Vehicle-mounted emergency mechanized bridge with front-mounted bridge body

Abstract

The present invention discloses a vehicle-mounted emergency mechanized bridge with a front-mounted bridge body, comprising a carrier vehicle, a driver's cab and an observation room provided at the front end of the carrier vehicle, the driver's cab and the observation room being spaced apart, an erection mechanism provided between the driver's cab and the observation room, a load-bearing frame provided at the rear of the driver's cab and the observation room, a bridge span assembly being carried on the load-bearing frame, and a lifting assembly being connected to the load-bearing frame below, the lifting assembly being able to lift the load-bearing frame and the bridge span assembly, and connecting the bridge span assembly to the erection mechanism, and the erection mechanism being able to erect the bridge span assembly to a target position. The structural design of the vehicle-mounted emergency mechanized bridge with a front-mounted bridge body of the present invention is ingenious, and an erection mechanism is provided between the driver's cab and the observation room, thereby realizing the function of the front-mounted emergency mechanized bridge, avoiding the problem of vehicle U-turns, improving the efficiency of the mechanized bridge erection and the adaptability to the environment, and safely, reliably and efficiently realizing the erection of the mechanized bridge over a river or a canyon.

Description

Technical Field

[0001] The present invention relates to the field of bridge erection, in particular to a vehicle-mounted emergency mechanized bridge with a front-mounted bridge body. Background Art

[0002] A mechanized bridge is a type of bridge that can be quickly erected as a temporary bridge in locations like river canyons where there are no fixed bridges. During disaster relief efforts, quickly opening roads to disaster-stricken areas and promptly delivering relief supplies are crucial. Of the many methods available for clearing damaged roads and bridges, emergency mechanized bridges are undoubtedly the most efficient and fastest.

[0003] Currently, mechanized bridges are basically transported by vehicles such as heavy trucks that can transport heavier goods. They are folded onto the vehicle body during transportation and unfolded from the vehicle body during use. They are then erected over a river or canyon, and the vehicle can then detach from the main body of the mechanized bridge. Most mechanized bridges are erected with the bridge body positioned at the rear, that is, the bridge body is extended from the rear of the carrier vehicle for erection. Therefore, when the vehicle reaches the erection site, it needs to turn around and reverse to the location where the bridge needs to be erected. In areas with complex environments such as disaster areas, reversing and turning around is difficult and time-consuming, which seriously affects the efficiency of bridge erection. In addition, when erecting a mechanized bridge with a rear-mounted bridge body, the center of gravity will change, causing an excessive load on the rear of the vehicle, thereby creating the risk of the front end of the vehicle lifting, seriously endangering the safety of the driver. Therefore, it is urgent to invent a vehicle-mounted emergency mechanized bridge with a front-mounted bridge body to solve the above-mentioned major technical difficulties and to safely, reliably, and efficiently realize the erection of mechanized bridges over rivers or canyons. Summary of the Invention

[0004] The present invention provides a vehicle-mounted emergency mechanized bridge with a front-mounted bridge body, which can safely, reliably, and efficiently realize the effect of erecting a mechanized bridge over a river or canyon. The specific technical solution is as follows:

[0005] A vehicle-mounted emergency mechanized bridge with a front-mounted bridge body includes a carrier vehicle, a driver's cab and an observation room are provided at the front end of the carrier vehicle, the driver's cab and the observation room are spaced apart, an erection mechanism is provided between the driver's cab and the observation room, a load-bearing frame is provided at the rear of the driver's cab and the observation room, a bridge span assembly is carried on the top of the load-bearing frame, and the bottom of the load-bearing frame is connected to a lifting assembly, the lifting assembly can lift the load-bearing frame and the bridge span assembly, and connect the bridge span assembly to the erection mechanism, and the erection mechanism can erect the bridge span assembly to the target position.

