Bridge detection device

Abstract

The invention discloses a bridge detection device, which belongs to the technical field of bridge detection and comprises a moving mechanism, a rotating mechanism is arranged below the moving mechanism, a telescopic mechanism is arranged on the rotating mechanism, a detector mounting plate is arranged at one end, far away from the rotating mechanism, of the telescopic mechanism, and a detector is arranged on the top surface of the detector mounting plate. A plurality of clamping mechanisms are arranged on the top face of the moving mechanism, and a hoisting mechanism is arranged on the top face of the clamping mechanism close to the middle position of the moving mechanism. The clamping mechanism and the fixing plate of the moving mechanism are used in cooperation to clamp the side edge of the bridge, a lane does not need to be occupied, and normal traffic of the surface of the bridge cannot be affected; by arranging the rotating mechanism, the telescopic mechanism can move to the position below the bridge from the side face of the bridge, and steering is free; the detector is driven by the telescopic mechanism to move from front to back, the detector is driven by the moving mechanism to move from left to right, multi-directional detection is achieved, and the working efficiency is high; the hoisting mechanism is used for transferring the device, and operation is simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge detection, and in particular to a bridge detection device. Background Art

[0002] With the rapid development of my country, more and more infrastructure facilities have been built, making transportation more and more convenient. The achievements of bridge construction are particularly remarkable. In order to ensure the safe and effective operation of traffic, regular routine inspections must be carried out after the bridge is built and put into use. The data obtained from the inspection is used to evaluate the overall health of the bridge. According to the overall health of the bridge, a reasonable maintenance plan is formulated to ensure the safety and service life of the bridge to achieve the designed effect.

[0003] The existing bridge substructure inspection generally involves parking an inspection vehicle on the bridge and using a robotic arm to extend under the bridge for inspection. When inspecting longer bridges, the inspection vehicle needs to occupy the lane for a long time, affecting the bridge's traffic and causing traffic congestion. Summary of the invention

[0004] The purpose of the present invention is to provide a bridge inspection device to solve the problem that an inspection vehicle needs to occupy a lane for a long time when inspecting a long bridge, which affects the traffic on the bridge and causes traffic congestion.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a bridge detection device, comprising a moving mechanism, a rotating mechanism is arranged below the moving mechanism, a telescopic mechanism is arranged on the rotating mechanism, a detector mounting plate is arranged at one end of the telescopic mechanism away from the rotating mechanism, a detector is arranged on the top surface of the detector mounting plate, a plurality of clamping mechanisms are arranged on the top surface of the moving mechanism, and a lifting mechanism is arranged on the top surface of the clamping mechanism near the middle position of the moving mechanism.

[0007] Furthermore, the moving mechanism includes a fixed plate, the top surface of the fixed plate is provided with the clamping mechanism, the bottom surface of the fixed plate is provided with a first slide rail, the first slide rail is provided with a first slider, the bottom surface of the first slider is provided with a moving plate, the bottom surface of the fixed plate and one side of the first slide rail is provided with a first rack, one side of the first rack is meshed with a first gear, the bottom surface of the moving plate is provided with a first motor for driving the first gear, and the rotating mechanism is provided below the moving plate.

[0008] Furthermore, the number of the first slide rails is set to two, and the two first slide rails are arranged in parallel.

[0009] Furthermore, the rotating mechanism includes a mounting frame, which is arranged below the movable plate, a rotating seat is arranged at the center position of the mounting frame, the lower part of the rotating seat extends to the bottom of the mounting frame, a connecting seat is arranged on the bottom surface of the rotating seat, the telescopic mechanism is arranged on the connecting seat, a second gear is arranged on the top of the rotating seat, the side of the second gear is meshed and connected with a second rack, a second slide rail is arranged on the bottom plate of the mounting frame, a second slide rail is arranged on the second slide rail, the second slide block is connected to the second rack, and a hydraulic push rod is arranged on the left side of the mounting frame, and the working end of the hydraulic push rod is connected to the second slide block.

[0010] Furthermore, the number of the second racks is set to two, and the two second racks are symmetrically arranged on the front and rear sides of the second gear. The number of the second slide rails and the second slider is also set to two, and the working end of the hydraulic push rod is connected to the second slider located on the front side.

