Multifunctional anti-rollover frame for semitrailer

Abstract

The invention relates to the technical field of semitrailer frames, in particular to a multifunctional anti-rollover frame for a semitrailer, which comprises a semitrailer frame body, a dragging hook fixed with a semitrailer head is fixed at one end of the semitrailer frame body, and a fixing seat is fixed at the bottom of the semitrailer frame body. A balance weight device for changing the gravity center of the semitrailer frame body is arranged below the fixing base, and an adjusting device for adjusting the balance weight device is further arranged above the fixing base. Through cooperation of the adjusting device, the balance weight device, the transmission mechanism, the positioning mechanism, the traction mechanism and other structures, the overall center of the sliding rod and the balance weight cylinder is changed, the safety of the semitrailer during unloading is improved, the limitation of a traditional supporting leg under the complex road condition is avoided by dynamically adjusting the gravity center, and the safety of the semitrailer is improved. And the maintenance cost and the operation complexity can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of semi-trailer frames, and particularly to a multi-functional anti-rollover frame for semi-trailers. Background Art

[0002] A semi-trailer is a trailer with axles placed behind the center of gravity of the vehicle and equipped with a coupling device that can transfer horizontal and vertical forces to the tractor. It is a heavy transportation vehicle connected to the semi-trailer head through a kingpin. The semi-trailer frame is a key component of the semi-trailer. The semi-trailer frame is mainly used to support and carry various goods, such as coal, ore, steel, wood, containers, etc. Different types of goods and transportation requirements will affect the design and structure of the frame. The semi-trailer frame can not only carry the weight of the goods and the body, but also ensure the driving stability and safety of the vehicle.

[0003] There are certain safety hazards when a semi-trailer unloads goods from the side. When the goods inside the carriage are concentrated on one side of the carriage, it will cause the center of gravity of the semi-trailer carriage to shift. This shift in the center of gravity will make the vehicle prone to losing balance during the unloading process, thereby increasing the risk of rollover. Although the existing semi-trailer frames improve the stability of the frame by increasing the frame support legs, too many support legs will also increase the vehicle's own weight, reduce the vehicle's mobility and cargo capacity, and at the same time increase the maintenance cost and operation complexity. Moreover, when the support legs are used on uneven roads, muddy roads or roads with a lot of stones, the support effect of the legs will be greatly reduced and cannot provide stable support. Therefore, we propose a multi-functional anti-rollover frame for semi-trailers. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a multi-functional anti-rollover frame for semi-trailers.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A multi-functional anti-rollover frame for semi-trailers, comprising: a semi-trailer frame body, one end of the semi-trailer frame body is fixed with a towing hook fixed to the semi-trailer head, a fixed seat is fixed at the bottom of the semi-trailer frame body, a weight device for changing the center of gravity of the semi-trailer frame body is arranged below the fixed seat, and an adjusting device for adjusting the weight device is also arranged above the fixed seat;

[0007] The adjusting device includes a transmission mechanism installed below the semi-trailer carriage. A positioning mechanism for limiting the transmission mechanism is arranged below the transmission mechanism. The transmission mechanism is connected to a counterweight device. The positioning mechanism is installed inside a fixed seat. The semi-trailer carriage drives the transmission mechanism to swing on the top of the positioning mechanism, so that the transmission mechanism drives the counterweight device to move, changing the center of gravity of the counterweight device, thereby changing the center of gravity of the semi-trailer frame body through the counterweight device to prevent the semi-trailer from tipping over.

[0008] The counterweight device includes a positioning rod arranged below the fixed seat. A number of counterweight cylinders for storing counterweight blocks are arranged on both sides of the positioning rod. A traction mechanism is arranged between the positioning rod and the carriage connecting plate. The carriage connecting plate drives the traction mechanism to move, so that the traction mechanism drives the counterweight cylinders to move, and the counterweight cylinders drive the counterweight blocks to move, thereby changing the overall center of gravity of the semi-trailer frame body through the counterweight blocks inside the counterweight cylinders.

