A dual-axis tracking support with adjustable direction and reverse supporting force

Abstract

The present application relates to the technical field of solar photovoltaic power generation, and discloses a double-axis tracking support with adjustable direction and reverse supporting force, which comprises a supporting assembly and a pitch adjusting assembly; the supporting assembly is composed of a stand and a supporting frame connected through a rotary joint, and a photovoltaic panel assembly is installed on the supporting frame; the pitch adjusting assembly comprises four steel wires located around the supporting frame and a pitch adjusting driving assembly, one end of the steel wires is connected to the supporting frame, and the other end is connected to the driving assembly. By controlling one retraction and one extension of the steel wires on the opposite sides through the driving assembly, the supporting frame can be driven to rotate around the rotary joint as a fulcrum, so that the pitch angle of the photovoltaic panel assembly in the north-south and east-west directions is adjusted. The four steel wires are not only used for angle adjustment, but also can provide reverse tension to resist wind force, so that the wind resistance of the support is significantly improved; at the same time, the force receiving design is optimized through the lever principle, so that the load of the stand and the manufacturing cost are reduced, and the support is suitable for various photovoltaic power station scenes.

Description

Technical Field

[0001] This invention relates to the field of solar photovoltaic power generation technology, specifically to a dual-axis tracking bracket with adjustable direction and reverse support force. Background Technology

[0002] Currently, there are many types of photovoltaic (PV) mounting systems. Most on the market are fixed mounting systems, single-axis tracking systems have a small market share, while dual-axis tracking systems are less common. PV tracking systems are widely recognized as one of the most effective methods to improve PV power generation efficiency and reduce construction costs. Tracking systems ensure that the light-receiving surface of the flat-panel PV module is always directly facing the sun. Therefore, under the same irradiance conditions, the automatic angle adjustment mode can absorb more solar radiation energy than fixed-installation PV modules, thereby achieving the goal of reducing PV power generation costs.

[0003] However, existing dual-axis tracking brackets suffer from poor overall wind resistance due to structural design flaws. Therefore, although dual-axis tracking brackets can significantly improve the power generation of photovoltaic modules, their market application is limited. For example, invention patent CN116232198A discloses a photovoltaic omnidirectional dual-axis tracking bracket system. One end of an electric push rod is connected to the column, and the other end is connected to the support bracket of the photovoltaic module. The photovoltaic support bracket is connected to the column via a slewing support. The extension and retraction of the electric push rod controls and adjusts the pitch angle of the photovoltaic support bracket in the east-west or north-south direction, so as to ensure that the light-receiving surface of the flat photovoltaic module supported on the support bracket is always facing the sun.

[0004] These types of dual-axis tracking brackets typically share a common drawback: because their electric push rods must be close to the column and rely on the extension and retraction of the push rods to adjust the angle of the photovoltaic modules, the push rods can only provide extremely weak support. They can operate normally in windless or light wind conditions, but once they encounter strong winds, the photovoltaic modules and the supporting brackets can be overturned by the strong winds, causing damage to the entire photovoltaic power generation structure and resulting in significant economic losses. Summary of the Invention

[0005] To address the problems and shortcomings of the existing technology, this invention specifically proposes a dual-axis tracking bracket with adjustable direction and reverse support force. This invention involves pulling four steel wire ropes in four directions along the support frame of the photovoltaic panel module. One end of each steel wire rope serves as a connection point, and the other end is fixedly connected to the pitch adjustment drive assembly. The pitch adjustment drive assembly controls the extension and retraction of the corresponding steel wire ropes, enabling the support frame to rotate relative to the column in the north-south or east-west direction. This adjusts the north-south or east-west orientation of the photovoltaic panel module on the support frame to adapt to changes in the sun's position, allowing the photovoltaic panel module to absorb more solar radiation energy and increase power generation. The steel wire ropes of this invention not only adjust and control the orientation of the photovoltaic panel module but also provide a strong reverse tension for the photovoltaic panel module and support frame. This tension is effectively used to resist the lateral force brought by wind. Therefore, regardless of the wind direction, the entire pitch adjustment mechanism will have steel wire ropes in one or two directions relative to the wind providing resistance against wind force, thus protecting the entire photovoltaic support system from wind damage and demonstrating strong overall wind resistance.

[0006] To achieve the above-mentioned objectives, the technical solution of the present invention is as follows: This invention discloses a dual-axis tracking bracket with adjustable direction and reverse support force, the dual-axis tracking bracket comprising: Support components used to support photovoltaic panel modules; A pitch adjustment component used to adjust the north-south and east-west pitch angles of photovoltaic panel modules; wherein... The support assembly includes a column and a support frame. The column is fixed to the base, and the support frame is rotatably connected to the column via a rotary joint. Photovoltaic panel components are mounted on the support frame. The pitch adjustment assembly includes a pitch adjustment drive assembly and four steel wire ropes located around the support frame. One end of each of the four steel wire ropes is connected to the support frame, and the other end is fixedly connected to the pitch adjustment drive assembly. When the pitch adjustment drive assembly is activated, it drives two opposing steel wire ropes on the support frame to tighten and loosen, causing the support frame to rotate relative to the column with the rotary joint as the rotation fulcrum, thereby adjusting the pitch angle of the photovoltaic panel components on the support frame in the north-south or east-west direction.

