A vehicle and a method of assembling a vehicle body, chassis and body

Abstract

The application discloses a vehicle and a carriage, a chassis and an assembling method thereof, which comprises a plurality of cross beams, a plurality of longitudinal beams, a rear bottom beam, an eleventh connecting edge, a plurality of third connecting pieces, a first side bottom beam, a second side bottom beam, a front bottom beam and a bottom plate, and the specific assembling steps are as follows: 1) arranging the plurality of longitudinal beams in the front-rear direction, cross-fixing the plurality of cross beams 11 and the longitudinal beams 12, fixing and mounting the rear bottom beam at the rear end of the longitudinal beam and arranging the rear bottom beam in parallel with the cross beam, and fixing and mounting the third connecting piece at the front part of the corresponding longitudinal beam; 2) fixing the front bottom beam and the third connecting piece, fixing one end of the first side bottom beam and the cross beam, fixing the other end of the cross beam, and making the upper surfaces of the eleventh connecting edge, the first side bottom beam, the second side bottom beam and the front bottom beam flush and form a platform; and 3) placing the bottom plate on the platform formed in the step 2. In the scheme, the bottom plate can be directly placed on the platform, the bottom plate does not need to be limited and mounted, the structure is simple, and the installation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of logistics, and in particular to a vehicle, a vehicle compartment, a chassis and an assembling method. BACKGROUND

[0002] The vehicle compartment is an indispensable part in modern logistics. Through the huge carrying capacity of the vehicle compartment, a variety of items to be transported can be loaded at one time, thereby improving the efficiency of each transportation. The vehicle compartment is usually composed of a top plate, a side plate, a front plate and a rear door, and the whole vehicle compartment is installed on the chassis of the vehicle.

[0003] The patent application with the publication number CN216761926U discloses a new energy logistics vehicle and a vehicle compartment. The vehicle compartment includes a compartment plate assembly, a rear door assembly and a chassis assembly. The compartment plate assembly and the rear door assembly are installed on the chassis assembly and jointly form a vehicle compartment part. The compartment plate assembly includes a side plate assembly and a top plate. The top plate is welded and fixed with the side plate assembly. The chassis assembly includes a bottom plate, a longitudinal beam and a first cross beam. The bottom plate is welded and fixed with the side plate assembly. The first cross beam and the longitudinal beam are fixedly connected through a first connecting piece. The first connecting piece is provided with a positioning hole. The lower surface of the bottom plate is provided with a positioning column matched with the positioning hole. The bottom plate is positioned and installed on the first cross beam through the cooperation of the positioning hole and the positioning column. In this scheme, the following problems exist: the bottom plate needs to be positioned and installed with the cross beam, and the number of accessories is large, and the assembly is relatively complicated. SUMMARY

[0004] In order to solve the above technical problems, the purpose of the present application is to provide a vehicle, a vehicle compartment, a chassis and an assembling method. The bottom plate does not need to be positioned and installed with the cross beam in the chassis, and the assembly is simple and fast.

[0005] In order to achieve the above purpose, the following technical solutions are adopted in the present application:

[0006] An assembling method of a chassis, comprising:

[0007] A plurality of cross beams;

[0008] A plurality of longitudinal beams;

[0009] A rear bottom beam, which is provided with a horizontal eleventh connecting edge;

[0010] A plurality of third connecting pieces;

[0011] A first side bottom beam, which is provided with a U-shaped groove;

[0012] A second side bottom beam, which is provided with a U-shaped groove;

[0013] A front bottom beam, which is provided with a U-shaped groove;

[0014] A bottom plate;

[0015] The specific assembly steps are as follows:

[0016] 1) A plurality of longitudinal beams are arranged in the front-rear direction, a plurality of cross beams are fixedly arranged with the longitudinal beams, a rear bottom beam is fixedly arranged at the rear end of the longitudinal beam and arranged in parallel with the cross beam, and a third connecting piece is fixedly arranged at the front part of the corresponding longitudinal beam in one-to-one correspondence with the longitudinal beam.

