Packaging box suitable for heavy machine

Abstract

The utility model relates to the technical field of household appliance packaging, and discloses a packaging box suitable for a heavy machine, which comprises a bottom cover and an outer casing, a first support part is arranged in the bottom cover, and a middle cover is arranged on the upper side of the first support part; a second supporting part is arranged on the upper side of the middle cover and abuts against the inner surface of the outer cover shell. The bottom cover is arranged at the opening of the outer housing and is connected with the outer housing through a lock catch, and the bottom cover and the outer housing are respectively provided with lock holes for installing the lock catch. According to the scheme, all the assemblies are designed to be of a separated structure, and producers can conveniently package products and consumers can conveniently open packages. The bottom cover and the outer housing are connected through the lock catch, the shapes of all the components are matched, positioning is achieved in a contact abutting mode, additional rubber strips are not needed for fixed connection, and the advantages of being convenient to recycle and environmentally friendly are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliance packaging, in particular to a packaging box suitable for heavy machines. Background Art

[0002] After leaving the factory, home appliances need to be packaged and protected in packaging boxes to ensure safe transportation of the home appliances. The packaging boxes should play the role of fixing the products and buffering. As consumers' living standards improve and their environmental awareness increases, they have higher requirements for easy disassembly and assembly and environmentally friendly recycling of packaging boxes. At the same time, the structure of the packaging box has an important impact on the packaging efficiency of the manufacturer.

[0003] Chinese patent CN202321769341.6 discloses a home appliance packaging box, including a bottom plate, the top of the bottom plate is connected to the top plate through a support plate, and a placement space for placing home appliances is formed between the bottom plate, the support plate and the top plate; a protective plate. The home appliance packaging box is provided with a protective plate attached to one side of the support plate, and the protective plate is used to block the outside of the placement space for placing home appliances formed between the bottom plate, the support plate and the top plate, so as to protect the packaging box placed inside. By adding a side protective plate, the overall strength and stability of the box body can be increased, thereby reducing the impact of lateral impact on home appliances, and the side plate can share part of the top pressure and reduce the pressure on the home appliances. By having multiple reinforcement blocks on the protective plate, the protective plate is used to protect the internal packaging clamp. When the strength of the protective cardboard is reduced due to moisture, the strength of the protective plate can be enhanced by the reinforcement block, which greatly improves the strength of the protective plate while saving costs. However, the packaging box structure provided by this solution needs to be improved.

[0004] The utility model overcomes the shortcomings of the prior art and provides a packaging box suitable for heavy machines, which has the advantages of convenient assembly and disassembly and environmental protection. Utility Model Content

[0005] The main purpose of the utility model is to provide a packaging box suitable for heavy machines, comprising a bottom cover and an outer cover shell, wherein a first support portion is provided inside the bottom cover, a middle cover is provided on the upper side of the first support portion, the bottom cover covers the lower side of the first support portion, the middle cover covers the upper side of the first support portion, and the middle cover, the first support portion and the bottom cover enclose a first accommodating cavity;

[0006] A second supporting portion is provided on the upper side of the middle cover, the second supporting portion abuts against the inner surface of the outer cover shell, the second supporting portion and the middle cover form a second accommodating cavity, and the second accommodating cavity is communicated with the first accommodating cavity;

[0007] One side of the outer shell is open, and the other sides are closed; the bottom cover is arranged at the opening of the outer shell and connected to the outer shell via a lock; the bottom cover and the outer shell are respectively provided with lock holes for installing the lock;

[0008] The bottom cover and the outer cover shell form a third accommodating cavity, the first supporting portion, the middle cover and the second supporting portion are arranged inside the third accommodating cavity, the bottom cover contacts the inner surface of the outer cover shell, and the middle cover contacts the inner surface of the outer cover shell.

[0009] Optionally, the bottom cover includes a first bottom plate, a first enclosure plate is vertically extended from the edge of the first bottom plate, the first bottom plate is rectangular, and a lock hole for installing the lock buckle is provided on the first enclosure plate;

[0010] The rectangular opening shape surrounded by the first enclosure matches the shape of the first support portion, the inner side of the first enclosure contacts the first support portion, the outer side of the first enclosure contacts the inner surface of the outer cover shell, and the first bottom plate contacts the first support portion.

