Double-shaft tracking device, double-shaft tracking support and photovoltaic street lamp

Abstract

The invention discloses a double-shaft tracking device, a double-shaft tracking support and a photovoltaic street lamp, the double-shaft tracking device comprises a base bottom plate, a pitch angle adjusting assembly, an azimuth angle adjusting assembly and a rotation supporting assembly, the pitch angle adjusting assembly comprises a first driving mechanism, a first turbine, a first connecting rod shaft and a gear transmission mechanism; the azimuth angle adjusting assembly comprises a second driving mechanism, a second turbine and a second connecting rod shaft; the first driving mechanism is used for driving the first turbine to rotate, the first turbine is connected with one end of the first connecting rod shaft, the other end of the first connecting rod shaft is connected with the gear transmission mechanism, and the gear transmission mechanism is connected with the rotary supporting assembly; the second driving mechanism is used for driving the second turbine to rotate, the second turbine is connected with one end of the second connecting rod shaft, and the other end of the second connecting rod shaft is connected with the rotating supporting assembly; the first connecting rod shaft penetrates through the second connecting rod shaft; the device is compact in structure in the height direction and high in space utilization rate.

Description

Technical Field

[0001] This invention relates to the field of concentrated photovoltaic equipment technology, and in particular to a dual-axis tracking device, a dual-axis tracking bracket, and a photovoltaic street light. Background Technology

[0002] In the field of concentrated photovoltaic (CPV) technology, dual-axis tracking devices are the core components for enabling photovoltaic modules to dynamically track the sun's azimuth and elevation angles, thereby improving light capture efficiency. The role of dual-axis tracking devices is even more critical in applications such as photovoltaic streetlights, which combine lighting and power generation functions. Photovoltaic streetlights rely on photovoltaic modules mounted on poles to generate electricity, needing to meet both lighting power requirements and maximize the use of outdoor sunlight resources. Dual-axis tracking is the core means to improve the power generation efficiency of these modules.

[0003] However, existing dual-axis tracking devices generally suffer from a structural defect of large vertical space occupation: their structural layout design focuses more on realizing the rotation function and does not fully consider the space requirements in height-limited scenarios, resulting in a large dimensional redundancy in the overall height direction of the device and high requirements for the height space of the installation environment. Specifically, in the application of photovoltaic street lights, this defect directly manifests as: it is difficult to achieve compact and high-density integration of photovoltaic modules within the limited height range of the light pole, and only 1-2 small-sized modules can be installed, thus wasting the vertical space of the light pole and making it difficult to ensure the long-term stable power generation performance of photovoltaic street lights.

[0004] Therefore, for scenarios such as photovoltaic streetlights where there are strict limitations on installation height and space, there is an urgent need to develop a new type of dual-axis tracking device with a compact structure in the height direction and high space utilization. Summary of the Invention

[0005] In view of this, the present invention provides a dual-axis tracking device, a dual-axis tracking bracket, and a photovoltaic street light to solve the problem that the existing dual-axis tracking devices have a non-compact structure, especially with a large space occupation in the height direction.

[0006] To achieve one or more of the above objectives or other objectives, the first aspect of the present invention provides a dual-axis tracking device for use in a concentrated photovoltaic system, comprising a base plate, a pitch angle adjustment assembly, an azimuth angle adjustment assembly, and a rotation support assembly. The pitch angle adjustment assembly comprises a first drive mechanism, a first turbine, a first connecting rod shaft, and a gear transmission mechanism. The azimuth angle adjustment assembly comprises a second drive mechanism, a second turbine, and a second connecting rod shaft.

[0007] The first drive mechanism and the second drive mechanism are respectively mounted on the base plate;

[0008] The first drive mechanism is used to drive the first turbine to rotate. The first turbine is connected to one end of the first connecting rod shaft, and the other end of the first connecting rod shaft is connected to the gear transmission mechanism. The gear transmission mechanism is connected to the rotation support assembly.

[0009] The second drive mechanism is used to drive the second turbine to rotate. The second turbine is connected to one end of the second connecting rod shaft, and the other end of the second connecting rod shaft is connected to the rotation support assembly.

[0010] The first connecting rod shaft passes through the second connecting rod shaft, and the first connecting rod shaft and the second connecting rod shaft are in clearance fit.

[0011] Furthermore, the rotating support assembly includes a rotating base, a supporting plate, a horizontal rotating shaft, and a photovoltaic module connector; the rotating base is fixedly connected to the other end of the second connecting rod shaft so as to rotate around the azimuth axis under the drive of the second connecting rod shaft; the supporting plate is vertically fixed to both ends of the rotating base, the horizontal rotating shaft is rotatably connected to the supporting plate, and the photovoltaic module connector is provided on the horizontal rotating shaft.

