Photovoltaic panel frame walking mechanism and folding mobile photovoltaic device

Abstract

This invention discloses a photovoltaic (PV) panel frame traveling mechanism and a foldable mobile PV device. The PV panel frame traveling mechanism includes a connector 800 and a traveling unit. The connector 800 is connected to the PV panel frame, and the traveling unit is rotatably connected to the connector 800. The traveling unit includes a traveling sprocket and a pulley assembly. The traveling sprocket engages with a chain to receive driving force and transmit it to the PV panel frame. The pulley assembly rolls with a guide rail to support and guide the PV panel frame along the guide rail. The traveling sprocket and pulley assembly are rotatably connected and positioned relative to the same central axis, effectively ensuring coaxiality between them and reducing the risk of misalignment. Furthermore, the traveling mechanism operates in a dual-axis configuration with the PV panel frame's top rotation axis, providing greater tolerance for PV panel frame deformation and manufacturing errors, ensuring long-term operational reliability. In addition, the pulley assembly and traveling unit are designed on the same track, resulting in fewer parts and a lower error rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic technology, in particular to a photovoltaic panel frame walking mechanism and a folding mobile photovoltaic device with the same. BACKGROUND

[0002] The folding mobile photovoltaic panel device is an integrated and modular photovoltaic power generation unit. The photovoltaic panel, support structure, unfolding and storage mechanism, etc. are usually integrated in a container for convenient transportation and rapid deployment. The photovoltaic panel assembly can be folded in the box to achieve compact transportation, and can be unfolded along the preset guide rail to form a power generation array after reaching the site. To achieve smooth unfolding and reliable locking of the photovoltaic panel, a walking sprocket and a guide wheel set are usually arranged at the bottom of the photovoltaic panel frame. The walking sprocket is used to engage with the driving chain to convert the driving force transmitted by the external motor through the chain into the traction force of the photovoltaic panel frame moving along the guide rail. The guide wheel set is used to roll with the guide rail to guide the photovoltaic panel frame to move linearly in a predetermined direction, preventing it from deviating or overturning during movement.

[0003] However, in the prior art, the walking sprocket is usually fixedly installed with the photovoltaic panel frame, and the walking sprocket and the guide wheel set are independently installed on the photovoltaic panel frame. Not only does the dispersion of components increase the number of parts, but also the positioning, alignment and fastening of the walking sprocket and the guide wheel set need to be performed separately, which requires multiple adjustments of the position, repeated measurement of the coaxiality and parallelism, and increases the complexity of on-site assembly and the difficulty of debugging. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a photovoltaic panel frame walking mechanism, which has the advantages of high transmission reliability, compact structure, convenient assembly, strong tolerance capacity and low maintenance cost.

[0005] The present application also provides a folding mobile photovoltaic device with the above photovoltaic panel frame walking mechanism.

[0006] According to the photovoltaic panel frame walking mechanism of the present application, the photovoltaic panel frame walking mechanism comprises: a connecting piece connected to the photovoltaic panel frame; a walking unit rotatably connected to the connecting piece, the walking unit comprising a walking sprocket and a pulley assembly, the pulley assembly being used to roll with the guide rail, and the walking sprocket being used to engage with the chain to drive the photovoltaic panel frame to move along the guide rail; wherein the walking sprocket and the pulley assembly are rotatably connected and arranged relative to the same center axis.

[0007] The photovoltaic panel frame walking mechanism according to the present invention has at least the following beneficial effects: the walking sprocket receives driving force and drives the walking unit, thereby moving the photovoltaic panel frame along the guide rail. Integrating the walking sprocket and pulley assembly together allows them to share the same track, significantly reducing the number of parts compared to traditional split structures, thus lowering raw material and machining costs, simplifying on-site assembly procedures, shortening deployment time, and reducing manual assembly costs. Simultaneously, by rotatably connecting the walking sprocket and pulley assembly and setting them relative to the same central axis, the coaxiality between the toothed plate and the pulley assembly can be effectively ensured, reducing the risk of tooth misalignment. The traveling sprocket can rotate relative to the pulley assembly. When the photovoltaic panel frame undergoes slight deformation due to manufacturing tolerances, welding deformation, or long-term outdoor service, the traveling sprocket shaft system, originally fixed to the frame, will shift in position. The traveling sprocket in this invention, coaxial with and rotatably connected to the pulley assembly, can automatically generate an adaptive rotation angle relative to the pulley assembly around the same central axis. This actively compensates for the angular deviation between the sprocket axis and the chain's running direction caused by frame deformation, ensuring the traveling sprocket and chain always maintain an ideal meshing state of parallel alignment and uniform tooth contact. This avoids transmission failures such as misalignment, uneven wear, and jamming. Furthermore, when the traveling mechanism is mounted at the bottom of the photovoltaic panel frame, it forms a dual-axis operation with the hinged rotating shaft at the top of the frame, further enhancing the overall mechanism's ability to absorb geometric errors in the frame.