[0006] Furthermore, the bridge span assembly includes a first bridge span and a second bridge span, the first bridge span and the second bridge span are detachably connected, and the first bridge span and the second bridge span are connected to form a mechanized bridge body.

[0007] Furthermore, the first span includes a first span unit and a second span unit that are symmetrically arranged on the left and right. The first span unit and the second span unit are movably arranged on the unfolding frame. The first span unit and the second span unit can move laterally relative to the unfolding frame to realize the expansion and contraction of the first span.

[0008] Furthermore, the bridge span assembly also includes an expansion drive assembly, which can drive the expansion and folding of the first bridge span and the second bridge span; the expansion drive assembly includes an expansion drive frame, and support frames are movably provided on both sides of the expansion drive frame. Two expansion hydraulic cylinders are fixed on both sides of the expansion drive frame, and the output shafts of the expansion hydraulic cylinders are connected to the support frames. The expansion hydraulic cylinders can drive the support frames to move on the expansion drive frame. The two support frames are respectively connected to the first span unit and the second span unit of the first span or the third span unit and the fourth span unit of the second span to drive the expansion of the first span unit and the second span unit.

[0009] Furthermore, the erection mechanism includes a fixed frame and a movable frame, the fixed frame is connected to the carrier vehicle, and the movable frame can move relative to the fixed frame; a movable pin tooth is provided under the movable frame, and a movable gear is provided on the fixed frame, the movable gear is engaged with the movable pin tooth, and the movable gear is connected to the movable motor, and the movable motor can drive the movable gear to rotate to drive the movable frame to move relative to the fixed frame.

[0010] Furthermore, multiple bridge span rollers and multiple bridge span gears are provided on both sides of the mobile frame, and upper rails and lower rails are provided on the inner side walls of the first bridge span unit, the second bridge span unit, the third bridge span unit and the fourth bridge span unit. Tracks for the movement of bridge span rollers and bridge span gears are formed between the upper rails and the lower rails, and bridge span pin teeth that match the bridge span gears are provided in the upper rails; the bridge span gears can engage with the bridge span pin teeth, and the bridge span gears rotate to drive the first bridge span to move on the mobile frame.

[0011] Furthermore, the fixed frame is hinged to the transport vehicle, and the fixed frame can rotate in the vertical direction relative to the transport vehicle to drive the movable frame to rotate in the vertical direction.

[0012] Furthermore, the lifting assembly includes a front lifting assembly and a rear lifting assembly. The front lifting assembly is arranged at the front position of the carrier, and the rear lifting assembly is arranged at the rear position of the carrier. The front lifting assembly and the rear lifting assembly lift the carrier together.

[0013] Furthermore, the front lifting assembly includes a lifting bracket, one end of which is hinged to the carrier, and the other end of which is positioned below the front end of the carrier frame to support the carrier frame. The middle of the lifting bracket is connected to a first lifting cylinder, which can drive the lifting bracket to rotate relative to the carrier frame to lift the carrier frame. The rear lifting assembly includes an articulated bracket and a second lifting cylinder, one end of which is hinged to the carrier frame, and the other end of which is hinged to the rear of the carrier frame. The middle of the articulated bracket is hinged to the output shaft of the second lifting cylinder, which is hinged to the rear of the carrier frame.

[0014] Furthermore, a first support assembly is provided below the front end of the carrier vehicle, and a second support assembly is provided at the rear end of the carrier vehicle. The first support assembly and the second support assembly can support the carrier vehicle to improve the stability of the carrier vehicle when the mechanized bridge is erected.

