A new type of frame structure of a curtain-type semi-trailer

Abstract

The invention discloses a novel frame structure of a curtain-type semitrailer, comprising a front crossbeam, a guide plate and a left web plate, two opposite longitudinal beam assemblies are fixed on the right side surface of the front crossbeam, the two longitudinal beam assemblies are connected with four traction pin plate crossbeams and four middle crossbeams, the middle crossbeam is located at the right end of the pin plate crossbeam, the front and rear sides of the front crossbeam are connected with two side beam welded parts through two side beam L-shaped hook plates, two corresponding front end reinforcing ribs are fixed to the left end of the upper side surface of the side beam welded part, a front column mounting plate is fixed to the upper side surface of the front end reinforcing rib plate, the right ends of the two side beam welded parts are connected to the rear crossbeam through two side beam rear end transition plates, two corresponding rear end reinforcing ribs are fixed to the upper side of the rear crossbeam, a rear column mounting plate is fixed to the upper side surface of the rear end reinforcing rib plate, the curtain-type semitrailer has strong uniform load-bearing performance and improves the lateral torsion resistance of the curtain vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of curtain-cord box-type semi-trailer, in particular to a novel frame structure of a curtain-cord box-type semi-trailer. Background Art

[0002] The curtain-type box semi-trailer is an upgraded model of the ordinary box semi-trailer and the warehouse-type semi-trailer. It is currently widely used in Europe, but it is not widely used in China due to the influence of manufacturing process and cost. However, due to the gradual restrictions of national laws and regulations on ordinary flatbed and warehouse-type semi-trailers, the domestic market has gradually become optimistic about the curtain-type box semi-trailer. The curtain box may become the best model to replace ordinary flatbed and warehouse-type semi-trailers; however, the domestic curtain box manufacturing technology and manufacturing process are not mature at present, and its frame is mainly directly borrowed from the frame of the traditional flatbed cargo warehouse-type semi-trailer. Since the load-bearing requirements, loading and unloading methods, and cargo stacking requirements of the curtain-type box semi-trailer are quite different from those of the traditional warehouse-type semi-trailer, directly using the frame structure of the traditional warehouse-type semi-trailer or flatbed semi-trailer is bound to affect the overall load-bearing performance and fatigue life of the curtain-type box car. Therefore, we designed a new frame structure of the curtain-type box semi-trailer based on the ordinary straight beam semi-trailer frame according to the characteristics of the curtain-type box semi-trailer. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a new frame structure of a curtain-type semi-trailer, which has strong uniform load-bearing performance and improves the lateral torsion resistance of the curtain vehicle, and can effectively solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a frame structure of a novel curtain-type semitrailer, comprising a front crossbeam, a guide plate and a left web;

[0005] The front and rear sides of the front frame are connected to each other through two L-shaped hook plates of the side beams, and two corresponding front end reinforcing ribs are fixed on the left end of the upper side surface of the side beams. A front column mounting plate is fixed on the upper side surface of the front end reinforcing ribs, and the right ends of the two side beams are connected to the rear cross beam through two side beam rear end transition plates. Two corresponding rear end reinforcing ribs are fixed on the upper side of the rear cross beam, and a rear column mounting plate is fixed on the upper side surface of the rear end reinforcing ribs. A wooden floor is fixed on the right ends of the corresponding inner sides of the two side beams. A rear guard assembly is fixed on the right side surface of the wooden floor, a spare tire rack assembly is fixed on the upper side surface of the wooden floor, a fender assembly is installed on the lower side surface of the wooden floor, and evenly distributed first A diagonal brace and a second diagonal brace, wherein one end of the first diagonal brace and the second diagonal brace away from the wooden floor is fixed to the lower side surface of two side beam welded parts, an L-shaped bottom plate fixing plate is fixed to the left side surface of the wooden floor, the left side surface of the L-shaped bottom plate fixing plate is connected to the right side surface of the brim-shaped bottom plate fixing plate, a BPW suspension mounting frame and a relay valve bracket are installed on the upper side surface of the wooden floor, the BPW suspension mounting frame is located on the left side of the relay valve bracket, twelve mutually corresponding spring bracket outer reinforcement ribs are fixed to the upper side surface of the wooden floor, the upper side surfaces of the twelve spring bracket outer reinforcement ribs are fixed to the lower side surfaces of two longitudinal beam assemblies, a uniformly distributed cantilever is fixed to the lower side surface of the longitudinal beam assembly, one end of the cantilever away from the longitudinal beam assembly is fixed to the side surface of the side beam welded part, two corresponding angle supports are fixed to the side surfaces of the two longitudinal beam assemblies, one end of the two angle supports away from the two longitudinal beam assemblies is fixed to the side surfaces of the two side beam L-shaped hook plates on the left side, and two corresponding middle longitudinal beams are fixed to the lower side surface of the front cross beam;

