Plum bearing system for solar photovoltaic tracking support

Abstract

The invention provides a plum bearing system for a solar photovoltaic tracking bracket. The plum bearing system comprises a main shaft ball bearing, the spindle ball bearing comprises a first end face and a second end face, a polygonal cavity is formed in the direction from the first end face to the second end face, a first groove is formed in the position, in the inner corner area of the polygonal cavity, of the first end face in a sinking mode, and a second groove is formed in the position, in the inner corner area of the polygonal cavity, of the second end face in a sinking mode. The main shaft ball bearing of the bearing system is subjected to avoidance treatment in the inner angle area, the phenomenon that the end face inner angle area is insufficient in strength and cracks is avoided, the effective contact area of the main shaft ball bearing and the main shaft is guaranteed on the premise that cost is not increased and the overall strength of the bearing is not weakened, and it is guaranteed that the main shaft ball bearing stably operates in the whole life cycle of the support.

Description

Technical field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a plum blossom bearing system for a solar photovoltaic tracking bracket. [Background Technology]

[0002] As global photovoltaic installations continue to expand, market demand for photovoltaic tracking systems is increasing year by year. Bearing systems are key components that ensure precise rotation and real-time tracking of photovoltaic tracking systems. Their performance directly impacts their stability, tracking accuracy, and power generation efficiency. Prior art photovoltaic tracking systems generally utilize a multi-point mechanical transmission structure, where a transmission rod drives the main shaft to achieve tracking. Therefore, the transmission rod and main shaft require corresponding bearing systems. Existing bearing systems typically include a bearing seat, main shaft ball bearings, and transmission rod ball bearings. These systems suffer from the following major drawbacks: Ball bearings present reliability risks and inadequate stability. Thin-walled areas of conventional plastic main shaft ball bearings (such as the inner corners of a polygonal cavity) are prone to stress concentration, making them susceptible to cracking and failure over long periods of operation. Split ball bearings often utilize either a plug-in or locking design. However, plug-in designs fail to constrain all degrees of freedom of the split ball bearing, preventing ideal integrity. Relative slippage can occur during high-speed main shaft rotation, impacting tracking accuracy. While locking designs achieve good integrity, they increase installation steps and reduce efficiency.

[0003] In view of this, the inventors of this case conducted in-depth research on the above-mentioned issues, which led to the creation of this case. [Summary of the invention]

[0004] The present invention aims to solve the technical problems of complex and redundant structures of existing bearing systems, reliability risks and insufficient stability of ball bearings. It provides a plum blossom bearing system for solar photovoltaic tracking brackets, which greatly reduces the types and quantities of parts and optimizes the installation steps and efficiency of photovoltaic tracking brackets; performs evasive treatment on thin-walled areas to avoid cracking due to insufficient strength in the thin-walled areas on the end faces, and ensures the effective contact area between the main shaft ball bearing and the main shaft without increasing costs and weakening the overall strength of the bearing, thereby ensuring the stable operation of the main shaft ball bearing throughout the life cycle of the bracket.

[0005] The present invention is implemented as follows: a plum blossom bearing system for a solar photovoltaic tracking bracket includes a bearing seat, a bearing flap and a spindle ball bearing; the bearing seat and the bearing flap are detachably connected by fasteners, and the bearing seat and the bearing flap are covered to form an installation cavity for installing the spindle ball bearing; the spindle ball bearing includes a first end face and a second end face, and a polygonal cavity for the spindle to pass through is formed from the first end face to the second end face, and the first end face is provided with a first groove in the inner corner area of the polygonal cavity, and the second end face is provided with a second groove in the inner corner area of the polygonal cavity.

[0006] Furthermore, the polygonal cavity is any one of a regular octagonal through-hole cavity, a regular heptagonal through-hole cavity, a regular hexagonal through-hole cavity, a regular pentagonal through-hole cavity, and a regular quadrilateral through-hole cavity.

