A high load capacity corrugated paper box for packaging parts

Abstract

The present application relates to a kind of packages, specifically to a kind of high load capacity part packaging corrugated box, solve the technical problems that existing packaging carton cannot meet the requirement of customer, must use full carton structure, cannot use any wood component or plastic product, inside need small package, small package cannot be capped and other requirements, and because part is easily deformed, cannot participate in load, and in the case of single box weight 450kg, it requires to be stacked to 6 layers, paper box load needs to reach 2.25 tons of loading and storage and transport requirements.The high load capacity part packaging corrugated box of the present application, including the outer paper box of cuboid structure, the outer paper box includes upper cover, fence, bottom support, N the inner paper box of cuboid structure is set in outer paper box and the connecting plate set in inner paper box;Connecting plate is wrapped by each folding surface after folding, so that folding surface A, folding surface B, folding surface C, folding surface D are tightly connected after folding.

Description

Technical Field

[0001] This invention relates to packaging, specifically to a corrugated cardboard box for packaging high-load-bearing parts. Background Technology

[0002] Currently, the "paper instead of wood" solution is widely promoted for the outer cardboard boxes of component export packaging. Therefore, heavy-duty corrugated cardboard boxes are mostly used for packaging, and their load-bearing capacity is generally no more than 500 kg. If it is necessary to increase the load-bearing capacity, it is generally accomplished by using components to participate in the load-bearing or by adding wooden components inside, so that the weight of the products loaded in the existing outer cardboard boxes does not exceed 800 kg.

[0003] Chinese patent CN220810177U discloses "A High-Density, High-Load-Bearing Carton," which achieves diagonal support through a first support plate, a second support plate, an inclined plate, protrusions, concave blocks, connecting blocks, storage slots, and card slots. The corrugated cardboard, fixing plate, and springs enhance the compression resistance and load-bearing capacity, effectively preventing deformation and increasing stability. Chinese patent CN210592909U discloses "A Packaging Carton with an Integrated Divider," comprising a rectangular outer carton with an internal divider that divides it into four independent compartments. The outer carton and dividers are made from a single folded piece of cardboard. This design organically combines the traditional outer carton and divider, facilitating transportation and storage, simplifying carton handling, and providing greater compression and breakage resistance than traditional dividers.

[0004] However, none of the above-mentioned packaging cartons can meet the customer's requirements that the packaging must use a full cardboard box structure, that no wooden components or plastic products can be used, that there must be small packages inside, that the small packages cannot be covered, that the parts are easily deformed and cannot be used for load-bearing, and that with a single box weight of 450kg, the stacking must reach 6 layers, and the cardboard box must be able to bear a load of 2.25 tons for loading and storage. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems that existing packaging cartons cannot meet customer requirements such as requiring packaging to use an all-carton structure, prohibiting the use of any wooden components or plastic products, requiring internal small packages, and prohibiting the small packages from being covered, as well as the technical problems that parts are easily deformed and cannot participate in load-bearing, and requiring stacking to reach 6 layers with a single carton weight of 450kg, and the carton load-bearing capacity to reach 2.25 tons for loading and storage. The invention provides a corrugated carton with high load-bearing capacity for parts packaging.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-load-bearing corrugated cardboard box for packaging parts includes a rectangular outer cardboard box, which includes a top cover, side panels, and a bottom support. Its special feature is that the outer cardboard box is made of corrugated cardboard.

[0008] It also includes N cuboid inner cartons set inside the outer cartons and connecting plates set inside the inner cartons, where N≥2;

[0009] The inner carton includes a rectangular base plate and folded surfaces A, B, C, and D connected to the four sides of the base plate, respectively. Folded surfaces A and C are positioned opposite each other and have the same structure; folded surfaces B and D are positioned opposite each other and have the same structure; folded surfaces A, B, C, and D, along with the base plate, are formed by folding a single sheet of corrugated paper to create the inner carton; the length, width, and height of the outer carton are integer multiples of the length, width, and height of the inner carton; the unfolded length of the inner carton is y+4h, and the width is x+4h, where y is the length, x is the width, and h is the height.