[0011] Furthermore, the telescopic mechanism includes a primary frame, a secondary frame and a tertiary frame, the left end of the primary frame is arranged on the connecting seat, the secondary frame is arranged on the right side of the primary frame, the tertiary frame is arranged on the right side of the secondary frame, the detector mounting plate is arranged on the right side of the tertiary frame, a first transmission assembly connected to the primary frame is arranged below the secondary frame, a second transmission assembly connected to the primary frame is arranged above the secondary frame, a third transmission assembly connected to the tertiary frame is arranged inside the secondary frame, and a second motor connected to the first transmission assembly is arranged on the bottom surface of the primary frame.

[0012] Furthermore, the first transmission assembly includes a first transmission wheel and a second transmission wheel, the first transmission wheel is arranged inside the first-stage frame near the left end, the second transmission wheel is arranged inside the first-stage frame near the right end, the first transmission wheel and the second transmission wheel are connected by a first transmission belt, and the first transmission belt is connected to the left end of the second-stage frame through a first connecting block;

[0013] The second transmission assembly includes a third transmission wheel and a fourth transmission wheel, the third transmission wheel and the fourth transmission wheel are respectively arranged at the left and right ends of the top surface of the secondary frame, the third transmission wheel and the fourth transmission wheel are connected by a second transmission belt, and the second transmission belt is connected to the right end of the primary frame through a second connecting block;

[0014] The third transmission assembly includes a fifth transmission wheel and a sixth transmission wheel, and the fifth transmission wheel and the sixth transmission wheel are respectively arranged at the left and right ends of the second-stage frame, the fifth transmission wheel is coaxially arranged with the third transmission wheel, and the sixth transmission wheel is coaxially arranged with the fourth transmission wheel, and the fifth transmission wheel and the sixth transmission wheel are connected by a third transmission belt, and the third transmission belt is connected to the left end of the third-stage frame through a third connecting block.

[0015] Furthermore, the number of the clamping mechanisms is set to four, and the hoisting mechanism is arranged on the top surfaces of the two clamping mechanisms located in the middle.

[0016] Furthermore, the clamping mechanism includes a column, the bottom end of the column is connected to the top surface of the fixed plate, a lifting seat is provided on the outer side of the column, a clamping plate is provided on the rear side of the lifting seat, a third rack is provided on the side wall of the column, a third gear meshing with the third rack is provided inside the lifting seat, and a third motor for driving the third gear is provided on the outer side of the lifting seat.

[0017] Furthermore, the lifting mechanism includes a connecting plate, which is connected to the top of the column, and the top surface of the connecting plate has several longitudinal beams, both ends of the longitudinal beams are connected to the connecting plate through connecting columns, the top surface of the longitudinal beam is provided with a cross beam, and the center position of the top surface of the cross beam is provided with a lifting ear.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are:

[0019] The present invention utilizes a clamping mechanism and a fixed plate of a moving mechanism to cooperate and clamp at the side edge of the bridge, without occupying a lane and without affecting the normal traffic on the bridge surface; by arranging a rotating mechanism, the telescopic mechanism can be moved from the side of the bridge to the bottom of the bridge and can be turned freely; the telescopic mechanism drives the detector to move from front to back, and the moving mechanism drives the detector to move from left to right, so that multi-directional detection can be achieved with high work efficiency; the device is transported by a hoisting mechanism, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 This is a front view of the bridge detection device of the present invention; (the telescopic mechanism rotates to one side of the bridge)

[0022] Figure 2 This is a side view of the bridge detection device of the present invention; (the telescopic mechanism rotates to the bottom of the bridge)

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the moving mechanism of the present invention;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the rotating mechanism of the present invention;

[0025] Figure 5 It is a three-dimensional structural schematic diagram of the telescopic mechanism of the present invention;

[0026] Figure 6 is a cross-sectional view of the telescopic mechanism of the present invention;

[0027] Figure 7 It is a three-dimensional structural schematic diagram of the clamping mechanism of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the lifting mechanism of the present invention.

