Vehicle-mounted large-span emergency mechanical drawbridge

Abstract

The application discloses a vehicle-mounted large-span emergency mechanical drawbridge, which comprises a carrying vehicle, a vehicle frame arranged on the carrying vehicle, a bearing frame arranged on the vehicle frame, and an end of the vehicle frame being hinged to the bearing frame, and the bearing frame being used for bearing a drawbridge body; the drawbridge body comprises a first bridge deck and a second bridge deck which are hinged to each other, the second bridge deck can be folded above the first bridge deck to form a storage state, the second bridge deck can be unfolded and arranged on the same horizontal plane with the first bridge deck to form a setting state, and the drawbridge body in the setting state can be arranged at a river, a gully or the like as a temporary bridge. The application has the advantages of ingenious structure design and high automation degree, the difficulty of loading and unloading and setting of the drawbridge body is reduced through cooperation of the inclined bearing frame and a winch assembly during bridge setting, the drawbridge body is folded to be stored or unfolded, the span of the drawbridge body is increased while the drawbridge body is conveniently transported, and the drawbridge body can be continuously set to expand the use environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle-mounted mechanical bridge, in particular to a vehicle-mounted large-span emergency mechanical drawbridge. BACKGROUND

[0002] Natural disasters and other emergencies occur frequently in China. In the process of rescue and relief, quickly opening up the road in the disaster area and timely transporting rescue materials are key links. Among the many means of opening up the damaged road and bridge, the mechanical bridge is the most commonly used bridge in emergency rescue. It can be quickly erected at the location of the river, gully and the like without a fixed bridge as a temporary bridge. Therefore, the mechanical bridge is the most efficient and fastest means.

[0003] The current mechanical bridge is basically transported by a truck or other vehicle capable of transporting heavy goods. During transportation, it is folded on the vehicle body, unfolded from the vehicle body during use, erected on the river or gully, and then the vehicle can be separated from the body of the mechanical bridge. However, the current mechanical bridge has low carrying capacity. In order to increase the carrying capacity, the thickness of the bridge body needs to be increased, resulting in an increase in transportation difficulty and transportation cost. In addition, the existing mechanical bridge has a fixed span range, and the use range is limited, which cannot meet all application scenarios in rescue and relief and wartime.

[0004] The drawbridge can provide multi-point elastic support through the stay cable, so that the bending moment and deflection of the bridge deck are significantly reduced, the crossing capacity is greatly improved, and the self-weight of the bridge deck can be effectively reduced under the same carrying capacity. Therefore, it is necessary to improve the mechanical bridge in the prior art and design a vehicle-mounted large-span emergency mechanical drawbridge. SUMMARY

[0005] The present application provides a vehicle-mounted large-span emergency mechanical drawbridge, which has the effects of improving the carrying capacity of the bridge, increasing the span of the single-span bridge body, and improving the overall width of the gully and river crossing. The specific technical scheme is as follows:

[0006] A vehicle-mounted large-span emergency mechanical drawbridge, wherein the vehicle-mounted large-span emergency mechanical drawbridge comprises a carrying vehicle, a vehicle frame is arranged on the carrying vehicle, a carrying frame is arranged on the vehicle frame, one end of the vehicle frame and the carrying frame is hinged, and the carrying frame is used for carrying a drawbridge body; the drawbridge body comprises a first bridge deck and a second bridge deck which are hinged, a tower is arranged on the side of the first bridge deck close to the hinged side of the second bridge deck, the tower is hinged to the first bridge deck, a plurality of stay cables are fixedly connected to the two sides of the tower, one end of the stay cables away from the tower is connected to the first bridge deck or the second bridge deck, the second bridge deck can be folded above the first bridge deck and the tower is rotated to a position parallel to the first bridge deck to form a storage state; the second bridge deck can be unfolded and in the same horizontal plane as the first bridge deck, and the tower is rotated to a position perpendicular to the first bridge deck to form an erection state, and the drawbridge body in the erection state can be erected at the location of the river, gully and the like as a temporary bridge.

[0007] Further, the end of the carrier frame close to the tail of the carrier is provided with a ramp assembly, the ramp assembly is hinged with the carrier frame, and the ramp assembly can be switched between a stop state and a ramp state relative to the carrier frame.

[0008] Further, the first bridge deck and the second bridge deck are connected through a bridge deck turnover assembly, and the bridge deck turnover assembly can drive the drawbridge body to be switched between a storage state and a erected state.

[0009] Further, the side surface of the first bridge deck and the second bridge deck is provided with a plurality of rotatable cable-stayed cable fixing discs, and the end of the cable-stayed cable away from the cable tower is connected with the cable-stayed cable fixing disc, and rotating the cable-stayed cable fixing disc can tension the cable-stayed cable.

[0010] Further, the cable-stayed cable fixing disc is connected with a fixing disc rotating shaft, the fixing disc rotating shaft is connected with a fixing disc driving assembly, the fixing disc driving assembly can drive the fixing disc rotating shaft to rotate to realize the tensioning of the cable-stayed cable, and the fixing disc rotating shaft is connected with a rotating locking assembly, and the rotating locking assembly can lock the fixing disc rotating shaft.

