Bearing assembly and photovoltaic tracking support
By designing limiting grooves and limiting blocks on the bearings, the problem of abnormal rotation of the main beam of the photovoltaic tracking bracket under strong winds was solved, thus achieving stable operation and improved safety of the bracket.
Patent Information
- Application Number
- CN202520173313.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2035-01-26
AI Technical Summary
In strong winds, the main beam of the photovoltaic tracking bracket may rotate abnormally, causing torsional vibration, which poses a safety hazard.
A first limiting groove is made on the bearing, so that the limiting block on the bearing seat can slide in the limiting groove, restricting the abnormal rotation of the main beam. Through the cooperation of the limiting groove and the limiting block, the position of the bearing is stabilized and abnormal rotation is prevented.
This effectively reduces the safety hazards caused by abnormal rotation of the main beam, improves the reliability and stability of the photovoltaic tracking bracket, and ensures the normal operation of the bracket.
Smart Images
Figure CN223536758U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photovoltaic support technology, and in particular to a bearing assembly and a photovoltaic tracking bracket. Background Technology
[0002] Solar photovoltaic (PV) power generation, as a clean energy source, is highly regarded globally and has received strong support and development. PV tracking systems, as a crucial support system for PV modules in solar power plants, are used to assist PV modules in maximizing the capture of incident solar energy, thereby increasing the amount of solar radiation received by the PV modules and effectively improving their power generation.
[0003] A typical photovoltaic (PV) tracking system includes a main beam, a column, and a rotary actuator. The main beam is fixed to the column by bearings, and the rotary actuator drives the main beam to rotate, which in turn drives the PV modules mounted on the main beam to rotate. During operation, the main beam can be affected by external environmental factors, causing abnormal rotation. In strong winds, the wind can blow the solar panels, causing the main beam to rotate rapidly. This can lead to torsional vibrations in the PV tracking system, posing a safety hazard.
[0004] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Utility Model Content
[0005] This application provides a bearing assembly and a photovoltaic tracking bracket to solve or alleviate one or more of the technical problems mentioned above.
[0006] As a first aspect of the embodiments of this application, the embodiments of this application provide a bearing assembly, including:
[0007] The bearing housing has a through mounting hole.
[0008] The bearing is used to mount the main beam; the bearing is rotatably disposed in the mounting hole, and the bearing is coaxially arranged with the bearing housing;
[0009] The bearing has a first limiting groove along the circumferential direction and a first clearance groove along the axial direction, and the first clearance groove is connected to the first limiting groove.
[0010] A first limiting block is provided on the inner wall of the bearing housing forming the mounting hole. The first limiting block slides in the first limiting groove through the first clearance groove and can slide along the first limiting groove.
[0011] Optionally, the first limiting groove includes a first limiting sub-groove and a second limiting sub-groove arranged parallel to each other, and the first limiting sub-groove and the second limiting sub-groove are connected through the first clearance groove;
[0012] The first limiting block includes a first limiting sub-block and a second limiting sub-block arranged parallel to each other. The first limiting sub-block is slidably disposed in the first limiting sub-groove, and the second limiting sub-block is slidably disposed in the second limiting sub-groove.
[0013] Optionally, the bearing is provided with a first abutting strip in the circumferential direction. The first abutting strip is located between the first limiting sub-groove and the second limiting sub-groove, and the first clearance groove is used to separate the first abutting strip.
[0014] A first gap region is formed between the first limiting sub-block and the second limiting sub-block. The width of the first gap region is smaller than the width of the first abutting strip. The first abutting strip slides in the first gap region.
[0015] The first abutting strip slides and abuts against the inner wall of the mounting hole formed by the bearing seat.
[0016] Optionally, the bearing housing is further provided with a limit baffle to limit the bearing from sliding out along the axial direction.
[0017] Optionally, the limiting baffle is disposed on the side of the first limiting block away from the bearing seat, and the limiting baffle abuts against the side of the bearing.
[0018] Optionally, a limiting baffle is also hinged to the side of the bearing housing away from the limiting baffle, the limiting baffle being used to limit the bearing in the mounting hole.
