A retractable photovoltaic support and its use method

Abstract

The present invention discloses a retractable and expandable photovoltaic bracket and a method for using the same, including a load-bearing frame and a mounting panel, wherein two load-bearing frames and two mounting panels are provided, and the present invention relates to the technical field of photovoltaic brackets. The retractable and expandable photovoltaic bracket and the method for using the same, by providing an extension mechanism, a load-bearing expansion mechanism and a non-reverse positioning mechanism between two load-bearing frames and the mounting panel, enables the device to automatically perform a storage box extension device through the coordinated cooperation of the extension mechanism, the load-bearing expansion mechanism and the non-reverse positioning mechanism, complete the use form transformation, achieve the effect of convenient unfolding and use, convenient single-unit movement and batch transfer, and simultaneously increase the installation area and increase the photovoltaic panel loading capacity on the basis of convenient storage, and simultaneously automatically perform an overall non-reverse limit on the fully extended device body, thereby improving the stability of the device and the convenience of the non-reverse operation of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic brackets, and in particular to a retractable and expandable photovoltaic bracket and a method for using the same. Background Art

[0002] The photovoltaic bracket is a support and mounting frame that is necessary for the installation and display of solar photovoltaic panels. In the prior art, photovoltaic brackets are mostly welded by an angle support frame and four foot pad bearings. Although this method can be used to install photovoltaic panels, it is inevitable that there are still disadvantages in actual use. For example, the device is fixed by welding, which makes it inconvenient to fold and store the photovoltaic bracket as a whole, reducing the space occupied, resulting in inconvenience in the movement of the single unit and the transportation of batches. In order to avoid such problems, a retractable and expandable photovoltaic bracket and a method for using the same are proposed to solve the existing problems. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a retractable and expandable photovoltaic bracket and a method for using the same, which solves the problem that the photovoltaic bracket is inconvenient to fold and store, resulting in the inconvenience of moving and transferring both the single-unit movement and batch transportation of traditional photovoltaic brackets.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a retractable and expandable photovoltaic bracket, including a load-bearing frame and a mounting panel, wherein two load-bearing frames and two mounting panels are provided, and the mounting panel on the same side is fixedly arranged on the top of the load-bearing frame through a bracket, and the two load-bearing frames are fixedly connected with pads on the opposite sides, and auxiliary wheels are provided on the front and rear sides of the bottom of the pads, and an extension mechanism is provided between the two load-bearing frames, and an expansion mechanism used in conjunction with the extension mechanism is provided inside the mounting panel, and a non-reverse positioning mechanism is provided between the pads and the extension mechanism.

[0005] Preferably, the extension mechanism includes a first mounting frame, four of which are provided, and the four first mounting frames are symmetrically arranged at the top and bottom of opposite sides of the two load-bearing frames, a storage plate is rotatably arranged inside the first mounting frame through a rotating shaft, a second mounting frame is rotatably arranged on two of the storage plates at the same height, an internal bidirectional threaded cylinder is arranged between the two second mounting frames, threaded rods are threadedly arranged on the top and bottom of the inner cavity of the internal bidirectional threaded cylinder, and the opposite ends of the two threaded rods are rotatably connected to the opposite sides of the two second mounting frames through bearings, a pre-rotation threaded cylinder is rotatably arranged on the surface of the internal bidirectional threaded cylinder through a bearing, a push plate is fixedly connected to the front and rear sides of the inner cavity of the pre-rotation threaded cylinder, and a baffle used in combination with the push plate is fixedly connected to the front and rear sides of the internal bidirectional threaded cylinder and located inside the pre-rotation threaded cylinder.

[0006] Preferably, the load expansion mechanism includes positioning rods, four of which are provided, and the four positioning rods are symmetrically and rotatably arranged on the front and rear sides of the bottom of the inner cavity of the two mounting panels, the front and rear sides of the bottom of the inner cavity of the mounting panel are slidably provided with mounting seats, and a movable pull rod is rotatably arranged between the diagonally adjacent mounting seats and the positioning rods, one side of the mounting seat is fixedly connected with a push block, the front and rear sides of the inner cavity of the mounting panel are fixedly connected with a limiting sleeve, the limiting sleeve is internally slidably connected with the limiting rod, a first return spring is fixedly connected between the limiting rod and the limiting sleeve, the end of the limiting rod is fixedly connected with a tooth plate, and the tooth plate passes through the mounting panel and extends to the bottom of the mounting panel, the front and rear sides of one side of the mounting panel are provided with a receiving groove, the bottom of the inner cavity of the receiving groove is rotatably provided with a first rotating rod through a bearing, the top of the first rotating rod is fixedly connected with an expansion bearing plate, one end of the first rotating rod passes through and extends to the bottom of the mounting panel, and a driving mechanism is arranged between the first rotating rod and the mounting panel.

