Spliced bipv photovoltaic module with sliding adjustable mounting points

Abstract

The utility model discloses a splicing type bipv photovoltaic assembly capable of adjusting installation points in a sliding mode, which comprises a longitudinal sliding groove rod, a transverse sliding groove rod is arranged on the outer surface of the longitudinal sliding groove rod in an attached mode, and a slidable fixing mechanism is arranged among the longitudinal sliding groove rod, the transverse sliding groove rod and a photovoltaic panel set. Through the slidable fixing mechanism, when the photovoltaic panel group is fixed, fixing points can be flexibly adjusted, and the number of the fixing points can be conveniently increased. According to the spliced bipv photovoltaic module with the installation point capable of being adjusted in the sliding mode, before installation, a guide piece and a square bottom screw are assembled according to the size of a photovoltaic panel set, the photovoltaic panel set is assembled with a transverse sliding groove rod, the photovoltaic panel set is placed on the outer surfaces of a longitudinal sliding groove rod and the transverse sliding groove rod, the guide piece and the square bottom screw are placed in the longitudinal sliding groove rod, and the transverse sliding groove rod is placed in the longitudinal sliding groove rod; the position of the square bottom screw is moved and adjusted to a point required to be fixed, and the nut is tightened to press the clamping rubber sheet to the photovoltaic panel group for fixation, so that the fixing position of the photovoltaic panel group is flexibly adjusted, and the fixing points on the side edge of the photovoltaic panel group can be conveniently added.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a spliced ​​BIPV photovoltaic component with sliding adjustable mounting points. Background Art

[0002] As people pay more and more attention to the environment, they pay more and more attention to clean energy, and reduce the risks caused by multiple environmental hazards during power generation through clean and renewable energy. Traditional clean energy includes wind power generation, hydropower generation and photovoltaic power generation. Photovoltaic power generation requires the use of photovoltaic panels made of semiconductor materials, which directly convert light energy into electrical energy through sunlight. When installing photovoltaic panels, a frame is needed, but most of the existing frames are fixed by welding. Not only is the welding manufacturing time slow, but the form and shape are fixed and cannot be adjusted, resulting in only one type of photovoltaic panel being able to be installed. In addition, the points for fixing the photovoltaic panels are also fixed by welding, which is difficult to adjust and add. Utility Model Content

[0003] The purpose of the utility model is to provide a spliced ​​BIPV photovoltaic module with sliding adjustable mounting points to solve the problem in the above background technology that most mounting frames are welded and fixed, which is difficult to adjust when installing photovoltaic modules.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spliced ​​BIPV photovoltaic assembly with sliding adjustable mounting points, comprising a longitudinal slide rod, the outer surface of the longitudinal slide rod is fitted with a transverse slide rod, and the outer surfaces of the transverse slide rod and the longitudinal slide rod are both provided with grooves, and the longitudinal slide rod and the transverse slide rod are hollow in design, a photovoltaic panel group is provided on one side of the longitudinal slide rod and the transverse slide rod, and the photovoltaic panel group is respectively fitted with the outer surfaces of the longitudinal slide rod and the transverse slide rod, a sliding fixing mechanism is provided between the longitudinal slide rod, the transverse slide rod and the photovoltaic panel group, and the sliding fixing mechanism makes it possible to fix the photovoltaic panel group more flexibly and to conveniently add fixing points.

[0005] Preferably, the slidable fixing mechanism is a snap-on connector, which includes a threaded plug connector and a 360° upright locking member. The plug connector is provided with a fixing screw and a fixing frame, and the 360° upright locking member includes a tightening member and a snap-on member arranged in the fixing frame.

[0006] Preferably, the slidable fixing mechanism includes: a guide plate, a square bottom screw is installed through the outer surface of the guide plate, and the square bottom screw is engaged with the guide plate, the guide plate and the square bottom screw are respectively inserted into the grooves of the longitudinal slide rod and the transverse slide rod, and the outer surface of the square bottom screw is in contact with the outer surface of the photovoltaic panel group, a clamping rubber sheet is installed through the outer surface of the square bottom screw, and the clamping rubber sheet and the square bottom screw are slidably connected, a nut is threadedly installed on the outer surface of the square bottom screw, and the nut is in contact with the outer surface of the clamping rubber sheet, and the outer surface of the clamping rubber sheet is in contact with the outer surface of the photovoltaic panel group.

