Photovoltaic tracking bracket system

Abstract

A photovoltaic tracking bracket system, comprising a main shaft (1), a synchronous shaft (2), a driving source (3), and transmission mechanisms (4). The main shaft (1) has a cavity (10). The main shaft (1) and the synchronous shaft (2) extend in a first direction and are spaced apart in a second direction. There are N transmission mechanisms (4) arranged at intervals in the first direction, wherein N is a positive integer greater than 1. The driving source (3) is connected to the first transmission mechanism (4) in the first direction. Every two adjacent transmission mechanisms (4) are connected by means of the synchronous shaft (2). Each transmission mechanism (4) comprises two shaft end parts (411) which are arranged oppositely. The main shaft (1) has a first planar wall (11). The shaft end parts (411) each have a second planar wall (4111). The shaft end parts (411) are fitted to and inserted into the cavity (10) of the main shaft (1). The first planar wall (11) is connected to the second planar walls (4111) by means of fasteners (5). The first planar wall (11) is attached to the second planar walls (4111). In this way, the damage caused by impact force to connection holes of the shaft end parts (411) and the main shaft (1) can be reduced.

Description

Photovoltaic tracking bracket system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed on July 25, 2023, with application number 202321960281.6 and invention name “Photovoltaic Tracking Bracket System”. The relevant content of the Chinese patent application is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of photovoltaic brackets, and in particular to a photovoltaic tracking bracket system. Background Art

[0004] Currently, the parallel drive of a photovoltaic tracker is connected to the main shaft, driving the main shaft's rotation and, in turn, the photovoltaic modules mounted on it. Under normal tracking conditions, the parallel drive must be started and stopped multiple times daily. Each start and stop impacts the main shaft, placing significant torque at the connection between the parallel drive's drive end and the main shaft, significantly impacting the connectors and the connection holes on the main shaft. To minimize the impact of these forces on the connectors and main shaft during starts and stops, improvements to the photovoltaic tracker system are necessary.

[0005] Summary of the Invention

[0006] The purpose of this application is to provide a photovoltaic tracking bracket system that reduces the damage to the main shaft caused by the impact force when the parallel drive is started and stopped.

[0007] To achieve the above objectives, this application adopts the following technical solution 1:

[0008] A photovoltaic tracking bracket system includes a main shaft, a synchronous shaft, a driving source and a transmission mechanism, wherein the main shaft has a cavity, the main shaft and the synchronous shaft extend in a first direction and are spaced apart in a second direction, the first direction is perpendicular to the second direction, the transmission mechanism includes N transmission mechanisms spaced apart in the first direction, and N is a positive integer greater than 1; the driving source is connected to the first transmission mechanism in the first direction, and every two adjacent transmission mechanisms are connected through the synchronous shaft; the transmission mechanism includes two shaft head components arranged oppositely, the main shaft includes a first plane wall, the shaft head component includes a second plane wall, the shaft head component is inserted into the cavity of the main shaft, the first plane wall and the second plane wall are connected by fasteners, and the first plane wall and the second plane wall are in contact with each other.

[0009] As a further improved technical solution 1 of the present application, the first plane walls include at least two, and the two first plane walls are symmetrical relative to the axis of the main shaft; the second plane walls include at least two, and the two second plane walls are symmetrical relative to the axis of the shaft head component, each first plane wall is in contact with the corresponding second plane wall, and each first plane wall and the corresponding second plane wall are fastened together by at least one fastener.

[0010] As a further improved technical solution 1 of the present application, the axial direction of the shaft head component is consistent with the axial direction of the main shaft, the shaft head component has a first cross-sectional shape perpendicular to its own axial direction, and the main shaft has a second cross-sectional shape perpendicular to its own axial direction, and the first cross-sectional shape matches the second cross-sectional shape.

[0011] As a further improved technical solution 1 of the present application, the second cross-sectional shape of the main shaft includes a first straight line segment, a second straight line segment, a third straight line segment, a fourth straight line segment and a fifth straight line segment connected end to end in the circumferential direction to form a closed structure; the main shaft has an axially symmetrical structure with the perpendicular bisector of the third straight line segment, the second straight line segment is symmetrically arranged with the fourth straight line segment, the first straight line segment is symmetrically arranged with the fifth straight line segment, and the second straight line segment and the fourth straight line segment are respectively connected perpendicularly to the third straight line segment.

[0012] As a further improved technical solution 1 of the present application, the second cross-sectional shape of the main shaft includes a first straight line segment, a second straight line segment, a third straight line segment, a first arc segment, a second arc segment and a third arc segment connected end to end in the circumferential direction to form a closed structure; the first arc segment is connected between the second straight line segment and the third straight line segment, the second arc segment is connected between the first straight line segment and the second straight line segment, and the third arc segment is connected between the first straight line segment and the third straight line segment, and the first arc segment, the second arc segment and the third arc segment are three arcs distributed on the same circle.

[0013] As a further improved technical solution 1 of the present application, a first hole is provided on the first plane wall, and a second hole is provided on the second plane wall. The fastener passes through the first hole and the second hole to fixedly connect the shaft head component and the main shaft.

