A lifting semi-trailer chassis and a lifting semi-trailer applying the same

Abstract

The application discloses a hoisting semitrailer chassis and a hoisting semitrailer applying the same, which comprises a frame, front auxiliary supporting legs, rear auxiliary supporting legs and a crane base fixed on the frame; a main supporting leg oil cylinder sleeve is arranged at each corner of the crane base, and hoisting force can be directly transmitted to the ground after connecting the main supporting leg oil cylinder, so that the front and rear auxiliary supporting legs can bear the hoisting torque generated by the hoisting distance with very small force, the shearing force and bending moment borne by the vehicle body during hoisting are greatly reduced, and vertical deformation is reduced; a fixed platform connecting seat is arranged at the bottom of the crane base, and a supporting leg supporting hoisting mode and a fixed platform supporting hoisting mode can be realized, wherein the maximum hoisting force can reach 300 tons in the supporting leg supporting hoisting mode, and the hoisting force can reach 500 tons in the fixed platform supporting hoisting mode; and when hoisting a super large piece, the hoisting task of a super long structural piece can be completed by combining multiple cranes in any form according to task requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting machinery, in particular to a hoisting semi-trailer chassis and a hoisting semi-trailer using the same. BACKGROUND

[0002] The truck-mounted hoisting semi-trailer is a new type of hoisting and transporting machinery, which has a broad application prospect in the engineering field. The truck-mounted hoisting semi-trailer has the dual functions of transportation and hoisting, and can replace the "ordinary truck + automobile crane". It is just because of the composite functions that the truck-mounted hoisting semi-trailer has been widely used in many fields such as electric power, railway station, agriculture, construction, metallurgy, wharf, oil exploitation and transportation.

[0003] However, the existing 500-ton crane generally adopts an eight-axle integral type axle, the outrigger is far away from the rotating disc of the crane, and the hoisting weight needs to be transmitted to the ground through the vehicle body, so that the vehicle body needs to bear very large shear force and bending moment, which will cause large vertical deformation. Some cranes use rotating outriggers with the rotating disc as the axis and the outriggers extending in the radial direction. The rotating disc is suspended below, and the vertical settlement amount during hoisting operation reaches 50-100mm, which is very unstable, and the vehicle frame is also very heavy. SUMMARY

[0004] In view of the defects of the prior art, the present application aims to provide a hoisting semi-trailer chassis with large hoisting force and hoisting torque, good vehicle passability and flexibility, and light weight, and a hoisting semi-trailer using the same.

[0005] In order to achieve the above-mentioned purpose, the present application provides a hoisting semi-trailer chassis, which comprises a vehicle frame, a front auxiliary outrigger located at the front end of the vehicle frame, a rear auxiliary outrigger located at the rear end of the vehicle frame, and a crane base fixed on the vehicle frame.

[0006] The vehicle frame comprises two longitudinal beams arranged opposite to each other and thirteen cross beams mounted between the two longitudinal beams. The crane base is fixed on the seventh, eighth cross beams and the two longitudinal beams. The front auxiliary outrigger is arranged at the third cross beam, and the rear auxiliary outrigger is arranged at the twelfth cross beam. The crane base is arranged in a quadrilateral structure, and one main outrigger oil cylinder sleeve is arranged at each corner of the quadrilateral structure.

[0007] Preferably, the crane base comprises an upper structure, an intermediate structure and a lower structure arranged in sequence from top to bottom. The upper structure comprises an upper connecting plate. A crane bottom ring composed of an outer ring hoop and an inner ring hoop is arranged at the middle position of the upper surface of the upper connecting plate. A protrusion flush with the upper surface of the main outrigger oil cylinder sleeve is arranged at each corner.

[0008] The intermediate layer structure comprises four vertical support plates connected head to tail to form a quadrilateral structure, and an outer ring support and an inner ring support are arranged in the vertical support plates respectively corresponding to the outer ring hoop and the inner ring hoop in the upper layer structure, and vertical rib plates are arranged between the vertical support plates, the outer ring support and the inner ring support;

[0009] The lower layer structure is composed of a seventh cross beam, an eighth cross beam and two longitudinal beams located between the seventh cross beam and the eighth cross beam, and an outer vertical plate is arranged on the outer side of the two longitudinal beams located here, and the seventh cross beam, the eighth cross beam and the two longitudinal beams located here are all arranged as box-shaped structures, and vertical reinforcing ribs are arranged between the box-shaped structures and the outer vertical plate and the two longitudinal beams.

