CN216390885U - Photovoltaic system - Google Patents

Abstract

The application relates to a photovoltaic system, which comprises a first support, a plurality of rotating shafts, a plurality of photovoltaic panels and a driving device, wherein the driving device is connected with the rotating shafts through a transmission assembly so as to drive the rotating shafts to rotate around respective axes respectively; the transmission assembly comprises a reciprocating pull rod, a first rotating wheel, a second rotating wheel, a plurality of third rotating wheels, a plurality of fourth rotating wheels, a first rope, a second rope, a plurality of third ropes and a plurality of fourth ropes, wherein the first rotating wheel and the second rotating wheel are rotatably connected to the reciprocating pull rod. The transmission assembly used for transmitting the driving force to the photovoltaic panel in the photovoltaic system is low in cost and high in reliability, can transmit the rotating torque to the rotating shaft driving the photovoltaic panel relatively and uniformly, effectively prevents the rotating shaft and the photovoltaic panel from generating distortion, and has a limiting function on the rotating angle of the photovoltaic panel.

Description

Photovoltaic system

Technical Field

The application relates to the photovoltaic field, in particular to a photovoltaic system.

Background

Solar energy is increasingly applied as a clean renewable energy source, and particularly, a tracking photovoltaic power generation technology is a new solar energy utilization technology following a conventional photovoltaic power generation technology.

The solar tracking system can keep the photovoltaic panel to face the sun as far as possible, so that the generating capacity of the solar photovoltaic module is improved, the investment cost of the photovoltaic power generation system is effectively reduced, and the utilization rate of the solar photovoltaic module is improved.

Photovoltaic tracking systems that employ a plurality of photovoltaic panels to share a support are a trend in future solar tracking photovoltaic systems. The tracking photovoltaic support commonly used at present is mainly a single-motor connecting rod multi-point linkage structure, but the structure has a plurality of defects:

for example, the cost of parts is high, the installation is inconvenient, and the manual assembly cost is high; for another example, the connecting rod configured in the transmission mechanism is very long, so that the risk of twist deformation is easy to occur, and the service life of the tracking system is reduced; for another example, the transmission mechanism cannot transmit the driving force provided by the driving device to the photovoltaic panel more uniformly, so that the photovoltaic panel is easily distorted and deformed and even has structural damage; for example, the transmission mechanism itself does not have a function of limiting the transmission angle, and once the operation angle of the motor is not well controlled, the photovoltaic panel may be damaged by colliding with the bracket.

Disclosure of Invention

This application is in order to solve at least one of above-mentioned problem, provides a photovoltaic system, this low price, the reliability of the drive assembly who is arranged in this photovoltaic system for driving power to the transmission of photovoltaic board are high, can be comparatively balanced to the pivot transmission moment of torsion that drives the photovoltaic board, effectively prevent that pivot and photovoltaic board from producing distortion.

The technical scheme of the application is as follows:

a photovoltaic system, comprising:

a first bracket;

a plurality of rotating shafts which are arranged in parallel with each other in a first direction and each of which is connected to the first bracket so as to be rotatable about its own axis;

a plurality of photovoltaic panels arranged in the first direction and fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively; and

the driving device is connected with the rotating shafts through a transmission assembly so as to drive the rotating shafts to rotate around respective axes;

the transmission assembly includes:

the reciprocating pull rod can reciprocate along the first direction under the driving of the driving device;

a first wheel and a second wheel rotatably connected to the reciprocating pull rod;

a plurality of third rotating wheels coaxially fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively, and arranged in a first row at intervals along the first direction;

a plurality of fourth rotating wheels coaxially fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively, and arranged in a second row spaced apart from each other along the first direction, wherein the second row is parallel to the first row;

the first rope is connected with the first rotating wheel in a winding mode and comprises a first rope section and a second rope section which are led out from two sides of the first rotating wheel respectively and then extend out in the forward direction of the first direction;

the second rope is connected with the second rotating wheel in a winding mode and comprises a third rope section and a fourth rope section which are led out from two sides of the second rotating wheel respectively and then extend out along the negative direction of the first direction, the first rope section and the third rope section correspond to the first row, and the second rope section and the fourth rope section correspond to the second row;

a plurality of third ropes, each of the third pulleys corresponding to two of the third ropes, respectively, and one ends of the two third ropes corresponding to each of the third pulleys surrounding and fixed to the third pulley in opposite directions, respectively, and the other ends of the two third ropes corresponding to each of the third pulleys fixed to the first rope segment and the third rope segment, respectively; and

a plurality of fourth ropes, each of the fourth pulleys corresponds to two of the fourth ropes, and one end of the two fourth ropes corresponding to each of the fourth pulleys surrounds and is fixed to the fourth pulley in opposite directions, respectively, and the other end of the two fourth ropes corresponding to each of the fourth pulleys is fixed to the second rope segment and the fourth rope segment, respectively.

In an optional design, the transmission assembly includes a first guide wheel, a second guide wheel, a third guide wheel and a fourth guide wheel which are rotatably connected to the first bracket and are distributed in a rectangular shape, wherein the first guide wheel and the second guide wheel are respectively arranged at two opposite sides of the plurality of third rotating wheels along the first direction, the third guide wheel and the fourth guide wheel are respectively arranged at two opposite sides of the plurality of fourth rotating wheels along the first direction, and the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are sequentially arranged along the circumferential direction;

one end of the first rope is wound out of the first rotating wheel and then directly extends in the positive direction of the first direction by passing the first guide wheel, so that the first rope section is formed; the other end of the first rope is wound out of the first rotating wheel and then directly extends in the positive direction of the first direction by passing the fourth guide wheel, so that a second rope section is formed; one end of the second rope is wound out of the second rotating wheel and then directly extends along the negative direction of the first direction by passing the second guide wheel, so that a third rope section is formed; the other end of the second rope is wound out of the second rotating wheel and then directly extends along the negative direction of the first direction by passing the third guide wheel, so that a fourth rope section is formed.

In an alternative design, the transmission assembly includes:

a fifth guide wheel and a sixth guide wheel rotatably connected to the first bracket and located between the first guide wheel and the fourth guide wheel, an

Seventh and eighth guide wheels rotatably connected to the first carriage and located between the second and third guide wheels;

one end of the first rope sequentially bypasses the fifth guide wheel and the first guide wheel after being wound out of the first rotating wheel, the other end of the first rope segment sequentially bypasses the sixth guide wheel and the fourth guide wheel after being wound out of the first rotating wheel, the first rope between the first rotating wheel and the fifth guide wheel extends along the first direction, and the first rope between the first rotating wheel and the sixth guide wheel extends along the first direction;

one end of the second rope sequentially bypasses the seventh guide wheel and the second guide wheel after being wound out from the second rotating wheel, the other end of the second rope section sequentially bypasses the eighth guide wheel and the third guide wheel after being wound out from the second rotating wheel, the second rope between the second rotating wheel and the seventh guide wheel is arranged in an extending mode along the first direction, and the first rope between the second rotating wheel and the eighth guide wheel is arranged in an extending mode along the first direction.

In an alternative design, the reciprocating pull rod is a screw rod extending along the first direction, the transmission assembly further includes a screw rod seat fixed to the first bracket, and a screw rod nut rotatably connected to the screw rod seat and threadedly connected to the screw rod, and the driving device is a motor fixed to the screw rod seat and driving the screw rod nut to rotate.

