Bearing assembly and photovoltaic tracking support

Abstract

The utility model relates to the technical field of photovoltaic supports, in particular to a bearing assembly and a photovoltaic tracking support, the bearing assembly comprises a bearing mounting base, a bearing outer ring, a bearing inner ring and a limiting piece, a mounting hole is formed in the bearing mounting base in a penetrating mode, the bearing outer ring is rotationally arranged in the mounting hole, a fixing hole is formed in the bearing outer ring in a penetrating mode, and the limiting piece is arranged in the bearing outer ring. The bearing inner ring is arranged in the fixing hole; the limiting piece is used for limiting the rotating angle of the bearing outer ring on the bearing mounting seat; one of the inner side face of the bearing outer ring and the outer side face of the bearing inner ring is provided with a spherical protrusion, the other one of the inner side face of the bearing outer ring and the outer side face of the bearing inner ring is provided with a spherical groove corresponding to the spherical protrusion, and the spherical protrusion extends into the spherical groove. The rotation angle of the bearing outer ring on the bearing mounting seat can be limited by arranging the limiting piece, so that the problem of potential safety hazards caused by overlarge rotation stroke of the bearing outer ring is reduced, and the angle of the main beam is adjusted by matching the spherical bulge with the spherical groove.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic support, and particularly to a bearing assembly and a photovoltaic tracking support. BACKGROUND

[0002] As a clean energy, solar photovoltaic power generation is highly praised and supported in the world. The photovoltaic tracking support as an important support system of the photovoltaic component of the solar power station is used to assist the support component of the photovoltaic component to capture the incident solar energy maximally, thereby increasing the solar radiation received by the photovoltaic component and effectively improving the power generation of the component.

[0003] The photovoltaic tracking support generally comprises a main beam, a column and a rotary driver. The main beam is fixed on the column through a bearing seat, and the rotary driver is used to drive the main beam to rotate, thereby driving the photovoltaic component installed on the main beam to rotate. If the installation site of the photovoltaic tracking support is a mountainous area with multiple slopes, the gravity component of the entire system along the direction of the main beam is entirely overcome by the hard connection of the bearing. The concentrated gravity component is not conducive to the lateral stress of the bearing. Long-term rotation under hard contact will cause fatigue or serious wear of the bearing structure. In addition, during the operation of the photovoltaic tracking support, the main beam will be abnormally rotated due to the influence of the external environment, which will cause the photovoltaic tracking support to twist and vibrate, thereby causing potential safety hazards of the photovoltaic tracking support.

[0004] It should be noted that the above content is not necessarily prior art, and is not used to limit the patent protection scope of the present application. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a bearing assembly and a photovoltaic tracking support to solve or alleviate one or more technical problems.

[0006] As a first aspect of the present application, the present application provides a bearing assembly, comprising:

[0007] A bearing mounting seat, wherein an installation hole is formed through the bearing mounting seat;

[0008] A bearing outer ring, wherein the bearing outer ring is rotationally arranged in the installation hole; a fixing hole is formed through the bearing outer ring;

[0009] A bearing inner ring, wherein the bearing inner ring is arranged in the fixing hole;

[0010] A limiting piece, wherein the limiting piece is used to limit the rotation angle of the bearing outer ring on the bearing mounting seat;

[0011] One of the inner side surface of the bearing outer ring and the outer side surface of the bearing inner ring is provided with a spherical convex, and the other is provided with a spherical groove corresponding to the spherical convex, the spherical convex extends into the spherical groove;

[0012] The bearing mounting seat, the bearing outer ring and the bearing inner ring are coaxial.

[0013] Optionally, a positioning hole is formed on the inner side of the bearing mounting seat; a limiting groove is formed on the outer circumferential surface of the bearing outer ring in the circumferential direction, and the limiting member extends into the positioning hole through the limiting groove and can move in the limiting groove;

[0014] The central angle of the corresponding circumferential circular arc of the limiting groove is less than 360°.

