Motorcycle metal packing box

Abstract

The application discloses a motorcycle metal packaging box, which comprises a bottom frame in a rectangular shape, vertical supporting bars fixed on the top surface of the bottom frame and located at four corners respectively, transverse supporting bars arranged between two adjacent vertical supporting bars, limiting insertion holes I arranged on the top surface of the transverse supporting bars and close to the two ends of the transverse supporting bars respectively, corner connecting pieces arranged on the top of the vertical supporting bars, the corner connecting pieces comprising top connecting plates arranged on the top of the vertical supporting bars and the top surfaces of two adjacent transverse supporting bars at the same time, limiting insertion pieces I inserted into the two limiting insertion holes I respectively and formed by bending the edges of the top connecting plates, side connecting plates respectively formed by bending the edges of the top connecting plates and attached to the outer side surfaces of the two transverse supporting bars, and limiting protrusions I arranged on the inner side surfaces of the side connecting plates and used for abutting against the bottom of the transverse supporting bar. The vertical supporting bars located at the corners can be connected to the vertical supporting bars through the corner connecting pieces, and the motorcycle metal packaging box is convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the packaging box technical field, and particularly relates to a motorcycle metal packaging box. BACKGROUND

[0002] During the transportation of motorcycles to the sales points in the whole country or even abroad, the motorcycles are placed in packaging boxes, and the motorcycles are transported together with the packaging boxes. The main function of the packaging box is to facilitate loading and unloading during transportation, and to be quickly moved by a crane or a forklift; secondly, to protect the motorcycle and prevent the motorcycle from being damaged during transportation, thereby improving the unpacking qualification rate of the motorcycle. Therefore, in the prior art, most packaging boxes are corrugated paper packaging boxes, plastic packaging boxes, wooden packaging boxes or metal packaging boxes, which protect the motorcycle.

[0003] However, the corrugated paper packaging box, the plastic packaging box and the wooden packaging box are inevitably damaged in the transportation process due to the strength of the material, which affects the quality of the motorcycle inside, and therefore more and more packaging boxes are made of metal. The main structure of the common metal packaging box includes a rectangular bottom frame, four vertical support bars are welded at the four corners of the top surface of the bottom frame, and then horizontal support bars are installed between the four vertical support bars. The conventional method for installing the horizontal support bars is to connect them by bolts, which requires punching holes on the horizontal support bars and the vertical support bars for installation, or to weld the horizontal support bars and the vertical support bars directly by a welding machine. When the packaging box is disassembled later, the bolts need to be removed or a cutting knife needs to be used to cut the packaging box, which is relatively complicated to operate, and cutting the support bars will damage the support bars and cannot be recycled. SUMMARY

[0004] In view of the above problems of the prior art, the technical problem to be solved by the present application is how to provide a motorcycle metal packaging box which is easy to assemble, reduces the difficulty of assembly and disassembly, and is convenient for recycling.

[0005] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] A motorcycle metal packaging box, including a rectangular bottom frame, the top surface of the bottom frame and located at the four corner positions are respectively fixedly connected with vertical support bars, the center line direction of the vertical support bars is perpendicular to the plane where the bottom frame is located, the adjacent two vertical support bars and extend in the opposite direction are provided with horizontal support bars, the horizontal support bars are located at the top position of the two vertical support bars, the top surface of the horizontal support bar and close to the position of both ends are respectively provided with limiting insertion holes I, the top of the vertical support bar is provided with a corner connecting piece, the corner connecting piece includes a top connecting plate which is simultaneously arranged on the top of the vertical support bar and the top surface of the two adjacent horizontal support bars, the edge of the top connecting plate is bent to form a limiting insert piece I which is inserted into the two limiting insertion holes I on the side, the limiting insertion hole I can limit the movement of the limiting insert piece I in the direction parallel to the plane where the bottom frame is located, the edge of the top connecting plate and respectively corresponding to the position of the outer side surface of the two horizontal support bars are bent to form a side connecting plate which is bent to the side of the bottom frame, the inner side surface of the side connecting plate is attached to the outer side surface of the horizontal support bar and the side surface of the vertical support bar on the side, the inner side surface of the side connecting plate and corresponding to the bottom position of the horizontal support bar on the side is provided with at least one limiting protrusion I for abutting the bottom of the horizontal support bar, the limiting protrusion I is used for limiting the movement of the horizontal support bar to the side of the bottom frame; the limiting baffle is punched on the top connecting plate.