[0012] Furthermore, the gear transmission mechanism includes a first bevel gear and a second bevel gear that mesh with each other; the first bevel gear is interference-fitted to the other end of the first connecting rod shaft, and the second bevel gear is interference-fitted to one end of the horizontal rotating shaft, so that the photovoltaic module connecting seat rotates with the horizontal rotating shaft under the drive of the second bevel gear, thereby realizing pitch angle adjustment.

[0013] Furthermore, it also includes a support body, with bearings installed at its upper and lower ends respectively. The second connecting rod shaft passes through the support body and through the bearings, and the second connecting rod shaft is interference-fitted with the bearings. The bottom of the rotating base is located at the upper end of the support body. When the second connecting rod shaft rotates, the second connecting rod shaft drives the rotating base to rotate relative to the support body.

[0014] Furthermore, it also includes a first support leg and a second support leg, which are vertically mounted on the base plate and positioned opposite each other on both sides of the support body. The outer periphery of the support body is cubic, and the contact surface between the first support leg and the support body is rectangular, as are the contact surfaces of the second support leg and the support body.

[0015] Furthermore, the first drive mechanism includes a first motor, a first worm gear, a first motor mounting bracket, and a first worm gear connecting block. The first worm gear connecting block is fixed to the first support leg, the first motor mounting bracket is fixed to the base plate, the first motor is disposed inside the first motor mounting bracket, the first worm gear passes through the first worm gear connecting block and is connected to the output shaft of the first motor, and the first worm gear meshes with the first turbine.

[0016] Furthermore, the second drive mechanism includes a second motor, a second worm, a second motor mounting bracket, a second worm connecting block, and a motor support pad. The second worm connecting block is fixed to the second support leg, the motor support pad is fixed to the base plate, the second motor mounting bracket is fixed to the motor support pad, the second motor is disposed within the second motor mounting bracket, the second worm passes through the second worm connecting block and is connected to the output shaft of the second motor, and the second worm meshes with the second turbine.

[0017] Furthermore, the first turbine is disposed on the base plate, and the second turbine is disposed directly above the first turbine. A first turbine hole is formed at the center of the first turbine, and one end of the first connecting rod shaft is interference-fitted into the first turbine hole. A second turbine hole is formed at the center of the second turbine, and one end of the second connecting rod shaft is interference-fitted into the second turbine hole. The diameter of the first turbine hole is smaller than the diameter of the second turbine hole, and the second connecting rod shaft is a hollow shaft to allow the first connecting rod shaft to pass through.

[0018] A second aspect of the present invention provides a dual-axis tracking bracket, including a mounting base, a connecting portion, and the aforementioned dual-axis tracking device. A plurality of the dual-axis tracking devices are mounted on the mounting base, and the connecting portion is disposed at the bottom of the mounting base for connection with an external support device.

[0019] A third aspect of the present invention provides a photovoltaic street light, including a light pole, a luminaire, a photovoltaic module, and the aforementioned dual-axis tracking bracket, wherein one or more of the dual-axis tracking brackets are mounted on the light pole, the photovoltaic module is mounted on the top of the dual-axis tracking device of the dual-axis tracking bracket, the luminaire is disposed at the top of the light pole, and the photovoltaic module is electrically connected to the luminaire.

[0020] Implementing the embodiments of the present invention will have the following beneficial effects:

[0021] The dual-axis tracking device, dual-axis tracking bracket, and photovoltaic street light of this invention integrate two transmission shaft systems—one for pitch adjustment and the other for azimuth adjustment—into a single transmission unit by designing the second connecting shaft as a hollow structure and having the first connecting shaft pass through it axially. Compared to the traditional dual-axis tracking device's distributed layout, which requires reserving height space for two independent shaft systems, this invention significantly reduces the overall size of the device in the height direction, achieving a highly compact structure. This compact structure is particularly suitable for applications such as photovoltaic street lights where installation height is significantly limited. It allows for stable installation within limited height spaces such as light poles, while also reserving more space for photovoltaic modules. This enables the placement of more photovoltaic modules within the same height range, effectively increasing the installation density of concentrated photovoltaic systems and fully exploiting the potential for light energy utilization within limited space. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] in:

[0024] Figure 1 This is a schematic diagram of the structure of a dual-axis tracking device in one embodiment;

[0025] Figure 2 for Figure 1 A schematic diagram of the dual-axis tracking device after the support structure has been removed;

