Limiting structure applied to main beam of photovoltaic tracking system

Abstract

The utility model discloses a limiting structure applied to a main beam of a photovoltaic tracking system. The limiting structure comprises a bearing outer ring, a bearing inner ring, a limiting assembly, the main beam and a stand column. The bearing outer ring is installed at the top of the stand column, the bearing inner ring is arranged on the periphery of the main beam in a sleeving mode, and the bearing inner ring is rotationally installed in the bearing outer ring; the limiting assembly sleeves the periphery of the main beam, and the bearing inner ring and the limiting assembly are arranged front and back in the axis direction of the main beam; the limiting assembly comprises two limiting parts, the two limiting parts are symmetrically arranged relative to the axis of the main beam, when the main beam rotates clockwise or anticlockwise, the two limiting parts rotate along the periphery of the bearing outer ring, and the joint of the bearing outer ring and the stand column can limit the rotating movement of the limiting parts. Limiting is achieved through rigid contact between the limiting part and the outer ring of the bearing when the main beam rotates, and the over-rotation trend of the main beam under the abnormal working conditions of strong wind, accumulated snow and the like is effectively blocked through the design.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic tracking system technology, and in particular to a limiting structure applied to the main beam of a photovoltaic tracking system. Background Technology

[0002] In current photovoltaic (PV) tracking systems, the slewing bearing assembly, as a core transmission component, generally suffers from a lack of safety protection features in its structural design. Specifically, the bearing housing lacks integrated angle limiting devices and dynamic self-locking mechanisms, exposing the main beam to multiple risks during operation. Under normal operating conditions, the tracker relies on the control system for angle constraint; however, in the event of sudden gusts of wind or control system failure, the main beam will experience abnormal torque impacts, significantly increasing the risk of transmission gear meshing failure. More seriously, snow accumulation or ice buildup can alter the centroid distribution of the PV tracking system, potentially causing irreversible over-rotation and resulting in microcracks or structural deformation of the PV modules. While existing technologies offer passive protection by adding counterweights or dampers, they fail to address the inherent safety issues at the mechanical design level, leaving the system with significant shortcomings in adaptability to complex environmental conditions. Utility Model Content

[0003] In response to the problems raised in the background technology, the purpose of this utility model is to propose a limiting structure for the main beam of a photovoltaic tracking system, which solves the problem that the main beam of the existing photovoltaic tracking system does not have a limiting structure to achieve rotation angle constraint.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A limiting structure for the main beam of a photovoltaic tracking system includes an outer bearing ring, an inner bearing ring, a limiting component, a main beam, and a column;

[0006] The outer ring of the bearing is installed on the top of the column, the inner ring of the bearing is fitted around the outer periphery of the main beam, and the inner ring of the bearing is rotatably installed inside the outer ring of the bearing.

[0007] The limiting component is fitted onto the outer periphery of the main beam, and the inner ring of the bearing and the limiting component are arranged back and forth along the axial direction of the main beam;

[0008] The limiting component includes two limiting parts, which are symmetrically arranged relative to the axis of the main beam. When the main beam rotates clockwise or counterclockwise, the two limiting parts rotate along the outer circumference of the bearing outer ring. The connection between the bearing outer ring and the column can limit the rotational movement of the limiting parts.

[0009] Preferably, the limiting component includes a limiting plate and a U-bolt, the U-bolt and the limiting plate are assembled to form a main beam space, the main beam space is used to clamp the outer periphery of the main beam;

[0010] The two limiting parts are respectively located at the left and right ends of the limiting plate.

[0011] Preferably, the limiting part includes a vertical part and a horizontal part. The bottom end of the vertical part is connected to the limiting plate, the top end of the vertical part is connected to one end of the horizontal part, and the other end of the horizontal part extends toward the outer ring of the bearing. The horizontal part is parallel to the axis of the main beam.