[0009] As a preferred technical solution of the present invention, the positioning mechanism includes a support cylinder fixed on the fixed seat. A number of air springs for buffering the pressure generated by the transmission mechanism are arranged on the top of the support cylinder. A plug rod is fixed on the top of the support cylinder, and a lifting plate is fixed on the top of the plug rod. Two support plates for supporting the transmission mechanism are fixed on the top of the lifting plate. The transmission mechanism is arranged on the upper half of the two support plates. The transmission mechanism pushes the support plates to drive the lifting plate to move downward, so that the lifting plate drives the plug rod to move downward, and the lifting plate squeezes the air springs to buffer the pressure generated on the lifting plate.

[0010] As a preferred technical solution of the present invention, the transmission mechanism includes a transmission plate installed inside the semi-trailer frame body and a force-bearing wheel rotatably installed between two support plates. Two carriage connecting plates are fixed at both ends of the transmission plate, and a number of carriage hooks for facilitating the fixation with the trailer carriage are provided on each of the two carriage connecting plates. A transmission disc is fixed at the bottom of the transmission plate, and two push plates are symmetrically fixed at the bottom of the transmission disc. Two fixing rods are provided between the support cylinder and the transmission disc. The force-bearing wheel is arranged between the two push plates, and the transmission disc is rotatably installed between the two fixing rods. By driving one of the carriage hooks to move upward by the trailer carriage, one of the carriage hooks drives one of the carriage connecting plates to move upward, the carriage connecting plate drives the transmission plate to change from a vertical state to a horizontal state, the transmission plate drives the transmission disc to rotate around the outer wall of the fixing rod, the transmission disc drives the push plate to rotate, the push plate pushes the force-bearing wheel to move downward, the force-bearing wheel drives the lifting plate to move downward through the support plate, the lifting plate drives the insertion rod to move downward. At the same time, the carriage connecting plate drives the counterweight cylinder to move through the traction mechanism, and the counterweight cylinder drives the counterweight block installed inside it to move, thereby changing the overall center of gravity of the semi-trailer frame body, moving the center of gravity of the semi-trailer frame body to the side where the trailer carriage rises, and increasing the stability of the semi-trailer frame body.

[0011] As a preferred technical solution of the present invention, the traction mechanism includes a sliding rod inserted on the positioning rod, counterweight cylinders are fixed at both ends of the sliding rod, and a traction rope for driving the sliding rod to move is provided between the sliding rod and the carriage connecting plate. The carriage connecting plate drives the traction rope to move, the traction rope drives the sliding rod to move, and the sliding rod drives the counterweight cylinder to move.

[0012] As a preferred technical solution of the present invention, a support column is further fixed on the positioning rod, an extension plate is fixed at the top of the support column, pulleys are rotatably installed at both ends of the extension plate, the top of the traction rope is connected to the carriage connecting plate, and the bottom of the traction rope is connected to the sliding rod after passing around the pulley.

[0013] As a preferred technical solution of the present invention, a clamping plate is fixed on the sliding rod, a second mounting ring for fixing the traction rope is arranged at the top of the clamping plate, a rope-tying plate is fixed on the side of the carriage connecting plate, the carriage connecting plate drives the traction rope to move through the rope-tying plate, the traction rope drives the second mounting ring to move, the second mounting ring drives the clamping plate to move, the clamping plate drives the sliding rod to move, and the pulley limits the traction rope, so that the part of the lower half of the traction rope connected to the second mounting ring forms an inclined angle, thereby increasing the moving distance of the sliding rod.

