Tracking type photovoltaic support with folding function and photovoltaic device

Abstract

The invention discloses a tracking type photovoltaic support with a folding function, which comprises a fixed support and two groups of driving mechanisms, and is characterized in that the first driving mechanism is fixedly connected with one side of the fixed support, and the second driving mechanism is fixedly connected with the other side of the fixed support; the driving mechanism is provided with a fixed part and a rotating part, and the fixed part and the rotating part can rotate relatively; the fixed part is fixedly connected with the fixed support, and the rotating part is used for being fixedly connected with a photovoltaic panel. The photovoltaic panels can be prevented from shielding each other in the sunlight tracking process, and therefore the land utilization rate is increased. The invention further discloses a tracking type photovoltaic device with a folding function.

Description

Technical Field

[0001] This invention relates to a photovoltaic power generation device, specifically to a tracking photovoltaic support with a folding function. This invention also relates to a tracking photovoltaic device with a folding function. Background Technology

[0002] Solar energy, as a clean and renewable energy source, is being used more and more widely. Solar photovoltaic power generation equipment uses solar photovoltaic modules as photoelectric conversion devices to convert solar energy into electrical energy, thereby realizing the utilization of solar energy.

[0003] Currently, a common method to increase the power generation of photovoltaic equipment per unit time is to maximize the size of the photovoltaic panels. For example, a photovoltaic device disclosed in Chinese utility model patent document CN216122306U includes multiple photovoltaic panels arranged in a linear fashion, thereby significantly increasing the size of the photovoltaic panels and thus greatly increasing the power generation.

[0004] Another common method to increase power generation is to use solar panels that track the sun. This is because the power output of a photovoltaic (PV) system depends on the amount of solar radiation received by the panels. To improve the efficiency of a PV system, the upper surface of the panels must always face the sun to maximize the vertical irradiation area, thereby improving photoelectric conversion efficiency. For example, Chinese invention patent document CN106130459B discloses a PV bracket that automatically tracks the optimal angle of sunlight. This bracket has adaptive adjustment functions for different latitudes and longitudes, and different time periods, ensuring that sunlight hits the PV panels at the optimal angle of incidence.

[0005] However, in order to rotate the photovoltaic panel, the connection between the photovoltaic support and the panel needs to be located near the center of the panel, and each support can only use one panel. If the two photovoltaic systems are too close together, the two panels will cast shadows during tracking, causing mutual shading, which directly affects power generation efficiency. Figure 1 As shown, the second photovoltaic panel 200 blocks area A of the first photovoltaic panel 100, reducing the light-receiving area of ​​the first photovoltaic panel 100.

[0006] However, if the problem of shading is solved by increasing the spacing between the two sets of photovoltaic devices, it will lead to low land utilization. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a tracking photovoltaic bracket with folding function, which can prevent photovoltaic panels from shading each other during the process of tracking sunlight, thereby improving land utilization.

[0008] To solve the above-mentioned technical problems, the technical solution of the present invention for a tracking photovoltaic bracket with folding function is as follows:

[0009] The device includes a fixed bracket and two sets of drive mechanisms (i.e., a first drive mechanism and a second drive mechanism). The first drive mechanism is fixedly connected to one side of the fixed bracket, and the second drive mechanism is fixedly connected to the other side of the fixed bracket. Each drive mechanism has a fixed component and a rotating component, which can rotate relative to each other. The fixed component is fixedly connected to the fixed bracket, and the rotating component is used to fixally connect to the photovoltaic panel. The drive mechanism also includes an intermediate component, which is movably connected to the rotating component. The intermediate component and the rotating component are guided by a first guide structure. The intermediate component is movably connected to the fixed component, and the intermediate component and the fixed component are guided by a second guide structure.

[0010] In another embodiment, the fixing member is a housing, and the rotating member is a screw rod; or, the fixing member is a screw rod, the rotating member is a housing, and the intermediate member is a sliding sleeve.

[0011] In another embodiment, the first guide structure is a spiral guide structure; the second guide structure is an axial guide structure; or, the first guide structure is an axial guide structure; and the second guide structure is a spiral guide structure.

[0012] The spiral guide structure of the present invention enables the sliding sleeve to move linearly along the axial direction of the spiral rod while simultaneously achieving relative rotation between the sliding sleeve and the spiral rod; the axial guide structure of the present invention ensures that the sliding sleeve can only move linearly relative to the outer shell and cannot rotate relative to the outer shell.

[0013] When the screw rod of this invention rotates relative to the outer casing, it can drive the photovoltaic panel to rotate, thereby achieving sunlight tracking. When the photovoltaic panel rotates to its lowest point, it can be folded and retracted.

[0014] In another embodiment, the driving mechanism further includes a driven member and a driving member. The driven member is fixedly connected to the sliding sleeve; the driving member is connected to a power source. Under the drive of the power source, the driving member drives the driven member, which can drive the sliding sleeve to make linear movements along the axial direction of the helical rod.

[0015] In another embodiment, the helix angle of the spiral guide structure does not exceed 40°.

[0016] In another embodiment, the helix angle of the spiral guide structure is greater than 5° and less than 25°.

[0017] In another embodiment, the driving member is a lead screw and the driven member is a lead screw nut; the rotation of the lead screw drives the lead screw nut and the sliding sleeve to translate along the axial direction of the screw rod, causing relative rotation between the screw rod and the sliding sleeve, thereby realizing relative rotation between the screw rod and the outer shell.

