Supporting device for constructional engineering detection

Abstract

The utility model discloses a supporting device for constructional engineering detection, which comprises a base, a hollow column welded at the top of the base, a shell in sliding connection with the outer wall of the hollow column, a top block fixedly connected at the top of the shell, a hollow block welded at the center of the top of the top block, a top box welded at the top of a bottom plate, and an outer frame mounted at the top of the top box, a top plate is fixedly connected to the inner wall of the outer frame, a cross-shaped sliding groove frame penetrates through the top plate, first sliding plates are slidably connected to the two ends of the inner wall of the cross-shaped sliding groove frame, and when first sliding blocks move in the opposite directions, the two first clamping plates get close to each other, so that the outer walls of the two sides of detection equipment placed in the center of the top of the top plate are clamped and fixed; when the second sliding blocks move in the opposite directions, the two sets of second clamping plates get close to each other, so that the outer walls of the front end and the rear end of the detection equipment placed in the center of the top of the top plate are clamped and fixed, the safety of the whole supporting device is improved, and meanwhile damage to the detection equipment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a supporting device for construction engineering detection. Background Art

[0002] A construction project refers to an engineering entity formed through the construction of various types of buildings and their ancillary facilities and the installation of supporting lines, pipelines, and equipment. During the on-site measurement of the construction project, measuring equipment is needed to collect on-site data, and supporting devices are needed to place the measuring equipment.

[0003] Although the existing support device can adjust the height of the mounting plate, the adjustment is complicated and requires manual stretching of the multiple support legs at the bottom in sequence, and ensuring that the spacing of the legs are pulled out each time is the same, which reduces the adjustment efficiency of the staff and increases the workload of the staff. In addition, it does not have a positioning function. When the detection equipment is placed on the mounting plate, it cannot be limited. Therefore, when the device is shaken, it is very easy to cause the detection equipment to fall, and the safety is low. Based on these problems, Chinese patent CN219102594U discloses a support device for construction engineering detection. By starting the motor, the motor will drive the threaded rod to rotate with the cooperation of the bearing after starting. When the threaded rod rotates, it will drive the lifting plate to move upward with the cooperation of the guide rail and the guide block. When the lifting plate moves upward, it will drive the base plate to move upward together with the fixing of the fixed column. The height of the device can be efficiently adjusted, the operation is simple and convenient, the work efficiency of the staff is improved, and the workload is reduced.

[0004] The supporting device utilizes two clamping plates to clamp and fix the outer walls of both sides of the detection equipment, but the outer walls of the other two sides are not provided with clamping or intercepting structures. When the entire supporting device moves quickly, the detection equipment can easily slide in the direction where no clamping or intercepting structure is provided due to the action of inertia. When the inertia is too large, the detection equipment may directly jump out from the direction where no clamping or intercepting structure is provided and fall to the ground, which will not only cause damage to the detection equipment, but also affect the use effect of the supporting device. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A supporting device for construction engineering inspection comprises a base, a hollow column welded on the top of the base, an outer shell is slidably connected to the outer wall of the hollow column, a top block is fixedly connected to the top of the outer shell, a hollow block is welded at the top center of the top block, side blocks are installed on the outer walls on both sides of the hollow block, a bottom plate is welded on the top of the side block, a top box is welded on the top of the bottom plate, an outer frame is installed on the top of the top box, the top plate is fixedly connected to the inner wall of the outer frame, a cross slide frame runs through the top plate, a first slide plate is slidably connected to both ends of the inner wall of the cross slide frame, a first clamping plate is welded to the top of the first slide plate, a second slide plate is slidably connected to the other two ends of the inner wall of the cross slide frame, and a second clamping plate is welded to the top of the second slide plate.

[0008] As a further description of the above technical solution:

[0009] Side plates are welded at both ends of the outer walls on both sides of the base, plug rods are welded at the center of the outer walls on both sides of the base, long axis bolts are threadedly connected to the inner walls at the center of the opposite sides of the plug rods, bottom blocks are sleeved on the outer walls of the plug rods, and universal wheels are fixedly connected at both ends of the bottom of the bottom block.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the hollow column is fixedly connected with a threaded sleeve, the inner wall of the threaded sleeve is threadedly connected with a threaded column, the top of the threaded column is welded with a first bevel gear, the top center of the first bevel gear is welded with a support rod, the top of the support rod is rotatably connected with a first rotating shaft, and the top of the first rotating shaft is fixedly connected to the bottom center of the top block.