[0011] Further, the second bridge deck close to the bottom surface hinged with the first bridge deck is provided with a support leg, one end of the support leg is hinged with the second bridge deck, the support leg is connected with a support leg driving assembly, the support leg driving assembly can drive the support leg to be switched between a storage state and a support state, the upper side of the support leg is hinged with two first support plates on both sides in the length direction of the drawbridge body, the two first support plates are connected with a first support plate driving assembly, and the first support plate driving assembly can drive the first support plate to be switched between a storage state and a support state.

[0012] Further, the first bridge deck close to the side surface hinged with the second bridge deck is provided with a cable tower limiting protrusion, and the second bridge deck close to the side surface hinged with the first bridge deck is provided with a telescopic cable tower limiting block; one side of the support leg corresponding to the cable tower is provided with a cable tower limiting column, and the cable tower is provided with a cable tower limiting hole, the cable tower limiting column can be inserted into the cable tower limiting hole to limit the cable tower.

[0013] Further, the support leg comprises an upper support leg and a lower support leg, the upper support leg and the lower support leg are connected through a support leg telescopic assembly, and the support leg telescopic assembly can adjust the distance between the upper support leg and the lower support leg.

[0014] Further, the end of the second bridge deck away from the first bridge deck is provided with a lap joint part, the lap joint part can carry the first bridge deck of another drawbridge body to realize the series connection of a plurality of drawbridge bodies.

[0015] Further, the second bridge deck away from the bottom surface of the first bridge deck is hinged with an end support leg, the end support leg is connected with an end support leg driving assembly, and the end support leg driving assembly can drive the end support leg to be switched between a storage state and a support state.

[0016] The present application has a clever structure design and high automation degree. When the bridge is erected, the cooperation of the inclined bearing frame and the winch assembly makes the loading and unloading of the bridge body more stable. The friction between the bridge body and the bearing frame is reduced by the roller shaft arranged on the bearing frame, and the difficulty of loading and unloading the bridge body is reduced. The bridge body is folded for storage or unfolding, which facilitates transportation and increases the span of the bridge body. In addition, the tension of the cable-stayed cable is ensured by arranging the rotatable cable-stayed cable fixing disc, so as to ensure the bearing capacity of the bridge body. Finally, the overlap part and the end leg are arranged to connect multiple bridge bodies in series, thereby further increasing the span.

[0017] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar components. In the drawings:

[0019] Figure 1 is a perspective view of the vehicle-mounted large-span emergency mechanical drawbridge of the present application in a storage state;

[0020] Figure 2 is a perspective view of the vehicle-mounted large-span emergency mechanical drawbridge of the present application in a storage state;

[0021] Figure 3 is a side view of the ramp assembly of the vehicle-mounted large-span emergency mechanical drawbridge of the present application in a ramp state;

[0022] Figure 4 is an exploded view of the winch assembly of the vehicle-mounted large-span emergency mechanical drawbridge of the present application;

[0023] Figure 5 is a schematic view of the vehicle-mounted large-span emergency mechanical drawbridge of the present application when erecting Figure 1 ;

[0024] Figure 6 is a schematic view of the vehicle-mounted large-span emergency mechanical drawbridge of the present application when erecting Figure 2 ;

[0025] Figure 7 is a schematic view of the vehicle-mounted large-span emergency mechanical drawbridge of the present application when erecting

[0026] Figure 8 This is a perspective view of the deployed state of the vehicle-mounted large-span emergency mechanized suspension bridge of the present invention;

[0027] Figure 9 for Figure 8 Enlarged view of part A;

[0028] Figure 10 This is a schematic diagram of the cable tower limiting block extending as described in the present invention;

[0029] Figure 11 This is a schematic diagram of the connection of the bridge deck overturning assembly of the present invention;

[0030] Figure 12 This is a connection diagram of the rotary locking assembly of the present invention;

[0031] Figure 13 This is a schematic diagram of the unfolded first connecting plate of the upper support leg of the present invention;

[0032] Figure 14 This is a cross-sectional view of the upper support leg of the present invention. Figure 1 ;

[0033] Figure 15 This is a cross-sectional view of the upper support leg of the present invention. Figure 2 ;

[0034] Figure 16 This is an unfolded side view of the bridge deck body according to another embodiment of the present invention;

[0035] Figure 17 This is a schematic diagram of the present invention during the continuous erection of two-span suspension bridge bodies;

[0036] Figure 18 This is a schematic diagram of the present invention when the two-span suspension bridge body is continuously erected.

[0037] Figure 19 This is an unfolded perspective view of the suspension bridge body according to another preferred embodiment of the present invention;

[0038] Figure 20 This is a perspective view of the unfolded end support leg of another preferred embodiment of the present invention;

[0039] Figure 21 This is a perspective view of the end support leg being stored in another preferred embodiment of the present invention;

[0040] Figure 22 This is a partial view of the connection position between the fork foot of the end support leg and the lower end support leg in another preferred embodiment of the present invention;

[0041] Figure 23 This is a schematic diagram of the fork-leg limiting block extending as described in this invention;

[0042] Figure 24 Schematic diagram of continuous erection of the drawbridge body for another preferred embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to better understand the purpose, function and specific design scheme of the present application, the vehicle-mounted large-span emergency mechanized drawbridge of the present application is further described in detail below in combination with the drawings.