[0014] As a further improved technical solution 1 of the present application, the first direction is the left-right direction, and the second direction is the up-down direction; each of the transmission mechanisms includes a shell and a transmission assembly, and a receiving chamber is formed inside the shell. The transmission assembly includes a first transmission member, a second transmission member, a third transmission member and a fourth transmission member located in the receiving chamber and meshing with each other in sequence in the second direction. The first transmission member is located at the bottom of the transmission assembly and the fourth transmission member is located at the top of the transmission assembly. The shaft head member is installed on the end face of the fourth transmission member, and the shaft head member protrudes from the shell for connection with the main shaft.

[0015] As a further improved technical solution 1 of the present application, the driving source has an output shaft; the first transmission member includes a first transmission shaft, the two ends of the first transmission shaft are coaxially connected to the output shaft and the synchronization shaft respectively, and the first transmission shaft, the output shaft and the synchronization shaft are all parallel to the shaft head component.

[0016] As a further improved technical solution 1 of the present application, the end of the first transmission shaft close to the output shaft is the power input end, the power input end is exposed outside the shell and is directly or indirectly connected to the drive source; the end of the first transmission shaft away from the output shaft is the power output end, the power output end is exposed outside the shell and is connected to the synchronization shaft.

[0017] As a further improved technical solution 1 of the present application, the first transmission shaft and the synchronous shaft are connected via a sleeve, the sleeve is fixedly sleeved on the periphery of the power input end and / or the power output end, and the synchronous shaft is fixedly sleeved on the periphery of the sleeve.

[0018] As a further improved technical solution 1 of the present application, the second transmission member is engaged above the first transmission member, the first transmission member includes a first helical gear portion, the second transmission member includes a second helical gear portion, the first helical gear portion is engaged with the second helical gear portion to achieve the first reversal of the power transmission in the second direction; the fourth transmission member is engaged above the third transmission member, the third transmission member includes a threaded portion, the fourth transmission member includes a toothed portion, the threaded portion is engaged with the toothed portion to achieve the second reversal of the power transmission in the second direction.

[0019] As a further improved technical solution 1 of the present application, the third transmission member is engaged above the second transmission member, the second transmission member includes a first external gear part, the third transmission member includes a second external gear part, the first external gear part is engaged with the second external gear part, and the number of teeth of the first external gear part is less than the number of teeth of the second external gear part.

[0020] To achieve the above objectives, this application adopts the following technical solution 2:

[0021] A photovoltaic tracking bracket system includes a main shaft and a transmission mechanism, the main shaft has a cavity, the transmission mechanism includes a shaft head component, the main shaft includes a first plane wall, the shaft head component includes a second plane wall, the shaft head component is inserted into the cavity of the main shaft, the first plane wall and the second plane wall are connected by fasteners, and the first plane wall and the second plane wall are in contact with each other.

[0022] As a further improved technical solution 2 of the present application, the photovoltaic tracking bracket system also includes a synchronization shaft, the main shaft and the synchronization shaft extend in the first direction and are spaced apart in the second direction, the first direction is perpendicular to the second direction, and the transmission mechanism includes N elements spaced apart in the first direction, where N is a positive integer greater than 1; the shaft head components of each adjacent two transmission mechanisms are connected by the synchronization shaft.

[0023] As a further improved technical solution 2 of the present application, the photovoltaic tracking bracket system further includes a driving source, and the driving source is connected to the first transmission mechanism in the first direction.

[0024] As a further improved technical solution 2 of the present application, at least part of the shaft head components on the transmission mechanism are two oppositely arranged ones.

[0025] As a further improved technical solution 2 of the present application, the first plane walls include at least two, and the two first plane walls are symmetrical relative to the axis of the main shaft; the second plane walls include at least two, and the two second plane walls are symmetrical relative to the axis of the shaft head component, each first plane wall is in contact with the corresponding second plane wall, and each first plane wall and the corresponding second plane wall are fastened together by at least one fastener.

[0026] As a further improved technical solution 2 of the present application, the axial direction of the shaft head component is consistent with the axial direction of the main shaft, the shaft head component has a first cross-sectional shape perpendicular to its own axial direction, and the main shaft has a second cross-sectional shape perpendicular to its own axial direction, and the first cross-sectional shape matches the second cross-sectional shape.

[0027] As a further improved technical solution 2 of the present application, the second cross-sectional shape of the main shaft includes a first straight line segment, a second straight line segment, a third straight line segment, a fourth straight line segment and a fifth straight line segment connected end to end in the circumferential direction to form a closed structure; the main shaft has an axially symmetrical structure with the perpendicular bisector of the third straight line segment, the second straight line segment is symmetrically arranged with the fourth straight line segment, the first straight line segment is symmetrically arranged with the fifth straight line segment, and the second straight line segment and the fourth straight line segment are respectively connected perpendicularly to the third straight line segment.