In an alternative design, the lead screw includes a first rod segment, a first elastic element, a second rod segment, a third rod segment, a fourth rod segment, a fifth rod segment, a sixth rod segment, a second elastic element, and a seventh rod segment connected in sequence along the first direction, wherein two ends of the third rod segment are respectively in threaded connection with the second rod segment and the fourth rod segment, and thereby the distance between the second rod segment and the fourth rod segment is adjusted by rotating the third rod segment, two ends of the fifth rod segment are respectively in threaded connection with the fourth rod segment and the sixth rod segment, and thereby the distance between the fourth rod segment and the sixth rod segment is adjusted by rotating the fifth rod segment, and the lead screw nut is in threaded connection with the fourth rod segment.

In an alternative design, the two third ropes corresponding to at least one of the third pulleys are integrally connected, and the non-end positions of the integrally connected two first ropes are fixed on the first pulleys corresponding to the two first ropes; the two fourth ropes corresponding to at least one of the fourth pulleys are integrally connected, and the non-end positions of the two integrally connected fourth ropes are fixed to the second pulleys corresponding to the two fourth ropes.

In an alternative design, the transmission assembly further includes a plurality of ninth guide wheels and a plurality of tenth guide wheels, the plurality of ninth guide wheels are arranged in a third row along the first direction, and the plurality of ninth guide wheels respectively correspond to the plurality of third rotating wheels one by one, the plurality of tenth guide wheels are arranged in a fourth row along the first direction, and the plurality of tenth guide wheels respectively correspond to the plurality of fourth rotating wheels one by one;

the third row is parallel to the first row and both define a third plane, the fourth row is parallel to the second row and both define a fourth parallel, the third plane and the fourth plane are both perpendicular to the axis of rotation;

one end of each of the two third ropes corresponding to each third turning wheel respectively bypasses the corresponding ninth guide wheel in the opposite direction and then surrounds and is fixed to the third turning wheel in the opposite direction, and one end of each of the two fourth ropes corresponding to each fourth turning wheel respectively bypasses the corresponding tenth guide wheel in the opposite direction and then surrounds and is fixed to the fourth turning wheel in the opposite direction;

the two third ropes corresponding to each third rotating wheel are arranged between the third rotating wheel and the corresponding ninth guide wheel in an X-shaped crossed mode, and the two fourth ropes corresponding to each fourth rotating wheel are arranged between the fourth rotating wheel and the corresponding tenth guide wheel in an X-shaped crossed mode.

In an alternative design, the sum of the angles of the two third ropes on the third wheel for each third wheel is less than 360 degrees, and the sum of the angles of the two fourth ropes on the fourth wheel for each fourth wheel is less than 360 degrees.

In an alternative design, comprising:

a first bracket;

a plurality of rotating shafts which are arranged in parallel with each other in a first direction and each of which is connected to the first bracket so as to be rotatable about its own axis;

a plurality of photovoltaic panels arranged in the first direction and fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively; and

the driving device is connected with the rotating shafts through a transmission assembly so as to drive the rotating shafts to rotate around respective axes;

the transmission assembly includes:

the reciprocating pull rod can reciprocate along the first direction under the driving of the driving device;

a first wheel and a second wheel rotatably connected to the reciprocating pull rod;

a plurality of third rotating wheels coaxially fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively, and arranged in a first row at intervals along the first direction;

a plurality of fourth rotating wheels coaxially fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively, and arranged in a second row spaced apart from each other along the first direction, wherein the second row is parallel to the first row;

the first rope is connected with the first rotating wheel in a winding mode, and two ends of the first rope are led out from two sides of the first rotating wheel respectively and then are connected with a first pull rod and a second pull rod which extend along the first direction respectively;

the second rope is connected with the second rotating wheel in a winding manner, two ends of the second rope are respectively led out from two sides of the second rotating wheel and then are respectively connected with a third pull rod and a fourth pull rod which extend along the first direction, the first pull rod and the third pull rod correspond to the first row, and the second pull rod and the fourth pull rod correspond to the second row;

a plurality of third ropes, each of the third pulleys corresponding to two of the third ropes, respectively, and one ends of the two third ropes corresponding to each of the third pulleys surrounding and fixed to the third pulley in opposite directions, respectively, and the other ends of the two third ropes corresponding to each of the third pulleys being fixed to the first link and the third link, respectively; and

and a plurality of fourth ropes, each of the fourth pulleys corresponds to two of the fourth ropes, and one end of the two fourth ropes corresponding to each of the fourth pulleys surrounds and is fixed to the fourth pulley in opposite directions, respectively, and the other end of the two fourth ropes corresponding to each of the fourth pulleys is fixed to the second pull rod and the fourth pull rod, respectively.

In an alternative design, the reciprocating pull rod is a screw rod extending along the first direction, the transmission assembly further includes a screw rod seat fixed to the first bracket, and a screw rod nut rotatably connected to the screw rod seat and threadedly connected to the screw rod, and the driving device is a motor fixed to the screw rod seat and driving the screw rod nut to rotate.

In an alternative design, the transmission assembly further includes a plurality of ninth guide wheels and a plurality of tenth guide wheels, the plurality of ninth guide wheels are arranged in a third row along the first direction, and the plurality of ninth guide wheels respectively correspond to the plurality of third rotating wheels one by one, the plurality of tenth guide wheels are arranged in a fourth row along the first direction, and the plurality of tenth guide wheels respectively correspond to the plurality of fourth rotating wheels one by one;

the third row is parallel to the first row and both define a third plane, the fourth row is parallel to the second row and both define a fourth parallel, the third plane and the fourth plane are both perpendicular to the axis of rotation;

one end of each of the two third ropes corresponding to each third turning wheel respectively bypasses the corresponding ninth guide wheel in the opposite direction and then surrounds and is fixed to the third turning wheel in the opposite direction, and one end of each of the two fourth ropes corresponding to each fourth turning wheel respectively bypasses the corresponding tenth guide wheel in the opposite direction and then surrounds and is fixed to the fourth turning wheel in the opposite direction;

the two third ropes corresponding to each third rotating wheel are arranged between the third rotating wheel and the corresponding ninth guide wheel in an X-shaped crossed mode, and the two fourth ropes corresponding to each fourth rotating wheel are arranged between the fourth rotating wheel and the corresponding tenth guide wheel in an X-shaped crossed mode.

The application has at least the following beneficial effects:

1. the transmission assembly for transmitting the driving force to the photovoltaic panel in the photovoltaic system is mainly provided with a rope with low cost, and the rope mainly bears the tensile stress when in use, so that the reliability is high, the damage is not easy, and the service life is long.

2. The transmission assembly of the photovoltaic system can uniformly transmit the power of the driving device to the rotating wheels at the two ends of the rotating shaft, so that the torsional force received at the two ends of the corresponding rotating shaft is balanced and consistent, and the rotating shaft and the photovoltaic panel on the rotating shaft are prevented from generating obvious torsional deformation.

