Solar power generation device

Abstract

The invention relates to the field of photovoltaic technology, and discloses a solar power generation device which comprises a supporting structure, a double-shaft tracking mechanism and a controller. The supporting structure comprises a center rod and a plurality of umbrella ribs, the umbrella ribs are used for installing a plurality of umbrella cloth assemblies with solar cells, and the umbrella ribs can be switched between a folded state and an unfolded state, so that the umbrella cloth assemblies are opened and closed in an umbrella shape. The double-shaft tracking mechanism comprises a first driving mechanism and a second driving mechanism, and the first driving mechanism is used for driving the supporting structure to change the inclination angle relative to the horizontal plane so as to track the solar elevation angle; and the second driving mechanism is used for driving the supporting structure to rotate around the vertical shaft so as to track the solar azimuth angle. The controller controls the action of the first driving mechanism and / or the second driving mechanism according to the sun moving trajectory, so that the illumination utilization efficiency is improved, the light receiving area is large after the device is unfolded, the device is convenient to store and protect after being folded, and good environmental adaptability is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic technology, and further relates to a solar power generation device. BACKGROUND

[0002] At present, with the continuous development of the field of solar power generation, some solar power generation devices adopt an umbrella-shaped structure, and a solar cell module is supported by unfolding a support, which is convenient for field deployment and mobile storage. However, such devices are usually fixed in structure, and after being unfolded, the angle cannot be dynamically adjusted according to the running track of the sun, resulting in poor light incidence and low power generation efficiency. SUMMARY

[0003] In view of the above technical problems, the present application aims to provide a solar power generation device which can balance the portable characteristics and dynamic light tracking capability of the umbrella-shaped solar power generation device.

[0004] In order to achieve the above-mentioned purpose, the present application provides a solar power generation device, comprising:

[0005] A support structure comprising a central rod and a plurality of ribs, the ribs being used to mount a canopy assembly with solar cells, the ribs being switchable between a folded state and an unfolded state, so that the canopy assembly is opened and closed in an umbrella shape;

[0006] A double-axis tracking mechanism comprising a first driving mechanism and a second driving mechanism, the first driving mechanism being used to drive the support structure to change the inclination angle relative to the horizontal plane, so as to track the altitude angle of the sun; the second driving mechanism being used to drive the support structure to rotate around a vertical axis, so as to track the azimuth angle of the sun;

[0007] A controller for controlling the movement of the first driving mechanism and / or the second driving mechanism, so that the canopy assembly mounted on the support structure chases the sun.

[0008] In some embodiments, the solar power generation device further comprises a switching mechanism, the switching mechanism comprising a conversion piece and a transmission structure, the conversion piece being movably arranged along the length direction of the central rod;

[0009] The transmission structure is connected to the central rod and the conversion piece, and is used to drive the conversion piece to move under the action of an external force, so as to drive the canopy assembly to unfold or fold around the central rod.

[0010] In some embodiments, the transmission structure comprises a rack and a gear engaged with the rack; wherein the rack is fixedly arranged along the axial direction of the central rod, the conversion member is in a ring structure, the conversion member comprises a central hole, a receiving cavity arranged beside the central hole and in communication with the central hole, and a fixed shaft arranged in the receiving cavity, the gear is arranged on the fixed shaft, the rotation center of the gear is perpendicular to the axial line of the central hole, and the conversion member can slide along the axial direction of the central rod under the action of an external force.

[0011] In some embodiments, the switching mechanism further comprises a limiting structure for preventing reverse movement of the conversion member after the conversion member moves to a preset position or during movement of the conversion member, so as to prevent accidental folding of the ribs.

[0012] In some embodiments, the limiting structure comprises a ratchet member and a pawl member, the ratchet member is coaxially arranged on the fixed shaft with the gear, and the pawl member is movably arranged on the conversion member, the pawl member is engaged with the ratchet member to achieve one-way limiting.

[0013] In some embodiments, the limiting structure comprises a release mechanism, the release mechanism comprises a control part linked with the pawl member, at least a part of the control part is exposed outside the conversion member, and the control part is movably arranged relative to the conversion member; wherein the control part can drive the pawl member to deviate from the engagement position of the ratchet member under the action of an external force, so as to release the one-way limiting.

[0014] In some embodiments, the central rod comprises a fixed part and a movable part:

[0015] The fixed part is fixedly arranged on a device base or a working ground, the movable part is pivotally connected to the fixed part, and the umbrella cloth assembly is correspondingly arranged on the movable part.

[0016] The first driving mechanism comprises a telescopic driving assembly, a fixed end of the telescopic driving assembly is arranged on the fixed part, and an output end of the telescopic driving assembly is drivingly connected to the movable part, so that the telescopic movement of the telescopic driving assembly can drive the movable part to pivot relative to the fixed part to change the solar elevation angle.

[0017] In some embodiments, the movable part extends to form a first connecting end and a second connecting end, the fixed part is fixedly arranged with a fixed connecting rod, the fixed connecting rod is hingedly connected between the first connecting end, and a movable connecting rod is hingedly connected between the output end of the telescopic driving assembly and the second connecting end, so as to form a closed-loop connecting rod mechanism.

[0018] In some embodiments, the telescopic driving assembly is connected with a first power source through a bevel gear pair.

[0019] The output end of the telescopic drive assembly comprises a main body part and a connecting part connected in sequence, the connecting part is connected with the movable part, at least part of the fixed part is in a hollow tubular structure, the main body part is movably embedded in the inside of the hollow tubular structure, the telescopic drive assembly further comprises a drive input shaft and a threaded transmission part, the drive input shaft is rotatably installed in the fixed part;

[0020] The threaded transmission part comprises a screw rod coaxially fixed with the drive input shaft and a telescopic nut engaged with the screw rod; the screw rod and the drive input shaft are integrally formed or separately formed;

[0021] The bevel gear pair comprises a first bevel gear and a second bevel gear engaged with each other, the first bevel gear is coaxially fixed to the drive input shaft, the second bevel gear is coaxially arranged with the first power source, and the drive input shaft is connected with the first power source through the bevel gear pair.