[0012] Preferably, the U-bolt includes two straight segments and a curved segment, with the two ends of the curved segment respectively connected to the two straight segments, and the end of the straight segment away from the curved segment is threaded;

[0013] The limiting plate has two through holes, and the two straight column segments pass through the two through holes and are connected to the nuts.

[0014] Preferably, the outer ring of the bearing is provided with a fisheye bearing cavity, and the inner ring of the bearing is a spherical bearing, wherein the spherical bearing can deflect relative to the axis of the fisheye bearing cavity.

[0015] Preferably, the bearing inner ring is composed of two bearing inner ring components, the bearing inner ring components are semi-circular, and the two bearing inner ring components are installed on the outside of the main beam.

[0016] Preferably, the bearing outer ring is composed of two bearing outer ring components, which are arranged opposite to each other, and the bearing inner ring is disposed between the two bearing outer ring components.

[0017] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0018] The main beam is controlled by rigid contact between the limiting part and the outer ring of the bearing during rotation. This design effectively prevents the main beam from over-rotating under abnormal conditions such as strong winds and snow accumulation. At the same time, the bidirectional symmetrical limiting part ensures that there is the same constraint capability in both directions of rotation, improving the system's adaptability in complex environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of the present invention;

[0020] Figure 2 This is an exploded view of one embodiment of the present invention;

[0021] Figure 3 yes Figure 2 Rear view;

[0022] Figure 4 This is a schematic diagram of a limit switch for rotation in one direction according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram showing the limiting position of rotation in another direction according to one embodiment of the present invention.

[0024] Among them: bearing outer ring 1, bearing outer ring component 11, bearing inner ring 2, bearing inner ring component 21, limiting component 3, limiting part 30, vertical part 301, horizontal part 302, limiting plate 31, through hole 311, U bolt 32, straight column section 321, curved section 322, nut 33, main beam 4 and column 5. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0028] 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following is in conjunction with the appendix Figures 1 to 5 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0030] A limiting structure for the main beam of a photovoltaic tracking system includes a bearing outer ring 1, a bearing inner ring 2, a limiting component 3, a main beam 4, and a column 5;

[0031] The outer ring 1 of the bearing is installed on the top of the column 5, the inner ring 2 of the bearing is fitted on the outer periphery of the main beam 4, and the inner ring 2 of the bearing is rotatably installed inside the outer ring 1 of the bearing.

[0032] The limiting component 3 is fitted onto the outer periphery of the main beam 4, and the bearing inner ring 2 and the limiting component 3 are arranged front and back along the axial direction of the main beam 4;

[0033] The limiting component 3 includes two limiting parts 30, which are symmetrically arranged relative to the axis of the main beam 4. When the main beam 4 rotates clockwise or counterclockwise, the two limiting parts 30 rotate along the outer circumference of the bearing outer ring 1. The connection between the bearing outer ring 1 and the column 5 can limit the rotational movement of the limiting parts 30.

[0034] This utility model proposes a technical solution including a bearing outer ring 1, a bearing inner ring 2, a limiting component 3, a main beam 4, and a column 5. The bearing outer ring 1 is installed on the top of the column 5, and the bearing inner ring 2 is rotatably installed inside the bearing outer ring 1. The bearing inner ring 2 and the limiting component 3 are both fitted onto the outer circumference of the main beam 4 and are arranged at intervals along the axial direction of the main beam 4. The limiting component 3 includes two symmetrically arranged limiting parts 30. When the main beam 4 rotates clockwise or counterclockwise, the limiting parts 30 interfere with the left and right sides of the bearing outer ring 1, respectively.

