CN116853356A - Vehicle, cargo box, underframe assembly and assembly method thereof - Google Patents

Abstract

The invention discloses a vehicle, a cargo box of the vehicle, a chassis assembly and an assembling method, wherein the chassis assembly comprises a chassis and a bottom plate, the bottom plate is fixedly paved on the chassis, the chassis comprises a first side beam, a second side beam, a front side beam, a plurality of cross beams, a plurality of longitudinal beams and a plurality of corner brackets, the first side beam, the second side beam, the front side beam, the cross beams and the longitudinal beams are all U-shaped metal pieces, the front side beam is transversely connected between the front end of the first side beam and the front end of the second side beam, the cross beams are transversely fixed between the first side beam and the second side beam, the longitudinal beams are longitudinally fixed between the first side beam and the second side beam, and the longitudinal beams are fixedly connected to the lower part of the cross beams through the corner brackets. In this scheme, because first side rail, second side rail, preceding boundary beam, crossbeam and longeron are U type metalwork, can reduce the weight of chassis like this to through setting up the longeron in the lower part of crossbeam and fixed through angle sign indicating number and fastener, thereby reduce chassis deformation.

Description

Vehicle, cargo box, underframe assembly and assembly method thereof

Technical Field

The invention relates to the technical field of logistics, in particular to a vehicle, a cargo box, an underframe assembly and an assembly method thereof.

Background

The logistics means the whole process of planning, implementing and managing raw materials, semi-finished products, finished products or related information from the production place of the commodity to the consumption place of the commodity by means of transportation, storage, distribution and the like in order to meet the demands of customers at the lowest cost. With the continuous development of social economy, the globalization of economy is gradually developed, the modern logistics industry plays a role, and the modern logistics is also an important service industry for promoting the globalization of economy.

The container is an indispensable part in modern logistics, and can be used for loading various articles to be transported at one time through the huge capacity of the container, so that the efficiency of each transport is improved. The packing box usually comprises roof, curb plate, front bezel and back door etc. in the common packing box in market, the connection between each part adopts the welded mode, can not dismantle between each part, can only carry out empty container transportation by whole case when selling.

The patent application publication No. CN111017420a discloses a box and a chassis, a shipping method thereof, the chassis including a chassis main body including a longitudinally disposed side sill, a plurality of transversely disposed side sill, a front end beam transversely welded to a front end of the side sill, a rear end beam transversely welded to a rear end of the side sill, and two side sills longitudinally connected between an end of the front end beam and an end of the rear end beam. In this implementation, the bottom longitudinal beam is two, and two bottom longitudinal beams interval sets up, and the bottom cross beam is connected perpendicularly at the bottom longitudinal beam, and the bottom cross beam is along the length direction interval setting of bottom longitudinal beam for a plurality of, and the both ends of bottom cross beam are connected on the roof side rail. The welding connection mode has lower connection strength, and the bottom cross beam and the bottom longitudinal beam are easy to deform after long-time use.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a vehicle, a cargo box, an underframe assembly and an assembly method thereof, wherein a cross beam and a longitudinal beam on the underframe assembly are connected by bolts, so that deformation of the underframe assembly is reduced, the overall mass is light, and the assembly is accurate and rapid.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a chassis assembly of goods railway carriage or compartment, includes chassis and bottom plate, and the bottom plate is fixed to be laid on the chassis, the chassis includes first side rail, second side rail, front side rail, a plurality of crossbeam, a plurality of longeron and a plurality of bight, first side rail, second side rail, front side rail, crossbeam and longeron are U type metalwork, the front side rail transversely sets up, transversely is connected with the front side rail between the front end of first side rail and the front end of second side rail, and a plurality of crossbeams are transversely fixed between first side rail and second side rail, and a plurality of longerons are vertically fixed between first side rail and second side rail, and the longeron passes through bight fixed connection in the lower part of crossbeam, and a side of bight passes through fastener and longeron fixed connection, and another side of bight passes through fastener and crossbeam fixed connection. Because first side rail, second side rail, preceding boundary beam, crossbeam and longeron are U type metalwork, can reduce the weight of chassis like this to through setting up the longeron in the lower part of crossbeam and fixed through angle sign indicating number and fastener, thereby reduce chassis deformation.

Preferably, the U-shaped grooves of the first side beam, the second side beam and the front side beam are all arranged inwards, and the top surfaces of the first side beam, the second side beam, the front side beam and the cross beams are located on the same plane.

Preferably, a notch is formed in the middle of the second side beam, a third U-shaped piece is respectively arranged at the front end and the rear end of the notch, and the third U-shaped piece is fixedly connected with the second side beam and forms a positioning hole b with the second side beam.

Preferably, a baffle for shielding the recess is arranged between the two third U-shaped pieces.

Preferably, the height of the baffle is lower than the height of the top surface of the second side rail, so that the side door assembly on the second side rail assembly is supported by the baffle.

Preferably, the U-shaped reinforcing piece is arranged in the longitudinal beam, and the corner brace, the longitudinal beam and the U-shaped reinforcing piece are fixedly connected through a fastener. The connection position of the longitudinal beam and the corner bracket is reinforced.

Preferably, a U-shaped reinforcing member is arranged in the cross beam, and the corner brace, the cross beam and the U-shaped reinforcing member are fixedly connected through fasteners. Thus strengthening the connection position of the beam and the corner brace.

A cargo box comprising a chassis assembly as described above.

The assembling method of the cargo box comprises the steps that the top surface of the first side beam of the underframe assembly is provided with a plurality of positioning holes a; the top surface of the second side beam is provided with a plurality of positioning holes b; the top surface of the front side beam is provided with a plurality of positioning holes c, the front plate assembly of the cargo box is provided with upright posts corresponding to the positioning holes c on the front side beam, and the lower ends of the upright posts of the front plate assembly of the cargo box are inserted into the positioning holes c on the front side beam and fixedly connected with the front side beam of the underframe assembly through fasteners; the first side plate assembly of the cargo box is provided with an upright post corresponding to the positioning hole a on the first side beam, and the lower end of the upright post of the first side plate assembly of the cargo box is inserted into the positioning hole a of the first side beam and fixedly connected with the first side beam of the underframe assembly through a fastener; the second side plate assembly of the cargo box is provided with a U-shaped metal piece corresponding to the locating hole b on the second side beam, the lower end of the U-shaped metal piece of the second side plate assembly of the cargo box is inserted into the locating hole b on the second side beam, and the second side plate assembly of the cargo box is fixedly connected with the second side beam of the underframe assembly through a fastener; the rear door assembly of the cargo box is fixedly arranged at the rear end of the underframe assembly through a fastener. Therefore, the front plate assembly, the first side plate assembly, the second side plate assembly and the rear door assembly are arranged on the underframe assembly in a detachable and spliced mode, so that the sea transportation is facilitated, and the sea transportation cost is reduced.

