CN111633663A - Camera lifting system for cable trench inspection robot - Google Patents

Abstract

The invention belongs to the technical field of cable inspection, and particularly relates to a camera lifting system for a cable trench inspection robot. The invention comprises a base and a four-bar-like connecting rod assembly, wherein a stroke block is arranged on the base; the bottom end of a first rocker of the simulated four-bar connecting rod assembly extends downwards and is in hinged fit with the stroke block; the bottom end of the first connecting rod is fixedly connected with the end part of the base behind the stroke block, and the top end of the first connecting rod extends forwards and is in hinged fit with the bottom end of the supporting rod; the top end of the first rocker is hinged with a first sliding sleeve, and a first sliding sleeve sliding rail is matched with the first connecting rod; the tail end of the second connecting rod is hinged to the middle section of the rod body of the first rocker, the top end of the second connecting rod is hinged to the bottom end of the second rocker, the top end of the second rocker is hinged to a second sliding sleeve, and a second sliding sleeve sliding rail is matched with the supporting rod; the top end of the supporting rod is fixedly connected with a camera shooting component. The invention can provide foundation guarantee for the subsequent wall penetrating operation of the cable tunnel inspection robot.

Description

Camera lifting system for cable trench inspection robot

Technical Field

The invention belongs to the technical field of cable inspection, and particularly relates to a camera lifting system for a cable trench inspection robot.

Background

The occurrence of cable tunnel fires is a gradual cumulative process. With the increase of time, the local temperature of the cable gradually rises due to the aging of the insulating layer, the accumulation of dust and oil, the loosening of the intermediate joint and the like, so that a fire disaster is caused. Before the accident happens, if the conditions such as temperature, smoke and the like in the cable tunnel can be effectively monitored in real time, the fire disaster can be prevented in the bud. Although the monitoring problem of cable tunnels has been attracting attention, no reasonable solution has been found.

The traditional cable tunnel adopts a manual inspection mode. At regular intervals, patrolling personnel enter the tunnel and manually check the temperature condition of the cable intermediate joint by using a temperature measuring instrument. This method wastes a lot of manpower. Meanwhile, due to the limitation of a manual mode, each intermediate joint is difficult to detect every time, only the position where the temperature rises quickly can be checked, the trouble can not be prevented in the bud, and the real prevention effect cannot be achieved.

Later, a thermal sensing wire is adopted to match with a monitoring system to perform online monitoring on a cable, specifically, a thermal sensing wire is closely attached to the cable in the cable arrangement direction to extend, so as to perform high-temperature point detection. However, the thermal wire has drawbacks in that: first, the cables located at two sides in the cable tunnel are bundled and arranged in bundles, the thermal sensing wires can only monitor the high temperature change of the adjacent cables which are closely attached, and the monitoring effect of the temperature change of the cable located at the farthest end is very poor. Secondly, when the thermal sensing wires are arranged, the thermal sensing wires have certain rigidity and elasticity, so the thermal sensing wires are often wavy and are difficult to cling to the cable, and even the cable close to the thermal sensing wires is often provided with monitoring holes due to the non-uniformity of gaps between the thermal sensing wire bodies and the cable.

