A photovoltaic device

Abstract

The application relates to a photovoltaic device, which comprises a first support, a plurality of rotating shafts, a plurality of photovoltaic panels, and a driving device. The driving device is connected with the rotating shafts through a transmission assembly to drive each rotating shaft to rotate around its own axis. The transmission assembly comprises a plurality of first rotating wheels, a plurality of second rotating wheels, a plurality of first rope sections, a plurality of second rope sections and a reciprocating traction seat. The transmission assembly for transmitting driving force to the photovoltaic panels is low in cost and high in reliability, can uniformly transmit torque to the rotating shafts for driving the photovoltaic panels, effectively prevents the rotating shafts and the photovoltaic panels from being twisted and deformed, and has a limiting function for the maximum rotating angle of the photovoltaic panels.

Description

Technical Field

[0001] This application relates to the field of photovoltaics, specifically to a photovoltaic device. Background Technology

[0002] Solar energy is being used more and more as a clean and renewable energy source, especially tracking photovoltaic power generation technology, which is an emerging solar energy utilization technology following conventional photovoltaic power generation technology.

[0003] Solar tracking systems can keep photovoltaic panels facing the sun as directly as possible, increasing the power generation of solar photovoltaic modules, effectively reducing the investment cost of photovoltaic power generation systems, and improving the utilization rate of solar photovoltaic modules.

[0004] Photovoltaic tracking systems that use multiple photovoltaic panels sharing a common support structure represent a future trend in solar tracking photovoltaic systems. Currently, commonly used tracking photovoltaic support structures primarily employ a single-motor linkage multi-point linkage structure, but this structure has many drawbacks:

[0005] For example, the parts are expensive, installation is inconvenient, and manual assembly is costly; the connecting rods in the transmission mechanism are very long, which can easily lead to twisting and deformation, reducing the lifespan of the tracking system; the transmission mechanism cannot evenly transmit the driving force provided by the drive device to the photovoltaic panel, which can cause the photovoltaic panel to be easily twisted and deformed or even structurally damaged; and the transmission mechanism itself does not have a limiting function for the transmission angle. If the motor's rotation angle is not properly controlled, the photovoltaic panel may collide with the bracket and be damaged. Summary of the Invention

[0006] In order to solve at least one of the above problems, this application proposes a photovoltaic device in which the transmission component for transmitting driving force to the photovoltaic panel is inexpensive and highly reliable, can transmit torque to the rotating shaft that drives the photovoltaic panel in a relatively balanced manner, effectively prevents the rotating shaft and the photovoltaic panel from twisting and deforming, and the transmission component has a limiting function for the maximum rotation angle of the photovoltaic panel.

[0007] The technical solution of this application is:

[0008] A photovoltaic device, comprising:

[0009] First support;

[0010] Multiple rotating shafts are arranged parallel to each other along a first direction, and each of the rotating shafts is connected to the first bracket in a manner that allows it to rotate about its own axis.

[0011] Multiple photovoltaic panels are arranged along the first direction, and each photovoltaic panel is fixed to one of the multiple rotating shafts in a corresponding manner; and

[0012] A driving device, which is connected to the plurality of rotating shafts via a transmission assembly, to drive each of the rotating shafts to rotate around its respective axis;

[0013] The transmission assembly includes:

[0014] Multiple first rotating wheels are coaxially fixed to multiple rotating shafts, and the multiple first rotating wheels are arranged in a first row at intervals along the first direction;

[0015] Multiple second rotating wheels are coaxially fixed to multiple rotating shafts in a one-to-one correspondence, and the multiple second rotating wheels are arranged in a second row at intervals along the first direction, wherein the second row is parallel to the first row;

[0016] Multiple first rope segments are connected to each of two adjacent first rotating wheels and between the two most end first rotating wheels, and one end of each of two adjacent first rope segments is wrapped around and fixed to the corresponding first rotating wheel in opposite directions.

[0017] Multiple second rope segments are connected between each pair of adjacent second spools and between the two outermost second spools, and one end of each pair of adjacent second rope segments is wrapped around and fixed to the corresponding second spool in opposite directions;

[0018] A reciprocating traction seat, which can reciprocate along the first direction under the drive of the driving device, wherein a first rope segment is fixedly connected to the reciprocating traction seat, and a second rope segment is fixedly connected to the reciprocating traction seat.

[0019] In an optional design, the transmission assembly further includes:

[0020] The lead screw seat fixed to the first bracket, and

[0021] A lead screw rotatably connected to the lead screw seat and extending along the first direction;

[0022] The driving device is a motor fixed on the lead screw seat to drive the lead screw to rotate. The reciprocating traction seat is connected to the lead screw seat in a manner that enables it to move along the first direction, and the reciprocating traction seat is threadedly connected to the lead screw.

[0023] In one alternative design, the lead screw seat includes two parallel guide rods extending along the first direction, and the reciprocating traction seat is movably connected to the two guide rods.

