High-bearing-capacity semitrailer chassis structure

Abstract

The invention relates to the technical field of frames, in particular to a high-bearing-capacity semitrailer chassis structure which comprises a frame and a feeding frame used for loading and unloading materials. The frame is composed of a keel and a cross beam fixedly installed on the keel. A tail beam seat is fixedly installed at one end of the keel, a rotating shaft is fixedly installed on the tail beam seat, a rotating plate is rotatably installed on the rotating shaft, a feeding frame is fixedly installed on the rotating plate, a second hydraulic cylinder is rotatably installed on the feeding frame, and the second hydraulic cylinder is rotatably installed on the tail beam seat. According to the automatic feeding device, during use, a second hydraulic cylinder is started to pull the feeding frame to rotate through a rotating shaft, the feeding frame makes contact with the ground after rotating, a slope is formed, then goods feeding and discharging are assisted, the face, making contact with the goods, of the feeding frame is a second supporting face, the goods can be assisted to be fed, the feeding frame is matched with a vehicle frame, and the using effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle frames, and particularly to a semi-trailer chassis structure with high load-bearing capacity. Background Art

[0002] As a core equipment for road logistics transportation, the load-bearing performance of the chassis structure of a semi-trailer directly affects transportation efficiency and safety. The contradiction between the high load-bearing demand and lightweight design of the semi-trailer chassis is becoming increasingly prominent. Due to insufficient lateral stiffness, the traditional frame structure faces severe challenges under heavy load or off-load conditions. Especially in the scenario of bulk cargo transportation, the lateral pressure of the cargo is likely to cause deformation of the side plates of the chassis, and even lead to cracking of the welds at the connection between the longitudinal beam and the side beam. In addition, in the scenario of bulk cargo transportation (such as sand and gravel, grains, etc.), efficient and safe loading and unloading operations are the key links to improve the logistics turnover efficiency. Traditional semi-trailers rely on external ramp equipment or forklifts to assist in loading goods, which is rather troublesome.

[0003] The patent application with the application number CN202410599711.9 relates to the technical field of vehicles, and specifically discloses a frame assembly. The frame assembly includes a gantry beam assembly, a longitudinal beam assembly, a lifting assembly, and a rear tail beam assembly. The gantry beam assembly is enclosed by a U-shaped cast beam and a sealing cross beam to form a ring beam structure. The U-shaped cast beam reduces the welding process and improves the strength, and the deformation amount of the frame assembly is reduced. The two forging support seats of the lifting assembly are forged, which have the advantages of high strength, good toughness, and high manufacturing precision. Therefore, compared with the lifting beam seat manufactured by the welding process, the forging support seat is less likely to deform, and the lifting beam fixedly connected thereto can withstand greater pressure. The two tail beam seats of the rear tail beam assembly are made by casting, which reduces the welding amount and improves the strength and manufacturing precision of the tail beam seat. Since the welding amount of the frame assembly is small, its manufacturing precision is high, its strength is high, and it is not easy to deform. A large number of components are made by forging and casting processes, thereby reducing the overall manufacturing cost of the frame assembly.

[0004] However, the feeding of this patent relies on external ramp equipment, and the temporary construction of the equipment not only takes time, but also is not stably connected to the vehicle body and is prone to loading and unloading accidents.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above defects. Summary of the Invention

[0006] The purpose of the present invention is to provide a semi-trailer chassis structure with high load-bearing capacity that can effectively solve the above technical problems.

[0007] To achieve the purpose of the present invention, the following technical solutions are adopted: A semi-trailer chassis structure with high load-bearing capacity, comprising: a vehicle frame, a connecting frame for connecting the vehicle frame with the semi-trailer head, and a feeding frame for loading and unloading materials; The frame is composed of a keel and crossbeams fixedly installed on the keel; One end of the keel is fixedly installed with a tail beam seat, a rotating shaft is fixedly installed on the tail beam seat, a rotating plate is rotatably installed on the rotating shaft, a feeding rack is fixedly installed on the rotating plate, a second hydraulic cylinder is rotatably installed on the feeding rack, and the second hydraulic cylinder is rotatably installed on the tail beam seat; Cover plates are fixedly installed on adjacent two groups of crossbeams; Multiple groups of crossbeams are equidistantly installed on the keel, and the multiple groups of crossbeams and the keel form a first support surface, and the surface of the feeding rack in contact with the goods is a second support surface.

