Modularized heavy-duty truck carriage and metal frame thereof

Abstract

The utility model relates to a modularized heavy-duty truck carriage and a metal frame thereof. The metal frame is formed by a front end frame module, two side end frame modules, a bottom end frame module and a tail end frame module in a surrounding mode. The front end frame module comprises a photo frame type structure formed by fixedly connecting two front stand columns, a front plate upper cross beam and a front plate lower cross beam. Each side end frame module is of a photo frame type structure formed by fixedly connecting a front stand column, a side plate upper cross beam, a side plate lower cross beam, a side plate vertical rib and a rear stand column. The top end of the tail end frame module is movably connected with the side end frame module and the bottom end frame module; the tail end frame module comprises a photo frame type structure formed by fixedly connecting a tail end upper cross beam, a tail end lower cross beam and two tail end stand columns. And the plates are fixed in the photo frame type structures by the plate fastening devices. The metal frame adopts a modular structure, and each module forms a photo frame type structure for realizing insertion type assembly of plates, so that the assembly efficiency can be improved, and a damaged carriage plate can be independently replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of freight carriages, and particularly relates to a modular heavy-duty freight carriage and its metal frame. Background Art

[0002] The carriage body of a heavy-duty truck is generally assembled by welding a metal frame and a metal panel. The metal frame is mostly composed of angle steel or U-shaped steel. The metal frame has a complex structure, is difficult to manufacture, and requires special tooling for fixation during the welding process, resulting in difficult production and processing. Due to the complex structure of the metal frame, relevant errors will occur during the welding process, leading to difficulties in the fitting of metal profiles and plates. The overall weight of the metal carriage body is high, reducing the effective cargo capacity of the heavy-duty truck and increasing fuel consumption.

[0003] With the requirements of vehicle lightweight and environmental protection and economy, assembled freight carriages have received increasing attention. At present, assembled freight carriages are mostly applied to light trucks and insulated trucks. Such freight carriages are mostly composed of ordinary profiles and insulation boards. The load capacity of the trucks is low, and the overall load-bearing capacity of the carriage is not high, unable to meet the demand for large cargo volumes. In addition, the panel adopts an integral structure. Once damaged, it needs to be replaced as a whole, resulting in high subsequent maintenance costs. Summary of the Utility Model

[0004] The utility model provides a modular heavy-duty freight carriage and its metal frame. The metal frame adopts a modular structure, and each module forms a photo-frame structure for realizing plug-in assembly of plates. The assembly process is simple, which can improve the assembly efficiency and processing and production efficiency. While ensuring the lightweight of the carriage, it can meet the requirements of high load-bearing and high strength of the heavy-duty carriage. The damaged carriage plates can be replaced independently, and the maintenance cost of the carriage body is low, and the maintainability is strong.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A metal frame for a modular heavy-duty freight carriage, which includes a front-end frame module, two side-end frame modules, a bottom-end frame module, a tail-end frame module, and a plate fastening device;

[0007] The bottom end of the front-end frame module is fixedly connected to the front end of the bottom-end frame module; the front-end frame module includes a photo-frame structure formed by fixedly connecting two front columns, an upper front plate cross beam, and a lower front plate cross beam;

[0008] The two side-end frame modules are symmetrically installed on both sides of the bottom-end frame module and are fixedly connected to the front-end frame module at the front end; the side-end frame module is a photo-frame structure formed by fixedly connecting the front column, an upper side plate cross beam, a lower side plate cross beam, side plate vertical ribs, and a rear column;

[0009] The bottom frame module is a photo frame structure formed by fixedly connecting the front plate lower cross beam, the bottom plate rear edge wrapping, the bottom plate horizontal edge wrapping, the side plate lower cross beam, the bottom cross beam and the bottom longitudinal beam;

[0010] The tail end frame module is arranged opposite to the front end frame module, and is movably connected to the top end of the side end frame module and movably connected to the bottom end of the bottom end frame module; the tail end frame module includes a photo frame structure formed by fixedly connecting a tail end upper cross beam, a tail end lower cross beam and two tail end columns;

[0011] The plate fastening device is fixedly installed on the front end frame module, the side end frame module and the tail end frame module, and is used for fixing the plates inserted into each photo frame structure.

