CN219980730U - Purlin and photovoltaic support - Google Patents

Abstract

The utility model provides a purline which is used for fixing a photovoltaic module to a main shaft, and comprises a first connecting plate, a first fixing plate fixedly connected with the main shaft and a second fixing plate fixedly connected with the photovoltaic module; the first fixing plate extends perpendicularly from one end of the first connecting plate to one side of the first connecting plate, and the second fixing plate extends obliquely from the other end of the first connecting plate to the one side of the first connecting plate. The utility model also discloses a photovoltaic bracket which comprises the purline disclosed by the utility model. In addition, when the photovoltaic support is used for supporting the photovoltaic module, the photovoltaic module is obliquely arranged relative to the main shaft. The photovoltaic bracket is convenient to install, good in wind resistance and higher in unit area power generation amount of the photovoltaic module installed on the photovoltaic bracket.

Description

Purlin and photovoltaic support

Technical Field

The utility model relates to a purline and a photovoltaic bracket, and belongs to the field of photovoltaics.

Background

In the related art, the photovoltaic support is a flat uniaxial support. When using a flat single-axis support, several photovoltaic modules are fixed to the main axis in the aforementioned flat single-axis support. The spindle rotates to drive the photovoltaic module to rotate. And then, the surface of the photovoltaic module is enabled to track the east-west fall of the sun at a better illumination angle, so that higher generating capacity is obtained. However, in such a photovoltaic bracket, the photovoltaic module has no inclination angle in the north-south direction, which results in lower light receiving capacity when the solar altitude angle of the photovoltaic module is lower, and thus lower generated energy.

Disclosure of Invention

The object of the present utility model is to provide a purlin and a photovoltaic bracket to which a photovoltaic module is fastened obliquely to a main shaft when such a photovoltaic bracket is used. That is, the photovoltaic module has an inclination angle in the north-south direction, so that the generating capacity of the photovoltaic module is improved, the purline structure is stable, the manufacturing is convenient, the installation is easy, the photovoltaic bracket using the purline is simple in assembly, low in cost, good in wind resistance, strong in bending resistance and simple in installation and maintenance.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a purline for fixing a photovoltaic module to a main shaft, the purline comprising a first connecting plate, a first fixing plate fixedly connected with the main shaft, and a second fixing plate fixedly connected with the photovoltaic module; the first fixing plate extends perpendicularly from one end of the first connecting plate to one side of the first connecting plate, and the second fixing plate extends obliquely from the other end of the first connecting plate to the one side of the first connecting plate.

As a further improved technical scheme of the purline in the utility model, an angle formed between the second fixing plate and the first connecting plate is an obtuse angle.

As a further improved technical scheme of the purline in the utility model, the purline further comprises a bending part; the bending part bends from the first connecting plate to the one side of the first connecting plate.

As a further improved technical scheme of the purline in the utility model, the purline further comprises a flanging; the folded edge extends vertically from one side edge of the first fixing plate, and the folded edge and the first connecting plate are respectively located at two opposite ends of the first fixing plate.

In addition, the utility model also discloses a photovoltaic bracket, which is used for supporting a photovoltaic module and comprises a main shaft, a plurality of upright posts used for supporting the main shaft, and a first connecting piece and a second connecting piece which are obliquely arranged on the main shaft relative to the extending direction of the main shaft; the first connecting piece and the second connecting piece are positioned on two opposite sides of the photovoltaic module; the first connecting piece comprises a first purline, and the first purline is the purline disclosed by the utility model.

As a further improved technical scheme of the photovoltaic bracket, the second connecting piece comprises a second purline; the second purline comprises a second connecting plate, a third fixing plate fixedly connected with the main shaft, a fourth fixing plate fixedly connected with the photovoltaic module and a step part configured to limit the photovoltaic module; observing one end of the second purline, the second purline is Z-shaped: the third fixing plate is connected to one end of the second connecting plate, and the fourth fixing plate is connected to the other end of the second connecting plate through the step portion.

