A mounting structure for base station frequency measurement equipment based on FAS

Abstract

The utility model belongs to the technical field of measuring equipment installation, specifically, is an installation structure for base station frequency measuring equipment based on FAS, comprising a measuring equipment body, a fixed base is arranged at the upper position of the measuring equipment body, a connecting base is fixed at the lower end of the fixed base, and a connecting groove is opened at the position of the measuring equipment body corresponding to the connecting base; through the structural design of the limiting component, when the measuring equipment body is installed, the connecting base fixed to the measuring equipment body can be installed to the inner side of the fixed base through the connecting groove, and then the limiting of the connecting base can be completed by moving the limiting block to the inner side of the limiting hole, thereby completing the limiting installation of the measuring equipment body fixed to the connecting base, and the measuring equipment body can be installed and fixed without multiple bolts during installation, which effectively improves the work efficiency of the installation and reduces the labor intensity of the workers.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring equipment installation, in particular to an installation structure for base station frequency measuring equipment based on FAS. Background Art

[0002] Base station frequency measurement equipment (or base station frequency analyzer) is a device used to measure and analyze the frequency of radio frequency (RF) signals used in wireless communication base stations. These devices are often used in the planning, optimization, troubleshooting and maintenance of wireless communication networks.

[0003] In order to ensure the normal operation of the base station, the user unit will regularly use the FAS-based base station frequency measurement equipment to measure the frequency of the base station to ensure that it is within the normal range. The measuring equipment needs to be installed and fixed when in use.

[0004] At present, base station frequency measurement equipment is generally fixed only by bolts, which has poor fixing effect and requires repeated operation of multiple bolts, which is relatively cumbersome. Therefore, in view of the above problems, an installation structure for base station frequency measurement equipment based on FAS is proposed. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the utility model proposes an installation structure for a base station frequency measurement device based on FAS.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model is a mounting structure for base station frequency measurement equipment based on FAS, including a measurement equipment body, a fixed base is arranged at the upper position of the measurement equipment body, a connecting seat is fixed at the lower end of the fixed base, a connecting groove is provided at a position of the measurement equipment body corresponding to the connecting seat, the connecting seat is connected to the measurement equipment body through the connecting groove, a plurality of limiting holes are evenly provided on the inner sides of both ends of the connecting seat, and a limiting component is provided at the inner side of the measurement equipment body and at a position corresponding to the limiting holes;

[0007] The limiting assembly includes a transmission rod, which is vertically arranged at an inner position of a measuring device body, the transmission rod is rotatably connected to the measuring device body, and a built-in threaded sleeve is horizontally rotated at a position inside the measuring device body and corresponding to the transmission rod, and the inner sides of both ends of the built-in threaded sleeve are threadedly connected with a transmission screw, the transmission rod is connected to the built-in threaded sleeve through a transmission assembly, and a movable plate is fixed at one end of the transmission screw away from the built-in threaded sleeve, the movable plate is slidably connected to the measuring device body, and a connecting plate is connected to the connecting plate through a telescopic assembly on a side of the movable plate away from the transmission screw, and the connecting plate is slidably connected to the measuring device body, and a plurality of limit blocks are fixed on one side of the connecting plate away from the movable plate, and the limit blocks are plug-connected with the connecting seat through a limit hole, and the limit blocks are slidably connected to the measuring device body, and the end of the transmission rod away from the built-in threaded sleeve extends to the outside of the measuring device body, and a rotation assembly is provided at one end of the transmission rod located on the outside of the measuring device body.

[0008] Preferably, the transmission assembly includes a transmission worm, which is arranged at one end of a transmission rod close to a built-in threaded sleeve, the transmission worm is fixedly connected to the transmission rod, a transmission turbine is fixed at a position corresponding to the built-in threaded sleeve and the transmission worm, and the transmission turbine is meshingly connected to the transmission worm.

[0009] Preferably, the telescopic assembly includes a fixed rod, which is fixed at a side position of the movable plate close to the connecting plate, and the inner side of one end of the fixed rod away from the connecting plate is slidably connected to a connecting rod, and the end of the connecting rod located on the inner side of the fixed rod is fixed with a first anti-slip block, the first anti-slip block is slidably connected to the fixed rod, and the other end of the connecting rod is fixedly connected to the connecting plate.