3. Each rope and runner in this photovoltaic system transmission movable assembly adopt specific structure to mutually support, utilize the mechanical structure of transmission assembly self alright restriction photovoltaic board's turned angle to avoid photovoltaic board and support to produce the collision, guarantee the life of photovoltaic board, also help the increase design of the photovoltaic board size especially length size.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description only relate to some embodiments of the present application and are not limiting on the present application.

Fig. 1 is a schematic view of an overall structure of a photovoltaic system according to an embodiment of the present application.

Fig. 2 is a schematic structural view of the photovoltaic panel of fig. 1 after being removed.

Fig. 3 is a schematic structural view of fig. 2 with parts removed.

Fig. 4 is an enlarged view of the X1 portion of fig. 3.

Fig. 5 is an enlarged view of the portion X2 of fig. 3.

Fig. 6 is an enlarged view of the X3 portion of fig. 3.

Fig. 7 is an enlarged view of the portion X4 of fig. 3.

Fig. 8 is a schematic view of another photovoltaic system as mentioned in the first embodiment of the present application.

Fig. 9 is a schematic view of the overall structure of a photovoltaic system according to a second embodiment of the present application.

Fig. 10 is a schematic structural view of fig. 9 with parts removed.

Fig. 11 is a schematic structural view of a reciprocating pull rod in the second embodiment of the present application.

Fig. 12 is a schematic structural diagram of a third rotating wheel in the second embodiment of the present application.

Fig. 13 is a schematic view of the structure of a third rope in the second embodiment of the present application.

Fig. 14 is a schematic view of the third pulley, the third rope and the connector according to the second embodiment of the present application.

Fig. 15 is a schematic cross-sectional view of a first connector in a second embodiment of the present application.

Description of reference numerals:

f1 — first direction;

1-a first support, 2-a rotation shaft, 3-a photovoltaic panel, 4-a drive, 5-a reciprocating lever, 6-a first wheel, 7-a second wheel, 8-a third wheel, 9-a fourth wheel, 10-a first rope, 11-a second rope, 12-a third rope, 13-a fourth rope, 14-a screw seat, 15-a first guide wheel, 16-a second guide wheel, 17-a third guide wheel, 18-a fourth guide wheel, 19-a fifth guide wheel, 20-a sixth guide wheel, 21-a seventh guide wheel, 22-an eighth guide wheel, 23-a ninth guide wheel, 24-a tenth guide wheel, 25-a block, 26-a first connector, 27-a second connector, 28-a third connector, 29-a fourth connector;

501-a first pole segment, 502-a second pole segment, 503-a third pole segment, 504-a fourth pole segment, 505-a fifth pole segment, 506-a sixth pole segment, 507-a seventh pole segment, 508-a first elastic element, 509-a second elastic element;

801-card slot;

1001-first rope segment, 1002-second rope segment;

1101-a third rope portion, 1102-a fourth rope portion;

1201-a first chuck, 1202-a second chuck;

2601-a first body, 2602-a second body, 2603-a first nut, 2601 a-a first through hole, 2601 b-a third through hole, 2601 c-a first cavity, 2602 a-a first screw, 2602 b-a first slot, 2602 c-a first guide hole;

2701-third body, 2702-fourth body, 2703-second nut, 2701 a-third through hole, 2701 b-fourth through hole, 2701 c-second chamber, 2702 a-second screw, 2702 b-second card slot, 2702 c-second guiding hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application. It will be understood that some of the technical means of the various embodiments described herein may be replaced or combined with each other without conflict.

In the description of the present application and claims, the terms "first," "second," and the like, if any, are used solely to distinguish one from another as between described objects and not necessarily in any sequential or technical sense. Thus, an object defined as "first," "second," etc. may explicitly or implicitly include one or more of the object. Also, the use of the terms "a" or "an" and the like, do not denote a limitation of quantity, but rather denote the presence of at least one of the two, and "a plurality" denotes no less than two.

In the description of the present application and the claims, the terms "connected," "mounted," "fixed," "housed," and the like are used broadly unless otherwise indicated. For example, "connected" may be a separate connection or may be integrally connected; can be directly connected or indirectly connected through an intermediate medium; may be non-detachably connected or may be detachably connected. For example, "accommodated" does not necessarily mean that the entire body is completely accommodated, and the concept also includes a partial accommodation case in which a part protrudes outward. The specific meaning of the foregoing terms in the present application can be understood by those skilled in the art as appropriate.

In the description of the present application and in the claims, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", etc. based on the orientation or positional relationship shown in the drawings, it is only for the convenience of clearly and simply describing the present application, and it is not indicated or implied that the elements referred to must have a specific direction, be constructed and operated in a specific orientation, and these directional terms are relative concepts for the sake of description and clarification and may be changed accordingly according to the change of orientation in which the elements in the drawings are placed. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements.

In the description of the present application and in the claims, the presence of the terms "in sequence" and "sequentially", for example the phrase "A, B, C arranged in sequence", merely indicates the order of arrangement of the elements A, B, C and does not exclude the possibility of arranging other elements between a and B and/or between B and C.

In the description of the specification and claims of this application, the term "configured to" if present is generally interchangeable with "… capable", "designed to", "for", or "capable", depending on the context.

In the description of the present specification and claims, if there is "direction" with respect to motion, including motion having a directional component, the term "in direction" is not necessarily to be construed as motion in only that one direction, and those skilled in the art will understand the specific meaning of the aforementioned terms in the present application as the case may be.

Embodiments of the present application will now be described with reference to the accompanying drawings.

< example one >

Fig. 1 to 7 show a specific embodiment of a photovoltaic system of the present application, which comprises a first support 1, a plurality of shafts 2, a plurality of photovoltaic panels 3, and a driving device 4. Wherein:

the plurality of rotating shafts 2 are arranged in parallel to each other in the first direction F1, and each rotating shaft 2 is connected to the first bracket 1 in such a manner as to be rotatable about its own axis. The weight of the rotating shaft 2 is supported by the first support 1. One specific implementation is as follows: a plurality of bearing blocks are arranged on the first support 1, and two ends of each rotating shaft 2 are respectively connected to the corresponding two bearing blocks.

The plurality of photovoltaic panels 3 are also arranged in the first direction F1, and the plurality of photovoltaic panels 3 are fixed to the plurality of shafts 2 in a one-to-one correspondence, respectively. When the rotating shaft 2 rotates, the photovoltaic panel 3 fixed with the rotating shaft 2 rotates along with the rotating shaft, so that the incident angle of the photovoltaic panel 3 is adjusted. The weight of the photovoltaic panel 3 is also borne by the first support 1. The driving device 4 is connected with the plurality of rotating shafts 2 through a transmission assembly so as to drive the rotating shafts 2 to rotate around respective axes.

The transmission assembly comprises a reciprocating pull rod 5, a first wheel 6, a second wheel 7, a plurality of third wheels 8, a plurality of fourth wheels 9, a first rope 10, a second rope 11, a plurality of third ropes 12 and a plurality of fourth ropes 13. Wherein:

the drag link 5 is reciprocatingly movable in the first direction F1 by the driving unit 4, and the first pulley 6 and the second pulley 7 are rotatably connected to the drag link 5. When the driving device 4 drives the reciprocating pull rod 5 to move, the first rotating wheel 6 and the second rotating wheel 7 connected to the reciprocating pull rod 5 move along with the reciprocating pull rod, and accordingly, the related rope is pulled. Specifically, the drag link 5 has first and second ends oppositely disposed in the first direction F1, i.e., left and right ends of the drag link 5 in fig. 3, the first pulley 6 is rotatably connected to the first end of the drag link 5, and the second pulley 7 is rotatably connected to the second end of the drag link 5.