[0017] 2) The U-shaped groove of the front bottom beam is clamped on the third connecting piece and fixed with the third connecting piece, the U-shaped groove of the first side bottom beam is clamped on one end of the cross beam and fixed with the cross beam, the U-shaped groove of the second side bottom beam is clamped on the other end of the cross beam and fixed with the cross beam, the eleventh connecting edge of the rear bottom beam, the upper surface of the U-shaped groove of the first side bottom beam, the upper surface of the U-shaped groove of the second side bottom beam, and the upper surface of the U-shaped groove of the front bottom beam are flush and form a platform.

[0018] 3) The bottom plate is placed on the platform formed in step 2.

[0019] As a preferred, the front bottom beam and the first side bottom beam are fixedly connected through the fifteenth connecting piece, the front bottom beam and the second side bottom beam are fixedly connected through the sixteenth connecting piece, the rear bottom beam and the first side bottom beam are fixedly connected through the seventeenth connecting piece, and the rear bottom beam and the second side bottom beam are fixedly connected through the eighteenth connecting piece.

[0020] As a preferred, the bottom surface of the cross beam is provided with a first sliding groove opening downward along the length direction of the cross beam, a plurality of limiting pieces are arranged in the first sliding groove, the head end of the limiting piece is clamped in the first sliding groove of the cross beam, the tail end of the limiting piece extends out of the first sliding groove and is connected with the longitudinal beam and fixed through a fastener; wherein the limiting piece is a T-shaped bolt, and the fastener is a nut.

[0021] As a preferred, the eleventh connecting edge of the rear bottom beam is provided with anti-skid lines.

[0022] As a preferred, the longitudinal beam is arranged in a U shape, the U-shaped groove on the longitudinal beam is arranged inward, the third connecting piece is arranged in a U shape, the U-shaped groove of the third connecting piece is arranged inward, and the U-shaped groove of the front bottom beam is clamped on the third connecting piece and fixed with the third connecting piece through a third corner code.

[0023] As a preferred, the front part of the longitudinal beam is provided with a second connecting piece, the second connecting piece is arranged in parallel with the cross beam, the two ends of the second connecting piece are clamped and fixed in the U-shaped groove of the first side bottom beam and the U-shaped groove of the second side bottom beam respectively, and the rear end of the third connecting piece is fixedly connected with the second connecting piece through a second corner code.

[0024] Preferably, the lower part of the longitudinal beam is provided with a plurality of first connecting members, the first connecting member comprises a seventh connecting edge and an eighth connecting edge, the seventh connecting edge is vertically arranged, the eighth connecting edge is horizontally arranged, the lower end of the seventh connecting edge is connected with the eighth connecting edge, the seventh connecting edge is fixedly connected with the longitudinal beam, and the eighth connecting edge is located below the longitudinal beam and in contact with the lower surface of the longitudinal beam.

[0025] A chassis is assembled by using the chassis assembling method.

[0026] A carriage comprises a chassis as described above.

[0027] A vehicle comprises a carriage as described above.

[0028] The present application has the following beneficial effects due to the adoption of the above technical solutions:

[0029] 1. In the present scheme, the rear bottom beam is fixedly installed at the rear end of the longitudinal beam, the first side bottom beam is clamped at one end of the cross beam, the second side bottom beam is clamped at the other end of the cross beam, and the front bottom beam is clamped at the front end of the third connecting member, and the eleventh connecting edge of the rear bottom beam, the upper surface of the U-shaped groove of the first side bottom beam, the upper surface of the U-shaped groove of the second side bottom beam, and the upper surface of the U-shaped groove of the front bottom beam together form a platform, so that the bottom plate can be directly placed on the platform without the need for limiting installation of the bottom plate, and the structure is simple and convenient to install.

