A drive mechanism, a column, a transmission device and a flexible tracking support

Abstract

The application discloses a driving mechanism, a stand column, a transmission device and a flexible tracking support, and belongs to the technical field of photovoltaic power generation. The driving mechanism is used for driving a photovoltaic module installed above a cross beam to track the rotation of the sun, and comprises: a fixed end of a telescopic rod is fixed with the cross beam, and the other telescopic end is connected with a sliding pin; a rotation point of a slide rail relative to the cross beam is fixed; the sliding pin is slidably installed on the slide rail; a rotating shaft of a rotating disc is fixed relative to the rotation point of the cross beam; a far end of a first connecting rod is hinged with the sliding pin, and a near end of the first connecting rod is hinged on an eccentric position of the rotating disc; and a driving piece is used for driving the rotating disc to rotate. The application realizes the cooperative locking of the flexible tracking support with multiple structures, cooperates with three self-locking points, forms multiple protections, greatly improves the anti-deformation capability of the support under extreme wind load, and reduces the safety hidden danger.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, specifically to a drive mechanism, column, transmission device, and flexible tracking bracket. Background Technology

[0002] In the field of photovoltaic new energy, flexible tracking photovoltaic (PV) brackets are widely used because they can track the sun's trajectory by adjusting the angle of PV modules, thereby improving power generation efficiency. However, existing flexible tracking PV bracket solutions still have the following shortcomings in structural design and functional implementation:

[0003] Existing flexible tracking photovoltaic support solutions mostly use a geared motor installed on each column, and the geared motor must have a rotation function, which greatly increases the cost.

[0004] With only one self-locking point during self-locking protection, the safety redundancy and self-locking stability are relatively low, posing a safety hazard. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, this invention provides a drive mechanism, a column, a transmission device, and a flexible tracking bracket.

[0006] This invention adopts the following technical solution: a driving mechanism for driving photovoltaic modules mounted above a crossbeam to track the rotation of the sun, comprising:

[0007] The telescopic rod has one fixed end fixed to the crossbeam and the other telescopic end connected to a sliding pin.

[0008] The slide rail is fixed at its rotation point relative to the crossbeam; the sliding pin is slidably mounted on the slide rail.

[0009] A turntable, wherein the rotation axis of the turntable is fixed relative to the rotation point of the crossbeam;

[0010] The first link, the distal end of which is hinged to the sliding pin, and the proximal end of which is hinged to an eccentric position on the turntable;

[0011] A driving component is used to drive the turntable to rotate;

[0012] When the turntable rotates one revolution, the turntable pulls the sliding pin and the telescopic end of the telescopic rod back and forth on the slide rail through the first connecting rod, and then the telescopic rod drives the crossbeam to swing back and forth around the rotation point.

[0013] Preferably, when the distal end of the turntable driving first link moves away from or near the turntable axis to its limit position, the distal end of the first link abuts against one end of the slide rail and at this time the telescopic rod extends to its limit position.

[0014] Preferably, the telescopic rod includes a cylindrical body and a sliding rod that is slidably fitted inside the cylindrical body;

[0015] The cylinder is provided with a limiting groove that penetrates the cylinder and is arranged along the axial direction of the cylinder;

[0016] The slider is fixed to one end of the slide rod in the cylinder, and the two ends of the slider are slidably installed in the limiting grooves on the corresponding sides; when the slider slides to the two ends of the limiting groove, it corresponds to the extreme position of the extension or retraction of the telescopic rod.

[0017] Preferably, the cylinder is fixed vertically to the crossbeam, and the axis of the cylinder passes through the rotation point of the crossbeam; the end of the slide rod away from the cylinder is hinged to the sliding pin.

[0018] Preferably, the driving component includes a worm gear reducer, and a driving gear is fixed to the output shaft end of the worm gear reducer; the turntable is a driven gear, and the driven gear meshes with the driving gear.