[0044] As shown in Figures 1-24 , the vehicle-mounted large-span emergency mechanized drawbridge of the present application comprises a carrying vehicle 1, the carrying vehicle 1 is provided with a vehicle frame 11, the vehicle frame 11 is provided with a bearing frame 12, the vehicle frame 11 is hingedly connected to one end of the bearing frame 12, and the bearing frame 12 is used for bearing the drawbridge body 2; the drawbridge body 2 comprises a first bridge deck 21 and a second bridge deck 22 which are hingedly connected, the first bridge deck 21 is hingedly connected to a cable tower 3 close to the side hingedly connected to the second bridge deck 22, the second bridge deck 22 can be folded above the first bridge deck 21 and the cable tower 3 is rotated to a position parallel to the first bridge deck 21 to form a storage state, the drawbridge body 2 in the storage state occupies a small space, facilitating transportation; the second bridge deck 22 can be unfolded and in the same horizontal plane as the first bridge deck 21 and the cable tower 3 is rotated to a position perpendicular to the first bridge deck 21 to form an erection state, the drawbridge body 2 in the erection state can be erected at a river, a gully or the like as a temporary bridge.

[0045] Specifically, as shown in Figures 1-5 , the carrying vehicle 1 is preferably a heavy truck, which facilitates high-speed driving on the ground to move to the target position, and the drawbridge body 2 is unloaded by the lifting bearing frame 12 and the drawbridge is built. The vehicle frame 11 of the present embodiment is provided with a lifting oil cylinder, the output shaft of the lifting oil cylinder is connected to the bearing frame 12, the lifting oil cylinder can lift the bearing frame 12 to make the bearing frame 12 inclined, so that the drawbridge body 2 slides off from the bearing frame 12 to the ground due to the action of gravity, to realize the erection of the drawbridge body 2.

[0046] The bearing frame 12 is provided with a plurality of rollers 121, which are used for bearing the drawbridge body 2, and the drawbridge body 2 can move on the plurality of rollers 121 to facilitate the loading and unloading of the drawbridge body 2. Preferably, in order to realize the detachable connection of the drawbridge body 2 and the bearing frame 12, the end of the bearing frame 12 close to the front of the carrying vehicle 1 is provided with a winch assembly 13, the output end of the winch assembly 13 is provided with a thimble 131, the drawbridge body 2 is provided with a protruding shaft, and the thimble 131 is detachably sleeved outside the protruding shaft.

[0047] As shown in Figure 3As shown, the winch assembly 13 includes a one-side open winch shell 132, the open side of the winch shell 132 is covered with a winch cover 133, the winch shell 132 and the winch cover 133 form a cavity, the cavity is fixed with a winding motor 134 fixedly connected with the winch cover 133, the winding motor 134 has two coaxial output shafts, the two coaxial output shafts are fixedly connected with a winding drum 135, the winding drum 135 is wound with a rope 136, one end of the rope 136 is fixed to the winding drum 135, the other end penetrates the winch cover 133 and is fixedly connected with the sleeve ring 131, the inner diameter of the sleeve ring 131 is consistent with the inner diameter of the convex shaft, the convex shaft is threadedly connected with a rotating cap, the rotating cap can limit the sleeve ring 131, preventing the sleeve ring 131 from falling off the convex shaft.

[0048] When it is needed to separate the suspension bridge body 2 from the carrying frame 12, the rotating cap is unscrewed, and the sleeve ring 131 is removed from the convex shaft, so that the suspension bridge body 2 and the carrying frame 12 are separated. When the used suspension bridge body 2 needs to be transported to the carrying frame 12, the sleeve ring 131 is sleeved on the convex shaft, and the rotating cap is screwed on the end of the convex shaft to prevent the sleeve ring 131 from being separated from the convex shaft, and then the winch assembly 13 is started, the winding motor 134 drives the winding drum 135 to rotate through the winding shaft, and the rope 136 is wound and collected on the winding drum 135, so that the suspension bridge body 2 is moved through the rope 136.

[0049] In order to reduce the difference between the carrying frame 12 and the ground, the carrying frame 12 is provided with a ramp assembly 14 near one end of the vehicle tail of the carrying vehicle 1, the ramp assembly 14 is hingedly connected with the carrying frame 12, the ramp assembly 14 can be switched between a stop state and a ramp state relative to the carrying frame 12, when the ramp assembly 14 is in the stop state, the ramp assembly 14 is perpendicular to the carrying frame 12, the ramp assembly 14 can abut against the suspension bridge body 2 to limit the position of the suspension bridge body 2, prevent the suspension bridge body 2 from falling off the carrying frame 12, and improve the stability of the suspension bridge body 2 on the carrying frame 12; when the ramp assembly 14 is in the ramp state, one end of the ramp assembly 14 is connected with the carrying frame 12, and the other end of the ramp assembly 14 abuts against the ground, and the suspension bridge body 2 on the carrying frame 12 can slide down to the ground through the ramp assembly 14.