[0006] Guide plate: the guide plate is fixed on the lower side of the two middle longitudinal beams, a traction pin plate is fixed on the right side of the guide plate, two corresponding second traction pin longitudinal beams are fixed on the upper side of the traction pin plate, the two second traction pin longitudinal beams are connected by two traction pin cross beams, and two corresponding first traction pin longitudinal beams are fixed on the left and right sides of the second traction pin longitudinal beam;

[0007] Left web: The upper side of the left web is fixed to the lower side of the two side beam welded parts, six corresponding reinforcing vertical plates and the main cross beam at the leg are fixed to the upper side of the left web, the six reinforcing vertical plates and the upper side of the main cross beam at the leg are fixed to the lower side of the two longitudinal beam assemblies, and the right side of the left web is connected to the brim-shaped bottom plate fixing plate through the reinforcing ribs at the web joint;

[0008] Wherein: it also includes a small crossbeam, and two small crossbeams are provided, and the two small crossbeams are fixed on the upper side surface of the brim-shaped bottom plate fixing plate correspondingly.

[0009] Furthermore, the left side surfaces of the two first traction pin longitudinal beams on the left are connected to the right side surfaces of the two traction pin plates on the left, and the length of the first traction pin longitudinal beam is less than the length of the second traction pin longitudinal beam.

[0010] Furthermore, there are ten cantilevers, which correspond to each other in pairs. Two cantilever oblique supports are fixed on the lower side surfaces of the two cantilever arms on the left, and one end of the two cantilever oblique supports away from the two cantilever arms on the left is fixed on the upper side surface of the left belly plate.

[0011] Furthermore, it also includes C-shaped interlaced cross beams, which are provided with twelve C-shaped interlaced cross beams. The twelve C-shaped interlaced cross beams are correspondingly fixed on the corresponding inner side surfaces of the two side beam welded parts, and the twelve C-shaped interlaced cross beams are located below the two longitudinal beam assemblies.

[0012] Furthermore, it also includes I-shaped interlaced cross beams, and four I-shaped interlaced cross beams are provided. The four I-shaped interlaced cross beams are correspondingly fixed on the corresponding inner side surfaces of the two side beam welded parts, and the four I-shaped interlaced cross beams are located below the two longitudinal beam assemblies.

[0013] Furthermore, four corresponding air tank brackets are fixed to the middle portions of the corresponding inner sides of the two longitudinal beam assemblies.

[0014] Furthermore, a web joint cover box is fixed on the front side surface of the front side edge beam weldment, a leg box assembly is installed on the front side surface of the web joint cover box, and an inclined support assembly is installed on the front side surface of the leg box assembly.

[0015] Furthermore, it also includes a main cross beam, and three main cross beams are provided. The three main cross beams are correspondingly fixed on the corresponding inner side surfaces of the two side beam welded parts.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the frame structure of the novel curtain box semi-trailer has the following advantages:

[0017] 1. The frame is made of two longitudinal beams welded together through the main cross beam, and multiple interlaced beams are welded through the web of the longitudinal beam. The two ends of the interlaced beams are connected to the side beams, and the front and rear ends are connected into a whole through the front and rear cross beams. The two ends of the interlaced beams are connected to the lower wing plate of the longitudinal beam through diagonal braces, which further enhances the support strength and stability of the frame;

[0018] 2. The lower traction pin plate at the gooseneck is flush with the lower wing plate of the longitudinal beam, so that the gooseneck height can be minimized, and the frame platform height can be minimized while ensuring the saddle height, which is convenient for loading and unloading goods;