[0030] 2. In the present scheme, the first sliding groove is formed in the bottom surface of the cross beam, the head end of the limiting piece is limitedly arranged in the first sliding groove of the cross beam, the tail end of the limiting piece is connected with the longitudinal beam through the fastener, the fastener is loosened, the limiting piece can be freely moved along the first sliding groove of the cross beam to quickly change the distance between the longitudinal beams, and the fastener is tightened to fix the longitudinal beam and the cross beam. Without punching holes in the cross beam, the distance between the longitudinal beams can be quickly changed, the customer can quickly adapt to different truck chassis under the condition of having inventory carriage spare parts, the punching precision requirement of the longitudinal beam is low, the structure is simple, the number of parts is small, the probability of part loss is low, and there is basically no extra connecting parts exposed, and the overall appearance is beautiful. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of the chassis in the present application;

[0032] Figure 2 is Figure 1 is a structural schematic view after removing the first side bottom beam, the second side bottom beam and the front bottom beam;

[0033] Figure 3 is a mounting structure schematic view of the cross beam and the longitudinal beam;

[0034] Figure 4 is a structural schematic view of the cross beam;

[0035] Figure 5 Fig. 1 is a structural schematic view of a first connecting piece;

[0036] Figure 6 Fig. 2 is a structural schematic view of a rear bottom beam;

[0037] Figure 7 Fig. 3 is a structural schematic view of a carriage.

[0038] Reference signs:

[0039] 1, underframe; 2, bottom plate; 3, top plate assembly; 4, first side plate assembly; 5, second side plate assembly; 6, front plate assembly;

[0040] 11, cross beam; 101, first sliding groove; 111, first connecting edge; 112, second connecting edge; 113, third connecting edge;

[0041] 12, longitudinal beam;

[0042] 13, limiting piece;

[0043] 14, fastener;

[0044] 15, first connecting piece; 151, seventh connecting edge; 152, eighth connecting edge;

[0045] 16, second connecting piece;

[0046] 17, third connecting piece;

[0047] 18, first corner code;

[0048] 19, second corner code;

[0049] 120, third corner code;

[0050] 130, rear bottom beam; 1301, ninth connecting edge; 1302, tenth connecting edge; 1303, eleventh connecting edge; 1304, twelfth connecting edge; 1305, thirteenth connecting edge; 1306, fourteenth connecting edge; 1307, fifteenth connecting edge; 1308, first socket; 1309, second socket;

[0051] 42, first side bottom beam;

[0052] 52, second side bottom beam;

[0053] 62, front bottom beam. DETAILED DESCRIPTION

[0054] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0055] In the description of this 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," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless explicitly defined otherwise.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] For the sake of clarity, in the present application, when the carriage is installed on the vehicle, the end where the vehicle head is located is the front, and vice versa. The space close to the carriage enclosure is the inside, and vice versa.

[0060] As shown in Figures 1 to 7 The present application discloses a method for assembling a chassis, comprising:

[0061] a plurality of cross beams 11;

[0062] a plurality of longitudinal beams 12;

[0063] a rear bottom beam 130, which is provided with a horizontal eleventh connecting edge 1303;

[0064] a plurality of third connecting pieces 17;

[0065] a first side bottom beam 42, which is provided with a U-shaped groove;

[0066] a second side bottom beam 52, which is provided with a U-shaped groove;

[0067] a front bottom beam 62, which is provided with a U-shaped groove;

[0068] a bottom plate 2;

[0069] The specific assembly steps are as follows:

[0070] 1) A plurality of longitudinal beams 12 are arranged in the front-rear direction, a plurality of cross beams 11 are fixedly arranged with the longitudinal beams 12, a rear bottom beam 130 is fixedly installed at the rear end of the longitudinal beam 12 and arranged in parallel with the cross beam 11, and a third connecting piece 17 is fixedly installed on the front part of the corresponding longitudinal beam 12 in one-to-one correspondence with the longitudinal beam 12;

[0071] 2) The U-shaped groove of the front bottom beam 62 is clamped on the third connecting piece 17 and fixed with the third connecting piece 17, the U-shaped groove of the first side bottom beam 42 is clamped on one end of the cross beam 11 and fixed with the cross beam 11, the U-shaped groove of the second side bottom beam 52 is clamped on the other end of the cross beam 11 and fixed with the cross beam 11, the eleventh connecting edge 1303 of the rear bottom beam 130, the upper surface of the U-shaped groove of the first side bottom beam 42, the upper surface of the U-shaped groove of the second side bottom beam 52, and the upper surface of the U-shaped groove of the front bottom beam 62 are flush and form a platform;

[0072] 3) The bottom plate 2 is placed on the platform formed in step 2).