[0050] The ramp assembly 14 includes a ramp frame body 141, the ramp frame body 141 is provided with a rotatable conveyor belt 142, the rotating conveyor belt 142 can assist in loading and unloading the suspension bridge body 2. Specifically, the two sides of the ramp frame body 141 are respectively provided with a rotating shaft, the rotating shaft is provided with a rotating drum, the rotating drum is externally sleeved with the conveyor belt 142, the rotating shaft is connected with a ramp motor 143, and the ramp motor 143 can drive the rotating shaft to rotate, thereby driving the conveyor belt 142 to rotate. The conveyor belt 142 of the embodiment is provided in two groups on the two sides of the inner side of the ramp frame body 141, and the ramp motor 143 is arranged between the two groups of conveyor belts 142, the ramp motor 143 is connected with a speed reducer, and the speed reducer is connected with the rotating shaft.

[0051] The two sides of the ramp frame body 141 are connected with the ramp turnover assembly, which can drive the ramp assembly 14 to switch between the stop state and the ramp state. The ramp turnover assembly comprises a ramp turnover oil cylinder 144, a ramp turnover driving plate 145 and a ramp turnover connecting plate 146. The output shaft of the ramp turnover oil cylinder 144 is hingedly connected with one end of the ramp turnover driving plate 145 and the ramp turnover connecting plate 146. The end of the ramp turnover driving plate 145 away from the output shaft of the ramp turnover oil cylinder 144 is hingedly connected with the vehicle frame 11. The end of the ramp turnover connecting plate 146 away from the output shaft of the ramp turnover oil cylinder 144 is hingedly connected with the ramp frame body 141. The extension and retraction of the output shaft of the ramp turnover oil cylinder 144 can drive the ramp assembly 14 to switch between the stop state and the ramp state. Preferably, the ramp turnover connecting plate 146 is arc-shaped to increase the turnover range of the ramp frame body 141.

[0052] As shown in Figure 1 , the ends of the first bridge deck 21 and the second bridge deck 22 are respectively provided with a convex shaft. The carrying frame 12 is provided with two groups of winch assemblies 13, the lower winch assembly 13 can be connected with the first bridge deck 21, and the upper winch assembly 13 can be connected with the second bridge deck 22.

[0053] As shown in Figure 10 , the first bridge deck 21 and the second bridge deck 22 are connected through the bridge deck turnover assembly 23, which can drive the drawbridge body 2 to switch between the storage state and the erected state. The bridge deck turnover assembly 23 comprises a bridge deck turnover oil cylinder 231, a bridge deck turnover driving plate 232 and a bridge deck turnover connecting plate 233. The output shaft of the bridge deck turnover oil cylinder 231 is hingedly connected with one end of the bridge deck turnover driving plate 232 and the bridge deck turnover connecting plate 233. The end of the bridge deck turnover driving plate 232 away from the output shaft of the bridge deck turnover oil cylinder 231 is hingedly connected with the first bridge deck 21. The end of the bridge deck turnover connecting plate 233 away from the output shaft of the bridge deck turnover oil cylinder 144 is hingedly connected with the second bridge deck 22. The extension and retraction of the output shaft of the bridge deck turnover oil cylinder 231 can drive the drawbridge body 2 to switch between the storage state and the erected state. Preferably, the bridge deck turnover connecting plate 233 is arc-shaped to increase the turnover range of the second bridge deck 22. It is worth noting that, in order to increase the stability and compactness of the drawbridge body 2 in the storage state, the first bridge deck 21 and the second bridge deck 22 are provided with a bridge deck turnover accommodating groove. When the drawbridge body 2 is in the storage state, the bridge deck turnover assembly 23 can be accommodated in the bridge deck turnover accommodating groove. Preferably, in order to improve the stability of the first bridge deck 21 and the second bridge deck 22 during turnover, the bridge deck turnover assembly 23 of the embodiment is two groups, and the two groups of bridge deck turnover assemblies 23 are arranged side by side near the middle position of the first bridge deck 21 and the second bridge deck 22.

[0054] As shown in Figure 6As shown, the first bridge surface 21 is provided with a cable tower 3 near the side hinged to the second bridge surface 22, the cable tower 3 is hinged to the first bridge surface 21, and a plurality of cable stays are fixedly connected to the cable tower 3, the ends of the cable stays away from the cable tower 3 are connected to the first bridge surface 21 or the second bridge surface 22, and the cable tower 3 and the cable stays can improve the load-carrying capacity of the first bridge surface 21 and the second bridge surface 22.

[0055] The side of the first bridge surface 21 and the second bridge surface 22 is provided with a plurality of rotatable cable stay fixing discs 31, the ends of the cable stays away from the cable tower 3 are connected to the cable stay fixing discs 31, and rotating the cable stay fixing disc 31 can tension the cable stay to make the cable stay work and improve the load-carrying capacity of the first bridge surface 21 and the second bridge surface 22.