[0008] Furthermore, a connecting beam is slidably connected to the keel, a support plate is fixedly installed on the inner wall of the connecting beam, a connecting hole is opened on the connecting beam, a clamping hole is opened on the keel, a support frame is fixedly installed on the crossbeam, and a fixing pin is slidably connected to the support frame.

[0009] Furthermore, a side beam is fixedly connected to the crossbeam, a first hydraulic cylinder is fixedly installed on the crossbeam, an adjusting plate is fixedly installed on the output shaft of the first hydraulic cylinder, a reinforcing beam is slidably connected to the adjusting plate, a connecting piece is fixedly connected to the reinforcing beam, and one end of the fixing pin is provided with a spherical surface.

[0010] Furthermore, the connecting piece is fixedly connected to the side beam, and the adjusting plate is slidably connected to the side beam.

[0011] Furthermore, a chute is opened on the reinforcing beam, a first spring is fixedly installed on the chute, a slider is fixedly installed on the first spring, a rotating seat is fixedly installed on the slider, a connecting rod is rotatably installed on the rotating seat, and the connecting rod is rotatably connected to the feeding rack.

[0012] Furthermore, a push rod is fixedly installed on the slider, a bladder is fixedly installed on the chute, a hose is communicated with the bladder, one end of the hose is communicated with a telescopic member, and a support member is rotatably installed on the feeding rack, and the telescopic end of the support member abuts against the support member.

[0013] Furthermore, the slider is slidably installed in the chute, and the telescopic member is fixedly installed on the feeding rack.

[0014] Furthermore, a card slot is opened on the adjusting plate, a sliding sleeve is slidably installed on the rotating shaft, a second spring is fixedly installed on the sliding sleeve, the second spring is fixedly connected to the rotating shaft, a guiding groove is opened on the rotating plate, the guiding groove cooperates with the sliding sleeve, and a clamping block is fixedly installed at one end of the sliding sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In a semi-trailer chassis structure with high load-bearing capacity according to the present invention, a tail beam seat is fixedly installed at one end of a keel. A rotating shaft is fixedly installed on the tail beam seat, and a rotating plate is rotatably installed on the rotating shaft. A loading rack is fixedly installed on the rotating plate, and a second hydraulic cylinder is rotatably installed on the loading rack. The second hydraulic cylinder is rotatably installed on the tail beam seat. When in use, the second hydraulic cylinder is started to pull the loading rack to rotate through the rotating shaft, so that the loading rack rotates and contacts the ground after rotation, thereby forming a slope, and further assisting in loading and unloading goods. The surface of the loading rack in contact with the goods is the second support surface, which can assist in loading goods. The loading rack matches the vehicle frame, and the use effect is better. 2. In a semi-trailer chassis structure with high load-bearing capacity according to the present invention, on the one hand, the adjusting plate and the reinforcing beam can reinforce the side of the vehicle frame and improve the side load-bearing capacity of the vehicle frame. On the other hand, when the adjusting plate moves, it can drive the fixing pin to enter the connecting hole and the clamping hole to connect the keel and the connecting frame. And when the adjusting plate moves in the other direction, the clamping groove and the clamping block cooperate to make the loading rack horizontal with the vehicle frame, forming a temporary working platform, which can assist in transporting a certain amount of goods or be used to place maintenance tools during the maintenance of the vehicle frame, and the use effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0017] Figure 1 It is a schematic diagram of a semi-trailer chassis structure with high load-bearing capacity according to the present invention; Figure 2 It is a schematic diagram of the keel of a semi-trailer chassis structure with high load-bearing capacity according to the present invention; Figure 3 It is a schematic diagram of the connecting beam of a semi-trailer chassis structure with high load-bearing capacity according to the present invention; Figure 4 It is a semi-trailer chassis structure with high load-bearing capacity according to the present invention Figure 3 The enlarged schematic diagram at A in; Figure 5 It is a schematic diagram of the loading rack of a semi-trailer chassis structure with high load-bearing capacity according to the present invention; Figure 6 It is a schematic diagram of the reinforcing beam of a semi-trailer chassis structure with high load-bearing capacity according to the present invention; Figure 7 It is a sectional view schematic diagram of the reinforcing beam of a semi-trailer chassis structure with high load-bearing capacity according to the present invention; Figure 8 It is a schematic diagram of the adjusting plate of a semi-trailer chassis structure with high load-bearing capacity according to the present invention; Figure 9 It is a schematic diagram of the sliding sleeve of a semi-trailer chassis structure with high load-bearing capacity according to the present invention.

