Driving device, solar tracking support system and driving method of solar tracking support system

Abstract

The invention discloses a driving device, a solar tracking support system and a driving method thereof, and the driving device comprises N driving units which are arranged in rows or columns at intervals in pairs, each driving unit comprises a main wheel, and N is a natural number greater than 1; the number of the worm transmission devices is N; the worm transmission device is in meshed transmission connection with the main wheel; the number of the second worms is N; the second worm is in meshed transmission connection with the worm transmission device; joints are fixed at the two ends of the second worm; a coupling; one end of the coupling shaft is connected to a joint at one end of a second worm; the other end of the coupling shaft is connected to a joint at one end of the other adjacent second worm; the (N-1) couplings and the N second worms form an auxiliary shaft under the connection of the joints; the motor is connected with the auxiliary shaft and used for driving the auxiliary shaft to rotate. The bearing capacity can be improved, synchronous rotation is guaranteed, a damper is not needed, and the problems of wind vibration and deflection torsion are solved.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaics, and in particular to a driving device, a solar tracking bracket system and a driving method thereof. Background Art

[0002] The solar tracking bracket system can drive the solar panels (or photovoltaic panels) to follow the direction of the sun, so that the solar panels always face the direction of the sun to maximize the light and increase the photoelectric conversion rate. The existing solar tracking bracket system is generally driven by one or more driving devices. Due to the existence of wind vibration, a damping device is installed. The damping device is installed between the driving devices to reduce the wind vibration (or wind vibration) of the tracking bracket system.

[0003] In the existing tracking bracket system, the tracking bracket system composed of a single drive device has serious wind vibration, large main shaft torque, and the high center of gravity of the tracking bracket system leads to unstable operation. Although the tracking bracket system composed of multiple drive devices can reduce a certain amount of wind vibration and reduce the main shaft torque, it also brings problems such as difficult synchronization of rotation or high cost, so that it is impossible to set a drive device at the node of each shaft span. Therefore, only a damping device can be set at this node to reduce the wind vibration of the tracking bracket. However, the damping device can only reduce a certain amount of wind vibration and cannot solve the problem of wind vibration. Moreover, once the damping device is damaged or blocked, it may cause the drive device to be overloaded and damaged, and eventually cause the entire tracking bracket system to be blocked or damaged.

[0004] See also Figure 1-Figure 2 As shown, the existing rotation and stabilization accessories of a tracking bracket system mainly consist of: a driving device 16', an electrical control synchronization device, a rotating main shaft 13' and a damper 15', and the disadvantages are as follows:

[0005] 1. The drive device is expensive, precise, easy to get into water, stall, have poor bearing capacity and durability.

[0006] 2. For the electrically controlled synchronization device, when there is only one sensor, the main shaft is deformed by the torsional force, which causes the drive device to rotate asynchronously. When there are multiple sensors, the sensors are expensive, and due to the difference in sensor accuracy, there is an error in the inclination angle at which the drive device stops, and the rotation is still asynchronous due to the uneven bearing capacity of the drive device.

[0007] 3. Damper device: It cannot output torque and cannot bear the load torque of the tracking bracket system. It can only reduce wind vibration. Once the damping device fails, the tracking bracket system will be blocked, eventually leading to the loss or shutdown of the entire system.

[0008] 4. Rotating main shaft: It plays the role of transmitting the torque of the driving device. Because the tracking bracket system is usually very long, the principal elastic deformation of the main shaft that is too long under load will increase, which is easy to produce wind vibration, easily lead to asynchronous tracking rotation and inconsistent inclination angles of photovoltaic modules. When the elastic deformation is too large, the photovoltaic modules are easy to break.

