Lifting platform for municipal engineering construction

Abstract

The invention provides a lifting platform for municipal engineering construction, and relates to the field of municipal engineering construction equipment, the lifting platform comprises a support, an upper base and a lower base, the upper base and the support are connected through a supporting rod, one end of the supporting rod is hinged to the side face of the upper base, the other end of the supporting rod is slidably connected to the side face of the support, and a telescopic mechanism is arranged between the upper base and the lower base; comprising a driving assembly and a telescopic assembly, the driving assembly enables an upper base and a lower base to ascend and descend relatively through the telescopic assembly, movable pins are arranged on the sides, close to a support, of the upper base and the lower base, and pin holes are formed in the corresponding support. When the upper base is fixed through the movable pin and the support, the telescopic mechanism drives the lower base to descend, and the device is used for suspension bridge operation and has two purposes, the utilization rate and applicability of the device are improved, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of municipal engineering construction equipment, in particular to a lifting platform for municipal engineering construction. Background Art

[0002] Municipal engineering refers to various construction activities that provide paid or free public products and services to residents within the planning and construction areas of cities and towns (villages) based on government responsibilities and obligations. These activities mainly include the construction and maintenance of urban infrastructure, such as roads, bridges, subways, water supply and drainage systems, sewage treatment facilities, urban flood control facilities, landscaping, street lights, and environmental sanitation.

[0003] That is, in municipal engineering, both high-altitude operations and suspension bridge operations are required, but currently there are only single-function lifting platforms on the market. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a lifting platform for municipal engineering construction, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a lifting platform for municipal engineering construction: including a bracket, an upper base, and a lower base, the upper base and the bracket are connected by a support rod, one end of the support rod is hinged to the side of the upper base, and the other end of the support rod is slidably connected to the side of the bracket, a telescopic mechanism is arranged between the upper base and the lower base, including a driving assembly and a telescopic assembly, the driving assembly makes the upper base and the lower base rise and fall relative to each other through the telescopic assembly, and the upper base and the lower base are provided with movable pins close to the side of the bracket, and the corresponding pin holes are arranged on the bracket.

[0008] Preferably, vertical slide grooves are provided on both sides of the bracket, and one end of the support rod is slidably connected in the vertical slide groove.

[0009] Preferably, a locking mechanism is provided between the bracket and the support rod, and the locking mechanism includes a group of saw teeth, a group of telescopic teeth, a spring, an elliptical wheel, a rotating shaft, and a locking motor, a group of the saw teeth are arranged on the side of the bracket, a group of the telescopic teeth are arranged on the support rod and connected to one end of the bracket, the elliptical wheel is arranged in the middle of a group of telescopic teeth, the locking motor is arranged on the support rod, the output end of the locking motor is connected to the center of the elliptical wheel, and the spring is connected between the telescopic teeth and the support rod.

[0010] Preferably, the telescopic assembly is a scissors-link group, the driving assembly is an electric telescopic rod, a transverse sliding groove is provided at the lower end of the upper base and the upper end of the lower base, a side connecting rod at the upper end and the lower end of the scissors-link group is slidably connected in the transverse sliding groove, and the electric telescopic rod is connected to the connecting rod sliding in the transverse sliding groove.

[0011] Preferably, a rotating disk is provided at the lower end of the bracket, one end of the rotating disk is rotatably connected to the plane of the moving vehicle, a rotating motor is provided on the moving vehicle, the bottom end of the output shaft of the rotating motor is rotatably connected to the plane of the moving vehicle, and one end of the rotating disk is fixedly connected to the output shaft of the rotating motor.

[0012] Preferably, a lifting mechanism is also provided in the bracket, and the lifting mechanism includes a top plate, a screw, a guide rod, a slider, and a lifting motor. The screw is rotatably connected between the top plate and the rotating disk, the guide rod is connected between the top plate and the rotating disk, the lifting motor is fixed to the bottom end of the rotating disk, the output end of the lifting motor is connected to the screw, the slider is engaged with the screw, the slider is connected to the bracket, and the other end of the bracket is slidably connected to the guide rod.

[0013] Preferably, the upper fence is raised or lowered on the upper base plate by a connecting rod.