[0015] The structural design of the vehicle-mounted emergency mechanized bridge with the bridge body erected in front of the present invention is ingenious. The traditional front of the vehicle is divided into a cab and an observation room, and an erection mechanism is set between the cab and the observation room, thereby realizing the function of pre-erecting the emergency mechanized bridge, avoiding the problem of vehicle U-turns, and improving the efficiency of mechanized bridge erection and environmental adaptability; the bridge span is driven to move by the cooperation of gears and pin teeth, the bridge span moves smoothly, the moving distance is accurate, and the position of the bridge span can be stopped and fixed at any time; the rotatable erection mechanism facilitates the unloading of the bridge span, greatly saves manpower, and realizes the safe, reliable and efficient erection of the mechanized bridge over the river or canyon.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0018] Figure 1 A perspective view of a vehicle-mounted emergency mechanized bridge with a front-mounted bridge body according to the present invention;

[0019] Figure 2 A top view of a bridge span assembly of a vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention;

[0020] Figure 3A top view of another embodiment of a bridge span assembly of a vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention;

[0021] Figure 4 An exploded view of the bridge span components of the vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention when connected;

[0022] Figure 5 A side view of the bridge span components of the vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention when connected:

[0023] Figure 6 A schematic diagram showing the connection between the deployment drive assembly and the bridge span assembly of the vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention;

[0024] Figure 7 A side view of the erection mechanism of the vehicle-mounted emergency mechanized bridge with the bridge body erected in front of the present invention;

[0025] Figure 8 A perspective view of the bottom portion of the mobile frame of the vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention;

[0026] Figure 9 A schematic diagram showing the connection between the first span of the vehicle-mounted emergency mechanized bridge with the bridge body erected in front and the erection mechanism of the present invention;

[0027] Figure 10 A schematic diagram showing the connection between the guide rails and the movable frame of the first span of the vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention;

[0028] Figure 11 Schematic diagram of the connection between the second span and the first span of the vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention Figure 1 ;

[0029] Figure 12 Schematic diagram of the connection between the second span and the first span of the vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention Figure 2 ;

[0030] Figure 13 Schematic diagram of the connection between the second span and the first span of the vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention Figure 3 ;

[0031] Figure 14 A schematic diagram of a bridge span assembly of a vehicle-mounted emergency mechanized bridge erected in front of the bridge body of the present invention extending to the other side of a river;

[0032] Figure 15 A schematic diagram of a bridge span assembly of a vehicle-mounted emergency mechanized bridge installed in front of the bridge body of the present invention tilting and contacting the opposite bank of a river;

[0033] Figure 16A schematic diagram of placing the span assembly of the vehicle-mounted emergency mechanized bridge erected in front of the bridge body of the present invention on the ground;

[0034] Figure 17 This is a schematic diagram of a carrier vehicle reversing after the span assembly of the vehicle-mounted emergency mechanized bridge with the bridge body erected in front of the present invention is erected. DETAILED DESCRIPTION

[0035] In order to better understand the purpose, function and specific design scheme of the present invention, the following is a further detailed description of the vehicle-mounted emergency mechanized bridge with the bridge body installed in front of the present invention in conjunction with the accompanying drawings.

[0036] like Figure 1-17 As shown, the vehicle-mounted emergency mechanized bridge with a front-mounted bridge body of the present invention includes a carrier 1. A cab 11 and an observation room 12 are provided at the front end of the carrier 1. The cab 11 and the observation room 12 are spaced apart. An erection mechanism 2 is provided between the cab 11 and the observation room 12. A first support assembly 31 is provided below the front end of the carrier 1, and a second support assembly 32 is provided at the rear end of the carrier 1. The first support assembly 31 and the second support assembly 32 can support the carrier 1 to improve the stability of the carrier 1 during the erection of the mechanized bridge. A load-bearing frame 13 is provided at the rear of the cab 11 and the observation room 12. A bridge span assembly 4 is supported above the load-bearing frame 13. The load-bearing frame 13 is connected to a lifting assembly 5 below. The lifting assembly 5 can lift the load-bearing frame 13 and the bridge span assembly 4 and connect the bridge span assembly 4 to the erection mechanism 2. The erection mechanism 2 can erect the bridge span assembly 4 to the target location (a location where a mechanized bridge needs to be erected, such as a river or a canyon).

