Torsion transmission connecting structure and photovoltaic tracking support system

Abstract

The application provides a torsion transmission connection structure and a photovoltaic tracking support system, wherein the torsion transmission connection structure comprises a transmission shaft, a torsion transmission unit and a shaft coupling, the transmission shaft and a power shaft of the torsion transmission unit are respectively provided with a first accommodating cavity and a second accommodating cavity, the shaft coupling comprises a body and a connecting structure arranged on the body; in use, the transmission shaft and the power shaft are coaxially arranged in each other, the body is arranged in the first accommodating cavity or the second accommodating cavity with a smaller radial dimension, and the connecting structure penetrates the transmission shaft and the power shaft in sequence along the radial direction of the transmission shaft, so that the shaft coupling is stably connected with the transmission shaft and the torsion transmission unit. The application optimizes the connection form between the transmission shaft of the photovoltaic tracking support and the power shaft of the torsion transmission unit, effectively improves the shearing capacity of the transmission shaft connection node of the torsion transmission system of the photovoltaic tracking support while ensuring the assembly efficiency, is beneficial to maintaining the long-term and stable operation of the photovoltaic tracking support, and promotes the cost reduction and benefit increase of enterprises.

Description

Technical Field

[0001] This application relates to the field of solar photovoltaic tracking technology, and further to a torque transmission connection structure and a photovoltaic tracking bracket system. Background Technology

[0002] In recent years, adjustable photovoltaic mounting systems have been widely used in various aspects of production and daily life because they can greatly improve the efficiency of photovoltaic modules in capturing solar energy.

[0003] In related technologies, multi-point driven adjustable photovoltaic brackets, such as horizontal single-axis / inclined single-axis tracking brackets, typically have drive shafts or other power transmission modules installed between adjacent drive points to achieve synchronous driving of the main shaft along the corresponding drive points. Currently, most horizontal / inclined single-axis tracking brackets in the industry have hollow tubular structures for their drive shafts and corresponding reducer output shafts. For ease of assembly, a single bolt is usually used to radially penetrate both the drive shaft and the reducer output shaft to achieve the transmission connection between the drive shaft and the output shaft of the active reducer that provides torque, or between the drive shaft and the output shaft of the driven reducer that outputs torque. However, this connection method often results in the bolt breaking or the drive shaft and reducer output shaft being torn due to the shear force acting at the connection between the active / driven reducer output shaft and the drive shaft exceeding the shear strength of the bolt or the corresponding drive shaft / reducer output shaft, leading to the failure of the torque transmission system. Therefore, developing a torque transmission connection structure that is easy to install and has strong shear resistance will have a profound impact on the development of the photovoltaic tracking bracket industry. Utility Model Content

[0004] The purpose of this application is to provide a torque transmission connection structure and a photovoltaic tracking bracket system. By optimizing the connection structure between the drive shaft of the photovoltaic tracking bracket and the power shaft of the torque transmission unit, the shear resistance of the drive shaft connection point of the photovoltaic tracking bracket torque transmission system is significantly improved.

[0005] The technical solution provided in this application is as follows:

[0006] This application provides a torque transmission connection structure, including a transmission shaft, a torque transmission unit, and a coupling. The coupling coaxially connects the transmission shaft and the power shaft of the torque transmission unit along the axial direction of the transmission shaft. The transmission shaft and the power shaft are respectively provided with a first receiving cavity and a second receiving cavity. The coupling includes:

[0007] The main body is disposed within the first or second receiving cavity;

[0008] A connecting structure is provided on the body and passes through the drive shaft and the power shaft in a radial direction to connect the drive shaft and the torque transmission unit. The radial direction is perpendicular to the axial direction of the drive shaft.

[0009] The torque transmission connection structure provided in this application, in practical applications, involves fitting the corresponding transmission shaft and power shaft together according to the radial dimensions of the transmission shaft and the power shaft of the torque transmission unit, and then placing the body of the coupling in a preset position within a first or second receiving cavity with a smaller radial dimension. Finally, by connecting the transmission shaft and the power shaft simultaneously through the transmission shaft in the radial direction, a detachable and stable connection between the transmission shaft of the photovoltaic tracking bracket and the power shaft of the torque transmission unit can be achieved.

[0010] The coupling of this application connects the drive shaft and the power shaft of the torque transmission unit. Compared to related technologies that use bolts to simultaneously penetrate the drive shaft and power shaft radially, the connection structure, with its end extending into the first or second receiving cavity and connected to the main body, has a lower probability of shearing under the same shear force due to the supporting effect of the main body, resulting in a longer service life. Simultaneously, because the main body occupies the deformation space of the drive shaft and / or power shaft within the first or second receiving cavity, the probability of tearing between the drive shaft and power shaft is lower. Therefore, when using the coupling of this application to connect the drive shaft of the photovoltaic tracking bracket and the power shaft of the torque transmission unit, the strength of the connection structure between the drive shaft and power shaft can be effectively improved, significantly enhancing the shear resistance of the drive shaft connection point in the photovoltaic tracking bracket's torque transmission system. This ensures the long-term, reliable operation of the photovoltaic tracking bracket's torque transmission system, extends its service life, and reduces its maintenance costs. Furthermore, the coupling technology of this application is ingeniously conceived, can be formed into various structural forms, is easy to manufacture and use, and is low in cost, thus helping enterprises reduce costs and increase efficiency.