[0015] Optionally, a through hole is formed on the inner wall of the bearing outer ring corresponding to the fixing hole, and the through hole is in communication with the limiting groove; one end of the limiting member extends into the positioning hole through the through hole and the limiting groove in sequence, and the other end is located in the limiting groove; the bearing inner ring is arranged in the fixing hole and used for limiting the limiting member in the limiting groove.

[0016] Optionally, the limiting member comprises a first limiting rod and a second limiting rod, one end of the first limiting rod is connected to one end of the second limiting rod, and the width of the first limiting rod is greater than the width of the second limiting rod.

[0017] The width of the through hole is greater than the width of the limiting groove, the width of the limiting groove is greater than the width of the first limiting rod, the width of the first limiting rod is greater than the width of the positioning hole, and the width of the positioning hole is greater than the width of the second limiting rod.

[0018] Optionally, the spherical groove is arranged on the inner side of the bearing outer ring, the spherical groove is in communication with the fixing hole, and the spherical convex is arranged on the outer side of the bearing inner ring.

[0019] The spherical groove extends through the inner wall of the fixing hole in the axial direction parallel to the fixing hole.

[0020] Optionally, the outer circumferential surface of the bearing outer ring is provided with limiting bosses on both side edges, the inner wall of the bearing mounting seat for forming the mounting hole is provided with a giving-up groove in communication with the mounting hole, and the limiting bosses are arranged corresponding to the giving-up groove; the limiting bosses rotate in the mounting hole through the giving-up groove.

[0021] The spacing of the limiting bosses on the two sides in the axial direction parallel to the mounting hole is equal to the width of the bearing mounting seat in the axial direction parallel to the mounting hole.

[0022] Optionally, the number of the limiting bosses is at least one set, and the limiting bosses are arranged at intervals on the outer circumferential surface of the bearing outer ring.

[0023] Optionally, the central angles of the corresponding circumferential arcs of the limiting grooves are all in the range of 60°-120°.

[0024] Optionally, the number of the spherical protrusions is at least one.

[0025] As a second aspect of the embodiments of the present application, the embodiments of the present application provide a photovoltaic tracking support, which comprises the bearing assembly as described above.

[0026] The technical solutions of the embodiments of the present application can have the following advantages:

[0027] The limiting member is arranged to limit the rotation angle of the bearing outer ring on the bearing mounting seat, so as to reduce the problem that the photovoltaic tracking support has safety hazards due to excessive rotation stroke of the bearing outer ring caused by external environmental influences. Meanwhile, the spherical protrusion extends into the spherical groove, and the two achieve spherical surface cooperation, so that the bearing inner ring and the bearing outer ring cooperate to adjust the angle of the main beam, and the rotation angle limitation of the bearing outer ring on the bearing mounting seat and the adjustment of the angle of the main beam are achieved independently, and the two do not interfere with each other. BRIEF DESCRIPTION OF DRAWINGS

[0028] In the drawings, like reference numerals designate like elements throughout the several views, unless otherwise specified. The drawings are not necessarily to scale, the emphasis instead being placed upon illustrating the principles of the application. It should be understood that the drawings are merely depictions of some embodiments of the application and that no limitations of the present application are meant to be implied therefrom.

[0029] Figure 1 FIG. 1 is a structural schematic diagram of a bearing assembly provided by an embodiment of the present application.

[0030] Figure 2 FIG. 2 is a structural schematic diagram of a bearing mounting seat of the bearing assembly provided by an embodiment of the present application.

[0031] Figure 3 FIG. 3 is a structural schematic diagram of a bearing outer ring of the bearing assembly provided by an embodiment of the present application.

[0032] Figure 4 FIG. 4 is a structural schematic diagram of another view of the bearing outer ring of the bearing assembly provided by an embodiment of the present application.

[0033] Figure 5Fig. 1 is a structural schematic diagram of a limiting piece of a bearing assembly provided by an embodiment of the present application.

