CN220964765U - Double-shaft tracking type photovoltaic bracket with folding function and photovoltaic device - Google Patents

Abstract

The utility model discloses a double-shaft tracking type photovoltaic bracket with a folding function, which comprises a fixed bracket, a primary driving mechanism and a secondary driving mechanism, wherein the primary driving mechanism can drive the secondary driving mechanism and a photovoltaic plate fixedly connected with the secondary driving mechanism to rotate around the rotation axis of the primary driving mechanism, so that the rotation of the photovoltaic plate around a transverse shaft is realized; the secondary driving mechanism can drive the photovoltaic panel to rotate around the rotation axis of the secondary driving mechanism, so that the photovoltaic panel can rotate around the longitudinal axis. The photovoltaic device has the functions of tracking and folding, so that the photovoltaic device can be installed on a wild wasteland, can be installed on an urban and agricultural land without changing the use property of the land, and solves the installation problem of a photovoltaic plate. The utility model also discloses a double-shaft tracking type photovoltaic device with the folding function.

Description

Double-shaft tracking type photovoltaic bracket with folding function and photovoltaic device

Technical Field

The utility model relates to photovoltaic power generation equipment, in particular to a double-shaft tracking type photovoltaic bracket with a folding function. The utility model also relates to a double-shaft tracking type photovoltaic device with the folding function.

Background

Solar energy has been increasingly used as a clean renewable energy source. The solar photovoltaic power generation equipment uses a solar photovoltaic module as a photoelectric conversion device to convert solar energy into electric energy, so that the solar energy is utilized.

Currently, in order to increase the power generation amount per unit time of a photovoltaic device, it is a common method to enlarge the size of the photovoltaic panel as much as possible. For example, chinese patent publication CN216122306U discloses a photovoltaic device comprising a plurality of photovoltaic panels arranged in a linear manner, so that the size of the photovoltaic panels is significantly increased, and thus the power generation amount can be greatly improved.

Another common method for increasing power generation is by tracking the sun with a photovoltaic panel. This is because the power generation of the photovoltaic power generation apparatus depends on the amount of solar radiation received by the photovoltaic panel. In order to improve the power generation efficiency of the photovoltaic power generation device, the upper surface of the photovoltaic panel is required to be always opposite to the sun, so as to ensure that the vertical irradiation area of sunlight is maximized, and thus the photoelectric conversion efficiency is improved. For example, a photovoltaic bracket for automatically tracking the optimal incident angle of sunlight is disclosed in chinese patent publication CN106130459B, and the photovoltaic bracket has the self-adaptive adjustment function of solar terms with different longitude and latitude and time, so as to ensure that the sunlight irradiates on a photovoltaic panel at the optimal incident angle.

Although the inclination angle and the azimuth angle of the photovoltaic support can be adjusted, the tracking range of the inclination angle is 0-110 degrees, the tracking range of the azimuth angle is-125 degrees and +125 degrees, and obviously the angle adjusting range of the photovoltaic support is limited. And the angle adjustment mode of the photovoltaic bracket is not flexible.

Disclosure of utility model

The technical problem to be solved by the utility model is to provide the double-shaft tracking type photovoltaic bracket with the folding function, which not only can drive the photovoltaic plate to rotate around the transverse shaft, but also can drive the photovoltaic plate to rotate around the longitudinal shaft, so that the angle of the photovoltaic plate can be flexibly adjusted, and the sunlight can be ensured to irradiate on the photovoltaic plate at the optimal incident angle.

In order to solve the technical problems, the technical solution of the double-shaft tracking type photovoltaic bracket with the folding function is as follows:

The device comprises a fixed bracket, a primary driving mechanism and a secondary driving mechanism, wherein the fixed part and the rotating part of the primary driving mechanism can relatively rotate; the fixing piece of the primary driving mechanism is fixedly connected with the fixing bracket; the fixing piece and the rotating piece of the secondary driving mechanism can relatively rotate; the fixing piece of the secondary driving mechanism is fixedly connected with the rotating piece of the primary driving mechanism, and the rotating piece of the secondary driving mechanism is used for being fixedly connected with the photovoltaic panel; the rotation axis of the primary driving mechanism extends transversely; the rotation axis of the secondary driving mechanism extends longitudinally; the primary driving mechanism and/or the secondary driving mechanism further comprises a middle piece, the middle piece is movably connected with the rotating piece, and the middle piece is in guide connection with the rotating piece through a first guide structure; the middle piece is movably connected with the fixing piece, and the middle piece is connected with the fixing piece in a guiding way through a second guiding structure.

In another embodiment, the fixing member is a housing, and the rotating member is a screw rod; or the fixing piece is a screw rod, and the rotating piece is a shell; the middle piece is a sliding sleeve.

In another embodiment, the first guide structure is a helical guide structure; the second guide structure is an axial guide structure; or the first guiding structure is an axial guiding structure; the second guide structure is a spiral guide structure.

In another embodiment, the primary driving mechanism and/or the secondary driving mechanism further comprises a driven member and a driving member, wherein the driven member is fixedly connected with the sliding sleeve; the driving piece is connected with a power source; under the drive of the power source, the driving part drives the driven part, and can drive the sliding sleeve to linearly move along the axial direction of the screw rod.

In another embodiment, the pitch angle of the helical guide is no more than 40 °.

In another embodiment, the pitch angle of the helical guide is greater than 5 ° and less than 25 °.

In another embodiment, the driving member is a screw rod and the driven member is a screw nut; the screw rod rotates to drive the screw rod nut and the sliding sleeve to translate along the axial direction of the screw rod, so that the screw rod and the sliding sleeve rotate relatively, and the screw rod and the shell rotate relatively.

In another embodiment, the sliding sleeve is provided with a through hole, and the sliding sleeve is sleeved on the screw rod through the through hole; the spiral guide structure is a spiral groove arranged on the inner wall of the through hole and a spiral protrusion arranged on the outer peripheral surface of the spiral rod;

In another embodiment, the spiral guide structure is a spiral protrusion arranged on the inner wall of the through hole and a spiral groove arranged on the outer peripheral surface of the spiral rod;

In another embodiment, the spiral guiding structure is a first spiral groove respectively arranged on the inner wall of the through hole, a second spiral groove arranged on the outer circumferential surface of the spiral rod, and a plurality of balls arranged between the first spiral groove and the second spiral groove.

In another embodiment, a first axial guiding structure extending along the axial direction is formed on the outer peripheral surface of the sliding sleeve, and a second axial guiding structure matched with the first axial guiding structure is arranged on the shell; the first axial guiding structure and the second axial guiding structure form the axial guiding structure between the sliding sleeve and the shell.