[0014] Preferably, the lower base plate is hollow, the lower fence is telescopically connected to the lower base plate, and the lower end of the lower fence is connected to the bottom plate.

[0015] Preferably, a fixing mechanism is arranged on the rotating disk, and the fixing mechanism comprises a rotating rod, and the outer end of the rotating rod is threadedly connected to the fixing rod.

[0016] (III) Beneficial effects

[0017] The present invention provides a lifting platform for municipal engineering construction, which has the following beneficial effects:

[0018] 1. The lifting platform for municipal engineering construction includes a bracket, an upper base and a lower base. The upper base and the bracket are connected by a support rod, one end of the support rod is hinged to the side of the upper base, and the other end of the support rod is slidably connected to the side of the bracket. A telescopic mechanism is arranged between the upper base and the lower base, including a driving assembly and a telescopic assembly. The driving assembly makes the upper base and the lower base rise and fall relatively through the telescopic assembly. The upper base and the lower base are provided with movable pins on one side close to the bracket, and pin holes are arranged on the corresponding brackets. When the lower base is fixed with the movable pin and the bracket, the telescopic mechanism drives the upper base to rise, which can be used for climbing operations. When the upper base is fixed with the movable pin and the bracket, the telescopic mechanism drives the lower base to descend, which is used for suspension bridge operations. One machine has two uses, which improves the utilization rate and applicability of the equipment and reduces costs.

[0019] 2. The lifting platform for municipal engineering construction is also provided with a lifting mechanism in the bracket. The lifting mechanism includes a top plate, a screw, a guide rod, a slider, and a lifting motor. The screw is rotatably connected between the top plate and the rotating disk, the guide rod is connected between the top plate and the rotating disk, the lifting motor is fixed at the bottom of the rotating disk, the output end of the lifting motor is connected to the screw, the slider is engaged with the screw, the slider is connected to the bracket, and the other end of the bracket is slidably connected to the guide rod, thereby realizing two-level lifting and increasing the lifting stroke of the lifting platform.

[0020] 3. The lifting platform for municipal engineering construction has a rotating disk at the lower end of the bracket, one end of the rotating disk is rotatably connected to the plane of the mobile vehicle, and the mobile vehicle is provided with a rotating motor. The bottom end of the output shaft of the rotating motor is rotatably connected to the plane of the mobile vehicle, and one end of the rotating disk is fixedly connected to the output shaft of the rotating motor, so that the lifting platform can be facing the front or the side relative to the mobile vehicle, which is beneficial for use in suspension bridge operations. The operating height of the suspension bridge remains unchanged, and the mobile vehicle moves along the bridge, thereby improving operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the initial state structure of a lifting platform for municipal engineering construction of the present invention Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the initial state structure of a lifting platform for municipal engineering construction of the present invention Figure 2 ;

[0023] Figure 3 It is a schematic diagram of the side view of the initial state of a lifting platform for municipal engineering construction of the present invention;

[0024] Figure 4 This is a schematic diagram of the locking mechanism structure of a lifting platform for municipal engineering construction according to the present invention;

[0025] Figure 5 This is a schematic diagram of a lifting platform for municipal engineering construction climbing operation structure of the present invention Figure 1 ;

[0026] Figure 6 This is a schematic diagram of a lifting platform for municipal engineering construction climbing operation structure of the present invention Figure 2 ;

[0027] Figure 7 This is a schematic diagram of the structure of a lifting platform suspension bridge for municipal engineering construction in the operating state of the present invention;

[0028] Figure 8 This is a schematic diagram of the lateral state structure of a lifting platform mobile vehicle for municipal engineering construction according to the present invention;

[0029] Fig. 9This is a schematic diagram of the transverse suspension bridge operation structure of a lifting platform mobile vehicle for municipal engineering construction according to the present invention;

[0030] Fig.10 This is a schematic diagram of the structure of a lifting mechanism of a lifting platform for municipal engineering construction according to the present invention;

[0031] Fig.11 This is a schematic diagram of a fence structure on a lifting platform for municipal engineering construction according to the present invention;

[0032] Fig.12 The present invention is a schematic diagram of a fence structure under a lifting platform for municipal engineering construction.

