Moving flat car of truck crane

Abstract

The invention relates to a construction bearing moving platform, in particular to a truck crane moving flatcar which comprises a moving flatcar body and a rail, a plurality of sliding support modules are arranged at the bottom of the moving flatcar body, the cross section of the rail is in a groove shape with an upward opening, and the sliding support modules are located in the rail. A pushing device capable of pushing the movable flatcar body to move along the rail is further arranged in the rail. The invention provides an innovative truck-mounted crane moving form, compared with a traditional mode, the walking platform does not need to be laid along the lattice type steel beam all the time, consumption of construction materials and labor cost are reduced, and therefore the overall construction cost is reduced. The overturning risk of the truck crane in the hoisting process is effectively prevented through the wide width design of the movable flat car body and a lock sleeve locking mechanism, the construction safety is greatly improved, and the life and property safety of constructors is guaranteed.

Description

Technical Field

[0001] The invention relates to a construction bearing mobile platform, in particular to a mobile flat car for a truck crane. Background Art

[0002] During the construction of the superstructure of a bridge project, it is often necessary to use a truck crane for lifting operations, especially when it comes to lifting the arch ribs in sections to meet the "slant-stayed and buckled" lifting system. However, the traditional ground crane operation method is greatly restricted when facing complex environmental factors such as high bridge heights or water flows under the bridge. Therefore, the current mainstream practice is to use a crane on the bridge deck for construction.

[0003] In order to adapt to this construction method, the mobile crane needs to move and operate on the lattice steel beams of the bridge. This operation method brings two major challenges: First, in order to ensure that the mobile crane can move smoothly on the steel beams, a long walking platform needs to be laid along the lattice steel beams of the bridge. This not only consumes a lot of construction time and manpower and equipment resources, but also increases construction costs; the other is the safety issue of the mobile crane moving and hoisting on the bridge. There are safety hazards and safety risks during the operation process, which pose a threat to the safety of construction workers.

[0004] Therefore, the design of the mobile flat car for the truck crane can solve the problem that when the truck crane lifting technology is required in the construction of the superstructure of the project, it can ensure the convenience of the movement of the truck crane and the safety of the construction, improve the quality and efficiency of the superstructure construction, enhance the degree of automation of the project, and facilitate the construction of a smart construction site. Summary of the invention

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is: to provide a mobile flat car for a truck crane, which only needs to lay tracks along the lattice steel beams, and there is no need to lay a walking platform all the way. This mobile flat car not only meets the walking and hoisting needs of the truck crane on the lattice steel beams, but also greatly improves the work efficiency. At the same time, its hydraulic walking mode and safety locking mode have the advantages of simple operation, convenient adjustment and control, safety and stability, and easy automation, providing a high-efficiency and highly automated operation mode for the upper structure hoisting operation.

[0006] The mobile flat car of the automobile crane described in the present invention comprises a mobile flat car body and a track laid along the length direction of the lattice steel beam, the number of the tracks is at least two, a plurality of sliding support modules are arranged at the bottom of the mobile flat car body, the cross section of the track is a groove-shaped track with an opening facing upward, the sliding support module is located in the track, and a plurality of slots are hollowed out and opened on the walls on both sides of the track along the length direction thereof; a pushing device which can push the mobile flat car body to move along the track is also arranged in the track, the pushing device comprises a transverse push hydraulic cylinder and a transverse support module, one end of the transverse push hydraulic cylinder is connected to the transverse support module, and the other end is connected to the mobile flat car body or the sliding support module; retractable and pop-up blocks are arranged on both sides of the transverse support module, and the blocks can be stuck in the slots on both sides of the track after being popped out; when the transverse push hydraulic cylinder extends to push the mobile flat car body to move, the blocks pop out and are stuck in the slots, and when the transverse push hydraulic cylinder retracts, the blocks retract into the transverse support module.

