A logistics device for rear bottom plate

Abstract

The present invention discloses a logistics device for a rear floor in the field of packaging box technology, aiming to solve the technical problem of low space utilization of automobile rear floor packaging boxes in the prior art. The logistics device comprises at least two device bodies distributed longitudinally, the top surface of the device body is concave inward, and a cavity is formed to match the bottom surface of the rear floor or the top surface of the rear floor of the automobile rear floor.

Description

Technical Field

[0001] The invention relates to a logistics device for a rear bottom plate, belonging to the technical field of packaging boxes. Background Art

[0002] Today, as the division of labor in the automotive industry develops rapidly, auto parts are usually manufactured by auto parts manufacturers scattered in different regions according to design drawings, and then transported to the assembly department of the auto company for unified assembly. In the process of auto parts leaving the factory, storage, transportation, and assembly, scientific selection of auto parts packaging boxes is conducive to minimizing transportation losses, reducing transportation costs, and improving transportation efficiency.

[0003] The rear floor of a car is built with steel materials to form a platform to install the rear seats and load the compartment, thus forming the rear compartment of the car. The rear floor of a car has a large lateral dimension, asymmetric protrusions in the longitudinal direction, and an irregular shape, resulting in low space utilization of the packaging box. At present, when storing or transporting the rear floor of a car, it is usually placed in a wooden or paper packaging box and filled with flexible materials such as sponge and foam to prevent it from being damaged. This packaging method not only has defects such as poor shock absorption, loose fixation, and easy contamination, but also makes it difficult to take into account its own strength and weight at the same time, which is not conducive to improving packaging quality and enhancing logistics efficiency. Summary of the invention

[0004] In view of the deficiencies of the prior art, the object of the present invention is to provide a logistics device for a rear floor, so as to solve the technical problem of low space utilization of a packaging box on the rear floor of an automobile in the prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A logistics device for a rear floor comprises at least two device bodies distributed longitudinally, wherein the top surface of the device body is inwardly concave to form a cavity matching the bottom surface or top surface of the rear floor of the automobile.

[0007] Preferably, the mold cavity includes a first mold cavity and a second mold cavity which are distributed in a stepped manner from low to high, and the second mold cavity is absorbed by the first mold cavity near the first mold cavity;

[0008] The first cavity accommodates the rear floor panel of the car with the bottom surface of the rear floor panel facing downward, and the second cavity accommodates the rear floor panel of the car with the top surface of the rear floor panel facing downward;

[0009] The middle area of ​​the second cavity surface of the second cavity is hollowed out inwardly to form a third hollow opening for accommodating the rear bridge convexity on the top surface of the rear bottom plate.

[0010] Preferably, the first cavity surface near the edge of the tool body is inwardly concave to form a side bridge top surface near the rear end of the bottom surface of the supporting rear bottom plate, and the bottom surface of the tool body is outwardly convex to form a side bridge bottom surface corresponding to the side bridge top surface;

[0011] The first cavity surface close to the second cavity supports the front end of the bottom surface of the rear bottom plate.

[0012] Preferably, the middle area of ​​the first cavity is hollowed out inward to form a first hollow opening and a second hollow opening separated by a first transverse bridge;

[0013] The first cross bridge top surface of the first cross bridge is lower than the first cavity surface, and the bottom surface of the body protrudes outward to form a first cross bridge bottom surface corresponding to the first cross bridge top surface.

[0014] Preferably, the top surface of the first transverse bridge is recessed inwards to form a first transverse bridge groove surface, the first transverse bridge groove surface protrudes outwards to form a groove surface support platform, and the top surface of the groove surface support platform is recessed inwards to form a first buffer groove.

[0015] Preferably, it also includes a pad connected to the bottom layer of the device body, and the height of the pad is not less than the depth of the bottom surface of the side bridge beyond the bottom surface of the body;

[0016] The cushion block is at least connected to the bottom surface of the body.

