Rear supporting leg and bridge girder erection machine

Abstract

The utility model relates to the technical field of construction mechanical equipment, and provides a rear supporting leg and a bridge girder erection machine. The rear supporting leg comprises a frame body, a synchronous rod, a steering driving piece, a plurality of walking wheel sets and a plurality of steering structures. In the height direction of the frame body, one side of the frame body is connected with the main beam, a plurality of steering structures are arranged on the other side of the frame body in the length direction of the frame body at intervals, each steering structure is rotationally connected with the frame body, and the walking wheel sets are connected with the steering structures in a one-to-one correspondence mode; the steering driving part is arranged on the frame body and connected with any steering structure, and the synchronous rod is arranged on the sides, in the width direction of the frame body, of the multiple steering structures and extends in the length direction of the frame body. The multiple steering structures are connected through the synchronous rod, so that the steering driving piece drives the multiple steering structures to rotate by the same angle in the same direction. The position of the frame body on the curve road section is adjusted through steering of the walking wheel sets, and position deviation of the bridge erecting machine after passing through the curve road section is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of construction machinery and equipment, and particularly relates to a rear support leg and a bridge erecting machine. Background Art

[0002] A bridge erecting machine is a commonly used device for transporting and placing beam slabs on preset bridge piers. The bridge erecting machine includes a main beam, a front support leg provided at the front end of the main beam, and a rear support leg provided at the rear end of the main beam. The front support leg and the rear support leg support the main beam on the ground. Travel wheels are usually provided on the front support leg and the rear support leg. When the bridge erecting machine travels, the travel wheels roll to move the bridge erecting machine on the ground. However, the traveling direction of the travel wheels on the existing support legs is arranged along the longitudinal direction of the main beam. When the traveling route of the bridge erecting machine includes a curved section and a straight section connected to each other, after the front end of the bridge erecting machine passes through the curved section, the rear support leg will shift when traveling on the curved section, causing the main beam of the bridge erecting machine to shift from the center line of the subsequent straight section after the whole bridge erecting machine passes through the curved section, so that the bridge erecting machine needs to adjust its orientation before performing subsequent through-hole erection operations, which affects the working efficiency of the bridge erecting machine. Summary of the Utility Model

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a rear support leg and a bridge erecting machine.

[0004] The present disclosure provides a rear support leg for being installed on the main beam of a bridge erecting machine, including a frame body, a synchronous rod, a steering drive member, a plurality of traveling wheel sets, and a plurality of steering structures;

[0005] Along the height direction of the frame body, one side of the frame body is connected to the main beam, and a plurality of the steering structures are arranged at intervals along the length direction of the frame body on the other side. Each of the steering structures is rotatably connected to the frame body, and the plurality of traveling wheel sets are correspondingly connected to the plurality of steering structures;

[0006] The steering drive member is arranged on the frame body and connected to any one of the steering structures. The synchronous rod is arranged on one side of the plurality of steering structures along the width direction of the frame body and extends along the length direction of the frame body;

[0007] The plurality of steering structures are connected to each other through the synchronous rod, so that the steering drive member drives the plurality of steering structures to rotate in the same direction by the same angle.

[0008] Optionally, the traveling wheel set includes a wheel body, a fixed arm, a telescopic arm, and a connecting arm;

[0009] One end of the fixed arm is connected to the steering structure, and the other end is rotatably connected to the connecting arm. One end of the telescopic arm is rotatably connected to the fixed arm, and the other end is rotatably connected to the end of the connecting arm away from the fixed arm. The telescopic arm expands and contracts relative to the fixed arm to drive the connecting arm to rotate relative to the fixed arm, and the wheel body is rotatably connected to the connecting arm.

[0010] Optionally, the traveling wheel set further includes a motor, the motor is arranged on the fixed arm, and the output end of the motor is connected to the wheel body so that the motor drives the wheel body to rotate.

[0011] Optionally, the wheel body includes a wheel axle and two tires. The middle of the wheel axle is rotatably connected to the connecting arm, and both ends of the wheel axle are respectively connected to the two tires.

[0012] Optionally, the number of both the steering structure and the traveling wheel set is two;

[0013] On one side of the frame body close to the traveling wheel set, there are two first mounting parts and two second mounting parts. The two first mounting parts are arranged at intervals along the transverse direction of the main beam. Both of the two second mounting parts are arranged between the two first mounting parts, and the two second mounting parts are arranged at intervals along the transverse direction of the main beam. The two first mounting parts are symmetrically arranged with respect to the midpoint of the frame body along the transverse direction of the main beam, and the two second mounting parts are symmetrically arranged with respect to the midpoint of the frame body along the transverse direction of the main beam;

[0014] The two steering structures are respectively connected to the two first mounting parts so that the two traveling wheel sets are respectively mounted on the two first mounting parts, or the two steering structures are respectively connected to the two second mounting parts so that the two traveling wheel sets are respectively mounted on the two second mounting parts.

[0015] Optionally, the steering structure includes a first disk body and a second disk body. The first disk body is connected to the frame body, the second disk body is rotatably connected to the side of the first disk body away from the frame body, the traveling wheel set is fixedly connected to the second disk body, and the steering driving member is connected to the second disk body;

[0016] The second disk bodies of the multiple steering structures are rotatably connected to the synchronizing rod.

[0017] Optionally, the steering driving member includes a telescopic oil cylinder. The telescopic oil cylinder has a telescopic end that can extend and retract. The telescopic oil cylinder is rotatably connected to the side of the frame body facing the traveling wheel set, and the telescopic end is rotatably connected to the second disk body. The telescopic end extends and retracts relative to the telescopic oil cylinder to drive the second disk body to rotate relative to the first disk body.

[0018] Optionally, a connecting portion is provided at the edge of the second disc body. The synchronizing rod extends along the length direction of the frame body, and the connecting portion extends radially toward the synchronizing rod along the second disc body. The connecting portions of the plurality of second disc bodies are all rotatably connected to the synchronizing rod.

[0019] Optionally, the rear leg further includes a rotating portion and a flipping driving member. The rotating portion is disposed on a side of the frame body close to the main beam. The rotating portion is rotatably connected to the main beam. The flipping driving member is connected between the main beam and the frame body to drive the frame body to rotate between a working position perpendicular to the main beam and a flipping position attached to one side of the main beam.