[0011] Optionally, the first supporting portion includes a second bottom plate, and first supporting plates are vertically extended from the left and right sides of the second bottom plate respectively, and the second bottom plate is located inside the bottom cover and contacts the first bottom plate; the size of the second bottom plate matches the size of the opening surrounded by the first enclosure, and the outer side of the first supporting plate contacts the inner side of the first enclosure.

[0012] Optionally, a circuit box is provided on the front side of the second bottom plate, and the circuit box is located between the first support plates.

[0013] A support column is provided at the rear side of the second bottom plate, the support column is formed by extending and bending the vertical edge of the first support plate, the height of the support column is the same as the height of the vertical edge of the first support plate, and the support column is vertically arranged to the second bottom plate;

[0014] A positioning plate is also provided on the upper surface of the second bottom plate, and edges of the positioning plate are respectively against the circuit box, the first supporting plate and the first enclosure plate.

[0015] Optionally, the middle cover includes a third bottom plate, the edge of the third bottom plate vertically extends out of the second enclosure plate, and the size of the third bottom plate matches that of the first bottom plate;

[0016] The opening formed by the second enclosing plate is arranged in a direction opposite to the opening formed by the first enclosing plate, the first support plate extends into the interior of the middle cover, the inner side of the second enclosing plate contacts the first support plate, the top end of the first support plate contacts the third bottom plate, and the outer side of the second enclosing plate contacts the inner surface of the outer cover shell;

[0017] The surface of the third bottom plate is provided with through holes and buckle holes.

[0018] Optionally, the second support portion is a cubic structure with an opening at the lower end, the opening of the second support portion contacts the third bottom plate, the opening of the second support portion is connected to the through hole, the edge of the second support portion extends outward and abuts against the inner surface of the outer cover shell, and a buckle hole is provided on the top of the second support portion.

[0019] Optionally, a lock hole for installing the lock buckle is provided at the open end of the outer cover shell, the depth inside the outer cover shell matches the height after the bottom cover, the first support part, the middle cover, and the second support part are installed in sequence, and buckle holes are provided on both sides of the outer cover shell.

[0020] Optionally, the lock buckle includes a first lock plate, a locking ring is provided in the middle of the first lock plate, the size of the locking ring matches the size of the lock hole, a locking buckle and a locking block are provided in the locking circle, the locking buckle is buckled with the locking block, and the locking buckle and the locking block are respectively connected to the second lock plate.

[0021] Optionally, the locking buckle is connected to the inner wall of the locking ring, the locking block is connected to the inner wall of the locking ring, the locking buckle and the locking block are arranged opposite to each other, the connection between the locking buckle and the locking ring is a flexible material, the locking buckle can rotate around the connection, the connection between the locking block and the locking ring is a flexible material, and the locking block can rotate around the connection.

[0022] Optionally, the locking ring is inserted into the lock hole, the first lock plate contacts the outer side of the outer cover shell, the locking block and the locking buckle are respectively rotated around the connection and then buckled, the second lock plate contacts the inner side of the bottom cover, and the first lock plate is parallel to the second lock plate.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The packaging box provided by the utility model divides the closed accommodating cavity formed by the bottom cover and the outer cover into two parts; the first part is surrounded by the bottom cover, the first support part and the middle cover, and can support and fix the lower half of the product; the second part is surrounded by the middle cover and the second support part, and can support and fix the upper half of the product; the middle cover is provided with a through hole connecting the two parts of the space, which plays the role of supporting and fixing the middle part of the product. Each component is designed as a separate structure, which is convenient for producers to package products and consumers to open the package. The bottom cover and the outer cover are connected by a lock, and the shapes of each component are matched. Positioning is achieved by contact and abutment, and no additional adhesive strips are required for fixing the connection, which has the advantages of easy recycling and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0026] Figure 1 This is a perspective schematic diagram of an embodiment of a packaging box of the utility model;

[0027] Figure 2 This is a schematic diagram of the bottom cover of the packaging box embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the embodiment of the packaging box of the utility model Figure 1 ;

[0029] Figure 4 This is a schematic diagram of the embodiment of the packaging box of the utility model Figure 2 ;

[0030] Figure 5 This is a schematic diagram of the embodiment of the packaging box of the utility model Figure 3 ;

[0031] Figure 6 This is a schematic diagram of the lock buckle of the packaging box embodiment of the utility model;

[0032] Figure 7 This is a front view of the lock buckle of the packaging box embodiment of the utility model;

[0033] Figure 8 This is a cross-sectional view of the lock buckle along AA of an embodiment of the packaging box of the utility model;

[0034] Fig. 9 This is a cross-sectional view of the lock buckle along the BB line of an embodiment of the packaging box of the utility model;

[0035] Fig.10 The figure is a schematic diagram of the lock assembly process of the packaging box embodiment of the utility model.