Still later, tunnel inspection robots began to become popular. The concrete mechanism of robot is patrolled and examined in the invention patent application that the name of bulletin number "CN 107046252A" is "a cable channel intelligence patrols and examines robot" and the utility model patent application that the name of bulletin number "CN 207691316U" is "a cable channel robot patrols and examines system" all describe to some extent, and the major structure is: including the body and supply the track that the body removed, the track install in the both sides of body downside provide the power by the battery, are provided with control system and control cloud platform on the body, control system include main control unit and with main control unit intercommunication connection's transmission communication antenna, control cloud platform include with main control unit intercommunication connection's high definition camera and thermal imager. The functions are as follows: transmitting working state pictures of cables in the tunnel, temperature and humidity in the tunnel, surface temperature of the power cables and other parameters to technicians outside the tunnel in real time through a wireless network; when the state parameters are abnormal, technicians outside the tunnel can determine that potential safety hazards exist in the power cable at the position where the robot is located, and therefore the technicians can be organized to maintain the corresponding positions. The tunnel inspection robot has excellent use effect, but the following problems which cannot be solved are still existed: on one hand, when cables are assembled in the cable tunnel, a thick and heavy firewall is poured in the cable tunnel at intervals of specified length in consideration of the fire condition, so that the cable tunnel is isolated into individual tunnel units to achieve the purpose of physical isolation in the case of fire. The existence of the firewall ensures that the flow of taking out the tunnel inspection robot from the previous tunnel unit, resetting the cover plate on the previous tunnel unit, removing the cover plate of a new tunnel unit and putting the new tunnel inspection robot into the tunnel inspection robot is continuously repeated when the tunnel inspection robot inspects the tunnel each time, the operation is extremely complicated, the physical labor is huge, and the actual inspection efficiency is obviously severely restricted. On the other hand, the cables in the cable tunnel are arranged in a bundle, so that a certain height exists, the inspection height of the traditional tunnel inspection robot is constant, certain cable dead corners cannot be inspected inevitably, inspection holes are caused, and potential safety hazards exist.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a camera lifting system for a cable trench inspection robot, which is reasonable and practical in structure.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a cable pit patrols and examines camera operating system for robot which characterized in that: the camera lifting system comprises a base, wherein a stroke block capable of performing reciprocating linear displacement along the length direction of a cable trench is arranged on the base; the camera upgrading system also comprises an imitated four-bar connecting rod assembly; the bottom end of a first rocker of the simulated four-bar connecting rod assembly extends downwards and is in hinged fit with the stroke block; the bottom end of the first connecting rod is fixedly connected with the end part of the base behind the stroke block, and the top end of the first connecting rod extends forwards and is in hinged fit with the bottom end of the supporting rod; the top end of the first rocker is hinged with a first sliding sleeve, and a first sliding sleeve sliding rail is matched with the first connecting rod; the tail end of the second connecting rod is hinged to the middle section of the rod body of the first rocker, the top end of the second connecting rod is hinged to the bottom end of the second rocker, the top end of the second rocker is hinged to a second sliding sleeve, a sliding rail of the second sliding sleeve is matched with the supporting rod, and the axes of the hinged parts are horizontally arranged and are parallel to each other; the top end of the supporting rod is fixedly connected with a camera shooting assembly.

Preferably, the linear displacement unit comprises a displacement motor and a displacement screw rod coaxially and fixedly connected to an output shaft of the displacement motor, and the stroke block is in threaded fit with the displacement screw rod; the displacement motor is positioned at the rear part of the base, an extension frame extends outwards from the rear part of the base along the length direction of the base, and a hinge seat is arranged on the extension frame so as to be hinged with the bottom end of the first connecting rod; the hinge point height of the bottom end of the first connecting rod is higher than that of the hinge point of the bottom end of the first rocker.

Preferably, a supporting block for supporting the supporting rod is arranged at the position, close to the bottom end, of the rod body of the first connecting rod, and a placing groove for placing the supporting rod conveniently is formed in the supporting block in a concave mode.

Preferably, the camera shooting assembly comprises a camera shooting seat and a rotating block horizontally hinged to the camera shooting seat, a first torsion motor is arranged on the rotating block, and an output shaft of the first torsion motor vertically extends upwards and is fixedly connected with the camera so as to drive the camera to rotate; the rotating block is driven by a second torsion motor arranged on the camera seat to generate pitching motion.

The invention has the beneficial effects that:

1) due to the fire condition, a thick and heavy firewall is arranged in the cable tunnel at intervals of specified length, so that the cable tunnel is isolated into tunnel units one by one to achieve the purpose of physical isolation in the case of fire; however, in consideration of the drainage problem, a drainage ditch is formed at the center line of the ground of the cable tunnel, and the drainage ditch penetrates through the firewall so as to drain water.

On the basis of the current situation, the invention considers and designs a camera lifting system for a cable trench inspection robot, so that the camera lifting height can be controlled on one hand, and the camera lifting system can be adjusted on site specifically according to different harness heights, thereby ensuring the purposes of multi-angle and multi-position scanning and shooting of cables bundled and arranged in bundles, and finally ensuring the monitoring effect. On the other hand, on the premise of meeting the basic requirements, the minimum of the volume after storage can be synchronously ensured, so that the foundation guarantee is provided for the subsequent wall penetrating operation of the cable tunnel inspection robot.

