Semi-trailer load-bearing frame structure and semi-trailer

Abstract

The invention belongs to the technical field of heavy-load transportation equipment, and discloses a semi-trailer-loaded frame structure and a semi-trailer. The semi-trailer-loaded frame structure includes: a longitudinal beam, which serves as the core load-bearing structure of the semi-trailer frame; a cross beam, which is connected to the inside of the longitudinal beam and is used to strengthen the local strength of the frame; a rib plate, which is connected to the outside of the longitudinal beam and is used to support objects; a placement box, which is connected to the longitudinal beam and is used to place objects; a light stand, which is connected to the longitudinal beam and is used for warning; an alarm, which is connected to the longitudinal beam and is used for warning; the present invention can enable the hydraulic rod to have the function of deflection adjustment angle. When facing complex terrain such as ramps and potholes, the support plate can actively adapt to the ground shape to avoid local suspension caused by ground undulations, ensure stable support of the support legs, and improve the applicability of the vehicle in scenarios such as unpaved roads and loading and unloading sites.

Description

Technical Field

[0001] The present invention belongs to the technical field of heavy-load transport equipment, and in particular relates to a semi-trailer load-bearing frame structure and a semi-trailer. Background Art

[0002] In the fields of logistics and heavy freight, semi-trailers have become a core piece of equipment in the land transportation system due to their efficient cargo carrying and transshipment capabilities. The load-bearing frame structure, as the "backbone" of the semi-trailer, directly determines the vehicle's load-bearing performance, driving stability, and service life. Its design and improvement have always been a focus of the industry.

[0003] As the logistics industry continues to demand higher levels of transport efficiency and cargo adaptability, semi-trailers are required to carry heavier and more diverse cargo (such as construction materials and industrial equipment) and adapt to complex road conditions (such as mountain slopes and bumpy roads). This requires a high-strength frame structure with a strong load-bearing capacity, while also achieving breakthroughs in lightweighting, fatigue resistance, and assembly flexibility to balance the contradiction between "heavy load requirements" and "fuel economy and operating costs."

[0004] At present, traditional semi-trailer load-bearing frames mostly adopt a frame structure of longitudinal beams + cross beams. Although it can meet basic load-bearing requirements, it has the following shortcomings in actual applications: the rear end of the frame is completely dependent on the tractor or hard contact with the ground for support. When loading and unloading heavy cargo, the frame is easily deformed due to uneven force, and it cannot adapt to the working condition of "trailers parked independently waiting for loading and unloading"; although some frames have additional tail-end supports, the supports and the frame are mostly rigidly connected vertically and cannot be deflected to adjust the angle. When the ground is uneven (such as ramps or potholes), the supports are difficult to fit the ground, or the distance from the ground is too small (even scratched), and the partial suspension causes support failure, reducing vehicle stability and support life. Summary of the Invention

[0005] The present invention addresses the problem in the prior art that the support legs are mostly rigidly connected to the frame, which cannot be deflected and adjusted. When the ground is uneven (such as ramps or potholes), the support legs have difficulty contacting the ground, or the distance from the ground is too small (even scratching), resulting in partial suspension, causing support failure, reducing vehicle stability and support leg life. The present invention proposes the following technical solutions:

[0006] A semi-trailer load-bearing frame structure includes: a longitudinal beam serving as a core load-bearing structure of the semi-trailer frame;

[0007] A crossbeam connected to the interior of the longitudinal beam for reinforcing the local strength of the frame;

[0008] Ribs connected to the outside of the longitudinal beams for supporting objects;

[0009] A placement box, connected to the longitudinal beam, for placing objects;

[0010] A light stand, connected to the longitudinal beam, for warning purposes;

[0011] An alarm, connected to the longitudinal beam, for warning purposes;

[0012] The rotation offset assembly includes: a positioning structure, a reset structure, a hydraulic rod, a support plate, a chain, a clamping plate and a hook;

[0013] The positioning structure drives the hydraulic rod to deflect through the reset structure, the support plate is connected to the hydraulic rod, and the support plate is connected to the hook through a chain and a clamping plate.

[0014] As a preferred embodiment of the above technical solution, the positioning structure includes:

[0015] a fixed plate connected to the longitudinal beam;

[0016] The triangular teeth are arranged on the outer side of the fixed disk and are evenly distributed along the bottom end of the inner wall of the fixed disk.