[0012] Furthermore, the front column is formed by welding a first rectangular tube, a second rectangular tube, a first steel plate and a second steel plate;

[0013] The first rectangular tube is welded to the second rectangular tube; the first steel plate is arranged parallel to the second rectangular tube and is welded to the first rectangular tube, and a first slot for inserting the front side of the side plate is formed between the first steel plate and the second rectangular tube; the second steel plate is arranged parallel to the first rectangular tube and is welded to the first steel plate, and a second slot for inserting the side edge of the front end plate is formed among the first steel plate, the second steel plate and the first rectangular tube;

[0014] The front plate upper cross beam is composed of welding a first square tube and a first triangular steel; a third slot for inserting the top edge of the front end plate is formed between the first triangular steel and the first square tube;

[0015] The front plate lower cross beam is formed by welding a second square tube, a first channel steel, a third steel plate and a fourth steel plate; the first channel steel is welded to the rear side of the second square tube; the third steel plate is arranged vertically and is parallel to the second square tube and is welded to the top surface of the first channel steel, and a fourth slot for inserting the bottom edge of the front end plate is formed between the third steel plate and the second square tube; the fourth steel plate is arranged horizontally and is perpendicularly welded to the rear side of the third steel plate, and a fifth slot for inserting the front edge of the bottom plate is formed among the fourth steel plate, the third steel plate and the first channel steel;

[0016] The four sides of the front end plate are inserted into the second slot, the third slot and the fourth slot, and the front end plate is fixed by using the plate fastening device;

[0017] The two first rectangular tubes, the first square tube and the second square tube are welded to form a rectangular frame.

[0018] Further, the front-end frame module further includes a front cross beam and a front longitudinal beam;

[0019] The front cross beam is welded between the two first rectangular tubes;

[0020] The front longitudinal beam is welded between the front cross beam and the second square tube;

[0021] Both the front cross beam and the front longitudinal beam are made of channel steel;

[0022] The front cross beam is provided with two front plate stiffener buckles;

[0023] The front plate stiffener buckle wraps the front plate stiffener and is fixedly connected to the front cross beam by bolts.

[0024] Further, the side plate upper cross beam is formed by combining and welding a third square tube and a second triangular steel, and a sixth slot for inserting the top edge of the side plate is formed between the third square tube and the second triangular steel;

[0025] The side plate lower cross beam is welded by a fourth square tube, a second channel steel, a fifth steel plate and a sixth steel plate; the second channel steel is welded to the inner side surface of the fourth square tube; the fifth steel plate is arranged vertically and parallel to the fourth square tube and is welded to the top surface of the second channel steel, and a seventh slot for inserting the bottom edge of the side plate is formed between the fifth steel plate and the fourth square tube; the sixth steel plate is arranged horizontally and perpendicularly welded to the inner side surface of the fifth steel plate, and an eighth slot for inserting the side edge of the bottom plate is formed among the fifth steel plate, the sixth steel plate and the second channel steel;

[0026] The rear column is formed by combining and welding a fifth square tube and a third triangular steel, and a ninth slot for inserting the rear edge of the side plate is formed between the top surface of the fifth square tube and the third triangular steel;

[0027] The second rectangular tube, the third square tube, the fourth square tube and the fifth square tube are welded to form a rectangular frame; two side plate vertical ribs are welded between the third square tube and the fourth square tube; the side plate vertical ribs divide the side end frame module into three modules, namely a side end frame front module, a side end frame middle module and a side end frame rear module; the side plate is correspondingly divided into a side plate front module, a side plate middle module and a side plate rear module;

[0028] The side plate vertical ribs are welded by a third channel steel, a seventh steel plate and a plurality of connecting rib plates. The opening of the third channel steel faces the outside of the carriage, and a plurality of the connecting rib plates are distributed at intervals along the vertical direction on the inner side surface. The outer side surface of the seventh steel plate is welded to the connecting rib plate. A tenth slot for inserting the rear side of the front side plate module and the rear side of the middle side plate module, and an eleventh slot for inserting the front side of the middle side plate module and the front side of the rear side plate module are formed between the third channel steel and the seventh steel plate on both sides of the connecting rib plate.

[0029] The front side plate module is inserted into the first slot, the sixth slot, the seventh slot and the tenth slot. The middle side plate module is inserted into the eleventh slot, the sixth slot, the seventh slot and the tenth slot. The rear side plate module is inserted into the eleventh slot, the sixth slot, the seventh slot and the ninth slot, and the front side plate module, the middle side plate module and the rear side plate module are fixed by the plate fastening device.

[0030] Furthermore, side plate stiffening rib buckles are fixedly connected to the second rectangular tube, the side plate vertical ribs and the fifth square tube. The side plate stiffening rib buckles are used to wrap the stiffening ribs of the side plate and are fixedly connected by bolts.

[0031] Furthermore, the rear edge wrap of the bottom plate is composed of a sixth square tube and a fourth triangular steel welded together, and a twelfth slot for inserting the bottom plate is formed between the sixth square tube and the fourth triangular steel.