[0009] 5. See Figure 3-Figure 4 As shown, the existing tracking bracket system has a higher center of gravity 12' of the photovoltaic module 11' and a lower center of gravity 14' of the main shaft 13' (i.e., the rotating shaft). When the photovoltaic module 11' is rotated, as the inclination angle of the photovoltaic module 11' increases, the center of gravity deviates from the axis of the main shaft 13', so that the photovoltaic module 11' generates a deflection torque under gravity, and as the inclination angle increases, the deflection torque increases. The increase in the deflection torque increases the bearing capacity of the driving device, so the tracking bracket system is easily damaged in severe weather such as strong winds. Summary of the invention

[0010] In view of this, in order to solve the above-mentioned technical problems, the purpose of the present invention is to propose a driving device, a solar tracking bracket system and a driving method thereof. The solar tracking bracket system equipped with the driving device can improve the bearing capacity, ensure synchronous rotation, eliminate the need for a damper, and solve the problems of wind vibration and deflection torque.

[0011] The technical solutions adopted are:

[0012] A driving device, comprising:

[0013] The driving units are arranged in rows or columns with intervals of two each, and the number is N. One end of the driving unit is connected to a main shaft, and the main shaft is used to fix the photovoltaic module. The driving unit includes a main wheel; wherein N is a natural number greater than 1;

[0014] A worm gear transmission device, the number of which is N, corresponding to each other; the worm gear transmission device is meshingly connected with the main wheel;

[0015] The number of the second worms is N, which corresponds to each other. The second worms are meshed and connected with the worm transmission device. Joints are fixed at both ends of the second worms.

[0016] A coupling shaft, the number of which is N-1; one end of the coupling shaft is connected to a joint at one end of a second worm gear; the other end of the coupling shaft is connected to a joint at one end of another adjacent second worm gear; N-1 coupling shafts and N second worm gears are connected to form an auxiliary shaft under the connection of the joints;

[0017] A motor is connected to the auxiliary shaft and is used to drive the auxiliary shaft to rotate.

[0018] Furthermore, the worm transmission device includes a first worm, a first worm wheel, a second worm wheel and a third worm wheel; the first worm wheel is meshingly connected to the main wheel, and the first worm wheel is coaxially fixed with the second worm wheel; the second gear is meshingly connected to the first worm; the third worm wheel is mounted and fixed on the first worm; the third worm wheel is meshingly connected to the second worm.

[0019] Furthermore, the worm transmission device includes a gear box, the first worm, the second worm wheel and the third worm wheel are installed in the gear box, the second worm is inserted into the gear box, and the two end joints of the second worm extend out of the gear box.

[0020] Furthermore, a lubricating oil filling hole is provided on the gear box.

[0021] Furthermore, the driving unit further comprises a limiting wheel, which can roll on the inner side of the main wheel; the limiting wheel is fixed with a wheel axle; the wheel axle is fixedly connected to the gear box via a fixing block.

[0022] Furthermore, universal joints are fixed at both ends of the second worm.

[0023] Furthermore, a shaft hole is provided at the top end of the driving unit.

[0024] A solar tracking support system of the present invention is equipped with a driving device described in any of the above solutions.

[0025] Furthermore, the solar tracking bracket system is a flat single-axis tracking bracket system, wherein a flat single-axis is connected between the driving units; a photovoltaic module is fixed on the flat single-axis;

[0026] Or the solar tracking support system is a curved main axis solar tracking support system, wherein the curved main axis solar tracking support system is a system in which a curved main axis is connected between driving units; a photovoltaic module is fixed on the curved main axis;

[0027] Or the solar tracking support system is a flexible tracking support system. The flexible tracking support system has a plurality of flexible steel cables connected between the driving units; photovoltaic modules are fixed on the flexible steel cables;

[0028] Alternatively, the solar tracking support system is a spindle-free tracking support system, in which a plurality of spaced crossbeams are connected between the driving units; photovoltaic modules are fixed on the crossbeams.

[0029] The driving method of the solar tracking bracket system of the present invention comprises the following steps:

[0030] S1. The motor rotates, driving the auxiliary shaft to rotate;

[0031] S2. The auxiliary shaft rotates, driving N drive units to rotate synchronously, that is, driving the main wheels of N nodes to rotate synchronously;

[0032] S3. The main wheels of N nodes rotate synchronously, driving the photovoltaic modules to rotate synchronously.