As a further improved technical scheme of the photovoltaic bracket, the first connecting piece further comprises a first U-shaped bolt, wherein the first U-shaped bolt surrounds the main shaft and is fixedly connected with the first fixing plate; and/or, the second connecting piece further comprises a second U-shaped bolt, and the second U-shaped bolt surrounds the main shaft and is fixedly connected with the third fixing plate.

As a further improved technical scheme of the photovoltaic bracket, the first connecting piece further comprises a first auxiliary connecting piece; the first auxiliary connecting piece comprises a first base plate, first side plates and first grooves, the first side plates extend from two sides of the first base plate vertically to the first base plate, the first grooves penetrate through the two first side plates, the first grooves are opened towards the main shaft, at least part of groove walls of the first grooves are abutted against the main shaft, and first U-shaped bolts wind the main shaft and penetrate through the first base plate and the first fixing plate; and/or the second connector further comprises a second auxiliary connector; the second auxiliary connecting piece comprises a second base plate, second side plates and second grooves, the second side plates extend from two sides of the second base plate vertically to the second base plate, the second grooves penetrate through the two second side plates, the second grooves are open towards the main shaft, at least part of groove walls of the second grooves are propped against the main shaft, and second U-shaped bolts wind the main shaft and penetrate through the second base plate and the third fixing plate.

As a further improved technical solution of the photovoltaic bracket in the present utility model, the first auxiliary connecting piece further includes a first fin, the first fin extends outwards from the top wall of the first groove along a direction perpendicular to the first side plate, and the first fin abuts against the main shaft; and/or the second auxiliary connecting piece further comprises a second fin, the second fin extends outwards from the top wall of the second groove along the direction perpendicular to the second side plate, and the second fin abuts against the main shaft.

As a further improved technical scheme of the photovoltaic bracket, the photovoltaic bracket further comprises a driving motor, a first speed reducer, a second speed reducer and a synchronous shaft; the first speed reducer is provided with a first input end, a first output end and a second output end; the first input end is in transmission connection with the output end of the driving motor, the first output end is in transmission connection with the main shaft, and the second output end is fixedly connected with one end of the synchronous shaft; the second speed reducer is provided with a second input end and a third output end; the other end of the synchronizing shaft is fixedly connected with the second input end, and the third output end is in transmission connection with the main shaft.

Compared with the related art, the utility model has the following advantages:

the purline disclosed by the utility model has the advantages of stable structure, convenience in manufacture, easiness in installation, good wind resistance, strong bending resistance, capability of conveniently knowing whether bolts are loosened or not through visual observation and simplicity in maintenance.

In the photovoltaic bracket disclosed by the utility model, the supporting heights of the first connecting piece and the second connecting piece are different, so that the installed photovoltaic module has a certain inclination angle in the north-south direction. And then the generated energy of the photovoltaic module is improved. The photovoltaic bracket using the purline disclosed by the utility model has the advantages of simpler assembly, more stable structure, good wind resistance, strong bending resistance and lower cost.

Drawings

Fig. 1 is a schematic structural view of an embodiment of a photovoltaic bracket in the present utility model.

Fig. 2 is a schematic front view of one embodiment of a photovoltaic bracket of the present utility model.

Fig. 3 is a partial enlarged view of a portion a in fig. 2.

Fig. 4 is a partial enlarged view of a portion B in fig. 2.

Fig. 5 is a schematic view of an assembled structure of the main shaft, the first connecting member, the second connecting member, and a photovoltaic module at a first angle.

Fig. 6 is a schematic view of an assembled structure of the main shaft, the first connecting member, the second connecting member, and one photovoltaic module at a second angle.

Fig. 7 is a schematic view of an assembled structure of the main shaft, the first connecting member, the second connecting member, and one photovoltaic module at a third angle.

Fig. 8 is a schematic front view of the spindle, the first connector, the second connector, and a photovoltaic module.