[0026] Figure 3 This is a partial structural diagram of the dual-axis tracking device in one embodiment (excluding the second connecting rod shaft, rotating base and support plate);

[0027] Figure 4 This is a schematic diagram of the structure of the support in one embodiment;

[0028] Figure 5 This is a schematic diagram of the structure of the first turbine in one embodiment;

[0029] Figure 6 This is a schematic diagram of the structure of the second turbine in one embodiment;

[0030] Figure 7 This is a schematic diagram of the assembly of the first turbine and the first connecting rod shaft in one embodiment;

[0031] Figure 8 This is a schematic diagram of the assembly of the rotating base and the second connecting rod shaft in one embodiment;

[0032] Figure 9 This is a partial structural schematic diagram of a dual-axis tracking device in one embodiment;

[0033] Figure 10 This is a schematic diagram of the mounting base and connecting part of a dual-axis tracking bracket in one embodiment;

[0034] Figure 11 This is a schematic diagram of the structure of a photovoltaic street light in one embodiment;

[0035] Figure 12 This is a partial structural schematic diagram of a dual-axis tracking bracket in one embodiment.

[0036] Explanation of the attached drawing numbers:

[0037] 1: Base plate;

[0038] 2: Pitch angle adjustment assembly; 21: First drive mechanism; 211: First motor; 212: First worm gear; 213: First motor mounting bracket; 214: First worm gear connecting block; 22: First turbine; 221: First turbine hole; 23: First connecting rod shaft; 24: Gear transmission mechanism; 241: First bevel gear; 242: Second bevel gear;

[0039] 3: Azimuth angle adjustment assembly; 31: Second drive mechanism; 311: Second motor; 312: Second worm gear; 313: Second motor mounting bracket; 314: Second worm gear connecting block; 315: Motor support pad; 32: Second turbine; 321: Second turbine hole; 33: Second connecting rod shaft;

[0040] 4: Rotating support assembly; 41: Rotating base; 42: Support plate; 43: Horizontal pivot; 44:

[0041] Photovoltaic module connector;

[0042] 5: Support body; 51: Bearing; 501: Bearing mounting hole;

[0043] 6: First supporting leg; 7: Second supporting leg;

[0044] 8: Mounting base; 81: Transverse connecting beam; 82: Longitudinal support beam; 9: Connecting part;

[0045] 100: Dual-axis tracking device; 200: Dual-axis tracking bracket; 300: Light pole; 400: Light fixture; 500: Photovoltaic module; 501: Mounting purlin. Detailed Implementation

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects and not to describe a particular order.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0049] Reference Figures 1-3 The present invention illustrates a dual-axis tracking device applied to a concentrated photovoltaic system. The device includes a base plate 1, a pitch angle adjustment component 2, an azimuth angle adjustment component 3, and a rotation support component 4. The pitch angle adjustment component 2 includes a first drive mechanism 21, a first turbine 22, a first connecting rod shaft 23, and a gear transmission mechanism 24. The azimuth angle adjustment component 3 includes a second drive mechanism 31, a second turbine 32, and a second connecting rod shaft 33. The base plate 1 is preferably made of galvanized steel plate or aluminum alloy, which has good corrosion resistance and structural strength and can meet the needs of long-term outdoor use.

[0050] The first drive mechanism 21 and the second drive mechanism 31 are respectively installed on the base plate 1. During installation, they can be fixed by bolts to the base plate 1 through the pre-set mounting holes, or by welding to achieve a stable connection.

[0051] like Figure 3As shown, the first drive mechanism 21 is used to drive the first turbine 22 to rotate. The first turbine 22 is tightly connected to one end of the first connecting rod shaft 23, which can be achieved by interference fit or key fit to avoid relative slippage between the two during transmission and ensure stable transmission of power. The other end of the first connecting rod shaft 23 is connected to the gear transmission mechanism 24, which is further connected to the rotating support assembly 4. This allows the power output by the first drive mechanism 21 to be transmitted to the rotating support assembly 4 in sequence through the first turbine 22, the first connecting rod shaft 23, and the gear transmission mechanism 24, ultimately achieving the pitch angle adjustment of the rotating support assembly 4.

[0052] like Figure 2 As shown, the second drive mechanism 31 is used to drive the second turbine 32 to rotate. The second turbine 32 and one end of the second connecting rod shaft 33 are also connected in a similar tight manner, which can be achieved by interference fit or key fit, to avoid relative slippage between the two during transmission and ensure stable transmission of power. The other end of the second connecting rod shaft 33 is directly connected to the rotating support assembly 4. When the second drive mechanism 31 drives the second turbine 32 to rotate, the second connecting rod shaft 33 will rotate synchronously with the second turbine 32 and drive the rotating support assembly 4 to rotate around the vertical direction, thereby realizing azimuth angle adjustment.

