CN214014153U

CN214014153U - Photovoltaic support easy to assemble and adjust

Info

Publication number: CN214014153U
Application number: CN202022794644.6U
Authority: CN
Inventors: 赵正华
Original assignee: Nantong Zhaori New Energy Co ltd
Current assignee: Nantong Zhaori New Energy Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-08-20
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a photovoltaic support convenient for installation and adjustment, which belongs to the technical field of photovoltaic power generation devices, and comprises a main frame and a photovoltaic plate, wherein the left end of the main frame is fixedly connected with a first support, the top of the first support is hinged with a first connecting shaft, the right end of the main frame is fixedly connected with a second support, the second support is provided with an arc hole, the second support is positioned in the arc hole and is glidingly connected with a second connecting shaft, the first connecting shaft and the second connecting shaft are both provided with fixing mechanisms, the fixing mechanisms are connected with the photovoltaic plate through bolts, a fixing rod is fixedly connected between the first connecting shaft and the second connecting shaft, the photovoltaic plate can be installed on a rotating frame, one end of the rotating frame is enabled to slide on a support provided with a multi-stage limiting device, the photovoltaic plate can be conveniently installed, disassembled and maintained, and the photovoltaic plate can be adjusted and installed at any time, effectively enlarged photovoltaic support application range.

Description

Photovoltaic support easy to assemble and adjust

Technical Field

The utility model relates to a photovoltaic power generation technical field, more specifically say, relate to a photovoltaic support easy to assemble and adjust.

Background

Solar energy is inexhaustible renewable energy which is obtained by human beings, along with the attention of society to energy conservation and emission reduction, at present, the traditional energy sources have the defects of limited non-reutilization, high pollution, low utilization rate, ecological damage and high cost, and new energy represented by solar energy and wind energy can just make up the defects, more and more countries take the new energy sources as important modes of sustainable development, and the solar energy has the advantages of sufficient cleanness, absolute safety, relative universality, resource sufficiency, potential economy and the like, has an important position in a long-term energy strategy, and becomes indispensable in the process of converting the solar energy into the electric energy.

The photovoltaic power generation system is characterized in that photovoltaic modules are arranged on a photovoltaic support and are arranged in a preset array, then the photovoltaic modules are connected to form the photovoltaic power generation system, the inclination angle of the photovoltaic support is usually optimized to improve the solar radiation utilization rate, so that the power generation efficiency of the photovoltaic power generation system is improved, the application of solar products is more and more extensive, the application of photovoltaic power generation is more common, most of the solar photovoltaic supports commonly used at present adopt fixed supports, the fixed supports are mostly jointed in a welding mode, some photovoltaic modules are large and heavy, the installation and debugging are usually carried out by workers, the whole period is longer, the disassembly is complex, great inconvenience is brought to the assembly and maintenance of the photovoltaic modules, the production cost is overhigh, the installation efficiency is low, in addition, the traditional photovoltaic supports cannot adjust the light receiving angle of a photovoltaic panel during the installation, and further the adjustment efficiency of the photovoltaic panel is reduced, therefore, a photovoltaic bracket convenient to install and adjust is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a photovoltaic support that easy to assemble was adjusted, it can realize through installing the photovoltaic board on the rotating turret to make rotating turret one end slide on the support that is equipped with multistage stop device, not only conveniently install, dismantle and maintain the photovoltaic board, still can carry out the regulation installation of photic angle to the photovoltaic board at any time, effectively enlarged photovoltaic support application range.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A photovoltaic support convenient to install and adjust comprises a main frame and a photovoltaic plate, wherein a first support is fixedly connected to the left end of the main frame, a first connecting shaft is hinged to the top of the first support, a second support is fixedly connected to the right end of the main frame, an arc-shaped hole is formed in the second support, a second connecting shaft is slidably connected to the second support in the arc-shaped hole, fixing mechanisms are mounted on the first connecting shaft and the second connecting shaft respectively, the fixing mechanisms are connected with the photovoltaic plate through bolts, a fixing rod is fixedly connected between the first connecting shaft and the second connecting shaft, a plurality of limiting mechanisms are mounted in the second support, threaded through holes are formed in the right side wall of the second support above the limiting mechanisms, the second connecting shaft is connected with the second support through bolts, and a buffer mechanism is mounted at the bottom of the arc-shaped hole on the second support, the photovoltaic panel installation device has the advantages that the photovoltaic panel can be installed on the rotating frame, one end of the rotating frame slides on the support provided with the multi-stage limiting devices, the photovoltaic panel is convenient to install, disassemble and maintain, the adjustment and installation of the light receiving angle of the photovoltaic panel can be carried out at any time, and the application range of the photovoltaic support is effectively enlarged.