[0007] In the application, when used, first weld and fix each vertical support bar at four corners of the bottom frame, then get two horizontal support bars, place the two horizontal support bars at the mounting positions on both sides of the vertical support bar respectively, then get the corner connecting piece, place the corner connecting piece above the two horizontal support bars, make the inner side surfaces of the two side connecting parts align with the outer side surfaces of the two horizontal support bars respectively, and make the limiting insert piece I above the limiting insert hole I at the end position of the horizontal support bar, then install the corner connecting piece downward; in this process, the limiting insert piece I is inserted into the limiting insert hole I, and the side connecting plate needs to be moved outward due to the block of the limiting protrusion I, so that the side connecting plate is elastically deformed, and then the limiting protrusion I avoids the horizontal support bar, until the limiting protrusion I moves below the horizontal support bar, and at this time, the top connecting plate is placed on the top surfaces of the two horizontal support bars, the side connecting plate returns to the original state, so that the limiting protrusion I abuts against the bottom of the horizontal support bar, and the top mounting plate is supported on the top of the vertical support bar, and then the limiting protrusion I can support the horizontal support bar below, and the limiting insert piece I limits the horizontal support bar transversely, and finally the four horizontal support bars are fixed on the four vertical support bars through the corner connecting pieces at four corners. In the subsequent disassembly process, only a certain force needs to be applied to the side connecting plate, the side connecting plate is elastically deformed, the limiting protrusion I avoids the interference of the horizontal support bar, the corner connecting piece is taken out upward, and then the horizontal support bar can be disassembled. The structure is simple, convenient and reliable, and the material can be recycled. In addition, during transportation, in order to fully utilize the space of the transport vehicle, the packaging boxes are usually overlapped and stacked. The limiting stop piece in the application can limit and constrain the upper packaging box, and further reduce the damage to the packaging box during transportation.

[0008] As an optimization, the inner side surface of the side connecting plate is provided with a groove I extending from the edge of the side connecting plate toward the side direction of the top connecting plate, the groove I is a concave structure formed by stamping the inner side surface of the side connecting plate toward the outer side direction of the side connecting plate, and an arch cavity I is formed between the groove I and the outer side surface of the corresponding horizontal support bar. The side connecting plate can be elastically deformed by using a crowbar or the like, and when used, one end of the crowbar is inserted into the arch cavity I, the end of the crowbar abuts against the outer side surface of the horizontal support bar, and the roller body abuts against the side connecting plate, then the side connecting plate is pried, so that the connecting plate deforms outward, and then the limiting protrusion I avoids the interference of the horizontal support bar.

[0009] As an optimization, the number of the limiting protrusions I on the same side connecting plate is two, and they are located on both sides of the groove I along the extension direction of the groove I.

[0010] As an optimization, the limiting protrusion I is a convex structure formed by punching the outer side of the side connecting plate towards the inner side of the side connecting plate. By punching, the material is saved.

[0011] As an optimization, the projection of the limiting baffle in the direction perpendicular to the plane of the bottom frame is located on the inner side of the projection of the two adjacent transverse support bars in the direction perpendicular to the plane of the bottom frame, the limiting baffle is an arc-shaped sheet structure, the limiting baffle is perpendicular to the top connecting plate and the arc-shaped convex surface thereof faces the side of the vertical support bar on the side thereof. At this time, the limiting baffle can extend into the interior of the bottom frame of the upper packaging box, thereby limiting and restraining the upper packaging box, and improving the stability of the overlapping stacking during transportation. The arc-shaped sheet structure of the limiting baffle can increase the strength thereof.

[0012] As an optimization, a plurality of transverse connecting bars are arranged between a group of oppositely arranged transverse support bars and spaced apart in a direction parallel to the length direction of the transverse support bars, the transverse connecting bars extend in the opposite direction of the oppositely arranged transverse support bars, and the two ends of the transverse connecting bars are respectively fixedly connected with a top mounting plate, the top mounting plate is arranged on the top surface of the transverse support bar on the side thereof, a limiting insertion hole II is arranged on the top surface of the transverse support bar corresponding to the position of the top mounting plate, a limiting insertion piece II is formed on the plate surface of the top mounting plate by punching towards the lower side of the top mounting plate, the limiting insertion piece II is inserted into the limiting insertion hole II, and a side mounting plate is bent and formed on the outer side surface of the transverse support bar on the side thereof corresponding to the position of the edge of the top mounting plate towards the direction of the bottom frame, the inner side surface of the side mounting plate is attached to the outer side surface of the transverse support bar on the side thereof, a groove II is arranged on the inner side surface of the side mounting plate extending towards the direction of the bottom frame from the edge of the side mounting plate towards the direction of the top mounting plate, the groove II is a concave structure formed by punching the inner side surface of the side mounting plate towards the outer side of the side mounting plate, an arch cavity II is formed between the groove II and the outer side surface of the transverse support bar corresponding thereto, and a limiting protrusion II for abutting against the bottom of the transverse support bar is arranged on the inner side surface of the side mounting plate and located on both sides of the groove II in the extension direction of the groove II. The limiting protrusion II is used for limiting the movement of the side mounting plate away from the direction of the bottom frame, the limiting protrusion II is a convex structure formed by punching the outer side surface of the side mounting plate towards the inner side of the side mounting plate. The transverse connecting bar is used for increasing the overall connecting strength of the packaging box. During installation, the two ends of the top mounting plate are arranged on the top surface of the transverse support bar, and the limiting protrusion II and the limiting insertion piece II are used for limiting, so that the two ends of the transverse connecting bar are respectively fixed on the two corresponding transverse support bars.