[0017] As a preferred embodiment of the above technical solution, the reset structure includes:

[0018] a circular ring connected to the fixed disk;

[0019] a limiting block connected to the fixed disk via the ring;

[0020] A rectangular plate connected to the circular ring via the limiting block;

[0021] a metal strip connected to the rectangular plate and located within the triangular teeth;

[0022] Two fixing rings are connected to the outside of the hydraulic rod;

[0023] A compression member connected to the fixing ring;

[0024] a connecting rod connected to the compression member, and driving the connecting rod to move via the compression member;

[0025] A guide rod connected to the connecting rod and used to cooperate with the clamping plate to drive the connecting rod to move;

[0026] A limiting rod is connected to the connecting rod.

[0027] As a preferred embodiment of the above technical solution, the reset structure further includes:

[0028] an arc-shaped bar connected to the limiting rod;

[0029] a fixed column connected to the arc-shaped bar;

[0030] The arc-shaped piece is connected to the fixing column and is arranged in the metal bar.

[0031] As a preferred embodiment of the above technical solution, anti-slip grooves are equidistantly provided on one end surface of the support plate, and the shape of the support plate is convex.

[0032] As a preferred embodiment of the above technical solution, the top edge of the guide rod is provided with an inclination angle, the middle of the clamping plate is provided with a circular hole, and the outer bottom of the guide rod is provided with a placement groove.

[0033] As a preferred embodiment of the above technical solution, a plurality of guide grooves are provided on the outer side of the limit block, the fixing column is located inside the guide groove, and the shape of the fixing column is L-shaped.

[0034] As a preferred embodiment of the above technical solution, the limiting rod is composed of a horizontal bar and a triangular bar, and the outer side of the triangular bar is in contact with the inner side of the triangular tooth.

[0035] A semitrailer comprises the above-mentioned semitrailer load-bearing frame structure.

[0036] The beneficial effects of the present invention are:

[0037] (1) The hydraulic rod has the function of deflection adjustment angle. When facing complex terrain such as slopes and potholes, the support plate can actively adapt to the ground shape to avoid partial suspension caused by ground undulations, ensure the stable support of the support legs, and improve the applicability of the vehicle in scenes such as unpaved roads and loading and unloading sites;

[0038] (2) Changing the distance between the support leg structure and the ground can prevent the support leg structure from accidentally contacting objects on the ground during vehicle operation, thereby avoiding potential safety hazards. In addition, the support plate can be effectively fixed to prevent the support plate from shifting during use, further enhancing the stability and reliability of the support leg structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The figure shows a schematic structural diagram of a semi-trailer load-bearing frame structure in Example 1;

[0040] Figure 2 The figure shows a bottom view of a semi-trailer load-bearing frame structure in Example 1;

[0041] Figure 3 The figure shows the installation structure diagram of the hydraulic rod in Example 1;

[0042] Figure 4 Shown is a schematic structural diagram of the positioning structure in Example 1;

[0043] Figure 5 The figure shows the installation structure diagram of the fixing ring in Example 1;

[0044] Figure 6Shown is Figure 5 Schematic diagram of the structure of area A;

[0045] Figure 7 Shown is a schematic structural diagram of the card board in Example 1.

[0046] In the figure: 1. longitudinal beam; 2. cross beam; 3. rib; 4. placement box; 5. lamp holder; 6. alarm; 7. positioning structure; 71. fixing plate; 72. triangular gear; 81. circular ring; 82. limit block; 83. rectangular plate; 84. metal bar; 85. fixing ring; 86. compression member; 87. connecting rod; 88. guide rod; 89. limit rod; 810. arc strip; 811. fixing column; 812. arc sheet; 9. hydraulic rod; 10. support plate; 11. chain; 12. clamping plate; 13. hook. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0048] Example 1

[0049] The present invention provides a semi-trailer load-bearing frame structure, such as Figures 1 to 7 As shown, it includes: a longitudinal beam 1, a cross beam 2, a rib 3, a placement box 4, a light holder 5, an alarm 6 and a rotation offset assembly; the longitudinal beam 1 serves as the core load-bearing structure of the semi-trailer frame; the cross beam 2 is connected to the inside of the longitudinal beam 1 to strengthen the local strength of the frame; the rib 3 is connected to the outside of the longitudinal beam 1 to support objects; the placement box 4 is connected to the longitudinal beam 1 to place objects; the light holder 5 is connected to the longitudinal beam 1 for warning purposes; the alarm 6 is connected to the longitudinal beam 1 for warning purposes; the rotation offset assembly includes: a positioning structure 7, a reset structure, a hydraulic rod 9, a support plate 10, a chain 11, a card plate 12 and a hook 13; the positioning structure 7 drives the hydraulic rod 9 to deflect through the reset structure, the support plate 10 is connected to the hydraulic rod 9, and the support plate 10 is connected to the hook 13 through the chain 11 and the card plate 12.