In another embodiment, the first axial guiding structure is a guiding protrusion and the second axial guiding structure is a guiding groove;

in another embodiment, the first axial guiding structure is a guiding groove and the second axial guiding structure is a guiding protrusion;

In another embodiment, the device further comprises an intermediate piece of the axial guiding structure, wherein the first axial guiding structure and the second axial guiding structure are both guiding grooves, the intermediate piece of the axial guiding structure is arranged between the first axial guiding structure and the second axial guiding structure, and guiding fit is formed through the intermediate piece of the axial guiding structure.

In another embodiment, the primary drive mechanisms are two sets; the two groups of primary driving mechanisms are respectively and fixedly arranged on two sides of the fixed support.

In another embodiment, the axes of rotation of the two sets of primary drive mechanisms are parallel to each other.

In another embodiment, the device further comprises a vertical rod, wherein the vertical rod is fixedly connected with the fixed bracket; the upright extends vertically.

The utility model also provides a double-shaft tracking type photovoltaic device with a folding function, which has the technical proposal that:

The double-shaft tracking type photovoltaic support with the folding function comprises the double-shaft tracking type photovoltaic support with the folding function and a photovoltaic panel, wherein a secondary driving mechanism of the double-shaft tracking type photovoltaic support is connected with the photovoltaic panel; when the rotating piece of the primary driving mechanism and the fixing piece of the primary driving mechanism rotate relatively, the secondary driving mechanism and the photovoltaic panel fixedly connected with the secondary driving mechanism can be driven to rotate around the rotation axis of the primary driving mechanism, so that the photovoltaic panel can rotate around the transverse shaft; when the rotating piece of the secondary driving mechanism and the fixing piece of the secondary driving mechanism rotate relatively, the photovoltaic panel can be driven to rotate around the rotation axis of the secondary driving mechanism, and therefore the photovoltaic panel can rotate around the longitudinal axis.

In another embodiment, the fixing part of the primary driving mechanism is a shell, and the rotating part is a screw rod; the shell of the primary driving mechanism is fixedly connected with the fixed support.

In another embodiment, the fixing part of the secondary driving mechanism is a shell, and the rotating part is a screw rod; the shell of the secondary driving mechanism is fixedly connected with the screw rod of the primary driving mechanism, and the screw rod of the secondary driving mechanism is fixedly connected with the photovoltaic panel.

In another embodiment, the first output end of the screw rod of the primary driving mechanism is fixedly connected with one end of a first connecting arm, and the other end of the first connecting arm is fixedly connected with the lower supporting piece and/or the upper supporting piece; the second output end of the screw rod of the primary driving mechanism is fixedly connected with one end of a second connecting arm, and the other end of the second connecting arm is fixedly connected with a lower supporting piece and/or an upper supporting piece; the shell of the primary driving mechanism is movably connected with one ends of the lower supporting piece and the upper supporting piece, and the lower supporting piece and the upper supporting piece can rotate relative to the shell of the primary driving mechanism; the other ends of the lower supporting piece and the upper supporting piece are fixedly connected with a shell of a secondary driving mechanism, and the output end of a screw rod of the secondary driving mechanism is fixedly connected with a photovoltaic plate.

In another embodiment, the fixing part of the primary driving mechanism is a screw rod, and the rotating part is a shell; the screw rod of the primary driving mechanism is fixedly connected with the fixed support.

In another embodiment, the fixing part of the secondary driving mechanism is a screw rod, and the rotating part is a shell; the screw rod of the secondary driving mechanism is fixedly connected with the shell of the primary driving mechanism, and the shell of the secondary driving mechanism is fixedly connected with the photovoltaic panel.

In another embodiment, two ends of the screw rod of the primary driving mechanism are fixedly connected with the fixed support through connecting pieces respectively, the shell of the primary driving mechanism is fixedly connected with one ends of the lower supporting piece and the upper supporting piece, and the other ends of the lower supporting piece and the upper supporting piece are fixedly connected with two ends of the screw rod of the secondary driving mechanism; the shell of the secondary driving mechanism is fixedly connected with the photovoltaic panel.

The utility model has the following technical effects:

The photovoltaic device has the functions of tracking and folding, so that the photovoltaic device can be installed on a wild wasteland, can be installed on an urban and agricultural land without changing the use property of the land, and solves the installation problem of a photovoltaic plate.

Specifically, when the photovoltaic device is installed on the agricultural land, the tracking angle of the photovoltaic panel is adjusted to shield according to the illumination intensity required by planting vegetation on the agricultural land, so that the illumination time of the vegetation can be controlled.

Therefore, on one hand, the problem that the installation field of the existing photovoltaic equipment is limited can be solved, the installation range of the existing photovoltaic equipment is limited to the field barren land, and the existing photovoltaic equipment can be installed on all lands without affecting the original agricultural planting function of the lands, so that the method has great significance for the land protection policy of keeping 18 hundred million mu of land red lines.

On the other hand, when the solar energy power generation device is installed on the agricultural land, not only can solar energy be converted into electric energy for utilization, but also the agricultural economy can be improved. Specifically, when the photovoltaic panel is folded and furled, the plants can be fully illuminated; and the photovoltaic panel can generate electricity when unfolded. For the camping crops, the photovoltaic panel can also shade plants when being unfolded, so that the protection is formed for the plants, the evaporation of water is reduced, the crop growth environment is optimized, and the agricultural yield is improved.

When photovoltaic tracking is not needed at night, the photovoltaic panel is attached to the upright rod, so that damage to other parts such as the upright rod due to the fact that the photovoltaic panel is unfolded can be reduced as much as possible. The leveling force is reduced, the pressure on the bracket and the base is reduced, and the equipment is more reliable.

Drawings

It will be appreciated by those skilled in the art that the following description is merely illustrative of the principles of the utility model, which can be applied in numerous ways to implement many different alternative embodiments. These descriptions are only intended to illustrate the general principles of the teachings of the present utility model and are not meant to limit the inventive concepts disclosed herein.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and, together with the general description given above and the detailed description of the drawings given below, serve to explain the principles of the utility model.