[0018] In the figure: 1, vehicle frame; 11, keel; 111, connecting beam; 112, support plate; 113, connecting hole; 12, cross beam; 13, cover plate; 14, reinforcing beam; 141, first hydraulic cylinder; 142, adjusting plate; 1421, limiting groove; 1422, clamping groove; 143, connecting piece; 1431, sliding groove; 1432, first spring; 1433, slider; 14331, rotating seat; 14332, connecting rod; 1434, ejector rod; 1435, bladder; 1436, hose; 1437, telescopic member; 144, support frame; 145, fixing pin; 146, spherical surface; 147, clamping hole; 15, tail beam seat; 151, rotating plate; 152, guiding groove; 153, rotating shaft; 154, sliding sleeve; 155, second spring; 16, side beam; 2, connecting frame; 3, loading rack; 31, second hydraulic cylinder; 32, support member. Detailed implementation manners

[0019] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below. Apparently, the described embodiments are some but not all of the embodiments of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0021] As Figures 1 to 9 shown, a semi-trailer chassis structure with high load-bearing capacity of the present invention includes: a vehicle frame 1, a connecting frame 2 for connecting the vehicle frame 1 with a semi-trailer head, and a loading rack 3 for loading and unloading materials.

[0022] Goods are transported to the surface of the vehicle frame 1, and the vehicle frame 1 is connected to the semi-trailer head through the connecting frame 2. The structure of the connecting frame 2 is a mature structure of the prior art and will not be elaborated here.

[0023] Specifically, the vehicle frame 1 is composed of a keel 11 and cross beams 12 fixedly installed on the keel 11. Multiple groups of cross beams 12 are installed on the keel 11 at equal intervals. The multiple groups of cross beams 12 and the keel 11 form a first support surface. The cross beams 12 and the keel 11 are welded together, with a simple structure and low production cost. Cover plates 13 are fixedly installed on adjacent two groups of cross beams 12. The cover plates 13 can increase the area of the first support surface, improve the load capacity of the vehicle frame 1, and when the goods collide with the vehicle frame 1, the cover plates 13 can reduce part of the impact force to avoid damage to the vehicle frame 1. It should be noted that in actual use, guardrails and bottom plates also need to be installed on the vehicle frame 1, and the cover plates 13 do not directly contact the goods. In addition, the cover plates 13 are connected to adjacent two groups of cross beams 12, upgrading the linear load transfer mode of the traditional longitudinal beam to a surface load transfer, reducing the concentrated pressure on a single keel 11, and is especially suitable for the uniform load scenario of large-sized bulk goods.

[0024] In addition, to achieve the lightweight of the vehicle frame 1 and improve the load-bearing capacity of the vehicle frame 1, the keel 11 is of a hollow structure. However, the hollow structure will cause a reduction in the strength of the keel 11 of the vehicle frame 1. Therefore, a connecting beam 111 is slidably connected to the keel 11. A support plate 112 is fixedly installed on the inner wall of the connecting beam 111. The support plate 112 supports the connecting beam 111 to ensure the strength of the connecting beam 111. The connecting beam 111 supports the strength of the keel 11. When the keel 11 bears a vertical bending load, the support plate 112 on the inner wall of the connecting beam 111 transfers part of the stress to the connecting frame 2 through shear action, reducing the local bending moment of the keel 11 and suppressing the deformation risk of the hollow structure. And one end of the connecting beam 111 is fixedly connected to the connecting frame 2, enabling a stable connection between the vehicle frame 1 and the connecting frame 2.