[0019] 3. The fender mounting frame, parking wedge placement frame and spare tire rack are all bolted to the longitudinal beam, which is convenient for assembly and improves the efficiency of assembly production;

[0020] 4. All the intersecting beams, main cross beams and diagonal braces of the vehicle are equipped with multiple weight-reducing holes, which can reduce the weight of the vehicle while ensuring the load-bearing capacity. The installation grooves of the side curtain columns, curtain fixing grooves and cargo baffles are installed on the outside of the frame side beams;

[0021] 5. A brim-shaped bottom plate fixing frame is fixed on the upper wing surface of the longitudinal beam to facilitate the installation of wooden floors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the left structure of the present invention;

[0024] Figure 3 It is a sectional view of the left upper side of the present invention;

[0025] Figure 4 It is a sectional view of the upper right end of the present invention;

[0026] Figure 5 This is a schematic diagram of the front left end structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the front middle structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the front right end structure of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the left end cross-sectional view of the front side of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the front middle cross-sectional view of the present invention;

[0031] Fig.10 It is a schematic diagram of the cross-sectional view of the front right end of the present invention;

[0032] Fig.11 It is a schematic diagram of the left side cross-sectional view of the present invention;

[0033] Fig.12 It is a schematic diagram of the front structure of the present invention;

[0034] Fig.13 It is a front sectional view of the present invention.

[0035] In the figure: 1 longitudinal beam assembly, 2 front cross beam, 3 side beam weldment, 4 side beam L-shaped hook plate, 5 corner support, 6 middle longitudinal beam, 7 guide plate, 8 traction pin plate, 9 first traction pin longitudinal beam, 10 second traction pin longitudinal beam, 11 traction pin cross beam, 12 traction pin plate cross beam, 13 cantilever, 14 middle cross beam, 15 C-type interlaced cross beam, 16 I-shaped interlaced cross beam, 17 BPW suspension mounting frame, 18 relay valve bracket, 19 air reservoir support frame, 20 rear cross beam, 21 first diagonal brace, 22 spring bracket outer reinforcement rib, 23 second diagonal brace, 24 cover box at web joint, 25 leg box assembly, 26 oblique support assembly, 27 cantilever oblique support, 28 reinforced vertical plate, 29 main crossbeam at leg, 30 reinforcement ribs at web joint, 31 small crossbeam, 32 main crossbeam, 33 front end reinforcement rib plate, 34 front column mounting plate, 35 brim-type bottom plate fixing plate, 36 L-type bottom plate fixing plate, 37 rear end reinforcement rib plate, 38 rear column mounting plate, 39 rear end transition plate of side beam, 40 wooden floor, 41 rear protection assembly, 42 spare tire rack assembly, 43 fender assembly, 44 left web. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-13 , the present invention provides a technical solution: a frame structure of a novel curtain-type semitrailer, comprising a front crossbeam 2, a guide plate 7 and a left web 44;