[0007] Preferably, the pitch adjustment drive assembly includes four winches located around the support frame, each winch being connected to a steel wire rope on the support frame located on the same side or opposite side. When any two winches on opposite sides of the support frame are activated, they cause the two connected steel wire ropes to be wound and released respectively, causing the support frame to rotate relative to the column with a rotating joint as the pivot point, thereby adjusting the pitch angle of the photovoltaic panel assembly on the support frame in the north-south or east-west direction.

[0008] Preferably, the pitch adjustment drive assembly includes four drums located around the support frame, each drum being connected to a steel wire rope on the support frame located on the same side or opposite side. Two drums located on opposite sides of the support frame are mounted on a single drum shaft and driven to rotate by the same shaft. The steel wire ropes on the two drums are wound in opposite directions on their respective drums. The rotation of the drum shaft causes the two steel wire ropes wound in opposite directions on the two drums to be wound and unwound, thereby driving the support frame to rotate relative to the column with the rotary joint as the rotational support point, thus adjusting the pitch angle of the photovoltaic panel assembly on the support frame in the north-south or east-west direction.

[0009] Preferably, a reversing rotation mechanism is provided between the two drum shafts, and the reversing rotation mechanism is connected to a power source; the power source drives the reversing rotation mechanism to rotate, and the reversing rotation mechanism drives one of the drum shafts to rotate. The two steel wire ropes wound in opposite directions on the two drums on the drum shaft are wound and unwound respectively, driving the support frame to rotate relative to the column with the rotating joint as the rotation support point, so as to adjust the pitch angle of the photovoltaic panel module on the support frame in the north-south direction or the east-west direction.

[0010] Preferably, the reversing rotation mechanism includes a gear bracket and a first planetary gear and a second planetary gear mounted on the gear bracket, which can rotate synchronously with the gear bracket and rotate on their own axis. The gear bracket is connected to a gear ring for driving its rotation. The drum shaft includes a first drum shaft and a second drum shaft. A first gear is fixedly mounted on the first drum shaft, and the first gear meshes with the first planetary gear and the second planetary gear respectively. The second drum shaft meshes with a worm gear sleeve through a transmission mechanism. A second gear is fixedly connected to the worm gear sleeve, and the second gear meshes with the first planetary gear and the second planetary gear respectively. The gear ring drives the gear bracket to rotate, and the two planetary gears on the bracket rotate together with the bracket, driving the first gear and the second gear meshing with it to rotate together with the bracket. The first gear and the second gear respectively drive the first drum shaft and the worm sleeve fixedly connected to them to rotate. The transmission mechanism connected to the worm sleeve drives the second drum shaft to connect. The two steel wire ropes wound in the forward and reverse directions on the first drum shaft and the second drum shaft are respectively wound and unwound, driving the support frame to rotate relative to the column with the rotary joint as the rotation support point, so as to adjust the pitch angle of the photovoltaic panel module in the east-west direction and the north-south direction on the support frame. When the first drum shaft is braked, the two planetary gears rotate around their own axes, which in turn drive the second gear meshing with them to rotate around its own axis. The worm gear sleeve, which is fixedly connected to the second gear, drives the second drum shaft to rotate through the transmission mechanism. The two steel wire ropes wound in opposite directions on the two drums on the second drum shaft are wound and unwound respectively, which drives the support frame to rotate relative to the column with the rotating joint as the rotation support point, so as to adjust the east-west pitch angle of the photovoltaic panel components on the support frame. When the second drum shaft is braked, the two planetary gears rotate around their own axes, which in turn drive the first gear meshing with them to rotate around its own axis. The first gear drives the first drum shaft to rotate. The two steel wire ropes wound in opposite directions on the two drums on the first drum shaft are wound and unwound respectively, which drives the support frame to rotate relative to the column with the rotating joint as the rotation support point, so as to adjust the north-south pitch angle of the photovoltaic panel module.

[0011] Preferably, the transmission mechanism includes a first transmission gear, a second transmission gear, and a third transmission gear. The first and second transmission gears are fixed at both ends of the transmission shaft, and the first transmission gear meshes with a worm gear sleeve, while the second transmission gear meshes with a third transmission gear mounted on a second drum shaft.

[0012] Preferably, brakes are provided on each of the two drum shafts.

[0013] Preferably, the rotary joint is a universal joint or a ball joint assembly.

[0014] Preferably, the pitch adjustment assembly further includes a guide pulley, and after the wire rope is released from the pitch adjustment drive assembly, it passes over the guide pulley on one side and is connected to the support frame.

[0015] Preferably, the column is also provided with a stay cable, the other end of which is fixed to a fixed end on the ground. The beneficial effects of this invention are: 1. This invention utilizes steel wire ropes installed around the support frame, leveraging the tensile strength of these ropes to adjust the pitch angle of the photovoltaic panel modules in various directions. Simultaneously, the tensile strength of the steel wire ropes provides sufficient reverse support force to resist wind. In extreme weather conditions such as strong winds, regardless of wind direction, at least one or two steel wire ropes can directly resist the lateral shear force generated by the wind, effectively preventing the photovoltaic panel modules and support frame from being overturned, thus protecting the entire photovoltaic support system from wind damage. Therefore, the dual-axis tracking support system of this invention has strong overall wind resistance.