[0011] In some embodiments, there are at least two connection structures, and the at least two connection structures are arranged symmetrically with respect to the body or arranged in a circular array around the body;

[0012] The connecting structure is elastically configured so that it can retract into the body along the radial direction after being compressed, and automatically rebound and protrude again from the outer wall surface of the body after the pressure is removed, so as to pass through the drive shaft and the power shaft sequentially along the radial direction after the drive shaft and the power shaft are interlocked, and connect the drive shaft and the power shaft.

[0013] This application provides a torque transmission connection structure. Because the connection structure is elastically designed, after the main body is placed into the corresponding first or second receiving cavity at a preset position, the connection structure automatically penetrates the drive shaft and / or power shaft based on its own rebound force, achieving rapid assembly of the drive shaft and power shaft. This effectively ensures the assembly efficiency of the torque transmission connection structure, thereby promoting convenient, efficient, and time-saving assembly of the corresponding photovoltaic tracking bracket system. Furthermore, in practical applications, the coupling of this application can be pre-installed on the drive shaft or the power shaft of the torque transmission unit before being transported to the project site. This facilitates transportation and further improves construction efficiency at the project site. Simultaneously, the connection structure extends from the inside to the outside of the corresponding first or second receiving cavity, helping to reduce the probability of the connection structure loosening or falling off relative to the drive shaft and power shaft, effectively improving the structural stability of the torque transmission connection structure.

[0014] Furthermore, compared to related technologies that "only use one bolt to connect the drive shaft and the power shaft of the torque transmission unit", the coupling in this application has at least two connection structures on its body. This effectively increases the load limit that the coupling can withstand, helps to further reduce the probability of torque transmission system failure due to coupling damage, and thus further improves the connection strength and shear resistance of the drive shaft connection point of the photovoltaic tracking bracket torque transmission system.

[0015] In some embodiments, the outer periphery of the body is adapted to the cross-sectional profile of the first or second receiving cavity.

[0016] The torque transmission connection structure provided in this application, in practical applications, sets the outer periphery of the main body to adapt to the cross-sectional profile of the first or second receiving cavity. After the main body of the coupling is located in the first or second receiving cavity with a smaller radial dimension, it can abut against the inner wall surface of the corresponding drive shaft and / or power shaft radially from the corresponding first or second receiving cavity. While supporting the corresponding drive shaft and power shaft from the inside, it fully compresses the space for the drive shaft and power shaft to deform inward, thereby stably reducing the probability of deformation and tearing of the drive shaft and power shaft under shear force, and further improving the structural strength and functional stability of the torque transmission connection structure.

[0017] In some embodiments, the body has a rectangular columnar structure, and there are four connecting structures, which are respectively disposed on the four sides of the body around its perimeter.

[0018] The connecting structure includes a limiting convex shaft, which is cylindrical in shape and its extension and retraction direction is parallel to the radial direction.

[0019] The free end of the limiting convex shaft is an arc surface to form a guiding slope.

[0020] This application provides a torque transmission connection structure in which the cross-section of the coupling body is rectangular. On the one hand, this facilitates the arrangement and installation of the four limiting cams on the body, which helps to improve the production convenience of the coupling. On the other hand, when the body has a rectangular columnar structure, the transmission shaft and the power shaft of the torque transmission unit that are adapted to the body have a square tube structure. In this way, the relative rotation of the transmission shaft and the power shaft around their own axes can be effectively constrained by the geometry of the transmission shaft and the power shaft themselves. This helps to reduce the occurrence of shearing of the limiting cams and / or tearing of the transmission shaft and the power shaft caused by the relative rotation of the two, thereby stably ensuring the connection strength and shear resistance of the transmission shaft connection point of the torque transmission connection structure, i.e., the torque transmission system of the photovoltaic tracking bracket.

[0021] The cylindrical structure of the limiting cam shaft facilitates its adaptation to the retraction requirements in various shear force directions, thereby minimizing the possibility of it jamming relative to the main body and / or drive shaft / power shaft during compression or rebound. Combined with the arc-shaped guide slope at its free end, this effectively ensures its telescopic reset capability and improves the smoothness of the coupling's operation. Simultaneously, it helps prevent the limiting cam shaft from breaking or the drive shaft and / or power shaft from tearing due to localized stress concentration relative to the drive shaft and / or power shaft under shear force, thus reducing the probability of damage to the torque transmission connection structure and effectively extending the service life of the coupling and torque transmission connection structure.

[0022] In some embodiments, the limiting cam is provided with a limiting element for limiting its disengagement from the drive shaft and / or the power shaft.

[0023] This application provides a torque transmission connection structure, in which a limiting member is used to achieve a stable connection between the limiting cam and the transmission shaft and the power shaft of the torque transmission unit, thereby improving the installation stability of the coupling at the connection point of the transmission shaft and the power shaft, and reducing the risk of torque transmission system failure caused by the limiting cam disengaging from the transmission shaft and / or the power shaft.