[0017] Preferably, the top surface of the cushion block is recessed inwards to form a cushion block groove surface, and the cushion block groove surface is protruded outwards to form a boss.

[0018] Preferably, the cushion block has a trapezoidal end surface.

[0019] Preferably, the second cavity surface close to the first cavity is inwardly recessed to form a second cross bridge top surface supporting the middle section of the top surface of the rear bottom plate;

[0020] The second cavity surface near the edge of the device body supports the front end of the top surface of the rear bottom plate.

[0021] Preferably, at least any one of the top surface of the side bridge, the first cavity surface, the second cavity surface, the top surface of the first cross bridge, and the top surface of the second cross bridge is recessed inward to form a second buffer groove.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the logistics equipment of the present invention is formed by stacking a number of equipment bodies in the longitudinal direction, and the top surface of the equipment body is recessed inward to form a first cavity and a second cavity that are distributed in a stepped manner from low to high, which are used to limit the rear bottom plate of the car laterally. The upper equipment body longitudinally limits the rear bottom plate of the car accommodated in the lower equipment body to avoid loose fixation. The first cavity adopts a sinking design, and the bottom surface of the rear bottom plate is placed downward to ensure that the rear bottom plate of the accommodated car does not exceed the top surface of the body upward; the second cavity is provided with a third hollow opening, and the rear bottom plate of the car in the cavity is placed with the top surface of the rear bottom plate facing downward, and the rear bridge convex on the top surface of the rear bottom plate is accommodated in the third hollow opening. The second cavity is absorbed by the first cavity near the first cavity, and the two rear bottom plates of the car are relatively flat near the front end of the rear bottom plate and cross-stacked with each other to achieve the purpose of fully utilizing the packaging space. The bottom layer of the equipment body is connected to a ring-shaped combination of pads to ensure that the bottom layer of the equipment body beyond the bottom surface of the body is fully accommodated. The pads adopt a stepped design of the pad top surface and the boss to enhance the shock absorption performance of the logistics equipment of the present invention. The logistics equipment of the present invention effectively overcomes the problem of low packaging space utilization through the clever design of the stepped distribution of the cavity, while avoiding white pollution caused by the filler; it is made of EPS material and has the advantages of good load-bearing, good cushioning and light weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a top surface structural stereogram of the device body in an embodiment of the present invention;

[0024] Figure 2 is a three-dimensional diagram of the bottom structure of the device body in an embodiment of the present invention;

[0025] Figure 3 is a top view of the device body in an embodiment of the present invention;

[0026] Figure 4 is a front view of the device body in an embodiment of the present invention;

[0027] Figure 5 is a bottom view of the device body in an embodiment of the present invention;

[0028] Figure 6 is a three-dimensional diagram of the top surface structure of the rear bottom plate in an embodiment of the present invention;

[0029] Figure 7 is a three-dimensional diagram of the bottom surface structure of the rear bottom plate in an embodiment of the present invention;

[0030] Figure 8 is a front view of the rear bottom plate in an embodiment of the present invention;

[0031] Fig. 9 is a top perspective view of a device body receiving a rear bottom plate in an embodiment of the present invention;

[0032] Fig.10 is a top perspective view of the device body receiving two rear bottom plates in an embodiment of the present invention;

[0033] Fig.11 is a front view of the device body receiving two rear bottom plates in an embodiment of the present invention;

[0034] Fig.12 is a top perspective view of two device bodies stacked in an embodiment of the present invention;

[0035] Fig.13 is a front view of two apparatus bodies stacked in an embodiment of the present invention;

[0036] Fig.14 is a three-dimensional diagram of a cushion block according to an embodiment of the present invention;

[0037] Fig.15 is a top perspective view of a combined spacer block of a device body in an embodiment of the present invention;

[0038] Fig.16 is a bottom perspective view of a combined cushion block of a device body according to an embodiment of the present invention;

[0039] Fig.17 It is a front view of the combined pad block of the appliance body in the embodiment of the present invention.