[0010] Preferably, the bottom of the crane base is further provided with eight fixed platform connecting seats, which are arranged at the bottom of the seventh cross beam, the eighth cross beam and the left and right longitudinal beams between the seventh cross beam and the eighth cross beam, and two are arranged at each position, which are used to connect with the reserved interfaces on the fixed platform, and the fixed platform is used to realize the fixed platform supporting and hoisting mode.

[0011] Preferably, the fixed platform connecting seat comprises horizontally arranged upper and lower connecting plates, the upper connecting plate is fixedly connected to the vehicle frame, the lower connecting plate is fixedly connected below the upper connecting plate through a vertical connecting block, and a plurality of connecting holes are arranged on the lower connecting plate.

[0012] Preferably, a reinforcing plate is further arranged between the upper connecting plate and the vertical connecting block, and the reinforcing plate is tack-welded below the upper connecting plate.

[0013] Preferably, a plurality of vertical connecting blocks are arranged, which are evenly arranged along the two length edges of the reinforcing plate.

[0014] Preferably, a lift base is further arranged on the vehicle frame, and the lift base is arranged at the second cross beam of the right longitudinal beam and is used to install a lift, so that the staff can enter the lift during construction, and after being lifted, the staff can perform on-site command, maintenance and auxiliary installation operations.

[0015] Preferably, the front auxiliary supporting leg comprises a front fixed beam fixed to the top of the third cross beam of the vehicle frame and front movable supporting legs rotatably connected to the two ends of the front fixed beam, respectively, and a front vertical oil cylinder sleeve is arranged at the end of each front movable supporting leg away from the front fixed beam.

[0016] Preferably, a front horizontal oil cylinder connecting seat is arranged on the outer side of each front movable supporting leg and the two longitudinal beams at the fourth cross beam of the vehicle frame, respectively, for connecting a front horizontal oil cylinder, and the front horizontal oil cylinder is used to drive the folding and unfolding of the front movable supporting leg.

[0017] Preferably, the rear auxiliary support leg comprises a rear fixed beam fixed on the top of the twelfth cross beam of the frame and rear movable support legs rotatably connected at both ends of the rear fixed beam, and a rear vertical oil cylinder sleeve is arranged at the end of each rear movable support leg away from the rear fixed beam.

[0018] Preferably, the front side of the rear fixed beam is further provided with two inclined support plates, one end of each of the inclined support plates is fixed on the top of the two longitudinal beams, and the other end is fixed on the front side of the rear fixed beam; a rear support leg oil cylinder connecting seat is arranged on the front side of each of the rear movable support legs and the outer side of each of the two inclined support plates, for connecting a rear support leg oil cylinder, and the rear movable support leg is retracted or extended by the rear support leg oil cylinder.

[0019] Preferably, the front movable support leg and the rear support leg each comprise two vertical plates arranged in parallel and a plurality of sealing plates connected at the top and bottom of the two vertical plates, and the side of each of the vertical plates away from the frame is bent downward, and a first circular arc reinforcing plate is attached to the bent portion of each of the two vertical plates to reinforce the bent portion, reduce working stress and prolong service life.

[0020] Preferably, a stabilizing plate and an inclined plate are vertically arranged in each of the front movable support leg and the rear movable support leg, respectively, the stabilizing plate is arranged at the front horizontal oil cylinder connecting seat and the rear horizontal oil cylinder connecting seat, respectively, for reinforcing the vertical plate at the front horizontal oil cylinder connecting seat and the rear horizontal oil cylinder connecting seat to prevent the vertical plate from being deformed by being pulled and bent when the front horizontal oil cylinder operates, and the inclined plate is arranged at the bent portion of the vertical plate in an inclined manner, the top of the inclined plate is aligned with the upper bent portion of the vertical plate, and the bottom of the inclined plate is aligned with the lower bent portion of the vertical plate, for further reinforcing the bent portion.

[0021] Preferably, a straight pulling plate is arranged in the front movable support leg, the straight pulling plate is arranged horizontally between the two vertical plates, one end of the straight pulling plate is fixedly connected to the end of the front movable support leg close to the front fixed beam, and the other end of the straight pulling plate abuts against the sealing plate.

[0022] Preferably, the side of the vertical plate of the rear movable support leg close to the frame is also bent downward, and a second circular arc reinforcing plate is arranged at the bent portion.