[0007] The main body of the mobile flat car of the present invention is supported by a plurality of sliding support modules, and the sliding support modules can slide in the track. The slots on both sides of the track are used to cooperate with the transverse support module to provide staged walking support. The main body of the mobile flat car adopts a hydraulic walking mode, and the hydraulic walking driving force comes from the transverse push hydraulic cylinder. The two ends of the transverse push hydraulic cylinder are respectively connected to the sliding support module and the transverse support module. When the transverse push hydraulic cylinder extends to push the main body of the mobile flat car forward, the transverse support module is fixed, and the blocks on both sides of the transverse support module are in a pop-up state and are stuck in the slots on both sides of the track to provide walking support, and the action force and reaction force are used to push the main body of the mobile flat car forward for a distance; when the transverse push hydraulic cylinder retracts, due to the large weight of the main body of the mobile flat car, it is fixed, and the transverse push hydraulic cylinder pulls the transverse support module forward for a distance. At this time, the blocks on both sides of the transverse support module are retracted into the transverse support module to prevent interference from affecting the advancement of the transverse support module. The main body of the mobile flat car is constantly "creeping" and moving forward steadily during the extension and retraction of the transverse push hydraulic cylinder. During this process, the legs on both sides of the truck crane are always supported on the main body of the mobile flat car, which is safe and reliable, eliminating the safety hazards caused by the instability of the vehicle walking on the lattice beam, and there is no need to lay a walking platform along the lattice beam, reducing the investment in construction, manpower and materials.

[0008] Among them, one end of the stopper is rotatably connected to the transverse support module through a rotating shaft, and the stopper is equipped with a reset member that can make it rotate and pop out to both sides. The transverse support module has a rotation limit function for the stopper, and the stopper can only rotate between the retracted state and the pop-up state. When the transverse support module moves to the slots on both sides of the track, the stopper automatically pops out under the action of the reset member and is stuck in the slot; when the transverse push hydraulic cylinder retracts and pulls the transverse support module forward, the two side walls of the track will force the stopper to rotate and retract into the transverse support module.

[0009] Preferably, the reset element is a torsion spring.

[0010] In addition, the lateral support module is provided with an electromagnet that can absorb the stopper to prevent it from rotating and popping out, so as to meet the need of reverse movement (reverse) of the mobile flat car body.

[0011] Furthermore, the pushing device is symmetrically arranged in front and back and left and right of the main body of the mobile flat car. The pushing device at the rear end can push the main body of the mobile flat car forward, and the pushing device at the front end can push the main body of the mobile flat car backward. When moving forward, the pushing device at the front end that provides the backward function is energized, and the electromagnet contained in it is attracted to prevent the block inside from popping out, so as to avoid affecting the forward movement. The opposite is true when moving backward.

[0012] The main body of the mobile flat car described in the present invention comprises a car crane parking platform in the middle and leg support platforms on both sides. The leg support platforms are provided with locking sleeves sleeved and connected thereto, and the locking sleeves are equipped with locking sleeve hydraulic cylinders which can enable the locking sleeves to move along the leg support platforms. A gap which can accommodate the legs of the car crane is provided between the inner top surface of the locking sleeve and the top surface of the leg support platform. After the locking sleeves are moved, the legs of the car crane can be sleeved and locked together with the leg support platform. Since the main body of the mobile flat car has a large area and a wide width, after being locked with the car crane, it can prevent the car crane from overturning during lifting and causing serious construction accidents, thereby greatly enhancing construction safety.

[0013] Furthermore, a wide gap is provided on the top of the lock sleeve, a lock plate that can slide left and right is provided below the wide gap, and an angular bayonet is provided on the lock plate. The lock plate that can slide left and right can improve the adaptability to the vehicle crane legs, and prevent the bayonet from being misaligned with the legs after the vehicle crane is parked; and as the lock sleeve moves toward the vehicle crane legs, the bayonet can automatically find and be stuck at the legs.

[0014] Specifically, pins that can extend into the lock sleeve are provided on both sides of the lock sleeve, and correspondingly, holes are provided on both sides of the lock plate, and the pins are inserted into the holes so that the lock plate can slide left and right; a centering spring is provided on the pin, and the lock plate can be automatically centered after the lock sleeve retracts and resets.

[0015] The sliding support module of the present invention comprises an upper fixed seat and a lower sliding seat, which are rotatably connected via a hinge shaft in the middle. Since the lattice steel beam is not an ideal plane, the lower sliding seat can automatically and slightly adjust the angle with the change of the supporting surface to enhance the bearing capacity.

[0016] Preferably, an MGE slide plate is embedded in the bottom surface of the slide seat to reduce sliding friction.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Reduced construction costs: The present invention proposes an innovative mobile form of the truck crane. Compared with the traditional method, there is no need to lay a walking platform along the lattice steel beam, which reduces the consumption of construction materials and labor costs, thereby reducing the overall construction cost.