A vehicle comprising a cargo compartment as described above.

The invention has the following beneficial effects due to the adoption of the technical scheme: according to the invention, the first side beam, the second side beam, the front side beam, the cross beam and the longitudinal beam in the underframe assembly are all arranged as the U-shaped metal pieces, so that the weight of the underframe can be reduced, and the longitudinal beam is arranged at the lower part of the cross beam and fixed through the corner connector and the fastener, so that the deformation of the underframe is reduced, and the U-shaped metal pieces are integrally formed by stamping, so that the cost is low.

Drawings

FIG. 1 is a schematic view of the structure of a cargo compartment;

FIG. 2 is an exploded view of the cargo box;

FIG. 3 is a schematic structural view of the floor assembly;

FIG. 4 is a schematic view of the structure of FIG. 3 at another angle;

FIG. 5 is a schematic structural view of the top plate assembly;

FIG. 6 is a schematic view of the top plate assembly (with the tail plate, top plate, first metal bead, second metal bead, and third metal bead removed);

fig. 7 is a schematic structural view of a first corrugated board;

fig. 8 is a schematic structural view of a second corrugated board;

FIG. 9 is a schematic view of the structure of FIG. 8 at another angle;

FIG. 10 is a schematic structural view of the front plate assembly;

FIG. 11 is a schematic structural view of the first side panel assembly;

FIG. 12 is a schematic structural view of a second side plate assembly;

FIG. 13 is a schematic structural view of a side door assembly;

FIG. 14 is a schematic cross-sectional view of FIG. 13;

FIG. 15 is a schematic structural view of a rear door assembly;

FIG. 16 is a schematic view of a positioning post;

fig. 17 is a schematic cross-sectional view of a positioning post.

Reference numerals:

100. a cargo compartment;

1. a chassis assembly; 11. a chassis; 111. a first side rail; 1111. a positioning hole a; 112. a second side rail; 1121. positioning holes b; 1123. a notch; 1124. a third U-shaped piece; 1125. a baffle; 113. a front side beam; 1131. a positioning hole c; 115. a cross beam; 116. a longitudinal beam; 117. an angle code; 12. a bottom plate;

2. a top cover assembly; 21. a top plate; 211. a first metal wrapping; 212. a second metal wrapping; 2121. rain eaves; 213. a third metal wrapping; 221. a first bending piece; 2211. a first connection surface; 2212. a second connection surface; 22121. a positioning hole d; 2213. a third connection surface; 2214. a fourth connection surface; 222. a second bending piece; 2221. a fifth connection surface; 2222. a sixth connection surface; 22221. a positioning hole e; 2223. a seventh connection surface; 2224. an eighth connection surface; 223. a third bending member; 2231. a ninth connection surface; 2232. a tenth connecting surface; 22321. a positioning hole f; 2233. an eleventh connection surface; 2234. a twelfth connection surface; 2235. corner posts; 224. a tail plate;

3. A first side plate assembly;

4. a second side panel assembly; 41. a side door assembly; 411. a side door frame; 4111. a first connector; 4112. a second connector; 4113. a third connecting member; 4114. a fourth connecting member; 41141. a nineteenth connection surface; 41142. a twentieth connecting surface; 41143. a twenty-first connection surface; 41144. a twenty-second connection surface; 412. a side door panel; 413. a first U-shaped column;

5. a rear door assembly; 51. a rear door frame; 511. a seventh connection; 512. an eighth connecting member; 5121. a twenty-third connection surface; 5122. a twenty-fourth connection surface; 5123. a twenty-fifth connection surface; 5124. a twenty-sixth connection surface; 5125. a twenty-seventh connection surface; 513. a ninth link; 514. a tenth connecting member; 515. a second U-shaped column; 517. a fourth U-shaped piece; 518. a thirteenth connection member; 52. a rear door panel;

6. a front plate assembly;

7. positioning columns; 71. a fourth bending member; 72. a fifth bending member; 721. a twenty eighth connection surface; 722. a twenty-ninth connection surface; 723. a thirty-first connection face; 724. a thirty-first connection face; 73. positioning holes g;

8. a first corrugated board; 81. a first plate body; 811. a first L-shaped flange; 812. a second L-shaped flange; 82. a first sheet metal part; 83. a second sheet metal part; 831. a thirteenth connection surface; 832. a fourteenth connection surface; 833. a fifteenth connection surface;

9. A second corrugated board; 91. a second plate body; 911. a third L-shaped flanging; 912. right-angle welting; 92. a third sheet metal part; 93. a fourth sheet metal part; 931. a sixteenth connection surface; 932. seventeenth connection face; 933. an eighteenth connection surface; 94. a column;

10. and (5) reflecting paste.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

For clarity of description, in the present invention, when the carriage is mounted on the vehicle, one end where the vehicle head is located is the front, otherwise the rear, and the space formed by the carriage is the inner, otherwise the outer.

The invention discloses a vehicle, which comprises a cargo box 100 as shown in fig. 1 and 2, wherein a reflective sticker 10 is arranged around the cargo box 100.

In the present invention, as shown in fig. 1 and 2, the cargo box 100 includes: the novel door comprises a chassis assembly 1, a top cover assembly 2, a first side plate assembly 3, a second side plate assembly 4, a rear door assembly 5, a front plate assembly 6 and two positioning columns 7, wherein the first side plate assembly 3, the second side plate assembly 4, the rear door assembly 5, the front plate assembly 6 and the two positioning columns 7 are respectively and detachably connected with the chassis assembly 1, one positioning column 7 is arranged between the first side plate assembly 3 and the front plate assembly 6, the other positioning column 7 is arranged between the second side plate assembly 4 and the front plate assembly 6, and the top cover assembly 2 is respectively and detachably connected with the first side plate assembly 3, the second side plate assembly 4, the rear door assembly 5, the front plate assembly 6 and the two positioning columns 7.