[0022] In some embodiments, the fixed part of the support structure and the output end of the telescopic drive assembly are provided with corresponding guide structures for limiting the circumferential rotation of the output end; wherein the telescopic nut is arranged in the main body part and is provided with a lateral sliding block penetrating through the circumferential wall of the main body part, so that it is movably clamped to the guide structure of the fixed part through the lateral sliding block.

[0023] In some embodiments, the second drive mechanism is arranged in the fixed part and / or the movable part, comprising a rotary drive shaft and a drive transmission assembly, the rotary drive shaft is arranged at a preset position of the support structure, the axis thereof coincides with the vertical rotation axis of the support structure, and the drive transmission assembly is in transmission connection with the rotary drive shaft for transmitting the output of the second power source to the rotary drive shaft.

[0024] Compared with the prior art, the solar power generation device provided by the application has at least the following beneficial effects:

[0025] The solar power generation device provided by the application adopts an umbrella-like expandable structure, has a large light receiving area in the expanded state, is beneficial to improve the light utilization rate, has a compact volume in the folded state, is convenient to carry and store, and can also reduce the stress risk in bad weather. Through the cooperation of the first drive mechanism and the second drive mechanism, the tracking adjustment of the solar altitude angle and the azimuth angle can be realized, so that the umbrella cloth assembly is always in a better light receiving angle, thereby improving the power generation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above-mentioned characteristics, technical features, advantages and implementation modes of the application will be further described in the following preferred embodiments combined with the drawings.

[0027] Figure 1 Fig. 1 is a schematic diagram of the overall structure of a solar power generation device according to an embodiment of the present application;

[0028] Figure 2 Fig. 2 is a schematic diagram of the overall structure of a solar power generation device according to an embodiment of the present application, from another perspective;

[0029] Figure 3 Fig. 3 is a schematic diagram of the exploded structure of a solar power generation device according to an embodiment of the present application;

[0030] Figure 4 Fig. 4 is a schematic diagram of the partial structure of a solar power generation device according to an embodiment of the present application;

[0031] Figure 5 Fig. 5 is a schematic diagram of the structure of a switching mechanism according to an embodiment of the present application;

[0032] Figure 6 Fig. 6 is a schematic diagram of the partial detail of a switching mechanism according to an embodiment of the present application;

[0033] Figure 7 Fig. 7 is a schematic diagram of the detail of a release mechanism according to an embodiment of the present application;

[0034] Figure 8 Fig. 8 is a schematic diagram of the partial structure related to a first drive mechanism according to an embodiment of the present application;

[0035] Figure 9 Fig. 9 is a schematic diagram of the detail related to a guide structure according to an embodiment of the present application;

[0036] Figure 10 Fig. 10 is a schematic diagram of the partial cross-sectional view related to a first drive mechanism according to an embodiment of the present application;

[0037] Figure 11 Fig. 11 is a schematic diagram of the partial structure related to a second drive mechanism according to an embodiment of the present application;

[0038] Figure 12 Fig. 12 is a schematic diagram of the partial cross-sectional view related to a second drive mechanism according to an embodiment of the present application.

[0039] BRIEF DESCRIPTION OF THE DRAWINGS Support structure 10; central rod 101; rib 102; auxiliary rod 103; fixed portion 11; movable portion 12; first connection end 13; second connection end 14; fixed link 15; movable link 16; umbrella cloth assembly 20;

[0040] The first driving mechanism 31 comprises a driving input shaft 3111, a screw rod 3112, a telescopic nut 3113, a protective shell 312, a guide structure 313, a lateral slider 3131, a sliding groove structure 3132, a main body 314, a connecting part 315, a first bevel gear 316, a second bevel gear 317, a manual impeller 318, and a fixed shaft 319.

[0041] The second driving mechanism 32 comprises a rotating driving shaft 321, a third bevel gear 3221, and a fourth bevel gear 3222. The manual handle 33 is arranged on the rotating driving shaft 321.

[0042] The switching mechanism 40 comprises a receiving cavity 400, a conversion piece 401, a rack 402, a gear 403, a top plate 404, a central hole 405, a fixed shaft 406, a ratchet piece 411, a one-way meshing tooth 4110, a pawl piece 412, a release mechanism 413, an operation part 4131, a return piece 4132, a rotating shaft 4133, and a fixed seat 4134. DETAILED DESCRIPTION

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0044] In order to make the drawing simple, only the parts related to the application are shown in each drawing, and they do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0045] It should be further understood that the term "and / or" used in the specification and the appended claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0046] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0049] The existing part of the solar power generation device is designed to be opened and closed in order to adapt to the application scenarios of outdoor temporary deployment, portable movement, etc. By arranging a plurality of solar cell modules on the umbrella-shaped support framework, the device can be unfolded to receive sunlight during use, and can be folded to reduce the volume and facilitate transportation in the non-working state. This structure has certain portability and storage advantages, and is suitable for field work, emergency power supply in disaster areas and other scenarios.

[0050] However, since the support structure is mostly fixed at a certain opening angle or mechanically opened and closed, the elevation angle and orientation of the umbrella surface are difficult to adjust once they are arranged, and dynamic tracking control of the sun's orbit cannot be achieved. As the sun's altitude and azimuth change constantly during the day, the angle of incidence of sunlight often deviates from the optimal receiving direction of the solar cell module, significantly reducing the light energy utilization efficiency and overall power generation efficiency.