[0012] As a further description of the above technical solution:

[0013] A first shaft ring passes through the top of one side of the inner wall of the shell, and the inner wall of the first shaft ring is rotatably connected to a first shaft core, one end face of the first shaft core is fixedly connected to a first turntable, and the other end face of the first shaft core is fixedly connected to a second bevel gear, and the tooth block of the bevel surface of the first bevel gear is meshed with the tooth groove of the bevel surface of the second bevel gear.

[0014] As a further description of the above technical solution:

[0015] An outer cylinder is passed through the side blocks, one end of the inner wall of the outer cylinder is fixedly connected with a second shaft ring, the inner wall of the second shaft ring is slidably connected with a shaft rod, the top end of the outer wall of the shaft rod is sleeved with a return spring, the top of the shaft rod is fixedly connected with a clamping block, the outer wall of the clamping block is clamped with the two ends of the inner wall of the hollow block, the two ends of the top of the top box are welded with an insertion shaft, the inner wall at the center of the top of the insertion shaft is threadedly connected with a short shaft bolt, and the outer wall of the insertion shaft is plugged with the two ends of the outer frame.

[0016] As a further description of the above technical solution:

[0017] A second rotating shaft is fixedly connected to the bottom end of one side of the inner wall of the top box, and a first bidirectional threaded rod is rotatably connected to the movable end of the second rotating shaft. A first sliding block is threadedly connected to both ends of the outer wall of the first bidirectional threaded rod, a first ring is fixedly connected to the top center of the first sliding block, a first plug-in block is inserted into the inner wall of the first ring, and the top of the first plug-in block is fixedly connected to the bottom center of the first sliding plate.

[0018] As a further description of the above technical solution:

[0019] The outer walls of the first clamping plates are sleeved with a first rubber sleeve, the rear end of the inner wall of the top box is fixedly connected with a third rotating shaft, the movable end of the third rotating shaft is rotatably connected with a second bidirectional threaded rod, both ends of the outer walls of the second bidirectional threaded rod are threadedly connected with a second slider, the top center of the second slider is fixedly connected with a second ring, the inner wall of the second ring is plugged with a second plug, the top of the second plug is fixedly connected with the center of the bottom of the second slide plate, the outer walls of the second clamping plates are sleeved with a second rubber sleeve, one end faces of the first bidirectional threaded rod and the second bidirectional threaded rod are welded with a second shaft core, the top of the second shaft core is welded with a second turntable, and the outer walls of the second shaft core pass through the bottom end of the other side of the inner wall of the top box and the front end of the inner wall of the top box.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] (1) When the staff rotates the second turntable, the first bidirectional threaded rod and the second bidirectional threaded rod at the bottom end of the second shaft core will rotate together. At this time, the first slider can move left and right at both ends of the outer wall of the rotating first bidirectional threaded rod, and the second slider can move forward and backward at both ends of the outer wall of the rotating second bidirectional threaded rod. The two groups of first sliders or the two groups of second sliders can only move in relative directions or in opposite directions. When the first slider moves in relative directions, the two groups of first clamping plates will approach each other, thereby clamping and fixing the outer walls of both sides of the detection equipment placed at the top center of the top plate. When the second slider moves in relative directions, the two groups of second clamping plates will approach each other, thereby clamping and fixing the front and rear end outer walls of the detection equipment placed at the top center of the top plate. This not only improves the safety of the entire supporting device, but also avoids damage to the detection equipment.