[0007] Furthermore, the spindle ball bearing includes a first bearing split and a second bearing split that can be engaged with each other; the first bearing split is formed with a first half through-groove, and the second bearing split is formed with a second half through-groove; after the first bearing split and the second bearing split are engaged, the first half through-groove and the second half through-groove constitute a polygonal cavity; one end of the first bearing split is fixed with a first snap-fit portion, and the other end is fixed with a second snap-fit portion; one end of the second bearing split is fixed with a third snap-fit portion that cooperates with the first snap-fit portion, and the other end is fixed with a fourth snap-fit portion that cooperates with the second snap-fit portion; the structures of the second snap-fit portion, the third snap-fit portion, and the fourth snap-fit portion are all the same as those of the first snap-fit portion.

[0008] Furthermore, the first snap-fit portion includes a first snap-fit unit and a second snap-fit unit; the first snap-fit unit includes a first connecting block, a first clamping block and a first L-shaped hook groove, and the surface of the first clamping block is sequentially formed with an oblique groove, a first circular arc transition surface, and a first oblique boss from the inside to the outside; one side of the first connecting block and the first clamping block is integrally arranged with the first bearing split, and the other side is integrally arranged with the second connecting block; the second snap-fit unit includes a second connecting block, a second clamping block and a second L-shaped hook groove; the surface of the second clamping block is sequentially formed with a flat groove, a second circular arc transition surface, and a second oblique boss from the inside to the outside; the projection surface of the second clamping block on the first snap-fit unit is located in the area of the first L-shaped hook groove.

[0009] Furthermore, the oblique groove is connected to the first L-shaped hook groove, and the oblique groove and the first L-shaped hook groove are arranged toward the outside of the first bearing split; the flat groove is connected to the second L-shaped hook groove, and the flat groove and the second L-shaped hook groove are arranged toward the inside of the first bearing split.

[0010] Furthermore, it also includes a bearing flap and a bearing seat, wherein the bearing seat and the bearing flap are detachably connected via fasteners, and the bearing seat and the bearing flap are covered together to form an installation cavity for installing the spindle ball bearing.

[0011] The advantages of the present invention are:

[0012] 1. The spindle ball bearing has a first groove on the first end face of the thin-walled area. The multiple grooves make the first end face look like a petal as a whole, and the second end face is also like this. The two sides work together to make the two end faces of the spindle ball bearing look like a plum blossom. The thin-walled areas of the two end faces were originally the thinnest areas of the spindle ball bearing. The grooves are opened here to avoid cracking caused by insufficient strength of the thin-walled areas of the end faces. Without increasing the cost and weakening the overall strength of the bearing, the effective contact area between the spindle ball bearing and the spindle is guaranteed, solving the problem of cracking in the thin area of the spindle ball bearing, ensuring the stable operation of the spindle ball bearing throughout the life cycle of the bracket while taking into account the beautiful design of the overall appearance of the spindle ball bearing.

[0013] 2. The spindle ball bearing adopts a double-sided snap-on plastic spindle ball bearing. By designing inclined bosses and grooves on the left and right ends of the bearing split, no additional bolts or other limiting parts are required. Only by deforming the material of the plastic spindle ball bearing itself, the first bearing split and the second bearing split can be combined into a whole and non-moving spindle ball bearing, avoiding rotational slippage between the bearing seat and the spindle. At the same time, the installation steps are simplified, the disassembly and assembly are more convenient, and material and labor costs are saved.

[0014] 3. The bearing seat and bearing flap of the bearing system of the present invention are made by metal stamping process, which is different from the traditional welding or extrusion process. The stamping process is not only simple in process, but also greatly improves the one-piece molding production efficiency of the bearing seat, reducing production costs; the bearing system only includes two metal parts, the bearing seat and the bearing flap, and one plastic part, the spindle ball bearing, which greatly reduces the types and quantities of parts, optimizes the installation steps and efficiency of the photovoltaic tracking bracket, and is of great help to improving the market competitiveness of the multi-point mechanical linkage tracking bracket.

