Speed reducer and shaft structure therein

Abstract

The application relates to a speed reducer and a middle shaft structure thereof. The middle shaft structure of the speed reducer comprises a rotating adjusting piece, an extension assembly and a barrel. In the process of installing the middle shaft structure of the speed reducer into the main beam of a photovoltaic assembly, the extension assembly is moved close to the axis of the barrel through the cooperation between the rotating adjusting piece and the extension assembly, the middle shaft structure of the speed reducer is put into the main beam of the photovoltaic assembly, the extension assembly is moved away from the axis of the barrel through the cooperation between the rotating adjusting piece and the extension assembly, and the extension assembly is matched with the inner wall of the main beam, the outer diameter of the middle shaft structure of the speed reducer is matched with the inner diameter of the main beam, the middle shaft structure of the speed reducer is driven by a driving mechanism to drive the main beam to rotate, and the photovoltaic assembly is kept facing the sun. The middle shaft structure of the speed reducer can be mass-produced to be suitable for main beams with different inner diameters, the problem that the middle shaft structure of the speed reducer is not matched with the main beam due to size errors is avoided, the installation efficiency is improved, and the production and installation costs are reduced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic equipment technology, and in particular to a speed reducer and its central shaft structure. Background Technology

[0002] Photovoltaic power generation systems can effectively reduce carbon emissions and have become a widely used power generation method. Photovoltaic tracking brackets use a speed reducer to drive the main beam or shaft to rotate, ensuring the photovoltaic modules always face the sun and significantly improving power generation efficiency. The speed reducer is connected to the main beam of the bracket and transmits torque through its central shaft.

[0003] The diverse wall thicknesses (2.0-4.0 mm) of main beams used in different projects and zones (inner and outer perimeters) result in a large range in the outer diameter of the main beams. Traditional reducers have fixed outer diameter shafts, meaning a single shaft size can only match a main beam with a specific inner diameter. Furthermore, to accommodate different pipe diameters, reducers require the production of shafts in various specifications, increasing the complexity and cost of design, production, inventory, and supply chain management. If a reducer shaft that doesn't match the main beam's inner diameter is used incorrectly during on-site installation, the reducer must be replaced with a new one from the manufacturer, increasing installation time and delivery costs. Utility Model Content

[0004] Based on this, it is necessary to address the issue that the outer diameter of the central shaft of traditional reducers is a fixed size, and the same central shaft size can only match the main beam with a specific inner diameter. Moreover, in order to adapt to different pipe diameters, reducers need to produce central shafts of various specifications, which increases the complexity and cost of design, production, inventory and supply chain management. If a reducer central shaft that does not match the inner diameter of the main beam is used incorrectly during on-site installation, the reducer needs to be replaced with a new one from the manufacturer, increasing installation time and delivery costs. Therefore, it is necessary to provide a reducer and its central shaft structure.

[0005] A shaft structure for a speed reducer, the shaft structure comprising:

[0006] cylindrical body;

[0007] Telescopic assembly, wherein the telescopic assembly portion is located within the cylinder and extends beyond the cylinder; and

[0008] A rotating adjustment component is provided, which passes through the telescopic assembly and is connected to the telescopic assembly to enable the telescopic assembly to extend and retract radially along the cylinder and adapt to the inner wall of the main beam.

[0009] During the installation of the aforementioned reducer's central shaft structure with the main beam of the photovoltaic module, the telescopic component is first brought closer to the axis of the cylinder through the cooperation between the rotating adjustment component and the telescopic component. Then, the entire reducer's central shaft structure is placed inside the main beam of the photovoltaic module. Subsequently, the telescopic component is moved away from or closer to the axis of the cylinder through the cooperation between the rotating adjustment component and the telescopic component, adapting it to the inner wall of the main beam. This adapts the outer diameter of the reducer's central shaft structure to the inner diameter of the main beam. The drive mechanism then drives the reducer's central shaft structure to rotate the main beam, thereby turning the photovoltaic module to ensure it always faces the sun. This reducer's central shaft structure can be mass-produced to accommodate main beams of different inner diameters, avoiding mismatches between the reducer's central shaft structure and the main beam due to dimensional errors, improving installation efficiency, and reducing production and installation costs.