[0035] When the main beam 4 rotates, it drives the limiting component 3 to rotate synchronously. When the rotation angle reaches a preset threshold, the limiting part 30 contacts the outer wall of the bearing outer ring 1. Specifically, as shown... Figure 4 and Figure 5 As shown, the outer ring 1 of the bearing is located at the top of the column 5, and the bottom of the outer ring 1 is connected to the top of the column 5. When the main beam 4 rotates clockwise, the limiting part 30 on the right side of the main beam 4 flips downward until it contacts the right outer wall of the bottom of the outer ring 1. Similarly, when rotating counterclockwise, the limiting part 30 on the left side of the main beam 4 flips downward until it contacts the left outer wall of the bottom of the outer ring 1, thus preventing further rotation through rigid contact. (It is worth noting that...) Figure 4 and Figure 5 The left and right directions shown refer to the positions of the limiting parts 30 located on the left and right sides after rotation. The axial spacing between the bearing inner ring 2 and the limiting assembly 3 avoids interference during installation and rotation, while the double constraint enhances the stability of the system.

[0036] Through the above technical solution, this application achieves limiting by the rigid contact between the limiting part 30 and the outer ring 1 of the bearing when the main beam 4 rotates. This design effectively prevents the main beam 4 from over-rotating under abnormal conditions such as strong winds and snow accumulation. At the same time, the bidirectional symmetrical limiting part 30 ensures that there is the same constraint capability in both directions of rotation, improving the system's adaptability in complex environments.

[0037] Furthermore, the limiting component 3 includes a limiting plate 31 and a U-bolt 32. The U-bolt 32 and the limiting plate 31 are assembled to form a main beam space, which is used to clamp the outer periphery of the main beam 4.

[0038] The two limiting parts 30 are respectively disposed at the left and right ends of the limiting plate 31.

[0039] After the U-bolt 32 is assembled with the limiting plate 31, a closed-loop clamping structure is formed, which stably constrains the main beam 4 within the main beam space. The limiting parts 30 extending from the left and right ends of the limiting plate 31 form symmetrical interference areas with the left and right sides of the bearing outer ring 1. When the main beam 4 rotates, one limiting part 30 contacts the bearing outer ring 1 to create a hard block, while the other side is in a non-interference state.

[0040] Specifically, during the rotation of the main beam 4, the mechanical interference between the limiting part 30 and the outer ring 1 of the bearing forms a rigid barrier, directly eliminating the risk of over-rotation of the main beam 4 due to abnormal torque. The combined clamping structure of the limiting plate 31 and the U-bolt 32 ensures that the limiting component 3 has no relative sliding on the surface of the main beam 4, avoiding a decrease in limiting accuracy due to frictional wear. The bidirectional symmetrical design of the limiting part 30 allows the main beam 4 to obtain equivalent limiting protection in both directions of rotation, preventing structural damage caused by unilateral impact. The adjustable clamping structure of the U-bolt allows the limiting component to adapt to main beams of different diameters, improving component versatility and installation efficiency.

[0041] Furthermore, the limiting part 30 includes a vertical part 301 and a horizontal part 302. The bottom end of the vertical part 301 is connected to the limiting plate 31, the top end of the vertical part 301 is connected to one end of the horizontal part 302, and the other end of the horizontal part 302 extends toward the outer ring 1 of the bearing. The horizontal part 302 is parallel to the axis of the main beam 4.

[0042] The vertical part 301 refers to the support structure perpendicular to the axis of the main beam 4. It can be implemented using stamped steel plates or welded steel structures, and is used to withstand the lateral shear force generated when the main beam 4 rotates and transfer the load to the limiting plate 31. The horizontal part 302 refers to the extension structure parallel to the axis of the main beam 4, and can be implemented using bending or casting processes. The extension structure of the horizontal part 302 forms a rigid contact with the outer wall of the bearing outer ring 1 to achieve rotation angle constraint. The L-shaped structure formed by the vertical part 301 and the horizontal part 302 can establish a three-dimensional limiting boundary through spatial geometry. The top connection can be designed with rounded corners to reduce stress concentration. Preferably, the limiting part 30 is integrally cast or stamped.