[0024] In some embodiments, the limiting member includes a spring-loaded latch;

[0025] The spring clips are located at the free end of the limiting convex shaft, and there are at least two spring clips. The at least two spring clips are symmetrically arranged relative to the limiting convex shaft or arranged in a circumferential array around the limiting convex shaft. Each spring clip is elastically arranged so that it can retract into the limiting convex shaft along the radial direction after being squeezed, and automatically rebound and protrude out of the outer wall surface of the limiting convex shaft after the pressure is removed. It is used to extend out of the limiting convex shaft after passing through the drive shaft and the power shaft at the free end of the limiting convex shaft, so as to restrict the free end of the limiting convex shaft from retracting into the first receiving cavity or the second receiving cavity.

[0026] This application provides a torque transmission connection structure that uses a spring clip that extends and retracts radially along the limiting cam to prevent the limiting cam from disengaging from the transmission shaft and / or power shaft. The corresponding limiting structure is simple, reliable, and available in various configurations, making it easy to manufacture and assemble, and further promoting energy conservation and cost reduction for enterprises.

[0027] In some embodiments, the limiting convex shaft has a hollow structure, and a V-shaped spring is installed in its inner cavity;

[0028] The two blades of the V-shaped spring sheet abut against the opposing inner wall surfaces of the inner cavity of the limiting convex shaft;

[0029] Two spring clips are provided, each corresponding to a free end of one of the two blades, and are respectively fixed to the opposite sides of the two blades, so that the free ends of both protrude from the outer wall surface of the limiting convex shaft in the free state.

[0030] This application provides a torque transmission connection structure that uses a V-shaped spring to achieve a retractable setting of the spring buckle relative to the limiting convex shaft. The limiting component has a simple structure, is easy to produce and use, and effectively reduces the cost investment of enterprises in the production of this coupling.

[0031] In some embodiments, the torque transmission unit is a rotary reducer;

[0032] The power shaft of the rotary reducer has a hollow tubular structure, and the shaft end of the power shaft is provided with a first through hole corresponding to the connecting structure.

[0033] The drive shaft has a hollow tubular structure and is coaxially slidably sleeved on the shaft end of the power shaft, and the end of the drive shaft connected to the power shaft has a second through hole corresponding to the connection structure.

[0034] The body of the coupling is coaxially disposed in the second receiving cavity of the power shaft of the rotary reducer, and the free end of the connecting structure passes through the corresponding first through hole and the second through hole in sequence to connect the drive shaft and the power shaft of the rotary reducer along the axial direction of the drive shaft.

[0035] This application provides a torque transmission connection structure in which a transmission shaft is coaxially sleeved on the power shaft of a rotary reducer. While transmitting torque, the transmission shaft has a larger radial dimension, which improves the torsional strength and torsional stiffness of the transmission shaft per unit weight. This also helps the transmission shaft to have better bending stiffness, so as to ensure that the transmission shaft will not sag or vibrate excessively under its own weight and wind load, thereby effectively ensuring the stability and accuracy of the photovoltaic tracking bracket system during operation.

[0036] In some embodiments, both the drive shaft and the power shaft of the rotary reducer are square tube structures.

[0037] This application provides a torque transmission connection structure in which both the transmission shaft and the power shaft of the rotary reducer are square tube structures. By using the geometric shapes of the transmission shaft and the power shaft themselves, the relative rotation of the two around their own axes is constrained. This helps to significantly reduce the probability of relative shearing between the coupling and the transmission shaft and the power shaft during torque transmission, thereby greatly improving the shear resistance and reliability of the corresponding photovoltaic tracking bracket torque transmission system.

[0038] On the other hand, this application also provides a photovoltaic tracking bracket system, including any of the torque transmission connection structures described above.

[0039] Compared with the prior art, the torque transmission connection structure and photovoltaic tracking bracket system provided in this application have the following advantages:

[0040] The torque transmission connection structure provided in this application, in practical applications, involves fitting the corresponding transmission shaft and power shaft together according to the radial dimensions of the transmission shaft and the power shaft of the torque transmission unit, and then placing the body of the coupling in a preset position within a first or second receiving cavity with a smaller radial dimension. Finally, by connecting the transmission shaft and the power shaft simultaneously through the transmission shaft in the radial direction, a detachable and stable connection between the transmission shaft of the photovoltaic tracking bracket and the power shaft of the torque transmission unit can be achieved.

[0041] The coupling of this application connects the drive shaft and the power shaft of the torque transmission unit. Compared with the related technology that uses bolts to simultaneously penetrate the drive shaft and the power shaft radially, the end of the connecting structure extending into the first or second receiving cavity is connected to the body. Due to the supporting effect of the body, the probability of the connecting structure being sheared under the same shear force is lower, resulting in a longer service life. At the same time, since the body occupies the deformation space of the drive shaft and / or the power shaft in the first or second receiving cavity, the probability of tearing of the drive shaft and the power shaft is lower. Thus, when using the coupling of this application to connect the drive shaft of the photovoltaic tracking bracket and the power shaft of the torque transmission unit, the strength of the connection structure between the drive shaft and the power shaft can be effectively improved, significantly enhancing the shear resistance of the drive shaft connection point of the photovoltaic tracking bracket torque transmission system. This ensures the long-term, reliable operation of the photovoltaic tracking bracket torque transmission system, extends its service life, and reduces its maintenance costs. Attached Figure Description

[0042] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of this solution.