[0016] 2. In existing technologies, adjustment mechanisms such as electric actuators need to be installed close to the column, resulting in the column and related structures bearing a large load and necessitating the use of heavy steel to ensure strength. In this invention, however, the connection point between the steel wire rope and the support frame is far from the column. Therefore, based on the lever principle, the force it bears is significantly better than the existing design where the structure controlling the orientation of photovoltaic panels is close to the central column. This reduces the load on the column and support structure, while still providing sufficient tensile strength to withstand strong winds. Therefore, this invention reduces the amount of steel used in the column and other structures while maintaining structural strength, thereby lowering the overall manufacturing cost and processing difficulty of the tracking bracket, while also reducing the overall weight of the bracket for easier transportation and installation.

[0017] 3. This invention organically combines the tilt angle adjustment of photovoltaic panel modules with wind-resistant support functions through a steel wire rope structure. While satisfying the solar tracking function of photovoltaic panel modules, it also provides strong wind resistance. It does not require additional wind-resistant structural design, simplifies the overall structural design, and significantly reduces the manufacturing cost of the tracking bracket.

[0018] 4. In this invention, the two roller shafts are connected to the same power source via a reversing rotation mechanism. The entire device requires only one power input and control system to achieve rotation and control of the photovoltaic panel module in different directions. This simplifies the traditional system structure, which requires at least two sets of power inputs and controls, to a single set, significantly reducing equipment cost and complexity while improving system reliability and operating efficiency. This design not only reduces the space occupied by the power equipment but also lowers energy consumption and maintenance costs, providing an efficient and economical solution for multi-directional adjustment of photovoltaic panel modules.

[0019] 5. The column of the present invention is equipped with a diagonal steel wire rope, which further enhances the overall lateral stability of the tracking bracket and prevents the column from tilting or deforming under long-term load or wind force.

[0020] 6. In this invention, the steel wire rope, after exiting the pitch adjustment drive assembly, is connected to the support frame via a guide pulley. The guide pulley can change the direction of the steel wire rope according to the relative position of the support frame and the drive assembly, ensuring that the steel wire rope maintains a reasonable tension angle during winding and unwinding, avoiding local bending or friction caused by excessive angle. Furthermore, the guide pulley, through its constraint effect on the steel wire rope, eliminates swaying or deviation during winding and unwinding, ensuring a stable trajectory. This stability directly improves the accuracy of the photovoltaic panel module's angle adjustment, avoiding angle deviations caused by steel wire rope slack or swaying, ensuring that the photovoltaic panel module always accurately tracks the sun's position, thereby maintaining high power generation efficiency.

[0021] 7. The pitch adjustment component of the present invention has various structural forms, such as winches and double drum shafts, and has good adaptability to different application scenarios and working conditions. Attached Figure Description The foregoing and hereinafter detailed description of the invention becomes clearer when read in conjunction with the following drawings, in which: Figure 1 This is a structural diagram of a dual-axis tracking bracket according to the present invention; Figure 2 This is a structural diagram of another dual-axis tracking bracket of the present invention; Figure 3 This is a front view of the dual-axis tracking bracket of the present invention; Figure 4 A structural diagram showing the guide pulley configuration of the dual-axis tracking bracket of this invention; Figure 5 This is a top view of the reversing rotation mechanism of the present invention; Figure 6 This is a front sectional view of the reversing rotation mechanism of the present invention.

[0022] In the picture: 1. Support assembly; 2. Pitch adjustment assembly; 3. Drum; 4. Drum shaft; 5. Reversing rotation mechanism; 6. Transmission mechanism; 7. First gear; 8. Second gear; 9. Worm sleeve; 10. Gear ring; 11. Column; 12. Support frame; 13. Rotary joint; 21. No. 1 wire rope; 22. No. 2 wire rope; 23. No. 3 wire rope; 24. No. 4 wire rope; 25. Pitch adjustment drive assembly; 26. Guide pulley; 31. No. 1 drum; 32. No. 2 drum; 33. No. 3 drum; 34. No. 4 drum; 41. First drum shaft; 42. Second drum shaft; 51. Gear bracket; 52. First planetary gear; 53. Second planetary gear; 61. First transmission gear; 62. Second transmission gear; 63. Third transmission gear; 64. Transmission shaft; 100. Stay cable. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of this invention, several specific embodiments will be used to further illustrate the technical solutions for achieving the objectives of this invention. It should be noted that the technical solutions claimed by this invention include, but are not limited to, the following embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort should fall within the scope of protection of this invention.

[0024] Example 1 An embodiment of the present invention discloses a dual-axis tracking bracket with adjustable direction and reverse support force, as shown in the appendix to the specification. Figure 1-3 The dual-axis tracking bracket consists of two main parts: a support assembly 1 for supporting the photovoltaic panel module and a pitch adjustment assembly 2 for adjusting the north-south and east-west pitch angles of the photovoltaic panel module. The support assembly 1 includes a column 11 and a support frame 12. The column 11 is fixed to the ground, and the support frame 12 is rotatably connected to the column 11 via a rotating joint 13. The photovoltaic panel module for power generation is installed on the support frame 12. The pitch adjustment assembly 2 consists of a pitch adjustment drive assembly 25 and four steel wire ropes located around the support frame 12. The four steel wire ropes include a first steel wire rope 21, a second steel wire rope 22, a third steel wire rope 23, and a fourth steel wire rope 24. One end of each of the four steel wire ropes is connected to one side of the support frame 12, and the other end is fixedly connected to the pitch adjustment drive assembly 25.