[0051] In one embodiment, referring to the drawings attached Figure 1 The solar power generation device provided by the present application is described, which can have an umbrella-shaped folding and unfolding structure and can also realize dual-axis tracking adjustment of the sun's altitude and azimuth.

[0052] Referring to the drawings attached Figure 1 and Figure 2 The solar power generation device provided by the present application mainly includes a support structure 10, a dual-axis tracking mechanism, a controller and an energy storage module.

[0053] Specifically, the support structure 10 is used to carry the umbrella cloth assembly 20 with solar cells, and the body structure can be switched between a folded state and an unfolded state. When unfolded, the support structure 10 forms an outward radial distribution, enabling the umbrella cloth assembly 20 to be laid flat and enhancing the overall light receiving area; in the folded state, the support structure 10 is aggregated inwardly to a near-central region, and the overall volume is significantly compressed, facilitating movement, storage or temporary deployment scenarios.

[0054] Further, as shown in Figure 3 The first driving mechanism 31 is used to adjust the pitch of the support structure 10 in the vertical direction through a driving assembly arranged at a specific structural position, so that the solar cells on the umbrella cloth assembly 20 can be appropriately inclined to the change in the height of the sun in different time periods, maintaining a good light receiving posture.

[0055] The second driving mechanism 32 provides rotation capability around the vertical axis direction, and adjusts the azimuth angle of the overall support structure 10, so that the device maintains the daily state of the solar cells on the umbrella cloth assembly 20 during the east-west movement of the sun, thereby improving the effective light receiving time. The above two groups of driving mechanisms can operate respectively or cooperatively under control strategy to achieve tracking adaptation to the sun's running track in all-weather range.

[0056] The controller is used to schedule the operation of the above driving mechanisms. In general, the controller can cooperate with detection elements or environmental information acquisition units to generate control instructions by comprehensively considering time, sun position, solar irradiance and other parameters. Through the instructions output by the module, the first driving mechanism 31 and the second driving mechanism 32 can make corresponding adjustments, so that the support structure 10 always maintains a position close to the angle of the sun's direct rays, thereby improving the photovoltaic conversion efficiency.

[0057] In addition, the device is also provided with an energy storage module electrically connected with the umbrella cloth assembly 20, which is used to receive and store the generated electric energy. Optionally, the energy storage module can be arranged in the support structure 10 or the device base, and can specifically include an energy storage battery, an energy regulation unit, an output interface and the like. Through linkage with the power generation module, the energy storage module can not only supply power to external loads, but also maintain stable power supply during no light period, thereby enhancing the continuous power supply capability of the device.

[0058] In one embodiment, as shown in Figure 4As shown, the solar power generation device further comprises a switching mechanism 40 on the basis of the base structure, for driving or guiding the support structure 10 to switch between the unfolded and folded states, thereby improving the convenience and adaptability of the device. The opening and closing state of the support structure 10 not only affects the light receiving area and power generation efficiency of the device, but also relates to the occupied volume and transportation convenience of the device in the non-working state. Therefore, the setting of the switching mechanism 40 plays an important role in practical application.

[0059] In this embodiment, the support structure 10 comprises a central rod 101 and a plurality of ribs 102. The central rod 101 is used to provide support for each rib 102. The plurality of ribs 102 are arranged circumferentially along the central rod 101, and each rib 102 supports a corresponding umbrella cloth assembly 20, so that the solar cells are arranged in a radial manner in the unfolded state. In order to ensure that the solar cell assembly can maintain a reasonable angle distribution, a plurality of installation sites can be pre-set on each rib 102, so that the umbrella cloth assembly 20 with solar cells is fixed and arranged in the required array manner.

[0060] Each rib 102 is movably connected to the central rod 101 by the switching mechanism 40, so that under the guidance or driving action of the switching mechanism 40, each rib 102 can be synchronously unfolded or folded around the axis direction of the central rod 101. In the unfolded state, the ribs 102 are unfolded outwardly, so that the solar cell assemblies are distributed in the space to the maximum extent, forming a lighting structure with a large effective light receiving area; and in the folded state, each rib 102 can be folded inwardly close to the central rod 101, and the overall structure tends to be compact, significantly reducing the floor space and space volume, facilitating carrying, transportation or storage.

[0061] It can be understood that the setting of the switching mechanism 40 enables the entire umbrella-like structure to have good deformation ability and structural consistency, which can ensure that each rib 102 is synchronously linked and avoids the problems of jamming or interference caused by independent unfolding and folding. At the same time, this structure can adapt to the needs of different lighting conditions or working scenarios, quickly unfold into the working state before use, and quickly fold into the standby or transportation state after use, thereby improving the response efficiency and operation flexibility of the overall device.

[0062] In some optional implementations, the switching mechanism 40 can control the unfolding angle and action sequence of the ribs 102 through track guidance, rope traction, torsional traction and other configurations, to ensure the balance and stability during the unfolding and folding process, and to reduce problems such as component wear or structural deviation.

[0063] Based on the above embodiment, in one embodiment, the switching mechanism 40 comprises a conversion piece 401, and a transmission structure for realizing guiding cooperation between the central rod 101 and the conversion piece 401.

[0064] Specifically, the conversion piece 401 is movably connected to the central rod 101 and can slide along the axial direction of the central rod 101. The conversion piece 401 can be in the form of a ring, a semi-ring, or other structures that are adapted to the outer contour of the central rod 101, and the conversion piece 401 is rotationally connected to the inner end of each rib 102 (the end away from the umbrella cloth assembly 20). When it slides under the guidance of the transmission structure, it can expand or retract the ribs 102 by moving itself.

[0065] The transmission structure is arranged between the central rod 101 and the conversion piece 401 and can guide the conversion piece 401 to slide in a predetermined direction. Generally, the transmission structure can include guide rails, matching grooves, channel structures, or other similar guide components and can be driven by external force. In addition, the source of external force can be flexibly set, such as by manual force, an electric module, or other external components, and the specific implementation mode is not limited.