The plurality of third rotating wheels 8 are coaxially fixed to the plurality of rotating shafts 2 in a one-to-one correspondence, respectively, and the plurality of third rotating wheels 8 are arranged in a line at intervals from each other in the first direction F1. For ease of description, the row in which the plurality of third wheels 8 are located will be referred to herein as the first row.

The plurality of fourth runners 9 are also coaxially fixed to the plurality of rotary shafts 2 in a one-to-one correspondence, respectively, and the plurality of fourth runners 9 are also arranged in a line at intervals from each other in the first direction F1. For convenience of description, the row in which the plurality of fourth wheels 9 are located is referred to herein as the second row. The second row is parallel to the first row.

The first rope 10 is trained around the first wheel 6, and the first rope 10 comprises a first rope portion 1001 and a second rope portion 1002, which extend from both sides of the first wheel 6 and extend in the forward direction of the first direction F1. It should be noted that "the first rope portion 1001 and the second rope portion 1002 extending from both sides of the first pulley 6 and both extending in the forward direction of the first direction F1" means that the first rope portion 1001 and the second rope portion 1002 belong to downstream rope portions on both sides of the first pulley 6, respectively, there may be another transitional rope portion between the first pulley 6 and the second pulley 1001, and it does not mean that the starting ends of the first rope portion 1001 and the second rope portion 1002 are at the first pulley 6, and it can be understood with reference to fig. 3 to 7 in particular.

The second rope 11 is reeved with the second wheel 7, and the second rope 11 comprises a third rope portion 1101 and a fourth rope portion 1102 which are led out from both sides of the second wheel 7 and extend in the negative direction of the first direction F1. The first and third rope portions 1001, 1101 correspond to the first row, and the second and fourth rope portions 1002, 1102 correspond to the second row.

It is understood that the positive and negative directions of the first direction F1 refer to two opposite directions in the first direction F1. Specifically, in fig. 2, the positive direction of the first direction F1 is the rightward direction parallel to the paper, and the negative direction of the first direction F1 is the leftward direction parallel to the paper.

Referring to fig. 2 to 7, the number of the third ropes 12 is twice that of the third pulleys 8, each third pulley 8 corresponds to two third ropes 12, one end of each third rope 12 corresponding to each third pulley 8 surrounds and is fixed to the third pulley 8 in opposite directions, and the other end of each third rope 12 corresponding to each third pulley 8 is fixed to the first rope segment 1001 and the third rope segment 1101.

The above-mentioned "surround and fix to in opposite directions respectively" has the meaning: referring to fig. 3 to 5, for each of the two third ropes 12 corresponding to each of the third pulleys 8, one end of one third rope 12 is wound around and fixed to the corresponding third pulley 8 in a clockwise direction, and one end of the other third rope 12 is wound around and fixed to the third pulley 8 in a counterclockwise direction.

It is understood that "surrounding" includes surrounding around the entire circumference, as well as surrounding around less than the entire circumference (e.g., half-circumference or 1/8-circumference).

Because one end of each of the two third ropes 12 is wound around and fixed to the corresponding third pulley 8 in opposite directions, when the first third rope 12 pulls the third pulley 8 to rotate so that the first third rope 12 is unwound from the third pulley 8, the third pulley 8 necessarily winds up the second third rope 12.

The number of fourth ropes 13 is twice as large as the number of fourth wheels 9, each fourth wheel 9 corresponds to two fourth ropes 13, and one end of each of the two fourth ropes 13 corresponding to each fourth wheel 9 is wound around and fixed to the fourth wheel 9 in opposite directions, respectively, and the other end of each of the two fourth ropes 13 corresponding to each fourth wheel 9 is fixed to the second rope segment 1002 and the fourth rope segment 1102, respectively.

Referring to fig. 2 in combination with fig. 1 and fig. 3 to 7, if it is intended to rotate each photovoltaic panel 3 in fig. 1 to a horizontal angle in a clockwise direction around the axis of the rotating shaft 2, the driving device 4 can be controlled to drive the reciprocating pull rod 5 to move leftwards in fig. 2, the second rotating wheel 7 connected to the second end of the reciprocating pull rod 5 is rotated to pull the second rope 11 leftwards, and the third rope segment 1101 and the fourth rope segment 1102 of the second rope 11 respectively move rightwards. The third and fourth rope portions 1101 and 1102 moving to the right respectively pull the respective third and fourth pulleys 8 and 9 to rotate clockwise in fig. 2, thereby driving the respective photovoltaic panel 3 to rotate clockwise to a horizontal angle in fig. 1. In this process, the "paid-out amount" of the first rope 10 is substantially equal to the "recovered amount" of the second rope 11. In the process, the rotatable second runner 7 has the function of balancing the tension of the second rope 11 on the third runner 8 and the fourth runner 9, so that the tension of the third runner 8 from the third rope segment 1101 and the tension of the fourth runner 9 from the fourth rope segment 1102 are kept equal, the torsion forces of the rotating shaft 2 from the third runner 8 and the fourth runner 9 are kept consistent, and the obvious torsion deformation of the rotating shaft 2 and the photovoltaic panel 3 on the rotating shaft 2 is prevented.

Similarly, if it is intended to turn each photovoltaic panel 3 in fig. 1 to a more inclined angle in the counterclockwise direction around the axis of the rotating shaft 2, the driving device 4 can be controlled to drive the reciprocating pull rod 5 to move to the right in fig. 2, and each rotating shaft 2 is pulled to rotate counterclockwise by the first rope 10. In this process, the "paid-out amount" of the second rope 11 is substantially equal to the "recovered amount" of the first rope 10.

This embodiment is coaxial fixed third runner 8 and the fourth runner 9 that separates each other on every pivot 2, and the during operation, third runner 8 and fourth runner 9 all exert the rotation moment of torsion to pivot 2 under the pulling of relevant rope, have improved the rotation smoothness of pivot 2, have reduced the torsional deformation degree of pivot 2, and then prevent to fix photovoltaic board 3 production deformation on pivot 2. Preferably, the third wheel 8 and the fourth wheel 9 are connected to opposite ends of the shaft 2, respectively.

Referring to fig. 3 in conjunction with fig. 2 and 4 to 7, in the present embodiment, in order to better guide the running direction of the first rope 10 and the second rope 11 to obtain the first rope portion 1001, the second rope portion 1002, the third rope portion 1101 and the fourth rope portion 1102, the transmission assembly further includes a first guide wheel 15, a second guide wheel 16, a third guide wheel 17 and a fourth guide wheel 18 rotatably connected to the first bracket 1. The first guide wheel 15, the second guide wheel 16, the third guide wheel 17 and the fourth guide wheel 18 are distributed in a rectangular shape, and the first guide wheel 15 and the second guide wheel 16 are respectively arranged at two opposite sides of the plurality of third runners 8 along the first direction F1, and the third guide wheel 17 and the fourth guide wheel 18 are respectively arranged at two opposite sides of the plurality of fourth runners 9 along the first direction F1. The first guide wheel 15, the second guide wheel 16, the third guide wheel 17, and the fourth guide wheel 18 are arranged in order in the circumferential direction (rectangular circumference).