[0007] By adopting the above technical solution, the combination of the guide piece and the square bottom screw allows the guide piece and the square bottom screw to be disassembled for easy carrying. When fixing the photovoltaic panel group, it is only necessary to insert the guide piece and the square bottom screw into the longitudinal slide rod and the transverse slide rod. The number and position of the guide piece and the square bottom screw can be adjusted or increased to increase the fixing points of the photovoltaic panel group. Then the clamping rubber piece can be placed and the nut can be screwed in. The fixing points can be increased according to the size of the photovoltaic panel group, so that the photovoltaic panel group can be fixed more firmly and can be flexibly adjusted when fixed.

[0008] Preferably, the outer surface of the longitudinal slide rod is provided with a plug-in thread mechanism, which facilitates the longitudinal slide rod and the transverse slide rod to be fixedly installed on the outer surface of the object to be installed.

[0009] By adopting the above technical solution, the plug-in grounding pins can be inserted into the outer surface of the longitudinal slide rod, the position of the plug-in grounding pins can be easily adjusted, and the longitudinal slide rod can be fixed to the outer surface of the required installation position by the plug-in grounding pins.

[0010] Preferably, the plug-in threaded mechanism includes: a plug-in ground foot, which is inserted into the groove of the longitudinal slide rod, and the outer surface of the longitudinal slide rod is in contact with the outer surface of the plug-in ground foot, and the outer surface of the plug-in ground foot is provided with a mounting hole, and the outer surface of the plug-in ground foot is threadedly installed with a set screw, and the outer surface of the set screw is in contact with the outer surface of the longitudinal slide rod.

[0011] By adopting the above technical solution, the number of inserted grounding pins can be adjusted according to the length of the longitudinal slide rod. After adjusting the position of the plug-in grounding pins, the plug-in grounding pins can be fixed to the outer surface of the longitudinal slide rod and the transverse slide rod by tightening screws. The number of plug-in grounding pins can be flexibly increased to provide better support for the photovoltaic modules.

[0012] Preferably, a sliding tensioning mechanism is provided between the longitudinal slide rod and the transverse slide rod, and the longitudinal slide rod and the transverse slide rod can be tightly connected together through the sliding tensioning mechanism, and the position can be easily adjusted.

[0013] By adopting the above technical solution, the position of the transverse slide rod on the longitudinal slide rod can be easily adjusted, the spacing between the longitudinal slide rods can be easily adjusted, and the photovoltaic panel group can be easily installed.

[0014] Preferably, the sliding tensioning mechanism includes: a slider, which is slidably mounted on the outer surface of the longitudinal slide rod, and the longitudinal slide rod is engaged with the slider, a plug-in block is fixedly mounted on the side surface of the slider, and a tightening block is slidably mounted inside the plug-in block, a wedge block is fixedly mounted on the outer surface of one end of the tightening block, and the wedge block and the plug-in block are slidably connected, the plug-in block is inserted into the inside of the transverse slide rod, and a first screw is threadedly mounted on the outer surface of the transverse slide rod, the first screw is threadedly connected to the wedge block, and the tightening block is respectively fitted with the outer surfaces of the longitudinal slide rod and the transverse slide rod.

[0015] With the above technical solution, when in use, it is only necessary to insert the plug-in blocks into the two ends of the horizontal slide rod, and then the slider can be inserted into the groove of the longitudinal slide rod. After adjusting the position of the longitudinal slide rod, the first screw can be screwed into the inside of the horizontal slide rod, and as the first screw is screwed in, the wedge block is pushed, and the wedge block moves to push the tightening block, so that the tightening block can be pushed out and tighten the longitudinal slide rod and the transverse slide rod, so that the longitudinal slide rod and the transverse slide rod can be quickly fixed.

[0016] Preferably, plug-in rods are inserted at both ends of the longitudinal slide rod, and the outer surface of the plug-in rod is tightly fitted with the inner surface of the longitudinal slide rod, a second screw is installed in the threaded hole at one end of the longitudinal slide rod, and the second screw passes through the outer surface of the plug-in rod, and the plug-in rod is fitted with the outer surface of the second screw.