[0010] In one embodiment, the telescopic assembly includes a first telescopic structure and a second telescopic structure, wherein the first telescopic structure and the second telescopic structure are partially located inside the cylinder and extend out of the cylinder;

[0011] The rotation adjustment component is sequentially inserted into the first telescopic structure and the second telescopic structure;

[0012] The rotating adjustment component is simultaneously connected to both the first telescopic structure and the second telescopic structure, so that the first telescopic structure and the second telescopic structure can extend and retract radially along the cylinder and adapt to the inner wall of the main beam.

[0013] In one embodiment, the first telescopic structure includes: a first rotating member, a plurality of first telescopic members, and a plurality of first supporting members;

[0014] Multiple first telescopic components and multiple first support components are one-to-one. Multiple first telescopic components are evenly arranged around the circumference of the first rotating component. The first telescopic components pass through the cylinder and are connected to the corresponding first support component. The first rotating component cooperates with one end of the first telescopic component. The rotation adjustment component cooperates with the first rotating component to drive the first rotating component to rotate. The first rotating component drives the first telescopic component to extend and retract radially along the cylinder and adapt to the inner wall of the main beam.

[0015] In one embodiment, the first telescopic member includes a first mating part and a first connecting part that are connected to each other;

[0016] The first rotating member engages with the end of the first mating part that is away from the first connecting part, so as to drive the first telescopic member to extend and retract radially along the cylinder.

[0017] The first connecting part passes through the cylinder and is connected to the first support member.

[0018] In one embodiment, the second telescopic structure includes: a second rotating member, a plurality of second telescopic members, and a plurality of second supporting members;

[0019] Multiple second telescopic components and multiple second support components correspond one-to-one. Multiple second telescopic components are evenly arranged around the circumference of the second rotating component. The second telescopic components pass through the cylinder and are connected to the corresponding second support components. The second rotating component cooperates with one end of the second telescopic component. The rotation adjustment component cooperates with the second rotating component to drive the second rotating component to rotate. The second rotating component drives the second telescopic component to extend and retract radially along the cylinder and adapt to the inner wall of the main beam.

[0020] In one embodiment, the second telescopic member includes a second mating part and a second connecting part that are connected to each other;

[0021] The second rotating member engages with the end of the second mating part that is away from the second connecting part, so as to drive the second telescopic member to extend and retract radially along the cylinder;

[0022] The second connecting part passes through the cylinder and is connected to the second support member.

[0023] In one embodiment, the first rotating member and the second rotating member are arranged along the axis of the cylinder;

[0024] The rotation adjustment component, the first rotation component, the second rotation component, and the cylinder are coaxially arranged;

[0025] The rotation adjustment component is sequentially inserted through the first rotating component and the second rotating component and is simultaneously connected to the first rotating component and the second rotating component;

[0026] Multiple first support members and multiple second support members are arranged sequentially at intervals along the circumference of the cylinder.

[0027] In one embodiment, the cylinder includes a cylinder wall and a fixing member, the fixing member and the telescopic assembly are disposed inside the cylinder wall, and the first telescopic member and the second telescopic member pass through the cylinder wall;

[0028] The rotating adjustment component passes through the fixing component and rotates in coordination with the fixing component.

[0029] In one embodiment, both the first rotating member and the second rotating member are gears, and both the first telescopic member and the second telescopic member are provided with racks on the side near the axis of the cylinder. The first telescopic member meshes with the first rotating member, and the second telescopic member meshes with the second rotating member.

[0030] One embodiment of this application also provides a speed reducer, the speed reducer including: a drive mechanism and a central shaft structure of the speed reducer;

[0031] The drive mechanism is connected to the cylinder to drive the cylinder to rotate.