[0053] like Figure 8 As shown, the second connecting rod shaft 33 is a hollow structure, and the first connecting rod shaft 23 passes through the hollow cavity of the second connecting rod shaft 33 along the axial direction. The first connecting rod shaft 23 and the second connecting rod shaft 33 adopt a clearance fit design. The clearance fit can avoid frictional interference when the two rotate independently, ensuring that the pitch angle adjustment and azimuth angle adjustment can be carried out independently without affecting each other. At the same time, it ensures the coaxiality of the first connecting rod shaft 23 inside the second connecting rod shaft 33, reduces the eccentricity error in the transmission process, and improves the accuracy of dual-axis tracking.

[0054] In this embodiment, the first connecting shaft 23 passes axially through the hollow cavity of the second connecting shaft 33, forming a nested shaft structure. The first connecting shaft 23 drives the gear transmission mechanism 24 to operate through its own rotation, thereby adjusting the pitch angle of the rotation support component 4. The second connecting shaft 33 directly drives the rotation support component 4 to rotate as a whole through its own rotation, thereby adjusting the azimuth angle. This integrates the two transmission shaft systems that originally needed to be arranged separately into the same nested shaft structure. This nested shaft structure significantly reduces the space occupied by the device in the height direction: in the traditional structure, if dual-axis independent adjustment is to be achieved, installation height needs to be reserved for each of the two shaft systems, which can easily lead to excessive stacking of the overall structure. However, in this embodiment, the dual-axis function is integrated into the same nested shaft component, and only one set of shaft system installation space needs to be reserved in the height direction, which significantly reduces the overall height of the device. This makes it more suitable for scenarios with limited installation height, such as photovoltaic streetlights. It can be easily installed in the limited height space of the streetlight, and the stability problems caused by excessive height can be avoided. At the same time, more height space can be reserved for the arrangement of photovoltaic modules, making full use of the height advantage of the streetlight.

[0055] This embodiment integrates two transmission shaft systems—one for pitch adjustment and the other for azimuth adjustment—into a single transmission unit by designing the second connecting shaft as a hollow structure and having the first connecting shaft pass through it axially. Compared to the traditional dual-axis tracking device, which requires separate height space for each independent shaft system, this embodiment significantly reduces the overall size of the device in the height direction, achieving a highly compact structure. This compact structure is particularly suitable for applications with significant height restrictions, such as photovoltaic streetlights. It allows for stable installation within limited height spaces like light poles, while also reserving more space for photovoltaic modules. This enables the placement of more photovoltaic modules within the same height range, effectively increasing the installation density of concentrated photovoltaic systems and fully exploiting the potential for light energy utilization within limited space.

[0056] Reference Figures 1-2 In some specific embodiments, the rotating support assembly 4 of the dual-axis tracking device specifically includes a rotating base 41, a support plate 42, a horizontal rotating shaft 43, and a photovoltaic module connecting seat 44. Each component works in conjunction with the pitch angle adjustment assembly 2 and the azimuth angle adjustment assembly 3 to achieve dual-axis tracking support for the photovoltaic module. The bottom of the rotating base 41 is fixedly connected to the other end of the second connecting rod shaft 33, specifically, by means of bolt fastening, welding, etc. When the second drive mechanism 31 drives the second turbine 32 and the second connecting rod shaft 33 to rotate around the vertical direction (i.e., the azimuth axis), the rotating base 41 will rotate synchronously with the second connecting rod shaft 33, thereby driving the entire rotating support assembly 4 and the subsequently installed photovoltaic module to rotate together around the azimuth axis.

[0057] Two support plates 42 are provided, each vertically fixed to both ends of the rotating base 41. They can be integrally formed or fixed to both ends of the rotating base 41 by welding or bolting. The two ends of the horizontal rotating shaft 43 are rotatably connected to the two support plates 42 respectively. Specifically, mounting holes can be opened at corresponding positions on the support plates 42, and the two ends of the horizontal rotating shaft 43 can be inserted into the mounting holes. At the same time, the horizontal rotating shaft 43 cooperates with the gear transmission mechanism 24. When the first drive mechanism 21 drives the gear transmission mechanism 24 through the first turbine 22 and the first connecting rod shaft 23, the gear transmission mechanism 24 will drive the horizontal rotating shaft 43 to rotate around its own axis, thereby realizing the pitch angle adjustment of the photovoltaic module installed on it.