[0033] In the figure: 1. bracket; 2. upper base; 3. lower base; 4. support rod; 5. movable pin; 6. pin hole; 7. vertical slide; 8. sawtooth; 9. telescopic tooth; 10. spring; 11. elliptical wheel; 12. rotating shaft; 13. locking motor; 14. scissor connecting rod group; 15. electric telescopic rod; 16. horizontal slide; 17. rotating disk; 18. moving car; 19. rotating motor; 20. top plate; 21. screw; 22. guide rod; 23. slider; 24. lifting motor; 25. upper fence; 26. connecting rod; 27. lower fence; 28. bottom plate; 29. ​​rotating rod; 30. fixed rod; 31. bridge. DETAILED DESCRIPTION

[0034] The embodiment of the present invention provides a lifting platform for municipal engineering construction, such as Figure 1-11 The support rod 4 is connected to the upper base 2 and the lower base 3 by a support rod 4, one end of the support rod 4 is hinged on the side of the upper base 2, and the other end of the support rod 4 is slidably connected to the side of the support 1. A telescopic mechanism is arranged between the upper base 2 and the lower base 3, including a driving component and a telescopic component. The driving component makes the upper base 2 and the lower base 3 rise and fall relatively through the telescopic component. The upper base 2 and the lower base 3 are provided with movable pins 5 on one side close to the support 1, and pin holes 6 are arranged on the corresponding support 1. When the lower base 3 is fixed to the support 1 by the movable pin 5, the driving component drives the telescopic component to drive the upper base 2 to rise. The operator stands on the upper base 2, which can be used for climbing operations. When the upper base 2 is fixed to the support 1 by the movable pin 5, the driving component drives the telescopic component to drive the lower base 3 to rise and fall. The operator stands on the lower base 3 or on the bottom plate 28 arranged on the lower base 3 to perform suspension bridge operations. One machine has two uses, which improves the utilization rate and applicability of the equipment and reduces the cost.

[0035] like Figure 1-3 As shown, vertical slide grooves 7 are provided on both sides of the bracket 1, and one end of the support rod 4 is slidably connected in the vertical slide groove 7, so that the support rod 4 can also be well connected to the upper base 2 and the bracket 1 when the lifting platform is raised or lowered;

[0036] In order to stabilize the upper base 2 during the lifting operation, the support rod 4 plays a good role in stabilizing the upper base 2. Figure 4 As shown, a locking mechanism is arranged between the bracket 1 and the support rod 4, and the locking mechanism includes a group of saw teeth 8, a group of telescopic teeth 9, a spring 10, an elliptical wheel 11, a rotating shaft 12, and a locking motor 13. A group of saw teeth 8 is arranged on the side of the bracket 1, a group of telescopic teeth 9 is arranged on the support rod 4 connected to one end of the bracket 1, the elliptical wheel 11 is arranged in the middle of a group of telescopic teeth 9, the locking motor 13 is arranged on the support rod 4, the output end of the locking motor 13 is connected to the center of the elliptical wheel 11, and the spring 10 is connected between the telescopic teeth 9 and the support rod 4.

[0037] The operating principle of the above-mentioned locking mechanism is: when the locking motor 13 rotates to make the long diameter of the elliptical wheel 11 in a horizontal state, the telescopic teeth 9 on both sides are pushed out to both sides, and the telescopic teeth 9 are thereby stuck in the serrations 8, and the support rod 4 is fixed. The support rod 4 plays a good supporting role for the lifting platform. When unlocking is required, the locking motor 13 is rotated again to make the long diameter of the elliptical wheel 11 in a vertical state. Under the elastic force of the spring 10, the telescopic teeth 9 on both sides are retracted inward, and the telescopic teeth 9 are disengaged from the serrations 8, thereby unlocking.

[0038] There are many forms of telescopic components. In the embodiment of this case, the telescopic component is a scissors-link group 14, and the driving component is an electric telescopic rod 15. A transverse slide groove 16 is provided at the lower end of the upper base 2 and the upper end of the lower base 3. The connecting rods on one side of the upper and lower ends of the scissors-link group 14 are slidably connected in the transverse slide groove 16, and the electric telescopic rod 15 is connected to the connecting rod sliding in the transverse slide groove 16.