[0010] Preferably, a first spring is provided inside the fixed rod and between the first anti-slip block and the movable plate.

[0011] Preferably, the rotating assembly includes a connecting cylinder, which is arranged at one end of the transmission rod located outside the measuring equipment body, the connecting cylinder is slidably connected to the transmission rod, a driving knob is fixed to the end of the connecting cylinder away from the transmission rod, and a plurality of plug-in assemblies are arranged on the inner side of the connecting cylinder.

[0012] Preferably, the plug-in assembly includes a second spring, which is arranged at an inner position of the connecting cylinder, one end of the second spring away from the transmission rod is fixedly connected to the connecting cylinder, the other end of the second spring is fixed with a second anti-detachment block, the second anti-detachment block is slidably connected to the connecting cylinder, and the end of the second anti-detachment block away from the second spring is fixed with a plug-in block, a plug-in groove is provided at a position of the transmission rod corresponding to the plug-in block, and the plug-in block is plug-connected to the transmission rod through the plug-in groove.

[0013] Preferably, an anti-drop plate is fixed to one end of the transmission rod located inside the connecting tube, and the anti-drop plate is slidably connected to the connecting tube.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides an installation structure for base station frequency measuring equipment based on FAS. Through the structural design of the limit assembly, when the measuring equipment body is installed, the connecting seat fixed to the measuring equipment body can be installed to the inner side of the fixed base through the connecting groove, and then the connecting seat can be limited by moving the limit block to the inner side of the limit hole, thereby completing the limit installation of the measuring equipment body fixed to the connecting seat. During installation, the measuring equipment body can be installed and fixed without multiple bolts, which effectively improves the work efficiency of the installation and reduces the labor intensity of the workers.

[0016] The utility model provides an installation structure for base station frequency measuring equipment based on FAS. Through the structural design of the rotating assembly, after the measuring equipment body is installed, it can effectively avoid the transmission rod from rotating due to external force, thereby causing the limit block to move and making it impossible to limit the connecting seat, thereby improving the stability of the device and enhancing the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is a three-dimensional diagram of the connecting seat in the utility model;

[0020] Figure 3 It is a three-dimensional diagram of the position limiting assembly in the utility model;

[0021] Figure 4 This utility model Figure 3 The enlarged view of point A in the middle;

[0022] Figure 5 It is a stereogram of the telescopic assembly in the utility model;

[0023] Figure 6 It is a three-dimensional diagram of the anti-slip plate in the utility model;

[0024] Figure 7 It is a stereogram of the plug-in assembly in the utility model.

[0025] Legend:

[0026] 1. Measuring device body; 2. Fixed base; 3. Connecting seat; 4. Connecting slot; 5. Limit block; 6. Limit hole; 7. Connecting plate; 8. Moving plate; 9. Transmission screw; 10. Built-in threaded sleeve; 11. Transmission rod; 12. Connecting tube; 13. Driving knob; 14. Transmission turbine; 15. Transmission worm; 16. Fixed rod; 17. First spring; 18. First anti-dropping block; 19. Connecting rod; 20. Second spring; 21. Second anti-dropping block; 22. Plug-in block; 23. Plug-in slot; 24. Anti-dropping plate. DETAILED DESCRIPTION

[0027] 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 technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Specific examples are given below.