Brief Description of the Drawings

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural schematic diagram of the bearing system in the present invention.

[0017] Figure 2 It is one of the side views of the spindle ball bearing in the present invention.

[0018] Figure 3 It is a structural schematic diagram of the spindle ball bearing in the present invention.

[0019] Figure 4 This is the second side view of the spindle ball bearing in the present invention.

[0020] Figure 5 It is an exploded view of the spindle ball bearing in the present invention.

[0021] Figure 6This is one of the cross-sectional views of the spindle ball bearing in the present invention.

[0022] Figure 7 This is the second sectional view of the spindle ball bearing in the present invention.

[0023] Figure 8 This is a schematic structural diagram of the first inclined boss and the second inclined boss when they first come into contact and slide.

[0024] Figure 9 It is a structural schematic diagram of the first arc transition surface and the second arc transition surface when they are in interference sliding in the present invention.

[0025] Figure 10 It is a schematic diagram of the structure of the flat groove and the first inclined boss after being buckled in the present invention.

[0026] Figure 11 It is a schematic diagram of the installation structure of the bearing flap and the bearing seat in the present invention.

[0027] Figure 12 It is a structural schematic diagram of the bearing flap in the present invention.

[0028] Figure 13 It is an exploded view of the bearing seat in the present invention.

[0029] Reference numerals:

[0030] Spindle ball bearing 100, first end face 1, first groove 11, second end face 2, second groove 21, polygonal cavity 3, plane 31, inner angle 32, thick-walled area 33, thin-walled area 34, weight-reducing hole 35, first bearing split 4, first snap portion 41, first snap unit 411, first connecting block 4111, first clamping block 4112, first L-shaped hook groove 4113, oblique groove 4114, first circular arc transition surface 4115, first oblique boss 4116, second snap unit 412, second connecting block 4121, second clamping block 4122, second L-shaped hook groove 4123, flat groove 4124, second circular arc transition surface 4125, second oblique boss 4126, second snap portion 42, second bearing split 5, third snap portion 51, fourth snap portion 52.

[0031] Bearing flap 200 , bearing covering surface 6 , left hanging ear 7 , first left flat plate 71 , first left punched hole 711 , second left flat plate 72 , left assembly gap 73 , right hanging ear 8 , first right flat plate 81 , first right punched hole 811 , second right flat plate 82 , right assembly gap 83 .

[0032] Bearing seat 300, first bearing support 9, Y-shaped back plate 91, left flange 911, right flange 912, letter symbol reinforcement rib 913, left insert plate 92, first left drawn circular groove 921, third left punching 922, right insert plate 93, first right drawn circular groove 931, third right punching 932, supporting spherical surface 94, first through hole 95, second left drawn circular groove 96, fourth left punching 97, second right drawn circular groove 98, fourth right punching 99, second bearing support 10.

[0033] Fastener 400 , first flange bolt fastening assembly 401 , second flange bolt fastening assembly 402 , third flange bolt fastening assembly 403 , fourth flange bolt fastening assembly 404 .

[0034] Install the cavity 500 and the main shaft 600. [Specific implementation method]

[0035] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0036] See also Figures 1 to 13 As shown, the present invention provides a plum blossom bearing system for a solar photovoltaic tracking bracket, comprising a bearing seat 300, a bearing cover 200, and a spindle ball bearing 100. The bearing seat 300 and the bearing cover 200 are detachably connected via fasteners 400. When the bearing seat 300 and the bearing cover 200 are closed, a mounting cavity 500 is formed for mounting the spindle ball bearing 100. The mounting cavity 500 allows the spindle ball bearing 100 and the spindle 600 to rotate freely in any direction, adapting to the installation requirements of the photovoltaic tracking bracket on different slopes. The spindle ball bearing 100 is made of plastic.