[0022] (2) By setting a universal wheel, the entire support device can be moved more conveniently and quickly. By setting a simple connection method between the bottom block, the plug rod and the long axis bolt, the disassembly and assembly steps of the bottom block are more convenient and quick, and it is also convenient to replace the universal wheel. By setting a connection structure between the first bevel gear and the second bevel gear, when the first turntable rotates with the second bevel gear on the first shaft core, the second bevel gear will also rotate with the threaded column at the bottom of the first bevel gear. At this time, the rotating threaded column can move up and down on the inner wall of the threaded set, and the outer shell can also move up and down on the outer wall of the hollow column, thereby playing a role in adjusting the height of the entire support device. When the staff pulls the shaft rod in opposite directions at the same time, the block can quickly detach from the through hole inside the hollow block. At this time, the structure above the bottom plate can be disassembled or installed. By setting a simple connection method between the plug shaft, the outer frame and the short axis bolt, the disassembly and assembly steps of the top plate are more convenient and quick. When the top plate is removed, the staff can repair and replace the parts inside the top box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the utility model;

[0024] Figure 2 It is a front view of the utility model;

[0025] Figure 3 It is a front cross-sectional view of the utility model;

[0026] Figure 4 For this utility model Figure 3 A partial enlarged view of the middle A area;

[0027] Figure 5 For this utility model Figure 3 A partial enlarged view of the middle B area;

[0028] Figure 6 For this utility model Figure 3 A partial enlarged view of the middle C area;

[0029] Figure 7 For this utility model Figure 3 A partial enlarged view of the middle D area;

[0030] Figure 8 It is a three-dimensional diagram of the connection structure of the first shaft core, the first rotating disk and the second bevel gear in the utility model.

[0031] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0032] 1. Base; 2. Side plate; 3. Insert rod; 4. Long axis bolt; 5. Bottom block; 6. Universal wheel; 7. Hollow column; 8. Threaded sleeve; 9. Threaded column; 10. First bevel gear; 11. Support rod; 12. First rotating shaft; 13. Top block; 14. Shell; 15. First shaft ring; 16. First shaft core; 17. First turntable; 18. Second bevel gear; 19. Hollow block; 20. Side block; 21. Bottom plate; 22. Outer cylinder; 23. Second shaft ring; 24. Shaft rod; 25. Return spring; 26. Block; 27. Top box; 28. Insert rod axle; 29, short axis bolt; 30, outer frame; 31, top plate; 32, cross slide frame; 33, second rotating shaft; 34, first two-way threaded rod; 35, first slider; 36, first collar; 37, first plug-in block; 38, first slide plate; 39, first clamping plate; 40, first rubber sleeve; 41, third rotating shaft; 42, second two-way threaded rod; 43, second slider; 44, second collar; 45, second plug-in block; 46, second slide plate; 47, second clamping plate; 48, second rubber sleeve; 49, second shaft core; 50, second turntable. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0036] Reference Figure 1-8The utility model provides an embodiment of a support device for construction engineering detection, including a base 1, side plates 2 are welded at both ends of the outer walls on both sides of the base 1, the height of the side plates 2 is the same as the height of the base 1, the top surface of the side plates 2 and the top surface of the base 1 are arranged on the same horizontal plane, a plug rod 3 is welded at the center of the outer walls on both sides of the base 1, and the inner wall at the center of the opposite side of the plug rod 3 is threadedly connected with a long axis bolt 4, and a thread groove is opened at the center of the opposite side of the plug rod 3. The threaded portion of the outer wall of the long axis bolt 4 is connected with the thread groove, and the outer wall of the plug rod 3 is sleeved with a bottom block 5, and both ends of the bottom of the bottom block 5 are fixedly connected with a universal wheel 6. By setting the universal wheel 6, the whole support device can be moved more conveniently and quickly. The bottom block 5 can be fixed on the outer wall of the plug rod 3 by using the long axis bolt 4. By setting the side plate 2, the installation position of the bottom block 5 can be limited. By setting a simple connection method between the bottom block 5, the plug rod 3 and the long axis bolt 4, the disassembly and assembly steps of the bottom block 5 are more convenient and quick, and it is also convenient to replace the universal wheel 6.