[0008] According to some embodiments of the photovoltaic panel frame walking mechanism of the present invention, the pulley assembly includes at least one rotating wheel, the rotating wheel includes a central rotating part and limiting flanges located on both sides of the rotating part, and the limiting flanges on both sides together with the rotating wheel form an H-shaped cross-sectional structure.

[0009] According to some embodiments of the present invention, the photovoltaic panel frame walking mechanism includes a fixed plate, the walking sprocket and the fixed plate are respectively disposed on opposite sides of the pulley assembly, the walking sprocket and / or the fixed plate are provided with a bearing assembly, the pulley assembly is in contact with the first rolling surface of the guide rail, and the bearing assembly is in contact with the second rolling surface of the guide rail.

[0010] According to some embodiments of the photovoltaic panel frame walking mechanism of the present invention, the bearing assembly includes a first bearing group and a second bearing group, the first bearing group being connected to the fixed plate, and the second bearing group being connected to the walking sprocket.

[0011] According to some embodiments of the photovoltaic panel frame walking mechanism of the present invention, both the first bearing group and the second bearing group include at least two rolling bearings, and the two rolling bearings are spaced apart along the extension direction of the guide rail.

[0012] According to some embodiments of the photovoltaic panel frame traveling mechanism of the present invention, the bearing assembly includes a lubrication structure for lubricating the rolling bearing.

[0013] According to some embodiments of the photovoltaic panel frame traveling mechanism of the present invention, the rolling bearing is a full complement needle roller bearing.

[0014] The foldable mobile photovoltaic device according to the present invention includes the photovoltaic panel frame walking mechanism of the present invention, and also includes a base frame, a photovoltaic panel assembly and a retraction and extension transmission assembly. The photovoltaic panel assembly is connected to the photovoltaic panel frame walking mechanism. The photovoltaic panel assembly has an unfolded state and a folded state. The photovoltaic panel assembly includes multiple photovoltaic panel components. A guide rail assembly is disposed on the base frame, the guide rail assembly extends along the unfolding direction of the photovoltaic panel assembly and is connected to the photovoltaic panel frame traveling mechanism; The retraction and extension transmission assembly includes a chain drive component and a drive component. The chain drive component is detachably connected to the base frame and is arranged side by side with the guide rail assembly. The chain drive component includes a chain adapted to engage with the travel sprocket. The drive component is used to drive the chain to guide the photovoltaic panel component to switch between the unfolded state and the folded state.

[0015] The foldable mobile photovoltaic device according to the present invention has at least the following advantages: The photovoltaic panel frame traveling mechanism is applied to the bottom of the photovoltaic panel assembly, which consists of multiple photovoltaic panel components. These components are mounted on a base frame via a guide rail assembly and are equipped with a retraction / expansion transmission assembly to switch between unfolded and folded states. The retraction / expansion transmission assembly includes a chain drive component and a drive component. The chain drive component is detachably connected to the base frame and arranged side-by-side with the guide rail assembly, its chain meshing with a traveling sprocket. The traveling sprocket can automatically adjust the meshing angle, always maintaining good cooperation with the chain, avoiding the chain disengagement or skipping of teeth in traditional structures. The H-shaped cross-section structure of the pulley assembly and its rolling cooperation with the guide rail have extremely strong tolerance capabilities. The adaptive contact between the limiting flanges on both sides and the sides of the guide rail maintains the correct traveling direction, preventing the photovoltaic panel assembly from deviating or jamming. The foldable mobile photovoltaic device can be quickly deployed in various complex terrains, significantly expanding its application scenarios.

[0016] According to some embodiments of the present invention, the foldable mobile photovoltaic device includes a photovoltaic panel assembly comprising a plurality of first rotating shafts and a plurality of second rotating shafts, wherein the pulley assembly and the walking sprocket are disposed on the first rotating shafts; Wherein, two adjacent photovoltaic panel components are rotatably connected by a second rotating shaft; At least one end of each of the photovoltaic panel components is also rotatably connected to an adjacent photovoltaic panel component or the guide rail assembly via a first rotating shaft.