[0018] In another embodiment, the sliding sleeve has a through hole, and the sliding sleeve is sleeved on the spiral rod through the through hole; the spiral guide structure is a spiral groove provided on the inner wall of the through hole and a spiral protrusion provided on the outer peripheral surface of the spiral rod;

[0019] In another embodiment, the spiral guide structure is a spiral protrusion disposed on the inner wall of the through hole and a spiral groove disposed on the outer peripheral surface of the spiral rod;

[0020] In another embodiment, the spiral guide structure comprises a first spiral groove disposed on the inner wall of the through hole, a second spiral groove disposed on the outer circumferential surface of the spiral rod, and a plurality of balls disposed between the first spiral groove and the second spiral groove.

[0021] In another embodiment, the outer peripheral surface of the sliding sleeve is formed with a first axial guide structure extending axially, and the outer shell is provided with a second axial guide structure adapted to the first axial guide structure; the first axial guide structure and the second axial guide structure constitute the axial guide structure between the sliding sleeve and the outer shell. The movable connection between the sliding sleeve and the outer shell is achieved through the cooperation of the first axial guide structure and the second axial guide structure.

[0022] In another embodiment, the first axial guide structure is a guide protrusion, and the second axial guide structure is a guide groove;

[0023] In another embodiment, the first axial guide structure is a guide groove, and the second axial guide structure is a guide protrusion;

[0024] In another embodiment, an intermediate component of an axial guide structure is also included. Both the first and second axial guide structures are guide grooves. The intermediate component of the axial guide structure is disposed between the first and second axial guide structures, thereby forming a guiding fit.

[0025] In another embodiment, the rotation axis of the first drive mechanism is parallel to the rotation axis of the second drive mechanism.

[0026] The present invention also provides a photovoltaic panel, the technical solution of which is as follows:

[0027] It includes a mounting part for forming a fixed connection with the outside, the mounting part being located at one end of the photovoltaic panel.

[0028] In another embodiment, the photovoltaic panel has reinforcing ribs that extend from the mounting portion toward the other end of the photovoltaic panel.

[0029] The present invention also provides a tracking photovoltaic device with folding function, the technical solution of which is as follows:

[0030] The system includes a tracking photovoltaic bracket with a folding function and a photovoltaic panel. The mounting part of the photovoltaic panel is connected to the rotating part of the drive mechanism. The first drive mechanism of the tracking photovoltaic bracket is connected to the side of the first photovoltaic panel and can drive the first photovoltaic panel to rotate around its rotation axis. The second drive mechanism is connected to the side of the second photovoltaic panel and can drive the second photovoltaic panel to rotate around its rotation axis, so that the rotation axes of the first and second photovoltaic panels are located on both sides of the support pole.

[0031] In another embodiment, the fixed component of the drive mechanism is a housing, and the rotating component is a screw rod; the housing of the drive mechanism is fixedly connected to the fixed bracket; the housing is movably connected to one end of the upper support and the lower support, and the other ends of the upper support and the lower support are fixedly connected to the photovoltaic panel; the first output end of the screw rod of the drive mechanism is fixedly connected to one end of the first connecting arm, and the other end of the first connecting arm is fixedly connected to the lower support and / or the upper support; the second output end of the screw rod of the drive mechanism is fixedly connected to one end of the second connecting arm, and the other end of the second connecting arm is fixedly connected to the lower support and / or the upper support.

[0032] In another embodiment, the fixing component of the drive mechanism is a screw rod, and the rotating component is a housing; both ends of the screw rod of the drive mechanism are fixedly connected to the fixed bracket through connecting components; the housing of the drive mechanism is fixedly connected to one end of the upper support and the lower support, and the other ends of the upper support and the lower support are fixedly connected to the photovoltaic panel.

[0033] The technical effects that this invention can achieve are:

[0034] This invention enables sunlight tracking during use, improving photoelectric conversion efficiency. Furthermore, during tracking, even without increasing the spacing between the two photovoltaic panels, they will not block each other. Therefore, the photovoltaic panels maintain their maximum light-receiving surface at any operating angle, and their power generation efficiency will not be affected by mutual shading. Compared with existing technologies, this invention can reduce the footprint while maintaining the same power generation.

[0035] This invention enables the photovoltaic panels to be folded and retracted under severe weather or special circumstances, thereby reducing the overall impact of wind or other factors on the photovoltaic panels, reducing wind resistance, lowering the risk of wind damage to the equipment, and making the equipment more durable. Furthermore, when the invention is in the folded state, it also prevents snow accumulation on the photovoltaic panels and reduces the power generation attenuation rate, making the equipment more durable.

[0036] The drive mechanism of this invention can drive the screw rod to rotate within a small angle range by rotating the lead screw. Therefore, by controlling the number of rotations of the lead screw, this invention can precisely control the rotation angle of the screw rod, so that the upper surface of the photovoltaic panel faces the sun.

[0037] The driving mechanism of this invention can keep the photovoltaic panel in any posture without the need for an additional self-locking mechanism, thereby simplifying the structure.

[0038] This invention can significantly reduce the power requirements of the drive mechanism's power source, requiring only a smaller motor to maintain the photovoltaic panel's orientation, thereby keeping the upper surface of the photovoltaic panel facing the sun. Attached Figure Description

[0039] Those skilled in the art will understand that the following description is merely illustrative of the principles of the invention, which can be applied in various ways to achieve many different alternative implementations. These descriptions are intended only to illustrate the general principles of the teachings of the invention and are not intended to limit the inventive concept disclosed herein.

[0040] Embodiments of the invention are illustrated in conjunction with the accompanying drawings, which are incorporated in and form part of this specification, and together with the foregoing general description and the following detailed description of the drawings, serve to explain the principles of the invention.