[0014] As a preferred technical solution of the present invention, a first mounting ring is fixed to the bottom of the car connecting plate, and a support leg is inserted into the fixing seat. The bottom of the support leg passes through the fixing seat and extends to the bottom of the fixing seat, and a steel rope is arranged between the support leg and the first mounting ring. When one end of the transmission plate moves downward, the transmission plate drives the car connecting plate to move downward, so that the car connecting plate drives the first mounting ring to move downward, so that the steel rope is in a relaxed state, and the support leg moves downward under the influence of gravity, so that the bottom of the support leg contacts the ground, so that the support leg supports the semi-trailer frame body, thereby increasing the supporting force of the semi-trailer frame body, and further increasing the stability of the semi-trailer frame body.

[0015] As a preferred technical solution of the present invention, a clamping ring is fixed to the outside of the supporting leg, a supporting seat is also fixed to the bottom of the supporting leg, and a plurality of ground nails are provided on the outer wall of the supporting seat. The clamping ring can not only limit the supporting leg, but also prevent the impact force generated when the supporting leg is lowered from damaging the fixing seat. At the same time, the ground nails can be used to increase the stability of the supporting seat, thereby increasing the stability of the supporting leg when it contacts the ground.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] 1. By coordinating the adjustment device, counterweight device, transmission mechanism, positioning mechanism and traction mechanism, the center of the slide bar and the counterweight cylinder is changed, which not only improves the safety of the semi-trailer during unloading, but also avoids the limitations of traditional outriggers under complex road conditions by dynamically adjusting the center of gravity, and can also reduce maintenance costs and operational complexity;

[0018] 2. Through the cooperation of the car body connecting plate, transmission plate, transmission disc, steel rope and support leg, the bottom of the support leg is in contact with the ground, so that the support leg is firmly inserted into the ground, providing additional support force, thereby increasing the support force of the semi-trailer frame body;

[0019] 3. The pulley is used to limit the traction rope so that the lower half of the traction rope and the part connected to the second mounting ring form an inclined angle, so that the slide bar can cover a larger range when moving, thereby more effectively adjusting the center of gravity position of the frame, enhancing the stability of the frame, reducing the shaking caused by uneven road surface or unbalanced loading of goods, and further improving the safety of the vehicle when unloading;

[0020] 4. Using the baffle rod as a support can not only reduce the overall weight of the weight cylinder, but also enable the weight plate to be quickly placed inside the weight cylinder, while also enabling local materials to be used, thereby improving the convenience of the device;

[0021] 5. The snap ring can not only limit the supporting leg, but also absorb part of the impact force when the supporting leg descends, thereby protecting the fixed seat from damage, not only improving the service life of the supporting leg, but also enhancing the stability of the semi-trailer during unloading;

[0022] 6. On uneven, muddy or gravelly ground, the ground nails can penetrate into the ground to provide stable support. The use of ground nails can also reduce the shaking of the vehicle during unloading, further improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0024] Figure 2 is a schematic structural diagram of the adjusting device of the present invention;

[0025] Figure 3 is a schematic structural diagram of the transmission plate of the present invention;

[0026] Figure 4 is a schematic structural diagram of the fixed rod of the present invention;

[0027] Figure 5 is a schematic structural diagram of the support cylinder of the present invention;

[0028] Figure 6 is a schematic structural diagram of the lifting plate of the present invention;

[0029] Figure 7 is a schematic structural diagram of the carriage connecting plate of the present invention;

[0030] Figure 8 is a schematic structural diagram of the extension plate of the present invention;

[0031] Figure 9 For the present invention Figure 8 is a partial enlarged structural diagram at A in;

[0032] Figure 10 is a schematic structural diagram of the first mounting ring of the present invention;

[0033] Figure 11 is a schematic structural diagram of the positioning rod of the present invention;

[0034] Figure 12 is a schematic structural diagram of the supporting leg of the present invention;

[0035] Figure 13 is a schematic structural diagram of the support seat of the present invention;

[0036] Figure 14 is a schematic structural diagram of the snap ring of the present invention.

