A middle support leg assembly and a bridge girder erection machine having the same

Abstract

The application discloses a middle support leg assembly and a bridge erecting machine with the same. The middle support leg assembly comprises a beam body sliding seat, a rotating device, a support leg upper structure and two groups of telescopic support legs. The rotating device is arranged on the upper end of the beam body sliding seat. The two groups of telescopic support legs are arranged on the two ends of the support leg upper structure and can be turned up and down. The telescopic support legs can be turned down to the vertical state. The beam body sliding seat is arranged below the support leg upper structure. The rotating part of the rotating device is connected with the support leg upper structure. The middle support leg assembly can realize the deformation of the structure through the turning of the telescopic support legs, so as to meet the requirements of the rapid erection and flexible transportation of the bridge erecting machine.

Description

Technical Field

[0001] This application relates to the field of bridge erection equipment, and more particularly to a central support leg assembly and a bridge erection machine having the same. Background Technology

[0002] A bridge launching machine is a specialized construction machine used to lift precast reinforced concrete (or prestressed concrete) beams onto bridge supports (piers). It is one of the main pieces of equipment for safe and rapid bridge construction. To ensure that the bridge launching machine can safely and stably cross the span, it is equipped with a safe and reliable support leg system.

[0003] Currently, the outrigger system of bridge erecting machines generally includes auxiliary outriggers, front outriggers, middle outriggers, and rear outriggers. The main function of the middle outrigger is to move along the bridge erecting machine and provide stable support for the entire machine on the bridge deck. Conventional middle outriggers mostly adopt a fixed, standardized structure, formed by combining multiple components. Once assembled, they generally lack the ability to rotate or deform. Therefore, they are typically transported in disassembled units and then reassembled on-site. This entire transportation and on-site assembly process is extremely labor-intensive, time-consuming, and inefficient. This is particularly problematic in emergency repair situations such as bridge deck collapses.

[0004] Therefore, it is necessary to develop a central support leg assembly and a bridge erecting machine with it to solve the above technical problems. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a middle support leg assembly and a bridge erecting machine having the same, which solves the problems of existing bridge erecting machines having middle support legs that lack the function of flipping or deforming, and having cumbersome transportation and erection processes, large workload, and low efficiency.

[0006] The present invention solves the above-mentioned technical problems mainly through the following technical solutions: A mid-support leg assembly is provided, including a beam slide, a slewing device, a support leg upper structure, and two sets of telescopic supports. The slewing device is mounted on the upper end of the beam slide. The two sets of telescopic supports are respectively mounted on both ends of the support leg upper structure, and can be flipped downwards to a vertical position. The beam slide is located below the support leg upper structure, and the slewing part of the slewing device is connected to the support leg upper structure. Furthermore, the upper end of the rotating part of the rotating device is equipped with a slider, which is slidably assembled with the upper support leg and can slide between the two ends of the upper support leg. The upper support leg is equipped with a drive mechanism that is connected to the slider and drives it to slide.

[0007] Furthermore, the upper structure of the support leg is provided with a sliding groove extending through it from top to bottom and towards both ends, and the slider is slidably mounted in the sliding groove.

[0008] Furthermore, the driving mechanism includes a push-pull device, which is mounted on the upper part of the support leg structure and is connected to the slider.

[0009] Furthermore, it also includes a lower support leg structure, the two ends of which are detachably connected to the lower ends of the two sets of telescopic support legs that are flipped to a vertical state.

[0010] Furthermore, it also includes a support leg ground beam track, which is horizontally arranged at the lower part of the support leg lower structure and extends outward toward both ends of the support leg lower structure. The lower end of the support leg lower structure is provided with a ground wheel that rolls with the support leg ground beam track, and the support leg lower structure can move between the support leg ground beam track.

[0011] Furthermore, the telescopic outrigger includes two parallel telescopic beams and a telescopic device. The two ends of the two telescopic beams are connected and fixed by connecting beams perpendicular to them. The telescopic device is installed between the two connecting beams, and one of the connecting beams is installed on the corresponding end of the outrigger superstructure through a flipping mechanism.

[0012] Furthermore, the flipping mechanism includes a connecting arm and a telescopic mechanism. One end of the connecting arm is fixedly connected to one of the connecting beams, and the other end of the connecting arm is hinged to the corresponding end of the upper structure of the leg. The telescopic mechanism is mounted on the upper or lower part of the corresponding end of the upper structure of the leg, and the telescopic end is hinged to one end of the connecting arm.