More specifically, the base is used as a carrier, the linear displacement unit is used as a driving source on the base, the first rocker, the first connecting rod, the second rocker and the second connecting rod form a parallel double-crank type simulated four-bar connecting rod assembly, and a supporting rod with a camera shooting assembly is arranged on the simulated four-bar connecting rod assembly; therefore, the base with the linear displacement unit, the simulated four-link assembly with the parallel double-crank function and the support rod with the camera component form a three-dimensional support system from bottom to top together, and the retractable function of the system can be finally realized under the actions of the simulated four-link assembly and the corresponding sliding sleeve. When needed, the stroke block acts through the action of the driving source, namely the linear displacement unit, so that the imitated four-bar linkage assembly is supported, and the height adjustable function of the camera shooting assembly is ensured; when accomodating, the stroke piece return stroke drives imitative four-bar linkage assembly and lies prone down for the subassembly of making a video recording descends and finally reaches the volume minimizing purpose, and its work is very reliable stable.

2) For the linear displacement unit, linear motion of moving the stroke block can be realized by driving a gear rack to move by a motor, a guide motion function of the stroke block can be ensured by a crank-slider structure, and even motion effect can be ensured by a mode of driving the stroke block on a guide rail by an air cylinder. In consideration of the reliability of work and the compactness and the small size of the work, the invention preferably adopts a mode that the displacement motor is matched with the displacement screw rod, thereby ensuring the reciprocating action function of the stroke block. First connecting rod bottom end pin joint height is higher than the bottom pin joint height of first rocker, and this makes whole mechanism lie prone down when contracting, can laminate completely draw in on the base, and the minimizing of volume can be effectively guaranteed.

3) The arrangement of the supporting block and the placing groove is to consider that the supporting rod is completely hinged on the top end of the first connecting rod by self rigidity, and the straightening performance of the rod body is ensured by the supporting action of the second rocker. And when whole mechanism was bent over and is retracted, the bracing piece was because the top has born the weight of the subassembly of making a video recording, consequently directly falls or probably damages the subassembly of making a video recording, perhaps leads to the bracing piece pole body impaired because of the striking. According to the invention, the supporting blocks are arranged, so that the supporting rod can just fall into the placing groove of the supporting block when falling, and on one hand, the reliable protection effect on the supporting rod and the camera shooting assembly is ensured; on the other hand, the placing reliability of the supporting rod when the whole structure is in a volume minimized state is also ensured, so that the situation that the subsequent normal work is influenced by the position deflection caused by the jolt of the cable trench road surface and the like is avoided, and multiple purposes are achieved.

4) And after the camera shooting assembly is jacked to a preset height, the camera can generate pitching motion through the driving of the second torsion motor, so that the camera can be ensured to always observe the cable in real time in a horizontal state. Meanwhile, the camera can also generate rotation action through the first torsion motor so as to realize the aim of multi-angle observation at a fixed point, and the observation accuracy and reliability can be obviously improved.

Drawings

FIGS. 1 and 2 are schematic perspective views of one embodiment of the present invention in a travel position;

FIGS. 3 and 4 are schematic perspective views of one embodiment of the present invention in a deployed position;

FIGS. 5 and 6 are schematic perspective views of the base deployment system in a deployed position;

FIG. 7 is a schematic perspective view of the jacking assembly;

FIG. 8 is a schematic perspective view of the deployment system in the advanced position;

FIG. 9 is a schematic perspective view of the base deployment system in a deployed position;

FIG. 10 is a schematic perspective view of the structure shown in FIG. 9 with the running assembly removed;

FIG. 11 is an exploded view of the structure of FIG. 10;

FIG. 12 is an enlarged view of a portion I of FIG. 11;

FIG. 13 is a deployed attitude view of the present invention;

FIGS. 14 and 16 are schematic perspective views of the present invention in a travel position;

fig. 15 and 17 are schematic perspective views of the present invention in the unfolded position.