[0034] Figure 6 Fig. 2 is a structural schematic diagram of a bearing inner ring of the bearing assembly provided by an embodiment of the present application.

[0035] Legend of reference signs:

[0036] 1, bearing mounting seat; 11, mounting hole; 12, positioning hole; 13, accommodating groove; 2, bearing outer ring; 21, fixing hole; 22, spherical groove; 23, limiting groove; 24, through hole; 25, limiting boss; 3, bearing inner ring; 31, spherical boss; 4, first limiting rod; 5, second limiting rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] Below, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments set forth herein.

[0040] As shown in Fig. 1, in a first aspect, an embodiment of the present application can provide a bearing assembly, the bearing assembly comprising: Figures 1-6

[0041] a bearing mounting seat 1, a mounting hole 11 being provided through the bearing mounting seat 1;

[0042] a bearing outer ring 2, the bearing outer ring 2 being rotationally arranged in the mounting hole 11; a fixing hole 21 being provided through the bearing outer ring 2; ​

[0043] The bearing inner ring 3 is arranged in the fixing hole 21.

[0044] The limiting piece is used for limiting the rotation angle of the bearing outer ring 2 on the bearing mounting seat 1.

[0045] The inner side surface of the bearing outer ring 2 and the outer side surface of the bearing inner ring 3 are provided with a spherical protrusion 31 and a spherical groove 22 corresponding to the spherical protrusion 31 respectively, and the spherical protrusion 31 extends into the spherical groove 22.

[0046] The bearing mounting seat 1, the bearing outer ring 2 and the bearing inner ring 3 are coaxially arranged.

[0047] In the embodiment, the rotation angle of the bearing outer ring 2 on the bearing mounting seat 1 is limited by the limiting piece, that is, the bearing outer ring 2 is circumferentially limited, so as to reduce the problem that the photovoltaic tracking support has a safety hazard due to excessive rotation stroke of the bearing outer ring 2 caused by external environment; meanwhile, the spherical protrusion 31 extends into the spherical groove 22, and the two are spherical matched, so that the bearing inner ring 3 and the bearing outer ring 2 are matched to adjust the angle of the main beam, improve the adaptability of the photovoltaic tracking support to the multi-gradient terrain, and the rotation angle limitation of the bearing outer ring 2 on the bearing mounting seat 1 and the angle adjustment of the main beam can be realized independently, and the two will not interfere with each other.

[0048] In the optional embodiment, the positioning hole 12 is arranged on the inner side of the mounting hole 11 of the bearing mounting seat 1; the limiting groove 23 is arranged on the outer circumferential surface of the bearing outer ring 2 in the circumferential direction, the limiting piece extends into the positioning hole 12 through the limiting groove 23 and can move in the limiting groove 23; wherein the central angle of the circumferential arc corresponding to the limiting groove 23 is less than 360°. For example, the central angle of the circumferential arc corresponding to the limiting groove 23 can be 20°, 40°, 60°, 90°, 120°, 180°, 240°, 320° or 350°.

[0049] In the embodiment, the limiting piece extends into the positioning hole 12 through the limiting groove 23, and the limiting piece can move from one end of the limiting groove 23 to the other end, so as to realize the circumferential limitation of the bearing outer ring 2; and the angle of the central angle of the circumferential arc corresponding to the limiting groove 23 is the maximum angle range of the rotation of the bearing outer ring 2 in the bearing mounting seat 1, and the central angle of the circumferential arc corresponding to the limiting groove 23 can be adjusted according to actual needs, so as to limit the rotation angle of the bearing outer ring 2.

[0050] In an optional embodiment, the bearing outer ring 2 is provided with a through hole 24 on the inner wall of the fixing hole 21, the through hole 24 is communicated with the limiting groove 23; one end of the limiting member is sequentially inserted into the positioning hole 12 through the through hole 24 and the limiting groove 23, and the other end is located in the limiting groove 23; the bearing inner ring 3 is arranged in the fixing hole 21, and is used for limiting the limiting member in the limiting groove 23. In the embodiment, the through hole 24 can be located in the middle of the limiting groove 23, and the positioning hole 12 is arranged at the bottom of the bearing mounting seat 1, so that the situation that the limiting member is separated from the positioning hole 12 is reduced.