[0020] The present disclosure also provides a bridge erecting machine, including a main beam and the rear leg according to any one of the above.

[0021] One side of the frame body away from the plurality of steering structures is connected to the main beam. The width direction of the frame body is the same as the transverse direction of the main beam.

[0022] The technical solution provided by the present disclosure has the following advantages compared with the prior art:

[0023] For the rear leg provided by the present disclosure, a plurality of steering structures are rotatably connected to one side of the frame body, and a plurality of traveling wheel sets are respectively connected to the plurality of steering structures, so that the plurality of traveling wheel sets support the frame body and the main beam on the ground; the synchronizing rod is rotatably connected to the plurality of steering structures, and the steering driving member is connected between one steering structure and the frame body, so that when the steering driving member drives one steering structure to rotate, the other steering structures can be driven to rotate in the same direction by the same angle through the synchronizing rod, realizing simultaneous adjustment of the traveling directions corresponding to the plurality of traveling wheel sets; when the rear leg travels on a curved section, the plurality of traveling wheel sets instantaneously adjust the traveling direction according to the curved section to instantaneously adjust the position of the main beam on the curved section, so that the rear leg moves on the center line of the curved section. Therefore, after the bridge erecting machine passes through the curved section, the main beam is on the center line of the subsequent section of the curved section, avoiding the need to adjust the orientation and position of the bridge erecting machine after passing through the curved section to perform subsequent through-hole erection operations, thereby improving the working efficiency of the bridge erecting machine. Description of the Drawings

[0024] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 One of the schematic structural diagrams of the rear outrigger described in the embodiments of the present disclosure;

[0027] Figure 2 Another schematic structural diagram of the rear outrigger described in the embodiments of the present disclosure;

[0028] Figure 3 The front view of the girder erecting machine described in the embodiments of the present disclosure;

[0029] Figure 4 The side view of the girder erecting machine described in the embodiments of the present disclosure;

[0030] Figure 5 The front view of the traveling wheel set described in the embodiments of the present disclosure;

[0031] Figure 6 For Figure 5 The sectional view taken along the A-A direction in

[0032] Figure 7 The side perspective view of the traveling wheel set described in the embodiments of the present disclosure.

[0033] Wherein, 1. Frame main body; 11. Rotating part; 12. Tipping drive member; 13. First mounting part; 14. Second mounting part; 2. Steering structure; 21. First disc body; 22. Second disc body; 221. Connecting part; 3. Traveling wheel set; 31. Wheel body; 311. Tire; 312. Wheel axle; 32. Fixed arm; 33. Connecting arm; 34. Telescopic arm; 4. Synchronous rod; 5. Steering drive member; 6. Main beam. Detailed implementation manners

[0034] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present disclosure, the following will further describe the solutions of the present disclosure. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0036] Refer to Figures 1 to 7As shown in the figure, an embodiment of the present disclosure provides a rear outrigger for being installed on the main beam 6 of a bridge erecting machine, which includes a frame body 1, a synchronous rod 4, a steering drive member 5, a plurality of traveling wheel sets 3, and a plurality of steering structures 2; along the height direction of the frame body 1, one side of the frame body 1 is connected to the main beam, and on the other side, a plurality of steering structures 2 are arranged at intervals along the length direction of the frame body 1. Each steering structure 2 is rotatably connected to the frame body 1, and the plurality of traveling wheel sets 3 are connected to the plurality of steering structures 2 in a one-to-one correspondence; the steering drive member 5 is arranged on the frame body 1 and connected to any one of the steering structures 2, and the synchronous rod 4 is arranged on one side of the plurality of steering structures 2 along the width direction of the frame body 1 and extends along the length direction of the frame body 1; the plurality of steering structures 2 are connected to each other through the synchronous rod 4 so that the steering drive member 5 drives the plurality of steering structures 2 to rotate in the same direction by the same angle.

[0037] Specifically, when the main beam 6 is in use, it is usually parallel to the bridge deck. Of course, when the bridge erecting machine is used on the ground, the main beam 6 is parallel to the ground; the extending direction of the main beam 6 is the longitudinal direction of the main beam 6, and the direction perpendicular to the extension of the main beam 6 in the horizontal direction is the transverse direction of the main beam 6. The longitudinal direction of the main beam 6 is the orientation of the main beam 6. The main beam 6 has a front end and a rear end. Outriggers are provided at both the front end and the rear end of the main beam 6. The main beam 6 is supported on the bridge deck or the pier through the outriggers at the front end and the rear end. The outrigger at the front end of the main beam 6 serves as the front outrigger of the main beam 6 to support the front end of the main beam 6, while the rear outrigger formed by the frame body 1, the synchronous rod 4, the steering drive member 5, the plurality of traveling wheel sets 3, and the plurality of steering structures 2 is arranged at the rear end of the main beam 6 to support the rear end of the main beam 6.

[0038] When the bridge erecting machine is being erected, the bridge erecting machine is first located on the bridge deck at the bridge head, and then the bridge erecting machine moves so that a part of the main beam extends out of the bridge deck, enabling the front outrigger at the front end of the main beam 6 to support on the pier in front of the bridge head, thereby completing the overhanging erection operation of the bridge erecting machine. To ensure the convenience of subsequent beam transportation and installation, the bridge erecting machine needs to be located on the center line of the bridge deck at the bridge head before erection. Thus, after the bridge erecting machine moves along the center line of the bridge deck for erection, the main beam 6 of the bridge erecting machine can be on the center line of the bridge deck of the bridge to be erected, enabling the beam to be conveniently and accurately installed at the required position after being transported through the main beam 6.

[0039] When the traveling route of the bridge erecting machine includes interconnected curved sections and straight sections, since the traveling direction of the wheel bodies on the rear outrigger of the traditional bridge erecting machine is consistent with the longitudinal direction of the main beam 6, after the front end of the main beam 6 passes through the curved section, the rear outrigger at the rear end of the main beam 6 will deviate from the center line of the curved section when traveling on the curved section, resulting in an angle between the main beam 6 of the bridge erecting machine and the center line of the subsequent straight section of the curved section after the bridge erecting machine passes through the curved section, and the bridge erecting machine needs to adjust its orientation before erection.