[0017] According to some embodiments of the foldable mobile photovoltaic device of the present invention, the photovoltaic panel assembly further includes an unfolding limiting member, which is used to limit the maximum included angle between adjacent photovoltaic panel components so as to keep the adjacent photovoltaic panel components in the unfolded state.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the photovoltaic panel frame walking mechanism according to an embodiment of the present invention; Figure 2 for Figure 1 An exploded view of the walking mechanism is shown. Figure 3 for Figure 1 An exploded view of the fixing plate is shown; Figure 4 for Figure 1 An exploded view of the traveling sprocket is shown. Figure 5 This is a schematic diagram of the structure of the foldable mobile photovoltaic device according to an embodiment of the present invention; Figure 6 for Figure 5 The diagram shows the structure of the walking unit; Figure 7 This is an exploded view of the photovoltaic panel assembly of the foldable mobile photovoltaic device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the unfolding limiting component of the foldable mobile photovoltaic device according to an embodiment of the present invention; Figure 9 This is another structural schematic diagram of the unfolding limiting component of the foldable mobile photovoltaic device according to an embodiment of the present invention.

[0020] Explanation of icon numbers: Walking unit 100; walking sprocket 110; pulley assembly 120; rotating wheel 121; rotating part 1211; limiting flange 1212; fixing plate 130; bearing assembly 140; rolling bearing 141; straight oil cup 142; positioning sleeve 143; second fastener 145; Guide rail 200; First rolling surface 210; Second rolling surface 220; Frame 300; Photovoltaic panel module 400; Photovoltaic panel component 410; Guide rail assembly 500; The transmission assembly 600; the chain drive component 610; the chain 611; the drive component 620; the first rotating shaft 630; and the second rotating shaft 640. Deployment limiting component 700; first limiting block 710; second limiting block 720; third limiting block 730; fourth limiting block 740; Connector 800. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] A foldable mobile photovoltaic (PV) panel unit is an integrated, modular PV power generation unit. It typically integrates PV panels, supporting structures, and unfolding and folding mechanisms within a container for easy transport and rapid deployment. The PV panel modules can be folded into the container for compact transport and, upon arrival at the site, unfold along pre-set guide rails to form a power generation array. To ensure smooth unfolding and reliable locking of the PV panels, a sprocket and guide wheel assembly are usually installed at the bottom of the PV panel frame. The sprocket engages with the drive chain, converting the driving force transmitted from the external motor via the chain into traction force for the PV panel frame to move along the guide rails. The guide wheel assembly rolls with the guide rails, guiding the PV panel frame to move linearly in a predetermined direction, preventing it from shifting or tipping over during movement.

[0027] However, in existing technologies, the traveling sprocket is usually fixedly installed with the photovoltaic panel frame, while the traveling sprocket and guide wheel assembly are installed independently on the photovoltaic panel frame. In actual installation and long-term operation, it is difficult to ensure the coaxiality of the traveling sprocket and guide wheel assembly. Even slight misalignment can easily lead to poor meshing between the chain and sprocket, resulting in abnormal wear, noise, or even jamming, severely affecting transmission reliability. Secondly, the dispersed components increase the number of parts, which not only increases manufacturing costs but also adds complexity and difficulty to on-site assembly and debugging.

[0028] Therefore, such as Figures 1 to 4As shown, the photovoltaic panel frame traveling mechanism proposed in this invention includes a connector 800 and a traveling unit 100. The connector 800 is fixedly connected to the photovoltaic panel frame, and the traveling unit 100 is rotatably connected to the connector 800. The traveling unit 100 includes a traveling sprocket 110 and a pulley assembly 120, which are rotatably connected and arranged relative to the same central axis. The traveling sprocket 110 engages with a chain 611 to receive driving force and transmits the driving force to the photovoltaic panel frame; the pulley assembly 120 rolls with a guide rail 200 to support and guide the photovoltaic panel frame to move along the guide rail 200. By rotatably connecting the traveling sprocket 110 and the pulley assembly 120 around the same axis, when the photovoltaic panel frame undergoes slight deformation due to manufacturing tolerances, welding deformation, or long-term outdoor service, the axis of the traveling sprocket 110, which is originally fixed to the panel frame, will shift in position. In this embodiment, the traveling sprocket 110, which is coaxial and rotatably connected to the pulley assembly 120, can automatically generate an adaptive rotation angle relative to the pulley assembly 120 around the central axis, actively compensating for angular deviations. This ensures that the traveling sprocket 110 and the chain 611 always maintain an ideal meshing state of parallel alignment and uniform tooth contact. This avoids transmission failures such as misalignment, uneven wear, and jamming caused by poor coaxiality in traditional split installations, improving transmission reliability and service life. At the same time, since the traveling sprocket 110 and the pulley assembly 120 share the same track and are integrated into one unit, the number of parts is significantly reduced, lowering raw material and machining costs. During on-site assembly, there is no need to repeatedly adjust the axis alignment, simplifying the process, shortening deployment time, and effectively reducing labor assembly costs.

