A frame for semi-trailer that is easy to replace

Abstract

The present invention relates to the technical field of semi-trailer frames, and in particular to a frame for a semi-trailer that is easy to replace, comprising a frame, two slots for placing movable components are provided on the frame, a limiting slot for inserting a positioning strip is provided at the bottom corresponding to each cargo compartment, a pulling component for pulling the movable plate is provided in two movable plates, a resetting component for driving the movable plate to reset is provided inside the opening of each receiving plate, a positioning component for limiting the two movable plates is provided on one side of the two movable plates, an extension component for extending the moving range of the receiving plate is provided at one end of each connecting plate, and a plurality of limiting components for fixing the two cargo compartments are provided on one side of the two cargo compartments. The present invention can reduce the influence of the cargo compartment on the maintenance of the frame when the frame is being repaired through the coordinated use of movable components, transmission components, pulling components, resetting components, positioning components, extension components and limiting components, thereby reducing labor costs, reducing the difficulty of maintenance, and making the maintenance of the frame more comprehensive.

Description

Technical Field

[0001] The invention relates to the technical field of semitrailer frames, in particular to a frame for a semitrailer which is easy to replace. Background Art

[0002] The frame is the main load-bearing structure of the semi-trailer. It supports the weight of the entire body and the cargo area, ensuring the stability and durability of the body. The frame enhances the overall strength of the body through specific design and material selection, helps to disperse the load and reduce the impact, and prolongs the service life of the semi-trailer. The frame of the semi-trailer is not only the skeletal structure of the body, but also plays an important role in safety, load-bearing capacity and functional diversity. In the prior art, the semi-trailer is composed of a frame, a cargo hold and a tractor. The tractor and the frame are connected by a fifth wheel device. The fifth wheel device of the semi-trailer is installed at the rear of the semi-trailer. There is a joint under the frame of the semi-trailer that cooperates with the fifth wheel. Through this joint, the semi-trailer can be closely combined with the tractor to ensure a stable connection; however, the semi-trailer needs to regularly check and repair whether the body frame has cracks, deformation or other structural damage. Since a cargo hold is provided above the frame, in this case, when the frame needs to be repaired and inspected, due to the large volume of the cargo hold, the cargo hold and the frame need to be separated for inspection when it needs to be repaired. This maintenance method often requires a large labor cost and is difficult to repair. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a frame for a semitrailer which is easy to replace.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a frame, a plurality of steel bars are fixedly connected to the frame, and a bolt block is fixedly connected to both ends of each steel bar, a plurality of wheels are arranged at the lower end of the frame, and there are two cargo compartments in total, a plurality of bolt plates are arranged on both sides of each cargo compartment, and the bolt plates are threadedly connected to the bolt blocks by bolts, and two slots for placing movable components are arranged on the frame; each movable component comprises: a right-angle plate, a receiving plate, a positioning strip, a connecting plate, two sliding strips, two movable plates, two threaded blocks, four connecting strips, two sliding blocks and a limiting plate; wherein the right-angle plate is L-shaped, the right-angle plate is fixed in the slot of the frame, the connecting plate is fixedly connected to the right-angle plate, and a sliding strip is arranged on both sides of the connecting plate The slide bar is trapezoidal, the receiving plate is inverted L-shaped, and the receiving plate corresponds to the right-angle plate. Two slots for slide bar insertion are arranged inside the upper end of the receiving plate. The two slide bars are correspondingly inserted into the two slots of the slide bar. The top of the receiving plate is fixedly connected to the positioning bar, and the limiting plate is fixed to one side of the right-angle plate. The side of the receiving plate away from the limiting plate is provided with an opening for placing the movable plate. Both are arranged inside the opening of the receiving plate. The two sides of each threaded block are respectively fixedly connected to the two connecting strips. The connecting strips on one side of the two threaded blocks are fixedly connected to the corresponding movable plates. The two sliders are respectively fixedly connected to the connecting strips on the side of the two threaded blocks away from the movable plate. The side of the limiting plate away from the receiving plate is provided with an active groove for connecting the connecting strip. The two sliders are inserted in the active groove of the limiting plate. A positioning strip for fixing the bolt sheet is provided on one side of the top of the plate close to the limiting plate, and a limiting groove for inserting the positioning strip is provided at the corresponding bottom of each cargo bin, and the positioning strip is inserted