[0037] Wherein: 1. Semi-trailer frame body; 2. Towing hook; 3. Adjusting device; 4. Counterweight device; 5. Fixed seat; 6. Steel rope; 7. Support leg; 8. Support seat; 9. Ground nail; 10. Snap ring; 301. Support cylinder; 302. Transmission plate; 303. Carriage connecting plate; 304. Carriage hook; 305. Fixed rod; 306. Transmission disc; 307. Pusher plate; 308. Load-bearing wheel; 309. Lifting plate; 310. Air spring; 311. Insert rod; 312. Support plate; 313. First mounting ring; 314. Tie rope plate; 401. Positioning rod; 402. Slide rod; 403. Counterweight cylinder; 404. Clamping plate; 405. Support column; 406. Extension plate; 407. Pulley; 408. Second mounting ring; 409. Towing rope. Detailed implementation manner

[0038] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative labor all belong to the protection scope of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments can all be obtained from commercial channels unless otherwise specified.

[0039] Embodiment: The present invention provides a Figure 1 shown multifunctional anti-rollover frame for semi-trailer, including: a semi-trailer frame body 1, and a towing hook 2 fixed to one end of the semi-trailer frame body 1 and fixed to the semi-trailer head.

[0040] As can be seen from the above, during use, the semi-trailer frame body 1 is connected to the semi-trailer head through the towing hook 2, and the semi-trailer frame body 1 is moved to a specified position through the semi-trailer head. When it is necessary to unload the goods on the side of the semi-trailer carriage, one end of the semi-trailer carriage is pushed upward by an electric hydraulic rod, so that the goods inside the semi-trailer carriage are unloaded from the side of the semi-trailer carriage.

[0041] Refer to Figures 1 - 11 shown, a fixed seat 5 is fixed to the bottom of the semi-trailer frame body 1, a counterweight device 4 for changing the center of gravity of the semi-trailer frame body 1 is arranged below the fixed seat 5, and an adjusting device 3 for adjusting the counterweight device 4 is also arranged above the fixed seat 5;

[0042] The adjusting device 3 includes a transmission mechanism installed below the semi-trailer carriage. A positioning mechanism for limiting the transmission mechanism is arranged below the transmission mechanism. The transmission mechanism is connected to the counterweight device 4. The positioning mechanism is installed inside the fixed seat 5. The semi-trailer carriage drives the transmission mechanism to swing on the top of the positioning mechanism, so that the transmission mechanism drives the counterweight device 4 to move, changing the center of gravity of the counterweight device 4, and thus changing the center of gravity of the semi-trailer frame body 1 through the counterweight device 4 to prevent the semi-trailer from tipping over.

[0043] The counterweight device 4 includes a positioning rod 401 arranged below the fixed seat 5. A number of counterweight cylinders 403 for storing counterweight blocks are arranged on both sides of the positioning rod 401. A traction mechanism is arranged between the positioning rod 401 and the carriage connecting plate 303. The carriage connecting plate 303 drives the traction mechanism to move, so that the traction mechanism drives the counterweight cylinders 403 to move, and the counterweight cylinders 403 drive the counterweight blocks to move, thereby changing the overall center of gravity of the semi-trailer frame body 1 through the counterweight blocks inside the counterweight cylinders 403.

[0044] The positioning mechanism includes a support cylinder 301 fixed on the fixed seat 5. A number of air springs 310 for buffering the pressure generated by the transmission mechanism are arranged on the top of the support cylinder 301. A plug rod 311 is fixed on the top of the support cylinder 301. A lifting plate 309 is fixed on the top of the plug rod 311. Two support plates 312 for supporting the transmission mechanism are fixed on the top of the lifting plate 309. The transmission mechanism is arranged on the upper half of the two support plates 312. The transmission mechanism pushes the support plate 312 to drive the lifting plate 309 to move downward, so that the lifting plate 309 drives the plug rod 311 to move downward, and the lifting plate 309 squeezes the air spring 310 to buffer the pressure generated by the lifting plate 309.

