CN217240644U

CN217240644U - Power system photovoltaic power generation board mounting bracket

Info

Publication number: CN217240644U
Application number: CN202220536039.5U
Authority: CN
Inventors: 李璞晗; 魏军强
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-08-19
Anticipated expiration: 2032-03-10

Abstract

The application discloses electric power system photovoltaic power generation board mounting bracket, including backup pad, bracing piece one, rotating-structure, bearing structure, fixed knot construct and screw up the structure, two bracing pieces of top lateral wall fixed connection of backup pad one, bracing piece one is through rotating-structure joint support frame, be provided with bearing structure on the bracing piece one, two mounts of fixed connection on the lateral wall at the front and the back of support frame. This application utilizes bolt two and fixed sleeve to fix the photovoltaic power generation board main part on the support frame, the manual fixed plate that promotes, the joint pad supports the lateral wall of photovoltaic power generation board main part, the joint pole supports the fixed plate, the photovoltaic power generation board main part is caught by the joint pad from both sides joint, be convenient for firmly fix the photovoltaic power generation board main part on the mounting bracket, this application tie-over motor rotates and drives the rotation of photovoltaic power generation board main part, be convenient for rotate the photovoltaic power generation board, make the photovoltaic power generation board can rotate along with the sun, abundant absorbed light energy.

Description

Power system photovoltaic power generation board mounting bracket

Technical Field

The application relates to the field of photovoltaic power generation panels, in particular to a mounting rack for a photovoltaic power generation panel of an electric power system.

Background

Photovoltaic power generation is a technology of directly converting light energy into electric energy by using the photovoltaic effect of a semiconductor interface. The solar energy power generation system mainly comprises a solar panel (assembly), a controller and an inverter, and the main components are electronic components. The solar cells are connected in series and then are packaged and protected to form a large-area solar cell module, and then the photovoltaic power generation device is formed by matching with components such as a power controller and the like.

When the photovoltaic power generation board is placed to the external world and carries out the photovoltaic special effect and respond, need install the photovoltaic power generation board at the mounting bracket usually, support the photovoltaic power generation board with the mounting bracket, in addition, traditional mounting bracket is fixed connection photovoltaic power generation board, and the photovoltaic power generation board can't rotate, but the sun is from east to west motion every day, and this makes the not abundant absorbed light energy of photovoltaic power generation board. Therefore, the power system photovoltaic power generation panel mounting frame is provided aiming at the problems.

Disclosure of Invention

The photovoltaic power generation board mounting frame is used for solving the problems that in the prior art, the photovoltaic power generation board cannot rotate due to the fact that the photovoltaic power generation board is mounted on the mounting frame, and light energy cannot be sufficiently absorbed.

According to an aspect of the application, an electric power system photovoltaic power generation board mounting bracket is provided, including backup pad, bracing piece one, rotating-structure, bearing structure, fixed knot structure and screwing up the structure, two bracing pieces of top lateral wall fixed connection of backup pad one, bracing piece one is through rotating-structure joint support frame, be provided with bearing structure on the bracing piece one, two mounts of fixed connection on the front of support frame and the lateral wall at the back, the support frame passes through two joint photovoltaic power generation board main parts of joint structure, be provided with fixed knot structure and joint structure one on the mount, the bottom of photovoltaic power generation board main part is provided with screws up the structure.

Furthermore, the supporting structure comprises a second supporting rod, a first rotating frame, a second rotating frame and a third supporting rod, the outer side wall of the top of the supporting plate is fixedly connected with the second supporting rod and the third supporting rod, the top of the second supporting rod is fixedly connected with the first rotating frame, the top of the third supporting rod is fixedly connected with the second rotating frame, and the first rotating frame and the other end of the second rotating frame are fixedly connected to the first supporting plate.

Furthermore, four support rods IV are fixedly connected to the outer side walls of the front surface and the back surface of the fixing frame, and the support rods IV are slidably connected to the first rotating frame and the second rotating frame.

Further, revolution mechanic is including rotating motor, dwang and connecting plate, the dwang rotates to be connected between bracing piece one, fixed connection rotates the motor on the lateral wall of bracing piece one, the rotation end fixed connection dwang that rotates the motor, fixed connection connecting plate on the dwang, the other end fixed connection of connecting plate is in the bottom of support frame.

Furthermore, four circular through grooves are formed in the side wall of the bottom of the supporting frame, and eight threaded holes are formed in the fixing frame.