[0010] Folded surfaces A, B, C, and D are respectively provided with a first fold line between themselves and the base plate; each of folded surfaces A, B, C, and D has a second fold line parallel to the corresponding first fold line along its middle section, and each folded surface is folded inward along the second fold line so that its outer edge coincides with the corresponding first fold line; folded surfaces B and D are respectively provided with a wrap-around folded surface on both sides, and a slot is provided between the wrap-around folded surface and the adjacent folded surface A or C; the wrap-around folded surface is used to be wrapped by folded surfaces A and C after folding.

[0011] The connecting plate is made of corrugated cardboard and includes a main body of the same size as the base plate, two side plates connected to the two short sides of the main body, and four side ears connected to the two sides of the two side plates. The main body, side plates and four side ears form an I-shaped structure. Fold lines are provided between the main body and the side plates, and between the side plates and the side ears. The main body is used to form the bottom of the inner carton together with the base plate. The side plates are used to be wrapped by folding surfaces A and C after folding. The four side ears are used to be wrapped by folding surfaces B and D after folding, so that folding surfaces A, B, C and D are tightly connected after folding.

[0012] Furthermore, it also includes multiple first insertion holes, multiple second insertion holes, multiple protrusions adapted to the first insertion holes and second insertion holes, and multiple slots adapted to the protrusions; the multiple first insertion holes are respectively disposed on the four edges of the base plate; the multiple second insertion holes are respectively disposed on the two short side edges of the body; the multiple slots are disposed on the long side edges of the body; the multiple protrusions are respectively disposed on the outer sides of folding surfaces A, B, C, and D, for inserting into the corresponding first insertion holes, second insertion holes, and latches into the corresponding slots after folding.

[0013] Further, the folded surface A is divided into an outer auxiliary plate a1 and an inner auxiliary plate a2 by the second fold line; the folded surface B is divided into an outer auxiliary plate b1 and an inner auxiliary plate b2 by the second fold line; the folded surface C is divided into an outer auxiliary plate c1 and an inner auxiliary plate c2 by the second fold line; the folded surface D is divided into an outer auxiliary plate d1 and an inner auxiliary plate d2 by the second fold line; the ear-shaped folded surfaces are respectively provided on the short sides of the outer auxiliary plate b1 and the inner auxiliary plate b2 along the width direction, and on the short sides of the outer auxiliary plate d1 and the inner auxiliary plate d2 along the width direction, and a groove is provided between adjacent ear-shaped folded surfaces to facilitate folding; the protrusions are respectively provided on the outer side of the inner auxiliary plate a2 along the length direction, the outer side of the inner auxiliary plate b2 along the length direction, the outer side of the inner auxiliary plate c2 along the length direction, and the outer side of the inner auxiliary plate d2 along the length direction.

[0014] Furthermore, a first handle is provided on the enclosure; a second handle is provided on the outer auxiliary plate a1 and outer auxiliary plate c1 at a position corresponding to the first handle; a third handle is provided on the inner auxiliary plate a2 and inner auxiliary plate c2 at a position corresponding to the first handle; a fourth handle is provided on the side plate at a position corresponding to the first handle; an arc-shaped groove adapted to the first handle is provided on the outer side of the folding surface of the cover away from the outer auxiliary plate b1, inner auxiliary plate b2, outer auxiliary plate d1, and inner auxiliary plate d2, so that the handle position can be left empty after folding.

[0015] Furthermore, it also includes paper pillars that fit the four inner corners of the enclosure; the paper pillars are formed by folding a single sheet of corrugated paper to create paper corner protectors.

[0016] Furthermore, it also includes a first partition disposed between each layer of inner cartons and a second partition disposed on the topmost inner carton.

[0017] Furthermore, the second partition is made of honeycomb cardboard.

[0018] Furthermore, the height direction of the outer carton, inner carton, and connecting plate are all in the corrugated direction of the corrugated paper to improve the stacking strength of the carton.

