CN111287083A

CN111287083A - Bridge cable detection equipment

Info

Publication number: CN111287083A
Application number: CN202010209722.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Tiantai Weimian Intelligent Technology Co Ltd
Current assignee: Tiantai Weimian Intelligent Technology Co Ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-06-16

Abstract

The invention discloses bridge cable detection equipment which comprises a rack, wherein a driving cavity is arranged in the rack, a driving structure is arranged in the driving cavity, a steering cavity is arranged on the top wall in the driving cavity, a steering mechanism is arranged in the steering cavity, a hydraulic cavity is communicated with the inner wall of the left side of the driving cavity, a hydraulic mechanism is arranged in the hydraulic cavity, a first through hole with a downward opening is formed in the bottom wall in the driving cavity, a clamping mechanism and a transmission mechanism are arranged below the driving cavity, and crawling mechanisms are symmetrically arranged at the front and back of the bottom of the right side of the rack; the device can realize the omnibearing inspection of the outer surface of the bridge cable, greatly improve the safety of the bridge, simultaneously reduce the accident rate of inspectors, and can also perform a certain cleaning action on the cable, thereby improving the service life of the cable; the equipment has higher automation degree, is very convenient to use and is convenient to produce, popularize and use.

Description

Bridge cable detection equipment

Technical Field

The invention relates to the field of bridge detection, in particular to bridge cable detection equipment.

Background

Cable bridges are used in large numbers in cities and highways. And the key point of the cable bridge, namely the cable, if the cable is not maintained regularly, the conditions of cracking, peeling, damage, winding, damage and the like are likely to occur, even major safety accidents can be caused when the conditions are severe, and the cable has a protective layer on the surface and is very smooth due to the large inclination of the cable, so that the cable is not beneficial to the maintenance of workers. In this case, an automatic bridge cable inspection apparatus is necessary.

Disclosure of Invention

The invention aims to solve the technical problem of providing bridge cable detection equipment, which solves the problems of difficulty in maintenance, single function and the like, reduces the difficulty in maintenance of bridge cables and increases a cleaning function.

The invention is realized by the following technical scheme.

The invention relates to bridge cable detection equipment, which comprises a rack, wherein a driving cavity is arranged in the rack, a driving structure is arranged in the driving cavity, a steering cavity is arranged on the top wall in the driving cavity, a steering mechanism is arranged in the steering cavity, a hydraulic cavity is communicated with the inner wall on the left side of the driving cavity, a hydraulic mechanism is arranged in the hydraulic cavity, a first through hole with a downward opening is arranged on the bottom wall in the driving cavity, a clamping mechanism and a transmission mechanism are arranged below the driving cavity, crawling mechanisms are symmetrically arranged at the front and back of the bottom on the right side of the rack, the driving structure comprises a motor fixedly arranged in the inner wall on the right side of the driving cavity, the end surface on the left side of the motor is in power connection with a worm, a driving gear is fixedly arranged on the worm, a driven shaft is arranged on the front, a first chain wheel positioned at the front side of the worm wheel is fixedly arranged on the driven shaft, a first spline shaft positioned above the worm is arranged on the left end wall and the right end wall of the driving cavity in a rotating fit manner, a driven gear engaged with the driving gear is fixedly arranged on the first spline shaft, a first electromagnet is fixedly arranged on the right end surface of the driven gear, a duplex bevel gear is arranged on the first spline shaft in a spline fit manner, a first permanent magnet is fixedly arranged on the left end face of the duplex bevel gear, a first spring is fixedly arranged between the duplex bevel gear and the driven gear, a second permanent magnet is fixedly arranged on the right end face of the duplex bevel gear, the right end of the first spline shaft is fixedly provided with a rotating disc, the left end face of the rotating disc is fixedly provided with a second electromagnet, and a second spring is fixedly arranged between the right end face of the second permanent magnet and the rotating disc.

Furthermore, the steering mechanism comprises a steering shaft which is rotatably arranged between the steering cavity and the driving cavity, a conical gear is fixedly arranged on the steering shaft in the driving cavity, a steering gear is fixedly arranged on the steering shaft in the steering cavity, a semicircular gear meshed with the steering gear is installed in the steering cavity in a rotating fit manner, cameras are symmetrically arranged on the front and back of the upper end surface of the semicircular gear, and real-time data interaction can be carried out between the cameras and the outside.