[0029] See also Figure 1-Figure 7 The utility model provides a mounting structure for a base station frequency measuring device based on FAS, comprising a measuring device body 1, a fixed base 2 is arranged at the upper position of the measuring device body 1, a connecting seat 3 is fixed at the lower end of the fixed base 2, a connecting groove 4 is provided at a position corresponding to the connecting seat 3 of the measuring device body 1, the connecting seat 3 is connected to the measuring device body 1 through the connecting groove 4, a plurality of limiting holes 6 are evenly provided on the inner sides of both ends of the connecting seat 3, and a limiting component is provided at a position corresponding to the limiting hole 6 on the inner side of the measuring device body 1;

[0030] The limit assembly includes a transmission rod 11, which is vertically arranged at the inner side of the measuring device body 1. The transmission rod 11 is rotatably connected to the measuring device body 1. A built-in threaded sleeve 10 is rotatably arranged at a position corresponding to the transmission rod 11 on the inner side of the measuring device body 1. The inner sides of both ends of the built-in threaded sleeve 10 are threadedly connected with a transmission screw 9. The transmission rod 11 is connected to the built-in threaded sleeve 10 through a transmission assembly. A movable plate 8 is fixed to one end of the transmission screw 9 away from the built-in threaded sleeve 10. The movable plate 8 is slidably connected to the measuring device body 1. The side of the moving plate 8 away from the transmission screw 9 is connected with a connecting plate 7 through a telescopic component, and the connecting plate 7 is slidably connected to the measuring device body 1. A plurality of limit blocks 5 are fixed to the side of the connecting plate 7 away from the moving plate 8. The limit blocks 5 are plug-connected with the connecting seat 3 through the limit holes 6. The limit blocks 5 are slidably connected to the measuring device body 1. The end of the transmission rod 11 away from the built-in threaded sleeve 10 extends to the outside of the measuring device body 1. The end of the transmission rod 11 located on the outside of the measuring device body 1 is provided with a rotating component; when working, when the measuring device body 1 needs to be installed When the connecting seat 3 is moved, the limiting block 5 can be squeezed, so that the limiting block 5 drives the connecting plate 7 to move in the direction close to the movable plate 8 through the telescopic assembly. When the connecting seat 3 moves to the position corresponding to the limiting hole 6 and the limiting block 5, the connecting plate 7 is pushed in the direction close to the connecting seat 3 by the telescopic assembly. When the limiting block 5 moves to the inner side of the limiting hole 6, the plug-in connection of the connecting seat 3 can be completed, thereby completing the limiting work of the connecting seat 3. When disassembling, the transmission rod 11 is rotated by the rotating assembly, and the rotation of the transmission rod 11 drives the built-in threaded sleeve 10 to rotate through the transmission assembly, thereby driving the movable plate 8 to move in the direction close to the transmission rod 11 through the transmission screw 9 threadedly connected thereto, thereby driving the limiting block 5 to move in the direction away from the limiting hole 6, and then canceling the limiting of the connecting seat 3, the measuring device body 1 can be taken out. This step can install and fix the measuring device body 1 without using multiple bolts during installation, effectively improving the installation work efficiency and reducing the labor intensity of the workers.

[0031] Further, such as Figure 4As shown, the transmission assembly includes a transmission worm 15, which is arranged at one end of the transmission rod 11 close to the internal threaded sleeve 10, and the transmission worm 15 is fixedly connected to the transmission rod 11. A transmission turbine 14 is fixed at a position of the internal threaded sleeve 10 corresponding to the transmission worm 15, and the transmission turbine 14 is meshedly connected to the transmission worm 15. During operation, when the transmission rod 11 rotates, the transmission worm 15 fixedly connected thereto is driven to rotate at the same time, so that when the transmission worm 15 rotates, the internal threaded sleeve 10 is driven to rotate through the transmission turbine 14 meshed therewith. This step can effectively provide a power source for the rotation of the internal threaded sleeve 10, facilitate the rotation of the internal threaded sleeve 10, and prevent the internal threaded sleeve 10 from self-rotating, thereby reducing the limiting effect.

[0032] Further, such as Figure 5 As shown, the telescopic assembly includes a fixed rod 16, which is fixed to a side position of the mobile plate 8 close to the connecting plate 7, and a connecting rod 19 is slidably connected to the inner side of one end of the fixed rod 16 away from the connecting plate 7, and a first anti-dropping block 18 is fixed to one end of the connecting rod 19 located inside the fixed rod 16, and the first anti-dropping block 18 is slidably connected to the fixed rod 16, and the other end of the connecting rod 19 is fixedly connected to the connecting plate 7. During operation, when the connecting plate 7 moves, since the mobile plate 8 does not move, the connecting plate 7 drives the connecting rod 19 to move in a direction close to the mobile plate 8. This step can ensure that when the connecting seat 3 squeezes the limit block 5, the limit block 5 can move under the premise that the mobile plate 8 does not move.

