Greenhouse assembly with quick release structure

Abstract

The utility model relates to the related technical field of greenhouses, in particular to a greenhouse assembly with a quick release structure, which comprises a greenhouse support, a ceiling connecting rod rotating shaft is arranged at the top end of the greenhouse support, rotary connecting rings are arranged on the upper side and the lower side of the middle of the greenhouse support in a slotted manner, and a support connecting box is arranged at one end of each rotary connecting ring. A rotating button is arranged in the middle of the upper end of the support connecting box. The improved greenhouse assembly with the quick release structure is provided with the rotary connecting ring and the fixed circular ring sleeve, and the rotary connecting ring is arranged in the middle of the greenhouse support, so that the support connecting box can be fixed to the outer circle of the rotary connecting ring; and through the fixing ring sleeves fixed to the outer surfaces of the greenhouse supports, the connecting cross rods which are transversely connected can be fixed to the middle portions of the greenhouse supports through hexagon bolts, the greenhouse quick-release structure composed of the greenhouse supports can be conveniently disassembled and assembled, and then the practicability of the assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to greenhouses, in particular to a greenhouse component with a quick-disassembly structure. Background Art

[0002] Greenhouses are often used as protective devices in agricultural planting. When the temperature of outdoor conditions drops, the growing conditions of crops in winter are harsh, making it impossible for a large number of crops to grow in the field. Therefore, the protection of greenhouses is needed to make the temperature growth environment in the greenhouse suitable for crop growth.

[0003] Greenhouses need to choose whether to continue to be installed in the field according to seasonal conditions in different seasons, so a quick-disassembly structure is required during installation and disassembly of the greenhouse so that users can reduce work pressure and improve the practicality of the greenhouse components.

[0004] The existing patent (publication number: CN214229125U) discloses a greenhouse support structure that is easy to install, including a vertical pipe, an arched pipe, a support rod, a front column and a crossbeam. The crossbeam is composed of a disassembled connected plug plate and a connecting plate. Both sides of the connecting plate are provided with flanges bent inwardly, and a retaining edge bent inwardly is provided on the plug plate. The end of the plug plate is connected to the connecting plate and the retaining edge abuts against the side wall of the flange, thereby realizing the connection of multiple sections of plug plates, and then the user can choose the number of connected plug plates according to the length requirement of the crossbeam. The operation method is simple, and the connection of the crossbeam can be achieved only by assembling the plug plate and the connecting plate. The abutment of the flange and the retaining edge can improve the connection stability of the plug plate and the connecting plate, thereby ensuring the stability of the connection of the greenhouse support. In the process of realizing the utility model, the inventors found that the prior art had the following problems: 1. The traditional greenhouse assemblies cannot be quickly disassembled and assembled during use, so the user cannot quickly disassemble and install the greenhouse, which brings trouble to the use; 2. The spacing between each bracket of the traditional greenhouse assembly cannot be adjusted, which greatly increases the cost burden when assembling the greenhouse. Utility Model Content

[0005] The purpose of the utility model is to provide a greenhouse assembly with a quick-disassembly structure to solve the problems in the above-mentioned background technology that the traditional greenhouse assembly cannot be quickly disassembled and the spacing between the assembly brackets cannot be adjusted. To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a greenhouse assembly with a quick-disassembly structure includes a greenhouse bracket, a ceiling connecting rod rotating shaft is provided at the top of the greenhouse bracket, and a rotating connecting ring is provided with grooves on the upper and lower sides of the middle of the greenhouse bracket, a bracket connecting box is provided at one end of the rotating connecting ring, and a rotating knob is provided in the middle of the upper end of the bracket connecting box, a rotating threaded rod is provided below the rotating knob, and rotating connecting rods are provided between the bracket connecting boxes;

[0006] Connecting cross bars are evenly spaced between the greenhouse brackets on the left and right sides, and fixed circular ring sleeves are provided on the left and right sides of the connecting cross bars, hexagonal bolts are provided on the upper ends of the fixed circular ring sleeves, and a ceiling connecting block is provided above the middle of the connecting cross bar, two connecting block rotating shafts are symmetrically provided inside the ceiling connecting block, and ceiling connecting rod bodies are provided at the bottom ends of the connecting block rotating shafts, and ceiling telescopic threaded rods are provided between the ceiling connecting blocks.

