A three telescopic bridge inspection vehicle with a luffing boom linkage cat ladder and a movable gallery bridge

Abstract

The utility model discloses a three telescopic bridge detection vehicle with pitch arm linkage cat ladder and movable gallery bridge, including car body, revolving stage, pitch arm, first adapter, lifting cage, second adapter, first grade gallery bridge, second grade gallery bridge, third grade gallery bridge, one first transfer wheel is at least provided to the one end of second grade gallery bridge away from second adapter, one second transfer wheel is at least provided to the one end of second grade gallery bridge close to second adapter, two pull ropes are at least provided to the one end of first grade gallery bridge away from second adapter and the one end of third grade gallery bridge close to second adapter, and the middle part of at least one pull rope is arranged on the periphery of first transfer wheel, and the middle part of at least one pull rope is arranged on the periphery of second transfer wheel. When telescopic arm is unfolded, gallery bridge is placed to the lower part of bridge, and after telescopic arm is retracted, each grade cat ladder / step is folded to car body. Three gallery bridges only set up one drive mechanism, and the motion mechanism and control difficulty are simplified.

Description

Technical Field

[0001] This utility model belongs to the field of special vehicle technology, and in particular relates to a three-telescopic bridge inspection vehicle with a pitching arm linkage ladder and a movable corridor bridge. Background Technology

[0002] Traffic bridges are a crucial component of transportation infrastructure, used to cross natural or man-made obstacles such as rivers, valleys, or roads. They not only facilitate inter-regional connections but also play a vital role in promoting economic development. To ensure the safety and durability of traffic bridges, regular maintenance and management are essential. According to the "Highway Maintenance Technical Specifications," regular inspections of bridge substructures are generally conducted every 1 to 3 years, with the specific frequency depending on factors such as bridge type, service life, and traffic load. Inspections of bridge substructures primarily assess the health status of key components such as piers, foundations, and bearings. Key inspection items include pier inspection, foundation inspection, bearing inspection, and expansion joint inspection. For areas of the bridge substructure that are difficult to access, close-range inspections are conducted using equipment such as the boom arm and personnel-carrying work platform of a bridge inspection vehicle.

[0003] Chinese patent document CN109468949B discloses a control method for a folding arm double-arm bridge inspection vehicle. The control method includes a double-folding arm deployment control method, a double-folding arm retraction control method, a two-horizontal-arm angle control method, and a telescopic arm control method. The double-folding arm deployment and retraction control method includes: driving a first slewing mechanism, a second slewing mechanism, and a first, second, third, fourth, fifth, and sixth hydraulic cylinder, as well as a telescopic arm hydraulic cylinder, to deploy and retract the double-folding arms. The two-horizontal-arm angle control method includes: controlling the angle of the two main arms by extending or retracting the first and second telescopic arms. The telescopic arm control method includes: controlling the swing amplitude of the telescopic arm by driving the fourth and fifth slewing mechanisms, controlling the movement of the telescopic arm by driving a ball joint mechanism, controlling the rotation of the inspection device by driving a rotary table, and controlling the working radius of the telescopic arm by driving a stroke hydraulic cylinder.

[0004] On the one hand, to expand the vehicle inspection range, and on the other hand, to minimize the space occupied when the telescopic boom is folded, it is usually designed with a multi-stage motion structure. In the patented solution mentioned above, because its telescopic boom consists of a multi-stage motion mechanism and multiple hydraulic cylinders, the structure of the telescopic boom is quite complex. In particular, the end motion mechanism of the telescopic boom is far from the vehicle body, and the hydraulic pipes used to control the corresponding hydraulic cylinders are not only numerous but also long. This not only increases the difficulty of controlling the telescopic boom, but also significantly increases the corresponding maintenance procedures, failure rate, and operating costs. Utility Model Content