In fig. 9: a is a partial enlarged view of a portion C in fig. 8; b is an isolated schematic representation of the first purlin in a.

In fig. 10: c is a partial enlarged view of part D in fig. 8; d is a separate schematic representation of the second purlin in c.

Fig. 11 is an exploded view of an angle of the first connector.

Fig. 12 is an exploded view of another angle of the first connector.

Fig. 13 is an exploded view of an angle of the second connector.

Fig. 14 is an exploded view of another angle of the second connector.

Detailed Description

Exemplary embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. If there are several specific embodiments, the features in these embodiments can be combined with each other without conflict. When the description refers to the accompanying drawings, the same numbers in different drawings denote the same or similar elements, unless otherwise specified. What is described in the following exemplary embodiments does not represent all embodiments consistent with the utility model; rather, they are merely examples of apparatus, articles, and/or methods that are consistent with aspects of the utility model as set forth in the claims.

The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present utility model. As used in the specification and claims of the present utility model, the singular forms "a," "an," or "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that words such as "first," "second," and the like, used in the description and in the claims of the present utility model, do not denote any order, quantity, or importance, but rather are names used to distinguish one feature from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the terms "front," "rear," "upper," "lower," and the like are used herein for convenience of description and are not limited to a particular location or to a spatial orientation. The word "comprising" or "comprises", and the like, is an open-ended expression, meaning that elements appearing before "comprising" or "including", encompass the elements appearing after "comprising" or "including", and equivalents thereof, and not exclude that elements appearing before "comprising" or "including", may also include other elements. In the present utility model, if a plurality of the above-mentioned components are present, the meaning of the above-mentioned components is two or more.

In the figure, the A1-A1 direction is a first direction, and is also called a front-back direction in the description; the A2-A2 direction is a second direction, which is also referred to as a left-right direction in the description; the direction A3-A3 is the third direction, also referred to as the up-down direction in the description. The first direction, the second direction and the third direction are perpendicular to each other.

The present utility model discloses a purlin (i.e., first purlin 31) for securing a photovoltaic module 200 to a spindle 1.

Referring primarily to fig. 9 and 11, the first purlin 31 extends in the direction A1-A1. The first purlin 31 includes a first connection plate 311, a first fixing plate 312, and a second fixing plate 313.

The first fixing plate 312 extends perpendicularly from one end (e.g., lower end) of the first connection plate 311 to one side (e.g., left side) of the first connection plate 311, as viewed from the front end of the first purlin 31 (see fig. 9, front direction perpendicular to the paper surface). The second fixing plate 313 extends obliquely from the other end (e.g., upper end) of the first connection plate 311 toward the one side (e.g., left side) of the first connection plate 311. The included angle between the second fixing plate 313 and the first connecting plate 311 is an obtuse angle. In the illustrated embodiment, the first purlin 31 further includes two second mounting holes 316 (see fig. 11). The second mounting hole 316 vertically penetrates the second fixing plate 313. Referring to fig. 9, when the first purlin 31 is fixed to the photovoltaic module 200, bolts are sequentially inserted through the second mounting holes 316 and holes formed in the frame of the photovoltaic module 200 and then tightened with nuts.

The first fixing plate 312 is used for fixedly connecting with the spindle 1 in the photovoltaic bracket 100. In the illustrated embodiment, the first purlin 31 further includes two first mounting holes 315 (see fig. 11). The first mounting hole 315 penetrates the first fixing plate 312 in the up-down direction.

Further, the first purlin 31 further includes a bending portion 314. In the illustrated embodiment, the bending portion 314 is located in a middle region of the first connecting plate 311 as viewed in the A3-A3 direction. The bending portion 314 bends leftwards from the first connecting plate 311. That is, the first fixing plate 312, the second fixing plate 313, and the bending portion 314 are located on one side (left side in the illustrated embodiment) of the first connecting plate 311. The bent portion 314 makes the integral structure of the first purline 31 more stable, and is not easy to bend when being pressed by the photovoltaic module 200.