[0045] The transmission mechanism includes a transmission plate 302 installed inside the semi-trailer frame body 1 and a force-bearing wheel 308 rotatably installed between two support plates 312. Two carriage connecting plates 303 are fixed at both ends of the transmission plate 302. A number of carriage hooks 304 for facilitating fixation with the trailer carriage are provided on both carriage connecting plates 303. A transmission disc 306 is fixed at the bottom of the transmission plate 302. Two push plates 307 are symmetrically fixed at the bottom of the transmission disc 306. Two fixing rods 305 are provided between the support cylinder 301 and the transmission disc 306. The force-bearing wheel 308 is arranged between the two push plates 307, and the transmission disc 306 is rotatably installed between the two fixing rods 305. By driving one of the carriage hooks 304 to move upward by the trailer carriage, one of the carriage hooks 304 drives one of the carriage connecting plates 303 to move upward, the carriage connecting plate 303 drives the transmission plate 302 to change from a vertical state to a horizontal state, the transmission plate 302 drives the transmission disc 306 to rotate around the outer wall of the fixing rod 305, the transmission disc 306 drives the push plates 307 to rotate, the push plates 307 push the force-bearing wheel 308 to move downward, the force-bearing wheel 308 drives the lifting plate 309 to move downward through the support plate 312, the lifting plate 309 drives the insertion rod 311 to move downward. At the same time, the carriage connecting plate 303 drives the counterweight cylinder 403 to move through the traction mechanism, and the counterweight cylinder 403 drives the counterweight block installed inside it to move, thereby changing the overall center of gravity of the semi-trailer frame body 1, moving the center of gravity of the semi-trailer frame body 1 to the side where the trailer carriage rises, and increasing the stability of the semi-trailer frame body 1.

[0046] The traction mechanism includes a sliding rod 402 inserted on the positioning rod 401. Counterweight cylinders 403 are fixed at both ends of the sliding rod 402. A traction rope 409 for driving the sliding rod 402 to move is provided between the sliding rod 402 and the carriage connecting plate 303. The carriage connecting plate 303 drives the traction rope 409 to move, the traction rope 409 drives the sliding rod 402 to move, the sliding rod 402 drives the counterweight cylinder 403 to move. A plurality of blocking rods are provided on the counterweight cylinder 403. By using the blocking rods as supports, not only can the overall weight of the counterweight cylinder 403 be reduced, but also local materials can be used to improve the convenience of the device.

[0047] A support column 405 is also fixed on the positioning rod 401. An extension plate 406 is fixed at the top of the support column 405. Pulleys 407 are rotatably installed at both ends of the extension plate 406. The top of the traction rope 409 is connected to the carriage connecting plate 303, and the bottom of the traction rope 409 is connected to the sliding rod 402 after passing around the pulley 407.

[0048] By adopting the above technical solutions:

[0049] During use, the trailer carriage drives one of the carriage hooks 304 to move upward, causing one of the carriage hooks 304 to drive one of the carriage connecting plates 303 to move upward, causing the carriage connecting plate 303 to drive the transmission plate 302 to change from a vertical state to a horizontal state, causing the transmission plate 302 to drive the transmission disc 306 to rotate around the outer wall of the fixed rod 305. The carriage connecting plate 303 drives the towing rope 409 to move through the rope tying plate 314, causing the towing rope 409 to drive the second mounting ring 408 to move, causing the second mounting ring 408 to drive the clamping plate 404 to move, causing the clamping plate 404 to drive the sliding rod 402 to move horizontally, and the sliding rod 402 drives the counterweight cylinder 403 to move, causing the counterweight block inside the counterweight cylinder 403 to move, changing the center of the entire sliding rod 402 and counterweight cylinder 403, thereby changing the overall center of gravity of the semi-trailer frame body 1, causing the center of gravity of the semi-trailer frame body 1 to move towards the side where the trailer carriage rises, increasing the stability of the semi-trailer frame body 1.