As shown in fig. 3 and fig. 4, the chassis assembly 1 includes a chassis 11 and a bottom plate 12, the bottom plate 12 is fixedly laid on the chassis 11, the chassis 11 includes a first side rail 111, a second side rail 112, a front side rail 113, a plurality of cross rails 115, a plurality of longitudinal rails 116 and a plurality of corner brackets 117, the first side rail 111, the second side rail 112, the front side rail 113, the cross rails 115 and the longitudinal rails 116 are all integrally formed U-shaped metal pieces, the front side rail 113 is transversely arranged, a front side rail 113 is transversely connected between the front end of the first side rail 111 and the front end of the second side rail 112, a plurality of cross rails 115 are transversely fixed between the first side rail 111 and the second side rail 112, a plurality of longitudinal rails 116 are longitudinally fixed between the first side rail 111 and the second side rail 112, the longitudinal rails 116 are fixedly connected to the lower portion of the cross rails 115 through corner brackets 117, one side of the corner brackets 117 is fixedly connected with the longitudinal rails 116 through fasteners, and the other side of the corner brackets 117 is fixedly connected with the cross rails 115 through fasteners. The bottom plate 12 is a metal plate. Because the first side beam 111, the second side beam 112, the front side beam 113, the cross beam 115 and the longitudinal beam 116 are all U-shaped metal pieces formed by integral stamping, the weight of the underframe can be reduced while the production cost and the production difficulty are reduced, and the deformation of the underframe 11 is reduced by arranging the longitudinal beam 116 at the lower part of the cross beam 115 and fixing the longitudinal beam through the corner bracket 117 and a fastener.

The U-shaped grooves of the first side beam 111, the second side beam 112 and the front side beam 113 are all disposed inward, and the top surfaces of the first side beam 111, the second side beam 112, the front side beam 113 and the plurality of cross beams 115 are located on the same plane, so that the bottom plate 12 can be flatly and fixedly laid thereon.

Further, in order to increase the strength of the joint between the corner bracket 117 and the longitudinal beam 116, a U-shaped reinforcing member is arranged in the longitudinal beam 116, and the corner bracket 117, the longitudinal beam 116 and the U-shaped reinforcing member are fixedly connected through fasteners; in order to increase the strength of the joint between the corner bracket 117 and the beam 115, a U-shaped reinforcing member is arranged in the beam 115, and the corner bracket 117, the beam 115 and the U-shaped reinforcing member are fixedly connected through fasteners.

In the present invention, the top surface of the first side sill 111 is provided with a plurality of positioning holes a1111 for positioning and mounting the first side panel assembly 3. In this embodiment, since the second side plate assembly 4 includes the side door assembly 41, in order to install the side door assembly 41 on the second side plate assembly 4, a notch 1123 is formed in the middle of the second side plate assembly 112, a third U-shaped piece 1124 is respectively formed at the front and rear ends of the notch 1123, the third U-shaped piece 1124 is fixedly connected with the second side plate 112 and forms a positioning hole b1121 for positioning and installing the side door assembly 41 with the second side plate 112, a baffle 1125 for shielding the notch 1123 is disposed between the two third U-shaped pieces 1124, the height of the baffle 1125 is lower than that of the top surface of the second side plate assembly 112, and the baffle 1125 is an L-shaped connecting plate 1125 for supporting the bottom surface of the side door assembly 41. The top surface of the front side beam 113 is provided with a plurality of positioning holes c1131 for positioning and mounting the front plate assembly 6.

As shown in fig. 5 and 6, the top cover assembly 2 comprises a top plate 21, the top plate 21 is a light composite plate, the light composite plate is formed by preparing a PP honeycomb plate, the PP honeycomb plate solves a series of outstanding problems existing in the conventional logistics container, the light composite plate is different from the top plate formed by splicing conventional corrugated plates, the light composite plate is used in a whole, the whole weight of the box body is lightened, the compressive strength of the box body can be further improved, the assembly is facilitated by personnel, the joint is reduced, the tightness of the box body is enhanced, external rainwater and saline water are prevented from penetrating into the box body, the box body is not easy to erode based on the characteristics of the PP honeycomb plate, the heat preservation effect in the box body is good, and the box body is not easy to be interfered by external environment.

The top cover assembly 2 further comprises a first bending piece 221, a second bending piece 222, a third bending piece 223, a tail plate 224, a first metal wrapping edge 211, a second metal wrapping edge 212 and a third metal wrapping edge 213, wherein the first bending piece 221, the second bending piece 222 and the third bending piece 223 are fixedly connected, the first bending piece 221 and the second bending piece 222 are respectively arranged at the left side and the right side of the top plate 21, the third bending piece 223 is arranged at the front side of the top plate 21, the inner side of the first bending piece 221, the inner side of the second bending piece 222 and the inner side of the third bending piece 223 are respectively bent and fixed with the lower surface of the top plate 21 through fasteners, grooves are respectively formed among the first bending piece 221, the second bending piece 222, the third bending piece 223 and the lower surface of the top plate 21, vertical corner posts 2235 are respectively arranged at the left end and the right end of the third bending piece 223, the tail plate 224 is positioned above the top plate 21, the front side of the tail plate 224 is fixedly connected with the top plate 21, and the rear side of the tail plate 224 is protruded out of the top plate 21; the first metal binding 211, the second metal binding 212 and the third metal binding 213 are all L-shaped metal binding, one side surface of the first metal binding 211 is fixedly connected with the outer side surface of the first bending piece 221, the other side surface of the first metal binding 211 is fixedly connected with the upper surface of the top plate 21 through a fastener, one side surface of the second metal binding 212 is fixedly connected with the outer side surface of the second bending piece 222, the other side surface of the second metal binding 212 is fixedly connected with the upper surface of the top plate 21 through a fastener, one side surface of the third metal binding 213 is fixedly connected with the front side surface of the third bending piece 223, and the other side surface of the third metal binding 213 is fixedly connected with the upper surface of the top plate 21 through a fastener.

In the actual process of producing the top cover assembly 2, the first bending member 221, the second bending member 222, the third bending member 223, the first metal wrapping edge 211, the second metal wrapping edge 212 and the third metal wrapping edge 213 may be welded and fixed in advance, then the top plate 21 is inserted into the top plate installation space formed by the first bending member 221, the second bending member 222, the third bending member 223, the first metal wrapping edge 211, the second metal wrapping edge 212 and the third metal wrapping edge 213 from back to front, then the top plate 21 is respectively connected with the first bending member 221, the second bending member 222, the third bending member 223, the first metal wrapping edge 211, the second metal wrapping edge 212 and the third metal wrapping edge 213 through fasteners, and finally the tail plate 224 is fixed at the rear end of the top plate 21, and the tail plate 224 is fixedly connected between the rear end of the first metal wrapping edge 211 and the rear end of the second metal wrapping edge 212 through the tail plate 224, so that the tail plate 224 forms a water blocking area above the rear door assembly 41.