Further, the hydraulic mechanism comprises a screw rod which is installed in the left side wall of the hydraulic cavity in a rotating fit manner, a thread block is installed on the screw rod in a threaded fit manner, a sliding gear which is matched with the driven gear is arranged in the hydraulic cavity, a spline hole is formed in the sliding gear, a second spline shaft is installed in the spline hole in a spline fit manner, the right side end of the second spline shaft is connected with the right side wall of the hydraulic cavity in a rotating fit manner, the left side end of the second spline shaft is fixedly connected with the right side end of the screw rod, a conical ring is fixedly arranged on the left side end surface of the sliding gear, a third spring and a third electromagnet are fixedly arranged on the top wall of the inner wall of the hydraulic cavity, a third permanent magnet is fixedly arranged at the bottom of the third spring, an inclined plane which is used for pushing the conical ring to move rightwards is arranged at the bottom of the third permanent magnet, and a fourth spring which is abutted against the right side, the hydraulic pressure chamber left side inner wall is equipped with first hydraulic pressure chamber, slidable mounting has first piston rod in the hydraulic pressure chamber, first piston rod right-hand member with screw thread piece left side terminal surface fixed connection, first hydraulic pressure intracavity diapire is equipped with first oil pipe.

Further, clamping mechanism including set up in the second hydraulic pressure chamber in the drive chamber left side inner wall, the second hydraulic pressure chamber passes through second oil pipe intercommunication with first hydraulic pressure chamber, the bottom wall is equipped with the second through-hole that the opening is decurrent in the second hydraulic pressure chamber, slidable mounting has the second piston rod in the second hydraulic pressure chamber, the fixed first support that is equipped with in first through-hole left side chamber wall, running fit installs first pendulum rod on the first support, first pendulum rod upper end is rotated with the second piston rod and is connected, the dabber is installed to the terminal running fit of first pendulum rod, the fixed action wheel that is equipped with of dabber, fixed first brush wheel that is equipped with on both sides around the dabber.

Further, the transmission mechanism comprises a second chain wheel installed on the first support in a rotating fit mode and a cross rod fixedly arranged at the lower end of the first support, a tensioning wheel is arranged at the right end of the cross rod in a rotating fit mode, a third chain wheel is arranged at the front end of the mandrel, and the transmission mechanism is connected with the first chain wheel, the second chain wheel, the third chain wheel and the tensioning wheel through chains in a transmission mode.

Further, the mechanism of crawling including set up in the third hydraulic pressure chamber of drive chamber frame right side bottom, third hydraulic pressure chamber passes through third oil pipe intercommunication with first hydraulic pressure chamber, third hydraulic pressure intracavity diapire is equipped with the third through-hole that the opening is decurrent, slidable mounting has the third piston rod in the third hydraulic pressure chamber, the fixed second support that is equipped with of diapire in the third through-hole, the second pendulum rod is installed to normal running fit on the second support, second pendulum rod upper end is rotated with the third piston rod and is connected, the follower is installed to second pendulum rod lower extreme normal running fit, the fixed second brush wheel that is equipped with in follower both sides, the action wheel with the cable can be hugged closely to the follower.

Further, the magnetic force of the second permanent magnet is greater than the elastic force of the second spring, and the magnetic force of the first permanent magnet is greater than the elastic force of the first spring.

The invention has the beneficial effects that: the bridge cable detection equipment provided by the invention can realize omnibearing detection on the outer surface of a bridge cable, so that the safety of a bridge is greatly improved, the accident rate of inspectors is reduced, the equipment can also perform a certain cleaning action on the cable, and the service life of the cable is prolonged; the equipment has higher automation degree, is very convenient to use and is convenient to produce, popularize and use.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the bridge cable detection device of the present invention.