[0050] Secondly, as shown in Figure 12 , Figure 13 and Figure 14 A first mounting ring 313 is fixed to the bottom of the carriage connecting plate 303. A support leg 7 is also inserted into the fixed seat 5. The bottom of the support leg 7 passes through the fixed seat 5 and extends below the fixed seat 5. A steel rope 6 is provided between the support leg 7 and the first mounting ring 313. When one end of the transmission plate 302 moves downward, the transmission plate 302 drives the carriage connecting plate 303 to move downward, causing the carriage connecting plate 303 to drive the first mounting ring 313 to move downward, causing the steel rope 6 to be in a slack state. The support leg 7 moves downward under the influence of gravity, causing the bottom of the support leg 7 to contact the ground, thereby enabling the support leg 7 to support the semi-trailer frame body 1, thereby increasing the supporting force of the semi-trailer frame body 1 and further increasing the stability of the semi-trailer frame body 1.

[0051] By adopting the above technical solutions:

[0052] During use, the trailer carriage drives one of the carriage hooks 304 to move upward, causing one of the carriage hooks 304 to drive one of the carriage connecting plates 303 to move upward, causing the carriage connecting plate 303 to drive the transmission plate 302 to change from a vertical state to a horizontal state, causing the transmission plate 302 to drive the transmission disc 306 to rotate around the outer wall of the fixed rod 305, causing the transmission disc 306 to drive the push plate 307 to rotate, causing the push plate 307 to push the force-receiving wheel 308 to move downward. At the same time, the carriage connecting plate 303 drives the first mounting ring 313 to move downward, causing the steel rope 6 to be in a slack state. The support leg 7 moves downward under the influence of gravity, causing the bottom of the support leg 7 to contact the ground, thereby enabling the support leg 7 to support the semi-trailer frame body 1, thereby increasing the supporting force of the semi-trailer frame body 1 and further increasing the stability of the semi-trailer frame body 1.

[0053] Again, refer to Figure 2 , Figure 3 , Figure 8 and Figure 9 As shown, a clamping plate 404 is fixed on the sliding rod 402. A second mounting ring 408 for fixing the towing rope 409 is arranged at the top of the clamping plate 404. A rope-fastening plate 314 is fixed on the side of the carriage connecting plate 303. The carriage connecting plate 303 drives the towing rope 409 to move through the rope-fastening plate 314, so that the towing rope 409 drives the second mounting ring 408 to move, the second mounting ring 408 drives the clamping plate 404 to move, and the clamping plate 404 drives the sliding rod 402 to move. The towing rope 409 is limited by a pulley 407, so that the part of the lower half of the towing rope 409 connected to the second mounting ring 408 forms an inclined angle, thereby increasing the moving distance of the sliding rod 402.

[0054] By adopting the above technical solution:

[0055] During use, the towing rope 409 is limited by the pulley 407, so that the part of the lower half of the towing rope 409 connected to the second mounting ring 408 forms an inclined angle, thereby increasing the moving distance of the sliding rod 402.

[0056] Finally, refer to Figure 13 and Figure 14 As shown, a clamping ring 10 is fixed on the outside of the support leg 7. A support seat 8 is also fixed at the bottom of the support leg 7. A plurality of ground nails 9 are arranged on the outer wall of the support seat 8. The clamping ring 10 can not only limit the support leg 7, but also prevent the impact force generated when the support leg 7 descends from damaging the fixed seat 5. At the same time, the ground nails 9 are used to increase the stability of the support seat 8, and further increase the stability when the support leg 7 contacts the ground.

[0057] By adopting the above technical solution:

[0058] During use, the clamping ring 10 can not only limit the support leg 7, but also prevent the impact force generated when the support leg 7 descends from damaging the fixed seat 5. At the same time, the ground nails 9 are used to increase the stability of the support seat 8, and further increase the stability when the support leg 7 contacts the ground.