[0032] During the installation of the aforementioned speed reducer with the main beam of the photovoltaic module, the telescopic component is first brought closer to the axis of the cylinder through the cooperation between the rotating adjustment component and the telescopic component. Then, the entire central shaft structure of the speed reducer is placed inside the main beam of the photovoltaic module. Subsequently, the telescopic component is moved away from or closer to the axis of the cylinder through the cooperation between the rotating adjustment component and the telescopic component, adapting it to the inner wall of the main beam. This adapts the outer diameter of the speed reducer's central shaft structure to the inner diameter of the main beam. The drive mechanism then drives the cylinder to rotate, thereby rotating the main beam and turning the photovoltaic module to ensure it always faces the sun. The aforementioned central shaft structure of the speed reducer can support mass production to accommodate main beams of different inner diameters, avoiding mismatches between the speed reducer's central shaft structure and the main beam due to dimensional errors, improving installation efficiency, and reducing production and installation costs. Attached Figure Description

[0033] Figure 1 This is an exploded view of the central shaft structure of a speed reducer according to one embodiment.

[0034] Figure 2 for Figure 1 A schematic diagram of the first telescopic structure.

[0035] Figure 3 for Figure 1 A schematic diagram of the second telescopic structure.

[0036] Figure 4 for Figure 1 A schematic diagram of the middle cylinder.

[0037] Figure 5 This is a schematic diagram of the retraction of the telescopic component in the central shaft structure of a speed reducer according to one embodiment.

[0038] Figure 6 for Figure 5 A schematic diagram showing the extension of the telescopic component in the central shaft structure of the reducer.

[0039] Explanation of icon numbers:

[0040] 10-The central shaft structure of the reducer;

[0041] 100 - Rotation adjustment part; 110 - Head; 120 - Rod part; 121 - Snap-fit ​​part; 122 - Threaded part;

[0042] 200 - Telescopic assembly;

[0043] 300 - Cylinder body; 310 - Cylinder wall; 310a - First through hole; 310b - Second through hole; 310c - Second fastening hole; 320 - Fastener; 320a - Rotation hole;

[0044] 400 - First telescopic structure; 410 - First rotating component; 410a - First hole; 420 - First telescopic component; 421 - First mating part; 422 - First connecting part; 423 - First turning part; 423a - First insertion hole; 430 - First support component; 430a - First fastening hole;

[0045] 500 - Second telescopic structure; 510 - Second rotating member; 510a - Second hole; 520 - Second telescopic member; 521 - Second mating part; 522 - Second connecting part; 523 - Second turning part; 524 - Bending part; 525 - Extension part; 525a - Second insertion hole; 530 - Second support member;

[0046] 600 - rack; 610 - convex rib. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0048] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0053] See Figure 1 and Figure 5 , Figure 5 A schematic diagram of the retracted telescopic component 200 of the central shaft structure 10 of a speed reducer according to an embodiment is shown. The central shaft structure 10 of the speed reducer provided in one embodiment of this application includes: a rotation adjustment member 100, a telescopic component 200, and a cylinder 300.

[0054] In the aforementioned reducer's central shaft structure 10, the telescopic component 200 is partially located inside the cylinder 300 and extends out of the cylinder 300. The rotation adjustment component 100 passes through the telescopic component 200 and is connected to it so that the telescopic component 200 can extend and retract radially along the cylinder 300 and adapt to the inner wall of the main beam.