One end of the first rope 10 is passed out from the first sheave 6 and passed around the first guide sheave 15 to extend directly in the forward direction of the first direction F1, thereby forming a first rope portion 1001. The other end of the first rope 10 has been reeled out from the first reel 6 and further directly in the positive direction of the first direction F1 around the fourth guide pulley 18, thus forming a second rope portion 1002. One end of the second rope 11 is passed around the second turning wheel 7 and then passed around the second guide pulley 16 to extend directly in the negative direction of the first direction F1, thereby forming a third rope portion 1101. The other end of the second rope 11 has been passed around the second turning wheel 7 and passed around the third guide wheel 17 to run directly in the negative direction of the first direction F1, thus forming a fourth rope portion 1102.

Further, referring to fig. 3 in combination with fig. 2, 4 to 7, the transmission assembly further includes a fifth guide wheel 19, a sixth guide wheel 20, a seventh guide wheel 21 and an eighth guide wheel 22 rotatably connected to the first bracket 1. The fifth guide wheel 19 and the sixth guide wheel 20 are located between the first guide wheel 15 and the fourth guide wheel 18. The seventh guide wheel 21 and the eighth guide wheel 22 are located between the second guide wheel 16 and the third guide wheel 17. The first guide wheel 15, the second guide wheel 16, the third guide wheel 17, the fourth guide wheel 18, the fifth guide wheel 19, the sixth guide wheel 20, the seventh guide wheel 21, and the eighth guide wheel 22 are symmetrical with respect to a first plane, which is a plane parallel to the first direction F1 and perpendicular to the rotation shaft 2. One end of the first rope 10 is passed around the fifth sheave 19 and the first sheave 15 in order after being passed out from the first sheave 6, and the other end of the first rope portion 1001 is passed around the sixth sheave 20 and the fourth sheave 18 in order after being passed out from the first sheave 6. One end of the second rope 11 is wound around the seventh guide pulley 21 and the second guide pulley 16 in this order after being wound off the second reel 7, and the other end of the second rope 11 is wound around the eighth guide pulley 22 and the third guide pulley 17 in this order after being wound off the second reel 7.

The positions of the guide wheels and the directions of the corresponding ropes are configured in the mode, so that the synchronism of the retraction of the first rope 10 and the retraction of the second rope 11 is improved, and the excessive tension of the ropes is prevented.

Referring to fig. 8, in another embodiment, a more optimized way is adopted to further improve the synchronization of the retraction and the release of the first rope 10 and the second rope 11: the fifth guide wheel 19 and the sixth guide wheel 20 are arranged at a small distance along the extension direction of the rotation shaft 2, correspondingly, the seventh guide wheel 21 and the eighth guide wheel 22 are arranged at a small distance along the extension direction of the rotation shaft 2, and thus the first rope 10 between the first pulley 6 and the fifth guide wheel 19 is arranged to extend along the first direction F1, the first rope 10 between the first pulley 6 and the sixth guide wheel 20 is arranged to extend along the first direction F1, the second rope 11 between the second pulley 7 and the seventh guide wheel 21 is arranged to extend along the first direction F1, and the first rope 10 between the second pulley 7 and the eighth guide wheel is arranged to extend along the first direction F1.

In this embodiment, the reciprocating pull rod 5 is a screw rod extending along the first direction F1, the driving device 4 is a motor, the screw rod is driven by the operation of the motor to reciprocate along the first direction F1, and the photovoltaic panels 3 are pulled by the rope to rotate so as to adjust the light-receiving angle. Specifically, a screw base 14 is fixed to the first bracket 1, a screw nut, not shown in fig. 3 because it is hidden, is rotatably coupled to the screw base 14, and the screw nut is screw-coupled to the screw, and a motor as the driving device 4 is fixed to the screw base 14 and is coupled to the aforementioned screw nut to drive the screw nut to rotate, and the screw is moved in the first direction F1 by the rotating screw nut. The spindle base 14 and the spindle nut are components of a transmission assembly.

Referring to fig. 3 to 7 again, in the present embodiment, the transmission assembly further includes a plurality of ninth guide wheels 23 and a plurality of tenth guide wheels 24. The plurality of ninth guide wheels 23 are arranged in a third row in the first direction F1, and the plurality of ninth guide wheels 23 respectively correspond one-to-one to the plurality of third runners 8. The tenth guide wheels 24 are arranged in a fourth row along the first direction F1, and the tenth guide wheels 24 are in one-to-one correspondence with the fourth turning wheels 9, respectively. The third row is parallel to the first row and both define a third plane. The fourth row is parallel to the second row and both define a fourth plane. The third plane and the fourth plane are both perpendicular to the rotation axis 2.

One end of each of the two third ropes 12 corresponding to each of the third turning wheels 8 passes by the corresponding ninth guide wheel 23 in the opposite direction, and then is wound by and fixed to the third turning wheel 8 in the opposite direction, and one end of each of the two fourth ropes 13 corresponding to each of the fourth turning wheels 9 passes by the corresponding tenth guide wheel 24 in the opposite direction, and then is wound by and fixed to the corresponding fourth turning wheel 9 in the opposite direction. Furthermore, the two third ropes 12 corresponding to each third pulley 8 are arranged crosswise in an X-shape between the third pulley 8 and the corresponding ninth guide pulley 23, and the two fourth ropes 13 corresponding to each fourth pulley 9 are arranged crosswise in an X-shape between the fourth pulley 9 and the corresponding tenth guide pulley 24.

The above-mentioned "opposite direction" means that one of the two directions is clockwise direction and the other is counterclockwise direction. Referring to fig. 3 in conjunction with fig. 4 and 5, for each of the two third ropes 12 of the third turning wheel 8 in fig. 3, the right end of the first third rope 12 passes around a ninth guiding wheel 23 in the counterclockwise direction, and the left end of the second third rope 12 passes around the ninth guiding wheel 23 in the clockwise direction; the right end of the first third rope 12 passes around the ninth guide wheel 23 and then is clockwise wound around and fixed to the third rotating wheel 8, and the left end of the second third rope 12 passes around the ninth guide wheel 23 and then is counterclockwise wound around and fixed to the third rotating wheel 8.

In this embodiment, each of the ninth and tenth guide wheels 23 and 24 guides the run of two rope portions, and the two rope portions exert a counteracting effect on the guide wheels in opposition to the radial force exerted by the guide wheels, thereby improving the smoothness of rotation of the ninth and tenth guide wheels 23 and 24. Two rope segments between runner and leading wheel are X style of calligraphy alternately arranged for aforementioned offset effect is more obvious, thereby further promotes the rotation smoothness degree of leading wheel.

In this embodiment the two third ropes 12 for each third wheel 8 are two independent ropes which are not directly connected. As mentioned above, one end of each of the two third ropes 12 corresponding to each of the third pulleys 8 is fixed to the third pulley 8, respectively, so that the two third ropes 12 corresponding to each of the third pulleys 8 are indirectly fixedly connected by the third pulley 8. It should be noted that the two third ropes 12 corresponding to each third wheel 8 may also be directly connected without the aid of the third wheel 8 to form a long rope, and then the non-end position of the long rope is locked to the third wheel 8 by means of a fastener. In this way, the scope of protection of claim 1 of the present application does not exclude the fact that, in correspondence with two third ropes 12 each being wound and fixed in opposite directions on a respective one of the third wheels 8. The details are described in the following example two.