[0019] Preferably, the driving component includes a geared motor, and a drive pulley is fixed to the output shaft end of the geared motor; the turntable is a driven pulley, and the driven pulley is connected to the drive pulley via a belt.

[0020] A column for mounting the drive mechanism includes two opposing A-frames, the top of which is fixedly connected to a pivot for rotating and mounting a crossbeam, the pivot being the rotation point of the crossbeam.

[0021] Each of the A-frames has a slide rail fixed in the middle, and the slide rail has an elongated groove in the middle; the two ends of the sliding pin are respectively slidably installed in the grooves on the slide rails on both sides.

[0022] Preferably, a support is fixed on one side of the A-frame; the rotation shaft of the turntable is rotatably mounted on the support, and the rotation shaft of the turntable is located on the extension line of the slide groove on the slide rail.

[0023] A flexible tracking bracket for mounting photovoltaic modules includes at least two longitudinally opposite drive mechanisms: at least two parallel load-bearing cables are anchored between the crossbeams on the two drive mechanisms, and the photovoltaic modules are mounted on the load-bearing cables.

[0024] A transmission device for transmitting power between laterally spaced flexible photovoltaic supports: including a second link, one end of which is hinged to a sliding pin on a drive mechanism, and the other end of which is hinged to a sliding pin on another drive mechanism;

[0025] Only one of the aforementioned drive components is installed in each set of horizontal flexible photovoltaic supports.

[0026] The beneficial effects of this invention are as follows:

[0027] Reduced hardware costs: When the turntable rotates one revolution in the same direction, the crossbeam can be driven to swing back and forth around the rotation point through the turntable, the first connecting rod, the slide rail, the sliding pin, and the telescopic rod, so that the left and right extreme angles of the crossbeam can be adjusted arbitrarily. That is, the turntable does not need to reverse, and the motor used by the turntable does not need to have the function of rotation, thus reducing the cost of the motor.

[0028] A multi-structure collaborative locking mechanism for the flexible tracking bracket is achieved. When locking the flexible tracking bracket is required, the first driving link is aligned with the extension line of the slide groove, and its distal end abuts against both ends of the slide groove, mechanically limiting the movement of the sliding pin. At this time, the slider of the telescopic rod abuts against both ends of the cylinder limiting groove, restricting the extension and retraction of the sliding rod and further fixing the angle of the crossbeam. Finally, the worm gear reducer itself has a reverse self-locking characteristic to prevent reverse power transmission. Through the cooperation of the three self-locking points, multiple protections are formed, which greatly improves the deformation resistance of the bracket under extreme wind loads and reduces safety hazards.

[0029] This system enables lateral linkage of the photovoltaic panel installation system. By hinged the sliding pins of adjacent lateral flexible tracking brackets through a second link, a group of lateral brackets can achieve synchronous adjustment with only one drive component. The power of the drive component is transmitted to multiple rows of brackets through a transmission chain of "drive gear → turntable → first link → sliding pin → second link," reducing the number of drive components and directly lowering hardware costs. The mechanical structure forces synchronization among multiple rows of brackets, avoiding adjustment errors that may occur with independent drives, improving the consistency of the photovoltaic panel array's tracking angle of the sun, and indirectly ensuring power generation efficiency. Attached Figure Description

[0030] 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.

[0031] Figure 1 This is a perspective view of a flexible tracking bracket according to the present invention.

[0032] Figure 2 This is a front view of a flexible tracking bracket according to the present invention.

[0033] Figure 3 This is a perspective view of the column and sliding pin assembly in this invention.

[0034] Figure 4 This is a perspective view of the crossbeam and telescopic rod assembly in this invention.

[0035] Figure 5 This is a perspective view of the flexible tracking bracket of the present invention in its assembled and used state.

[0036] Figure 6 This is a front view of the flexible tracking bracket of the present invention in its assembled and used state.