[0024] In one optional design, the transmission assembly further includes a plurality of first guide wheels and a plurality of second guide wheels rotatably connected to the first bracket;

[0025] For one of the plurality of first rope segments, one end of the first rope segment passes around the first first guide wheel and then around and is fixed to the first first rotating wheel, and the other end of the first rope segment passes around the second first guide wheel and then around and is fixed to the second first rotating wheel. The first rope segment extends along the first direction between the first first guide wheel and the second first guide wheel and is fixedly connected to the reciprocating traction seat.

[0026] For one of the plurality of second rope segments, one end of the second rope segment passes around the first second guide wheel and then around and is fixed to the first second rotating wheel. The other end of the second rope segment passes around the second second guide wheel and then around and is fixed to the second second rotating wheel. The second rope segment extends along the first direction between the first second guide wheel and the second second guide wheel and is fixedly connected to the reciprocating traction seat.

[0027] In one optional design, the first rope segment fixedly connected to the reciprocating traction seat includes a first sub-rope segment and a second sub-rope segment. One end of the first sub-rope segment is fixed to the reciprocating traction seat, and the other end is wrapped around and fixed to a corresponding first wheel. One end of the second sub-rope segment is fixed to the reciprocating traction seat, and the other end is wrapped around and fixed to another corresponding first wheel.

[0028] The second rope segment, which is fixedly connected to the reciprocating traction seat, includes a third sub-rope segment and a fourth sub-rope segment. One end of the third sub-rope segment is fixed to the reciprocating traction seat, and the other end is wrapped around and fixed to a corresponding second wheel. One end of the fourth sub-rope segment is fixed to the reciprocating traction seat, and the other end is wrapped around and fixed to another corresponding second wheel.

[0029] In an optional design, the transmission assembly further includes a plurality of first guide wheels and a plurality of second guide wheels rotatably connected to the first bracket. Each first rope segment has its two ends passing over two corresponding first guide wheels and then wrapping around and fixing to two corresponding first rotating wheels. Each second rope segment has its two ends passing over two corresponding second guide wheels and then wrapping around and fixing to two corresponding second rotating wheels. Each first rope segment extends along the first direction between two corresponding first guide wheels, and each second rope segment extends along the first direction between two corresponding second guide wheels.

[0030] In an optional design, the transmission assembly further includes at least one first guide wheel and at least one second guide wheel rotatably connected to the first bracket, each first guide wheel corresponding to one first rotating wheel, and each second guide wheel corresponding to one second rotating wheel;

[0031] At least two adjacent first rope segments have one end wrapped around the corresponding first guide wheel in opposite directions, and then around and fixed to the corresponding first rotating wheel in opposite directions, and the two are arranged in an X-shape between the corresponding first guide wheel and the first rotating wheel;

[0032] At least two adjacent second rope segments have one end that passes around the corresponding second guide wheel in opposite directions and then around and is fixed to the corresponding second rotating wheel in opposite directions, and the two are arranged in an X-shape between the corresponding second guide wheel and the second rotating wheel.

[0033] In one alternative design, at least two partially adjacent first rope segments are integrally connected, and the non-end positions of the two integrally connected first rope segments are fixed on the corresponding first wheel;

[0034] At least two adjacent second rope segments are integrally connected, and the non-end positions of the two integrally connected second rope segments are fixed on the corresponding second reel.

[0035] In one alternative design, each of the first rope segment and each of the second rope segments are steel wire ropes;

[0036] Each of the first rope segment and each of the second rope segments is connected in series with a resilient rope connector, or each of the first rope segment and each of the second rope segments is connected with a tensioning pulley.

[0037] In one optional design, under any working state, the sum of the circumference angles of one end of at least two partially adjacent first rope segments on the corresponding first wheel is less than 360 degrees, and the sum of the circumference angles of one end of at least two partially adjacent second rope segments on the corresponding second wheel is less than 360 degrees.

[0038] This application has at least the following beneficial effects:

[0039] 1. The transmission component used to transmit driving force to the photovoltaic panel in this photovoltaic device is mainly composed of low-cost ropes. Moreover, the ropes mainly bear tensile stress during use, making them highly reliable, not easily damaged, and with a long service life.

[0040] 2. During operation, the first and second rope segments on both sides are pulled synchronously by the same reciprocating traction seat, which to a certain extent ensures the balance of the tension on the first and second wheels on the shaft, thereby making the torsional force on both sides of the shaft tend to be balanced and preventing significant torsional deformation of the shaft and the photovoltaic panels on it.

[0041] 3. The various ropes and wheels in the transmission component of this photovoltaic device cooperate with each other using a specific structure. The mechanical structure of the transmission component itself can limit the rotation angle of the photovoltaic panel, thereby avoiding collisions between the photovoltaic panel and the support, ensuring the service life of the photovoltaic panel, and also facilitating the design of larger photovoltaic panel dimensions, especially length dimensions. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0043] Figure 1 This is a schematic diagram of the overall structure of the photovoltaic device in Embodiment 1 of this application.