[0007] Further preferably, the inner ring surface of the rotating connecting ring is slidably sleeved on the outer ring surface in the middle part of the greenhouse support, and the upper and lower sides of the end surface of the support connecting box close to the rotating connecting ring are fixed to the outer ring cylindrical end of the rotating connecting ring by screws, and the bottom end of the rotating threaded rod is bearing-connected to the bottom end of the inner wall of the rectangular groove of the support connecting box, the upper end of the rotating threaded rod passes through the bearing and is connected to the middle part of the top end of the support connecting box, and the bottom end of the rotating button is fixed to the upper end of the rotating threaded rod, and the middle part of the bottom end of the rotating button is bearing-connected to the middle part of the upper surface of the support connecting box.

[0008] Further preferably, the middle part of the rotating threaded rod is threadedly connected to the middle part of the fixed sliding block at the front and rear ends of the rotating connecting rod, and the surfaces of the fixed sliding blocks at the front and rear ends of the rotating connecting rod are slidably connected to the inner wall of the rectangular groove of the bracket connecting box, and the front and rear sides of the middle part of the two rotating connecting rods are rotatably connected by two rotating shafts, the front and rear ends of the rotating connecting rod are rotatably connected to the middle part of the fixed sliding block away from the bracket connecting box, and the thread directions of the upper and lower ends of the rotating threaded rod are opposite.

[0009] Further preferably, the left and right ends of the connecting cross bar are slidably connected to the inner ring surface of the fixed circular ring sleeve, and the end of the fixed circular ring sleeve close to the greenhouse support is fixed to the middle surface of the greenhouse support, and the middle part of the hexagonal bolt is threaded through and connected to the middle of the top of the fixed circular ring sleeve, circular holes are opened in the middle of the upper and lower sides of the left and right ends of the connecting cross bar, and the middle part of the bottom end of the hexagonal bolt is threadedly connected to the inner walls of the circular holes on the left and right ends of the connecting cross bar, and the bottom end of the hexagonal bolt is threaded through and connected to the middle of the bottom ends on the left and right sides of the fixed circular ring sleeve.

[0010] Further preferably, the front and rear sides of the ceiling connecting rod rotating shaft are both bearing-connected to the middle part of the upper end of the greenhouse support, and the middle part of the ceiling connecting rod rotating shaft is rotatably connected with a locking sleeve, and the bottom end of the ceiling connecting rod main body is snap-connected to the inner wall of the locking sleeve, the top end of the ceiling connecting rod main body is slidably connected to the inner wall of the connecting block rotating shaft, and the upper and lower ends of the ceiling connecting rod main body have smaller diameters than the middle cross-sectional diameter of the ceiling connecting rod main body.

[0011] Further preferably, the middle parts of the front and rear ends of the connecting block shaft are bearing-connected to the front and rear sides of the inner wall of the ceiling connecting block, and a clamping ring is fixed in the middle part of one side of the ceiling connecting block close to the ceiling telescopic threaded rod, and a hexagonal bolt is threaded through the middle part of the upper end of the clamping ring, the outer ring surfaces of the front and rear ends of the ceiling telescopic threaded rod are slidably connected to the inner wall of the clamping ring on the surface of the ceiling connecting block, and the middle parts of the hexagonal bolts are threaded through the inner wall of the groove in the middle parts of the front and rear ends of the ceiling telescopic threaded rod, and the middle parts of the ceiling telescopic threaded rod are threadedly connected to each other through a threaded rotating sleeve.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the utility model, a rotating connecting ring and a fixed circular ring sleeve are provided. By providing a rotating connecting ring in the middle part of the greenhouse bracket, the bracket connecting box can be fixed to the outer cylindrical end of the rotating connecting ring by screws, and the fixed circular ring sleeve fixed on the outer surface of the greenhouse bracket can make the transversely connected connecting cross bar fixed to the middle part of the greenhouse bracket by hexagonal bolts, so that the greenhouse quick-disassembly structure composed of the greenhouse bracket can be easy to disassemble and assemble, thereby improving the practicality of the component.