[0005] To overcome the complex structure and motion mechanism of existing telescopic booms, especially the distance between the end mechanism of the telescopic boom and the vehicle body, resulting in numerous and long hydraulic pipes that increase the control difficulty and failure rate of the telescopic boom, this invention aims to provide a three-telescopic bridge inspection vehicle with a pitching arm linkage ladder and a movable corridor bridge. By installing central rotating wheels at both ends of the secondary corridor bridge, and two ropes wound around the two central rotating wheels between the primary and tertiary corridor bridges, the extension and retraction of the secondary corridor bridge synchronously drives the extension and retraction of the primary and tertiary corridor bridges, simplifying the motion mechanism and reducing control difficulty and failure rate.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a three-telescopic bridge inspection vehicle with a pitching arm linkage ladder and a movable corridor bridge, comprising a vehicle body; a turntable rotatably connected to the vehicle body; a pitching arm, one end of which is rotatably connected to the turntable; a first adapter, the first adapter being rotatably connected to the other end of the pitching arm; a lifting cage slidably connected to the first adapter; a second adapter, the second adapter being rotatably connected to the lower end of the lifting cage; a primary corridor bridge, the primary corridor bridge being rotatably connected to the second adapter; and a secondary corridor bridge, the secondary corridor bridge being... The bridge is slidably connected to the first-level covered bridge along its length; the third-level covered bridge is slidably connected to the second-level covered bridge along its length; wherein, the second-level covered bridge has at least one first transfer wheel at the end away from the second adapter; the second-level covered bridge has at least one second transfer wheel at the end near the second adapter; the first-level covered bridge and the third-level covered bridge have at least two pull ropes at the end away from the second adapter and the end near the second adapter, respectively, with at least one pull rope having its middle portion located on the outer periphery of the first transfer wheel and at least one pull rope having its middle portion located on the outer periphery of the second transfer wheel.

[0007] Furthermore, a chain is provided along the length of the secondary corridor bridge; a sprocket motor connected to the chain drive is provided at the end of the primary corridor bridge away from the second adapter.

[0008] Specifically, the output shaft of the sprocket motor is provided with a drive wheel that is connected to the chain drive; two tensioning wheels are rotatably connected on the secondary corridor bridge, respectively located on both sides of the drive wheel; the tensioning wheels and the drive wheel abut against both sides of the chain.

[0009] Only one sprocket motor is needed to drive the extension and retraction of the secondary corridor bridge, while the primary and tertiary corridor bridges extend and retract synchronously, simplifying the motion mechanism and reducing the difficulty of control.

[0010] Preferably, there are three pull ropes: a first pull rope located at the lower end of the secondary corridor bridge, and two second pull ropes located on the left and right sides of the secondary corridor bridge, respectively.

[0011] Specifically, the upper part of the primary corridor bridge is rotatably connected to the second adapter; a lower swing cylinder is provided between the lower part of the primary corridor bridge and the second adapter; a lower support plate is provided at one end of the lower part of the primary corridor bridge; a side baffle is provided on the side of the second adapter away from the primary corridor bridge, with one end rotatably connected to the second adapter; the other end of the side baffle is rotatably connected to the other end of the lower support plate.

[0012] The first-level, second-level, and third-level covered bridges are shorter in size after retraction, making them easier to store on the vehicle body and to enter small bridges and bridges with small pier spacing under the drive of the second adapter; moreover, the three can extend and retract simultaneously, which is more efficient and can stop at any length, providing a wide working area.

[0013] Furthermore, a rotating motor is provided at the lower end of the lifting cage; a ring gear connected to the rotating motor is provided at the upper end of the second adapter; a three-stage ladder is provided on the side of the second adapter away from the primary corridor bridge; and an archway is provided on the side of the second adapter close to the primary corridor bridge.

[0014] Specifically, a secondary ladder is provided inside the lifting cage at the upper end of the ring gear; the secondary ladder is located on one side of the tertiary ladder.

[0015] During longitudinal movement, personnel pass through the lifting cage, preventing them from falling and improving passage safety.

[0016] Furthermore, the upper end of the pitch arm is provided with a plurality of pedals evenly arranged along the length direction of the pitch arm; the lower middle part of the pedal is rotatably connected to the pitch arm; the pitch arm is provided with two linkage rods located on both sides of the pedals respectively; the linkage rods are rotatably connected to the middle part of each pedal; the end of the linkage rod near the turntable is an L-shaped structure, and the end of the L-shaped structure is rotatably connected to the turntable; the rotation axis of the L-shaped structure is parallel to and does not coincide with the rotation axis of the pitch arm.