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0042] Figure 1 This is a schematic diagram of an existing photovoltaic device;

[0043] Figure 2 This is a schematic diagram of the tracking photovoltaic device with folding function according to the present invention;

[0044] Figure 3 This is an exploded view of the tracking photovoltaic device with folding function of the present invention; only the first drive mechanism and the first photovoltaic panel and the connecting parts between them are shown in the figure;

[0045] Figure 4 This is an exploded view of the first embodiment of the drive mechanism of the present invention;

[0046] Figure 5 This is a partially enlarged schematic diagram of the screw rod of the present invention;

[0047] Figure 6 This is a schematic diagram of a second embodiment of the drive mechanism of the present invention;

[0048] Figure 7 This is an exploded view of a second embodiment of the drive mechanism of the present invention;

[0049] Figure 8 This is a schematic diagram of the tracking photovoltaic device with folding function of the present invention in tracking state;

[0050] Figure 9 This is a schematic diagram of the folding tracking photovoltaic device of the present invention in a folded and retracted state.

[0051] Explanation of the reference numerals in the figure:

[0052] 100 represents the first photovoltaic panel, and 200 represents the second photovoltaic panel.

[0053] 300 is the first drive mechanism, and 400 is the second drive mechanism.

[0054] 500 is the fixed support, 600 is the upright.

[0055] 501 is the lower support component, and 502 is the upper support component.

[0056] 503 is the first connecting arm, and 504 is the second connecting arm.

[0057] 11 is the helical rod, and 12 is the sliding sleeve.

[0058] 13 is the mounting base, and 14 is the lead screw.

[0059] 15 is the lead screw nut, and 16 is the outer casing.

[0060] 17 is the first bearing, and 18 is the second bearing.

[0061] 1101 represents the two ends of the helical rod, and 1102 represents the helical protrusion.

[0062] 1201 is a guide groove, and 1202 is a spiral groove.

[0063] 1203 is the positioning hole for the lead screw nut, and 1601 is the guide protrusion. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this invention pertains. The terms "first," "second," and similar words used herein do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "comprising," etc., mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0065] like Figure 2 The first embodiment of the tracking photovoltaic device with folding function of the present invention is shown. The tracking photovoltaic device includes a pole 600, a first photovoltaic panel 100, and a second photovoltaic panel 200. The upper end of the pole 600 is fixedly connected to a fixing bracket 500. One side of the fixing bracket 500 is fixedly connected to a first driving mechanism 300, which is connected to the inner side of the first photovoltaic panel 100. The first driving mechanism 300 has a housing 16 and a screw rod 11, which can rotate relative to the housing 16. The first driving mechanism 300 can drive the first photovoltaic panel 100 to rotate around its axis of rotation. The other side of the fixing bracket 500 is fixedly connected to a second driving mechanism 400, which is connected to the inner side of the second photovoltaic panel 200. The structure of the second driving mechanism 400 is the same as that of the first driving mechanism 300, and the second driving mechanism 400 can drive the second photovoltaic panel 200 to rotate around its axis of rotation.

[0066] In this invention, the rotation axes of the first photovoltaic panel 100 and the second photovoltaic panel 200 are respectively set on both sides of the pole 600, and the connection part between the photovoltaic panel and the drive mechanism is set on the side of the photovoltaic panel. During the rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200, no matter what posture the first photovoltaic panel 100 and the second photovoltaic panel 200 are in, the first photovoltaic panel 100 and the second photovoltaic panel 200 will not block each other, so that the first photovoltaic panel 100 and the second photovoltaic panel 200 can always maintain their light-receiving surface at its maximum.

[0067] This invention places the mounting portion of the photovoltaic panel at one end of the panel, which can be either the side or the back near the side. During light tracking, because the photovoltaic panel is mounted at the end, its axis of rotation is also closer to the end. When two adjacent photovoltaic panels are positioned with their mounting portions facing each other, one panel rotates clockwise around its axis of rotation while tracking sunlight, and the other rotates counterclockwise. Therefore, the distance between the two panels can be smaller, and they will not block each other's light. Furthermore, this structure facilitates folding or retraction. Simultaneously, this structure places lower demands on the photovoltaic support structure, allowing for more flexible connection of the drive mechanism to the fixed support; that is, two sets of drive mechanisms can be directly mounted opposite each other on the pole without the need for cantilever arms.

[0068] This invention features smaller spacing between adjacent photovoltaic panels, thus reducing the footprint. While reducing the footprint, the retractable design also minimizes environmental impact on the surrounding environment, protecting the ecosystem. Furthermore, the retractable or foldable mechanism of this invention protects against severe weather conditions such as snow and wind, making it safer and more reliable.

[0069] Preferably, the rotation axis of the first drive mechanism 300 is parallel to the rotation axis of the second drive mechanism 400.

[0070] Of course, even if the rotation axis of the first drive mechanism 300 is not parallel to the rotation axis of the second drive mechanism 400, as long as the width of the fixed bracket 500 is changed so that there is sufficient distance between the first drive mechanism 30 and the second drive mechanism 400, mutual interference between the first photovoltaic panel 100 and the second photovoltaic panel 200 can be avoided.

[0071] Specifically, such as Figure 3 As shown, the outer shell 16 of the first drive mechanism 300 is fixedly connected to the fixed bracket 500; the lower part of the outer shell 16 is movably connected to one end of the lower support member 501, and the other end of the lower support member 501 is fixedly connected to the upper surface of the first photovoltaic panel 100; the upper part of the outer shell 16 is movably connected to one end of the upper support member 502, and the other end of the upper support member 502 is fixedly connected to the lower surface of the first photovoltaic panel 100; the upper support member 502 and one end of the lower support member 501 form a transmission mechanism fixing cover, which encloses the middle part of the outer shell 16 and is rotatable relative to the outer shell 16;

[0072] The first output end of the screw rod 11 of the first drive mechanism 300 is fixedly connected to one end of the first connecting arm 503, and the other end of the first connecting arm 503 is fixedly connected to the lower support member 501 and / or the upper support member 502; the second output end of the screw rod 11 of the first drive mechanism 300 is fixedly connected to one end of the second connecting arm 504, and the other end of the second connecting arm 504 is fixedly connected to the lower support member 501 and / or the upper support member 502.