Furthermore, in the illustrated embodiment, the first purlin 31 also includes a hem 317. The folded edge 317 is connected to the left side edge of the first fixing plate 312. The folded edge 317 is perpendicular to the first fixing plate 312. The folded edge 317 and the first connecting plate 311 are respectively located at left and right sides of the first fixing plate 312.

The purline structure disclosed by the utility model, especially the first purline 31, is stable in structure, convenient to manufacture, easy to install, good in wind resistance, strong in bending resistance, capable of conveniently knowing whether bolts are loosened or not through visual observation, and simple to maintain.

The utility model also discloses a photovoltaic bracket 100. The photovoltaic module 200 is supported by the photovoltaic bracket 100.

See mainly fig. 1 to 4. The photovoltaic bracket 100 includes a main shaft 1 extending along A2-A2 direction, a plurality of columns 2 supporting the main shaft 1, a first connecting member 3 fixedly supporting one side (e.g., left side) of the photovoltaic module 200 to the main shaft 1, a second connecting member 4 fixedly supporting the other side (e.g., right side) of the photovoltaic module 200 to the main shaft 1, a driving motor 5, a first speed reducer 6, a second speed reducer 7, and a synchronizing shaft 8.

Referring to fig. 8, the support height H1 of the first connector 3 is different from the support height H2 of the second connector 4. In the illustrated embodiment, the supporting height H1 of the first connecting member 3 is greater than the supporting height H2 of the second connecting member 4, so that the photovoltaic module 200 is inclined in the north-south direction. It should be appreciated that the photovoltaic module 200 needs to be tilted at an angle towards the south in the northern hemisphere high latitude region, while the photovoltaic module 200 needs to be tilted at an angle towards the north in order to obtain a better sunlight angle of incidence.

Referring to fig. 3, the driving motor 5 is fixedly supported to the column 2.

The first decelerator 6 includes a first input terminal (not shown), a first output terminal (not shown), and a second output terminal 61. The output shaft of the driving motor 5 is fixedly connected with the first input end. Rotation of the drive motor 5 will drive the first input to rotate.

Rotation of the first input will be transferred to the first output as well as to the second output 61.

It should be understood that in other embodiments of the present utility model, such as in a multi-row linkage type photovoltaic module (i.e. comprising a plurality of spindles 1 and associated with rotational movement of the plurality of spindles 1), the first decelerator 6 may also comprise other output ends.

It should be appreciated that the interior of the first reduction gear 6 includes: and gears, worm gears, worms and other parts are used for reducing speed and increasing moment. This part is not the point of the utility model, and in the related art, there are embodiments that can be implemented, and therefore, the specific structure of the first speed reducer 6 will not be described in detail.

The first output end is in transmission connection with the main shaft 1. The rotation of the first output end will drive the spindle 1 to rotate about its own centre of rotation. The photovoltaic modules 200 are fixedly supported on the main shaft 1. When the spindle 1 rotates, the photovoltaic modules 200 rotate, so that a good included angle can be kept between the photovoltaic modules and incident sunlight.

The second output end 61 is fixedly connected with one end of the synchronizing shaft 8 for transmitting power. Rotation of the second output 61 will cause the synchronizing shaft 8 to rotate about its own centre of rotation.

Referring to fig. 4, the second decelerator 7 has a second input terminal 71 and a third output terminal (not shown). The other end of the synchronizing shaft 8 is fixedly connected with the second input end 71 to transmit power. Rotation of the second input 71 will cause rotation of the third output. The third output end is in transmission connection with the main shaft 1, that is, the rotation of the third output end will also drive the main shaft 1 to rotate around its own rotation center, so as to realize multi-point driving (two-point driving in the illustrated embodiment) of the main shaft 1.

Also, the specific structure of the second speed reducer 7 is not the utility model of the present utility model, and there are embodiments in the related art, and therefore, the specific structure of the second speed reducer 7 will not be described.