[0019] The beneficial effects of this invention are:

[0020] 1. The present invention provides a high load-bearing capacity corrugated cardboard box for packaging parts. The overall packaging box is divided into an inner cardboard box and an outer cardboard box. The inner cardboard box is a new type of combined folding cardboard box without a lid. The outer cardboard box is a nested corrugated cardboard box that can be stacked in multiple layers, so that the overall packaging box can meet the higher loading and storage requirements of customers.

[0021] 2. The present invention provides a high load-bearing capacity corrugated cardboard box for packaging parts, which uses a connecting plate to fasten folded surfaces A, B, C and D together, and uses multiple protrusions to insert into the first insertion hole, the second insertion hole and the tenon into the slot after folding, so as to achieve a connection without staples or glue.

[0022] 3. This invention provides a high-load-bearing corrugated cardboard box for parts packaging. Folding surface A is divided into an outer auxiliary plate a1 and an inner auxiliary plate a2 by a second fold line; folding surface B is divided into an outer auxiliary plate b1 and an inner auxiliary plate b2 by a second fold line; folding surface C is divided into an outer auxiliary plate c1 and an inner auxiliary plate c2 by a second fold line; and folding surface D is divided into an outer auxiliary plate d1 and an inner auxiliary plate d2 by a second fold line. This results in a double-layer folding structure for each folding surface. When the connecting plate is placed in the space formed by the double-layer folding structure after folding, the two short sides of the box have five layers of cardboard, and the long side has three layers of cardboard. This provides extremely high edge pressure load, and the lidless structure of the inner cardboard box can bear a load of over 40 kg.

[0023] 4. The present invention provides a high load-bearing capacity corrugated cardboard box for packaging parts. After the flap folds, the handle position can be left empty. After the inner cardboard box and connecting plate are folded into a box and placed into the outer cardboard box, the handle is made of five layers of cardboard. Each inner cardboard box can carry manually handled products weighing up to 20kg, avoiding the risk of breakage at the handle.

[0024] 5. The present invention provides a high load-bearing capacity corrugated cardboard box for packaging parts. The four inner corners of the side panel are also provided with matching paper pillars, which can increase the rigidity and stacking strength of the whole box. In addition, the top layer of the inner cardboard box is placed with honeycomb cardboard to improve the overall compressive strength.

[0025] 6. The present invention provides a high load-bearing capacity corrugated cardboard box for parts packaging, which combines an inner cardboard box with honeycomb cardboard, paper corner protectors, and an outer cardboard box. It is made entirely of paper material and has an extremely high load-bearing capacity, capable of supporting more than 2.5 tons without requiring the product to bear the weight.

[0026] 7. This invention provides a high-load-bearing corrugated cardboard box for packaging parts. The entire box can be stacked up to 6 layers on-site, with a total stacking height of 3.6 meters. It can be used for direct stacking in warehouses without shelving, has a wide range of applications, and is easy to dispose of as waste after unpacking. It contains no wood, plastic or other materials and can meet customer requirements. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the outer cardboard box in an embodiment of a high-load-bearing corrugated cardboard box for packaging parts according to the present invention;

[0028] Figure 2 This is a schematic diagram of the inner cardboard box structure in an embodiment of a high-load-bearing corrugated cardboard box for packaging parts according to the present invention;

[0029] Figure 3 This is a schematic diagram of the unfolded inner carton structure in an embodiment of a high-load-bearing corrugated cardboard box for packaging parts according to the present invention;

[0030] Figure 4 This is a schematic diagram of the unfolded connecting plate in an embodiment of a high-load-bearing corrugated cardboard box for packaging parts according to the present invention;

[0031] Figure 5 This is a schematic diagram of the paper corner protectors in an embodiment of a high-load-bearing corrugated cardboard box for packaging parts according to the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the second partition in an embodiment of a high-load-bearing corrugated cardboard box for packaging parts according to the present invention.