[0036] Reference numerals:

[0037] 1-bottom cover; 11-first bottom plate; 12-first enclosure; 2-outer cover shell; 3-first support part; 31-second bottom plate; 32-first support plate; 33-circuit box; 34-support column; 35-positioning plate; 4-middle cover; 41-third bottom plate; 42-second enclosure; 43-through hole; 5-second support part; 6-locking buckle; 61-first locking plate; 62-locking ring; 63-locking buckle; 64-locking block; 65-second locking plate; 7-locking hole; 8-buckle hole. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element, or there can be one or more centered elements between them. When an element is described as "connected" to another element, it can be directly connected to another element, or there can be one or more centered elements between them. The terms "vertical", "horizontal", "left", "right", "inside", "outside" and similar expressions used in this specification are only for illustrative purposes. In the description of the utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. The term "include" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may be present or added.

[0039] In addition, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. All technical and scientific terms used in this specification have the same meaning as those generally understood by technicians in the technical field of the present utility model. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] like Figure 1-9 , which is a schematic diagram of an embodiment of a packaging box for heavy machines provided by the utility model.

[0042] Please refer to Figure 1-9 This embodiment is used for packaging heavy machines. The heavy machines in this embodiment refer to large household appliances. Furthermore, they can be household appliances with fragile glass structures, and are particularly suitable for beverage refrigeration appliances with glass containers.

[0043] This embodiment includes a bottom cover 1 and an outer shell 2. A first support portion 3 is provided inside the bottom cover 1. A middle cover 4 is provided on the upper side of the first support portion 3. The bottom cover 1 covers the lower side of the first support portion 3. The middle cover 4 covers the upper side of the first support portion 3. The middle cover 4, the first support portion 3 and the bottom cover 1 form a first accommodating cavity. A second support portion 5 is provided on the upper side of the middle cover 4. The second support portion 5 abuts against the inner surface of the outer shell 2 to prevent the second support portion 5 from shaking inside the outer shell 2. The second support portion 5 and the middle cover 4 form a second accommodating cavity, and the second accommodating cavity is connected to the first accommodating cavity.

[0044] One side of the outer shell 2 is open, and the other sides are closed. The bottom cover 1 is arranged at the opening of the outer shell, and is connected to the outer shell 2 through a lock 6. The bottom cover 1 and the outer shell 2 are respectively provided with lock holes 7 for installing the lock 6. The bottom cover 1 and the outer shell 2 form a third accommodating cavity, and the first support part 3, the middle cover 4, and the second support part 5 are arranged inside the third accommodating cavity. The bottom cover 1 contacts the inner surface of the outer shell 2, and the middle cover 4 contacts the inner surface of the outer shell 2. The bottom cover 1 and the middle cover 4 position and fix the first support part 3 to prevent the first support part 3 from shaking inside the outer shell 2.

[0045] The bottom cover 1 and the outer cover shell 2 form a closed third accommodating chamber, and the third accommodating chamber is divided into a first accommodating chamber and a second accommodating chamber. The first accommodating chamber is used to install and accommodate the bottom of the fixed product, and the second accommodating chamber is used to accommodate the glass structure on the upper side of the fixed product.

[0046] In one embodiment, the bottom cover 1 includes a first bottom plate 11, a first enclosure 12 vertically extends from the edge of the first bottom plate 11, the first bottom plate 11 is rectangular, the first enclosure 12 is provided with a lock hole 7 for installing the lock buckle 6, the number of the lock holes 7 is 4, and there is a lock hole 7 on each side of the front and back. The rectangular opening shape surrounded by the first enclosure 12 matches the shape of the first support portion 3, the inner side of the first enclosure 12 contacts the first support portion 3, the outer side of the first enclosure 12 contacts the inner surface of the outer cover shell 2, and the first bottom plate 11 contacts the first support portion 3.