[0032] The second square tube, the fourth square tube and the sixth square tube are welded to form an outer rectangular frame. The first channel steel, the second channel steel and the sixth square tube are welded to form an inner rectangular frame. The bottom longitudinal beam is welded between the first channel steel and the sixth square tube. The bottom cross beam is welded between the second channel steel and the bottom longitudinal beam.

[0033] Two bottom plate cross wraps are also welded between the second channel steels on both sides. The two bottom plate cross wraps divide the bottom end frame module into three modules, namely the front bottom end frame module, the middle bottom end frame module and the rear bottom end frame module. The bottom plate is correspondingly divided into the front bottom plate module, the middle bottom plate module and the rear bottom plate module.

[0034] The front bottom end frame module is formed by surrounding the front plate lower cross beam, the side plate lower cross beam and the bottom plate cross wrap. The middle bottom end frame module is formed by surrounding the side plate lower cross beam and the bottom plate cross wrap. The rear bottom end frame module is formed by surrounding the side plate lower cross beam, the bottom plate cross wrap and the rear edge wrap of the bottom plate.

[0035] The horizontal edge of the bottom plate is a T-shaped structure formed by welding two fifth angle steels, and a thirteenth slot and a fourteenth slot for inserting the bottom plate are respectively formed on both sides of the horizontal edge of the bottom plate;

[0036] The front module of the bottom plate is inserted into the fifth slot, the eighth slot and the thirteenth slot, the middle module of the bottom plate is inserted into the eighth slot, the thirteenth slot and the fourteenth slot, and the rear module of the bottom plate is inserted into the eighth slot, the fourteenth slot and the twelfth slot.

[0037] Furthermore, a plurality of the tail end longitudinal beams are welded between the upper cross beam at the tail end and the lower cross beam at the tail end, and a plurality of the tail end cross beams are welded and connected between the tail end longitudinal beams;

[0038] The top end of the tail end column is movably connected to the side plate upper cross beam through an upper lock;

[0039] The lower cross beam at the tail end is detachably connected to the rear edge of the bottom plate through a lower hook lock;

[0040] The four sides of the rear plate are inserted into the circumferential slots formed by the upper cross beam at the tail end, the lower cross beam at the tail end and the two tail end columns, and the rear plate is fixed by the plate fastening device.

[0041] Furthermore, the plate fastening device includes a nut and a bolt in threaded cooperation;

[0042] The nut is welded to the surfaces of the front end frame module, the side end frame module and the tail end frame module located on the inner side of the carriage;

[0043] The bolt is in threaded cooperation with the nut and fixes the plate in the thickness direction of the plate.

[0044] Furthermore, the plate fastening device further includes a buffer pad; the buffer pad is clamped between the bolt and the plate.

[0045] In addition, the present invention also provides a modular heavy-duty truck carriage, and the modular heavy-duty truck carriage includes the above metal frame and plates;

[0046] The plates adopt composite material plates and include a front end plate, side plates, a bottom plate and a tail plate; the front end plate is inserted into the photo frame structure of the front end frame module and fixed by the plate fastening device; the side plates are inserted into the photo frame structures of the side end frame modules and fixed by the plate fastening device; the bottom plate is inserted into the photo frame structure of the bottom end frame module and fixed by the plate fastening device; the tail plate is inserted into the photo frame structure of the tail end frame module and fixed by the plate fastening device.

[0047] Compared with the prior art, the utility model has the following beneficial effects:

[0048] 1. The above metal frame is used for a modular heavy-duty truck carriage and includes a front-end frame module, side-end frame modules, bottom-end frame modules, and a rear-end frame module. Each module forms a photo-frame structure, enabling the assembly of each carriage panel through plug-in connection, improving the integrity and load-bearing capacity of the carriage; the metal profiles used are all standard channel steels, square tubes, angle steels, and steel plates, with simple processing techniques and welding methods.

[0049] 2. The side plates and bottom plates forming the carriage body both adopt a segmented design. The carriage body is assembled by plugging multiple composite material plates and a modular metal frame through photo-frame connection. The damaged carriage plates can be replaced independently, with low maintenance costs and strong maintainability for the carriage body.

[0050] 3. Compared with traditional metal carriage bodies, the metal frame improves the utilization rate of standard profiles, reduces the welding workload, and is assembled with composite material wall panels through photo-frame plug-in connection, with a simple assembly process. The overall weight of the carriage can be reduced by more than 30%; while ensuring the light weight of the carriage, it meets the requirements of high load-bearing and high strength for heavy-duty carriages, and can also improve the assembly efficiency and processing production efficiency.