[0040] However, for the rear outriggers provided by the present disclosure, the steering structure 2, in cooperation with the steering drive member 5 and the synchronizing rod 4, can change the traveling directions of multiple traveling wheel sets 3. When the rear outriggers travel on a curved section, the multiple traveling wheel sets 3 adjust their traveling directions according to the curved section, enabling the rear outriggers to move along the center line of the curved section. As a result, after the bridge erecting machine passes through the curved section, the main beam of the bridge erecting machine is arranged along the center line of the subsequent straight section, allowing the bridge erecting machine to perform subsequent span erection operations without adjusting its orientation after passing through the curved section.

[0041] The above-mentioned frame body 1 can be selectively connected to the side surface of the main beam 6 facing the ground. The frame body 1 is perpendicular to the main beam 6, enabling the frame body 1 to support the main beam 6. For example, Figure 1 and Figure 2 As shown, when the frame body 1 supports the main beam 6 on the bridge deck or the ground, the vertical direction is the height direction c of the frame body 1. The length direction a and the width direction b of the frame body 1 are perpendicular to the height direction c, and the length direction a of the frame body 1 is the same as the longitudinal direction of the main beam 6, while the width direction b of the frame body 1 is the same as the transverse direction of the main beam 6.

[0042] The number of the above-mentioned traveling wheel sets 3 and the steering structure 2 can both be selectively two. The two steering structures 2 are arranged at intervals along the length direction a of the frame body 1. The two traveling wheel sets 3 are connected to the two steering structures 2, enabling the two traveling wheel sets 3 to support the frame body 1 on the ground. When the traveling wheel set 3 includes a wheel body 31, the rotation of the wheel body 31 allows the frame body 1 to move on the ground. The direction in which the wheel body 31 advances when rotating on the ground is the traveling direction of the traveling wheel set 3. When the bridge erecting machine adjusts the orientation of the main beam 6, the traveling wheel set 3 rotates relative to the frame body 1, changing the traveling direction of the wheel body 31, thereby adjusting the moving direction of the frame body 1 and the position of the main beam 6 where the frame body 1 is provided, causing the end of the main beam 6 where the frame body 1 is provided to move relative to the end of the main beam 6 away from the frame body 1, and thus adjusting the orientation of the main beam 6.

[0043] The above-mentioned steering structure 2 can be selectively a rotating shaft rotatably arranged on the side surface of the frame body 1 away from the main beam 6. The rotating shaft extends along the height direction c of the frame body 1. The traveling wheel set 3 is connected to the rotating shaft, and the rotating shaft drives the traveling wheel set 3 to rotate relative to the frame body 1, thereby adjusting the direction of the rotation axis of the wheel body 31 of the traveling wheel set 3 to change the advancing direction of the traveling wheel set 3 driving the frame body 1, and thus adjusting the position of the main beam 6 to facilitate the bridge erecting machine to pass through a curved section. Of course, it is also possible to select a flange plate connected to the side surface of the frame body 1 away from the main beam 6 as the steering structure. A rotating shaft rotatably connected to the frame body 1 is provided on the flange plate. The traveling wheel set 3 is connected to the flange plate, and when the flange plate rotates relative to the frame body 1, it drives the traveling wheel set 3 to rotate relative to the frame body 1 to adjust the corresponding traveling direction of the traveling wheel set 3.

[0044] The above-mentioned steering drive member 5 can be selected as a hydraulic cylinder or a hydraulic air cylinder. The hydraulic cylinder or the hydraulic air cylinder has a telescopic end that can expand and contract. The hydraulic cylinder or the hydraulic air cylinder is connected to the frame body, and the telescopic end of the hydraulic cylinder or the hydraulic air cylinder is connected to the rotating shaft, so that when the telescopic end expands and contracts, it can drive the rotating shaft to drive the running wheel set 3 to rotate. Of course, the steering drive member 5 can also be selected as a motor. A rack is arranged on the periphery of the steering structure 2. The motor is installed on the frame body 1, and a gear is arranged at the output end of the motor. The gear at the output end of the motor meshes with the rack on the periphery of the steering structure 2, and the output end of the motor rotates to drive the steering structure 2 to rotate through the cooperation of the gear and the rack.

[0045] The above-mentioned synchronizing rod 4 can be selected as a straight rod extending along the width direction of the frame body 1. The synchronizing rod 4 is arranged on one side of the frame body 1 along the width direction b of the frame body 1, so that the synchronizing rod 4 is located on the same side of multiple steering structures 2, and the distances between the synchronizing rod 4 and multiple steering structures 2 in the width direction of the frame body 1 are equal to each steering structure 2; thus, after rotatingly connecting multiple steering structures 2 with the synchronizing rod 4, when one steering structure 2 rotates, it drives the synchronizing rod 4 to move, and the movement of the synchronizing rod 4 drives other steering structures 2 to rotate, so that the distances that the synchronizing rod 4 moves relative to each steering structure 2 are the same, so multiple steering structures 2 can rotate in the same direction by the same angle.

[0046] Multiple through holes can be selectively arranged on the above-mentioned synchronizing rod 4. There are bumps on the steering structure 2. The bumps are rotationally connected to the through holes through bolts or pin structures. The bumps of multiple steering structures 2 are respectively rotationally connected to multiple through holes in a one-to-one correspondence. Multiple steering structures 2 are simultaneously rotationally connected to the synchronizing rod 4. When the synchronizing rod 4 moves along the width direction b of the frame body 1, the synchronizing rod 4 drives multiple steering structures 2 to rotate simultaneously, and the synchronizing rod 4 is on one side of multiple steering structures 2, so that when the synchronizing rod 4 moves, it drives multiple steering structures 2 to rotate in the same direction by the same angle.

[0047] When the rear outrigger provided by the embodiment of the present disclosure is specifically used, one side of the frame body 1 along the height direction of the frame body 1 is connected to the main beam 6, multiple steering structures 2 are installed on the other side of the frame body 1, multiple running wheel sets 3 are connected to multiple steering structures 2, the synchronizing rod 4 is rotationally connected to multiple steering structures 2, and multiple running wheel sets 3 are supported on the bridge deck or the ground, so that the frame body 1 supports the main beam 6 on the ground. When the bridge erecting machine moves, the traveling directions of multiple running wheel sets 3 are arranged along the longitudinal direction of the main beam 6, so that multiple running wheel sets 3 rotate to move the frame body 1 and the main beam 6 on the ground or the bridge deck.