[0014] In the utility model, a rotating connecting rod and a ceiling telescopic threaded rod are provided, and the rotating threaded rod is driven to rotate by rotating the rotating knob, so that the fixed sliding blocks threadedly connected at the front and rear ends of the rotating connecting rod move up and down, so that the rotating connecting rods rotate around the rotating shaft, so as to adjust the expansion length of the rotating connecting rod and thus adjust the distance between the front and rear greenhouse brackets, and then rotate the middle threaded rotating sleeve of the ceiling telescopic threaded rod to make the two ends of the ceiling telescopic threaded rod telescope and align with the clamping rings on both sides of the ceiling connecting block and fix them through hexagonal bolts, finally completing the purpose of adjusting the distance between the greenhouse brackets, so that users can reduce costs to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is an enlarged structural diagram of the rotating connecting rod of the utility model;

[0017] Figure 3 This is an enlarged structural diagram of the main body of the ceiling connecting rod of the utility model;

[0018] Figure 4 This is an enlarged structural diagram of the fixed circular ring sleeve of the utility model;

[0019] Figure 5 This is a schematic diagram of an enlarged front section structure of a ceiling connecting block of the utility model.

[0020] In the figure: 1. Greenhouse bracket; 2. Rotating connecting ring; 3. Ceiling connecting rod shaft; 4. Bracket connecting box; 5. Rotating threaded rod; 6. Rotating connecting rod; 7. Rotating button; 8. Ceiling connecting rod body; 9. Ceiling connecting block; 10. Ceiling telescopic threaded rod; 11. Connecting cross bar; 12. Connecting block shaft; 13. Fixed ring sleeve; 14. Hexagonal bolt. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5 The utility model provides a technical solution: a greenhouse assembly with a quick-disassembly structure, including a greenhouse bracket 1, a top of the greenhouse bracket 1 is provided with a ceiling connecting rod rotating shaft 3, and the middle of the greenhouse bracket 1 is grooved with a rotating connecting ring 2 on both sides of the upper and lower parts, a bracket connecting box 4 is provided at one end of the rotating connecting ring 2, and a rotating knob 7 is provided at the middle of the upper end of the bracket connecting box 4, a rotating threaded rod 5 is provided below the rotating knob 7, and a rotating connecting rod 6 is provided between the bracket connecting boxes 4;

[0023] Connecting cross bars 11 are evenly spaced between the left and right greenhouse brackets 1, and fixed circular ring sleeves 13 are provided on both sides of the connecting cross bars 11, and hexagonal bolts 14 are provided on the upper ends of the fixed circular ring sleeves 13, and a ceiling connecting block 9 is provided above the middle of the connecting cross bars 11, and two connecting block rotating shafts 12 are symmetrically provided inside the ceiling connecting block 9, and the bottom ends of the connecting block rotating shafts 12 are provided with ceiling connecting rod bodies 8, and ceiling telescopic threaded rods 10 are provided between the ceiling connecting blocks 9.

[0024] In this embodiment, Figure 1 and Figure 2As shown, the inner ring surface of the rotating connecting ring 2 is slidably sleeved on the outer ring surface in the middle of the greenhouse bracket 1, and the upper and lower sides of the end surface of the bracket connecting box 4 close to the rotating connecting ring 2 are fixed to the outer cylindrical end of the rotating connecting ring 2 by screws, and the bottom end of the rotating threaded rod 5 is bearing-connected to the bottom end of the inner wall of the rectangular groove of the bracket connecting box 4, the upper end of the rotating threaded rod 5 passes through the bearing and is connected to the middle of the top end of the bracket connecting box 4, and the bottom end of the rotating button 7 is fixed to the upper end of the rotating threaded rod 5, and the middle part of the bottom end of the rotating button 7 is bearing-connected to the middle of the upper surface of the bracket connecting box 4; by rotating the rotating button 7, the rotating threaded rod 5 can be driven to rotate, so that the fixed sliding blocks at the front and rear ends of the rotating connecting rod 6 slide up and down along the inner wall of the bracket connecting box 4, so that the distance between the front and rear ends of the rotating connecting rod 6 changes.