[0019] Optionally, the bearing is further provided with a second limiting groove along the axial direction, and the bearing is provided with a second relief groove along the axial direction, the second relief groove communicating with the second limiting groove;
[0020] A second limiting block is provided on the inner wall of the bearing seat forming the mounting hole, and the second limiting block slides in the second limiting groove through the second clearance groove;
[0021] The first limiting groove and the second limiting groove are respectively provided, the first limiting block and the second limiting block are respectively provided, and the second limiting block can slide and contact the bottom wall of the second limiting groove.
[0022] Optionally, the central angles of the circumferential arcs corresponding to the first limiting groove and the second limiting groove are both in the range of 45° to 65°.
[0023] Optionally, the inner wall of the bearing forming the mounting hole is a concave spherical surface, and the outer surface of the bearing is a convex spherical surface, wherein the concave spherical surface and the convex spherical surface are adapted to each other.
[0024] As a second aspect of the present application, the present application provides a photovoltaic tracking bracket, which includes the bearing assembly as described above.
[0025] The embodiments of this application employing the above-described technical solution may have the following advantages:
[0026] By creating a first limiting groove on the bearing, the first limiting block on the bearing seat can slide in the first limiting groove without affecting the rotation of the main beam or the normal operation of the support. When the main beam rotates to its maximum angle, the first limiting block will contact the inner wall of the first limiting groove, thereby restricting the rotation trend of the main beam and effectively reducing the safety hazards caused by abnormal rotation of the main beam. Attached Figure Description
[0027] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.
[0028] Figure 1 This is a schematic diagram of the structure of the tracking bracket provided in the embodiment of this application.
[0029] Figure 2 This is an exploded view of the bearing assembly provided in the embodiments of this application.
[0030] Figure 3 This is a schematic diagram of the bearing housing of the bearing assembly provided in the embodiments of this application.
[0031] Figure 4 This is a schematic diagram of the bearing structure of the bearing assembly provided in the embodiments of this application.
[0032] Explanation of reference numerals in the attached figures:
[0033] 1. Bearing housing; 11. Mounting hole; 121. First limiting sub-block; 122. Second limiting sub-block; 13. First interval area; 14. Limiting baffle; 151. Third limiting sub-block; 152. Fourth limiting sub-block; 2. Bearing; 211. First limiting sub-groove; 212. Second limiting sub-groove; 22. First clearance groove; 23. First abutment strip; 241. Third limiting sub-groove; 242. Fourth limiting sub-groove; 25. Second clearance groove; 26. Second abutment strip; 27. Receiving hole; 3. Main beam; 4. Column. Detailed Implementation
[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The application will now be described in detail with reference to the accompanying drawings and embodiments.
[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0036] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. It should be understood that these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein.
[0037] like Figures 1-4 As shown, in a first aspect, embodiments of this application may provide a bearing assembly, which may include:
[0038] Bearing housing 1, with a through mounting hole 11;
[0039] Bearing 2 is used to install the main beam 3; bearing 2 is rotatably installed in the mounting hole 11, and bearing 2 is coaxial with bearing seat 1;
[0040] The bearing 2 has a first limiting groove in the circumferential direction and a first relief groove 22 in the axial direction. The first relief groove 22 is connected to the first limiting groove. The bearing seat 1 has a first limiting block on the inner wall of the mounting hole 11. The first limiting block passes through the first relief groove 22 in the first limiting groove and can slide along the first limiting groove.
[0041] In this embodiment, by opening a first limiting groove on the bearing 2, the first limiting block on the bearing seat 1 can slide in the first limiting groove. During the sliding of the first limiting block, the rotation of the main beam 3 will not be affected, and the normal operation of the support will not be affected. When the main beam 3 rotates to the maximum angle, the first limiting block will contact the inner wall of the first limiting groove, thereby restricting the rotation trend of the main beam 3 and effectively reducing the safety hazards caused by the abnormal rotation of the main beam 3.
[0042] It should be noted that when the main beam 3 rotates, the first limiting block can always slide within the first limiting groove and can slide in contact with the bottom wall of the first limiting groove until the first limiting block abuts against the inner wall of the first limiting groove, thus limiting the bearing 2 to its maximum working angle. The contact area between the first limiting block and the first limiting groove is relatively large, resulting in a strong limiting and locking force. The first limiting block can stably provide a stable limiting capability for the bearing 2. Furthermore, in this embodiment, the limiting effect on the bearing 2 is achieved simply by changing the structure, without the need for additional fasteners.