[0058] The photovoltaic module connector 44 and the horizontal rotating shaft 43 can be integrally formed or detachably connected. For example... Figure 1 and Figure 2 As shown, the top of the photovoltaic module connector 44 is a flat plate structure with threaded holes adapted to the mounting holes of the photovoltaic module; the bottom is an annular sleeve structure, which can be fitted and fixed to the horizontal rotating shaft 43 by interference fit. When installing the photovoltaic module, the photovoltaic module is fastened to the flat plate on the top of the connector 44 with bolts. When the horizontal rotating shaft 43 rotates around its own axis, the photovoltaic module connector 44 fitted on it will rotate synchronously with the shaft, causing the photovoltaic module to adjust its pitch angle. Combined with the azimuth angle adjustment driven by the rotating base 41, the photovoltaic module can finally achieve dual-axis precise tracking of the sun.

[0059] Reference Figure 1 and Figure 2 In some specific embodiments, the gear transmission mechanism 24 includes a first bevel gear 241 and a second bevel gear 242 that mesh with each other. The first bevel gear 241 and the second bevel gear 242 are placed vertically, and the two achieve the steering transmission of power in the vertical and horizontal directions through the meshing of the bevel teeth, thereby driving the photovoltaic module to complete the pitch angle adjustment.

[0060] The first bevel gear 241 is connected to the other end of the first connecting rod shaft 23 by an interference fit, thereby ensuring that there is no relative rotation between the first bevel gear 241 and the first connecting rod shaft 23, so that the power output by the first drive mechanism 21 is directly transmitted to the first bevel gear 241 through the first connecting rod shaft 23. The second bevel gear 242 is mounted on the horizontal rotating shaft 43, and one end of the second bevel gear 242 is also connected to the horizontal rotating shaft 43 by an interference fit, so that the photovoltaic module connecting seat rotates with the horizontal rotating shaft under the drive of the second bevel gear, realizing the pitch angle adjustment.

[0061] When the first drive mechanism 21 drives the first connecting shaft 23 to rotate via the first turbine 22, the first connecting shaft 23 will synchronously drive the first bevel gear 241 to rotate. Since the first bevel gear 241 and the second bevel gear 242 are bevel gears meshing, the rotation of the first bevel gear 241 will drive the second bevel gear 242 to rotate around the axis of the horizontal rotating shaft 43. The second bevel gear 242 is interference-fitted with the horizontal rotating shaft 43, so the horizontal rotating shaft 43 will rotate synchronously with the second bevel gear 242. The photovoltaic module connecting seat 44 is sleeved and fixed on the horizontal rotating shaft 43. Finally, driven by the second bevel gear 242, the photovoltaic module connecting seat 44 rotates together with the horizontal rotating shaft 43, thereby realizing the adjustment of the tilt angle of the photovoltaic module.

[0062] Reference Figure 1 and Figure 4 In some specific embodiments, the dual-axis tracking device also includes a support body 5, which provides rotational support for the second connecting rod shaft 33 and provides structural protection for the nested shaft structure formed by the first connecting rod shaft 23 and the second connecting rod shaft 33.

[0063] The support body 5 is a hollow columnar structure. Bearings 51 are installed at the upper and lower ends of the support body 5. Specifically, bearing mounting holes 501 are opened at the upper and lower ends of the support body 5, and bearings with covers are installed in the holes. The second connecting rod shaft 33 passes through the hollow cavity of the support body 5 and passes through the bearings 51 at the upper and lower ends in sequence. The inner ring of the second connecting rod shaft 33 and the bearing 51 are fitted with an interference fit to ensure that the inner ring of the bearing rotates synchronously when the second connecting rod shaft 33 rotates.

[0064] The bottom of the rotating base 41 is directly attached to the upper surface of the support body 5, and the two are engaged by planar contact. When the second drive mechanism 31 drives the second turbine 32 to rotate, the second connecting rod shaft 33 rotates synchronously with the second turbine 32. Since the second connecting rod shaft 33 is interference-fitted with the inner ring of the bearing and the outer ring of the bearing is fixed to the support body 5, the second connecting rod shaft 33 will drive the rotating base 41 to rotate relative to the upper surface of the support body 5, thereby realizing the azimuth angle adjustment of the rotating support assembly 4 and the photovoltaic module.