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1;

FIG. 4 is an enlarged schematic view of the structure at C in FIG. 1;

fig. 5 is a left side view of fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

Referring to fig. 1-5, the bridge cable detection apparatus includes a frame 10, a driving cavity 44 is provided in the frame 10, a driving structure 101 is provided in the driving cavity 44, a steering cavity 26 is provided on an inner top wall of the driving cavity 44, a steering mechanism 102 is provided in the steering cavity 26, a hydraulic cavity 14 is provided on an inner wall of a left side of the driving cavity 44 in a communicating manner, a hydraulic mechanism 103 is provided in the hydraulic cavity 14, a first through hole 203 with a downward opening is provided on an inner bottom wall of the driving cavity 44, a clamping mechanism 104 and a transmission mechanism 105 are provided below the driving cavity 44, crawling mechanisms 106 are symmetrically provided on a bottom of a right side of the frame 10 in a front-back manner, the driving structure 101 includes a motor 45 fixedly provided in an inner wall of a right side of the driving cavity 44, a left end face of the motor 45 is in power connection with a worm 46, a driving gear 47 is fixedly provided on, a worm wheel 50 engaged with the worm 45 is fixedly arranged on the driven shaft 52, a first chain wheel 51 positioned at the front side of the worm wheel 50 is fixedly arranged on the driven shaft 52, a first spline shaft 34 positioned above the worm 45 is rotatably fitted and installed on the left and right end walls of the driving cavity 44, a driven gear 40 engaged with the driving gear 47 is fixedly arranged on the first spline shaft 34, a first electromagnet 41 is fixedly arranged on the right end surface of the driven gear 40, a duplex bevel gear 33 is spline fitted and installed on the first spline shaft 34, a first permanent magnet 43 is fixedly arranged on the left end surface of the duplex bevel gear 33, a first spring 42 is fixedly arranged between the duplex bevel gear 33 and the driven gear 40, a second permanent magnet 38 is fixedly arranged on the right end surface of the duplex bevel gear 33, and a rotating disc 35 is fixedly arranged on the right end of the first spline shaft 34, a second electromagnet 36 is fixedly arranged on the left end face of the rotating disc 35, and a second spring 37 is fixedly arranged between the right end face of the second permanent magnet 38 and the rotating disc 35.

Advantageously, the steering mechanism 102 includes a steering shaft 28 rotatably disposed between the steering cavity 26 and the driving cavity 44, a conical gear 32 is fixedly disposed on the steering shaft 28 in the driving cavity 44, a steering gear 27 is fixedly disposed on the steering shaft 28 in the steering cavity 26, a semicircular gear 29 engaged with the steering gear 27 is rotatably fitted in the steering cavity 26, a camera 70 is symmetrically disposed in front of and behind an upper end surface of the semicircular gear 29, and the camera 70 can perform real-time data interaction with the outside.

Beneficially, the hydraulic mechanism 103 includes a screw rod 15 installed in the left side wall of the hydraulic chamber 14 in a rotationally matching manner, a threaded block 13 is installed on the screw rod 15 in a threaded manner, a sliding gear 20 matched with the driven gear 40 is arranged in the hydraulic chamber 14, a spline hole is arranged in the sliding gear 20, a second spline shaft 90 is installed in the spline hole in a spline matching manner, the right side end of the second spline shaft 90 is connected with the right side wall of the hydraulic chamber 14 in a rotationally matching manner, the left side end of the second spline shaft 90 is fixedly connected with the right side end of the screw rod 15, a conical ring 16 is fixedly arranged on the left end face of the sliding gear 20, a third spring 18 and a third electromagnet 19 are fixedly arranged on the inner top wall of the hydraulic chamber 14, a third permanent magnet 17 is fixedly arranged at the bottom of the third spring 18, an inclined plane for pushing the conical ring 16 to move rightward is arranged at the bottom of the third permanent magnet 17, the right end face of the sliding gear 20 is provided with a fourth spring 21 which is abutted against the right side wall of the hydraulic cavity 14, the inner wall of the left side of the hydraulic cavity 14 is provided with a first hydraulic cavity 11, a first piston rod 12 is slidably mounted in the hydraulic cavity 11, the right end of the first piston rod 12 is fixedly connected with the left end face of the thread block 13, and the inner wall of the first hydraulic cavity 11 is provided with a first oil pipe 22.