[0043] In an optional embodiment, the first limiting groove includes a first limiting sub-groove 211 and a second limiting sub-groove 212 arranged parallel to each other, and the first limiting sub-groove 211 and the second limiting sub-groove 212 are connected through a first clearance groove 22; the first limiting block includes a first limiting sub-block 121 and a second limiting sub-block 122 arranged parallel to each other, the first limiting sub-block 121 is slidably disposed in the first limiting sub-groove 211, and the second limiting sub-block 122 is slidably disposed in the second limiting sub-groove 212.
[0044] In this embodiment, since the first limiting sub-block 121 is located in the first limiting sub-groove 211 and the second limiting sub-block 122 is located in the second limiting sub-groove 212, the two limiting blocks further increase the contact area with the bearing 2, thereby providing a more stable limiting capability, greatly reducing the safety hazards caused by abnormal rotation of the bearing 2, and effectively improving the reliability of the bracket.
[0045] In an optional embodiment, the bearing 2 is provided with a first abutting strip 23 in the circumferential direction. The first abutting strip 23 is located between the first limiting sub-groove 211 and the second limiting sub-groove 212. The first clearance groove 22 is used to separate the first abutting strip 23. A first interval region 13 is formed between the first limiting sub-block 121 and the second limiting sub-block 122. The width of the first interval region 13 is smaller than the width of the first abutting strip 23. The first abutting strip 23 slides in the first interval region 13. The first abutting strip 23 slides and abuts against the inner wall of the mounting hole 11 formed by the bearing seat 1.
[0046] In this embodiment, the width of the first interval region 13 is smaller than the width of the first abutment strip 23. The first abutment strip 23 slides in the first interval region 13. On the one hand, the first interval region 13 allows the first abutment strip 23 to pass smoothly without interfering with the rotation of the bearing 2, thereby enabling the main beam 3 to rotate. On the other hand, since the first abutment strip 23 can slide in the first interval region 13 and slides and abuts against the inner wall of the mounting hole 11 formed by the first abutment strip 23 and the bearing seat 1, the first abutment strip 23 is limited between the first limiting sub-block 121 and the second limiting sub-block 122, thereby limiting the tendency of the bearing 2 to move along the axial direction when rotating in the bearing seat 1, reducing the risk of the bearing 2 detaching from the bearing seat 1, and improving the reliability of the bracket.
[0047] In an optional embodiment, a limiting baffle 14 is further provided on the bearing housing 1 to limit the bearing 2 from sliding out along the axial direction. The limiting baffle 14 can limit the bearing 2 in the bearing housing 1, reducing the risk that the bearing 2 will slide out of the bearing housing 1 along the axial direction during rotation.
[0048] In an optional embodiment, the limiting baffle 14 is disposed on the side of the first limiting block away from the bearing seat 1, and the limiting baffle 14 abuts against the side of the bearing 2.
[0049] In this embodiment, the limiting baffle 14 and the first limiting block are integrally formed, which facilitates production and reduces the number of mounting components of the bracket. It should be noted that since the bracket can be installed on a slope, when the bearing assembly is located at the lower part of the slope, the limiting baffle 14 is located on the downward-sloping side of the bearing seat 1, and the bearing 2 will only tend to move towards the lower part of the slope in the axial direction. The limiting baffle 14, by abutting against the bearing 2, can limit the downward movement of the bearing 2. Therefore, under such sloping terrain conditions, and with the bearing assembly installed at the lower part of the slope, it is only necessary to set the limiting baffle 14 on the downward-sloping side of the bearing seat 1 to limit the tendency of the bearing 2 to slide along the axial direction.
[0050] In an optional embodiment, a limiting baffle (not shown in the figure) is also hinged to the side of the bearing housing 1 away from the limiting baffle 14. The limiting baffle is used to limit the bearing 2 in the mounting hole 11.