[0029] In related background technologies, to limit the lateral displacement of the plate frame, guide wheels often adopt a V-shaped flange contacting the side of the track. This type of fit has a small tolerance clearance and is extremely sensitive to track installation accuracy and plate frame deformation. Under wind loads or foundation settlement, it is prone to derailment or accelerated wear. Furthermore, lubrication and maintenance of such critical moving parts are often inconvenient, and long-term operation in harsh outdoor environments can easily lead to premature damage due to lubrication failure.

[0030] Therefore, in some embodiments of the present invention, such as Figure 1 and Figure 2As shown, the pulley assembly 120 includes at least one rotating wheel 121. The rotating wheel 121 has a central rotating portion 1211 and limiting flanges 1212 located on both sides of the rotating portion 1211. The limiting flanges 1212 on both sides together with the rotating wheel 121 form an H-shaped cross-section structure. When the H-shaped rotating wheel 121 rolls with the guide rail 200, the cylindrical surface of the rotating portion 1211 contacts the upper surface of the guide rail 200 to bear the load. The limiting flanges 1212 on both sides are located near the two side surfaces of the guide rail 200, respectively, and play a role in horizontal guidance and preventing derailment. Since an appropriate gap is reserved between the limiting flanges 1212 and the side surfaces of the guide rail 200, it can effectively limit the lateral displacement of the photovoltaic panel frame during movement, and will not cause jamming due to over-positioning. Even if there is a certain straightness error in the installation of the guide rail 200 or a slight deformation of the photovoltaic panel frame, the H-shaped pulley assembly 120 can still maintain smooth rolling by adaptively adjusting the contact position. Compared to the traditional V-shaped wheel flange that is in close contact with the side of the track, the H-shaped pulley assembly 120 of this embodiment has a larger tolerance clearance, significantly reducing its sensitivity to track installation accuracy and plate deformation. It can still operate reliably under harsh conditions such as wind load, foundation settlement, or temperature changes, effectively preventing the risk of derailment. Furthermore, the wheel flange and the side of the guide rail 200 are in a non-contact or micro-contact state, which greatly reduces wear and extends the maintenance cycle.

[0031] In some embodiments of the present invention, such as Figures 1 to 3As shown, the traveling unit 100 also includes a fixed plate 130. The traveling sprocket 110 and the fixed plate 130 are respectively disposed on opposite sides of the pulley assembly 120. A bearing assembly 140 is disposed on the traveling sprocket 110 and / or the fixed plate 130. The pulley assembly 120 contacts the first rolling surface 210 of the guide rail 200, and the bearing assembly 140 contacts the second rolling surface 220 of the guide rail 200. The pulley assembly 120 bears the main vertical load and travels along the first rolling surface 210, while the bearing assembly 140 abuts against the second rolling surface 220, providing additional support and guidance. The first rolling surface 210 and the second rolling surface 220 can be different parts of the guide rail 200, for example, the first rolling surface 210 is the top surface of the guide rail 200, and the second rolling surface 220 is the side or bottom surface of the guide rail 200. Through the contact of the two rolling surfaces, the traveling mechanism has more sufficient constraint freedom on the guide rail 200, and the photovoltaic panel frame will not exhibit unstable postures such as tilting, lowering, or leaning during movement. Meanwhile, the bearing assembly 140 also provides additional radial support to the traveling sprocket 110 when it transmits driving force during rotation, reducing the bending moment and vibration caused by the cantilever mounting of the traveling sprocket 110, and further improving the smoothness of transmission. It is understood that the guide rail 200 includes an I-beam and a sliding rail disposed on top of the I-beam, with the top surface of the sliding roller being the first rolling surface 210, and the rolling roller contacting the sliding rail. The lower end surface of the upper flange of the I-beam is the second rolling surface 220, and the bearing assembly 140 contacts the lower end surface of the upper flange of the I-beam.