[0051] 4. After the plates forming the carriage body are assembled by photo-frame plug-in connection, they are further fixed to the carriage frame through plate fastening devices, avoiding the method of fixing by drilling holes in the plates, reducing plate damage, increasing the stability of the carriage plates during use, and improving the overall durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic structural diagram of a metal frame for a modular heavy-duty truck carriage;

[0053] Figure 2 is a schematic structural diagram of a modular heavy-duty truck carriage;

[0054] Figure 3 is a cross-sectional view of the front panel upper crossbeam, rear-end upper crossbeam, rear-end upright column, and side panel upper crossbeam;

[0055] Figure 4 is a cross-sectional view of the front panel lower crossbeam and side panel lower crossbeam;

[0056] Figure 5 is a cross-sectional view of the front upright column;

[0057] Figure 6 is a cross-sectional view of the rear edge of the bottom plate;

[0058] Figure 7 is a cross-sectional view of the rear upright column;

[0059] Figure 8 Schematic diagram of the plate fastening device;

[0060] Figure 9 Cross-sectional view of the horizontal edge wrapping of the bottom plate;

[0061] Figure 10 Three-view drawing of the vertical ribs of the side plate. Specific implementation manners

[0062] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0063] The embodiments of the present utility model provide a modular heavy-duty truck carriage and its metal frame, as Figure 1 and Figure 2 shown in the structure. The modular heavy-duty truck carriage includes a metal frame and plates; the metal frame includes a front-end frame module 1, two side-end frame modules 2, a bottom-end frame module 3, a tail-end frame module 4, and a plate fastening device 5; the plates form the carriage body, all of which are composite material plates and are composed of a front plate, side plates, a bottom plate, and a tail plate; the front plate is inserted into the photo-frame structure of the front-end frame module and is fixed by the plate fastening device; the side plates are inserted into the photo-frame structures of the side-end frame modules and are fixed by the plate fastening device; the bottom plate is inserted into the photo-frame structure of the bottom-end frame module and is fixed by the plate fastening device; the tail plate is inserted into the photo-frame structure of the tail-end frame module and is fixed by the plate fastening device.

[0064] As Figure 1 shown, in the metal frame constituting the modular heavy-duty truck carriage, the tail-end frame module is laid flat horizontally at the bottom as the installation basis for the front-end frame module, two side-end frame modules, and the tail-end frame module; the front-end frame module, side-end frame modules, and tail-end frame module are arranged vertically; the front-end frame module and the tail-end frame module are arranged opposite to each other along the length direction of the carriage; the two side-end frame modules are arranged opposite to each other along the width direction of the carriage; the front-end frame module is located on the side of the vehicle head; the tail-end frame module is located on the side of the vehicle tail; as Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 shown, each module is formed by combining and welding metal profiles, and the metal profiles are square tubes, channel steels, angle steels, and steel plates;

[0065] The bottom end of the front-end frame module is fixedly connected to the front end of the bottom-end frame module; the front-end frame module includes a photo-frame structure formed by fixedly connecting two front vertical columns 11, a front upper cross beam 12, and a front lower cross beam 13; as Figure 1 and Figure 5 shown, the two front vertical columns 11 are symmetrically arranged, and the front vertical column is formed by welding a first rectangular tube, a second rectangular tube, a first steel plate, and a second steel plate; in Figure 5 it, the first rectangular tube is located on the left side, the length direction of the first rectangular tube is the same as the width direction of the second rectangular tube and both are the width direction of the carriage, the width direction of the first rectangular tube and the length direction of the second rectangular tube are both the length direction of the carriage, the second rectangular tube is located on the right side, the first steel plate is located on the right side, and the second steel plate is located on the left side of the first steel plate; the first rectangular tube is welded to the second rectangular tube; the first steel plate is arranged parallel to the second rectangular tube and is welded to the first rectangular tube, and a first slot for inserting the front side of the side plate is formed between the first steel plate and the second rectangular tube; the second steel plate is arranged parallel to the first rectangular tube and is welded to the first steel plate, and a second slot for inserting the side edge of the front end plate is formed among the first steel plate, the second steel plate, and the first rectangular tube; as Figure 1 、 Figure 2 、 Figure 3 shown, the front upper cross beam is composed of welding a first square tube and a first triangular steel; a third slot for inserting the top edge of the front end plate is formed between the first triangular steel and the first square tube; as Figure 1 、 Figure 2 、 Figure 4 shown, the front lower cross beam is formed by welding a second square tube, a first channel steel, a third steel plate, and a fourth steel plate; in Figure 4 it, the second square tube is located on the left side of the first channel steel, and the third steel plate is located on the left side of the fourth steel plate; the first channel steel is welded to the rear side of the second square tube; the third steel plate is arranged vertically and parallel to the second square tube and is welded to the top surface of the first channel steel, and a fourth slot for inserting the bottom edge of the front end plate is formed between the third steel plate and the second square tube; the fourth steel plate is arranged horizontally and perpendicularly welded to the rear side of the third steel plate, and a fifth slot for inserting the front edge of the bottom plate is formed among the fourth steel plate, the third steel plate, and the first channel steel; as Figure 2 shown, the four sides of the front end plate are inserted into the second slot, the third slot, and the fourth slot, and the front end plate is fixed using a plate fastening device; the two first rectangular tubes, the first square tube, and the second square tube are welded to form a rectangular frame. The front-end frame module further includes a front cross beam 14 and a front longitudinal beam 16, as Figure 1As shown, there are 2 front crossbeams and 2 front longitudinal beams welded in the front-end frame module; the front crossbeams are welded and connected between two first rectangular tubes; the front longitudinal beams are welded and connected between the front crossbeams and the second square tube; both the front crossbeams and the front longitudinal beams are made of channel steel; the front crossbeams are provided with two front plate stiffening rib buckles 15; the front plate stiffening rib buckles wrap the front plate stiffening ribs and are fixedly connected to the front crossbeams by bolts.