[0028] As a further improved technical solution 2 of the present application, the second cross-sectional shape of the main shaft includes a first straight line segment, a second straight line segment, a third straight line segment, a first arc segment, a second arc segment and a third arc segment connected end to end in the circumferential direction to form a closed structure; the first arc segment is connected between the second straight line segment and the third straight line segment, the second arc segment is connected between the first straight line segment and the second straight line segment, and the third arc segment is connected between the first straight line segment and the third straight line segment, and the first arc segment, the second arc segment and the third arc segment are three arcs distributed on the same circle.

[0029] Compared with the prior art, the transmission mechanism of the photovoltaic tracking bracket system of the present application includes an axis head component, and the axis head component includes a second plane wall that cooperates with the first plane wall of the main shaft, that is, the main shaft and the axis head component each include a plane wall. When the axis head component is inserted into the cavity of the main shaft, the first plane wall and the second plane wall fit together so that the impact force generated by the start and stop of the motor acts on the plane of the main shaft. The impact force generated when the parallel drive of the present application starts and stops causes less damage to the connecting hole of the axis head component and the main shaft due to the planar matching relationship between the axis head component and the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a three-dimensional assembly diagram of the photovoltaic tracking bracket system of the present application;

[0031] Figure 2 is an enlarged view of portion A in Figure 1;

[0032] FIG3 is a three-dimensional assembly diagram of the photovoltaic tracking bracket system of the present application in FIG1 with some photovoltaic modules removed;

[0033] FIG4 is an enlarged view of portion B in FIG3 ;

[0034] FIG5 is a three-dimensional combined diagram of a driving source and a transmission mechanism driven by the driving source in the photovoltaic tracking bracket system of the present application;

[0035] FIG6 is a perspective exploded view of the photovoltaic tracking bracket system of the present application, in which the drive source and the transmission assembly it drives, as well as the transmission assembly and the synchronization shaft, are connected via bushings;

[0036] FIG7 is a perspective exploded view of the photovoltaic tracking bracket system of the present application, in which the transmission assembly and two adjacent synchronization shafts are connected via shaft sleeves;

[0037] FIG8 is a perspective exploded view of the transmission mechanism in the photovoltaic tracking bracket system of the present application, with its transmission assembly separated from its housing;

[0038] FIG9 is a three-dimensional diagram of the main shaft and the transmission mechanism in the photovoltaic tracking bracket system of the present application;

[0039] FIG10 is an enlarged view of portion C in FIG9 ;

[0040] FIG11 is a perspective exploded view of the main shaft and transmission mechanism in the photovoltaic tracking bracket system of the present application;

[0041] FIG12 is an enlarged view of portion D in FIG11 ;

[0042] FIG13 is a front view of the housing of the transmission mechanism in the photovoltaic tracking bracket system of the present application;

[0043] FIG14 is a sectional view taken along line EE in FIG13, ie, a sectional view of the shaft head component;

[0044] FIG15 is a front view of the main shaft in the photovoltaic tracking bracket system of the present application;

[0045] FIG16 is a sectional view taken along line FF in FIG15 , that is, a sectional view of the main shaft;

[0046] FIG17 is a cross-sectional view of another embodiment of the shaft head component similar to FIG14;

[0047] FIG. 18 is a cross-sectional view similar to FIG. 16 of another embodiment of a main shaft. DETAILED DESCRIPTION

[0048] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. If there are several specific embodiments, the features of these embodiments may be mutually applicable unless they conflict. When the description refers to the drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments consistent with the present application; rather, they are merely examples of devices, products and / or methods that are consistent with some aspects of the present application and are described in the claims of the present application.

[0049] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of this application. The singular forms "a", "an", "the" or "the" used in the specification and claims of this application are also intended to include plural forms, unless the context clearly indicates otherwise.

[0050] It should be understood that the words used in the specification and claims of the present application, such as "first", "second" and similar words, do not indicate any order, quantity or importance, but are only used to distinguish the names of features. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise indicated, words such as "front", "back", "upper", "lower", "left", "right" and similar words appearing in this application are only for the convenience of description and are not limited to a specific position or a spatial orientation. Words such as "include" or "comprises" are open-ended expressions, meaning that the elements appearing before "include" or "comprises" include the elements appearing after "include" or "comprises" and their equivalents, and this does not exclude that the elements appearing before "include" or "comprises" may also include other elements. If "several" appears in this application, it means two or more, and if "multiple" appears, it means three or more.

[0051] Please refer to Figures 1 to 16, a photovoltaic tracking bracket system includes a main shaft 1, a synchronous shaft 2, a driving source 3 and a transmission mechanism 4 (the industry generally refers to the transmission mechanism 4 as a parallel drive). The interior of the main shaft 1 is hollow and has a cavity 10. The main shaft 1 and the synchronous shaft 2 extend in the first direction and are spaced apart in the second direction, and the first direction is perpendicular to the second direction. The transmission mechanism 4 includes N units arranged side by side in the first direction, where N is a positive integer greater than 1. The driving source 3 is connected to the first transmission mechanism 4 in the first direction, and each adjacent two transmission mechanisms 4 are connected through the synchronous shaft 2. N-level transmission (for example: when N is 5, the photovoltaic tracking bracket system of this application is a 5-level transmission in the first direction) is a multi-point drive, which disperses wind pressure and wind torque, and greatly improves the stability of the photovoltaic tracking bracket system. In this application, the first direction refers to the left and right direction shown in Figure 1, and the second direction refers to the up and down direction shown in Figure 1.