[0007] Preferably, the anti-reverse positioning mechanism includes a rotating shaft, which is rotatably arranged between the front and rear sides of the inner cavity of the pad, the front and rear sides of the rotating shaft surface are fixedly connected with main pulleys used in combination with auxiliary wheels, the surface of the rotating shaft is fixedly connected with a ratchet between two main pulleys on the same side, the surface of the pre-rotation threaded cylinder is threadedly connected with a threaded sleeve, both sides of the threaded sleeve are fixedly connected with multiple telescopic sleeves, the bottom of the extended end of the multiple telescopic sleeve is fixedly connected to a limiting slide frame through a bracket, the interior of the limiting slide frame is slidably connected with a pawl used in combination with the ratchet, and a second return spring is fixedly connected between the pawl and the limiting slide frame.

[0008] Preferably, the driving mechanism includes a second rotating rod, which is rotatably arranged at the bottom of the mounting panel through a bearing, and the surface of the second rotating rod is fixedly connected to a gear meshing with the tooth plate, and the surfaces of the first rotating rod and the second rotating rod are both fixedly connected to pulleys, and a belt is connected for transmission between the two pulleys.

[0009] Preferably, the top of the pad is fixedly connected to a limiting sliding rod, the surface of the limiting sliding rod is slidably connected to a limiting sliding sleeve, and one side adjacent to the limiting sliding sleeve is fixedly connected to one side of the limiting sliding frame through a bracket.

[0010] Preferably, the tops of the installation panel and the expansion support plate are both provided with installation pin holes, and a plurality of the installation pin holes are provided at equal intervals.

[0011] Preferably, a slide groove is provided on the front side and the rear side of the bottom of the inner cavity of the installation panel, a slider is slidably connected inside the slide groove, and the top of the adjacent slider is fixedly connected to the bottom of the mounting seat.

[0012] The present invention also discloses a method for using a retractable and expandable photovoltaic support, which specifically comprises the following steps:

[0013] S1. Bracket expansion: After the operator moves the device to the placement site, he holds the inner two-way threaded barrel by hand, and then rotates the pre-rotated threaded barrel in a forward direction, so that the push plate on the inner wall of the pre-rotated threaded barrel fits with the baffle on the surface of the inner two-way threaded barrel after idling for 180 degrees. With the continued rotation of the pre-rotated threaded barrel and the circumferential push of the push plate on the baffle, the inner two-way threaded barrel starts to rotate and start. At this time, the inner two-way threaded barrel is loosened and replaced with a hand-held load-bearing frame. The threaded cooperation of the inner two-way threaded barrel and the threaded rod is manually limited. The inner two-way threaded barrel rotates, and the threaded rods at the top and bottom of its inner cavity are affected by the thread screwing, and are synchronously extended up and down in reverse. The extension of the threaded rod drives the second installation frame to move vertically. The second installation frame moves vertically, and the storage plate that cooperates with its rotation and storage is affected by the thrust and begins to rotate and unfold, and finally flattens. The unfolding of the storage plate synchronously pushes the two load-bearing frames and the installation panel to start load expansion;

[0014] S2, when the pre-rotated threaded barrel is pre-rotated 180 degrees, the pre-rotated threaded barrel is synchronously screwed with its own threads, so that the threaded sleeve on the surface of the pre-rotated threaded barrel drives the multiple telescopic sleeves, the limit sliding frame and the ratchet to descend in advance. During the descent of the multiple telescopic sleeves, the two load-bearing frames will be unfolded to extend the compensation length by themselves. Subsequently, the pre-rotated threaded barrel pushes the baffle with the help of the push plate, so that the inner bidirectional threaded barrel and the pre-rotated threaded barrel can be synchronously rotated to make the device unfold. During the process of device unfolding, the ratchet will form a non-returning cooperation with the ratchet wheel through the descent synchronization, complete the device in the expanded load state, and improve the overall stability;