in the corresponding limiting groove at the bottom of the cargo bin, and each transmission assembly comprises: a threaded block, two oblique strips and a threaded column; wherein, one end of the right-angle plate is provided with two flat slots for inserting the bearing block, an oblique strip is fixed on the bottom of the bearing block and one side of the bearing block, and the bearing block is inserted into the flat slot of the right-angle plate through the two oblique strips, and a bearing for connection with the threaded column is provided on the bearing block, and a threaded groove is provided on the wheel, and the inner ring of the bearing on the bearing block is fixedly connected to the threaded column, and the corresponding ends of the two threaded blocks are respectively provided with semi-threaded openings, and when the two threaded blocks correspond, the two semi-threaded openings of the two threaded blocks The hole is threadedly connected to the threaded column, each movable plate is arc-shaped, and the arc-shaped ends of the two movable plates correspond to each other, and a pulling component for pulling the movable plate to move is provided in the two movable plates; the pulling component includes: two rope drums, two pull ropes, two winding columns and a baffle; wherein, two winding columns are fixed in the middle of the two rope drums, a baffle is fixed on the two winding columns, two pull ropes are respectively arranged on both sides of the winding columns, and the baffle separates the two pull ropes, the two pull ropes are both wound and connected to the two winding columns, one end of the two pull ropes is respectively fixedly connected to the corresponding rope drums, and the other ends of the two pull ropes are respectively fixedly connected to the two movable plates, the arc hole formed by the two movable plates is larger than the size of the rope drum, and a reset component for driving the movable plate to reset is provided inside the opening of each receiving plate;Each reset assembly includes: four baffles, four tension springs and four limit columns; wherein, the top and bottom of one side of the receiving plate with an opening are each provided with two circular holes, and the circular holes of the receiving plate are both connected with the opening of the receiving plate, four baffles are provided in the opening of the receiving plate, and the four baffles are respectively fixed on both sides of the two movable plates, four tension springs are provided inside the opening of the receiving plate, and the two ends of each tension spring are respectively fixed to the corresponding baffle and the inner wall of the opening of the receiving plate, and each tension spring is respectively sleeved on the corresponding limit column, and each limit column is respectively passed through the corresponding circular hole of the receiving plate and fixedly connected with the baffle , and the shape of the blocking strip is larger than the size of the circular hole of the receiving plate, and one side of the two moving plates is provided with a positioning assembly for limiting the two moving plates; the positioning assembly includes: a special-shaped block, a connecting column, two plug-in blocks, a fixing ring, two limiting strips and a plurality of plug-in strips; wherein the special-shaped block is a cross shape, the special-shaped block is fixedly connected to the receiving plate, an opening for movable connection of the connecting column is provided on the special-shaped block, the connecting column passes through the opening of the special-shaped block and is fixedly connected to a rope drum away from the threaded block, the fixing ring is fixed to one end of the connecting column, and the two plug-in blocks are fixed to the fixing ring accordingly, and each plug-in The blocks are provided with movable grooves for inserting a plurality of inserting strips, the plurality of inserting strips are respectively fixed on the two limit strips, the plurality of inserting strips are inserted into the movable grooves corresponding to the two inserting blocks, the limit strips are in the shape of a seven-character, the upper and lower ends of the special-shaped block are respectively provided with a square groove for inserting the limit strips, the two limit strips are respectively inserted into the two square grooves of the special-shaped block, and the end of each connecting plate away from the bearing block is provided with an extension component for extending the moving range of the receiving plate; each extension component includes: a connecting block, an extension plate, two top blocks, a plug column and a card plate; wherein, the connecting block One end of the plate away from the bearing block is fixedly connected to the connecting block, and one end of the right-angle plate away from the bearing block is provided with a transverse slot, the bottom of the growth plate is fixed to the card plate, and the card plate is inserted into the transverse slot of the right-angle plate, two slide bars are fixed on both sides of the top of the growth plate, and one side of the growth plate is provided with a buckle slot for docking with the connecting block, and the two top blocks are fixed in the bayonet slot of the growth plate, and the size of the two top blocks corresponds to the connecting block, and the connecting block is inserted in the buckle slot of the growth plate, and the two top blocks and the connecting block are provided with round slots for plugging in the plug-in column, and the plug-in column is inserted in the round slots of the two top blocks and the connecting block. ;