[0043] Figure 1 This is an isometric schematic diagram of the embodiment of the torque transmission connection structure, which mainly illustrates the overall configuration of the torque transmission connection structure.

[0044] Figure 2yes Figure 1 The enlarged view in section A is mainly used to show the connection between the drive shaft and the power shaft of the rotary reducer;

[0045] Figure 3 This is a partial cross-sectional view of the embodiment of the present application, which mainly illustrates the torque transmission connection structure;

[0046] Figure 4 yes Figure 3 The enlarged view in section B is mainly used to show the state of the coupling when it is assembled inside the power shaft of the rotary reducer;

[0047] Figure 5 This is an isometric schematic diagram of the main structure of the coupling in the embodiments of this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 100, Drive shaft; 110, First receiving cavity; 120, Second through hole; 200, Torque transmission unit; 210, Rotary reducer; 211, Power shaft; 2111, Second receiving cavity; 2112, First through hole; 220, Motor; 300, Coupling; 310, Body; 320, Connecting structure; 321, Limiting cam; 3211, Guide slope. Detailed Implementation

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0051] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0052] In the field of adjustable photovoltaic (PV) mounting systems, PV tracking brackets significantly improve the power generation efficiency of PV modules by driving them to rotate in real time according to the angle of sunlight. Common examples include flat single-axis and inclined single-axis PV tracking brackets. In related technologies, adjacent drive points on the PV tracking bracket of a PV power plant, such as between two reducers (adjacent driven reducers or adjacent active and driven reducers) in the same row of PV arrays, or between corresponding reducers in two adjacent rows of PV arrays, are typically connected by drive shafts. This allows the torque transmission units (such as reducers), drive shafts, and couplings connecting them to form the torque transmission system of the corresponding PV tracking bracket, achieving synchronous drive of all drive points along the main shaft axis. Furthermore, considering performance, lightweight design, and cost, hollow shafts are typically used for the corresponding drive shafts and reducer output shafts. Therefore, in actual assembly, the corresponding drive shafts and reducer output shafts are often fitted together according to their radial dimensions, and then a bolt is used as a coupling, passing radially through both the drive shaft and the reducer output shaft to achieve coaxial transmission connection. However, this type of connection structure has weak connection strength and shear resistance. It is prone to failure of the torque transmission system due to bolt shearing or tearing of the corresponding drive shaft and reducer output shaft, which affects the operational stability of the corresponding photovoltaic tracking bracket.

[0053] In one embodiment, reference is made to the accompanying drawings. Figures 1 to 5 A torque transmission connection structure is provided, which optimizes the connection structure between the drive shaft 100 of the photovoltaic tracking bracket and the power shaft 211 of the torque transmission unit 200. This significantly improves the connection strength and shear resistance at the connection point while ensuring efficient and convenient assembly of the drive shaft 100 and the corresponding power shaft 211. Specifically, the torque transmission connection structure includes a drive shaft 100, a torque transmission unit 200, and a coupling 300. The coupling 300 coaxially connects the drive shaft 100 and the power shaft 211 of the torque transmission unit 200 along the axial direction of the drive shaft 100. The drive shaft 100 has a first receiving cavity 110, and the power shaft 211 of the torque transmission unit 200 has a second receiving cavity 2111. The coupling 300 includes a body 310 and a connection structure 320 disposed on the body 310, enabling… In use, the main body 310 is placed in the first receiving cavity 110 or the second receiving cavity 2111 with a smaller radial dimension. The drive shaft 100 and the power shaft 211 of the torque transmission unit 200 are coaxially sleeved according to their radial dimensions. Then, the drive shaft 100 and the power shaft 211 are sequentially passed through the connecting structure 320 in the radial direction, that is, in the direction perpendicular to the axis of the drive shaft 100, the drive shaft 100 and the power shaft 211 are sequentially passed through, so that a stable connection between the drive shaft 100 and the torque transmission unit 200 can be achieved.

[0054] With this torque transmission connection structure, since the body 310 is located inside the drive shaft 100 or the power shaft 211 of the torque transmission unit 200, the body 310 radially supports the corresponding drive shaft 100 and / or power shaft 211 from within the corresponding first receiving cavity 110 or second receiving cavity 2111, reducing the probability of inward deformation and tearing of the drive shaft 100 and power shaft 211. Furthermore, the connecting structure 320 extends into one end of the drive shaft 100 and power shaft 211 and connects to the body 310. Under the support of the body 310, the relative... Compared to bolts in related technologies, the connecting structure 320 experiences less force when subjected to the same shear force at the connection point of the torque transmission system of the photovoltaic tracking bracket, thus reducing the probability of shearing. In summary, this effectively extends the service life of the torque transmission connection structure, significantly reduces the probability of torque transmission system failure, stably ensures the connection strength between the corresponding transmission shaft 100 and the power shaft 211 of the corresponding torque transmission unit 200, improves the shear resistance at the connection point, and thus maintains the stable operation of the photovoltaic tracking bracket in the long term. Furthermore, since the torque transmission connection structure can be assembled simply by inserting the body 310 of the coupling 300 into the corresponding transmission shaft 100 or power shaft 211, and then setting the connecting structure 320 to pass through the transmission shaft 100 and power shaft 211, the coupling 300 of this application is convenient to use and easy to operate, which helps ensure the assembly efficiency of the torque transmission connection structure and the corresponding photovoltaic tracking bracket.