[0025] Regarding the above, a connecting hole 113 is opened on the connecting beam 111, a clamping hole 147 is opened on the keel 11, a support frame 144 is fixedly installed on the cross beam 12, and a fixing pin 145 is slidably connected to the support frame 144. After the connecting beam 111 and the keel 11 are slidably connected, the fixing pin 145 is manually pushed into the connecting hole 113 and the clamping hole 147 to realize the connection between the connecting beam 111 and the keel 11. In addition, the movement of the fixing pin 145 can also be realized by an external power source. When the connecting beam 111 and the keel 11 are connected by the fixing pin 145, the shear surface of the support plate 112 and the keel hollow cavity form a composite pressure-bearing structure, which can convert part of the concentrated load into a surface load and transfer it to the connecting frame 2.

[0026] To strengthen the lateral load-bearing capacity of the vehicle frame 1 and improve the usage effect of the vehicle frame 1, a side beam 16 is fixedly connected to the cross beam 12. A first hydraulic cylinder 141 is fixedly installed on the cross beam 12. The output shaft of the first hydraulic cylinder 141 is fixedly installed with an adjusting plate 142. A reinforcing beam 14 is slidably connected to the adjusting plate 142. A connecting piece 143 is fixedly connected to the reinforcing beam 14, and the connecting piece 143 is fixedly connected to the side beam 16. One end of the fixing pin 145 is provided with a spherical surface 146. The adjusting plate 142 is slidably connected to the side beam 16. When in use, the first hydraulic cylinder 141 is started to drive the adjusting plate 142 to slide. The adjusting plate 142 presses the fixing pin 145 through the spherical surface 146 into the inside of the clamping hole 147 and the connecting hole 113 to complete the connection between the keel 11 and the connecting beam 111. The reinforcing beam 14 can improve the anti-lateral deformation ability of the vehicle frame 1. When transporting bulk goods, lateral deformation can be avoided and the load-bearing capacity can be improved. The connecting piece 143 is of a plate-like structure.

[0027] Moreover, the contact surface between the spherical surface 146 and the adjusting plate 142 is smaller, reducing the frictional resistance.

[0028] A reset member is fixedly installed on the fixing pin 145, and the reset member is fixedly installed on the surface of the support frame 144. When the fixing pin 145 enters the inside of the clamping hole 147 and the connecting hole 113 under the action of the contact between the spherical surface 146 and the adjusting plate 142, the reset member deforms synchronously. When the adjusting plate 142 no longer contacts the spherical surface 146, the reset member resets to drive the fixing pin 145 to reset, facilitating subsequent use. It should be noted that the reset member is preferably a spring. After the fixing pin 145 enters the inside of the clamping hole 147 and the connecting hole 113, the elastic deformation of the reset member provides a continuous pre-tightening force to compensate for the loosening of the fixing pin 145 caused by vibration.

[0029] In this way, the problem that directly driving the fixing pin 145 into the inside of the connecting hole 113 and the clamping hole 147 by a power source causes the vibration generated when the vehicle frame 1 is in use to be transmitted to the power source through the fixing pin 145, accelerating the damage of the power source, is avoided.

[0030] In addition, a limiting block matching the limiting groove 1421 is provided on the side beam 16, making the adjusting plate 142 more stable and not wobbling when sliding.

[0031] To solve the problem that traditional semi-trailers rely on external ramp equipment or forklifts to assist in loading goods, which is rather troublesome, a tail beam seat 15 is fixedly installed at one end of the keel 11 of this application. A rotating shaft 153 is fixedly installed on the tail beam seat 15. A rotating plate 151 is rotatably installed on the rotating shaft 153. A loading rack 3 is fixedly installed on the rotating plate 151. A second hydraulic cylinder 31 is rotatably installed on the loading rack 3, and the second hydraulic cylinder 31 is rotatably installed on the tail beam seat 15.

[0032] When in use, the hydraulic cylinder II 31 is activated to pull the loading rack 3 to rotate through the rotating shaft 153, so that the loading rack 3 rotates and contacts the ground after rotation, thereby forming a slope, which further assists in loading and unloading goods. The surface of the loading rack 3 that contacts the goods is the second support surface, which can assist in loading goods. The loading rack 3 matches the vehicle frame 1, and the use effect is better.

[0033] It should be added that a chute 1431 is provided on the reinforcing beam 14. A first spring 1432 is fixedly installed on the chute 1431. A slider 1433 is fixedly installed on the first spring 1432. A rotating seat 14331 is fixedly installed on the slider 1433. A connecting rod 14332 is rotatably installed on the rotating seat 14331. The connecting rod 14332 is rotatably connected to the loading rack 3.