[0055] During the installation of the aforementioned reducer's central shaft structure 10 with the main beam of the photovoltaic module, the telescopic component 200 is first brought closer to the axis of the cylinder 300 through the cooperation between the rotating adjusting component 100 and the telescopic component 200. Figure 5 Then, the entire central shaft structure 10 of the reducer is placed inside the main beam of the photovoltaic module. Subsequently, by rotating the adjusting component 100 and the telescopic component 200, the telescopic component 200 is moved away from or closer to the axis of the cylinder 300 and adapted to the inner wall of the main beam, thereby adapting the outer diameter of the central shaft structure 10 of the reducer to the inner diameter of the main beam. Figure 6 The drive mechanism then drives the central shaft structure 10 of the reducer to rotate the main beam, thereby turning the photovoltaic module to keep it always facing the sun. The central shaft structure 10 of the reducer can be mass-produced to fit main beams with different inner diameters, avoiding mismatches between the central shaft structure 10 and the main beam due to dimensional errors, thus improving installation efficiency and reducing production and installation costs.

[0056] See Figure 1 In one embodiment, the telescopic assembly 200 includes a first telescopic structure 400 and a second telescopic structure 500, with portions of the first telescopic structure 400 and the second telescopic structure 500 located within and extending out of the cylinder 300. A rotation adjustment member 100 is sequentially inserted through the first telescopic structure 400 and the second telescopic structure 500. The rotation adjustment member 100 simultaneously engages with the first telescopic structure 400 and the second telescopic structure 500 to allow the first telescopic structure 400 and the second telescopic structure 500 to extend and retract radially along the cylinder 300 and adapt to the inner wall of the main beam.

[0057] Because the telescopic component 200 will change its outer diameter during the contraction and extension process, when a set of components is telescopic, it only abuts against the inner wall of the main beam. Therefore, after the outer diameter of the first telescopic structure 400 expands, it abuts against the inner wall of the main beam. After the outer diameter of the second telescopic structure 500 expands, it makes up for the part that the first telescopic structure 400 did not abut against, thereby fully supporting the inner wall of the main beam and making the main beam more stable.

[0058] See Figure 1 and Figure 2In one embodiment, the first telescopic structure 400 includes: a first rotating member 410, a plurality of first telescopic members 420, and a plurality of first supporting members 430. The plurality of first telescopic members 420 and the plurality of first supporting members 430 correspond one-to-one. The plurality of first telescopic members 420 are evenly arranged around the circumference of the first rotating member 410. The first telescopic members 420 pass through the cylinder 300 and are connected to the corresponding first supporting members 430. The first rotating member 410 engages with one end of the first telescopic member 420. A rotation adjustment member 100 engages with the first rotating member 410 to drive the first rotating member 410 to rotate. The first rotating member 410 drives the first telescopic member 420 to extend and retract radially along the cylinder 300 and adapt to the inner wall of the main beam.

[0059] In this embodiment, the first rotating member 410 is rotated by the cooperation of the rotating adjustment member 100 and the first rotating member 410. The first rotating member 410 drives the first telescopic member 420 to extend and retract radially along the cylinder 300, thereby driving the first support member 430 to extend and retract radially along the cylinder 300. The first support member 430 abuts against and adapts to the inner wall of the cylinder 300. Multiple first support members 430 are evenly arranged around the circumference of the cylinder 300 to maintain uniform contact with the inner wall of the main beam.

[0060] See Figure 1 and Figure 2 In one embodiment, the first telescopic member 420 includes a first mating portion 421 and a first connecting portion 422 connected together. A first rotating member 410 engages with the end of the first mating portion 421 opposite to the first connecting portion 422, thereby driving the first telescopic member 420 to extend and retract radially along the cylinder 300. The first connecting portion 422 passes through the cylinder 300 and is connected to the first support member 430.

[0061] In this embodiment, the first connecting portion 422 passes through the cylinder 300, thereby connecting the first mating portion 421 inside the cylinder 300 and the first support member 430 outside the cylinder 300. This allows the first rotating member 410 inside the cylinder 300 to rotate, which in turn drives the first support member 430 outside the cylinder 300 to move radially along the cylinder 300 to fit against the inner wall of the main beam via the first telescopic member 420. Specifically, the cylinder 300 has multiple first through holes 310a, and the multiple first connecting portions 422 pass through the first through holes 310a one by one.