[0048] When the traveling route of the bridge erecting machine includes interconnected curved sections and straight sections, the rear outrigger at the rear end of the main girder 6 travels on the curved section, and the steering drive member 5 drives a steering structure 2 to rotate relative to the frame body 1. The plurality of steering structures 2 rotate in the same direction by the same angle through the synchronizing rod 4, thereby changing the traveling directions of the plurality of traveling wheel sets 3 on the frame body 1, so that the traveling directions of the plurality of traveling wheel sets 3 are along the tangent direction of the curved section at the current position. Thus, during the whole process of the bridge erecting machine passing through the curved section, the plurality of traveling wheel sets 3 adjust their traveling directions along with the curved section to instantaneously adjust the orientation of the main girder 6, so that the rear outrigger moves along the center line of the curved section; after the rear outrigger passes through the curved section, the main girder 6 is located on the center line of the subsequent straight section of the curved section, which facilitates the subsequent through-hole erection operation of the bridge erecting machine.

[0049] The rear outrigger provided by the embodiment of the present disclosure rotatably connects a plurality of steering structures 2 on one side of the frame body 1. The plurality of traveling wheel sets 3 are correspondingly connected to the plurality of steering structures 2, so that the plurality of traveling wheel sets 3 support the frame body 1 and the main girder 6 on the ground; the synchronizing rod 4 is rotatably connected to the plurality of steering structures 2, and the steering drive member 5 is connected between one steering structure 2 and the frame body 1, so that when the steering drive member 5 drives one steering structure 2 to rotate, the other steering structures 2 can be driven to rotate in the same direction by the same angle through the synchronizing rod 4, realizing the simultaneous adjustment of the traveling directions corresponding to the plurality of traveling wheel sets 3; when the rear outrigger travels on the curved section, the plurality of traveling wheel sets 3 instantaneously adjust their traveling directions according to the curved section to instantaneously adjust the position of the main girder 6 on the curved section, so that the rear outrigger moves on the center line of the curved section. Thus, after the bridge erecting machine passes through the curved section, the main girder 6 is on the center line of the subsequent section of the curved section, avoiding the need to adjust the orientation and position of the bridge erecting machine after passing through the curved section to perform the subsequent through-hole erection operation, thereby improving the working efficiency of the bridge erecting machine.

[0050] Referring to Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown in

[0051] One end of the fixed arm 32 is connected to the steering structure 2, and the other end is rotatably connected to the connecting arm 33. One end of the telescopic arm 34 is rotatably connected to the fixed arm 32, and the other end is rotatably connected to the end of the connecting arm 33 away from the fixed arm 32. The telescopic arm 34 expands and contracts relative to the fixed arm 32 to drive the connecting arm 33 to rotate relative to the fixed arm 32. The wheel body 31 is rotatably connected to the connecting arm 33. With such a setting, the elongation and shortening of the telescopic arm 34 can adjust the relative position between the wheel body 31 and the frame body 1, forming a suspension system for the wheel body 31 by the fixed arm 32, the telescopic arm 34 and the connecting arm 33. When the wheel body 31 rolls on the ground or the bridge surface, the wheel body 31 can be fully in contact with the ground or the bridge surface, so that the forces on each part of the wheel body 31 are evenly distributed, and the suspension system formed by the telescopic arm 34, the connecting arm 33 and the fixed arm 32 can absorb part of the vibration, thereby reducing the bump of the bridge erecting machine during the traveling process.

[0052] Specifically, the wheel body 31 can be selected to have a rotating shaft, the rotating shaft is rotatably connected to the connecting arm 33, and the rotating shaft of the wheel body 31 is perpendicular to the connecting arm 33. Of course, bolts or pins can also be selected to rotatably connect the wheel body 31 to the connecting arm 33.

[0053] The above-mentioned fixed arm 32 and connecting arm 33 can be selected to be rod-shaped structural members. One end of the fixed arm 32 is fixedly connected to the steering structure 2, and the other end extends in the height direction c of the frame body 1 away from the frame body 1. One end of the connecting arm 33 can be rotatably connected to the end of the fixed arm 32 away from the frame body 1 by bolts or pins, and the other end of the connecting arm 33 can be rotatably connected to the telescopic arm 34 by bolts or pins; the telescopic arm 34 can be selected as a telescopic oil cylinder, the telescopic oil cylinder has a telescopic end that can expand and contract, the telescopic oil cylinder is connected to the frame body 1, and the telescopic end is connected to the connecting arm 33.

[0054] The two ends of the above-mentioned telescopic arm 34 are respectively rotatably connected to the fixed arm 32 and the connecting arm 33. It can be selected that the telescopic arm 34 is connected to the end of the fixed arm 32 away from the connecting arm 33, and the telescopic arm 34 is connected to the end of the connecting arm 33 away from the fixed arm 32, so that the fixed arm 32, the connecting arm 33 and the telescopic arm 34 jointly form a structure similar to a triangle. The telescopic arm 34 changes the distance between its two ends by telescoping, thereby changing the shape of the triangle structure formed by the fixed arm 32, the connecting arm 33 and the telescopic arm 34.

[0055] The increase in the distance between the two ends of the telescopic arm 34 is the elongation of the telescopic arm 34, and the decrease in the distance between the two ends of the telescopic arm 34 is the shortening of the telescopic arm 34. When the telescopic arm 34 elongates, the connecting arm 33 rotates relative to the fixed arm 32 in a direction away from the frame body 1, causing the wheel body 31 on the connecting arm 33 to move in a direction away from the frame body 1, so that the wheel body 31 can fully abut against the ground. When the bridge erecting machine passes through a pothole, the acting force exerted on the connecting arm 33 by the elongation of the telescopic arm 34 can enable the wheel body 31 to abut against the bottom surface of the pothole in a timely manner, reducing the jolting when the bridge erecting machine passes through the pothole. That is, the fixed arm 32, the telescopic arm 34, and the connecting arm 33 form a suspension system for the wheel body 31, enabling the wheel body 31 to fully abut against the ground when rolling on various ground surfaces.