[0018] 2. Enhanced construction safety: The wide design of the mobile flat car body and the locking mechanism of the lock sleeve effectively prevent the risk of overturning of the mobile crane during the lifting process, greatly enhancing the construction safety and ensuring the safety of life and property of construction workers.

[0019] 3. Improved construction efficiency: By adopting hydraulic walking mode and safety locking mode, the mobile flat car of the truck crane can move stably and efficiently along the lattice steel beam, greatly shortening the construction period and improving the overall construction efficiency.

[0020] 4. Improved construction accuracy: Through precise hydraulic control, the truck crane can locate the lifting position more accurately, improving construction accuracy and project quality.

[0021] 5. A new type of lattice steel beam operation and hoisting supporting construction technology has been formed, which solves the problem of hoisting the steel beam superstructure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is one of the overall structural schematic diagrams of the present invention; Figure 2 This is the second schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the structure in which the main body of the mobile flat car and the track are located on the lattice steel beam; Figure 4 It is a structural schematic diagram of the main body of the mobile flat car; Figure 5 It is a schematic diagram of the structure in which the main body of the mobile flat car is located on the track; Figure 6 yes Figure 5 A partial enlarged view of the middle A area; Figure 7 yes Figure 5 A partial enlarged view of the B area; Figure 8 It is the steel structure drawing of the main body of the mobile flat car; Fig. 9 It is a structural schematic diagram of the truck crane located on the main body of the mobile flat car; Fig.10 yes Fig. 9 A partial enlarged view of the middle C area; Fig.11 It is a schematic diagram of the overall structure of the lateral support module; Fig.12 It is a schematic diagram of the exploded structure of the lateral support module (the stopper pops out); Fig.13 It is a schematic diagram of the exploded structure of the lateral support module (the stopper is retracted); Fig.14 It is one of the structural diagrams of the lock sleeve; Fig.15 This is the second structural diagram of the lock sleeve; Fig.16 2. It is a schematic diagram of the lock plate structure; Fig.17 It is one of the structural diagrams of the sliding support module; Fig.18 This is the second structural diagram of the sliding support module.

[0023] In the figure: 1. Mobile flat car body; 2. Track; 3. Lattice steel beam; 4. Truck crane; 5. Truck crane parking platform; 6. Outrigger support platform; 7. Sliding support module; 8. Horizontal push hydraulic cylinder; 9. Horizontal support module; 10. Lock sleeve; 11. Lock sleeve hydraulic cylinder; 12. Slot; 13. Block; 14. Steel plate; 15. Horizontal support steel for parking platform; 16. Vertical support steel for parking platform; 17. Horizontal support steel for main body 1. Steel material for horizontal support of supporting platform; 2. Steel material for longitudinal support of supporting platform; 3. Support leg of automobile crane; 4. Support pulley; 5. Rotating shaft; 6. Torsion spring; 7. Electromagnet; 8. Wide gap; 9. Lock plate; 10. Pin; 11. Centering spring; 12. Hole; 13. Bayonet; 14. Fixed seat; 15. Sliding seat; 16. Articulated shaft; 17. MGE slide plate; 18. Support platform horizontal support steel; 19. Support platform longitudinal support steel; 20. Automobile crane support leg; 21. Support pulley; 22. Rotating shaft; 23. Torsion spring; 24. Electromagnet; 25. Wide gap; 26. Lock plate; 27. Pin shaft; 28. Centering spring; 29. ​​Hole; 30. Bayonet; 31. Fixed seat; 32. Sliding seat; 33. Articulated shaft; 34. MGE slide plate; 35. Hydraulic station; 36. Parking limiter. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific embodiments.

[0025] However, the description of the present invention is merely an embodiment of structural and even functional description, and the scope of rights of the present invention is not limited by the embodiments described in the text.

[0026] For example, multiple embodiments may have various modifications and various forms, and it should be understood that the scope of rights of the present invention includes equivalents that can implement the technical concept.