[0073] In the scheme, the rear bottom beam 130 is fixedly installed at the rear end of the longitudinal beam 12, the first side bottom beam 42 is clamped at one end of the cross beam 11, the second side bottom beam 52 is clamped at the other end of the cross beam 11, the front bottom beam 62 is clamped at the front end of the third connecting piece 17, and the eleventh connecting edge 1303 of the rear bottom beam 130, the upper surface of the U-shaped groove of the first side bottom beam 42, the upper surface of the U-shaped groove of the second side bottom beam 52, and the upper surface of the U-shaped groove of the front bottom beam 62 jointly form a platform, so that the bottom plate 2 can be directly placed on the platform, without the need for limiting installation of the bottom plate 2, and the structure is simple and convenient to install.

[0074] In order to increase the connection strength between the front bottom beam 62, the first side bottom beam 42, the second side bottom beam 52 and the rear bottom beam 130, and ensure the stability of the frame, the front bottom beam 62 and the first side bottom beam 42 are fixedly connected through a fifteenth connecting piece, the front bottom beam 62 and the second side bottom beam 52 are fixedly connected through a sixteenth connecting piece, the rear bottom beam 130 and the first side bottom beam 42 are fixedly connected through a seventeenth connecting piece, and the rear bottom beam 130 and the second side bottom beam 52 are fixedly connected through an eighteenth connecting piece. The fifteenth connecting piece, the sixteenth connecting piece, the seventeenth connecting piece and the eighteenth connecting piece are angle code pieces.

[0075] In order to increase the stability of the bottom plate 2 and prevent the bottom plate 2 from shaking when placed on the platform, as shown in Figure 6 the eleventh connecting edge 1303 of the rear bottom beam 130 is provided with anti-skid lines. Of course, glue or screws can also be applied between the bottom plate 2 and the platform to further increase the stability of the bottom plate 2.

[0076] In the scheme, as shown in Figures 2 to 4 the bottom surface of the cross beam 11 is provided with a first downward-opening sliding groove 101 along the length direction of the cross beam 11, a plurality of limiting pieces 13 are arranged in the first sliding groove 101, the head end of the limiting piece 13 is clamped in the first sliding groove 101 of the cross beam 11, the tail end of the limiting piece 13 extends out of the first sliding groove 101 and is connected with the longitudinal beam 12 and fixed through a fastener 14.

[0077] In this way, by opening the first sliding groove 101 on the bottom surface of the cross beam 11, the head end of the limiting piece 13 is positioned and arranged in the first sliding groove 101 of the cross beam 11, and the tail end of the limiting piece 13 is connected with the longitudinal beam 12 through the fastener 14. By loosening the fastener 14, the limiting piece 13 can be freely moved along the first sliding groove 101 of the cross beam 11 to quickly change the distance between the longitudinal beams 12. By tightening the fastener, the longitudinal beam 12 and the cross beam 11 can be fixed. When the customer needs to quickly adapt to different truck chassis in the case of having spare parts in the truck compartment, the fastener 14 is loosened, and the longitudinal beam 12 is moved to adjust the distance between the longitudinal beams 12. In the scheme, only the limiting piece 13 and the fastener 14 are used to quickly adjust the distance between the longitudinal beams 12, the structure is simple, the number of parts is small, and the accuracy requirement of the hole position for installing the limiting piece 13 on the longitudinal beam 12 is low.

[0078] In the application, the number of cross beams 11 and longitudinal beams 12 can be increased or decreased according to actual conditions.