[0033] Explanation of reference numerals in the attached drawings: 1-Outer carton, 11-Top cover, 12-Side panel, 13-Bottom support, 14-First handle; 2-Inner carton, 21-Bottom plate, 22-First insertion hole, 23-Slot, 24-Ear folding surface, 25-Protrusion, 26-Gate, 27-Second handle, 28-Third handle; 3-Connecting plate, 31-Body, 32-Side plate, 33-Side ear, 34-Second insertion hole, 35-Slot, 36-Fourth handle; 4-Paper column, 5-Second partition. Detailed Implementation

[0034] like Figure 1 , Figure 2 As shown, a high-load-bearing corrugated cardboard box for packaging parts includes an outer cardboard box 1 with a rectangular structure and N inner cardboard boxes 2, and a connecting plate 3 disposed in the inner cardboard boxes 2; the outer cardboard box 1 is a corrugated cardboard box with a rectangular structure, including a top cover 11, a side panel 12 and a bottom support 13, and the top cover 11, the side panel 12 and the bottom support 13 form the outer packaging; the inner cardboard boxes 2 are disposed inside the outer cardboard box 1, and N≥2.

[0035] like Figure 3As shown, the inner carton 2 has a cuboid structure, including a rectangular base plate 21 and folding surfaces A, B, C, and D connected to the four sides of the base plate 21 respectively. Folding surfaces A and C are opposite each other and have the same structure; folding surfaces B and D are opposite each other and have the same structure. Folding surfaces A, B, C, and D, along with the base plate 21, are formed by folding a single sheet of corrugated paper to create the inner carton 2. The length of the outer carton 1 is an integer multiple of the length of the inner carton 2, its width is an integer multiple of the width of the inner carton 2, and its height is an integer multiple of the width of the inner carton 2. A first fold line is provided between surface A, folded surface B, folded surface C, folded surface D and the base plate 21 respectively; folded surface A, folded surface B, folded surface C, folded surface D are all provided with a second fold line parallel to the corresponding first fold line along their middle part, and each folded surface is folded inward along the second fold line so that its outer edge coincides with the corresponding first fold line. Folded surface B and folded surface D are provided with a wrapping folded surface 24 on both sides respectively, and a slot 23 is provided between the wrapping folded surface 24 and the adjacent folded surface A or folded surface C. The wrapping folded surface 24 is used to be wrapped by folded surface A and folded surface C after folding.

[0036] like Figure 4 As shown, the connecting plate 3 is made of corrugated cardboard and includes a body 31 of the same size as the base plate 21, two side plates 32 connected to the two short sides of the body 31 respectively, and four side ears 33 connected to the two sides of the two side plates 32 respectively; the body 31, the side plates 32 and the four side ears 33 form an I-shaped structure; fold lines are provided between the body 31 and the side plates 32, and between the side plates 32 and the side ears 33 respectively; the body 31 is used to form the bottom of the inner carton 2 together with the base plate 21, the side plates 32 are used to be wrapped by folding surfaces A and C after folding, and the four side ears 33 are used to be wrapped by folding surfaces B and D after folding.

[0037] Preferably, the base plate 21 has a plurality of first insertion holes 22 on its four edges; the two short edges of the body 31 have a plurality of second insertion holes 34, and the long edges have a plurality of slots 35; the second insertion holes 34 and slots 35 are the same size as the first insertion holes 22; the outer edges of the folded surfaces A, B, C, and D have a plurality of protrusions 25, which are used to insert into the corresponding first insertion holes 22, second insertion holes 34 and the latches into the corresponding slots 35 after folding.