[0047] The bottom cover 1 is a cubic structure with one end open. The first bottom plate 11 and the first enclosure plate 12 are an integrated structure. The bottom cover 1 is obtained by bending a flat cardboard. The cardboard slits and the bending and locking are conventional designs and will not be described in detail. The outer cover shell 2 is sleeved on the bottom cover 1, and its size matches the bottom cover 1, that is, the outer side of the first enclosure plate 12 contacts the inner surface of the outer cover shell 2. The outer cover shell 2 realizes the horizontal positioning of the bottom cover 1, and the relative displacement between the bottom cover 1 and the outer cover shell 2 is limited by the lock buckle 6.

[0048] In one embodiment, the first support portion 3 includes a second bottom plate 31, and first support plates 32 are vertically extended from the left and right sides of the second bottom plate 31, respectively. The second bottom plate 31 is located inside the bottom cover 1 and contacts the first bottom plate 11. The size of the second bottom plate 31 matches the size of the opening surrounded by the first enclosure 12, and the outer side of the first support plate 32 contacts the inner side of the first enclosure 12.

[0049] Furthermore, a circuit box 33 is provided on the front side of the second bottom plate 31, and the circuit box 33 is located between the first support plates 32, and is used to place the power cord and instructions of the packaged product. A support column 34 is provided on the rear side of the second bottom plate 31, and the support column 34 is formed by extending and bending the vertical edge of the first support plate 32, and the height of the support column 34 is the same as the height of the vertical edge of the first support plate 32. The support column 34 is vertically arranged with the second bottom plate 31, and the support column 34 is used to strengthen the support strength of the first support plate 32.

[0050] A positioning plate 35 is also provided on the upper surface of the second bottom plate 31, and the edges of the positioning plate 35 are respectively in contact with the circuit box 33, the first support plate 32, and the first enclosure 12. The positioning plate 31 is specifically a cross-shaped flat plate structure, and its front and rear ends are respectively in contact with the outer side of the circuit box 33 and the inner side of the first enclosure 12, and the left and right ends are respectively in contact with the inner side of the first support plate 32. The positioning plate 35 plays the role of opening the bottom of the first support portion 3.

[0051] The second bottom plate 31, the first support plate 32, the circuit box 33 and the support column 34 are an integrated structure obtained by bending a flat cardboard. The cardboard slits and the bending and positioning are conventional designs and will not be described in detail.

[0052] In one embodiment, the middle cover 4 includes a third bottom plate 41, and a second enclosure plate 42 extends vertically from the edge of the third bottom plate 41, and the third bottom plate 41 matches the size of the first bottom plate 11. The opening formed by the second enclosure plate 42 is arranged opposite to the opening formed by the first enclosure plate 12, the first support plate 32 extends into the middle cover 4, the inner side of the second enclosure plate 42 contacts the first support plate 32, the top end of the first support plate 32 contacts the third bottom plate 41, and the outer side of the second enclosure plate 42 contacts the inner surface of the outer cover shell 2. The surface of the third bottom plate 41 is provided with a through hole 43 and a buckle hole 8.

[0053] The structure of the middle cover 4 is similar to that of the bottom cover 1, except that the middle cover 4 is provided with a through hole 43 for the glass container of the product to pass through, and a buckle hole 8 for the user to separate the middle cover 4 from the product when removing the package. The middle cover 4 is used to position and fix the middle part of the electrical product, especially to position and fix the glass container of a beverage refrigeration appliance with a glass container, so as to prevent the glass container from shaking due to horizontal displacement in the outer cover shell 2. The third bottom plate 41 and the second enclosure plate 42 are an integrated structure obtained by bending a flat cardboard. The cardboard slits and the bending and positioning are conventional designs and will not be described in detail.

[0054] In one embodiment, the second support portion 5 is a cubic structure with an opening at the lower end, the opening of the second support portion 5 contacts the third bottom plate 41, the opening of the second support portion 5 is connected to the through hole 43, the edge of the second support portion 5 extends outward and abuts against the inner surface of the outer cover shell 2, and a buckle hole 8 is provided on the top of the second support portion 5.

[0055] The opening edge of the second support portion 5 is tangent to the through hole 43. The second support portion 5 is used to cover the glass container of the product, cover the glass container, and protect the glass container. The edge of the second support portion 5 extends outward and abuts against the inner surface of the outer cover shell 2, so that the second support portion 5 is horizontally positioned inside the outer cover shell 2 to avoid shaking. The second support portion 5 is obtained by bending a flat cardboard. The cardboard slits and the bending and positioning are conventional designs and will not be described in detail.

