Main beam and bearing assembly of photovoltaic tracking support and photovoltaic tracking support

Abstract

The embodiment of the utility model provides a main beam and bearing assembly of a photovoltaic tracking support and the photovoltaic tracking support, the main beam and bearing assembly of the photovoltaic tracking support comprises a bearing seat and a circular tube main beam, the bearing seat is used for being rotatably installed on a stand column of the photovoltaic tracking support, and the bearing seat is provided with a through insertion hole; the circular tube main beams are inserted into the insertion holes; and the circular tube main beam is connected with the bearing seat through the limiting piece. According to the technical scheme, the circular tube main beam and the bearing seat can be fixedly connected through the limiting piece, when the circular tube main beam rotates, the limiting piece drives the bearing seat to rotate, and therefore synchronous rotation of the circular tube main beam and the bearing seat is guaranteed, and the bearing seat can be prevented from being damaged while the excellent torsion resistance of the circular tube main beam is guaranteed. And the problem of abrasion caused by relative rotation between the circular tube main beam and the bearing seat is solved, and the service life of the bearing seat and the circular tube main beam is greatly prolonged.

Description

Technical Field

[0001] This application relates to the technical field of photovoltaic brackets, and in particular, to a main beam and bearing assembly of a photovoltaic tracking bracket and a photovoltaic tracking bracket. Background Art

[0002] At present, as a clean energy source, solar photovoltaic power generation is highly regarded globally and has received strong support and development. Among them, the photovoltaic tracking bracket, as an important support system for photovoltaic modules in a solar power station, is a support component used to assist the photovoltaic modules to capture the incident solar energy to the maximum extent, thereby increasing the solar radiation received by the photovoltaic modules and effectively improving the power generation of the modules.

[0003] The photovoltaic tracking bracket generally includes a main beam, a column, and a slewing drive. The main beam is fixed on the column through a bearing seat, and the slewing drive is used to drive the main beam to rotate, thereby driving the photovoltaic modules installed on the main beam to rotate. Since the main beam with a circular tube structure has great advantages in torsional resistance performance when the photovoltaic tracking bracket is in operation, the main beam of the photovoltaic tracking bracket generally adopts a circular tube structure. However, the main beam with a circular tube structure will rotate relative to the bearing seat, resulting in wear of the circular tube main beam and the bearing seat.

[0004] It should be noted that the above content is not necessarily prior art and does not limit the patent protection scope of this application. Summary of the Utility Model

[0005] The embodiments of this application provide a main beam and bearing assembly of a photovoltaic tracking bracket and a photovoltaic tracking bracket to solve or alleviate one or more of the above technical problems.

[0006] As the first aspect of the embodiments of this application, the embodiments of this application provide a main beam and bearing assembly of a photovoltaic tracking bracket, including:

[0007] A bearing seat for rotatably mounting on the column of the photovoltaic tracking bracket, and the bearing seat has a through insertion hole;

[0008] A circular tube main beam inserted into the insertion hole; the circular tube main beam is connected to the bearing seat through a limiting member.

[0009] Optionally, the bearing seat is mounted on the column of the photovoltaic tracking bracket through a bearing mounting seat, and the bearing mounting seat has a through mounting hole; the bearing seat is located in the mounting hole and is rotatably connected to the bearing mounting seat;

[0010] A limiting tab is provided on the bearing mounting seat, and the limiting tab is used to control the rotation range of the bearing seat on the bearing mounting seat.

[0011] Optionally, the bearing mount includes a mounting base and a mounting fixing seat, and the mounting base and the mounting fixing seat enclose to form the mounting hole; a limiting groove is formed on one side of the bearing seat facing the mounting fixing seat;

[0012] The mounting base is used for mounting on the column; the limiting flap is arranged on one side of the mounting fixing seat facing the mounting base, and the limiting flap is movably located in the limiting groove.

[0013] Optionally, the mounting base includes fixing bolts, a first mounting seat and a second mounting seat arranged in parallel, and a part of the column is located between the first mounting seat and the second mounting seat; the fixing bolts sequentially pass through the first mounting seat, the column and are connected to the second mounting seat.

[0014] Optionally, a first limiting platform and a second limiting platform are oppositely arranged on the outer peripheral surface of the first bearing ring, and a part of the bearing mount is located between the first limiting platform and the second limiting platform.

[0015] Optionally, a relief hole is formed on the limiting flap, and the end of the limiting member located in the limiting groove passes through the relief hole.