[0062] Preferably, the first telescopic member 420 includes two first connecting parts 422, which stably connect the first support member 430 and the first mating part 421, thereby enabling the first support member 430 to move stably during the radial movement of the first telescopic member 420 along the cylinder 300.

[0063] See Figure 1 and Figure 3In one embodiment, the second telescopic structure 500 includes: a second rotating member 510, a plurality of second telescopic members 520, and a plurality of second supporting members 530. The plurality of second telescopic members 520 and the plurality of second supporting members 530 correspond one-to-one. The plurality of second telescopic members 520 are evenly arranged around the circumference of the second rotating member 510. The second telescopic members 520 pass through the cylinder 300 and are connected to the corresponding second supporting members 530. One end of the second rotating member 510 engages with one end of the second telescopic member 520. A rotation adjustment member 100 engages with the second rotating member 510 to drive the second rotating member 510 to rotate. The second rotating member 510 drives the second telescopic members 520 to extend and retract radially along the cylinder 300 and adapt to the inner wall of the main beam.

[0064] In this embodiment, the rotating adjustment member 100 cooperates with the second rotating member 510 to drive the second rotating member 510 to rotate. The second rotating member 510 drives the second telescopic member 520 to extend and retract radially along the cylinder 300, thereby driving the second support member 530 to extend and retract radially along the cylinder 300. The second support member 530 abuts against and adapts to the inner wall of the cylinder 300. Multiple second support members 530 are evenly arranged around the circumference of the cylinder 300 to maintain uniform contact with the inner wall of the main beam.

[0065] See Figure 1 and Figure 3 In one embodiment, the second telescopic member 520 includes a second mating portion 521 and a second connecting portion 522 connected together. The second rotating member 510 engages with one end of the second mating portion 521 opposite to the second connecting portion 522, thereby driving the second telescopic member 520 to extend and retract radially along the cylinder 300. The second connecting portion 522 passes through the cylinder 300 and is connected to the second support member 530.

[0066] In this embodiment, the second connecting portion 522 passes through the cylinder 300, thereby connecting the second mating portion 521 inside the cylinder 300 and the second support member 530 outside the cylinder 300. This allows the second rotating member 510 inside the cylinder 300 to rotate, and through the second telescopic member 520, drive the second support member 530 outside the cylinder 300 to move radially along the cylinder 300 to fit against the inner wall of the main beam. Specifically, the cylinder 300 has a plurality of second through holes 310b, and the plurality of second connecting portions 522 pass through the second through holes 310b one by one.

[0067] Preferably, the second telescopic member 520 includes two second connecting parts 522, which stably connect the second support member 530 and the second mating part 521, thereby enabling the second support member 530 to move stably during the radial movement of the second telescopic member 520 along the cylinder 300.

[0068] See Figure 1 and Figure 5In one embodiment, the first rotating member 410 and the second rotating member 510 are arranged along the axis of the cylinder 300. The rotation adjustment member 100, the first rotating member 410, the second rotating member 510, and the cylinder 300 are coaxially arranged. The rotation adjustment member 100 passes through the first rotating member 410 and the second rotating member 510 in sequence and is simultaneously connected to the first rotating member 410 and the second rotating member 510. A plurality of first support members 430 and a plurality of second support members 530 are arranged at intervals along the circumference of the cylinder 300, so that the same number of first support members 430 and second support members 530 are arranged at intervals to stably abut against the inner wall of the main beam, and the second support members 530 fill the gap between two first support members 430, thereby making the abutment support of the reducer's central shaft structure 10 against the main beam more stable.