[0051] In this embodiment, the limiting baffle is first moved aside to make way for the installation of the bearing 2. The first clearance groove 22 of the bearing 2 is aligned with the first limiting block. Then, the bearing 2 is placed into the mounting hole 11 of the bearing seat 1 to complete the pre-installation of the bearing 2 and the bearing seat 1. Then, the main beam 3 is inserted into the bearing 2. Due to the limiting effect of the limiting baffle 14, the bearing 2 will not move out of the bearing seat 1. Then, the hinged limiting baffle is reset so that the limiting baffle can abut against the bearing 2 and restrict the bearing 2 in the bearing seat 1.
[0052] In an optional embodiment, the bearing 2 is further provided with a second limiting groove along the axial direction, and the bearing 2 is provided with a second relief groove 25 along the axial direction, the second relief groove 25 communicating with the second limiting groove; a second limiting block is provided on the inner wall of the mounting hole 11 formed by the bearing seat 1, and the second limiting block slides in the second limiting groove through the second relief groove 25; wherein, the first limiting groove and the second limiting groove are provided correspondingly, the first limiting block and the second limiting block are provided correspondingly, and the second limiting block can slide and contact the bottom wall of the second limiting groove.
[0053] In this embodiment, the first limiting groove and the second limiting groove are arranged opposite to each other, and the opening lengths of the first limiting groove and the second limiting groove can be the same. The first limiting block slides in the first limiting groove through the first relief groove 22, and the second limiting block slides in the second limiting groove through the second relief groove 25. This greatly improves the stability of the bearing 2 rotating in the bearing seat 1, thereby improving the reliability of the bracket. At the same time, it also increases the limiting contact area between the first limiting block and the bearing 2, further improving the stability of limiting the bearing 2.
[0054] In some embodiments, the second limiting groove includes a third limiting sub-groove 241 and a fourth limiting sub-groove 242 arranged parallel to each other, and the third limiting sub-groove 241 and the fourth limiting sub-groove 242 are connected through a second clearance groove 25; the second limiting block includes a third limiting sub-block 151 and a fourth limiting block 152 arranged parallel to each other, the third limiting sub-block 151 is located in the third limiting sub-groove 241, and the fourth limiting block 152 is located in the fourth limiting sub-groove 242. The bearing 2 is provided with a second abutment strip 26 in the circumferential direction. The second abutment strip 26 is located between the third limiting sub-groove 241 and the fourth limiting sub-groove 242. The second clearance groove 25 is used to separate the second abutment strip 26. A second interval region is formed between the third limiting sub-block 151 and the fourth limiting sub-block 152. The width of the second interval region is smaller than the width of the second abutment strip 26, and the second abutment strip 26 slides in the second interval region. The second abutment strip 26 slides and abuts against the inner wall of the mounting hole 11 formed by the bearing seat 1. A limiting baffle 14 is also provided on the second limiting block to limit the axial direction of the bearing 2.
[0055] In an optional embodiment, the central angle of the circumferential arc corresponding to the first limiting groove and the second limiting groove is in the range of 45° to 65°.
[0056] In this embodiment, the central angles of the circumferential arcs corresponding to the first limiting groove and the second limiting groove can be the same, so that while limiting the bearing 2, there is no restriction on the maximum working angle of the bearing 2, that is, it will not affect the normal operation of the support and ensure the optimal power generation of the tracking support.
[0057] In an optional embodiment, the inner wall of the mounting hole 11 of the bearing 2 is a concave spherical surface, and the outer surface of the bearing 2 is a convex spherical surface, with the concave spherical surface and the convex spherical surface being adapted to each other.
[0058] In this embodiment, the concave spherical surface and the convex spherical surface are matched to reduce the frictional force of the bearing 2 rotating in the bearing housing 1, thereby reducing the wear between the bearing 2 and the bearing housing 1 and improving the service life of the bearing assembly.
[0059] Secondly, embodiments of this application can provide a photovoltaic tracking bracket, which includes a column 4 and a bearing assembly as described in any of the above embodiments. The bearing assembly includes a bearing seat 1 and a bearing 2, with the bearing 2 used to mount the main beam 3. A receiving hole 27 is provided through the bearing 2, and the main beam 3 is disposed in the receiving hole 27. The bearing 2 is rotatably disposed in the bearing seat 1, and the bearing seat 1 is mounted on the column 4.