[0032] In some embodiments of the present invention, such as Figures 1 to 4 As shown, the pulley assembly 120 also includes bolts, bushings, and a first fastener. The connector 800 has a connecting hole, and the bolt passes sequentially through the traveling sprocket 110, the connector 800, the rolling wheel, and the fixing plate 130. The bushing is fitted into the connecting hole, and the shank of the bolt passes through the traveling sprocket 110 and enters the bushing, then passes through the central hole of the rotating wheel 121 and the hole on the fixing plate 130. Finally, the first fastener connects and clamps the above components together.

[0033] In some embodiments of the present invention, such as Figure 3 and Figure 4As shown, the bearing assembly 140 also includes a second fastener 145, a positioning sleeve 143, and a rolling bearing 141. The rolling bearing 141 is axially positioned by the positioning sleeve 143 and locked to the fixed plate 130 or the traveling sprocket 110 by the second fastener 145. The positioning sleeve 143 is sleeved between the inner ring of the rolling bearing 141 and the mounting shaft, or embedded between the bearing mounting hole and the outer ring of the rolling bearing 141. Its axial length precisely limits the axial displacement range of the rolling bearing 141, ensuring that the bearing assembly 140 always maintains the preset installation position during long-term reciprocating operation and avoiding axial movement of the bearing due to vibration or temperature differences. The second fastener 145 can be in the form of a lock nut, pressure plate, or end cap, etc., to press the positioning sleeve 143 and the rolling bearing 141 together into the bearing seat hole of the fixed plate 130 or the traveling sprocket 110, forming a rigid connection. This modular installation method makes the replacement and maintenance of the rolling bearing 141 more convenient: when the bearing reaches the end of its service life, only the second fastener 145 needs to be removed, the positioning sleeve 143 and the old bearing need to be taken out, and a new bearing can be installed and relocked without disassembling the entire walking unit 100, significantly reducing maintenance downtime. At the same time, the positioning sleeve 143 can be selected or repaired according to the fit tolerance between the bearing and the mounting seat, effectively compensating for manufacturing errors of the parts, ensuring that the rolling bearing 141 obtains a suitable working clearance, neither too tight to cause overheating and jamming, nor too loose to cause impact noise. Through the synergistic effect of the positioning sleeve 143 and the second fastener 145, the axial positioning accuracy and connection reliability of the bearing assembly 140 are doubly guaranteed, further improving the operational stability and durability of the walking mechanism under harsh outdoor conditions.

[0034] In some embodiments of the present invention, such as Figures 1 to 4 As shown, the bearing assembly 140 further includes a first bearing group and a second bearing group. The first bearing group is connected to the fixed plate 130, and the second bearing group is connected to the traveling sprocket 110. Both the first and second bearing groups include at least two rolling bearings 141; that is, the first bearing group includes two rolling bearings 141, and the second bearing group also includes two rolling bearings 141. These two rolling bearings 141 are spaced apart along the extension direction of the guide rail 200. The spaced arrangement can effectively increase the support span, making the force on the traveling mechanism more uniform when running on the guide rail 200, and avoiding the phenomenon of uneven load caused by single-point bearing. The guide rail 200 system, suitable for long-distance outdoor installation, can absorb the small height difference or misalignment that exists during the installation of the guide rail 200, ensuring good stability of the traveling mechanism throughout its entire stroke range.

[0035] In some embodiments of the present invention, such as Figure 3 and Figure 4As shown, the bearing assembly 140 is also equipped with a lubrication structure for lubricating the rolling bearing 141. Specifically, the lubrication structure can be a straight-through oil cup 142, installed on the second fastener 145. The straight-through oil cup 142 is directly installed in the oil cup mounting hole pre-set on the end face or side of the second fastener 145 via a threaded connection. The oil outlet of the oil cup is connected to the lubrication oil passage opened inside the second fastener 145, and the lubrication oil passage extends further to the area where the rollers and raceways of the rolling bearing 141 are located. When grease needs to be added, maintenance personnel do not need to disassemble any parts of the traveling unit 100. They only need to use a manual grease gun or an automatic lubrication pump to press grease into the oil cup 142 on-site. The grease is then delivered directionally and quantitatively to the working surface of the rolling bearing 141 along the oil passage of the second fastener 145, achieving immediate lubrication of the rollers, cage, and raceways.