[0073] The present invention achieves a movable connection between the outer shell 16 and the first photovoltaic panel 100 through the upper support member 502 and the lower support member 501; and achieves a fixed connection between the screw rod 11 and the first photovoltaic panel 100 through the first connecting arm 503 and the second connecting arm 504; when the screw rod 11 rotates relative to the outer shell 16, it can drive the first photovoltaic panel 100 to rotate relative to the outer shell 16 and the upright 600 fixedly connected to the outer shell 16, thereby achieving solar tracking.

[0074] The connection relationship between the second drive mechanism 400 and the second photovoltaic panel 200 is the same as the connection relationship between the first drive mechanism 400 and the first photovoltaic panel 100, and will not be repeated here.

[0075] The first drive mechanism 300 and the second drive mechanism 400 of the present invention have the same structure and can be adopted as follows: Figure 4 The drive mechanism shown is a first embodiment of the drive mechanism of the present invention. The drive mechanism includes a helical rod 11 (as a rotating member), and the two ends 1101 of the helical rod 11 serve as the output ends of the drive mechanism for connecting the first connecting arm 503 and the second connecting arm 504. A sliding sleeve 12 is movably sleeved on the helical rod 11.

[0076] The sliding sleeve 12 has a through hole, and the sliding sleeve 12 is sleeved on the spiral rod 11 through the through hole. The outer peripheral surface of the spiral rod 11 has a spiral protrusion 1102 extending spirally around its axis. The inner wall of the through hole of the sliding sleeve 12 has a spiral groove 1202 that matches the spiral protrusion 1102. The spiral protrusion 1102 and the spiral groove 1202 form a spiral guide structure between the sliding sleeve 12 and the spiral rod 11. The spiral guide connection between the sliding sleeve 12 and the spiral rod 11 is realized through the cooperation of the spiral groove 1202 and the spiral protrusion 1102.

[0077] The spiral guide structure between the sliding sleeve 12 and the spiral rod 11 can also adopt other structures that can produce a spiral guiding effect; for example, a spiral groove can be set on the outer peripheral surface of the spiral rod 11, and a spiral protrusion can be set on the inner wall of the through hole of the sliding sleeve 12; or a first spiral groove can be set on the inner wall of the through hole of the sliding sleeve 12, a second spiral groove can be set on the outer peripheral surface of the spiral rod 11, and multiple balls can be set between the first spiral groove and the second spiral groove, which can also realize the spiral guiding connection between the sliding sleeve 12 and the spiral rod 11.

[0078] The sliding sleeve 12 is connected to the transmission component; the transmission component includes an active component connected to the power source and a driven component fixedly connected to the sliding sleeve 12; under the drive of the power source, the active component drives the driven component, thereby causing the sliding sleeve 12 to move linearly along the axial direction of the helical rod 11.

[0079] Specifically, the sliding sleeve 12 has a lead screw nut positioning hole 1203, and a lead screw nut 15 (driven member) is inserted into the lead screw nut positioning hole 1203. The lead screw nut 15 is fixedly connected to the sliding sleeve 12 by multiple bolts.

[0080] The lead screw nut 15 has an internal threaded hole, and the lead screw nut 15 is movably connected to the lead screw 14 (driving element) through the internal threaded hole;

[0081] Both ends of the lead screw 14 are connected to the mounting base 13 via the first bearing 17; the lead screw 14 can rotate relative to the fixed mounting base 13; one end of the lead screw 14 serves as the input end of the drive mechanism and is connected to the power source; the power source can be an electrically driven motor, a cylinder driven by compressed air, or a hydraulic cylinder driven by liquid, etc.

[0082] The two ends of the screw rod 11 are movably connected to the mounting base 13 via the second bearing 18; the screw rod 11 can rotate relative to the fixed mounting base 13.

[0083] The outer cover of the screw rod 11 is provided with a housing 16 (as a fastener);

[0084] The outer peripheral surface of the sliding sleeve 12 is formed with a first axial guide structure extending along the axial direction, and the outer shell 16 is provided with a second axial guide structure adapted to the first axial guide structure; the first axial guide structure and the second axial guide structure cooperate with each other.

[0085] Specifically, the outer peripheral surface of the sliding sleeve 12 is formed with an axially extending guide groove 1201 as a first axial guide structure, and the inner wall of the outer shell 16 is formed with a guide protrusion 1601 that cooperates with the guide groove 1201 of the sliding sleeve 12 as a second axial guide structure; the sliding sleeve 12 and the outer shell 16 are connected movably through the cooperation of the guide groove 1201 and the guide protrusion 1601.

[0086] Of course, the first axial guide structure can be a guide protrusion and the second axial guide structure can be a guide groove; or, both the first and second axial guide structures can be guide grooves, and multiple intermediate parts of the axial guide structures can be set between the first and second axial guide structures to form a guide fit, such as ball bearings, which can also realize the movable connection between the sliding sleeve 12 and the outer shell 16.

[0087] The working principle of the drive mechanism of the present invention is as follows:

[0088] A power source (such as a motor) drives the lead screw 14 to rotate. The rotation of the lead screw 14 causes the lead screw nut 15 to translate along the axis of the lead screw 14. The lead screw nut 15 drives the sliding sleeve 12 to translate along the axis of the helical rod 11. During the translation process, the sliding sleeve 12 guides the helical rod 11 around its own axis of rotation through the cooperation of the helical groove 1202 and the helical protrusion 1102, thereby realizing the small-angle rotation of the helical rod 11.

