A rotary support structure for polygonal tube spindles

Abstract

The utility model belongs to solar photovoltaic tracking system technical field discloses a kind of rotating support structure suitable for polygonal tube main shaft, including shaft seat and shaft ring, shaft ring is fixedly installed on shaft seat, the shaft ring is bent into annular structure by round steel, its cross section is circular, upper slide block group and at least one lower slide block are arranged on the inner ring surface of shaft ring, upper slide block group is set in the upper region of the inner surface of shaft ring, lower slide block is set in the lower region of shaft ring and is symmetrically arranged about the axial center line of shaft ring, upper slide block group and lower slide block form shaft mounting position together, shaft mounting position is rotationally cooperated with shaft ring, and main shaft is clamped on shaft mounting position, and the cross section of main shaft is octagonal tube body;The utility model whole structure is simple, can reduce installation difficulty, save processing use cost, effectively reduce tracking support self friction in use simultaneously, to reduce power consumption in tracking process, match and adapt to the installation of pipe material of various structures, improve use effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of solar photovoltaic tracking systems, specifically, it relates to a rotary support structure suitable for the main shaft of a polygonal tube. Background Technology

[0002] In the field of new energy power generation, photovoltaic tracking brackets have become one of the core equipment of photovoltaic power plants due to their advantages of being able to adjust their angle by following the sun's trajectory and increasing power generation. As the core load-bearing and transmission component of the photovoltaic tracking bracket, the rationality of its structure directly determines the operational stability, service life and overall cost of the bracket.

[0003] Traditional photovoltaic (PV) tracking brackets mostly use square tube spindles, but this has significant limitations: to meet bending and torsional strength requirements, the square tubes need to be designed to be larger, leading to increased overall weight, which not only increases material costs but also increases installation difficulty; at the same time, the straightness of the square tubes is complex to process, and the right-angle structure is prone to stress concentration when mating with bearings, affecting the long-term stability of the bearings. To solve these problems, octagonal tube spindles have emerged, which can significantly reduce material usage and extend module life while ensuring bending and torsional resistance. Therefore, they have been widely used in multi-string, large-span PV arrays.

[0004] A Chinese patent application with application number CN2020212040161 discloses a photovoltaic tracking bracket, including a main shaft, bearings, bearing seats, an upper pad, and a lower pad. The main shaft is an octagonal circular tube, which is composed of four planes and four arc surfaces alternating to form a ring. When bifacial photovoltaic modules are installed on the main shaft, a portion of the bifacial photovoltaic module is blocked by the main shaft, causing the blocked portion to be unable to receive light. The portion of the module that cannot receive light will heat up, forming a hot spot effect, which seriously shortens the lifespan of the bifacial module. In this structure, the arc surface section has the function of reflecting direct sunlight. The light can be reflected by the arc surface to the blocked component, reducing the generation of hot spot effect and extending the lifespan of the module. However, the metal components in this patent have poor self-lubricating properties, requiring frequent lubricant additions during long-term operation. Photovoltaic power stations are often located in remote outdoor environments, making maintenance difficult and costly. Furthermore, the lubricant is susceptible to failure due to harsh environmental conditions such as wind, rain, and temperature differences, leading to increased frictional wear and shortening the overall lifespan of the main shaft. On the other hand, the metal components are rigid and have poor shock absorption when subjected to external forces such as outdoor wind, easily transmitting vibrations to the main shaft and photovoltaic modules. This not only affects the adjustment accuracy of the support structure but may also exacerbate structural fatigue damage and even lead to component loosening. In addition, there is still room for improvement in the compatibility between traditional metal contact components and the octagonal tube main shaft. The octagonal tube main shaft has an irregular cross-section structure, requiring metal components to be precisely matched to its octagonal contour during processing. This process is complex and costly. Simultaneously, the metal material is susceptible to corrosion from outdoor corrosive media, further reducing the fitting accuracy and structural stability. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide a rotary support structure for polygonal tube spindles that has a simple overall structure, reduces installation difficulty, saves processing and usage costs, effectively reduces the friction of the tracking bracket itself during use, thereby reducing power consumption during tracking, and is compatible with various tube structures for installation, thus improving the performance of use.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A rotary support structure suitable for a polygonal tube spindle includes a bearing seat and a ring. The ring is fixedly installed on the bearing seat. The ring is made of round steel bent into a circular ring structure with a circular cross-section. An upper slider group and at least one lower slider are provided on the inner surface of the ring. The upper slider group is fitted in the upper region of the inner surface of the ring, and the lower slider is fitted in the lower region of the ring and symmetrically arranged about the axial center line of the ring. The upper slider group and the lower slider together form a shaft mounting position. The shaft mounting position is rotatably engaged with the ring. A spindle is clamped in the shaft mounting position. The spindle has an octagonal tube cross-section. Both the upper and lower sliders are made of high-molecular friction-resistant materials.