[0056] Referring to Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the traveling wheel set 3 further includes a motor. The motor is disposed on the fixed arm 32, and the output end of the motor is connected to the wheel body 31 so that the motor drives the wheel body 31 to rotate. With this arrangement, the motor can drive the wheel body 31 to rotate, so that when the wheel body 31 rotates on the ground, it drives the frame body 1 to move, enabling the traveling wheel set 3 to actively drive the frame body 1 to move and adjust the position of the main beam 6.

[0057] Specifically, it can be selected that the motor is disposed on the fixed arm 32, and the output end of the motor can rotate relative to the motor. The output end of the motor can be directly connected to the rotating shaft of the wheel body 31, so that the motor drives the wheel body 31 to rotate after starting. Of course, it can also be selected that the output end of the motor is provided with a gear, and an annular rack is provided on the wheel body 31, and the gear meshes with the annular rack, so that when the output end of the motor rotates, the wheel body 31 is driven to rotate through the annular rack and the gear.

[0058] Referring to Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the wheel body 31 includes a wheel axle 312 and two tires 311. The middle of the wheel axle 312 is rotatably connected to the connecting arm 33, and the two ends of the wheel axle 312 are respectively connected to the two tires 311. With this arrangement, the rotation of the wheel axle 312 on the connecting arm 33 can cause the two tires 311 to rotate. The two tires 311 share the load borne by the frame body 1 on both sides of the connecting arm 33, and when the telescopic arm 34 exerts a force on the connecting arm 33 away from the frame body 1, the two tires 311 on both sides of the connecting arm 33 can evenly distribute the load borne by the connecting arm 33, enabling the wheel body 31 to maintain balance when supported on the ground and improving the stability of the traveling wheel set 3 supported on the ground.

[0059] Specifically, the axle 312 can be selected as a cylindrical shaft body, and the tire 311 can be a tire with a hub and a tread. It can be selected to provide bearings on the connecting arm 33, and the axle 312 is connected to the bearings, so that the axle 312 can rotate on the connecting arm 33, and the axle 312 is parallel to the ground on the connecting arm 33. Two tires 311 are connected to both ends of the axle 312, so that the two tires 311 can contact the ground, and when the axle 312 rotates, it can drive the two tires 311 to rotate. Of course, it can also be selected that the connecting arm 33 is provided with a through hole, the through hole penetrates the connecting arm 33 along the direction parallel to the ground, the axle 312 is inserted into the through hole, and there is a gap between the axle 312 and the through hole, so that the axle 312 can rotate on the connecting arm 33. Two tires 311 are connected to both ends of the axle 312 to abut against the ground, so that the two tires 311 support the frame body 1 on the ground.

[0060] Referring to Figure 1 and Figure 4 As shown, in some embodiments, the number of the steering structures 2 and the running wheel sets 3 is two each; on one side of the frame body 1 close to the running wheel sets 3, there are provided two first mounting parts 13 and two second mounting parts 14. The two first mounting parts 13 are arranged at intervals in the transverse direction of the main beam 6, the two second mounting parts 14 are both arranged between the two first mounting parts 13, and the two second mounting parts 14 are arranged at intervals in the transverse direction of the main beam 6. The two first mounting parts 13 are symmetrically arranged with respect to the midpoint of the frame body 1 in the transverse direction of the main beam 6, and the two second mounting parts 14 are symmetrically arranged with respect to the midpoint of the frame body 1 in the transverse direction of the main beam 6; the two steering structures 2 are respectively connected to the two first mounting parts 13, so that the two running wheel sets 3 are respectively mounted on the two first mounting parts 13, or the two steering structures 2 are respectively connected to the two second mounting parts 14, so that the two running wheel sets 3 are respectively mounted on the two second mounting parts 14.

[0061] Specifically, the first mounting part 13 and the second mounting part 14 can be selected as flange parts provided on the frame body 1. The two first mounting parts 13 are arranged at both ends of the frame body 1 in the transverse direction of the main beam 6, and the two second mounting parts 14 are arranged at positions close to the middle of the frame body 1. The two first mounting parts 13 are symmetric with respect to the midpoint of the frame body 1, which can keep the rear legs in a balanced state when the two running wheel sets 3 support on the bridge deck or the ground; the two second mounting parts 14 are symmetric with respect to the midpoint of the frame body 1, which can keep the rear legs in a balanced state when the two running wheel sets 3 support on the bridge deck or the ground.

[0062] When the bridge erecting machine needs to transport double-track precast box girders, the two traveling wheel sets 3 are respectively connected to the two first mounting parts 13 through the steering structures 2, so that the distance between the two traveling wheel sets 3 is relatively large, improving the stability of the rear support leg on the bridge deck or the ground when lifting and transporting double-track precast box girders; when the bridge erecting machine needs to transport single-track precast box girders, the two traveling wheel sets 3 are respectively connected to the two second mounting parts 14 through the steering structures 2, so that the distance between the two traveling wheel sets 3 is relatively small, improving the flexibility of the rear support leg when moving on the bridge deck or the ground when lifting and transporting single-track precast box girders.

[0063] When the two traveling wheel sets 3 are connected to the two first mounting parts 13, the distance between the two traveling wheel sets 3 is relatively large. A synchronizing rod 4 with a longer length is selected to make the synchronizing rod 4 adapt to the distance between the two traveling wheel sets 3. When the two traveling wheel sets 3 are connected to the two second mounting parts 14, the distance between the two traveling wheel sets 3 is relatively small, and it is necessary to replace the synchronizing rod 4 with a shorter length so that the replaced synchronizing rod 4 can adapt to the distance between the two traveling wheel sets 3.