[0065] Reference Figure 1 and Figure 2In some specific embodiments, the dual-axis tracking device further includes a first support leg 6 and a second support leg 7, which provide lateral support for the support body 5 and the rotating support assembly 4 and transmission components above it, further improving the overall structural stability of the device. The first support leg 6 and the second support leg 7 are vertically installed on the base plate 1 by bolts or welding. The first support leg 6 and the second support leg 7 are arranged opposite each other on both sides of the support body 5, forming a stable clamping effect on the support body 5. The first support leg 6 and the second support leg 7 are L-shaped, and the outer periphery of the support body 5 is cubic. The contact surface of the first support leg 6 facing the support body 5 is rectangular, and the contact surface of the second support leg 7 facing the support body 5 is also rectangular. During installation, the rectangular contact surfaces of the first support leg 6 and the second support leg 7 are tightly fitted to two adjacent sides of the support body 5, respectively.

[0066] Reference Figure 3 In some specific embodiments, the first drive mechanism 21 includes a first motor 211, a first worm gear 212, a first motor mounting bracket 213, and a first worm gear connecting block 214. The first motor mounting bracket 213 is formed by bending steel plate or aluminum alloy plate, and has good rigidity and installation stability. It is fastened to the base plate 1 by bolts. The first motor 211 is disposed in the first motor mounting bracket 213 and fastened to the first motor mounting bracket 213 by bolts. The first worm gear connecting block 214 is fixed to the side of the first support leg 6 facing the first turbine 22 by bolts or welding. The connecting block has a through hole for passing through and supporting one end of the first worm gear 212. The other end of the first worm gear 212 is connected to the output shaft of the first motor 211.

[0067] Reference Figure 2 In some specific embodiments, the second drive mechanism 31 includes a second motor 311, a second worm gear 312, a second motor mounting bracket 313, a second worm gear connecting block 314, and a motor support pad 315. The second worm gear connecting block 314 is fixed to the second support leg 7, the motor support pad 315 is fixed to the base plate 1, the second motor mounting bracket 313 is fixed to the motor support pad 315, the second motor 311 is disposed inside the second motor mounting bracket 313, the second worm gear 312 passes through the second worm gear connecting block 314 and is connected to the output shaft of the second motor 311, and the second worm gear 312 meshes with the second turbine 32.

[0068] The motor support pad 315 is made of metal and is fixed to the base plate 1 by bolts. Its height can be adapted according to the meshing center distance between the second worm 312 and the second turbine 32 to ensure that the two mesh correctly. The other connection methods are basically the same as those of the first drive mechanism, and will not be described in detail here.

[0069] Reference Figure 1 , Figures 7-9 In some embodiments, the first turbine 22 is disposed on the base plate 1, and a first turbine hole 221 is formed in the center of the first turbine 22. One end of the first connecting rod shaft 23 is interference-fitted into the first turbine hole 221. The second turbine 32 is disposed directly above the first turbine 22, and the two are arranged coaxially vertically. A second turbine hole 321 is formed in the center of the second turbine 32, and one end of the second connecting rod shaft 33 is connected to the second turbine hole 321 by interference fit to ensure that the second turbine 32 and the second connecting rod shaft 33 rotate synchronously. The diameter of the first turbine hole 221 is smaller than the diameter of the second turbine hole 321, and the second connecting rod shaft 33 is designed as a hollow shaft structure, the diameter of its internal hollow cavity being slightly larger than the outer diameter of the first connecting rod shaft 23, so as to allow the first connecting rod shaft 23 to pass through the second connecting rod shaft 33 axially. When the first drive mechanism 21 and the second drive mechanism 31 are driven respectively, the first turbine 22 drives the first connecting rod shaft 23 to rotate independently, and the second turbine 32 drives the second connecting rod shaft 33 to rotate independently, thus achieving a highly compact dual-shaft transmission in conjunction with the nested shaft structure.

[0070] Reference Figures 10-12 This embodiment shows a dual-axis tracking bracket 200, which includes a mounting base 8, a connecting part 9, and a dual-axis tracking device 100 as described in any of the preceding embodiments. A plurality of dual-axis tracking devices 100 are mounted on the mounting base 8, and the connecting part 9 is disposed at the bottom of the mounting base 8 for connection with an external support device.

[0071] This embodiment achieves dual-axis tracking support for single or multiple photovoltaic modules, thereby improving the scalability of light capture. The mounting base 8 can be constructed from steel profiles through welding or bolting, possessing good structural strength and load-bearing capacity, and can adapt to outdoor wind loads and the self-weight of the photovoltaic modules. The mounting base 8 is composed of multiple transverse connecting beams 81 and multiple longitudinal support beams 82 spliced ​​together. The transverse connecting beams 81 are used to mount the dual-axis tracking device 100. For example, as... Figure 10 In the middle, the mounting base 8 is provided with transverse connecting beams 81 at both ends, and dual-axis tracking devices 100 are installed at both ends respectively. The base plate 1 of each dual-axis tracking device 100 is fixed to the mounting base 8 by bolt fastening.