[0038] Front crossbeam 2: Two opposite longitudinal beam assemblies 1 are fixed on the right side of the front crossbeam 2, and the two longitudinal beam assemblies 1 are connected through four traction pin plate crossbeams 12 and four middle crossbeams 14, and the middle crossbeam 14 is located at the right end of the pin plate crossbeam 12. The front and rear sides of the front crossbeam 2 are connected to the two side beam welded parts 3 through two side beam L-shaped hook plates 4. The left end of the upper side of the side beam welded part 3 is fixed with two corresponding front end reinforcing ribs 33, and the upper side of the front end reinforcing ribs 33 is fixed with a front column mounting plate 34. The right ends of the two side beam welded parts 3 are connected through two The rear transition plate 39 of the side beam is connected to the rear cross beam 20, and two corresponding rear end reinforcing ribs 37 are fixed on the upper side of the rear cross beam 20, and a rear column mounting plate 38 is fixed on the upper side of the rear end reinforcing ribs 37. A wooden floor 40 is fixed to the right end of the corresponding inner side of the two side beam welded parts 3, and a rear protection assembly 41 is fixed to the right side of the wooden floor 40. A spare tire rack assembly 42 is fixed to the upper side of the wooden floor 40, and a fender assembly 43 is installed on the lower side of the wooden floor 40. The first uniformly divided first and second first and second second side of the wooden floor 40 are fixed to the front and rear sides of the wooden floor 40. The diagonal brace 21 and the second diagonal brace 23, the ends of the first diagonal brace 21 and the second diagonal brace 23 away from the wooden floor 40 are fixed on the lower side of the two side beam welded parts 3, an L-shaped bottom plate fixing plate 36 is fixed on the left side of the wooden floor 40, the left side of the L-shaped bottom plate fixing plate 36 is connected to the right side of the brim-shaped bottom plate fixing plate 35, a BPW suspension mounting frame 17 and a relay valve bracket 18 are installed on the upper side of the wooden floor 40, the BPW suspension mounting frame 17 is located on the left side of the relay valve bracket 18, and twelve mutually opposite ones are fixed on the upper side of the wooden floor 40 The upper side surfaces of the twelve spring bracket outer reinforcing ribs 22 are fixed to the lower side surfaces of the two longitudinal beam assemblies 1, and the lower side surfaces of the longitudinal beam assemblies 1 are fixed with evenly distributed cantilevers 13, and one end of the cantilever 13 away from the longitudinal beam assembly 1 is fixed to the side surface of the side beam weldment 3, and two corresponding angle supports 5 are fixed to the side surfaces of the two longitudinal beam assemblies 1, and one end of the two angle supports 5 away from the two longitudinal beam assemblies 1 is fixed to the side surfaces of the two side beam L-shaped hook plates 4 on the left side, and two corresponding middle longitudinal beams 6 are fixed to the lower side surface of the front cross beam 2;

[0039] Guide plate 7: The guide plate 7 is fixed on the lower side of the two middle longitudinal beams 6, a traction pin plate 8 is fixed on the right side of the guide plate 7, two corresponding second traction pin longitudinal beams 10 are fixed on the upper side of the traction pin plate 8, the two second traction pin longitudinal beams 10 are connected by two traction pin cross beams 11, and two corresponding first traction pin longitudinal beams 9 are fixed on the left and right sides of the second traction pin longitudinal beam 10;

[0040] Left web plate 44: The upper side of the left web plate 44 is fixed to the lower side of the two side beam welded parts 3, and six corresponding reinforcing vertical plates 28 and the main cross beam 29 at the leg are fixed to the upper side of the left web plate 44. The upper side of the six reinforcing vertical plates 28 and the main cross beam 29 at the leg are fixed to the lower side of the two longitudinal beam assemblies 1. The right side of the left web plate 44 is connected to the brim-shaped bottom plate fixing plate 35 through the reinforcing ribs 30 at the web plate joint;

[0041] Among them, it also includes a small crossbeam 31, two small crossbeams 31 are provided, and the two small crossbeams 31 are fixed on the upper side of the brim-shaped bottom plate fixing plate 35 correspondingly.

[0042] Among them: the left side surfaces of the two first traction pin longitudinal beams 9 on the left are connected to the right side surfaces of the two traction pin plates 8 on the left, and the length of the first traction pin longitudinal beam 9 is less than the length of the second traction pin longitudinal beam 10.

[0043] Among them: there are ten cantilevers 13, which correspond to each other in pairs. Two cantilever oblique supports 27 are fixed on the lower side surfaces of the two cantilever arms 13 on the left side, and one end of the two cantilever oblique supports 27 away from the two cantilever arms 13 on the left side is fixed on the upper side surface of the left web 44.

[0044] Among them: it also includes C-shaped interlaced cross beams 15, and there are twelve C-shaped interlaced cross beams 15. The twelve C-shaped interlaced cross beams 15 are correspondingly fixed on the corresponding inner side surfaces of the two side beam welded parts 3, and the twelve C-shaped interlaced cross beams 15 are located below the two longitudinal beam assemblies 1.

[0045] Among them: it also includes an I-shaped interlaced cross beam 16, four I-shaped interlaced cross beams 16 are arranged, and the four I-shaped interlaced cross beams 16 are correspondingly fixed on the corresponding inner side surfaces of the two side beam welded parts 3, and the four I-shaped interlaced cross beams 16 are located below the two longitudinal beam assemblies 1.

[0046] Among them, four corresponding gas cylinder brackets 19 are fixed to the middle parts of the corresponding inner sides of the two longitudinal beam assemblies 1.