[0066] As Figure 1 shown, 2 side-end frame modules are symmetrically installed on both sides of the bottom-end frame module and are fixedly connected to the front-end frame module at the front; the side-end frame module is a photo-frame structure fixedly connected by a front column 11, a side plate upper crossbeam 21, a side plate lower crossbeam 23, side plate vertical ribs 22 and a rear column 24; the side-end frame module shares the front column with the front-end frame module; the side plate upper crossbeam is composed of a third square tube and a second triangular steel combined and welded, and a sixth slot for inserting the top edge of the side plate can be formed between the third square tube and the second triangular steel; reference can be made to Figure 3 and a sixth slot for inserting the top edge of the side plate is formed between the third square tube and the second triangular steel; the side plate lower crossbeam is welded by a fourth square tube, a second channel steel, a fifth steel plate and a sixth steel plate, and reference can be made to Figure 4 ; the second channel steel is welded and connected to the inner side surface of the fourth square tube; the fifth steel plate is arranged vertically and parallel to the fourth square tube and is welded and connected to the top surface of the second channel steel, and a seventh slot for inserting the bottom edge of the side plate is formed between the fifth steel plate and the fourth square tube; the sixth steel plate is arranged horizontally and is perpendicularly welded to the inner side surface of the fifth steel plate, and an eighth slot for inserting the side edge of the bottom plate is formed among the fifth steel plate, the sixth steel plate and the second channel steel; as Figure 7 shown, the rear column is formed by combining and welding a fifth square tube and a third triangular steel, and a ninth slot for inserting the rear edge of the side plate is formed between the top surface of the fifth square tube and the third triangular steel; the second rectangular tube, the third square tube, the fourth square tube and the fifth square tube are welded to form a rectangular frame; two side plate vertical ribs are welded and connected between the third square tube and the fourth square tube; the side plate vertical ribs divide the side-end frame module into three modules, namely the side-end frame front module, the side-end frame middle module and the side-end frame rear module; the side plates are correspondingly divided into the side plate front module, the side plate middle module and the side plate rear module; as Figure 10As shown, the side plate vertical rib is welded by a third channel steel, a seventh steel plate and a plurality of connecting rib plates. The opening of the third channel steel faces the outside of the carriage, and a plurality of connecting rib plates are distributed at intervals along the vertical direction on the inner side surface; the number of connecting rib plates can be 13; the outer side surface of the seventh steel plate is welded to the connecting rib plate; a tenth slot for inserting the rear side of the front side plate module and the rear side of the middle side plate module, and an eleventh slot for inserting the front side of the middle side plate module and the front side of the rear side plate module are formed between the third channel steel and the seventh steel plate on both sides of the connecting rib plate; adopting the above structure for the side plate vertical rib can avoid the weld from contacting the plate, reducing the assembly error caused by welding; the front side plate module is inserted into the first slot, the sixth slot, the seventh slot and the tenth slot, the middle side plate module is inserted into the eleventh slot, the sixth slot, the seventh slot and the tenth slot, and the rear side plate module is inserted into the eleventh slot, the sixth slot, the seventh slot and the ninth slot, and the front side plate module, the middle side plate module and the rear side plate module are fixed by a plate fastening device. Side plate reinforcing rib buckles 25 are fixedly connected to the second rectangular tube, the side plate vertical rib and the fifth square tube; the side plate reinforcing rib buckle is used to wrap the reinforcing rib of the side plate and is fixedly connected by bolts.