The actual correspondence between each label and the part name of the invention is as follows:

11-bottom plate 12-power source 13-moving block 14-cantilever plate

14 a-upper suspension plate 14 b-lower suspension plate 14 c-reinforcing plate 14 d-vertical convex column

15-walking assembly 16-jacking assembly

16 a-a top block 16 b-a first swing link 16 c-a second swing link

16 d-swing arm motor 16 e-transverse pull rod

17-bidirectional screw rod 18-top plate 19-guide sliding groove

21-stroke block 22-imitated four-connecting-rod assembly

22 a-first rocker 22 b-first connecting rod 22 c-first sliding sleeve

22 d-second connecting rod 22 e-second rocker 22 f-second sliding sleeve

23-support bar 24-camera assembly

24 a-camera seat 24 b-rotating block 24 c-camera 24 d-second torsion motor

25-displacement screw rod 26-displacement motor

30-sensing part 40-extending frame 50-supporting block 51-placing groove 60-synchronizing gear

Detailed Description

The invention is embodied as part of a cable trench inspection robot. Thus, to facilitate an overall understanding, the structure and operation of particular embodiments of the entire trench inspection robot are described herein as follows:

the cable trench inspection robot, as shown in fig. 1-17, has a body portion including a base deployment system and a camera lift system disposed on the base deployment system. Wherein:

first, base deployment system

The base deployment system, as shown in fig. 1-12, includes a deployment assembly for causing the traveling assembly 15 to extend so as to travel at the cable tunnel ground in a traveling attitude, and causing the traveling assembly 15 to return to a traveling state so as to retract the width of the trench, and a jacking assembly 16 for causing the entire system to rise above the trench and fall so as to retract into the trench.

As shown in fig. 9 to 12, the unfolding assembly includes a set of top plates 18, a set of bottom plates 11, a set of driving motors, i.e., power sources 12, two sets of bidirectional screw rods 17, four sets of moving blocks 13, and four cantilever plates 14. During actual assembly, the top plate 18 and the bottom plate 11 are both rectangular plate-shaped, the plate surfaces of the top plate 18 and the bottom plate 11 are horizontally arranged, and a gap between the top plate 18 and the bottom plate 11 forms an installation space for the driving motor, the bidirectional screw rod 17, the moving block 13 and the cantilever plate 14. The two groups of bidirectional screw rods 17 are arranged in parallel and parallel to the plate length direction of the bottom plate 11, and the same ends of the two groups of bidirectional screw rods 17 are in power connection or in gear engagement with the same group of driving motors. After the moving block 13 is matched with the thread section of the bidirectional screw rod 17, the fixed end of the cantilever plate 14 is hinged through a first vertical hinge shaft, and the cantilever end of the cantilever plate 14 is hinged to the walking part through a second vertical hinge shaft. In fig. 8-9, the traveling assembly 15 is a track wheel, and the cantilever end of the cantilever plate 14 is directly hinged to a fixed block on the track wheel. Because of the length of the track wheels, the two sets of cantilever shoes 14 located on the same side of the base plate 11 can be matched with one set of track wheels together to ensure the stability and accuracy of the system during traveling.

As shown in fig. 10 to 11, the cantilever plate 14 includes an upper suspension plate 14a and a lower suspension plate 14b arranged in parallel with each other, and a reinforcing plate 14c for structural reinforcement arranged between the upper suspension plate 14a and the lower suspension plate 14 b. The upper suspension plate 14a and the lower suspension plate 14b extend horizontally and are hinged to the top end face and the bottom end face of the moving block 13, guide sliding grooves 19 are formed in the upper plate face of the bottom plate 11 and the lower plate face of the top plate 18, the vertical convex column 14d at the upper suspension plate 14a extends vertically upwards as shown in fig. 12, so that a guide matching relation is formed between the vertical convex column 14d and the guide sliding grooves 19 at the top plate 18, and the vertical convex column 14d at the lower suspension plate 14b extends vertically downwards so that a guide matching relation is formed between the vertical convex column 14d and the guide sliding grooves 19 at the bottom plate 11. Thus, when the driving motor acts to drive the bidirectional screw rod 17 to rotate, and further the moving block 13 generates a reciprocating displacement motion along the threaded section of the bidirectional screw rod 17, the moving block 13 drives the cantilever plate 14 to generate a transverse swinging motion. Because the cantilever plate 14 and the crawler wheel form an integral structure due to the hinged shafts, at this time, under the linear action of the moving block 13, the cantilever plate 14 follows up, and the crawler wheel can be driven to perform the inward contraction and outward expansion actions at this time. Of course, in order to ensure the action accuracy and synchronism of the cantilever plates 14 located at both sides of the base plate 11, as shown in fig. 11-12, a synchronizing gear 60a may be disposed on the upper suspension plate 14a at the same end of the base plate 11, so that the function of synchronizing the action of the cantilever plates 14 at the same end of the base plate 11 is realized by virtue of the meshing property of the synchronizing gear 60 a.