[0036] In some embodiments of the present invention, the rolling bearing 141 is a full complement needle roller bearing. Because full complement needle roller bearings lack a cage, they have a greater number of needles and thus a higher radial load capacity within the same overall dimensions, making them particularly suitable for installations where photovoltaic panel frames are heavy and space is limited. When supporting the photovoltaic panel module 400, the photovoltaic panel frame traveling mechanism must withstand vertical gravity and additional bending moments generated by the traction of the chain 611. Full complement needle roller bearings can provide sufficient rated dynamic and static loads in a compact size, resisting impacts and vibrations and preventing premature bearing fatigue failure. Simultaneously, the frictional resistance of full complement needle roller bearings is relatively low. Combined with regular maintenance of the lubrication structure, the overall operation of the traveling mechanism is smooth, reducing the power required by the drive motor and helping to reduce energy consumption.

[0037] A foldable mobile photovoltaic device according to an embodiment of the present invention includes a photovoltaic panel frame traveling mechanism according to an embodiment of the present invention. It includes: a base frame 300, a photovoltaic panel assembly 400, a guide rail assembly 500, and a retraction / expansion transmission assembly 600. The photovoltaic panel assembly 400 is connected to the photovoltaic panel frame traveling mechanism and has an unfolded state and a folded state. The photovoltaic panel assembly 400 is composed of multiple photovoltaic panel members 410. The guide rail assembly 500 is disposed on the base frame 300, extends along the unfolding direction of the photovoltaic panel assembly 400, and is connected to the photovoltaic panel frame traveling mechanism. The retraction / expansion transmission assembly 600 includes a chain drive member 610 and a drive member 620. The chain drive member 610 is detachably connected to the base frame 300 and is arranged side-by-side with the guide rail assembly 500. The chain drive member 610 includes a chain 611 adapted to engage with a traveling sprocket 110. The drive member 620 drives the chain 611 to guide the photovoltaic panel members 410 to switch between the unfolded state and the folded state. The entire device can be transported in a container. During transportation, the photovoltaic panel module 400 is folded and stored inside the container. After arriving at the site, the photovoltaic panel module 400 is smoothly pushed out along the guide rail 200 and unfolded into a power generation array by the drive mechanism of the retraction and extension transmission component 600.

[0038] According to an embodiment of the foldable mobile photovoltaic device of the present invention, by employing the photovoltaic panel frame walking mechanism of the present invention, the photovoltaic panel frame walking mechanism is applied to the bottom of the photovoltaic panel assembly 400. Since the walking sprocket 110 and the pulley assembly 120 are coaxially rotatably connected, even if the photovoltaic panel assembly 400 undergoes slight posture changes during unfolding due to uneven gravity distribution or local unevenness of the guide rail 200, the walking sprocket 110 can automatically adjust the meshing angle and always maintain good cooperation with the chain 611, avoiding the phenomenon of chain 611 disengaging or skipping teeth due to deformation of the panel frame in traditional structures. At the same time, the H-shaped cross-section structure of the pulley assembly 120 and the rolling cooperation with the guide rail 200 have extremely strong tolerance. Even if the guide rail 200 tilts or bends to a certain extent due to foundation settlement, the pulley assembly 120 can still maintain the correct direction of travel through the adaptive contact between the two side limiting flanges 1212 and the sides of the guide rail 200, preventing the photovoltaic panel assembly 400 from deviating or jamming. This highly reliable walking mechanism enables the foldable mobile photovoltaic device to be quickly deployed in various complex terrains without the need for high-precision preprocessing of the ground, greatly expanding its application scenarios.