[0037] Figure 7 This is a top view of the flexible tracking bracket of the present invention in its assembled and used state.

[0038] Explanation of reference numerals in the attached diagram: 1. Crossbeam;

[0039] 2. Column; 21. A-frame; 211. Support; 22. Pivot;

[0040] 3. Telescopic rod; 31. Cylinder; 311. Limiting groove; 32. Sliding rod; 321. Sliding block;

[0041] 4. Sliding pin;

[0042] 5. Slide rail; 51. Slide groove;

[0043] 6. Worm gear reducer;

[0044] 7. Drive gear;

[0045] 8. Turntable;

[0046] 9. First link;

[0047] 101. Second connecting rod; 102. Photovoltaic module; 103. Load-bearing cable. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0050] Example 1:

[0051] like Figures 1 to 3 As shown, the present invention provides a driving mechanism for driving a crossbeam to swing around a rotation point. In this embodiment, the crossbeam is crossbeam 1.

[0052] Combined Figure 4 As shown, a support block with a through hole is welded to the middle position of the crossbeam 1, and the through hole of the crossbeam 1 is the rotation point. The telescopic rod 3 includes a cylinder 31 and a sliding rod 32 slidably fitted in the cylinder 31. The sliding rod 32 can reciprocate and extend within the stroke range of the cylinder 31. The cylinder 31 is perpendicular to the crossbeam 1 and welded to the support block. The axis of the cylinder 31 passes through the rotation point. The outer end of the sliding rod 32 has an opening and is fitted onto the sliding pin 4. A limiting groove 311 is provided on the cylinder 31, penetrating the cylinder 31. The limiting groove 311 is arranged along the axial direction of the cylinder 31. The inner end of the slide rod 32 is threaded with a slider 321, and the two ends of the slider 321 are slidably installed in the corresponding limiting grooves 311. Through the cooperation between the slider 321 and the limiting grooves 311, the relative rotation between the slide rod 32 and the cylinder 31 can be prevented, and the extension and retraction distance of the slide rod 32 can be limited. When the slider 321 slides to the two ends of the limiting grooves 311, it corresponds to the extreme position of the extension or retraction of the telescopic rod 3.

[0053] The sliding pin 4 is slidably installed in the slide groove 51 on the slide rail 5. When working, the sliding pin 4 moves along the slide groove 51, which can drive the telescopic rod 3 and the crossbeam 1 to rotate. The left and right limit positions of the sliding pin 4 correspond to the limit rotation angle of the crossbeam 1. The limit rotation angle of the crossbeam 1 is usually ±45° or ±60°.

[0054] Combination Figures 1 to 3 As shown, the turntable 8 rotates around its own axis. The proximal end of the first connecting rod 9 is hinged to an eccentric position on the turntable 8, and the distal end of the first connecting rod 9 is hinged to the sliding pin 4. When the turntable 8 rotates, it can drive the sliding pin 4 at the distal end of the first connecting rod 9 to slide back and forth along the sliding groove 51. In this embodiment, the driving component includes a worm gear reducer 6 fixed to the foundation by a mounting base, and a driving gear 7 is fixed to the output shaft end of the worm gear reducer 6; the turntable 8 is the driven gear, and the driven gear meshes with the driving gear 7.

[0055] Working principle:

[0056] The worm gear reducer 6 drives the turntable 8 to rotate via the drive gear 7. When the turntable 8 rotates one revolution, it pulls the sliding pin 4 and the telescopic end of the telescopic rod 3 back and forth on the slide rail 5 via the first connecting rod 9. In turn, the telescopic rod 3 drives the crossbeam 1 to swing back and forth around the rotation point. In this way, the turntable can drive the crossbeam to be arbitrarily adjusted between the left and right limit angles by rotating one revolution in the same direction, so as to achieve the tracking of the crossbeam 1 at a specific angle. In this embodiment, the turntable does not need to reverse, so the motor used by the turntable does not need to have the function of rotation, which reduces the cost of the motor.