[0005] Preferably, through the coordinated use of the movable assembly, the transmission assembly, the pulling assembly, the resetting assembly, the positioning assembly and the extension assembly, when regular inspection and maintenance are required, the bolts connecting the bolt sheet and the bolt block are removed, the bearing block is plugged into the right-angle plate through the oblique strips, the growth plate and the connecting plate are fixed through the plugging column, and then the two limit strips are moved to drive the limit strips to leave the plugging state with the special-shaped block, the connecting column is rotated to drive the rope drum to rotate, and then the two pull ropes are wound around the rope drum and contracted to drive the two moving plates to move toward the position of the rope drum. Because the moving plate is fixedly connected to the threaded block, the movement of the two moving plates drives the threaded block to be threadedly connected to the threaded column, and the movement of the two moving plates drives the tension spring to stretch, and then the moving limit strip is restored The plug-in state of the limit bar and the special-shaped block is restored. Since the connecting plate is fixedly connected to the cargo warehouse, the threaded column is rotated to make the threaded block drive the connecting plate to move on the connecting plate, thereby driving the cargo warehouse on the connecting plate to leave the frame for inspection and maintenance. When the inspection is completed and it needs to be reset, the threaded column is rotated to move the cargo warehouse toward the position of the frame, and then the bolt sheet and the bolt block are connected through the bolt thread, the two limit bars are moved to drive the limit bars to leave the plug-in state with the special-shaped block, and the stretched tension spring rebounds to drive the two moving plates to reset, and then the limit bar is moved to restore the plug-in state of the limit bar and the special-shaped block, and then the bearing block is moved to release the plug-in state of the oblique bar and the right-angle plate, the plug column is pulled out, and the moving growth plate is released from the plug-in state with the connecting block.

[0006] As a preferred technical solution of the present invention, a plurality of limit assemblies for fixing the two cargo bins are provided on the corresponding sides of the two cargo bins; each limit assemblies comprises: a toothed bar, a spiral column, a gear column and a threaded ring; wherein, the spiral column and the gear column are respectively fixed on the two cargo bins, a gear hole and a circular opening are provided on the toothed bar, a gear is provided on the gear column, the gear hole of the toothed bar corresponds to the gear on the gear column, the spiral column and the gear column are respectively movably connected to the gear hole and the circular opening of the toothed bar, a threaded groove is provided on the end of the spiral column away from the cargo bin, and the threaded ring is threadedly connected to the threaded groove of the spiral column.

[0007] Preferably, the threaded ring is rotated through the limit assembly to release the threaded connection between the threaded ring and the spiral column, and then the toothed bar is pulled to release the gear on the gear column from the meshing state with the gear groove on the toothed bar, thereby separating the two cargo holds and enabling gradual inspection and maintenance of different positions of the skeleton.

[0008] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0009] Through the coordinated use of movable components, transmission components, pulling components, reset components, positioning components, extension components and limit components, the impact of the cargo warehouse on the maintenance skeleton can be reduced during maintenance, labor costs are reduced, the difficulty of maintenance is reduced, the maintenance efficiency is improved, and the maintenance of the skeleton is more comprehensive.