The first bending member 221 includes a first connection surface 2211, a second connection surface 2212, a third connection surface 2213 and a fourth connection surface 2214, the first connection surface 2211 and the third connection surface 2213 are vertically arranged, the first connection surface 2211 is located at the outer side of the third connection surface 2213, the second connection surface 2212 and the fourth connection surface 2214 are horizontally arranged, the lower end of the first connection surface 2211 and the lower end of the third connection surface 2213 are connected through the second connection surface 2212, the outer end of the fourth connection surface 2214 is connected with the upper end of the third connection surface 2213, the first connection surface 2211 is fixedly connected with the first metal wrapping edge 211, the fourth connection surface 2214 is fixedly connected with the lower surface of the top plate 21 through a fastener, and a plurality of positioning holes d22121 for positioning and mounting on the first side plate assembly 3 are formed in the second connection surface 2212.

The second bending piece 222 includes a fifth connection surface 2221, a sixth connection surface 2222, a seventh connection surface 2223 and an eighth connection surface 2224, the fifth connection surface 2221 and the seventh connection surface 2223 are vertically arranged, the fifth connection surface 2221 is located at the outer side of the seventh connection surface 2223, the sixth connection surface 2222 and the eighth connection surface 2224 are horizontally arranged, the lower end of the fifth connection surface 2221 and the lower end of the seventh connection surface 2223 are connected through the sixth connection surface 2222, the outer end of the eighth connection surface 2224 is connected with the upper end of the seventh connection surface 2223, the fifth connection surface 2221 is fixedly connected with the second metal wrapping edge 212, the eighth connection surface 2224 is fixed with the lower surface of the top plate 21 through a fastener, and a plurality of positioning holes e22221 for positioning and installing on the second side plate assembly 4 are formed in the sixth connection surface 2222.

The third bending member 223 includes a ninth connecting surface 2231, a tenth connecting surface 2232, an eleventh connecting surface 2233, and a twelfth connecting surface 2234, where the ninth connecting surface 2231 and the eleventh connecting surface 2233 are vertically disposed, the ninth connecting surface 2231 is located outside the eleventh connecting surface 2233, the tenth connecting surface 2232 and the twelfth connecting surface 2234 are horizontally disposed, the lower end of the ninth connecting surface 2231 and the lower end of the eleventh connecting surface 2233 are connected by the tenth connecting surface 2232, the outer end of the twelfth connecting surface 2234 is connected with the upper end of the eleventh connecting surface 2233, two corner posts 2235 are respectively disposed at the left and right ends of the tenth connecting surface 2232, the ninth connecting surface 2231 is fixedly connected with the third metal wrapping 213, the twelfth connecting surface 2234 is fixed with the lower surface of the top plate 21 by fasteners, and a plurality of positioning holes 223f 21 for positioning and installing on the front plate assembly 6 are formed on the tenth connecting surface 2232.

In the present invention, the installation position of the fastener for connecting the first metal binding 211 and the upper surface of the top plate 21 is offset from the installation position of the fastener for connecting the first bending piece 221 and the lower surface of the top plate 21; the mounting positions of the fasteners for connecting the second metal binding 212 to the upper surface of the top plate 21 are offset from the mounting positions of the fasteners for connecting the second bending piece 222 to the lower surface of the top plate 21; the mounting positions of the fasteners for connecting the third metal rims 213 and the upper surface of the top plate 21 are offset from the mounting positions of the fasteners for connecting the third turndown 223 and the lower surface of the top plate 21. In this way, the sealing performance of the case can be further enhanced, and external rainwater and brine can be prevented from penetrating into the case through the fastener on the upper surface of the top plate 21. Of course, glue or the like may be applied to the mounting position of the fastener to further enhance the sealing property of the case.

The second metal edge 212 is further provided with a rain edge 2121, the rain edge 2121 is arranged along the front-back direction, the inner side of the rain edge 2121 is fixedly connected with the second metal edge 212, the outer side of the rain edge 2121 is bent upwards to form a water guide groove between the rain edge 2121 and the second metal edge 212, and the rain edge 2121 is used for shielding the upper side of the side door assembly 41.

Because on traditional dismouting carriage, curb plate assembly, front bezel assembly's volume is great, and weight is heavier, generally need use lifting device when the dismouting. In order to facilitate the disassembly and assembly of the side plate assembly and the front plate assembly by a user, in the invention, the first side plate assembly 3 is formed by splicing a plurality of first corrugated plates 8 and a plurality of second corrugated plates 9. The second side plate assembly 4 is formed by splicing a side door assembly 41 and a plurality of first corrugated plates 8, and the plurality of first corrugated plates 8 are respectively positioned on the front side and the rear side of the side door assembly 41. The front plate assembly 6 is formed by splicing a plurality of first corrugated plates 8 and a plurality of second corrugated plates 9.

In order to facilitate disassembly and assembly, as shown in fig. 7, the first corrugated board 8 includes a first board body 81, a first sheet metal part 82 and a second sheet metal part 83, a groove is formed in the first sheet metal part 82, the upper end of the first board body 81 is fixedly disposed in the groove of the first sheet metal part 82, the second sheet metal part 83 includes a thirteenth connecting surface 831, a fourteenth connecting surface 832 and a fifteenth connecting surface 833 which are formed by sequentially bending, the thirteenth connecting surface 831 and the fifteenth connecting surface 833 are vertically disposed, the lower end of the thirteenth connecting surface 831 and the upper end of the fifteenth connecting surface 833 are connected through a fourteenth connecting surface 832, the lower end of the first board body 81 is fixedly disposed on the fourteenth connecting surface 832, the thirteenth connecting surface 831 is disposed on the inner side of the first board body 81 and fixedly connected with the first board body 81, the fifteenth connecting surface 833 is disposed on the outer side of the first board body 81, a first L-shaped flange 811 is disposed on the outer side of one vertical side of the first board body 81 and a second L-shaped flange 812 is disposed on the inner side of the other vertical side of the first board body. The first corrugated sheet 8 is secured to the roof assembly 2 of the cargo box 100 by a first sheet metal member 82, and the first corrugated sheet 8 is secured to the floor assembly 1 of the cargo box 100 by a second sheet metal member 83. The fastener for fixing the first corrugated board 8 and the top cover assembly 2 can be arranged on one side, close to the inner side of the container 100, of the groove on the first sheet metal part 82, the fastener is prevented from being exposed, and the whole appearance is attractive. The fourteenth connection face 832 of the second sheet metal member 83 can be placed on the bottom frame of the floor assembly 1, and covers the floor assembly 1 through the fifteenth connection face 833.