[0057] In addition, when the turntable 8 drives the far end of the first connecting rod 9 away from or near the axis of the turntable 8 to the limit position, that is, when the first connecting rod 9 coincides with the slide groove 51 of the slide rail 5, the far end of the first connecting rod 9 just abuts against the right or left end of the slide groove 51, forming a limit self-lock; at this time, the telescopic rod 3 also just extends to the limit position, that is, the slider 321 abuts against the lower end of the limit groove 311 on the cylinder 31, forming a limit self-lock; combined with the locking function of the worm gear reducer, a three-self-locking protection structure is formed, which is safer and more reliable, and improves the wind protection capability of the flexible tracking bracket.

[0058] Example 2:

[0059] Based on the first embodiment described above, the difference between this second embodiment and the first embodiment is that the driving component includes a geared motor and a drive pulley fixed to the output shaft end of the geared motor. The turntable 8 is a driven pulley, and the driven pulley and the drive pulley are connected by a belt. Other driving structures that meet the above functions can also be selected as needed.

[0060] Example 3:

[0061] Based on the above embodiment one, this embodiment three provides a column 2 for installing the drive mechanism.

[0062] Combination Figures 1 to 3 As shown, the column 2 includes two opposing A-frames 21 fixed to the foundation. A pivot 22 is fixedly connected to the top of each A-frame 21, and the through-hole of the crossbeam 1 is rotatably mounted on the pivot 22, which is the rotation point of the crossbeam 1. A horizontally arranged slide rail 5 is welded to the middle of the A-frame 21, with an elongated horizontal groove 51 in the middle of the slide rail 5. The two ends of the sliding pin 4 are slidably installed in the grooves 51 on the slide rails 5 on both sides. A support 211 is welded to one side of one of the A-frames 21, and the rotation shaft of the turntable 8 is rotatably mounted on the support 211. The rotation shaft of the turntable 8 is located on the extension line of the groove 51 on the slide rail 5. The column 2 adopts a special A-frame structure, which facilitates the installation of the drive mechanism and related components.

[0063] Example 4:

[0064] Based on the above embodiment three, this embodiment four provides a flexible tracking bracket for mounting photovoltaic modules 102. Combined with... Figures 5 to 7As shown, the flexible tracking bracket includes multiple sets of drive mechanisms, columns, and transmission devices arranged in a matrix. The longitudinal drive mechanisms are arranged perpendicular to the crossbeams 1, and at least two parallel load-bearing cables 103 are anchored between adjacent longitudinal crossbeams 1. Photovoltaic modules 102 are mounted on the load-bearing cables 103. During operation, the flexible tracking bracket is driven by the drive components, causing the crossbeams 1 to reciprocate, which in turn drives the anchored load-bearing cables on the crossbeams 1 to reciprocate, thereby enabling the photovoltaic modules mounted on the load-bearing cables to track the sun and improve power generation efficiency.

[0065] Example 5:

[0066] Based on the above embodiment four, this embodiment five provides a transmission device for transmitting power between two adjacent drive mechanisms.

[0067] Combination Figures 5 to 7 As shown, the transmission device includes a second link 101 connecting two laterally arranged drive mechanisms. The laterally arranged drive mechanisms are all arranged in the same direction along the slide rail 5. One end of the second link 101 is hinged to a sliding pin 4 on one of the drive mechanisms, and the other end of the second link 101 is hinged to a sliding pin 4 on another laterally adjacent drive mechanism. Figure 7 The various drive mechanisms are linked together by the second link 101 to form a multi-row linkage mechanism. Only one set of drive components needs to be installed on each set of transverse drive mechanisms, which reduces costs. At the same time, the multiple rows of columns are connected together, making the structure more stable and reliable.