[0044] Figure 2 yes Figure 1 A schematic diagram of the structure after the photovoltaic panels have been removed.

[0045] Figure 3 yes Figure 2 Mid-top view.

[0046] Figure 4 yes Figure 2 A partial structural diagram.

[0047] Figure 5 yes Figure 4 A partial structural diagram.

[0048] Figure 6 This is a schematic diagram of the structure of the first rotating wheel in Embodiment 2 of this application.

[0049] Figure 7 This is a schematic diagram of the structure of two adjacent first rope segments in Embodiment 2 of this application.

[0050] Figure 8 This is a schematic diagram of the connection structure between two adjacent first rope segments on the corresponding first rotating wheel in Embodiment 2 of this application. Explanation of reference numerals:

[0051] F1 - First direction;

[0052] 1-First support, 2-rotating shaft, 3-photovoltaic panel, 4-drive device, 5-reciprocating traction seat, 6-first rotating wheel, 7-second rotating wheel, 8-first rope segment, 9-second rope segment, 10-lead screw seat, 11-lead screw, 12-first guide wheel, 13-second guide wheel, 14-rope connector, 15-locking block;

[0053] 601 - Card Slot;

[0054] 801 - First sub-rope segment, 802 - Second sub-rope segment, 901 - Third sub-rope segment, 902 - Fourth sub-rope segment;

[0055] 1001-Guide rod. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0057] In the description of this application and the claims, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects. Furthermore, the words "one" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates not less than two.

[0058] In the description of this application and the claims, the terms "connection," "installation," "fixation," and "reception," unless otherwise specified, should be interpreted broadly. For example, "connection" can mean a separate connection or an integral connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean a non-detachable connection or a detachable connection. As another example, "reception" does not necessarily mean complete containment; this concept also includes the containment of a portion that protrudes externally. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application based on the specific circumstances.

[0059] In the description of this application and the claims, if terms such as "above," "below," or "horizontal" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, they are only for the purpose of clearly and simply describing this application, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. These directional terms are relative concepts used for relative description and clarification, and may change accordingly depending on the orientation of the components in the drawings. For example, if the device in the drawings is flipped, an element described as "below" other elements will be positioned "above" other elements.

[0060] In the description of this application and the claims, the terms "in sequence" or "in order," such as the phrase "A, B, C arranged in sequence," only indicate the order of arrangement of elements A, B, and C, and do not exclude the possibility of arranging other elements between A and B and / or between B and C.

[0061] In the description of this application and the claims, if there is a "direction" of motion, including motion with a directional component, the term "in direction" is not necessarily understood as motion only in that one direction. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application according to the specific circumstances.

[0062] Embodiments of this application will now be described with reference to the accompanying drawings.

[0063] <Example 1>

[0064] Figures 1 to 5 A specific embodiment of the photovoltaic device of this application is shown. The photovoltaic device includes a first support 1, a plurality of rotating shafts 2, a plurality of photovoltaic panels 3, and a driving device 4. Wherein:

[0065] Multiple rotating shafts 2 are arranged parallel to each other along a first direction F1, and each of the rotating shafts 2 is connected to a first support 1 in a manner that allows it to rotate around its own axis. The weight of the rotating shaft 2 is supported by the first support 1. In one specific embodiment, the first support 1 is provided with multiple bearing seats, and each rotating shaft 2 is connected to two corresponding bearing seats at both ends.

[0066] Multiple photovoltaic panels 3 are also arranged along the first direction F1, and each photovoltaic panel 3 is fixed to a corresponding rotating shaft 2. When the rotating shaft 2 rotates, the photovoltaic panels 3 fixed to the rotating shaft 2 rotate with it, thereby adjusting the angle of the photovoltaic panels 3 towards the light. The weight of the photovoltaic panels 3 is also supported by the first support 1.

[0067] The drive unit 4 is connected to multiple rotating shafts 2 through a transmission assembly to drive each rotating shaft 2 to rotate around its respective axis, thereby adjusting the angle of each photovoltaic panel 3.

[0068] The transmission assembly includes multiple first rotating wheels 6, multiple second rotating wheels 7, multiple first rope segments 8, multiple second rope segments 9, and a reciprocating traction seat 5. Wherein:

[0069] Multiple first rotating wheels 6 are coaxially fixed to multiple rotating shafts 2, and the multiple first rotating wheels 6 are arranged in a row with intervals along the first direction F1. For ease of description, this row containing the multiple first rotating wheels 6 is referred to as the first row.

[0070] Multiple second rotating wheels 7 are coaxially fixed to multiple rotating shafts 2 in a one-to-one correspondence, and the multiple second rotating wheels 7 are arranged in a row with intervals along the first direction F1. For ease of description, this row containing the multiple second rotating wheels 7 is referred to as the second row, which is parallel to the first row mentioned above.