[0023] Preferably, a lifting arm support is arranged on the top of the front fixed beam for placing a lifting arm.

[0024] Preferably, an anti-deformation through hole is arranged at the middle position of the seventh cross beam and the eighth cross beam in the length direction, for arranging and maintaining the pipeline of the crane.

[0025] Preferably, the anti-deformation through hole is arranged in a hexagonal structure, the anti-deformation ability of the hexagonal structure is significantly enhanced compared with that of a circular through hole under the same vertical load, and the hexagonal structure is more convenient for personnel to pass through when the crane is disassembled and maintained.

[0026] Preferably, the chassis is a double-bridge structure, and a first-bridge through hole is arranged at the ninth cross beam of the frame longitudinal beam, and a second-bridge through hole is arranged at the eleventh cross beam of the frame longitudinal beam.

[0027] Preferably, the frame adopts an oil-gas spring independent suspension, and a cantilever frame and an oil-gas spring support are arranged at the outer side of the two longitudinal beams of the frame corresponding to the first-bridge through hole and the second-bridge through hole.

[0028] Another object of the present application is to provide a lifting semi-trailer, which comprises the lifting semi-trailer chassis and a crane arranged on the crane base.

[0029] The present application has the following beneficial effects:

[0030] The four main support oil cylinder sleeves arranged at the four corners of the crane base of the lifting semi-trailer chassis can be connected with main support oil cylinders, so that the lifting force can be directly transmitted to the ground, the tensile force borne by the lower surface of the crane base due to a large bending moment is greatly reduced, and the front and rear auxiliary support legs only need to bear a small lifting moment generated by the lifting distance, thereby greatly reducing the shear force and bending moment borne by the vehicle body during lifting, and reducing the vertical deformation.

[0031] In addition, the chassis maintains the width of the longitudinal beam and the cross beam, greatly saves materials, and facilitates the installation and maintenance operation of the crane, and if the chassis is not used as a crane, the transportation platform can be connected to the transportation platform through the bolt holes on the slewing disc for cargo transportation.

[0032] The lifting semi-trailer chassis can realize a support leg supporting and lifting mode and a fixed platform supporting and lifting mode, and is suitable for two kinds of construction sites, i.e., a temporary site in the wild and a long-term fixed site, and has a wide application range; the maximum lifting force in the support leg supporting and lifting mode can reach 300 tons, the lifting force and the lifting moment in the fixed platform supporting and lifting mode are greatly improved, the maximum lifting force can reach 500 tons, and when a super large piece is lifted, multiple cranes can be combined in any form according to the task requirements to complete the lifting task of a super long structural piece.

[0033] The lifting semi-trailer chassis adopts an oil-gas spring independent suspension of a steering axle, which can improve the off-road performance and realize steering adjustment in a narrow site.

[0034] The crane base in the lifting semitrailer chassis is provided with three layers of structures from top to bottom, wherein the protrusions at the four corners in the upper layer structure can fix the upper end of the main supporting leg oil cylinder, so that the centripetal extrusion force of the main supporting leg oil cylinder top on the slewing disc is uniformly dispersed to the crane base, and large stress is avoided; the middle layer structure can uniformly disperse the force of the crane and transmit it to the third layer, the third layer mainly resists vertical deformation and transmits the force to the fixed platform (the fixed platform supports the lifting mode) through the fixed platform connecting seat or transmits the force to the four main supporting leg oil cylinders (the supporting leg supports the lifting mode) through the longitudinal beam, so that the compression resistance of the crane base is enhanced, and the deformation of the crane base is reduced;

[0035] The fixed platform connecting structure enhances the stability of the crane in the fixed platform lifting mode, and reduces the deformation of the crane base;

[0036] The anti-deformation via hole can be arranged for pipeline arrangement and crane maintenance, and the anti-deformation capability is improved;

[0037] The design of the lifting semitrailer chassis solves the problems of instability, incoordination, poor installation precision and low efficiency of the traditional single crane in lifting large length beams in the prior art, and greatly improves the work efficiency.