[0025] The photovoltaic (PV) panel installed on support frame 12 is a power generation device that produces direct current (DC) electricity when exposed to sunlight. Since the sun's daily trajectory exhibits an azimuth change of "rising in the east and setting in the west" (east-west direction) and an altitude change of "highest at noon and lowest in the morning and evening" (north-south direction), it is necessary to adjust the east-west pitch angle (tracking azimuth angle) and the north-south pitch angle (tracking altitude angle) of the PV panel to ensure that its light-receiving surface always faces the sun, thereby absorbing more solar radiation energy under the same irradiance conditions and reducing the cost of photovoltaic power generation. In the embodiment described in this invention, the working principle and process of the dual-axis tracking bracket for adjusting the pitch angle of the PV panel on the support frame are as follows: (1) In the initial state, the sun rises from the eastern horizon, with an altitude angle close to 0° and an azimuth angle due east. At this time, under the initial setting of the pitch adjustment component 2, the support frame 12 is in a "low-angle eastward tilt" state: (1.1) East-West Direction Adjustment: The pitch adjustment drive component 25 is activated, driving the No. 4 steel wire rope 24 connected to the support frame 12 to wind up and the No. 2 steel wire rope 22 to release, thereby driving the support frame 12 to rotate relative to the column 11 with the rotating joint 13 as the rotation support point, so that the support frame 12 tilts eastward to adjust the east-west pitch angle of the photovoltaic panel component, so that the photovoltaic panel component faces the sun. (1.2) North-South Direction Adjustment: The pitch adjustment drive component 25 is activated, driving the No. 3 steel wire rope 23 connected to the support frame 12 to wind up and the No. 1 steel wire rope 21 to release, thereby driving the support frame 12 to rotate relative to the column 11 with the rotating joint 13 as the rotation support point, so that the support frame 12 tilts to the south (low angle) to adjust the north-south pitch angle of the photovoltaic panel component, so that the photovoltaic panel component adapts to the initial solar altitude angle.

[0026] (2) Morning period (when the sun rises and moves westward) (2.1) East-West pitch angle adjustment: As the sun moves from due east to southeast and due south (the azimuth angle gradually increases), the pitch adjustment drive component 25 initiates east-west direction control. Specifically, the pitch adjustment drive component 25 drives the No. 2 steel wire rope 22 to wind up and the No. 4 steel wire rope 24 to release. The two steel wire ropes pull the support frame 12, which slowly rotates westward with the rotating joint 13 as the fulcrum, ensuring that the light-receiving surface of the photovoltaic panel is always facing the sun.

[0027] (2.2) North-South Direction Adjustment: The solar altitude angle gradually increases (from 0° to the maximum angle at noon). The pitch adjustment drive component 25 controls the winding of the No. 1 steel wire rope 21 and the release of the No. 3 steel wire rope 23, which in turn pulls the support frame 12 to rotate northward, gradually raising the tilt angle of the photovoltaic panel component so that the light-receiving surface is perpendicular to the sunlight (reducing reflection loss).

[0028] (3) Noon When the sun reaches its noon position (due south azimuth and maximum altitude angle), the support frame 12 adjusts the east-west direction so that the photovoltaic panel module faces due south. At this time, the No. 2 and No. 4 steel wire ropes 24 are in a balanced tension state and there is no tightening or loosening action. For north-south orientation adjustment: the tilt angle of the photovoltaic panel module reaches the maximum value of the day, and the winding and unwinding state of steel wire ropes No. 1 and No. 3 is stable, ensuring that the light-receiving surface is perpendicular to the sunlight.

[0029] (4) Afternoon to sunset (4.1) Afternoon period (when the sun moves westward and descends) East-west direction adjustment: As the sun moves from due south to southwest and due west (the azimuth angle continues to increase), the pitch adjustment drive component 25 controls the No. 4 steel wire rope 24 to be wound up and the No. 2 steel wire rope 22 to be released, driving the support frame 12 to continue to rotate westward, tracking the change in the sun's position.

[0030] North-South Direction Adjustment: As the solar altitude angle gradually decreases, the pitch adjustment drive component 25 controls the winding of the No. 3 steel wire rope 23 and the release of the No. 1 steel wire rope 21, pulling the support frame 12 to rotate southward, reducing the tilt angle of the photovoltaic panel component, and always keeping the light-receiving surface facing the sun.

[0031] (4.2) Before sunset (when the sun is close to the horizon) With the solar altitude angle close to 0° and the azimuth angle due west, the photovoltaic panel modules return to a low-angle tilt in the north-south direction and face west in the east-west direction. Furthermore, all four steel cables are in a taut state. If there is a westerly or southwesterly wind, the steel cables on the east and south sides provide reverse support to ensure the stability of the entire dual-axis tracking support in a strong wind environment.

