A device for adjusting the interior space of a cargo box

Abstract

The application discloses a device for adjusting the internal space of a container, a base frame, which is in the shape of an I-beam; a tray support column fixedly arranged on the flange part of the base frame, wherein a sliding groove is arranged on the tray support column; a tray fixing support fixedly arranged on the tray support column and in sliding connection with the sliding groove; a tray fixedly arranged on the tray fixing support; four identical rollers, namely a first roller, a second roller, a third roller and a fourth roller; a partition plate fixedly arranged on the web of the base frame; a motor fixedly arranged on the partition plate; and a steel cable, one end of which is fixedly connected to the output shaft of the motor and sequentially passes through the first roller, the second roller, the third roller and the fourth roller and is fixed to the end of the motor away from the output shaft.

Description

Technical Field

[0001] This invention relates to the field of truck cargo box technology, and in particular to a device for adjusting the internal space of a cargo box. Background Technology

[0002] As an important means of transportation, trucks or pickup trucks have seen a surge in development in recent years, and pickup trucks are gradually evolving into family-use vehicles. For daily family use, pickup trucks are often used for transportation, family outings, camping activities, etc. due to their large rear cargo space.

[0003] In various usage scenarios such as transportation, outings, and camping, the items carried in a pickup truck bed may differ. Typically, the compartments in the bed are relatively fixed, which can prevent the loading of large items or items requiring special protection, such as large kitchen utensils for outdoor cooking, fishing gear and water tanks for outdoor fishing, and clothing and food that need to be waterproof and stain-resistant. To meet the diverse needs of customers, the cargo bed's space partitioning requires greater flexibility; therefore, there is an urgent need for a device that allows for free adjustment of the cargo bed's internal space to solve the inconvenience caused by the aforementioned problems. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a device for adjusting the internal space of a cargo container.

[0005] According to a first aspect of the present invention, a device for adjusting the internal space of a cargo box is characterized in that it comprises:

[0006] The base frame is I-shaped;

[0007] Two identical pallet support columns, the first pallet support column and the second pallet support column are fixedly installed on the flange portion of the base frame, and the pallet support columns are provided with sliding grooves;

[0008] Two identical pallet fixing supports, a first pallet fixing support and a second pallet fixing support, are mounted on the pallet support column, and the first pallet fixing support and the second pallet fixing support are slidably connected to the slide groove;

[0009] The pallet is fixedly mounted on the pallet fixing support;

[0010] The rollers include four rollers with the same structure, namely a first roller, a second roller, a third roller, and a fourth roller. The first roller and the second roller are fixedly disposed at both ends of the first pallet support column, and the third roller and the fourth roller are fixedly disposed at both ends of the second pallet support column.

[0011] A partition plate, which is fixedly installed at the web of the base frame;

[0012] The motor is fixedly mounted on the partition.

[0013] A steel cable, one end of which is fixedly connected to the output shaft of the motor, passes sequentially through a first roller, a first tray fixing support, a second roller, a third roller, a second tray fixing support, and a fourth roller and is fixed to the end of the motor away from the output shaft.