[0033] The beneficial effects of the present invention are:

[0034] 1. The drive units are arranged in rows or columns with intervals of two each. There is a drive unit at each span node of the tracking bracket system. This structure makes the main shaft torque of the tracking bracket system evenly distributed, thereby improving the bearing capacity and stability of the main shaft of the tracking bracket.

[0035] 2. The worm gear transmission device is meshingly connected with the main wheel, and the worm gear transmission device is meshingly connected with the second worm. No matter in the rotating period or the stationary period, there is a large self-locking force. This strong self-locking force can make the tracking bracket system have sufficient holding force to resist the wind vibration caused by strong winds and improve the wind resistance of the tracking bracket system.

[0036] 3. The drive units of the present invention are mechanically connected by the joints of the second worm and the coupling shaft, and N-1 coupling shafts are connected to form an auxiliary shaft under the connection of N second worm shafts; plus the worm gear transmission device can have a large reduction ratio, so that each coupling shaft and the node between the coupling shafts of the tracking bracket system can stably maintain rotation synchronization. Each node includes a drive unit, a worm gear transmission device and a second worm shaft.

[0037] 4. Since each node between the coupling shafts of the tracking support system of the present invention is provided with a driving unit, a damping device is no longer required, thereby eliminating the possibility of the tracking support system being blocked, stuck or lost due to the damping device.

[0038] 5. Since each drive unit of the present invention can constitute an independent drive unit and can rotate synchronously, the use of transmission torque no longer requires the rotation of the main shaft, and the tracking bracket system can even be without a main shaft. Without the constraints of the main shaft driving torque problem, the rotation center of gravity of the tracking bracket system can be designed to be lower, so that the torque driving the tracking bracket system to rotate is more uniform and lighter.

[0039] 6. Due to the advantages of the independent driving unit of the present invention and its ability to rotate synchronously, the present invention can well solve the industry problems such as rotation synchronization and wind vibration of various types of tracking bracket systems such as flexible tracking bracket systems and spindle-free tracking bracket systems, making the present invention well compatible with and applicable to the above-mentioned various types of tracking bracket systems.

[0040] 7. The invention realizes synchronous rotation and driving through the auxiliary shaft formed, so that the structural center of gravity of the photovoltaic module can be coaxial with the main shaft axis. In this way, no matter what the inclination angle of the photovoltaic module is, the torque output by the driving device to the tracking bracket system is uniform, and the torque can be greatly reduced. In addition to overcoming the friction of the bearing, the torque output by the driving device to the tracking bracket system is theoretically close to zero. This advantage greatly improves the wind resistance and wind vibration resistance of the tracking bracket system and improves the durability and stability of the tracking bracket system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of a tracking bracket system in the background technology.

[0042] Figure 2 It is a schematic diagram of the main structure of a tracking bracket system in the background technology.

[0043] Figure 3 It is a structural schematic diagram of the main axis and the photovoltaic component at one angle in the background technology.

[0044] Figure 4 It is a structural schematic diagram of the main shaft and the photovoltaic component in the background technology rotated to another angle.

[0045] Figure 5 This is a schematic diagram of the three-dimensional structure of a driving device of Example 1 including a driving unit and a worm gear device.

[0046] Figure 6 This is a schematic diagram of the three-dimensional structure of a driving device of Example 1, which includes a driving unit and a gear box.

[0047] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure of a driving device including a driving unit and a gear box shown from another angle.

[0048] Figure 8 This is a schematic structural diagram of a driving device of Example 1, which includes a driving unit, a worm gear transmission device and a coupling.

[0049] Fig. 9 This is a schematic diagram of the structure of forming an auxiliary axis in Example 1.

[0050] Fig.10 This is a schematic diagram of the three-dimensional structure of a solar tracking bracket system of Example 1.