[0069] Specifically, the first telescopic member 420 further includes a first turning portion 423, the two ends of which are respectively connected to the first mating portion 421 and the first connecting portion 422, and the first turning portion 423 and the first mating portion 421 are arranged at an angle. The second telescopic member 520 further includes a second turning portion 523, the two ends of which are respectively connected to the second mating portion 521 and the second connecting portion 522, and the second turning portion 523 and the second mating portion 521 are arranged at an angle. The first turning portion 423 has a first insertion hole 423a, the first connecting portion 422 is inserted into the first insertion hole 423a and fixed by a first pin, and the extension portion 525 has a second insertion hole 525a, the second connecting portion 522 is inserted into the second insertion hole 525a and fixed by a second pin, thereby facilitating the disassembly of the first support member 430 and the second support member 530 so that the first connecting member and the second connecting member can pass through the cylinder wall 310.

[0070] In this application, the first turning part 423 is perpendicularly arranged to the first mating part 421. The first mating part 421 extends radially along the cylinder 300. The end of the first connecting part 422 away from the first support member 430 is connected to the side of the first turning part 423 away from the axis of the cylinder 300. The second turning part 523 is arranged at an obtuse angle to the second mating part 521. The second turning part 523 includes a bending part 524 and an extension part 525. The bending part 524 is connected to the extension part 525 at an obtuse angle. The bending part 524 is connected to the second mating part 521 at an obtuse angle. The extension part 525 and the second mating part 521 both extend radially along the cylinder 300, i.e., are arranged parallel to each other. The second connecting part 522 is connected to the end of the extension part 525 away from the bending part 524. The cylindrical body 300 is square, with chamfered corners at all four circumferences. Therefore, the first support member 430 is a flat plate or block. The first telescopic structure 400 includes four first support members 430, and the second telescopic structure 500 includes four second support members 530. This allows the four first support members 430 to extend and retract vertically and horizontally along the square cylindrical body 300, adapting to the four planar inner walls of the square, chamfered main beam. The second support members 530 are curved plates, with their two sides adapting to the chamfers of the main beam and the cylindrical body 300, respectively. The four second support members 530 abut against the inner walls of the four chamfered corners of the main beam. The four first support members 430 and the four second support members 530 are arranged alternately around the circumference of the cylindrical body 300. The cylinder 300 is provided with eight protrusions 610 in the circumferential direction. The protrusions 610 extend along the axis of the cylinder 300. The space between two adjacent protrusions 610 is used to accommodate the first support member 430 or the second support member 530. The height of the protrusions 610 in the radial direction of the cylinder 300, the thickness of the first support member 430, and the thickness of the second support member 530 are all equal.

[0071] See Figure 1 and Figure 4 In one embodiment, the cylinder 300 includes a cylinder wall 310 and a fixing member 320. The fixing member 320 and the telescopic assembly 200 are disposed inside the cylinder wall 310. The first telescopic member 420 and the second telescopic member 520 pass through the cylinder wall 310. The rotation adjustment member 100 passes through the fixing member 320 and rotatably engages with the fixing member 320. Thus, the fixing member 320, the first rotating member 410, and the second rotating member 510 support the rotation adjustment member 100. After passing through the first rotating member 410 and the second rotating member 510, the rotation adjustment member 100 rotatably engages with the rotation hole 320a opened on the inner wall of the fixing member 320. The rotation adjustment member 100 is relatively fixed to the first rotating member 410 and the second rotating member 510, so that the rotation of the rotation adjustment member 100 relative to the cylinder 300 drives the first rotating member 410 and the second rotating member 510 to rotate relative to the cylinder 300.