[0027] like Figures 1 to 18As shown, the present embodiment is implemented by the following technical scheme: it includes a mobile flat car body 1 and four tracks 2 laid along the length direction of the lattice steel beam 3, a plurality of sliding support modules 7 are arranged at the bottom of the mobile flat car body 1, the cross section of the track 2 is a groove type with an opening facing upward, the sliding support module 7 is located in the track 2, and a plurality of slots 12 are hollowed out on the walls on both sides of the track 2 along its length direction; a pushing device that can push the mobile flat car body 1 to move along the track 2 is also arranged in the track 2, the pushing device includes a lateral push hydraulic cylinder 8 and a lateral support module 9, one end of the lateral push hydraulic cylinder 8 is connected to the lateral support module 9, and the other end is connected to the mobile flat car body 1 or the sliding support module 7; retractable and pop-up stoppers 13 are arranged on both sides of the lateral support module 9, and the stoppers 13 can be snapped into the slots 12 on both sides of the track 2 after being popped out; when the lateral push hydraulic cylinder 8 extends to push the mobile flat car body 1 to move, the stoppers 13 pop out and snap into the slots 12, and when the lateral push hydraulic cylinder 8 retracts, the stoppers 13 retract into the lateral support module 9.

[0028] The mobile flat car body 1 of the present invention is supported by a plurality of sliding support modules 7, and the sliding support modules 7 can slide in the track 2. The slots 12 on both sides of the track 2 are used to cooperate with the transverse support module 9 to provide staged walking support. The mobile flat car body 1 adopts a hydraulic walking mode, and the hydraulic walking driving force comes from the transverse push hydraulic cylinder 8. The two ends of the transverse push hydraulic cylinder 8 are respectively connected to the sliding support module 7 and the transverse support module 9. When the transverse push hydraulic cylinder 8 extends to push the mobile flat car body 1 forward, the transverse support module 9 is fixed, and the block 13 on both sides of the transverse support module 9 is in a pop-up state and is stuck in the slots 12 on both sides of the track 2 to provide walking support, and the action force and reaction force are used to push the mobile flat car body 1 forward for a distance; when the transverse push hydraulic cylinder 8 retracts, due to the large weight of the mobile flat car body 1, it is fixed, and the transverse push hydraulic cylinder 8 pulls the transverse support module 9 forward for a distance. At this time, the block 13 on both sides of the transverse support module 9 is retracted into the transverse support module 9 to prevent interference from affecting the advancement of the transverse support module 9. The mobile flat car body 1 is constantly "creeping" and moving forward steadily during the extension and contraction of the lateral push hydraulic cylinder 8. In this process, the legs on both sides of the vehicle crane 4 are always supported on the mobile flat car body, which is safe and reliable, eliminating the safety hazards caused by the instability of the vehicle walking on the lattice beam, and there is no need to lay a walking platform along the lattice beam, reducing the investment in construction, manpower and materials.

[0029] Among them, one end of the stopper 13 is rotatably connected to the transverse support module 9 through a rotating shaft 22. The stopper 13 is equipped with a torsion spring 23 that can make it rotate and pop out to both sides. The transverse support module 9 has a rotation limit function for the stopper 13, and the stopper 13 can only rotate between the retracted state and the pop-up state. When the transverse support module 9 moves to the slots 12 on both sides of the track 2, the stopper 13 automatically pops out under the action of the torsion spring 23 and is stuck in the slot 12; when the transverse push hydraulic cylinder 8 retracts and pulls the transverse support module 9 forward, the two side walls of the track 2 will force the stopper 13 to rotate and retract into the transverse support module 9.

[0030] In addition, an electromagnet 24 is provided in the lateral support module 9 to absorb the stopper 13 to prevent it from rotating and popping out. The pushing device is arranged symmetrically in front and back and left and right of the mobile flat car body 1. The pushing device at the rear end can push the mobile flat car body 1 forward, and the pushing device at the front end can push the mobile flat car body 1 backward. When moving forward, the pushing device at the front end that provides the backward function is energized, and the electromagnet contained in it is energized to absorb the stopper 13 inside to prevent it from popping out, so as to avoid affecting the forward movement. The opposite is true when moving backward.