[0050] However, the legs are mostly rigidly connected to the frame, and cannot be deflected to adjust the angle. When the ground is uneven (such as slopes or potholes), the legs have difficulty contacting the ground, or the distance from the ground is too small (even scratching), causing partial suspension, resulting in support failure, reducing vehicle stability and leg life.

[0051] This structure is equipped with a rotation offset component, and is composed of a positioning structure 7, a reset structure, a hydraulic rod 9 and a support plate 10 to form a flexibly adjustable support leg structure. The core improvement is to enable the hydraulic rod 9 to have the function of deflection adjustment angle. When facing complex terrain such as slopes and potholes, the support plate 10 can actively adapt to the ground shape to avoid local suspension caused by ground undulations, ensure stable support of the support leg, and improve the applicability of the vehicle in scenarios such as unpaved roads and loading and unloading sites.

[0052] At the same time, with the help of the deflection of the hydraulic rod 9, the distance between the support leg structure and the ground is changed to prevent the support leg structure from accidentally contacting ground objects during the operation of the vehicle, thereby avoiding the safety hazards caused by this. In addition, the chain 11, the card plate 12 and the hook 13 cooperate with each other to effectively fix the support plate 10, avoiding the support plate 10 from shifting during use, and further enhancing the stability and reliability of the support leg structure.

[0053] When in use, the longitudinal beam 1, cross beam 2, rib plate 3, placement box 4, lamp holder 5 and alarm 6 are assembled to form a complete load-bearing frame structure. At this time, the longitudinal beam 1, cross beam 2, rib plate 3 and placement box 4 are assembled by welding, and the lamp holder 5 and alarm 6 are connected by bolts. Then the hydraulic rod 9 is deflected on the outside of the positioning structure 7 through the reset structure, so that the hydraulic rod 9 and the ground are tilted and enter the maximum tilt position (the tilt range is between 0-120 degrees, and the angles between the two sides and the positioning structure 7 are 60 degrees when the hydraulic rod 9 is perpendicular to the ground). At this time, the card plate 12 is pulled to separate the card plate 12 from the reset structure. At this time, the reset structure runs and the hydraulic rod 9 is clamped and fixed. Then the personnel drives the support plate 10 to deflect through the card plate 12 and the chain 11, and then the support plate 10 is rotated and fixed through the cooperation between the card plate 12 and the hook 13 to prevent the support plate 10 from swinging during the operation of the vehicle.

[0054] The cam 12 is connected with the support 14 at the rear of the vehicle, and the cam 13 is connected with the support 14 at the rear of the vehicle, and the cam 13 is connected with the support 14 at the rear of the vehicle.

[0055] like Figures 5 to 7 As shown, the reset structure includes: a circular ring 81, a circular ring 81, a limit block 82, a rectangular plate 83, a metal strip 84, a fixing ring 85, a compression member 86, a connecting rod 87, a guide rod 88, a limit rod 89, an arc strip 810, a fixing column 811 and an arc piece 812; the circular ring 81 is connected to the fixing plate 71; the limit block 82 is connected to the fixing plate 71 through the circular ring 81; the rectangular plate 83 is connected to the circular ring 81 through the limit block 82; the metal strip 84 is connected to the rectangular plate 83 and is located in the triangular tooth 72; the fixing ring 85 is connected to the outside of the hydraulic rod 9 and there are two of them in total; the compression piece 86 is connected to the fixed ring 85; the connecting rod 87 is connected to the compression piece 86, and the connecting rod 87 is driven to move by the compression piece 86; the guide rod 88 is connected to the connecting rod 87, and is used to cooperate with the clamping plate 12 to drive the connecting rod 87 to move; the limiting rod 89 is connected to the connecting rod 87, and the arc strip 810 is connected to the limiting rod 89; the fixing column 811 is connected to the arc strip 810; the arc sheet 812 is connected to the fixing column 811 and is arranged in the metal strip 84.