[0033] like Figure 5 As shown, a first spring 17 is provided inside the fixing rod 16 and between the first anti-slip block 18 and the movable plate 8. During operation, when the connecting rod 19 moves, the connecting rod 19 squeezes the first spring 17 through the first anti-slip block 18, and when the limit block 5 moves to a position corresponding to the limit hole 6, the connecting rod 19 is pushed toward the limit block 5 under the elastic action of the first spring 17. This step can effectively ensure that the elastic action of the first spring 17 during installation can automatically limit and fix the connecting seat 3 when it moves to a suitable position, thereby effectively improving the work efficiency of the installation.

[0034] like Figure 6 and Figure 7As shown, the rotating assembly includes a connecting tube 12, which is arranged at one end of the transmission rod 11 outside the measuring device body 1, and the connecting tube 12 is slidably connected to the transmission rod 11. A driving knob 13 is fixed to one end of the connecting tube 12 away from the transmission rod 11, and a plurality of plug-in assemblies are arranged inside the connecting tube 12. During operation, when it is necessary to take out the fixed base 2 and the connecting seat 3 from the inside of the measuring device body 1, firstly, the driving knob 13 is pulled outward so that the driving knob 13 drives the connecting tube 12 to move. When the connecting tube 12 moves to the point where the plug-in assembly is connected to the transmission rod 11, the driving knob 13 is rotated so that the driving knob 13 can drive the transmission rod 11 to rotate. This step can effectively prevent the transmission rod 11 from rotating due to external force, thereby causing the limit block 5 to move and fail to limit the connection seat 3, thereby improving the stability of the device and the practicality of the device.

[0035] like Figure 6 Shown and Figure 7 The plug-in assembly includes a second spring 20, which is arranged at the inner side of the connecting tube 12. One end of the second spring 20 away from the transmission rod 11 is fixedly connected to the connecting tube 12. A second anti-dropout block 21 is fixed to the other end of the second spring 20. The second anti-dropout block 21 is slidably connected to the connecting tube 12. A plug-in block 22 is fixed to one end of the second anti-dropout block 21 away from the second spring 20. A plug-in groove 23 is provided at the position corresponding to the transmission rod 11 and the plug-in block 22. The plug-in block 22 is plug-connected to the transmission rod 11 through the plug-in groove 23. During operation, when the connecting tube 12 moves, the plug-in block 22 is driven to move at the same time. When the plug-in block 22 moves to a position corresponding to the plug-in slot 23, the second anti-dropping block 21 and the plug-in block 22 are pushed toward the plug-in slot 23 under the elastic action of the second spring 20, thereby completing the plug-in connection between the plug-in block 22 and the transmission rod 11. Subsequently, by rotating the driving knob 13, the driving knob 13 can drive the transmission rod 11 to rotate. This step can be achieved by horizontally moving the connecting tube 12 when the transmission rod 11 needs to rotate, so that when the connecting tube 12 rotates, it can simultaneously drive the transmission rod 11 to move.

[0036] like Figure 6 Shown and Figure 7 , an anti-drop plate 24 is fixed to one end of the transmission rod 11 located inside the connecting tube 12, and the anti-drop plate 24 is slidably connected to the connecting tube 12. During operation, when the connecting tube 12 moves, the anti-drop plate 24 slides inside the connecting tube 12, and this step can effectively prevent the connecting tube 12 from detaching from the outside.