[0052] Specifically, please refer to Figure 8. Each parallel drive, namely the transmission mechanism 4, includes a shell 41 and a transmission assembly 42. The interior of the shell 41 forms a receiving chamber 40, and the transmission assembly 42 includes a plurality of components (described in detail later) located in the receiving chamber 40 and meshing with each other. In a specific embodiment, the shell 41 includes a main body 410 and two shaft head components 411, and the shaft head components 411 are oppositely arranged on both sides of the main body 410. The transmission assembly 42 is arranged in the shell 41. On the one hand, it is convenient to position the transmission mechanism 4 on the column 400, and on the other hand, it is convenient to connect the transmission assembly 42 with other elements driven by it (the main shaft 1 and the synchronous shaft 2). Through the meshing between the multiple components of the transmission assembly 42, the impact force generated by the frequent start and stop of the transmission mechanism 4 is absorbed, thereby reducing the impact force on the main shaft 1.

[0053] Further, referring to Figures 9 to 16, the spindle 1 includes a first planar wall 11, and the shaft head component 411 includes a second planar wall 4111. The shaft head component 411 is inserted into the cavity 10 of the spindle 1. The first planar wall 11 and the second planar wall 4111 are connected by fasteners 5, and the first planar wall 11 and the second planar wall 4111 are in close contact with each other. Specifically, the first planar wall 11 includes at least two first planar walls 11, and the two first planar walls 11 are symmetrical with respect to the axis of the spindle 1; the second planar wall 4111 includes at least two second planar walls 4111, and the two second planar walls 4111 are symmetrical with respect to the axis of the shaft head component 411. Each first planar wall 11 is in close contact with the corresponding second planar wall 4111, and each first planar wall 11 and the corresponding second planar wall 4111 are each fastened together by at least one fastener 5. Since the shaft head component 411 and the main shaft 1 include at least one set of matching planar walls, the impact force generated by the start and stop of the motor acts on the plane of the main shaft 1. In other words, the shaft head component 411 serves as a connector fixedly connected to the main shaft 1 in this application. Both the shaft head component 411 and the main shaft 1 have holes for the fastener 5 to pass through. The impact force generated when the parallel drive of this application starts and stops is reduced due to the planar matching relationship between the shaft head component 411 and the main shaft 1. This reduces the damage caused to the connecting holes of the shaft head component 411 and the main shaft 1. In particular, the two symmetrically arranged first planar walls 11 and the corresponding second planar walls 4111 are fitted together and then locked by the fastener 5, which can reduce eccentric torque and is more conducive to reducing the vibration of the main shaft 1.

[0054] Please refer to Figures 1 to 4, 8 and 12. The axial direction of the shaft head component 411 is consistent with the axial direction of the main shaft 1. The shaft head component 411 has a first cross-sectional shape perpendicular to its own axial direction, and the main shaft 1 has a second cross-sectional shape perpendicular to its own axial direction. The first cross-sectional shape matches the second cross-sectional shape. The purpose is that: after the shaft head component 411 is inserted into the interior of the main shaft 1 and the main shaft 1 is connected with each transmission mechanism 4 (parallel drive), the connection position of the main shaft 1 and each transmission mechanism 4 has a completely matching planar contact effect. When the parallel drive transmits power upward, due to the planar matching relationship between the shaft head component 411 and the main shaft 1, the damage of the impact force to the shaft head component 411 and the main shaft 1 can be minimized.

[0055] In the first optional embodiment, the first cross-sectional shape of the shaft head component 411 and the second cross-sectional shape of the main shaft 1 are both polygonal, and each side of the polygon is a straight line segment. Referring to FIG16 , the second cross-sectional shape of the main shaft 1 includes a first straight line segment 101, a second straight line segment 102, a third straight line segment 103, a fourth straight line segment 104, and a fifth straight line segment 105 connected end to end in the circumferential direction to form a closed structure; the main shaft 1 is axially symmetrical about the perpendicular midline of the third straight line segment 103, with the second straight line segment 102 and the fourth straight line segment 104 symmetrically arranged, the first straight line segment 101 and the fifth straight line segment 105 symmetrically arranged, and the second straight line segment 102 and the fourth straight line segment 104 are respectively perpendicularly connected to the third straight line segment 103; referring to FIG14 , corresponding to FIG16 , the first cross-sectional shape of the shaft head component 411 is also a convex pentagon. In other alternative embodiments of the first embodiment, the first cross-sectional shape of the shaft head component 411 and / or the second cross-sectional shape of the main shaft 1 may also be "similar to" a pentagon. "Similar to" a pentagon specifically means that an arc chamfer is provided between two adjacent sides of the polygon, resulting in a bend in the smaller areas at both ends of each side. This is also covered by the protection scope of each side being a straight line segment in this application. A fastener 5 is provided on the plane wall corresponding to each side, and the fastener 5 is used to connect and fix the shaft head component 411 and the main shaft 1.