[0066] In the embodiment, the conversion piece 401 is connected to the inner end of each rib 102, and the linear sliding of the conversion piece 401 along the central rod 101 can simultaneously drive all the ribs 102 to expand or retract in a unified path, thereby ensuring that the support structure 10 quickly switches between the working state and the non-working state and maintaining the coordination between the components to avoid structural interference or inconsistent action.

[0067] Based on the above embodiment, the transmission structure can be stepless or multi-step according to application requirements. For example, the stepless structure can adopt a continuous sliding guide rail and the like, so that the conversion piece 401 can stop at any position during sliding to achieve fine control of the expansion angle of the ribs 102; and the multi-step structure can divide the expansion process into several fixed steps by setting stepped stop positions, limiting holes, and card slot matching and the like, thereby facilitating quick switching and stably maintaining the structure at a specific angle. It should be noted that different forms of transmission structures can be selected and applied according to the device deployment mode, the control system capacity, and the use environment difference.

[0068] In a further embodiment, the transmission structure adopts the meshing transmission of the rack 402 and the gear 403. The transmission structure includes the rack 402 arranged on the outer surface of the central rod 101 and the gear 403 arranged inside the conversion piece 401. The rack 402 extends along the axial direction of the central rod 101 and is fixed to the outer wall surface of the central rod 101. The teeth can be straight teeth, inclined teeth, or other tooth surfaces with an angle that is adapted to meshing. The setting position of the rack 402 can be located on one side of the central rod 101 or distributed in a ring shape on the circumferential surface of the central rod 101, so as to facilitate effective cooperation with the gear 403 inside the conversion piece 401.

[0069] Please refer to the instruction manual. Figure 5 In this embodiment, the conversion component 401 has a ring-shaped structure and is sleeved on the outside of the central rod 101, so as to connect with the inner end of each umbrella rib 102 and move in coordination during the unfolding or closing of the umbrella rib 102.

[0070] More specifically, the adapter 401 has a central hole 405, allowing it to be fitted onto the outside of the central rod 101 to form a sliding fit. Inside the adapter 401, beside the central hole 405, there is a receiving cavity 400 communicating with it. (See attached diagram.) Figure 5 and Figure 6 Gear 403 is rotatably mounted on fixed shaft 406 within accommodating cavity 400. Fixed shaft 406 is laterally positioned between the two side walls of accommodating cavity 400, such that the rotation center of gear 403 is perpendicular to the axis of central hole 405, thereby enabling the conversion between axial sliding and rotary drive during device operation. Part of gear 403 extends from the accommodating cavity 400 toward the central hole 405 and protrudes into the opening, allowing its tooth surface to naturally mesh with rack 402.

[0071] During the application of external force, such as through an electric module or a manual drive device, the gear 403 rotates relative to the rack 402. Since the rack 402 is fixed in position, the gear 403 will drive the entire conversion component 401 to produce linear displacement along the axial direction of the central rod 101 during rotation. This displacement is then transmitted through several auxiliary rods 103 connected to the periphery of the conversion component 401 (see below and the instruction manual). Figure 4 This is further transmitted to the middle of each umbrella rib 102, thereby achieving synchronous expansion or contraction of the umbrella rib 102 relative to the central rod 101.

[0072] With the above structural design, on the one hand, the smooth sliding of the conversion component 401 can be achieved through the transmission cooperation of the gear 403 and the rack 402, and the positioning accuracy can be improved. This helps to accurately control the opening and closing state of the umbrella rib 102, so that the device can be applied to scenarios that require continuous deployment and staged deployment.

[0073] On the other hand, since the gear 403 is housed within a separate cavity 400, dust intrusion and environmental wear caused by its exposure are avoided, thereby enhancing the structure's durability and ease of maintenance. Additionally, as shown in the attached... Figure 5 As shown, in the embodiments of this application, the conversion component 401 also includes a top plate 404 for sealing the upper opening of the accommodating cavity 400 mentioned above. This arrangement makes the subsequent maintenance and repair process of the device more convenient. Maintenance personnel can directly remove the screws with tools (such as screwdrivers) and remove the top plate 404 to maintain or replace the gear 403 in the accommodating cavity 400, which significantly reduces maintenance costs and improves the long-term reliability of the equipment.

[0074] In one embodiment, reference can be made to the accompanying drawings Figure 4 The support structure 10 further comprises a plurality of auxiliary rods 103, each of which is arranged between the umbrella rib 102 and the conversion piece 401, wherein the two ends of the auxiliary rod 103 are connected to the umbrella rib 102 and the peripheral wall of the conversion piece 401 by hinged connection, so that during the axial movement of the conversion piece 401, the auxiliary rod 103 transmits the pulling or pushing force to drive the umbrella rib 102 to realize synchronous unfolding or folding.

[0075] Specifically, each umbrella rib 102 is provided with a hinged point at an appropriate position close to the middle or deviated from the head (the side close to the center rod 101 is referred to as the head in the present application, and the side away from the center rod 101 is referred to as the tail), which is used to connect with one end of the auxiliary rod 103, and the other end of the auxiliary rod 103 is hinged to the corresponding position of the outer peripheral surface of the conversion piece 401, thereby forming a movable linkage unit. When the conversion piece 401 slides axially along the center rod 101, the auxiliary rod 103 drives the umbrella rib 102 to make a radial opening or folding movement around the hinged point, thereby realizing smooth switching of the entire umbrella structure.

[0076] In addition, the head of the umbrella rib 102 is also connected to the center rod 101 by hinged connection; at the same time, an auxiliary support structure, such as a ring-shaped positioning frame, a guide groove, etc., can be arranged on the center rod 101, which is used to limit the rotational freedom of the head of the umbrella rib 102 or to pre-set the rotation angle range thereof, so as to prevent overpositioning or tilting during unfolding, and to improve the repeated accuracy and structural durability of the device during multiple opening and closing processes.