[0032] Understandably, the structure of the support frame 12 is typically matched to the shape of the photovoltaic panel modules it supports, usually being rectangular. Therefore, a steel wire rope is connected to each of the four sides of the rectangular support frame to adjust the east-west and north-south pitch angles of the support frame 12. The connection points of the steel wire ropes to the sides of the support frame are usually located at the midpoint of the side. Specifically, two steel wire ropes located on opposite sides of the rectangular support frame form an adjustment combination used to adjust the pitch angle of the support frame 12 in one direction. For example... Figure 2As shown, when the supported photovoltaic panel assembly is circular, the support frame 12 is circular in shape. For a circular support frame, four steel wire ropes are distributed relatively evenly around the support frame 12.

[0033] Furthermore, the column 11 can be directly fixed to the ground or a base can be installed on the ground and the column can be fixed to the base. Additionally, pre-embedded anchor bolts or expansion bolts can be used to fix the column 11.

[0034] Furthermore, the rotary joint 13 is generally a universal joint or ball joint assembly.

[0035] Example 2 This embodiment discloses a dual-axis tracking bracket with adjustable direction and reverse support force. For the pitch adjustment drive component 25, there are multiple options. In this embodiment, the pitch adjustment drive component 25 consists of four winches. The four winches are respectively installed around the rectangular support frame. The winches are connected to the steel wire ropes on the same side or opposite side of the support frame 12. For example, the first steel wire rope 21 is wound on the drum of the first winch, the second steel wire rope 22 is wound on the drum of the second winch, the third steel wire rope 23 is wound on the drum of the third winch, and the fourth steel wire rope 24 is wound on the drum of the fourth winch. The No. 1 winch, the No. 1 wire rope 21, the No. 3 winch, and the No. 3 wire rope 23 form an adjustment combination for the north-south pitch angle of the photovoltaic panel module. The No. 2 winch, the No. 2 wire rope 22, the No. 4 winch, and the No. 4 wire rope 24 form another adjustment combination for the east-west pitch angle of the photovoltaic panel module.

[0036] The above embodiments illustrate the connection between the winch and the wire rope on the same side. For the connection between the winch and the wire rope on the opposite side, it can be understood that wire rope 21 is wound on the drum of winch 3, wire rope 22 is wound on the drum of winch 4, wire rope 23 is wound on the drum of winch 1, and wire rope 24 is wound on the drum of winch 2. Although the connection methods between the wire ropes and the winches differ, the resulting adjustment combination is still the same as in the above embodiments, that is, the two wire ropes located on opposite sides of the support frame and the two winches combine to form an adjustment combination.

[0037] Furthermore, it is understandable that regardless of whether the winch is connected to the wire rope on the same side or the wire rope on the opposite side, the principle and process of driving the support frame 12 to rotate to adjust the photovoltaic panel module remain the same. For example, when winches No. 1 and No. 3 operate, wire rope 21 No. 1 and wire rope 23 No. 3 can be driven to either retract and release or release and retract, thereby adjusting the north-south pitch angle of the support frame 12; when winches No. 2 and No. 4 operate, wire rope 22 No. 2 and wire rope 24 No. 4 can be driven to either retract and release or release and retract, thereby adjusting the east-west pitch angle of the support frame 12. The specific pitch angle adjustment process of the support frame 12 can be referred to the description in Embodiment 1, and will not be elaborated here.

[0038] It should be noted that when the winch is connected to the wire rope on the opposite side, because the wire ropes cross, it is necessary to avoid contact between the wire ropes as much as possible to prevent wear or resistance, which would affect the pitch angle adjustment effect.

[0039] Example 3 This embodiment discloses a dual-axis tracking bracket with adjustable direction and reverse support force. This embodiment also illustrates another structural form of the pitch adjustment drive assembly 25, such as... Figure 1-3 As shown, the pitch adjustment drive assembly 25 includes a first drum 31, a second drum 32, a third drum 33, a fourth drum 34, a first drum shaft 41, and a second drum shaft 42. The four drums 3 are also located around the rectangular support frame. Each of the four drums 3 is connected to a wire rope on the support frame 12 on the same or opposite side. Two drums 3 located on opposite sides of the support frame 12 are mounted on the same drum shaft 4. The two wire ropes connecting the two drums 3 mounted on the same drum shaft 4 are wound in opposite directions on the corresponding drums 3. Each of the two drum shafts 4 has an independent power source to drive its rotation.

[0040] In the embodiment described in this invention, wire rope 21 is wound in the forward direction on drum 31, and wire rope 23 is wound in the reverse direction on drum 33. Drum 31 and drum 33 are fixed to a first drum shaft 41, which is mounted on a first drum shaft support and driven to rotate by a first power source. Wire rope 22 is wound in the forward direction on drum 32, and wire rope 24 is wound in the reverse direction on drum 34. Drum 32 and drum 34 are fixed to a second drum shaft 42, which is mounted on a second drum shaft support and driven to rotate by a second power source.

[0041] The power source drives the drum shaft 4 to rotate, causing the two steel wire ropes wound in opposite directions on the two drums 3 on the same drum shaft 4 to be wound and unwound respectively. This pulls the support frame 12 to rotate relative to the column 11 with the rotating joint 13 as the rotation support point, thereby adjusting the pitch angle of the photovoltaic panel module in the north-south or east-west direction. In the embodiment described in this invention, the first steel wire rope 21, the first drum 31, the third steel wire rope 23, and the third drum 33 form an adjustment combination, and the remaining second steel wire rope 22, the second drum 32, the fourth steel wire rope 24, and the fourth drum 34 form another adjustment combination. The specific pitch angle adjustment process can be referred to the description in Embodiment 1, and will not be elaborated here.