As shown in fig. 6-7, the jacking assembly 16 includes a four-bar mechanism formed by joining the bottom plate 11, the first swing link 16b, the jacking block 16a and the second swing link 16c end to end, and the second swing link 16c is in power fit with an output shaft of the swing arm motor 16d to form a driving rod, so as to achieve the action effect of the whole four-bar mechanism. Once the four-bar mechanism is actuated, the top block 16a can be actuated to move toward and away from the bottom plate 11, and the walking assembly 15 can be actuated to move up and down. To improve the supporting stability of the top block 16a, the top block 16a may be directly made of a flat plate, or may be made of two sets of top blocks 16a in cooperation with a transverse pull rod 16e as described in the present invention. The two sets of top blocks 16a shown in fig. 7 and the transversal pull rod 16e can form a square frame-like structure, obviously having lower requirements on the flatness of the contact surface, and being especially suitable for being used in rugged cable trench environment.

As can be seen from fig. 1 to 4, the sensing surfaces of the sensing portion 30 point to the wall surfaces on both sides of the cable tunnel, so that the distance from the base to the wall surfaces on both sides is always the same when the base travels along the cable tunnel by means of the sensing surfaces of the sensing portion 30, and the purpose of ensuring automatic centering and guiding when the base travels along the cable tunnel is finally achieved, which is not repeated herein.

Second, camera lifting system

The camera lifting system, i.e., the specific structure of the present invention, is shown in fig. 1-5 and fig. 13-17, and includes a linear displacement assembly, a pseudo-four-bar linkage assembly 22, and a camera assembly 24, which are sequentially arranged from bottom to top. The design of the camera lift system aims at achieving minimal folding in length and even overall volume while ensuring operation. Wherein:

the shape of the linear displacement assembly is shown in fig. 13, and includes a displacement screw 25 disposed at the upper plate surface of the top plate 18 and extending along the length direction of the upper plate surface of the top plate 18, and a displacement motor 26 is disposed at the tail end of the displacement screw 25 for performing a driving function. The displacement screw rod 25 is in threaded fit with the stroke block 21, so that the displacement screw rod 25 is driven to rotate through the driving motor, and the aim of directional reciprocating movement of the stroke block 21 is further fulfilled. As can be seen in fig. 13-14, an extension bracket 40 is also disposed behind the displacement motor 26, in order to cooperate with the top plate 18 at the base to support the pseudo-four-bar linkage assembly 22.

In fig. 13-17, the pseudo-four-bar linkage assembly 22 includes a first rocker 22a, a second rocker 22e, a first link 22b, and a second link 22 d. Imitating the four-bar linkage assembly 22, as the name implies, it is similar to a planar four-bar linkage in structure, but as shown in fig. 13, some of the bar hinges are slidable with respect to the other bar shafts, so as to realize the retractable and extendable functions of the whole camera lifting system. More specifically: the bottom end of the first rocker 22a is horizontally hinged with the stroke block 21, and the top end is sleeved at the rod body of the first connecting rod 22b through a first sliding sleeve 22 c; the bottom end of the first connecting rod 22b is horizontally hinged on the extending frame 40, and the top end is horizontally hinged at the bottom end of the supporting rod 23; the bottom end of the second connecting rod 22d is horizontally hinged at the rod body of the first rocker 22a, and the top end is horizontally hinged at the bottom end of the second rocker 22 e; the top end of the second rocker 22e is sleeved at the shaft of the support rod 23 through a second sliding sleeve 22 f; the axes of the hinges are parallel to each other. Thus, when the stroke block 21 performs a retreating motion along the displacement screw 25, i.e., a rightward motion as shown in fig. 13, the first rocker 22a performs a jacking motion, so as to push the first link 22b to lift; meanwhile, the second connecting rod 22d and the second rocking rod 22e generate a linked pseudo-four-bar linkage action, and finally the supporting rod 23 is pushed to perform a vertical action at the moment. At this time, as shown in fig. 13, 15 and 17, the rod bodies form a parallel double-crank structure with the same length as the rod pair at the matching position. When the stroke block 21 moves forward along the displacement screw 25, correspondingly, the first rocker 22a generates a falling motion, so as to drive the first connecting rod 22b, the second connecting rod 22d and the second rocker 22e to generate a follow-up motion, and finally the supporting rod 23 bends over downwards. When the supporting rod 23 is located at the lowest position, the supporting rod is stably placed on the placing groove 51 of the supporting block 50 at the first link 22b just because the height of the bottom hinge point of the first link 22b is higher than that of the bottom hinge point of the first rocking bar 22a, so as to ensure the placing stability.