[0051] In the embodiment, after the bearing outer ring 2 is installed on the bearing mounting seat 1, the bearing outer ring 2 is rotated, so that the through hole 24 is aligned with the positioning hole 12, then the limiting member is placed into the through hole 24, one end of the limiting member is inserted into the positioning hole 12, and the relative fixation of the limiting member and the bearing mounting seat 1 is realized; since the limiting groove 23 does not penetrate the bearing outer ring 2 in the radial direction of the bearing outer ring 2, the other end of the limiting member is located in the limiting groove 23 through the through hole 24, and can move in the limiting groove 23, so as to realize the circumferential limiting action on the bearing outer ring 2.

[0052] In an optional embodiment, the limiting member includes a first limiting rod 4 and a second limiting rod 5, one end of the first limiting rod 4 is connected with one end of the second limiting rod 5, and the width of the first limiting rod 4 is greater than the width of the second limiting rod 5; the width of the through hole 24 is greater than the width of the limiting groove 23, the width of the limiting groove 23 is greater than the width of the first limiting rod 4, the width of the first limiting rod 4 is greater than the width of the positioning hole 12, and the width of the positioning hole 12 is greater than the width of the second limiting rod 5. In the embodiment, the first limiting rod 4 and the second limiting rod 5 can be cylindrical rod structures.

[0053] In the embodiment, since the width of the through hole 24 is greater than the width of the limiting groove 23, the width of the limiting groove 23 is greater than the width of the first limiting rod 4, the width of the first limiting rod 4 is greater than the width of the positioning hole 12, and the width of the positioning hole 12 is greater than the width of the second limiting rod 5, when the through hole 24 is aligned with the positioning hole 12, the limiting member only needs to be placed into the through hole 24, finally the first limiting rod 4 is located in the limiting groove 23, and the second limiting rod 5 is located in the positioning hole 12, so that the installation is convenient and fast, the installation efficiency is greatly improved, and the circumferential limiting action on the bearing outer ring 2 is realized.

[0054] In an optional embodiment, the spherical groove 22 is arranged on the inner side of the bearing outer ring 2, the spherical groove 22 is communicated with the fixing hole 21, and the spherical convex 31 is arranged on the outer side of the bearing inner ring 3; wherein the spherical groove 22 penetrates the inner wall of the fixing hole 21 along the axial direction parallel to the fixing hole 21.

[0055] In the embodiment, since the spherical groove 22 penetrates the inner wall of the fixing hole 21 along the axial direction parallel to the fixing hole 21, the installation of the bearing inner ring 3 and the bearing outer ring 2 can be completed by only aligning the spherical convex 31 on the bearing inner ring 3 with the spherical groove 22 and then inserting the spherical convex 31 into the spherical groove 22; the bearing outer ring 2 and the bearing inner ring 3 rotate synchronously, and the bearing inner ring 3 can be slightly rotated in the bearing outer ring 2 along the axial direction perpendicular to the fixing hole 21 through the cooperation of the spherical convex 31 and the spherical groove 22, that is, the adjustment of the angle of the main beam in the bearing inner ring 3 is realized, so that the photovoltaic tracking support is more suitable for the topography of multiple slopes, the wear of the bearing assembly is reduced, and the service life of the bearing assembly is improved.

[0056] In the optional embodiment, the two side edges of the outer circumferential surface of the bearing outer ring 2 are provided with limiting bosses 25, and the inner wall for forming the mounting hole 11 on the bearing mounting seat 1 is provided with a relief groove 13 communicating with the mounting hole 11, and the relief groove 13 is correspondingly arranged with the limiting boss 25; the limiting boss 25 rotates in the mounting hole 11 by penetrating the relief groove 13; wherein the spacing of the two limiting bosses 25 in the axial direction parallel to the mounting hole 11 is equal to the width of the bearing mounting seat 1 in the axial direction parallel to the mounting hole 11.