[0014] According to the present invention, a device for adjusting the internal space of a cargo box includes a base frame that serves as the backbone of the entire device, supporting the entire device. Through holes can be used to fix the base frame to the bottom of the cargo box using fixing bolts. A first pallet support column and a second pallet support column are fixedly positioned at the center of the base frame flange. On one hand, they provide support points for the first and second pallet fixing supports, as well as for the four rollers: the first, second, third, and fourth rollers. On the other hand, sliding grooves are provided in the first and second pallet support columns to facilitate the movement of the first and second pallet fixing supports. The first and second pallet fixing supports serve two purposes: firstly, to secure the pallet, and secondly, to allow it to move up and down within the sliding groove, thus freely raising and lowering the pallet. The pallets divide the interior space of the cargo container, allowing for partitioning. Users can add multiple pallets as needed, providing more adjustable internal space. Rollers, serving as crucial guiding devices, are located at both ends of the first and second pallet support columns, guiding the steel cables and providing support. The function of the steel cable; the partition has a mesh design, which serves two purposes: firstly, it provides a final fixing point for the ropes used to bind objects, preventing the objects from shifting due to bumps during travel; secondly, it separates the internal space; the motor and steel cable serve as the driving and transmission components of the entire device. One end of the steel cable is fixedly connected to the output shaft of the motor and passes sequentially through the first roller, the first tray fixing support, the second roller, the third roller, the second tray fixing support, and the fourth roller, which are then fixed to the other end of the motor, forming a closed loop. When the motor rotates forward, the steel cable retracts... The cable, passing through the first roller, pulls the first pallet fixing support downwards. Under the tension of the cable, the first pallet moves downwards in the groove. The cable then passes through the second and third rollers. Since the second and third rollers are in opposite directions, the second pallet fixing support is subjected to the downward force of the cable and moves downwards in the groove. This results in both the first and second pallet fixing supports moving downwards simultaneously, driving the pallet downwards. The movement is then transmitted to the other end of the motor via the fourth roller, completing the motion circuit. Similarly, when the motor reverses, both the first and second pallet fixing supports move upwards simultaneously, driving the pallet upwards.

[0015] According to some embodiments of the present invention, a steel cable collecting device is fixedly provided at one end of the motor output shaft. The motor rotates forward or reverse to drive the steel cable collecting device to rotate forward or reverse, thereby shrinking and stretching the steel cable. The purpose of this is to prevent the steel cable from falling directly to the bottom of the cargo box and causing steel cable accumulation when shrinking the steel cable.

[0016] According to some embodiments of the present invention, the web portion of the base frame is provided with a slot and a threaded hole, and the partition is snapped into the slot and fixedly connected by bolts; by adding the slot in the web of the base frame, the partition is snapped into the slot and fixed by bolts, which can ensure the structural stability of the partition and also allow the partition to be removed when not necessary.

[0017] According to some embodiments of the present invention, a cross-cable guide rail is fixedly provided on the partition plate, and the steel cable is disposed in the steel cable guide rail. The steel cable is embedded in the first tray fixing support and the second tray fixing support and is fixedly connected to both the first tray fixing support and the second tray fixing support. The cross-cable guide rail of the steel cable is fixedly provided on the partition plate to reduce the relative friction between the cross steel cables when the steel cables move, thereby reducing the breakage of the steel cables due to long-term friction during use. Another advantage is to avoid the situation where the device stops moving and causes the device to jam when the motor speed is not high, without the steel cable guide rail.

[0018] According to some embodiments of the present invention, the length of the flange in the base frame is 1000mm-1150mm, and the length of the web plate in the base frame is 900mm-1050mm, the dimensions of which conform to the size of the interior space of most automobile cargo boxes.

[0019] According to some embodiments of the present invention, several crossbeams are symmetrically arranged on both sides of the web of the base frame, and several threaded through holes are provided on the crossbeams. By adding crossbeams on both sides of the web and adding threaded holes on the crossbeams, and fixing them to the bottom of the cargo box with bolts, the device can be further stabilized inside the cargo box, avoiding instability of the device due to loosening of the fixing structure during driving.

[0020] According to some embodiments of the present invention, both the first pallet fixing support and the second pallet fixing support are provided with a groove and a threaded hole at the end away from the slide groove. The pallet is engaged inside the groove of the first pallet fixing support and the second pallet fixing support, and the pallet is fixedly connected to the first pallet fixing support and the second pallet fixing support by bolts. The groove is used to engage the pallet in the first pallet fixing support and the second pallet fixing support, and the threaded hole is used to fix the pallet in the first pallet fixing support and the second pallet fixing support by bolts after the pallet is engaged in the first pallet fixing support and the second pallet fixing support. This makes the pallet structure more stable and increases the load-bearing capacity.