[0016] Optionally, the bearing seat includes a first bearing ring and a second bearing ring, and the first bearing ring and the second bearing ring enclose to form the insertion hole;

[0017] The first bearing ring is rotatably arranged on the bearing mount;

[0018] The limiting groove is formed on one side of the second bearing ring away from the first bearing ring; the limiting flap is movably arranged in the limiting groove, and the limiting flap can be in contact with the inner wall of the limiting groove; the limiting member is arranged in the limiting groove and is used for fixedly connecting the second bearing ring and the circular tube main beam.

[0019] Optionally, a plurality of through weight-reducing holes are formed on the side surface of the first bearing ring.

[0020] Optionally, the outer perimeter of the bearing seat is C, the outer perimeter of the first bearing ring is greater than 1 / 2C and less than 2 / 3C, and the outer perimeter of the second bearing ring is greater than 1 / 3C and less than 1 / 2C.

[0021] As the first aspect of the embodiments of the present application, the embodiments of the present application provide a photovoltaic tracking bracket, including a column and the main beam and bearing assembly of the photovoltaic tracking bracket as described above, and the bearing seat is arranged on the column.

[0022] The embodiments of the present application adopting the above technical solutions may include the following advantages:

[0023] The circular tube main beam and the bearing seat are fixedly connected through a limiting member. When the circular tube main beam rotates, the limiting member drives the bearing seat to rotate, thereby ensuring the synchronous rotation of the circular tube main beam and the bearing seat. Furthermore, while ensuring the excellent torsional resistance of the circular tube main beam, the problem of wear caused by relative rotation between the circular tube main beam and the bearing seat is also improved, greatly increasing the service life of the bearing seat and the circular tube main beam. Brief Description of the Drawings

[0024] In the drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0025] Figure 1 is an exploded view of the photovoltaic tracking bracket provided by an embodiment of the present application.

[0026] Figure 2 is a schematic structural diagram of the first bearing ring of the photovoltaic tracking bracket provided by an embodiment of the present application.

[0027] Figure 3 is a schematic structural diagram of the second bearing ring of the photovoltaic tracking bracket provided by an embodiment of the present application.

[0028] Description of Reference Numerals:

[0029] 1, column; 21, insertion hole; 22, first bearing ring; 221, weight reduction hole; 222, first limiting platform; 223, second limiting platform; 23, second bearing ring; 231, limiting groove; 3, circular tube main beam; 4, limiting member; 51, mounting hole; 52, limiting retaining piece; 521, relief hole; 53, mounting base; 531, fixing bolt; 532, first mounting seat; 533, second mounting seat; 54, mounting fixing seat. Detailed Description of the Embodiments

[0030] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0031] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0032] Next, exemplary embodiments according to this application will be described in more detail with reference to the accompanying drawings. It should be noted that these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein.

[0033] As Figures 1 to 3 shown, as the first aspect of the present utility model, the main beam and the bearing assembly of the photovoltaic tracking bracket may include a circular tube main beam 3, a bearing seat and a bearing mounting seat. The bearing mounting seat is used to be mounted on the column 1. The bearing seat is rotatably arranged in the bearing mounting seat, and the circular tube main beam 3 passes through the bearing seat, and the circular tube main beam 3 rotates synchronously with the bearing seat.

[0034] The bearing seat has a through insertion hole 21, and the circular tube main beam 3 is inserted into the insertion hole 21. And, the circular tube main beam 3 is fixedly connected to the bearing seat through a limiting member 4, so that the circular tube main beam 3 and the bearing seat move synchronously.

[0035] In this embodiment, the circular tube main beam 3 is adopted. The geometric shape of the circular tube main beam 3 makes the stress distribution more uniform during torsional loading, and there will be no stress concentration phenomenon at the corner parts of the special-shaped tube, thereby improving the anti-torsion performance. The circular tube main beam 3 and the bearing seat are fixedly connected through the limiting member 4. When the circular tube main beam 3 rotates, the limiting member 4 drives the bearing seat to rotate, so as to ensure the synchronous rotation of the circular tube main beam 3 and the bearing seat. Furthermore, while ensuring the excellent anti-torsion performance of the circular tube main beam 3, the problem of wear caused by relative rotation between the circular tube main beam 3 and the bearing seat is also improved, greatly improving the service life of the bearing seat and the circular tube main beam 3.

[0036] In an alternative embodiment, the bearing seat is rotatably mounted on the column 1 of the photovoltaic tracking bracket through a bearing mounting seat. The bearing mounting seat is fixed on the column 1 by bolts, and the bearing mounting seat has a through mounting hole 51. The bearing seat is located in the mounting hole 51 and is rotatably connected to the bearing mounting seat. A limit retaining piece 5252 is provided on the bearing mounting seat, and the limit retaining piece 5252 is used to control the rotation range of the bearing seat on the bearing mounting seat.