[0089] Since the sliding sleeve 12 achieves a movable connection with the outer shell 16 through the cooperation of the guide groove 1201 and the guide protrusion 1601, the translational movement of the sliding sleeve 12 driven by the screw nut 15 can be guided by the guide groove 1201 and the guide protrusion 1601, so as to avoid the rotation of the screw rod 11 affecting the linear movement of the sliding sleeve 12.

[0090] This invention enables the screw rod 11 to rotate within a small angle range (e.g., no more than 360°) using a power source. The maximum rotation angle of the screw rod 11 depends on the helix angle of the helical protrusion 1102 of the screw rod 11 and the length of the screw rod 11. By adjusting the helix angle of the helical protrusion 1102 of the screw rod 11 and the length of the screw rod 11, small-angle rotation of the screw rod 11 within a range not exceeding 180° can be achieved.

[0091] Preferably, the helix angle of the helical guide structure does not exceed 40°; wherein, the helix angle of the helical guide structure refers to the angle α between the helical guide structure (i.e., the helical protrusion 1102) and the rotation axis of the helical rod 11, such as... Figure 5 As shown.

[0092] Since the helix angle does not exceed 40°, when the helical rod 11 of this invention needs to rotate, the lead screw 14 rotates under the drive of the power source. The rotation of the lead screw 14 can easily drive the lead screw nut 15 and the sliding sleeve 12 to translate along the axis of the helical rod 11, thereby driving the helical rod 11 to rotate. This invention can achieve low-speed rotation of the helical rod 11 without a reduction mechanism.

[0093] During use, when the photovoltaic panel applies torque to the auger 11 under external force (for example, the auger 11 is subjected to huge torque due to strong wind blowing towards the photovoltaic panel), the auger 11 will transmit the external force to the sliding sleeve 12. Since the auger 11 and the sliding sleeve 12 are connected by the cooperation of the helical protrusion 1102 and the helical groove 1202, according to the force analysis, the auger 11 will apply a thrust along the axial direction of the auger 11 and a thrust along the circumferential direction of the auger 11 to the sliding sleeve 12, so that the sliding sleeve 12 will have a tendency to translate along the axial direction and rotate along the circumferential direction under the action of the thrust in the axial direction.

[0094] However, due to the guiding fit formed by the guide groove 1201 and the guide protrusion 1601, the sliding sleeve 12 can only move linearly relative to the outer shell 16 along the axis of the screw rod 11 and cannot rotate. Therefore, the thrust on the sliding sleeve 12 along the circumferential direction of the screw rod 11 will be directly transmitted to the outer shell 16, that is, to the fixing bracket 500 and the upright 600 used to fix the outer shell 16.

[0095] At the same time, as the power source drives the lead screw 14 to rotate, the lead screw 14 can provide a holding force to the sliding sleeve 12 through the lead screw nut 15, thereby counteracting the thrust on the sliding sleeve 12 along the axis of the helical rod 11.

[0096] With the combined action of the housing 16 and the power source, the drive shaft 301 of the present invention can prevent the sliding sleeve 12 from making abnormal movements relative to the screw rod 11 when encountering strong winds during operation, thereby preventing abnormal rotation of the screw rod 11 caused by strong winds.

[0097] Therefore, the screw rod 11 of the present invention has a better ability to resist external forces and its rotation state will not be affected by external forces.

[0098] More preferably, the helix angle of the spiral guide structure is greater than 5° and less than 25°.

[0099] Obviously, the smaller the helix angle, the smaller the thrust along the axis of the helical rod 11. At this time, only a smaller power source is needed to keep the helical rod 11 stationary, so as to prevent the helical rod 11 from being driven to rotate by the torque from the external load.

[0100] Furthermore, when the helix angle is small enough, the screw rod 11 can remain stationary without any power source. At this time, the thrust along the axis of the screw rod 11 after the external force is decomposed is equal to the frictional force between the guide groove 1201 and the guide protrusion 1601.

[0101] With the diameter of the screw rod 11 being 50 mm, the following data were obtained from a finite number of experiments at different angles, under varying helix angles of the helical guide structure:

[0102] When the helix angle is 40 degrees, when a force of 1000 Newtons is applied to the helical rod 11, in order to keep the helical rod 11 stationary, a force of approximately 850 Newtons is required along the axial direction of the helical rod 11; while in order to drive a load of 1000 Newtons, a driving force of approximately 1200 Newtons is required along the axial direction of the helical rod 11.

[0103] When the helix angle is 28 degrees, when a force of 1000 Newtons is applied to the helical rod 11, in order to keep the helical rod 11 stationary, a force of about 500 Newtons is required along the axial direction of the helical rod 11; while in order to drive a load of 1000 Newtons, a driving force of about 680 Newtons is required along the axial direction of the helical rod 11.

[0104] When the helix angle is 18 degrees, when a force of 1000 Newtons is applied to the helical rod 11, in order to keep the helical rod 11 stationary, the force required along the axis of the helical rod 11 is approximately 310 Newtons; while in order to drive a load of 1000 Newtons, the driving force required along the axis of the helical rod 11 is approximately 450 Newtons.

[0105] When the helix angle is 14 degrees, when a force of 1000 Newtons is applied to the helical rod 11, in order to keep the helical rod 11 stationary, the force required along the axis of the helical rod 11 is approximately 230 Newtons; while in order to drive a load of 1000 Newtons, the driving force required along the axis of the helical rod 11 is approximately 320 Newtons.