[0025] In this embodiment, Figure 1 and Figure 2 As shown, the middle part of the rotating threaded rod 5 passes through the middle part of the fixed sliding block that is threadedly connected to the front and rear ends of the rotating connecting rod 6, and the surfaces of the fixed sliding blocks at the front and rear ends of the rotating connecting rod 6 are slidably connected to the inner wall of the rectangular groove of the bracket connecting box 4, and the front and rear sides of the middle part of the two rotating connecting rods 6 are rotatably connected by two rotating shafts, and the front and rear ends of the rotating connecting rod 6 are rotatably connected to the middle part of the fixed sliding block away from the bracket connecting box 4, and the upper and lower ends of the rotating threaded rod 5 have opposite thread directions; by providing threads in opposite directions at the upper and lower ends of the rotating threaded rod 5, when the rotating knob 7 is rotated, the threaded fixed sliding blocks can slide in opposite directions, thereby adjusting the spacing of the rotating connecting rods 6.

[0026] In this embodiment, Figure 1 and Figure 4 As shown, the left and right ends of the connecting cross bar 11 are slidably connected to the inner ring surface of the fixed annular sleeve 13, and the end of the fixed annular sleeve 13 close to the greenhouse support 1 is fixed to the middle surface of the greenhouse support 1, and the middle part of the hexagonal bolt 14 is threadedly connected to the middle of the top of the fixed annular sleeve 13, and the middle parts of the upper and lower sides of the left and right ends of the connecting cross bar 11 are provided with circular holes, and the middle parts of the bottom ends of the hexagonal bolts 14 are threadedly connected to the inner walls of the circular holes at the left and right ends of the connecting cross bar 11, and the bottom ends of the hexagonal bolts 14 are threadedly connected to the middle parts of the bottom ends of the left and right sides of the fixed annular sleeve 13; the fixed annular sleeve 13 is provided on the surface of the greenhouse support 1, and is connected through the connecting cross bar 11, and at the same time, the connecting cross bar 11 and the fixed annular sleeves 13 at both ends are connected by the threaded hexagonal bolts 14 to keep them fixed.

[0027] In this embodiment, Figure 1 and Figure 3As shown, the front and rear sides of the ceiling connecting rod shaft 3 are both connected to the middle part of the upper end of the greenhouse bracket 1 by bearings, and the middle part of the ceiling connecting rod shaft 3 is rotatably connected with a locking sleeve, and the bottom ends of the ceiling connecting rod main body 8 are both locked and connected to the inner wall of the locking sleeve, the top end of the ceiling connecting rod main body 8 is slidably connected to the inner wall of the connecting block shaft 12, and the upper and lower ends of the ceiling connecting rod main body 8 are smaller than the middle cross-sectional diameter of the ceiling connecting rod main body 8; the ceiling connecting rod shaft 3 is connected to the top bearing of the greenhouse bracket 1, and the ceiling connecting rod main body 8 is inserted therein, and the other end of the ceiling connecting rod main body 8 is fixed by the connecting block shaft 12, and the upper ends of the ceiling connecting rod main bodies 8 on both sides are both sleeved inside the connecting block shaft 12 inside the ceiling connecting block 9.

[0028] In this embodiment, Figure 1 and Figure 5 As shown, the middle parts of the front and rear ends of the connecting block shaft 12 are bearing-connected to the front and rear sides of the inner wall of the ceiling connecting block 9, and the middle part of the side of the ceiling connecting block 9 close to the ceiling telescopic threaded rod 10 is fixed with a clamping ring, and the middle part of the upper end of the clamping ring is threadedly connected with a hexagonal bolt 14, the outer ring surfaces of the front and rear ends of the ceiling telescopic threaded rod 10 are slidably connected to the inner wall of the clamping ring on the surface of the ceiling connecting block 9, and the middle part of the hexagonal bolt 14 is threadedly connected to the inner wall of the middle groove of the front and rear ends of the ceiling telescopic threaded rod 10, and the middle part of the ceiling telescopic threaded rod 10 is threadedly connected to each other through a threaded rotating sleeve; the ceiling telescopic threaded rod 10 is arranged between the ceiling connecting blocks 9 on the front and rear sides, and the two ends of the ceiling telescopic threaded rod 10 are fixed by the hexagonal bolts 14, and the stability between the ceiling connecting blocks 9 is ensured by the connection of the ceiling telescopic threaded rod 10.