[0017] By adopting the above technical solution, the longitudinal slide rod can be extended and installed conveniently by plugging the plug rod into the longitudinal slide rod and connecting the longitudinal slide rod and the plug rod with the second screw.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the spliced ​​BIPV photovoltaic module with sliding adjustable mounting points:

[0019] 1. Before installing the photovoltaic panel group, you need to assemble the guide piece and the square bottom screw according to the size of the photovoltaic panel group and insert them into the groove of the horizontal slide rod. After the longitudinal slide rod and the horizontal slide rod are assembled, place the photovoltaic panel group on the outer surface of the longitudinal slide rod and the horizontal slide rod, install the clamping rubber piece and nut on the outer surface of the square bottom screw, move and adjust the position of the square bottom screw to the required fixing point and tighten the nut so that the clamping rubber piece presses against the photovoltaic panel group to fix the photovoltaic panel group. The fixing position of the photovoltaic panel group can be flexibly adjusted and additional fixing points on the side of the photovoltaic panel group can be conveniently added.

[0020] 2. During assembly, a corresponding number of grounding pins can be inserted into the outer surface of the longitudinal slide rod according to the length of the longitudinal slide rod. The position of the grounding pins can then be adjusted at will. After the position is adjusted, the grounding pins can be locked with set screws to fix them to the outer surface of the longitudinal slide rod. This makes it easy to increase the number of grounding pins and adjust the position, while providing better support for the longitudinal slide rod.

[0021] 3. When docking the longitudinal slide rod with the transverse slide rod, it is only necessary to insert the plug-in blocks into both sides of the plug-in blocks and insert the sliders into the grooves on the side surfaces of the longitudinal slide rods. The first screw can be screwed into the outer surface of the transverse slide rod, and the first screw pushes the wedge block as it is screwed in. The movement of the wedge block pushes the tightening block, so that the tightening block can precisely fit with the outer surfaces of the longitudinal slide rod and the transverse slide rod, thereby completing the fixation of the longitudinal slide rod and the transverse slide rod, and the distance between the transverse slide rods can be conveniently adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the longitudinal slide rod and photovoltaic module of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the horizontal sliding groove rod and the plug-in grounding pin of the utility model;

[0024] Figure 3 This is a schematic diagram of the exploded three-dimensional structure of the longitudinal slide rod and the transverse slide rod of the utility model;

[0025] Figure 4 This is a schematic diagram of the cross-sectional three-dimensional structure of the longitudinal sliding groove rod and the plug-in grounding foot of the utility model;

[0026] Figure 5 This is a schematic diagram of the exploded three-dimensional structure of the guide piece and the square bottom screw of the utility model;

[0027] Figure 6 This is a schematic diagram of the cross-sectional three-dimensional structure of the plug-in block and the tightening block of the utility model;

[0028] Figure 7 This is a schematic structural diagram of the snap connector of the utility model;

[0029] Figure 8 This is a schematic diagram of the opening and closing of the 360° standing seam piece of the present invention.

[0030] In the figure: 1. Longitudinal slide rod; 2. Horizontal slide rod; 3. Plug-in grounding foot; 4. Set screw; 5. Guide plate; 6. Square bottom screw; 7. Clamping rubber sheet; 8. Nut; 9. Slider; 10. Plug-in block; 11. Clamping block; 12. Wedge block; 13. First screw; 14. Plug-in rod; 15. Second screw; 16. Photovoltaic panel group; 17. Threaded plug connector; 18. 360° upright locking piece; 19. Tightening piece; 20. Fixing screw; 21. Fastener. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-6 The utility model provides a technical solution: a spliced ​​BIPV photovoltaic assembly with adjustable sliding mounting points, comprising a longitudinal slide rod 1, a transverse slide rod 2 being fitted on the outer surface of the longitudinal slide rod 1, and grooves are provided on the outer surfaces of the transverse slide rod 2 and the longitudinal slide rod 1, and the longitudinal slide rod 1 and the transverse slide rod 2 are hollow in design, a photovoltaic panel group 16 is provided on one side of the longitudinal slide rod 1 and the transverse slide rod 2, and the photovoltaic panel group 16 is respectively fitted with the outer surfaces of the longitudinal slide rod 1 and the transverse slide rod 2, a slidable fixing mechanism is provided between the longitudinal slide rod 1, the transverse slide rod 2 and the photovoltaic panel group 16, and the slidable fixing mechanism makes it possible to fix the photovoltaic panel group 16 more flexibly and to conveniently increase fixing points.