[0106] When the helix angle is 10 degrees, when a force of 1000 Newtons is applied to the helical rod 11, in order to keep the helical rod 11 stationary, a force of approximately 150 Newtons is required along the axial direction of the helical rod 11; while in order to drive a load of 1000 Newtons, a driving force of approximately 210 Newtons is required along the axial direction of the helical rod 11.

[0107] When the helix angle is 5 degrees, when a force of 1000 Newtons is applied to the helical rod 11, in order to keep the helical rod 11 stationary, the force required along the axis of the helical rod 11 is about 75 Newtons; while in order to drive a load of 1000 Newtons, the driving force required along the axis of the helical rod 11 is about 110 Newtons.

[0108] It is clear from the above experimental data that when the helix angle is smaller, a smaller power source is needed to drive the same weight of load. At the same time, a smaller power source is needed to keep the helical rod 11 from rotating relative to the sliding sleeve 12.

[0109] Therefore, this invention can significantly reduce the power requirements of the drive mechanism's power source, requiring only a smaller power motor to maintain the photovoltaic panel's orientation, thus keeping the upper surface of the photovoltaic panel facing the sun. Specifically, this is reflected in:

[0110] The weight of the photovoltaic panel is transmitted through the outer casing 16 to the screw rod 11 via the sliding sleeve 12, and then to the lead screw 14. Because an axially extending guide structure is provided between the outer casing 16 and the sliding sleeve 12, and a helical guide structure is provided between the sliding sleeve 12 and the screw rod 11, these two guide structures can distribute the weight of the photovoltaic panel, thus avoiding the direct impact of the photovoltaic panel's weight on the lead screw 14. When the photovoltaic panel stops rotating, the two guide structures can maintain the working posture of the photovoltaic panel (e.g., ...). Figure 8 (as shown in the posture), therefore, the power of the power source only needs to be enough to drive the screw rod 11 to rotate, thereby reducing the power requirements of the power source.

[0111] Similarly, when the photovoltaic panel is subjected to external forces (such as strong winds), the external forces on the photovoltaic panel need to be transmitted through the outer casing 16 to the screw rod 11 via the sliding sleeve 12, and then to the lead screw 14; therefore, the external forces will not have a direct effect on the lead screw 14.

[0112] Furthermore, since the helix angle of the spiral guide structure does not exceed 40°, especially when the helix angle is greater than 5° and less than 25°, the spiral guide structure can significantly reduce the force transmitted to the lead screw 14, that is, the force transmitted to the power source will be significantly reduced; the lead screw 14 only needs a small amount of additional power to offset the external force in order to maintain its original working posture, thereby further reducing the power requirements of the power source, that is, only a smaller power motor is needed to resist the external force.

[0113] The first embodiment of the drive mechanism is characterized by a helical guide structure between the sliding sleeve and the helical rod, and an axial guide structure between the sliding sleeve and the housing.

[0114] like Figure 6 , Figure 7 As shown, in a second embodiment of the driving mechanism of the present invention, the driving mechanism includes a straight guide rod 301-11, a lead screw 301-14 passing through the straight guide rod 301-11, and the two ends of the lead screw 301-14 being connected to the straight guide rod 301-11 via bearings 301-18; one end of the lead screw 301-14 serves as the input end of the driving mechanism and is connected to a power source; the lead screw 301-14 is rotatable relative to the straight guide rod 301-11; the straight guide rod 301-11 has a guide groove 301-1101 extending axially; a lead screw nut 301-15 is movably disposed within the guide groove 301-1101; the lead screw nut 301-15 is movably sleeved on the lead screw 301-14;

[0115] The lead screw nut 301-15 is fixedly connected to the sliding sleeve 301-12 by a set screw; the lead screw nut 301-15 has a threaded hole 301-1501 and the sliding sleeve 301-12 has a threaded hole 301-1201 for passing the set screw through.

[0116] The sliding sleeve 301-12 is movably mounted on the outer sleeve 301-16; the outer peripheral surface of the sliding sleeve 301-12 has a spiral protrusion extending spirally around its axis, and the inner wall of the through hole of the outer sleeve 301-16 has a spiral groove 301-1601 that matches the spiral protrusion; the spiral protrusion and the spiral groove 301-1601 form a spiral guide structure; through the cooperation of the spiral protrusion and the spiral groove 301-1601, the spiral guide connection between the sliding sleeve 301-12 and the outer sleeve 301-16 is realized.

[0117] The working principle of the second embodiment of the drive mechanism is as follows:

[0118] The power source drives the lead screw 301-14 to rotate, which in turn drives the lead screw nut 301-15 to translate axially within the guide groove 301-1101 of the straight guide rod 301-11. The lead screw nut 301-15 drives the sliding sleeve 301-12 to translate axially along the outer sleeve 301-16. During the translation process, the sliding sleeve 301-12, through the guidance of the spiral guide structure, drives the outer sleeve 301-16 to rotate around its own axis of rotation, thereby achieving a small-angle rotation of the outer sleeve 301-16.

[0119] The second embodiment of the drive mechanism sets a spiral guide structure between the sliding sleeve 301-12 and the outer sleeve 301-16, and sets an axial guide structure between the sliding sleeve 301-12 and the straight guide rod 301-11, which can also achieve a small-angle rotation of the outer sleeve 301-16 relative to the straight guide rod 301-11.