[0055] In one embodiment, based on the above embodiments, specifically referring to... Figures 1 to 4 In this embodiment, the mounting axis of the body 310 on the drive shaft 100 or the power shaft 211 of the torque transmission unit 200 is parallel to the axis of the body 310 itself, that is, the axes of the drive shaft 100, the power shaft 211 and the body 310 are parallel or coincident. Furthermore, to accommodate the installation requirements of the coupling 300 within the drive shaft 100 or the power shaft 211 of the torque transmission unit 200, in this embodiment, the body 310 is preferably configured as a columnar structure, and its outer periphery is preferably adapted to the cross-sectional profile of the first receiving cavity 110 or the second receiving cavity 2111. In use, the body 310 is positioned along the axial direction of the drive shaft 100 or the power shaft 211 of the torque transmission unit 200 at a predetermined position within the first receiving cavity 110 or the second receiving cavity 2111, which has a smaller radial dimension, and fully occupies and compresses the inward deformation space of the drive shaft 100 or the power shaft 211, significantly improving the deformation and tearing of the drive shaft 100 or the power shaft 211 after shearing force. (Refer to...) Figures 1 to 5At least two connecting structures 320 are provided on the periphery of the body 310 to disperse the shear force on a single connecting structure 320, reduce the probability of it being sheared, and strengthen the structural strength of the coupling 300 connecting the drive shaft 100 and the power shaft 211 of the torque transmission unit 200. Moreover, in this embodiment, at least two connecting structures 320 are arranged symmetrically about the axis of the body 310 or arranged in a circular array around the axis of the body 310, which can effectively ensure the connection stability between the drive shaft 100 and the torque transmission unit 200.

[0056] Furthermore, in order to improve the assembly efficiency of the drive shaft 100 and the power shaft 211 of the torque transmission unit 200, in this embodiment, any connecting structure 320 is elastically configured so that it can be radially retracted into the body 310 at the corresponding position after being squeezed, and automatically rebound and protrude out of the outer wall of the body 310 after the pressure is removed. During actual assembly, the connecting structure 320 is squeezed until it retracts into the body 310. Then, the body 310 is slid along its own axis and embedded into a preset position in the first receiving cavity 110 or the second receiving cavity 2111 with a smaller radial dimension. After the free end of the connecting structure 320 passes through the corresponding drive shaft 100 or power shaft 211 in a direction perpendicular to the axis of the corresponding drive shaft 100 or power shaft 211, the connecting structure 320 is squeezed again until it retracts into the corresponding drive shaft 100 or power shaft 211. Then, the power shaft 211 or drive shaft 100 with a larger radial dimension is fitted onto the preset position on the outer periphery of the drive shaft 100 or power shaft 211 equipped with the coupling 300. When the free end of the connecting structure 320 passes through both the drive shaft 100 and the power shaft 211, a stable connection between the drive shaft 100 and the torque transmission unit 200 can be achieved.

[0057] With this setup, in actual operation, refer to Figure 3 and Figure 4 The coupling 300 can be assembled into the power shaft 211 of the corresponding drive shaft 100 or torque transmission unit 200 in the factory first. Then, according to actual needs, the corresponding number of pre-assembled couplings 300 and corresponding drive shafts 100 or torque transmission units 200 can be transported to the project site for further assembly, so as to further improve the assembly efficiency of the torque transmission connection structure at the project site.

[0058] In this embodiment, refer to Figure 5Each connecting structure 320 includes a limiting convex shaft 321. Specifically, the extension direction of the axis of each limiting convex shaft 321 is perpendicular to the axis of the body 310, and its extension / retraction direction relative to the body 310 is parallel to its own axis. In this embodiment, each limiting convex shaft 321 has a cylindrical structure to minimize the local stress concentration between itself and the body 310 and / or the transmission shaft 100 and / or the power shaft 211 caused by its shape, which could lead to its own breakage and / or tearing damage to the body 310, transmission shaft 100, and power shaft 211, thereby further extending the service life of the torque transmission connecting structure. In addition, referring to... Figure 5 The free end of any limiting cam 321 has a circular arc surface structure, which is used to form a guide slope 3211 for the auxiliary limiting cam 321 to smoothly pass through the drive shaft 100 and the power shaft 211, further ensuring the efficient assembly of the coupling 300 with the drive shaft 100 and the torque transmission unit 200.