[0077] In one embodiment, in order to prevent the conversion piece 401 from moving in the reverse direction due to non-controlled factors such as gravity, self-elastic restoring force, wind load interference, etc. during the sliding process or after reaching the target position, thereby causing unintended folding of the umbrella rib 102, a limiting structure is further arranged in the switching mechanism 40, which is used to selectively prevent reverse displacement of the conversion piece 401 after it moves to the pre-set position or in the sliding path.

[0078] In some embodiments, the limiting structure can include a frictional deformation retreat-stop component, which is arranged on the outer wall of the center rod 101 or adjacent to the boundary part of the sliding path of the conversion piece 401, and is configured as a limiting part with a certain elastic recovery ability, such as a deformation arm, a pressing spring sheet or an embedded rubber plug, etc.

[0079] When the conversion piece 401 slides along the preset direction, the slight elastic deformation of the limiting part can be overcome to achieve passing; but when trying to move in the opposite direction, the limiting part provides resistance or springback resistance due to inconsistent deformation direction or reverse friction direction, thereby preventing substantial displacement. In addition, by adjusting the material rigidity or deformation amount of the friction part, the limiting effect can be flexibly adjusted to balance the holding force and the release force.

[0080] In another embodiment, referring to the description and drawings Figure 6 and Figure 7 The limiting structure includes a ratchet piece 411 and a pawl piece 412, and the pawl piece 412 is movably arranged on the conversion piece 401. The ratchet piece 411 has a circular ring structure, and the outer periphery is uniformly provided with a plurality of one-way engagement teeth 4110. Generally, the one-way engagement teeth 4110 are provided with inclined surfaces, curved surfaces or buffer structures in the moving direction of the ratchet piece 411, so as to facilitate the smooth sliding of the pawl piece 412 in a specific direction, and form mechanical engagement in the opposite direction.

[0081] The pawl piece 412 is arranged inside the conversion piece 401, for example, in the accommodating cavity 400 in the above description. During operation, when the conversion piece 401 slides in the unfolding direction of the ribs 102, the one-way engagement teeth 4110 can slide through the pawl piece 412 due to the guide of the inclined surfaces of the one-way engagement teeth 4110, without causing action resistance. However, when the conversion piece 401 tries to slide in the opposite direction, the pawl piece 412 will be embedded between adjacent one-way engagement teeth 4110, thereby forming resistance to prevent reverse displacement of the conversion piece 401.

[0082] Specifically, it can be understood in combination with the above embodiments, for example, the ratchet piece 411 and the gear 403 in the above embodiments are coaxially arranged on the fixed shaft 406. When the conversion piece 401 moves to generate displacement to unfold the support structure 10 through the cooperation of the gear 403 and the rack 402, the ratchet piece 411 also rotates synchronously. When the conversion piece 401 moves to the position, if reverse motion is generated, the ratchet piece 411 can be braked by the pawl piece 412.

[0083] Through the cooperation of the ratchet piece 411 and the pawl piece 412, one-way limiting control of the sliding process of the conversion piece 401 is realized. Moreover, the limiting function is realized without affecting the normal operation of the switching mechanism 40, and does not depend on the external electric control system, which can effectively improve the safety and reliability of the device.

[0084] In one embodiment, the limiting structure further includes a release mechanism 413 for temporarily releasing the pawl piece 412 from the engagement relationship with the ratchet piece 411 under a specific operation, thereby allowing the conversion piece 401 to slide in the opposite direction, realizing the conversion of the ribs 102 from the unfolded state to the folded state.

[0085] Specifically, the release mechanism 413 is at least partially connected to the pawl 412, and can apply a driving force to the pawl 412 in the disengagement direction from the ratchet 411 through mechanical pulling, rotating, pushing, or other control actions. Under the action of the release mechanism 413, the pawl 412 deflects or lifts from its original state of being engaged between the meshing teeth of the ratchet 411, avoiding the original jamming position, thereby releasing the limiting effect on the conversion member 401. At this time, under the drive of external force or the action of gravity, the conversion member 401 can slide in the opposite direction in the axial direction of the central rod 101, causing the umbrella ribs 102 to close smoothly.

[0086] In one embodiment, please refer to the appendix to the specification. Figure 6 The release mechanism 413 includes a control unit 4131, which is linked to the pawl member 412 in the above embodiment. At least part of the control unit 4131 is exposed outside the conversion member 401 and is movable relative to the conversion member 401. When it is necessary to release the limit, the control unit 4131 moves under the action of external force, thereby causing the pawl member 412 to deviate from its meshing position with the ratchet member 411.

[0087] In addition, such as Figure 7 As shown, the release mechanism 413 is also provided with a return member 4132, which is connected to the control unit 4131 so that the control unit 4131 can automatically return to its original position after operation, similar to a foolproof design, ensuring that the release mechanism 413 will not affect the normal limiting function of the pawl member 412 when not in use. In this embodiment, the return member 4132 is a torsion spring.

[0088] In practical applications, please refer to the appendix. Figure 6 The control unit 4131 can be a movable lever connected to the pawl 412 (or a slider or a pressing structure in other ways). The release mechanism also includes a rotating shaft 4133 and a fixed seat 4134. The fixed seat 4134 is fixedly connected to the conversion member 401. The rotating shaft 4133 passes laterally through the movable lever and is connected to the shaft hole of the fixed seat 4134 to realize the rotation of the movable lever.

[0089] A pawl 412 is provided on one end of the movable lever (the movable lever and the pawl 412 can be formed separately and then connected by a connecting structure, or they can be formed as one piece, which is not limited here), and the other end extends to the outside of the conversion part 401 for manual operation by the user.