For the camera assembly 24, after the camera assembly 24 is lifted to a predetermined height, the camera 24c can generate a pitching motion by driving the second torque motor 24d, so as to ensure that the camera 24c can always perform real-time cable observation in a horizontal state. Meanwhile, the camera 24c can also drive the rotating block 24b to act through the first torque motor so as to generate a rotating action, so that the fixed-point multi-angle observation purpose is realized, and the observation accuracy and reliability can be obviously improved.

To facilitate a further understanding of the present invention, the workflow of an embodiment of the present invention is further described herein with reference to FIGS. 1-6:

the cable trench inspection robot provided by the invention has two forms of a normal advancing posture and an unfolding posture when needed so as to adapt to different working conditions, wherein:

1) and a traveling posture

When the cable trench inspection robot is in a moving posture, as shown in fig. 1-2, the displacement motor 26 at the camera lifting system rotates at the moment to drive the stroke block 21 to move forward along the displacement screw rod 25, and the first rocker 22a generates a lodging action at the moment, so that the first connecting rod 22b, the second connecting rod 22d and the second rocker 22e are driven to generate a follow-up action, and finally the supporting rod 23 is made to lie prone downwards. When the supporting rod 23 is located at the lowest position, it is just because the bottom hinge point of the first link 22b is higher than the bottom hinge point of the first rocker 22a, and is stably placed on the placing groove 51 of the supporting block 50 at the first link 22 b. Meanwhile, the jacking assembly 16 is in a furled state and clings to the lower plate surface of the bottom plate 11 at the base, the unfolding assembly moves due to the rotation of the driving motor, and the cantilever plate 14 drives the two sets of crawler wheels to move oppositely until the two sets of crawler wheels cling to the side part of the base as shown in fig. 1-2, so that furled action is completed. At the moment, the action posture of the cable trench inspection robot is shown in the figure 1-2, the width of the cable trench inspection robot is smaller than that of the cable trench, and the height of the cable trench inspection robot is smaller than that of an opening at a firewall; the cable trench inspection robot can be integrally placed in the cable trench and can directly penetrate through the firewall along the opening at the firewall.

2) And a developed posture

After the cable pit patrols and examines robot and passes firewall: first, the jacking assembly 16 is actuated so that the base, together with the components carried on the base, is raised until the lowest height of the crawler wheels is higher than the ground level of the cable tunnel. Then, the unfolding component starts to work, the driving motor starts to rotate to drive the bidirectional screw rod 17 to rotate, the moving block 13 generates linear displacement motion and drives the cantilever plate 14 to generate unfolding motion, and the cantilever plate 14 is unfolded to enable the crawler wheels on the two sides of the base to generate separation motion. When the crawler wheels gradually cross the cable trench and are finally positioned right above the ground of the cable tunnel when being unfolded, at the moment, the jacking assembly 16 is reset again, and the two groups of crawler wheels are stably placed on the ground of the cable tunnel at the two sides of the cable trench under the action of gravity. The component states of the present invention at this time are shown with reference to fig. 5-6.