[0040] In the figure: 1, top surface of the body; 11, limiting column; 2, first cavity surface; 21, top surface of the side bridge; 3, first cross bridge; 31, top surface of the first cross bridge; 32, first cross bridge groove surface; 33, groove surface support platform; 34, first buffer groove; 35, through hole; 4, second cavity surface; 41, second buffer groove; 5, second cross bridge; 51, top surface of the second cross bridge; 52, first hollow opening; 53, second hollow opening; 54, third hollow opening; 6, bottom of the body Surface; 61, limit groove; 62, side bridge bottom surface; 63, first transverse bridge bottom surface; 64, second transverse bridge bottom surface; 65, material reduction groove; 7, automobile rear floor; 71, rear floor top surface; 72, rear floor front end; 73, front wing; 74, rear floor rear end; 75, rear wing; 76, rear axle convex; 77, rear floor bottom surface; 78, rear axle convex groove; 79, side wing; 8, pad; 81, pad top surface; 82, pad groove surface; 83, boss. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0042] It should be noted that in the description of the present invention, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. The terms "front", "rear", "left", "right", "up", and "down" used in the description of the present invention refer to the directions in the accompanying drawings, and the terms "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0043] The specific embodiment of the present invention provides a logistics device for a rear bottom plate, which is composed of a plurality of device bodies stacked in the longitudinal direction, and the bottom layer of the device body is connected to a pad 8. In this embodiment, the device body and the pad 8 are made of polystyrene foam (Expanded Polystyrene, EPS) in one piece. EPS is a light polymer, which is made of polystyrene resin with a foaming agent added, and heated to soften, generating gas to form a rigid closed-cell foam plastic, which has the characteristics of low water absorption, good heat preservation, light weight and high mechanical strength.

[0044] like Figures 6 to 8 As shown, the top surface structure stereogram, bottom surface structure stereogram, and front view of the rear bottom plate in the embodiment of the present invention are respectively shown. The rear bottom plate 7 of the automobile has a rear bottom plate top surface 71 and a rear bottom plate bottom surface 77. The rear bottom plate top surface 71 protrudes outward near the rear end 74 of the rear bottom plate to form a rear axle accommodating protrusion 76, and the corresponding rear bottom plate bottom surface 77 is concave inward near the rear end 74 of the rear bottom plate to form a rear axle accommodating groove 78. The rear axle accommodating groove 78 is used to adapt to the significantly protruding rear axle of the automobile. The rear bottom plate 7 of the automobile extends to both sides near the rear end 74 of the rear bottom plate to form a rear wing panel 75, and the rear bottom plate 7 of the automobile extends to both sides near the front end 72 of the rear bottom plate to form a slightly upturned front wing panel 73. The rear wing panel 75 and the front wing panel 73 are used to construct the bottom surface of the rear compartment of the automobile. The middle section of the rear bottom plate 7 of the automobile extends downward on both sides to form a side wing panel 79. As can be seen from the figure, in addition to the structural feature of large lateral dimensions, the rear floor panel 7 of the automobile also has special-shaped structures such as the rear axle convex 76, the rear wing panel 75, the front wing panel 73, and the side wing panel 79, which makes it difficult to utilize the packaging space during storage and transportation, and deformation is easy to occur due to uneven load.