[0090] The engagement end of the pawl member 412 is provided with a one-way engagement tooth 4110 towards the outer periphery of the ratchet member 411, which is embedded between the tooth grooves of the ratchet member 411 to form a limit when the limit is not released. When the movable lever is driven by an external force such as pressing, corresponding rotation is generated by the provision of the rotating shaft 4133, which drives the pawl member 412 to deflect, so that the engagement end gradually leaves the tooth grooves of the ratchet member 411, thereby realizing temporary release of the engagement state.

[0091] It should be noted that the inner cavity structure of the conversion member 401 and the fixing seat 4134 are pre-provided with a free space or a displacement slot for the oscillation of the pawl member 412, so as to avoid contact conflict between the rotating track of the pawl member 412 and the surrounding wall during the release of the limit.

[0092] When the control part is no longer under stress, the pawl member can restore the original state under the action of the return member 4132, and re-form engagement with the ratchet member 411. Such a setting enables the device to realize switching operation of the limiting state without the intervention of tools, thereby improving the convenience and safety of use.

[0093] Therefore, through the provision of the release mechanism 413, the switching mechanism 40 not only has reliable one-way limiting capability, but also has controllable bidirectional release capability, so that the unfolding and folding process of the entire umbrella-shaped structure can be mechanically controlled.

[0094] In one embodiment, as shown in Figure 3 The support structure 10 includes a fixed part 11 and a movable part 12. The fixed part 11 is fixedly arranged on the device base or the working ground, and is used to provide a stable structural support base. The movable part 12 is pivotally connected to the fixed part 11, and carries a plurality of umbrella cloth assemblies 20, so that the movable part 12 can rotate relative to the fixed part 11 about a predetermined pivot axis, thereby realizing continuous or stepwise adjustment of the overall power generation surface elevation angle.

[0095] Meanwhile, the first driving mechanism 31 in the solar power generation device includes a telescopic driving assembly. The fixed end of the telescopic driving assembly is arranged on the fixed part 11, and is used to form relative connection with the fixed part 11. The output end is connected to the corresponding structure of the movable part 12 through a connecting member, thereby forming a stable force transmission path.

[0096] During operation, when the telescopic driving assembly is elongated or contracted, the output end will exert a pushing or pulling force on the movable part 12, thereby driving the movable part 12 to pivot. As a result, the umbrella cloth assemblies 20 carried by the movable part 12 are also adjusted in elevation angle, thereby realizing self-adaptive tracking of the solar elevation angle.

[0097] It should be noted that in actual application, the telescopic drive assembly can adopt various forms, such as hydraulic cylinder, pneumatic cylinder, screw rod, flexible rope winding and unwinding mechanism, etc., and the specific selection can be reasonably configured according to the design requirements. In addition, the automatic fine adjustment of the elevation angle can be realized by setting an angle feedback mechanism or a telescopic amount identification module in the controller, and the intelligent level of the system operation is further improved.

[0098] In one embodiment, on the basis of the above, Figures 8 to 10 As shown in the figure, the movable part 12 in the support structure 10 extends to form a first connecting end 13 and a second connecting end 14, and the two connecting ends are respectively located at the side end of the movable part 12 close to the fixed part 11, used to build a hinged connection relationship with other components.

[0099] Among them, the fixed part 11 is fixedly provided with a fixed connecting rod 15, and the fixed connecting rod 15 is hingedly connected between the first connecting end 13. The fixed connecting rod 15 serves as a fixed component and provides certain support. The output end of the telescopic drive assembly is hingedly connected with the second connecting end 14 through an active connecting rod 16, which is used to effectively convert the axial telescopic force into the pitching movement of the movable part 12 when the telescopic drive assembly is actuated.

[0100] The above-mentioned fixed connecting rod 15 and active connecting rod 16 are connected to different positions of the movable part 12, so that the telescopic drive assembly, the fixed part 11 and the movable part 12 together form a set of closed-loop connecting rod mechanisms, which can ensure that the movable part 12 realizes controlled swinging around the preset rotation axis during driving. Not only the motion trajectory is predictable and the output stability is strong, but also the movement freedom of the movable part 12 can be limited to prevent nonlinear deformation from deviating from the expected path.

[0101] In addition, by reasonably configuring the hinge point position and connecting rod length ratio of the connecting end, the swing angle range, response speed and angle accuracy of the movable part 12 can be pre-adjusted or fine-adjusted, so as to adapt to different regional sunlight conditions and seasonal changes. Moreover, the closed-loop connecting rod mechanism has stronger structural stability and load symmetry, and is suitable for solar power generation scenes with high requirements for wind resistance; as shown in the figure, the first drive mechanism 31 further includes a protective shell 312, which is arranged outside the above-mentioned closed-loop connecting rod mechanism, and further, the protective shell 312 is provided with a swing hole matched with the swing angle of the movable part 12. Figures 1 to 3

[0102] ​In the specific working process, when the telescopic driving assembly is driven, the output end will generate a pushing or pulling force in the axial direction, which is transmitted to the movable part 12 through the articulated connection of the movable connecting rod 16 with the output end and the second connecting end 14 of the movable part 12. Since the movable connecting rod 16 has a predetermined rigidity and length, and its two ends are respectively articulated with the output end of the telescopic driving assembly and the second connecting end 14 of the movable part 12, during the telescopic driving process, the movable connecting rod 16 generates a swing relative to the fixed part 11 (rotation around the articulation points at its two ends), thereby pushing the second connecting end 14 to move along a predetermined trajectory.

[0103] At the same time, the first connecting end 13 of the movable part 12 is articulated with the fixed connecting rod 15, and since the movable part 12 is an integral component, the movement of the second connecting end 14 will inevitably cause the entire movable part 12 to swing correspondingly. At this time, the first connecting end 13 and the fixed connecting rod 15 also rotate relative to each other, thereby forming a state in which multiple articulation points in the connecting rod mechanism rotate cooperatively, so that the entire movable part 12 completes angle adjustment around a predetermined pitch axis.