[0072] See Figure 1 , Figure 2 as well as Figure 3 In one embodiment, both the first rotating member 410 and the second rotating member 510 are gears. Both the first telescopic member 420 and the second telescopic member 520 have racks 600 on their sides near the axis of the cylinder 300. The first telescopic member 420 meshes with the first rotating member 410, and the second telescopic member 520 meshes with the second rotating member 510. The first rotating member 410 has a first hole 410a. Multiple first protrusions are formed circumferentially within the first hole 410a, extending along the axis of the first hole 410a. The rotation adjustment member 100 engages with these multiple first protrusions, thereby rotating the first rotating member 410. The second rotating member 510 has a second hole 510a. Multiple second protrusions are formed circumferentially within the second hole 510a. These second protrusions extend along the axis of the second hole 510a. The rotation adjustment member 100 rotates by engaging with these multiple second protrusions, thereby driving the second rotating member 510 to rotate. Specifically, the rotation adjustment member 100 includes a rod portion 120 and a head portion 110. The rod portion 120 includes a connecting engaging portion 121 and a threaded portion 122. One end of the engaging portion 121, away from the threaded portion 122, is connected to the head portion 110. The engaging portion 121 has a third protrusion to engage with the first and second protrusions. The threaded portion 122 is threaded into the rotating hole 320a, and the outer diameter of the threaded portion 122 is less than or equal to the outer diameter of the engaging portion 121.

[0073] In this embodiment, the first rotating member 410 and the second rotating member 510 are rotated relative to the cylinder 300 by the rotating adjustment member 100, thereby causing the first telescopic member 420, which meshes with the first rotating member 410 through the rack 600, to extend and retract radially along the cylinder 300, and the second telescopic member 520, which meshes with the second rotating member 510 through the rack 600, to extend and retract radially along the cylinder 300.

[0074] Specifically, the rotating adjustment component 100 is a bolt, which passes through the first rotating component 410 and the second rotating component 510 and then engages with the rotating hole 320a through a thread.

[0075] Preferably, in this application, the first support member 430 is provided with a plurality of first fastening holes 430a, the cylinder wall 310 is provided with a plurality of second fastening holes 310c, and the central shaft structure 10 of the reducer also includes a plurality of sets of fasteners, specifically four sets. Each set of fasteners includes a plurality of threaded fasteners. The plurality of threaded fasteners in each set correspond one-to-one with the plurality of first fastening holes 430a and second fasteners. After the extension and retraction of the first support member 430 is completed, the threaded fasteners are inserted into the first fastening holes 430a and the second fastening holes 310c to fix the first support member 430 relative to the cylinder 300.

[0076] The connection and rotation methods described in this application are not limited to threaded connections or pin connections; other connection methods, such as welding, are also possible. The snap-fit ​​method can be a snap-fit ​​between protrusions or an interference fit. The above-mentioned connection and snap-fit ​​methods are not limited herein.

[0077] One embodiment of this application also provides a speed reducer, which includes a drive mechanism and a central shaft structure 10. The drive mechanism is connected to the cylinder 300 to drive the cylinder 300 to rotate.

[0078] During the installation of the aforementioned speed reducer with the main beam of the photovoltaic module, the telescopic component 200 is first brought closer to the axis of the cylinder 300 through the cooperation between the rotating adjustment component 100 and the telescopic component 200. Then, the entire central shaft structure 10 of the speed reducer is placed inside the main beam of the photovoltaic module. Subsequently, the telescopic component 200 is moved away from or closer to the axis of the cylinder 300 and adapted to the inner wall of the main beam through the cooperation between the rotating adjustment component 100 and the telescopic component 200. This adapts the outer diameter of the central shaft structure 10 of the speed reducer to the inner diameter of the main beam. The drive mechanism then drives the cylinder 300 to rotate, thereby rotating the main beam and causing the photovoltaic module to turn so that it always faces the sun. The central shaft structure 10 of the speed reducer can be mass-produced to suit main beams with different inner diameters, avoiding mismatches between the central shaft structure 10 and the main beam due to dimensional errors, improving installation efficiency, and reducing production and installation costs.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A shaft structure for a speed reducer, characterized in that, The central shaft structure of the reducer includes: cylindrical body; Telescopic assembly, wherein the telescopic assembly portion is located within the cylinder and extends beyond the cylinder; and A rotating adjustment component is provided, which passes through the telescopic assembly and is connected to the telescopic assembly to enable the telescopic assembly to extend and retract radially along the cylinder and adapt to the inner wall of the main beam.