[0045] like Figures 1 to 5As shown, they are respectively a top surface structure stereogram, a bottom surface structure stereogram, a top view, a front view, and a bottom view of the device body in an embodiment of the present invention. The top surface 1 of the device body is recessed inward, forming a first cavity and a second cavity that are distributed in a stepped manner from low to high, and the first cavity surface 2 of the first cavity is lower than the second cavity surface 4 of the second cavity. The first cavity is adapted to the shape of the rear bottom plate bottom surface 77 of the rear bottom plate 7 of the automobile, and is used to accommodate the rear bottom plate 7 of the automobile with the rear bottom plate bottom surface 77 facing downward. The second cavity is adapted to the shape of the rear bottom plate top surface 71 of the rear bottom plate 7 of the automobile, and is used to accommodate the rear bottom plate 7 of the automobile with the rear bottom plate top surface 71 facing downward. The above-mentioned cavity design plays a role in lateral limitation and fixing of the rear bottom plate 7 of the automobile accommodated therein. As can be seen from the figure, the area of ​​the second cavity close to the first cavity is absorbed by the first cavity, that is, there is an overlapping part between the second cavity and the first cavity in the lateral direction. The purpose of adopting this design is to make full use of the structural characteristics of the automobile rear floor panel 7, which has a large lateral dimension and a small longitudinal dimension near the front end. The first cavity and the second cavity each accommodate one automobile rear floor panel 7, and at the same time, the front ends of the two accommodated automobile rear floor panels 7 are overlapped to improve the packaging space utilization rate of the automobile rear floor panel 7, appropriately reduce the lateral dimension of the device body, and facilitate production and transportation.

[0046] More specifically, the first cavity surface 2 near the second cavity supports the front end of the rear bottom plate bottom surface 77. The first cavity surface 2 near the left edge of the device body is recessed inward to form a side bridge top surface 21 supporting the rear end of the rear bottom plate bottom surface 77, that is, the first cavity surface 2 is sunken to adapt to the longitudinal size of the rear bridge convex 76 on the rear bottom plate 7 of the automobile, ensuring that the rear bottom plate 7 of the automobile accommodated does not exceed the main body top surface 1 upward. Correspondingly, the main body bottom surface 6 of the device body, that is, the back of the side bridge top surface 21, bulges outward to form a side bridge bottom surface 62 corresponding to the side bridge top surface 21.

[0047] More specifically, the middle area of ​​the first cavity is hollowed out inwards to form a first hollow opening 52 and a second hollow opening 53 separated by the first cross bridge 3. The first cross bridge top surface 31 of the first cross bridge 3 is lower than the first cavity surface 2, and is used to support the side wing plate 79 formed by the downward extension of the middle section of the rear bottom plate bottom surface 77. This design has the same function as the aforementioned side bridge top surface 21, and also sinks the first cavity surface 2 at this location to adapt to the longitudinal size of the side wing plate 79, ensuring that the rear bottom plate 7 of the accommodated automobile does not exceed the main body top surface 1 upward. Correspondingly, the main body bottom surface 6, i.e., the back side of the first cross bridge top surface 31, bulges outwards to form a first cross bridge bottom surface 63 corresponding to the first cross bridge top surface 31. The purpose of designing the first cross bridge 3 is to support the middle section of the rear bottom plate 7 of the automobile to avoid deformation of the rear bottom plate 7 of the automobile due to excessive overhang.

[0048] Preferably, the middle section of the top surface 31 of the first transverse bridge is recessed inwards to form a first transverse bridge groove surface 32, the first transverse bridge groove surface 32 is protruded outwards to form a groove surface support platform 33, and the top surface of the groove surface support platform 33 is recessed inwards to form a first buffer groove 34. The groove surface support platform 33 is used to support the middle section of the bottom surface 77 of the rear floor. The purpose of designing the first buffer groove 34 is that when longitudinal acceleration occurs due to bumps or collisions during storage and transportation, the groove surface support platform 33 is compressed and deformed, which inevitably causes its lateral size to increase. At this time, the first buffer groove 34 provides a lateral accommodation space for the flattened groove surface support platform 33, thereby enhancing the shock absorbing performance and preventing the rear floor 7 of the automobile from being deformed or broken due to bumps or collisions during storage and transportation. In addition, the first transverse bridge groove surface 32 is hollowed out inwards to form a plurality of through holes 35, the purpose of which is to save materials and reduce weight.