[0013] Furthermore, the lower ends of the upper structure of the outrigger are respectively provided with support bosses, and when the telescopic outrigger is flipped downward to a vertical state, its upper end abuts against the support bosses.

[0014] The beneficial effects of the center support leg assembly of this utility model are as follows: With a reasonable structural design, the structure can be flexibly deformed by flipping the telescopic outriggers, thereby meeting the needs of rapid construction and flexible transportation of the bridge erecting machine, and promoting the process of lightweight and mobile operation of the entire bridge erecting machine.

[0015] A bridge erecting machine is also provided, including a central support leg assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a diagram showing the telescopic outrigger in the outrigger assembly provided in this embodiment of the utility model after it has been flipped downwards. Figure 2 This is a top view of the telescopic outrigger in the outrigger assembly provided in this embodiment of the utility model after it has been flipped upwards and unfolded. Figure 3 This is a schematic diagram of the structure of the middle support leg assembly after it has been flipped and unfolded to the upper sides of the beam, according to an embodiment of this utility model. Figure 4 This is a schematic diagram of the structure of the middle support leg assembly stacked on the upper end of the beam according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of a structure of one embodiment of the middle support leg assembly provided in this utility model when used in conjunction with beam support; Figure 6 This is a schematic diagram of a structural embodiment of the middle support leg assembly provided in this utility model, used in conjunction with beam support. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] For details, please refer to Figure 1 and 2 This application provides a middle support leg assembly, which mainly includes four parts: beam slide 11, slewing device, upper support leg 13, and telescopic support leg 14.

[0024] The main function of the beam slide 11 is to slide on the long straight beam of the bridge erecting machine and move along the beam to any position.

[0025] The slewing device is installed at the middle of the upper end of the beam slide 11, and its slewing part can rotate 360° in the horizontal plane relative to the beam slide 11.

[0026] The upper support frame 13 is located above the slide block 11 of the beam. The rotating part of the slewing device is connected to the upper support frame 13, which can drive the upper support frame 13 to rotate 360° in the horizontal plane, so that the telescopic support legs 14 connected to both ends of the upper support frame 13 can reach the required position.

[0027] Two sets of telescopic outriggers 14 are installed at both ends of the outrigger superstructure 13, flipping up and down respectively. In actual use, before transportation, the telescopic outriggers 14 can be flipped upwards to nearly straighten, so that the entire outrigger superstructure 13 and the telescopic outriggers 14 form a horizontally unfolded "I"-shaped component. Combined with the rotation of the slewing device, the entire unfolded component is "stacked" on the upper part of the bridge girder of the bridge erecting machine, eliminating the need for manual disassembly and transportation of the outrigger superstructure 13 and the telescopic outriggers 14. Upon arrival at the construction site, the rotation of the slewing device allows the outrigger superstructure 13 to span across the bridge girder of the bridge erecting machine. Then, the telescopic outriggers 14 are flipped downwards to a vertical position. Combined with the movement of the beam slide 11 on the bridge girder of the bridge erecting machine, the telescopic outriggers 14 reach the target position and extend to support the bridge deck, thus providing stable support for the entire bridge erecting machine. After the front and rear outriggers are installed, the bridge erecting machine can then hoist and transport the bridge girders. The overall design utilizes the relative flipping of the upper support leg 13 and the telescopic support leg 14 to achieve rapid deformation of the entire middle support leg assembly. Combined with the slewing device, the upper support leg 13 can be flexibly rotated, which enables efficient and flexible operation of the transportation and erection of the middle support leg assembly. This improves the existing bridge erecting machine operation mode that requires disassembling and transporting the middle support leg and the beam, and then reassembling it on site. This gives the bridge erecting machine a high degree of mobility and maneuverability, especially in emergency response situations such as disaster relief.

[0028] It should be noted that: generally, the upper and lower ends of the bridge girder of the bridge erecting machine are equipped with sliding tracks along its length, and the girder slide block 11 is equipped with a groove that matches the sliding track (see...). Figure 3 The two components slide tightly together, allowing the entire middle support leg assembly to move along the bridge girder of the bridge erecting machine. A movable lifting trolley is mounted on the sliding track at the lower end of the girder to lift and move the girder segments. It should be noted that the movement of the girder slide 11 on the sliding track of the girder can be achieved by configuring an independent moving mechanism (such as a combination of rollers and a power motor, which is a conventional power configuration of existing bridge erecting machines and will not be elaborated here), or by connecting the girder slide 11 and the lower lifting trolley using a connector. Specifically, pin seats are installed on the outer sides of both ends of the girder slide 11, and corresponding pin seats are also installed on both ends of the lifting trolley. After the lifting trolley moves to below the girder slide 11, the corresponding pin seats are aligned vertically and then a pin is inserted, connecting the lifting trolley and the girder slide 11 together. The movement of the lifting trolley along the girder allows the entire middle support leg assembly to move on the girder.