The utility model is described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is a schematic view of a first embodiment of a dual axis tracking photovoltaic device with folding functionality of the present utility model;

FIG. 2 is an exploded schematic view of a first embodiment of a dual axis tracking photovoltaic device with folding functionality of the present utility model;

FIG. 3 is an exploded schematic view of the drive mechanism of the present utility model;

FIG. 4 is an enlarged partial schematic view of the screw of the present utility model;

FIG. 5 is a schematic diagram of a second embodiment of the present utility model;

FIG. 6 is a schematic diagram of a second embodiment of the present utility model; the first photovoltaic panel assembly is shown in a folded configuration;

FIG. 7 is a schematic diagram of a second embodiment of the T-shaped structure of the present utility model;

fig. 8 is an exploded view of a second embodiment of the T-shaped structure of the present utility model.

The reference numerals in the drawings illustrate:

100 is a first photovoltaic panel, 200 is a second photovoltaic panel,

300 Is a primary drive mechanism, 400 is a secondary drive mechanism,

500 Is a fixed bracket, 600 is a vertical rod,

700 Is a third photovoltaic panel, 800 is a fourth photovoltaic panel,

901 Is a second stage drive mechanism, 900 is a second stage drive mechanism,

501 Is a lower support, 502 is an upper support,

503 Is a first connecting arm, 504 is a second connecting arm,

401 Is a first photovoltaic panel connector, 402 is a second photovoltaic panel connector,

101 Is a first connection ring of a first photovoltaic panel,

102 Is a second connection ring of the first photovoltaic panel,

201 Is a first connection ring of a second photovoltaic panel,

202 Is a second connection ring of a second photovoltaic panel,

11 Is a screw rod, 12 is a sliding sleeve,

13 Is a mounting seat, 14 is a screw rod,

15 Is a screw nut, 16 is a shell,

17 Is a first bearing, 18 is a second bearing,

1101, 1102 Are helical protrusions,

1201 Is a guide groove, 1202 is a helical groove,

Reference numeral 1203 denotes a fixing member positioning hole, and 1601 denotes a guide projection.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model. Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" and the like means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof without precluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

As shown in fig. 1, a first embodiment of the dual-axis tracking type photovoltaic device with folding function according to the present utility model includes a vertical rod 600, a first photovoltaic panel 100, and a second photovoltaic panel 200, wherein the vertical rod 600 extends vertically, the upper end of the vertical rod 600 is fixedly connected with a fixing bracket 500, one side of the fixing bracket 500 is fixedly connected with a primary driving mechanism 300, and the rotation axis of the primary driving mechanism 300 extends transversely; the primary driving mechanism 300 is connected with the secondary driving mechanism 400, and the rotation axis of the secondary driving mechanism 400 extends longitudinally; the primary driving mechanism 300 and the secondary driving mechanism 400 form a T-shaped structure; one side of the secondary driving mechanism 400 is fixedly connected with the inner side edge of the first photovoltaic panel 100, and the other side of the secondary driving mechanism 400 is fixedly connected with the inner side edge of the second photovoltaic panel 200;

The primary drive mechanism 300 has a housing 16 and a screw 11, the screw 11 being capable of effecting relative rotation with the housing 16; the primary driving mechanism 300 can drive the secondary driving mechanism 400 and the first photovoltaic panel 100 and the second photovoltaic panel 200 fixedly connected with the secondary driving mechanism 400 to rotate around the rotation axis (i.e. the transverse axis) of the primary driving mechanism 300;

Specifically, as shown in fig. 2, the housing 16 of the primary drive mechanism 300 is fixedly connected to the fixed bracket 500; the lower part of the shell 16 is movably connected with one end of the lower supporting piece 501, and the upper part of the shell 16 is movably connected with one end of the upper supporting piece 502; the upper support 502 and the lower support 501 form a transmission mechanism fixing cover, one end of the transmission mechanism fixing cover wraps the middle part of the shell 16, and the transmission mechanism fixing cover can rotate relative to the shell 16; the other end of the transmission mechanism fixing cover wraps the secondary driving mechanism 400 inside, so that the movable connection between the secondary driving mechanism 400 and the shell 16 of the primary driving mechanism 300 is realized;

The first output end of the screw rod 11 of the primary driving mechanism 300 is fixedly connected with one end of a first connecting arm 503, and the other end of the first connecting arm 503 is fixedly connected with a lower supporting piece 501 and/or an upper supporting piece 502; the second output end of the screw rod 11 of the primary driving mechanism 300 is fixedly connected with one end of a second connecting arm 504, and the other end of the second connecting arm 504 is fixedly connected with a lower supporting piece 501 and/or an upper supporting piece 502; the screw rod 11 of the primary driving mechanism 300 is fixedly connected with the secondary driving mechanism 400 through the first connecting arm 503 and the second connecting arm 504;

When the screw rod 11 of the primary driving mechanism 300 rotates relative to the housing 16, the secondary driving mechanism 400 can be driven to rotate relative to the housing 16 and the upright rod 600 fixedly connected with the housing 16, so that the rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200 around the transverse axis is realized;

The structure of the secondary drive mechanism 400 is the same as the primary drive mechanism 300; the secondary drive mechanism 400 is capable of driving the first photovoltaic panel 100 and the second photovoltaic panel 200 to rotate about a rotational axis (i.e., a longitudinal axis) of the secondary drive mechanism 400;

Specifically, the housing 16 of the secondary driving mechanism 400 is fixedly connected with a transmission mechanism fixing cover composed of an upper support 502 and a lower support 501; a first output end of the spiral rod 11 of the secondary driving mechanism 400 is fixedly connected with a first photovoltaic panel connecting piece 401, and a second output end of the spiral rod 11 of the secondary driving mechanism 400 is fixedly connected with a second photovoltaic panel connecting piece 402; the first photovoltaic panel connector 401 is fixedly connected with the first connecting ring 101 of the first photovoltaic panel 100 and the first connecting ring 201 of the second photovoltaic panel 200, and the second photovoltaic panel connector 402 is fixedly connected with the second connecting ring 102 of the first photovoltaic panel 100 and the second connecting ring 202 of the second photovoltaic panel 200, so that the screw rod 11 of the secondary driving mechanism 400 is fixedly connected with the first photovoltaic panel 100 and the second photovoltaic panel 200;

When the screw rod 11 of the secondary driving mechanism 400 rotates relative to the housing 16 thereof, the screw rod can drive the first photovoltaic panel 100 and the second photovoltaic panel 200 to rotate relative to the housing 16 of the secondary driving mechanism 400 and the transmission mechanism fixing cover fixedly connected with the housing 16, thereby realizing the rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200 around the longitudinal axis.