[0015] S3. When the two installation panels are extended by the reverse displacement of the two load-bearing frames in step 1, the movable pull rod inside the installation panel will continuously move and stretch, causing the movable end of the movable pull rod to drive the push block to slide longitudinally. During the sliding process, the push block will gradually contact the surface of the toothed plate and push the surface of the toothed plate. The toothed plate will be forced to move and will synchronously drive the limit rod to retract into the limit sleeve. While the toothed plate moves, the toothed plate will also mesh with the gear, causing the gear to drive the second rotating rod to rotate. The rotation of the second rotating rod uses the pulley and belt transmission as the medium to drive the first rotating rod to finally rotate 90 degrees. The rotation of the first rotating rod synchronously drives the load-bearing expansion plate to rotate and unfold from the storage slot, further expanding the load-bearing installation area.

[0016] S4. Storage and carrying: reversely rotate the pre-rotated threaded cylinder to make the pre-rotated threaded cylinder and the inner bidirectional threaded cylinder rotate 180 degrees without contact in advance. During the period when the pre-rotated threaded cylinder rotates 180 degrees in the opposite direction alone, the multi-telescopic sleeve, the limit slide frame and the pawl are lifted in advance to make the pawl and the ratchet wheel release the non-return cooperation in advance. Then, with the help of the delayed synchronous rotation of the pre-rotated threaded cylinder and the inner bidirectional threaded cylinder, the second installation frame is vertically reset, the storage plate is folded, and the adjacent load-bearing frames and the installation panel are closed.

[0017] Preferably, a movable through groove slidably matched with the tooth plate is provided at the bottom of the mounting panel in S3.

[0018] Beneficial Effects

[0019] The present invention provides a retractable and expandable photovoltaic support and a method for using the same. Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The retractable and expandable photovoltaic bracket and its use method, by arranging an extension mechanism, a load-bearing expansion mechanism and a non-reverse positioning mechanism between two load-bearing frames and the installation panel, enable the device to automatically perform the storage box extension device through the coordinated cooperation of the extension mechanism, the load-bearing expansion mechanism and the non-reverse positioning mechanism, complete the use form transformation, achieve the effect of convenient deployment and use, convenient single unit movement and batch transfer, and simultaneously increase the installation area and increase the photovoltaic panel loading capacity on the basis of convenient storage, and simultaneously automatically perform the overall non-reverse limit on the fully extended device body, thereby improving the stability of the device and the convenience of the non-reverse operation of the device.

[0021] (2) The telescopic and expandable photovoltaic bracket and its use method are characterized by providing a limit slide rod on the top of the base plate and a limit slide sleeve on the side of the limit slide frame that is slidably matched with the limit slide frame, so that the movement of the threaded sleeve, the multi-telescopic sleeve and the limit slide frame can be stably guided by the sliding limit of the limit slide rod and the limit slide sleeve.

[0022] (3) The retractable and expandable photovoltaic bracket and its use method enable a delayed rotation operation between the pre-rotated threaded barrel and the internal bidirectional threaded barrel by arranging a push plate and a baffle plate between the pre-rotated threaded barrel and the internal bidirectional threaded barrel.

[0023] (4) The retractable and expandable photovoltaic bracket and its use method, by opening a plurality of mounting pin holes on the surface of the mounting panel and the expansion loading plate, enable the mounting panel and the expanded loading plate after the shape change to be able to position and install the photovoltaic panel through the mounting pin holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0025] Figure 2A rear view of the panel structure installed in the present invention;

[0026] Figure 3 A cross-sectional view of the panel installation structure of the present invention;

[0027] Figure 4 A top view of the internal structure of the pre-threaded barrel of the present invention;

[0028] Figure 5 It is an expanded view of the structure of the pre-threaded barrel and the internal bidirectional threaded barrel of the present invention;

[0029] Figure 6 It is an expanded view of the structure of the pre-rotated threaded barrel, the internal bidirectional threaded barrel and the threaded rod of the present invention;

[0030] Figure 7 A top view of the panel installation structure of the present invention;

[0031] Figure 8 A top view of the internal structure of the installation panel of the present invention;

[0032] Fig. 9 A cross-sectional view of the panel structure of the present invention;

[0033] Fig.10 A top view of the internal structure of the mounting base of the present invention;

[0034] Fig.11 A bottom view of the panel installation structure of the present invention;

[0035] Fig.12 It is a schematic diagram of the structure of the expansion mechanism of the present invention;

[0036] Fig.13 It is a schematic diagram of the structure of the expansion mechanism of the present invention;

[0037] Fig.14 It is a schematic diagram of the structure of the anti-reverse positioning mechanism of the present invention;

[0038] Fig.15 For the present invention Figure 3 A partial enlarged view of the middle A;

[0039] Fig.16 It is a schematic diagram of the internal structure of the multi-telescopic sleeve of the present invention.