[0033] The hollow design of the longitudinal slide rod 1 and the transverse slide rod 2 can effectively reduce the overall weight of the component to facilitate transportation and handling, and the grooves on the outer surfaces of the longitudinal slide rod 1 and the transverse slide rod 2 can facilitate the installation of other spare parts.

[0034] The slidable fixing mechanism includes: a guide piece 5, a square bottom screw 6 is installed through the outer surface of the guide piece 5, and the square bottom screw 6 is engaged with the guide piece 5, the guide piece 5 and the square bottom screw 6 are respectively inserted into the grooves of the longitudinal slide rod 1 and the transverse slide rod 2, and the outer surface of the square bottom screw 6 is in contact with the outer surface of the photovoltaic panel group 16, a clamping rubber piece 7 is installed through the outer surface of the square bottom screw 6, and the clamping rubber piece 7 and the square bottom screw 6 are slidably connected, a nut 8 is threadedly installed on the outer surface of the square bottom screw 6, and the nut 8 is in contact with the outer surface of the clamping rubber piece 7, and the outer surface of the clamping rubber piece 7 is in contact with the outer surface of the photovoltaic panel group 16.

[0035] The slidable fixing mechanism can also be a snap-on connector, which includes a threaded plug connector 17 and a 360° upright locking member 18. The plug connector 17 is provided with a fixing screw 20 and a fixing frame. The 360° upright locking member 18 includes a tightening member 19 and a snap-on member 21 arranged in the fixing frame. This connection method has good waterproof performance.

[0036] After the cam 16 is fixed to the frame 1, the cam 16 can be fixed to the frame 1 by inserting the guide piece 5 and the square bottom screw 6 into the groove of the horizontal slide rod 2. Then, the horizontal slide rod 2 and the longitudinal slide rod 1 can be fixed. When the longitudinal slide rod 1 and the transverse slide rod 2 are fixed, the photovoltaic panel group 16 can be placed and pushed into the outer surface of the longitudinal slide rod 1 and the transverse slide rod 2 from the side. Then, the guide piece 5 and the square bottom screw 6 can be pushed into the longitudinal slide rod 1, and the clamping rubber piece 7 can be moved by tightening the nut 8 so that the clamping rubber piece 7 can be pressed and fixed to the photovoltaic panel group 16. According to the fixing situation, the guide piece 5 and the square bottom screw 6 can be added to the groove of the longitudinal slide rod 1 to increase the fixing point of the photovoltaic panel group 16, so that the fixing point of the photovoltaic panel group 16 can be flexibly adjusted and increased, so that the photovoltaic panel group 16 can be fixed more firmly, and the sliding of the guide piece 5 can release temperature stress.

[0037] The outer surface of the longitudinal slide rod 1 is provided with a plug-in thread mechanism, which can conveniently fix the longitudinal slide rod 1 on the outer surface of the object to be installed through the plug-in thread mechanism. The plug-in thread mechanism includes: a plug-in grounding foot 3, which is inserted into the groove of the longitudinal slide rod 1, and the outer surface of the longitudinal slide rod 1 is in contact with the outer surface of the plug-in grounding foot 3. A mounting hole is provided on the outer surface of the plug-in grounding foot 3, and a locking screw 4 is threadedly installed on the outer surface of the plug-in grounding foot 3, and the outer surface of the locking screw 4 is in contact with the outer surface of the longitudinal slide rod 1.