[0037] Specifically, if Figure 2-6 As shown, the bridge span assembly 4 includes a first span 41 and a second span 42. The first span 41 and the second span 42 are detachably connected. After being connected, the first span 41 and the second span 42 form a mechanized bridge body. The first span 41 includes a first span unit 411 and a second span unit 412, which are symmetrically arranged on the left and right sides. The first span unit 411 and the second span unit 412 are movably arranged on the deployment frame 43. The first span unit 411 and the second span unit 412 can move laterally relative to the deployment frame 43 to achieve the expansion and contraction of the first span 41. The deployment frame 43 includes a fixed beam 431, on which a plurality of deployment cross beams 432 are laterally arranged. The inner side walls of the first span unit 411 and the second span unit 412 are provided with a plurality of cross beam holes that match the shape of the deployment cross beams 432. The deployment cross beams 432 can be inserted into the cross beam holes to achieve the lateral movement of the first span unit 411 and the second span unit 412 relative to the deployment frame 43.

[0038] The lower surfaces of the first span unit 411 and the second span unit 412 are horizontally arranged to facilitate contact with the ground. The upper surfaces of the first span unit 411 and the second span unit 412 are inclined, and the height of the first span unit 411 and the second span unit 412 at one end away from the second span 42 is lower than the height of the first span unit 411 and the second span unit 412 at one end close to the second span 42, so as to facilitate vehicles traveling from the ground to the mechanized bridge, or from the mechanized bridge to the ground. Preferably, the upper surfaces of the first span unit 411 and the second span unit 412 are provided with a plurality of ridge-shaped protrusions to increase the friction between the upper surfaces of the first span unit 411 and the second span unit 412, thereby improving the safety of vehicle driving and preventing vehicles from slipping on the mechanized bridge.

[0039] The second span 42 includes a third span unit 421 and a fourth span unit 422, which are symmetrically arranged. The second span 42 has the same structure as the first span 41 and will not be described in detail here. It is worth noting that the first span 41 and the second span 42 are connected via a C-D joint 44. The C-D joint 44 includes an C joint 441 and a D joint 442. The C joint 441 and the D joint 442 are respectively fixed to the first span 41 and the second span 42. The D joint 442 includes a connecting protrusion, and the C joint 441 includes a connecting hole that mates with the connecting protrusion. The connecting protrusion of the D joint 442 can be inserted into the connecting hole of the C joint 441 to connect the C-D joint 44, thereby connecting the first span 41 and the second span 42.

[0040] Preferably, the C-D joint 44 of this embodiment is disposed below the first span 41 and the second span 42, and a grooved top block 451 and a raised top block 452 are disposed above the first span 41 and the second span 42, respectively. The cross-sectional area of ​​the connection hole of the C-joint 441 is larger than the area of ​​the connection protrusion of the D-joint 442. The connection protrusion of the D-joint 442 is movable within the connection hole of the C-joint 441, allowing the first span 41 to rotate a certain angle relative to the second span 42, thereby allowing the grooved top block 451 and the raised top block 452 above the first span 41 and the second span 42 to engage with each other. After the first span 41 and the second span 42 are connected, the grooved top block 451 and the raised top block 452 above are embedded in the horizontal direction, while the C-joint 441 and the D-joint 442 below are embedded in the vertical direction. The grooved top block 451 and the raised top block 452 bear vertical pressure, while the C-joint 441 and the D-joint 442 bear horizontal tension.

[0041] It is worth noting that in this embodiment, a hook assembly is further provided above the first span 41 and the second span 42. The hook assembly includes a hook 471 and a hanging rod 472. The hook 471 is fixed above the first span 41 or the second span 42, and the hanging rod 472 is provided above the second span 42 or the first span 41. After the first span 41 and the second span 42 are connected, the hook 471 can be hooked with the hanging rod 472 to enhance the reliability of the connection between the first span 41 and the second span 42. Preferably, the hanging rod 472 is movably provided above the second span 42 or the first span 41. The hanging rod 472 is connected to a connecting rod, which is connected to a handle. Turning the handle can drive the hanging rod 472 to move, thereby achieving connection or disconnection between the hook 471 and the hanging rod 472, thereby facilitating the connection and disassembly of the first span 41 and the second span 42.