[0059] As is well known, during the operation of a photovoltaic tracking bracket, the coupling 300 of the torque transmission system not only transmits rotational motion, but more importantly, it bears the torque difference between the drive shaft 100 and the power shaft 211 of the adjacent torque transmission unit 200. To further improve the shear resistance of the drive shaft connection points of the photovoltaic tracking bracket's torque transmission system, reference is made to... Figures 1 to 5 This application illustrates the case where the body 310 is configured as a rectangular columnar structure. In this case, the drive shaft 100 and the power shaft 211 of the torque transmission unit 200 adapted to the body 310 are both formed from square tubes of appropriate models. After the body 310 slides and is embedded in the corresponding drive shaft 100 or the power shaft 211 of the torque transmission unit 200 at a preset position along its own length direction, the shear force on the coupling 300 can be significantly reduced due to the geometric constraints. This easily avoids the damage to the coupling 300 caused by the rotation of the drive shaft 100 relative to the power shaft 211 of the torque transmission unit 200, as well as the situation where the coupling 300 rotates relative to the drive shaft 100 and / or the power shaft 211 of the torque transmission unit 200, causing the connecting structure 320 to detach from the drive shaft 100 and / or the corresponding power shaft 211. This stabilizes and improves the connection strength and shear resistance of the torque transmission connection structure.

[0060] Furthermore, preferably, there are four connecting structures 320, which are distributed on the four sides of the body 310. Of course, in this embodiment, two or more connecting structures 320 may also be provided on the outer periphery of the body 310, as long as the stability and reliability of the coupling 300's function and its ease of production are ensured. In this embodiment, the body 310 may also be cylindrical, polygonal, or have other cylindrical shapes to accommodate the first receiving cavity 110 or the second receiving cavity 2111, or the connecting structures 320 may include three, five, six, etc. This application does not limit the cross-sectional shape of the body 310 or the number of connecting structures 320, nor should these be considered as specific limitations on the scope of protection of this application. This embodiment only uses the coupling 300, which includes a rectangular columnar body 310 and four connecting structures 320 thereon, as an example to illustrate the technical solution of this application in detail.

[0061] In addition, preferably, in this embodiment, the limiting cam 321 is also provided with a limiting member (not shown in the accompanying drawings). The limiting member is used to restrict the limiting cam 321 from disengaging from the drive shaft 100 and / or the power shaft 211 of the torque transmission unit 200, so as to stably ensure the reliability of the coupling 300 in connecting the drive shaft 100 and the corresponding power shaft 211.

[0062] For example, when the coupling 300 is assembled between the drive shaft 100 and the power shaft 211 of the torque transmission unit 200, and the free end of the limiting cam 321 can extend out of the outer wall surface of the drive shaft 100 and the corresponding power shaft 211, in the embodiments of this application, the limiting member can be a plurality of spring buckles installed on the free end of the limiting cam 321. The spring buckles can be radially retracted into the limiting cam 321 at the corresponding position after being squeezed, and automatically spring back and protrude out of the outer wall surface of the limiting cam 321 after the pressure is removed. In practical applications, in the initial state, the spring clip is set to retract into the corresponding limiting protrusion 321. The limiting protrusion 321 is pressed to retract into the body 310. After the body 310 is installed into the preset position in the first receiving cavity 110 or the second receiving cavity 2111, and the free end of the limiting protrusion 321 extends out of the outer wall surface of the drive shaft 100 and the corresponding power shaft 211, the spring clip is released, so that the free end of the spring clip protrudes out of the outer wall surface of the corresponding limiting protrusion 321. This restricts the free end of the limiting protrusion 321 from retracting into the first receiving cavity 110 or the second receiving cavity 2111, thereby effectively preventing the limiting protrusion 321 from disengaging from the drive shaft 100 and / or the corresponding power shaft 211, and thus achieving a stable connection between the drive shaft 100 and the power shaft 211 of the torque transmission unit 200.

[0063] Furthermore, in this embodiment, each limiting protrusion 321 preferably includes at least two spring clips, and the at least two spring clips are symmetrically arranged about the axis of the limiting protrusion 321, or arranged in a circular array around the axis of the limiting protrusion 321 on the peripheral wall of the limiting protrusion 321. Taking the provision of two spring clips on each limiting protrusion 321 as an example, in actual production, it is preferable that the limiting protrusion 321 has a hollow structure and that a V-shaped spring is installed in its inner cavity to support the spring clips, thereby realizing the above solution.

[0064] Specifically, the V-shaped spring includes two blades connected at one end. A spring clip is located at the free end of each blade and corresponds one-to-one with the two blades of the V-shaped spring. Simultaneously, each spring clip is fixedly installed on the side of the corresponding blade facing away from the other blade. During assembly, the connecting end of the two blades of the V-shaped spring is fixed to the central axis of the free end of the limiting cam 321, keeping the opposing sides of the two blades pressed against the opposing walls of the inner cavity of the limiting cam 321. This allows the free end of the spring clip to penetrate the corresponding through hole on the limiting cam 321 and protrude from the outer wall of the limiting cam 321 in a free state. Of course, the spring clip can also be supported on the limiting cam 321 by springs or other elastic structures, which will not be elaborated upon in this embodiment. In this embodiment, a detachably connected locking block or other structure relative to the limiting cam 321 can also be provided to replace the spring clip, achieving a stable connection between the coupling and the power shaft 211 of the torque transmission unit 200. Since these are existing technologies, they will not be elaborated upon here.