Further: the fixing mechanism comprises a connecting block and a limiting plate, the connecting blocks are symmetrically arranged on the second connecting shaft and the side wall of the fixing mechanism, the limiting plate is fixedly connected to the upper end of the connecting block, the photovoltaic panel and the connecting block can be effectively fixed, and the stability of interconnection is improved.

Further: the second support is located the arc downthehole slide rail of having seted up, the second connecting axle runs through the arc downthehole setting, fixedly connected with and slide rail assorted slider on the second connecting axle lateral wall can make the second connecting axle keep the horizontality in the arc downthehole slip from top to bottom, effectively improves the gliding stability of second connecting axle in the arc downthehole.

Further: stop gear includes fixture block and bayonet lock, the second support is located the downthehole draw-in groove of having seted up of arc, the second support is located that the draw-in groove articulates there is the fixture block, the second support is located the draw-in groove and has seted up the through-hole, the second support is located the through-hole and has seted up the spout, the second support is located the spout install with fixture block matched with bayonet lock, and the bayonet lock is located the spout and the first compression spring of fixedly connected with between the second support, and one-way limit structure can carry out multistage spacing to the second connecting axle, prevents that the second connecting axle from leading to causing the damage to the photovoltaic board because of unexpected landing, can play the effect that the location supported when the staff installs second support and second connecting axle simultaneously, has effectively increased the connection stability of second connecting axle.

Further: the utility model discloses a photovoltaic panel, including first support, second support left end outer wall are located a plurality of extension spring of stop gear department fixedly connected with, and are a plurality of extension spring left end fixedly connected with is same pull rod, the left end runs through the pull rod setting, and left end fixedly connected with head of a nail, makes things convenient for the user of service to once only pull open whole stop device, also can single-stage adjustment photovoltaic panel's installation angle, has effectively promoted the convenience and the security of installation and regulation.

Further: buffer gear includes backup pad and second compression spring, the second support is located the first fixed plate of arc hole downside fixedly connected with, first fixed plate sliding connection has the first slide bar of two vertical settings, two the same backup pad of first slide bar upper end fixedly connected with, two the same second fixed plate of first slide bar lower extreme fixedly connected with, fixedly connected with cup joints the second compression spring on first slide bar between backup pad and the first fixed plate, can avoid the photovoltaic board to take place the collision damage that the gliding caused because of user's misoperation or equipment damage, forms multistage protection with stop gear mutually supports simultaneously, effectively promotes equipment's security performance, and the protection property is not lost.

Further: first fixed plate lower extreme center department fixedly connected with second slide bar of vertical setting, the second slide bar runs through the second fixed plate and slides the setting, can make the backup pad keep the slip of vertical direction, has effectively avoided the backup pad to cause because of controlling the unbalanced stress to take place the card between first slide bar and the first fixed plate to pause to aggravate wearing and tearing and then reduce buffering effect.

Further: fixedly connected with bracing piece between second support top and the body frame, and the perpendicular body frame setting of bracing piece can play the effect of fixed stay to the second support, has effectively improved holistic steadiness.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) the photovoltaic panel installation device has the advantages that the photovoltaic panel can be installed on the rotating frame, one end of the rotating frame slides on the support provided with the multi-stage limiting devices, the photovoltaic panel is convenient to install, disassemble and maintain, the adjustment and installation of the light receiving angle of the photovoltaic panel can be carried out at any time, and the application range of the photovoltaic support is effectively enlarged.

