, The connecting body includes a first split part and a second split part. The first split part is disposed radially inside the second split part, and the outer surface of the second split part is in contact with the inner wall of the main shaft section. The first and / or the second segment are configured as tubular structures, and a reinforcing rib is provided between the outer surface of the first segment and the inner surface of the second segment. The reinforcing rib connects the inner wall of the second segment and the outer wall of the first segment in the radial direction of the connecting body.

3. The spindle connection structure according to claim 2, characterized in that, The second split part is a tubular structure, the reinforcing rib is located at least in the sleeve area corresponding to the connection body and the main shaft section when they are fixedly connected, and the fastening component is disposed in the area of ​​the connection body where the reinforcing rib is located.

4. The spindle connection structure according to claim 3, characterized in that, The reinforcing rib includes several longitudinal reinforcing parts, the extension direction of which is parallel to the axial direction of the connecting body and is evenly and symmetrically distributed along the circumference of the connecting body.

5. The spindle connection structure according to claim 4, characterized in that, A plurality of the longitudinal reinforcing portions form at least partially continuous broken lines on the cross-section of the connecting body, and each broken line is formed by connecting at least two longitudinal reinforcing portions with different inclination directions in sequence; the bend angle of the broken line is located on the peripheral wall of the first split portion or the peripheral wall of the second split portion; And / or, The reinforcing rib includes several transverse reinforcing portions, the extension direction of which is perpendicular to the axial direction of the connecting body, and is spaced apart along the axial direction of the connecting body between the inner wall of the second split portion and the outer wall of the first split portion.

6. The spindle connection structure according to any one of claims 3-5, characterized in that, The first split part is a tubular structure, and the first split part and the second split part are coaxially arranged; the inner diameter of the first split part is smaller than the inner diameter of the second split part, thereby forming an annular gap between them, and the reinforcing ribs are arranged in the annular gap and evenly distributed along the circumference of the connecting body.

7. The spindle connection structure according to claim 6, characterized in that, The axial length of the second split part is greater than the axial length of the first split part, and the reinforcing rib includes an inclined reinforcing part; One end of the inclined reinforcing part is fixedly connected to the end of the second split part, and the other end is fixedly connected to the end of the first split part, so as to form a tapered closing structure at the corresponding end of the connecting body.

8. The spindle connection structure according to claim 1, characterized in that, Each of the main spindle segments is provided with at least two fastening components, which are evenly distributed along the circumference of the main spindle segment. Each fastening component includes a first fastener and a second fastener. The first fastener and the second fastener are configured to cooperate, and the connecting body is pre-installed with the second fastener; The first fastener is a fastening bolt, and the second fastener is a fastening nut pre-installed in the connecting body, wherein the fastening nut is integrally formed with the connecting body; The main shaft section has a first through hole on its tube wall for the fastening bolt to pass through, and the connecting body has a second through hole corresponding to the first through hole. The threaded hole of the fastening nut is coaxially arranged with the second through hole. The fastening bolt passes through the first through hole and the second through hole and is connected to the fastening nut.

9. The spindle connection structure according to any one of claims 1-5 and 7-8, characterized in that, The peripheral wall of the connecting body is provided with several rows of adjustment holes, and each row of adjustment holes is distributed at intervals along the axial direction of the connecting body; And / or, The outer peripheral wall of the connecting body is provided with a weld bead avoidance groove, which corresponds to the weld at the end of the spindle section, so as to accommodate the weld when the connecting body and the spindle section are sleeved together.

10. A photovoltaic tracking bracket, characterized in that, The device includes a column, a bearing assembly, and a spindle connection structure as described in any one of claims 1 to 9. The bearing assembly is located at the top of the column, and the spindle segment of the spindle connection structure passes through the corresponding bearing assembly. Several spindle segments are connected end to end in sequence to form a spindle.

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