[0039] Working principle of the telescopic assembly: When the electric telescopic rod 15 pulls the connecting rod of the scissor connecting rod assembly 14 inward in the transverse slide groove 16, the scissor connecting rod assembly 14 extends, such as Figure 6 As shown, the extension between the upper base 2 and the lower base 3 is achieved, and vice versa. Figure 3 As shown, when the electric telescopic rod 15 moves the connecting rod of the scissor connecting rod assembly 14 outward toward the transverse sliding groove 16, the scissor connecting rod assembly 14 contracts, and the distance between the upper base 2 and the lower base 3 is shortened.

[0040] like Figure 1 , 8 As shown in Figure 9, preferably, a rotating disk 17 is provided at the lower end of the bracket 1, one end of the rotating disk 17 is rotatably connected to the plane of the mobile vehicle 18, and a rotating motor 19 is provided on the mobile vehicle 18. The bottom end of the output shaft of the rotating motor 19 is rotatably connected to the plane of the mobile vehicle 18, and one end of the rotating disk 17 is fixedly connected to the output shaft of the rotating motor 19. The rotating connection of the rotating disk 17 to the mobile vehicle 18 increases the mobility of the mobile vehicle 18, so that the lifting platform can adapt to more scenarios, such as Figure 8 , 9In the applicable scenario shown on the bridge 31, the mobile vehicle 18 can move on the bridge 31 and realize the suspension bridge operation all the way.

[0041] In order to increase the height of the trip, such as Fig.10 As shown, a lifting mechanism is also provided in the bracket 1, and the lifting mechanism includes a top plate 20, a screw 21, a guide rod 22, a slider 23, and a lifting motor 24. The screw 21 is rotatably connected between the top plate 20 and the rotating disk 17, the guide rod 22 is connected between the top plate 20 and the rotating disk 17, the lifting motor 24 is fixed to the bottom end of the rotating disk 17, the output end of the lifting motor 24 is connected to the screw 21, the slider 23 is engaged with the screw 21, the slider 23 is connected to the bracket 1, and the other end of the bracket 1 is slidably connected to the guide rod 22.

[0042] The working principle of the lifting mechanism is as follows: the lifting motor 24 rotates, driving the screw rod 21 to rotate, the screw rod 21 drives the slider 23 meshing therewith to move up and down, and the slider 23 drives the bracket 1 to move up and down.

[0043] like Fig.11 As shown, the upper fence 25 is raised or lowered on the upper base plate by a connecting rod 26, which is conducive to saving space and facilitating the lowering or erecting of the upper fence 25 to protect the safety of operators performing high-altitude operations. At the same time, the operator's safety belt can be tied to the upper fence 25 to further improve the safety of the operation.

[0044] like Fig.12 As shown, the lower base plate is hollow, and the lower fence 27 is telescopically connected to the lower base plate. The lower end of the lower fence 27 is connected to the bottom plate 28, which is beneficial to protecting the safety of operators when the suspension bridge is in operation. When the suspension bridge is not in use, the bottom can be folded up to save space.

[0045] like Figure 6 As shown, in order to ensure the stability of the lifting platform, a fixing mechanism can also be set on the lower base plate, and the fixing mechanism includes a rotating rod 29, and the outer end of the rotating rod 29 is threadedly connected to the fixing rod 30. By rotating the fixing rod 30, the bottom end of the fixing rod 30 is supported on the bottom surface to form a good support. At the same time, when the fixing mechanism is not in use, the rotating rod 29 can be rotated inward and retracted to save space.

[0046] Working principle: Figure 1 and 8 As shown, the lifting platform can be set on the mobile vehicle 18, and the mobile vehicle 18 drives the lifting platform to move. Since the lifting platform and the mobile vehicle 18 are connected by a rotating motor 19, as shown in FIG. Figure 1 As shown, the lifting platform can be arranged at the front end of the mobile vehicle 18, or it can be arranged as shown in FIG. Figure 8 As shown, the lifting platform is arranged on the side of the mobile vehicle 18 and is selected according to the actual application scenario;