[0037] A hollow column 7 is welded on the top of the base 1, and a threaded sleeve 8 is fixedly connected to the inner wall of the hollow column 7. A cavity running through the upper and lower parts is opened in the hollow column 7, and the outer wall of the threaded sleeve 8 is fixedly connected to the inner wall of the cavity. The height of the hollow column 7 is the same as that of the threaded sleeve 8. A threaded column 9 is threadedly connected to the inner wall of the threaded sleeve 8. A first bevel gear 10 is welded on the top of the threaded column 9, and a support rod 11 is welded at the top center of the first bevel gear 10. The top of the support rod 11 is rotatably connected to the first rotating shaft 12, and a top block 13 is fixedly connected to the top of the first rotating shaft 12. A shell 14 is welded at the outer edge of the bottom of the top block 13. The inner wall of the shell 14 is slidably connected to the outer wall of the hollow column 7. By setting a connection structure between the shell 14 and the hollow column 7, it is beneficial to improve the stability of the shell 14 during the up and down movement. One side of the inner wall of the shell 14 A first shaft ring 15 passes through the top, and the inner wall of the first shaft ring 15 is rotatably connected to the first shaft core 16, one end face of the first shaft core 16 is fixedly connected to the first turntable 17, and the other end face of the first shaft core 16 is fixedly connected to the second bevel gear 18, and the tooth block on the bevel of the first bevel gear 10 is meshed with the tooth groove on the bevel of the second bevel gear 18. By setting a connecting structure between the first bevel gear 10 and the second bevel gear 18, when the first turntable 17 rotates with the second bevel gear 18 on the first shaft core 16, the second bevel gear 18 will also rotate with the threaded column 9 at the bottom of the first bevel gear 10. At this time, the rotating threaded column 9 can move up and down on the inner wall of the threaded sleeve 8, and at the same time, the outer shell 14 can also move up and down on the outer wall of the hollow column 7, thereby playing a role in adjusting the height of the entire supporting device.

[0038] A hollow block 19 is welded at the center of the top of the top block 13, and side blocks 20 are installed on the outer walls of both sides of the hollow block 19, and a bottom plate 21 is welded on the top of the side block 20. An outer cylinder 22 is penetrated through the side blocks 20, and one end of the inner wall of the outer cylinder 22 is fixedly connected to a second shaft ring 23, and the inner wall of the second shaft ring 23 is slidably connected to a shaft rod 24, and a return spring 25 is sleeved on the top of the outer wall of the shaft rod 24. A clamping block 26 is fixedly connected to the top of the shaft rod 24, and the outer wall of the clamping block 26 is clamped with the two ends of the inner wall of the hollow block 19. A through hole is opened in the hollow block 19 that runs through the outer walls on both sides in a horizontal direction, and the outer wall of the clamping block 26 can be inserted into the two ends of the inner wall of the through hole, so as to fix the structure above the bottom plate 21. When the staff pulls the shaft rod 24 in opposite directions at the same time, the clamping block 26 can quickly detach from the through hole inside the hollow block 19, and the structure above the bottom plate 21 can be disassembled or installed at this time.

[0039] A top box 27 is welded to the top of the bottom plate 21, and an insert shaft 28 is welded to both ends of the top of the top box 27. A short-axis bolt 29 is threadedly connected to the inner wall at the top center of the insert shaft 28, and an outer frame 30 is inserted into the outer wall of the insert shaft 28. The inner wall of the outer frame 30 is fixedly connected to the top plate 31, and a cross slide frame 32 passes through the top plate 31. Through holes that pass through the top and bottom are opened at both ends of the outer frame 30, and the outer wall of the insert shaft 28 vertically passes through the through hole. A threaded groove is opened at the top center of the insert shaft 28, and the threaded portion of the outer wall of the short-axis bolt 29 can be connected to the threaded groove. By setting a simple connection method between the insert shaft 28, the outer frame 30 and the short-axis bolt 29, the disassembly and assembly steps of the top plate 31 are more convenient and quick. When the top plate 31 is removed, the staff can repair and replace the parts inside the top box 27.