[0017] Specifically, the pitch arm is provided with two second railings located on both sides of the pedal; the second railing includes at least two parallel first connecting rods and at least two parallel second connecting rods; the first connecting rods and the second connecting rods are rotatably connected at their intersections; the lower end of the second connecting rod is rotatably connected to the pitch arm; the lower part of the second connecting rod is rotatably connected to the linkage rod; a switching rod is provided between the second connecting rod away from the turntable and the first adapter, and the two ends of the switching rod are rotatably connected to the corresponding second connecting rod and the first adapter respectively; the rotation axis of the switching rod is parallel to and does not coincide with the rotation axes of the corresponding second connecting rods and the rotation axis of the first adapter.

[0018] During the deployment of the tilting arm and the first adapter, the second fence and the pedals automatically unfold, providing passage for personnel and improving the comfort and safety of passage; there is no additional drive structure, the structure is simple, the deployment speed is fast, and it helps to improve work efficiency.

[0019] Preferably, a turntable cylinder is provided between the turntable and the vehicle body; the two ends of the turntable cylinder are rotatably connected to the vehicle body and the turntable respectively, and the two rotation axes of the turntable cylinder are parallel to and do not coincide with the rotation axis of the turntable.

[0020] The turntable cylinder drives the rotation of the turntable from the side, eliminating the need for a drive mechanism at the bottom of the turntable. This effectively reduces the overall height of the vehicle, lessens height restrictions, and facilitates mobile operations.

[0021] Furthermore, a movable corridor bridge is slidably connected to the third-level corridor bridge; four roller frames are respectively provided at the lower end of the movable corridor bridge near the four corners; multiple array holes evenly distributed along the length direction are provided on the side wall of the third-level corridor bridge near the upper end; pins are horizontally slidably connected to the roller frames, and the pins can be selectively inserted into the corresponding array holes; wherein, the two roller frames farther away from the second-level corridor bridge are rotatably connected to the movable corridor bridge, and the two roller frames closer to the second-level corridor bridge are detachably connected to the movable corridor bridge.

[0022] The movable covered walkway can be flexibly adjusted along the three-level covered walkway to assist personnel in climbing operations and to conduct detailed inspections of the inner top of the bridge, which is convenient for operations on bridges with height differences, such as trapezoidal cross-section bridges or bridge culverts.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. This utility model, by setting up a multi-stage motion mechanism, allows the telescopic arm to be placed under the bridge when it is extended, and personnel can move up the ladders / steps at each stage to the bridge for inspection; when the telescopic arm is retracted, the ladders / steps at each stage can be folded onto the vehicle body, reducing the space occupied and facilitating flexible work during relocation.

[0025] 2. The telescopic arm of this utility model is equipped with three corridors at its end. The three corridors can extend and retract synchronously, which makes it convenient for personnel to move along the corridors to conduct inspections of the bridges without blind spots. At the same time, only one drive mechanism is set for the three corridors, which simplifies the motion mechanism and control difficulty, thereby reducing the failure rate and production cost.

[0026] 3. The pedal and the second railing of this utility model automatically unfold or retract with the movement of the first adapter and the tilting arm, and the pedal always remains in a horizontal state, which facilitates the movement of personnel along the pedal without adding an additional motion mechanism for control, simplifying the operation process and making it easy for manual operation.

[0027] 4. This utility model features a movable walkway that slides on a three-tiered covered bridge, allowing it to be flexibly moved to multiple positions and positioned. The movable walkway can be flipped upwards, allowing operators to climb and operate from above, thus improving their ability to observe the top of the bridge. Furthermore, the operation is simple and labor-saving, making it convenient for personnel to operate. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention in its working state;

[0029] Figure 2 This is a schematic diagram of the vehicle body structure of this utility model;

[0030] Figure 3 This is a schematic diagram of the turntable and pitch arm of this utility model;

[0031] Figure 4 , Figure 5 This is a schematic diagram of the telescopic folding arm of this utility model;

[0032] Figure 6 This is a structural schematic diagram of the pitch arm and the first adapter of this utility model.