[0068] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A drive mechanism for driving a photovoltaic module (102) mounted above a crossbeam (1) to rotate in tracking the sun, characterized in that, include: The telescopic rod (3) has one fixed end fixed to the crossbeam (1) and the other telescopic end connected to a sliding pin (4). The slide rail (5) is fixed at its rotation point relative to the crossbeam (1); the sliding pin (4) is slidably mounted on the slide rail (5); Turntable (8), the rotation axis of which is fixed relative to the rotation point of the crossbeam (1); The first link (9) has its distal end hinged to the sliding pin (4) and its proximal end hinged to an eccentric position on the turntable (8). A driving component is used to drive the turntable (8) to rotate; When the turntable (8) rotates once, the turntable (8) pulls the sliding pin (4) and the telescopic end of the telescopic rod (3) back and forth on the slide rail (5) through the first connecting rod (9), and then the telescopic rod (3) drives the crossbeam (1) to swing back and forth around the rotation point. The telescopic rod (3) includes a cylinder (31) and a slide rod (32) that is slidably fitted in the cylinder (31). A limiting groove (311) is provided on the cylinder (31) and is arranged along the axial direction of the cylinder (31). The slider (32) is fixed to one end of the cylinder (31) with a slider (321). The two ends of the slider (321) are slidably installed in the limiting groove (311) on the corresponding side. When the slider (321) slides to the two ends of the limiting groove (311), it corresponds to the extreme position of the extension or retraction of the telescopic rod (3). The cylinder (31) is fixed vertically to the crossbeam (1), and the axis of the cylinder (31) passes through the rotation point of the crossbeam (1); the end of the slide rod (32) away from the cylinder (31) is hinged to the slide pin (4).

2. The driving mechanism according to claim 1, characterized in that: When the turntable (8) drives the distal end of the first link (9) away from or near the axis of the turntable (8) to the limit position, the distal end of the first link (9) abuts against one end of the slide rail (5) and at this time the telescopic rod (3) extends to the limit position.

3. The driving mechanism according to claim 1, characterized in that: The driving component includes a worm gear reducer (6), and a drive gear (7) is fixed to the output shaft end of the worm gear reducer (6); the turntable (8) is a driven gear, and the driven gear meshes with the drive gear (7).

4. The driving mechanism according to claim 1, characterized in that: The driving component includes a geared motor, and a drive pulley is fixed to the output shaft end of the geared motor; the turntable (8) is a driven pulley, and the driven pulley is connected to the drive pulley by a belt.

5. A column for mounting the drive mechanism according to any one of claims 1 to 4, characterized in that: It includes two opposing A-frames (21), and the top of the two A-frames (21) is fixedly connected to a pivot (22) for rotating and installing the crossbeam (1). The pivot (22) is the rotation point of the crossbeam (1). Each of the A-frames (21) has a slide rail (5) fixed in the middle, and the slide rail (5) has an elongated groove (51) in the middle; the two ends of the sliding pin (4) are respectively slidably installed in the grooves (51) on the slide rails (5) on both sides.

6. A column according to claim 5, characterized in that: A support (211) is fixed on one side of the A-frame (21); the rotation shaft of the turntable (8) is rotatably mounted on the support (211), and the rotation shaft of the turntable (8) is located on the extension line of the slide groove (51) on the slide rail (5).

7. A flexible tracking bracket for mounting photovoltaic modules (102), comprising at least two longitudinally opposite drive mechanisms as described in any one of claims 1 to 4, characterized in that: At least two parallel load-bearing cables (103) are anchored between the crossbeams (1) on the two drive mechanisms, and the photovoltaic module (102) is installed on the load-bearing cables (103).

8. A transmission device for transmitting power between the flexible tracking brackets of claim 7, which are arranged laterally at intervals, characterized in that: Includes a second link (101), one end of which is hinged to a sliding pin (4) on a drive mechanism, and the other end of which is hinged to a sliding pin (4) on another drive mechanism; Only one of the aforementioned drive components is installed in each set of lateral flexible tracking brackets.

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