[0029] Explanation of reference numerals: 1. moving mechanism; 2. rotating mechanism; 3. telescopic mechanism; 4. detector mounting plate; 5. detector; 6. clamping mechanism; 7. lifting mechanism; 8. bridge; 1-1. fixed plate; 1-2. first slide rail; 1-3. first slider; 1-4. moving plate; 1-5. first rack; 1-6. first motor; 1-7. first gear; 2-1. mounting frame; 2-2. rotating seat; 2-3. second gear; 2-4. second rack; 2-5. second slide rail; 2-6. second slider; 2-7. hydraulic push rod; 2-8. connecting seat; 3-1. primary frame; 3-2. secondary frame; 3-3. tertiary frame Frame; 3-4, second motor; 3-5, first transmission wheel; 3-6, second transmission wheel; 3-7, first transmission belt; 3-8, first connecting block; 3-9, third transmission wheel; 3-10, fourth transmission wheel; 3-11, second transmission belt; 3-12, second connecting block; 3-13, fifth transmission wheel; 3-14, sixth transmission wheel; 3-15, third transmission belt; 3-16, third connecting block; 6-1, column; 6-2, lifting seat; 6-3, clamping plate; 6-4, third rack; 6-5, third motor; 7-1, connecting plate; 7-2, connecting column; 7-3, longitudinal beam; 7-4, cross beam; 7-5, lifting ear. DETAILED DESCRIPTION

[0030] like Figure 1-8 As shown, a bridge detection device includes a moving mechanism 1, a rotating mechanism 2 is connected below the moving mechanism 1, a telescopic mechanism 3 is connected on the rotating mechanism 2, a detector mounting plate 4 is connected to the end of the telescopic mechanism 3 away from the rotating mechanism 2, a detector 5 is arranged on the top surface of the detector mounting plate 4, four clamping mechanisms 6 are connected to the top surface of the moving mechanism 1, and a lifting mechanism 7 is connected to the top surface of two of the clamping mechanisms 6 near the middle position of the moving mechanism 1.

[0031] like Figure 3As shown, the moving mechanism 1 includes a fixed plate 1-1, the top surface of the fixed plate 1-1 is connected to the clamping mechanism 6, the bottom surface of the fixed plate 1-1 is installed with two first slide rails 1-2, the two first slide rails 1-2 are arranged in parallel, the first slide rail 1-2 is slidably connected with a first slider 1-3, the bottom surface of the first slider 1-3 is connected to a moving plate 1-4, the bottom surface of the fixed plate 1-1 and one side of the first slide rail 1-2 is connected with a first rack 1-5, one side of the first rack 1-5 is meshingly connected with a first gear 1-7, the bottom surface of the moving plate 1-4 is installed with a first motor 1-6 for driving the first gear 1-7, and the rotating mechanism 2 is connected to the bottom of the moving plate 1-4.

[0032] When in use, the first motor 1-6 is started, the first motor 1-6 drives the first gear 1-7 to rotate, and the rotation of the first gear 1-7 drives the moving plate 1-4 to move in the left and right directions.

[0033] like Figure 4 As shown, the rotating mechanism 2 includes a mounting frame 2-1, and the mounting frame 2-1 includes a base plate, which is installed below the movable plate 1-4 through four connecting rods. A rotating seat 2-2 is rotatably installed at the center position of the mounting frame 2-1 through a bearing, and the lower part of the rotating seat 2-2 extends to the bottom of the mounting frame 2-1. The bottom surface of the rotating seat 2-2 is connected with a connecting seat 2-8, and the telescopic mechanism 3 is installed on the connecting seat 2-8. A second gear 2-3 is installed on the top of the rotating seat 2-2, and the front and rear sides of the second gear 2-3 are meshed and connected with a second rack 2-4. Two second slide rails 2-5 are installed on the bottom plate of the mounting frame 2-1, and a second slider 2-6 is slidably installed on the second slide rail 2-5, and the second slider 2-6 is connected to the second rack 2-4. A hydraulic push rod 2-7 is installed on the left side of the mounting frame 2-1, and the working end of the hydraulic push rod 2-7 is connected to the second slider 2-6 located on the front side.

[0034] When in use, the hydraulic push rod 2-7 works, pushing the second slider 2-6 located on the front side to move to the right, thereby driving the second rack 2-4 located on the front side to move to the right, and the second gear 2-3 rotates, driving the rotating seat 2-2 and the connecting seat 2-8 to rotate, so that the telescopic mechanism 3 rotates from one side of the bridge 8 to the bottom of the bridge 8, so as to facilitate the detection of the bridge 8 using the detector 5.

[0035] like Figure 5-6As shown, the telescopic mechanism 3 includes a primary frame 3-1, a secondary frame 3-2 and a tertiary frame 3-3, the left end of the primary frame 3-1 is connected to the connecting seat 2-8, the secondary frame 3-2 is arranged on the right side of the primary frame 3-1, the tertiary frame 3-3 is arranged on the right side of the secondary frame 3-2, the detector mounting plate 4 is connected to the right side of the tertiary frame 3-3, a first transmission assembly connected to the primary frame 3-1 is arranged below the secondary frame 3-2, a second transmission assembly connected to the primary frame 3-1 is arranged above the secondary frame 3-2, a third transmission assembly connected to the tertiary frame 3-3 is arranged inside the secondary frame 3-2, and a second motor 3-4 connected to the first transmission assembly is arranged on the bottom surface of the primary frame 3-1.