[0056] Specifically, as shown in the drawings, Figure 11 The cable stay fixing disc 31 is connected to the fixing disc rotating shaft 32, the fixing disc rotating shaft 32 is connected to the fixing disc driving assembly 33, the fixing disc driving assembly 33 can drive the fixing disc rotating shaft 32 to rotate to tension the cable stay, and the fixing disc driving assembly 33 of the embodiment includes a fixing disc driving motor, the fixing disc driving motor drives the fixing disc rotating shaft 32 to rotate through a gear, so that the cable stay is wound on the cable stay fixing disc 31 to realize the tensioning of the cable stay. It can be understood that when the suspension bridge body 2 is in the storage state, the cable stay can also be wound on the cable stay fixing disc 31 to facilitate storage.

[0057] Preferably, the fixing disc rotating shaft 32 of the embodiment is connected to the rotating locking assembly 34, the rotating locking assembly 34 can lock the fixing disc rotating shaft 32 to make the fixing disc rotating shaft 32 unable to rotate, so as to achieve the purpose of locking the cable stay and prevent the cable stay from loosening after tensioning and affecting the load-carrying capacity of the suspension bridge body 2.

[0058] The rotating locking assembly 34 includes a rotating locking driving assembly 341, a locking disc 342, and a sliding disc 343, the locking disc 342 is fixedly arranged on the fixing disc rotating shaft 32, the sliding disc 343 is slidingly arranged on the fixing disc rotating shaft 32, the locking driving assembly can push the sliding disc 343 to abut against the locking disc 342 to lock, so as to fix the locking disc 342 and the fixing disc rotating shaft 32, thereby realizing the locking of the cable stay.

[0059] The rotating locking driving assembly 341 comprises a cable locking oil cylinder 3411, the output shaft of the cable locking oil cylinder 3411 is connected with a locking articulated block 3412, the locking articulated block 3412 is articulated with a locking connecting rod 3413, the locking connecting rod 3413 is articulated with a sliding disc 343, and the extension and contraction of the output shaft of the cable locking oil cylinder 3411 can drive the sliding disc 343 to slide on the fixed disc rotating shaft 32, so as to realize the locking and unlocking of the fixed disc rotating shaft 32. Preferably, the locking disc 342, the sliding disc 343 and the locking connecting rod 3413 of the embodiment are two groups, which are arranged on the two sides of the fixed disc rotating shaft 32 respectively, and the locking reliability of the fixed disc rotating shaft 32 can be improved by using two groups. It is worth noting that the end faces of the locking disc 342 and the sliding disc 343 abutting against each other are provided with anti-skid parts, so as to increase the friction between the locking disc 342 and the sliding disc 343. The anti-skid parts can be anti-skid protrusions or anti-skid textures.

[0060] As shown in Figures 8-10 , the first bridge surface 21 is provided with a cable tower limiting protrusion 35 near the side articulated with the second bridge surface 22, and the second bridge surface 22 is provided with a telescopic cable tower limiting block 36 near the side articulated with the first bridge surface 21. When the first bridge surface 21 and the second bridge surface 22 are unfolded, the cable tower 3 is rotated to the vertical position, at this time, one side of the lower part of the cable tower 3 abuts against the cable tower limiting protrusion 35, and the other side of the lower part of the cable tower 3 abuts against the extended cable tower limiting block 36, so as to limit the rotation angle of the cable tower 3 and prevent the cable tower 3 from tilting.

[0061] The second bridge surface 22 is provided with a limiting block containing groove near the side articulated with the first bridge surface 21, the cable tower limiting block 36 is arranged in the limiting block containing groove, the cable tower limiting block 36 is connected with a cable tower limiting oil cylinder, the cable tower limiting oil cylinder is fixed in the inner side of the second bridge surface 22, and the cable tower limiting oil cylinder can drive the cable tower limiting block 36 to extend and contract.

[0062] As shown in Figures 6-7 , the second bridge surface 22 is provided with a support leg 4 near the bottom surface articulated with the first bridge surface 21, one end of the support leg 4 is articulated with the second bridge surface 22, the support leg 4 is connected with a support leg driving assembly, and the support leg driving assembly can drive the support leg 4 to switch between the storage state and the supporting state. The support leg 4 in the storage state is attached to the bottom surface of the second bridge surface 22, and the upper end surface of the support leg 4 in the supporting state abuts against the position where the first bridge surface 21 and the second bridge surface 22 are connected, so as to provide support for the first bridge surface 21 and the second bridge surface 22.

[0063] The support leg driving assembly comprises a support leg driving oil cylinder 41, one end of the support leg driving oil cylinder 41 is articulated with the bottom surface of the second bridge surface 22, the other end is articulated with the side surface of the support leg 4, and the extension and contraction of the support leg driving oil cylinder 41 can drive the support leg 4 to switch between the storage state and the supporting state.