The primary driving mechanism 300 can drive the photovoltaic panel to rotate around the transverse axis, the secondary driving mechanism 400 can drive the photovoltaic panel to rotate around the longitudinal axis, the angles of the primary driving mechanism 300 and the secondary driving mechanism 400 can be controlled at will, and therefore sunlight can be ensured to irradiate the photovoltaic panel at the optimal incident angle, and the photoelectric conversion efficiency is improved.

The primary driving mechanism 300 and the secondary driving mechanism 400 of the present utility model have the same structure, and the driving mechanism shown in fig. 3 may be used; as a first embodiment of the driving mechanism of the present utility model, the driving mechanism includes a screw rod 11 (as a rotating member), both ends 1101 of the screw rod 11 serving as output ends of the driving mechanism; the output end of the primary driving mechanism 300 is used for connecting the first connecting arm 503 and the second connecting arm 504, and the output end of the secondary driving mechanism 400 is used for connecting the first photovoltaic panel connecting piece 401 and the second photovoltaic panel connecting piece 402; a sliding sleeve 12 is movably sleeved on the spiral rod 11;

The sliding sleeve 12 is provided with a through hole, and the sliding sleeve 12 is sleeved on the spiral rod 11 through the through hole; the outer circumferential surface of the screw rod 11 is formed with a screw protrusion 1102 extending helically around the axis thereof, and the inner wall of the through hole of the sliding sleeve 12 is formed with a screw groove 1202 adapted to the screw protrusion 1102; the spiral protrusion 1102 and the spiral groove 1202 are combined into a spiral guiding structure; the spiral guide connection between the sliding sleeve 12 and the spiral rod 11 is realized through the cooperation of the spiral groove 1202 and the spiral protrusion 1102;

The spiral guiding structure between the sliding sleeve 12 and the spiral rod 11 can also adopt other structures capable of generating spiral guiding effect; for example, a spiral groove may be provided on the outer peripheral surface of the screw rod 11, and a spiral protrusion may be provided on the inner wall of the through hole of the slide sleeve 12; or a first spiral groove is arranged on the inner wall of the through hole of the sliding sleeve 12, a second spiral groove is arranged on the outer circumferential surface of the spiral rod 11, and a plurality of balls are arranged between the first spiral groove and the second spiral groove, so that spiral guiding connection between the sliding sleeve 12 and the spiral rod 11 can be realized.

The sliding sleeve 12 is connected with a transmission piece; the transmission part comprises a driving part connected with the power source and a driven part fixedly connected with the sliding sleeve 12; the driving piece drives the driven piece under the drive of the power source, so that the sliding sleeve 12 is driven to linearly move along the axial direction of the screw rod 11;

specifically, a fixing piece positioning hole 1203 is formed in the sliding sleeve 12, a lead screw nut 15 (driven piece) is arranged in the fixing piece positioning hole 1203 in a penetrating mode, and the lead screw nut 15 is fixedly connected with the sliding sleeve 12 through a plurality of bolts; the screw nut 15 is provided with an internal threaded hole, and the screw nut 15 is movably connected with the screw 14 (driving piece) through the internal threaded hole;

Two ends of the screw rod 14 are respectively connected with the mounting seat 13 through a first bearing 17; the screw rod 14 can rotate relative to the fixedly arranged mounting seat 13; one end of the screw rod 14 is used as an input end of the driving mechanism and is connected with a power source; the power source can be an electric motor driven by electricity or a cylinder driven by compressed air or a hydraulic cylinder driven by liquid, etc.;

Two ends of the screw rod 11 are respectively and movably connected with the mounting seat 13 through second bearings 18; the screw rod 11 can rotate relative to a fixedly arranged mounting seat 13;

The outer cover of the screw 11 is provided with a housing 16 (as a fixing member);

The outer circumferential surface of the sliding sleeve 12 is provided with a first axial guiding structure extending along the axial direction, and the shell 16 is provided with a second axial guiding structure matched with the first axial guiding structure; the first axial guiding structure is matched with the second axial guiding structure;

specifically, the outer peripheral surface of the sliding sleeve 12 is formed with a guide groove 1201 extending in the axial direction as a first axial guide structure, and the inner wall of the housing 16 is formed with a guide projection 1601 that mates with the guide groove 1201 of the sliding sleeve 12 as a second axial guide structure; the movable connection between the sliding sleeve 12 and the shell 16 is realized through the matching of the guide groove 1201 and the guide protrusion 1601;

Of course, the first axial guiding structure may be a guiding protrusion, and the second axial guiding structure may be a guiding groove; alternatively, the first axial guide structure and the second axial guide structure are both guide grooves, and a plurality of intermediate members of the axial guide structures are disposed between the first axial guide structure and the second axial guide structure to form a guide fit, such as balls, so that the sliding sleeve 12 and the housing 16 can be movably connected.

The driving mechanism of the utility model works as follows:

the power source (such as a motor) drives the screw rod 14 to rotate, and the rotation of the screw rod 14 drives the screw rod nut 15 to do translational motion along the axial direction of the screw rod 14; the screw nut 15 drives the sliding sleeve 12 to axially translate along the screw rod 11, and the sliding sleeve 12 drives the screw rod 11 to rotate around the rotation axis of the screw rod 11 through the matching guiding action of the spiral groove 1202 and the spiral protrusion 1102 in the translation process, so that the screw rod 11 is rotated at a small angle.

Because the sliding sleeve 12 is matched with the guide protrusion 1601 through the guide groove 1201, the sliding sleeve 12 is movably connected with the shell 16, and the translational movement of the sliding sleeve 12 driven by the screw nut 15 can be guided by the guide groove 1201 and the guide protrusion 1601, so that the linear movement of the sliding sleeve 12 is prevented from being influenced by the rotation of the screw rod 11.

The present utility model enables the screw rod 11 to rotate in a small angular range (e.g., no more than 360 °) by a power source. The maximum rotation angle of the screw 11 depends on the size of the helix angle of the screw protrusion 1102 of the screw 11 and the length of the screw 11. The small angle rotation of the screw 11 within a range of not more than 180 ° can be achieved by adjusting the pitch angle of the screw boss 1102 of the screw 11, and the length of the screw 11.

Preferably, the pitch angle of the helical guide structure is no more than 40 °; the helix angle of the spiral guide structure refers to the angle a between the spiral guide structure (i.e. the spiral protrusion 1102) and the rotation axis of the spiral rod 11, as shown in fig. 4.