[0047] Wherein: a web butt joint cover box 24 is fixed on the front side surface of the front side edge beam weldment 3, a leg box assembly 25 is installed on the front side surface of the web butt joint cover box 24, and an oblique support assembly 26 is installed on the front side surface of the leg box assembly 25.

[0048] Among them, it also includes a main cross beam 32, three main cross beams 32 are provided, and the three main cross beams 32 are correspondingly fixed on the corresponding inner side surfaces of the two side beam welding parts 3.

[0049] When in use: the frame is a straight beam structure with a total length of 13.7 meters and a total width of 2.54 meters. The center distance of the longitudinal beam is increased to 1.1 meters compared with the straight beam flatbed truck, which improves the uniform load-bearing performance of the curtain compartment frame and the lateral torsion resistance of the curtain truck, which is beneficial to maintaining the stability of the vehicle turning when the compartment is fully loaded. Since lowering the platform height is conducive to loading more goods and facilitating loading and unloading of goods, it is necessary to design the gooseneck height to be small enough while ensuring the gooseneck strength, and increase the height of the middle section of the longitudinal beam assembly 1 to ensure the load-bearing capacity of the vehicle, so that the height of the rear end of the longitudinal beam assembly 1 is slightly lower than the height of the middle section of the longitudinal beam assembly 1, while ensuring the load-bearing capacity. The weight of the longitudinal beam assembly 1 can be reduced. This frame is designed mainly according to the characteristics of the side curtain box car. The gooseneck height is very low, so that the frame platform is very low, which is convenient for loading and unloading goods. It has a simple manufacturing process, high torsional strength, strong load-bearing capacity, and uses lightweight components. The accessories are easy to assemble, which improves production efficiency.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of frame structure of a curtain box semi-trailer, characterized by: It comprises a front cross beam (2), a guide plate (7) and a left web (44); Front cross beam (2): Two opposite longitudinal beam assemblies (1) are fixed on the right side surface of the front cross beam (2), and the two longitudinal beam assemblies (1) are connected through four traction pin plate cross beams (12) and four middle cross beams (14), and the middle cross beam (14) is located at the right end of the pin plate cross beam (12). The front and rear sides of the front cross beam (2) are connected to two side beam welded parts (3) through two side beam L-shaped hook plates (4), and two corresponding front end reinforcement ribs (33) are fixed on the left end of the upper side surface of the side beam welded parts (3), and a front column mounting plate (34) is fixed on the upper side surface of the front end reinforcement rib plate (33). The right ends of the two side beam welded parts (3) are connected through two A rear transition plate (39) at the rear end of each side beam is connected to the rear cross beam (20); two corresponding rear end reinforcing ribs (37) are fixed on the upper side of the rear cross beam (20); a rear column mounting plate (38) is fixed on the upper side of the rear end reinforcing ribs (37); a wooden floor (40) is fixed to the right end of the corresponding inner side surfaces of the two side beam welded parts (3); a rear protection assembly (41) is fixed to the right side surface of the wooden floor (40); a spare tire rack assembly (42) is fixed to the upper side surface of the wooden floor (40); a fender assembly (43) is installed on the lower side surface of the wooden floor (40); and evenly distributed front and rear side surfaces of the wooden floor (40) are fixed. A first diagonal brace (21) and a second diagonal brace (23), one end of the first diagonal brace (21) and the second diagonal brace (23) away from the wooden floor (40) is fixed on the lower side of the two side beam welded parts (3), an L-shaped bottom plate fixing plate (36) is fixed on the left side of the wooden floor (40), the left side of the L-shaped bottom plate fixing plate (36) is connected to the right side of the brim-shaped bottom plate fixing plate (35), a BPW suspension mounting frame (17) and a relay valve bracket (18) are installed on the upper side of the wooden floor (40), the BPW suspension mounting frame (17) is located on the left side of the relay valve bracket (18), and ten Two mutually corresponding spring bracket outer reinforcing ribs (22), the upper side surfaces of the twelve spring bracket outer reinforcing ribs (22) are fixed on the lower side surfaces of the two longitudinal beam assemblies (1), the lower side surfaces of the longitudinal beam assemblies (1) are fixed with evenly distributed cantilevers (13), one end of the cantilever (13) away from the longitudinal beam assembly (1) is fixed to the side surface of the side beam weldment (3), the side surfaces of the two longitudinal beam assemblies (1) are fixed with two corresponding angle supports (5), one end of the two angle supports (5) away from the two longitudinal beam assemblies (1) is fixed to the side surfaces of the two side beam L-shaped hook plates (4) on the left side, and the lower side surface of the front cross beam (2) is fixed with two corresponding middle longitudinal beams (6); Guide plate (7): the guide plate (7) is fixed on the lower side of the two middle longitudinal beams (6), a traction pin plate (8) is fixed on the right side of the guide plate (7), two corresponding second traction pin longitudinal beams (10) are fixed on the upper side of the traction pin plate (8), the two second traction pin longitudinal beams (10) are connected by two traction pin cross beams (11), and two corresponding first traction pin longitudinal beams (9) are fixed on the left and right sides of the second traction pin longitudinal beam (10); Left web (44): the upper side of the left web (44) is fixed to the lower side of the two side beam welded parts (3), six corresponding reinforcing vertical plates (28) and the main cross beam (29) at the support leg are fixed to the upper side of the left web (44), the upper side of the six reinforcing vertical plates (28) and the main cross beam (29) at the support leg are fixed to the lower side of the two longitudinal beam assemblies (1), and the right side of the left web (44) is connected to the brim-shaped bottom plate fixing plate (35) through the reinforcing ribs (30) at the web joint; Wherein: it also includes a small crossbeam (31), wherein two small crossbeams (31) are provided, and the two small crossbeams (31) are correspondingly fixed on the upper side surface of the brim-shaped bottom plate fixing plate (35).