DRAWINGS

[0038] Figure 1 is a structural schematic view of the lifting semitrailer according to the present application

[0039] Figure 2 is a structural schematic view II of the lifting semitrailer according to the present application;

[0040] Figure 3 is a top view of the lifting semitrailer according to the present application;

[0041] Figure 4 is a bottom view of the lifting semitrailer according to the present application;

[0042] Figure 5 is a bottom view of the fixed platform connecting seat according to the present application;

[0043] Figure 6 is a front view of the fixed platform connecting seat according to the present application;

[0044] Figure 7 is an exploded view of the crane base according to the present application;

[0045] Figure 8 is a structural schematic view of the front auxiliary supporting leg according to the present application;

[0046] Figure 9 is a structural schematic view of the rear auxiliary supporting leg according to the present application;

[0047] Figure 10 is a structural schematic diagram of the running working condition of the lifting semitrailer chassis according to the present application;

[0048] Figure 11 is a structural schematic diagram of the lifting semitrailer according to the present application;

[0049] 1-frame; 101-longitudinal beam; 102-cross beam; 1021-seventh cross beam; 1022-eighth cross beam; 2-front auxiliary support leg; 201-front fixed beam; 202-front movable support leg; 2021-upright plate; 2022-enclosing plate; 2023-first circular arc reinforcing plate; 2024-stabilizing plate; 2025-inclined plate; 2026-straight pull plate; 203-front vertical oil cylinder sleeve; 204-front horizontal oil cylinder connecting seat; 3-rear auxiliary support leg; 301-rear fixed beam; 302-rear movable support leg; 3021-second circular arc reinforcing plate; 303-rear vertical oil cylinder sleeve; 304-rear horizontal oil cylinder connecting seat; 305-oblique support plate; 4-crane base; 401-upper structure; 4011-upper connecting plate; 4012-crane bottom ring; 4013-protrusion; 402-intermediate layer structure; 4021-vertical support plate; 4022-outer ring support; 4023-inner ring support; 4024-vertical rib plate; 4025-vertical connecting plate; 403-lower structure; 4031-outer vertical plate; 4032-vertical reinforcing rib; 4033-oblique connecting plate; 4034-wire passing hole; 5-main support leg oil cylinder sleeve; 6-elevator base; 7-fixed platform connecting seat; 701-upper connecting plate; 702-lower connecting plate; 703-vertical connecting block; 704-reinforcing plate; 8-oil gas spring support; 9-cantilever frame; 10-lifting arm support; 11-deformation-resistant via hole; 12-crane.

DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is described with the following specific embodiments, but is not limited to the following. The following description is a preferred embodiment of the present application, which is only used to describe the present application, and cannot be understood as a limitation of the present application. It should be pointed out that any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

[0051] As shown in Figures 1-2 , the present application provides a lifting semitrailer chassis and a lifting semitrailer applied thereto, which comprises a frame 1, a front auxiliary support leg 2 located at the front end of the frame 1, a rear auxiliary support leg 3 located at the rear end of the frame 1 and a crane base 4 fixed on the frame;

[0052] The frame 1 includes two longitudinal beams 101 arranged oppositely left and right and thirteen cross beams 102 arranged in sequence from front to back and connected between the two longitudinal beams, the cross section of the longitudinal beam and the cross beam is rectangular; the height of the longitudinal beam in front of the fifth cross beam is higher than the height of the longitudinal beam behind the fifth cross beam, and the width between the two longitudinal beams in front of the eighth cross beam is greater than the width between the two longitudinal beams behind the eighth cross beam; the crane base 4 is fixed on the seventh cross beam, the eighth cross beam and the two longitudinal beams, the front auxiliary support leg 2 is arranged at the third cross beam, and the rear auxiliary support leg 3 is arranged at the twelfth cross beam; the crane base 4 is arranged in a square structure, a crane bottom ring is arranged at the middle position of the top, and a main support leg oil cylinder sleeve 5 is arranged at each of the four corners for connecting the main support leg oil cylinder; the chassis is a double-bridge structure, a bridge through hole is arranged at the ninth cross beam of the longitudinal beam of the frame, and two bridge through holes are arranged at the eleventh cross beam of the longitudinal beam of the frame.