Because the degree of the helix angle is not more than 40 degrees, when the screw rod 11 needs to rotate, the screw rod 14 is driven by a power source to rotate, and the screw rod 14 can easily drive the screw rod nut 15 and the sliding sleeve 12 to do translational motion along the axis of the screw rod 11, so that the screw rod 11 is driven to rotate. The present utility model can realize low-speed rotation of the screw rod 11 without a speed reducing mechanism.

In the use process, when the photovoltaic panel applies torsion to the spiral rod 11 under the action of external force (for example, the spiral rod 11 receives huge torsion caused by strong wind blowing to the photovoltaic panel), the spiral rod 11 can transmit the external force to the sliding sleeve 12; because the spiral guide connection is realized between the spiral rod 11 and the sliding sleeve 12 through the cooperation of the spiral protrusion 1102 and the spiral groove 1202, according to the stress analysis, the spiral rod 11 can apply the thrust along the axial direction of the spiral rod 11 and the thrust along the circumferential direction of the spiral rod 11 to the sliding sleeve 12, so that the sliding sleeve 12 generates the movement trend of translation along the axial direction and rotation along the circumferential direction under the action of the thrust along the axial direction;

However, due to the guiding engagement of the guiding groove 1201 and the guiding protrusion 1601, the sliding sleeve 12 can only move linearly along the axis of the screw rod 11 relative to the housing 16 and cannot rotate, so that the pushing force of the sliding sleeve 12 along the circumferential direction of the screw rod 11 is directly transmitted to the housing 16, that is, to the member for fixing the housing 16.

Meanwhile, in the process of driving the screw rod 14 to rotate, the screw rod 14 can provide a retaining force for the sliding sleeve 12 through the screw rod nut 15, so that thrust force, along the axis direction of the screw rod 11, born by the sliding sleeve 12 can be counteracted.

Under the combined action of the shell 16 and the power source, the driving shaft 301 can avoid the abnormal movement of the sliding sleeve 12 relative to the screw rod 11 when encountering strong wind during the working process, thereby avoiding the abnormal rotation of the screw rod 11 caused by strong wind.

Therefore, the screw rod 11 of the present utility model has a better resistance against external force, and the rotation state thereof is not affected by the external force.

More preferably, the pitch angle of the helical guide is greater than 5 ° and less than 25 °.

Obviously, the smaller the degree of the helix angle, the smaller the thrust along the axial direction of the screw rod 11, and at this time, only a smaller power source is required to keep the screw rod 11 stationary, so as to prevent the screw rod 11 from being rotated by the torsion from the external load.

Further, when the degree of the helix angle is sufficiently small, the screw rod 11 can be kept still without any power source; at this time, the thrust force in the axial direction of the screw 11 after the external force is decomposed is equal to the friction force between the guide groove 1201 and the guide protrusion 1601.

At a diameter of the screw rod 11 of 50mm, in the case of different degrees of the helix angle of the helical guide structure, the following data were measured in combination with a limited number of experiments at different angles:

When a 1000 newton force is applied to the screw 11 at a degree of the helix angle of 40 degrees, the force required to be applied along the axial direction of the screw 11 is about 850 newtons in order to keep the screw 11 stationary; and in order to carry a load of 1000 newtons, it is necessary to provide an urging force of about 1200 newtons in the axial direction of the screw rod 11.

When a force of 1000 newtons is applied to the screw 11 at a degree of 28 degrees of the helix angle, the force required to be applied along the axial direction of the screw 11 is about 500 newtons in order to keep the screw 11 stationary; and in order to carry a load of 1000 newtons, it is necessary to provide an urging force of about 680 newtons in the axial direction of the screw 11.

When a 1000 newton force is applied to the screw 11 at a pitch angle of 18 degrees, the force required to be applied along the axial direction of the screw 11 is about 310 newtons in order to keep the screw 11 stationary; and in order to carry a load of 1000 newtons, it is necessary to provide an urging force of about 450 newtons in the axial direction of the screw rod 11.

When a force of 1000 newtons is applied to the screw 11 at a degree of the helix angle of 14 degrees, the force required to be applied along the axial direction of the screw 11 is about 230 newtons in order to keep the screw 11 stationary; and in order to carry a load of 1000 newtons, the pushing force required to be provided along the axial direction of the screw 11 is about 320 newtons.

When a 1000 newton force is applied to the screw 11 at a pitch angle of 10 degrees, the force required to be applied in the axial direction of the screw 11 is about 150 newtons in order to keep the screw 11 stationary; and in order to carry a load of 1000 newtons, the pushing force required to be provided along the axial direction of the screw rod 11 is about 210 newtons.

When a force of 1000 newtons is applied to the screw 11 at a degree of 5 degrees of the helix angle, the force required to be applied in the axial direction of the screw 11 is about 75 newtons in order to keep the screw 11 stationary; and in order to carry a load of 1000 newtons, the pushing force required to be provided in the axial direction of the screw 11 is about 110 newtons.

As is apparent from the above experimental data, when the number of degrees of the helical angle is smaller, only a smaller power source is required to drive the load with the same weight, and at the same time, only a smaller power source is required to keep the helical rod 11 from rotating relative to the sliding sleeve 12.

Therefore, the utility model can greatly reduce the power requirement on the power source of the driving mechanism, and the posture of the photovoltaic panel can be kept only by a motor with smaller power, so that the upper surface of the photovoltaic panel keeps the posture facing the sun. The concrete steps are as follows:

The dead weight of the photovoltaic panel is transmitted to the screw rod 11 through the shell 16 and the sliding sleeve 12, and then transmitted to the screw rod 14; because the guide structure extending along the axial direction is arranged between the shell 16 and the sliding sleeve 12, the spiral guide structure is arranged between the sliding sleeve 12 and the spiral rod 11, and the self weight of the photovoltaic panel can be dispersed by the two guide structures, so that the direct influence of the self weight of the photovoltaic panel on the screw rod 14 is avoided. When the photovoltaic panel stops rotating, the two guide structures can keep the working posture (the posture shown in fig. 5) of the photovoltaic panel, so that the power of the power source can only drive the spiral rod 11 to rotate, and the power requirement on the power source is reduced.

Similarly, when the photovoltaic panel receives an external force (such as strong wind), the external force received by the photovoltaic panel needs to be transmitted to the screw rod 11 through the sliding sleeve 12 by the shell 16, and then transmitted to the screw rod 14; the external forces do not have a direct influence on the screw 14 as such.

Further, the degree of the helix angle due to the helical guide structure does not exceed 40 °; particularly, when the degree of the helix angle is more than 5 degrees and less than 25 degrees, the spiral guide structure can greatly reduce the acting force transmitted to the screw rod 14, namely the acting force transmitted to the power source can be greatly reduced; the screw rod 14 can counteract the external force with only small additional power to maintain the original working posture, so that the power requirement on the power source can be further reduced, namely, the external force can be resisted only by a motor with smaller power.