[0042] The span assembly 4 also includes an expansion drive assembly 46, which can drive the expansion and folding of the first span 41 and the second span 42. The expansion drive assembly 46 includes an expansion drive frame 461, and support brackets 462 are movably provided on both sides of the expansion drive frame 461. Two expansion hydraulic cylinders 463 are fixed on both sides of the expansion drive frame 461. The output shafts of the expansion hydraulic cylinders 463 are connected to the support brackets 462. The expansion hydraulic cylinders 463 can drive the support brackets 462 to move on the expansion drive frame 461. The two support brackets 462 are respectively connected to the lower surfaces of the first span unit 411 and the second span unit 412 of the first span 41 or the third span unit 421 and the fourth span unit 422 of the second span 42 to drive the expansion of the first span unit 411 and the second span unit 412.

[0043] It is worth noting that in this embodiment, the first span 41 is stacked above the second span 42, and the second span 42 is placed on the support frame 462 of the deployment drive assembly 46. The deployment drive assembly 46 is fixedly connected to the carrier frame 13. The deployment drive assembly 46 can drive the third span unit 421 and the fourth span unit 422 of the second span 42 to deploy, and at the same time, driven by friction, the first span unit 411 and the second span unit 412 are deployed synchronously.

[0044] like Figure 7-11 As shown, the erection mechanism 2 includes a fixed frame 21 and a movable frame 22. The fixed frame 21 is connected to the carrier vehicle 1, and the movable frame 22 can move relative to the fixed frame 21. In this embodiment, a movable pin tooth 23 is provided below the movable frame 22, and a movable gear 24 is provided on the fixed frame 21. The movable gear 24 is engaged with the movable pin tooth 23, and the movable gear 24 is connected to the movable motor. The movable motor can drive the movable gear 24 to rotate to drive the movable frame 22 to move relative to the fixed frame 21.

[0045] Multiple bridge span rollers 25 and multiple bridge span gears 26 are arranged on both sides of the movable frame 22, and the inner side walls of the first bridge span unit 411 and the second bridge span unit 412 as well as the third bridge span unit 421 and the fourth bridge span unit 422 are provided with upper rails 481 and lower rails 482. A track for the movement of the bridge span rollers 25 and the bridge span gears 26 is formed between the upper rails 481 and the lower rails 482, and bridge span pin teeth that cooperate with the bridge span gears 26 are provided in the upper rails 481.

[0046] The lifting assembly 5 can lift the first span 41 and make the track of the first span 41 face the span rollers 25 and span gears 26 on both sides of the mobile frame 22. The mobile frame 22 moves toward the first span 41 so that the span rollers 25 are accommodated in the track and the span gears 26 are meshed with the span pin teeth. The span gear 26 rotates to drive the first span 41 to move on the mobile frame 22. The span gear 26 of this embodiment is connected to the gear shaft, and a drive gear is provided on the gear shaft. The drive gear is connected to the drive motor through a chain or a gear set. The drive motor can drive the span gear 26 to rotate. It can be understood that other existing gear drive forms can also be used, as long as they can drive the span gear 26 to rotate.

[0047] When the first bridge span 41 moves to the preset position, the lifting assembly 5 can lift the second bridge span 42 and connect the first bridge span 41 with the C-D joint 44 on the second bridge span 42, and then lift the second bridge span 42 through the lifting assembly 5, so that the groove top block 451 and the protruding top block 452 on the first bridge span 41 and the second bridge span 42 are engaged to realize the connection between the first bridge span 41 and the second bridge span 42, and make the track of the second bridge span 42 opposite to the bridge span rollers 25 and the bridge span gears 26 on both sides of the moving frame 22, and the bridge span gears 26 continue to drive the first bridge span 41 to move on the moving frame 22, so that the bridge span rollers 25 can be accommodated in the track of the second bridge span 42 and the bridge span gears 26 can be engaged with the bridge span pin teeth of the second bridge span 42, thereby realizing the movement of the second bridge span 42.