[0047] When performing a climbing operation, the mobile vehicle 18 drives the lifting platform to the destination, such as Figure 1 The figure shows the initial state of the lifting platform. At this time, the scissor linkage group 14 is in a retracted state, the upper bottom plate and the lower bottom plate are closest, the lifting mechanism of the bracket 1 does not operate, and the bracket 1 is not raised. The operator stands on the upper bottom plate, sets up the upper fence 25, connects the safety belt to the upper fence 25, and supports the fixing mechanism set on the rotating disk 17 on the bottom surface, such as Figure 5 As shown, the lifting motor 24 is started, and the lifting motor 24 rotates, and finally drives the bracket 1 to rise upward, and the lifting platform (including the upper bottom plate, the lower bottom plate, and the telescopic mechanism) stops as the bracket 1 rises to the required height, and the operator performs related municipal engineering construction;

[0048] like Figure 5 If the height shown is not enough for construction, Figure 5 When the upper and lower plates are in the state of being ... Figure 6 shown.

[0049] When the suspension bridge is in operation, Figure 7 As shown, by Figure 3 The status of Figure 7 The state changes, the bottom plate 28 is erected, the operator stands on the bottom plate 28, the safety belt is connected to the lower fence 27, and the mobile vehicle 18 sets up the lifting platform to the side of the bridge 31, such as Figure 7 As shown, the locking mechanism of the support rod 4 is locked, the movable pin 5 of the upper base plate is inserted into the pin hole 6 of the support rod 4, the electric telescopic rod 15 is started, the scissor connecting rod group 14 is extended, the upper base plate is immobile, and the lower base plate moves downward. After it drops to a preset height, the operation is suspended, and the operator performs related suspension bridge construction;

[0050] like Fig. 9 As shown, the lifting platform can also be located on the side of the mobile vehicle 18. In this case, the lowering height of the bottom plate can be kept unchanged, and the mobile vehicle 18 can move along the bridge 31 to perform suspension bridge construction, thereby improving construction efficiency.

[0051] In summary

[0052] The lifting platform for municipal engineering construction includes a bracket 1, an upper base 2, and a lower base 3. The upper base 2 is connected to the bracket 1 by a support rod 4. One end of the support rod 4 is hinged to the side of the upper base 2, and the other end of the support rod 4 is slidably connected to the side of the bracket 1. A telescopic mechanism is arranged between the upper base 2 and the lower base 3, including a driving component and a telescopic component. The driving component makes the upper base 2 and the lower base 3 rise and fall relatively through the telescopic component. The upper base 2 and the lower base 3 are provided with movable pins 5 on the side close to the bracket 1, and the corresponding bracket 1 is provided with pin holes 6. When the lower base 3 is fixed to the bracket 1 by the movable pin 5, the telescopic mechanism drives the upper base 2 to rise, which can be used for climbing operations. When the upper base 2 is fixed to the bracket 1 by the movable pin 5, the telescopic mechanism drives the lower base 3 to descend, which is used for suspension bridge operations. One machine has two uses, which improves the utilization rate and applicability of the equipment and reduces the cost.

[0053] The lifting platform for municipal engineering construction is also provided with a lifting mechanism in the bracket 1, and the lifting mechanism includes a top plate 20, a screw 21, a guide rod 22, a slider 23, and a lifting motor 24. The screw 21 is rotatably connected between the top plate 20 and the rotating disk 17, the guide rod 22 is connected between the top plate 20 and the rotating disk 17, the lifting motor 24 is fixed to the bottom end of the rotating disk 17, the output end of the lifting motor 24 is connected to the screw 21, the slider 23 is engaged with the screw 21, the slider 23 is connected to the bracket 1, and the other end of the bracket 1 is slidably connected to the guide rod 22, thereby realizing two-stage lifting and increasing the lifting stroke of the lifting platform.