[0039] In some embodiments of the present invention, such as Figures 5 to 9 As shown, the photovoltaic panel assembly 400 includes multiple first rotating shafts 630 and multiple second rotating shafts 640. A pulley assembly 120 and a traveling sprocket 110 are disposed on the first rotating shafts 630. Two adjacent photovoltaic panel components 410 are rotatably connected via a second rotating shaft 640. At least one end of each photovoltaic panel component 410 is also rotatably connected to an adjacent photovoltaic panel component 410 or a guide rail assembly 500 via a first rotating shaft 630. The first rotating shaft 630 serves both as the mounting shaft of the traveling mechanism and as the hinge shaft between the photovoltaic panel components 410, thus integrating driving and folding functions. When the retraction transmission assembly 600 drives the traveling sprocket 110, the traveling sprocket 110 drives the first rotating shaft 630 to rotate, thereby pushing the photovoltaic panel component 410 to move along the guide rail 200. Simultaneously, the second rotating shafts 640 allow adjacent photovoltaic panel components 410 to rotate relative to each other, allowing the entire photovoltaic panel assembly 400 to unfold or fold up section by section like a folding screen. When unfolded, the photovoltaic panel module 400 allows each photovoltaic panel component 410 to be laid out flat or tilted, maximizing the light-receiving area. When folded, the photovoltaic panel components 410 are tightly stacked, greatly reducing the transportation volume. The integrated layout of the traveling mechanism and the rotating shaft also reduces the number of additional connectors 800, resulting in a simple and compact structure and significantly improved assembly efficiency.

[0040] In some embodiments of the present invention, such as Figures 5 to 9As shown, the photovoltaic panel assembly 400 also includes an unfolding limiting member 700. The unfolding limiting member 700 limits the maximum angle between adjacent photovoltaic panel components 410, ensuring that the adjacent photovoltaic panel components 410 remain in the unfolded state. The unfolding limiting member 700 can be a first limiting block 710 and a second limiting block 720 positioned relative to each other on the adjacent photovoltaic panel components 410. When the photovoltaic panel component 410 rotates around the second rotation axis 640 to a predetermined angle, the first limiting block 710 and the second limiting block 720 abut against each other, preventing further rotation and thus locking the photovoltaic panel component 410 in a horizontal or slightly tilted power generation posture. Furthermore, the unfolding limiting member 700 can also be combined with an elastic buffer element to absorb some of the impact energy at the moment of contact, preventing structural damage caused by rigid collisions.

[0041] The unfolding limiting member 700 also includes a third limiting block 730 and a fourth limiting block 740, which are disposed on the first rotation axis 630. Both the third limiting block 730 and the fourth limiting block 740 have inclined surfaces. When the photovoltaic panel component 410 rotates around the first rotation axis 630 to a predetermined angle, the third limiting block 730 and the fourth limiting block 740 abut against each other, preventing further rotation and thus locking the photovoltaic panel component 410 in a horizontal or slightly inclined power generation posture. In some other embodiments, the unfolding limiting member 700 may also be a limiting rod or other limiting structure.

[0042] Understandably, the details of the traveling mechanism can be modified in various ways according to actual needs. For example, the number of rotating wheels 121 in the pulley assembly 120 can be adjusted according to the weight of the photovoltaic panel frame and the width of the guide rail 200. For ultra-long or ultra-heavy photovoltaic panel components 410, two or more rotating wheels 121 can be installed side by side to share the load. At this time, each rotating wheel 121 still maintains the same central axis as the traveling sprocket 110 and is axially positioned through bushings or spacers to ensure synchronous rolling. The rotating connection between the traveling sprocket 110 and the pulley assembly 120 can use rolling bearings 141 or sliding bearings. When the working environment is dusty, bearings with sealing rings can be selected to prevent contaminants from entering. When the working temperature range is large, high-temperature grease or solid lubricating bushings can be selected. The bearing assembly on the fixed plate 130 can also be adapted to the specific cross-sectional shape of the guide rail 200. For example, if a V-shaped guide surface is provided on the side of the guide rail 200, the bearing assembly can use a tapered bearing or a roller with a V-groove to form line contact with the guide rail 200, further improving the guiding accuracy. These variations do not deviate from the core concept of the coaxial rotational connection between the traveling sprocket 110 and the pulley assembly 120, and therefore should all be considered within the scope of protection of this invention.

[0043] The chain drive component 610 of the retraction and extension transmission assembly 600 is detachably connected to the base frame 300. After the photovoltaic device arrives on site, it can be quickly put into operation simply by installing the chain drive component 610 onto the base frame 300 and engaging it with the traveling sprocket 110. The drive component 620 can be a hand crank, an electric reducer, or a hydraulic motor, which can be flexibly selected according to the on-site power conditions and manpower availability. When using electric drive, a limit switch or encoder can also be integrated to achieve precise control of the unfolded position and can be linked with the intelligent monitoring system of the photovoltaic device to remotely execute unfolding and folding commands.