[0056] In one embodiment, the open end of the outer shell 2 is provided with a lock hole 7 for installing the lock buckle 6, and the position and number of the lock holes of the outer shell 2 correspond to the position and number of the lock holes of the bottom cover 1. The depth of the inner part of the outer shell 2 matches the height of the bottom cover 1, the first support part 3, the middle cover 4, and the second support part 5 after being installed in sequence, so as to realize the vertical positioning of the internal components. Buckle holes 8 are respectively provided on both sides of the outer shell 2.

[0057] In one embodiment, if Figure 6-9 As shown, the lock buckle 6 includes a first lock plate 61, a locking ring 62 is provided in the middle of the first lock plate 61, the size of the locking ring 62 matches the size of the lock hole 7, a locking buckle 63 and a locking block 64 are provided in the locking circle 62, the locking buckle 63 is buckled with the locking block 64, and the locking buckle 63 and the locking block 64 are respectively connected to the second lock plate 65.

[0058] Furthermore, the locking buckle 63 is connected to the inner wall of the locking ring 62, the locking block 64 is connected to the inner wall of the locking ring 62, the locking buckle 63 and the locking block 64 are arranged opposite to each other, the connection between the locking buckle 63 and the locking ring 62 is a flexible material, the locking buckle 63 can rotate around the connection, the connection between the locking block 64 and the locking ring 62 is a flexible material, the locking block 64 can rotate around the connection. The flexible material is specifically a plastic material, and the rotation is achieved by making the material at the connection thin.

[0059] The locking ring 62 is inserted into the lock hole 7, the first lock plate 61 contacts the outer side of the outer shell 2, the locking block 64 and the locking buckle 63 rotate around the connection and then buckle together, the second lock plate 65 contacts the inner side of the bottom cover 1, at this time the first lock plate 61 is parallel to the second lock plate 65, and the bottom cover 1 and the outer shell 2 are locked. The locking block 64 is pressed to separate the locking block 64 from the locking buckle 63, the locking block 64 and the locking buckle 63 rotate around the connection so that the second lock plate 65 is no longer in contact with the inner side of the bottom cover 1, and the second lock plate 65 is parallel to the axis of the locking ring 62, and the lock buckle 6 can be taken out of the lock hole 7 to unlock the bottom cover 1 and the outer shell 2.

[0060] like Fig.10 As shown, when assembling the packaging box of this embodiment, first assemble the first support part 3 with the bottom cover 1, then place the packaged product on the bottom cover 1, and then cover the middle cover 4. The glass container of the product passes through the through hole 43 of the middle cover 4, and the second support part 5 is covered on the middle cover 4 to cover the glass container. Finally, the outer cover 2 is covered from the second support part 5 at the top downward to align with the bottom cover 1 at the bottom, and the two are locked by the lock 6 to complete the packaging. When removing the package, just follow the reverse operation of the assembly process. The packaging box of this embodiment has the advantages of easy disassembly and assembly, convenience and speed.

[0061] In summary, the packaging box provided in this embodiment divides the closed accommodating cavity formed by the bottom cover and the outer cover into two parts; the first part is surrounded by the bottom cover, the first support part and the middle cover, and can support and fix the lower half of the product; the second part is surrounded by the middle cover and the second support part, and can support and fix the upper half of the product; the middle cover is provided with a through hole connecting the two parts of the space, which plays the role of supporting and fixing the middle part of the product. Each component is designed as a separate structure, which is convenient for producers to package products and consumers to open the package. The bottom cover and the outer cover are connected by a lock, and the shapes of each component are matched. Positioning is achieved by contact and abutment, and no additional adhesive strips are required for fixing the connection, which has the advantages of easy recycling and environmental protection.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A packaging box suitable for heavy machines, characterized in that: It comprises a bottom cover and an outer shell, wherein a first support portion is provided inside the bottom cover, a middle cover is provided on the upper side of the first support portion, the bottom cover covers the lower side of the first support portion, the middle cover covers the upper side of the first support portion, and the middle cover, the first support portion and the bottom cover form a first accommodating cavity; A second supporting portion is provided on the upper side of the middle cover, the second supporting portion abuts against the inner surface of the outer cover shell, the second supporting portion and the middle cover form a second accommodating cavity, and the second accommodating cavity is communicated with the first accommodating cavity; One side of the outer shell is open, and the other sides are closed; the bottom cover is arranged at the opening of the outer shell and connected to the outer shell via a lock; the bottom cover and the outer shell are respectively provided with lock holes for installing the lock; The bottom cover and the outer cover shell form a third accommodating cavity, the first supporting portion, the middle cover and the second supporting portion are arranged inside the third accommodating cavity, the bottom cover contacts the inner surface of the outer cover shell, and the middle cover contacts the inner surface of the outer cover shell.