(2) The fixing mechanism comprises a connecting block and a limiting plate, the connecting blocks are symmetrically arranged on the second connecting shaft and the side wall of the fixing mechanism, the limiting plate is fixedly connected to the upper end of the connecting block, the photovoltaic panel and the connecting block can be effectively fixed, and the stability of interconnection is improved.

(3) The second support is located the downthehole slide rail of having seted up of arc, and the second connecting axle runs through the setting of arc, fixedly connected with and slide rail assorted slider on the second connecting axle lateral wall, can make the second connecting axle slide from top to bottom at the downthehole horizontality that keeps of arc, effectively improves the gliding stability of second connecting axle in the arc.

(4) Stop gear includes fixture block and bayonet lock, the second support is located the downthehole draw-in groove of having seted up of arc, the second support is located that the draw-in groove articulates there is the fixture block, the second support is located the draw-in groove and has seted up the through-hole, the second support is located the through-hole and has seted up the spout, the second support is located the spout install with fixture block matched with bayonet lock, and the bayonet lock is located the spout and the first compression spring of fixedly connected with between the second support, one-way limit structure can carry out multistage spacing to the second connecting axle, prevent that the second connecting axle from leading to causing the damage to the photovoltaic board because of unexpected landing, can play the effect that the location supported when the staff installs second support and second connecting axle simultaneously, the connection stability of second connecting axle has effectively been increased.

(5) The outer wall of the left end of the second support is located at the limiting mechanism and fixedly connected with a plurality of extension springs, the left ends of the extension springs are fixedly connected with the same pull rod, the left end of the extension springs runs through the pull rod, the nail cap is fixedly connected with the left end of the extension springs, a user can pull open all limiting devices conveniently at one time, the installation angle of the photovoltaic panel can be adjusted at a single level, and installation and adjustment convenience and safety are effectively improved.

(6) Buffer gear includes backup pad and second compression spring, the second support is located the first fixed plate of arc hole downside fixedly connected with, first fixed plate sliding connection has the first slide bar of two vertical settings, the same backup pad of two first slide bar upper end fixedly connected with, the same second fixed plate of two first slide bar lower extreme fixedly connected with, fixedly connected with cup joints the second compression spring on first slide bar between backup pad and the first fixed plate, can avoid the photovoltaic board to take place the collision damage that the gliding caused of falling because of user's misoperation or equipment damage, form multistage protection with stop gear mutually supports simultaneously, effectively promote the security performance of equipment, protect property not lost.

(7) The second slide bar of the vertical setting of first fixed plate lower extreme center department fixedly connected with, the second slide bar runs through the second fixed plate and slides the setting, can make the backup pad keep the slip of vertical direction, has effectively avoided the backup pad to cause the card to pause between first slide bar and the first fixed plate because of controlling the unbalanced stress and aggravate wearing and tearing and then reduce buffering effect.

(8) Fixedly connected with bracing piece between second support top and the body frame, and the perpendicular body frame setting of bracing piece can play the effect of fixed stay to the second support, has effectively improved holistic steadiness.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic perspective view of the fixing mechanism of the present invention;

fig. 3 is a cross-sectional view of the arc-shaped bracket of the present invention;

fig. 4 is a schematic structural view of the limiting mechanism of the present invention;

fig. 5 is a schematic structural view of the buffering mechanism of the present invention;

fig. 6 is a schematic view of the horizontal installation of the photovoltaic panel of the present invention;

fig. 7 is the utility model discloses a photovoltaic board maximum inclination installs the schematic diagram.