[0031] The mobile flat car body 1 of the present invention includes a car crane parking platform 5 located in the middle and leg support platforms 6 located on both sides. Figure 8 As shown, the parking platform 5 of the automobile crane is composed of 1 cm thick steel plate 14, densely distributed parking platform transverse support steel 15 (I16 I-beam), and spaced parking platform longitudinal support steel 16 (HN400*200 steel) from top to bottom; the leg support platform 6 is composed of densely distributed support platform transverse support steel 18 (I16 I-beam), and spaced support platform longitudinal support steel 19 (HN400*200 steel) from top to bottom. The parking platform 5 of the automobile crane and the leg support platform 6 are jointly arranged on the main body transverse support steel 17 (double-limb HN400*200 steel). The top surface of the leg support platform 6 is not provided with a steel plate layer to increase the friction between it and the automobile crane support foot 20.

[0032] The leg support platform 6 is provided with a locking sleeve 10 which is sleeved and connected thereto. The locking sleeve 10 is slidably supported on the longitudinal support steel 19 of the support platform through the support pulley 21 inside the locking sleeve 10. The locking sleeve 10 is provided with a locking sleeve hydraulic cylinder 11 which can make it move along the leg support platform 6. A gap which can accommodate the automobile crane support foot 20 is provided between the inner top surface of the locking sleeve 10 and the top surface of the leg support platform 6. After the locking sleeve 10 is moved, the automobile crane support foot 20 can be sleeved with the leg support platform 6. Since the mobile flat car body 1 has a large area and a wide width, after locking it with the automobile crane support foot 20, it can prevent the automobile crane 4 from overturning during the lifting and causing serious construction accidents, thereby greatly enhancing the construction safety. A wide notch 25 is provided at the top of the locking sleeve 10, and a lock plate 26 which can slide left and right is provided below the wide notch 25. An angular bayonet 30 is provided on the lock plate 26. The lock plate 26 that can slide left and right can improve the adaptability to the vehicle crane legs. After the vehicle crane 4 is parked, the bayonet 30 is prevented from being misaligned with the legs. As the lock sleeve 10 moves toward the vehicle crane legs, the bayonet 30 can automatically find and get stuck at the legs. Specifically, the lock sleeve 10 is provided with pins 27 that can be inserted into the lock sleeve 10 on both sides. Correspondingly, the lock plate 26 is provided with holes 29 on both sides. The pins 27 are inserted into the holes 29 so that the lock plate 26 can slide left and right. The pins 27 are provided with a centering spring 28. After the lock sleeve is retracted and reset, the lock plate can be automatically centered.

[0033] The sliding support module 7 includes an upper fixed seat 31 and a lower sliding seat 32, which are rotatably connected via a central hinge shaft 33. Since the lattice steel beam 3 is not an ideal plane, the lower sliding seat 32 can automatically and slightly adjust the angle as the supporting surface changes to enhance the bearing capacity. An MGE slide plate 34 is embedded in the bottom surface of the sliding seat 32 to reduce sliding friction.

[0034] The parking platform 5 for the truck crane is provided with a hydraulic station 35 for driving the overall hydraulic system and a parking limiter 36 for limiting the position of the truck crane.

[0035] Application examples: The main bridge of the Yellow River Bridge is a bottom-supported steel tube concrete tied arch bridge with a span of 190+260+260+190m. It adopts a structure of arch pier consolidation and arch-beam separation. 190m span: The theoretical calculated span of the arch rib is 184m, the calculated rise is 40.89m, and the rise-span ratio is 1 / 4.5. The radial height of the arch rib section is 5.0m, and the rib width is 2.8m. The arch rib is divided into 19 segments, with a maximum weight of 127.252t and a minimum weight of 26.796t. 260m span: The theoretical calculated span of the arch rib is 254m, the calculated rise is 56.44m, and the rise-span ratio is 1 / 4.5. The radial height of the arch rib section is 6.0m, and the rib width is 2.8m. The arch rib is divided into 27 segments, with a maximum weight of 148.184t and a minimum weight of 28.932t. The arch rib hoisting adopts the "oblique pull and buckle hanging" construction technology. In order to meet the reasonable position of the automobile crane for hoisting the arch rib segment and speed up the hoisting progress and construction quality, a automobile crane mobile flat car is designed for hoisting operations.

[0036] The mobile flat car for automobile crane is designed according to the lattice steel beam structure and the size parameters of automobile crane. The main body 1 of this mobile flat car is 19m long, 16m wide and 1.48m high. After the automobile crane is driven to the automobile crane parking platform 5, the crane legs are always supported on the leg support platform 6. The mobile flat car uses hydraulic walking on the track to carry the crane forward and backward. This mobile flat car solves the walking and hoisting needs of automobile crane on the lattice steel beam, greatly improving the work efficiency. Its hydraulic walking mode has the advantages of simple operation, convenient adjustment and control, and easy automation.