[0057] In the embodiment, during the installation process of the bearing outer ring 2, the limiting boss 25 is corresponded with the relief groove 13, then the limiting boss 25 penetrates the relief groove 13, and then the bearing outer ring 2 is rotated, so that the bearing mounting seat 1 is located between the limiting bosses 25, thereby completing the installation of the bearing outer ring 2 and the bearing mounting seat 1, and the limiting boss 25 can realize the axial limiting action on the bearing outer ring 2.

[0058] In the optional embodiment, the number of limiting bosses 25 is at least one set, and the limiting bosses 25 are arranged on the outer circumferential surface of the bearing outer ring 2 at intervals. In the embodiment, the number of limiting bosses 25 is three sets, and the three sets of limiting bosses 25 can be arranged on the outer circumferential surface of the bearing outer ring 2 at intervals, and the multiple sets of limiting bosses 25 can further improve the circumferential limiting action on the bearing outer ring 2.

[0059] In the optional embodiment, the central angle of the circumferential arc corresponding to the limiting groove 23 ranges from 60° to 120°. For example, the central angle of the circumferential arc corresponding to the limiting groove 23 can be 60°, 90° or 120°. The number of degrees of the central angle of the circumferential arc corresponding to the limiting groove 23 is the maximum angle of rotation of the bearing outer ring 2, and is also the maximum working angle of the bearing outer ring 2, and will not affect the normal operation of the tracking support, so as to ensure the optimal power generation of the tracking support.

[0060] In an optional embodiment, the number of spherical protrusions 31 is at least one. The number of spherical protrusions 31 is consistent with the number of spherical grooves 22. In the embodiment of the present application, the number of spherical protrusions 31 is three, and the three spherical protrusions 31 are uniformly spaced on the outer circumferential surface of the bearing inner ring 3, and the inner wall of the fixing hole 21 of the bearing outer ring 2 is uniformly spaced to form three spherical grooves 22, and the three spherical grooves 22 and the three spherical protrusions 31 are respectively and correspondingly arranged. The plurality of spherical protrusions 31 can further improve the stability of the synchronous rotation of the bearing inner ring 3 and the bearing outer ring 2, and can further improve the stability of the angle adjustment of the main beam.

[0061] In a second aspect, the embodiments of the present application can also provide a photovoltaic tracking support, which comprises the bearing assembly according to any one of the above embodiments.

[0062] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0063] For the convenience of description, the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. 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 spatial relative descriptions used herein are interpreted accordingly.

[0064] Unless otherwise clearly indicated, the term "mounting", "connected", "connecting", "fixed", "fixedly connected", "connection", and the like should be construed broadly in accordance with the principles of equivalence in the art, for example, it can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection, or communication; can be direct connection, or indirect connection through intermediate medium, or internal connection of two elements, or interaction between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] Unless otherwise clearly indicated, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. "Below", "under" and "under" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0066] Unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the application. At the same time, it should be understood that the size of each part shown in the drawings is not drawn in accordance with the actual proportion relationship. The technology, method and equipment known to those skilled in the relevant art can not be discussed in detail, but under appropriate circumstances, the technology, method and equipment should be regarded as part of the authorized description. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0067] It should also be noted that "one embodiment", "another embodiment", "embodiment" and the like referred to in the specification mean that the specific features, structures or characteristics described in connection with the embodiment are included in at least one embodiment described in the general description. The same expression appears in several places in the specification does not necessarily refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in connection with any embodiment, it is claimed that the implementation of such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present application.