[0053] As shown in Figure 7 , the crane base 4 is arranged in a three-layer structure, specifically including an upper layer structure 401, an intermediate layer structure 402 and a lower layer structure 403 arranged in sequence from top to bottom;

[0054] The upper layer structure includes an upper layer connecting plate 4011, a crane bottom ring 4012 composed of an outer ring and an inner ring is arranged at the middle position of the upper surface of the upper layer connecting plate 4011, and the crane is connected by bolts; a protrusion 4013 is further arranged at each of the four corners of the upper surface of the upper layer connecting plate 4011, the upper surface of the protrusion 4013 is flush with the upper surface of the main support leg oil cylinder sleeve, and the main support leg oil cylinder sleeve 5 and the upper surface of the upper layer connecting plate are welded together, for fixing the upper end of the main support leg oil cylinder sleeve, so that the centripetal extrusion force of the top of the main support leg oil cylinder sleeve to the crane slewing ring is evenly dispersed to the crane base during hoisting, avoiding the generation of large stress;

[0055] The intermediate layer structure 402 is fixedly arranged at the top of the two longitudinal beams and the seventh cross beam and the eighth cross beam, and includes a vertical support plate 4021 surrounding a quadrilateral structure in a head-to-tail manner, a circular ring support is arranged at the inner middle position of the vertical support plate 4021, the circular ring support includes an outer ring support 4022 and an inner ring support 4023 arranged concentrically, the outer ring support 4022 and the inner ring support 4023 correspond to the outer ring and the inner ring of the upper layer structure respectively; and vertical rib plates 4024 are arranged between the vertical support plate 4021 and the outer ring support 4022 and between the outer ring support 4022 and the inner ring support 4023, in the embodiment, the vertical rib plates 2024 are arranged in a radial manner, and there are 24 vertical rib plates 2024 in total;

[0056] As preferred, upper portions of the seventh and eighth cross beams are respectively provided with vertical connecting plates 4025 at front and rear ends of the upper layer connecting plates, and vertical rib plates are arranged between the vertical connecting plates 4025 and the vertical support plates 4021. The upper layer connecting plates are welded with the middle layer as a whole, so that the hoisting load is directly transmitted to the main support oil cylinder, the stress of the lower structure of the base is reduced, and the force of the crane is dispersed and uniformly transmitted to the lower structure.

[0057] The main body of the lower structure 403 is a frame longitudinal beam and seventh and eighth cross beams. The longitudinal beams are connected in series at front and rear of the crane base, and serve as an inner layer of the lower structure of the crane base. Specifically, the lower structure 403 is composed of the seventh cross beam 1021, the eighth cross beam 1022 and two longitudinal beams between the seventh cross beam 1021 and the eighth cross beam 1022. Outer vertical plates 4031 are arranged at outer sides of the two longitudinal beams. The outer vertical plates 4031 are inwardly bent at front and rear of the crane base and are collected in the longitudinal beam outer web. The seventh cross beam, the eighth cross beam and the two longitudinal beams are all arranged as hollow box structures. Vertical reinforcing ribs 4032 are arranged between the inner sides of the box structures and the longitudinal beams, so that the inner space is divided into a grid structure, the deformation resistance is improved, and the force is uniformly transmitted to the fixed platform (platform support lifting mode) or to the four main support oil cylinders (support leg support lifting mode). Diagonal connecting plates 4033 are arranged at four corners of the middle through hole surrounded by the seventh cross beam, the eighth cross beam and the two longitudinal beams. Wire holes 4034 are arranged on the diagonal connecting plates 4033.

[0058] Anti-deformation through holes 11 are arranged at middle positions of the seventh cross beam 4021 and the eighth cross beam 1022 in the length direction, for wiring arrangement and crane maintenance. In the embodiment, the anti-deformation through holes 11 are arranged as hexagonal structures. The anti-deformation ability of the structure under the same vertical load is stronger than that of a circular through hole, and personnel can pass through the structure when the crane is disassembled and maintained.

[0059] As preferred, the vertical reinforcing ribs 4032 are provided with weight reduction holes to reduce the weight of the chassis.

[0060] As shown in Figure 4 The bottom of the crane base 4 is also provided with fixed platform connecting seats 7. The fixed platform connecting seats 7 are arranged at the bottom of the seventh cross beam, the eighth cross beam and the left and right longitudinal beams between the seventh cross beam and the eighth cross beam. Two fixed platform connecting seats 7 are arranged at each position, for connection with the reserved interfaces of the fixed platform, so that the fixed platform lifting mode is realized by using the fixed platform.