[0037] Working principle: During operation, when the measuring device body 1 needs to be installed, first place the connecting seat 3 on the inner side of the measuring device body 1 through the connecting groove 4. When the connecting seat 3 moves, it can squeeze the limit block 5, so that the limit block 5 drives the connecting plate 7 to move in the direction close to the movable plate 8 through the telescopic assembly. When the connecting seat 3 moves to the position corresponding to the limit hole 6 and the limit block 5, the connecting plate 7 is pushed in the direction close to the connecting seat 3 through the telescopic assembly. When the limit block 5 moves to the inside of the limit hole 6, the plug-in connection of the connecting seat 3 can be completed, thereby completing the limiting work of the connecting seat 3. When disassembling, the transmission rod 11 is rotated by the rotating assembly. The rotation of the transmission rod 11 drives the built-in threaded sleeve 10 to rotate through the transmission assembly, thereby driving the movable plate 8 to move in the direction close to the transmission rod 11 through the transmission screw 9 threadedly connected thereto, thereby driving the limit block 5 to move in the direction away from the limit hole 6, thereby canceling the connection to the connecting seat 3. When the transmission rod 11 rotates, it drives the transmission worm 15 fixedly connected thereto to rotate at the same time, so that when the transmission worm 15 rotates, the transmission turbine 14 meshing with it drives the built-in threaded sleeve 10 to rotate. This step can effectively provide a power source for the rotation of the built-in threaded sleeve 10, facilitate the rotation of the built-in threaded sleeve 10, and avoid the self-rotation of the built-in threaded sleeve 10, thereby reducing the limiting effect. When the connecting plate 7 moves, the moving plate 8 does not move, so that the connecting plate 7 drives the connecting rod 19 to move in the direction close to the moving plate 8. This step can ensure that when the connecting seat 3 squeezes the limit block 5, the limit block 5 can be moved under the premise that the moving plate 8 does not move. During operation, when the connecting rod 19 moves, the connecting rod 19 squeezes the first spring 17 through the first anti-slip block 18. When the limit block 5 moves to the position corresponding to the limit hole 6, the connecting rod 19 is pushed toward the limit block 5 under the elastic action of the first spring 17. This step can effectively ensure that the elastic action of the first spring 17 during installation can automatically limit and fix the connecting seat 3 when it moves to a suitable position, effectively improving the installation efficiency. During operation, when it is necessary to remove the fixed base 2 and the connecting seat 3 from the inner side of the measuring device body 1, first pull the driving knob 13 outward so that the driving knob 13 drives the connecting cylinder 12 to move. When the connecting cylinder 12 moves to the plug-in assembly and connects with the transmission rod 11, the driving knob 13 is rotated so that the driving knob 13 can drive the transmission rod 11 to rotate. This step can effectively avoid the transmission rod 11 from rotating due to external force, thereby causing the limit block 5 to move and causing the connection seat 3 to be unable to be limited, thereby improving the stability of the device and the practicality of the device.During operation, when the connecting tube 12 moves, the plug-in block 22 is driven to move at the same time. When the plug-in block 22 moves to the position corresponding to the plug-in slot 23, the second anti-slip block 21 and the plug-in block 22 are pushed toward the plug-in slot 23 under the elastic action of the second spring 20, thereby completing the plug-in connection between the plug-in block 22 and the transmission rod 11. Then, by rotating the driving knob 13, the driving knob 13 can drive the transmission rod 11 to rotate. This step can be performed by horizontally moving the connecting tube 12 when the transmission rod 11 needs to rotate, so that the connecting tube 12 can simultaneously drive the transmission rod 11 to move when the connecting tube 12 rotates. During operation, when the connecting tube 12 moves, the anti-slip plate 24 slides on the inner side of the connecting tube 12. This step can effectively prevent the connecting tube 12 from detaching from the outside.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A mounting structure for a base station frequency measurement device based on FAS, comprising a measurement device body (1), characterized in that: A fixed base (2) is provided at an upper position of the measuring device body (1), a connecting base (3) is fixed at a lower end of the fixed base (2), a connecting groove (4) is provided at a position of the measuring device body (1) corresponding to the connecting base (3), the connecting base (3) is connected to the measuring device body (1) via the connecting groove (4), a plurality of limiting holes (6) are evenly provided on the inner sides of both ends of the connecting base (3), and a limiting component is provided at a position on the inner side of the measuring device body (1) corresponding to the limiting holes (6); The limit assembly comprises a transmission rod (11), the transmission rod (11) being vertically arranged at an inner position of the measuring device body (1), the transmission rod (11) being rotatably connected to the measuring device body (1), a built-in threaded sleeve (10) being rotatably arranged at a position inside the measuring device body (1) and corresponding to the transmission rod (11), the inner sides of both ends of the built-in threaded sleeve (10) being threadedly connected to transmission screws (9), the transmission rod (11) being connected to the built-in threaded sleeve (10) via a transmission assembly, a movable plate (8) being fixed to one end of the transmission screw (9) away from the built-in threaded sleeve (10), the movable plate (8) being slidably connected to the measuring device body (1), the movable plate (8) being away from the transmission screw One side of the rod (9) is connected to a connecting plate (7) via a telescopic assembly, the connecting plate (7) is slidably connected to a measuring device body (1), a plurality of limit blocks (5) are fixed to a side of the connecting plate (7) away from the movable plate (8), the limit blocks (5) are plug-connected to a connecting seat (3) via limit holes (6), the limit blocks (5) are slidably connected to the measuring device body (1), one end of the transmission rod (11) away from the built-in threaded sleeve (10) extends to the outside of the measuring device body (1), and a rotating assembly is provided at one end of the transmission rod (11) located outside the measuring device body (1).