[0007] The following are further optimizations of the above technical solution by this utility model: The upper slider assembly includes a first upper slider sleeved on the shaft ring, and a second upper slider fixedly installed on the other side of the first upper slider.

[0008] Further optimization: A first slot is provided at the connection between the first upper slider and the shaft ring. The shape of the first slot matches the shaft ring, and the first slot slides in contact with the outer surface of the shaft ring. A recess is provided at the middle position of one side of the first upper slider that is perpendicular to the first slot. A first through hole is provided in the recess. The first through hole is located below the first slot and passes through the first upper slider.

[0009] Further optimization: The side of the first upper slider that is away from the first slot is set as a plane, and the side of the second upper slider that corresponds to the plane of the first upper slider is also set as a plane.

[0010] Further optimization: A protrusion is provided on one side of the plane of the second upper slider, and the outer dimensions of the protrusion match the concave part; The protrusion is provided with a second through hole, the size and position of which match the first through hole.

[0011] Further optimization: A second slot is provided on the side of the second upper slider away from the protrusion, and the second slot can match and fit with the outer surface of the spindle.

[0012] Further optimization: A fourth slot is provided on the side of the lower slider that is connected to the shaft ring. The shape of the fourth slot matches the outer surface of the shaft ring, and the fourth slot slides in conjunction with the outer surface of the shaft ring.

[0013] Further optimization: A third slot is provided on the side of the lower slider away from the fourth slot, and the shape of the third slot matches the outer surface of the spindle.

[0014] Further optimization: The main shaft cross-section is a hexagonal tube.

[0015] This utility model adopts the above-mentioned technical solution, with ingenious conception and reasonable structure. It can be applied to octagonal tube-shaped spindles, reducing friction and maintenance costs during spindle tracking. At the same time, it can improve installation stability and applicability. First, the second slot of the upper slider group and the third slot of the lower slider can fit the surface of the octagonal tube spindle, accurately matching its irregular cross-section, solving the problem of poor adaptability of traditional metal parts. Furthermore, it adopts a distributed layout of single point at the top and symmetrical double points at the bottom, combined with the sliding fit design of the slot and the shaft ring, which simplifies the installation process, reduces assembly errors, improves spindle installation stability, and facilitates use.

[0016] In addition, both the upper and lower sliders are made of high-molecular friction-resistant materials, which have good self-lubricating properties and do not require frequent addition of lubricant, reducing the difficulty and cost of outdoor maintenance. Furthermore, the surface roughness of the slider slot is reduced through machining processes, which reduces frictional loss with the shaft ring and main shaft, thereby reducing the power consumption during the adjustment process of the photovoltaic tracking bracket.

[0017] The slider structure is simple in design and the processing technology is less difficult than that of traditional irregular metal parts, which reduces the production and manufacturing costs. In the application process, it can be adapted to spindles of different shapes such as hexagonal tubes by simply adjusting the third slot structure. It has a wide range of applications and does not require the design of matching parts for different tubes.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure in Embodiment 1 of this utility model; Figure 2 This is a front view of the overall structure in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the structure of the first upper slider in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the structure of the second upper slider in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the lower slider in Embodiment 1 of this utility model; Figure 6This is a schematic diagram of the lower slider from another perspective in Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of the installation of the shaft ring in Embodiment 1 of this utility model; Figure 8 This is a schematic diagram of the overall structure in Embodiment 2 of this utility model; Figure 9 This is a front view of the overall structure in Embodiment 2 of this utility model; Figure 10 This is a schematic diagram of the lower slider in Embodiment 2 of this utility model; Figure 11 This is a structural schematic diagram of the lower slider from another perspective in Embodiment 2 of this utility model.