2. The packaging box suitable for heavy machines according to claim 1, characterized in that: The bottom cover comprises a first bottom plate, a first enclosure plate vertically extends from the edge of the first bottom plate, the first bottom plate is rectangular, and a lock hole for installing the lock buckle is provided on the first enclosure plate; The rectangular opening shape surrounded by the first enclosure matches the shape of the first support portion, the inner side of the first enclosure contacts the first support portion, the outer side of the first enclosure contacts the inner surface of the outer cover shell, and the first bottom plate contacts the first support portion.

3. The packaging box suitable for heavy machines according to claim 2, characterized in that: The first supporting portion includes a second bottom plate, and first supporting plates are vertically extended from the left and right sides of the second bottom plate respectively. The second bottom plate is located inside the bottom cover and contacts the first bottom plate. The size of the second bottom plate matches the size of the opening surrounded by the first enclosure, and the outer side of the first supporting plate contacts the inner side of the first enclosure.

4. The packaging box suitable for heavy machines according to claim 3, characterized in that: A circuit box is provided on the front side of the second bottom plate, and the circuit box is located between the first support plates. A support column is provided at the rear side of the second bottom plate, the support column is formed by extending and bending the vertical edge of the first support plate, the height of the support column is the same as the height of the vertical edge of the first support plate, and the support column is vertically arranged to the second bottom plate; A positioning plate is also provided on the upper surface of the second bottom plate, and edges of the positioning plate are respectively against the circuit box, the first supporting plate and the first enclosure plate.

5. The packaging box suitable for heavy machines according to claim 3, characterized in that: The middle cover comprises a third bottom plate, the edge of the third bottom plate vertically extends out of the second enclosure plate, and the size of the third bottom plate matches that of the first bottom plate; The opening formed by the second enclosing plate is arranged in a direction opposite to the opening formed by the first enclosing plate, the first support plate extends into the interior of the middle cover, the inner side of the second enclosing plate contacts the first support plate, the top end of the first support plate contacts the third bottom plate, and the outer side of the second enclosing plate contacts the inner surface of the outer cover shell; The surface of the third bottom plate is provided with through holes and buckle holes.

6. The packaging box suitable for heavy machines according to claim 5, characterized in that: The second support portion is a cubic structure with an opening at the lower end, the opening of the second support portion contacts the third bottom plate, the opening of the second support portion is connected to the through hole, the edge of the second support portion extends outward and abuts against the inner surface of the outer cover shell, and a buckle hole is provided on the top of the second support portion.

7. The packaging box suitable for heavy machines according to claim 1, characterized in that: The open end of the outer cover shell is provided with a lock hole for installing the lock buckle, the depth inside the outer cover shell matches the height after the bottom cover, the first support part, the middle cover and the second support part are installed in sequence, and buckle holes are respectively provided on both sides of the outer cover shell.

8. The packaging box suitable for heavy machines according to claim 1, characterized in that: The lock buckle includes a first lock plate, a locking ring is provided in the middle of the first lock plate, the size of the locking ring matches the size of the lock hole, a locking buckle and a locking block are provided in the locking circle, the locking buckle is buckled with the locking block, and the locking buckle and the locking block are respectively connected to the second lock plate.

9. The packaging box suitable for heavy machines according to claim 8, characterized in that: The locking buckle is connected to the inner wall of the locking ring, the locking block is connected to the inner wall of the locking ring, the locking buckle and the locking block are arranged opposite to each other, the connection between the locking buckle and the locking ring is a flexible material, the locking buckle can rotate around the connection, the connection between the locking block and the locking ring is a flexible material, and the locking block can rotate around the connection.

10. The packaging box suitable for heavy machines according to claim 9, characterized in that: The locking ring is inserted into the locking hole, the first locking plate contacts the outer side of the outer cover shell, the locking block and the locking buckle are respectively rotated around the connection and then buckled, the second locking plate contacts the inner side of the bottom cover, and the first locking plate is parallel to the second locking plate.

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