[0040] In the figure: 1, load-bearing frame; 2, mounting panel; 3, pad; 4, auxiliary wheel; 5, extension mechanism; 501, first mounting frame; 502, storage plate; 503, second mounting frame; 504, inner two-way threaded cylinder; 505, threaded rod; 506, pre-rotated threaded cylinder; 507, push plate; 508, baffle; 6, load-bearing mechanism; 601, positioning rod; 602, mounting seat; 603, movable pull rod; 604, push block; 605, limit sleeve; 606, limit rod; 607, first return spring; 608, tooth plate; 60 9. Storage slot; 610. First rotating rod; 611. Load-expanding supporting plate; 612. Driving mechanism; 6121. Second rotating rod; 6122. Gear; 6123. Pulley; 6124. Belt; 7. Anti-reverse positioning mechanism; 701. Rotating shaft; 702. Main pulley; 703. Ratchet; 704. Threaded sleeve; 705. Multi-telescopic sleeve; 706. Limiting slide frame; 707. Ratchet; 708. Second reset spring; 8. Limiting slide rod; 9. Limiting sleeve; 10. Mounting pin hole; 11. Slide groove; 12. Sliding block. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0042] See also Figure 1-16 The present invention provides a technical solution: a retractable and expandable photovoltaic bracket, including a load-bearing frame 1 and a mounting panel 2, wherein two load-bearing frames 1 and two mounting panels 2 are each provided, and the mounting panels 2 on the same side are fixedly arranged on the top of the load-bearing frame 1 through a bracket, and pads 3 are fixedly connected to the opposite sides of the two load-bearing frames 1, and auxiliary wheels 4 are provided on the front and rear sides of the bottom of the pads 3.

[0043] As a preferred embodiment: in order to facilitate the storage and extension of the device, an extension mechanism 5 is arranged between the two load-bearing frames 1, and the extension mechanism 5 includes a first installation frame 501, and the first installation frame 501 is provided with four, and the four first installation frames 501 are symmetrically arranged at the top and bottom of the opposite side of the two load-bearing frames 1, and the inside of the first installation frame 501 is provided with a storage plate 502 that rotates through a rotating shaft, and the two storage plates 502 at the same height are provided with a second installation frame 503 that rotates together, and an inner bidirectional threaded cylinder 5 is arranged between the two second installation frames 503. 04. The top and bottom of the inner cavity of the internal bidirectional threaded barrel 504 are both threadedly provided with threaded rods 505. The opposite ends of the two threaded rods 505 are rotatably connected to the opposite sides of the two second mounting frames 503 through bearings. The surface of the internal bidirectional threaded barrel 504 is rotatably provided with a pre-rotated threaded barrel 506 through bearings. The front and rear sides of the inner cavity of the pre-rotated threaded barrel 506 are fixedly connected with push plates 507. The front and rear sides of the internal bidirectional threaded barrel 504 and the interior of the pre-rotated threaded barrel 506 are fixedly connected with baffles 508 used in conjunction with the push plates 507.