[0071] A first rope segment 8 is connected between each pair of adjacent first rotating wheels 6 and between the two end pairs of first rotating wheels 6, and one end of each pair of adjacent first rope segments 8 is wrapped around and fixed to the corresponding first rotating wheel 6 in opposite directions.

[0072] Please refer to 2 and Figure 4 The phrase “surrounding and fixing in opposite directions” means that for two adjacent first rope segments 8, one end of one first rope segment 8 is surrounded and fixed to the corresponding first rotating wheel 6 in a clockwise direction, while one end of the other first rope segment 8 is surrounded and fixed to the first rotating wheel 6 in a counterclockwise direction. The two first rope segments 8 on the same first rotating wheel 6 are surrounded in opposite directions.

[0073] It is understandable that "around" includes both full circumference and partial circumference (such as half circumference or 1 / 8 circumference).

[0074] Since one end of each of the two adjacent first rope segments 8 (the first first rope segment 8 and the second first rope segment 8 respectively) is wrapped around and fixed to the corresponding first rotating wheel 6 in opposite directions, when the first first rope segment 8 pulls the first rotating wheel 6 to rotate and causes the first first rope segment 8 to be unwound from the first rotating wheel 6, the first rotating wheel 6 will necessarily wind up the second first rope segment 8.

[0075] A second rope segment 9 is connected between each pair of adjacent second wheels 7 and between the two end pairs of second wheels 7, and one end of each pair of adjacent second rope segments 9 is wrapped around and fixed to the corresponding second wheel 7 in opposite directions.

[0076] The reciprocating traction seat 5 can reciprocate along the first direction F1 under the drive of the drive device 4. One of the first rope segments 8 is fixedly connected to the reciprocating traction seat 5, and one of the second rope segments 9 is fixedly connected to the reciprocating traction seat 5.

[0077] Please refer to Figures 1 to 4 If you intend to Figure 1 Each photovoltaic panel 3 rotates counterclockwise around the axis of the rotating shaft 2 to the required tilt angle, which can then control the drive device 4 to drive the reciprocating traction seat 5. Figure 2 and Figure 4 As the rope moves to the left, the reciprocating traction seat 5 simultaneously pulls the first rope segment 8 and the second rope segment 9, which are fixed to it, to move to the left. The first rope segment 8, moving to the left, pulls... Figure 4 The first wheel 6 on the right rotates counterclockwise, pulling the second rope segment 9 which moves to the left. Figure 4 The second rotating wheel 7 on the right side rotates counterclockwise. Figure 4 The first wheel 6, rotating counterclockwise on the right side, and the second wheel 7, rotating counterclockwise on the right side, wind up the corresponding first rope segment 8 and second rope segment 9, thereby pulling them together. Figure 4 The first and second rotating wheels 6, not shown in the diagram, rotate counterclockwise on the right, thus pulling all the rotating shafts 2 to rotate counterclockwise (where...). Figure 2 The leftmost pivot 2 is pulled and rotated by the rightmost pivot 2 through the corresponding first rope segment 8, thereby driving... Figure 1 Rotate each of the three photovoltaic panels counterclockwise to the desired angle.

[0078] During the aforementioned adjustment process, since each rotating shaft 2 is coaxially fixed with a first rotating wheel 6 and a second rotating wheel 7 spaced apart from each other, both the first rotating wheel 6 and the second rotating wheel 7 apply rotational torque to the rotating shaft 2 under the pull of the rope. This improves the rotational smoothness of the rotating shaft 2, reduces the degree of torsional deformation of the rotating shaft 2 and the photovoltaic panel 3, and thus prevents deformation of the photovoltaic panel 3 fixed on the rotating shaft 2. Preferably, the first rotating wheel 6 and the second rotating wheel 7 are respectively connected to opposite ends of the rotating shaft 2. Moreover, during operation, the first rope segment 8 and the second rope segment 9 on both sides are pulled synchronously by the same reciprocating traction seat 5, thereby ensuring the balance of the tension on the first rotating wheel 6 and the second rotating wheel 7 on the rotating shaft 2 to a certain extent, and thus making the torsional force on both ends of the rotating shaft tend to be balanced, preventing significant torsional deformation of the rotating shaft and the photovoltaic panel on it.

[0079] In this embodiment, the drive device 4 drives the reciprocating traction seat 5 to reciprocate along the first direction F1 via a lead screw 11 mechanism. Specifically, the transmission assembly further includes a lead screw seat 10 and a lead screw 11. The lead screw seat 10 is fixed to the first bracket 1, and the lead screw 11 is rotatably connected to the lead screw seat 10, with the length of the lead screw 11 extending along the first direction F1. The reciprocating traction seat 5 is connected to the lead screw seat 10 in a manner capable of moving along the first direction F1, and the reciprocating traction seat 5 is threadedly connected to the lead screw 11. The drive device 4 is a motor fixed to the lead screw seat 10, which is connected to the lead screw 11 to drive the lead screw 11 to rotate, thereby causing the reciprocating traction seat 5, which is threadedly connected to it, to move along the first direction F1 via the rotating lead screw 11.