[0038] For greater stability, the folded surface A of this invention is divided into an outer auxiliary plate a1 and an inner auxiliary plate a2 by a second fold line; the folded surface B is divided into an outer auxiliary plate b1 and an inner auxiliary plate b2 by a second fold line; the folded surface C is divided into an outer auxiliary plate c1 and an inner auxiliary plate c2 by a second fold line; and the folded surface D is divided into an outer auxiliary plate d1 and an inner auxiliary plate d2 by a second fold line. This makes each folded surface a double-layer folded structure. When the connecting plate 3 is placed in the space formed by the double-layer folded structure after folding, the connection between folded surfaces A, B, C, and D is more secure. This results in the inner carton 2 having five layers of cardboard on its two short sides and three layers of cardboard on its long sides after assembly, increasing its strength. The ear-shaped folded surfaces 24 are respectively set on the outer auxiliary plate b1 and the inner auxiliary plate b2 along the width. On the short side of the outer auxiliary plate d1 and the short side of the inner auxiliary plate d2 along the width direction, grooves 26 are provided between adjacent folding surfaces 24 to facilitate folding; protrusions 25 are respectively provided on the outer side of the inner auxiliary plate a2 along the length direction, the outer side of the inner auxiliary plate b2 along the length direction, the outer side of the inner auxiliary plate c2 along the length direction, and the outer side of the inner auxiliary plate d2 along the length direction; the protrusions 25 are used to lock the folded parts into the corresponding slots 35, which are easy to operate and easy to lock and unlock; in this embodiment, the unfolded length of the inner carton 2 is y+4h+g, and the width is x+4h+g, where y is the length of the inner carton 2, x is the width of the inner carton 2, h is the height of the inner carton 2, and g is the height of the protrusion 25, which is 30.

[0039] In this embodiment, a first handle 14 is provided on the enclosure panel 12; second handles 27 are respectively provided on the outer auxiliary panels a1 and c1 at positions corresponding to the first handle 14; third handles 28 are provided on the inner auxiliary panels a2 and c2 at positions corresponding to the first handle 14; a fourth handle 36 is provided on the side panel 32 at a position corresponding to the first handle 14; an arc-shaped groove adapted to the first handle 14 is provided on the outer side of the folding surface 24 away from the outer auxiliary panel b1, inner auxiliary panel b2, outer auxiliary panel d1, and inner auxiliary panel d2, so that the handle positions can be vacated after folding. The first handle 14, second handle 27, third handle 28, and fourth handle 36 are all convenient for transport.

[0040] like Figure 5 , Figure 6As shown, the four inner corners of the partition 12 are also equipped with matching paper pillars 4, which enhance the overall rigidity of the outer carton 1 and improve the stacking strength. The paper pillars 4 are formed by folding a single sheet of corrugated paper to create paper corner protectors. A first partition is provided between each layer of the inner carton 2 to separate the upper and lower layers of inner carton 2, ensuring even stress distribution along the edges of the carton. A second partition 5 is provided on the top inner carton 2, and the second partition 5 is made of honeycomb cardboard, which enhances the overall compressive strength of the carton and distributes the compressive strength more evenly across the carton. To improve the stacking strength of the carton, the height direction of the outer carton 1, inner carton 2, and connecting plate 3 are all in the corrugated direction of the corrugated paper. Multiple layers of inner carton 2 can be placed inside the outer carton 1, with each layer of inner carton 2 separated by ordinary cardboard. A honeycomb cardboard is placed on the top layer to improve the overall compressive strength.

[0041] This invention discloses a high-load-bearing corrugated cardboard box for parts packaging, which can meet the higher loading and storage requirements of customers. It adopts an outer cardboard box 1 + inner cardboard box 2 to form a combined folding cardboard box. The inner cardboard box 2 is a small cardboard box of 300mm×400mm without a lid. It can be folded from a single sheet of corrugated paper without the need for glue or nails. It relies on its own structure to lock into the box after folding. The edges of the cardboard box can provide extremely high edge crush strength. The outer cardboard box 1 adopts a nested box type. By using 3A type corrugated paper, paper corner protectors are added to the four sides of the inner side of the outer cardboard box 1 to form paper pillars 4 for support, which further improves the edge crush strength of the cardboard box.

[0042] The outer cardboard box 1 and inner cardboard box 2, once sealed, can be stacked up to 6 layers high, with a total stacking height of 3.6 meters. This allows for direct stacking in warehouses without shelving, making it widely applicable. It is also convenient to dispose of waste after unpacking, as it contains no wood or plastic products, thus meeting customer requirements.

[0043] The assembly method of the corrugated cardboard box for packaging high-load-bearing parts according to the present invention specifically includes the following steps:

[0044] 1) Assemble the inner cardboard box 2:

[0045] 1.1 Unfold the inner carton 2, then lay the connecting plate 3 flat on the unfolded inner carton 2, and place the body 31 of the connecting plate 3 corresponding to the bottom plate 21 of the inner carton 2.