As shown in fig. 8 and 9, the second corrugated board 9 includes a second board body 91, a third sheet metal part 92, a fourth sheet metal part 93 and an upright post 94, a groove is provided on the third sheet metal part 92, the upper end of the second board body 91 is fixedly disposed in the groove of the third sheet metal part 92, the fourth sheet metal part 93 includes a sixteenth connecting surface 931, a seventeenth connecting surface 932 and an eighteenth connecting surface 933 which are formed by sequentially bending, the sixteenth connecting surface 931 and the eighteenth connecting surface 933 are vertically disposed, the lower end of the sixteenth connecting surface 931 and the upper end of the eighteenth connecting surface 933 are connected through the seventeenth connecting surface 932, the lower end of the second board body 91 is fixedly disposed on the seventeenth connecting surface 932, the sixteenth connecting surface 931 is disposed on the inner side of the second board body 91 and fixedly connected with the second board body 91, the outer side of the eighteenth connecting surface 933 is disposed on the outer side of the second board body 91, a third L-shaped flanging 911 is disposed on the outer side of one vertical side of the second board body 91, the other vertical side of the second board body is disposed facing inwards, the other vertical side of the second board body forms a right angle with the protruding edge 94, and the upright post 94 is disposed on the right angle assembly, and the upright post assembly is disposed between the upper end of the upright post 94 and the second board body and the upper end of the upright post 94, and the upright post assembly is disposed on the right angle assembly, and the right angle assembly is disposed between the upper end of the upright post 94 and the upper end of the second board body and the upright post 94.

The second corrugated sheet 9 is secured to the roof assembly 2 of the cargo box 100 by a third sheet metal member 92, and the second corrugated sheet 9 is secured to the floor assembly 1 of the cargo box 100 by a fourth sheet metal member 93. The fastener for fixing the second corrugated board 9 and the top cover assembly 2 can be arranged on one side, close to the inner side of the container 100, of the groove on the third sheet metal part 92, the fastener is prevented from being exposed, and the whole appearance is attractive. The seventeenth connection surface 932 of the fourth sheet metal member 93 can be placed on the bottom frame of the floor assembly 1, and covers the floor assembly 1 through the eighteenth connection surface 933.

Through setting up first corrugated board 8 and second corrugated board 9 to fixed being equipped with stand 94 on second corrugated board 9, thereby can reducing the splice seam between first corrugated board 8 and the second corrugated board 9, waterproof nature is better, and the L shape turn-ups of first corrugated board 8 and the L shape turn-ups of second corrugated board 9 can both play the effect of location, stand 94 can conveniently fix a position second corrugated board 9 on bottom plate assembly 1 and top cap assembly 2, it is more convenient to install, the fastener also can set up on the L shape turn-ups of first corrugated board 8 and second corrugated board 9, thereby make the fastener be located packing box 100, whole appearance is more pleasing to the eye.

In order to increase the strength of the first corrugated board 8 and the second corrugated board 9, a plurality of reinforcing members are fixedly arranged on the inner side of the first board body 81, and a plurality of reinforcing members are fixedly arranged on the inner side of the second board body 91.

In the present invention, as shown in fig. 11, the first side board assembly 3 is formed by splicing one first corrugated board 8 and three second corrugated boards 9. Two side surfaces of the second L-shaped flange 812 of the first corrugated board 8 are respectively clung to two adjacent side surfaces of the upright post 94 of the first second corrugated board 9 and are respectively fixedly connected through fasteners, two side surfaces of the third L-shaped flange 911 of the first second corrugated board 9 are respectively clung to two adjacent side surfaces of the upright post 94 of the second corrugated board 9 and are respectively fixedly connected through fasteners, and two side surfaces of the third L-shaped flange 911 of the second corrugated board 9 are respectively clung to two adjacent side surfaces of the upright post 94 of the third second corrugated board 9 and are respectively fixedly connected through fasteners.

As shown in fig. 12 and 13, the second side plate assembly 4 includes a side door assembly 41 and two first corrugated boards 8 respectively spliced and fixed on the front and rear sides of the side door assembly 41, the side door assembly 41 includes a side door frame 411 and a side door plate 412 hinged in the side door frame 411, frame structures are provided on the inner sides of two vertical sides of the side door frame 411, two sides of a second L-shaped flange 812 on each first corrugated board 8 are fixed with frame structures on the side door frame 411 on the corresponding side by fasteners, so that the first corrugated boards 8 are fixedly arranged on the sides of the side door frame 411. Through the frame structure on the side door frame 411 and the installation of the second L-shaped flanging 812 on the first corrugated board 8 in a positioning and matching way, the disassembly and the assembly can be completed by bare hands, the disassembly and the assembly are convenient and quick, and the fastener used for connecting the side door frame 411 and the first corrugated board 8 is positioned on the inner side of a container, so that the whole is attractive.

As shown in fig. 13, the side door frame 411 includes a first connector 4111, a second connector 4112, a third connector 4113 and a fourth connector 4114, where the first connector 4111 and the third connector 4113 are disposed vertically, the second connector 4112 and the fourth connector 4114 are disposed horizontally, the upper end of the first connector 4111 and the upper end of the third connector 4113 are fixedly connected by the second connector 4112, the lower end of the first connector 4111 and the lower end of the third connector 4113 are fixedly connected by the fourth connector 4114, the first connector 4111, the second connector 4112 and the third connector 4113 are U-shaped metal members, and the U-shaped grooves of the first connector 4111, the second connector 4112 and the third connector 4113 are disposed inward. By providing the first, second and third connecting members 4111, 4112, 4113 of the side door frame 411 as an integrally punched U-shaped metal member, the weight of the side door frame 41 is reduced and the production cost is also reduced.