[0021] According to some embodiments of the present invention, the tray is a box, the top of the box is provided with a removable box cover, the end of the tray away from the partition is provided with a plurality of threaded holes, and the base frame flange is fixedly provided with a tray locking device near the end of the tray. The tray locking device can be raised and lowered longitudinally. The end of the tray away from the partition is connected to the tray locking device by bolts. The box-shaped tray can use the protruding part of the edge as a boundary restriction. The end of the tray away from the partition is provided with a plurality of threaded holes, and the base frame flange is fixedly provided with a tray locking device near the end of the tray. The tray is fixed with bolts between the threaded holes and the tray locking device. In this way, both ends of the tray are fixed with devices, thus achieving a balance and avoiding the phenomenon of the tray bending due to excessive weight of the load.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a first structural schematic diagram of a device for adjusting the internal space of a cargo box according to an embodiment of the present invention;

[0025] Figure 2 This is a second structural schematic diagram of a device for adjusting the internal space of a cargo box according to an embodiment of the present invention.

[0026] Reference numerals: 1. Base frame; 21. First pallet support column; 22. Second pallet support column; 31. First roller; 32. Second roller; 33. Third roller; 34. Fourth roller; 4. Motor; 51. First pallet fixing support; 52. Second pallet fixing support; 6. Steel cable; 7. Slide groove; 8. Partition plate; 9. Crossbeam; 10. Through hole; 11. Pallet. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Example 1

[0031] See Figure 1 As shown, a device for adjusting the internal space of a cargo box includes:

[0032] Base frame 1, which is I-shaped and has through holes 10;

[0033] Two identical pallet support columns, a first pallet support column 21 and a second pallet support column 22, are fixedly installed on the flange portion of the base frame 1, and the pallet support columns are provided with sliding grooves 7.

[0034] Two identical pallet fixing supports, a first pallet fixing support 51 and a second pallet fixing support 52, are mounted on the pallet support column. The first pallet fixing support 51 and the second pallet fixing support 52 are slidably connected to the slide groove 7.

[0035] Pallet 11, which is fixedly mounted on the pallet fixing support;

[0036] The rollers include four rollers with the same structure, namely a first roller 31, a second roller 32, a third roller 33 and a fourth roller 34. The first roller 31 and the second roller 32 are fixedly disposed at both ends of the first pallet support column 21, and the third roller 33 and the fourth roller 34 are fixedly disposed at both ends of the second pallet support column 22.

[0037] Partition 8, the partition 8 is fixedly installed at the web position of the base frame 1;

[0038] Motor 4, which is fixedly mounted on the partition plate 8;

[0039] The steel cable 6 has one end fixedly connected to the output shaft of the motor 4, and passes through the first roller (31), the first tray fixing support 51, the second roller 32, the third roller 33, the second tray fixing support 52, and the fourth roller 34 in sequence to fix the end of the motor 4 away from the output shaft.

[0040] Specifically, a steel cable collecting device is fixedly installed at one end of the output shaft of the motor 4;

[0041] The web portion of the base frame 1 is provided with a slot and a threaded hole, and the partition plate 8 is snapped into the slot and fixedly connected by bolts.

[0042] A cross steel cable guide rail is fixedly installed on the partition plate 8. The steel cable 6 is installed in the steel cable guide rail. The steel cable 6 is embedded in the first pallet fixing support 51 and the second pallet fixing support 52 and is fixedly connected to both the first pallet fixing support 51 and the second pallet fixing support 52.

[0043] The length of the flange in the base frame 1 is 1000mm-1150mm, and the length of the web plate in the base frame 1 is 900mm-1050mm;

[0044] Several crossbeams 9 are symmetrically arranged on both sides of the web of the base frame 1, and several threaded through holes are provided on the crossbeams 9.

[0045] The first pallet fixing support 51 and the second pallet fixing support 52 are both provided with grooves and threaded holes at the ends away from the slide groove 7.

[0046] The first tray fixing support 51 and the second tray fixing support 52 are engaged with the tray 11 inside the grooves, and the tray 11 is fixedly connected to the first tray fixing support 51 and the second tray fixing support 52 by bolts.