[0065] The technical solution of this application will be further described in detail below, taking the specific connection scenario between the drive shaft 100 of the photovoltaic tracking bracket and the power shaft 211 of the torque transmission unit 200 as an example. In one embodiment, referring to... Figures 1 to 5 A torque transmission connection structure is provided, comprising the transmission shaft 100, torque transmission unit 200, and coupling 300 as described in any of the above embodiments, wherein, referring to... Figure 1 and Figure 3 The torque transmission unit 200 is preferably configured as a combination of a rotary reducer 210 and a motor 220. The power shaft 211 of the rotary reducer 210 extends out of the housing of the rotary reducer 210 and is coaxially connected to the transmission shaft 100 through a coupling 300.

[0066] Specifically, refer to Figure 3 and Figure 4 The power shaft 211 of the rotary reducer 210 has a hollow tubular structure, and one end of it connecting to the transmission shaft 100 has a first through hole 2112 corresponding to the connecting structure 320; correspondingly, refer to Figure 1 and Figure 2The drive shaft 100, which is adapted to the power shaft 211 of the rotary reducer 210, also has a hollow tubular structure, and the end of the drive shaft 211 connected to the rotary reducer 210 has a second through hole 120 corresponding to the connecting structure 320. During actual assembly, the connecting structure 320 is pressed until its free end retracts into the body 310. The body 310 of the coupling 300 is then coaxially slidably embedded into the second receiving cavity 2111 of the power shaft 211 of the rotary reducer 210. After the connecting structure 320 is aligned with the first through hole 2112, it extends outward from the inside to the corresponding first through hole 2112, thus assembling the coupling 300. The drive shaft 100 is installed on the power shaft 211 of the rotary reducer 210. Then, the connecting structure 320 is pressed until its free end retracts into the first through hole 2112 of the power shaft 211 of the rotary reducer 210. The drive shaft 100 is then coaxially slidably sleeved onto the shaft end of the corresponding power shaft 211 until the second through hole 120 is aligned with the first through hole 2112. The free end of the connecting structure 320 passes through the corresponding first through hole 2112 and second through hole 120 in sequence, thus stably connecting the drive shaft 100 and the power shaft 211 of the rotary reducer 210 along the axial direction, thereby realizing the assembly of the torque transmission connecting structure.

[0067] Based on the above embodiments, and referring to Figures 1 to 5 In this embodiment, the power shaft 211 and transmission shaft 100 of the rotary reducer 210 are preferably square tube structures, and the first through hole 2112 and the second through hole 120 are each set with four corresponding limiting cams 321.

[0068] The torque transmission system of the photovoltaic tracking bracket, set up in this way, features a simple coupling 300 structure for the torque transmission connection. This coupling provides a stable and reliable connection between the drive shaft 100 and the power shaft 211 of the torque transmission unit 200, making it less susceptible to damage under shear forces during operation. It also enhances the deformation resistance of the drive shaft 100 and the power shaft 211 of the torque transmission unit 200. While enabling convenient and efficient assembly of the photovoltaic tracking bracket, this significantly improves the structural strength and shear resistance at the connection node of the drive shaft 100 in the torque transmission system. This helps save costs for enterprises in the operation and maintenance of the photovoltaic tracking bracket's torque transmission system, maintains the long-term and stable operation of the photovoltaic tracking bracket, and effectively promotes cost reduction and efficiency improvement for enterprises.

[0069] In summary, this application forms a coupling 300 by combining an elastic connection structure on a columnar body 310. By setting the drive shaft 100 of the photovoltaic tracking bracket and the power shaft 211 of the rotary reducer 210 to be hollow tube structures, the body 310 of the coupling 300 slides along the axial direction of the power shaft 211 of the rotary reducer 210 and is embedded in a preset position in the first receiving cavity 110. After the drive shaft 100 is coaxially sleeved on a preset position on the outer periphery of the power shaft 211, the connection structure 320 automatically passes through the power shaft 211 radially. With the drive shaft 100, and the body 310 radially abutting against the inner wall of the power shaft 211 from the first receiving cavity 110, the assembly efficiency of the drive shaft 100 of the photovoltaic tracking bracket and the power shaft 211 of the torque transmission unit 200 is ensured, while improving the bending resistance of the connection structure 320 and the deformation resistance of the drive shaft 100 and the power shaft 211. This significantly improves the structural strength and shear resistance of the connection point of the drive shaft 100 of the photovoltaic tracking bracket torque transmission system and extends the service life of the torque transmission connection structure.

[0070] In this application, when there is a torque difference or misalignment deformation between the drive shaft 100 at both ends of the coupling 300 and the power shaft 211 of the rotary reducer 210, the drive shaft 100 and the power shaft 211 of the rotary reducer 210 rotate or deviate slightly relative to each other. At the same time, the compression connection structure 320 retracts slightly without disengaging from the drive shaft 100. This gives the coupling 300 a certain degree of self-adjustment and misalignment compensation capability, thereby avoiding the direct failure of the corresponding torque transmission connection structure. This helps to further improve the reliability of the corresponding torque transmission system, extend its service life, and thus maintain the reliable operation of the photovoltaic tracking bracket system for a long time.