[0056] In the second optional embodiment, the first cross-sectional shape of the shaft head component 411 and the second cross-sectional shape of the main shaft 1 are both polygonal arcs, wherein one portion of the sides of the polygonal arc is a straight line segment and another portion of the sides is an arc segment. Referring to FIG18 , the second cross-sectional shape of the main shaft 1 includes a first straight line segment 101, a second straight line segment 102, a third straight line segment 103, a first arc segment 104, a second arc segment 105, and a third arc segment 106 connected end to end in the circumferential direction to form a closed structure; the first arc segment 104 is connected between the second straight line segment 102 and the third straight line segment 103, the second arc segment 105 is connected between the first straight line segment 101 and the second straight line segment 102, and the third arc segment 106 is connected between the first straight line segment 101 and the third straight line segment 103. The first arc segment 104, the second arc segment 105, and the third arc segment 106 are three arcs distributed on the same circle. Referring to Figure 17 , corresponding to Figure 18 , the first cross-sectional shape of the shaft head component 411 is also a polygonal arc. Of course, the polygonal arc is not limited to the shapes described in Figures 17 and 18 , and other shapes are also possible. For example, the first cross-sectional shape of the shaft head component 411 and / or the second cross-sectional shape of the main shaft 1 may also be D-shaped. The D-shaped shape includes a straight line segment and an arc segment, and thus, the D-shaped shape is also a type of polygonal arc.

[0057] In summary, the two embodiments described above only require that all contact surfaces between the shaft head component 411 and the main shaft 1 have matching planar walls (corresponding to the straight line segments in the first and second cross-sectional shapes). Contact surfaces other than planar walls may also be curved walls (corresponding to the arc segments in the first and second cross-sectional shapes). Although curved walls can also match each other, planar walls further reduce the vibration of the main shaft 1. In other words, the completely planar fit between the shaft head component 411 and the main shaft 1 in the first embodiment can further reduce the impact force on the main shaft 1.

[0058] Referring to Figures 4, 14, and 16, the present application further includes a plurality of fasteners 5. A first hole 112 is defined in the first planar wall 11, and a second hole 4112 is defined in the second planar wall 4111. Fasteners 5 pass through the first and second holes 112, 4112, to securely connect the shaft head component 411 to the spindle 1. In a specific embodiment, a fastener 5 is provided through the corresponding planar wall of each side, and is used to securely connect the shaft head component 411 to the spindle 1. In a specific embodiment, the fasteners 5 are bolts.

[0059] Referring to Figures 5 to 8 , transmission assembly 42 includes a first transmission member 421, a second transmission member 422, a third transmission member 423, and a fourth transmission member 424. In other words, in this embodiment, the multiple components of transmission assembly 42 are four. The first transmission member 421, the second transmission member 422, the third transmission member 423, and the fourth transmission member 424 sequentially mesh and transmit in the second direction. The structure of transmission assembly 42 is well known to those skilled in the art and will be briefly described below.

[0060] First, the drive source 3 has an output shaft 30. The drive source 3 drives the first transmission member 421 to rotate around the axis and drive the synchronous shaft 2. The power is transmitted to the next transmission mechanism 4 through the synchronous shaft 2 in the first direction. The first transmission member 421 includes a first transmission shaft 4210. The two ends of the first transmission shaft 4210 are coaxially connected to the output shaft 30 and the synchronous shaft 2 respectively. The first transmission shaft 4210, the output shaft 30, and the synchronous shaft 2 are all parallel to the shaft head component 411. The end of the first transmission shaft 4210 close to the output shaft 30 is the power input end 4211. The power input end 4211 is exposed outside the housing 41 and is directly or indirectly connected to the drive source 3; the end of the first transmission shaft 4210 away from the output shaft 30 is the power output end 4212. The power output end 4212 is exposed outside the housing 41 and is connected to the synchronous shaft 2. For example, the transmission assembly 42 of the first stage has a first transmission member 421 , whose power input end 4211 is directly connected to the driving source 3 ; the transmission assemblies 42 of the remaining other stages have a first transmission member 421 , whose power input end 4211 is indirectly connected to the driving source 3 .

[0061] It should be noted that the first transmission shaft 4210 is connected to the synchronization shaft 2 via a sleeve 6. The sleeve 6 is fixedly mounted on the periphery of the power input end 4211 and / or the power output end 4212, and the synchronization shaft 2 is fixedly mounted on the periphery of the sleeve 6 to enable power to be transmitted in the first direction. Specifically, referring to Figures 4, 6, and 7, a portion of the fasteners 5 pass through holes in the sleeve 6, the power input end 4211, and the synchronization shaft 2 (all holes are unnumbered), and another portion of the fasteners 5 pass through holes in the sleeve 6, the power output end 4212, and the synchronization shaft 2 (all holes are unnumbered), connecting the two ends of the first transmission member 421 to the synchronization shaft 2 via the sleeves 6. The function of the bushing 6 is, on the one hand, to strengthen the strength of the connection between the synchronous shaft 2 and the transmission mechanism 4, and on the other hand, to reduce the diameters of both the power input end 4211 and the power output end 4212, thereby reducing the size of the housing 41 and reducing costs. It is also beneficial to the sealing between the power input end 4211 and the housing 41 and between the power output end 4212 and the housing 41.