[0049] More specifically, the middle area of ​​the second cavity is hollowed out inwardly to form a third hollow opening 54 for accommodating the rear bridge convexity 76 of the rear bottom plate top surface 71. The left side of the third hollow opening 54 is the second cross bridge 5, and the second cross bridge top surface 51 of the second cross bridge 5 is formed by the second cavity surface 4 being recessed inwardly, and is used to support the middle section of the rear bottom plate top surface 71 of the rear bottom plate 7 of the automobile accommodated in the second cavity. The second cavity surface 4 near the right edge of the device body is used to support the rear end of the rear bottom plate top surface 71, and the front end of the rear bottom plate top surface 71 extends leftward to the first cavity, and is located above the front end of the rear bottom plate 7 of the automobile accommodated in the first cavity.

[0050] Preferably, at least any one of the aforementioned side bridge top surface 21, the first cavity surface 2, the second cavity surface 4, the first cross bridge top surface 31, and the second cross bridge top surface 51 is recessed inward to form a second buffer groove 41. The second buffer groove 41 plays the same role as the aforementioned first buffer groove 34, providing a lateral accommodation space when the lateral dimension becomes larger due to pressure, thereby enhancing the shock absorbing performance. It should be noted that the aforementioned first buffer groove 34 and the second buffer groove 41 can be either a through groove or a non-through groove, and both can achieve the effect of providing a lateral deformation space for the supporting part of the device body. The aforementioned first hollow opening 52, the second hollow opening 53, and the third hollow opening 54 all play the role of saving materials and reducing weight.

[0051] More specifically, the four corners of the top surface 1 of the main body are protruded outward to form limiting columns 11, and the four corners of the bottom surface 6 of the main body are recessed inward to form limiting grooves 61 corresponding to the limiting columns 11. When multiple appliance bodies are stacked, the limiting columns 11 of the lower appliance body are embedded in the limiting grooves 61 of the upper appliance body to enhance the stacking stability. The upper appliance body plays a role in longitudinal limiting the rear floor 7 of the car accommodated by the lower appliance body.

[0052] like Fig. 9The figure is a top three-dimensional view of a rear bottom plate received by the apparatus body in an embodiment of the present invention. The rear bottom plate bottom plate 77 of the automobile rear bottom plate 7 faces downward and is received in the first cavity. The side bridge top surface 21 supports the rear end of the rear bottom plate bottom plate 77. The first cross bridge top surface 31 supports the side wing plates 79 on both sides of the middle section of the rear bottom plate bottom plate 77. The groove surface support platform 33 supports the middle section of the rear bottom plate bottom plate 77. The first cavity surface 2 supports the front end of the rear bottom plate bottom plate 77. Since the side bridge top surface 21 and the first cross bridge top surface 31 are sunken compared to the first cavity surface 2, it is ensured that while accommodating the rear bridge convex 76 and the side wing plates 79 with larger longitudinal dimensions, the automobile rear bottom plate 7 does not extend upward beyond the top surface 1 of the body. The front end 72 of the rear bottom plate and the front wing plates 73 on both sides thereof are slightly upturned and supported on the relatively high first cavity surface 2.

[0053] like Fig.10 As shown, it is a three-dimensional view of the top surface of the device body accommodating two rear bottom plates in the embodiment of the present invention. On the basis of accommodating one automobile rear bottom plate 7 by the first cavity, another automobile rear bottom plate 7 is accommodated by the second cavity. The specific accommodation method is as follows: the rear bottom plate top surface 71 of the automobile rear bottom plate 7 faces downward, and the rear end of the rear bottom plate top surface 71 is supported by the second cavity surface 4 on the right side of the second cavity. The rear bridge convexity 76 of the rear bottom plate top surface 71 is accommodated in the third hollow opening 54, and the middle section of the rear bottom plate top surface 71 is supported by the second cross bridge top surface 51 on the left side of the second cavity. The front end of the rear bottom plate top surface 71 extends leftward to the first cavity and is located above the front end of the automobile rear bottom plate 7 accommodated by the first cavity.