[0060] In some embodiments, the bearing 2 can be a split design, comprising a first bearing sub-base and a second bearing sub-base, which together form a receiving hole 27. The split design of the bearing 2 facilitates production and makes it easier to install the main beam 3.
[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0062] For ease of description, directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom" generally indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the components themselves. For example, if a device in the drawings is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.
[0063] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0064] Unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0066] It should also be noted that the terms "one embodiment," "another embodiment," or "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this application.
[0067] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0068] It should also be noted that the above are merely preferred embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.
Claims
1. A bearing assembly, characterized in that, include: A bearing housing (1) is provided with a through mounting hole (11); The bearing (2) is used to install the main beam (3); the bearing (2) is rotatably disposed in the mounting hole (11), and the bearing (2) is coaxially disposed with the bearing seat (1); the bearing (2) has a first limiting groove in the circumferential direction, and the bearing (2) has a first clearance groove (22) in the axial direction, and the first clearance groove (22) is connected to the first limiting groove; The bearing housing (1) has a first limiting block on the inner wall forming the mounting hole (11). The first limiting block slides in the first limiting groove through the first clearance groove (22) and can slide along the first limiting groove.
2. The bearing assembly according to claim 1, characterized in that, The first limiting groove includes a first limiting sub-groove (211) and a second limiting sub-groove (212) arranged parallel to each other, and the first limiting sub-groove (211) and the second limiting sub-groove (212) are connected through the first clearance groove (22); The first limiting block includes a first limiting sub-block (121) and a second limiting sub-block (122) arranged parallel to each other. The first limiting sub-block (121) is slidably disposed in the first limiting sub-groove (211), and the second limiting sub-block (122) is slidably disposed in the second limiting sub-groove (212).
3. The bearing assembly according to claim 2, characterized in that, The bearing (2) is provided with a first abutting strip (23) in the circumferential direction. The first abutting strip (23) is located between the first limiting sub-groove (211) and the second limiting sub-groove (212). The first clearance groove (22) is used to separate the first abutting strip (23). A first gap region (13) is formed between the first limiting sub-block (121) and the second limiting sub-block (122). The width of the first gap region (13) is smaller than the width of the first abutting strip (23). The first abutting strip (23) slides in the first gap region (13). The first abutting strip (23) slides and abuts against the inner wall of the mounting hole (11) formed by the bearing seat (1).
4. The bearing assembly according to claim 1, characterized in that, The bearing housing (1) is also provided with a limiting baffle (14) to limit the bearing (2) from sliding out along the axial direction.
5. The bearing assembly according to claim 4, characterized in that, The limiting baffle (14) is disposed on the side of the first limiting block away from the bearing seat (1), and the limiting baffle (14) abuts against the side of the bearing (2).
6. The bearing assembly according to claim 4, characterized in that, A limiting baffle is also hinged to the side of the bearing housing (1) away from the limiting baffle (14), and the limiting baffle is used to limit the bearing (2) in the mounting hole (11).
7. The bearing assembly according to claim 1, characterized in that, The bearing (2) is also provided with a second limiting groove along the axial direction, and the bearing (2) is provided with a second relief groove (25) along the axial direction, and the second relief groove (25) is connected to the second limiting groove; A second limiting block is provided on the inner wall of the bearing seat (1) forming the mounting hole (11), and the second limiting block slides in the second limiting groove through the second relief groove (25); The first limiting groove and the second limiting groove are respectively provided, the first limiting block and the second limiting block are respectively provided, and the second limiting block can slide and contact the bottom wall of the second limiting groove.
8. The bearing assembly according to claim 7, characterized in that, The central angles of the circumferential arcs corresponding to the first and second limiting grooves are both in the range of 45° to 65°.
9. The bearing assembly according to claim 1, characterized in that, The inner wall of the bearing (2) forming the mounting hole (11) is a concave spherical surface, and the outer side of the bearing (2) is a convex spherical surface. The concave spherical surface and the convex spherical surface are adapted to each other.
10. A photovoltaic tracking bracket, characterized in that, The photovoltaic tracking bracket includes the bearing assembly as described in any one of claims 1-9.