Beneficially, the clamping mechanism 104 includes a second hydraulic chamber 48 disposed in the inner wall of the left side of the driving chamber 44, the second hydraulic chamber 48 is communicated with the first hydraulic chamber 11 through a second oil pipe 25, a second through hole 204 with a downward opening is disposed in the inner wall of the second hydraulic chamber 48, a second piston rod 49 is slidably mounted in the second hydraulic chamber 48, a first bracket 54 is fixedly disposed on the left chamber wall of the first through hole 203, a first swing rod 53 is rotatably mounted on the first bracket 54, the upper end of the first swing rod 53 is rotatably connected with the second piston rod 49, a mandrel 62 is rotatably mounted at the end of the first swing rod 53, a driving wheel 60 is fixedly disposed on the mandrel 62, and first brush wheels 59 are fixedly disposed on the front side and the rear side of the mandrel 62.

Advantageously, the transmission mechanism 105 includes a second sprocket 55 rotatably fitted on the first bracket 54 and a cross bar 56 fixedly disposed at the lower end of the first bracket 54, a tension wheel 57 is rotatably disposed at the right end of the cross bar 56, a third sprocket 61 is disposed at the front end of the mandrel 62, and the transmission mechanism 105 is drivingly connected to the first sprocket 51, the second sprocket 55, the third sprocket 61 and the tension wheel 57 through a chain 58.

Beneficially, the crawling mechanism 106 includes a third hydraulic chamber 63 disposed at the bottom of the right side of the driving chamber frame 10, the third hydraulic chamber 63 is communicated with the first hydraulic chamber 11 through a third oil pipe 23, a third through hole 205 with a downward opening is formed in a bottom wall of the third hydraulic chamber 63, a third piston rod 64 is slidably mounted in the third hydraulic chamber 63, a second bracket 65 is fixedly disposed on the bottom wall of the third through hole 205, a second swing rod 66 is rotatably mounted on the second bracket 65 in a matched manner, the upper end of the second swing rod 66 is rotatably connected with the third piston rod 64, a driven wheel 67 is rotatably mounted at the lower end of the second swing rod 66 in a matched manner, second brush wheels 68 are fixedly disposed on two sides of the driven wheel 67, and the driving wheel 60 and the driven wheel 67 can hold the cable 71 tightly.

Advantageously, the magnetic force of the second permanent magnet 43 is greater than the elastic force of the second spring 37, and the magnetic force of the first permanent magnet 38 is greater than the elastic force of the first spring 42.

In an initial state, the motor 45 is in an off state, the first electromagnet 41 and the second electromagnet 36 are not powered, the duplex bevel gear 33 is in a middle position, the duplex bevel gear 33 is not meshed with the bevel gear 32, the third electromagnet 19 is not powered, the driven gear 40 is not meshed with the sliding gear 20, the first piston rod 12 is in an extended state, the second piston rod 49 is in a retracted state, the third piston rod 64 is in a retracted state, and the driving wheel 60 and the driven wheel 67 are in a maximum open state;

during installation, the cable 71 is placed in a space formed by the driving wheel 60 and the driven wheel 67, the motor 45 is started to rotate, the motor 45 drives the worm 46 to rotate, the worm 46 drives the driving gear 47 to rotate, the driving gear 47 drives the driven gear 40 to rotate, the driven gear 40 drives the first spline shaft 34 to rotate, the first spline shaft 34 drives the duplex bevel gear 33 to rotate, the first spline shaft 34 drives the rotating disc 35 to rotate, the first electromagnet 41 and the second electromagnet 36 are not electrified, the duplex bevel gear 33 is not meshed with the bevel gear 32, the third electromagnet 19 is electrified to enable the third permanent magnet 17 to move downwards, the third permanent magnet 17 drives the bevel ring 16 to move horizontally rightwards, the bevel ring 16 drives the sliding gear 20 to move horizontally and be meshed with the driven gear 40, the sliding gear 20 is rotated, the sliding gear 20 drives the second spline shaft 90 to rotate, the second spline shaft 90 drives the screw rod 15 to rotate, the screw rod 15 drives the thread block 13 to move, the thread block 13 is limited by the first piston rod 12, so that the thread block 13 moves horizontally leftwards, the thread block 13 drives the first piston rod 12 to move horizontally leftwards in the first hydraulic cavity 11, the space of the first hydraulic cavity 11 becomes smaller, so that hydraulic oil is extruded from the first oil pipe 22, the hydraulic oil extruded from the first oil pipe 22 passes through the first oil pipe 25 to the second hydraulic cavity 48, so that the pressure in the second hydraulic cavity 48 becomes larger, so that the second piston rod 49 is driven to extend, the second piston rod 49 drives the first swing rod 53 to move, and the first swing rod 53 rotates under the limiting action of the first support 54, the first swing link 53 drives the driving wheel 60 to move forward, hydraulic oil extruded from the first oil pipe 22 passes through the third oil pipe 23 to reach the third hydraulic chamber 63, so that the pressure of the third hydraulic chamber 63 is increased to drive the third piston rod 64 to extend out, the third piston rod 64 drives the second swing link 66 to move, the second swing link 66 rotates under the restriction action of the second bracket 65, the second swing link 66 drives the driven wheel 67 to move forward, the driven wheel 67 clamps the cable 71 under the combined action of the driving wheel 60, at this time, the third electromagnet 19 is de-energized to move the third permanent magnet 17 upward, and the fourth spring 21 pushes the sliding gear 20 to move horizontally rightward to separate from the driven gear 40;