[0051] Fig.11 This is a schematic diagram of the front structural view of a solar tracking bracket system of Example 1.

[0052] Fig.12This is a schematic diagram of the structure of the main axis and the photovoltaic module of Example 2 at one angle.

[0053] Fig.13 This is a schematic diagram of the structure in which the main shaft and the photovoltaic module of Example 2 are rotated to another angle.

[0054] Fig.14 This is a schematic diagram of the three-dimensional structure of a bent spindle tracking support system of Example 3.

[0055] Fig.15 This is a schematic diagram of the three-dimensional structure of a flexible tracking support system of Example 4.

[0056] Fig.16 This is a schematic diagram of the three-dimensional structure of a spindle-free tracking bracket system of Example 5.

[0057] Fig.17 It is a schematic diagram of the three-dimensional structure of Example 6 including a drive unit and a worm gear transmission device.

[0058] The serial numbers and corresponding feature names in the figure are as follows:

[0059] 1-drive unit; 2-worm gear transmission; 3-second worm; 4-coupling; 5-motor; 6-photovoltaic module; 7-auxiliary shaft;

[0060] 11-main wheel; 12-limiting wheel; 13-wheel axle; 14-fixed block; 21-first worm; 22-first worm wheel; 23-second worm wheel; 24-third worm wheel; 25-gear box; 26-lubricating oil filling hole; 31-connector. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] Example 1

[0063] See also Figure 5-Figure 11 As shown, a driving device comprises a driving unit 1, a worm gear 2, a second worm 3, a coupling shaft 4 and a motor 5.

[0064] The driving units 1 are arranged in rows or columns with spacing between them. The number of the driving units is N. One end of the driving unit is connected to the main shaft, and the main shaft is used to fix the photovoltaic component 6. The driving unit includes a main wheel 11. N is a natural number greater than 1.

[0065] The number of the worm gear transmission devices 2 is N, which corresponds to each other one by one. The worm gear transmission devices 2 are meshingly connected with the main wheel.

[0066] The second worm 3 has a number N corresponding to each other; the second worm 3 is meshed and transmission-connected with the worm transmission device 2; joints 31 are fixed at both ends of the second worm 3. As a specific implementation, the joint 31 of this embodiment is a universal joint 31.

[0067] The number of coupling shafts 4 is N-1; one end of the coupling shaft is connected to a joint at one end of a second worm gear; the other end of the coupling shaft is connected to a joint at one end of another adjacent second worm gear; N-1 coupling shafts 4 and N second worm gears 3 are connected to form an auxiliary shaft 7 under the connection of the joint 31;

[0068] The motor 5 is connected to the auxiliary shaft 7 and is used to drive the auxiliary shaft 7 to rotate.

[0069] As a specific implementation, the worm transmission device 2 of this embodiment includes a first worm 21, a first worm wheel 22, a second worm wheel 23 and a third worm wheel 24; the first worm wheel 22 is meshingly connected to the main wheel 11, and the first worm wheel 22 is coaxially fixed with the second worm wheel 23; the second gear 23 is meshingly connected to the first worm 21; the third worm wheel 24 is installed and fixed on the first worm 21; the third worm wheel 24 is meshingly connected to the second worm 3.

[0070] As a preferred specific embodiment, the worm transmission device 2 includes a gear box 25, the first worm 21, the second worm wheel 23 and the third worm wheel 24 are installed in the gear box 25, the second worm 3 is inserted into the gear box 25, and the two end joints of the second worm 3 extend out of the gear box 25.

[0071] Preferably, the gear box 25 is provided with a lubricating oil filling hole 26. Lubricating oil can be injected through the lubricating oil filling hole to lubricate, for example, the first worm and the second worm wheel.

[0072] As a preferred specific embodiment, the driving unit 1 further includes a limiting wheel 12, which can roll inside the main wheel 1; the limiting wheel 12 is fixed with a wheel axle 13; the wheel axle 13 is fixedly connected to the gear box 25 through a fixing block 14. The connection between the limiting wheel 12 and the gear box 25 can make the rotation of the main wheel 11 more stable.