[0080] To improve the stability of the reciprocating traction seat 5 moving along the first direction F1, the aforementioned lead screw seat 10 also includes two parallel guide rods 1001 extending along the first direction F1, and the reciprocating traction seat 5 is movably connected to these two guide rods 1001.

[0081] Please refer to again Figures 1 to 4 To increase the rotatable angle of the photovoltaic panel 3 and prevent it from touching the first rope segment 8 or the second rope segment 9 and causing structural damage when rotating at large angles, the transmission assembly in this embodiment is also equipped with multiple first guide wheels 12 and multiple second guide wheels 13 rotatably connected to the first bracket 1. The two outermost first rotating wheels 6 correspond to the two first guide wheels 12 respectively, and each of the remaining first rotating wheels 6 corresponds to one first guide wheel 12. The two outermost second rotating wheels 7 correspond to the two second guide wheels 13 respectively, and each of the remaining second rotating wheels 7 corresponds to one second guide wheel 13. The two ends of each first rope segment 8 pass around the corresponding two first guide wheels 12 and then wrap around and fix to the corresponding two first rotating wheels 6. The two ends of each second rope segment 9 pass around the corresponding two second guide wheels 13 and then wrap around and fix to the corresponding two second rotating wheels 7. Moreover, guided and limited by the first guide wheel 12 and the second guide wheel 13, each first rope segment 8 extends along the first direction F1 between the corresponding two first guide wheels 12, and each second rope segment 9 extends along the first direction F1 between the corresponding two second guide wheels 13.

[0082] By guiding the main bodies of each first rope segment 8 and second rope segment 9 to a position separated from each rotating shaft 2 by a guide wheel and extending along the first direction F1, not only is the rotational interference of each rope segment on the photovoltaic panel 3 reduced, but the structural integrity of the photovoltaic device is also improved. It can be understood that if... Figure 2 and Figure 4 If the first guide wheel 12 and the second guide wheel 13 are removed, the range of rotation angles of the photovoltaic panel 3 will be greatly reduced.

[0083] Please refer to again Figure 2 and Figure 4 Furthermore, the reciprocating traction seat 5 is specifically fixedly connected to the first direction F1 extension portion of the corresponding first rope segment 8 and to the first direction F1 extension portion of the corresponding second rope segment 9. It can be understood that the direction of movement of the reciprocating traction seat 5 and the extension directions of the first rope segment 8 and the second rope segment 9 fixed to the reciprocating traction seat 5 are in the same direction, which helps to improve the working stability of the photovoltaic device.

[0084] Furthermore, please refer to... Figure 4The first rope segment 8, which is fixedly connected to the reciprocating traction seat 5, includes a first sub-rope segment 801 and a second sub-rope segment 802. One end of the first sub-rope segment 801 is welded to or fixed to the reciprocating traction seat 5 by a pin, and the other end passes around a corresponding first guide wheel 12 and then surrounds and is fixed to a corresponding first rotating wheel 6. One end of the second sub-rope segment 802 is welded to or fixed to the reciprocating traction seat 5 by a pin, and the other end passes around another corresponding first guide wheel 12 and then surrounds and is fixed to another corresponding second rotating wheel 7. It can be seen that in this embodiment, the first rope segment 8, which is fixedly connected to the reciprocating traction seat 5, is not a single integral structure, but is composed of two independent sub-rope segments. The advantage of this design is that it facilitates the installation of the first rope segment 8 on this photovoltaic device. Symmetrically, the second rope segment 9, which is fixedly connected to the reciprocating traction seat 5, includes a third sub-rope segment 901 and a fourth sub-rope segment 902. One end of the third sub-rope segment 901 is fixed to the reciprocating traction seat 5, and the other end passes around a corresponding second guide wheel 13 and then around and is fixed to a corresponding second rotating wheel 7. One end of the fourth sub-rope segment 902 is fixed to the reciprocating traction seat 5, and the other end passes around another corresponding second guide wheel 13 and then around and is fixed to another corresponding second rotating wheel 7.

[0085] In another embodiment, the first rope segment 8, which is fixedly connected to the reciprocating traction seat 5, is an integral structure. Its middle part is fastened to the reciprocating traction seat 5 by a locking block, and its two ends pass around the corresponding two first guide wheels 12 and then surround and fix to the corresponding two first rotating wheels 6. The second rope segment 9, which is fixedly connected to the reciprocating traction seat 5, is an integral structure. Its middle part is fastened to the reciprocating traction seat 5 by a locking block, and its two ends pass around the corresponding two second guide wheels 13 and then surround and fix to the corresponding two second rotating wheels 7.