The side door frame 411 further comprises two first U-shaped columns 413 formed by integral stamping, the two first U-shaped columns 413 are respectively fixed with the inner side of the first connecting piece 4111 and the inner side of the third connecting piece 4113, so that a frame structure is respectively formed on the inner sides of two vertical edges of the side door frame 411, the upper ends of the first U-shaped columns 413 protrude out of the upper ends of the side door frame 411, gaps exist between the lower ends of the first U-shaped columns 413 and the lower parts of the side door frame 411, the first U-shaped columns 413 are U-shaped metal pieces, and U-shaped grooves of the first U-shaped columns 413 are all arranged outwards. By providing a gap between the lower end of the first U-shaped column 413 and the lower portion of the side door frame 411, the first U-shaped column 413 can be inserted into the positioning hole of the floor assembly 1, and the lower portion of the side door frame 411 can be located outside the floor assembly 1 to cover the floor assembly 1.

Still further, as shown in fig. 14, the fourth connecting member 4114 includes a nineteenth connecting surface 4141, a twentieth connecting surface 41142, a twentieth connecting surface 41143, and a twenty-second connecting surface 41144, wherein the nineteenth connecting surface 4141 and the twenty-first connecting surface 41143 are vertically disposed, the nineteenth connecting surface 4141 is located outside the twenty-first connecting surface 41143, the twentieth connecting surface 41142 and the twenty-second connecting surface 41144 are horizontally disposed, and an upper end of the nineteenth connecting surface 4141 and a lower end of the twentieth connecting surface 41143 are connected by the twentieth connecting surface 41142, and an upper end of the twenty-first connecting surface 41143 is connected to an outside of the twenty-second connecting surface 41144. The side door assembly 411 is placed on the bottom frame of the floor assembly 1 through the twentieth connecting surface 41142 of the fourth connecting member 4114, and covers the floor assembly 1 through the nineteenth connecting surface 4141.

The nineteenth connecting surface 4141 on the side door frame 411 is in the same plane as the fifteenth connecting surface 833 on the first corrugated sheet 8.

In the present invention, side door panel 412 is a lightweight composite panel.

In the present invention, two sides of a first L-shaped flange 811 of one first corrugated board 8 are respectively attached to two adjacent sides of a first U-shaped column 413 on one side of a side door frame 411 and are respectively fixedly connected by fasteners, and two sides of a second L-shaped flange 812 of the other first corrugated board 8 are respectively attached to two adjacent sides of the first U-shaped column 413 on the other side of the side door frame 411 and are respectively fixedly connected by fasteners.

As shown in fig. 10, the front panel assembly 6 is formed by splicing a first corrugated panel 8 and a second corrugated panel 9. Two side surfaces of the second L-shaped flanging 812 of the first corrugated plate 8 are respectively clung to two adjacent side surfaces of the upright post 94 of the second corrugated plate 9 and are respectively fixedly connected through fasteners.

As shown in fig. 15, the rear door assembly 5 includes a rear door frame 51 and a rear door panel 52 hinged in the rear door frame 51, the rear door frame 51 includes a seventh connecting member 511, an eighth connecting member 512, a ninth connecting member 513, a tenth connecting member 514 and two second U-shaped columns 515, the seventh connecting member 511 and the ninth connecting member 513 are vertically arranged, the eighth connecting member 512 and the tenth connecting member 514 are horizontally arranged, the upper end of the seventh connecting member 511 and the upper end of the ninth connecting member 513 are fixedly connected through the eighth connecting member 512, and the lower end of the seventh connecting member 511 and the lower end of the ninth connecting member 513 are fixedly connected through the tenth connecting member 514; the second U-shaped columns 515 are U-shaped metal pieces, the U-shaped grooves of the second U-shaped columns 515 are all disposed backward, and the rear sides of the two second U-shaped columns 515 are fixedly connected with the front side of the seventh connecting piece 511 and the front side of the ninth connecting piece 513, respectively. The second U-shaped column 515 is fixedly connected with the side plate assemblies on the left and right sides of the cargo box, the second U-shaped column 515 is light in weight, and has an L-shaped connecting edge, so that the side plate assemblies are convenient to position, the end parts of the side plate assemblies on the two sides of the cargo box 100 can be positioned inside the cargo box, and the cargo box is attractive from the outside. The rear door panel 52 is a lightweight composite panel.

The seventh connecting piece 511 and the ninth connecting piece 513 are Fang Guanjian, the tenth connecting piece 514 is a U-shaped metal piece, the U-shaped groove of the tenth connecting piece 514 is disposed forward, a plurality of thirteenth connecting pieces 518 are disposed in the U-shaped groove of the tenth connecting piece 514, the rear side of the thirteenth connecting piece 518 is fixedly connected with the tenth connecting piece 514, and the front side of the thirteenth connecting piece 518 is fixedly connected with the floor assembly of the cargo compartment. The thirteenth connecting member 518 is provided to fix the tenth connecting member 514 and the floor assembly 1, and can be fixedly coupled to the floor assembly 1 while reducing the weight of the rear door frame 51.

The eighth connecting member 512 includes a twenty-third connecting surface 5121, a twenty-fourth connecting surface 5122, a twenty-fifth connecting surface 5123, a twenty-sixth connecting surface 5124, and a twenty-seventh connecting surface 5125, the twenty-fourth connecting surface 5122 and the twenty-sixth connecting surface 5124 are vertically disposed, the twenty-fourth connecting surface 5122 is located at a rear side of the twenty-sixth connecting surface 5124, the twenty-third connecting surface 5121, the twenty-fifth connecting surface 5123, and the twenty-seventh connecting surface 5125 are horizontally disposed, a front side of the twenty-third connecting surface 5121 is connected with an upper end of the twenty-fourth connecting surface 5122, a lower end of the twenty-fourth connecting surface 5122 is connected with a lower end of the twenty-sixth connecting surface 5124 through the twenty-fifth connecting surface 5123, and an upper end of the twenty-sixth connecting surface 5124 is connected with a rear side of the twenty-seventh connecting surface 5125.

Further, the height of the twenty-fourth connection surface 5122 is greater than the height of the twenty-sixth connection surface 5124. The twenty-fourth connection face 5122 can thus completely shield the top plate in the top cap assembly 2.