[0044] As a preferred embodiment: in order to increase the load-bearing surface of the device installation, the interior of the installation panel 2 is provided with an expansion mechanism 6 used in conjunction with the extension mechanism 5, the expansion mechanism 6 includes a positioning rod 601, four positioning rods 601 are provided, and the four positioning rods 601 are symmetrically rotatably arranged on the front and rear sides of the bottom of the inner cavity of the two installation panels 2, the front and rear sides of the bottom of the inner cavity of the installation panel 2 are both slidably provided with mounting seats 602, and a movable pull rod 603 is rotatably arranged between the diagonally adjacent mounting seats 602 and the positioning rods 601, one side of the mounting seat 602 is fixedly connected with a push block 604, the front and rear sides of the inner cavity of the installation panel 2 are both fixedly connected with a limiting sleeve 605, the internal sliding connection of the limiting sleeve 605 is the limiting rod 606, a first return spring 607 is fixedly connected between the limiting rod 606 and the limiting sleeve 605, and the end of the limiting rod 606 is fixedly connected with a tooth plate 608 , and the toothed plate 608 passes through the installation panel 2 and extends to the bottom of the installation panel 2, and a storage groove 609 is opened on the front and rear sides of one side of the installation panel 2. A first rotating rod 610 is rotatably arranged at the bottom of the inner cavity of the storage groove 609 through a bearing, and a load-bearing support plate 611 is fixedly connected to the top of the first rotating rod 610. One end of the first rotating rod 610 passes through and extends to the bottom of the installation panel 2. A driving mechanism 612 is arranged between the first rotating rod 610 and the installation panel 2. The driving mechanism 612 includes a second rotating rod 6121, and the second rotating rod 6121 is rotatably arranged at the bottom of the installation panel 2 through a bearing. A gear 6122 meshing with the toothed plate 608 is fixedly connected to the surface of the second rotating rod 6121, and a pulley 6123 is fixedly connected to the surface of the first rotating rod 610 and the second rotating rod 6121. A belt 6124 is connected for transmission between the two pulleys 6123;

[0045] As a detailed explanation: the tops of the mounting panel 2 and the expansion loading plate 611 are both provided with mounting pin holes 10, and a number of mounting pin holes 10 are equidistantly provided. The front and rear sides of the bottom of the inner cavity of the mounting panel 2 are both provided with sliding grooves 11, and the interior of the sliding grooves 11 is slidingly connected with sliders 12, and the tops of adjacent sliders 12 are fixedly connected to the bottom of the mounting seat 602.

[0046] As a preferred embodiment: In order to facilitate automatic anti-return of the unfolded device and improve its stability, an anti-return positioning mechanism 7 is provided between the pad 3 and the extension mechanism 5, and the anti-return positioning mechanism 7 includes a rotating shaft 701, which is rotatably arranged between the front and rear sides of the inner cavity of the pad 3, and the front and rear sides of the surface of the rotating shaft 701 are fixedly connected with a main pulley 702 used in conjunction with the auxiliary wheel 4, and the surface of the rotating shaft 701 is fixedly connected with a ratchet 703 between the two main pulleys 702 on the same side, and the surface of the pre-rotated threaded cylinder 506 is threadedly connected with a threaded sleeve 70 4. Both sides of the threaded sleeve 704 are fixedly connected with a multiple telescopic sleeve 705, the bottom of the extended end of the multiple telescopic sleeve 705 is fixedly connected to a limit slide frame 706 through a bracket, the inside of the limit slide frame 706 is slidably connected with a pawl 707 used in conjunction with the ratchet 703, a second return spring 708 is fixedly connected between the pawl 707 and the limit slide frame 706, the top of the pad 3 is fixedly connected with a limit slide rod 8, the surface of the limit slide rod 8 is slidably connected with a limit slide sleeve 9, and one side of an adjacent limit slide sleeve 9 is fixedly connected to one side of the limit slide frame 706 through a bracket.

[0047] The present invention also discloses a method for using a retractable and expandable photovoltaic support, which specifically comprises the following steps:

[0048] S1. Bracket expansion: After the operator moves the device to the placement site, he holds the inner two-way threaded barrel 504 by hand, and then rotates the pre-rotated threaded barrel 506 in a forward direction, so that the push plate 507 on the inner wall of the pre-rotated threaded barrel 506 fits with the baffle 508 on the surface of the inner two-way threaded barrel 504 after idling for 180 degrees. With the continued rotation of the pre-rotated threaded barrel 506 and the circumferential push of the baffle 508 by the push plate 507, the inner two-way threaded barrel 504 starts to rotate and start. At this time, the inner two-way threaded barrel 504 is released and replaced with the hand-held load-bearing frame 1. , the threads of the inner bidirectional threaded cylinder 504 and the threaded rod 505 cooperate to limit the position by hand, the inner bidirectional threaded cylinder 504 rotates, and the threaded rods 505 at the top and bottom of its inner cavity are affected by the screwing of the threads, and synchronously extend up and down in opposite directions, the extension of the threaded rod 505 drives the second installation frame 503 to move vertically, and the second installation frame 503 moves vertically, and the storage plate 502 that cooperates with its rotation and storage is affected by the thrust and begins to rotate and unfold, and finally flattened, and the storage plate 502 unfolds and synchronously pushes the two load-bearing frames 1 and the installation panel 2 to start loading;