[0010] The cargo hold can be fully fixed by means of the limit assembly, and can be disassembled immediately when maintenance is required, so that the cargo hold can be fully fixed and convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention;

[0012] Figure 2 For the present invention Figure 1 Schematic diagram of the steel bar structure;

[0013] Figure 3 For the present invention Figure 2 Schematic diagram of the middle right angle plate structure;

[0014] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-section structure of the middle receiving plate;

[0015] Figure 5 For the present invention Figure 4 Schematic diagram of the structure of the middle limit plate;

[0016] Figure 6 For the present invention Figure 5 Schematic diagram of the structure of the middle thread block;

[0017] Figure 7 For the present invention Figure 6 Schematic diagram of the middle rope drum structure;

[0018] Figure 8 For the present invention Figure 4 Schematic diagram of the middle connecting plate structure;

[0019] Fig. 9 For the present invention Figure 5 Schematic diagram of the structure of the special-shaped block;

[0020] Fig.10 For the present invention Figure 1 Schematic diagram of the middle bolt piece structure.

[0021] Among them: 1. frame; 2. steel bar; 3. bolt block; 4. wheel; 5. right-angle plate; 6. bearing block; 7. receiving plate; 8. positioning strip; 9. connecting plate; 10. sliding strip; 11. moving plate; 12. stop bar; 13. tension spring; 14. limiting column; 15. special-shaped block; 16. threaded block; 17. connecting strip; 18. slider; 19. limiting plate; 20. connecting column; 21. rope drum; 22. pull rope; 23. winding column; 24. stop plate; 25. connecting block; 26. growth plate; 27. top block; 28. plug column; 29. ​​limiting strip; 30. plug strip; 31. plug block; 32. fixing ring; 33. cargo hold; 34. bolt sheet; 35. toothed strip; 36. spiral column; 37. gear column; 38. threaded ring; 39. oblique strip; 40. threaded column; 41. card plate. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0023] Embodiment: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, a framework for a semi-trailer that is easy to replace includes a framework 1, a plurality of steel bars 2 are fixedly connected to the framework 1, and a bolt block 3 is fixedly connected to both ends of each steel bar 2. A plurality of wheels 4 are arranged at the lower end of the framework 1. There are two cargo compartments 33 in total, and a plurality of bolt plates 34 are arranged on both sides of each cargo compartment 33. The bolt plates 34 are threadedly connected to the bolt blocks 3 by bolts. The framework 1 is provided with two slots for placing movable components; each movable component includes: a right-angle plate 5, a receiving plate 7, a positioning bar 8, a connecting plate 9, two sliding bars 10, two moving plates 11, two threaded blocks 16, four connecting bars 17, two sliding blocks 18 and a limiting plate 19; wherein the right-angle plate 5 is L-shaped, and the right-angle plate 5 is L-shaped. Fixed in the slot of the frame 1, the connecting plate 9 is fixedly connected to the right-angle plate 5, a slide bar 10 is provided on both sides of the connecting plate 9, the slide bar 10 is trapezoidal, the receiving plate 7 is inverted L-shaped, and the receiving plate 7 corresponds to the right-angle plate 5, and two slots for plugging the slide bar 10 are provided inside the upper end of the receiving plate 7, and the two slide bars 10 are correspondingly plugged into the two slots of the slide bar 10, the top of the receiving plate 7 is fixedly connected to the positioning bar 8, the limiting plate 19 is fixed to one side of the right-angle plate 5, and the side of the receiving plate 7 away from the limiting plate 19 is provided with an opening for placing the movable plate 11, both of which are arranged inside the opening of the receiving plate 7, and the two sides of each threaded block 16 are respectively fixedly connected to the two connecting strips 17, and the connecting strips 17 on one side of the two threaded blocks 16 are connected to the corresponding movable plate 11 is fixedly connected, two sliders 18 are fixedly connected to the connecting strip 17 on the side of the two threaded blocks 16 away from the movable plate 11, and a movable groove for plugging the connecting strip 17 is provided on the side of the limiting plate 19 away from the receiving plate 7. The two sliders 18 are plugged into the movable groove of the limiting plate 19. A positioning strip 8 for fixing the bolt sheet 34 is provided on the side of the top of the receiving plate 7 close to the limiting plate 19. A limiting groove for plugging the positioning strip 8 is provided at the bottom of each corresponding cargo bin 33. The positioning strip 8 is plugged into the corresponding limiting groove at the bottom of the cargo bin 33. Each transmission assembly includes: a threaded block 16, two oblique strips 39 and a threaded column 40; wherein, one end of the right-angle plate 5 is provided with two flat slots for plugging the bearing block 6, and the bottom of the bearing block 6 and the bearing block 6 are connected. A bevel bar 39 is fixed on one side of each of the wheels, and the bearing block 6 is plugged into the flat slot of the right-angle plate 5 through two bevel bars 39. A bearing for connecting with a threaded column 40 is provided on the bearing block 6, and a threaded groove is provided