[0029] The shape of the beam slide 11 is not limited, as long as the upper part is flat and does not affect the rotation of the upper support 13, and the design size is appropriate.

[0030] The upper structure 13 of the support leg is a long strip-shaped component with a certain length, ensuring that after the telescopic support leg 14 is flipped down to a vertical state, the distance between the two sets of telescopic support legs 14 is at least sufficient to allow beams, transport vehicles, etc. to pass through.

[0031] The telescopic outrigger 14 is a long, straight outrigger that can be flexibly extended and retracted to meet the suspension height requirements of the bridge erecting machine beam.

[0032] In some embodiments, see Figures 1 to 4 There will be working conditions where the beam body moves laterally relative to the upper support frame 13 to adjust its position. Therefore, the slewing device and the upper support frame 13 adopt an assembly structure that can move laterally, allowing the upper support frame 13 to move laterally relative to the slewing device (that is, relative to the beam body slide 11).

[0033] Specifically, a slider 121 is installed at the upper end of the rotating part of the slewing device. The slider 121 and the upper leg structure 13 are slidably assembled. The slider 121 can slide and adjust the displacement between the two ends of the upper leg structure 13. Whether it is the lateral movement adjustment of the bridge erecting machine beam or the upper leg structure 13, it can be achieved by sliding between the slider 121 and the upper leg structure 13.

[0034] More specifically, a drive mechanism (not shown in the figure) is installed on the upper support 13 to connect with and drive the slider 121 to slide. The drive mechanism provides the power for the slider 121 to translate between the two ends of the upper support 13, so as to achieve the purpose of relatively flexible movement and adjustment between the two.

[0035] In this device, an upwardly extending cylinder can be fixed on the rotating part of the rotating device. The cylinder allows the upper support frame 13 to have a certain vertical distance relative to the rotating device. A square slider 121 is mounted on the cylinder. A square groove (c in the figure) is opened in the upper support frame 13, which runs vertically through the upper part and extends towards both ends. Slides for fitting the edges of the grooves can be configured on both sides of the slider 121 to achieve a tight sliding fit between the slider 121 and the groove.

[0036] In this embodiment, the slewing device generally adopts a suitable model of slewing bearing with a hydraulic motor. The main body of the slewing device is embedded in the matching groove in the upper middle part of the beam slide 11, so as to make the entire middle support leg assembly structure more compact.

[0037] To reduce weight, the upper middle part of the beam slide 11 can be hollowed out to form a channel that runs through both ends of it, and the aforementioned slide groove is opened on the bottom wall of the channel.

[0038] In some embodiments, the drive mechanism includes a set of push-pull devices mounted on the upper part of one end of the support leg upper structure 13. The push-pull devices are connected to the corresponding end of the slider 121. In use, the push-pull devices drive the slider 121 to move relative to the slide groove, adjusting the position of the beam between the two sets of telescopic support legs 14.

[0039] In other embodiments, the drive mechanism may also use two sets of push-pull devices. The two sets of push-pull devices are respectively installed on the upper part of both ends of the upper leg structure 13, and are respectively connected to both ends of the slider 121. The two sets of push-pull devices operate synchronously, one pushes and the other pulls, so that the relative movement between the slider 121 and the upper leg structure 13 can be realized.

[0040] Specifically, the push-pull device can be a hydraulic cylinder, with the cylinder body mounted on the upper end of the support leg 13, and the telescopic rod connected to the corresponding end of the slider 121.

[0041] In some other embodiments, the drive mechanism can also be a combination structure of hydraulic motor and gear and rack. Specifically, hydraulic motors are installed on both sides of the slider 121, the hydraulic motors are connected to gears, and racks are installed on the long sides of the slide groove in the same direction as their length. The gears mesh with the racks, and the hydraulic motor drives the gears to rotate, so that the slider can move along the racks, thereby realizing the sliding of the slider 121 relative to the upper support 13.