See mainly fig. 8-14. The first connecting piece 3 comprises a first purline 31, a first auxiliary connecting piece 33 and a first U-shaped bolt 32.

The first purlin 31 is the purlin disclosed in the foregoing description of the utility model.

Referring to fig. 11, the first auxiliary connection 33 is located between the first purlin 31 and the first U-bolt 32. The first auxiliary connector 33 includes a first base 331, a first side plate 332, a first recess 333, and a first tab 334. The first side plate 332 extends from both sides (e.g., left and right sides) of the first substrate 331 perpendicularly to the first substrate 331. The first grooves 333 penetrate through the two first side plates 332, and the first grooves 333 are opened toward the spindle 1. The shape of the first recess 333 is adapted to the outer peripheral shape of the spindle 1. When the first auxiliary connection member 33 is installed, at least part of the groove wall of the first groove 333 abuts against the spindle 1. The first flap 334 extends outwardly from the top wall of the first recess 333 (the upper wall of the first recess 333 in fig. 11) in a direction perpendicular to the first side plate 332. When the first auxiliary connection 33 is installed, the lower surface of the first tab 334 abuts against the upper surface of the main shaft 1.

The first auxiliary connection element 33 further comprises two third mounting holes 335. The third mounting hole 335 penetrates the first substrate 331 along A3-A3 direction.

The first U-bolt 32 has a first clasping portion 321 having a "U" shape and a first threaded portion 322 extending upward from both end portions of the first clasping portion 321. The inner wall shape of the first clasping portion 321 matches the outer peripheral shape of the spindle 1. After the first U-bolt 32 is mounted on the spindle 1, the inner wall of the first holding portion 321 abuts against the outer periphery of the spindle 1.

The first threaded portion 322 has a cylindrical shape with an external thread. After bypassing the spindle 1, the first U-bolt 32 passes through the third mounting hole 335 and the first mounting hole 315 in sequence, and then is screwed with a nut, so as to fasten the first fixing plate 312 with the spindle 1.

Referring mainly to fig. 10, the second connecting member 4 includes a second purlin 41, a second auxiliary connecting member 43, and a second U-bolt 42.

The second purlins 41 extend in a first direction A1-A1. The second purlin 41 has a zigzag shape when viewed from one end of the second purlin 41. It will be appreciated in connection with the following description that the "Z-shaped second purlin 41" herein means that the second purlin 41 has a generally "Z" shape overall when viewed at one end of the second purlin 41.

The second purline 41 includes a second connection plate 411, a third fixing plate 412 fixedly connected to the main shaft 1, a fourth fixing plate 413 fixedly connected to the photovoltaic module 200, and a step portion 414 configured to assist in positioning the photovoltaic module 200.

The third fixing plate 412 is connected to one end (e.g., a lower end) of the second connecting plate 411. An included angle between the third fixing plate 412 and the second connecting plate 411 is 45 ° to 90 °. The fourth fixing plate 413 is connected to the other end (upper end) of the second connection plate 411 through the step portion 414.

Referring to fig. 13, the second purlin 41 includes a fourth mounting hole 415 and a fifth mounting hole 416. The fourth mounting hole 415 penetrates the third fixing plate 412 in a direction perpendicular to the third fixing plate 412 (i.e., in the embodiment of the drawing, in the up-down direction). The fifth mounting hole 416 penetrates the fourth fixing plate 413 in a direction perpendicular to the fourth fixing plate 413. When the photovoltaic module 200 is mounted on the second purline 41, the bolts sequentially pass through the fifth mounting holes 416 and the mounting holes located on the frame of the photovoltaic module 200 and are locked with nuts. The lower surface of the photovoltaic module 200 is pressed against the upper surface of the fourth fixing plate 413.

The step 414 has at least one surface 4141. The surface 4141 is disposed vertically or obliquely with respect to the third fixing plate 412, and can prevent the photovoltaic module 200 from moving in the extending direction of the main shaft 1. That is, the step 414 is configured to provide a limit for the photovoltaic module 200 in a direction (A2-A2 direction in the drawing) extending along the main axis 1.