[0034] When the hydraulic cylinder II 31 drives the loading rack 3 to tilt, the loading rack 3 pulls the rotating seat 14331 through the connecting rod 14332 to drive the slider 1433 to slide in the chute 1431, and drives the first spring 1432 to deform. When the hydraulic cylinder II 31 no longer pulls the loading rack 3 to tilt, the first spring 1432 resets and pulls the slider 1433 to reset in the chute 1431. At the same time, the loading rack 3 is pulled to reset through the connecting rod 14332, which is convenient for subsequent use.

[0035] It should be noted that a push rod 1434 is fixedly installed on the slider 1433. An airbag 1435 is fixedly installed on the chute 1431. A hose 1436 is communicated with the airbag 1435. One end of the hose 1436 is communicated with a telescopic member 1437. The slider 1433 is slidably installed in the chute 1431. A support member 32 is rotatably installed on the loading rack 3. The support member 32 is a telescopic sleeve rod. The telescopic end of the support member 32 abuts against the support member 32. The support member 32 is plate-shaped. The telescopic member 1437 is fixedly installed on the loading rack 3. A metal plate is installed on one side of the airbag 1435. The push rod 1434 further squeezes the airbag 1435 by squeezing the metal plate.

[0036] When the hydraulic cylinder II 31 pulls the loading rack 3 to tilt, the connecting rod 14332 slides in the chute 1431 through the rotating seat 14331 and the slider 1433. At the same time, it drives the push rod 1434 to squeeze the airbag 1435, so that the liquid in the airbag 1435 is discharged to the telescopic member 1437 through the hose 1436. Furthermore, the telescopic end of the telescopic member 1437 is ejected to push the support member 32 to tilt. When the loading rack 3 contacts the ground, the support member 32 also contacts the ground, thereby assisting in supporting the loading rack 3 to prevent the loading rack 3 from deforming due to excessive weight of the goods. In addition, after the loading rack 3 resets (after the goods are loaded, the loading rack 3 is perpendicular to the vehicle frame 1), the support member 32 resets under the action of gravity, but there is still some liquid left in the telescopic member 1437. At this time, when the tail of the vehicle frame 1 is impacted, the liquid in the telescopic member 1437 is discharged, and the impact force can also be reduced, further protecting the hydraulic cylinder II 31.

[0037] That is to say, on the one hand, the support member 32 can assist in supporting the loading rack 3, and on the other hand, it can protect the second hydraulic cylinder 31, preventing the second hydraulic cylinder 31 from being directly damaged when the tail of the semi-trailer is impacted during cargo transportation.

[0038] Finally, a card slot 1422 is formed on the adjusting plate 142. A sliding sleeve 154 is slidably installed on the rotating shaft 153, and a second spring 155 is fixedly installed on the sliding sleeve 154. The second spring 155 is fixedly connected to the rotating shaft 153. A guiding groove 152 is formed on the rotating plate 151, and the guiding groove 152 cooperates with the sliding sleeve 154. The sliding sleeve 154 is an annular sleeve with an arc-shaped protrusion at one end. A clamping block is fixedly installed at one end of the sliding sleeve 154, and multiple groups of clamping blocks are provided. When the loading plate rotates, the sliding sleeve 154 is pushed along the axial direction of the rotating shaft 153 through the guiding groove 152, driving the clamping block to move. When the loading plate rotates to be horizontal with the vehicle frame 1 and the first hydraulic cylinder 141 is activated to drive the adjusting plate 142 to move towards the loading rack 3, the adjusting plate 142 is clamped with the clamping block through the card slot 1422 to fix the sliding block 1433. At this time, the loading rack 3 cannot rotate, forming a temporary working platform, which can assist in transporting a certain amount of goods or be used to place maintenance tools during the maintenance of the vehicle frame 1. It should be noted that when the sliding sleeve 154 moves, it will drive the second spring 155 to deform. When the rotating plate 151 resets, the second spring 155 can assist the sliding sleeve 154 to reset.