According to the utility model, under severe weather or special conditions, the primary driving mechanism 300 can be controlled to fold the photovoltaic panel, so that the influence of the whole wind or other conditions on the photovoltaic panel is reduced, the windward resistance is reduced, the damage risk of wind power to equipment is reduced, and the equipment is more durable. The photovoltaic board snow can also be avoided under the folded state, and the power generation attenuation rate is also reduced, so that the equipment is more durable.

The middle piece (namely the sliding sleeve 12) and the rotating piece (namely the screw rod 11) of the first embodiment of the driving mechanism are in guide connection through a first guide structure; the middle piece (namely the sliding sleeve 12) and the fixed piece (namely the shell 16) are connected in a guiding way through a second guiding structure; wherein the first guiding structure is a spiral guiding structure; the second guiding structure is an axial guiding structure.

Obviously, the first guiding structure can be an axial guiding structure, and the second guiding structure can be a spiral guiding structure. As shown in fig. 7 and 8, as a second embodiment of the T-shaped structure of the present utility model, the primary driving mechanism 300 includes a straight guide cylinder 300-11, and a screw rod 300-14 is penetrated inside the straight guide cylinder 300-11; a screw nut 300-15 is movably sleeved on the screw rod 300-14; the sliding sleeve 300-12 is movably sleeved outside the straight guide cylinder 300-11; the outer part of the sliding sleeve 300-12 is movably sleeved with a shell 300-16; the screw nut 300-15 is fixedly connected with the sliding sleeve 300-12;

The periphery of the straight guide cylinder 300-11 is provided with a straight guide groove extending along the axial direction, the inner hole of the sliding sleeve 300-12 is provided with a straight guide protrusion extending along the axial direction, and an axial guide structure is formed between the periphery of the straight guide cylinder 300-11 and the inner hole of the sliding sleeve 300-12;

The periphery of the sliding sleeve 300-12 is provided with a spiral groove, the inner hole of the shell 300-16 is provided with a spiral protrusion, and a spiral guide structure is formed between the periphery of the sliding sleeve 300-12 and the inner hole of the shell 300-16;

Specifically, the outside of the screw nut 300-15 is fixedly provided with an inserting sheet 300-1501, the side part of the straight guide cylinder 300-11 is provided with a guide long groove 300-1101 extending along the axial direction, and the inserting sheet 300-1501 is movably arranged in the guide long groove 300-1101 of the straight guide cylinder 300-11;

The side part of the sliding sleeve 300-12 is provided with a guide short groove 300-1201 extending along the axial direction, and the inserting sheet 300-1501 is fixedly and movably arranged in the guide short groove 300-1201 of the sliding sleeve 300-12, so that the inserting sheet 300-1501 is fixedly connected with the sliding sleeve 300-12, and the fixed connection between the screw nut 300-15 and the sliding sleeve 300-12 is realized.

The outer casing 300-16 of the primary driving mechanism 300 is fixedly connected with one end of the straight guide rod 400-11 of the secondary driving mechanism 400 through the connecting part 20, so that the secondary driving mechanism 400 and the primary driving mechanism 300 form a T-shaped structure;

The outside of the straight guide rod 400-11 is movably sleeved with a guide cylinder 400-12; the periphery of the straight guide rod 400-11 is provided with a straight guide groove 400-1101 extending along the axial direction, the inner hole of the guide cylinder 400-12 is provided with a straight guide protrusion extending along the axial direction, and an axial guide structure is formed between the periphery of the straight guide rod 400-11 and the inner hole of the guide cylinder 400-12;

One end of the inner hole of the guide cylinder 400-12 is movably connected with the screw rod 400-14 through an inner threaded hole; the outer movable sleeve of the guide cylinder 400-12 is provided with an outer cylinder 400-16; the outer circumference of one end of the guide cylinder 400-12 is provided with a spiral groove, the inner hole of the outer cylinder 400-16 is provided with a spiral protrusion, and a spiral guide structure is formed between the outer circumference of one end of the guide cylinder 400-12 and the inner hole of the outer cylinder 400-16.

The second embodiment of the drive mechanism of the present utility model operates as follows:

The screw rod 300-14 of the primary driving mechanism 300 is driven to rotate by a power source (such as a motor), and the rotation of the screw rod 300-14 drives the screw rod nut 300-15 to do translational motion along the axial direction of the screw rod 300-14; the screw nut 300-15 drives the sliding sleeve 300-12 to axially translate along the straight guide cylinder 300-11 through the inserting sheet 300-1501, and the sliding sleeve 300-12 drives the shell 300-16 to rotate around the rotation axis of the shell 300-16 through the matching guiding action of the spiral guide structure between the sliding sleeve 300-12 and the shell 300-16 in the translation process, so that the small-angle rotation of the shell 300-16 is realized, and the secondary driving mechanism 400 and the first photovoltaic panel 100 and the second photovoltaic panel 200 connected with the secondary driving mechanism are driven to integrally rotate around the rotation axis of the primary driving mechanism 300, so that the rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200 around the transverse axis is realized;

The screw rod 400-14 of the secondary driving mechanism 400 is driven to rotate by another power source, and the rotation of the screw rod 400-14 drives the guide cylinder 400-12 to do linear motion along the axial direction; because the guide cylinder 400-12 and the outer cylinder 400-16 are provided with the spiral guide structure, the guide cylinder 400-12 drives the outer cylinder 400-16 of the secondary driving mechanism 400 to rotate around the rotation axis of the outer cylinder 400-12 during the linear motion process, so that the small-angle rotation of the outer cylinder 400-16 is realized; the outer cylinder 400-16 of the secondary drive mechanism 400 drives the first photovoltaic panel 100 and the second photovoltaic panel 200 to rotate about the rotation axis of the secondary drive mechanism 400, thereby effecting rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200 about the longitudinal axis.

As shown in fig. 5, a second embodiment of the dual-axis tracking type photovoltaic device with folding function according to the present utility model is different from the first embodiment in that the other side of the fixed bracket 500 is fixedly connected to a second primary driving mechanism 901 extending in the transverse direction, and the second primary driving mechanism 901 is connected to a second secondary driving mechanism 900 extending in the longitudinal direction; one side of the second-stage driving mechanism 900 is fixedly connected to the inner side of the third photovoltaic panel 700, and the other side of the second-stage driving mechanism 900 is fixedly connected to the inner side of the fourth photovoltaic panel 800.