[0064] The above-mentioned synchronizing rod 4 can be selected to include an adjusting rod and two fitting rods. The two fitting rods are connected to the two ends of the adjusting rod through threads. Of course, it can also be selected that the two fitting rods are connected to the two ends of the adjusting rod through bolts, so that the two fitting rods are detachably connected to the two ends of the adjusting rod. The two fitting rods are respectively rotatably connected to the two steering structures 2. When the two steering structures 2 are respectively connected to the two first mounting parts 13 to make the rear support leg adapt to the double-track precast box girder, the two fitting rods are connected to the adjusting rod adapted to the distance between the two first mounting parts 13, so that the two fitting rods are arranged corresponding to the two steering structures 2 mounted on the two first mounting parts 13, so that the two fitting rods can be rotatably connected to the two steering structures 2. When the two steering structures 2 are connected to the two second mounting parts 14 to make the rear support leg adapt to the single-track precast box girder, the two fitting rods are connected to the adjusting rod adapted to the distance between the two second mounting parts 14, so that the two fitting rods are arranged corresponding to the two steering structures 2 mounted on the two second mounting parts 14, so that the two fitting rods can be rotatably connected to the two steering structures 2.

[0065] Refer to Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, the steering structure 2 includes a first disk body 21 and a second disk body 22. The first disk body 21 is connected to the frame main body 1, and the second disk body 22 is rotatably connected to the side of the first disk body 21 away from the frame main body 1. The traveling wheel set 3 is fixedly connected to the second disk body 22, and the steering drive member 5 is connected to the second disk body 22. The second disk bodies 22 of multiple steering structures 2 are rotatably connected to the synchronizing rod 4. With such a setting, when one second disk body 22 rotates, it drives the synchronizing rod 4 to move, causing the other second disk bodies 22 to rotate together with the movement of the synchronizing rod 4, realizing that multiple second disk bodies 22 can rotate in the same direction and by the same angle simultaneously, so that multiple traveling wheel sets 3 can synchronously adjust the traveling direction. The structures of the first disk body 21 and the second disk body 22 are simple, and by connecting the first disk body 21 to the frame main body 1, the steering structure 2 can be installed on the frame main body 1 and can rotate relative to the frame main body 1.

[0066] Specifically, it can be selected that the centers of the first disk body 21 and the second disk body 22 are rotatably connected to each other through a rotating shaft, so that the second disk body 22 can rotate relative to the first disk body 21. The first disk body 21 can be connected to the frame main body 1 by bolts or rivets. Of course, it can also be selected that the first disk body 21 is connected to the frame main body 1 by welding. The traveling wheel set 3 can be connected to the side of the second disk body 22 away from the first disk body 21 by bolts or screws. When the second disk body 22 rotates relative to the first disk body 21, the rotating shaft extends along the height direction c of the frame main body 1. When the second disk body 22 rotates relative to the first disk body 21, the second disk body 22 drives the traveling wheel set 3 to rotate to adjust the traveling direction corresponding to the traveling wheel set 3.

[0067] For the above-mentioned second disk body 22, through holes can be selectively arranged on the edge, and bumps can be selectively arranged on the synchronizing rod 4. The bumps on the synchronizing rod 4 extend along the width direction b of the frame main body 1. The bumps on the synchronizing rod 4 and the through holes on the edge of the second disk body 22 are rotatably connected by bolts. Multiple bumps are arranged on the synchronizing rod 4, so that multiple second disk bodies 22 are rotatably connected to the multiple bumps one by one. Of course, it can also be selected that protrusions are arranged on the edge of the second disk body 22, through holes are arranged on the synchronizing rod 4, and the protrusions of the second disk body 22 and the through holes on the synchronizing rod 4 are rotatably connected by bolts.

[0068] Refer to Figure 1 、 Figure 2 and Figure 4As shown, in some embodiments, the steering drive member 5 includes a telescopic oil cylinder. The telescopic oil cylinder has a telescopic end that can extend and retract. The telescopic oil cylinder is rotatably connected to one side of the frame body 1 facing the traveling wheel set 3, and the telescopic end is rotatably connected to the second disc body 22. The telescopic end extends and retracts relative to the telescopic oil cylinder to drive the second disc body 22 to rotate relative to the first disc body 21. With such a setting, the structure of the telescopic oil cylinder is simple and the output power is stable, enabling the telescopic end of the telescopic oil cylinder to output a stable acting force when extending and retracting, so that the second disc body 22 rotates relative to the first disc body 21, and improving the stability when the second disc body 22 rotates relative to the first disc body 21.

[0069] Specifically, the steering drive member 5 can be selected to include a telescopic oil cylinder. The telescopic oil cylinder can be selected as a hydraulic cylinder. The telescopic end is movably connected to the telescopic oil cylinder, so that the liquid in the telescopic oil cylinder applies a driving force to the telescopic end, enabling the telescopic end to extend and retract on the telescopic oil cylinder. It can be selected that the telescopic end is arranged on the frame body 1 in a direction parallel to the ground, and the line between the connection point of the telescopic end and the second disc body 22 and the center of the second disc body 22 connected to the telescopic end is used as a reference line. The extending and retracting direction of the telescopic end has an included angle with the reference line in the direction parallel to the ground at the rotation connection point, that is, the acting force applied by the telescopic end when extending and retracting has a component force in the circumferential direction of the second disc body 22, enabling the telescopic end to drive the second disc body 22 to rotate when extending and retracting.

[0070] Refer to Figure 1 、 Figure 2 As shown, in some embodiments, a connecting portion 221 is provided at the edge of the second disc body 22. The synchronizing rod 4 extends along the length direction of the frame body 1, and the connecting portion 221 extends radially toward the synchronizing rod 4 along the second disc body 22. The connecting portions 221 of multiple second disc bodies 22 are all rotatably connected to the synchronizing rod 4. With such a setting, the connecting portion 221 protrudes from the second disc body 22. After the synchronizing rod 4 is rotatably connected to the connecting portion 221, there can be a certain distance between the synchronizing rod 4 and the second disc body 22, avoiding the distance between the synchronizing rod 4 and the second disc body 22 being too close and easily interfering with the traveling wheel set 3 connected to the second disc body 22.

[0071] Specifically, the connecting portion 221 can be selected as a convex structure at the edge of the second disc body 22. The connecting portion 221 extends radially away from the center of the second disc body 22 along the second disc body 22, and the connecting portion 221 extends toward the synchronizing rod 4. After the synchronizing rod 4 is rotatably connected to the connecting portion 221, there can be a certain distance between the synchronizing rod 4 and the second disc body 22, thereby avoiding the distance between the synchronizing rod 4 and the second disc body 22 being too close and interfering with the traveling wheel set 3 connected to the second disc body 22.