The reference numbers in the figures illustrate:

the main frame 1, the first support 2, the second support 3, the first connecting axle 4, the second connecting

axle

5, 6 fixed establishment, 7 stop gear, 701 draw-in groove, 702 fixture block, 703 bayonet lock, 704 first compression spring, 705 spout, 8 extension spring, 9 buffer gear, 901 first fixed plate, 902 backup pad, 903 first slide bar, 904 second compression spring, 905 second fixed plate, 906 second slide bar, 10 dead lever, 11 arc hole, 12 slide rail, 13 sliders, 14 bracing pieces, 15 connecting blocks, 16 limiting plates, 17 photovoltaic board, 18 pull rod.

Detailed Description

The drawings in the embodiments of the present invention will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the present invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all belong to the protection scope of the utility model.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-7, a photovoltaic support convenient for installation and adjustment comprises a main frame 1 and a photovoltaic plate 17, wherein a first support 2 is fixedly connected to the left end of the main frame 1, a first connecting shaft 4 is hinged to the top of the first support 2, a second support 3 is fixedly connected to the right end of the main frame 1, an arc hole 11 is formed in the second support 3, the second support 3 is positioned in the arc hole 11 and is slidably connected with a second connecting shaft 5, fixing mechanisms 6 are respectively installed on the first connecting shaft 4 and the second connecting shaft 5, the fixing mechanisms 6 are connected with the photovoltaic plate 17 through bolts, a fixing rod 10 is fixedly connected between the first connecting shaft 4 and the second connecting shaft 5, a plurality of limiting mechanisms 7 are installed in the second support 3, the right side wall of the second support 3 is positioned above the plurality of limiting mechanisms 7 and is provided with threaded through holes, the second connecting shaft 5 is connected with the second support 3 through bolts, a buffer mechanism 9 is installed at the bottom of the arc hole 11 of the second support 3, the photovoltaic panel installation device has the advantages that the photovoltaic panel can be installed on the rotating frame, one end of the rotating frame slides on the support provided with the multi-stage limiting devices, the photovoltaic panel is convenient to install, disassemble and maintain, the adjustment and installation of the light receiving angle of the photovoltaic panel can be carried out at any time, and the application range of the photovoltaic support is effectively enlarged.

Referring to fig. 1-2, the fixing mechanism 6 includes a connecting block 15 and a limiting plate 16, the connecting blocks 15 are symmetrically and fixedly connected to the sidewalls of the second connecting shaft 5 and the fixing mechanism 6, and the limiting plate 16 is fixedly connected to the upper end of the connecting block 15, so that the photovoltaic panel 17 and the connecting block 15 can be effectively fixed, and the stability of interconnection is improved.

Referring to fig. 1 and 3, the second bracket 3 is provided with a slide rail 12 in the arc hole 11, the second connecting shaft 5 is disposed through the arc hole 11, and a slide block 13 matched with the slide rail 12 is fixedly connected to a side wall of the second connecting shaft 5, so that the second connecting shaft 5 can slide up and down in the arc hole 11 in a horizontal state, and the stability of the second connecting shaft 5 sliding in the arc hole 11 is effectively improved.

Referring to fig. 1 and 4, the limiting mechanism 7 includes a clamping block 702 and a clamping pin 703, a clamping groove 701 is formed in the arc-shaped hole 11 of the second bracket 3, the second bracket 3 is hinged to the clamping groove 701 and is provided with the clamping block 702, a through hole is formed in the clamping groove 701 of the second bracket 3, a sliding groove 705 is formed in the through hole of the second bracket 3, the clamping pin 703 matched with the clamping block 702 is installed in the sliding groove 705 of the second bracket 3, and a first compression spring 704 is fixedly connected between the clamping pin 703 and the second bracket 3 in the sliding groove 705, the one-way limiting structure can limit the second connecting shaft 5 in multiple stages, so as to prevent the second connecting shaft 5 from damaging the photovoltaic panel 17 due to accidental sliding, and meanwhile, when a worker installs the second bracket 3 and the second connecting shaft 5, the positioning and supporting functions can be performed, and the connection stability of the second connecting shaft 5 is effectively increased.