The connection relationship between the second primary driving mechanism 901 and the second secondary driving mechanism 900 is the same as the connection relationship between the secondary driving mechanism 300 and the secondary driving mechanism 400, and the connection relationship between the second secondary driving mechanism 900 and the third photovoltaic panel 700 and the fourth photovoltaic panel 800 is the same as the connection relationship between the secondary driving mechanism 400 and the first photovoltaic panel 100 and the second photovoltaic panel 200, which are not described herein again.

In the second embodiment of the present utility model, the first photovoltaic panel 100 and the second photovoltaic panel 200 (i.e., the first photovoltaic panel assembly) are disposed on one side of the upright post 600, and the third photovoltaic panel 700 and the fourth photovoltaic panel 800 (i.e., the second photovoltaic panel assembly) are disposed on the other side of the upright post 600, so that the first photovoltaic panel assembly and the second photovoltaic panel assembly are respectively disposed on both sides of the upright post 600 along the rotation axis of the transverse axis, and in the process of rotating the photovoltaic panel assemblies around the transverse axis, no matter the photovoltaic panels are in any posture, the first photovoltaic panel 100 and the second photovoltaic panel 200 do not shade the third photovoltaic panel 700 and the fourth photovoltaic panel 800, and vice versa, so that the lighting surface of each photovoltaic panel can be always kept to be the maximum.

Preferably, the axis of rotation of the primary drive mechanism 300 is parallel to the axis of rotation of the secondary primary drive mechanism 901.

Of course, even if the rotation axis of the primary driving mechanism 300 is not parallel to the rotation axis of the secondary driving mechanism 901, the first photovoltaic panel assembly and the second photovoltaic panel assembly can be prevented from interfering with each other by changing the width of the fixing bracket 500 so that a sufficient space is provided between the primary driving mechanism 300 and the secondary driving mechanism 901, thereby preventing the photovoltaic panels from affecting the power generation efficiency due to shielding each other.

The second embodiment of the utility model can simultaneously arrange four photovoltaic panels, and can balance the stress of the vertical rods while increasing the number of the photovoltaic panels to improve the power generation capacity.

The working principle of the double-shaft tracking type photovoltaic device with the folding function is as follows:

the spiral rod 11 of the primary driving mechanism 300 is driven to rotate by a power source, the secondary driving mechanism 400 and the first photovoltaic panel 100 and the second photovoltaic panel 200 connected with the secondary driving mechanism are driven to rotate as a whole around the rotation axis of the primary driving mechanism 300, and therefore the rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200 around the transverse axis is achieved;

The spiral rod 11 of the secondary driving mechanism 400 is driven to rotate by another power source to drive the first photovoltaic panel 100 and the second photovoltaic panel 200 to rotate around the rotation axis of the secondary driving mechanism 400, so that the rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200 around the longitudinal axis is realized;

The rotation numbers of the screw rods 14 of the primary driving mechanism 300 and the secondary driving mechanism 400 are respectively controlled to adjust the rotation angles of the screw rods 11, so that the rotation angles of the first photovoltaic panel 100 and the second photovoltaic panel 200 around the transverse axis and the longitudinal axis can be respectively controlled, and the accurate tracking of the sun is realized;

When strong wind is encountered, the rotation angles of the spiral rods 11 of the primary driving mechanism 300 and the secondary driving mechanism 400 are respectively adjusted, so that the planes of the first photovoltaic panel 100 and the second photovoltaic panel 200 are parallel to the vertical rod 600, and the first photovoltaic panel 100 and the second photovoltaic panel 200 are rotated to the lowest point, thereby enabling the surfaces of the first photovoltaic panel 100 and the second photovoltaic panel 200 to be close to and attached to the upright post 600, reducing the wind area of the photovoltaic panels, and further realizing folding and gathering of the photovoltaic panels, as shown in fig. 6.

The first embodiment and the second embodiment are that the shell 16 of the primary driving mechanism 300 is fixedly connected with the fixed bracket 500, the screw rod 11 of the primary driving mechanism 300 is fixedly connected with the shell 16 of the secondary driving mechanism 400, and the screw rod 11 of the secondary driving mechanism 400 is fixedly connected with the photovoltaic panel; that is, the housing 16 of the primary driving mechanism 300 and the secondary driving mechanism 400 are respectively used as a fixed member, and the screw rod 11 is used as a rotating member. It is obvious that the rotation of the photovoltaic panel around the transverse axis and around the longitudinal axis can be achieved by using the screw rods 11 of the primary driving mechanism 300 and the secondary driving mechanism 400 as a fixed member and the housing 16 as a rotating member.

Specifically, as a third embodiment of the dual-axis tracking type photovoltaic device with folding function of the present utility model, both ends 1101 of the screw rod 11 of the primary driving mechanism 300 are fixedly connected with the fixing bracket 500 through the connection members, respectively, so that the screw rod 11 of the primary driving mechanism 300 is fixed; the lower part of the shell 16 of the primary driving mechanism 300 is fixedly connected with one end of a lower supporting piece 501, the upper part of the shell 16 of the primary driving mechanism 300 is fixedly connected with one end of an upper supporting piece 502, the upper supporting piece 502 and the lower supporting piece 501 form a transmission mechanism fixing cover, one end of the transmission mechanism fixing cover fixedly wraps the middle part of the shell 16 of the primary driving mechanism 300 in, and the other end of the transmission mechanism fixing cover wraps the secondary driving mechanism 400 in; the other ends of the lower support 501 and the upper support 502 are fixedly connected with the two ends of the screw rod 11 of the secondary driving mechanism 400; the housing 16 of the secondary drive mechanism 400 fixedly connects the first photovoltaic panel 100 and the second photovoltaic panel 200.