[0036] Specifically, the first transmission assembly includes a first transmission wheel 3-5 and a second transmission wheel 3-6. The first transmission wheel 3-5 is installed inside the first-stage frame 3-1 near the left end, and the second transmission wheel 3-6 is installed inside the first-stage frame 3-1 near the right end. The first transmission wheel 3-5 and the second transmission wheel 3-6 are connected by a first transmission belt 3-7, and the first transmission belt 3-7 is connected to the left end of the second-stage frame 3-2 through a first connecting block 3-8.

[0037] The second transmission assembly includes a third transmission wheel 3-9 and a fourth transmission wheel 3-10, and the third transmission wheel 3-9 and the fourth transmission wheel 3-10 are respectively installed on the left and right ends of the top surface of the secondary frame 3-2, and the third transmission wheel 3-9 and the fourth transmission wheel 3-10 are connected through a second transmission belt 3-11, and the second transmission belt 3-11 is connected to the right end of the primary frame 3-1 through a second connecting block 3-12.

[0038] The third transmission assembly includes a fifth transmission wheel 3-13 and a sixth transmission wheel 3-14, and the fifth transmission wheel 3-13 and the sixth transmission wheel 3-14 are respectively installed at the left and right ends inside the secondary frame 3-2, the fifth transmission wheel 3-13 is coaxially arranged with the third transmission wheel 3-9, and the sixth transmission wheel 3-14 is coaxially arranged with the fourth transmission wheel 3-10, and the fifth transmission wheel 3-13 and the sixth transmission wheel 3-14 are connected by a third transmission belt 3-15, and the third transmission belt 3-15 is connected to the left end of the tertiary frame 3-3 through a third connecting block 3-16.

[0039] When in use, start the second motor 3-4, the second motor 3-4 drives the first transmission wheel 3-5 to rotate, the rotation of the first transmission wheel 3-5 drives the first transmission belt 3-7 to move, the movement of the first transmission belt 3-7 drives the secondary frame 3-2 to move to the right, so that the secondary frame 3-2 extends to the right from the first frame 3-1; because the second transmission belt 3-11 is connected to the right end of the first frame 3-1 through the second connecting block 3-12, the second transmission belt 3-11 is driven to move during the movement of the secondary frame 3-2 to the right, and the second transmission belt 3-11 is driven to move. The movement of the second transmission belt 3-11 drives the third transmission wheel 3-9 and the fourth transmission wheel 3-10 to rotate. The rotation of the third transmission wheel 3-9 and the fourth transmission wheel 3-10 drives the fifth transmission wheel 3-13 and the sixth transmission wheel 3-14 to rotate. The rotation of the fifth transmission wheel 3-13 and the sixth transmission wheel 3-14 drives the third transmission belt 3-15 to move, thereby driving the third-level frame 3-3 to move to the right, so that the third-level frame 3-3 extends to the right from the second-level frame 3-2, and then the entire telescopic mechanism 3 is unfolded, and the detector 5 reaches the farthest end.

[0040] like Figure 7 As shown, the clamping mechanism 6 includes a column 6-1, the bottom end of the column 6-1 is connected to the top surface of the fixed plate 1-1, the outer side of the column 6-1 is movably connected with a lifting seat 6-2, the rear side of the lifting seat 6-2 is connected with a clamping plate 6-3, a third rack 6-4 is installed on the side wall of the column 6-1, a third gear meshing with the third rack 6-4 is installed inside the lifting seat 6-2 through a rotating shaft, and a third motor 6-5 for driving the third gear is installed on the outer side of the lifting seat 6-2.

[0041] When in use, start the third motor 6-5, the third motor 6-5 drives the third gear to rotate, the third gear is engaged with the third rack 6-4, drives the lifting seat 6-2 to descend, the lifting seat 6-2 drives the splint 6-3 to descend, so that the splint 6-3 contacts the top surface of the bridge 8, so that the splint 6-3 and the fixed plate 1-1 clamp the bridge 8.