[0059] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to this. Various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A multifunctional anti-rollover frame for a semitrailer, comprising: A semitrailer frame body (1), one end of the semitrailer frame body (1) is fixed with a towing hook (2) fixed to the front of the semitrailer, characterized in that a fixing seat (5) is fixed at the bottom of the semitrailer frame body (1), a counterweight device (4) for changing the center of gravity of the semitrailer frame body (1) is arranged below the fixing seat (5), and an adjustment device (3) for adjusting the counterweight device (4) is also arranged above the fixing seat (5); The adjusting device (3) comprises a transmission mechanism installed below the semi-trailer compartment, and a positioning mechanism for limiting the transmission mechanism is provided below the transmission mechanism; The counterweight device (4) comprises a positioning rod (401) arranged below the fixing seat (5), a plurality of counterweight cylinders (403) for storing counterweight blocks are arranged on both sides of the positioning rod (401), and a traction mechanism is arranged between the positioning rod (401) and the carriage connecting plate (303).

2. The multifunctional anti-rollover frame for a semitrailer according to claim 1, characterized in that: The positioning mechanism comprises a support tube (301) fixed on a fixing seat (5); a plurality of air springs (310) are arranged at the top of the support tube (301) for buffering the pressure generated by the transmission mechanism; a plug rod (311) is fixed at the top of the support tube (301); a lifting plate (309) is fixed at the top of the plug rod (311); two support plates (312) for supporting the transmission mechanism are fixed at the top of the lifting plate (309); and the transmission mechanism is arranged on the upper half of the two support plates (312).

3. The multifunctional anti-rollover frame for a semitrailer according to claim 1, characterized in that: The transmission mechanism comprises a transmission plate (302) installed inside the semi-trailer frame body (1) and a force-bearing wheel (308) rotatably installed between two support plates (312); two carriage connecting plates (303) are fixed at both ends of the transmission plate (302); a plurality of carriage hooks (304) are arranged on the two carriage connecting plates (303) for conveniently fixing with the trailer carriage; a transmission disc (306) is fixed at the bottom of the transmission plate (302); two push plates (307) are symmetrically fixed at the bottom of the transmission disc (306); two fixing rods (305) are arranged between the support cylinder (301) and the transmission disc (306); the force-bearing wheel (308) is arranged between the two push plates (307), and the transmission disc (306) is rotatably installed between the two fixing rods (305).

4. The multifunctional anti-rollover frame for a semitrailer according to claim 1, characterized in that: The traction mechanism comprises a sliding rod (402) inserted on a positioning rod (401), a counterweight cylinder (403) fixed at both ends of the sliding rod (402), and a traction rope (409) for driving the sliding rod (402) to move is arranged between the sliding rod (402) and the carriage connecting plate (303).

5. The multifunctional anti-rollover frame for a semitrailer according to claim 1, characterized in that: A support column (405) is also fixed on the positioning rod (401), an extension plate (406) is fixed on the top of the support column (405), and pulleys (407) are rotatably mounted on both ends of the extension plate (406).

6. The multifunctional anti-rollover frame for a semitrailer according to claim 4, characterized in that: A clamping plate (404) is fixed on the slide bar (402), a second mounting ring (408) for fixing a traction rope (409) is arranged on the top of the clamping plate (404), and a rope tying plate (314) is fixed on the side of the carriage connecting plate (303).

7. The multifunctional anti-rollover frame for a semitrailer according to claim 1, characterized in that: A first mounting ring (313) is fixed to the bottom of the carriage connecting plate (303), and a supporting leg (7) is inserted into the fixing seat (5). The bottom of the supporting leg (7) passes through the fixing seat (5) and extends to the bottom of the fixing seat (5), and a steel rope (6) is provided between the supporting leg (7) and the first mounting ring (313).

8. The multifunctional anti-rollover frame for a semitrailer according to claim 7, characterized in that: A clamping ring (10) is fixed to the outside of the support leg (7), a support seat (8) is also fixed to the bottom of the support leg (7), and a plurality of ground nails (9) are arranged on the outer wall of the support seat (8).

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