[0040] A second rotating shaft 33 is fixedly connected to the bottom end of one side of the inner wall of the top box 27, and a first bidirectional threaded rod 34 is rotatably connected to the movable end of the second rotating shaft 33. Both ends of the outer wall of the first bidirectional threaded rod 34 are threadedly connected to a first slider 35, and a first ring 36 is fixedly connected to the center of the top of the first slider 35. The inner wall of the first ring 36 is plugged with a first plug block 37, and the top of the first plug block 37 is fixedly connected to a first slide plate 38. The top of the outer wall of the first slide plate 38 is slidably connected to the two ends of the inner wall of the cross slide frame 32, and a first clamping plate 39 is welded on the top of the first slide plate 38. The outer wall of the first clamping plate 39 is sleeved with a first rubber sleeve 40. The rear end of the inner wall of the top box 27 is fixedly connected There is a third rotating shaft 41, and the movable end of the third rotating shaft 41 is rotatably connected to the second bidirectional threaded rod 42, the second bidirectional threaded rod 42 is arranged above the first bidirectional threaded rod 34, and the two ends of the outer wall of the second bidirectional threaded rod 42 are threadedly connected to the second slider 43, and the second slider 43 is fixedly connected to the second ring 44 at the center of the top, and the second ring 44 The inner wall is plugged with a second plug block 45, and the top of the second plug block 45 is fixedly connected to the second slide plate 46, the top of the outer wall of the second slide plate 46 is slidably connected to the other two ends of the inner wall of the cross slide frame 32, the top of the second slide plate 46 is welded with a second clamping plate 47, and the outer wall of the second clamping plate 47 is sleeved with a second rubber sleeve 48.

[0041] The first bidirectional threaded rod 34 and the second bidirectional threaded rod 42 are both welded with a second shaft core 49 on one end surface, and a second turntable 50 is welded on the top of the second shaft core 49. The outer wall of the second shaft core 49 passes through the bottom end of the other side of the inner wall of the top box 27 and the front end of the inner wall of the top box 27. When the staff rotates the second turntable 50, the first bidirectional threaded rod 34 and the second bidirectional threaded rod 42 at the bottom of the second shaft core 49 will rotate together. At this time, the first slider 35 can move left and right at both ends of the outer wall of the rotating first bidirectional threaded rod 34, and the second slider 43 can move back and forth at both ends of the outer wall of the rotating second bidirectional threaded rod 42. It is worth noting that the two groups of first sliders 35 or the two groups of second sliders 43 can only move in relative directions or in opposite directions. When the first slider 35 When moving in relative directions, the two groups of first clamping plates 39 will approach each other, thereby clamping and fixing the outer walls on both sides of the detection equipment placed at the top center of the top plate 31. When the second slider 43 moves in relative directions, the two groups of second clamping plates 47 will approach each other, thereby clamping and fixing the front and rear end outer walls of the detection equipment placed at the top center of the top plate 31. By setting the first rubber sleeve 40 and the second rubber sleeve 48, the clamped outer wall of the detection equipment can be protected. By setting the connecting structure between the first ring 36 and the first plug block 37 and between the second ring 44 and the second plug block 45, the first clamping plate 39 can be connected to the first slider 35, and the second clamping plate 47 can be connected to the second slider 43.

[0042] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A support device for construction engineering inspection, comprising a base (1), characterized in that: A hollow column (7) is welded on the top of the base (1), a housing (14) is slidably connected to the outer wall of the hollow column (7), a top block (13) is fixedly connected to the top of the housing (14), a hollow block (19) is welded at the center of the top of the top block (13), side blocks (20) are installed on the outer walls of both sides of the hollow block (19), a bottom plate (21) is welded on the top of the side block (20), a top box (27) is welded on the top of the bottom plate (21), and an outer box (27) is installed on the top of the top box (27). The outer frame (30) is fixedly connected to the inner wall of the outer frame (30) with a top plate (31), a cross slot frame (32) is passed through the top plate (31), both ends of the inner wall of the cross slot frame (32) are slidably connected to a first slide plate (38), the top of the first slide plate (38) is welded with a first clamping plate (39), and the other two ends of the inner wall of the cross slot frame (32) are slidably connected to a second slide plate (46), and the top of the second slide plate (46) is welded with a second clamping plate (47).