[0049] S2, when the pre-rotated threaded cylinder 506 idles 180 degrees in advance, the pre-rotated threaded cylinder 506 synchronously rotates its own threads, causing the threaded sleeve 704 on the surface of the pre-rotated threaded cylinder 506 to pre-drive the multiple telescopic sleeve 705, the limit slide frame 706 and the ratchet 707 to descend. During the descent of the multiple telescopic sleeve 705, the two load-bearing frames 1 will be unfolded to extend the compensation length by themselves. Subsequently, the pre-rotated threaded cylinder 506 pushes the baffle 508 with the help of the push plate 507, causing the inner bidirectional threaded cylinder 504 and the pre-rotated threaded cylinder 506 to achieve synchronous rotation. During the process of unfolding the device, the ratchet 707 will form a non-return fit with the ratchet 703 by descending synchronously, completing the device in the expanded load state and improving the overall stability;

[0050] S3, in step 1, when the two mounting panels 2 are extended by the reverse displacement of the two load-bearing frames 1, the movable pull rod 603 inside the mounting panel 2 will continuously move and stretch, causing the movable end of the movable pull rod 603 to drive the push block 604 to slide longitudinally. During the sliding process, the push block 604 will gradually contact the surface of the tooth plate 608 and push the surface of the tooth plate 608. The tooth plate 608 is forced to move and synchronously drive the limit rod 606 to retract into the limit sleeve 605. The tooth plate 608 moves and the tooth plate 608 moves at the same time. The tooth plate 608 also meshes with the gear 6122, causing the gear 6122 to drive the second rotating rod 6121 to rotate. The rotation of the second rotating rod 6121 drives the first rotating rod 610 to rotate 90 degrees through the transmission cooperation of the pulley 6123 and the belt 6124. The rotation of the first rotating rod 610 synchronously drives the expansion bearing plate 611 to rotate and unfold from the storage groove 609, further expanding the installation area. The bottom of the installation panel 2 is provided with a movable through groove that is slidably matched with the tooth plate 608.

[0051] S4. Storage and carrying: reversely rotate the pre-rotated threaded cylinder 506 to cause the pre-rotated threaded cylinder 506 and the inner bidirectional threaded cylinder 504 to rotate 180 degrees without contact in advance. During the period when the pre-rotated threaded cylinder 506 rotates 180 degrees in the opposite direction alone, the multi-telescopic sleeve 705, the limiting sliding frame 706 and the pawl 707 are lifted in advance to cause the pawl 707 and the ratchet wheel 703 to release the non-return cooperation in advance. Then, with the help of the delayed synchronous rotation of the pre-rotated threaded cylinder 506 and the inner bidirectional threaded cylinder 504, the second installation frame 503 is vertically reset, the storage plate 502 is folded, and the adjacent load-bearing frame 1 and the installation panel 2 are closed.