[0046] 1.2. Fold the side plate 32 and the side ear 33 at 90° along the fold lines between the main body 31 and the side plate 32, and between the side plate 32 and the side ear 33.

[0047] 1.3 Fold the outer auxiliary plate b1 and outer auxiliary plate d1 at 90° along the first fold line between the outer auxiliary plate b1 and the bottom plate 21 and make them stick to the side ears 33 of the connecting plate 3. Fold the inner auxiliary plate b2 and inner auxiliary plate d2 inward by 180° along the second fold line. Then wrap the side ears 33 of the connecting plate 3 with the folding surface 24. Then insert the protrusion 25 into the corresponding slot 35 and the first insertion hole 22 to fix the body 31 on the bottom plate 21 of the inner carton 2.

[0048] 1.4 Fold the outer auxiliary plate a1 and outer auxiliary plate c1 up 90° along the first fold line between the outer auxiliary plate a1 and the bottom plate 21 and make them stick to the side plate 32 of the connecting plate 3. Fold the inner auxiliary plate a2 and inner auxiliary plate c2 inward 180° along the second fold line to wrap the side plate 32 of the connecting plate 3. Then insert the protrusion 25 into the corresponding second insertion hole 34 and first insertion hole 22 to make the folded surfaces A, B, C and D tightly connected. The inner carton 2 is now folded.

[0049] 2】Assemble outer carton 1:

[0050] 2.1 Place the bottom tray 13 of the outer cardboard box 1 on the ground, then insert the surrounding panel 12 into the bottom tray 13, and place the paper pillars 4 around its interior.

[0051] 2.2 Place N inner cardboard boxes 2 inside outer cardboard box 1, and place one first partition on each layer until the last layer is placed with one second partition 5;

[0052] 2.3 Place the top cover 11 over the second partition 5 and the surrounding panel 12 and pack it up to complete the packaging folding.

Claims

1. A high-load-bearing corrugated cardboard box for packaging parts, comprising a rectangular outer cardboard box (1), the outer cardboard box (1) comprising a top cover (11), side panels (12) and a bottom support (13), characterized in that: The outer carton (1) is made of corrugated cardboard; It also includes N cuboid inner cartons (2) set inside the outer carton (1) and connecting plates (3) set in the inner cartons (2), where N≥2; The inner carton (2) includes a rectangular base plate (21) and folding surfaces A, B, C, and D connected to the four sides of the base plate (21), respectively. Folding surfaces A and C are arranged opposite each other and have the same structure; folding surfaces B and D are arranged opposite each other and have the same structure; folding surfaces A, B, C, and D and the base plate (21) are folded together using a single sheet of corrugated paper to form the inner carton (2); the length of the outer carton (1) is an integer multiple of the length of the inner carton (2), the width is an integer multiple of the width of the inner carton (2), and the height is an integer multiple of the width of the inner carton (2); the unfolded length of the inner carton (2) is y+4h, and the width is x+4h, where y is the length of the inner carton (2), x is the width of the inner carton (2), and h is the height of the inner carton (2); A first fold line is provided between the folded surfaces A, B, C, and D and the base plate (21); a second fold line parallel to the corresponding first fold line is provided along the middle of each of the folded surfaces A, B, C, and D, and each folded surface is folded inward along the second fold line so that its outer side coincides with the corresponding first fold line. A wrap-around folded surface (24) is provided on both sides of the folded surfaces B and D, and a slot (23) is provided between the wrap-around folded surface (24) and the adjacent folded surface A or folded surface C; the wrap-around folded surface (24) is used to be wrapped by the folded surfaces A and C after folding. The connecting plate (3) is made of corrugated paper and includes a body (31) of the same size as the bottom plate (21), two side plates (32) connected to the two short sides of the body (31) respectively, and four side ears (33) connected to the two sides of the two side plates (32) respectively. The body (31), side plates (32) and four side ears (33) form an I-shaped structure. Fold lines are provided between the body (31) and the side plates (32) and between the side plates (32) and the side ears (33). The body (31) is used to form the bottom of the inner carton (2) together with the bottom plate (21). The side plates (32) are used to be wrapped by folding surfaces A and C after folding. The four side ears (33) are used to be wrapped by folding surfaces B and D after folding, so that folding surfaces A, B, C and D are tightly connected after folding.