Similarly, the two fourth ropes 13 corresponding to each fourth wheel 9 can also adopt the similar structure.

As mentioned above, the "wrapping" of the third and fourth ropes 12, 13 around the third and fourth wheels 8, 9 may be either full or non-full. However, if each third rope 12 and fourth rope 13 is wound around the corresponding third wheel 8 and fourth wheel 9 for a whole circumference (greater than 360 °), there will be the drawback that:

under the power of the driving device 4, the rope may pull the third rotating wheel 8 and the fourth rotating wheel 9 to turn over all the round or even several weeks, and then the photovoltaic panel 3 is driven to rotate all the round. If it is ensured that the photovoltaic panel 3 can rotate around the whole circle, the length of the photovoltaic panel 3 must be smaller than the length of the rotating shaft 2, otherwise (i.e. the length of the photovoltaic panel 3 is larger than the length of the rotating shaft 2), the photovoltaic panel 3 must be blocked and collided by the first support 1, and structural damage is caused. However, reducing the length of the photovoltaic panel 3 not only reduces the power generation capacity of the photovoltaic system, but also increases the overall cost of the photovoltaic system.

For the above reasons, in order to limit the rotatable range of the photovoltaic panel 3 to an angle that does not block collision with the first rack 1, the present embodiment is designed such that: the sum of the angles of the two third ropes 12 for each third wheel 8 around the third wheel 8 is less than 360 degrees and the sum of the angles of the two fourth ropes 13 for each fourth wheel 9 around the fourth wheel 9 is less than 360 degrees.

When one of the third ropes 12 pulls the corresponding third pulley 8 to rotate, the rope portion is unwound from the third pulley 8, and its winding angle on the third pulley 8 gradually decreases. After the third rope 12 is unwound until the end of the third rope 12 is straightened and the direction of the pulling force on the third wheel 8 passes through the rotation axis of the third wheel 8, the pulling force of the third rope 12 on the third wheel 8 does not generate a rotation moment, no matter how much pulling force is applied to the third wheel 8 by the third rope 12 at this time, the third wheel 8 does not continue to rotate due to the pulling force, and the unwinding angle of the third wheel 8 is about the original surrounding angle. Similarly, the unwinding angle of another third rope 12 corresponding to and adjacent to the third rope 12 has the same characteristic. Therefore, if the sum of the angles of the two third ropes 12 corresponding to each third wheel 8 around the third wheel 8 is less than 360 degrees, and the sum of the angles of the two fourth ropes 13 corresponding to each fourth wheel 9 around the fourth wheel 9 is less than 360 degrees, it can be ensured that the angles of rotation of each third wheel 8 and each fourth wheel 9 are generally less than 360 degrees, and the angle of rotation of the photovoltaic panel 3 is less than 360 degrees.

The rotation of the rotating shaft 2 can only realize the angle adjustment of the photovoltaic panel 3 in one direction, and cannot realize the simultaneous tracking of the longitude and the latitude of the sunlight by the photovoltaic panel 3. In view of this, in another embodiment, the photovoltaic system is further provided with a second support above which the first support 1 is connected in a manner rotatable about the first axis, the weight of the first support 1 being supported by the second support. Wherein the first axis is perpendicular to the rotating shaft 2. So for each photovoltaic board 3 can rotate around two rotation axis of mutually perpendicular, and then can realize photovoltaic board 3 to the real-time vertical tracking of sunshine. The rotation of the first carriage 1 on the second carriage is driven by another motor.

In the present embodiment, the first rope 10, the second rope 11, the third rope 12, and the fourth rope 13 are all steel wires.

It should be noted that the first cord segment 1001, the second cord segment 1002, the third cord segment 1101, and the fourth cord segment 1102 may be replaced by a guide rod that is not easily bent and deformed, such as a metal rod. For example, in another embodiment, the two ends of the first rope 10 are respectively led out from the two sides of the first wheel 6 and respectively connected with the first pull rod and the second pull rod extending along the first direction F1, and the two ends of the second rope 11 are respectively led out from the two sides of the second wheel and respectively connected with the third pull rod and the fourth pull rod extending along the first direction F1. The positions and functions of the first pull rod, the second pull rod, the third pull rod and the fourth pull rod are respectively the same as those of the first rope section 1001, the second rope section 1002, the third rope section 1101 and the fourth rope section 1102, and can be understood by referring to the above description, which is not described herein again.

It can be understood that the first string section 1001, the second string section 1002, the third string section 1101 and the fourth string section 1102, which are relatively soft, are replaced by guide rods that are not easily bent and deformed, so as to ensure that the "other end" of each third string 12 and fourth string 13 has a very stable relative position on the corresponding guide rods, which is more beneficial to promote the rotation synchronism of each photovoltaic panel 3.

< example two >

Fig. 9 to 15 show a partial structure of a photovoltaic system in an embodiment two of the present application, which has substantially the same structure as the photovoltaic system in the embodiment one, and can be understood with reference to the description of the embodiment one. Hereinafter, the differences between the present embodiment and the first embodiment will be described with emphasis.

Referring to fig. 11, in the present embodiment, the lead screw includes a first rod segment 501, a first elastic element 508, a second rod segment 502, a third rod segment 503, a fourth rod segment 504, a fifth rod segment 505, a sixth rod segment 506, a second elastic element 509, and a seventh rod segment 507, which are sequentially connected along a first direction F1. Two ends of the third rod section 503 are respectively in threaded connection with the second rod section 502 and the fourth rod section 504, and therefore the distance between the second rod section 502 and the fourth rod section 504 is adjusted by rotating the third rod section 503, and further the tension of the third rope section 1101 is adjusted. The two ends of the fifth rod section 505 are respectively in threaded connection with the fourth rod section 504 and the sixth rod section 506, and therefore the distance between the fourth rod section 504 and the sixth rod section 506 is adjusted by rotating the fifth rod section 505, and further the tension of the fourth rope section 1102 is adjusted. The spindle nut is in particular in threaded connection with the fourth rod section 504 of the spindle. In the present embodiment, the first elastic element 508 and the second elastic element 509 are both springs extending along the first direction F1.

It can be understood that, the lead screw adopts the structure, can guarantee that the first rope 10 and the second rope 11 have enough large dischargeable amount during the work, and prevent the tensile stress that the first rope 10 and the second rope 11 receive during the work from being too large.

In addition, referring to fig. 12 to 15, in the present embodiment, two third ropes 12 corresponding to each third pulley 8 are integrally connected to form a long rope, the long rope is divided into two third ropes 12 (or rope segments) virtually by taking the third pulley 8 as a partition, and the non-end position of the long rope is fixed on the third pulley 8. Specifically, a clamping groove 801 is formed in the third rotating wheel 8, a clamping block 25 is arranged in the middle of the two integrally connected third ropes 12 (namely, the long ropes), and the clamping block 25 is clamped in the clamping groove 801, so that the two third ropes 12 are fixedly connected with the third rotating wheel 8. Preferably, a screw for locking block 25 to third wheel 8 is also provided. The two fourth ropes 13 corresponding to each fourth wheel 9 are also designed similarly, and are not described in detail herein.