Further, the tightening structure comprises a fixing sleeve and a second bolt, the fixing sleeve is fixedly connected to the outer side wall of the bottom of the photovoltaic power generation panel main body, and the second bolt is connected in the internal thread of the fixing sleeve.

Further, joint structure two is including joint pad, joint board, slide bar, spring and fixed plate, slide bar sliding connection is on the lateral wall of support frame, the one end fixed connection joint board of slide bar, fixed connection joint pad on the lateral wall of joint board, the other end fixed connection fixed plate of slide bar, fixed connection spring between fixed plate and the support frame, the slide bar is located the inside of spring.

Furthermore, the clamping pad is made of rubber.

Further, joint structure one includes joint pole and joint groove, the joint groove is seted up on the lateral wall of mount, joint inslot fixed connection joint pole, the joint pole is "worker" type structure.

Furthermore, the fixing structure comprises a fixing rod and a first bolt, the fixing rod is in threaded connection with the first bolt, and the first bolt is matched with the threaded hole.

Through the above-mentioned embodiment of this application, adopted rotation structure, bearing structure, screwed up structure, joint structure one and joint structure two, solved the fixed and photovoltaic power generation board of photovoltaic power generation board on the mounting bracket and can't rotate, can not abundant absorbed light ability problem, gained be convenient for with firm the fixing on the mounting bracket of photovoltaic power generation board main part with be convenient for rotate photovoltaic power generation board, make photovoltaic power generation board can rotate along with the sun, abundant absorbed light ability effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic overall perspective view of an embodiment of the present application;

FIG. 2 is a schematic diagram of the overall internal structure of an embodiment of the present application;

FIG. 3 is a schematic diagram of the overall side view internal structure of an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 1A according to an embodiment of the present disclosure;

FIG. 5 is an enlarged view of a portion of the structure shown in FIG. 2B according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of a partial enlarged structure at C in fig. 3 according to an embodiment of the present application.

In the figure: 1. a support plate; 2. a first supporting rod; 3. a rotating structure; 301. rotating the motor; 302. rotating the rod; 303. a connecting plate; 4. a support structure; 401. a second supporting rod; 402. a first rotating frame; 403. a second rotating frame; 404. a third supporting rod; 5. a support frame; 6. a fixed mount; 7. a photovoltaic power generation panel main body; 8. a fourth supporting rod; 9. a fixed structure; 901. fixing the rod; 902. a first bolt; 10. a circular through groove; 11. screwing the structure; 1101. fixing the sleeve; 1102. a second bolt; 12. a first clamping structure; 1201. a clamping and connecting rod; 1202. a clamping groove; 13. a second clamping structure; 1301. clamping the pad; 1302. a clamping plate; 1303. a slide bar; 1304. a spring; 1305. a fixing plate; 14. a threaded bore.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The mounting bracket in this embodiment is applicable to the installation of photovoltaic power generation board, for example, provides following new forms of energy photovoltaic power generation board in this embodiment, and the mounting bracket in this embodiment can be used to carry out the installation to following new forms of energy photovoltaic power generation board.

The utility model provides a new forms of energy photovoltaic power generation board, includes the frame, the embedded photovoltaic board that is provided with in frame intermediate position, both ends fixed mounting has the fixed block about the frame, the inside fixed iron prop that is provided with of fixed block, the coil has been cup jointed on the iron prop surface, the frame both sides slide and are provided with two sets of sliders, slider top fixed mounting connecting block, fixed mounting has first cleaning board and second cleaning board between two parallel connecting block, first cleaning board and second cleaning board all are provided with the rubber scraper with the photovoltaic board contact surface, first cleaning board and second cleaning board outside fixed mounting have the iron plate.

The surface of both sides of the frame is provided with a sliding groove, and the sliding groove is matched with the sliding block.

And two ends inside the sliding chute are fixedly provided with a return spring, and one end of the return spring is fixedly connected with the sliding block.

And parallel switches are fixedly arranged on one sides of the first cleaning plate and the second cleaning plate which are adjacent to each other and one end inside the sliding groove.

The bottom of the connecting block is provided with an L-shaped lug in a sliding manner, and the outer side of the sliding block is provided with a groove matched with the L-shaped lug.

The top of the connecting block is rotatably provided with a fastening bolt, and the L-shaped lug and the sliding block are both provided with threaded holes matched with the fastening bolt.