during cleaning, the worm 46 drives the worm wheel 50 to rotate, the worm wheel 50 drives the driven shaft 52 to rotate, the driven shaft 52 drives the first chain wheel 51 to rotate, the first chain wheel 51 drives the chain 58 to rotate, the chain 58 drives the second chain wheel 55, the tension wheel 57, the third chain wheel 61 drives the mandrel 62 to rotate, the mandrel 62 drives the first brush wheel 59 to rotate, the first brush wheel 59 cleans dust on the surface of the cable 71, and the mandrel 62 drives the driving wheel 60 to rotate, so that the equipment crawls on the cable 71;

in the first detection stage, the first electromagnet 41 is powered on to enable the first permanent magnet 43 to move leftward, the first permanent magnet 43 enables the duplex bevel gear 33 to move leftward, the bevel gear at the left end of the duplex bevel gear 33 is meshed with the bevel gear 32, the bevel gear 32 rotates, the bevel gear 32 drives the steering shaft 28 to rotate, the steering shaft 28 drives the steering gear 27 to rotate, the steering gear 27 drives the semicircular gear 29 to rotate, the semicircular gear 29 drives the camera 70 to shoot the cable 71, and at this time, an operator can observe whether a damaged part exists on a shot picture in real time through communication equipment on the ground;

5: in the second detection stage, the second electromagnet 36 is powered on, so that the second permanent magnet 38 moves rightwards, the first permanent magnet 43 moves rightwards the duplex bevel gear 33, so that the bevel gear at the right end of the duplex bevel gear 33 is meshed with the bevel gear 32, the bevel gear 32 rotates, the bevel gear 32 drives the steering shaft 28 to rotate, the steering shaft 28 drives the steering gear 27 to rotate, the steering gear 27 drives the semicircular gear 29 to rotate, the semicircular gear 29 drives the camera 70 to shoot the cable 71, and at this time, an operator can observe whether a shot picture is damaged in real time through communication equipment on the ground.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a bridge cable check out test set, includes the frame, be equipped with the drive chamber in the frame, be equipped with drive structure, its characterized in that in the drive chamber: the top wall in the driving cavity is provided with a steering cavity, the steering cavity is internally provided with a steering mechanism, the left side inner wall of the driving cavity is communicated with a hydraulic cavity, the hydraulic cavity is internally provided with a hydraulic mechanism, the bottom wall in the driving cavity is provided with a first through hole with a downward opening, a clamping mechanism and a transmission mechanism are arranged below the driving cavity, the front and the back of the right side bottom of the rack are symmetrically provided with crawling mechanisms, the driving structure comprises a motor fixedly arranged in the right side inner wall of the driving cavity, the left side end face of the motor is in power connection with a worm, a driving gear is fixedly arranged on the worm, the front and the back end walls of the driving cavity are in running fit with a driven shaft, the driven shaft is fixedly provided with a worm wheel meshed with the worm, the driven shaft is fixedly provided with a first chain wheel positioned in front of the worm wheel, fixed be equipped with on the first integral key shaft with driving gear engaged with driven gear, the fixed first electro-magnet that is equipped with on the driven gear right-hand member face, the double cone gear is installed in the spline fit on the first integral key shaft, the fixed first permanent magnet that is equipped with of double cone gear left end face, double cone gear with fixed first spring that is equipped with between the driven gear, the fixed second permanent magnet that is equipped with of double cone gear right-hand member face, the fixed rolling disc that is equipped with on the first integral key shaft right-hand member, the fixed second electro-magnet that is equipped with of rolling disc left end face, second permanent magnet right-hand member face with the fixed second spring that is equipped with between the rolling disc.