[0062] Next, referring to Figure 8 , the extension direction of the first transmission member 421 is consistent with the extension direction of the fourth transmission member 424, the extension direction of the second transmission member 422 is consistent with the extension direction of the third transmission member 423, the axial direction of the second transmission member 422 is perpendicular to the axial direction of the first transmission member 421, the axial direction of the third transmission member 423 is parallel to the axial direction of the second transmission member 422, and the axial direction of the fourth transmission member 424 is perpendicular to the axial direction of the third transmission member 423. This arrangement ensures that the power transmitted to the synchronization shaft 2 through the transmission assembly 42 in the first direction is ultimately converted into power for the next-stage main shaft 1 in the second direction through the next-stage transmission assembly 42. Therefore, the transmission between the left and right stages is consistent, and the main shafts 1 rotate in unison. This can also be understood as all main shafts 1 can achieve a parallel and consistent rotation angle. In other words, the photovoltaic assembly 100 supported by the photovoltaic tracking bracket system of the present application, which is fixed to the ground 200, can rotate in accordance with the rotation of the sun. Because all main shafts 1 can achieve a parallel and consistent rotation angle, the rotation of the photovoltaic assembly 100 is synchronized and consistent.

[0063] Finally, in conjunction with Figures 5 to 8, the structural composition of the four components of the transmission assembly 42 is briefly introduced. The second transmission member 422 is engaged with the first transmission member 421 above the first transmission member 421, the first transmission member 421 includes a first helical gear portion 401, the second transmission member 422 includes a second helical gear portion 402, the first helical gear portion 401 and the second helical gear portion 402 are engaged to achieve the first reversal of the second direction power transmission; the third transmission member 423 is engaged with the second transmission member 422 above the second transmission member 422, the second transmission member 422 includes a first external gear portion 403, the third transmission member 423 includes a second external gear portion 404, the first external gear portion 403 is engaged with the second external gear portion 404, the first external gear portion 403 is engaged with the second external gear portion 404, and the first external gear portion 403 is engaged with the second external gear portion 404. The number of teeth of the gear part 403 is smaller than the number of teeth of the second external gear part 404. This setting is used to change the transmission ratio, increase the output torque of the transmission component 42, or when the same torque is output, a small-sized motor can be selected to reduce costs; the fourth transmission member 424 is engaged above the third transmission member 423, and the third transmission member 423 includes a threaded portion 405, that is, the third transmission member 423 is equivalent to a worm, and the fourth transmission member 424 includes a toothed portion 406, that is, the fourth transmission member 424 is equivalent to a worm wheel, and the threaded portion 405 is engaged with the toothed portion 406 to realize the second reversal of power transmission in the second direction. When the motor starts, it drives the first transmission member 421 to rotate. This rotation, on the one hand, drives the synchronous shaft 2 in the first direction. On the other hand, the rotation of the first transmission member 421, in the second direction, sequentially drives the second transmission member 422, the third transmission member 423, and the fourth transmission member 424 through the meshing of the gears. The shaft head component 411 is mounted on the end surface of the turbine, or fourth transmission member 424. The shaft head component 411 protrudes from the housing 41 and is connected to the main shaft 1. The power from the drive source 3 is ultimately transmitted to the main shaft 1 through the N-stage transmission mechanism 4. Thus, the impact force generated by the motor starting and stopping is gradually absorbed by the four transmission components 421, 422, 423, and 424 of each stage of the transmission mechanism 4, minimizing the impact force acting on the main shaft 1.

[0064] The photovoltaic tracking bracket system of the present application is provided with two shaft head components 411 on the transmission mechanism 4. The shaft head component 411 includes a second plane wall 4111 that cooperates with the first plane wall 11 of the main shaft 1, that is, the main shaft 1 and the shaft head component 411 each include a plane wall. With such a configuration, the shaft head component 411 cooperates to be inserted into the cavity 10 of the main shaft 1, and the first plane wall 11 fits with the second plane wall 4111, so that the impact force generated by the start and stop of the motor acts on the planar wall surface of the main shaft 1. In a preferred embodiment, the first cross-section of the shaft head component 411 is configured to be a polygon, such as a pentagon, and matches the second cross-sectional shape of the main shaft 1. The impact force generated when the parallel drive of the present application starts and stops is reduced due to the planar matching relationship between the shaft head component 411 and the main shaft 1, thereby reducing damage to the shaft head component 411 and the connecting hole of the main shaft 1.