[0061] As shown in Figure 5 and 6As shown, the fixed platform connecting seat 7 comprises horizontally arranged upper connecting plate 701 and lower connecting plate 702, the upper connecting plate 701 is fixedly connected at the bottom of the frame, the lower connecting plate 702 is fixedly connected below the upper connecting plate 701 through vertical connecting block 703, and the width of the lower connecting plate 702 is greater than that of the upper connecting plate 701; a plurality of connecting holes 705 are uniformly arranged on the lower connecting plate 702 around the periphery, and eight connecting holes 705 are arranged in the embodiment, which are connected by using horse bolts or ordinary bolts when connected with the fixed platform.

[0062] As preferred, a reinforcing plate 704 is arranged between the upper connecting plate 701 and the vertical connecting block 703, which is attached to the lower side of the upper connecting plate 701, and the length and width of the reinforcing plate 704 are less than those of the upper connecting plate 701.

[0063] As preferred, a plurality of vertical connecting blocks 703 are arranged along the two length edges of the reinforcing plate 704, and eight vertical connecting blocks 703 are arranged in the embodiment, and a certain distance is reserved between adjacent two vertical connecting blocks 703, so as to facilitate the disassembly and assembly of the bolts.

[0064] As shown in Figure 2 and 3 As shown, the frame 1 is further provided with an elevator base 6, which is arranged at the second cross beam of the right longitudinal beam, and the elevator base 6 is arranged as a circular protrusion, a plurality of bolt holes are uniformly arranged on the circumference of the circular protrusion, and the bolt holes are connected with the lifting arms of the folding arm type elevator by using bolts; during construction, the workers can enter the lifting platform of the folding arm type elevator, and then perform on-site command, maintenance and auxiliary installation operations after the lifting platform is lifted.

[0065] The front auxiliary support leg 2 comprises a front fixed beam 201 fixed at the top of the third cross beam of the frame and a front movable support leg 202 rotatably connected at both ends of the front fixed beam 201, and a front vertical oil cylinder sleeve 203 is arranged at the end of each front movable support leg 202 away from the front fixed beam 201, which is used for connecting a front vertical oil cylinder.

[0066] As shown in Figure 8 The front movable support leg 202 comprises two vertical plates 2021 arranged opposite to each other, and a plurality of sealing plates 2022 arranged at the top and bottom between the two vertical plates, the vertical plate 2021 comprises a first horizontal portion, a first inclined portion and a second horizontal portion connected in sequence, the first inclined portion is inclined downward, and the front vertical oil cylinder sleeve is arranged at the end of the second horizontal portion away from the first inclined portion.

[0067] The outer side of the bottom of the vertical plate and the outer side of the fourth cross beam of the two longitudinal beams of the frame are respectively fixed with a front horizontal oil cylinder connecting seat 203 for connecting the front horizontal oil cylinder, and the front horizontal oil cylinder is used to drive the outward extension and retraction of the front movable supporting legs, and when the outward extension, the two front movable supporting legs are located on the same straight line with the front fixed beam, and when the retraction, the two movable supporting legs are perpendicular to the front fixed beam.

[0068] As preferred, the first horizontal part and the first inclined part at the lower outer side of the two vertical plates are respectively attached with a first circular arc reinforcing plate 2023, and the central angle of the first circular arc reinforcing plate 2023 is the same as the included angle between the first horizontal part and the first inclined part, so as to reinforce the connecting bending part, reduce the working stress, and improve the working life.

[0069] As preferred, the front movable supporting leg 202 in the embodiment is further vertically provided with two stabilizing plates 2024, the stabilizing plates 2024 are located at the front horizontal oil cylinder connecting seat 204, and are used to reinforce the vertical plate 2021 at the front horizontal oil cylinder connecting seat 204 to prevent the vertical plate from being deformed by the action of the front horizontal oil cylinder; an inclined plate 2025 is further arranged between the two vertical plates, the inclined plate 2025 is arranged at the connecting position of the first horizontal part and the first inclined part, and the two sides of the inclined plate 2025 are respectively welded with the two vertical plates, and the upper end and the lower end of the inclined plate 2025 are respectively welded with the sealing plates at the connecting positions of the first horizontal part and the first inclined part, so as to further reinforce the bending part.

[0070] As preferred, the sealing plate at the bottom of the first horizontal part of the front movable supporting leg extends to the inside of the front movable supporting leg, and the end of the sealing plate abuts against the inside of the sealing plate of the inclined part of the vertical plate.