[0037] The bearing system of the present invention utilizes a metal stamping process to manufacture the bearing seat 300 and bearing cover 200. This process, unlike traditional welding or extrusion processes, simplifies the process and significantly improves production efficiency and reduces production costs by enabling the integral molding of the bearing seat 300. The bearing system comprises only two metal parts—the bearing seat 300 and bearing cover 200—and one plastic part, the spindle ball bearing 100. This significantly reduces the number of parts and optimizes the installation process and efficiency of photovoltaic tracking mounts, significantly contributing to the market competitiveness of multi-point mechanical linkage tracking mounts.

[0038] As attached Figure 2-4As shown, the spindle ball bearing 100 includes a first end face 1 and a second end face 2, and a polygonal cavity 3 for the spindle 600 to pass through is formed from the first end face 1 to the second end face 2, and the polygonal cavity 3 includes a plurality of planes 31 located on the inner wall of the spindle ball bearing 100, and an inner angle 32 is formed between adjacent planes 31; a thick-walled area 33 is formed between the plane 31 and the outer wall of the spindle ball bearing 100, and a thin-walled area 34 is formed between the inner angle 32 and the outer wall of the spindle ball bearing 100; the first end face 1 is provided with a first groove 11 in the inner angle 32 area of the polygonal cavity 3, and the second end face 4 is provided with a second groove 21 in the inner angle 32 area of the polygonal cavity 3. By opening grooves at both ends of the inner corner area, the design of multiple grooves makes the first end face 1 and the second end face 2 look like petals as a whole, and the two faces work together to make the two end faces of the main shaft ball bearing 100 have a plum blossom opening shape; the thin-walled areas 34 of the two end faces were originally the thinnest areas of the main shaft ball bearing 100. The grooves are opened here for circumventing treatment, which can avoid cracking caused by insufficient strength of the thin-walled areas 34 of the end faces. Without increasing costs and weakening the overall strength of the bearing, the effective contact area between the main shaft ball bearing 100 and the main shaft 600 is guaranteed, and the problem of cracking in the thin area of the main shaft ball bearing 100 is solved. It ensures that the main shaft ball bearing 100 can operate stably throughout the life cycle of the photovoltaic tracking bracket while taking into account the beautiful design of the overall appearance of the main shaft ball bearing 100.

[0039] Preferably, in the present invention, the spindle ball bearing 100 has a spherical shape.

[0040] In the present invention, the polygonal cavity 3 is any one of a regular octagonal through-hole cavity, a regular heptagonal through-hole cavity, a regular hexagonal through-hole cavity, a regular pentagonal through-hole cavity, and a regular quadrilateral through-hole cavity. The shape of the polygonal cavity 3 can be any polygon or special shape, as long as it matches the outer shape of the main shaft. Preferably, the polygonal cavity 3 is a regular octagonal through-hole cavity.

[0041] In the present invention, a plurality of weight-reducing holes 35 are provided on the plane 31 to reduce material consumption; the plurality of weight-reducing holes 35 are distributed at equal intervals.

[0042] As attached Figure 5As shown, the spindle ball bearing 100 includes a first bearing body 4 and a second bearing body 5 that can interlock. The first bearing body 4 is formed with a first half through-groove, and the second bearing body 5 is formed with a second half through-groove. When the first and second bearing bodies 4 and 5 are engaged, the first and second half through-grooves form a polygonal cavity 3. The spindle ball bearing 100 is a double-sided snap-fit plastic spindle ball bearing 100. The first bearing body 4 is fixedly provided with a first snap-fit portion 41 at one end and a second snap-fit portion 42 at the other end. The second bearing body 5 is fixedly provided with a third snap-fit portion 51 that mates with the first snap-fit portion 41 at one end and a fourth snap-fit portion 52 that mates with the second snap-fit portion 42 at the other end. When the first bearing body 4 and the second bearing body 5 are assembled, the first snap-fit portion 41 of the first bearing body 4 and the third snap-fit portion 51 of the second bearing body 5 are engaged, and the second snap-fit portion 42 of the first bearing body 4 and the fourth snap-fit portion 52 of the second bearing body 5 are engaged. Using the double-sided snap-fit plastic spindle ball bearing 100 of the present invention can prevent the upper bearing body from slipping when the spindle 600 rotates, ensuring the synchronization of the rotation angle of the spindle 600 and the bearing system. The structures of the second snap-fit portion 42, the third snap-fit portion 51, and the fourth snap-fit portion 52 are all the same as the first snap-fit portion 41. The standardized design achieves a unified structure for each snap-fit portion, eliminating the need for direction identification and improving installation efficiency.