Claims

1. A retractable and expandable photovoltaic support, comprising a load-bearing frame (1) and a mounting panel (2), wherein two of each of the load-bearing frame (1) and the mounting panel (2) are provided, and the mounting panel (2) on the same side is fixedly arranged on the top of the load-bearing frame (1) by a support, characterized in that: A pad (3) is fixedly connected to the opposite sides of the two load-bearing frames (1); auxiliary wheels (4) are arranged on the front and rear sides of the bottom of the pad (3); an extension mechanism (5) is arranged between the two load-bearing frames (1); a load expansion mechanism (6) used in conjunction with the extension mechanism (5) is arranged inside the mounting panel (2); and a non-return positioning mechanism (7) is arranged between the pad (3) and the extension mechanism (5); The extension mechanism (5) comprises a first installation frame (501), four of which are provided, and the four first installation frames (501) are symmetrically arranged at the top and bottom of opposite sides of the two load-bearing frames (1), a storage plate (502) is rotatably arranged inside the first installation frame (501) via a rotation axis, a second installation frame (503) is rotatably arranged on two storage plates (502) at the same height, an internal bidirectional threaded cylinder (504) is provided between the two second installation frames (503), and the top of the inner cavity of the internal bidirectional threaded cylinder (504) is The bottom and the bottom are both threadedly provided with threaded rods (505), the opposite ends of the two threaded rods (505) are rotatably connected to the opposite sides of the two second mounting frames (503) through bearings, the surface of the inner bidirectional threaded cylinder (504) is rotatably provided with a pre-rotation threaded cylinder (506) through bearings, the front and rear sides of the inner cavity of the pre-rotation threaded cylinder (506) are fixedly connected with push plates (507), and the front and rear sides of the inner bidirectional threaded cylinder (504) and located inside the pre-rotation threaded cylinder (506) are fixedly connected with baffles (508) used in conjunction with the push plates (507); The load expansion mechanism (6) comprises positioning rods (601), four of which are provided, and the four positioning rods (601) are symmetrically rotatably provided at the front and rear sides of the bottom of the inner cavity of the two mounting panels (2), the front and rear sides of the bottom of the inner cavity of the mounting panel (2) are both slidably provided with mounting seats (602), and a movable pull rod (603) is rotatably provided between the diagonally adjacent mounting seats (602) and the positioning rods (601), one side of the mounting seat (602) is fixedly connected to a push block (604), the front and rear sides of the inner cavity of the mounting panel (2) are both fixedly connected to a limiting sleeve (605), the interior of the limiting sleeve (605) is slidably connected to the limiting rod (606), and the limiting rod (606) and A first return spring (607) is fixedly connected between the limiting sleeve (605); a tooth plate (608) is fixedly connected to the end of the limiting rod (606); the tooth plate (608) passes through the mounting panel (2) and extends to the bottom of the mounting panel (2); a storage groove (609) is provided on the front and rear sides of one side of the mounting panel (2); a first rotating rod (610) is rotatably arranged at the bottom of the inner cavity of the storage groove (609) via a bearing; a load-bearing expansion plate (611) is fixedly connected to the top of the first rotating rod (610); one end of the first rotating rod (610) passes through and extends to the bottom of the mounting panel (2); a driving mechanism (612) is arranged between the first rotating rod (610) and the mounting panel (2); The anti-reverse positioning mechanism (7) comprises a rotating shaft (701), the rotating shaft (701) is rotatably arranged between the front side and the rear side of the inner cavity of the pad (3), the front side and the rear side of the surface of the rotating shaft (701) are fixedly connected to the main pulley (702) used in conjunction with the auxiliary wheel (4), the surface of the rotating shaft (701) is fixedly connected to the ratchet (703) between the two main pulleys (702) on the same side, the surface of the pre-rotating threaded cylinder (506) is threadedly connected to the threaded sleeve (704), both sides of the threaded sleeve (704) are fixedly connected to the multi-telescopic sleeve (705), the bottom of the extended end of the multi-telescopic sleeve (705) is fixedly connected to the limit sliding frame (706) through a bracket, the interior of the limit sliding frame (706) is slidably connected to a ratchet (707) used in conjunction with the ratchet (703), and a second return spring (708) is fixedly connected between the ratchet (707) and the limit sliding frame (706); The driving mechanism (612) comprises a second rotating rod (6121), the second rotating rod (6121) being rotatably arranged at the bottom of the mounting panel (2) via a bearing, the surface of the second rotating rod (6121) being fixedly connected to a gear (6122) meshing with the toothed plate (608), the surfaces of the first rotating rod (610) and the second rotating rod (6121) being fixedly connected to pulleys (6123), and a belt (6124) being connected for transmission between the two pulleys (6123).

2. The retractable and expandable photovoltaic support according to claim 1, characterized in that: The top of the pad (3) is fixedly connected to a limiting slide rod (8), the surface of the limiting slide rod (8) is slidably connected to a limiting slide sleeve (9), and one side adjacent to the limiting slide sleeve (9) is fixedly connected to one side of a limiting slide frame (706) via a bracket.

3. The retractable and expandable photovoltaic support according to claim 2, characterized in that: The tops of the installation panel (2) and the expansion support plate (611) are both provided with installation pin holes (10), and a plurality of the installation pin holes (10) are provided at equal intervals.

4. The retractable and expandable photovoltaic support according to claim 3, characterized in that: A slide groove (11) is provided on the front and rear sides of the bottom of the inner cavity of the installation panel (2), a slider (12) is slidably connected inside the slide groove (11), and the top of the adjacent slider (12) is fixedly connected to the bottom of the installation seat (602).