[0042] In some embodiments, see Figure 5 It also includes the outrigger substructure 15. During on-site construction, both sets of telescopic outriggers 14 are flipped to a vertical position, and the outrigger substructure 15 is transported to the area below the telescopic outriggers 14. This allows the lower ends of the two sets of telescopic outriggers 14 to be securely assembled with the upper ends of the outrigger substructure 15, thus connecting the two sets of telescopic outriggers 14 and the outrigger substructure 15 into a whole. The outrigger substructure 15 rests on the bridge deck (ground), and with the extension and retraction of the telescopic outriggers 14, it can achieve stable support for the beam. The stability and balance of the support are both good, making the operation safer and more reliable.

[0043] In addition, a walking structure can be installed at the bottom of the leg substructure 15, which can move along the width of the bridge deck to meet the lateral movement requirements of the bridge erecting machine when laying different beams.

[0044] In this embodiment, the length of the lower support frame 15 is the same as the length of the upper support frame 13. During operation, the lower support frame 15, the upper support frame 13, and the two sets of telescopic support legs 14 form a "U"-shaped frame.

[0045] Generally, a fixing plate is installed at the lower end of the telescopic outrigger 14 when it is in a vertical position. The fixing plate is bolted to the corresponding parts at the upper ends of the lower structure 15 of the outrigger by multiple bolts.

[0046] In other embodiments, see Figure 6It also includes the support leg ground beam track 16, which is a long straight component, much longer than the support leg substructure 15. During installation, the support leg ground beam track 16 is laid and fixed to the appropriate position on the bridge deck before the middle support leg assembly. Then, the telescopic support leg 14 is flipped down to a vertical state, and the support leg substructure 15 is installed at the lower end. The support leg substructure 15 is then supported by the support leg ground beam track 16 through the ground wheel at the lower end, and can roll between the two ends of the support leg ground beam track 16. This allows the entire middle support leg assembly and the bridge erecting machine to move laterally relative to the support leg ground beam track 16 or the bridge deck, meeting the requirements for the lateral laying of different beams.

[0047] Generally, the support leg ground beam track 16 adopts a ladder-shaped structural design, including two long straight track beams and multiple short beams vertically connected between the track beams. Ground wheel grooves extending to both ends are provided on the upper part of the two long straight track beams. The ground wheels at the bottom of the support leg substructure 15 are embedded in the ground wheel grooves and can roll along the grooves. The structure is relatively simple.

[0048] The lower support frame 15 and the support frame ground beam track 16 are slidably assembled. A limiting groove can be provided along the length of the upper part of the two track beams. Limiting blocks are embedded in the limiting grooves on both sides of the lower support frame 15 corresponding to the ground wheel. The ground wheel passes through the limiting groove and is embedded in the ground wheel groove on the bottom wall of the limiting groove. The ground wheel can be powered (e.g., by a motor), allowing the lower support frame 15 to slide along the support frame ground beam track 16, or allowing the support frame ground beam track 16 to move along the beam body together with the lower support frame 15 and the middle support frame assembly. The limiting groove is a hollow T-shaped groove extending to both ends of the support frame ground beam track 16. An opening is provided at the top of the limiting groove for the ground wheel to enter. The limiting blocks on both sides are stepped and are engaged with the inner walls of the limiting groove. When suspended, the support frame ground beam track 16 will not fall off. During assembly, the limiting blocks simply enter from one end of the limiting groove.

[0049] In this embodiment, the support leg ground beam track 16 adopts a multi-segment split design, which facilitates disassembly and stacking during transportation and saves transportation space. Specifically, the support leg ground beam track 16 includes at least two long strip track segments. In use, each track segment is arranged in a straight line, and the ends are connected and fixed to each other. A transition beam can be inserted between the ends of the track beams of adjacent track segments, and then the ends of the track segments are bolted to the inserted transition beams to achieve assembly. During transportation, the multiple track segments are disassembled, stacked vertically, and placed on the support leg underframe 15, then bundled and fixed as a whole, and mounted on the same part of the transport vehicle or transport carrier.

[0050] In some embodiments, see Figure 1The telescopic outrigger 14 includes two parallel telescopic beams 141 and a telescopic device 142. Specifically, a connecting beam is vertically fixed between each end of the two telescopic beams 141, and the telescopic device 142 is installed between the two connecting beams. During the telescopic movement of the telescopic device 142, the two telescopic beams 141 can be driven to extend or shorten synchronously. One of the connecting beams near the upper structure 13 of the outrigger is connected and assembled to the corresponding end of the upper structure 13 of the outrigger through a flipping mechanism, which can drive the telescopic outrigger 14 to flip up and down.