[0048] The fixed frame 21 is hingedly connected to the transport vehicle 1 and can rotate vertically relative to the transport vehicle 1 to drive the movable frame 22 to rotate vertically. In this embodiment, the fixed frame 21 is hingedly connected to the transport vehicle 1 at its middle position. The rear end of the fixed frame 21 is connected to the erection cylinder 27, which is fixedly mounted on the transport vehicle 1 and can drive the fixed frame 21 to rotate vertically relative to the transport vehicle 1.

[0049] When the front end of the first span 41 moves to the opposite side of the river or canyon, the erection cylinder 27 drives the fixed frame 21 to rotate in the vertical direction relative to the carrier vehicle 1 to rotate the first span 41 and the second span 42, so that the front end of the first span 41 touches the ground, and then the fixed frame 21 continues to rotate to disengage the span gear 26 from the second span 42, and then the first support assembly 31 and the second support assembly 32 are retracted, and the carrier vehicle 1 reverses to separate the movable frame 22 from the second span 42, and the erection of the span can be realized.

[0050] It is worth noting that Figure 2-3 As shown, the bridge span assembly 4 also includes two gap filling plates 491. After the bridge span is erected, the gap filling plates 491 are fixedly connected to the front inner sides of the first bridge span unit 411 and the second bridge span unit 412, and the rear inner sides of the third bridge span unit 421 and the fourth bridge span unit 422. The gap filling plates 491 can fill the gaps between the first bridge span unit 411 and the second bridge span unit 412, and between the third bridge span unit 421 and the fourth bridge span unit 422, to facilitate vehicles to travel from the ground to the mechanized bridge, or from the mechanized bridge to the ground. At the same time, the provision of the gap filling plates 491 can also enhance the stability between the first bridge span unit 411 and the second bridge span unit 412, and between the third bridge span unit 421 and the fourth bridge span unit 422, thereby improving the overall stability of the mechanized bridge. The fixing method of the gap filling plates 491 can be selected from existing fixing methods such as bolt fixing or pin fixing. As long as the gap filling plates 491 can be fixed, there is no limitation here.

[0051] Preferably, a gap-filling net 492 is connected between the first span unit 411 and the second span unit 412 and between the third span unit 421 and the fourth span unit 422. The gap-filling net 492 can fill the gaps between the first span unit 411 and the second span unit 412 and between the third span unit 421 and the fourth span unit 422, thereby preventing people or objects from accidentally falling into the gaps between the first span unit 411 and the second span unit 412 and between the third span unit 421 and the fourth span unit 422, so as to improve the safety of the mechanized bridge during use.

[0052] like Figure 9As shown, the lifting assembly 5 of this embodiment includes a front lifting assembly 51 and a rear lifting assembly 52. ​​The front lifting assembly 51 is arranged in front of the carrier 13, and the rear lifting assembly 52 is arranged behind the carrier 13. The front lifting assembly 51 and the rear lifting assembly 52 jointly lift the carrier 13. The front lifting assembly 51 includes a lifting bracket 511. One end of the lifting bracket 511 is hinged to the carrier 1, and the other end of the lifting bracket 511 is arranged below the front end of the carrier 13 to support the carrier 13. The middle position of the lifting bracket 511 is connected to the first lifting cylinder 512. The first lifting cylinder 512 can drive the lifting bracket 511 to rotate relative to the carrier 1, thereby lifting the carrier 13. The rear lift assembly 52 includes an articulated bracket 521 and a second lift cylinder 522. One end of the articulated bracket 521 is hinged to the carrier 1, and the other end is hinged to the rear of the carrier 13. The middle of the articulated bracket 521 is hinged to the output shaft of the second lift cylinder 522, which is hinged to the rear of the carrier 1. The second lift cylinder 522 drives the articulated bracket 521 to rotate, thereby lifting the carrier 13. In this embodiment, the rear lift assembly 52 consists of two sets, one located on either side of the rear of the carrier 13.