[0068] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0069] It should be further noted that the above is only the preferred embodiment of the present application, and does not limit the patent protection scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A bearing assembly characterized by, The bearing assembly comprises: a bearing mounting seat (1) having a mounting hole (11) formed therethrough; a bearing outer ring (2) rotatably arranged in the mounting hole (11); the bearing outer ring (2) has a fixing hole (21) formed therethrough; a bearing inner ring (3) arranged in the fixing hole (21); a limiting member for limiting the rotation angle of the bearing outer ring (2) on the bearing mounting seat (1); one of the inner side of the bearing outer ring (2) and the outer side of the bearing inner ring (3) is provided with a spherical protrusion (31), and the other is provided with a spherical groove (22) corresponding to the spherical protrusion (31); the spherical protrusion (31) extends into the spherical groove (22); wherein the bearing mounting seat (1), the bearing outer ring (2) and the bearing inner ring (3) are coaxially arranged.

2. The bearing assembly according to claim 1, wherein: the bearing mounting seat (1) has a positioning hole (12) formed on the inner side of the mounting hole (11); the outer circumferential surface of the bearing outer ring (2) is provided with a limiting groove (23) formed in the circumferential direction; the limiting member extends into the positioning hole (12) through the limiting groove (23) and can move in the limiting groove (23); wherein the central angle of the circumferential arc corresponding to the limiting groove (23) is less than 360°.

3. The bearing assembly according to claim 2, wherein: the inner wall of the fixing hole (21) of the bearing outer ring (2) is provided with a through hole (24) formed therethrough; the through hole (24) is in communication with the limiting groove (23); one end of the limiting member extends into the positioning hole (12) through the through hole (24) and the limiting groove (23) in sequence, and the other end is located in the limiting groove (23); the bearing inner ring (3) is arranged in the fixing hole (21) to limit the limiting member in the limiting groove (23).

4. The bearing assembly according to claim 3, wherein: the limiting member comprises a first limiting rod (4) and a second limiting rod (5); one end of the first limiting rod (4) is connected to one end of the second limiting rod (5); the width of the first limiting rod (4) is greater than the width of the second limiting rod (5); the width of the through hole (24) is greater than the width of the limiting groove (23); the width of the limiting groove (23) is greater than the width of the first limiting rod (4); the width of the first limiting rod (4) is greater than the width of the positioning hole (12); the width of the positioning hole (12) is greater than the width of the second limiting rod (5).

5. The bearing assembly according to claim 3, wherein: the spherical groove (22) is arranged on the inner side of the bearing outer ring (2); the spherical groove (22) is in communication with the fixing hole (21); the spherical protrusion (31) is arranged on the outer side of the bearing inner ring (3). The spherical groove (22) penetrates the inner wall of the fixing hole (21) along an axial direction parallel to the fixing hole (21).

6. The bearing assembly according to claim 1, wherein, Both sides of the outer circumferential surface of the bearing outer ring (2) are provided with limiting bosses (25), and the inner wall of the bearing mounting seat (1) for forming the mounting hole (11) is provided with a limiting slot (13) communicated with the mounting hole (11), and the limiting slot (13) is correspondingly provided with the limiting boss (25); the limiting boss (25) rotates in the mounting hole (11) through the limiting slot (13). The spacing of the limiting bosses (25) on both sides in the axial direction parallel to the mounting hole (11) is equal to the width of the bearing mounting seat (1) in the axial direction parallel to the mounting hole (11).

7. The bearing assembly according to claim 6, wherein, The number of the limiting bosses (25) is at least one set, and the limiting bosses (25) are spaced apart on the outer circumferential surface of the bearing outer ring (2).

8. The bearing assembly according to any one of claims 2-5, wherein, The central angle of the corresponding circumferential circular arc of the limiting slot (23) ranges from 60° to 120°.

9. The bearing assembly according to any one of claims 1-7, wherein, The number of the spherical protrusions (31) is at least one.

10. A photovoltaic tracking support, characterized in that, The photovoltaic tracking support comprises the bearing assembly according to any one of claims 1-9.

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