[0042] Similarly, the above embodiments illustrate the connection between the drum and the wire rope on the same side of the support frame 12. For the connection between the drum and the wire rope on the opposite side, please refer to Embodiment 2, which will not be described in detail here.

[0043] It should be noted that during installation, there is a height difference between the two drum shafts 4 to avoid interference between them. Furthermore, it is understandable that the power source for the drum shafts 4 can generally be a drive motor, a geared motor, a hydraulic motor, or a servo motor, etc., all of which achieve the same effect.

[0044] Example 4 This embodiment discloses a dual-axis tracking bracket with adjustable direction and reverse support force. This embodiment also illustrates one structural form of the pitch adjustment drive assembly 25. Based on Embodiment 3, this embodiment optimizes the input power structure of the two drum shafts 4, using a single power source to drive the rotation of both drum shafts 4. Specifically, a reversing rotation mechanism 5 is provided between the two drum shafts 4, and the reversing rotation mechanism 5 is connected to the power source. The power source drives the reversing rotation mechanism 5 to rotate, which in turn drives one of the drum shafts 4 to rotate. The two steel wire ropes wound in opposite directions on the two drums 3 on this drum shaft 4 are wound and unwound respectively, causing the support frame 12 to rotate relative to the column 11 with the rotating joint 13 as the rotation support point, thereby adjusting the pitch angle of the photovoltaic panel assembly on the support frame 12 in the north-south or east-west direction.

[0045] Furthermore, this embodiment provides a detailed description and explanation of the aforementioned reversing rotation mechanism 5, such as... Figure 5 and Figure 6As shown, the reversing rotation mechanism 5 includes a gear bracket 51 and a first planetary gear 52 and a second planetary gear 53 mounted on the gear bracket 51, which can rotate synchronously with the gear bracket 51 and rotate around their own axis. The gear bracket 51 is connected to a gear ring 10 for driving its rotation. The first drum shaft 41 passes through the gear bracket 51 and its two ends are connected to the drum 3 respectively. A first gear 7 is fixedly mounted on the first drum shaft 41, and the first gear 7 meshes with the first planetary gear 52 and the second planetary gear 53 respectively. The second drum shaft 42 is connected to the worm sleeve 9 through a transmission mechanism 6. A second gear 8 is fixed on the worm sleeve 9, and the second gear 8 meshes with the first planetary gear 52 and the second planetary gear 53 respectively. Furthermore, the transmission mechanism 6 includes a first transmission gear 61, a second transmission gear 62, and a third transmission gear 63. The first transmission gear 61 and the second transmission gear 62 are fixed at both ends of a transmission shaft 64. The first transmission gear 61 meshes with the meshing teeth on the worm sleeve 9, and the second transmission gear 62 meshes with the third transmission gear 63 mounted on the second drum shaft 42.

[0046] The gear ring 10 drives the gear carrier 51 to rotate, and the two planetary gears on the carrier rotate accordingly; wherein... When the first drum shaft 41 is braked, the two planetary gears rotate around their own axes, which in turn drive the second gear 8, which meshes with them, to rotate around its own axis. The worm sleeve 9 connected to the second gear 8 also rotates with the second gear 8. Then, under the meshing action of the worm sleeve 9, the first transmission gear 61, the transmission shaft 64, the second transmission gear 62, and the third transmission gear 63 are driven to rotate respectively. Finally, the third transmission gear 63 drives the second drum shaft 42 to rotate. The two steel wire ropes wound in the two drums 3 on the second drum shaft 42 in opposite directions are wound and unwound respectively, which drives the support frame 12 to rotate relative to the column 11 with the rotating joint 13 as the rotation support point, so as to adjust the east-west pitch angle of the photovoltaic panel assembly on the support frame 12. When the second drum shaft 42 is braked, the two planetary gears on the bracket rotate around their own axes, and drive the first gear 7 meshing with it to rotate around its own axis. The first gear 7 drives the first drum shaft 41 to rotate. The two steel wire ropes wound in the two drums 3 on the first drum shaft 41 in opposite directions are wound and unwound respectively, which drives the support frame 12 to rotate relative to the column 11 with the rotating joint 13 as the rotation support point, so as to adjust the north-south pitch angle of the photovoltaic panel module.

[0047] Therefore, brakes are usually provided on the first drum shaft 41 and the second drum shaft 42 to decelerate the drum shaft or keep it in a stopped state (not rotating).

[0048] In the embodiments described in this invention, the gear bracket 51 and the gear ring 10 are typically machined as a single unit. Furthermore, to improve the overall compactness and high integration of the dual-axis tracking support drive structure and simplify certain structural elements, the aforementioned reversing rotation mechanism 5, gear ring 10, first gear 7, second gear 8, and worm gear sleeve 9 are all integrated onto the first drum shaft support. The specific structure is as follows: The first spool shaft 41 is rotatably mounted on the first spool shaft support and can rotate on the first spool shaft support. The gear bracket 51 and the gear ring 10 are both sleeved on the first spool shaft 41 and can rotate relative to the first spool shaft 41. The first gear 7 mounted on the first spool shaft 41 is located in the gear bracket 51 and meshes with the first planetary gear 52 and the second planetary gear 53 inside the gear bracket 51. Further, the worm sleeve 9 is sleeved on the first spool shaft 41 and rotatably connected to one leg of the first spool shaft support. The first spool shaft 41 can rotate freely inside the worm sleeve 9. That is to say, one end of the first spool shaft 41 is rotatably mounted on one leg of the first spool shaft support, and the other end passes through the gear ring 10, the gear bracket 51, and the worm sleeve 9 in sequence and extends to the outside of the other leg of the first spool shaft support. The second gear 8 is fixedly mounted on the worm sleeve 9 and meshes with the first planetary gear 52 and the second planetary gear 53.