[0053] As shown in Figure 7, the first support assembly 31 includes a first support cylinder 311, a first support rod 312, and a support shovel 313. One end of the first support cylinder 311 is hinged between the cab 11 and the observation cabin 12, and the other end of the first support cylinder 311 is hinged to the upper portion of the support shovel 313. One end of the first support rod 312 is hinged below the front end of the carrier 1, and the other end of the first support rod 312 is hinged to the lower end of the support shovel 313. The extension and retraction of the first support cylinder 311 allows the support shovel 313 to be placed in either a stowed or supported position. The support shovel 313 includes a connecting surface, a supporting surface, and a pushing surface 314. The connecting surface connects the first support cylinder 311 and the first support rod 312. The supporting surface contacts the ground in the supported position. The pushing surface 314 level the ground to ensure stability after the span is erected. Preferably, the pushing surface 314 in this embodiment is concave in an arc shape to enhance pushing capacity.

[0054] like Figure 11As shown, the second support assembly 32 includes a second support cylinder 321, a second support rod 322, and a support plate 323. The second support cylinder 321 is fixedly mounted at the rear of the vehicle 1. The second support cylinder 321 is connected to the second support rod 322, which is in turn connected to the support plate 323. The support plate 323 can contact the ground to provide support. In this embodiment, multiple second support assemblies 32 are provided, evenly distributed on both sides of the rear of the vehicle 1. Preferably, a rubber pad is provided on the side of the support plate 323 that contacts the ground to increase friction with the ground, thereby providing a more stable support for the second support assembly 32.

[0055] The structural design of the vehicle-mounted emergency mechanized bridge with the bridge body erected in front of the present invention is ingenious. The traditional front of the vehicle is divided into a cab and an observation room, and an erection mechanism is set between the cab and the observation room, thereby realizing the function of pre-erecting the emergency mechanized bridge, avoiding the problem of vehicle U-turns, and improving the efficiency of mechanized bridge erection and environmental adaptability; the bridge span is driven to move by the cooperation of gears and pin teeth, the bridge span moves smoothly, the moving distance is accurate, and the position of the bridge span can be stopped and fixed at any time; the rotatable erection mechanism facilitates the unloading of the bridge span, greatly saves manpower, and realizes the safe, reliable and efficient erection of the mechanized bridge over the river or canyon.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A vehicle-mounted emergency mechanized bridge with a front-mounted bridge body, characterized in that: The transport vehicle comprises a transport vehicle, a driving cab and an observation room are provided at the front end of the transport vehicle, the driving cab and the observation room are arranged side by side, a mounting mechanism is provided between the driving cab and the observation room, the mounting mechanism comprises a fixed frame and a movable frame, the fixed frame is connected to the transport vehicle, and the movable frame can move relative to the fixed frame; a movable pin tooth is provided below the movable frame, a movable gear is provided on the fixed frame, the movable gear is meshed with the movable pin tooth, the movable gear is connected to a movable motor, and the movable motor can drive the movable gear to rotate to drive the movable frame to move relative to the fixed frame; a load-bearing frame is provided at the rear of the driving cab and the observation room, a bridge span assembly is carried above the load-bearing frame, the bridge span assembly comprises a first bridge span and a second bridge span, the first bridge span and the second bridge span are detachably connected, and the first bridge span and the second bridge span are connected to form a mechanized bridge body; The first bridge span includes a first bridge span unit and a second bridge span unit that are symmetrically arranged on the left and right. The first bridge span unit and the second bridge span unit are movably arranged on the unfolding frame. The first bridge span unit and the second bridge span unit can move laterally relative to the unfolding frame to realize the expansion and folding of the first bridge span. The second bridge span includes a third bridge span unit and a fourth bridge span unit that are symmetrically arranged on the left and right. The structure of the second bridge span is the same as that of the first bridge span. The lower part of the supporting frame is connected to the lifting assembly, which can lift the supporting frame and the bridge span assembly and connect the bridge span assembly to the erection mechanism. Multiple bridge span rollers and multiple bridge span gears are arranged on both sides of the mobile frame. The first bridge span unit and the second bridge span unit are The inner walls of the third span unit and the fourth span unit are provided with upper rails and lower rails, and a track for the movement of span rollers and span gears is formed between the upper rails and the lower rails, and span pin teeth that match the span gears are provided in the upper rails; the span gears can be engaged with the span pin teeth, and the span gears rotate to drive the first span to move on the moving frame; the lifting assembly can lift the second span and connect the first span with the second span, and the first span continues to move, so that the span rollers can be accommodated in the track of the second span and the span gears can be engaged with the span pin teeth of the second span, thereby realizing the movement of the second span; the erection mechanism can erect the span assembly to the target position.