[0051] In this embodiment, when the telescopic outrigger 14 is flipped to the vertical position, the lower ends of the two telescopic beams 141 are respectively connected and assembled to the upper parts of the corresponding ends of the outrigger lower structure 15. Specifically, the aforementioned fixing plate is installed at the end of each telescopic beam 141.

[0052] The telescopic device 142 can use a hydraulic cylinder of a suitable model. Different numbers of hydraulic cylinders can be designed according to actual usage requirements. The cylinder body end and the telescopic rod end of the hydraulic cylinder are respectively assembled with the middle of the two connecting beams through the seat body that is hinged to it. This connection method is a conventional mechanical structure and will not be described in detail here.

[0053] In this embodiment, the telescopic beam-column 141 includes two sets of hollow beam-column sections that are interlocked with each other, specifically beam-column sections with a square cross-section.

[0054] In some other embodiments, the aforementioned telescopic device 142 can be provided in two sets, and each set is installed inside the telescopic beam 141, adopting a concealed installation structure.

[0055] In some embodiments, the flipping mechanism includes a connecting arm (represented by a in the figure) and a telescopic mechanism (not shown in the figure). One end of the connecting arm is connected and fixed to a connecting beam near the corresponding end of the telescopic outrigger 14, and the other end of the connecting arm is hinged to the corresponding end of the outrigger upper structure 13. The telescopic mechanism is mounted on the upper or lower part of the corresponding end of the outrigger upper structure 13, and the telescopic end is hinged to one end of the connecting arm. During the telescopic process, the telescopic mechanism drives the connecting arm to flip up and down around the hinge point with the outrigger upper structure 13, thereby realizing the up and down flipping of the telescopic outrigger 14.

[0056] More specifically, a through slot is provided in the middle region of the corresponding end of the upper leg 13. One end of the connecting arm passes through the slot and is rotatably connected to both sides of the slot via a pin. The telescopic mechanism can be mounted on the upper part of the corresponding end of the upper leg 13 and connected to one end of the connecting arm. Alternatively, the telescopic mechanism can be connected to one end of the connecting arm via a connecting rod.

[0057] The telescopic mechanism can use a hydraulic cylinder of a suitable model. The end of the hydraulic cylinder body away from the telescopic rod is mounted in the slot through a suitable hinge seat.

[0058] In some other embodiments, the tilting mechanism can employ a transmission structure of a hydraulic motor, gear, and connecting arm. Specifically, referring to the aforementioned design where a through slot is provided in the middle region of the corresponding end of the support leg 13, one end of the connecting arm is fixedly connected to a connecting beam near the corresponding end of the telescopic support leg 14. The other end of the connecting arm extends into the aforementioned slot and is circular with at least a half-circle of teeth on its outer edge. The hydraulic motor and gear are mounted in the aforementioned slot, with the gear connected to the shaft of the hydraulic motor and meshing with the teeth at the other end of the connecting arm. Alternatively, the hydraulic motor can be replaced with a worm gear and worm shaft structure, with a gear connected to the end face of the worm gear and meshing with the teeth at the other end of the connecting arm. This structure enables self-locking, allowing the telescopic support leg 14 to maintain an upward tilting posture. It should be noted that in the bridge erecting machine, the upward tilting posture of the telescopic support leg 14 is actually during transportation; therefore, this posture may not be required.

[0059] In actual use, when the telescopic outrigger 14 is flipped to the vertical position, there may be a gap between it and the lower part of the corresponding end of the outrigger upper structure 13. Considering the need for stable support in actual operation, a downward protruding support boss (represented by b in the figure) is provided at the lower part of the corresponding end of the outrigger upper structure 13. The lower surface of the support boss is a horizontal plane. When the telescopic outrigger 14 is in the vertical position, its upper end is exactly against the lower surface of the support boss, thus achieving stable support.

[0060] A protruding side plate can be provided at the lower edge of the support boss, and a flat plate is provided at the upper end of the telescopic leg 14 in the vertical state. The flat plate fits with the side plate to increase the contact area between the support boss and the telescopic leg 14.

[0061] Two support bosses can be provided, each corresponding to one of the two telescopic beams 141 of each telescopic leg 14. When the telescopic leg 14 is in a vertical state, the upper ends of the two telescopic beams 141 abut against the lower ends of the corresponding support bosses.