[0056] Since the hydraulic rod 9 needs to be fixed after deflection to prevent the hydraulic rod 9 from shaking due to mechanical vibration when the vehicle is running, the compression member 86, the connecting rod 87, the guide rod 88 and the limit rod 89 can be used to fix the hydraulic rod 9 after it is deflected to the target angle. Compared with the traditional rigid connection structure, the vibration resistance and stability are improved, and the loosening of the support leg connection and structural fatigue damage caused by shaking are effectively avoided;

[0057] In addition, the friction coefficient of the hydraulic rod 9 is increased by the rectangular plate 83 and the metal strip 84 during movement to prevent the hydraulic rod 9 from swinging rapidly. However, the metal strip 84 cannot be reset due to mechanical fatigue after long-term use, thereby reducing the effectiveness of the metal strip 84. For this reason, the metal strip 84 is squeezed under the action of the arc strip 810, the fixed column 811 and the arc sheet 812, so that the metal strip 84 is reset, reducing the maintenance cost and downtime risk caused by component failure, and ensuring the long-term stable operation of the support leg system.

[0058] During use, the hydraulic rod 9 is first deflected to a predetermined position (60 degrees). Then, the operator pulls the card plate 12 so that the card plate 12 separates along the outer side of the guide rod 88. At this time, the restoring force of the compression member 86 drives the connecting rod 87 to reset. When the connecting rod 87 is reset, it drives the guide rod 88 to reset, so that the guide rod 88 enters the inside of the triangular gear 72. Then, the connecting rod 87 drives the limiting rod 89 to move. At this time, the limiting rod 89 drives the arc piece 812 to squeeze the inside of the metal strip 84 through the arc strip 810 and the fixed column 811, so that the metal strip 84 is reset.

[0059] When the hydraulic rod 9 needs to be deflected, the clamping plate 12 is sleeved on the outside of the guide rod 88, so that the two guide rods 88 approach each other. When the guide rods 88 approach each other, the limiting rod 89 and the triangular tooth 72 are driven to separate through the connecting rod 87. At the same time, the limiting rod 89 drives the arc piece 812 and the metal strip 84 to separate through the arc strip 810 and the fixed column 811. Then, due to the action of gravity, the hydraulic rod 9 drives the circular ring 81 to rotate inside the fixed disk 71 through the limiting block 82, and at this time, the limiting block 82 drives the metal strip 84 to move on the triangular tooth 72 of the fixed disk 71 through the rectangular plate 83, so that the metal strip 84 fits the inner wall of the fixed disk 71 and enters the inside of the triangular tooth 72, and then separates from the inside of the triangular tooth 72 and fits the inside of the fixed disk 71 again, thereby realizing the reciprocating motion of pressing and resetting the metal strip 84. This method uses the obstruction of the metal strip 84 to reduce the speed of the hydraulic rod 9 during the deflection and reset process, so that the hydraulic rod 9 deflects slowly.

[0060] Specifically, the circular ring 81 is sleeved on the outside of the fixed plate 71, and the outer surface of the circular ring 81 is welded with a limit block 82. Rectangular plates 83 are symmetrically welded on both sides of the limit block 82. A metal strip 84 is welded on one end face of the rectangular plate 83. The metal strip 84 is located inside the triangular gear 72 at the farthest distance from the limit block 82. Two fixed rings 85 are sleeved on the outside of the hydraulic rod 9. Multiple compression pieces 86 are symmetrically welded on the outside of the fixed ring 85. The same connecting rod 87 is welded between one end of the multiple compression pieces 86. The number of connecting rods 87 is set to two, and the number of compression pieces 86 is set to eight. A guide rod 88 is welded on the top of the two connecting rods 87. A limit rod 89 is welded on one end of the connecting rod 87. The top edge of the guide rod 88 is provided with an inclined angle. A circular hole is provided in the middle of the card plate 12. The guide rod 8 A placement groove is provided at the bottom of the outer side of 8, which is convenient for placing the card plate 12, and the inclination angle makes it convenient for the card plate 12 to enter the outside of the limit rod 89. Arc-shaped strips 810 are welded between the opposite surfaces of the two limit rods 89, and multiple fixing columns 811 are welded at one end of the arc-shaped strip 810. An arc-shaped piece 812 is welded at one end of the fixing column 811. Anti-slip grooves are equidistantly provided on one end surface of the support plate 10. The shape of the support plate 10 is convex, which increases the friction coefficient between the support plate 10 and the ground. Several guide grooves are provided on the outside of the limit block 82, and the fixing column 811 is located inside the guide groove. The shape of the fixing column 811 is L-shaped, which is used to limit the fixing column 811. The limit rod 89 is composed of a horizontal bar and a triangular bar. The outer side of the triangular bar is in contact with the inner side of the triangular tooth 72, which is used to limit the hydraulic rod 9.