2. The vehicle-mounted emergency mechanized bridge with a front-mounted bridge body as claimed in claim 1, characterized in that: The bridge span assembly also includes an expansion drive assembly, which can drive the expansion and folding of the first bridge span and the second bridge span; the expansion drive assembly includes an expansion drive frame, and support frames are movably provided on both sides of the expansion drive frame. Two expansion hydraulic cylinders are fixed on both sides of the expansion drive frame, and the output shafts of the expansion hydraulic cylinders are connected to the support frames. The expansion hydraulic cylinders can drive the support frames to move on the expansion drive frame. The two support frames are respectively connected to the first span unit and the second span unit of the first span or the third span unit and the fourth span unit of the second span to drive the expansion of the first span unit and the second span unit.

3. The vehicle-mounted emergency mechanized bridge with a front-mounted bridge body as claimed in claim 1, characterized in that: The fixed frame is hinged to the carrier vehicle, and the fixed frame can rotate in the vertical direction relative to the carrier vehicle to drive the movable frame to rotate in the vertical direction.

4. The vehicle-mounted emergency mechanized bridge with a front-mounted bridge body as claimed in claim 1, characterized in that: The lifting assembly includes a front lifting assembly and a rear lifting assembly. The front lifting assembly is arranged at the front position of the carrier frame, and the rear lifting assembly is arranged at the rear position of the carrier frame. The front lifting assembly and the rear lifting assembly lift the carrier frame together.

5. The vehicle-mounted emergency mechanized bridge with a front-mounted bridge body as claimed in claim 4, characterized in that: The front lifting assembly includes a lifting bracket, one end of the lifting bracket is hinged to the carrier vehicle, the other end of the lifting bracket is arranged below the front end position of the load-bearing frame to support the load-bearing frame, and the middle position of the lifting bracket is connected to the first lifting cylinder, and the first lifting cylinder can drive the lifting bracket to rotate relative to the carrier vehicle, thereby lifting the load-bearing frame; the rear lifting assembly includes an articulated bracket and a second lifting cylinder, one end of the articulated bracket is articulated to the carrier vehicle, the other end of the articulated bracket is articulated to the rear position of the load-bearing frame, the middle position of the articulated bracket is articulated to the output shaft of the second lifting cylinder, and the second lifting cylinder is articulated at the rear position of the carrier vehicle.

6. The vehicle-mounted emergency mechanized bridge with a front-mounted bridge body as claimed in claim 1, characterized in that: A first support assembly is provided below the front end of the carrier vehicle, and a second support assembly is provided at the rear end of the carrier vehicle. The first support assembly and the second support assembly can support the carrier vehicle to improve the stability of the carrier vehicle when the mechanized bridge is erected.

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