Referring to fig. 13 and 14, in the present embodiment, the two third ropes 12 of each third turning wheel 8 are fixed to the first rope portion 1001 and the third rope portion 1101 in such a way that: for convenience of description, the two third ropes 12 corresponding to each third wheel 8 are referred to herein as a first third rope 12 and a second third rope 12, respectively, wherein the first third rope 12 is fixed to the first rope portion 1001 by a first connector 26, and the second third rope 12 is fixed to the third rope portion 1101 by a second connector 27. The first connector 26 includes a first body 2601 fixed to the first string section 1001 and a second body 2602 fixed to the first third string 12, the first body 2601 includes a first through hole 2601a extending in the first direction F1, the second body 2602 includes a first screw 2602a extending in the forward direction of the first direction F1, and the first screw 2602a is movably threaded through the first through hole 2601a and is threadedly connected to the first nut 2603. The second connector 27 comprises a third body 2701 fixed with the third rope portion 1101 and a fourth body 2702 fixed with the second third rope 12, the third body 2701 comprises a second through hole extending along the first direction F1, the fourth body 2702 comprises a second screw 2702a protruding along the negative direction of the first direction F1, and the second screw 2702a movably penetrates through the second through hole and is in threaded connection with the second nut 2703.

It will be appreciated that, in use, the position of the end of the third cord 12 on the first cord segment 1001 and the third cord segment 1101 may be adjusted by rotating the first nut 2603 and the second nut 2703, thereby adjusting the tension of the third cord 12.

Further, referring to fig. 14 and 15, the first body 2601 includes a third through hole 2601b sleeved outside the first string section 1001 and welded to the first string section 1001, and a first cavity 2601c for accommodating the second body 2602. The second body 2602 includes a first card slot 2602b and a first guide hole 2602 c. One end of the first and third ropes 12 is provided with a first chuck 1201 detachably engaged in the first engaging groove 2602 b. The first rope segment 1001 passes through the first guiding hole 2602c, and the second body 2602 can slide along the length direction of the first rope segment 1001. The third body 2701 comprises a fourth through hole sleeved outside the third string section 1101 and welded and fixed with the third string section 1101, and a second chamber 2701c for accommodating the fourth body 2702. The fourth body 2702 includes a second locking groove 2702b and a second guiding hole 2702c, and one end of the second third rope 12 is provided with a second locking head 1202 detachably locked in the second locking groove 2702 b. The third rope segment 1101 passes through the second guiding hole 2702c, and the fourth body 2702 can slide along the length direction of the second rope segment 1101.

After assembly, the second body 2602 is located in the first cavity 2601c, the first cavity 2601c is used for preventing the first chuck 1201 from being separated from the first slot 2602b, the fourth body 2702 is located in the second cavity 2701c, and the second cavity 2701c is used for preventing the second chuck 1202 from being separated from the second slot 2702 b.

The two fourth ropes 13 corresponding to each fourth wheel 9 are fixed to the second rope portion 1002 and the fourth rope portion 1102 in a similar structure, which is not described in detail herein.

The above are exemplary embodiments of the present application only, and are not intended to limit the scope of the present application, which is defined by the appended claims.

Claims (11)

1. A photovoltaic system, comprising:

a first bracket;

a plurality of rotating shafts which are arranged in parallel with each other in a first direction and each of which is connected to the first bracket so as to be rotatable about its own axis;

a plurality of photovoltaic panels arranged in the first direction and fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively; and

the driving device is connected with the rotating shafts through a transmission assembly so as to drive the rotating shafts to rotate around respective axes;

characterized in that the transmission assembly comprises:

the reciprocating pull rod can reciprocate along the first direction under the driving of the driving device;

a first wheel and a second wheel rotatably connected to the reciprocating pull rod;

a plurality of third rotating wheels coaxially fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively, and arranged in a first row at intervals along the first direction;

a plurality of fourth rotating wheels coaxially fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively, and arranged in a second row spaced apart from each other along the first direction, wherein the second row is parallel to the first row;

the first rope is connected with the first rotating wheel in a winding mode and comprises a first rope section and a second rope section which are led out from two sides of the first rotating wheel respectively and then extend out in the forward direction of the first direction;

the second rope is connected with the second rotating wheel in a winding mode and comprises a third rope section and a fourth rope section which are led out from two sides of the second rotating wheel respectively and then extend out along the negative direction of the first direction, the first rope section and the third rope section correspond to the first row, and the second rope section and the fourth rope section correspond to the second row;

a plurality of third ropes, each of the third pulleys corresponding to two of the third ropes, respectively, and one ends of the two third ropes corresponding to each of the third pulleys surrounding and fixed to the third pulley in opposite directions, respectively, and the other ends of the two third ropes corresponding to each of the third pulleys fixed to the first rope segment and the third rope segment, respectively; and

a plurality of fourth ropes, each of the fourth pulleys corresponds to two of the fourth ropes, and one end of the two fourth ropes corresponding to each of the fourth pulleys surrounds and is fixed to the fourth pulley in opposite directions, respectively, and the other end of the two fourth ropes corresponding to each of the fourth pulleys is fixed to the second rope segment and the fourth rope segment, respectively.

2. The photovoltaic system of claim 1, wherein the transmission assembly comprises a first guide wheel, a second guide wheel, a third guide wheel and a fourth guide wheel which are rotatably connected to the first support and are distributed in a rectangular shape, wherein the first guide wheel and the second guide wheel are respectively arranged at two opposite sides of the third rotating wheels along the first direction, the third guide wheel and the fourth guide wheel are respectively arranged at two opposite sides of the fourth rotating wheels along the first direction, and the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are sequentially arranged along the circumferential direction;

one end of the first rope is wound out of the first rotating wheel and then directly extends in the positive direction of the first direction by passing the first guide wheel, so that the first rope section is formed; the other end of the first rope is wound out of the first rotating wheel and then directly extends in the positive direction of the first direction by passing the fourth guide wheel, so that a second rope section is formed; one end of the second rope is wound out of the second rotating wheel and then directly extends along the negative direction of the first direction by passing the second guide wheel, so that a third rope section is formed; the other end of the second rope is wound out of the second rotating wheel and then directly extends along the negative direction of the first direction by passing the third guide wheel, so that a fourth rope section is formed.

3. The photovoltaic system of claim 2, wherein the transmission assembly comprises:

a fifth guide wheel and a sixth guide wheel rotatably connected to the first bracket and located between the first guide wheel and the fourth guide wheel, an

Seventh and eighth guide wheels rotatably connected to the first carriage and located between the second and third guide wheels;

one end of the first rope sequentially bypasses the fifth guide wheel and the first guide wheel after being wound out of the first rotating wheel, the other end of the first rope segment sequentially bypasses the sixth guide wheel and the fourth guide wheel after being wound out of the first rotating wheel, the first rope between the first rotating wheel and the fifth guide wheel extends along the first direction, and the first rope between the first rotating wheel and the sixth guide wheel extends along the first direction;

one end of the second rope sequentially bypasses the seventh guide wheel and the second guide wheel after being wound out from the second rotating wheel, the other end of the second rope section sequentially bypasses the eighth guide wheel and the third guide wheel after being wound out from the second rotating wheel, the second rope between the second rotating wheel and the seventh guide wheel is arranged in an extending mode along the first direction, and the first rope between the second rotating wheel and the eighth guide wheel is arranged in an extending mode along the first direction.