[0020] In the diagram: 1. Shaft seat; 2. Shaft ring; 3. Main shaft; 4. Upper slider assembly; 41. First upper slider; 411. First slot; 412. Recess; 413. First through hole; 42. Second upper slider; 421. Protrusion; 422. Second through hole; 423. Second slot; 5. Lower slider; 51. Third slot; 52. Fourth slot; 6. Locking bolt; 7. Locking nut. Detailed Implementation

[0021] Example 1: like Figure 1-7 As shown: A rotary support structure suitable for a polygonal tube spindle includes a bearing seat 1 and a ring 2. The ring 2 is fixedly installed on the bearing seat 1. The ring 2 is made of round steel bent into a circular ring structure with a circular cross-section. An upper slider group 4 and two lower sliders 5 are provided on the inner surface of the ring 2. The upper slider group 4 is fitted in the upper area of ​​the inner surface of the ring 2, and the two lower sliders 5 are fitted in the lower area of ​​the inner surface of the ring 2 and are symmetrically arranged about the axial center line of the ring 2. The upper slider group 4 and the two lower sliders 5 together form a shaft mounting position. The shaft mounting position is rotatably engaged with the ring 2, and the spindle 3 is clamped in the shaft mounting position.

[0022] In this embodiment 1, the bearing seat 1 is fixedly installed on the photovoltaic bracket by bolts, and the shaft ring 2 is an overall ring structure.

[0023] The shaft ring 2 is fixedly installed on the shaft seat 1 by welding. The connection between the shaft seat 1 and the shaft ring 2 is set with an arc shape that matches the shaft ring 2 to ensure the strength of the connection between the shaft ring 2 and the shaft seat 1.

[0024] The main shaft 3 is made of a tube with an octagonal cross-section.

[0025] The upper slider assembly 4 includes a first upper slider 41 sleeved on the shaft ring 2, and a second upper slider 42 is fixedly installed on the other side of the first upper slider 41.

[0026] like Figure 3As shown, a first slot 411 is provided at the connection between the first upper slider 41 and the shaft ring 2. The shape of the first slot 411 matches the shaft ring 2 and is set to be arc-shaped. At the same time, the first slot 411 slides in contact with the outer surface of the shaft ring 2.

[0027] The first slot 411 is arranged along the length of the first upper slider 41. During installation, the first slot 411 of the first upper slider 41 is fitted with the outer surface of the shaft ring 2.

[0028] A recess 412 is provided at the middle position of the surface of the first upper slider 41 that is perpendicular to the first slot 411.

[0029] The recess 412 is provided with a first through hole 413, which is located below the first slot 411 and passes through the first upper slider 41.

[0030] The side of the first upper slider 41 that is away from the first slot 411 is set as a plane.

[0031] like Figure 4 As shown, the side of the second upper slider 42 that corresponds to the plane of the first upper slider 41 is also set as a plane.

[0032] A protrusion 421 is provided on one side of the plane of the second upper slider 42, and the external dimensions of the protrusion 421 match those of the recess 412.

[0033] The protrusion 421 is provided with a second through hole 422, the size and position of which match the first through hole 413.

[0034] A second slot 423 is provided on the side of the second upper slider 42 away from the protrusion 421, and the second slot 423 can match and fit with the outer surface of the main shaft 3.

[0035] In this embodiment 1, the second slot 423 is configured as a trapezoidal slot structure that matches the outer surface of the spindle 3.

[0036] With this design, when the second slot 423 is in contact with the spindle 3, the second slot 423 can be in contact with the three adjacent surfaces of the spindle 3, increasing the installation stability of the spindle 3.

[0037] like Figure 5-6 As shown, a fourth slot 52 is provided on the side of the lower slider 5 that is connected to the shaft ring 2.