[0039] Generally speaking, the adjusting plate 142 and the reinforcing beam 14 can, on the one hand, reinforce the side of the vehicle frame 1, improving the side load-bearing capacity of the vehicle frame 1. On the other hand, when the adjusting plate 142 moves, it can drive the fixing pin 145 into the connection hole 113 and the clamping hole 147 to connect the keel 11 and the connecting frame 2. And when the adjusting plate 142 moves in the other direction, the card slot 1422 cooperates with the clamping block, enabling the loading rack 3 to be horizontal with the vehicle frame 1, forming a temporary working platform, which can assist in transporting a certain amount of goods or be used to place maintenance tools during the maintenance of the vehicle frame 1, with better use effects.

[0040] It should be noted that the adjusting plate 142 can fix the rotating shaft 153 and extrude the fixing pin 145. When a single action on the rotating shaft 153 or the fixing pin 145 is required, only the first hydraulic cylinder 141 needs to be controlled to drive the adjusting plate 142 to continue moving in the corresponding direction.

[0041] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0042] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A semi-trailer chassis structure with high load-bearing capacity, characterized in that, Including: a vehicle frame, a connecting frame for connecting the vehicle frame and a semi-trailer head, and a loading rack for loading and unloading materials; the vehicle frame is composed of a keel and cross beams fixedly installed on the keel; one end of the keel is fixedly installed with a tail beam seat, a rotating shaft is fixedly installed on the tail beam seat, a rotating plate is rotatably installed on the rotating shaft, a loading rack is fixedly installed on the rotating plate, a second hydraulic cylinder is rotatably installed on the loading rack, and the second hydraulic cylinder is rotatably installed on the tail beam seat; cover plates are fixedly installed on adjacent two groups of the cross beams; multiple groups of the cross beams are equidistantly installed on the keel, and the multiple groups of cross beams and the keel form a first support surface, and the surface of the loading rack in contact with the goods is a second support surface.

2. The semi-trailer chassis structure with high load-bearing capacity according to claim 1, characterized in that, a connecting beam is slidably connected to the keel, a support plate is fixedly installed on the inner wall of the connecting beam, a connecting hole is opened on the connecting beam, a clamping hole is opened on the keel, a support frame is fixedly installed on the cross beam, a fixing pin is slidably connected to the support frame, and one end of the fixing pin is provided with a spherical surface.

3. A semi-trailer chassis structure with high load-bearing capacity according to claim 1, characterized in that, a side beam is fixedly connected to the cross beam, a first hydraulic cylinder is fixedly installed on the cross beam, an adjusting plate is fixedly installed on the output shaft of the first hydraulic cylinder, a reinforcing beam is slidably connected to the adjusting plate, and a connecting piece is fixedly connected to the reinforcing beam.

4. The semi-trailer chassis structure with high load-bearing capacity according to claim 3, characterized in that, the connecting piece is fixedly connected to the side beam, and the adjusting plate is slidably connected to the side beam.

5. A semi-trailer chassis structure with high load-bearing capacity as described in claim 3, characterized in that, a chute is opened on the reinforcing beam, a first spring is fixedly installed on the chute, a slider is fixedly installed on the first spring, a rotating seat is fixedly installed on the slider, a connecting rod is rotatably installed on the rotating seat, and the connecting rod is rotatably connected to the loading rack.

6. A semi-trailer chassis structure with high load-bearing capacity according to claim 5, characterized in that, a push rod is fixedly installed on the slider, an airbag is fixedly installed on the chute, a hose is communicated with the airbag, one end of the hose is communicated with a telescopic member, and a support member is rotatably installed on the loading rack, and the telescopic end of the support member abuts against the support member.

7. The semi-trailer chassis structure with high load-bearing capacity according to claim 6, characterized in that, the slider is slidably installed in the chute, and the telescopic member is fixedly installed on the loading rack.

8. The semi-trailer chassis structure with high load-bearing capacity according to claim 3, characterized in that a clamping groove is opened on the adjusting plate, a sliding sleeve is slidably installed on the rotating shaft, a second spring is fixedly installed on the sliding sleeve, the second spring is fixedly connected to the rotating shaft, a guiding groove is opened on the rotating plate, the guiding groove cooperates with the sliding sleeve, and a clamping block is fixedly installed at one end of the sliding sleeve.

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