[0043] Specifically, when the main beam 4 rotates, the extended end of the horizontal section 302 gradually approaches the side wall at the connection between the outer ring 1 of the bearing and the column 5. When the main beam 4 rotates to the limited angle, the horizontal section 302 contacts the outer side wall of the outer ring 1 of the bearing. At this time, the vertical section 301 resists the torque of the main beam 4 continuing to rotate through its own bending stiffness. Since the horizontal section 302 remains parallel to the axis of the main beam 4, the contact surface is always perpendicular to the tangent direction of rotation, so that the contact stress is evenly distributed on the horizontal section 302.

[0044] Furthermore, the U-bolt 32 includes two straight sections 321 and a curved section 322. The two ends of the curved section 322 are respectively connected to the two straight sections 321, and the end of the straight section 321 away from the curved section 322 is threaded.

[0045] The limiting plate 31 is provided with two through holes 311, and the two straight column segments 321 pass through the two through holes 311 respectively and are connected to the nut 33.

[0046] The straight section 321 refers to the straight extension of the U-bolt 32, which can be implemented using a metal rod with external threads. The threaded structure enables a locking engagement with the nut 33. The curved section 322 refers to the curved transition portion of the U-bolt 32, which can be implemented using an arc-shaped metal structure matching the outer curvature of the main beam 4, forming a wrapping clamp by adhering to the outer surface of the main beam 4. The through hole 311 refers to the through hole opened on the limiting plate 31, which can be implemented using a circular or elliptical hole structure, used to guide the straight section 321 through the limiting plate. The nut 33 connects to the straight section 321 from the bottom of the limiting plate 31, generating preload through tightening.

[0047] Specifically, during installation, the curved section 322 of the U-bolt 32 encircles the outer surface of the main beam 4 to form a wrapping clamp. The straight section 321 passes through the through hole 311 of the limiting plate 31, and a clamping force is applied through the threaded engagement of the nut 33. When the nut 33 is tightened, the limiting plate 31 is pressed against the surface of the main beam 4 to form surface contact, while the curved section 322 of the U-bolt 32 generates a radial clamping force on the main beam 4. This dual force creates a rigid connection between the limiting component 3 and the main beam 4, preventing relative displacement caused by vibration. When the position of the limiting component 3 needs to be adjusted, simply loosen the nut 33 to move the limiting component 3 axially along the main beam 4. After adjustment, tightening the nut 33 restores the fixed state.

[0048] Furthermore, the outer ring 1 of the bearing is provided with a fisheye bearing cavity, and the inner ring 2 of the bearing is a spherical bearing, which can deflect relative to the axis of the fisheye bearing cavity.

[0049] Among them, a fisheye bearing cavity refers to the mounting cavity of the inner ring of a bearing with a spherical inner wall structure, and its inner surface is machined into a spherical profile. A spherical bearing refers to a bearing inner ring with a spherical outer surface structure, and its outer surface forms a sliding fit with the spherical inner wall of the fisheye bearing cavity.

[0050] The fisheye bearing cavity provides multi-dimensional freedom of movement for the spherical bearing. Specifically, when the photovoltaic tracking system's column 5 is erected on a sloping hillside, there is a deviation in verticality between adjacent columns. By mounting the main beam 4 on top of the two columns 5 using fisheye bearings (the outer ring 1 of the bearing is the fisheye bearing cavity, and the inner ring 2 of the bearing is a spherical bearing), the fisheye bearings will adaptively adjust the levelness of the main beam 4 under the action of gravity. This reduces the installation difficulty of the photovoltaic tracking system and ensures the operational effectiveness of the photovoltaic tracking system.

[0051] Furthermore, the bearing inner ring 2 is composed of two bearing inner ring components 21, which are semi-circular, and the two bearing inner ring components 21 are installed on the outside of the main beam 4.