[0072] One end of the above-mentioned connecting part 221 away from the second disc body 22 can be optionally provided with a through hole. A through hole is provided on the synchronizing rod 4. A bolt or a pin is used to pass through the through hole on the connecting part 221 and the through hole on the synchronizing rod 4, so that the synchronizing rod 4 is rotatably connected to the connecting part 221. The synchronizing rod 4 is provided with through holes having the same number as the number of the steering structures 2, so that the through holes of the plurality of connecting parts 221 are rotatably connected to the plurality of through holes of the synchronizing rod 4 in one-to-one correspondence.

[0073] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the number of the traveling wheel sets 3 and the steering structures 2 are both two. The two steering structures 2 are arranged at the two side edges of the frame body 1 along the length direction of the frame body 1. The two traveling wheel sets 3 are fixedly connected to the two steering structures 2, and the two steering structures 2 are both rotatably connected to the synchronizing rod 4. With such an arrangement, a relatively long distance is provided between the two traveling wheel sets 3, so that the center of gravity of the frame body 1 is between the two traveling wheel sets 3, the forces on the two traveling wheel sets 3 are balanced, and the two traveling wheel sets 3 can stably support the frame body 1 on the ground.

[0074] Specifically, it can be selected that the two steering structures 2 are arranged at the two side edges of one side of the frame body 1 away from the main beam 6 along the length direction a of the frame body 1, so that there is enough distance between the two traveling wheel sets 3 and the center of the frame body 1 is between the two traveling wheel sets 3.

[0075] Referring to Figure 1 and Figure 3 As shown, in some embodiments, the rear support leg further includes a rotating part 11 and a flipping driving part 12. The rotating part 11 is arranged on one side of the frame body 1 close to the main beam 6. The rotating part 11 is rotatably connected to the main beam 6. The flipping driving part 12 is connected between the main beam 6 and the frame body 1 to drive the frame body 1 to rotate between a working position perpendicular to the main beam 6 and a flipping position attached to one side of the main beam 6.

[0076] Specifically, it can be selected that the rotating part 11 includes a first hinge seat and a second hinge seat. The first hinge seat is connected to the frame body 1, and the second hinge seat is connected to the main beam 6. The first hinge seat and the second hinge seat are rotatably connected through a rotating shaft arranged transversely along the main beam 6. It can be selected that both the first hinge seat and the second hinge seat are block structures. The first hinge seat can be selected to be welded to the frame body 1, and the second hinge seat is welded to the main beam 6. Of course, it can also be selected that the first hinge seat and the frame body 1 are of an integral structure, and the second hinge seat and the main beam 6 are of an integral structure.

[0077] Of course, it can also be selected that the rotating part 11 is a convex block arranged on the frame body 1. A through hole arranged transversely along the main beam 6 is provided on the main beam 6. The rotating part 11 is rotatably connected to the through hole on the main beam 6 through a bolt or a pin.

[0078] The above-mentioned flipping driving member 12 can be selected as a hydraulic cylinder driven by hydraulic pressure. The hydraulic cylinder has a telescopic end, and the telescopic end can extend and retract along one direction in the hydraulic cylinder under the hydraulic drive; the hydraulic cylinder of the flipping driving member 12 can be rotatably connected to the main beam 6 by means of hinged or bolted connections, and the telescopic end is connected to the frame body 1 by means of hinged or bolted connections. The telescopic end is arranged longitudinally along the main beam 6, so that the acting force exerted on the frame body 1 when the telescopic end extends and retracts relative to the hydraulic cylinder can push the frame body 1 to rotate between the working position and the flipping position.

[0079] When the above-mentioned frame body 1 rotates relative to the main beam 6, the rotation axis can be selected to be in the same transverse direction as the main beam 6. Thus, when the frame body 1 is perpendicular to the main beam 6, the frame body 1 and the traveling wheel sets 3 can support the main beam 6 on the ground; when the frame body 1 rotates from the working position towards the flipping position, the end of the frame body 1 away from the main beam 6 moves longitudinally along the main beam 6, so that the frame body 1 rotates around the rotation connection point between the frame body 1 and the main beam 6. When the frame body 1 rotates to the position where it fits against the side of the main beam 6 facing the ground or the bridge deck, it is the frame body 1 rotating to the flipping position. Usually, a trailer for hanging beam slabs is provided in the middle of the main beam 6, and the vehicle for transporting beam slabs can move under the frame body 1 in the flipping position to the middle of the main beam 6, so that the beam slabs can be installed on the trailer.

[0080] Refer to Figures 1 to 7 As shown, the embodiment of the present disclosure also provides a bridge erecting machine, including a main beam 6 and the rear leg as described in any one of the above; one side of the frame body 1 away from the plurality of steering structures 2 is connected to the main beam 6, and the width direction of the frame body 1 is in the same transverse direction as the main beam 6.

[0081] Specifically, the main beam 6 is a beam structure parallel to the ground, and the frame body 1 is connected to the side of the main beam 6 facing the ground, so that the frame body 1 and the plurality of traveling wheel sets 3 support the main beam 6 on the ground; the main beam 6 has a front end and a rear end, and legs are provided at both the front end and the rear end of the main beam 6. The main beam 6 is supported on the ground or the pier by the legs at the front end and the rear end. The leg at the front end of the main beam 6 serves as the front leg of the main beam 6 to support the front end of the main beam 6, and the leg formed by the frame body 1, the synchronous rod 4, the steering driving member 5, the plurality of traveling wheel sets 3 and the plurality of steering structures 2 is arranged at the rear end of the main beam 6 and serves as the rear leg.

[0082] With such a setting, multiple steering structures 2 on the frame body 1 drive multiple running wheel sets 3 to turn synchronously to adjust the traveling direction of the frame body 1, so that the orientation of the main beam 6 changes as the frame body 1 moves in different directions. When the bridge erecting machine passes through a curved section, when the frame body 1 moves on the curved section, the traveling directions of the multiple running wheel sets 3 are instantaneously adjusted through the steering structures 2, so that the frame body 1 moves on the center line of the curved section, avoiding position deviation after the bridge erecting machine passes through the curved section.