When the photovoltaic module 200 is mounted, one end of the photovoltaic module 200 is placed on the upper surface of the fourth fixing plate 413, and the step 414 blocks the photovoltaic module 200. The fourth fixing plate 413 and the step portion 414 together provide support and limit for the photovoltaic module 200, so that the installation is more convenient.

The second auxiliary connection 43 has the same structure as the first auxiliary connection 33.

Referring mainly to fig. 13, the second auxiliary connector 43 includes a second base plate 431, a second side plate 432, a second groove 433, and a second tab 434. The second side plates 432 extend from both sides (e.g., left and right sides) of the second base plate 431 perpendicularly to the second base plate 431. The second grooves 433 penetrate through the two second side plates 432, and the second grooves 433 are opened toward the spindle 1. The shape of the second groove 433 is adapted to the outer peripheral shape of the spindle 1. After the second auxiliary connection 43 is installed, at least part of the groove wall of the second groove 433 abuts against the spindle 1. The second tab 434 extends from a top wall of the second groove 433 (an upper wall of the second groove 433 in the drawing) in a direction perpendicular to the second side plate 432. When the second auxiliary connector 43 is mounted, the lower surface of the second wing 434 abuts against the upper surface of the main shaft 1.

The second auxiliary connector 43 further includes two sixth mounting holes 435. The sixth mounting hole 435 penetrates the two substrates 431 along the A3-A3 direction.

The second U-bolt 42 is identical in construction to the first U-bolt 32.

The second U-bolt 42 has a second hugging portion 421 having a "U" shape and a second screw portion 422 extending upward from both end portions of the second hugging portion 421. The shape of the inner wall of the second clasping portion 421 matches the shape of the outer circumference of the main shaft 1. After the second U-bolt 42 is mounted on the spindle 1, the inner wall of the second clasping portion 421 abuts against the outer circumference of the spindle 1.

The second threaded portion 422 is in the shape of a column with external threads. After bypassing the spindle 1, the second U-bolt 42 passes through the sixth mounting hole 435 and the fourth mounting hole 415 in sequence, and then is screwed with a nut, so as to lock the third fixing plate 412 with the spindle 1.

In the previous embodiment, the first connector 3 and the second connector 4 are applied in a tracking photovoltaic rack. It should be understood that in other embodiments of the utility model, the first connector 3 and the second connector 4 may also be used in a fixed or fixed adjustable photovoltaic bracket.

The above embodiments are only for illustrating the present utility model and not for limiting the technical solutions described in the present utility model, and it should be understood that the present utility model should be based on those skilled in the art, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the present utility model without departing from the spirit and scope of the present utility model and modifications thereof should be covered by the scope of the claims of the present utility model.

Claims (10)

1. A purlin for fixing a photovoltaic module (200) to a main shaft (1), characterized in that:

the purline comprises a first connecting plate (311), a first fixing plate (312) fixedly connected with the main shaft (1) and a second fixing plate (313) fixedly connected with the photovoltaic module (200);

the first fixing plate (312) extends vertically from one end of the first connecting plate (311) to one side of the first connecting plate (311), and the second fixing plate (313) extends obliquely from the other end of the first connecting plate (311) to the one side of the first connecting plate (311).

2. A purlin according to claim 1, wherein: the angle between the second fixing plate (313) and the first connecting plate (311) is an obtuse angle.

3. A purlin according to claim 1 or 2, wherein: the purlin further includes a fold (314); the bending part (314) is bent from the first connecting plate (311) to the one side of the first connecting plate (311).

4. A purlin according to claim 3, wherein: the purlin further includes a hem (317); the folded edge (317) extends vertically from one side edge of the first fixing plate (312), and the folded edge (317) and the first connecting plate (311) are respectively located at two opposite ends of the first fixing plate (312).