[0049] In the above structure, the axes of the first drum shaft 41, the worm sleeve 9, the gear ring 10, the gear bracket 51, the first gear 7, and the second gear 8 coincide with each other.

[0050] Based on the aforementioned integrated structural design, the overall volume is reduced, and the synchronous or individual driving of the first drum shaft 41 and the second drum shaft 42 is achieved by utilizing the positional distribution and connection relationships between the components. Furthermore, when installation requirements are met, the gear ring 10, the first gear 7 and second gear 8 of the reversing rotation mechanism 5, the worm gear sleeve 9, and the transmission mechanism 6 can all be housed inside the column 11 of the tracking bracket, making full use of the internal space of the column 11 and reducing the footprint of the tracking bracket during installation. Even when the column 11 is large enough, the drum shaft 4 and the drum 3 can be hidden inside the column 11, with only an opening on the column 11 for the wire rope to pass through. However, the dimensions of the column 11 must not only meet the strength requirements but also be controlled within a reasonable cost range. The column 11 is typically a steel column made of steel.

[0051] When the gear ring 10 drives the gear bracket 51 to rotate, the two planetary gears fixed on the bracket will first rotate with the bracket (i.e., rotate around the axis of the bracket). If neither the first drum shaft 41 nor the second drum shaft 42 is braked, the first gear 7 and the second gear 8 on the two drum shafts 4 will be driven to rotate with the bracket because they mesh with the two planetary gears. This will then drive the first drum shaft 41 and the worm sleeve 9 connected to them to rotate around their own axes, ultimately achieving the winding of the wire rope wound on each drum. For the movement of each component when the drum shaft 4 is braked, please refer to the description in the above embodiment; it will not be elaborated further here.

[0052] It is understood that the gear ring 10 is connected to a drive structure such as a drive motor, a geared motor, a hydraulic motor, or a servo motor through a bevel gear meshing with it. The gear ring 10 is driven to rotate by the aforementioned drive structure, and the bevel gear is usually mounted on the output shaft of the drive structure.

[0053] Similarly, the worm sleeve 9 and the second gear 8 can also be machined into an integrated structure.

[0054] Example 5 This embodiment discloses a dual-axis tracking bracket with adjustable direction and reverse support force, based on any of the above embodiments, such as Figure 4 As shown, the pitch adjustment assembly 2 also includes guide pulleys 26. The guide pulleys 26 are distributed on each side of the support frame 12. After the steel wire rope is released from the pitch adjustment drive assembly 25, it first passes around the guide pulley 26 on one side and then connects to the support frame 12.

[0055] In the embodiments described in this invention, the guide pulley 26 can change the direction of the wire rope according to the relative position of the support frame 12 and the drive assembly 2, so that the wire rope maintains a reasonable tension angle during the winding and unwinding process. Therefore, the force direction of the wire rope can be optimized, avoiding wear. Furthermore, it can also constrain the wire rope, eliminating swaying or deviation during winding and unwinding, ensuring a stable trajectory. This stability directly improves the accuracy of the photovoltaic panel module angle adjustment, avoiding angle deviations caused by wire rope slack or swaying, ensuring that the photovoltaic panel module always accurately tracks the sun's position, thereby maintaining high power generation efficiency.

[0056] It is worth mentioning that, to avoid a large pitch angle of the support frame 12 in a certain direction, which could lead to a large skew angle of the wire rope and weaken the reverse support force of the wire rope on the support frame 12 in high wind conditions, the optimal installation position of the guide pulley 26 is usually near the point directly below the connection point between the wire rope and the support frame, as shown in the figure. In this way, after the wire rope released from the pitch adjustment drive assembly 25 passes over the guide pulley 26 on one side and connects to the support frame 12, regardless of the pitch angle of the support frame 12, the entire wire rope is always taut and the tension provided by the wire rope is almost entirely applied in the vertical direction, providing a large reverse support force to the support frame 12 and maintaining stability in high wind conditions.

[0057] Furthermore, the guide pulley 26 can be fixed to the ground or a fixed base using pre-embedded anchor bolts or expansion bolts.