[0037] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and equal changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention should all fall within the scope of the patent coverage of the present invention.

Claims

1. A mobile flat car for a truck crane, characterized in that: The invention comprises a mobile flat car body (1) and a track (2) laid along the length direction of a lattice steel beam (3), a plurality of sliding support modules (7) are arranged at the bottom of the mobile flat car body (1), the cross section of the track (2) is a groove-shaped track with an opening facing upward, the sliding support module (7) is located inside the track (2), and a plurality of slots (12) are hollowed out and opened on the walls on both sides of the track (2) along the length direction thereof; A pushing device is also provided in the track (2) for pushing the main body of the mobile flat car (1) to move along the track (2), the pushing device comprising a lateral push hydraulic cylinder (8) and a lateral support module (9), one end of the lateral push hydraulic cylinder (8) is connected to the lateral support module (9), and the other end is connected to the main body of the mobile flat car (1) or the sliding support module (7); retractable and ejectable stoppers (13) are provided on both sides of the lateral support module (9), and the stoppers (13) can be inserted into the slots (12) on both sides of the track (2) after being ejected; When the lateral push hydraulic cylinder (8) extends to push the movable flat car body (1) to move, the stopper (13) pops out and snaps into the snap slot (12); when the lateral push hydraulic cylinder (8) retracts, the stopper (13) retracts into the lateral support module (9).

2. The mobile flat car for a truck crane according to claim 1, characterized in that: One end of the stopper (13) is rotatably connected to the transverse support module (9) via a rotating shaft (22); the stopper (13) is provided with a reset member that enables it to rotate to both sides and pop out; the transverse support module (9) has a rotation limiting function for the stopper (13); the stopper (13) can only rotate between a retracted state and a pop-out state.

3. The mobile flat car for a truck crane according to claim 2, characterized in that: The reset element is a torsion spring (23).

4. The mobile flat car for automobile crane according to claim 2, characterized in that: The lateral support module (9) is provided with an electromagnet (24) capable of absorbing the stopper (13) to prevent the stopper from rotating and popping out.

5. The mobile flat car for automobile crane according to claim 4, characterized in that: The pushing device is symmetrically arranged in front and behind and in left and right sides of the mobile flat car body (1); the pushing device at the rear end can push the mobile flat car body (1) forward, and the pushing device at the front end can push the mobile flat car body (1) backward.

6. The mobile flat car for automobile crane according to claim 1, characterized in that: The mobile flat car body (1) comprises a car crane parking platform (5) located in the middle and outrigger support platforms (6) located on both sides. The outrigger support platform (6) is provided with a locking sleeve (10) sleeved and connected thereto. The locking sleeve (10) is provided with a locking sleeve hydraulic cylinder (11) that enables it to move along the outrigger support platform (6). A gap that can accommodate the car crane support foot (20) is provided between the inner top surface of the locking sleeve (10) and the top surface of the outrigger support platform (6). After the locking sleeve (10) moves, the car crane support foot (20) and the outrigger support platform (6) can be sleeved together.

7. The mobile flat car for a truck crane according to claim 6, characterized in that: The lock sleeve (10) is provided with a wide notch (25) at the top, a lock plate (26) which can slide left and right is provided below the wide notch (25), and an angular bayonet (30) is provided on the lock plate (26).

8. The mobile flat car for automobile crane according to claim 7, characterized in that: The lock sleeve (10) is provided with pins (27) on both sides thereof which can extend into the lock sleeve (10). Correspondingly, the lock plate (26) is provided with holes (29) on both sides thereof. The pins (27) are inserted into the holes (29) so that the lock plate (26) can slide left and right. A centering spring (28) is provided on the pins (27).

9. The mobile flat car for automobile crane according to claim 1, characterized in that: The sliding support module (7) comprises an upper fixed seat (31) and a lower sliding seat (32), the two being rotatably connected via a hinge shaft (33) in the middle.

10. The mobile flat car for automobile crane according to claim 9, characterized in that: An MGE slide plate (34) is embedded in the bottom surface of the slide seat (32).

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