[0033] Figure 7 This is a schematic diagram of the structure of the second adapter of this utility model;

[0034] Figure 8 This is a frontal structural diagram of the first-level, second-level, and third-level covered bridges of this utility model;

[0035] Figure 9 This is a structural diagram of the back of the first-level, second-level, and third-level covered bridges of this utility model;

[0036] Figure 10 This is a structural diagram of the movable walkway bridge of this utility model in its retracted state;

[0037] Figure 11 This is a schematic diagram of the structure of the movable walkway bridge of this utility model in its flip-open state;

[0038] Figure 12 This is a schematic diagram of the structure of the movable corridor bridge of this utility model.

[0039] In the diagram: 11. Vehicle body; 12. Support wheel; 21. Turntable; 22. Turntable cylinder; 23. Counterweight; 24. First-stage ladder; 25. First fence; 26. Fence cylinder; 31. Pitch arm; 32. Pitch cylinder; 33. Pedal; 34. Linkage rod; 35. Second fence; 36. Switching rod; 41. First adapter; 42. Lifting cage; 43. Outward swing cylinder; 44. Second-stage ladder; 45. Lifting cylinder; 46. Rotary motor; 51. Second adapter; 511. Ring gear; 52. Lower support plate 53. Side panel; 54. Three-stage ladder; 55. Archway; 61. First-stage corridor bridge; 62. Second-stage corridor bridge; 63. Third-stage corridor bridge; 631. Array hole; 64. Movable corridor bridge; 641. Pin; 642. Fixed ladder; 643. Tilting ladder; 644. Stop bar; 645. Elastic clip; 646. Roller; 65. Chain; 66. Sprocket motor; 67. Tensioner wheel; 68. Lower swing cylinder; 71. First pull rope; 72. Second pull rope; 73. First intermediate rotating wheel; 74. Second intermediate rotating wheel. Detailed Implementation

[0040] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0041] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, terms such as "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Example 1

[0045] See Figures 1-9 A three-telescopic bridge inspection vehicle with a pitching arm linkage ladder and a movable corridor bridge includes a vehicle body 11, two sets of longitudinally slidably connected support wheels 12 on the right side of the vehicle body 11, and a telescopic folding arm mounted on the vehicle body 11.

[0046] The telescopic folding arm includes a turntable 21 rotatably connected to the vehicle body 11, a pitch arm 31 rotatably connected to the turntable 21 at one end, a first adapter 41 rotatably connected to the other end of the pitch arm 31, and a lifting cage 42 slidably connected to the first adapter 41; the rotation axes of the turntable 21, the pitch arm 31, and the first adapter 41 are perpendicular to each other; the rotation axis of the turntable 21 is arranged longitudinally.

[0047] The lower end of the lifting cage 42 is rotatably connected to a second adapter 51; the rotation axis of the second adapter 51 is arranged along the length direction of the lifting cage 42; a primary corridor bridge 61 is rotatably connected to the second adapter 51; a secondary corridor bridge 62 is slidably connected within the primary corridor bridge 61 along the length direction; a tertiary corridor bridge 63 is slidably connected within the secondary corridor bridge 62 along the length direction; and a movable corridor bridge 64 is detachably connected to the end of the tertiary corridor bridge 63. The primary corridor bridge 61, the secondary corridor bridge 62, and the tertiary corridor bridge 63 are each an inverted U-shaped structure with an open top; the secondary corridor bridge 62 and the tertiary corridor bridge 63 are slidably connected within their respective inverted U-shaped structures.

[0048] At least one first rotating wheel 73 is provided at the end of the secondary corridor bridge 62 away from the second adapter 51; at least one second rotating wheel 74 is provided at the end of the secondary corridor bridge 62 near the second adapter 51; three pull ropes are provided at the end of the primary corridor bridge 61 away from the second adapter 51 and the end of the tertiary corridor bridge 63 near the second adapter 51, namely one first pull rope 71 located at the lower end of the secondary corridor bridge 62 and wrapped around the outer periphery of the first rotating wheel 73, and two second pull ropes 72 located on the left and right sides of the secondary corridor bridge 62 and wrapped around the outer periphery of the second rotating wheel 74.