[0067] As Figure 1 and Figure 2 shown, the bottom frame module is a photo frame structure fixedly connected by a front plate lower cross beam 13, a bottom plate rear edge wrap 33, a bottom plate transverse wrap 34, a side plate lower cross beam 23, a bottom cross beam 31 and a bottom longitudinal beam 32; as Figure 6 shown, the bottom plate rear edge wrap is composed of a sixth square tube and a fourth triangular steel combined and welded, and a twelfth slot for inserting the bottom plate edge is formed between the sixth square tube and the fourth triangular steel; the second square tube, the fourth square tube and the sixth square tube are welded to form an outer rectangular frame, and the first channel steel, the second channel steel and the sixth square tube are welded to form an inner rectangular frame; a bottom longitudinal beam is welded between the first channel steel and the sixth square tube; a bottom cross beam is welded between the second channel steel and the bottom longitudinal beam; there are 36 cross beams and 2 longitudinal beams at the bottom; two bottom plate transverse wraps are also welded between the second channel steels on both sides, and the two bottom plate transverse wraps divide the bottom frame module into 3 modules, namely the front bottom frame module, the middle bottom frame module and the rear bottom frame module, and the bottom plate is correspondingly divided into the front bottom plate module, the middle bottom plate module and the rear bottom plate module; the front bottom frame module is formed by surrounding the front plate lower cross beam, the side plate lower cross beam and the bottom plate transverse wrap, the middle bottom frame module is formed by surrounding the side plate lower cross beam and the bottom plate transverse wrap, and the rear bottom frame module is formed by surrounding the side plate lower cross beam, the bottom plate transverse wrap and the bottom plate rear edge wrap; as Figure 9 shown, the bottom plate transverse wrap is a T-shaped structure formed by combining two fifth triangular steels, and a thirteenth slot and a fourteenth slot for inserting the bottom plate are respectively formed on both sides of the bottom plate transverse wrap; as Figure 2As shown, the front module of the bottom plate is inserted into the fifth slot, the eighth slot, and the thirteenth slot. The middle module of the bottom plate is inserted into the eighth slot, the thirteenth slot, and the fourteenth slot. The rear module of the bottom plate is inserted into the eighth slot, the fourteenth slot, and the twelfth slot.

[0068] The tail-end frame module is arranged opposite to the front-end frame module, with its top end movably connected to the top end of the side-end frame module and its bottom end movably connected to the bottom-end frame module. The tail-end frame module includes a photo-frame structure formed by fixedly connecting the upper crossbeam 41 at the tail end, the lower crossbeam at the tail end, and two tail-end columns 42. A plurality of tail-end longitudinal beams 43 are welded between the upper crossbeam at the tail end and the lower crossbeam at the tail end, and a plurality of tail-end crossbeams 44 are welded between the tail-end longitudinal beams. There is 1 tail-end crossbeam 44 and 3 tail-end longitudinal beams at the tail end. The two tail-end columns are symmetrically arranged. The structures of the upper crossbeam 41 at the tail end and the tail-end columns can be referred to Figure 3 ; The top end of the tail-end column is movably connected to the side plate upper crossbeam through an upper locking buckle. The lower crossbeam at the tail end is detachably connected to the rear edge of the bottom plate through a lower hook lock. The four sides of the rear plate are inserted into the circumferential slots formed by the upper crossbeam at the tail end, the lower crossbeam at the tail end, and the two tail-end columns, and the rear plate is fixed using a plate fastening device. As Figure 1 , Figure 2 shown, the front-end frame module 1, the side-end frame module 2, and the bottom-end frame module 3 are connected by welding, and the tail-end frame module 4 is connected to the whole through an upper locking buckle and a lower hook lock to jointly form a metal frame for a heavy truck.

[0069] The plate fastening device is fixedly installed on the front-end frame module, the side-end frame module, and the tail-end frame module for fixing the plates inserted into each photo-frame structure. As Figure 8 shown, the plate fastening device includes a buffer pad, and a nut and a bolt with a threaded fit. The nut is welded to the surfaces of the front-end frame module, the side-end frame module, and the tail-end frame module on the inner side of the carriage. The bolt is in threaded fit with the nut and fixes the plate in the thickness direction of the plate. The buffer pad is clamped between the end of the bolt and the plate.