[0064] As shown in Figures 12-14 The upper sides of the support legs 4 are hinged with two first support plates 42 on both sides in the length direction of the bridge body 2, the two first support plates 42 are connected with a first support plate driving assembly, and the first support plate driving assembly can drive the first support plates 42 to switch between the storage state and the support state. The first support plates 42 in the storage state are attached to the side surface of the support legs 4, and the support legs 4 of the embodiment are provided with a first support plate containing groove 43, and the first support plates 42 can be contained in the first support plate containing groove 43. The two first support plates 42 in the support state respectively abut against the bottom surface of the first deck 21 and the second deck 22 to provide support for the first deck 21 and the second deck 22.

[0065] The first support plate driving assembly includes a first support plate driving oil cylinder 44, a first support plate driving connecting rod 45, and a first support plate driving connecting block 46. The first support plate driving oil cylinder 44 is fixedly arranged inside the support leg 4, the output shaft of the first support plate driving oil cylinder 44 is connected with the first support plate driving connecting block 46, the two sides of the first support plate driving connecting block 46 are respectively hinged with a first support plate driving connecting rod 45, and the two first support plate driving connecting rods 45 are respectively hinged with the first support plates 42. The extension and retraction of the first support plate driving oil cylinder 44 can drive the first support plates 42 to switch between the storage state and the support state.

[0066] Preferably, one side of the support leg 4 corresponding to the cable tower 3 is provided with a cable tower limiting column 37, and the cable tower 3 is provided with a cable tower limiting hole, the cable tower limiting column 37 can be inserted into the cable tower limiting hole to further limit the cable tower 3 and prevent the cable tower 3 from rotating. The end of the cable tower limiting column 37 away from the cable tower 3 is beveled, and a corresponding bevel is also arranged on the first support plate driving connecting block 46. When the first support plate driving oil cylinder 44 is extended, the cable tower limiting column 37 is pushed out of the surface of the support leg 4 and inserted into the cable tower limiting hole of the cable tower 3. The cable tower limiting hole is provided with an elastic reset assembly, and when the output shaft of the first support plate driving oil cylinder 44 is retracted, the elastic reset assembly can push the cable tower limiting column 37 back into the support leg 4 to release the limitation of the cable tower 3. The elastic reset assembly can be a spring, an elastic film, an elastic rope, etc.

[0067] The support leg 4 includes an upper support leg 47 and a lower support leg 48, which are connected by a support leg telescopic assembly 49. The support leg telescopic assembly 49 can adjust the distance between the support leg 4 and the lower support leg 48, thereby adjusting the length of the support leg 4. In this embodiment, the support leg telescopic assembly 49 includes a support leg telescopic cylinder and a support leg telescopic sleeve. The top of the support leg telescopic sleeve is fixedly connected to the upper support leg 47. The support leg telescopic sleeve is housed within the lower support leg 48 and can slide within the lower support leg 48. One end of the support leg telescopic cylinder is fixedly connected to the inner side of the lower support leg 48, and the other end is connected to the support leg telescopic sleeve. The overall length of the support leg 4 is adjusted by extending or retracting the support leg telescopic cylinder. It is worth noting that a pressure sensor is provided on the support leg telescopic cylinder. As the length of the support leg 4 increases, the pressure detected by the pressure sensor also increases. When a preset pressure is reached, the support leg 4 stops extending. At this time, the support leg can provide reliable support for the first bridge deck 21 and the second bridge deck 22.

[0068] Preferably, two second support plates 481 are hinged to both sides of the lower support leg 48 on both sides of the suspension bridge body 2 in the width direction. The two second support plates 481 are connected to a second support plate driving assembly, which can drive the second support plates 481 to switch between a retracted state and a supported state. In the retracted state, the second support plate 481 is attached to the side of the support leg 4. In this embodiment, the support leg 4 is provided with a second support plate receiving groove, into which the second support plate 481 can be accommodated. In the supported state, the two second support plates 481 respectively abut against the ground to increase the contact area between the support leg 4 and the ground, thereby improving the supporting capacity of the support leg 4. The structure of the second support plate driving assembly is the same as that of the first support plate driving assembly, and will not be described in detail here.

[0069] like Figures 15-17 As shown, in another embodiment, the end of the second bridge deck 22 away from the first bridge deck 21 is provided with an overlapping portion. The overlapping portion can support the first bridge deck 21 of another suspension bridge body 2, thereby realizing the series connection of multiple suspension bridge bodies 2 to achieve the construction of long-span ditches or rivers. After the first suspension bridge body 2 is erected, the transport vehicle 1 can drive onto the first suspension bridge body 2 to construct the second suspension bridge body 2. In addition, during the continuous construction of suspension bridge bodies 2, in order to improve the resistance of the lower support leg 48 to thrust, impact and overturning in the vehicle's travel direction, the second support plate 481 is hinged to both sides in the length direction of the suspension bridge body 2.

[0070] The overlap part comprises an overlap guide block 24 and an overlap bottom plate 25, the overlap guide block 24 is arranged above the overlap bottom plate 25, and a containing cavity matched with the end of the first bridge 21 is formed between the overlap guide block 24 and the overlap bottom plate 25, and the end of the first bridge 21 can be inserted into the containing cavity between the overlap guide block 24 and the overlap bottom plate 25 to realize the connection of the adjacent two bridge bodies 2.