[0079] Specifically, as shown in Figure 4 The cross beam 11 includes a first connecting edge 111, a second connecting edge 112 and a third connecting edge 113 which are integrally formed. The first connecting edge 111 and the third connecting edge 113 are horizontally arranged, and the second connecting edge 112 is vertically arranged. The upper end of the second connecting edge 112 is connected with the first connecting edge 111, and the lower end of the second connecting edge 112 is connected with the third connecting edge 113. The first sliding groove 101 is arranged on the third connecting edge 113. The longitudinal beam 12 is arranged in a U shape, and the U-shaped groove on the longitudinal beam 12 is arranged inward. The third connecting piece 17 is arranged in a U shape, and the U-shaped groove of the third connecting piece 17 is arranged inward. In this way, from the side, neither the limiting piece 13 nor the fastener 14 is exposed, and the overall appearance of the chassis is beautiful.

[0080] In the application, the chassis is made of aluminum material, and the overall weight of the chassis is light, and the shape is beautiful. The bottom plate 2 is a thermosetting composite plate.

[0081] In the application, the limiting piece 13 is a T-shaped bolt, specifically a half-round head square neck bolt, which can effectively prevent the bolt from rotating and increase the connection stability. The fastener 14 is a nut, specifically a flange nylon lock nut, which allows multiple disassembly and installation and can ensure that the bolt connection remains stable under vibration or impact.

[0082] As shown in Figure 2As shown, the U-shaped groove of the front bottom beam 62 is clamped on the third connecting piece 17 and fixed with the third connecting piece 17 through the third corner code 120. The front part of the longitudinal beam 12 is provided with the second connecting piece 16, which is arranged in parallel with the cross beam 11. The two ends of the second connecting piece 16 are clamped and fixed in the U-shaped grooves of the first side bottom beam 42 and the second side bottom beam 52 respectively. The rear end of the third connecting piece 17 is fixedly connected with the second connecting piece 16 through the second corner code 19.

[0083] As shown in the drawings, Figure 6 As shown, the rear bottom beam 130 comprises an integrally formed ninth connecting edge 1301, a tenth connecting edge 1302, an eleventh connecting edge 1303, a twelfth connecting edge 1304, a thirteenth connecting edge 1305 and a fourteenth connecting edge 1306. The ninth connecting edge 1301, the eleventh connecting edge 1303, the thirteenth connecting edge 1305 and the fifteenth connecting edge 1307 are horizontally arranged, and the tenth connecting edge 1302, the twelfth connecting edge 1304 and the fourteenth connecting edge 1306 are vertically arranged. The front part of the ninth connecting edge 1301 is fixedly connected with the longitudinal beam 12. The lower end of the tenth connecting edge 1302 is connected with the middle part of the ninth connecting edge 1301. The upper end of the tenth connecting edge 1302 is connected with the front end of the eleventh connecting edge 1303. The rear end of the eleventh connecting edge 1303 is connected with the lower end of the twelfth connecting edge 1304. The upper end of the twelfth connecting edge 1304 is connected with the front end of the thirteenth connecting edge 1305. The rear end of the thirteenth connecting edge 1305 is connected with the upper end of the fourteenth connecting edge 1306. The lower end of the fourteenth connecting edge 1306 is connected with the rear end of the ninth connecting edge 1301. The ninth connecting edge 1301, the tenth connecting edge 1302, the eleventh connecting edge 1303, the twelfth connecting edge 1304, the thirteenth connecting edge 1305 and the fourteenth connecting edge 1306 successively enclose a through cavity on the rear bottom beam 130. In order to increase the strength of the rear bottom beam 130, the fifteenth connecting edge 1307 is further arranged in the through cavity of the rear bottom beam 130, which divides the through cavity into the first socket 1308 and the second socket 1309 arranged in upper and lower positions. The strength of the rear bottom beam 130 is improved while the weight of the rear bottom beam 130 is reduced.

[0084] In this scheme, as shown in the drawings, Figure 2 and Figure 5As shown, the lower part of the longitudinal beam 12 is provided with a plurality of first connecting pieces 15 for connecting with the vehicle chassis, the first connecting piece 15 comprises a seventh connecting edge 151 and an eighth connecting edge 152, the seventh connecting edge 151 is vertically arranged, the eighth connecting edge 152 is horizontally arranged, the lower end of the seventh connecting edge 151 is connected with the eighth connecting edge 152, the seventh connecting edge 151 is fixedly connected with the longitudinal beam 12, and the eighth connecting edge 152 is located below the longitudinal beam 12 and in contact with the lower surface of the longitudinal beam 12. The chassis is installed on the vehicle chassis through the first connecting piece 15, and a plurality of waist-shaped holes are formed in the eighth connecting edge 152, so that the installation precision requirement of the first connecting piece 15 can be reduced.