[0062] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0063] This application embodiment also provides a bridge erecting machine, including the aforementioned middle support leg assembly. The beam slide 11 of the middle support leg assembly is assembled on the upper end of the beam of the bridge erecting machine (D in the figure), and can slide along the beam (the specific assembly and sliding cooperation are described above and will not be repeated here). After the telescopic support leg 14 is flipped downward to a vertical state, the height of the telescopic support leg 14 is adjusted so that the beam is stably supported on the bridge deck, thereby carrying out subsequent bridge erecting operations. During transportation, the telescopic support leg 14 of the middle support leg assembly is flipped upward to present an unfolded posture and "stacked" on the upper end of the beam, which is convenient for overall transportation with the beam. Before transportation, there is no need to disassemble the branch leg superstructure 13 and the telescopic support leg 14 for loading. After transportation, only the middle support leg assembly needs to be moved on the beam, and the telescopic support leg 14 needs to be flipped to a vertical position and then telescopically adjusted to height, so as to realize the rapid construction and subsequent operation of the bridge erecting machine, realize the purpose of rapid mobile operation of the bridge erecting machine, and improve the emergency response operation capability of the bridge erecting machine in emergency situations.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0065] The foregoing has provided a detailed description of a middle support leg assembly and a bridge erecting machine having the same, as provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A type of outrigger assembly, characterized in that: It includes a beam slide (11), a slewing device, a leg upper structure (13), and two sets of telescopic legs (14). The slewing device is mounted on the upper end of the beam slide (11). The two sets of telescopic legs (14) are respectively mounted on both ends of the leg upper structure (13) and can be flipped down to a vertical state. The beam slide (11) is located below the leg upper structure (13), and the slewing part of the slewing device is connected to the leg upper structure (13).

2. The mid-mounted outrigger assembly according to claim 1, characterized in that: The upper end of the rotating part of the rotating device is equipped with a slider (121). The slider (121) is slidably assembled with the upper support leg (13) and can slide between the two ends of the upper support leg (13). The upper support leg (13) is equipped with a drive mechanism that is connected to the slider (121) and drives it to slide.

3. A mid-mounted outrigger assembly according to claim 2, characterized in that: The upper part of the leg (13) is provided with a sliding groove extending from top to bottom toward both ends, and the slider (121) is slidably mounted in the sliding groove.

4. A mid-mounted outrigger assembly according to claim 3, characterized in that: The drive mechanism includes a push-pull device, which is mounted on the upper part of the support leg upper structure (13) and is connected to both ends of the slider (121).

5. A mid-mounted outrigger assembly according to claim 1, characterized in that: It also includes a lower support leg structure (15), the two ends of which are detachably connected to the lower ends of the two sets of telescopic support legs (14) that are flipped to the vertical state.

6. A mid-mounted outrigger assembly according to claim 5, characterized in that: It also includes a support leg ground beam track (16), which is horizontally arranged at the lower part of the support leg lower structure (15) and extends outward toward both ends of the support leg lower structure (15). The lower end of the support leg lower structure (15) is provided with a ground wheel that rolls with the support leg ground beam track (16), and the support leg lower structure (15) can move between the support leg ground beam track (16).

7. A mid-support leg assembly according to any one of claims 1 to 6, characterized in that: The telescopic outrigger (14) includes two parallel telescopic beams (141) and a telescopic device (142). The two ends of the two telescopic beams (141) are connected and fixed by a connecting beam perpendicular to them. The telescopic device (142) is installed between the two connecting beams. One of the connecting beams is installed on the corresponding end of the upper structure (13) of the outrigger through a flipping mechanism.

8. A mid-mounted outrigger assembly according to claim 7, characterized in that: The flipping mechanism includes a connecting arm and a telescopic mechanism. One end of the connecting arm is fixedly connected to one of the connecting beams, and the other end of the connecting arm is hinged to the corresponding end of the upper support leg (13). The telescopic mechanism is installed on the upper or lower part of the corresponding end of the upper support leg (13), and the telescopic end is hinged to one end of the connecting arm.

9. A center outrigger assembly according to any one of claims 1 to 6, characterized in that: The lower ends of the upper part of the support leg (13) are respectively provided with support bosses. When the telescopic support leg (14) is flipped down to the vertical state, its upper end abuts against the support bosses.

10. A bridge erecting machine, characterized in that: Includes the center outrigger assembly as described in any one of claims 1 to 9.

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