[0072] The connecting part 9 is located at the bottom of the mounting base 8 and is used to connect with external support devices (such as the support column of a photovoltaic power station, the lamp post of a photovoltaic street light, etc.). The structure of the connecting part 9 is designed to adapt to the form of the external support: if the external support is a cylindrical lamp post, the connecting part 9 adopts a clamp structure, and the clamp is tightened with bolts to achieve fastening with the lamp post; if the external support is a square column, the connecting part 9 adopts a connecting plate with bolt holes, and is connected to the preset hole position of the column with bolts.

[0073] In this embodiment, the dual-axis tracking bracket integrates several sets of tracking devices through the mounting base 8, thereby improving the installation density of photovoltaic modules and the efficiency of light energy utilization within a unit space.

[0074] Reference Figure 11 This embodiment illustrates a photovoltaic street light, which includes a light pole 300, a luminaire 400, a photovoltaic module 500, and a dual-axis tracking bracket 200 as described in the previous embodiment. One or more of the dual-axis tracking brackets 200 are mounted on the light pole 300. The photovoltaic module 500 is mounted on the top of the dual-axis tracking device 100 of the dual-axis tracking bracket 200. The luminaire 400 is disposed at the top of the light pole 300. The photovoltaic module 500 is electrically connected to the luminaire 400. The dual-axis tracking bracket 200 drives the photovoltaic module 500 to accurately track the sun, thereby improving the light energy conversion efficiency and continuously supplying power to the luminaire 400.

[0075] In this embodiment, one or more dual-axis tracking brackets 200 are installed on the light pole 300. Preferably, there are multiple dual-axis tracking brackets 200, each spaced apart along the axial direction of the light pole 300. The spacing can be determined by considering the light pole height, the height of the dual-axis tracking bracket, and the size of the photovoltaic modules. The connecting part 9 (such as a clamp structure) of each dual-axis tracking bracket 200 is tightly secured to the light pole 300. By reducing the height of the dual-axis tracking bracket, more photovoltaic modules can be installed using the height space of the light pole, thereby improving solar energy utilization.

[0076] The photovoltaic module 500 is installed on the top of the dual-axis tracking device of the dual-axis tracking bracket. Specifically, bolts can be passed through the preset mounting holes on the mounting purlin 501 of the photovoltaic module 500 and fastened to the threaded holes on the photovoltaic module connecting seat 44. The photovoltaic module 500 can achieve precise dual-axis adjustment of azimuth and pitch angle with the dual-axis tracking device to maximize the capture of solar radiation energy.

[0077] The photovoltaic module 500 is electrically connected to the lamp 400. After the photovoltaic module 500 converts the captured light energy into electrical energy, it transmits it to the lamp 400 through the wires inside the lamp post 300 to directly power the lamp. At the same time, the system can be equipped with a storage battery (which can be installed at the bottom of the lamp post or near the dual-axis tracking bracket) to store the excess electrical energy of the photovoltaic module and ensure continuous lighting of the lamp during periods of no light (such as at night).

[0078] This embodiment of the photovoltaic street light utilizes multiple dual-axis tracking brackets installed along the height of the light pole. Due to the highly compact structural design of the dual-axis tracking device—with the first and second connecting rods nested together and the first and second turbines arranged coaxially and vertically—the space occupied by a single dual-axis tracking device and bracket in the height direction is significantly reduced. Therefore, within the limited height range of the light pole, multiple dual-axis tracking brackets can be arranged more densely, allowing for the installation of a larger number of photovoltaic modules. This embodiment of the photovoltaic street light fully utilizes the height space of the light pole, increasing the total light-receiving area of ​​the photovoltaic modules, improving light capture efficiency, and ultimately providing a more abundant and longer-lasting power supply for the lamp, thus improving the overall energy utilization efficiency and energy-saving effect of the photovoltaic street light.