[0038] During installation, it is necessary to insert a corresponding number of plug-in grounding pins 3 according to the length of the longitudinal slide rod 1, and the plug-in grounding pins 3 can be flexibly moved after being plugged into the longitudinal slide rod 1. After the plug-in grounding pins 3 are moved to the position where they need to be installed, the fixing screws 4 can be tightened so that the plug-in grounding pins 3 can be fixed on the outer surface of the longitudinal slide rod 1, which makes it convenient to adjust the position of the plug-in grounding pins 3 on the outer surface of the longitudinal slide rod 1, and it is also convenient to add plug-in grounding pins 3 to improve the supporting force of the longitudinal slide rod 1.

[0039] A sliding tensioning mechanism is provided between the longitudinal slide rod 1 and the transverse slide rod 2, so that the longitudinal slide rod 1 and the transverse slide rod 2 can be tightly connected together through the sliding tensioning mechanism, and the position can be easily adjusted. The sliding tensioning mechanism includes: a slider 9, which is slidably installed on the outer surface of the longitudinal slide rod 1, and the longitudinal slide rod 1 is engaged with the slider 9, and the side surface of the slider 9 is fixedly installed with a plug-in block 10, and the inner side of the plug-in block 10 is slidably installed with a tightening block 11, and the outer surface of one end of the tightening block 11 is fixedly installed with a wedge block 12, and the wedge block 12 is slidably connected to the plug-in block 10, the plug-in block 10 is inserted into the inside of the transverse slide rod 2, and the outer surface of the transverse slide rod 2 is threadedly installed with a first screw 13, and the first screw 13 is threadedly connected to the wedge block 12, and the tightening block 11 is respectively fitted with the outer surfaces of the longitudinal slide rod 1 and the transverse slide rod 2.

[0040] When the first screw 13 is screwed into the inner part of the transverse slide rod 2, the transverse slide rod 2 will be pushed and screwed into the wedge block 12, so that the wedge block 12 can be pushed open by the first screw 13, so that the wedge block 12 can push the tightening block 11, so that the tightening block 11 can fit tightly with the outer surfaces of the longitudinal slide rod 1 and the transverse slide rod 2, making it convenient to adjust the distance between the transverse slide rod 2 and allowing the longitudinal slide rod 1 and the transverse slide rod 2 to be connected to each other, greatly improving the efficiency of installation and assembly.

[0041] A plug-in rod 14 is inserted at both ends of the longitudinal slide rod 1, and the outer surface of the plug-in rod 14 is tightly fitted with the inner surface of the longitudinal slide rod 1. A second screw 15 is installed in the threaded hole at one end of the longitudinal slide rod 1, and the second screw 15 passes through the outer surface of the plug-in rod 14, and the outer surface of the plug-in rod 14 and the second screw 15 are fitted together.

[0042] When the longitudinal slide rod 1 needs to be extended, it is only necessary to insert the plug rod 14 into one end of the longitudinal slide rod 1 and screw the second screw 15 into the outer surface of the longitudinal slide rod 1 to connect the longitudinal slide rod 1 and the plug rod 14. Then, insert the other longitudinal slide rod 1 into the plug rod 14 and screw in another second screw 15 to connect the two longitudinal slide rods 1, so that the two longitudinal slide rods 1 can be connected for extension and fixation.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spliced ​​BIPV photovoltaic assembly with a sliding adjustable mounting point, comprising a longitudinal slide rod (1), the outer surface of the longitudinal slide rod (1) being fitted with a transverse slide rod (2), and the outer surfaces of the transverse slide rod (2) and the longitudinal slide rod (1) are both provided with grooves, and the longitudinal slide rod (1) and the transverse slide rod (2) are hollow in design, a photovoltaic panel group (16) is provided on one side of the longitudinal slide rod (1) and the transverse slide rod (2), and the photovoltaic panel group (16) is fitted with the outer surfaces of the longitudinal slide rod (1) and the transverse slide rod (2), respectively, and characterized in that: A slidable fixing mechanism is provided between the longitudinal sliding groove rod (1), the transverse sliding groove rod (2) and the photovoltaic panel group (16). The slidable fixing mechanism enables the photovoltaic panel group (16) to be fixed more flexibly and allows for convenient addition of fixing points.