[0043] As attached Figure 6-7As shown, the first snap-fit portion 41 includes a first snap-fit unit 411 and a second snap-fit unit 412; the first snap-fit unit 411 includes a first connecting block 4111, a first clamping block 4112 and a first L-shaped hook groove 4113, and the surface of the first clamping block 4112 is sequentially formed with an oblique groove 4114, a first arc transition surface 4115, and a first oblique boss 4116 from the inside to the outside; one side of the first connecting block 4111 and the first clamping block 4112 is integrally arranged with the first bearing split 4, and the other side is integrally arranged with the second connecting block 4121; by integrally arranging the first connecting block 4111 and the first clamping block 4112 with the first bearing split 4 and the second connecting block 4121, the structural integrity of the first snap-fit portion 41 is enhanced, and the stress concentration problem caused by the split connection is avoided. The second snap-fit unit 412 includes a second connecting block 4121, a second clamping block 4122, and a second L-shaped hook groove 4123. The surface of the second clamping block 4122 is formed, from the inside to the outside, with a flat groove 4124, a second arc transition surface 4125, and a second inclined boss 4126. The projection of the second clamping block 4122 on the first snap-fit unit 411 is located in the region of the first L-shaped hook groove 4113, so that the second clamping block 4122 and the first clamping block 4112 are vertically offset in space, facilitating the two-way engagement of the snap-fit parts. The first L-shaped hook groove 4113 of the first snap-fit part 41 is used to accommodate the second connecting block 4121 and the second clamping block 4122 of the third snap-fit part 51. The second L-shaped hook groove 4123 is used to accommodate the first connecting block 4111 and the first clamping block 4112 of the third snap-fit part 51. The double-sided snap-on plastic spindle ball bearing 100 of the present invention is designed with inclined bosses and grooves at the left and right ends of the bearing split, so that the first bearing split 4 and the second bearing split 5 can be combined into a whole and non-moving and falling-off spindle ball bearing only by deforming the material of the plastic spindle ball bearing 100 itself, without the need for additional bolts or other limiting parts, thereby avoiding rotational slippage between the bearing seat 300 and the spindle 600, and at the same time simplifying the installation steps, improving the convenience of disassembly and assembly, and saving material costs and labor costs.

[0044] As attached Figure 8-10As shown, the assembly principle of the first bearing split 4 and the second bearing split 5 is as follows: when the first snap portion 41 and the third snap portion 51 are assembled, there is an interference phenomenon when the second inclined boss 4126 of the first snap portion 41 and the first inclined boss 4116 of the third snap portion 51 slide, and the sliding continues by relying on the elastic deformation of the plastic material itself until the second arc transition surface 4125 of the first snap portion 41 slides over the first arc transition surface 4115 of the third snap portion 51, and the interference disappears; at this time, the second inclined boss 4126 of the first snap portion 41 and the oblique groove 4114 of the third snap portion 51 are highly fitted, and the oblique groove 4114 of the first snap portion 41 and the second oblique boss 4126 of the third snap portion 51 are highly fitted; similarly, the second snap portion 42 and the fourth snap portion 52 at the other end are also engaged with each other in this way; after engaging, the first bearing split 4 and the second bearing split 5 will not rotate relative to each other or move left and right relative to each other. The flat groove 4124 of the first snap-fit portion 41 does not fit in with the first inclined boss 4116 of the third snap-fit portion 51, and the first inclined boss 4116 of the first snap-fit portion 41 does not fit in with the flat groove 4124 of the third snap-fit portion 51, which can avoid the problem that if both places fit in, the joint surface of the bearing split will be too constrained and unable to be assembled.