[0071] It is worth noting that the second bridge 22 is hinged to the bottom surface of the first bridge 21 by an end leg 5, the end leg 5 is connected with an end leg driving assembly, and the end leg driving assembly can drive the end leg 5 to switch between the storage state and the supporting state. The end leg 5 in the storage state is attached to the bottom surface of the second bridge 22, and the end leg 5 in the supporting state is attached to the end bottom surface of the second bridge 22 and the bottom surface of the overlap part to provide support for the second bridge 22 and the overlap part. The structure of the end leg 5 is the same as that of the supporting leg 4, which will not be described here.

[0072] It is worth noting that the above-mentioned end leg 5 is suitable for continuous erection of two-span or three-span bridge bodies 2, and in another preferred embodiment, in order to improve the continuous erection of three-span or more bridge bodies 2, as shown in Figures 18-24 The end leg 5 of the present embodiment comprises an end upper leg 51 and an end lower leg 52, the end upper leg 51 is basically the same as the upper supporting leg 47 in structure, but does not include the cable tower limiting column 37, and the end upper leg 51 and the end lower leg 52 are telescopic, and the telescopic structure is the same as that of the upper supporting leg 47 and the lower supporting leg 48, which will not be described here.

[0073] The end lower leg 52 of the present embodiment is provided with a fork leg assembly 53 away from one end of the end upper leg 51, the fork leg assembly 53 comprises two fork legs 531, the two fork legs 531 are hinged to the end lower leg 52, and the two fork legs 531 can be forked to form a triangular support in the length direction of the bridge body 2, thereby improving the impact resistance of the end leg 5 in the length direction of the bridge body 2, and ensuring the stability of the three-span or more bridge body 2 during continuous erection.

[0074] The two fork legs 531 are connected with a fork leg driving assembly, and the fork leg driving assembly can drive the fork legs 531 to switch between the storage state and the supporting state. The end of the fork leg 531 in the storage state is attached to the end surface of the end lower leg 52, and the outer surface of the fork leg 531 is flush with the outer surface of the end lower leg 52 to facilitate the storage of the end leg 5; the two fork legs 531 in the supporting state are respectively rotated away from each other and form an included angle of 30-60 degrees, and the included angle of the present embodiment is preferably 30 degrees to form a triangular support in the length direction of the bridge body 2.

[0075] The fork drive assembly includes a fork drive cylinder 532, a fork drive connecting rod 533, and a fork drive connecting block 534. The fork drive cylinder 532 is fixedly installed inside the lower end support leg 52. The output shaft of the fork drive cylinder 532 is connected to the fork drive connecting block 534. The fork drive connecting block 534 is hinged to two fork drive connecting rods 533, and the two fork drive connecting rods 533 are respectively hinged to the fork 531. The extension and retraction of the fork drive cylinder 532 can drive the fork 531 to switch between a retracted state and a supported state. In this embodiment, a fork drive groove 535 is provided near the middle position of the upper part of the fork 531. A fork drive column is provided in the fork drive groove 535. The fork drive connecting rod 533 can be hinged to the fork drive column to realize the connection between the fork drive connecting rod 533 and the fork 531. By providing the fork drive slot 535, when the fork 531 is in the retracted state, the fork drive linkage 533 can be partially accommodated within the fork drive slot 535 to save space.

[0076] Preferred, such as Figures 21-24 As shown, a fork-leg limiting component 54 is provided at the hinge position between the fork leg 531 and the end lower support leg 52. The fork-leg limiting component 54 can limit the fork leg 531 in the supported state, preventing the fork leg 531 from rotating inward and improving the reliability of the fork leg 531 during operation. The fork-leg limiting component 54 includes a connected fork-leg limiting block 541 and a fork-leg limiting cylinder. A limiting cavity is provided on the end face at the hinge position between the end lower support leg 52 and the fork leg 531. The fork-leg limiting cylinder is fixedly installed in the limiting cavity. The end of the output shaft of the fork-leg limiting cylinder is connected to the fork-leg limiting block 541. The extension and retraction of the output shaft of the fork-leg limiting cylinder can drive the fork-leg limiting block 541 to extend or retract within the limiting cavity. When the fork leg 531 is in the supported state, the output shaft of the fork-leg limiting cylinder extends, so that the fork-leg limiting block 541 abuts against the end of the fork leg 531, thereby limiting the fork leg 531. When the fork foot 531 needs to be retracted, the output shaft of the fork foot limiting cylinder retracts, thereby driving the fork foot limiting block 541 to move into the limiting cavity, and the fork foot 531 can rotate to the retracted state.

[0077] It is worth noting that the fork foot 531 is movably arranged away from one end of the end lower support leg 52, a ground foot 536 is hingedly connected to the middle of the fork foot 531, a connecting ring is arranged at the inner side end of the ground foot 536, a wire rope connecting hole is arranged on the fork foot driving connecting rod 533, and the inner side end of the ground foot 536 is connected to the fork foot driving connecting rod 533 through a wire rope. When the fork foot 531 is unfolded, the wire rope connecting hole on the fork foot driving connecting rod 533 moves downward, and the ground foot 536 gradually becomes horizontal by relying on its own gravity, so that the ground foot 536 in the horizontal state can increase the force bearing area of the fork foot 531, thereby reducing the base stress and improving the adaptability of the erection environment. When the fork foot 531 is folded inward, the wire rope connecting hole on the fork foot driving connecting rod 533 moves upward, the wire rope pulls the ground foot 536 into a vertical state, and the ground foot 536 is accommodated between the two fork feet 531.