[0052] The semi-annular bearing inner ring component 21 refers to a bearing inner ring component 21 with a semi-circular arc-shaped cross-section. Its inner diameter matches the outer diameter of the main beam 4. The two semi-annular bearing inner ring components 21 are combined to form a complete annular support structure. This design eliminates the need for the bearing inner ring 2 to be fitted along the axial direction of the main beam, allowing direct assembly from both sides of the main beam 4, thus solving the installation problem under space-constrained conditions.

[0053] Furthermore, the bearing outer ring 1 is composed of two bearing outer ring components 11, which are arranged opposite each other, and the bearing inner ring 2 is located between the two bearing outer ring components 11.

[0054] The split-type bearing outer ring 1 structure allows for alignment adjustment along the axial direction of the main beam 4 during installation. The front-to-back relative arrangement means that the two bearing outer ring components 11 are symmetrically distributed along the axial direction of the main beam 4, forming a fisheye bearing cavity that holds the bearing inner ring 2. The symmetrical layout can balance the bidirectional load generated during the operation of the main beam 4.

[0055] Specifically, the two bearing outer ring components 11 are connected by bolts to form a closed load-bearing structure. During assembly, the bearing inner ring 2 is first fitted onto the outside of the main beam 4, and then the two bearing outer ring components 11 are wrapped around the bearing inner ring 2 from the front and back and tightened.

[0056] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A limiting structure applied to the main beam of a photovoltaic tracking system, characterized in that: This includes the outer ring of the bearing, the inner ring of the bearing, the limiting assembly, the main beam, and the column; The outer ring of the bearing is installed on the top of the column, the inner ring of the bearing is fitted around the outer periphery of the main beam, and the inner ring of the bearing is rotatably installed inside the outer ring of the bearing. The limiting component is fitted onto the outer periphery of the main beam, and the inner ring of the bearing and the limiting component are arranged back and forth along the axial direction of the main beam; The limiting component includes two limiting parts, which are symmetrically arranged relative to the axis of the main beam. When the main beam rotates clockwise or counterclockwise, the two limiting parts rotate along the outer circumference of the bearing outer ring. The connection between the bearing outer ring and the column can limit the rotational movement of the limiting parts.

2. The limiting structure applied to the main beam of a photovoltaic tracking system according to claim 1, characterized in that: The limiting component includes a limiting plate and a U-bolt. The U-bolt and the limiting plate are assembled to form a main beam space, which is used to clamp the outer periphery of the main beam. The two limiting parts are respectively located at the left and right ends of the limiting plate.

3. The limiting structure applied to the main beam of a photovoltaic tracking system according to claim 2, characterized in that: The limiting part includes a vertical part and a horizontal part. The bottom end of the vertical part is connected to the limiting plate, the top end of the vertical part is connected to one end of the horizontal part, and the other end of the horizontal part extends toward the outer ring of the bearing. The horizontal part is parallel to the axis of the main beam.

4. The limiting structure applied to the main beam of a photovoltaic tracking system according to claim 3, characterized in that: The U-bolt includes two straight sections and a curved section. The two ends of the curved section are respectively connected to the two straight sections, and the end of the straight section away from the curved section is threaded. The limiting plate has two through holes, and the two straight column segments pass through the two through holes and are connected to the nuts.

5. A limiting structure for the main beam of a photovoltaic tracking system according to claim 4, characterized in that: The outer ring of the bearing is provided with a fisheye bearing cavity, and the inner ring of the bearing is a spherical bearing, which can deflect relative to the axis of the fisheye bearing cavity.

6. A limiting structure for the main beam of a photovoltaic tracking system according to claim 5, characterized in that: The bearing inner ring is composed of two bearing inner ring components, which are semi-circular, and the two bearing inner ring components are installed on the outside of the main beam.

7. A limiting structure for the main beam of a photovoltaic tracking system according to claim 6, characterized in that: The bearing outer ring is composed of two bearing outer ring components, which are arranged opposite each other. The bearing inner ring is located between the two bearing outer ring components.

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