[0047] The tray 11 is a box body, the top of the box body is provided with a detachable box cover, and the end of the tray 11 away from the partition 8 is provided with several threaded holes;

[0048] A tray locking device is fixedly installed on one end of the base frame 1 near the tray 11. The tray locking device can be raised and lowered longitudinally. The end of the tray 11 away from the partition 8 is connected to the tray locking device by bolts.

[0049] Based on the above structure, the base frame 1 serves to support the entire device, and the through hole 10 can be fixed to the bottom of the cargo box using fixing bolts; the first pallet 11 support column 21 and the second pallet 11 support column 22 are fixedly arranged at the center position of the flange of the base frame 1, on the one hand, providing support points for the first pallet 11 fixed support 51 and the second pallet 11 fixed support 52, and also providing support points for the four rollers: the first roller 31, the second roller 32, the third roller 33, and the fourth roller 34; on the other hand, the first pallet 11 support column 21 and the second pallet 11 support column 22 have sliding grooves 7 to facilitate the movement of the first pallet 11 fixed support 51 and the second pallet 11 fixed support 52; the first pallet 11 fixed support 51... The first and second pallet 11 fixing supports 52 serve two purposes: firstly, they fix the pallet 11, and secondly, they can move up and down in the slide 7, allowing the pallet 11 to be raised and lowered freely. The pallet 11 can divide the internal space of the cargo box, allowing for partitioning. Users can install multiple pallets 11 as needed, providing more adjustable internal space. The rollers, as important guiding devices, are located at both ends of the first pallet 11 support column 21 and the second pallet 11 support column 22, respectively. They guide the steel cable 6 and also support it. (The last sentence appears to be incomplete and possibly refers to a partition.) 8 is a mesh design. On one hand, it facilitates the use of ropes to tie objects, providing a final fixing point to prevent objects from shifting due to bumps during travel. On the other hand, it also separates the internal space. The motor 4 and steel cable 6 serve as the driving and transmission components of the entire device. One end of the steel cable 6 is fixedly connected to the output shaft of the motor 4 and passes through the first roller 31, the first tray 11 fixing support 51, the second roller 32, the third roller 33, the second tray 11 fixing support 52, and the fourth roller 34, and is fixed to the other end of the motor 4, forming a closed loop. When the motor 4 rotates forward, the steel cable 6 is retracted, and the steel cable 6 is pulled downward through the first roller 31. The first pallet 11 is fixed at the support 51. Under the tension of the steel cable 6, the first pallet 11 moves downward in the slide groove 7. The steel cable 6 then passes through the second roller 32 and the third roller 33. Since the second roller 32 and the third roller 33 are in opposite directions, the second pallet 11 fixed support 52 is subjected to the downward force of the steel cable 6 and moves downward in the slide groove 7. This results in the first pallet 11 fixed support 51 and the second pallet 11 fixed support 52 moving downward at the same time, driving the pallet 11 to move downward. The movement is then transmitted to the other end of the motor 4 through the fourth roller 34, completing the motion circuit. Similarly, when the motor 4 reverses, the first pallet 11 fixed support 51 and the second pallet 11 fixed support 52 move upward at the same time, driving the pallet 11 to move upward.