[0120] The working principle of the foldable tracking photovoltaic device of the present invention is as follows:

[0121] The power source drives the screw rods 11 of the first drive mechanism 300 and the second drive mechanism 400 to rotate, thereby driving the first photovoltaic panel 100 and the second photovoltaic panel 200 to rotate respectively. The number of rotations of the lead screw 14 is controlled to adjust the angle of the screw rod 11, thus controlling the angle between the surfaces of the first photovoltaic panel 100 and the second photovoltaic panel 200 and the column 600, ensuring that the upper surfaces of the first photovoltaic panel 100 and the second photovoltaic panel 200 always face the sun, thereby achieving sun tracking. Figure 8 As shown;

[0122] When encountering strong winds, the angle of the adjusting screw rod 11 is adjusted so that the first photovoltaic panel 100 and the second photovoltaic panel 200 rotate to their lowest point, that is, the surfaces of the first photovoltaic panel 100 and the second photovoltaic panel 200 are close to and in contact with the column 600, in order to reduce the wind-exposed area of ​​the photovoltaic panels, thereby realizing the folding and collapsing of the photovoltaic panels. Figure 9 As shown.

[0123] In this embodiment, the first drive mechanism 300 and the second drive mechanism 400 can share the same power source or use their own power sources respectively.

[0124] In this embodiment, the outer casing 16 of the drive mechanism is fixedly connected to the fixed bracket 500, while the screw rod 11 is fixedly connected to the photovoltaic panel. That is, the outer casing 16 acts as a fixed component, and the screw rod 11 acts as a rotating component, with the photovoltaic panel rotating through the screw rod 11. Alternatively, the two ends of the screw rod 11 can be fixedly connected to the fixed bracket 500 via a connector, while the outer casing 16 remains unconnected to the fixed bracket 500 and is in a free state. In this case, the screw rod 11 acts as a fixed component, and the outer casing 16 acts as a rotating component. Rotating the outer casing 16 relative to the screw rod 11 will also drive the first photovoltaic panel 100, which is fixedly connected to the outer casing 16, to rotate.

[0125] As a second embodiment of the tracking photovoltaic device with folding function of the present invention, the two ends 1101 of the spiral rod 11 of the first drive mechanism 300 are fixedly connected to the fixed bracket 500 through connectors to keep the spiral rod 11 stationary; the lower part of the outer shell 16 of the first drive mechanism 300 is fixedly connected to one end of the lower support member 501, and the other end of the lower support member 501 is fixedly connected to the upper surface of the first photovoltaic panel 100; the upper part of the outer shell 16 is fixedly connected to one end of the upper support member 502, and the other end of the upper support member 502 is fixedly connected to the lower surface of the first photovoltaic panel 100; the upper support member 502 and one end of the lower support member 501 form a transmission mechanism fixing cover, which fixes the middle part of the outer shell 16 inside; when the outer shell 16 of the first drive mechanism 300 rotates relative to the stationary spiral rod 11, it can drive the first photovoltaic panel 100 to rotate around the rotation axis of the first drive mechanism 300 through the transmission mechanism fixing cover.

[0126] The working principle of the second embodiment is as follows:

[0127] When the power source (such as a motor) drives the lead screw 14 to rotate, it drives the lead screw nut 15 and the sliding sleeve 12 to translate along the axial direction of the helical rod 11. Due to the guiding effect of the helical groove 1202 and the helical protrusion 1102, the sliding sleeve 12 can rotate relative to the helical rod 11 during the translation process. Since the helical rod 11 is fixed, the sliding sleeve 12 can rotate during the translation process and drive the outer shell 16 to rotate, thereby realizing the small-angle rotation of the outer shell 16 relative to the helical rod 11.

[0128] Since the outer casing 16 is fixedly connected to the first photovoltaic panel 100 through the lower support member 501 and / or the upper support member 502, when the power source drives the outer casing 16 to rotate relative to the screw rod 11, it can drive the first photovoltaic panel 100 to rotate around the rotation axis of the first drive mechanism 300.

[0129] The photovoltaic device of the present invention has both tracking and folding functions, so the photovoltaic device of the present invention can be installed not only in the wild wasteland, but also in urban areas and agricultural land without changing the nature of land use.

[0130] Specifically, when the photovoltaic device of the present invention is installed on farmland, the tracking angle of the photovoltaic panel is adjusted according to the light intensity required for planting vegetation on the farmland in order to control the light exposure time of the vegetation.

[0131] Therefore, this invention can solve the problem of limited installation sites for existing photovoltaic equipment, expanding the installation scope of existing photovoltaic equipment from being limited to wild wastelands to being able to be installed on all lands without affecting the original agricultural planting function of the land. This is of great significance to the farmland protection policy of safeguarding the 1.8 billion mu of arable land.

[0132] On the other hand, when installed on agricultural land, this invention not only converts solar energy into electricity for utilization but also improves agricultural economics. Specifically, when the photovoltaic panels are folded up, they provide ample sunlight to the plants; when unfolded, they generate electricity. For shade-loving crops, the unfolded photovoltaic panels also provide shade, protecting the plants, reducing water evaporation, optimizing the crop growth environment, and increasing agricultural yield.

[0133] When solar tracking is not required at night, keeping the solar panels flush with the pole minimizes damage to the pole and other components caused by the panels unfolding. It also reduces lifting forces and pressure on the support frame and base, making the equipment more reliable.

[0134] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A tracking photovoltaic bracket with a folding function, characterized in that, The device includes a fixed bracket and two sets of drive mechanisms. The first drive mechanism is fixedly connected to one side of the fixed bracket, and the second drive mechanism is fixedly connected to the other side of the fixed bracket. Each drive mechanism has a fixing component and a rotating component, which can rotate relative to each other. The fixing component is fixedly connected to the fixed bracket, and the rotating component is used to fixally connect to the photovoltaic panel. The driving mechanism further includes an intermediate component, which is movably connected to the rotating component, and the intermediate component and the rotating component are guided by a first guide structure; the intermediate component is movably connected to the fixed component, and the intermediate component and the fixed component are guided by a second guide structure.