[0071] The rear auxiliary supporting leg 3 comprises a rear fixed beam 301 fixed on the top of the twelfth cross beam of the frame and rear movable supporting legs 302 respectively rotationally connected at the two ends of the rear fixed beam 301, the length of the rear fixed beam 301 is the same as the length of the front fixed beam, and a rear vertical oil cylinder sleeve 303 is arranged at the end of the rear movable supporting leg 302 away from the rear fixed beam 301, and is used to connect the rear vertical oil cylinder.

[0072] As shown in Figure 2 , the front side of the rear fixed beam is further provided with two inclined supporting plates 305, one end of the inclined supporting plate 305 is fixed on the top of the two longitudinal beams, and the other end is fixed on the front side of the rear fixed beam, and a horizontal supporting plate is further arranged between each inclined supporting plate 305 and the rear fixed beam, and is used to support the rear fixed beam 301; a rear supporting leg oil cylinder connecting seat is arranged on the front side of the rear movable supporting leg 302 and the outer side of the two inclined supporting plates 305, and is used to connect the rear supporting leg oil cylinder, and the rear supporting leg oil cylinder is used to drive the extension and retraction of the rear movable supporting leg.

[0073] As shown in Figure 9As shown, the structure of the rear movable support leg 302 is similar to the front movable support leg, and the difference is that a second inclined portion is arranged at the end of the first horizontal portion of the two vertical plates of the rear movable support leg 302 away from the inclined portion, a third horizontal portion is arranged at the end of the second inclined portion away from the first horizontal portion, and the height of the third horizontal portion is lower than that of the first horizontal portion; a second circular arc reinforcing plate 3021 is arranged at the connection between the bottom of the outer side of the vertical plate and the third horizontal portion and the second inclined portion, so as to reinforce the bending portion.

[0074] As preferred, a straight pull plate 2026 is arranged in the front movable support leg 202, the straight pull plate 2026 is horizontally arranged between the two vertical plates 2021, a certain distance is left between the bottom of the straight pull plate 2026 and the sealing plate of the bottom of the first horizontal portion, and the straight pull plate 2026 is flush with the upward bending portion of the front movable support leg close to one end of the front fixed beam, one end of the straight pull plate 2026 is fixedly connected to the end of the front movable support leg 202 close to the front fixed beam, and the other end is abutted against the inner side of the sealing plate of the first inclined portion of the vertical plate.

[0075] As preferred, a top of the front fixed beam is further provided with a lifting arm support 10, and the top of the lifting arm support 10 is provided with a concave structure with high in the middle and low on both sides, for placing the lifting arm.

[0076] As shown in Figure 1 and 2 As shown, the frame adopts an oil-gas spring independent suspension, and the cantilever frame 9 and the oil-gas spring support 8 are arranged at the one-axle through hole and the two-axle through hole corresponding to the outer sides of the two longitudinal beams of the frame, and the structure of the cantilever frame 9 and the oil-gas spring support 8 is the same as that of the prior art, and will not be described here.

[0077] The lifting semi-trailer chassis has two lifting modes, i.e., a support leg supporting lifting mode and a fixed platform supporting lifting mode.

[0078] The support leg supporting lifting mode is suitable for temporary site construction in the wild, and when working, the oil cylinders at the four main support legs around the crane base and the front auxiliary support leg and the rear auxiliary support leg are all extended, the oil cylinders at the main support legs on the same side and the vertical oil cylinders at the front and rear auxiliary support legs can be arranged to be through or locked, when being through, the pressure ratio is 4:1, so that the load bearing capacity of the auxiliary support legs and the vertical displacement of the rotating disc can be greatly reduced, and the weight of the front and rear auxiliary support legs is reduced.

[0079] The fixed platform supporting hoisting mode is suitable for long-term fixed site construction. When working, eight fixed platform connecting seats at the bottom of the crane base are fixed on the cement platform previously built in the long-term construction site by using the horse bolts or ordinary bolts (the platform is provided with bolt connecting interfaces in advance). In this mode, all the oil cylinders at the main support legs are retracted, and all the oil cylinders at the front auxiliary support legs and the rear auxiliary support legs are extended to provide the overturning moment. In this mode, the maximum lifting force can reach 500 tons, which can greatly reduce the counterweight required to complete the large lifting moment, and can complete the large-span and large-area hoisting task by using the array combination construction of multiple cranes.

[0080] As shown in Figure 10 When the crane semitrailer chassis is not working, the movable support legs of the front auxiliary support legs and the rear auxiliary support legs are retracted to be parallel to the vehicle frame longitudinal beam, so as to save space and improve the vehicle passability.