[0079] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A dual-axis tracking device, characterized in that, The system is applied to a concentrated photovoltaic system and includes a base plate, a pitch angle adjustment component, an azimuth angle adjustment component, and a rotation support component. The pitch angle adjustment component includes a first drive mechanism, a first turbine, a first connecting rod shaft, and a gear transmission mechanism. The azimuth angle adjustment component includes a second drive mechanism, a second turbine, and a second connecting rod shaft. The first drive mechanism and the second drive mechanism are respectively mounted on the base plate; The first drive mechanism is used to drive the first turbine to rotate. The first turbine is connected to one end of the first connecting rod shaft, and the other end of the first connecting rod shaft is connected to the gear transmission mechanism. The gear transmission mechanism is connected to the rotation support assembly. The second drive mechanism is used to drive the second turbine to rotate. The second turbine is connected to one end of the second connecting rod shaft, and the other end of the second connecting rod shaft is connected to the rotation support assembly. The first connecting rod shaft passes through the second connecting rod shaft, and the first connecting rod shaft and the second connecting rod shaft are in clearance fit.

2. The dual-axis tracking device as described in claim 1, characterized in that, The rotating support assembly includes a rotating base, a support plate, a horizontal rotating shaft, and a photovoltaic module connector. The rotating base is fixedly connected to the other end of the second connecting rod shaft so as to rotate around the azimuth axis under the drive of the second connecting rod shaft. The support plate is vertically fixed to both ends of the rotating base, the horizontal rotating shaft is rotatably connected to the support plate, and the photovoltaic module connector is provided on the horizontal rotating shaft.

3. The dual-axis tracking device as described in claim 2, characterized in that, The gear transmission mechanism includes a first bevel gear and a second bevel gear that mesh with each other; the first bevel gear is interference-fitted to the other end of the first connecting rod shaft, and the second bevel gear is interference-fitted to one end of the horizontal rotating shaft, so that the photovoltaic module connecting seat rotates with the horizontal rotating shaft under the drive of the second bevel gear, thereby realizing pitch angle adjustment.

4. The dual-axis tracking device as described in claim 2, characterized in that, It also includes a support body, with bearings installed at its upper and lower ends respectively. The second connecting rod shaft passes through the support body and through the bearings, and the second connecting rod shaft is interference-fitted with the bearings. The bottom of the rotating base is located at the upper end of the support body. When the second connecting rod shaft rotates, the second connecting rod shaft drives the rotating base to rotate relative to the support body.

5. The dual-axis tracking device as described in claim 4, characterized in that, It also includes a first support leg and a second support leg, which are vertically mounted on the base plate and are positioned opposite each other on both sides of the support body. The outer periphery of the support body is cubic, and the contact surface between the first support leg and the support body is rectangular, as is the contact surface between the second support leg and the support body.

6. The dual-axis tracking device as described in claim 5, characterized in that, The first drive mechanism includes a first motor, a first worm, a first motor mounting bracket, and a first worm connecting block. The first worm connecting block is fixed to the first support leg, the first motor mounting bracket is fixed to the base plate, the first motor is disposed inside the first motor mounting bracket, the first worm passes through the first worm connecting block and is connected to the output shaft of the first motor, and the first worm meshes with the first turbine.

7. The dual-axis tracking device as described in claim 5, characterized in that, The second drive mechanism includes a second motor, a second worm, a second motor mounting bracket, a second worm connecting block, and a motor support pad. The second worm connecting block is fixed to the second support leg, the motor support pad is fixed to the base plate, the second motor mounting bracket is fixed to the motor support pad, the second motor is disposed inside the second motor mounting bracket, the second worm passes through the second worm connecting block and is connected to the output shaft of the second motor, and the second worm meshes with the second turbine.

8. The dual-axis tracking device as described in claim 1, characterized in that, The first turbine is disposed on the base plate, and the second turbine is disposed directly above the first turbine. A first turbine hole is opened in the center of the first turbine, and one end of the first connecting rod shaft is interference-fitted into the first turbine hole. A second turbine hole is opened in the center of the second turbine, and one end of the second connecting rod shaft is interference-fitted into the second turbine hole. The diameter of the first turbine hole is smaller than the diameter of the second turbine hole, and the second connecting rod shaft is a hollow shaft to allow the first connecting rod shaft to pass through.

9. A dual-axis tracking bracket, characterized in that, It includes a mounting base, a connecting part, and a dual-axis tracking device as described in any one of claims 1-8, wherein a plurality of the dual-axis tracking devices are mounted on the mounting base, and the connecting part is disposed at the bottom of the mounting base for connection with an external support device.

10. A photovoltaic street light, characterized in that, The device includes a light pole, a luminaire, a photovoltaic module, and a dual-axis tracking bracket as described in claim 9. One or more of the dual-axis tracking brackets are mounted on the light pole, the photovoltaic module is mounted on the top of the dual-axis tracking device of the dual-axis tracking bracket, the luminaire is disposed at the top of the light pole, and the photovoltaic module is electrically connected to the luminaire.

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