[0071] The main body 310 of the coupling 300 in this application has a rectangular columnar structure, and the power shaft 211 and transmission shaft 100 of the rotary reducer 210 are both square tube structures. This reduces the difficulty of arranging the connecting structure 320 on the main body 310, and effectively avoids the situation where the connecting structure 320 detaches from the transmission shaft 100 due to the relative rotation between the transmission shaft 100 and the power shaft 211, which would cause the torque transmission system to fail. This ensures a stable and reliable connection between the transmission shaft 100 and the power shaft 211 of the rotary reducer 210, and helps enterprises reduce costs and increase efficiency.

[0072] Of course, in one embodiment, a photovoltaic tracking bracket system may also be provided, including the torque transmission connection structure described in any of the above embodiments.

[0073] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A torque transmission connection structure, comprising a transmission shaft, a torque transmission unit, and a coupling, wherein the coupling coaxially connects the transmission shaft and the power shaft of the torque transmission unit along the axial direction of the transmission shaft, and the transmission shaft and the power shaft are respectively provided with a first receiving cavity and a second receiving cavity, characterized in that, The coupling includes: The main body is disposed within the first or second receiving cavity; A connecting structure is provided on the body and passes through the drive shaft and the power shaft in a radial direction to connect the drive shaft and the torque transmission unit. The radial direction is perpendicular to the axial direction of the drive shaft.

2. The torque transmission connection structure according to claim 1, characterized in that, There are at least two connection structures, and the at least two connection structures are arranged symmetrically with respect to the body or arranged in a circular array around the body. The connecting structure is elastically configured so that it can retract into the body along the radial direction after being compressed, and automatically rebound and protrude again from the outer wall surface of the body after the pressure is removed, so as to pass through the drive shaft and the power shaft sequentially along the radial direction after the drive shaft and the power shaft are nested together, and connect the drive shaft and the power shaft.

3. The torque transmission connection structure according to claim 2, characterized in that, The outer periphery of the body is adapted to the cross-sectional profile of the first or second receiving cavity.

4. A torque transmission connection structure according to claim 2 or 3, characterized in that, The main body has a rectangular columnar structure, and there are four connecting structures, which are respectively located on the four sides of the main body around its perimeter. The connecting structure includes a limiting convex shaft, which is cylindrical in shape and its extension and retraction direction is parallel to the radial direction. The free end of the limiting convex shaft is an arc surface to form a guiding slope.

5. The torque transmission connection structure according to claim 4, characterized in that, The limiting cam is provided with a limiting member for preventing itself from disengaging from the transmission shaft and / or the power shaft.

6. The torque transmission connection structure according to claim 5, characterized in that, The limiting component includes a spring-loaded buckle; The spring clips are located at the free end of the limiting convex shaft, and there are at least two spring clips. The at least two spring clips are symmetrically arranged relative to the limiting convex shaft or arranged in a circumferential array around the limiting convex shaft. Each spring clip is elastically arranged so that it can retract into the limiting convex shaft radially after being squeezed, and automatically rebound and protrude out of the outer wall surface of the limiting convex shaft after the pressure is removed. It is used to extend out of the limiting convex shaft after passing through the drive shaft and the power shaft at the free end of the limiting convex shaft, so as to restrict the free end of the limiting convex shaft from retracting into the first receiving cavity or the second receiving cavity.

7. The torque transmission connection structure according to claim 6, characterized in that, The limiting convex shaft has a hollow structure, and a V-shaped spring is installed in its inner cavity; The two blades of the V-shaped spring sheet abut against the opposing inner wall surfaces of the inner cavity of the limiting convex shaft; Two spring clips are provided, each corresponding to a free end of one of the two blades, and are respectively fixed to the opposite sides of the two blades, so that the free ends of both protrude from the outer wall surface of the limiting convex shaft in the free state.

8. The torque transmission connection structure according to claim 1, characterized in that, The torque transmission unit is a rotary reducer; The power shaft of the rotary reducer has a hollow tubular structure, and the shaft end of the power shaft is provided with a first through hole corresponding to the connecting structure. The drive shaft has a hollow tubular structure and is coaxially slidably sleeved on the shaft end of the power shaft, and the end of the drive shaft connected to the power shaft has a second through hole corresponding to the connection structure. The body of the coupling is coaxially disposed in the second receiving cavity of the power shaft of the rotary reducer, and the free end of the connecting structure passes through the corresponding first through hole and the second through hole in sequence to connect the drive shaft and the power shaft of the rotary reducer along the axial direction of the drive shaft.

9. A torque transmission connection structure according to claim 8, characterized in that, Both the drive shaft and the power shaft of the rotary reducer are square tube structures.

10. A photovoltaic tracking bracket system, characterized in that, Includes the torque transmission connection structure as described in any one of claims 1 to 9.

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