5. The method for using the retractable and expandable photovoltaic support according to claim 4, characterized in that: The specific steps include: S1. Bracket expansion: After the operator moves the device to the placement site, he holds the inner bidirectional threaded barrel (504) by hand, and then rotates the pre-rotated threaded barrel (506) in a forward direction, so that the push plate (507) on the inner wall of the pre-rotated threaded barrel (506) fits with the baffle (508) on the surface of the inner bidirectional threaded barrel (504) after idling for 180 degrees. With the continued rotation of the pre-rotated threaded barrel (506) and the circumferential push of the baffle (508) by the push plate (507), the inner bidirectional threaded barrel (504) starts to rotate and start. At this time, the inner bidirectional threaded barrel (504) is released and replaced with the hand-held load-bearing frame (1 ), the threads of the inner bidirectional threaded cylinder (504) and the threaded rod (505) are matched to perform hand-held limiting, the inner bidirectional threaded cylinder (504) rotates, and the threaded rods (505) at the top and bottom of its inner cavity are affected by the screwing of the threads, and synchronously extend in the up and down directions, the threaded rods (505) extend to drive the second installation frame (503) to move vertically, and the second installation frame (503) moves vertically, and the storage plate (502) that cooperates with the rotation and storage thereof is affected by the thrust and begins to rotate and unfold, and finally flattens, and the storage plate (502) unfolds and synchronously pushes the two load-bearing frames (1) and the installation panel (2) to start load expansion; S2, when the pre-rotated threaded cylinder (506) is pre-rotated 180 degrees, the pre-rotated threaded cylinder (506) is synchronously screwed with its own thread, so that the threaded sleeve (704) on the surface of the pre-rotated threaded cylinder (506) drives the multiple telescopic sleeve (705), the limit sliding frame (706) and the ratchet (707) to descend in advance. During the descent process, the multiple telescopic sleeve (705) will extend the compensation length by itself through the expansion of the two load-bearing frames (1). Subsequently, the pre-rotated threaded cylinder (506) pushes the baffle (508) with the help of the push plate (507), so that the inner bidirectional threaded cylinder (504) and the pre-rotated threaded cylinder (506) can achieve synchronous rotation. During the process of the device being deployed, the ratchet (707) will form a non-returning cooperation with the ratchet wheel (703) by descending synchronously, completing the device in the expanded load state, and improving the overall stability; S3, in step 1, when the two mounting panels (2) are extended by the two load-bearing frames (1) in opposite directions, the movable pull rod (603) inside the mounting panel (2) will continuously move and stretch, causing the movable end of the movable pull rod (603) to drive the push block (604) to slide longitudinally. During the sliding process, the push block (604) will gradually contact the surface of the tooth plate (608) and push the surface of the tooth plate (608). The tooth plate (608) is forced to move and synchronously drives the limit rod (606) to move toward the limit sleeve (605). The toothed plate (608) moves and meshes with the gear (6122), causing the gear (6122) to drive the second rotating rod (6121) to rotate. The second rotating rod (6121) rotates to drive the first rotating rod (610) to rotate 90 degrees through the pulley (6123) and the belt (6124). The first rotating rod (610) rotates synchronously to drive the expansion loading plate (611) to rotate and unfold from the storage groove (609), further expanding the loading installation area. S4, storage and carrying: the pre-rotated threaded cylinder (506) is rotated in reverse to cause the pre-rotated threaded cylinder (506) and the inner bidirectional threaded cylinder (504) to rotate 180 degrees without contact in advance. During the period when the pre-rotated threaded cylinder (506) rotates 180 degrees in reverse alone, the multi-telescopic sleeve (705), the limit sliding frame (706) and the pawl (707) are lifted in advance to cause the pawl (707) and the ratchet wheel (703) to release the non-return fit in advance. Then, with the help of the delayed synchronous rotation of the pre-rotated threaded cylinder (506) and the inner bidirectional threaded cylinder (504), the second installation frame (503) is vertically reset, the storage plate (502) is folded, and the adjacent load-bearing frame (1) and the installation panel (2) are closed.

6. The method for using the retractable and expandable photovoltaic support according to claim 5, characterized in that: The bottom of the mounting panel (2) in S3 is provided with a movable through groove which is slidably matched with the tooth plate (608).

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