[0104] In the above manner, when the telescopic driving assembly is adjusted in the telescopic manner, the movable part 12 can generate smooth pitch changes within the structural limitation range through the cooperative action of the movable connecting rod 16 and the fixed connecting rod 15, so as to ensure that the umbrella cloth assembly 20 continuously stays in an optimal angle range, thereby improving the sunlight utilization efficiency and the power generation output stability.

[0105] In one embodiment, the telescopic driving assembly is connected with an external first power source through a bevel gear pair, which is used to convert the rotary motion generated by the external first power source into the axial linear motion of the telescopic driving assembly.

[0106] In specific applications, the first power source can adopt a manual driving structure (such as a knob, a dial, a rotating rod) or an electric driving device (such as a small motor, a servo driver, etc.) to realize. When the first power source rotates, the bevel gear connected with the output shaft of the first power source will drive the other bevel gear engaged therewith to rotate, thereby driving the propelling structure inside the telescopic driving assembly to perform axial telescopic action, so as to realize the pitch driving of the movable part 12.

[0107] At the same time, the fixed part 11 of the support structure 10 and the output end of the telescopic driving assembly are also provided with corresponding guide structures 313. Generally, the guide structure 313 is a matching structure such as a sliding rail or a guide groove, which functions to constrain the circumferential rotation freedom of the output end, so that it cannot rotate when being rotationally driven, and only allows linear displacement in the axial direction.

[0108] It can be understood that stable mechanical conversion can be realized through the cooperation of the above structure. Compared with the traditional electric push rod direct drive or hydraulic telescopic drive mode, the scheme of the embodiment not only has higher structural flexibility, but also can adapt to different load and speed requirements by replacing the first power source or the type of gear, and has good adaptability and expansibility.

[0109] In one embodiment, the output end of the telescopic drive assembly includes a main body part 314 and a connecting part 315, which are connected in sequence. Based on the above embodiment and the accompanying drawings, the connecting part 315 is in transmission connection with the movable part 12, for transmitting the driving force of the output end to the movable part 12. The fixed part 11 is at least partially in a hollow tubular structure, and the main body part 314 is movably embedded in the inside of the hollow tubular structure and can reciprocally slide along the axial direction thereof.

[0110] The telescopic drive assembly includes a driving input shaft 3111 and a threaded transmission part. The driving input shaft 3111 is rotatably installed on the fixed part 11, for receiving a rotary input from the external first power source. The threaded transmission part includes a screw rod 3112 coaxially fixed with the driving input shaft 3111, and a telescopic nut 3113 in meshing cooperation with the screw rod 3112. The screw rod 3112 and the driving input shaft 3111 can be integrally formed or separately connected according to specific application requirements.

[0111] Specifically, reference can be made to the accompanying drawings Figure 9 The telescopic nut 3113 is arranged inside the main body part 314, and at least one lateral sliding block 3131 is arranged on the circumferential outer wall of the telescopic nut 3113. The lateral sliding block 3131 penetrates through the circumferential wall of the main body part 314 and is movably clamped in the guide structure 313 of the fixed part 11.

[0112] In the embodiment, the guide structure 313 on the fixed part 11 is in the form of a sliding groove structure 3132, and the number of the sliding groove structure 3132 corresponds to the number of the lateral sliding block 3131. The sliding groove structure 3132 is used to apply rotary constraint to the telescopic nut 3113, so that only linear movement in the axial direction is allowed. In this way, the driving input shaft 3111 can drive the telescopic nut 3113 to move along the axial direction of the screw rod 3112 during rotation, thereby driving the entire main body part 314 to move. The connecting part 315 connected with the main body part 314 can then apply a force to the movable part 12 of the support structure 10 to complete the pitch angle adjustment of the movable part 12.

[0113] In specific implementation, reference can be made to the accompanying drawings Figure 10The driving input shaft 3111 is connected with the external first power source through a bevel gear pair. The bevel gear pair comprises a first bevel gear 316 and a second bevel gear 317 which are engaged with each other, wherein the first bevel gear 316 is coaxially fixed on the driving input shaft 3111, and the second bevel gear 317 is coaxially arranged on the first power source, such as the manual impeller 318 in the drawings. Specifically, the second bevel gear 317 is coaxially fixed to the fixed shaft 319 on the manual impeller 318, thereby achieving a transmission turning at a vertical angle in the spatial layout, so as to facilitate the power input in a narrow structure.

[0114] In one embodiment, based on the above, as shown in the accompanying Figure 11 and Figure 12 The second driving mechanism 32 is used to realize the rotation adjustment of the support structure 10 around the vertical axis, so as to complete the tracking of the solar azimuth angle. In practical application, the second driving mechanism 32 can be flexibly arranged at different positions of the support structure 10, for example, can be arranged separately on the fixed part 11 of the support structure 10, or can be arranged separately on the movable part 12 of the support structure 10, of course, a plurality of second driving mechanisms 32 can be arranged respectively on the fixed part 11 and the movable part 12, which is not limited in the embodiment.

[0115] In the embodiment, the second driving mechanism 32 mainly comprises a rotating driving shaft 321 and a driving transmission assembly. The rotating driving shaft 321 is installed at a predetermined position of the support structure 10, and the axis line thereof coincides with the vertical rotation axis of the support structure 10, so as to realize the azimuth rotation of the support structure 10 as a whole around the vertical rotation axis of the support structure 10.