[0029] The use method and advantages of the utility model: When the greenhouse assembly with a quick-disassembly structure is used, the working process is as follows:

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, first, the user can fix the bottom end of the greenhouse bracket 1 at the position where the greenhouse is to be installed, then rotate the rotating connecting ring 2 in the middle of the greenhouse bracket 1 so that the cylinder is aligned with the extension direction of the greenhouse, and then fix the surface of the bracket connecting box 4 to the cylinder of the outer ring of the rotating connecting ring 2 by screws, and fix the surface of the bracket connecting box 4 on the other side to the cylinder of the outer ring of the rotating connecting ring 2 in the middle of another greenhouse bracket 1 by screws, and then rotate the rotating button 7 so that the rotating button 7 drives the rotating threaded rod 5 to rotate, thereby making the fixed connecting blocks at the front and rear ends of the threaded rotating connecting rod 6 slide up and down, thereby expanding the distance between the two greenhouse brackets 1, and then fix the unfixed greenhouse bracket 1 in the field;

[0031] Then, the end of the connecting cross bar 11 is engaged with the inside of the fixed circular ring sleeve 13 of the outer ring of the greenhouse bracket 1, and the end of the connecting cross bar 11 is fixed inside the fixed circular ring sleeve 13 by the hexagonal bolt 14, and then the other end of the connecting cross bar 11 is fixed inside the fixed circular ring sleeve 13 on the outer surface of the greenhouse bracket 1 on the other side, and the hexagonal bolt 14 is tightened. The user can install the number of connecting cross bars 11 according to actual needs, and then insert the bottom end of the ceiling connecting rod body 8 into the interior of the ceiling connecting rod shaft 3 at the upper end of the greenhouse bracket 1, and rotate the ceiling connecting rod body 8 so that The top ends of the ceiling connecting rod bodies 8 on the left and right sides are aligned with the connecting block shaft 12 inside the ceiling connecting block 9, and the ceiling connecting rod bodies 8 are fixed by screws. Then, one end of the ceiling telescopic threaded rod 10 is inserted into the clamping ring in the middle of the rear surface of the front ceiling connecting block 9 and fixed with the hexagonal bolt 14. Then, the middle part of the ceiling telescopic threaded rod 10 is rotated so that the two ends of the ceiling telescopic threaded rod 10 are extended until the rear end of the ceiling telescopic threaded rod 10 is inserted into the clamping ring in the middle of the front surface of the rear ceiling connecting block 9 and fixed with the hexagonal bolt 14.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A greenhouse assembly with a quick-disassembly structure, comprising a greenhouse support (1), characterized in that: The top of the greenhouse support (1) is provided with a ceiling connecting rod rotating shaft (3), and a rotating connecting ring (2) is provided with grooves on both upper and lower sides of the middle of the greenhouse support (1), a support connecting box (4) is provided at one end of the rotating connecting ring (2), and a rotating button (7) is provided at the middle of the upper end of the support connecting box (4), a rotating threaded rod (5) is provided below the rotating button (7), and rotating connecting rods (6) are provided between the support connecting boxes (4); A connecting cross bar (11) is evenly spaced between the greenhouse brackets (1) on the left and right sides, and a fixing annular sleeve (13) is provided on both sides of the connecting cross bar (11), and a hexagonal bolt (14) is provided at the upper end of the fixing annular sleeve (13), and a ceiling connecting block (9) is provided above the middle of the connecting cross bar (11), and two connecting block rotating shafts (12) are symmetrically provided inside the ceiling connecting block (9), and a ceiling connecting rod body (8) is provided at the bottom end of each connecting block rotating shaft (12), and a ceiling telescopic threaded rod (10) is provided between the ceiling connecting blocks (9).