2. The spliced ​​BIPV photovoltaic module with sliding adjustable mounting points according to claim 1, characterized in that: The slidable fixing mechanism is a snap-on connector, which includes a threaded plug connector (17) and a 360° upright locking member (18). The plug connector (17) is provided with a fixing screw (20) and a fixing frame, and the 360° upright locking member (18) includes a loose member (19) and a snap-on member (21) arranged in the fixing frame.

3. The spliced ​​BIPV photovoltaic module with sliding adjustable mounting points according to claim 1, characterized in that: The slidable fixing mechanism comprises: a guide piece (5); a square bottom screw (6) is installed through the outer surface of the guide piece (5), and the square bottom screw (6) is engaged with the guide piece (5); the guide piece (5) and the square bottom screw (6) are respectively inserted into the grooves of the longitudinal sliding groove rod (1) and the transverse sliding groove rod (2), and the outer surface of the square bottom screw (6) is in contact with the outer surface of the photovoltaic panel group (16); a clamping rubber piece (7) is installed through the outer surface of the square bottom screw (6), and the clamping rubber piece (7) and the square bottom screw (6) are in sliding connection; a nut (8) is threadedly installed on the outer surface of the square bottom screw (6), and the nut (8) is in contact with the outer surface of the clamping rubber piece (7), and the outer surface of the clamping rubber piece (7) is in contact with the outer surface of the photovoltaic panel group (16).

4. The spliced ​​BIPV photovoltaic module with sliding adjustable mounting points according to claim 1, characterized in that: The outer surface of the longitudinal slide rod (1) is provided with a plug-in thread mechanism, and the longitudinal slide rod (1) and the transverse slide rod (2) are conveniently fixedly mounted on the outer surface of the object to be mounted via the plug-in thread mechanism.

5. The spliced ​​BIPV photovoltaic module with sliding adjustable mounting points according to claim 4, characterized in that: The plug-in thread mechanism comprises: a plug-in grounding foot (3), the plug-in grounding foot (3) being inserted into a groove of the longitudinal slide rod (1), and the outer surface of the longitudinal slide rod (1) being in contact with the outer surface of the plug-in grounding foot (3), a mounting hole being provided on the outer surface of the plug-in grounding foot (3), and a set screw (4) being threadedly mounted on the outer surface of the plug-in grounding foot (3), and the outer surface of the set screw (4) being in contact with the outer surface of the longitudinal slide rod (1).

6. The spliced ​​BIPV photovoltaic module with sliding adjustable mounting points according to claim 1, characterized in that: A sliding tensioning mechanism is provided between the longitudinal sliding groove rod (1) and the transverse sliding groove rod (2), and the longitudinal sliding groove rod (1) and the transverse sliding groove rod (2) can be tightly connected together through the sliding tensioning mechanism, and the position can be easily adjusted.

7. The spliced ​​BIPV photovoltaic module with sliding adjustable mounting points according to claim 6, characterized in that: The sliding tensioning mechanism comprises: a slider (9), the slider (9) is slidably mounted on the outer surface of the longitudinal sliding groove rod (1), and the longitudinal sliding groove rod (1) is engaged with the slider (9), a plug-in block (10) is fixedly mounted on the side surface of the slider (9), and a tightening block (11) is slidably mounted inside the plug-in block (10), a wedge block (12) is fixedly mounted on the outer surface of one end of the tightening block (11), and the wedge block (12) is slidably connected to the plug-in block (10), the plug-in block (10) is inserted into the interior of the transverse sliding groove rod (2), and a first screw (13) is threadedly mounted on the outer surface of the transverse sliding groove rod (2), and the first screw (13) is threadedly connected to the wedge block (12), and the tightening block (11) is respectively fitted with the outer surfaces of the longitudinal sliding groove rod (1) and the transverse sliding groove rod (2).

8. The spliced ​​BIPV photovoltaic module with sliding adjustable mounting points according to claim 1, characterized in that: The two ends of the longitudinal slide rod (1) are provided with plug-in rods (14), and the outer surface of the plug-in rod (14) is tightly fitted with the inner surface of the longitudinal slide rod (1); a second screw (15) is installed in the threaded hole at one end of the longitudinal slide rod (1), and the second screw (15) passes through the outer surface of the plug-in rod (14), and the outer surface of the plug-in rod (14) is fitted with the outer surface of the second screw (15).

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