2. The central shaft structure of the reducer according to claim 1, characterized in that, The telescopic assembly includes a first telescopic structure and a second telescopic structure, wherein the first telescopic structure and the second telescopic structure are partially located inside the cylinder and extend out of the cylinder; The rotation adjustment component is sequentially inserted into the first telescopic structure and the second telescopic structure; The rotating adjustment component is simultaneously connected to both the first telescopic structure and the second telescopic structure, so that the first telescopic structure and the second telescopic structure can extend and retract radially along the cylinder and adapt to the inner wall of the main beam.

3. The central shaft structure of the reducer according to claim 2, characterized in that, The first telescopic structure includes: a first rotating member, a plurality of first telescopic members, and a plurality of first supporting members; Multiple first telescopic components and multiple first support components are one-to-one. Multiple first telescopic components are evenly arranged around the circumference of the first rotating component. The first telescopic components pass through the cylinder and are connected to the corresponding first support component. The first rotating component cooperates with one end of the first telescopic component. The rotation adjustment component cooperates with the first rotating component to drive the first rotating component to rotate. The first rotating component drives the first telescopic component to extend and retract radially along the cylinder and adapt to the inner wall of the main beam.

4. The central shaft structure of the reducer according to claim 3, characterized in that, The first telescopic member includes a first mating part and a first connecting part that are connected to each other; The first rotating member engages with the end of the first mating part that is away from the first connecting part, so as to drive the first telescopic member to extend and retract radially along the cylinder. The first connecting part passes through the cylinder and is connected to the first support member.

5. The central shaft structure of the reducer according to claim 3, characterized in that, The second telescopic structure includes: a second rotating member, a plurality of second telescopic members, and a plurality of second supporting members; Multiple second telescopic components and multiple second support components correspond one-to-one. Multiple second telescopic components are evenly arranged around the circumference of the second rotating component. The second telescopic components pass through the cylinder and are connected to the corresponding second support components. The second rotating component cooperates with one end of the second telescopic component. The rotation adjustment component cooperates with the second rotating component to drive the second rotating component to rotate. The second rotating component drives the second telescopic component to extend and retract radially along the cylinder and adapt to the inner wall of the main beam.

6. The central shaft structure of the reducer according to claim 5, characterized in that, The second telescopic member includes a second mating part and a second connecting part that are connected to each other; The second rotating member engages with the end of the second mating part that is away from the second connecting part, so as to drive the second telescopic member to extend and retract radially along the cylinder; The second connecting part passes through the cylinder and is connected to the second support member.

7. The central shaft structure of the reducer according to claim 5, characterized in that, The first rotating member and the second rotating member are arranged along the axis of the cylinder; The rotation adjustment component, the first rotation component, the second rotation component, and the cylinder are coaxially arranged; The rotation adjustment component is sequentially inserted through the first rotating component and the second rotating component and is simultaneously connected to the first rotating component and the second rotating component; Multiple first support members and multiple second support members are arranged sequentially at intervals along the circumference of the cylinder.

8. The central shaft structure of the reducer according to claim 7, characterized in that, The cylinder includes a cylinder wall and a fixing member. The fixing member and the telescopic assembly are disposed inside the cylinder wall, and the first telescopic member and the second telescopic member pass through the cylinder wall. The rotating adjustment component passes through the fixing component and rotates in coordination with the fixing component.

9. The central shaft structure of the reducer according to claim 5, characterized in that, Both the first rotating member and the second rotating member are gears. Both the first telescopic member and the second telescopic member are provided with racks on the side of the cylinder near the axis. The first telescopic member meshes with the first rotating member, and the second telescopic member meshes with the second rotating member.

10. A speed reducer, characterized in that, The speed reducer includes: a drive mechanism and a central shaft structure of the speed reducer according to any one of claims 1-9; The drive mechanism is connected to the cylinder to drive the cylinder to rotate.

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