[0054] like Fig.11 As shown, it is a front view of the device body accommodating two rear bottom plates in an embodiment of the present invention. It can be seen from the figure that the side bridge bottom surface 62 and the first cross bridge bottom surface 63 are significantly sunken, and the second cross bridge bottom surface 64 is slightly sunken, all of which exceed the bottom surface 6 of the main body. The rear bottom plate 7 of the automobile is accommodated in the second cavity, and its rear bridge protrusion 76 exceeds the bottom surface 6 of the main body through the third hollow opening 54. When multiple device bodies are stacked, the part of the upper device body that exceeds the bottom surface 6 of the main body is accommodated by the first cavity and the second cavity of the lower device body, thereby controlling the layer height of each layer of the device body, so as to improve the utilization rate of the packaging space. Specifically, Fig.12 and Fig.13 1 and 2 are respectively a top perspective view and a front view of two stacked device bodies according to an embodiment of the present invention.

[0055] Based on the above technical solution, there is a technical problem that the bottom layer of the equipment body cannot be accommodated due to the part of the bottom layer of the equipment body that exceeds the bottom surface 6 of the body. In order to avoid wasting the accommodation space of the bottom layer of the equipment body, the logistics equipment of the present invention is provided with a plurality of cushion blocks 8 connected to the bottom layer of the equipment body on the basis of the equipment body. Fig.14As shown, it is a three-dimensional diagram of the cushion block in the embodiment of the present invention. The cushion block 8 has trapezoidal end faces at both ends to enhance the supporting performance of the cushion block 8. The cushion block top surface 81 of the cushion block 8 is recessed inward to form a cushion block groove surface 82, and the cushion block groove surface 82 is convex outward to form a boss 83. When the number of the carried equipment bodies is large and the rear floor 7 of the received car is heavy, and longitudinal acceleration occurs due to bumps during storage and transportation, the cushion block top surface 81 is deformed downward under the force, and the groove body is horizontally extended until the cushion block top surface 81 is compressed to the height of the boss 83. At this time, the cushion block top surface 81 and the boss 83 jointly bear the weight. This design is conducive to enhancing the shock-absorbing performance of the logistics equipment of the present invention. It should be noted that the height of the cushion block 8 should not be less than the depth of the side bridge bottom surface 62 and the first cross bridge bottom surface 63 exceeding the bottom surface 6 of the main body to ensure sufficient accommodation of the part of the bottom layer of the equipment body exceeding the bottom surface 6 of the main body. The connection between the cushion block 8 and the bottom layer of the device body can be achieved by snap-fitting, bonding, etc., or by integrating the two into one.