2. The installation structure for base station frequency measurement equipment based on FAS as claimed in claim 1, characterized in that: The transmission assembly comprises a transmission worm (15), the transmission worm (15) being arranged at one end of a transmission rod (11) close to an internally threaded sleeve (10), the transmission worm (15) being fixedly connected to the transmission rod (11), a transmission turbine (14) being fixedly connected to a position of the internally threaded sleeve (10) corresponding to the transmission worm (15), and the transmission turbine (14) being meshingly connected to the transmission worm (15).

3. The installation structure for base station frequency measurement equipment based on FAS as claimed in claim 1, characterized in that: The telescopic assembly comprises a fixed rod (16), the fixed rod (16) being fixed to a side position of the movable plate (8) close to the connecting plate (7), the inner side of one end of the fixed rod (16) away from the connecting plate (7) being slidably connected to a connecting rod (19), the end of the connecting rod (19) located inside the fixed rod (16) being fixed to a first anti-slip block (18), the first anti-slip block (18) being slidably connected to the fixed rod (16), and the other end of the connecting rod (19) being fixedly connected to the connecting plate (7).

4. The installation structure for base station frequency measurement equipment based on FAS as claimed in claim 3, characterized in that: A first spring (17) is provided inside the fixed rod (16) and at a position between the first anti-slip block (18) and the movable plate (8).

5. The installation structure for base station frequency measurement equipment based on FAS as claimed in claim 1, characterized in that: The rotating assembly comprises a connecting cylinder (12), the connecting cylinder (12) being arranged at one end of a transmission rod (11) located outside a measuring device body (1), the connecting cylinder (12) being slidably connected to the transmission rod (11), a driving knob (13) being fixed to one end of the connecting cylinder (12) away from the transmission rod (11), and a plurality of plug-in assemblies being arranged inside the connecting cylinder (12).

6. The installation structure for base station frequency measurement equipment based on FAS as claimed in claim 5, characterized in that: The plug-in assembly comprises a second spring (20), the second spring (20) being arranged at an inner side position of the connecting cylinder (12), one end of the second spring (20) away from the transmission rod (11) being fixedly connected to the connecting cylinder (12), a second anti-slip block (21) being fixedly connected to the other end of the second spring (20), the second anti-slip block (21) being slidably connected to the connecting cylinder (12), a plug-in block (22) being fixedly connected to one end of the second anti-slip block (21) away from the second spring (20), a plug-in slot (23) being provided at a position of the transmission rod (11) corresponding to the plug-in block (22), and the plug-in block (22) being plug-connected to the transmission rod (11) via the plug-in slot (23).

7. The installation structure for base station frequency measurement equipment based on FAS as claimed in claim 5, characterized in that: An anti-slip plate (24) is fixed to one end of the transmission rod (11) located inside the connecting tube (12), and the anti-slip plate (24) is slidably connected to the connecting tube (12).

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