2. The bridge cable inspection device of claim 1, wherein: the steering mechanism comprises a steering shaft which is rotatably arranged between the steering cavity and the driving cavity, a conical gear is fixedly arranged on the steering shaft in the driving cavity, a steering gear is fixedly arranged on the steering shaft in the steering cavity, a semicircular gear meshed with the steering gear is installed in the steering cavity in a rotating fit mode, cameras are symmetrically arranged on the front and back of the upper end face of the semicircular gear, and real-time data interaction can be carried out between the cameras and the outside.

3. The bridge cable inspection device of claim 2, wherein: the hydraulic mechanism comprises a screw rod which is arranged in the left side wall of the hydraulic cavity in a rotating fit manner, a thread block is arranged on the screw rod in a threaded fit manner, a sliding gear matched with the driven gear is arranged in the hydraulic cavity, a spline hole is formed in the sliding gear, a second spline shaft is arranged in the spline hole in a spline fit manner, the right side end of the second spline shaft is connected with the right side wall of the hydraulic cavity in a rotating fit manner, the left side end of the second spline shaft is fixedly connected with the right side end of the screw rod, a conical ring is fixedly arranged on the left end surface of the sliding gear, a third spring and a third electromagnet are fixedly arranged on the top wall of the inner wall of the hydraulic cavity, a third permanent magnet is fixedly arranged at the bottom of the third spring, an inclined plane for pushing the conical ring to move rightwards is arranged at the bottom of the third permanent magnet, a fourth spring which is abutted against the right side wall of the hydraulic cavity, the hydraulic pressure chamber left side inner wall is equipped with first hydraulic pressure chamber, slidable mounting has first piston rod in the hydraulic pressure chamber, first piston rod right-hand member with screw thread piece left side terminal surface fixed connection, first hydraulic pressure intracavity diapire is equipped with first oil pipe.

4. The bridge cable inspection device of claim 3, wherein: clamping mechanism including set up in second hydraulic chamber in the inner wall of drive chamber left side, second hydraulic chamber passes through second oil pipe intercommunication with first hydraulic chamber, the bottom wall is equipped with the second through-hole that the opening is decurrent in the second hydraulic chamber, slidable mounting has the second piston rod in the second hydraulic chamber, the fixed first support that is equipped with in first through-hole left side chamber wall, normal running fit installs first pendulum rod on the first support, first pendulum rod upper end is rotated with the second piston rod and is connected, the dabber is installed to the terminal normal running fit of first pendulum rod, the fixed action wheel that is equipped with in the spindle, the fixed first brush wheel that is equipped with on both sides around the dabber.

5. The bridge cable inspection device of claim 4, wherein: the transmission mechanism comprises a second chain wheel which is installed on the first support in a rotating fit mode and a cross rod which is fixedly arranged at the lower end of the first support, a tensioning wheel is arranged at the right end of the cross rod in a rotating mode, a third chain wheel is arranged at the front end of the mandrel, and the transmission mechanism is connected with the first chain wheel, the second chain wheel, the third chain wheel and the tensioning wheel through chain transmission.

6. The bridge cable inspection device of claim 5, wherein: crawling the mechanism including set up in the third hydraulic pressure chamber of drive chamber frame right side bottom, third hydraulic pressure chamber passes through third oil pipe intercommunication with first hydraulic pressure chamber, third hydraulic pressure intracavity diapire is equipped with the third through-hole that the opening is decurrent, slidable mounting has the third piston rod in the third hydraulic pressure chamber, the fixed second support that is equipped with of diapire in the third through-hole, the second pendulum rod is installed to normal running fit on the second support, second pendulum rod upper end is connected with the rotation of third piston rod, the follower is installed to second pendulum rod lower extreme normal running fit, the fixed second brush wheel that is equipped with in follower both sides, the action wheel with the cable can be held tightly to the follower.

7. The bridge cable inspection device of claim 6, wherein: the magnetic force of the second permanent magnet is greater than the elastic force of the second spring, and the magnetic force of the first permanent magnet is greater than the elastic force of the first spring.