[0086] As mentioned above, each of the first rotating wheels 6, except for the two at the very end, corresponds to a first guide wheel 12, and each of the second rotating wheels 7, except for the two at the very end, corresponds to a second guide wheel 13. This one-to-one correspondence between the first guide wheels 12 and the first rotating wheels 6, and between the second guide wheels 13 and the second rotating wheels 7, also has the following design features: Please refer to... Figure 2 and Figure 4Two adjacent first rope segments 8 have one end that passes around the corresponding first guide wheel 12 in opposite directions, and then around and is fixed to the corresponding first rotating wheel 6 in opposite directions. The two segments (i.e., the aforementioned two adjacent first rope segments 8) are arranged in an X-shape between the corresponding first guide wheel 12 and the first rotating wheel 6. Two adjacent second rope segments 9 have one end that passes around the corresponding second guide wheel 13 in opposite directions, and then around and is fixed to the corresponding second rotating wheel 7 in opposite directions. The two segments (i.e., the aforementioned two adjacent second rope segments 9) are arranged in an X-shape between the corresponding second guide wheel 13 and the second rotating wheel 7.

[0087] It is evident that, for Figure 2 The system includes a one-to-one correspondence between the first guide wheel 12 and the first rotating wheel 6, and a one-to-one correspondence between the second guide wheel 13 and the second rotating wheel 7. Each first rotating wheel 6 and each second rotating wheel 7 guides the direction of two rope segments, and the radial forces exerted by these two rope segments on the guide wheels are opposite and have a canceling effect, thereby improving the rotational smoothness of the first guide wheel 12 and the second guide wheel 13. The two rope segments located between the rotating wheel and the guide wheel are arranged in an X-shape, making the aforementioned canceling effect more obvious, thereby further improving the rotational smoothness of the guide wheels.

[0088] In this embodiment, each first rope segment 8 and each second rope segment 9 is a high-strength steel wire rope. If the lengths of each first rope segment 8 and each second rope segment 9 are fixed and not adjustable, problems may arise such as the rope segments being unable to be assembled onto the device, or the installed rope segments being too slack. To address this, this embodiment incorporates the following design: each first rope segment 8 and each second rope segment 9 is connected in series with an elastically extendable rope connector 14.

[0089] The resilient rope connector 14 can be purchased commercially or designed independently. For example, Chinese utility model patent publication number CN212839179U discloses a resilient rope connector 14. Furthermore, the applicant has proposed an alternative rope connector 14 in Chinese patent application number 2021222779475. Generally, resilient rope connectors 14 are equipped with springs.

[0090] In another embodiment, neither the first rope segment 8 nor the second rope segment 9 is equipped with an elastically retractable rope connector 14. Instead, multiple tensioning wheels are provided on the first bracket 1, with a corresponding tensioning wheel connected to each first rope segment 8 and each second rope segment 9, so that each first rope segment 8 and each second rope segment 9 is tensionedly connected between the corresponding two first rotating wheels 6 and the corresponding two rotating wheels 7 by means of the tensioning wheels.

[0091] In this embodiment, two adjacent first rope segments 8 or two adjacent second rope segments 9 are not directly connected (unlike in Embodiment 2 described later); each first rope segment 8 and each second rope segment 9 is an independent rope segment. The method for fixing the end of each rope segment to the corresponding wheel can be: opening a slot on the wheel and inserting a locking block located at the end of the rope segment into the slot. The applicant proposed a feasible solution in patent application number 2021222678968.

[0092] As mentioned above, the "wrapping" of the first rope segment 8 and the second rope segment 9 around the first reel 6 and the second reel 7 can be either a full circle or a partial circle. However, if each rope segment wraps around the corresponding first reel 6 and second reel 7 in a full circle (greater than 360°), the following drawback will exist:

[0093] Under the power of the drive device 4, the rope may pull the first rotating wheel 6 and the second rotating wheel 7 to rotate a full circle or even several times, thereby causing the photovoltaic panel 3 to rotate a full circle. To ensure that the photovoltaic panel 3 can rotate a full circle, the length of the photovoltaic panel 3 must be less than the length of the rotating shaft 2; otherwise (i.e., the length of the photovoltaic panel 3 is greater than the length of the rotating shaft 2), the photovoltaic panel 3 will inevitably be blocked and collided with by the first support 1, resulting in structural damage. However, reducing the length of the photovoltaic panel 3 not only reduces the power generation of the photovoltaic device but also increases the overall cost of the photovoltaic device.

[0094] For the reasons mentioned above, in order to limit the rotatable range of the photovoltaic panel 3 to an angle that will not collide with or block the first support 1, this embodiment is designed as follows: in any working state, the sum of the circumference angles of at least two partially adjacent first rope segments 8 on the corresponding first rotating wheel 6 is less than 360 degrees.