[0038] The shape of the fourth slot 52 matches the outer surface of the shaft ring 2, and the fourth slot 52 is also arranged along the length of the lower slider 5.

[0039] The fourth slot 52 slides with the outer surface of the shaft ring 2.

[0040] With this design, the lower slider 5 is slidably mounted on the shaft ring 2 using the same mounting principle as the first upper slider 41.

[0041] The sliding block 5 has a third slot 51 on the side away from the fourth slot 52.

[0042] The third slot 51 is also configured as a trapezoidal slot structure, the shape of which matches the outer surface of the spindle 3 and can fit against the outer surface of the spindle 3.

[0043] With this design, when the third slot 51 of each sliding block 5 is in contact with the main shaft 3, the third slot 51 can be in contact with three adjacent surfaces of the main shaft 3, increasing the installation stability of the main shaft 3.

[0044] During installation, the first upper slider 41 is first fitted onto the upper area of ​​the shaft ring 2 through the first slot 411, and then the two lower sliders 5 are fitted onto the lower area of ​​the shaft ring 2 through the fourth slot 52 respectively. The two lower sliders 5 are symmetrically arranged and located on both sides of the first upper slider 41. This forms a distributed and stable layout with a single point at the top (the position of the upper slider group 4) and symmetrical double points at the bottom (the positions of the two lower sliders 5). Then, the spindle 3 is installed into the shaft ring 2. First, the positions of the two lower sliders 5 are finely adjusted to ensure that the outer surface of the spindle 3 is in contact with the two third slots 51. Finally, the second upper slider 42 is installed between the first upper slider 41 and the spindle 3 until the protrusion 421 of the second upper slider 42 is inserted into the concave part 412 of the first upper slider 41 and fits. Then, the same locking bolt 6 is inserted into the first through hole 413 and the second through hole 422. The locking bolt 6 passes through the first through hole 413 and the second through hole 422 and is threaded to the locking nut 7. The locking nut 7 is rotated until the first upper slider 41 and the second upper slider 42 are locked and fixed. At this time, the second slot 423 of the second upper slider 42 fits with the outer surface of the spindle 3, completing the installation and locking of the spindle 3.

[0045] In this embodiment 1, both the upper slider group 4 and the lower slider 5 are made of high-polymer friction-resistant material, and the first slot 411, the second slot 423, the third slot 51 and the fourth slot 52 are all processed by machining process. This can improve the machining accuracy, reduce the assembly error with the shaft ring 2, and reduce the surface roughness, thereby effectively reducing the friction of the tracking bracket itself and reducing the power consumption during the tracking process when driving the main shaft 3 to rotate.

[0046] Example 2: like Figure 8-11As shown, the shape of the third slot 51 of the lower slider 5 is set to an angle shape, and the other structures are the same as in Embodiment 1. With this design, when the third slots 51 of the two lower sliders 5 are in contact with the main shaft 3, each third slot 51 can be in contact with two adjacent surfaces of the main shaft 3, which can also increase the installation stability of the main shaft 3.

[0047] Example 3: Based on Embodiment 1, the number of lower sliders 5 can be set to one. In this case, the lower slider 5 is sleeved on the lower region of the shaft ring 2 and symmetrically arranged about the radial center line of the shaft ring 2. At the same time, the lower slider 5 and the upper slider group 4 are symmetrically arranged in position, and the third slot 51 of the lower slider 5 matches the outer surface of the main shaft 3.

[0048] With this design, the third slot 51 of the sliding block 5 can fit with the three adjacent surfaces of the spindle 3, increasing the installation stability of the spindle 3.

[0049] Example 4: Based on Embodiment 2, the main shaft 3 is made of a hexagonal tube, and the third slot 51 of the two lower sliders 5 matches the outer surface of the main shaft 3 made of the hexagonal tube, which has a wide range of applications.

[0050] Example 5: Based on embodiment 3, the main shaft 3 is made of a hexagonal tube. In this case, the lower slider 5 is sleeved on the lower region of the shaft ring 2 and is symmetrically arranged about the radial center line of the shaft ring 2. At the same time, the lower slider 5 and the upper slider group 4 are symmetrically arranged in position, and the third slot 51 of the lower slider 5 matches the outer surface of the main shaft 3.