[0049] A chain 65 is provided along the length of the secondary corridor bridge 62; a sprocket motor 66, which is connected to the chain 65, is provided at the end of the primary corridor bridge 61 away from the second adapter 51; a drive wheel, which is connected to the chain 65, is provided on the output shaft of the sprocket motor 66; two tensioning wheels 67, which are respectively located on both sides of the drive wheel, are rotatably connected to the secondary corridor bridge 62; the tensioning wheels 67 and the drive wheel abut against both sides of the chain 65.

[0050] The upper part of the primary corridor bridge 61 is rotatably connected to the second adapter 51; a lower swing cylinder 68 is provided between the lower part of the primary corridor bridge 61 and the second adapter 51; a lower support plate 52 is provided at one end of the lower part of the primary corridor bridge 61 and is rotatably connected to the lower part of the primary corridor bridge 61; a side baffle 53 is provided on the side of the second adapter 51 away from the primary corridor bridge 61 and is rotatably connected to the second adapter 51; the other end of the side baffle 53 is rotatably connected to the other end of the lower support plate 52.

[0051] A rotating motor 46 is provided at the lower end of the lifting cage 42; a ring gear 511 connected to the rotating motor 46 is provided at the upper end of the second adapter 51; a third-level ladder 54 is provided on the side of the second adapter 51 away from the first-level corridor bridge 61; the third-level ladder 54 is provided on the side baffle 53; an archway 55 is provided on the side of the second adapter 51 close to the first-level corridor bridge 61; a second-level ladder 44 is provided inside the lifting cage 42 at the upper end of the ring gear 511; the second-level ladder 44 is located on one side of the third-level ladder 54.

[0052] The first adapter 41 is provided with a lifting cylinder 45 for driving the lifting cage 42 to slide; the turntable 21 is provided with a pitch cylinder 32 for driving the pitch arm 31 to rotate; and the pitch arm 31 is provided with an external swing cylinder 43 for driving the first adapter 41 to rotate.

[0053] A turntable cylinder 22 is provided between the turntable 21 and the vehicle body 11; the two ends of the turntable cylinder 22 are rotatably connected to the vehicle body 11 and the turntable 21 respectively, and the two rotation axes of the turntable cylinder 22 are parallel to and do not coincide with the rotation axis of the turntable 21.

[0054] The upper end of the pitch arm 31 is provided with a plurality of pedals 33 evenly arranged along the length direction of the pitch arm 31; the lower middle part of the pedal 33 is rotatably connected to the pitch arm 31; the pitch arm 31 is provided with two linkage rods 34 respectively located on both sides of the pedal 33; the linkage rods 34 are rotatably connected to the middle part of each pedal 33; the upper end of the pedal 33 always remains parallel to the upper end of the vehicle body 11; the end of the linkage rod 34 near the turntable 21 is an L-shaped structure, and the end of the L-shaped structure is rotatably connected to the turntable 21; the rotation axis of the L-shaped structure is parallel to and does not coincide with the rotation axis of the pitch arm 31.

[0055] The pitch arm 31 is provided with two second railings 35 located on both sides of the pedal 33. The second railing 35 includes at least two parallel first connecting rods and at least two parallel second connecting rods. The first connecting rods and the second connecting rods are rotatably connected at their intersections. The lower end of the second connecting rod is rotatably connected to the pitch arm 31. The lower part of the second connecting rod is rotatably connected to the linkage rod 34. A switching rod 36 is provided between the second connecting rod away from the turntable 21 and the first adapter 41. The two ends of the switching rod 36 are rotatably connected to the corresponding second connecting rod and the first adapter 41, respectively. The rotation axis of the switching rod 36 is parallel to and does not coincide with the rotation axes of the corresponding second connecting rods and the rotation axis of the first adapter 41.

[0056] A counterweight 23 is provided at the end of the turntable 21 away from the pitch cylinder 32; a first-level ladder 24 is provided between the counterweight 23 and the turntable 21; a first fence 25 is provided on the side of the first-level ladder 24 away from the second fence 35; the first fence 25 is a parallelogram structure that can be folded; a fence cylinder 26 for driving the first fence 25 to fold is provided on the turntable 21.