[0042] like Figure 8 As shown, the lifting mechanism 7 includes a connecting plate 7-1, which is connected to the top of the column 6-1, and four longitudinal beams 7-3 are provided on the top surface of the connecting plate 7-1. Both ends of the longitudinal beams 7-3 are connected to the connecting plate 7-1 through connecting columns 7-2. The top surface of the longitudinal beams 7-3 is connected to two cross beams 7-4, and the center position of the top surface of the cross beam 7-4 is connected to a lifting ear 7-5.

[0043] The working process of the present invention is as follows:

[0044] First, the detection device is hoisted to one side of the bridge 8 by a lifting device, the fixed plate 1-1 contacts the bottom surface of the bridge 8, the third motor 6-5 is started, the third motor 6-5 drives the third gear to rotate, the third gear is meshed with the third rack 6-4, and the lifting seat 6-2 is driven to descend, and the lifting seat 6-2 drives the clamping plate 6-3 to descend, so that the clamping plate 6-3 contacts the top surface of the bridge 8, so that the clamping plate 6-3 and the fixed plate 1-1 clamp the bridge 8; then, the rotating mechanism 2 drives the telescopic mechanism 3 to rotate, so that the telescopic mechanism 3 rotates from one side of the bridge 8 to the bridge 8; then, the telescopic mechanism 3 is unfolded, driving the detector 5 to move from front to back, and the bottom surface of the bridge 8 is inspected until the detector 5 moves to the rear end, and this part of the inspection is completed; finally, the moving mechanism 1 drives the rotating mechanism 2 to move right to the next inspection position, the telescopic mechanism 3 is retracted, and the detector 5 is used to inspect the bridge 8 from back to front. When the telescopic mechanism 3 is retracted to the shortest, the detector 5 moves to the front end and the inspection is completed. Subsequently, the moving mechanism 1 continues to drive the rotating mechanism 2 to move right to the next inspection position, and the above inspection process is repeated.

[0045] When the rotating mechanism 2 moves to the rightmost side of the moving mechanism 1, the clamping mechanism 6 is separated from the bridge 8, and the detection device is hoisted to the next working position by a lifting device.

[0046] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A bridge detection device, characterized in that: The invention comprises a moving mechanism (1), a rotating mechanism (2) is arranged below the moving mechanism (1), a telescopic mechanism (3) is arranged on the rotating mechanism (2), a detector mounting plate (4) is arranged at one end of the telescopic mechanism (3) away from the rotating mechanism (2), a detector (5) is arranged on the top surface of the detector mounting plate (4), a plurality of clamping mechanisms (6) are arranged on the top surface of the moving mechanism (1), and a lifting mechanism (7) is arranged on the top surface of the clamping mechanism (6) near the middle position of the moving mechanism (1).

2. The bridge detection device according to claim 1, characterized in that: The moving mechanism (1) comprises a fixed plate (1-1), the top surface of the fixed plate (1-1) is provided with the clamping mechanism (6), the bottom surface of the fixed plate (1-1) is provided with a first slide rail (1-2), the first slide rail (1-2) is provided with a first slider (1-3), the bottom surface of the first slider (1-3) is provided with a moving plate (1-4), the bottom surface of the fixed plate (1-1) and located on one side of the first slide rail (1-2) is provided with a first rack (1-5), one side of the first rack (1-5) is meshedly connected with a first gear (1-7), the bottom surface of the moving plate (1-4) is provided with a first motor (1-6) for driving the first gear (1-7), and the rotating mechanism (2) is provided below the moving plate (1-4).

3. The bridge detection device according to claim 2, characterized in that: The number of the first slide rails (1-2) is set to two, and the two first slide rails (1-2) are arranged in parallel.

4. The bridge detection device according to claim 2, characterized in that: The rotating mechanism (2) comprises a mounting frame (2-1), wherein the mounting frame (2-1) is arranged below the movable plate (1-4), a rotating seat (2-2) is arranged at the center of the mounting frame (2-1), the lower part of the rotating seat (2-2) extends below the mounting frame (2-1), a connecting seat (2-8) is arranged on the bottom surface of the rotating seat (2-2), the telescopic mechanism (3) is arranged on the connecting seat (2-8), and a second connecting seat (2-2) is arranged on the top of the rotating seat (2-2). gear (2-3), the side of the second gear (2-3) is meshedly connected with a second rack (2-4), a second slide rail (2-5) is arranged on the bottom plate of the mounting frame (2-1), a second slider (2-6) is arranged on the second slide rail (2-5), the second slider (2-6) is connected to the second rack (2-4), a hydraulic push rod (2-7) is arranged on the left side of the mounting frame (2-1), and the working end of the hydraulic push rod (2-7) is connected to the second slider (2-6).