[0065] The above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. The understanding of this specification should be based on technical personnel in the relevant technical field. For example, the description of directions such as "front", "back", "left", "right", "up", and "down" has been described in detail in this specification with reference to the above embodiments. However, ordinary technical personnel in this field should understand that technical personnel in the relevant technical field can still modify or replace the present application with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. A photovoltaic tracking bracket system, comprising a main shaft (1), a synchronous shaft (2), a driving source (3) and a transmission mechanism (4), wherein the main shaft (1) has a cavity (10), the main shaft (1) and the synchronous shaft (2) extend in a first direction and are spaced apart in a second direction, the first direction is perpendicular to the second direction, wherein: The transmission mechanism (4) comprises N transmission mechanisms (4) arranged at intervals in the first direction, wherein N is a positive integer greater than 1; the driving source (3) is connected to the first transmission mechanism (4) in the first direction, and every two adjacent transmission mechanisms (4) are connected via the synchronization shaft (2); The transmission mechanism (4) comprises two shaft head components (411) arranged opposite to each other, the main shaft (1) comprises a first plane wall (11), the shaft head component (411) comprises a second plane wall (4111), the shaft head component (411) is inserted into the cavity (10) of the main shaft (1), the first plane wall (11) and the second plane wall (4111) are connected by a fastener (5), and the first plane wall (11) and the second plane wall (4111) are in close contact with each other.

2. The photovoltaic tracking bracket system according to claim 1, wherein: The first plane walls (11) include at least two, and the two first plane walls (11) are symmetrical relative to the axis of the main shaft (1); the second plane walls (4111) include at least two, and the two second plane walls (4111) are symmetrical relative to the axis of the shaft head component (411), each of the first plane walls (11) is in contact with the corresponding second plane wall (4111), and each of the first plane walls (11) and the corresponding second plane wall (4111) are each fastened to each other by at least one of the fasteners (5).

3. The photovoltaic tracking bracket system according to claim 1, wherein: The axial direction of the shaft head component (411) is consistent with the axial direction of the main shaft (1), the shaft head component (411) has a first cross-sectional shape perpendicular to its own axial direction, and the main shaft (1) has a second cross-sectional shape perpendicular to its own axial direction, and the first cross-sectional shape matches the second cross-sectional shape.

4. The photovoltaic tracking bracket system according to claim 3, wherein: The second cross-sectional shape of the main axis (1) comprises a first straight line segment (101), a second straight line segment (102), a third straight line segment (103), a fourth straight line segment (104) and a fifth straight line segment (105) which are connected end to end in a circumferential direction to form a closed structure; the main axis (1) takes the perpendicular bisector of the third straight line segment (103) as an axially symmetrical structure, the second straight line segment (102) and the fourth straight line segment (104) are symmetrically arranged, the first straight line segment (101) and the fifth straight line segment (105) are symmetrically arranged, and the second straight line segment (102) and the fourth straight line segment (104) are respectively perpendicularly connected to the third straight line segment (103).

5. The photovoltaic tracking bracket system according to claim 3, wherein: The second cross-sectional shape of the main shaft (1) comprises a first straight line segment (101), a second straight line segment (102), a third straight line segment (103), a first arc segment (104), a second arc segment (105) and a third arc segment (106) connected end to end in a circumferential direction to form a closed structure; the first arc segment (104) is connected between the second straight line segment (102) and the third straight line segment (103), the second arc segment (105) is connected between the first straight line segment (101) and the second straight line segment (102), the third arc segment (106) is connected between the first straight line segment (101) and the third straight line segment (103), and the first arc segment (104), the second arc segment (105) and the third arc segment (106) are three arcs distributed on the same circle.

6. The photovoltaic tracking bracket system according to any one of claims 1 to 5, wherein: The first plane wall (11) is provided with a first hole (112), the second plane wall (4111) is provided with a second hole (4112), and the fastener (5) passes through the first hole (112) and the second hole (4112) to fix the shaft head component (411) and the main shaft (1) together.

7. The photovoltaic tracking bracket system according to any one of claims 1 to 5, wherein: The first direction is a left-right direction, and the second direction is an up-down direction; Each transmission mechanism (4) comprises a housing (41) and a transmission assembly (42), wherein the housing (41) forms a receiving chamber (40) inside, and the transmission assembly (42) comprises a first transmission member located in the receiving chamber (40) and sequentially meshing and transmission-connected in the second direction. (421), a second transmission member (422), a third transmission member (423) and a fourth transmission member (424), wherein the first transmission member (421) is located at the bottom of the transmission assembly (42) and the fourth transmission member (424) is located at the top of the transmission assembly (42), the shaft head member (411) is installed on the end surface of the fourth transmission member (424), and the shaft head member (411) protrudes from the housing (41) and is used to be connected to the main shaft (1).

8. The photovoltaic tracking bracket system according to claim 7, wherein: The driving source (3) has an output shaft (30); The first transmission member (421) comprises a first transmission shaft (4210), the two ends of which are coaxially connected to the output shaft (30) and the synchronizing shaft (2), respectively; the first transmission shaft (4210), the output shaft (30) and the synchronizing shaft (2) are all parallel to the shaft head member (411).

9. The photovoltaic tracking bracket system according to claim 8, wherein: The end of the first transmission shaft (4210) close to the output shaft (30) is a power input end (4211), and the power input end (4211) is exposed outside the housing (41) and is directly or indirectly connected to the driving source (3); the end of the first transmission shaft (4210) away from the output shaft (30) is a power output end (4212), and the power output end (4212) is exposed outside the housing (41) and is connected to the synchronization shaft (2).