[0050] In addition, a steel cable 6 collecting device is fixedly installed at one end of the output shaft of the motor 4. The forward or reverse rotation of the motor 4 drives the steel cable 6 collecting device to rotate forward or reverse, thereby retracting and extending the steel cable 6. This is to prevent the steel cable 6 from falling directly to the bottom of the cargo box and accumulating when it is retracted due to excessive length. The partition 8 is snapped into the slot and fixed with bolts. The partition 8 is snapped into the slot through the slot of the web plate in the base frame 1 and fixed with bolts. This ensures the structural stability of the partition 8 and also allows the partition 8 to be removed when not needed. The steel cable 6 is set in the... In the described steel cable 6 guide rail, the steel cable 6 is embedded in the first tray 11 fixed support 51 and the second tray 11 fixed support 52 and is fixedly connected to both the first tray 11 fixed support 51 and the second tray 11 fixed support 52; the cross guide rail of the steel cable 6 is fixedly installed on the partition plate 8 to reduce the relative friction between the crossing steel cables 6 when the steel cable 6 moves, thereby reducing the breakage of the steel cable 6 due to long-term friction during use. Another advantage is to avoid the situation where the friction between the steel cables 6 may cause the device to stop moving and cause the device to jam when the motor 4 speed is not high, without the steel cable 6 guide rail; the base frame 1 The length of the middle flange is 1000mm, and the length of the web of the base frame 1 is 900mm. These dimensions conform to the internal space of most truck cargo boxes. Several crossbeams 9 are symmetrically arranged on both sides of the web of the base frame 1, and several threaded holes 10 are provided on the crossbeams 9. By adding crossbeams 9 to both sides of the web and adding threaded holes to the crossbeams 9, and fixing them to the bottom of the cargo box with bolts, the device can be further stabilized inside the cargo box, preventing instability caused by loosening of the fixing structure during driving. The first pallet 11 fixing support 51 and the second pallet 11 fixing support 52 are located away from the slide 7. Both ends are provided with grooves and threaded holes. The first tray 11 fixing support 51 and the second tray 11 fixing support 52 are used to engage the tray 11 inside the grooves. The tray 11 is fixedly connected to the first tray 11 fixing support 51 and the second tray 11 fixing support 52 by bolts. The grooves are used to engage the tray 11 into the first tray 11 fixing support 51 and the second tray 11 fixing support 52. The threaded holes are used to fix the tray 11 with bolts after it is engaged into the first tray 11 fixing support 51 and the second tray 11 fixing support 52. This makes the structure of the tray 11 more stable and increases its load-bearing capacity.The tray 11 is a box-shaped structure with an open top. Several threaded holes are provided at the end of the tray 11 away from the partition 8. A tray 11 locking device is fixedly installed on the flange of the base frame 1 near the end of the tray 11. This locking device is vertically adjustable. The end of the tray 11 away from the partition 8 is connected to the tray 11 locking device by bolts. The box-shaped tray 11 utilizes its protruding edges as a boundary constraint. The tray 11 has several threaded holes at the end away from the partition 8, and the base frame 1 flange is fixedly installed on the end of the tray 11 near the tray 11. The locking device is secured to the tray 11 by bolts through the threaded holes. This ensures that both ends of the tray 11 are secured, achieving a balance and preventing the tray 11 from bending due to excessive weight.

[0051] Example 2

[0052] participate Figure 2 As shown, a device for adjusting the internal space of a cargo box includes:

[0053] Base frame 1, which is I-shaped and has through holes 10;

[0054] Two identical pallet support columns, a first pallet support column 21 and a second pallet support column 22, are fixedly installed on the flange portion of the base frame 1, and the pallet support columns are provided with sliding grooves 7.

[0055] Two identical pallet fixing supports, a first pallet fixing support 51 and a second pallet fixing support 52, are mounted on the pallet support column. The first pallet fixing support 51 and the second pallet fixing support 52 are slidably connected to the slide groove 7.

[0056] The rollers include four rollers with the same structure, namely a first roller 31, a second roller 32, a third roller 33 and a fourth roller 34. The first roller 31 and the second roller 32 are fixedly disposed at both ends of the first pallet support column 21, and the third roller 33 and the fourth roller 34 are fixedly disposed at both ends of the second pallet support column 22.

[0057] Partition 8, the partition 8 is fixedly installed at the web position of the base frame 1;

[0058] Motor 4, which is fixedly mounted on the partition plate 8;

[0059] The steel cable 6 has one end fixedly connected to the output shaft of the motor 4, and passes through the first roller (31), the first tray fixing support 51, the second roller 32, the third roller 33, the second tray fixing support 52, and the fourth roller 34 in sequence to fix the end of the motor 4 away from the output shaft.