2. The greenhouse assembly with a quick-disassembly structure according to claim 1, characterized in that: The inner ring surface of the rotating connecting ring (2) is slidably sleeved on the middle outer ring surface of the greenhouse support (1), and the upper and lower sides of the support connecting box (4) close to one end surface of the rotating connecting ring (2) are fixed to the outer cylindrical end of the rotating connecting ring (2) by screws, and the bottom end of the rotating threaded rod (5) is bearing-connected to the bottom end of the inner wall of the rectangular groove of the support connecting box (4), the upper end of the rotating threaded rod (5) passes through the bearing and is connected to the middle of the top end of the support connecting box (4), and the bottom end of the rotating button (7) is fixed to the upper end of the rotating threaded rod (5), and the middle part of the bottom end of the rotating button (7) is bearing-connected to the middle part of the upper surface of the support connecting box (4).

3. The greenhouse assembly with a quick-disassembly structure according to claim 1, characterized in that: The middle part of the rotating threaded rod (5) is threadedly connected to the middle part of the fixed sliding blocks at the front and rear ends of the rotating connecting rod (6), and the surfaces of the fixed sliding blocks at the front and rear ends of the rotating connecting rod (6) are slidably connected to the inner wall of the rectangular groove of the bracket connecting box (4), and the front and rear sides of the middle part of the two rotating connecting rods (6) are rotatably connected through two rotating shafts, the front and rear ends of the rotating connecting rod (6) are rotatably connected to the middle part of the fixed sliding block away from the bracket connecting box (4), and the thread directions of the upper and lower ends of the rotating threaded rod (5) are opposite.

4. The greenhouse assembly with a quick-disassembly structure according to claim 1, characterized in that: The left and right ends of the connecting cross bar (11) are slidably connected to the inner ring surface of the fixed circular ring sleeve (13), and the end of the fixed circular ring sleeve (13) close to the greenhouse support (1) is fixed to the middle surface of the greenhouse support (1), and the middle part of the hexagonal bolt (14) is threadedly connected to the middle part of the top of the fixed circular ring sleeve (13), the left and right ends of the connecting cross bar (11) are provided with circular holes in the middle of the upper and lower sides, and the middle part of the bottom end of the hexagonal bolt (14) is threadedly connected to the inner walls of the circular holes on the left and right ends of the connecting cross bar (11), and the bottom end of the hexagonal bolt (14) is threadedly connected to the middle of the bottom ends of the left and right sides of the fixed circular ring sleeve (13).

5. The greenhouse assembly with a quick-disassembly structure according to claim 1, characterized in that: The front and rear sides of the ceiling connecting rod rotating shaft (3) are both bearing-connected to the middle part of the upper end of the greenhouse support (1), and the middle part of the ceiling connecting rod rotating shaft (3) is rotatably connected with a snap-fit ​​sleeve, and the bottom end of the ceiling connecting rod body (8) is snap-fitted to the inner wall of the snap-fit ​​sleeve, the top end of the ceiling connecting rod body (8) is slidably connected to the inner wall of the connecting block rotating shaft (12), and the upper and lower ends of the ceiling connecting rod body (8) are smaller than the middle cross-sectional diameter of the ceiling connecting rod body (8).

6. The greenhouse assembly with a quick-disassembly structure according to claim 1, characterized in that: The middle parts of the front and rear ends of the connecting block rotating shaft (12) are bearing-connected to the front and rear sides of the inner wall of the ceiling connecting block (9), and a clamping ring is fixed to the middle part of one side of the ceiling connecting block (9) close to the ceiling telescopic threaded rod (10), and a hexagonal bolt (14) is threadedly connected through the middle part of the upper end of the clamping ring, and the outer ring surfaces of the front and rear ends of the ceiling telescopic threaded rod (10) are slidably connected to the inner wall of the clamping ring on the surface of the ceiling connecting block (9), and the middle parts of the hexagonal bolts (14) are threadedly connected to the inner wall of the middle groove of the front and rear ends of the ceiling telescopic threaded rod (10), and the middle parts of the ceiling telescopic threaded rod (10) are threadedly connected to each other through a threaded rotating sleeve.

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