[0070] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A metal frame for a modular heavy-duty truck compartment, characterized in that: It includes a front frame module, two side frame modules, a bottom frame module, a rear frame module and a plate fastening device; The bottom end of the front frame module is fixedly connected to the front end of the bottom frame module; the front frame module includes a photo frame structure consisting of two front uprights, a front plate upper crossbeam and a front plate lower crossbeam fixedly connected; The two side frame modules are symmetrically installed on both sides of the bottom frame module, and the front end is fixedly connected to the front frame module; the side frame module is a photo frame structure composed of the front column, the upper beam of the side plate, the lower beam of the side plate, the vertical ribs of the side plate and the rear column fixedly connected; The bottom frame module is a photo frame structure consisting of the front plate lower cross beam, the bottom plate rear edge, the bottom plate horizontal edge, the side plate lower cross beam, the bottom cross beam and the bottom longitudinal beam fixedly connected; The tail end frame module is arranged opposite to the front end frame module, the top end is movably connected to the top end of the side end frame module, and the bottom end is movably connected to the bottom end frame module; the tail end frame module includes a photo frame structure consisting of a tail end upper crossbeam, a tail end lower crossbeam and two tail end columns fixedly connected; The plate fastening device is fixedly mounted on the front end frame module, the side end frame module and the rear end frame module, and is used to fix the plates inserted into each photo frame structure.

2. The metal frame according to claim 1, characterized in that: The front pillar is formed by welding a first rectangular tube, a second rectangular tube, a first steel plate and a second steel plate; The first rectangular tube is welded to the second rectangular tube; the first steel plate is arranged in parallel with the second rectangular tube and is welded to the first rectangular tube, and a first slot for inserting the front edge of the side plate is formed between the first steel plate and the second rectangular tube; the second steel plate is arranged in parallel with the first rectangular tube and is welded to the first steel plate, and a second slot for inserting the side edge of the front end plate is formed between the first steel plate, the second steel plate and the first rectangular tube; The crossbeam on the front plate is formed by welding a first square tube and a first triangular steel; a third slot for inserting the top edge of the front end plate is formed between the first triangular steel and the first square tube; The lower cross beam of the front plate is welded by the second square tube, the first channel steel, the third steel plate and the fourth steel plate; the first channel steel is welded to the rear side surface of the second square tube; the third steel plate is arranged in the vertical direction and is parallel to the second square tube, and is welded to the top surface of the first channel steel, and a fourth slot for inserting the bottom edge of the front end plate is formed between the third steel plate and the second square tube; the fourth steel plate is arranged horizontally and is vertically welded to the rear side surface of the third steel plate, and a fifth slot for inserting the front edge of the bottom plate is formed between the fourth steel plate, the third steel plate and the first channel steel; The four sides of the front end plate are inserted into the second slot, the third slot and the fourth slot, and the front end plate is fixed using the plate fastening device; The two first rectangular tubes, the first square tube and the second square tube are welded to form a rectangular frame.

3. The metal frame according to claim 2, characterized in that: The front frame module also includes a front crossbeam and a front longitudinal beam; The front end cross beam is welded and connected between the two first rectangular tubes; The front longitudinal beam is welded and connected between the front cross beam and the second square tube; The front end cross beam and the front end longitudinal beam are both made of channel steel; The front end cross beam is provided with two front plate reinforcing rib buckles; The front plate reinforcement rib buckle wraps the front plate reinforcement rib and is fixedly connected to the front end cross beam by bolts.

4. The metal frame according to claim 2, characterized in that: The cross beam on the side plate is formed by welding a third tube and a second triangular steel, and a sixth slot for inserting the top edge of the side plate is formed between the third tube and the second triangular steel; The lower cross beam of the side plate is welded by a fourth square tube, a second channel steel, a fifth steel plate and a sixth steel plate; the second channel steel is welded to the inner side surface of the fourth square tube; the fifth steel plate is arranged in a vertical direction and is parallel to the fourth square tube, and is welded to the top surface of the second channel steel, and a seventh slot for inserting the bottom edge of the side plate is formed between the fifth steel plate and the fourth square tube; the sixth steel plate is arranged horizontally and is vertically welded to the inner side surface of the fifth steel plate, and an eighth slot for inserting the side edge of the bottom plate is formed between the fifth steel plate, the sixth steel plate and the second channel steel; The rear upright column is formed by welding a fifth square tube and a third triangular steel, and a ninth slot for inserting into the rear edge of the side panel is formed between the top surface of the fifth square tube and the third triangular steel; The second rectangular tube, the third tube, the fourth square tube and the fifth square tube are welded to form a rectangular frame; two side panel vertical ribs are welded and connected between the third tube and the fourth square tube; the side panel vertical ribs separate the side end frame module into three modules, namely, the side end frame front module, the side end frame middle module and the side end frame rear module; the side panel is correspondingly divided into the side panel front module, the side panel middle module and the side panel rear module; The side panel vertical ribs are welded by the third channel steel, the seventh steel plate and a plurality of connecting ribs, the opening of the third channel steel faces the outside of the car body, and a plurality of connecting ribs are spaced apart on the inner side surface in the vertical direction; the outer side surface of the seventh steel plate is welded to the connecting ribs; a tenth slot for inserting the rear edge of the side panel front module and the rear edge of the side panel middle module, and an eleventh slot for inserting the front edge of the side panel middle module and the front edge of the side panel rear module are formed between the third channel steel and the seventh steel plate on both sides of the connecting ribs; The side panel front module is inserted into the first slot, the sixth slot, the seventh slot and the tenth slot, the side panel middle module is inserted into the eleventh slot, the sixth slot, the seventh slot and the tenth slot, the side panel rear module is inserted into the eleventh slot, the sixth slot, the seventh slot and the ninth slot, and the plate fastening device is used to fix the side panel front module, the side panel middle module and the side panel rear module.