[0058] Furthermore, the column 11 is also equipped with a stay cable 100, the other end of which is connected to a fixed end on the ground. The stay cable 100 may be composed of parallel steel wires, parallel steel cables, single steel cables, steel wire ropes, closed steel cables, or solid steel bars. The stay cable 100 further enhances the lateral stability of the entire dual-axis tracking support, preventing the column 11 from tilting or deforming under long-term load or wind force.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to hinder the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A dual-axis tracking bracket with adjustable direction and reverse support force, characterized in that, It comprises two parts: a support assembly (1) for supporting the photovoltaic panel module and a pitch adjustment assembly (2) for adjusting the north-south and east-west pitch angles of the photovoltaic panel module; the support assembly (1) includes a column (11) and a support frame (12), the column (11) is fixed on the base, and the support frame (12) is connected to the column (11) via a rotating joint (13), and the photovoltaic panel module is mounted on the support frame (12); the pitch adjustment assembly (2) includes a pitch adjustment drive assembly (2... 5) and four steel wire ropes located around the support frame (12). One end of each of the four steel wire ropes is connected to the support frame (12), and the other end is fixedly connected to the pitch adjustment drive assembly (25). When the pitch adjustment drive assembly (25) is activated, it drives two opposing steel wire ropes on the support frame (12) to tighten and loosen, thereby causing the support frame (12) to rotate relative to the column (11) with the rotating joint (13) as the rotation support point, so as to adjust the pitch angle of the photovoltaic panel assembly on the support frame (12) in the north-south or east-west direction. The pitch adjustment drive assembly (25) includes four drums (3) located around the support frame (12), and the four drums (3) are respectively connected to steel wire ropes on the same side or opposite side; wherein, two oppositely arranged drums (3) are mounted on a drum shaft (4), and the two steel wire ropes on the two drums (3) are wound in opposite directions on the corresponding drums (3); the drum shaft (4) rotates, driving the two steel wire ropes wound in opposite directions on the two drums (3) to be wound in and out respectively, driving the support frame (12) to rotate relative to the column (11) with the rotating joint (13) as the rotation support point, so as to adjust the pitch angle of the photovoltaic panel assembly in the north-south direction or east-west direction on the support frame (12); There is a reversing rotation mechanism (5) between the two drum shafts (4), and the reversing rotation mechanism (5) is connected to the power source; the power source drives the reversing rotation mechanism (5) to rotate, and the reversing rotation mechanism (5) drives one of the drum shafts (4) to rotate. The two steel wire ropes wound in the forward and reverse directions on the two drums (3) on the drum shaft (4) are respectively wound and released, driving the support frame (12) to rotate relative to the column (11 with the rotating joint (13) as the rotation support point, so as to adjust the pitch angle of the photovoltaic panel assembly in the north-south direction or the east-west direction on the support frame (12); The reversing rotation mechanism (5) includes a gear bracket (51) and a first planetary gear (52) and a second planetary gear (53) mounted on the gear bracket (51) that can rotate synchronously with the gear bracket (51) and rotate on their own axis. The gear bracket (51) is connected to a gear ring (10) for driving its rotation. The drum shaft (4) includes a first drum shaft (41) and a second drum shaft (42). The first drum shaft (41) is fixedly provided with a first gear (7) that meshes with the first planetary gear (52) and the second planetary gear (53) respectively. The second drum shaft (42) is connected to a worm sleeve (9) through a transmission mechanism (6). The worm sleeve (9) is connected with a second gear (8) that meshes with the first planetary gear (52) and the second planetary gear (53). The gear ring (10) drives the gear carrier (51) to rotate, and the two planetary gears on the carrier rotate accordingly; wherein, When the first drum shaft (41) is braked, the two planetary gears rotate around their own axes and drive the second gear (8) meshing with them to rotate around its own axes. The worm sleeve (9) connected to the second gear (8) drives the second drum shaft (42) to rotate through the transmission mechanism (6). The two steel wire ropes wound in the two drums (3) on the second drum shaft (42) in opposite directions are wound and released respectively, which drives the support frame (12) to rotate relative to the column (11) with the rotating joint (13) as the rotation support point, so as to adjust the east-west pitch angle of the photovoltaic panel assembly on the support frame (12). When the second drum shaft (42) is braked, the two planetary gears rotate around their own axes and drive the first gear (7) meshing with them to rotate around its own axes. The first gear (7) drives the first drum shaft (41) to rotate. The two steel wire ropes wound in the forward and reverse directions on the two drums (3) on the first drum shaft (41) are wound and released respectively, which drives the support frame (12) to rotate relative to the column (11) with the rotating joint (13) as the rotation support point, so as to adjust the pitch angle of the photovoltaic panel module in the north-south direction. The transmission mechanism (6) includes a first transmission gear (61), a second transmission gear (62), and a third transmission gear (63). The first transmission gear (61) and the second transmission gear (62) are fixed at both ends of the transmission shaft (64), and the first transmission gear (61) meshes with the worm sleeve (9), while the second transmission gear (62) meshes with the third transmission gear (63) mounted on the second drum shaft (42).

2. The dual-axis tracking bracket with adjustable direction and reverse support force according to claim 1, characterized in that, Brakes are installed on the two drum shafts (4).

3. The dual-axis tracking bracket with adjustable direction and reverse support force according to claim 1, characterized in that, The rotary joint (13) is a universal joint or ball joint assembly.

4. The dual-axis tracking bracket with adjustable direction and reverse support force according to claim 1, characterized in that, The pitch adjustment assembly (2) also includes a guide pulley (26). After the wire rope is released from the pitch adjustment drive assembly (25), it passes around the guide pulley (26) on one side and is connected to the support frame (12).

5. The dual-axis tracking bracket with adjustable direction and reverse support force according to claim 1, characterized in that, The column (11) is also provided with a stay cable (100), and the other end of the stay cable (100) is fixed to a fixed end on the ground.

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