Referring to fig. 4, the outer wall of the left end of the second support 3 is fixedly connected with a plurality of extension springs 8 at the position of the limiting mechanism 7, the left ends of the extension springs 8 are fixedly connected with a same pull rod 18, the left end of the bayonet 703 penetrates through the pull rod 18, and the left end of the bayonet 703 is fixedly connected with a nut, so that a user can conveniently pull open all limiting devices at one time, the installation angle of the photovoltaic panel 17 can be adjusted at a single stage, and the convenience and the safety of installation and adjustment are effectively improved.

Please refer to fig. 1 and 5, the buffering mechanism 9 includes a supporting plate 902 and a second compression spring 904, the second bracket 3 is located at the lower side of the arc hole 11 and is fixedly connected with a first fixing plate 901, the first fixing plate 901 is slidably connected with two vertically arranged first sliding rods 903, the upper ends of the two first sliding rods 903 are fixedly connected with a same supporting plate 902, the lower ends of the two first sliding rods 903 are fixedly connected with a same second fixing plate 905, the second compression spring 904 sleeved on the first sliding rods 903 is fixedly connected between the supporting plate 902 and the first fixing plate 901, so as to avoid the collision damage caused by the falling down of the photovoltaic panel 17 due to improper operation of users or damage of equipment, and meanwhile, the photovoltaic panel is mutually matched with the limiting mechanism 7 to form multi-stage protection, thereby effectively improving the safety performance of the equipment and protecting property from loss.

Referring to fig. 6, a vertically arranged second sliding rod 906 is fixedly connected to the center of the lower end of the first fixing plate 901, and the second sliding rod 906 is slidably arranged through the second fixing plate 905, so that the supporting plate 902 can keep sliding in the vertical direction, and the situation that the clamping and aggravating abrasion between the first sliding rod 903 and the first fixing plate 901 are caused by the unbalanced left and right stress of the supporting plate 902 is effectively avoided, and the buffering effect is reduced.

Referring to fig. 1, a support rod 14 is fixedly connected between the top end of the second support 3 and the main frame 1, and the support rod 14 is perpendicular to the main frame 1, so that the second support 3 can be fixedly supported, and the overall stability is effectively improved.

The working principle is as follows: when the photovoltaic panel 17 is installed, the photovoltaic panel 17 is installed on two fixing mechanisms 6 and fixed through bolts, then the right second connecting shaft 5 is lifted and slides upwards along the second bracket 3, when the second connecting shaft 5 passes through the limiting mechanism 7, the fixture block 702 is shifted 90 degrees anticlockwise, the fixture block 702 rotates anticlockwise, the contact of the fixture block 702 can eject the clamp pin 703, the clamp pin 703 is ejected into the clamp groove 701 under the elastic action of the first compression spring 704, at the moment, the fixture block 702 rotates clockwise and can be clamped by the clamp pin 703, the second connecting shaft 5 is lifted to a preset limiting mechanism 7 to be clamped, at the moment, the second connecting shaft 5 and the second bracket 3 are connected and fixed through bolts to finish installation, when the photovoltaic panel 17 needs to be angularly adjusted, the second bracket 3 and the second connecting shaft 5 are detached, the clamp pin 703 is pulled to release limiting, so that the second connecting shaft 5 can slide to the next stage for installation, the angle mounting positions of four gears are arranged on the second support 3, the photovoltaic panel 17 can be mounted by selecting proper angle adjustment, when the photovoltaic panel 17 needs to be detached, the pull rod 18 can be pulled to pull out all the clamping pins 703, the clamping blocks 702 can rotate clockwise, the bolts connecting the second connecting shaft 5 and the second support 3 are detached and slide to the bottom of the second support 3, the bolts connecting the photovoltaic panel 17 and the fixing mechanism 6 are detached, and the photovoltaic panel 17 is horizontally taken out to complete detachment.

The above; is only a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; according to the technical scheme of the utility model and the improvement conception, equivalent substitution or change is carried out; are all covered by the protection scope of the utility model.