5. The metal frame according to claim 4, characterized in that: The second rectangular tube, the side panel vertical ribs and the fifth square tube are all fixedly connected with side panel reinforcement rib buckles; the side panel reinforcement rib buckles are used to wrap the reinforcement ribs of the side panels and are fixedly connected by bolts.

6. The metal frame according to claim 4, characterized in that: The rear edge of the bottom plate is formed by welding a sixth square tube and a fourth triangular steel, and a twelfth slot for inserting the bottom plate is formed between the sixth square tube and the fourth triangular steel; The second square tube, the fourth square tube and the sixth square tube are welded to form an outer rectangular frame, and the first channel steel, the second channel steel and the sixth square tube are welded to form an inner rectangular frame; the bottom longitudinal beam is welded between the first channel steel and the sixth square tube; the bottom cross beam is welded between the second channel steel and the bottom longitudinal beam; Two bottom plate transverse edges are welded between the second channel steels on both sides, and the two bottom plate transverse edges separate the bottom frame module into three modules, namely, a bottom frame front module, a bottom frame middle module and a bottom frame rear module, and the bottom plate is correspondingly divided into a bottom plate front module, a bottom plate middle module and a bottom plate rear module; The front module of the bottom frame is formed by the lower cross beam of the front plate, the lower cross beam of the side plate and the horizontal edge of the bottom plate, the middle module of the bottom frame is formed by the lower cross beam of the side plate and the horizontal edge of the bottom plate, and the rear module of the bottom frame is formed by the lower cross beam of the side plate, the horizontal edge of the bottom plate and the rear edge of the bottom plate; The bottom plate transverse edge is a T-shaped structure formed by welding two fifth triangular steels, and a thirteenth slot and a fourteenth slot for inserting the bottom plate are respectively formed on both sides of the bottom plate transverse edge; The front module of the baseboard is inserted into the fifth slot, the eighth slot and the thirteenth slot, the middle module of the baseboard is inserted into the eighth slot, the thirteenth slot and the fourteenth slot, and the rear module of the baseboard is inserted into the eighth slot, the fourteenth slot and the twelfth slot.

7. The metal frame according to claim 6, characterized in that: A plurality of tail end longitudinal beams are welded between the tail end upper cross beam and the tail end lower cross beam, and a plurality of tail end cross beams are welded and connected between the tail end longitudinal beams; The top end of the rear end column is movably connected to the crossbeam on the side plate through an upper lock; The lower cross beam at the rear end is detachably connected to the back edge of the bottom plate by means of a lower hook lock; The four sides of the rear plate are inserted into the circumferential slots formed by the tail end upper cross beam, the tail end lower cross beam and the two tail end columns, and the rear plate is fixed by using the plate fastening device.

8. The metal frame according to any one of claims 1 to 7, characterized in that: The plate fastening device comprises a nut and a bolt with threaded fit; The nut is welded to the surfaces of the front end frame module, the side end frame module and the rear end frame module located on the inner side of the vehicle compartment; The bolt is threadably matched with the nut and fixes the plate in the thickness direction of the plate.

9. The metal frame according to claim 8, characterized in that The plate fastening device also includes a buffer pad; the buffer pad is clamped between the bolt and the plate.

10. A modular heavy-duty truck compartment, characterized in that: comprising a metal frame and a plate as described in any one of claims 1 to 9; The plate material is a composite material plate and includes a front end plate, a side plate, a bottom plate and a tail plate; the front end plate is inserted into the frame structure of the front end frame module and fixed by a plate fastening device; the side plate is inserted into the frame structure of the side end frame module and fixed by a plate fastening device; the bottom plate is inserted into the frame structure of the bottom end frame module and fixed by a plate fastening device; the tail plate is inserted into the frame structure of the tail end frame module and fixed by a plate fastening device.

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