[0073] As a preferred specific implementation manner, a shaft hole 15 is provided at the top end of the driving unit 1 .

[0074] The working process of the drive device is as follows:

[0075] The motor 5 starts, driving the auxiliary shaft 7 to rotate. The rotation of the auxiliary shaft 7 drives the second worm 3 at each node between the coupling shaft 4 to rotate. The rotation of the second worm 3 drives the third worm wheel 24 to rotate. The first worm 21 rotates synchronously, which in turn drives the second worm wheel 23 to rotate. The first worm wheel 22 rotates synchronously, which in turn drives the main wheel 11 to rotate.

[0076] Among them, the second worm drives the third worm wheel to reduce the rotation speed. At the same time, the second worm and the third worm wheel form a one-way self-locking anti-rotation structure. Due to the law of conservation of energy, the torque and speed of the second worm and the third worm wheel are: second worm speed * torque = third worm wheel speed * torque. A larger reduction ratio is formed between the second worm and the third worm wheel. At the same time, a larger torque output is also formed between the second worm and the third worm wheel. When the third worm wheel needs to rotate due to external force, because the teeth of the third worm wheel are engaged with the threads of the second worm and the friction between the two, the third worm wheel needs to use a larger torque to the second worm to reversely drive the second worm to increase the rotation speed. Therefore, at this time, as long as there is a smaller resistance on the second worm side, the rotation of the third worm wheel can be prevented.

[0077] As a specific application of the driving device, the shaft hole 15 of this embodiment is fixedly connected to the main shaft 16. The main shaft 16 is a flat single shaft, that is, a flat single shaft, and a photovoltaic module is fixed on the flat single shaft. In this way, the solar tracking bracket system equipped with the driving device of this embodiment is a flat single shaft tracking bracket system with a main shaft, such as Figure 10-11 shown. Fig.11 The arrow in the middle indicates one of the rotation directions during operation.

[0078] The driving method of the driving device is characterized in that the torque does not need to be transmitted through the main shaft, and the synchronous rotation of each driving unit can be ensured at the same time.

[0079] A driving method for a solar tracking bracket system comprises the following steps:

[0080] S1. The motor rotates, driving the auxiliary shaft to rotate;

[0081] S2. The auxiliary shaft rotates, driving N drive units to rotate synchronously, that is, driving the main wheels of N nodes to rotate synchronously;

[0082] S3. The main wheels of N nodes rotate synchronously, driving the photovoltaic modules to rotate synchronously.

[0083] That is, the working process of the solar tracking support system equipped with the driving device of this embodiment is as follows:

[0084] The motor rotates, driving the auxiliary shaft to rotate, and then driving each drive unit to rotate synchronously, that is, driving the main wheels of each node to rotate synchronously, driving the photovoltaic components 6 to rotate synchronously, thereby realizing solar energy tracking.

[0085] Since the worm gear transmission device is meshingly connected to the main wheel, and the worm gear transmission device is meshingly connected to the second worm, the worm gear transmission device is mainly composed of a worm and worm wheel, so it has a large self-locking force regardless of whether it is in the rotating period or the stationary period. This strong self-locking force can allow the tracking bracket system to have sufficient holding force to resist wind vibration caused by strong winds and improve the wind resistance of the tracking bracket system.

[0086] See also Figure 10-11 As shown, on the one hand, the drive units 1 are arranged in rows or columns with spacing of two, and there is a drive unit 1 on each span node of the tracking bracket system. This structure makes the torque of the main shaft 16 of the tracking bracket system evenly distributed, thereby improving the bearing capacity and stability of the main shaft of the tracking bracket.

[0087] On the other hand, each node between the coupling shafts 4 of the tracking support system of the present invention is provided with a driving unit 1, so a damping device (or damper) is no longer required, thereby eliminating the possibility of stalling, jamming or loss of the tracking support system caused by the damping device.