2. The frame structure of a novel curtain-type semitrailer according to claim 1 is characterized in that: The left side surfaces of the two first traction pin longitudinal beams (9) on the left are connected to the right side surfaces of the two traction pin plates (8) on the left, and the length of the first traction pin longitudinal beam (9) is smaller than the length of the second traction pin longitudinal beam (10).

3. The frame structure of a novel curtain-type semitrailer according to claim 1 is characterized in that: Ten cantilevers (13) are provided, and the ten cantilevers (13) correspond to each other in pairs. Two cantilever oblique supports (27) are fixed on the lower side surfaces of the two cantilever arms (13) on the left side, and one end of the two cantilever oblique supports (27) away from the two cantilever arms (13) on the left side is fixed on the upper side surface of the left web (44).

4. The frame structure of a novel curtain-type semitrailer according to claim 1 is characterized in that: It also includes C-shaped interlaced cross beams (15), wherein twelve C-shaped interlaced cross beams (15) are provided, and the twelve C-shaped interlaced cross beams (15) are correspondingly fixed on the corresponding inner side surfaces of the two side beam welded parts (3), and the twelve C-shaped interlaced cross beams (15) are located below the two longitudinal beam assemblies (1).

5. The frame structure of a novel curtain-type semitrailer according to claim 1 is characterized in that: It also includes an I-shaped interlaced cross beam (16), wherein four I-shaped interlaced cross beams (16) are provided, and the four I-shaped interlaced cross beams (16) are correspondingly fixed on the corresponding inner side surfaces of the two side beam welded parts (3), and the four I-shaped interlaced cross beams (16) are located below the two longitudinal beam assemblies (1).

6. The frame structure of a novel curtain-type semitrailer according to claim 1 is characterized in that: Four corresponding gas cylinder brackets (19) are fixed to the middle parts of the corresponding inner sides of the two longitudinal beam assemblies (1).

7. The frame structure of a novel curtain-type semitrailer according to claim 1 is characterized in that: A web joint cover box (24) is fixed on the front side surface of the front side edge beam weldment (3), a leg box assembly (25) is installed on the front side surface of the web joint cover box (24), and an inclined support assembly (26) is installed on the front side surface of the leg box assembly (25).

8. The frame structure of a novel curtain-type semitrailer according to claim 1 is characterized in that: It also includes a main cross beam (32), wherein three main cross beams (32) are provided, and the three main cross beams (32) are correspondingly fixed on the corresponding inner side surfaces of the two side beam welded parts (3).

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