[0037] In this embodiment, the bearing mounting seat is arranged on the column 1, and the bearing seat is rotatably arranged in the mounting hole 51, thereby realizing the rotational mounting of the bearing seat on the column 1. In the traditional technology, only the driving mechanism is relied on to maintain the torque in the strong wind protection state, and the force is relatively large, so the requirements for the torque maintaining and strength of the driving are relatively high. For a whole row of brackets with a longer length, only the torque of the driving node is relied on to maintain, and the wind resistance stability and reliability of the photovoltaic tracking bracket are relatively poor. In the embodiment of the present application, due to the limiting effect of the limit retaining piece 5252 on the bearing seat, when the bearing seat rotates to a large angle, the limit retaining piece 52 will produce a limiting and torque providing effect on it, so that the bearing seat node also plays a role in torque maintaining, improving the stability and reliability of the photovoltaic tracking bracket in the strong wind protection state.

[0038] In an alternative embodiment, the bearing mounting seat includes a mounting base 53 and a mounting fixing seat 54. The mounting base 53 is used for mounting on the column 1, and the mounting fixing seat 54 is connected to the mounting base 53 by screws. The mounting base 53 and the mounting fixing seat 54 enclose to form the mounting hole 51. A limiting groove 231 is formed on one side of the bearing seat facing the mounting fixing seat 54. The limit retaining piece 52 is arranged on one side of the mounting fixing seat 54 facing the mounting base 53, and the limit retaining piece 52 is movably located in the limiting groove 231. In the embodiment of the present application, the middle part of the mounting fixing seat 54 is recessed downward to form the limit retaining piece 52. Therefore, the limit retaining piece 52 and the mounting fixing seat 54 are integrally formed. The integrally formed limit retaining piece 52 and the mounting fixing seat 54 have a simple structure and are simple to prepare, and only a simple stamping process is required for mass production, with a relatively low cost.

[0039] In this embodiment, the bearing mounting seat is arranged in a split manner. During the installation process, first fix the mounting base 53 on the column 1, then rotatably arrange the bearing seat on the mounting base 53, and then connect the mounting fixing seat 54 to the mounting base 53, so that the bearing seat is rotatably arranged between the mounting fixing seat 54 and the mounting base 53, realizing the rapid and convenient installation of the bearing seat and also facilitating the later maintenance.

[0040] In an alternative embodiment, the mounting base 53 includes fixing bolts 531, and a first mounting seat 532 and a second mounting seat 533 arranged in parallel. The first mounting seat 532 and the second mounting seat 533 are symmetrically mounted on both sides of the web of the column 1, that is, the web of the column 1 is located between the first mounting seat 532 and the second mounting seat 533. Then, the fixing bolts 531 are sequentially passed through the first mounting seat 532, the column 1 and connected to the second mounting seat 533.

[0041] In this embodiment, the mounting base 53 adopts a split design of the first mounting seat 532 and the second mounting seat 533, which facilitates the quick installation of the mounting base 53 onto the column 1. And by clamping the web of the column 1 between the first mounting seat 532 and the second mounting seat 533 and then connecting them through the fixing bolts 531, the mounting base 53 is more stably fixed on the column 1.

[0042] In an alternative embodiment, the bearing seat includes a first bearing ring 22 and a second bearing ring 23. Both the first bearing ring 22 and the second bearing ring 23 are arc-shaped plate structures. The first bearing ring 22 and the second bearing ring 23 enclose to form a plug hole 21. The first bearing ring 22 is rotatably arranged on the bearing mounting seat. A limiting groove 231 is opened on the side of the second bearing ring 23 away from the first bearing ring 22. A limiting tab 5252 is movably arranged in the limiting groove 231, and one end of the limiting tab 5252 away from the mounting and fixing seat 54 abuts against the bottom of the limiting groove 231. When the circular tube main beam 3 drives the second bearing ring 23 to rotate to the maximum angle, the limiting tab 5252 can abut against the side wall of the limiting groove 231. A limiting member 4 is arranged in the limiting groove 231 for fixedly connecting the second bearing ring 23 and the circular tube main beam 3. In the embodiment of the present application, the limiting member 4 can be a screw.