[0088] See also Figure 9-11 As shown, the driving units 1 are mechanically connected by the joint of the second worm 3 and the coupling 4, and N-1 couplings 4 are connected to form an auxiliary shaft 7; coupled with the worm gear transmission device, a larger reduction ratio is provided, so that each coupling and the node between the couplings of the tracking bracket system can stably maintain rotation synchronization.

[0089] Example 2

[0090] Referring to Example 1, the difference from Example 1 is that the shaft hole shape of this embodiment is different. Fig.12 and Fig.13 As shown, the structural center of gravity 61 of the photovoltaic module 6 is coaxial with the axis of the main shaft 16. Since synchronous rotation and driving are achieved through the formation of an auxiliary shaft, the structural center of gravity of the photovoltaic module and the rotating part can be coaxial with the axis of the main shaft. In this way, no matter what the inclination angle of the photovoltaic module is, the torque output by the drive device to the tracking bracket system is uniform, and the torque can be greatly reduced. In addition to overcoming the friction of the bearing, the torque output by the drive device to the tracking bracket system is theoretically close to zero. This advantage greatly improves the wind resistance and wind vibration resistance of the tracking bracket system and improves the durability and stability of the tracking bracket system.

[0091] Example 3

[0092] Referring to Example 1, the difference from Example 1 is that Fig.14 As shown, the main axis 16 of this embodiment is a bent main axis, and a photovoltaic module is fixed on the bent main axis; thus, the solar tracking bracket system of this embodiment is a bent main axis tracking bracket system.

[0093] Example 4

[0094] Referring to Example 1, the difference from Example 1 is that Fig.15 As shown, this embodiment has no main shaft, and multiple flexible steel cables 17 are connected between the drive units, and photovoltaic modules are fixed on the flexible steel cables; the solar tracking bracket system of this embodiment is a flexible tracking bracket system. Multiple means more than 2.

[0095] Generally, the flexible tracking bracket system has more stringent requirements for the synchronous rotation of each node, otherwise the angles of the solar panels will be different, which will affect the voltage matching between the solar panels and further affect the power generation. Therefore, the flexible tracking bracket system is more difficult to implement than the rigid bracket system. However, the present invention realizes the flexible tracking bracket system through the driving device of this embodiment 1.

[0096] Example 5

[0097] Referring to Example 1, the difference from Example 1 is that Fig.16 As shown, this embodiment has no main shaft, and multiple spaced beams 18 are connected between the drive units; photovoltaic modules are fixed on the beams. Multiple beams means more than 2 beams. In this embodiment, there are 2 beams. The solar tracking bracket system of this embodiment is a main shaft-free tracking bracket system.

[0098] Since each drive unit can constitute an independent drive unit and rotate synchronously, the use of transmission torque no longer requires the rotation of the main shaft. The tracking bracket system can even be without a main shaft. Without the constraints of the main shaft driving torque problem, the rotation center of gravity of the tracking bracket system can be designed to be lower, making the torque that drives the tracking bracket system to rotate more uniform and lighter.

[0099] Due to the advantages of an independent driving unit and being able to rotate synchronously, the present invention can well solve industry problems such as rotation synchronization and wind vibration of various types of tracking bracket systems such as the flexible tracking bracket system in Example 4 and the spindle-free tracking bracket system in this embodiment, making the present invention well compatible with and applicable to the above-mentioned various types of tracking bracket systems.

[0100] Example 6

[0101] Referring to Example 1, the difference from Example 1 is that Fig.17 As shown, the worm transmission device of the driving device of this embodiment does not include the first worm wheel and the second worm wheel, so that the first worm 21 is directly meshed and connected with the main wheel 11.

[0102] Example 7

[0103] Referring to Example 1, what is different from Example 1 is that the worm transmission device of the driving device of this embodiment does not include a second worm gear, so that the first worm gear is meshingly connected with the main wheel; at the same time, the first worm gear is also meshingly connected with the first worm, and the main wheel and the first worm are arranged up and down.