[0060] This embodiment is a variation of Embodiment 1, which removes the pallet structure and retains the middle partition, allowing the space to be divided into two areas. This satisfies users who only need the cargo box space to be divided into two areas.

[0061] 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," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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 the invention.

[0062] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0063] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0064] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for adjusting the internal space of a cargo box, characterized in that, include: The base frame (1) is I-shaped and has through holes (10). Two identical pallet support columns, the first pallet support column (21) and the second pallet support column (22), are fixedly installed on the flange portion of the base frame (1), and the pallet support columns are provided with sliding grooves (7). Two identical pallet fixing supports, a first pallet fixing support (51) and a second pallet fixing support (52), are mounted on the pallet support column. The first pallet fixing support (51) and the second pallet fixing support (52) are slidably connected to the slide groove (7). The tray (11) is fixedly mounted on the tray fixing support; The rollers include four rollers with the same structure, namely a first roller (31), a second roller (32), a third roller (33), and a fourth roller (34). The first roller (31) and the second roller (32) are fixedly disposed at both ends of the first pallet support column (21), and the third roller (33) and the fourth roller (34) are fixedly disposed at both ends of the second pallet support column (22). Partition (8), the partition (8) is fixedly installed at the web position of the base frame (1); Motor (4), the motor (4) is fixedly mounted on the partition (8); A steel cable (6) is fixedly connected at one end to the output shaft of the motor (4) and passes through the first roller (31), the first tray fixing support (51), the second roller (32), the third roller (33), the second tray fixing support (52), and the fourth roller (34) in sequence to be fixed to the end of the motor (4) away from the output shaft.

2. The device for adjusting the internal space of a cargo box according to claim 1, characterized in that, A steel cable collecting device is fixedly installed at one end of the output shaft of the motor (4).

3. The device for adjusting the internal space of a cargo box according to claim 1, characterized in that, The web portion of the base frame (1) is provided with a slot and a threaded hole, and the partition plate (8) is snapped into the slot and fixedly connected by bolts.

4. A device for adjusting the internal space of a cargo box according to any one of claims 1 or 3, characterized in that, A cross steel cable guide is fixedly installed on the partition (8), and the steel cable (6) is installed in the steel cable guide. The steel cable (6) is embedded in the first pallet fixing support (51) and the second pallet fixing support (52) and is fixedly connected to both the first pallet fixing support (51) and the second pallet fixing support (52).

5. The device for adjusting the internal space of a cargo box according to claim 3, characterized in that, The length of the flange in the base frame (1) is 1000mm-1150mm, and the length of the web plate in the base frame (1) is 900mm-1050mm.

6. The device for adjusting the internal space of a cargo box according to claim 5, characterized in that, The base frame (1) has several crossbeams (9) symmetrically arranged on both sides of the web plate, and several threaded through holes are provided on the crossbeams (9).

7. The device for adjusting the internal space of a cargo box according to claim 4, characterized in that, The first pallet fixing support (51) and the second pallet fixing support (52) are both provided with grooves and threaded holes at the ends away from the slide (7).

8. The device for adjusting the internal space of a cargo box according to claim 7, characterized in that, The first tray fixing support (51) and the second tray fixing support (52) are fitted with the tray (11) inside the groove. The tray (11) is fixedly connected to the first tray fixing support (51) and the second tray fixing support (52) and the tray (11) by bolts.

9. A device for adjusting the internal space of a cargo box according to claim 8, characterized in that, The tray (11) is a box body, and a detachable box cover is provided on the top of the box body. Several threaded holes are provided on the end of the tray (11) away from the partition (8).

10. The device for adjusting the internal space of a cargo box according to claim 1, characterized in that, A tray locking device is fixedly installed on one end of the base frame (1) near the tray (11). The tray locking device can be raised and lowered longitudinally. The end of the tray (11) away from the partition (8) is connected to the tray locking device by bolts.

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