[0043] In this embodiment, the bearing seat adopts a split design, which facilitates the quick installation of the bearing seat and also facilitates the connection of the second bearing ring 23 and the circular tube main beam 3 through the limiting member 4, so as to realize the synchronous rotation of the bearing seat and the circular tube main beam 3. When the bearing seat rotates to a large angle, the limiting tab 52 rotates relative to the limiting groove 231 until the limiting tab 52 abuts against the side walls at both ends of the limiting groove 231. At this time, the bearing seat can no longer continue to rotate, that is, the bearing seat reaches the maximum rotation angle. At this time, the limiting tab 52 will have a limiting and torque-providing effect on the bearing seat, so that the bearing seat node also plays a role in torque maintenance, improving the stability and reliability of the photovoltaic tracking bracket in the strong wind protection state.

[0044] In an alternative embodiment, a relief hole 521 is formed in the limit retaining piece 5252. During the rotation of the second bearing ring 23, the end of the limiting member 4 located in the limiting groove 231 passes through the relief hole 521, and the limit retaining piece 52 will not interfere with the limiting member 4. The relief hole 521 formed in the limit retaining piece 52 will not interfere with the limiting member 4, facilitating the rotation of the limiting member 4 through the relief hole 521, thereby realizing the rotation of the second bearing ring 23.

[0045] In an alternative embodiment, a plurality of through weight reduction holes 221 are formed in the side surface of the first bearing ring 22, and the plurality of weight reduction holes 221 are evenly distributed on the side surface of the first bearing ring 22. Forming a plurality of weight reduction holes 221 on the side surface of the first bearing ring 22 can reduce the weight of the first bearing ring 22 and lower the production cost of the first bearing ring 22. In addition, the weight reduction holes 221 also facilitate the passage of wind, reducing the force of the wind on the first bearing ring 22 and further improving the stability of the first bearing ring 22 on the mounting base 53.

[0046] In an alternative embodiment, the outer circumference of the bearing seat is C, the outer circumference of the first bearing ring 22 is greater than 1 / 2C and less than 2 / 3C, and the outer circumference of the second bearing ring 23 is greater than 1 / 3C and less than 1 / 2C. In the embodiment of the present application, the outer circumference of the first bearing ring 22 is slightly less than 2 / 3C. Correspondingly, the outer circumference of the second bearing ring 23 is slightly greater than 1 / 3C, and the sum of the outer circumferences of the first bearing ring 22 and the second bearing ring 23 is C.

[0047] In this embodiment, when the outer circumference of the first bearing ring 22 is less than 1 / 2C, the rotation range of the first bearing ring 22 on the bearing mounting seat becomes smaller, and further, the rotation of the first bearing ring 22 on the bearing mounting seat is unstable, and the cooperation effect between the two is poor. When the outer circumference of the first bearing ring 22 is greater than 2 / 3C, correspondingly, the length of the second bearing ring 23 will be less than 1 / 3C, thereby causing the length of the limiting groove 231 to become shorter. Due to the limiting effect of the limit retaining piece 52, the rotation angle range of the circular tube main beam 3 will be restricted, resulting in a poor lighting effect of the photovoltaic module and a reduction in power generation. It should be noted that the limiting groove 231 is formed along the length direction of the second bearing ring 23, and the length of the limiting groove 231 is only slightly less than the length of the second bearing ring 23.

[0048] In an alternative embodiment, a first limiting platform 222 and a second limiting platform 223 are oppositely arranged on the outer peripheral surface of the first bearing ring 22, and a part of the bearing mounting seat is located between the first limiting platform 222 and the second limiting platform 223. The first limiting platform 222 and the second limiting platform 223 are mainly used to limit the first bearing ring 22 to prevent the first bearing ring 22 from slipping out of the bearing mounting seat during rotation, enabling it to rotate stably on the bearing mounting seat.

[0049] As a first aspect of the present utility model, the embodiments of the present application further provide a photovoltaic tracking bracket, which includes a column 1 and the main beam and bearing assembly of the photovoltaic tracking bracket as described in any of the above embodiments, and the bearing seat is arranged on the column 1.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0051] For the sake of convenience of description, the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "on top of other devices or structures" will be positioned as "below other devices or structures" or "beneath other devices or structures" afterwards. Thus, the exemplary term "above..." can include both "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the relative spatial descriptions used herein are made.

[0052] Unless otherwise clearly defined and limited, the terms "mount", "connect", "couple", "fix" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0053] Unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include contact between the first and second features not being direct but through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher level height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower level height than the second feature.