2. The high-load-bearing capacity corrugated cardboard box for packaging parts according to claim 1, characterized in that: It also includes multiple first insertion holes (22), multiple second insertion holes (34), multiple protrusions (25) adapted to the first insertion holes (22) and the second insertion holes (34), and multiple slots (35) adapted to the protrusions (25); Multiple first insertion holes (22) are respectively disposed on the four edges of the base plate (21); Multiple second insertion holes (34) are respectively disposed on the two short side edges of the body (31); Multiple slots (35) are provided on the long side edge of the body (31); Multiple protrusions (25) are respectively provided on the outer sides of folded surfaces A, B, C, and D, for insertion into the corresponding first insertion hole (22), second insertion hole (34) and latch into the corresponding slot (35) after folding.

3. The high-load-bearing capacity corrugated cardboard box for packaging parts according to claim 2, characterized in that: The folded surface A is divided into an outer auxiliary plate a1 and an inner auxiliary plate a2 by the second fold line; The folded surface B is divided into an outer auxiliary plate b1 and an inner auxiliary plate b2 by the second fold line; The folded surface C is divided into an outer auxiliary plate c1 and an inner auxiliary plate c2 by the second fold line; The folded surface D is divided into an outer auxiliary plate d1 and an inner auxiliary plate d2 by the second fold line; The folding surfaces (24) of the ear cover are respectively provided on the short side of the outer auxiliary plate b1 and the inner auxiliary plate b2 along the width direction, and on the short side of the outer auxiliary plate d1 and the inner auxiliary plate d2 along the width direction. A groove (26) is provided between adjacent folding surfaces (24) of the ear cover to facilitate folding. The protrusions (25) are respectively disposed on the outer side of the inner auxiliary plate a2 along the length direction, the outer side of the inner auxiliary plate b2 along the length direction, the outer side of the inner auxiliary plate c2 along the length direction, and the outer side of the inner auxiliary plate d2 along the length direction.

4. The high-load-bearing capacity corrugated cardboard box for packaging parts according to claim 3, characterized in that: The enclosure (12) is provided with a first handle (14); The outer auxiliary plate a1 and the outer auxiliary plate c1 are respectively provided with second handles (27) at positions corresponding to the first handle (14); The inner auxiliary plate a2 and the inner auxiliary plate c2 are provided with a third handle (28) at a position corresponding to the first handle (14); A fourth handle (36) is provided on the side plate (32) at a position corresponding to the first handle (14); The outer side of the folded surface (24) away from the outer auxiliary plate b1, inner auxiliary plate b2, outer auxiliary plate d1, and inner auxiliary plate d2 is provided with an arc-shaped groove that matches the first handle (14), so that the handle position can be left empty after folding.

5. The high-load-bearing capacity corrugated cardboard box for packaging parts according to claim 4, characterized in that: It also includes paper pillars (4) that are adapted to the four interior corners of the enclosure (12); The paper pillar (4) is formed by folding a piece of corrugated paper to create a paper corner protector.

6. The high-load-bearing capacity corrugated cardboard box for packaging parts according to claim 5, characterized in that: It also includes a first partition disposed between each inner carton (2) and a second partition (5) disposed on the uppermost inner carton (2).

7. The high-load-bearing capacity corrugated cardboard box for packaging parts according to claim 6, characterized in that: The second partition (5) is made of honeycomb paperboard.

8. The high-load-bearing capacity corrugated cardboard box for packaging parts according to claim 1, characterized in that: The height direction of the outer carton (1), the inner carton (2) and the connecting plate (3) are all in the corrugated direction of the corrugated paper to improve the stacking strength of the carton.

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