[0078] Preferably, in order to improve the stability of the end support leg 5, the fork foot 531 assembly 53 of the embodiment is two groups, which are arranged on both sides of the end lower support leg 52 in the width direction.

[0079] The structure of the present application is ingenious and has high automation. When the bridge is erected, the cooperation of the inclined bearing frame and the winch assembly makes the loading and unloading of the suspension bridge body more stable. The friction between the suspension bridge body and the bearing frame is reduced by arranging rollers on the bearing frame, and the difficulty of loading and unloading the suspension bridge body is reduced. The suspension bridge body is folded for storage or unfolding, which facilitates transportation and increases the span of the suspension bridge body. In addition, by arranging the rotatable cable fixed disc, the cable can be tensioned to ensure the tension of the cable and the carrying capacity of the suspension bridge body. Finally, by arranging the lap joint and the end support leg, multiple suspension bridge bodies can be connected in series to further increase the span.

[0080] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle-mounted large-span emergency mechanical drawbridge, characterized in that, The utility model provides a carrying vehicle, the carrying vehicle is provided with a frame, the frame is provided with a bearing frame, the frame is hinged with one end of bearing frame, and the bearing frame is used for bearing the bridge body, the bridge body includes hinged first deck and second deck, first deck is provided with cable tower near the side hinged with second deck, cable tower is hinged with first deck, and the both sides of cable tower are fixedly connected with a plurality of cable stays, and the one end of cable stay away from cable tower is connected with first deck or second deck, second deck can be folded on first deck and cable tower rotates to the position parallel with first deck to form the storage state, Second deck can be unfolded and is in the same horizontal plane with first deck and cable tower rotates to the position perpendicular with first deck to form the erection state, and the bridge body in erection state can be erected in river, gully position and be used as temporary bridge.

2. The vehicular large-span emergency mechanical drawbridge according to claim 1, wherein, The end of bearing frame near the tail of carrying vehicle is provided with a ramp assembly, the ramp assembly is hinged with the bearing frame, and the ramp assembly can be switched between the stop state and the ramp state relative to the bearing frame.

3. The vehicular large-span emergency mechanical drawbridge according to claim 1, wherein, First deck and second deck are connected through deck turnover assembly, and the deck turnover assembly can drive the bridge body to be switched between the storage state and the erection state.

4. The vehicular large-span emergency mechanical drawbridge according to claim 1, wherein The side of first deck and second deck is provided with a plurality of rotatable cable stay fixing discs, the one end of cable stay away from cable tower is connected with cable stay fixing disc, and rotating cable stay fixing disc can tension cable stay.

5. The vehicular large-span emergency mechanical drawbridge according to claim 4, wherein Cable stay fixing disc is connected with fixing disc rotating shaft, fixing disc rotating shaft is connected with fixing disc driving assembly, fixing disc driving assembly can drive fixing disc rotating shaft to rotate to realize the tensioning of cable stay, fixing disc rotating shaft is connected with rotating locking assembly, and rotating locking assembly can lock fixing disc rotating shaft.

6. The vehicular large-span emergency mechanical drawbridge according to claim 1, wherein Second deck is provided with a support leg near the bottom surface hinged with first deck, one end of support leg is hinged with second deck, support leg is connected with support leg driving assembly, support leg driving assembly can drive support leg to be switched between the storage state and the support state, the upper side of support leg is hinged with two first support plates on both sides in the length direction of bridge body, two first support plates are connected with first support plate driving assembly, and first support plate driving assembly can drive first support plate to be switched between the storage state and the support state.

7. The vehicular large-span emergency mechanical drawbridge according to claim 6, wherein First deck is provided with a cable tower limiting protrusion near the side hinged with second deck, second deck is provided with a telescopic cable tower limiting block near the side hinged with first deck, one side of support leg corresponding with cable tower is provided with a cable tower limiting column, cable tower is provided with a cable tower limiting hole, and cable tower limiting column can be inserted in cable tower limiting hole to limit cable tower.

8. The vehicular large-span emergency mechanical drawbridge according to claim 6, wherein Support leg includes upper support leg and lower support leg, upper support leg and lower support leg are connected through support leg telescopic assembly, and support leg telescopic assembly can adjust the distance between upper support leg and lower support leg.

9. The vehicular large-span emergency mechanical drawbridge according to claim 1, wherein The end of second deck away from first deck is provided with a lap joint part, the lap joint part can bear the first deck of another bridge body to realize the series connection of a plurality of bridge bodies.

10. The vehicular large-span emergency mechanical drawbridge according to claim 9, wherein The bottom surface of second deck away from first deck is hinged with an end support leg, end support leg is connected with end support leg driving assembly, and end support leg driving assembly can drive end support leg to be switched between the storage state and the support state.

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