on the wheel 4. The inner ring of the bearing on the bearing block 6 is fixedly connected with the threaded column 40. The corresponding ends of the two threaded blocks 16 are respectively provided with semi-threaded openings, and when the two threaded blocks 16 correspond, the two semi-threaded openings of the two threaded blocks 16 are threadedly connected with the threaded column 40. Each movable plate 11 is arc-shaped, and the arc-shaped ends of the two movable plates 11 correspond to each other. A pulling component for pulling the movable plate 11 to move is provided in the two movable plates 11; the pulling component includes: two rope drums 21, two pull ropes 22, two winding columns 23 and a baffle 24;Among them, two winding columns 23 are fixed in the middle of the two rope drums 21, a baffle 24 is fixed on the two winding columns 23, two pull ropes 22 are respectively arranged on both sides of the winding columns 23, and the baffle 24 separates the two pull ropes 22, and the two pull ropes 22 are both wound and connected to the two winding columns 23, one end of the two pull ropes 22 is respectively fixedly connected to the corresponding rope drums 21, and the other ends of the two pull ropes 22 are respectively fixedly connected to the two moving plates 11, the arc hole formed by the two moving plates 11 is larger than the size of the rope drums 21, and a reset component for driving the moving plate 11 to reset is provided inside the opening of each receiving plate 7; each reset component includes: four baffle bars 12, four pull ropes 13, and a reset component for driving the moving plate 11 to reset. Spring 13 and four limit columns 14; wherein, the top and bottom of one side of the opening of the receiving plate 7 are each provided with two circular holes, and the circular holes of the receiving plate 7 are connected to the opening of the receiving plate 7, four baffles 12 are provided in the opening of the receiving plate 7, and the four baffles 12 are respectively fixed on both sides of the two movable plates 11, and four tension springs 13 are provided inside the opening of the receiving plate 7, and the two ends of each tension spring 13 are respectively fixed to the corresponding baffle 12 and the inner wall of the opening of the receiving plate 7, and each tension spring 13 is respectively sleeved on the corresponding limit column 14, and each limit column 14 passes through the corresponding circular hole of the receiving plate 7 and is fixedly connected to the baffle 12, and the shape of the baffle 12 is larger than the opening of the receiving plate 7. The size of the circular hole is 20 mm, and one side of the two moving plates 11 is provided with a positioning component for limiting the two moving plates 11; the positioning component includes: a special-shaped block 15, a connecting column 20, two plug-in blocks 31, a fixing ring 32, two limiting strips 29 and a plurality of plug-in strips 30; wherein the special-shaped block 15 is a cross shape, the special-shaped block 15 is fixedly connected to the receiving plate 7, and an opening for movable connection of the connecting column 20 is provided on the special-shaped block 15, and the connecting column 20 passes through the opening of the special-shaped block 15 and is fixedly connected to a rope drum 21 away from the threaded block 16, the fixing ring 32 is fixed to one end of the connecting column 20, and the two plug-in blocks 31 are fixed to the fixing ring 32 accordingly, and each plug-in block 31 are provided with movable grooves for inserting a plurality of inserting strips 30, a plurality of inserting strips 30 are respectively fixed on two limit strips 29, a plurality of inserting strips 30 are inserted into the movable grooves corresponding to the two inserting blocks 31, the limit strip 29 is in the shape of a seven, and a square groove for inserting the limit strip 29 is respectively provided at the upper and lower ends of the special-shaped block 15, and the two limit strips 29 are respectively inserted into the two square grooves of the special-shaped block 15, and an extension component for extending the moving range of the receiving plate 7 is provided at one end of each connecting plate 9 away from the bearing block 6; each extension component includes: a connecting block 25, an increasing plate 26, two top blocks 27, a plug column 28 and a clamping plate 41;Among them, one end of the connecting plate 9 away from the bearing block 6 is fixedly connected to the connecting block 25, and one end of the right angle plate 5 away from the bearing block 6 is provided with a transverse slot, the bottom of the growth plate 26 is fixed to the card plate 41, and the card plate 41 is inserted into the transverse slot of the right angle plate 5. Two slide bars 10 are fixed on both sides of the top of the growth plate 26, and one side of the growth plate 26 is provided with a snap groove for docking with the connecting block 25. Two top blocks 27 are fixed in the bayonet groove of the growth plate 26, and the size of the two top blocks 27 corresponds to that of the connecting block 25. The connecting block 25 is inserted into the snap groove of the growth plate 26, and the two top blocks 27 and the connecting block 25 are both provided with round slots for plugging in the plug-in column 28, and the plug-in column 28 is inserted in the round slots of the two top blocks 27 and the connecting block 25. ;