5. The bridge detection device according to claim 4, characterized in that: The number of the second racks (2-4) is set to two, and the two second racks (2-4) are symmetrically arranged on the front and rear sides of the second gear (2-3). The number of the second slide rails (2-5) and the second slider (2-6) is also set to two, and the working end of the hydraulic push rod (2-7) is connected to the second slider (2-6) located on the front side.

6. The bridge detection device according to claim 4, characterized in that: The telescopic mechanism (3) comprises a primary frame (3-1), a secondary frame (3-2) and a tertiary frame (3-3); the left end of the primary frame (3-1) is arranged on the connecting seat (2-8); the secondary frame (3-2) is arranged on the right side of the primary frame (3-1); the tertiary frame (3-3) is arranged on the right side of the secondary frame (3-2); the detector mounting plate (4) is arranged on the right side of the tertiary frame (3-3); a first transmission assembly connected to the primary frame (3-1) is arranged below the secondary frame (3-2); a second transmission assembly connected to the primary frame (3-1) is arranged above the secondary frame (3-2); a third transmission assembly connected to the tertiary frame (3-3) is arranged inside the secondary frame (3-2); and a second motor (3-4) connected to the first transmission assembly is arranged on the bottom surface of the primary frame (3-1).

7. The bridge detection device according to claim 6, characterized in that: The first transmission assembly comprises a first transmission wheel (3-5) and a second transmission wheel (3-6), the first transmission wheel (3-5) being arranged inside the first-stage frame (3-1) near the left end, the second transmission wheel (3-6) being arranged inside the first-stage frame (3-1) near the right end, the first transmission wheel (3-5) and the second transmission wheel (3-6) being connected in transmission via a first transmission belt (3-7), and the first transmission belt (3-7) being connected to the left end of the second-stage frame (3-2) via a first connecting block (3-8); The second transmission assembly comprises a third transmission wheel (3-9) and a fourth transmission wheel (3-10), the third transmission wheel (3-9) and the fourth transmission wheel (3-10) are respectively arranged at the left and right ends of the top surface of the secondary frame (3-2), the third transmission wheel (3-9) and the fourth transmission wheel (3-10) are connected in transmission via a second transmission belt (3-11), and the second transmission belt (3-11) is connected to the right end of the primary frame (3-1) via a second connecting block (3-12); The third transmission assembly comprises a fifth transmission wheel (3-13) and a sixth transmission wheel (3-14), the fifth transmission wheel (3-13) and the sixth transmission wheel (3-14) are respectively arranged at the left and right ends inside the secondary frame (3-2), the fifth transmission wheel (3-13) is coaxially arranged with the third transmission wheel (3-9), the sixth transmission wheel (3-14) is coaxially arranged with the fourth transmission wheel (3-10), the fifth transmission wheel (3-13) and the sixth transmission wheel (3-14) are connected by a third transmission belt (3-15), and the third transmission belt (3-15) is connected to the left end of the tertiary frame (3-3) by a third connecting block (3-16).

8. The bridge detection device according to claim 1, characterized in that: The number of the clamping mechanisms (6) is set to four, and the hoisting mechanism (7) is arranged on the top surfaces of the two clamping mechanisms (6) located in the middle.

9. The bridge detection device according to claim 2, characterized in that: The clamping mechanism (6) comprises a column (6-1), the bottom end of the column (6-1) is connected to the top surface of the fixed plate (1-1), a lifting seat (6-2) is arranged on the outer side of the column (6-1), a clamping plate (6-3) is arranged on the rear side of the lifting seat (6-2), a third rack (6-4) is arranged on the side wall of the column (6-1), a third gear meshing with the third rack (6-4) is arranged inside the lifting seat (6-2), and a third motor (6-5) for driving the third gear is arranged on the outer side of the lifting seat (6-2).

10. The bridge detection device according to claim 9, characterized in that: The hoisting mechanism (7) comprises a connecting plate (7-1), the connecting plate (7-1) being connected to the top end of the column (6-1), a plurality of longitudinal beams (7-3) being provided on the top surface of the connecting plate (7-1), both ends of the longitudinal beams (7-3) being connected to the connecting plate (7-1) via connecting columns (7-2), a cross beam (7-4) being provided on the top surface of the longitudinal beam (7-3), and a lifting lug (7-5) being provided at the center position of the top surface of the cross beam (7-4).

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