The twenty-seventh connection surface 5125 is fixedly connected to the lower surface of the rear end of the top plate 21 in the top cover assembly 2 on the cargo compartment 100, the height difference between the twenty-fourth connection surface 5122 and the twenty-sixth connection surface 5124 is greater than the thickness of the top plate 21, and the twenty-third connection surface 5121 is fixedly connected to the tail plate 224 in the top cover assembly 2 on the cargo compartment 100. In this way, the rear end of the top plate 21 of the top cover assembly 2 is placed on the twenty-sixth connection surface 5124, the twenty-fourth connection surface 5122 shields the rear end of the top plate, and water entering from the rear of the top plate 21 can enter the grooves formed by the twenty-fourth connection surface 5122, the twenty-fifth connection surface 5123 and the twenty-sixth connection surface 5124, so that water is prevented from entering the container, and the fastener for fixing the twenty-seventh connection surface 5125 and the top plate assembly 2 is located in the container 100, so that the overall appearance is attractive.

In order to increase the strength of the eighth connecting member 512, a plurality of fourth U-shaped members 517 are fixedly disposed between the twenty-fourth connecting surface 5122 and the twenty-sixth connecting surface 5124, one side of the fourth U-shaped member 517 is fixedly connected to the twenty-fourth connecting surface 5122, and the other side of the fourth U-shaped member 517 is fixedly connected to the twenty-sixth connecting surface 5124 to prevent the eighth connecting member 512 from being deformed.

As shown in fig. 16 and 17, the positioning post 7 includes a fourth bending member 71 and a fifth bending member 72, where the fourth bending member 71 is an L-shaped metal member, and the fifth bending member 72 includes a twenty-eighth connecting surface 721, a twenty-ninth connecting surface 722, a thirty-eighth connecting surface 723 and a thirty-eighth connecting surface 724 that are sequentially connected in a stepped shape, and a free end of the twenty-eighth connecting surface 721 is vertically fixed to one side surface of the fifth bending member 72, and a free end of the thirty-connecting surface 724 is vertically fixed to the other side surface of the fifth bending member 72, so that the fifth bending member 72 and the fourth bending member 71 form a positioning hole g73.

The invention also discloses an assembly method of the carriage 100, which comprises the following specific steps:

1) Installing a positioning column 7: the lower ends of the two positioning columns 7 are respectively and vertically fixedly arranged at the left side and the right side of the front end of the underframe 11 of the underframe assembly 1 through fasteners;

2) Assembling a front plate assembly 6: a first corrugated board 8 and a second corrugated board 9 are adopted to assemble and fix the front board assembly 6 on the underframe assembly 1;

3) Assembling a first side plate assembly 3: a first corrugated board 8 and three second corrugated boards 9 are assembled on the underframe assembly 1 to form a first side board assembly 3;

4) Assembling the second side plate assembly 4: the second side plate assembly 4 is formed by assembling two first corrugated plates 8 and a side door assembly 41, wherein the two first corrugated plates 8 are respectively arranged at the left side and the right side of the side plate assembly 41;

5) Mounting a rear door assembly 5: the rear door assembly 5 is arranged at the rear end of the underframe assembly 1;

6) Installing a top cover assembly 2: two corner posts 2235 of the top cover assembly 2 are respectively inserted into positioning holes of the corresponding positioning posts 7, and the top cover assembly 2 is fixedly connected with the front plate assembly 6, the first side plate assembly 3, the second side plate assembly 4 and the rear door assembly 5 through fasteners.

Specifically, in step 2), the upright post 94 of one second corrugated board 9 is inserted into the positioning hole at the front end of the chassis 11, at this time, the thirty-th connection surface 723 and the thirty-th connection surface 724 of one positioning post 7 are clung to the two side surfaces of the L-shaped flanging of the second corrugated board 9 and are respectively fixed by fasteners, and the lower end of the second corrugated board 9 and the upright post 94 are respectively fixed with the chassis 11 by fasteners; the two side surfaces of the L-shaped flanging on one side of the first corrugated plate 8 are tightly attached to two adjacent side surfaces of the upright post 94 of the second corrugated plate 9 and are respectively fixed by fasteners, at this time, the two side surfaces of the L-shaped flanging on the other side of the first corrugated plate 8 are tightly attached to the thirty-th connecting surface 723 and the thirty-th connecting surface 724 of the other positioning post 7 and are respectively fixed by fasteners, and the lower end of the first corrugated plate 8 is fixed with the bottom frame 11 by fasteners, so that the front plate assembly 6 is formed.

In step 3), the lower end of one first corrugated board 8 is fixed with the chassis 11 through a fastener, the upright post 94 of the first second corrugated board 9 is inserted into the positioning hole on one side of the corresponding chassis 11, two adjacent side surfaces on the upright post 94 of the first second corrugated board 9 are respectively attached to two side surfaces of the L-shaped flanging on one side of the first corrugated board 8 and are respectively fixed through the fastener, the lower end of the first second corrugated board 9 and the upright post 94 are respectively fixed with the chassis 11 through the fastener, the upright post 94 of the second corrugated board 9 is inserted into the positioning hole on one side of the chassis 11 of the corresponding chassis assembly 1, two adjacent side surfaces on the upright post 94 of the second corrugated board 9 are respectively attached to two side surfaces of the L-shaped flanging on the other side of the first second corrugated board 9 and are respectively fixed through the fastener, the lower end of the second corrugated board 9 and the upright post 94 of the third corrugated board 9 are respectively attached to the positioning hole on one side of the chassis 11 of the corresponding chassis assembly 1 through the fastener, and the two adjacent side surfaces on the two side surfaces of the second corrugated board 9 are respectively attached to the two side surfaces of the second corrugated board 9 through the fastener. When the first side plate assembly 3 is installed, two side surfaces of the L-shaped flanging at one side of the first corrugated plate 8 are respectively clung to the twenty-eighth connecting surface 721 and the twenty-ninth connecting surface 722 of one positioning column 7 and are respectively fixed by fasteners; alternatively, the two side surfaces of the L-shaped flange of the second corrugated sheet 9 located at the outermost side are respectively abutted against the twenty-eighth connection surface 721 and the twenty-ninth connection surface 722 of one positioning column 7 and respectively fixed by fasteners.