[0061] In the present application, the compression member 86 belongs to an elastic linear drive structure, specifically a spring telescopic rod.

[0062] like Figure 3 and Figure 4 As shown, the positioning structure 7 includes: a fixed plate 71 and triangular teeth 72; the fixed plate 71 is connected to the longitudinal beam 1; the triangular teeth 72 are arranged on the outside of the fixed plate 71 and are evenly distributed along the bottom end of the inner wall of the fixed plate 71. A circular groove is opened in the middle of the fixed plate 71, and a positioning groove is opened at the bottom end of the fixed plate 71. The circular ring 81 is located inside the circular groove, and the limit block 82 is located inside the positioning groove, which is used to limit the circular ring 81 and the limit block 82, and to limit the deflection amplitude of the limit block 82.

[0063] Example 2

[0064] The present invention provides a semi-trailer, comprising the above-mentioned semi-trailer load-bearing frame structure.

[0065] Working Principle: When in use, the longitudinal beam 1, cross beam 2, rib plate 3, storage box 4, lamp holder 5 and alarm 6 are assembled to form a complete load-bearing frame structure. The longitudinal beam 1, cross beam 2, rib plate 3 and storage box 4 are fixed by welding to ensure that the structure has high strength and stability and can withstand the complex loads during heavy-load transportation. The lamp holder 5 and alarm 6 are connected by bolts, which facilitates subsequent disassembly, maintenance and function upgrades, effectively reducing maintenance costs.

[0066] When the angle of the hydraulic rod 9 is adjusted, the card plate 12 and the chain 11 are first separated from the hook 13, and then the personnel put the card plate 12 on the outside of the guide rod 88 through the circular hole, and push the card plate 12 along the inclined groove at the top of the guide rod 88, so that the two guide rods 88 are close to each other. At this time, the compression member 86 is compressed under the action of the connecting rod 87, storing elastic potential energy, providing power for subsequent locking. Then, after the card plate 12 enters the outside of the placement groove of the guide rod 88, the placement groove is used to limit the card plate 12. At the same time, because the movement of the connecting rod 87 drives the limit rod 89 to move, the limit rod 89 separates from the triangular tooth 72 when it moves, and at the same time, the limit rod 89 drives the arc piece 812 and the metal strip 84 to separate through the arc strip 810 and the fixed column 811. Then, due to the action of gravity, the hydraulic rod 9 drives the ring 81 to rotate inside the fixed plate 71, and the rotation of the hydraulic rod 9 drives the metal strip 84 The center point is offset outward from the center of the triangular tooth 72 and contacts the edge of the triangular tooth 72. At this time, the metal strip 84 is compressed by the action of gravity and the extrusion of the triangular tooth 72, and then continues to move. When the metal strip 84 enters the inside of the next triangular tooth 72, it continues to move. When the metal strip 84 enters the middle of the triangular tooth 72, the extrusion force of the triangular tooth 72 on the metal strip 84 is reduced, causing the metal strip 84 to reset and move back and forth, thereby causing the metal strip 84 to be compressed and reset inside the triangular tooth 72 of the fixed plate 71. The reciprocating motion reduces the speed of the hydraulic rod 9 during the deflection and reset process, effectively avoiding the rigid impact caused by rapid reset, extending the service life of the hydraulic rod 9 and related components, and improving the reliability of the system. Then, the support plate 10 is attached to the ground, and then the hydraulic rod 9 is started. The bottom end of the hydraulic rod 9 supports the frame structure through the top end of the support plate 10 attached to the ground.