[0116] The driving transmission assembly is in transmission connection with the rotating driving shaft 321. The driving transmission assembly can comprise a set of transmission structure members arranged in cooperation with each other, such as the similar bevel gear pair or the worm gear mechanism in the first driving mechanism 31, which is used to convert the driving force from the second power source into the acting force for driving the rotating driving shaft 321 to rotate, so that the support structure 10 can be controlled to rotate along the vertical axis under the action of the second driving mechanism 32, thereby making the umbrella cloth assembly 20 always face the solar azimuth, realizing the efficient tracking of the sunlight path, and effectively improving the power generation utilization rate.

[0117] The second power source can be a manual crank 33 or an electric driver, etc. Figure 12 For example, when the device azimuth angle adjustment is realized by adopting the configuration of the bevel gear, the second power source can be a manual crank 33 or an electric driver, etc. The output rotary motion thereof is converted and transmitted through the third bevel gear 3221 and the fourth bevel gear 3222, so as to drive the rotating driving shaft 321 to rotate. The rotating driving shaft 321 and the corresponding part of the support structure 10 are fixedly connected, and finally at least a part of the support structure 10 provided with the umbrella cloth assembly 20 is driven to rotate around the vertical axis relative to the device base or the related joint, so as to realize the accurate tracking of the solar azimuth angle.

[0118] It should be noted that the above embodiments can be freely combined as desired. The above is only a preferred embodiment of the present application, and it should be pointed out that, for those skilled in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A solar power plant, characterized by, The solar power generation device comprises: a support structure comprising a central rod and a plurality of ribs for mounting a canopy assembly with solar cells, the ribs being capable of switching between a folded state and an unfolded state so that the canopy assembly is opened and closed like an umbrella; a double-axis tracking mechanism comprising a first driving mechanism for driving the support structure to change the inclination angle relative to the horizontal plane to track the altitude angle of the sun; and a second driving mechanism for driving the support structure to rotate around a vertical axis to track the azimuth angle of the sun; a controller for controlling the movement of the first driving mechanism and / or the second driving mechanism so that the canopy assembly mounted on the support structure chases the sun.

2. The solar power generation device according to claim 1, further comprising a switching mechanism comprising a conversion piece and a transmission structure, the conversion piece being movably arranged along the length direction of the central rod.

3. The solar power generation device according to claim 2, wherein the transmission structure comprises a rack and a gear meshingly arranged on the rack.

4. The solar power generation device according to claim 3, wherein the switching mechanism further comprises a limiting structure for preventing reverse movement of the conversion piece after the conversion piece moves to a preset position or during the movement of the conversion piece, so as to prevent accidental folding of the ribs.

5. The solar power generation device according to claim 4, wherein the limiting structure comprises a ratchet piece coaxially arranged on the fixed shaft with the gear, and a pawl movably arranged on the conversion piece, the pawl being engaged with the ratchet piece to achieve one-way limiting.

6. The solar power generation device according to claim 5, wherein the limiting structure comprises a release mechanism comprising a control portion linked with the pawl, the control portion being at least partially exposed outside the conversion piece and movably arranged relative to the conversion piece, wherein the control portion can drive the pawl to deviate from the engagement position with the ratchet piece under the action of external force, so as to release the one-way limiting.

7. The solar power generation device according to any one of claims 1-6, wherein the central rod comprises a fixed portion and a movable portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ The fixed part is fixed to a device base or a working ground, the movable part is pivotally connected to the fixed part, and the umbrella cloth assembly is correspondingly arranged on the movable part; The first driving mechanism comprises a telescopic driving assembly, a fixed end of the telescopic driving assembly is arranged on the fixed part, and an output end of the telescopic driving assembly is drivingly connected to the movable part, so that the telescopic movement of the telescopic driving assembly can drive the movable part to pivot relative to the fixed part to change the solar altitude angle.

8. The solar power generation device according to claim 7, wherein The movable part extends to form a first connecting end and a second connecting end, the fixed part is fixed with a fixed connecting rod, the fixed connecting rod is hingedly connected with the first connecting end, and an active connecting rod is hingedly connected between the output end of the telescopic driving assembly and the second connecting end, so as to form a closed-loop connecting rod mechanism.

9. The solar power generation device according to claim 8, wherein The telescopic driving assembly is connected with the first power source through a bevel gear pair; The output end of the telescopic driving assembly comprises a main body part and a connecting part connected in sequence, the connecting part is connected with the movable part, at least part of the fixed part is in a hollow tubular structure, the main body part is movably embedded in the inside of the hollow tubular structure, the telescopic driving assembly further comprises a driving input shaft and a threaded transmission part, and the driving input shaft is rotatably installed on the fixed part; The threaded transmission part comprises a screw rod coaxially fixed with the driving input shaft and a telescopic nut meshing with the screw rod; the screw rod and the driving input shaft are integrally formed or separately formed; The bevel gear pair comprises a first bevel gear and a second bevel gear meshing with each other, the first bevel gear is coaxially fixed on the driving input shaft, the second bevel gear is coaxially arranged on the first power source, and the driving input shaft is connected with the first power source through the bevel gear pair.

10. The solar power generation device according to claim 9, wherein The fixed part of the support structure and the output end of the telescopic driving assembly are provided with corresponding guide structures for limiting the circumferential rotation of the output end; The telescopic nut is arranged on the main body part and is provided with a lateral sliding block penetrating through the circumferential wall of the main body part, so that the telescopic nut is movably clamped on the guide structure of the fixed part through the lateral sliding block.

11. The solar power generation device according to any one of claims 8-10, wherein The second driving mechanism is arranged on the fixed part and / or the movable part, comprises a rotating driving shaft and a driving transmission assembly, the rotating driving shaft is arranged at a preset position of the support structure, the axis of the rotating driving shaft coincides with the vertical rotation axis of the support structure, and the driving transmission assembly is drivingly connected with the rotating driving shaft for transmitting the output of the second power source to the rotating driving shaft.

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