[0045] As attached Figure 6-7 As shown, the oblique groove 4114 is connected to the first L-shaped hook groove 4113, and the oblique groove 4114 and the first L-shaped hook groove 4113 are arranged toward the outside of the first bearing sub-body 4; the flat groove 4124 is connected to the second L-shaped hook groove 4123, and the flat groove 4124 and the second L-shaped hook groove 4123 are arranged toward the inside of the first bearing sub-body 4. The outward communication between the oblique groove 4114 and the first L-shaped hook groove 4113 forms a guide channel, facilitating the sliding and positioning of the second clamping block 4122 of the third clamping portion 51; the flat groove 4124 and the second L-shaped hook groove 4123 form a guide channel, facilitating the sliding and positioning of the first clamping block 4112 of the third clamping portion 51. This complementary internal and external guide design provides the clamping unit with a limiting function, simplifying assembly operations while significantly improving clamping reliability.

[0046] As attached Figure 11-13As shown, the bearing cover 200 is a stamped, integrally formed part. The bearing cover 200 includes a ball bearing cover 6 that accommodates the free rotation of the spindle ball bearing 100. The inner surface of the ball bearing cover 6 is a spherical surface adapted to the spindle ball bearing 100. The ends of the ball bearing cover 6 are rounded to prevent the spindle ball bearing 100 from being scratched by the sharp corners of the supporting spherical surface 94 while rotating on the cover, thereby preventing damage to the appearance of the spindle ball bearing 100. The ends of the ball bearing cover 6 smoothly transition and tighten inward to form a left hanging ear 7 and a right hanging ear 8. The left hanging ear 7 includes a first left flat plate 71 and a second left flat plate 72, with a left assembly gap 73 formed between them. The right hanging ear 8 includes a first right flat plate 81 and a second right flat plate 82, with a right assembly gap 83 formed between them.

[0047] In the present invention, the bearing seat 300 includes a first bearing support 9 and a second bearing support 10 that abut against each other. The back-to-back installation method of the first bearing support 9 and the second bearing support 10 improves the overall compressive strength and torsional resistance of the bearing seat 300 compared to the use scenario of a single bearing seat independent support. The first bearing support 9 includes a Y-shaped back plate 91, which is provided with a left insert plate 92 inserted into the left assembly gap 73 and a right insert plate 93 inserted into the right assembly gap 83. A supporting spherical surface 94 is formed between the left insert plate 92 and the right insert plate 93 to support the spindle ball bearing 100. The supporting spherical surface 94 is a stamped half-spherical surface 94, with rounded corners at the end surface to prevent the spindle ball bearing 100 from being scratched by the supporting spherical surface 94 while rotating on the supporting spherical surface 94, thereby damaging the appearance of the spindle ball bearing 100. The supporting spherical surface 94 has open flanges on both sides to prevent the spindle ball bearing 100 from being pinned by the spherical molding errors of the supporting spherical surface 94 when rotating within the bearing seat 300. The structure of the second bearing support 10 is the same as that of the first bearing support 9.