2. A support device for construction engineering inspection according to claim 1, characterized in that: Side plates (2) are welded to both ends of the outer walls on both sides of the base (1), plug rods (3) are welded at the center of the outer walls on both sides of the base (1), long axis bolts (4) are threadedly connected to the inner walls at the center of the opposite sides of the plug rods (3), bottom blocks (5) are sleeved on the outer walls of the plug rods (3), and universal wheels (6) are fixedly connected to both ends of the bottom of the bottom block (5).

3. A support device for construction engineering inspection according to claim 1, characterized in that: The inner wall of the hollow column (7) is fixedly connected with a threaded sleeve (8), the inner wall of the threaded sleeve (8) is threadedly connected with a threaded column (9), the top of the threaded column (9) is welded with a first bevel gear (10), the center of the top of the first bevel gear (10) is welded with a support rod (11), the top of the support rod (11) is rotatably connected with a first rotating shaft (12), and the top of the first rotating shaft (12) is fixedly connected to the center of the bottom of the top block (13).

4. A support device for construction engineering inspection according to claim 3, characterized in that: A first shaft ring (15) is passed through the top end of one side of the inner wall of the housing (14); a first shaft core (16) is rotatably connected to the inner wall of the first shaft ring (15); a first rotating disk (17) is fixedly connected to one end face of the first shaft core (16); a second bevel gear (18) is fixedly connected to the other end face of the first shaft core (16); a tooth block on the bevel of the first bevel gear (10) meshes with a tooth groove on the bevel of the second bevel gear (18).

5. A support device for construction engineering inspection according to claim 1, characterized in that: The side blocks (20) are all penetrated by an outer cylinder (22), one end of the inner wall of the outer cylinder (22) is fixedly connected to a second shaft ring (23), the inner wall of the second shaft ring (23) is slidably connected to a shaft rod (24), the top end of the outer wall of the shaft rod (24) is sleeved with a return spring (25), the top of the shaft rod (24) is fixedly connected to a clamping block (26), the outer wall of the clamping block (26) is clamped with the inner wall of the hollow block (19) at both ends, the top of the top box (27) is welded with an insertion shaft (28), the inner wall at the top center of the insertion shaft (28) is threadedly connected to a short shaft bolt (29), and the outer wall of the insertion shaft (28) is plugged with the two ends of the outer frame (30).

6. A support device for construction engineering inspection according to claim 1, characterized in that: A second rotating shaft (33) is fixedly connected to the bottom end of one side of the inner wall of the top box (27); a first bidirectional threaded rod (34) is rotatably connected to the movable end of the second rotating shaft (33); a first slider (35) is threadedly connected to both ends of the outer wall of the first bidirectional threaded rod (34); a first sleeve (36) is fixedly connected to the center of the top of the first slider (35); a first plug-in block (37) is inserted into the inner wall of the first sleeve (36); and the top of the first plug-in block (37) is fixedly connected to the center of the bottom of the first slide plate (38).

7. A support device for construction engineering inspection according to claim 6, characterized in that: The outer wall of the first clamping plate (39) is sleeved with a first rubber sleeve (40), the rear end of the inner wall of the top box (27) is fixedly connected with a third rotating shaft (41), the movable end of the third rotating shaft (41) is rotatably connected with a second bidirectional threaded rod (42), both ends of the outer wall of the second bidirectional threaded rod (42) are threadedly connected with a second slider (43), the top center of the second slider (43) is fixedly connected with a second ring (44), and the inner wall of the second ring (44) is plugged with a second plug ( 45), the top of the second plug block (45) is fixedly connected to the center of the bottom of the second slide plate (46), the outer wall of the second clamping plate (47) is sleeved with a second rubber sleeve (48), the first bidirectional threaded rod (34) and the second bidirectional threaded rod (42) are welded with a second shaft core (49) on one end surface, the top of the second shaft core (49) is welded with a second turntable (50), and the outer wall of the second shaft core (49) passes through the bottom end of the other side of the inner wall of the top box (27) and the front end of the inner wall of the top box (27).

Images