[0081] Embodiment 2

[0082] As shown in Figure 11 The embodiment provides a crane semitrailer, which comprises the crane semitrailer chassis in embodiment 1 and a crane 12 arranged on the crane base.

[0083] The above-mentioned embodiments only express some embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present section. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A lifting tractor-semitrailer chassis, characterized in that The crane base is fixed on the seventh, eighth cross beams and the two longitudinal beams, and is provided in a quadrilateral structure, and one main support oil cylinder sleeve is arranged at each corner thereof. The crane base comprises an upper layer structure, an intermediate layer structure and a lower layer structure arranged in sequence from top to bottom. The upper layer structure comprises an upper layer connecting plate, and a crane bottom ring composed of an outer ring and an inner ring is arranged at the middle position of the upper surface of the upper layer connecting plate, and one convex projection flush with the upper surface of the main support oil cylinder sleeve is arranged at each corner. The intermediate layer structure is fixed on the top of the seventh, eighth cross beams and the two longitudinal beams between the seventh and eighth cross beams, and comprises four vertical support plates connected in sequence to form a quadrilateral structure, and one outer ring support and one inner ring support are arranged in the vertical support plates corresponding to the outer ring and the inner ring of the upper layer structure. The lower layer structure is composed of the seventh, eighth cross beams and the two longitudinal beams between the seventh and eighth cross beams, and one outer vertical plate is arranged outside each longitudinal beam, and the seventh, eighth cross beams and the two longitudinal beams are provided in a box type structure, and vertical reinforcing ribs are arranged between the outer vertical plates and the two longitudinal beams. The seventh and eighth cross beams are provided with anti-deformation through holes at the middle positions in the length direction, and the anti-deformation through holes are provided in a hexagonal structure.

2. The lift tractor trailer chassis of claim 1, wherein, The bottom of the crane base is provided with a plurality of fixed platform connecting seats, and the bottom of each fixed platform connecting seat is provided with a plurality of connecting holes.

3. The lift tractor trailer chassis of claim 1, wherein, An elevator base is further arranged on the frame, and the elevator base is arranged on the second cross beam of the right longitudinal beam.

4. The lift tractor trailer chassis of claim 1, wherein, The front auxiliary support leg comprises a front fixed beam fixed on the top of the third cross beam of the frame and front movable support legs rotatably connected to the two ends of the front fixed beam, and one front vertical oil cylinder sleeve is arranged at the end of each front movable support leg away from the front fixed beam.

5. The lift tractor trailer chassis of claim 1, wherein, A front horizontal oil cylinder connecting seat is arranged at the outer side of the fourth cross beam of each longitudinal beam at the rear side of each front movable support leg.

6. The lift tractor trailer chassis of claim 5, wherein, The front side of the rear fixed beam is further provided with two inclined support plates, one end of each inclined support plate is fixed on the top of the two longitudinal beams, and the other end is fixed on the front side of the rear fixed beam. A rear support oil cylinder connecting seat is arranged at the front side of each rear movable support leg and the outer side of each inclined support plate.

7. The lift tractor trailer chassis of claim 6, wherein, The front movable supporting leg and the rear supporting leg each comprise two vertical plates arranged in parallel and a plurality of sealing plates connected to the top and bottom of the two vertical plates respectively, the side of the vertical plate away from the frame is bent downward, and a first circular arc reinforcing plate is attached to the bent portion of the outer side of each vertical plate; a stabilizing plate and an inclined plate are arranged in the front movable supporting leg and the rear movable supporting leg respectively, the stabilizing plate is arranged vertically at the front horizontal oil cylinder connecting seat and the rear horizontal oil cylinder connecting seat respectively, and the inclined plate is arranged obliquely at the bent portion of the vertical plate.

8. The Rigid Truck Chassis of claim 1, wherein, The chassis is of a double-bridge structure, a bridge through hole is arranged at the tenth cross beam of the frame longitudinal beam, a two-bridge through hole is arranged at the eleventh cross beam of the frame longitudinal beam, and the frame adopts an oil-gas spring independent suspension, and cantilever frames and oil-gas spring supports are arranged at the positions corresponding to the bridge through hole and the two-bridge through hole on the outer sides of the two longitudinal beams of the frame.

9. A lifting semi-trailer, characterized in that The crane comprises the lifting semi-trailer chassis and a crane arranged on the base of the crane.

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