[0048] In the present invention, the first left plate 71 is provided with a first left punching hole 711, the second left plate 72 is provided with a second left punching hole, the left inserting plate 92 is provided with a first left deep-drawn circular groove 921, and a third left punching hole 922 is provided in the first left deep-drawn circular groove 921; the first right plate 81 is provided with a first right punching hole 811, the second right plate 82 is provided with a second right punching hole, the right inserting plate 93 is provided with a first right deep-drawn circular groove 931, and a third right punching hole 932 is provided in the first right deep-drawn circular groove 931; The fastener 400 includes a first flange bolt fastening assembly 401 and a second flange bolt fastening assembly 402. The first flange bolt fastening assembly 401 cooperates with the first left punching hole 711, the third left punching hole 922, and the second left punching hole to lock the left hanging ear 7 and the left insert plate 92; the second flange bolt fastening assembly 402 cooperates with the first right punching hole 811, the third right punching hole 932, and the second right punching hole to lock the right hanging ear 8 and the right insert plate 93, thereby realizing a detachable connection between the bearing flip cover 200 and the bearing seat 300. The backs of the first left-drawn circular groove 921 of the first bearing support 9 and the first right-drawn circular groove 931 of the second bearing support 10 abut against each other. The backs of the first right-drawn circular groove 931 of the first bearing support 9 and the first left-drawn circular groove 921 of the second bearing support 10 abut against each other, eliminating the gap between the upper portions of the first bearing support 9 and the second bearing support 10 when they are installed in a back-to-back manner and locked on the column. This avoids deformation and displacement of the ball bearing support surface caused by the gap after back-to-back installation and locking, further ensuring that the rotational fit of the spindle ball bearing 100 on the bearing seat 300 is not affected. The double Y-shaped back plate 91 adopts local deep drawing at the back-to-back interlocking point to avoid local deformation of the bearing support after interlocking due to the existence of back-to-back gap, which weakens the overall rigidity.

[0049] In the present invention, a first through hole 95 for assembling the drive shaft ball bearing is formed through the middle of the Y-shaped back plate 91. The shape of the first through hole 95 is the same as that of the drive shaft ball bearing and can be a hole of any form as long as it is consistent with the cross-section of the drive shaft ball bearing, so that the drive shaft ball bearing can rotate freely in any direction to adapt to the installation requirements of photovoltaic brackets on different slopes; the design of the first through hole 95 makes it possible to install the drive shaft ball bearing without the need for an independent drive shaft ball bearing seat 300.

[0050] In the present invention, a second left-drawn circular groove 96 is formed between the first through hole 95 and the third left punching hole 922, and a fourth left punching hole 97 is provided in the second left-drawn circular groove 96. A second right-drawn circular groove 98 is formed between the first through hole 95 and the third right punching hole 932, and a fourth right punching hole 99 is provided in the second right-drawn circular groove 98. The fastener 400 also includes a third flange bolt fastening assembly 403 and a fourth flange bolt fastening assembly 404. The third flange bolt fastening assembly 403 is locked in cooperation with the fourth left punching hole 97 of the first bearing support 9 and the fourth right punching hole 99 of the second bearing support 10, and the fourth flange bolt fastening assembly 404 is locked in cooperation with the fourth right punching hole 99 of the first bearing support 9 and the fourth left punching hole 97 of the second bearing support 10. The design of the second left drawn circular groove 96, the second right drawn circular groove 98 and the punching hole is used to install the third flange bolt fastening assembly 403 and the fourth flange bolt fastening assembly 404, which can not only make the two bearing supports form a whole, but also make the fourth left punching hole 97 and the fourth right punching hole 99 fit more compactly after the bearing supports are combined, thereby reducing the inner spherical surface error formed by the combination, and thereby reducing the movement of the transmission shaft ball bearing in the first through hole 95.

[0051] In the present invention, the left and right sides of the Y-shaped backplate 91 are formed with left and right flanges 911 and 912, respectively. These flanges enhance structural rigidity while improving the bracket's wind resistance. They also facilitate maintenance after the bearing flap 200 is opened, facilitating maintenance while also enhancing overall structural strength. The left and right flanges 911 and 912 leave a certain amount of space from the top of the Y-shaped backplate 91, facilitating subsequent maintenance of the spindle or spindle ball bearings 100 after opening the bearing flap 200.

[0052] In the present invention, a letter symbol reinforcement rib 913 is provided below the first through hole 95 , which not only strengthens the strength of the Y-shaped back plate 91 which would otherwise be weakened after punching, but also takes into account the uniqueness and aesthetics of the appearance of the Y-shaped back plate 91 .