[0054] The lifting platform for municipal engineering construction has a rotating disk 17 at the lower end of the bracket 1, one end of the rotating disk 17 is rotatably connected to the plane of a moving vehicle 18, a rotating motor 19 is provided on the moving vehicle 18, the bottom end of the output shaft of the rotating motor 19 is rotatably connected to the plane of the moving vehicle 18, and one end of the rotating disk 17 is fixedly connected to the output shaft of the rotating motor 19, so that the lifting platform can be facing the front or the side relative to the moving vehicle 18, which is beneficial for use in suspension bridge operations. When the suspension bridge operation height remains unchanged, the moving vehicle 18 moves along the bridge 31, thereby improving the operation efficiency.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting platform for municipal engineering construction, characterized in that: The invention comprises a bracket (1), an upper base (2) and a lower base (3); a support rod (4) is connected between the upper base (2) and the bracket (1); one end of the support rod (4) is hinged to the side of the upper base (2); the other end of the support rod (4) is slidably connected to the side of the bracket (1); a telescopic mechanism is arranged between the upper base (2) and the lower base (3), comprising a driving component and a telescopic component; the driving component causes the upper base (2) and the lower base (3) to rise and fall relative to each other through the telescopic component; a movable pin (5) is arranged on one side of the upper base (2) and the lower base (3) close to the bracket (1); and a corresponding pin hole (6) is arranged on the bracket (1).

2. A lifting platform for municipal engineering construction according to claim 1, characterized in that: Vertical slide grooves (7) are provided on both sides of the bracket (1), and one end of the support rod (4) is slidably connected in the vertical slide groove (7).

3. A lifting platform for municipal engineering construction according to claim 2, characterized in that: A locking mechanism is arranged between the bracket (1) and the support rod (4), and the locking mechanism comprises a group of saw teeth (8), a group of telescopic teeth (9), a spring (10), an elliptical wheel (11), a rotating shaft (12), and a locking motor (13); a group of saw teeth (8) is arranged on the side of the bracket (1); a group of telescopic teeth (9) is arranged on the support rod (4) and connected to one end of the bracket (1); the elliptical wheel (11) is arranged in the middle of the group of telescopic teeth (9); the locking motor (13) is arranged on the support rod (4); the output end of the locking motor (13) is connected to the center of the elliptical wheel (11); and the spring is connected between the telescopic teeth (9) and the support rod (4).

4. A lifting platform for municipal engineering construction according to claim 3, characterized in that: The telescopic assembly is a scissor connecting rod group (14), the driving assembly is an electric telescopic rod (15), a transverse sliding groove (16) is provided at the lower end of the upper base (2) and the upper end of the lower base (3), a connecting rod at one side of the upper end and the lower end of the scissor connecting rod group (14) is slidably connected in the transverse sliding groove (16), and the electric telescopic rod (15) is connected to the connecting rod sliding in the transverse sliding groove (16).

5. A lifting platform for municipal engineering construction according to claim 4, characterized in that: A rotating disk (17) is provided at the lower end of the bracket (1), one end of the rotating disk (17) is rotatably connected to the plane of a moving vehicle (18), a rotating motor (19) is provided on the moving vehicle (18), the bottom end of the output shaft of the rotating motor (19) is rotatably connected to the plane of the moving vehicle (18), and one end of the rotating disk (17) is fixedly connected to the output shaft of the rotating motor (19).

6. A lifting platform for municipal engineering construction according to claim 5, characterized in that: The support (1) is also provided with a lifting mechanism, which comprises a top plate (20), a screw rod (21), a guide rod (22), a slider (23), and a lifting motor (24); the screw rod (21) is rotatably connected between the top plate (20) and the rotating disk (17); the guide rod (22) is connected between the top plate (20) and the rotating disk (17); the lifting motor (24) is fixed to the bottom end of the rotating disk (17); the output end of the lifting motor (24) is connected to the screw rod (21); the slider (23) is meshed with the screw rod (21); the slider (23) is connected to the support (1); and the other end of the support (1) is slidably connected to the guide rod (22).

7. A lifting platform for municipal engineering construction according to claim 6, characterized in that: The upper fence (25) is raised or lowered on the upper base plate (2) through a connecting rod (26).

8. A lifting platform for municipal engineering construction according to claim 1, characterized in that: The lower base plate (3) is hollow, the lower fence (27) is telescopically connected to the lower base plate (3), and the lower end of the lower fence (27) is connected to the bottom plate (28).

9. A lifting platform for municipal engineering construction according to claim 5, characterized in that: The rotating disk (17) is provided with a fixing mechanism, which comprises a rotating rod (29), and the outer end of the rotating rod (29) is threadedly connected to a fixing rod (30).

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