[0051] With this design, the third slot 51 of the sliding block 5 can fit with the three adjacent surfaces of the spindle 3, increasing the installation stability of the spindle 3.

[0052] In addition to the above embodiments, when the spindle 3 is made of a tube with other structural variations, it is only necessary to change the structure of the third slot 51 of the sliding block 5 and match the number of sliding blocks 5 according to the outer surface structure of the tube of the spindle 3, which has a wide range of applications.

[0053] For those skilled in the art, any changes, modifications, substitutions, and variations made to the embodiments based on the teachings of this utility model, without departing from the principles and spirit of this utility model, still fall within the protection scope of this utility model.

Claims

1. A rotary support structure suitable for a polygonal tube spindle, comprising a bearing seat (1) and a bearing ring (2), wherein the bearing ring (2) is fixedly mounted on the bearing seat (1), characterized in that: The shaft ring (2) is made of round steel bent into a circular ring structure with a circular cross-section. The inner surface of the shaft ring (2) is provided with an upper slider group (4) and at least one lower slider (5). The upper slider group (4) is sleeved on the upper area of ​​the inner surface of the shaft ring (2), and the lower slider (5) is sleeved on the lower area of ​​the shaft ring (2) and symmetrically arranged about the axial center line of the shaft ring (2). The upper slider group (4) and the lower slider (5) together form a shaft mounting position. The shaft mounting position is rotatably engaged with the shaft ring (2), and a main shaft (3) is clamped on the shaft mounting position. Both the upper slider assembly (4) and the lower slider assembly (5) are made of high-molecular friction-resistant material.

2. The rotary support structure suitable for polygonal tube spindles according to claim 1, characterized in that: The main shaft (3) has an octagonal cross-section.

3. A rotary support structure suitable for polygonal tube spindles according to claim 2, characterized in that: The upper slider assembly (4) includes a first upper slider (41) sleeved on the shaft ring (2), and a second upper slider (42) is fixedly installed on the other side of the first upper slider (41).

4. A rotary support structure suitable for polygonal tube spindles according to claim 3, characterized in that: A first slot (411) is provided at the connection between the first upper slider (41) and the shaft ring (2). The shape of the first slot (411) matches the shaft ring (2), and the first slot (411) slides in cooperation with the outer surface of the shaft ring (2). A recess (412) is provided at the middle position on the side of the first upper slider (41) that is perpendicular to the first slot (411). A first through hole (413) is provided on the recess (412). The first through hole (413) is located below the first slot (411) and passes through the first upper slider (41).

5. A rotary support structure suitable for polygonal tube spindles according to claim 4, characterized in that: The side of the first upper slider (41) away from the first slot (411) is set as a plane, and the side of the second upper slider (42) corresponding to the plane of the first upper slider (41) is also set as a plane.

6. A rotary support structure suitable for polygonal tube spindles according to claim 5, characterized in that: A protrusion (421) is provided on one side of the plane of the second upper slider (42), and the outer dimensions of the protrusion (421) match those of the concave part (412). The protrusion (421) has a second through hole (422), the size and position of which match the first through hole (413).

7. A rotary support structure suitable for polygonal tube spindles according to claim 6, characterized in that: A second slot (423) is provided on the side of the second upper slider (42) away from the protrusion (421), and the second slot (423) can match and fit with the outer surface of the main shaft (3).

8. A rotary support structure suitable for polygonal tube spindles according to claim 7, characterized in that: A fourth slot (52) is provided on the side of the lower slider (5) that is connected to the shaft ring (2). The shape of the fourth slot (52) matches the outer surface of the shaft ring (2), and the fourth slot (52) slides in cooperation with the outer surface of the shaft ring (2).

9. A rotary support structure suitable for polygonal tube spindles according to claim 8, characterized in that: The sliding block (5) has a third slot (51) on the side away from the fourth slot (52), and the shape of the third slot (51) matches the outer surface of the main shaft (3).

10. A rotary support structure suitable for polygonal tube spindles according to claim 1, characterized in that: The main shaft (3) has a hexagonal cross-section.

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