Then, as shown in fig. 3-4, the displacement motor 26 of the camera lifting system rotates to drive the stroke block 21 to retreat along the displacement screw 25, and at this time, the first rocker 22a generates a jacking motion, so as to drive the first link 22b, the second link 22d and the second rocker 22e to generate a follow-up motion, and finally, the support rod 23 is gradually erected. The gradual erection of the support bar 23 causes the ray assembly at the top end of the support bar 23 to be raised to a specified cable viewing height. After the camera assembly 24 is lifted to a predetermined height, the camera 24c generates a pitching motion by driving the second torque motor 24d, so as to ensure that the camera 24c can always observe the cable in real time in a horizontal state. Meanwhile, the camera 24c can also drive the rotating block 24b to act through the first torque motor so as to generate a rotating action, so that the fixed-point multi-angle observation purpose is realized.

After the unfolding action is completed, the crawler wheels are started, and the system can move along the current tunnel unit in the state shown in fig. 3-4 and execute the cable observation process of the current tunnel unit. After the whole process is finished, the cable trench inspection robot resets to the advancing posture shown in the figure 1-2 again, and passes through the front firewall again, so that the online observation work of the next tunnel unit can be automatically, conveniently and quickly carried out in a labor-saving and convenient manner without additional operation.

Of course, the above is one specific embodiment of the present invention. In actual operation, equivalent replacement of each power source 12, such as replacing the rotation driving action of each motor by a driving cylinder or even a gear rack manner, replacing the track wheel by another movable wheel body, or even replacing the camera 24c by another sensing structure such as a thermal imager to perform online monitoring in another manner, and the like; such conventional variations are intended to be within the scope of the present invention as embodied in the equivalent or similar language.

Claims (4)

1. The utility model provides a cable pit patrols and examines camera operating system for robot which characterized in that: the camera lifting system comprises a base, wherein a stroke block (21) capable of performing reciprocating linear displacement along the length direction of a cable trench is arranged on the base; the camera upgrading system further comprises a simulated four-bar linkage assembly (22), wherein the bottom end of a first rocker (22a) of the simulated four-bar linkage assembly (22) extends downwards and is in hinged fit with the stroke block (21); the bottom end of the first connecting rod (22b) is fixedly connected to the end part of the top plate (18) behind the stroke block (21), and the top end of the first connecting rod (22b) extends forwards and is in hinged fit with the bottom end of the supporting rod (23); the top end of the first rocker (22a) is hinged with a first sliding sleeve (22c), and a sliding rail of the first sliding sleeve (22c) is matched with the first connecting rod (22 b); the tail end of a second connecting rod (22d) is hinged to the middle section of the rod body of the first rocker (22a), the top end of the second connecting rod (22d) is hinged to the bottom end of a second rocker (22e), the top end of the second rocker (22e) is hinged to a second sliding sleeve (22f), the sliding rail of the second sliding sleeve (22f) is matched with the supporting rod (23), and the axes of all hinged positions are horizontally arranged and are parallel to each other; the top end of the supporting rod (23) is fixedly connected with a camera shooting assembly (24).

2. The camera lifting system for the cable trench inspection robot according to claim 1, wherein: the linear displacement unit comprises a displacement motor (26) and a displacement screw rod (25) coaxially and fixedly connected to an output shaft of the displacement motor (26), and the stroke block (21) is in threaded fit with the displacement screw rod (25); the displacement motor (26) is positioned at the rear part of the top plate (18), an extension frame (40) extends outwards from the rear part of the top plate (18) along the length direction of the base, and a hinge seat is arranged on the extension frame (40) so as to be hinged with the bottom end of the first connecting rod (22 b); the height of the bottom end hinge point of the first connecting rod (22b) is higher than that of the bottom end hinge point of the first rocker (22 a).

3. The camera lifting system for the cable trench inspection robot according to claim 2, wherein: a supporting block (50) used for supporting the supporting rod (23) is arranged at the position, close to the bottom end, of the first connecting rod (22b), and a placing groove (51) facilitating the supporting rod (23) to be placed is concavely arranged on the supporting block (50).

4. The camera lifting system for the cable trench inspection robot according to claim 1, 2 or 3, wherein: the camera shooting assembly (24) comprises a camera shooting seat (24a) and a rotating block (24b) horizontally hinged to the camera shooting seat (24a), a first torsion motor is arranged on the rotating block (24b), and an output shaft of the first torsion motor vertically extends upwards and is fixedly connected with a camera (24c) so as to drive the camera (24c) to rotate; the rotating block (24b) is driven by a second torsion motor (24d) arranged on the camera seat (24a) to generate pitching motion.

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