[0044] During assembly, the pulley assembly 120 is first installed on the first rotating shaft 630 using bolts and bushings, ensuring free rotation. Then, the traveling sprocket 110 is also installed on the first rotating shaft 630 using first fasteners, maintaining an appropriate axial clearance between the traveling sprocket 110 and the pulley assembly 120 to ensure flexible rotation relative to the pulley assembly 120. Next, the fixing plate 130 is connected to the photovoltaic panel frame using second fasteners 145, and the bearing assembly 140 is installed at the corresponding positions on the fixing plate 130 and the traveling sprocket 110. The preload of the bearing assembly 140 and the second rolling surface 220 of the guide rail 200 is adjusted to ensure the traveling mechanism is neither loose nor over-tightened on the guide rail 200. Finally, the entire traveling unit 100 is hoisted onto the guide rail 200, completing engagement with the chain 611. The entire assembly process requires no special tooling and can be completed by a regular fitter in a short time, significantly reducing on-site labor costs.

[0045] Other configurations and operations of the foldable mobile photovoltaic device according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A photovoltaic panel frame traveling mechanism, characterized in that, include: Connectors are used to connect to the photovoltaic panel frame; The walking unit is rotatably connected to the connecting member. The walking unit includes a walking sprocket and a pulley assembly. The pulley assembly is used to roll with the guide rail, and the walking sprocket is used to mesh with the chain to drive the photovoltaic panel frame to move along the guide rail. The walking sprocket is rotatably connected to the pulley assembly and is arranged relative to the same central axis.

2. The photovoltaic panel frame walking mechanism according to claim 1, characterized in that: The pulley assembly includes at least one rotating wheel, which includes a central rotating part and limiting flanges located on both sides of the rotating part. The limiting flanges on both sides together with the rotating wheel form an H-shaped cross-sectional structure.

3. The photovoltaic panel frame traveling mechanism according to claim 1, characterized in that: The traveling unit includes a fixed plate, the traveling sprocket and the fixed plate are respectively disposed on opposite sides of the pulley assembly, the traveling sprocket and / or the fixed plate are provided with a bearing assembly, the pulley assembly is in contact with the first rolling surface of the guide rail, and the bearing assembly is in contact with the second rolling surface of the guide rail.

4. The photovoltaic panel frame traveling mechanism according to claim 3, characterized in that: The bearing assembly includes a first bearing group and a second bearing group, wherein the first bearing group is connected to the fixed plate and the second bearing group is connected to the traveling sprocket.

5. The photovoltaic panel frame traveling mechanism according to claim 4, characterized in that: Both the first bearing assembly and the second bearing assembly include at least two rolling bearings, which are spaced apart along the extension direction of the guide rail.

6. The photovoltaic panel frame traveling mechanism according to claim 3, characterized in that: The bearing assembly includes a lubrication structure for lubricating the rolling bearing.

7. The photovoltaic panel frame traveling mechanism according to claim 4, characterized in that: The rolling bearing is a full complement needle roller bearing.

8. A foldable mobile photovoltaic device, characterized in that: include: Base frame; A photovoltaic panel assembly, wherein the photovoltaic panel assembly is connected to a photovoltaic panel frame traveling mechanism according to any one of claims 1 to 7, the photovoltaic panel assembly has an unfolded state and a folded state, and the photovoltaic panel assembly includes a plurality of photovoltaic panel components; A guide rail assembly is disposed on the base frame, the guide rail assembly extends along the unfolding direction of the photovoltaic panel assembly and is connected to the photovoltaic panel frame traveling mechanism; The retraction and extension transmission assembly includes a chain drive component and a drive component. The chain drive component is detachably connected to the base frame and is arranged side by side with the guide rail assembly. The chain drive component includes a chain adapted to engage with the travel sprocket. The drive component is used to drive the chain to guide the photovoltaic panel component to switch between the unfolded state and the folded state.

9. The foldable mobile photovoltaic device according to claim 8, characterized in that: The photovoltaic panel assembly includes multiple first rotating shafts and multiple second rotating shafts, and the pulley assembly and the traveling sprocket are disposed on the first rotating shafts; Wherein, two adjacent photovoltaic panel components are rotatably connected by a second rotating shaft; At least one end of each of the photovoltaic panel components is also rotatably connected to an adjacent photovoltaic panel component or the guide rail assembly via a first rotating shaft.

10. The foldable mobile photovoltaic device according to claim 8, characterized in that: The photovoltaic panel assembly also includes an unfolding limiting member, which is used to limit the maximum included angle between adjacent photovoltaic panel components so that the adjacent photovoltaic panel components can be kept in the unfolded state.

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