[0024] like Figure 1 and Fig.10 As shown, a skeleton for a semi-trailer that is easy to replace is provided with a plurality of limit assemblies for fixing the two cargo holds 33 on the corresponding side of the two cargo holds 33; each limit assemblies comprises: a toothed bar 35, a spiral column 36, a gear column 37 and a threaded ring 38; wherein the spiral column 36 and the gear column 37 are respectively fixed on the two cargo holds 33, a gear hole and a circular opening are provided on the toothed bar 35, a gear column 37 is provided with a gear, the gear hole of the toothed bar 35 corresponds to the gear on the gear column 37, the spiral column 36 and the gear column 37 are respectively movably connected to the gear hole and the circular opening of the toothed bar 35, a threaded groove is provided on the end of the spiral column 36 away from the cargo hold 33, and the threaded ring 38 is threadedly connected to the threaded groove of the spiral column 36.

[0025] Working principle:

[0026] When regular inspection and maintenance are required, the threaded ring 38 is rotated to release the threaded connection between the threaded ring 38 and the spiral column 36, and then the toothed bar 35 is pulled to release the gear on the gear column 37 from the meshing state with the gear groove on the toothed bar 35, thereby separating the two cargo compartments 33, removing the bolts connecting the bolt sheet 34 and the bolt block 3, plugging the bearing block 6 into the right-angle plate 5 through the inclined bar 39, fixing the growth plate 26 and the connecting plate 9 through the plug column 28, and then moving the two limit bars 29 to drive the limit bars 29 to leave the plug-in state with the special-shaped block 15, rotating the connecting column 20 to drive the rope drum 21 to rotate, and then the two pull ropes 22 are wound around the rope drum 21 and shrink, driving the two moving plates 11 to move toward the position of the rope drum 21, because the moving plate 11 is fixedly connected to the threaded block 16, and then the movement of the two moving plates 11 drives the threaded block 16 to be threadedly connected to the threaded column 40, and the movement of the two moving plates 11 drives the tension spring 13 to stretch, thereby moving The limit strip 29 restores the plug-in state of the limit strip 29 and the special-shaped block 15. Since the receiving plate 7 is fixedly connected to the cargo bin 33, the threaded column 40 is rotated to make the threaded block 16 drive the receiving plate 7 to move on the connecting plate 9, thereby driving the cargo bin 33 on the receiving plate 7 to leave the skeleton 1 for inspection and maintenance. When the inspection is completed and it needs to be reset, the threaded column 40 is rotated to move the cargo bin 33 toward the position of the skeleton 1, and then the bolt sheet 34 is connected to the bolt block 3 through the bolt thread, and the two limit strips 29 are moved to drive the limit strips 29 to leave the plug-in state with the special-shaped block 15, and the stretched tension spring 13 rebounds to drive the two moving plates 11 to reset, and then the limit strip 29 is moved to restore the plug-in state of the limit strip 29 and the special-shaped block 15, and then the bearing block 6 is moved to release the plug-in state of the inclined strip 39 and the right-angle plate 5, the plug column 28 is pulled out, and the moving growth plate 26 is released from the plug-in state with the connecting block 25, so that different positions of the skeleton 1 can be inspected and repaired step by step.