[0057] Operating Procedure: After the vehicle body 11 moves to the designated position, the tilt arm 31 rotates upward and unfolds, the first adapter 41 rotates upward and unfolds, the first adapter 41 drives the switching rod 36 to rotate and open the second fence 35, the lifting cage 42 slides downward relative to the first adapter 41, pushing the second adapter 51 under the bridge. The sprocket motor 66 drives the chain 65 to push outward, the secondary corridor bridge 62 slides outward relative to the primary corridor bridge 61. During this process, the first central rotating wheel 73 pushes the first pull rope 71, causing the tertiary corridor bridge 63 to slide outward relative to the secondary corridor bridge 62, until the movable corridor bridge 64 moves to the designated end position. After the test is completed, the sprocket motor 66 drives the chain 65 to retract inward, the secondary corridor bridge 62 retracts inward relative to the primary corridor bridge 61. During this process, the second central rotating wheel 74 pushes the second pull rope 72, causing the tertiary corridor bridge 63 to slide inward relative to the secondary corridor bridge 62, until it is completely retracted.

[0058] Example 2

[0059] See Figure 10-12 The difference between Embodiment 2 and Embodiment 1 is that: the movable corridor bridge 64 is slidably connected to the tertiary corridor bridge 63; the lower end of the movable corridor bridge 64 is provided with four roller frames 646 respectively near the four corners; the lower end of the roller frame 646 is rotatably connected to two rollers that are slidably connected to the upper end of the tertiary corridor bridge 63; wherein, the two roller frames 646 far away from the secondary corridor bridge 62 are rotatably connected to the movable corridor bridge 64, and the two roller frames 646 near the secondary corridor bridge 62 are detachably connected to the movable corridor bridge 64; the two side walls of the tertiary corridor bridge 63 are provided with a plurality of array holes 631 evenly distributed along their length direction near the upper end; a pin 641 is horizontally slidably connected to the roller frame 646, and the pin 641 can be selectively inserted into the array hole 631.

[0060] A platform 647 is provided in the middle of the movable corridor bridge 64; a stop bar 644 is longitudinally slidably connected to the upper part of the movable corridor bridge 64; a fixed ladder 642 is provided at the lower part of the movable corridor bridge 64; a flip ladder 643 is provided at the lower end of the movable corridor bridge 64, one end of which is rotatably connected to the lower end of the fixed ladder 642; and an elastic clip 645 is provided in the middle of the fixed ladder 642 for engaging the flip ladder 643.

[0061] Based on Embodiment 1, to enhance the observation capability of the inner top of the bridge, the movable walkway 64 is unfolded for climbing operations. The movable walkway 64 is slid to the corresponding position, and the two pins 641 furthest from the secondary walkway 62 are inserted into the adjacent array holes 631. The movable walkway 64 is then flipped upwards to make it completely vertical. Simultaneously, two roller frames 646 near the secondary walkway 62 are installed at the lower end of the movable walkway 64, and the pins 641 on these two roller frames 646 are inserted into the corresponding array holes 631. The flip ladder 643 is rotated downwards, allowing the operator to climb the flip ladder 643, fix the ladder 642, and then push the stop bar 644 upwards to enter the platform 647. Subsequently, the stop bar 644 is released to allow it to slide freely back to its original position, preventing the operator from falling out of the movable walkway 64.

[0062] After the inspection is completed, rotate the flip ladder 643 so that it is locked onto the elastic clip 645, remove the two roller frames 646 near the secondary corridor bridge 62 from the movable corridor bridge 64, and rotate the movable corridor bridge 64 downward so that it is completely retracted into the tertiary corridor bridge 63.

[0063] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A three-telescopic bridge inspection vehicle with a pitching arm linkage ladder and a movable corridor bridge, characterized in that: Includes the vehicle body; A turntable, which is rotatably connected to the vehicle body; A pitch arm, one end of which is rotatably connected to the turntable; A first adapter is rotatably connected to the other end of the pitch arm; A lifting cage, which is slidably connected to the first adapter; The second adapter is rotatably connected to the lower end of the lifting cage; A primary corridor bridge, which is rotatably connected to the second adapter; A secondary corridor bridge, which is slidably connected to the primary corridor bridge along its length; A three-level covered bridge, which is slidably connected to the two-level covered bridge along its length; The secondary corridor bridge has at least one first transfer wheel at the end furthest from the second transfer member; the secondary corridor bridge has at least one second transfer wheel at the end closest to the second transfer member; the primary corridor bridge has at least two pull ropes at the end furthest from the second transfer member and the tertiary corridor bridge has at least two pull ropes at the end furthest from the second transfer member, with at least one pull rope having its middle portion located on the outer periphery of the first transfer wheel and at least one pull rope having its middle portion located on the outer periphery of the second transfer wheel.