[0054] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0055] It should also be noted that the "one embodiment", "another embodiment", "embodiment" and the like mentioned in this specification refer to the specific features, structures or characteristics described in connection with that embodiment being included in at least one embodiment generally described in the present application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any embodiment, it is intended that the implementation of such feature, structure or characteristic in combination with other embodiments also falls within the scope of the present application.

[0056] In the above embodiments, the descriptions of the various embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0057] It should also be noted that the above are only the preferred embodiments of the present application, and do not limit the scope of patent protection of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the scope of patent protection of the present application.

Claims

1. A main beam and bearing assembly of a photovoltaic tracking bracket, characterized in that: include: A bearing seat, used for being rotatably mounted on a column (1) of a photovoltaic tracking bracket, the bearing seat having a through-hole (21); The circular tube main beam (3) is inserted into the insertion hole (21); the circular tube main beam (3) is connected to the bearing seat via a limiting member (4).

2. The main beam and bearing assembly of the photovoltaic tracking bracket according to claim 1 is characterized in that: The bearing seat is rotatably mounted on a column (1) of a photovoltaic tracking bracket via a bearing mounting seat, and the bearing mounting seat has a penetrating mounting hole (51); the bearing seat is located in the mounting hole (51) and is rotatably connected to the bearing mounting seat; A limit stopper (52) is arranged on the bearing mounting seat, and the limit stopper (52) is used to control the range of rotation of the bearing mounting seat on the bearing mounting seat.

3. The main beam and bearing assembly of the photovoltaic tracking bracket according to claim 2 is characterized in that: The bearing mounting seat comprises a mounting base (53) and a mounting fixing seat (54), wherein the mounting base (53) and the mounting fixing seat (54) enclose the mounting hole (51), and the mounting base (53) is used for mounting on the column (1); A limiting groove (231) is provided on a side of the bearing seat facing the mounting fixing seat (54); the limiting blocking piece (52) is arranged on a side of the mounting fixing seat (54) facing the mounting base (53), and the limiting blocking piece (52) is movably located in the limiting groove (231).

4. The main beam and bearing assembly of the photovoltaic tracking bracket according to claim 3 is characterized in that: The bearing seat comprises a first bearing ring (22) and a second bearing ring (23), wherein the first bearing ring (22) and the second bearing ring (23) enclose the insertion hole (21); The first bearing ring (22) is rotatably arranged on the bearing mounting seat; The limiting groove (231) is provided on a side of the second bearing ring (23) away from the first bearing ring (22); the limiting baffle (52) is movably arranged in the limiting groove (231), and the limiting baffle (52) can abut against the inner wall of the limiting groove (231); the limiting member (4) is arranged in the limiting groove (231) and is used for fixedly connecting the second bearing ring (23) and the round tube main beam (3).

5. The main beam and bearing assembly of the photovoltaic tracking bracket according to claim 3 or 4, characterized in that: The mounting base (53) comprises a fixing bolt (531) and a first mounting seat (532) and a second mounting seat (533) arranged in parallel, and a portion of the column (1) is located between the first mounting seat (532) and the second mounting seat (533); the fixing bolt (531) passes through the first mounting seat (532), the column (1) and the second mounting seat (533) in sequence to be connected.

6. The main beam and bearing assembly of the photovoltaic tracking bracket according to claim 3 or 4, characterized in that: The limiting blocking piece (52) is provided with a clearance hole (521), and the clearance hole (521) allows the end of the limiting member (4) located in the limiting groove (231) to pass through.

7. The main beam and bearing assembly of the photovoltaic tracking bracket according to claim 4, characterized in that: A plurality of weight-reducing holes (221) are formed through the side surface of the first bearing ring (22).

8. The main beam and bearing assembly of the photovoltaic tracking bracket according to claim 4, characterized in that: The outer circumference of the bearing seat is C, the outer circumference of the first bearing ring (22) is greater than 1 / 2C and less than 2 / 3C, and the outer circumference of the second bearing ring (23) is greater than 1 / 3C and less than 1 / 2C.

9. The main beam and bearing assembly of the photovoltaic tracking bracket according to claim 4, characterized in that: A first limiting platform (222) and a second limiting platform (223) are arranged opposite to each other on the outer peripheral surface of the first bearing ring (22), and a portion of the bearing mounting seat is located between the first limiting platform (222) and the second limiting platform (223).

10. A photovoltaic tracking bracket, characterized in that: It comprises a column (1) and a main beam and a bearing assembly of a photovoltaic tracking bracket as described in any one of claims 1 to 9, wherein the bearing seat is rotatably mounted on the column (1) through the bearing mounting seat.

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