In the work, the coil is electrified to enable the iron column to generate magnetism, so that the iron blocks on the surfaces of the first cleaning plate and the second cleaning plate are attracted, the first cleaning plate and the second cleaning plate are driven to move towards two sides, the first cleaning plate and the second cleaning plate are enabled to clean the photovoltaic plate, when the sliding block moves to the top of the sliding groove, the sliding block can press the switch to enable the coil to be powered off, the sliding block can be reset by the reset spring under the condition of no attraction, the first cleaning plate and the second cleaning plate are driven to reset, when the first cleaning plate and the second cleaning plate are closed, the switch can be extruded to energize the coil, the first cleaning plate and the second cleaning plate are enabled to be opened again, and the operation is repeated in a circulating mode to achieve automatic cleaning of the photovoltaic plate;

when changing first cleaning plate and second cleaning plate, through reversal fastening bolt for fastening bolt extracts from the screw hole, then extracts L type lug from the recess, can take off first cleaning plate and second cleaning plate like this, and it is inside inserting the recess with L type lug after changing new, then corotation fastening bolt can use, the effectual step of simplifying the dismouting like this, the effectual work efficiency that has improved.

Of course, the embodiment can also be used for installing photovoltaic power generation panels with other structures. Here, description is not repeated, and the following describes the mounting bracket according to the embodiment of the present application.

The new energy photovoltaic power generation board is a Chinese utility model patent (application number: CN 202022864726.3). Wherein, can install the photovoltaic power generation board in the above-mentioned patent with the mounting bracket in this application.

Referring to fig. 1-6, an electric power system photovoltaic power generation panel mounting bracket includes a support plate 1, a first support rod 2, a rotation structure 3, a support structure 4, a fixing structure 9 and a tightening structure 11, the first support rod 2 is fixedly connected to the outer side wall of the top of the support plate 1, the first support rod 2 is connected to a support frame 5 through the rotation structure 3, the support structure 4 is arranged on the first support rod 2, two fixing frames 6 are fixedly connected to the outer side walls of the front and back of the support frame 5, the support frame 5 is clamped to a photovoltaic power generation panel main body 7 through a second clamping structure 13, the fixing frame 6 is provided with the fixing structure 9 and the first clamping structure 12, and the tightening structure 11 is arranged at the bottom of the photovoltaic power generation panel main body 7.

Utilize screwing up structure 11, joint structure one 12 and joint structure two 13 to be convenient for fix photovoltaic power generation board main part 7 firmly on the mounting bracket, utilize revolution mechanic 3 and bearing structure 4 to drive photovoltaic power generation board main part 7 and rotate, be convenient for rotate photovoltaic power generation board, make photovoltaic power generation board can rotate along with the sun, abundant absorbed light energy.

The supporting structure 4 comprises a second supporting rod 401, a first rotating frame 402, a second rotating frame 403 and a third supporting rod 404, the outer side wall of the top of the supporting plate 1 is fixedly connected with the second supporting rod 401 and the third supporting rod 404, the top of the second supporting rod 401 is fixedly connected with the first rotating frame 402, the top of the third supporting rod 404 is fixedly connected with the second rotating frame 403, the other ends of the first rotating frame 402 and the second rotating frame 403 are fixedly connected to the first supporting plate 1, and the first rotating frame 402 and the second rotating frame 403 support the supporting frame 5 while not influencing the rotation of the supporting frame 5.

The outer side walls of the front surface and the back surface of the fixed frame 6 are fixedly connected with four supporting rods four 8, the supporting rods four 8 are slidably connected in the first rotating frame 402 and the second rotating frame 403, and the supporting rods four 8 can slide along with the rotation of the supporting frame 5.

Rotating-structure 3 is including rotating motor 301, dwang 302 and connecting plate 303, dwang 302 rotates to be connected between bracing piece one 2, fixed connection rotates motor 301 on the lateral wall of bracing piece one 2, the rotation end fixed connection dwang 302 that rotates motor 301, fixed connection connecting plate 303 on the dwang 302, the other end fixed connection of connecting plate 303 is in the bottom of support frame 5, rotates motor 301 and rotates and drive dwang 302 and rotate, and dwang 302 drives connecting plate 303 and rotates, and connecting plate 303 drives support frame 5 and rotates.

Four circular through grooves 10 are formed in the side wall of the bottom of the support frame 5, eight threaded holes 14 are formed in the fixing frame 6, and the circular through grooves 10 can facilitate the fixing sleeve 1101 to penetrate through.

The tightening structure 11 comprises a fixing sleeve 1101 and a second bolt 1102, the fixing sleeve 1101 is fixedly connected to the outer side wall of the bottom of the photovoltaic power generation panel main body 7, the second bolt 1102 is connected in the internal thread of the fixing sleeve 1101, and the photovoltaic power generation panel main body 7 can be fixed on the support frame 5 through the second bolt 1102 and the fixing sleeve 1101.