Claims

1. The utility model provides a photovoltaic support easy to assemble and adjust, includes body frame (1) and photovoltaic board (17), its characterized in that: the solar photovoltaic frame is characterized in that a first support (2) is fixedly connected to the left end of the main frame (1), a first connecting shaft (4) is hinged to the top of the first support (2), a second support (3) is fixedly connected to the right end of the main frame (1), an arc-shaped hole (11) is formed in the second support (3), a second connecting shaft (5) is slidably connected to the second support (3) in the arc-shaped hole (11), fixing mechanisms (6) are respectively installed on the first connecting shaft (4) and the second connecting shaft (5), the fixing mechanisms (6) are connected with a photovoltaic plate (17) through bolts, a fixing rod (10) is fixedly connected between the first connecting shaft (4) and the second connecting shaft (5), a plurality of limiting mechanisms (7) are installed inside the second support (3), and threaded through holes are formed in the upper side of the second support (3) and are located on the plurality of limiting mechanisms (7), the second connecting shaft (5) is connected with the second support (3) through a bolt, and the second support (3) is located at the bottom of the arc-shaped hole (11) and is provided with a buffer mechanism (9).

2. The photovoltaic bracket convenient to mount and adjust as claimed in claim 1, wherein: fixing mechanism (6) are including connecting block (15) and limiting plate (16), connecting block (15) that equal fixedly connected with symmetry set up on second connecting axle (5) and fixing mechanism (6) lateral wall, connecting block (15) upper end fixedly connected with limiting plate (16).

3. The photovoltaic bracket convenient to mount and adjust as claimed in claim 1, wherein: the second support (3) is provided with a sliding rail (12) in the arc-shaped hole (11), the second connecting shaft (5) penetrates through the arc-shaped hole (11), and a sliding block (13) matched with the sliding rail (12) is fixedly connected to the side wall of the second connecting shaft (5).

4. The photovoltaic bracket convenient to mount and adjust as claimed in claim 1, wherein: the limiting mechanism (7) comprises a clamping block (702) and a clamping pin (703), the second support (3) is located in the arc-shaped hole (11) and is provided with a clamping groove (701), the second support (3) is located in the clamping groove (701) and is hinged with the clamping block (702), the second support (3) is located in the clamping groove (701) and is provided with a through hole, the second support (3) is located in the through hole and is provided with a sliding groove (705), the second support (3) is located in the sliding groove (705) and is provided with the clamping pin (703) matched with the clamping block (702), and the clamping pin (703) is located in the sliding groove (705) and is fixedly connected with a first compression spring (704) between the second support (3).

5. The photovoltaic bracket convenient to mount and adjust as claimed in claim 4, wherein: the outer wall of the left end of the second support (3) is located at a limiting mechanism (7) and fixedly connected with a plurality of extension springs (8) and a plurality of extension springs (8), the left end of each extension spring (8) is fixedly connected with a same pull rod (18), the left end of the clamping pin (703) penetrates through the arrangement of the pull rods (18), and the left end of the clamping pin (703) is fixedly connected with a nail cap.

6. The photovoltaic bracket convenient to mount and adjust as claimed in claim 1, wherein: buffer gear (9) include backup pad (902) and second compression spring (904), second support (3) are located arc hole (11) downside fixedly connected with first fixed plate (901), first fixed plate (901) sliding connection has first slide bar (903) of two vertical settings, two same backup pad (902) of first slide bar (903) upper end fixedly connected with, two same second fixed plate (905) of first slide bar (903) lower extreme fixedly connected with, fixedly connected with cup joints second compression spring (904) on first slide bar (903) between backup pad (902) and first fixed plate (901).

7. The photovoltaic bracket convenient to mount and adjust as claimed in claim 6, wherein: the center of the lower end of the first fixing plate (901) is fixedly connected with a second sliding rod (906) which is vertically arranged, and the second sliding rod (906) penetrates through a second fixing plate (905) to be arranged in a sliding mode.

8. The photovoltaic bracket convenient to mount and adjust as claimed in claim 1, wherein: and a support rod (14) is fixedly connected between the top end of the second support (3) and the main frame (1), and the support rod (14) is vertical to the main frame (1).