5. A photovoltaic bracket (100) for supporting a photovoltaic module (200), comprising a main shaft (1) and a plurality of uprights (2) for supporting the main shaft (1), characterized in that:

the photovoltaic module (200) is obliquely arranged on the first connecting piece (3) and the second connecting piece (4) of the main shaft (1) relative to the extending direction of the main shaft (1); the first connecting piece (3) and the second connecting piece (4) are positioned on two opposite sides of the photovoltaic module (200);

the first connector (3) comprises a first purline (31), the first purline (31) being a purline according to any one of claims 1 to 4.

6. The photovoltaic bracket (100) according to claim 5, characterized in that: -said second connection (4) comprises a second purline (41);

the second purline (41) comprises a second connecting plate (411), a third fixing plate (412) fixedly connected with the main shaft (1), a fourth fixing plate (413) fixedly connected with the photovoltaic module (200) and a step part (414) configured to limit the photovoltaic module (200);

viewed at one end of the second purline (41), the second purline (41) is in a Z shape: the third fixing plate (412) is connected to one end of the second connecting plate (411), and the fourth fixing plate (413) is connected to the other end of the second connecting plate (411) through the step portion (414).

7. The photovoltaic bracket (100) according to claim 6, characterized in that: the first connecting piece (3) further comprises a first U-shaped bolt (32), and the first U-shaped bolt (32) surrounds the main shaft (1) and is fixedly connected with the first fixing plate (312);

and/or, the second connecting piece (4) further comprises a second U-shaped bolt (42), and the second U-shaped bolt (42) surrounds the main shaft (1) and is fixedly connected with the third fixing plate (412).

8. The photovoltaic bracket (100) according to claim 7, characterized in that: the first connecting piece (3) further comprises a first auxiliary connecting piece (33); the first auxiliary connecting piece (33) comprises a first base plate (331), first side plates (332) and first grooves (333), the first side plates (332) extend from two sides of the first base plate (331) perpendicular to the first base plate (331), the first grooves (333) penetrate through the two first side plates (332), the first grooves (333) are opened towards the main shaft (1), at least part groove walls of the first grooves (333) are abutted against the main shaft (1), and first U-shaped bolts are wound around the main shaft (1) and penetrate through the first base plate (331) and the first fixing plates (312);

and/or the number of the groups of groups,

the second connecting piece (4) further comprises a second auxiliary connecting piece (43); the second auxiliary connecting piece (43) comprises a second base plate (431), second side plates (432) and second grooves (433), the second side plates (432) are perpendicular to the second base plate (431) from two sides of the second base plate (431), the second grooves (433) penetrate through two second side plates (432), the second grooves (433) are opened towards the main shaft (1), at least part groove walls of the second grooves (433) are abutted against the main shaft (1), and second U-shaped bolts wind the main shaft (1) and penetrate through the second base plate (431) and the third fixing plate (412).

9. The photovoltaic bracket (100) according to claim 8, characterized in that: the first auxiliary connector (33) further comprises a first fin (334), the first fin (334) extends outwards from the top wall of the first groove (333) along the direction perpendicular to the first side plate (332), and the first fin (334) abuts against the main shaft (1);

and/or the number of the groups of groups,

the second auxiliary connector (43) further comprises a second tab (434), the second tab (434) extending outwardly from the top wall of the second recess (433) in a direction perpendicular to the second side panel (432), the second tab (434) abutting against the spindle (1).

10. The photovoltaic bracket (100) according to claim 5, characterized in that: the device also comprises a driving motor (5), a first speed reducer (6), a second speed reducer (7) and a synchronous shaft (8);

the first speed reducer (6) has a first input, a first output and a second output (61); the first input end is in transmission connection with the output end of the driving motor (5), the first output end is in transmission connection with the main shaft (1), and the second output end (61) is fixedly connected with one end of the synchronous shaft (8);

the second reducer (7) has a second input (71) and a third output; the other end of the synchronizing shaft (8) is fixedly connected with the second input end (71), and the third output end is in transmission connection with the main shaft (1).