10. The photovoltaic tracking bracket system according to claim 8, wherein: The first transmission shaft (4210) is connected to the synchronous shaft (2) via a shaft sleeve (6); the shaft sleeve (6) is fixedly sleeved on the periphery of the power input end (4211) and / or the power output end (4212); and the synchronous shaft (2) is fixedly sleeved on the periphery of the shaft sleeve (6).

11. The photovoltaic tracking bracket system according to claim 7, wherein: The second transmission member (422) is meshed above the first transmission member (421), the first transmission member (421) comprises a first bevel gear portion (401), the second transmission member (422) comprises a second bevel gear portion (402), the first bevel gear portion (401) and the second bevel gear portion (402) are meshed to achieve a first reversal of power transmission in a second direction; The fourth transmission member (424) is meshed above the third transmission member (423), the third transmission member (423) includes a threaded portion (405), the fourth transmission member (424) includes a toothed portion (406), and the threaded portion (405) is meshed with the toothed portion (406) to achieve a second reversal of power transmission in the second direction.

12. The photovoltaic tracking bracket system according to claim 7, wherein: The third transmission member (423) is meshed above the second transmission member (422); the second transmission member (422) includes a first external gear portion (403); the third transmission member (423) includes a second external gear portion (404); the first external gear portion (403) is meshed with the second external gear portion (404); the number of teeth of the first external gear portion (403) is less than the number of teeth of the second external gear portion (404).

13. A photovoltaic tracking support system, comprising a main shaft (1) and a transmission mechanism (4), wherein the main shaft (1) has a cavity (10), and the transmission mechanism (4) comprises a shaft head component (411), wherein: The main shaft (1) includes a first plane wall (11), and the shaft head component (411) includes a second plane wall (4111). The shaft head component (411) is inserted into the cavity (10) of the main shaft (1), and the first plane wall (11) and the second plane wall (4111) are connected by a fastener (5), and the first plane wall (11) and the second plane wall (4111) are in close contact with each other.

14. The photovoltaic tracking bracket system according to claim 13, wherein: The photovoltaic tracking bracket system also includes a synchronization shaft (2), the main shaft (1) and the synchronization shaft (2) extend in a first direction and are spaced apart in a second direction, the first direction is perpendicular to the second direction, the transmission mechanism (4) includes N transmission mechanisms (4) spaced apart in the first direction, N being a positive integer greater than 1; and the shaft head components (411) of each adjacent two transmission mechanisms (4) are connected via the synchronization shaft (2).

15. The photovoltaic tracking bracket system according to claim 13, wherein: The photovoltaic tracking support system further comprises a driving source (3), wherein the driving source (3) is connected to the first transmission mechanism (4) in the first direction.

16. The photovoltaic tracking bracket system according to claim 13, wherein: The shaft head components (411) on at least part of the transmission mechanism (4) are two shaft head components that are arranged oppositely.

17. The photovoltaic tracking bracket system according to claim 13, wherein: The first plane walls (11) include at least two, and the two first plane walls (11) are symmetrical relative to the axis of the main shaft (1); the second plane walls (4111) include at least two, and the two second plane walls (4111) are symmetrical relative to the axis of the shaft head component (411), each of the first plane walls (11) is in contact with the corresponding second plane wall (4111), and each of the first plane walls (11) and the corresponding second plane wall (4111) are each fastened to each other by at least one of the fasteners (5).

18. The photovoltaic tracking bracket system according to claim 13, wherein: The axial direction of the shaft head component (411) is consistent with the axial direction of the main shaft (1), the shaft head component (411) has a first cross-sectional shape perpendicular to its own axial direction, and the main shaft (1) has a second cross-sectional shape perpendicular to its own axial direction, and the first cross-sectional shape matches the second cross-sectional shape.

19. The photovoltaic tracking support system according to claim 18, wherein: The second cross-sectional shape of the main axis (1) comprises a first straight line segment (101), a second straight line segment (102), a third straight line segment (103), a fourth straight line segment (104) and a fifth straight line segment (105) which are connected end to end in a circumferential direction to form a closed structure; the main axis (1) takes the perpendicular bisector of the third straight line segment (103) as an axially symmetrical structure, the second straight line segment (102) and the fourth straight line segment (104) are symmetrically arranged, the first straight line segment (101) and the fifth straight line segment (105) are symmetrically arranged, and the second straight line segment (102) and the fourth straight line segment (104) are respectively perpendicularly connected to the third straight line segment (103).

20. The photovoltaic tracking support system according to claim 18, wherein: The second cross-sectional shape of the main shaft (1) comprises a first straight line segment (101), a second straight line segment (102), a third straight line segment (103), a first arc segment (104), a second arc segment (105) and a third arc segment (106) connected end to end in a circumferential direction to form a closed structure; the first arc segment (104) is connected between the second straight line segment (102) and the third straight line segment (103), the second arc segment (105) is connected between the first straight line segment (101) and the second straight line segment (102), the third arc segment (106) is connected between the first straight line segment (101) and the third straight line segment (103), and the first arc segment (104), the second arc segment (105) and the third arc segment (106) are three arcs distributed on the same circle.

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