The working principle of the third embodiment is as follows:

When the screw rod 14 of the primary driving mechanism 300 is driven to rotate by a power source (such as a motor), the screw rod nut 15 and the sliding sleeve 12 are driven to translate along the axial direction of the screw rod 11; due to the matched guiding action of the spiral groove 1202 and the spiral protrusion 1102, the sliding sleeve 12 can relatively rotate between the sliding sleeve 12 and the spiral rod 11 in the translation process, and the spiral rod 11 is fixed, so that the sliding sleeve 12 can rotate in the translation process and drive the shell 16 to rotate, and small-angle rotation of the shell 16 relative to the spiral rod 11 is realized; the shell 16 of the primary driving mechanism 300 rotates to drive the secondary driving mechanism 400 and the first photovoltaic panel 100 and the second photovoltaic panel 200 connected with the secondary driving mechanism as a whole to rotate around the rotation axis of the primary driving mechanism 300, so that the rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200 around the transverse axis is realized;

The screw rod 14 of the secondary driving mechanism 400 is driven to rotate by another power source, and the sliding sleeve 12 is driven to translate along the axial direction of the screw rod 11, so that the shell 16 of the secondary driving mechanism 400 is driven to rotate relative to the screw rod 11; the housing 16 of the secondary drive mechanism 400 rotates the first photovoltaic panel 100 and the second photovoltaic panel 200 about the axis of rotation of the secondary drive mechanism 400, thereby effecting rotation of the first photovoltaic panel 100 and the second photovoltaic panel 200 about the longitudinal axis.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (14)

1. A dual axis tracking photovoltaic bracket with folding function, comprising:

A fixing bracket is arranged on the upper surface of the bracket,

The first-stage driving mechanism can relatively rotate between the fixed part and the rotating part; the fixing piece of the primary driving mechanism is fixedly connected with the fixing bracket; and

The second-stage driving mechanism can relatively rotate between the fixed part and the rotating part; the fixing piece of the secondary driving mechanism is fixedly connected with the rotating piece of the primary driving mechanism, and the rotating piece of the secondary driving mechanism is used for being fixedly connected with the photovoltaic panel;

The rotation axis of the primary driving mechanism extends transversely; the rotation axis of the secondary driving mechanism extends longitudinally;

The primary driving mechanism and/or the secondary driving mechanism further comprises a middle piece, the middle piece is movably connected with the rotating piece, and the middle piece is in guide connection with the rotating piece through a first guide structure; the middle piece is movably connected with the fixing piece, and the middle piece is connected with the fixing piece in a guiding way through a second guiding structure.

2. The dual-axis tracking photovoltaic bracket with folding function according to claim 1, wherein the fixing member is a housing and the rotating member is a screw rod; or the fixing piece is a screw rod, and the rotating piece is a shell; the middle piece is a sliding sleeve.

3. The dual axis tracking photovoltaic bracket with folding function of claim 2, wherein the first guiding structure is a spiral guiding structure; the second guide structure is an axial guide structure; or the first guiding structure is an axial guiding structure; the second guide structure is a spiral guide structure.

4. The dual axis tracking photovoltaic bracket with folding function according to claim 2, wherein the primary and/or secondary drive mechanism further comprises:

The driven piece is fixedly connected with the sliding sleeve; and

The driving piece is connected with the power source; under the drive of the power source, the driving part drives the driven part, and can drive the sliding sleeve to linearly move along the axial direction of the screw rod.

5. A dual axis tracking photovoltaic support with folding function according to claim 3, characterized in that the pitch angle of the spiral guiding structure is not more than 40 degrees.

6. A dual axis tracking photovoltaic bracket with folding function according to claim 3, characterized in that the degree of helix angle of the spiral guiding structure is more than 5 ° and less than 25 °.

7. The dual-axis tracking photovoltaic bracket with folding function according to claim 4, wherein the driving piece is a screw rod and the driven piece is a screw nut; the screw rod rotates to drive the screw rod nut and the sliding sleeve to translate along the axial direction of the screw rod, so that the screw rod and the sliding sleeve rotate relatively, and the screw rod and the shell rotate relatively.

8. The double-shaft tracking type photovoltaic bracket with the folding function according to claim 3, wherein the sliding sleeve is provided with a through hole, and is sleeved on the screw rod through the through hole; the spiral guide structure is a spiral groove arranged on the inner wall of the through hole and a spiral protrusion arranged on the outer peripheral surface of the spiral rod;

Or the spiral guide structure is a spiral bulge arranged on the inner wall of the through hole and a spiral groove arranged on the outer peripheral surface of the spiral rod;

Or the spiral guide structure is a first spiral groove respectively arranged on the inner wall of the through hole, a second spiral groove arranged on the outer peripheral surface of the spiral rod, and a plurality of balls arranged between the first spiral groove and the second spiral groove.

9. The double-shaft tracking type photovoltaic bracket with the folding function according to claim 2, wherein a first axial guiding structure extending along the axial direction is formed on the outer peripheral surface of the sliding sleeve, and a second axial guiding structure matched with the first axial guiding structure is arranged on the shell; the first axial guiding structure and the second axial guiding structure form the axial guiding structure between the sliding sleeve and the shell.

10. The dual axis tracking photovoltaic bracket with folding function according to claim 9, wherein the first axial guiding structure is a guiding protrusion and the second axial guiding structure is a guiding groove;

or the first axial guiding structure is a guiding groove, and the second axial guiding structure is a guiding protrusion;

Or the device also comprises an intermediate piece of the axial guiding structure, wherein the first axial guiding structure and the second axial guiding structure are both guiding grooves, the intermediate piece of the axial guiding structure is arranged between the first axial guiding structure and the second axial guiding structure, and guiding fit is formed by the intermediate piece of the axial guiding structure.

11. The dual-axis tracking photovoltaic bracket with folding function according to claim 1, wherein the primary driving mechanisms are two groups; the two groups of primary driving mechanisms are respectively and fixedly arranged on two sides of the fixed support.

12. The dual axis tracking photovoltaic bracket with folding function according to claim 11, wherein the axes of revolution of the two sets of primary drive mechanisms are parallel to each other.

13. The dual axis tracking photovoltaic bracket with folding function of claim 1, further comprising:

the upright rod is fixedly connected with the fixed support; the upright extends vertically.

14. A dual-axis tracking type photovoltaic device with a folding function, which is characterized by comprising the dual-axis tracking type photovoltaic bracket with the folding function as claimed in any one of claims 1 to 13 and a photovoltaic panel, wherein a secondary driving mechanism of the dual-axis tracking type photovoltaic bracket is connected with the photovoltaic panel;

When the rotating piece of the primary driving mechanism and the fixing piece of the primary driving mechanism rotate relatively, the secondary driving mechanism and the photovoltaic panel fixedly connected with the secondary driving mechanism can be driven to rotate around the rotation axis of the primary driving mechanism, so that the photovoltaic panel can rotate around the transverse shaft;

When the rotating piece of the secondary driving mechanism and the fixing piece of the secondary driving mechanism rotate relatively, the photovoltaic panel can be driven to rotate around the rotation axis of the secondary driving mechanism, and therefore the photovoltaic panel can rotate around the longitudinal axis.