In step 4), two side surfaces of the L-shaped flange on one side of the first corrugated sheet 8 are tightly attached to the twenty-eighth connecting surface 721 and the twenty-ninth connecting surface 722 of the other positioning column 7 and are respectively fixed by fasteners, the lower end of the first corrugated sheet 8 is fixed to the chassis 11 by fasteners, two adjacent side surfaces of the U-shaped column on one side of the side door assembly 41 are tightly attached to two side surfaces of the L-shaped flange on the other side of the first corrugated sheet 8 and are respectively fixed by fasteners, the lower end of the side door assembly 41 is fixed to the chassis 11 by fasteners, two side surfaces of the L-shaped flange on one side of the other first corrugated sheet 8 are tightly attached to two adjacent side surfaces of the U-shaped column on the other side of the side door assembly 41 and are respectively fixed by fasteners, and the lower end of the first corrugated sheet 8 is fixed to the chassis 11 by fasteners, thereby forming the second side panel assembly 4.

In step 5), two U-shaped columns of the rear door frame 51 on the rear door assembly 5 are respectively attached to the L-shaped flanges at the rear end of the first side plate assembly 3 and the L-shaped flanges at the rear end of the second side plate assembly 4 and are respectively fixed by fasteners, and the lower end of the rear door frame 51 is fixed by fasteners to the bottom frame 11.

In step 6), the two corner posts 2235 of the top cover assembly 2 are respectively inserted into the positioning holes of the corresponding positioning posts 7, the upper ends of the upright posts on the front plate assembly 6, the upper ends of the upright posts on the first side plate assembly 3, the upper ends of the U-shaped posts on the second side plate assembly 4 and the upper ends of the U-shaped posts on the back door assembly 5 are respectively inserted into the positioning holes of the top cover assembly 2, and the top cover assembly 2 is fixedly connected with the front plate assembly 6, the first side plate assembly 3, the second side plate assembly 4 and the back door assembly 5 through fasteners.

All features described in the description, the appended claims and the drawings, either alone or in any combination, are important features of the present invention.

In the description of the present specification, the descriptions of the terms "one embodiment," "some embodiments," "one implementation," "a particular implementation," "other implementations," "examples," "particular examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment, implementation, or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described above may be combined in any suitable manner in any one or more embodiments, implementations, or examples. The technical scheme disclosed by the invention also comprises the technical scheme that any one or more specific features, structures, materials or characteristics are formed singly or in combination.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, variations, deletions of parts, additions of features, or re-combination of features may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the invention, all such simple modifications, equivalents, and adaptations of the embodiments as may be made by the principles of the invention and without departing from the scope of the invention.

Claims (10)

1. The utility model provides a chassis assembly of goods railway carriage or compartment, includes chassis (11) and bottom plate (12), and bottom plate (12) are fixed to be laid on chassis (11), a serial communication port, chassis (11) are including first side rail (111), second side rail (112), preceding side rail (113), a plurality of crossbeams (115), a plurality of longerons (116) and a plurality of angle sign indicating number (117), first side rail (111), second side rail (112), preceding side rail (113), crossbeam (115) and longeron (116) are U type metalwork, preceding side rail (113) transversely set up, transversely are connected with preceding side rail (113) between the front end of first side rail (111) and the front end of second side rail (112), and a plurality of crossbeams (115) are transversely fixed between first side rail (111) and second side rail (112), and a plurality of longerons (116) are vertically fixed between first side rail (111) and second side rail (112), and longeron (116) are through the fastener of angle sign indicating number (117) fixed connection in the lower part of angle sign indicating number (115) and another side rail (117) through angle sign indicating number (117) fixed connection.

2. The undercarriage assembly of a cargo compartment of claim 1 wherein the U-shaped grooves of the first side rail (111), the second side rail (112) and the front side rail (113) are all disposed inwardly, and the top surface of the first side rail (111), the top surface of the second side rail (112), the top surface of the front side rail (113) and the top surfaces of the plurality of cross rails (115) are on the same plane.

3. The underframe assembly of the cargo compartment according to claim 1, wherein a notch (1123) is formed in the middle of the second side beam (112), a third U-shaped piece (1124) is respectively arranged at the front end and the rear end of the notch (1123), and the third U-shaped piece (1124) is fixedly connected with the second side beam (112) and forms a positioning hole b (1121) with the second side beam (112).

4. A chassis assembly for a cargo compartment according to claim 3, characterized in that a baffle (1125) for shielding the recess (1123) is provided between the two third U-shaped members (1124).

5. The undercarriage assembly of a cargo compartment of claim 4 wherein said baffle (1125) has a height that is lower than a height of a top surface of the second side rail (112).

6. The undercarriage assembly of a cargo compartment of claim 1 wherein the stringers (116) are internally provided with U-shaped stiffeners, and the corner brace (117), stringers (116) and U-shaped stiffeners are fixedly connected by fasteners.

7. The undercarriage assembly of a cargo compartment of claim 1 wherein the cross member (115) is provided with a U-shaped reinforcement, and the corner brace (117), cross member (115) and U-shaped reinforcement are fixedly connected by fasteners.

8. A cargo compartment, characterized by comprising a chassis assembly (1) according to any of claims 1-7.

9. A method for assembling a cargo compartment according to claim 8, wherein the top surface of the first side beam (111) of the underframe assembly (1) is provided with a plurality of positioning holes a (1111), the top surface of the second side beam (112) is provided with a plurality of positioning holes b (1121), and the top surface of the front side beam (113) is provided with a plurality of positioning holes c (1131); the front plate assembly of the cargo box is provided with an upright post corresponding to the positioning hole c (1131) on the front side beam (113), the lower end of the upright post of the front plate assembly of the cargo box is inserted into the positioning hole c (1131) on the front side beam (113) and fixedly connected with the front side beam (113) of the underframe assembly (1) through a fastener; the first side plate assembly of the cargo box is provided with an upright post corresponding to the positioning hole a (1111) on the first side beam (111), the lower end of the upright post of the first side plate assembly of the cargo box is inserted into the positioning hole a (1111) of the first side beam (111) and the first side plate assembly is fixedly connected with the first side beam (111) of the underframe assembly (1) through a fastener; the second side plate assembly of the cargo box is provided with a U-shaped metal piece corresponding to the locating hole b (1121) on the second side beam (112), the lower end of the U-shaped metal piece of the second side plate assembly of the cargo box is inserted into the locating hole b (1121) on the second side beam (112) and fixedly connected with the second side beam (112) of the underframe assembly (1) through a fastener; the rear door assembly of the cargo box is fixedly arranged at the rear end of the underframe assembly (1) through a fastener.

10. A vehicle comprising a cargo compartment according to claim 8.