[0027] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A frame for a semi-trailer that is easy to replace, comprising a frame (1), a plurality of steel bars (2) being fixedly connected to the frame (1), a bolt block (3) being fixedly connected to both ends of each steel bar (2), a plurality of wheels (4) being arranged at the lower end of the frame (1), a total of two cargo compartments (33), a plurality of bolt plates (34) being arranged on both sides of each cargo compartment (33), the bolt plates (34) being threadedly connected to the bolt blocks (3) by bolts, and characterized in that: The frame (1) is provided with two slots for placing movable components; Each movable component comprises: a right-angle plate (5), a receiving plate (7), a positioning bar (8), a connecting plate (9), two sliding bars (10), two moving plates (11), two threaded blocks (16), four connecting bars (17), two sliding blocks (18) and a limiting plate (19); The right-angle plate (5) is L-shaped, the right-angle plate (5) is fixed in the slot of the frame (1), the connecting plate (9) is fixedly connected to the right-angle plate (5), a slide bar (10) is provided on both sides of the connecting plate (9), the slide bar (10) is trapezoidal, the receiving plate (7) is inverted L-shaped, and the receiving plate (7) corresponds to the right-angle plate (5), and two slots for inserting the slide bar (10) are provided inside the upper end of the receiving plate (7), and the two slide bars (10) are The top of the receiving plate (7) is fixedly connected to the positioning strip (8) and the limiting plate (19) is fixed to one side of the right-angle plate (5). The receiving plate (7) is provided with an opening for placing the moving plate (11) on the side away from the limiting plate (19). Both openings are arranged inside the opening of the receiving plate (7). The two sides of each threaded block (16) are fixedly connected to the two connecting strips (17) respectively. The two threaded blocks (1 6) A connecting strip (17) on one side is fixedly connected to the corresponding moving plate (11); two threaded blocks (16) are respectively fixedly connected to the connecting strip (17) on the side away from the moving plate (11); a movable groove for plugging the connecting strip (17) is provided on the side of the limiting plate (19) away from the receiving plate (7); the two sliding blocks (18) are plugged into the movable groove of the limiting plate (19); a positioning strip (8) for fixing the bolt sheet (34) is provided on the top of the receiving plate (7) near the limiting plate (19); a limiting groove for plugging the positioning strip (8) is provided at the bottom corresponding to each cargo bin (33); the positioning strip (8) is plugged into the limiting groove at the bottom of the corresponding cargo bin (33); each moving plate (11) is in an arc shape, and the arc ends of the two moving plates (11) correspond to each other; and a pulling component for pulling the moving plate (11) to move is provided in the two moving plates (11); The pulling assembly comprises: two rope drums (21), two pulling ropes (22), two winding columns (23) and a blocking plate (24); Two winding columns (23) are fixed in the middle of the two rope drums (21), a baffle (24) is fixed on the two winding columns (23), two pull ropes (22) are respectively arranged on both sides of the winding columns (23), and the baffle (24) separates the two pull ropes (22), the two pull ropes (22) are both wound and connected to the two winding columns (23), one end of the two pull ropes (22) is respectively fixedly connected to the corresponding rope drums (21), and the other ends of the two pull ropes (22) are respectively fixedly connected to the two movable plates (11), the arc hole formed by the two movable plates (11) is larger than the size of the rope drums (21), and one side of the two movable plates (11) is provided with a positioning component for limiting the two movable plates (11); The positioning assembly comprises: a special-shaped block (15), a connecting column (20), two inserting blocks (31), a fixing ring (32), two limiting strips (29) and a plurality of inserting strips (30); The special-shaped block (15) is in a cross shape, the special-shaped block (15) is fixedly connected to the receiving plate (7), an opening for movable connection of the connecting column (20) is provided on the special-shaped block (15), the connecting column (20) passes through the opening of the special-shaped block (15) and is fixedly connected to a rope drum (21) away from the threaded block (16), a fixing ring (32) is fixed to one end of the connecting column (20), and two plug blocks (31) are correspondingly fixed to the fixing ring (32), and each plug block ( The plurality of inserting strips (30) are respectively fixed on the two limiting strips (29), and the plurality of inserting strips (30) are plugged into the corresponding movable grooves of the two inserting blocks (31). The limiting strips (29) are in the shape of a seven-character figure. The upper and lower ends of the special-shaped block (15) are respectively provided with a square groove for plugging the limiting strips (29), and the two limiting strips (29) are respectively plugged into the two square grooves of the special-shaped block (15).