[0104] It should be noted that, for the sake of ease of description and understanding, the present invention describes the second worm separately from the worm transmission device, so that the worm transmission device does not include the second worm, in order to highlight the important connection role of the second worm. Of course, when necessary in certain situations, another description can also be made, for example, the second worm can also be included in the worm transmission device for description, so that the worm transmission device includes the second worm. This is just a difference in division and description, and should not affect the scope of protection of the present invention.

[0105] In addition, the serial numbers first, second, third, etc. in this specification are only for distinguishing the description and do not contain any order, and do not express or imply relative importance.

[0106] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A driving device, characterized in that: include: The driving units are arranged in rows or columns with two of them spaced apart, and the number of the driving units is N; the driving units include main wheels; wherein N is a natural number greater than 1; A worm gear transmission device, the number of which is N, corresponding to each other; the worm gear transmission device is meshingly connected with the main wheel; The number of the second worms is N, which corresponds to each other. The second worms are meshed and connected with the worm transmission device. Joints are fixed at both ends of the second worms. A coupling shaft, the number of which is N-1; one end of the coupling shaft is connected to a joint at one end of a second worm gear; the other end of the coupling shaft is connected to a joint at one end of another adjacent second worm gear; N-1 coupling shafts and N second worm gears are connected to form an auxiliary shaft under the connection of the joints; A motor is connected to the auxiliary shaft and is used to drive the auxiliary shaft to rotate.

2. The driving device according to claim 1, characterized in that: The worm transmission device includes a first worm, a first worm wheel, a second worm wheel and a third worm wheel; the first worm wheel is meshingly connected to the main wheel, and the first worm wheel is coaxially fixed with the second worm wheel; the second gear is meshingly connected to the first worm; the third worm wheel is installed and fixed on the first worm; the third worm wheel is meshingly connected to the second worm.

3. The driving device according to claim 1, characterized in that: The worm transmission device comprises a gear box, the first worm, the second worm wheel and the third worm wheel are installed in the gear box, the second worm is inserted into the gear box, and the two end joints of the second worm extend out of the gear box.

4. The driving device according to claim 3, characterized in that: The gear box is provided with a lubricating oil filling hole.

5. The driving device according to claim 3, characterized in that: The driving unit further comprises a limiting wheel, which can roll on the inner side of the main wheel; the limiting wheel is fixed with a wheel axle; the wheel axle is fixedly connected to the gear box via a fixing block.

6. The driving device according to claim 1, characterized in that: Universal joints are fixed at both ends of the second worm.

7. The driving device according to claim 1, characterized in that: The top end of the main shaft is provided with an axial hole.

8. A solar tracking bracket system, characterized in that: It is equipped with a driving device according to any one of claims 1-7.

9. The solar tracking support system according to claim 8, characterized in that: The solar tracking bracket system is a flat single-axis tracking bracket system, wherein a flat single-axis is connected between the driving units; a photovoltaic module is fixed on the flat single-axis; Or the solar tracking support system is a curved main axis solar tracking support system, wherein the curved main axis solar tracking support system is a system in which a curved main axis is connected between driving units; a photovoltaic module is fixed on the curved main axis; Or the solar tracking support system is a flexible tracking support system. The flexible tracking support system has a plurality of flexible steel cables connected between the driving units; photovoltaic modules are fixed on the flexible steel cables; Alternatively, the solar tracking support system is a spindle-free tracking support system, in which a plurality of spaced crossbeams are connected between the driving units; photovoltaic modules are fixed on the crossbeams.

10. A method for driving the solar tracking support system according to claim 9, comprising the following steps: S1. The motor rotates, driving the auxiliary shaft to rotate; S2. The auxiliary shaft rotates, driving N drive units to rotate synchronously, that is, driving the main wheels of N nodes to rotate synchronously; S3. The main wheels of N nodes rotate synchronously, driving the photovoltaic modules to rotate synchronously.

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