The second clamping structure 13 comprises a clamping pad 1301, a clamping plate 1302, a sliding rod 1303, a spring 1304 and a fixing plate 1305, the sliding rod 1303 is connected to the side wall of the support frame 5 in a sliding mode, one end of the sliding rod 1303 is fixedly connected to the clamping plate 1302, the clamping pad 1301 is fixedly connected to the outer side wall of the clamping plate 1302, the other end of the sliding rod 1303 is fixedly connected to the fixing plate 1305, the fixing plate 1305 is fixedly connected to the support frame 5, the sliding rod 1303 is located inside the spring 1304, the fixing plate 1305 is pushed manually, the sliding rod 1303 slides, the spring 1304 is compressed, and the sliding rod 1303 pushes the clamping plate 1302 and the clamping pad 1301 to move, so that the clamping pad 1301 is abutted against the side wall of the photovoltaic power generation board main body 7.

The clamping pad 1301 is made of rubber, and the clamping pad 1301 can simply protect two side edges of the photovoltaic power generation board.

The first clamping structure 12 comprises a clamping rod 1201 and a clamping groove 1202, the clamping groove 1202 is formed in the side wall of the fixing frame 6, the clamping rod 1201 is fixedly connected in the clamping groove 1202, the clamping rod 1201 is of an I-shaped structure, the clamping rod 1201 abuts against the fixing plate 1305, and the spring 1304 is prevented from pushing the fixing plate 1305 to rebound to the original position.

The fixing structure 9 comprises a fixing rod 901 and a first bolt 902, the fixing rod 901 is in threaded connection with the first bolt 902, the first bolt 902 is matched with the threaded hole 14, the first bolt 902 is in threaded connection with the threaded hole 14, and the fixing rod 901 is used for blocking the clamping rod 1201.

When the utility model is used, electrical components appearing in the application are externally connected with a power supply and a control switch when in use, the photovoltaic power generation board main body 7 is placed on the support frame 5, the fixing sleeve 1101 on the photovoltaic power generation board main body 7 is inserted into the circular through groove 10, the bolt II 1102 is connected into the fixing sleeve 1101 by screw threads, the photovoltaic power generation board main body 7 is fixed on the support frame 5 by the bolt II 1102 and the fixing sleeve 1101, then the fixing plate 1305 is manually pushed, the sliding rod 1303 slides, the spring 1304 is compressed, the sliding rod 1303 pushes the clamping plate 1302 and the clamping pad 1301 to move, the clamping pad 1301 is propped against the side wall of the photovoltaic power generation board main body 7, then the clamping rod 1201 is clamped in the clamping groove 1202, the clamping rod 1201 props against the fixing plate 1305, the spring 1304 is prevented from pushing the fixing plate 1305 to rebound to the original position, the bolt I902 is connected into the threaded hole 14 by screw threads, the clamping rod 901 is used for blocking the clamping rod, photovoltaic power generation board main part 7 is caught from both sides joint by joint pad 1301, be convenient for with the firm fixing of photovoltaic power generation board main part 7 on the mounting bracket, start rotation motor 301, rotation motor 301 rotates and drives dwang 302 and rotate, dwang 302 drives connecting plate 303 and rotates, connecting plate 303 drives support frame 5 and rotates, bracing piece four 8 slides along with support frame 5's rotation in a rotating turret 402 and two 403, rotating turret 402 and two 403 are when not influencing support frame 5 pivoted, provide the support to support frame 5, support frame 5 drives photovoltaic power generation board main part 7 and rotates, be convenient for rotate photovoltaic power generation board, make photovoltaic power generation board can rotate along with the sun, abundant absorbed light energy.

The application has the advantages that:

1. this application is rational in infrastructure, insert circular logical inslot with the fixed sleeve, with two threaded connection of bolt in the fixed sleeve, utilize two and fixed sleeve to fix the photovoltaic power generation board main part on the support frame, the manual fixed plate that promotes, the slide bar slides, the joint is filled up and is supported the lateral wall of photovoltaic power generation board main part, again with joint pole joint through the joint inslot, the joint pole supports the fixed plate, the photovoltaic power generation board main part is caught by the joint pad from both sides joint, be convenient for with firm the fixing on the mounting bracket of photovoltaic power generation board main part.