[0085] In the present scheme, the outer side of the front bottom beam 62, the outer side of the first side bottom beam 42 and the outer side of the second side bottom beam 52 are respectively provided with an upwardly-opened U-shaped groove, the U-shaped groove on the outer side of the front bottom beam 62 can be used to clamping the lower end of the front plate assembly, the U-shaped groove on the outer side of the first side bottom beam 42 can be used to clamping the lower end of the first side plate assembly, and the U-shaped groove on the outer side of the second side bottom beam 52 can be used to clamping the lower end of the second side plate assembly. In other ways, the front plate assembly pre-clamped with the front bottom beam 62 can be installed as a whole, the first side plate assembly pre-clamped with the first side bottom beam 42 can be installed as a whole, and the second side plate assembly pre-clamped with the second side bottom beam 52 can be installed as a whole.

[0086] The application further discloses a chassis, which is assembled by using the assembling method of the chassis.

[0087] The application further discloses a vehicle compartment as shown in the drawings. Figure 7 The application further discloses a vehicle compartment as shown in the drawings.

[0088] The application further discloses a vehicle, which comprises the vehicle compartment as described above.

[0089] All the features described in the specification, the attached claims and the drawings, whether alone or in any combination, are important features of the application.

[0090] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an implementation", "a specific implementation", "other implementations", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment, implementation or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described above can also be combined in any one or more embodiments, implementations or examples in a suitable manner. The technical solutions disclosed in the present application also include the technical solutions formed by any one or more of the specific features, structures, materials or characteristics described above in a separate or combined manner.

[0091] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements, variations, deletions of part of the features, additions of features or recombination of features to the above embodiments within the scope of the present application without departing from the principles and spirit of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the innovative principles of the present application still falls within the scope of the technical solutions of the present application.

Claims

1. A method of assembling a chassis, characterized by, Comprise: A plurality of cross beams (11); A plurality of longitudinal beams (12); A rear bottom beam (130) comprising a ninth connecting edge (1301), a tenth connecting edge (1302), an eleventh connecting edge (1303), a twelfth connecting edge (1304), a thirteenth connecting edge (1305) and a fourteenth connecting edge (1306) integrally formed, the ninth connecting edge (1301), the eleventh connecting edge (1303) and the thirteenth connecting edge (1305) are horizontally arranged, the tenth connecting edge (1302), the twelfth connecting edge (1304) and the fourteenth connecting edge (1306) are vertically arranged, the front part of the ninth connecting edge (1301) is fixedly connected with the longitudinal beam (12), the lower end of the tenth connecting edge (1302) is connected with the middle part of the ninth connecting edge (1301), the upper end of the tenth connecting edge (1302) is connected with the front end of the eleventh connecting edge (1303), the rear end of the eleventh connecting edge (1303) is connected with the lower end of the twelfth connecting edge (1304), the upper end of the twelfth connecting edge (1304) is connected with the front end of the thirteenth connecting edge (1305), the rear end of the thirteenth connecting edge (1305) is connected with the upper end of the fourteenth connecting edge (1306), the lower end of the fourteenth connecting edge (1306) is connected with the rear end of the ninth connecting edge (1301), the ninth connecting edge (1301), the tenth connecting edge (1302), the eleventh connecting edge (1303), the twelfth connecting edge (1304), the thirteenth connecting edge (1305) and the fourteenth connecting edge (1306) successively enclose a through cavity, and a fifteenth connecting edge (1307) is further arranged in the through cavity of the rear bottom beam (130), the fifteenth connecting edge (1307) divides the through cavity into a first socket (1308) and a second socket (1309) arranged in an upper-lower direction; A plurality of third connecting pieces (17); A first side bottom beam (42) provided with a U-shaped groove; A second side bottom beam (52) provided with a U-shaped groove; A front bottom beam (62) provided with a U-shaped groove; A bottom plate (2); The specific assembly steps are as follows: 1) A plurality of longitudinal beams (12) are arranged in the front-rear direction, a plurality of cross beams (11) are fixedly arranged with the longitudinal beams (12), a rear bottom beam (130) is fixedly installed at the rear end of the longitudinal beam (12) and arranged in parallel with the cross beam (11), and a third connecting piece (17) is fixedly installed at the front part of the corresponding longitudinal beam (12) in one-to-one correspondence with the longitudinal beam (12); 2) The U-shaped groove of the front bottom beam (62) is clamped on the third connecting piece (17) and fixed with the third connecting piece (17), the U-shaped groove of the first side bottom beam (42) is clamped on one end of the cross beam (11) and fixed with the cross beam (11), the U-shaped groove of the second side bottom beam (52) is clamped on the other end of the cross beam (11) and fixed with the cross beam (11), and the upper surfaces of the U-shaped grooves of the eleventh connecting edge (1303) of the rear bottom beam (130), the first side bottom beam (42), the second side bottom beam (52) and the front bottom beam (62) are flush and form a platform; 3) Place the base plate (2) on the platform formed in step 2).