2. The easily replaceable frame for a semitrailer according to claim 1, characterized in that: A reset component for driving the movable plate (11) to reset is provided inside the opening of each receiving plate (7); Each reset assembly comprises: four blocking bars (12), four tension springs (13) and four limiting columns (14); The receiving plate (7) is provided with two circular holes at the top and bottom of one side of the receiving plate (7) having an opening, and the circular holes of the receiving plate (7) are connected to the opening of the receiving plate (7), four baffles (12) are provided in the opening of the receiving plate (7), and the four baffles (12) are respectively fixed on both sides of the two movable plates (11), and four tension springs (13) are provided inside the opening of the receiving plate (7), and the two ends of each tension spring (13) are respectively fixed to the corresponding baffle (12) and the inner wall of the opening of the receiving plate (7), and each tension spring (13) is respectively sleeved on the corresponding limiting column (14), and each limiting column (14) passes through the corresponding circular hole of the receiving plate (7) and is fixedly connected to the baffle (12), and the shape of the baffle (12) is larger than the circular hole of the receiving plate (7).

3. The easily replaceable frame for a semitrailer according to claim 1, characterized in that: An extension component for extending the movement range of the receiving plate (7) is provided at one end of each connecting plate (9) away from the bearing block (6); Each extension assembly comprises: a connecting block (25), a growth plate (26), two top blocks (27), a plug post (28) and a clamping plate (41); The end of the connecting plate (9) away from the bearing block (6) is fixedly connected to the connecting block (25), the end of the right angle plate (5) away from the bearing block (6) is provided with a transverse slot, the bottom of the growth plate (26) is fixed to the card plate (41), the card plate (41) is inserted into the transverse slot of the right angle plate (5), two slide bars (10) are fixed on both sides of the top of the growth plate (26), one side of the growth plate (26) is provided with a snap groove for docking with the connecting block (25), two top blocks (27) are fixed in the snap groove of the growth plate (26), and the size of the two top blocks (27) corresponds to that of the connecting block (25), the connecting block (25) is inserted into the snap groove of the growth plate (26), and the two top blocks (27) and the connecting block (25) are both provided with round slots for inserting the plug column (28), and the plug column (28) is inserted into the round slots of the two top blocks (27) and the connecting block (25).

4. The easily replaceable frame for a semitrailer according to claim 1, characterized in that: A plurality of position limiting components for fixing the two cargo bins (33) are provided on corresponding sides of the two cargo bins (33); Each limiting assembly comprises: a toothed bar (35), a spiral column (36), a gear column (37) and a threaded ring (38); The spiral column (36) and the gear column (37) are respectively fixed on the two cargo bins (33); the toothed bar (35) is provided with a gear hole and a circular opening; the gear column (37) is provided with a gear; the gear hole of the toothed bar (35) corresponds to the gear on the gear column (37); the spiral column (36) and the gear column (37) are respectively movably connected to the gear hole and the circular opening of the toothed bar (35); a threaded groove is provided at one end of the spiral column (36) away from the cargo bin (33); and a threaded ring (38) is threadedly connected to the threaded groove of the spiral column (36).

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