4. The photovoltaic system of claim 1, wherein the reciprocating pull rod is a lead screw extending in the first direction, the transmission assembly further comprises a lead screw base fixed to the first bracket, and a lead screw nut rotatably connected to the lead screw base and threadedly connected to the lead screw, and the driving device is a motor fixed to the lead screw base and driving the lead screw nut to rotate.

5. Photovoltaic system according to claim 4, wherein the lead screw comprises a first rod section, a first elastic element, a second rod section, a third rod section, a fourth rod section, a fifth rod section, a sixth rod section, a second elastic element and a seventh rod section connected in sequence along the first direction, wherein both ends of the third rod section are in threaded connection with the second rod section and the fourth rod section, respectively, and whereby the distance of the second rod section from the fourth rod section is adjusted by rotating the third rod section, wherein both ends of the fifth rod section are in threaded connection with the fourth rod section and the sixth rod section, respectively, and whereby the distance of the fourth rod section from the sixth rod section is adjusted by rotating the fifth rod section, wherein the lead screw nut is in threaded connection with the fourth rod section in particular.

6. The photovoltaic system according to claim 1, wherein the two third ropes corresponding to at least one of the third pulleys are integrally connected, and non-end positions of the integrally connected two first ropes are fixed to the first pulleys corresponding to the two first ropes; the two fourth ropes corresponding to at least one of the fourth pulleys are integrally connected, and the non-end positions of the two integrally connected fourth ropes are fixed to the second pulleys corresponding to the two fourth ropes.

7. The photovoltaic system of claim 1, wherein the drive assembly further comprises a plurality of ninth steerable wheels and a plurality of tenth steerable wheels, the plurality of ninth steerable wheels are arranged in a third row along the first direction and the plurality of ninth steerable wheels are in one-to-one correspondence with the plurality of third wheels, respectively, the plurality of tenth steerable wheels are arranged in a fourth row along the first direction and the plurality of tenth steerable wheels are in one-to-one correspondence with the plurality of fourth wheels, respectively;

the third row is parallel to the first row and both define a third plane, the fourth row is parallel to the second row and both define a fourth parallel, the third plane and the fourth plane are both perpendicular to the axis of rotation;

one end of each of the two third ropes corresponding to each third turning wheel respectively bypasses the corresponding ninth guide wheel in the opposite direction and then surrounds and is fixed to the third turning wheel in the opposite direction, and one end of each of the two fourth ropes corresponding to each fourth turning wheel respectively bypasses the corresponding tenth guide wheel in the opposite direction and then surrounds and is fixed to the fourth turning wheel in the opposite direction;

the two third ropes corresponding to each third rotating wheel are arranged between the third rotating wheel and the corresponding ninth guide wheel in an X-shaped crossed mode, and the two fourth ropes corresponding to each fourth rotating wheel are arranged between the fourth rotating wheel and the corresponding tenth guide wheel in an X-shaped crossed mode.

8. The photovoltaic system of claim 1, wherein the sum of the angles of the two third ropes on the third wheel for each of the third wheels is less than 360 degrees, and the sum of the angles of the two fourth ropes on the fourth wheel for each of the fourth wheels is less than 360 degrees.

9. A photovoltaic system, comprising:

a first bracket;

a plurality of rotating shafts which are arranged in parallel with each other in a first direction and each of which is connected to the first bracket so as to be rotatable about its own axis;

a plurality of photovoltaic panels arranged in the first direction and fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively; and

the driving device is connected with the rotating shafts through a transmission assembly so as to drive the rotating shafts to rotate around respective axes;

the transmission assembly includes:

the reciprocating pull rod can reciprocate along the first direction under the driving of the driving device;

a first wheel and a second wheel rotatably connected to the reciprocating pull rod;

a plurality of third rotating wheels coaxially fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively, and arranged in a first row at intervals along the first direction;

a plurality of fourth rotating wheels coaxially fixed to the plurality of rotating shafts in a one-to-one correspondence, respectively, and arranged in a second row spaced apart from each other along the first direction, wherein the second row is parallel to the first row;

the first rope is connected with the first rotating wheel in a winding mode, and two ends of the first rope are led out from two sides of the first rotating wheel respectively and then are connected with a first pull rod and a second pull rod which extend along the first direction respectively;

the second rope is connected with the second rotating wheel in a winding manner, two ends of the second rope are respectively led out from two sides of the second rotating wheel and then are respectively connected with a third pull rod and a fourth pull rod which extend along the first direction, the first pull rod and the third pull rod correspond to the first row, and the second pull rod and the fourth pull rod correspond to the second row;

a plurality of third ropes, each of the third pulleys corresponding to two of the third ropes, respectively, and one ends of the two third ropes corresponding to each of the third pulleys surrounding and fixed to the third pulley in opposite directions, respectively, and the other ends of the two third ropes corresponding to each of the third pulleys being fixed to the first link and the third link, respectively; and

and a plurality of fourth ropes, each of the fourth pulleys corresponds to two of the fourth ropes, and one end of the two fourth ropes corresponding to each of the fourth pulleys surrounds and is fixed to the fourth pulley in opposite directions, respectively, and the other end of the two fourth ropes corresponding to each of the fourth pulleys is fixed to the second pull rod and the fourth pull rod, respectively.

10. The photovoltaic system of claim 9, wherein the reciprocating pull rod is a lead screw extending in the first direction, the transmission assembly further comprises a lead screw base fixed to the first bracket, and a lead screw nut rotatably connected to the lead screw base and threadedly connected to the lead screw, and the driving device is a motor fixed to the lead screw base and driving the lead screw nut to rotate.

11. The photovoltaic system of claim 9, wherein the drive assembly further comprises a plurality of ninth steerable wheels and a plurality of tenth steerable wheels, the plurality of ninth steerable wheels are arranged in a third row along the first direction and the plurality of ninth steerable wheels are in one-to-one correspondence with the plurality of third wheels, respectively, the plurality of tenth steerable wheels are arranged in a fourth row along the first direction and the plurality of tenth steerable wheels are in one-to-one correspondence with the plurality of fourth wheels, respectively;

the third row is parallel to the first row and both define a third plane, the fourth row is parallel to the second row and both define a fourth parallel, the third plane and the fourth plane are both perpendicular to the axis of rotation;

one end of each of the two third ropes corresponding to each third turning wheel respectively bypasses the corresponding ninth guide wheel in the opposite direction and then surrounds and is fixed to the third turning wheel in the opposite direction, and one end of each of the two fourth ropes corresponding to each fourth turning wheel respectively bypasses the corresponding tenth guide wheel in the opposite direction and then surrounds and is fixed to the fourth turning wheel in the opposite direction;

the two third ropes corresponding to each third rotating wheel are arranged between the third rotating wheel and the corresponding ninth guide wheel in an X-shaped crossed mode, and the two fourth ropes corresponding to each fourth rotating wheel are arranged between the fourth rotating wheel and the corresponding tenth guide wheel in an X-shaped crossed mode.

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