[0095] When one of the first rope segments 8 pulls the corresponding first rotating wheel 6 to rotate, the rope segment is unwound from the first rotating wheel 6, and its winding angle (or coiling angle) on the first rotating wheel 6 gradually decreases. After the first rope segment 8 is unwound to the point where its end is sturdy and the direction of the pulling force on the first rotating wheel 6 passes through the axis of rotation of the first rotating wheel 6, the pulling force of the first rope segment 8 on the first rotating wheel 6 will not generate a rotational torque. No matter how much pulling force is applied to the first rotating wheel 6 at this point, the first rotating wheel 6 will no longer continue to rotate due to this pulling force, and the unwinding angle of the first rotating wheel 6 is approximately its original winding angle. Similarly, the unwinding angle of the other first rope segment 8 adjacent to the aforementioned first rope segment 8 also has the same characteristics. Therefore, if the sum of the winding angles of two adjacent first rope segments 8 on a corresponding first rotating wheel 6 is less than 360 degrees, it can be guaranteed that the rotation angle of the corresponding first rotating wheel 6 is generally less than 360 degrees, and the rotation angle of the photovoltaic panel 3 is less than 360 degrees.

[0096] It can be understood that "at least two partially adjacent first rope segments 8" means that it is not necessary, but not excluded, that all two adjacent first rope segments 8 (or each pair of adjacent first rope segments 8) have the above-mentioned characteristics. Specifically, in this embodiment, the sum of the circumference angles of one end of all two adjacent first rope segments 8 on the corresponding first rotating wheel 6 is less than 360 degrees—approximately 200 degrees.

[0097] The "working state" in "under any working state" refers to the state of the photovoltaic device when it is in normal use, excluding the state during maintenance, and even more so the state when it is damaged.

[0098] Furthermore, in any working state, the sum of the circumference angles of at least two partially adjacent ends of the second rope segments 9 on the corresponding second wheel 7 is also less than 360 degrees.

[0099] Rotation of shaft 2 only allows for angle adjustment of photovoltaic panel 3 in one direction, and cannot simultaneously track the longitude and latitude of sunlight. Therefore, in another embodiment, the photovoltaic device is further equipped with a second support. First support 1 is connected to the top of the second support in a manner that allows it to rotate around a first axis, and the weight of first support 1 is supported by the second support. The first axis is perpendicular to shaft 2. This allows each photovoltaic panel 3 to rotate around two mutually perpendicular axes of rotation, thereby enabling real-time vertical tracking of sunlight by the photovoltaic panel 3. The rotation of first support 1 on the second support is driven by another motor.

[0100] <Example 2>

[0101] Figures 6 to 8 A partial structure of the photovoltaic device in Embodiment 2 of this application is shown. This photovoltaic device has a structure that is basically the same as that of the photovoltaic device in Embodiment 1. It can be understood with reference to the description of Embodiment 1. The main difference is:

[0102] In this embodiment, two adjacent first rope segments 8 are integrally connected, and the non-end positions of the two integrally connected first rope segments 8 are fixed on the corresponding first rotating wheel 6. Specifically, a slot 601 is formed on the first rotating wheel 6, and a locking block 15 is provided at the middle position of the two integrally connected first rope segments 8. The locking block 15 is embedded in the slot 601, thereby realizing the fixed connection between the two first rope segments 8 and the first rotating wheel 6. Preferably, a screw can also be provided to lock the locking block 15 on the first rotating wheel 6. Correspondingly, two adjacent second rope segments 9 are also integrally connected, and the non-end positions of the two integrally connected second rope segments 9 are fixed on the corresponding second rotating wheel 7 by means of a similar structure described above.

[0103] The above are merely exemplary embodiments of this application and are not intended to limit the scope of protection of this application, which is determined by the appended claims.

Claims

1. A photovoltaic device, comprising: First support; Multiple rotating shafts are arranged parallel to each other along a first direction, and each of the rotating shafts is connected to the first bracket in a manner that allows it to rotate about its own axis. Multiple photovoltaic panels are arranged along the first direction, and each photovoltaic panel is fixed to one of the multiple rotating shafts in a corresponding manner. as well as A driving device, which is connected to the plurality of rotating shafts via a transmission assembly, to drive each of the rotating shafts to rotate around its respective axis; The transmission assembly is characterized in that it comprises: Multiple first rotating wheels are coaxially fixed to multiple rotating shafts, and the multiple first rotating wheels are arranged in a first row at intervals along the first direction; Multiple second rotating wheels are coaxially fixed to multiple rotating shafts in a one-to-one correspondence, and the multiple second rotating wheels are arranged in a second row at intervals along the first direction, wherein the second row is parallel to the first row; Multiple first rope segments are connected to each of two adjacent first rotating wheels and between the two most end first rotating wheels, and one end of each of two adjacent first rope segments is wrapped around and fixed to the corresponding first rotating wheel in opposite directions. A plurality of second rope segments are provided, with one second rope segment connecting each pair of adjacent second spools and the other connecting the two most distant second spools. Furthermore, one end of each pair of adjacent second rope segments is wrapped around and fixed to the corresponding second spool in opposite directions. A reciprocating traction seat, which can reciprocate along the first direction under the drive of the driving device, wherein a first rope segment is fixedly connected to the reciprocating traction seat and a second rope segment is fixedly connected to the reciprocating traction seat.