2. The dual-axis tracking photovoltaic bracket with folding function according to claim 1, characterized in that, The fixing component is a shell, and the rotating component is a screw rod; or, the fixing component is a screw rod, and the rotating component is a shell; the intermediate component is a sliding sleeve.

3. The dual-axis tracking photovoltaic bracket with folding function according to claim 1, characterized in that, The first guide structure is a spiral guide structure; the second guide structure is an axial guide structure; or, the first guide structure is an axial guide structure; and the second guide structure is a spiral guide structure.

4. The tracking photovoltaic bracket with folding function according to claim 2, characterized in that, The drive mechanism also includes: The driven member is fixedly connected to the sliding sleeve; and The driving component is connected to the power source; driven by the power source, the driving component drives the driven component, which can drive the sliding sleeve to make linear motion along the axial direction of the screw rod.

5. The tracking photovoltaic bracket with folding function according to claim 3, characterized in that, The helix angle of the spiral guide structure does not exceed 40°.

6. The tracking photovoltaic bracket with folding function according to claim 3, characterized in that, The helix angle of the spiral guide structure is greater than 5° and less than 25°.

7. The tracking photovoltaic bracket with folding function according to claim 4, characterized in that, The driving component is a lead screw, and the driven component is a lead screw nut. The rotation of the lead screw drives the lead screw nut and the sliding sleeve to translate along the axial direction of the screw, causing relative rotation between the screw and the sliding sleeve, thereby realizing relative rotation between the screw and the outer shell.

8. The tracking photovoltaic bracket with folding function according to claim 2, characterized in that, The sliding sleeve has a through hole, and the sliding sleeve is sleeved on the spiral rod through the through hole; the spiral guide structure is a spiral groove provided on the inner wall of the through hole and a spiral protrusion provided on the outer circumferential surface of the spiral rod. Alternatively, the spiral guide structure may be a spiral protrusion provided on the inner wall of the through hole and a spiral groove provided on the outer circumferential surface of the spiral rod; Alternatively, the spiral guide structure may consist of a first spiral groove disposed on the inner wall of the through hole, a second spiral groove disposed on the outer circumferential surface of the spiral rod, and a plurality of balls disposed between the first spiral groove and the second spiral groove.

9. The tracking photovoltaic bracket with folding function according to claim 2, characterized in that, The outer peripheral surface of the sliding sleeve is formed with a first axial guide structure extending along the axial direction, and the outer shell is provided with a second axial guide structure adapted to the first axial guide structure; the first axial guide structure and the second axial guide structure constitute the axial guide structure between the sliding sleeve and the outer shell.

10. The tracking photovoltaic bracket with folding function according to claim 9, characterized in that, The first axial guide structure is a guide protrusion, and the second axial guide structure is a guide groove; Alternatively, the first axial guide structure is a guide groove, and the second axial guide structure is a guide protrusion; Alternatively, it may also include an intermediate component of an axial guide structure, wherein both the first and second axial guide structures are guide grooves, and the intermediate component of the axial guide structure is disposed between the first and second axial guide structures, thereby forming a guiding fit.

11. The tracking photovoltaic bracket with folding function according to claim 1, characterized in that, The rotation axis of the first drive mechanism is parallel to the rotation axis of the second drive mechanism.

12. A photovoltaic panel, characterized in that: It includes a mounting part for forming a fixed connection with the outside, the mounting part being located at one end of the photovoltaic panel.

13. The photovoltaic panel according to claim 12, characterized in that, The photovoltaic panel has reinforcing ribs; the reinforcing ribs extend from the mounting portion toward the other end of the photovoltaic panel.

14. A tracking photovoltaic device with a folding function, characterized in that, The system includes a tracking photovoltaic bracket with a folding function as described in any one of claims 1 to 11 and a photovoltaic panel as described in any one of claims 12 to 13, wherein the mounting portion of the photovoltaic panel is connected to the rotating component of the driving mechanism; the first driving mechanism of the tracking photovoltaic bracket is connected to the side of the first photovoltaic panel, and the first driving mechanism can drive the first photovoltaic panel to rotate around its rotation axis; the second driving mechanism is connected to the side of the second photovoltaic panel, and the second driving mechanism can drive the second photovoltaic panel to rotate around its rotation axis; so that the rotation axes of the first photovoltaic panel and the second photovoltaic panel are respectively located on both sides of the upright.

15. The tracking photovoltaic device with folding function according to claim 14, characterized in that, The fixed component of the drive mechanism is a housing, and the rotating component is a screw rod; the housing of the drive mechanism is fixedly connected to the fixed bracket; the housing is movably connected to one end of the upper support and the lower support, and the other end of the upper support and the lower support is fixedly connected to the photovoltaic panel; The first output end of the screw rod of the drive mechanism is fixedly connected to one end of the first connecting arm, and the other end of the first connecting arm is fixedly connected to the lower support and / or the upper support; the second output end of the screw rod of the drive mechanism is fixedly connected to one end of the second connecting arm, and the other end of the second connecting arm is fixedly connected to the lower support and / or the upper support.

16. The tracking photovoltaic device with folding function according to claim 14, characterized in that, The fixed component of the drive mechanism is a screw rod, and the rotating component is a housing; the two ends of the screw rod of the drive mechanism are respectively fixedly connected to the fixed bracket through connecting parts; The outer shell of the drive mechanism is fixedly connected to one end of the upper support and the lower support, and the other end of the upper support and the lower support is fixedly connected to the photovoltaic panel.

Images