[0053] In the present invention, two vertical strip holes 914 are provided below the letter symbol reinforcement rib 913. The vertical strip holes 914 are located at the bottom of the Y-shaped back plate 91 and are used to lock the fasteners 400, playing the role of fixing the bearing seat 300 device on the column; the vertical strip holes 914 can meet the height adjustment of the Y-shaped back plate 91 in the vertical direction of the column; the horizontal strip holes are opened on the column to meet the free adjustment of the Y-shaped back plate 91 in the horizontal direction of the column; the design of the double vertical strip holes 914, combined with the double horizontal strip holes on the column, does not require other adjustment parts, and can easily meet the free adjustment in the horizontal and vertical directions, solving the problems of redundant parts of the bearing seat 300 device and cumbersome installation and debugging steps, and improving the convenience of installation and debugging.

[0054] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A plum blossom bearing system for a solar photovoltaic tracking bracket, comprising a spindle ball bearing; characterized in that: The spindle ball bearing includes a first end face and a second end face, and a polygonal cavity for the spindle to pass through is formed from the first end face to the second end face. The first end face is provided with a first groove in the inner corner area of the polygonal cavity, and the second end face is provided with a second groove in the inner corner area of the polygonal cavity.

2. The plum blossom bearing system for a solar photovoltaic tracking bracket according to claim 1, characterized in that: The polygonal cavity is any one of a regular octagonal through-hole cavity, a regular heptagonal through-hole cavity, a regular hexagonal through-hole cavity, a regular pentagonal through-hole cavity, and a regular quadrilateral through-hole cavity.

3. The plum blossom bearing system for a solar photovoltaic tracking bracket according to any one of claims 1 to 2, characterized in that: The spindle ball bearing includes a first bearing split and a second bearing split that can be engaged with each other; the first bearing split is formed with a first half through-groove, and the second bearing split is formed with a second half through-groove; after the first bearing split and the second bearing split are engaged, the first half through-groove and the second half through-groove form a polygonal cavity; One end of the first bearing split is fixed with a first snap portion, and the other end is fixed with a second snap portion; one end of the second bearing split is fixed with a third snap portion that cooperates with the first snap portion, and the other end is fixed with a fourth snap portion that cooperates with the second snap portion; the structures of the second snap portion, the third snap portion, and the fourth snap portion are all the same as those of the first snap portion.

4. The plum blossom bearing system for a solar photovoltaic tracking bracket according to claim 3, characterized in that: The first buckle portion includes a first buckle unit and a second buckle unit; The first buckle unit includes a first connecting block, a first clamping block, and a first L-shaped hook groove. The surface of the first clamping block is sequentially formed with an oblique groove, a first arc transition surface, and a first oblique boss from the inside to the outside. One side of the first connecting block and the first clamping block is integrally provided with the first bearing body, and the other side is integrally provided with the second connecting block. The second snap-fit unit includes a second connecting block, a second snap-fit block and a second L-shaped hook groove; the surface of the second snap-fit block is formed with a flat groove, a second arc transition surface and a second inclined boss from the inside to the outside; the projection surface of the second snap-fit unit on the first snap-fit unit is located in the area of the first L-shaped hook groove.

5. The plum blossom bearing system for a solar photovoltaic tracking bracket according to claim 4, characterized in that: The oblique groove is connected to the first L-shaped hook groove, and the oblique groove and the first L-shaped hook groove are arranged toward the outside of the first bearing split; the flat groove is connected to the second L-shaped hook groove, and the flat groove and the second L-shaped hook groove are arranged toward the inside of the first bearing split.

6. The plum blossom bearing system for a solar photovoltaic tracking bracket according to any one of claims 1-2, 4-5, characterized in that: It also includes a bearing flap and a bearing seat. The bearing seat and the bearing flap are detachably connected by fasteners. When the bearing seat and the bearing flap are covered, an installation cavity for installing the main shaft ball bearing is formed.

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