2. The photovoltaic device according to claim 1, characterized in that, The transmission assembly also includes: The lead screw seat fixed to the first bracket, and A lead screw rotatably connected to the lead screw seat and extending along the first direction; The driving device is a motor fixed on the lead screw seat to drive the lead screw to rotate. The reciprocating traction seat is connected to the lead screw seat in a manner that enables it to move along the first direction, and the reciprocating traction seat is threadedly connected to the lead screw.

3. The photovoltaic device according to claim 2, characterized in that, The lead screw seat includes two parallel guide rods that extend along the first direction, and the reciprocating traction seat is movably connected to the two guide rods.

4. The photovoltaic device according to claim 2, characterized in that, The transmission assembly further includes a plurality of first guide wheels and a plurality of second guide wheels rotatably connected to the first bracket; For one of the plurality of first rope segments, one end of the first rope segment passes around the first first guide wheel and then around and is fixed to the first first rotating wheel, and the other end of the first rope segment passes around the second first guide wheel and then around and is fixed to the second first rotating wheel. The first rope segment extends along the first direction between the first first guide wheel and the second first guide wheel and is fixedly connected to the reciprocating traction seat. For one of the plurality of second rope segments, one end of the second rope segment passes around the first second guide wheel and then around and is fixed to the first second rotating wheel. The other end of the second rope segment passes around the second second guide wheel and then around and is fixed to the second second rotating wheel. The second rope segment extends along the first direction between the first second guide wheel and the second second guide wheel and is fixedly connected to the reciprocating traction seat.

5. The photovoltaic device according to claim 1, characterized in that, The first rope segment fixedly connected to the reciprocating traction seat includes a first sub-rope segment and a second sub-rope segment. One end of the first sub-rope segment is fixed to the reciprocating traction seat, and the other end is wrapped around and fixed to a corresponding first wheel. One end of the second sub-rope segment is fixed to the reciprocating traction seat, and the other end is wrapped around and fixed to another corresponding first wheel. The second rope segment, which is fixedly connected to the reciprocating traction seat, includes a third sub-rope segment and a fourth sub-rope segment. One end of the third sub-rope segment is fixed to the reciprocating traction seat, and the other end is wrapped around and fixed to a corresponding second wheel. One end of the fourth sub-rope segment is fixed to the reciprocating traction seat, and the other end is wrapped around and fixed to another corresponding second wheel.

6. The photovoltaic device according to claim 1, characterized in that, The transmission assembly further includes a plurality of first guide wheels and a plurality of second guide wheels rotatably connected to the first bracket. Each first rope segment has its two ends passing over two corresponding first guide wheels and then wrapping around and fixing to two corresponding first rotating wheels. Each second rope segment has its two ends passing over two corresponding second guide wheels and then wrapping around and fixing to two corresponding second rotating wheels. Each first rope segment extends along the first direction between two corresponding first guide wheels, and each second rope segment extends along the first direction between two corresponding second guide wheels.

7. The photovoltaic device according to claim 1, characterized in that, The transmission assembly further includes at least one first guide wheel and at least one second guide wheel rotatably connected to the first bracket, each first guide wheel corresponding to one first rotating wheel, and each second guide wheel corresponding to one second rotating wheel; At least two adjacent first rope segments have one end wrapped around the corresponding first guide wheel in opposite directions, and then around and fixed to the corresponding first rotating wheel in opposite directions, and the two are arranged in an X-shape between the corresponding first guide wheel and the first rotating wheel; At least two adjacent second rope segments have one end that passes around the corresponding second guide wheel in opposite directions and then around and is fixed to the corresponding second rotating wheel in opposite directions, and the two are arranged in an X-shape between the corresponding second guide wheel and the second rotating wheel.

8. The photovoltaic device according to claim 1, characterized in that, At least two adjacent first rope segments are integrally connected, and the non-end positions of the two integrally connected first rope segments are fixed on the corresponding first reel; At least two adjacent second rope segments are integrally connected, and the non-end positions of the two integrally connected second rope segments are fixed on the corresponding second reel.

9. The photovoltaic device according to claim 1, characterized in that, Each of the first rope segment and each of the second rope segment are steel wire ropes; Each of the first rope segment and each of the second rope segments is connected in series with a resilient rope connector, or each of the first rope segment and each of the second rope segments is connected with a tensioning pulley.

10. The photovoltaic device according to claim 1, characterized in that, In any working state, the sum of the circumference angles of one end of at least two partially adjacent first rope segments on the corresponding first wheel is less than 360 degrees, and the sum of the circumference angles of one end of at least two partially adjacent second rope segments on the corresponding second wheel is less than 360 degrees.

Images