2. The testing vehicle as described in claim 1, characterized in that: A chain is installed along the length of the secondary corridor bridge; a sprocket motor connected to the chain drive is installed at the end of the primary corridor bridge away from the second adapter.

3. The testing vehicle as described in claim 2, characterized in that: The output shaft of the sprocket motor is equipped with a drive wheel that is connected to the chain drive; two tension wheels are rotatably connected to the secondary corridor bridge, which are located on both sides of the drive wheel; the tension wheels and the drive wheel abut against both sides of the chain.

4. The testing vehicle as described in any one of claims 1-3, characterized in that: There are three pull ropes: one first pull rope located at the lower end of the secondary corridor bridge, and two second pull ropes located on the left and right sides of the secondary corridor bridge, respectively.

5. The testing vehicle as described in any one of claims 1-3, characterized in that: The upper part of the primary corridor bridge is rotatably connected to the second adapter; a lower swing cylinder is provided between the lower part of the primary corridor bridge and the second adapter; a lower support plate is provided at one end of the lower part of the primary corridor bridge; a side baffle is provided on the side of the second adapter away from the primary corridor bridge, with one end rotatably connected to the second adapter; the other end of the side baffle is rotatably connected to the other end of the lower support plate.

6. The testing vehicle as described in any one of claims 1-3, characterized in that: The lower end of the lifting cage is equipped with a rotating motor; the upper end of the second adapter is equipped with a ring gear that is connected to the rotating motor for transmission; a three-stage ladder is provided on the side of the second adapter away from the first-level corridor bridge; and an archway is provided on the side of the second adapter close to the first-level corridor bridge.

7. The testing vehicle as described in claim 6, characterized in that: The lifting cage is equipped with a secondary ladder located above the annular gear; the secondary ladder is located on one side of the tertiary ladder.

8. The testing vehicle as described in any one of claims 1-3, characterized in that: The upper end of the pitch arm is provided with a plurality of pedals evenly arranged along the length of the pitch arm; the lower middle part of the pedal is rotatably connected to the pitch arm; the pitch arm is provided with two linkage rods located on both sides of the pedals respectively; the linkage rods are rotatably connected to the middle part of each pedal; the end of the linkage rod near the turntable is an L-shaped structure, and the end of the L-shaped structure is rotatably connected to the turntable; the rotation axis of the L-shaped structure is parallel to and does not coincide with the rotation axis of the pitch arm.

9. The testing vehicle as described in claim 8, characterized in that: The pitch arm is provided with two second railings located on both sides of the pedal; the second railing includes at least two parallel first connecting rods and at least two parallel second connecting rods; the first connecting rods and the second connecting rods are rotatably connected at their intersections; the lower end of the second connecting rod is rotatably connected to the pitch arm; the lower part of the second connecting rod is rotatably connected to the linkage rod; a switching rod is provided between the second connecting rod away from the turntable and the first adapter, and the two ends of the switching rod are rotatably connected to the corresponding second connecting rod and the first adapter respectively; the rotation axis of the switching rod is parallel to and does not coincide with the rotation axes of the corresponding second connecting rods and the rotation axis of the first adapter.

10. The testing vehicle as described in any one of claims 1-3, characterized in that: A movable walkway is slidably connected to the third-level walkway; four roller frames are respectively provided at the lower end of the movable walkway near the four corners; multiple array holes evenly distributed along the length direction are provided on the side wall of the third-level walkway near the upper end; pins are horizontally slidably connected to the roller frames, and the pins can be selectively inserted into the corresponding array holes; wherein, the two roller frames farther away from the second-level walkway are rotatably connected to the movable walkway, and the two roller frames closer to the second-level walkway are detachably connected to the movable walkway.

Images