2. This application is rational in infrastructure, rotates the motor and rotates and drive the support frame and rotate, and bracing piece four slides in rotor frame one and rotor frame two along with the rotation of support frame, provides the support to the support frame, and the support frame drives the photovoltaic power generation board main part and rotates, is convenient for rotate photovoltaic power generation board, makes photovoltaic power generation board can rotate along with the sun, abundant absorbed light energy.

The rotating motor 301 adopts model TCH18-200-3S produced by Tai Chuang Motor Limited of Dongguan city and related matched power supply and circuit.

It is well within the skill of those in the art to implement, without undue experimentation, the present application is not directed to software and process improvements, as they relate to circuits and electronic components and modules.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides an electric power system photovoltaic power generation board mounting bracket which characterized in that: including backup pad (1), bracing piece (2), rotating-structure (3), bearing structure (4), fixed knot construct (9) and screw up structure (11), two bracing pieces (2) of top lateral wall fixed connection of backup pad (1), bracing piece (2) are through rotating-structure (3) joint support frame (5), be provided with bearing structure (4) on bracing piece (2), two mount (6) of fixed connection on the lateral wall at the front and the back of support frame (5), support frame (5) are through two (13) joint photovoltaic power generation board main part (7) of joint structure, be provided with fixed knot construct (9) and joint structure (12) on mount (6), the bottom of photovoltaic power generation board main part (7) is provided with screws up structure (11).

2. The power system photovoltaic panel mounting rack of claim 1, characterized in that: the support structure (4) comprises a second support rod (401), a first rotating frame (402), a second rotating frame (403) and a third support rod (404), the top outer side wall of the support plate (1) is fixedly connected with the second support rod (401) and the third support rod (404), the top of the second support rod (401) is fixedly connected with the first rotating frame (402), the top of the third support rod (404) is fixedly connected with the second rotating frame (403), and the other ends of the first rotating frame (402) and the second rotating frame (403) are fixedly connected with the first support plate (1).

3. The power system photovoltaic panel mounting rack of claim 1, characterized in that: and the outer side walls of the front surface and the back surface of the fixed frame (6) are fixedly connected with four supporting rods four (8), and the supporting rods four (8) are connected in the rotating frame I (402) and the rotating frame II (403) in a sliding manner.

4. A power system photovoltaic panel mount according to claim 1 wherein: rotating-structure (3) is including rotating motor (301), dwang (302) and connecting plate (303), dwang (302) rotates to be connected between bracing piece (2), fixed connection rotates motor (301) on the lateral wall of bracing piece (2), the rotation end fixed connection dwang (302) of rotating motor (301), fixed connection connecting plate (303) is gone up in dwang (302), the other end fixed connection of connecting plate (303) is in the bottom of support frame (5).

5. An electrical power system photovoltaic panel mount as claimed in claim 4 wherein: four circular through grooves (10) are formed in the side wall of the bottom of the support frame (5), and eight threaded holes (14) are formed in the fixing frame (6).

6. The power system photovoltaic panel mounting rack of claim 1, characterized in that: the tightening structure (11) comprises a fixing sleeve (1101) and a second bolt (1102), the fixing sleeve (1101) is fixedly connected to the outer side wall of the bottom of the photovoltaic power generation panel main body (7), and the second bolt (1102) is connected to the inner threads of the fixing sleeve (1101).

7. The power system photovoltaic panel mounting rack of claim 1, characterized in that: clamping structure two (13) are including clamping pad (1301), joint board (1302), slide bar (1303), spring (1304) and fixed plate (1305), slide bar (1303) sliding connection is on the lateral wall of support frame (5), one end fixed connection joint board (1302) of slide bar (1303), fixed connection clamping pad (1301) on the lateral wall of joint board (1302), the other end fixed connection fixed plate (1305) of slide bar (1303), fixed connection spring (1304) between fixed plate (1305) and support frame (5), slide bar (1303) are located the inside of spring (1304).

8. An electric power system photovoltaic power generation panel mounting bracket as claimed in claim 7, wherein: the clamping pad (1301) is made of rubber.

9. The power system photovoltaic panel mounting rack of claim 1, characterized in that: the clamping structure I (12) comprises a clamping rod (1201) and a clamping groove (1202), the clamping groove (1202) is formed in the side wall of the fixing frame (6), the clamping rod (1201) is fixedly connected in the clamping groove (1202), and the clamping rod (1201) is of an I-shaped structure.

10. The power system photovoltaic panel mounting rack of claim 1, characterized in that: the fixing structure (9) comprises a fixing rod (901) and a first bolt (902), the fixing rod (901) is in threaded connection with the first bolt (902), and the first bolt (902) is matched with the threaded hole (14).