[0067] Finally, when the hydraulic rod 9 needs to be stored, the hydraulic rod 9 is first tilted to the maximum angle, and then the card plate 12 is pulled to separate the card plate 12 from the reset structure. At this time, the two limit rods 89 are moved away from each other under the action of the compression member 86, and the limit rod 89 is accurately inserted into the inside of the triangular tooth 72 to form a rigid locking structure, which effectively prevents the hydraulic rod 9 from shaking due to mechanical vibration during the operation of the vehicle, ensuring driving safety. Then, the support plate 10 is driven to deflect through the card plate 12 and the chain 11, and then the support plate 10 is fixed after rotation through the cooperation between the card plate 12 and the hook 13, to prevent the support plate 10 from swinging during the operation of the vehicle.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A semi-trailer load-bearing frame structure, characterized in that: include: Longitudinal beam (1), serving as the core load-bearing structure of the semi-trailer frame; A crossbeam (2) connected to the interior of the longitudinal beam (1) and used to strengthen the local strength of the frame; Ribs (3) connected to the outside of the longitudinal beam (1) and used to support objects; A placement box (4), connected to the longitudinal beam (1), for placing objects; A light frame (5) is connected to the longitudinal beam (1) and serves as a warning; An alarm (6) is connected to the longitudinal beam (1) and serves as a warning; The rotation offset assembly includes: a positioning structure (7), a reset structure, a hydraulic rod (9), a support plate (10), a chain (11), a clamping plate (12) and a hook (13); The positioning structure (7) drives the hydraulic rod (9) to deflect via the reset structure, the support plate (10) is connected to the hydraulic rod (9), and the support plate (10) is connected to the hook (13) via a chain (11) and a clamping plate (12); The positioning structure (7) comprises: A fixed plate (71) connected to the longitudinal beam (1); Triangular teeth (72) are arranged on the outside of the fixed disk (71) and are evenly distributed along the bottom end of the inner wall of the fixed disk (71); The reset structure includes: A circular ring (81) connected to the fixed disk (71); A limit block (82) connected to the fixed disk (71) via the ring (81); A rectangular plate (83) connected to the circular ring (81) via the stop block (82); a metal strip (84) connected to the rectangular plate (83) and located within the triangular teeth (72); A fixing ring (85) is connected to the outside of the hydraulic rod (9) and is provided in two numbers; A compression member (86) connected to the fixing ring (85); A connecting rod (87) is connected to the compression member (86), and drives the connecting rod (87) to move via the compression member (86); A guide rod (88) connected to the connecting rod (87) and used to cooperate with the clamping plate (12) to drive the connecting rod (87) to move; A limiting rod (89) connected to the connecting rod (87); An arc-shaped bar (810) connected to the limiting rod (89); A fixed column (811) connected to the arc-shaped bar (810); An arc-shaped piece (812) connected to the fixing column (811) and disposed within the metal strip (84); When adjusting the angle of the hydraulic rod (9), the card plate (12) is sleeved on the outside of the guide rod (88) through the circular hole, so that the two guide rods (88) are close to each other. At the same time, the limit rod (89) is driven to move when the connecting rod (87) moves. When the limit rod (89) moves, it separates from the triangular gear (72). At the same time, the limit rod (89) drives the arc piece (812) and the metal strip (84) to separate through the arc strip (810) and the fixed column (811). Due to the action of gravity, the hydraulic rod (9) drives the ring (81) to rotate inside the fixed plate (71), and the hydraulic rod (9) drives the center of the metal strip (84). The center point is offset outward from the center of the triangular tooth (72) and contacts the edge of the triangular tooth (72). The metal strip (84) is compressed by gravity and the extrusion of the triangular tooth (72), and then continues to move. The metal strip (84) enters the inside of the next triangular tooth (72). At this time, it continues to move. When the metal strip (84) enters the middle of the triangular tooth (72), the extrusion force of the triangular tooth (72) on the metal strip (84) is reduced, causing the metal strip (84) to reset and move back and forth, so that the metal strip (84) performs a reciprocating motion of compression and reset inside the triangular tooth (72) of the fixed disk (71).

2. A semi-trailer load-bearing frame structure according to claim 1, characterized in that: Anti-slip grooves are equidistantly provided on one end surface of the support plate (10), and the shape of the support plate (10) is convex.

3. The semi-trailer load-bearing frame structure according to claim 2, characterized in that: The top edge of the guide rod (88) is provided with an inclined angle, the middle of the clamping plate (12) is provided with a circular hole, and the outer bottom of the guide rod (88) is provided with a placement groove.

4. The semi-trailer load-bearing frame structure according to claim 3, characterized in that: A plurality of guide grooves are provided on the outside of the limit block (82), and the fixing column (811) is located inside the guide groove. The fixing column (811) is L-shaped.

5. The semi-trailer load-bearing frame structure according to claim 4, characterized in that: The limiting rod (89) is composed of a horizontal bar and a triangular bar, and the outer side of the triangular bar is in contact with the inner side of the triangular tooth (72).

6. A semi-trailer, characterized in that: It includes the semi-trailer load-bearing frame structure described in claim 5.

Images