[0083] When the rear outrigger and the bridge erecting machine provided by the present disclosure are specifically used, when the bridge erecting machine moves, the frame body 1 is in the working position, and multiple running wheel sets 3 support the frame body 1 and the main beam 6 on the ground. The traveling direction of the running wheel sets 3 is consistent with the longitudinal direction of the main beam 6, enabling the running wheel sets 3 to travel in a straight line.

[0084] When the traveling route of the bridge erecting machine includes a curved section and a straight section connected to each other, the rear outrigger at the rear end of the main beam 6 travels on the curved section, and the steering drive member 5 drives the second disc body 22 of a steering structure 2 to rotate relative to the frame body 1. Multiple second disc bodies 22 rotate in the same direction by the same angle through the synchronizing rod 4, thereby changing the traveling directions of multiple wheel bodies 31 on the frame body 1, enabling the frame body 1 to move on the center line of the curved section through the running wheel sets 3. After the frame body 1 passes through the curved section, the main beam 6 is located on the center line of the subsequent straight section of the curved section, facilitating the subsequent hole passing and erection operation of the bridge erecting machine.

[0085] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0086] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rear outrigger for being mounted on the main beam (6) of a bridge erecting machine, characterized in that, It includes a frame body (1), a synchronizing rod (4), a steering drive (5), a plurality of running wheel sets (3) and a plurality of steering structures (2); Along the height direction of the frame body (1), one side of the frame body (1) is connected to the main beam (6), and on the other side, a plurality of the steering structures (2) are arranged at intervals along the length direction of the frame body (1). Each of the steering structures (2) is rotatably connected to the frame body (1), and the plurality of running wheel sets (3) are respectively connected to the plurality of steering structures (2); The steering drive (5) is arranged on the frame body (1) and is connected to any one of the steering structures (2). The synchronizing rod (4) is arranged on one side of the plurality of steering structures (2) along the width direction of the frame body (1) and extends along the length direction of the frame body (1); The plurality of steering structures (2) are interconnected by the synchronizing rod (4) so that the steering drive (5) drives the plurality of steering structures (2) to rotate in the same direction by the same angle.

2. The rear leg according to claim 1, characterized in that, The running wheel set (3) includes a wheel body (31), a fixed arm (32), a telescopic arm (34) and a connecting arm (33); One end of the fixed arm (32) is connected to the steering structure (2), and the other end is rotatably connected to the connecting arm (33). One end of the telescopic arm (34) is rotatably connected to the fixed arm (32), and the other end is rotatably connected to the end of the connecting arm (33) away from the fixed arm (32). The telescopic arm (34) expands and contracts relative to the fixed arm (32) to drive the connecting arm (33) to rotate relative to the fixed arm (32), and the wheel body (31) is rotatably connected to the connecting arm (33) and rotates synchronously with the fixed arm (32).

3. The rear leg according to claim 2, characterized in that, The running wheel set (3) further includes a motor. The motor is arranged on the fixed arm (32), and the output end of the motor is connected to the wheel body (31) so that the motor drives the wheel body (31) to rotate.

4. The rear outrigger according to claim 2, wherein The wheel body (31) includes a wheel axle (312) and two tires (311). The middle of the wheel axle (312) is rotatably connected to the connecting arm (33), and both ends of the wheel axle (312) are respectively connected to the two tires (311).

5. The rear outrigger according to claim 1, characterized in that, The number of both the steering structures (2) and the running wheel sets (3) is two; On one side of the frame body (1) close to the running wheel set (3), there are two first mounting parts (13) and two second mounting parts (14). The two first mounting parts (13) are arranged at intervals transversely along the main beam (6). The two second mounting parts (14) are both arranged between the two first mounting parts (13) and are arranged at intervals transversely along the main beam (6). The two first mounting parts (13) are symmetrically arranged about the midpoint of the frame body (1) transversely along the main beam (6), and the two second mounting parts (14) are symmetrically arranged about the midpoint of the frame body (1) transversely along the main beam (6); The two steering structures (2) are respectively connected to the two first mounting parts (13), so that the two traveling wheel sets (3) are respectively mounted on the two first mounting parts (13), or the two steering structures (2) are respectively connected to the two second mounting parts (14), so that the two traveling wheel sets (3) are respectively mounted on the two second mounting parts (14).

6. The rear outrigger according to claim 1, characterized in that, The steering structure (2) includes a first disk body (21) and a second disk body (22). The first disk body (21) is connected to the frame main body (1). The second disk body (22) is rotatably connected to a side of the first disk body (21) away from the frame main body (1). The traveling wheel set (3) is fixedly connected to the second disk body (22). The steering drive member (5) is connected to the second disk body (22). The second disk bodies (22) of the plurality of steering structures (2) are rotatably connected to the synchronizing rod (4).

7. The rear outrigger according to claim 6, wherein The steering drive member (5) includes a telescopic oil cylinder. The telescopic oil cylinder has a telescopic end that can extend and retract. The telescopic oil cylinder is rotatably connected to a side of the frame main body (1) facing the traveling wheel set (3). The telescopic end is rotatably connected to the second disk body (22). The telescopic end extends and retracts relative to the telescopic oil cylinder to drive the second disk body (22) to rotate relative to the first disk body (21).

8. The rear outrigger according to claim 6, characterized in that, A connecting portion (221) is provided at the edge of the second disk body (22). The synchronizing rod (4) extends along the length direction of the frame main body (1). The connecting portion (221) extends radially toward the synchronizing rod (4) along the second disk body (22). The connecting portions (221) of the plurality of second disk bodies (22) are all rotatably connected to the synchronizing rod (4).

9. The rear outrigger according to any one of claims 1 to 4, characterized in that, The rear leg further includes a rotating portion (11) and a flipping drive member (12). The rotating portion (11) is provided on a side of the frame main body (1) close to the main beam (6). The rotating portion (11) is rotatably connected to the main beam (6). The flipping drive member (12) is connected between the main beam (6) and the frame main body (1) to drive the frame main body (1) to rotate between a working position perpendicular to the main beam (6) and a flipping position attached to one side of the main beam (6).

10. A bridge erecting machine, characterized in that, It includes a main beam (6) and a rear leg according to any one of claims 1 to 9; A side of the frame main body (1) away from the plurality of steering structures (2) is connected to the main beam (6). The width direction of the frame main body (1) is the same as the transverse direction of the main beam (6).

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