2. The method of claim 1, wherein, The front bottom beam (62) and the first side bottom beam (42) are fixedly connected through a fifteenth connecting piece, the front bottom beam (62) and the second side bottom beam (52) are fixedly connected through a sixteenth connecting piece, the rear bottom beam (130) and the first side bottom beam (42) are fixedly connected through a seventeenth connecting piece, and the rear bottom beam (130) and the second side bottom beam (52) are fixedly connected through an eighteenth connecting piece.

3. The method of claim 1, wherein, The bottom surface of the cross beam (11) is provided with a first downward-opening sliding groove (101) along the length direction of the cross beam (11), a plurality of limiting pieces (13) are arranged in the first sliding groove (101), the head end of the limiting piece (13) is clamped in the first sliding groove (101) of the cross beam (11), the tail end of the limiting piece (13) is connected with the longitudinal beam (12) after extending out of the first sliding groove (101) and is fixed through a fastener (14); wherein the limiting piece (13) is a T-shaped bolt, and the fastener (14) is a nut.

4. The method of claim 1, wherein, The eleventh connecting edge (1303) of the rear bottom beam (130) is provided with anti-skid lines.

5. The method of claim 1, wherein, The longitudinal beam (12) is arranged in a U shape, the U-shaped groove on the longitudinal beam (12) is arranged inward, the third connecting piece (17) is arranged in a U shape, the U-shaped groove of the third connecting piece (17) is arranged inward, and the U-shaped groove of the front bottom beam (62) is clamped on the third connecting piece (17) and fixed with the third connecting piece (17) through a third corner code (120).

6. The method of claim 1, wherein, The front part of the longitudinal beam (12) is provided with a second connecting piece (16), the second connecting piece (16) is arranged in parallel with the cross beam (11), the two ends of the second connecting piece (16) are clamped and fixed in the U-shaped groove of the first side bottom beam (42) and the U-shaped groove of the second side bottom beam (52) respectively, and the rear end of the third connecting piece (17) is fixedly connected with the second connecting piece (16) through a second corner code (19).

7. The method of claim 1, wherein, The lower part of the longitudinal beam (12) is provided with a plurality of first connecting pieces (15), the first connecting piece (15) comprises a seventh connecting edge (151) and an eighth connecting edge (152), the seventh connecting edge (151) is arranged vertically, the eighth connecting edge (152) is arranged horizontally, the lower end of the seventh connecting edge (151) is connected with the eighth connecting edge (152), the seventh connecting edge (151) is fixedly connected with the longitudinal beam (12), and the eighth connecting edge (152) is located below the longitudinal beam (12) and in contact with the lower surface of the longitudinal beam (12).

8. A chassis characterized by, The chassis is assembled by using the assembling method of any one of claims 1-7.

9. A vehicle bed, characterized by, The chassis of claim 8 is included.

10. A vehicle characterized by comprising: The carriage of claim 9 is included.

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