[0056] The cushion block 8 needs to be used in combination with multiple ones. Figures 15 to 17 As shown, they are respectively a top perspective view, a bottom perspective view, and a front view of the combined pad of the device body in the embodiment of the present invention. The pad 8 is connected to the bottom surface 6 of the body to form an annular combined structure. At the same time, in order to improve the overall support performance, a plurality of pads 8 are also connected to the bottom surface 64 of the second cross bridge. Since the bottom surface 64 of the second cross bridge slightly exceeds the bottom surface 6 of the body, the height of the pad 8 connected thereto should also be reduced accordingly to ensure that it is compatible with the annular combined structure of the aforementioned pad 8.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A logistics device for a rear floor, characterized in that: The device comprises at least two longitudinally distributed device bodies, the top surface (1) of the device body being recessed inwardly to form a cavity matching the rear bottom plate bottom surface (77) or the rear bottom plate top surface (71) of the rear bottom plate (7) of the automobile; the rear bottom plate (7) of the automobile comprises a rear bottom plate top surface (71) and a rear bottom plate bottom surface (77); the rear bottom plate top surface (71) protrudes outwardly near the rear end (74) of the rear bottom plate to form a rear axle receiving protrusion (76), and the corresponding rear bottom plate bottom surface (77) is recessed inwardly near the rear end (74) of the rear bottom plate to form a rear axle receiving groove (78); The mold cavity comprises a first mold cavity and a second mold cavity which are distributed in a stepped manner from low to high, and the second mold cavity is absorbed by the first mold cavity near the first mold cavity, that is, the second mold cavity overlaps with the first mold cavity in the horizontal direction; the first mold cavity accommodates the rear floor panel (7) of the automobile with the rear floor panel bottom surface (77) facing downward, and the second mold cavity accommodates the rear floor panel (7) of the automobile with the rear floor panel top surface (71) facing downward; the middle area of ​​the second mold cavity surface (4) of the second mold cavity is hollowed out inwardly to form a third hollow opening (54) for accommodating the rear bridge convex (76) of the rear floor panel top surface (71); The first cavity surface (2) near the edge of the tool body of the first cavity is inwardly recessed to form a side bridge top surface (21) supporting the rear bottom plate bottom surface (77), and the tool body bottom surface (6) is outwardly protruding to form a side bridge bottom surface (62) corresponding to the side bridge top surface (21), that is, the first cavity surface (2) at this location is sunken to adapt to the longitudinal size of the rear bridge convexity (76) on the rear bottom plate (7) of the automobile, ensuring that the rear bottom plate (7) accommodated in the automobile does not extend upward beyond the main body top surface (1); the first cavity surface (2) near the second cavity supports the rear bottom plate bottom surface (77) near the front end; The middle area of ​​the first cavity is hollowed out inwardly to form a first hollow opening (52) and a second hollow opening (53) separated by a first cross bridge (3); the first cross bridge top surface (31) of the first cross bridge (3) is lower than the first cavity surface (2); the bottom surface (6) of the body is protruded outwardly to form a first cross bridge bottom surface (63) corresponding to the first cross bridge top surface (31), that is, the first cavity surface (2) is sunken to adapt to the longitudinal size of the side wing plate (79) to ensure that the rear bottom plate (7) of the accommodated vehicle does not extend upward beyond the top surface (1) of the body; The second cavity surface (4) near the first cavity is recessed inwardly to form a second cross bridge top surface (51) supporting the middle section of the rear bottom plate top surface (71) for supporting the middle section of the rear bottom plate top surface (71) of the rear bottom plate (7) of the automobile accommodated in the second cavity; the second cavity surface (4) near the right edge of the device body is used to support the rear end near the rear bottom plate top surface (71), and the front end near the rear bottom plate top surface (71) in the second cavity extends leftward to the first cavity and is located above the front end near the rear bottom plate (7) of the automobile accommodated in the first cavity.

2. The logistics device for the rear floor according to claim 1, characterized in that: The top surface (31) of the first transverse bridge is recessed inwardly to form a first transverse bridge groove surface (32), the first transverse bridge groove surface (32) is protruded outwardly to form a groove surface support platform (33), and the top surface of the groove surface support platform (33) is recessed inwardly to form a first buffer groove (34).

3. The logistics device for the rear floor according to claim 1, characterized in that: It also includes a cushion block (8) connected to the bottom layer of the device body, wherein the height of the cushion block (8) is not less than the depth of the bottom surface of the side bridge (62) beyond the bottom surface of the body (6); The cushion block (8) is at least connected to the bottom surface (6) of the main body.

4. The logistics device for the rear floor according to claim 3, characterized in that: The cushion block top surface (81) of the cushion block (8) is recessed inwardly to form a cushion block groove surface (82), and the cushion block groove surface (82) is protruded outwardly to form a boss (83).

5. The logistics device for the rear floor according to claim 3, characterized in that: The cushion block (8) has a trapezoidal end surface.

6. The logistics device for the rear floor according to claim 1, characterized in that: At least one of the side bridge top surface (21), the first cavity surface (2), the second cavity surface (4), the first cross bridge top surface (31), and the second cross bridge top surface (51) is recessed inwards to form a second buffer groove (41).

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