[0013] As optimization, the bottom frame comprises a set of long channel steels arranged oppositely and in parallel, short channel steels are arranged between two long channel steels and at positions respectively at two ends of the two long channel steels, the length of the long channel steels is greater than the length of the short channel steels, the short channel steels extend in the opposite direction of the two long channel steels and are fixedly connected at the inner sides of the two long channel steels at two ends respectively, the opening directions of the long channel steels and the short channel steels are at the same side, the inner side edges of the long channel steels and the short channel steels are respectively bent to form flanges towards the inside of the bottom frame, the first and last of the four flanges are fixedly connected in sequence, the outer side edges of the long channel steels and the short channel steels are respectively bent to form cavity structures extending in parallel to the length direction of the long channel steels or the short channel steels; the bottom of the vertical support bar is fixedly connected in the groove at the end of the long channel steel and the short channel steel at the side thereof, a notch is formed on the inner side edge of the end of the long channel steel for the vertical support bar to pass through, and the inner side edge of the end of the long channel steel can be used to limit the movement of the vertical support bar towards the outside of the end of the short channel steel on the corresponding vertical support bar.

[0014] As optimization, at least one short side reinforcing bar is arranged between two adjacent vertical support bars and above the short channel steel, the two ends of the short side reinforcing bar are fixedly connected to the two vertical support bars and extend in the opposite direction of the two vertical support bars, or the two ends of the short side reinforcing bar are fixedly connected in the groove of the horizontal support bar and the short channel steel and are arranged obliquely.

[0015] As optimization, when the short side reinforcing bar is connected to the horizontal support bar and the short channel steel and the number is even, the short side reinforcing bars are symmetrically arranged with the middle line of the length direction of the short channel steel as the axis of symmetry.

[0016] As optimization, at least one long-side vertical reinforcing strip is arranged between the two adjacent vertical supporting strips and above the long strip channel, the long-side vertical reinforcing strip extends along the length direction of the vertical supporting strip and is fixed at the transverse supporting strip and the groove of the long strip channel respectively, when the number of long-side vertical reinforcing strips is at least two, all the long-side vertical reinforcing strips are arranged at intervals along the extending direction of the long strip channel, a long-side oblique reinforcing strip is arranged between the vertical supporting strip and the adjacent long-side vertical reinforcing strip, the long-side oblique reinforcing strip is arranged obliquely and is fixed at the transverse supporting strip and the groove of the long strip channel respectively, one long-side oblique reinforcing strip on the same side and the adjacent long-side vertical reinforcing strip are arranged with a transverse reinforcing strip fixedly connected thereto respectively, and the extending direction of the transverse reinforcing strip is parallel to the extending direction of the long strip channel. The short-side reinforcing strip and the long-side reinforcing strip can increase the strength of the whole packaging box.

[0017] Compared with the prior art, the transverse supporting strip at the corner can be connected to the vertical supporting strip through the corner connecting piece, that is, plug and play, simple and convenient to install and disassemble, and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a top view of the bottom frame in embodiment 1 of the application;

[0019] Figure 2 is a front view of the installation structure of the short-side reinforcing strip in embodiment 1 of the application;

[0020] Figure 3 is a front view of the installation structure of the long-side vertical reinforcing strip and the long-side oblique reinforcing strip in embodiment 1 of the application;

[0021] Figure 4 is a side view of the connection structure of the long strip channel and the short strip channel in embodiment 1 of the application;

[0022] Figure 5 is a top view of the connection structure of the long strip channel and the short strip channel in embodiment 1 of the application;

[0023] Figure 6 is a top view of the installation structure of the corner connecting piece in embodiment 1 of the application;

[0024] Figure 7 is Figure 6 is a front view;

[0025] Figure 8 is a front view of the installation structure of the short-side reinforcing strip in embodiment 2 of the application. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Generally, the components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided with the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0027] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present application, it should also be explained that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "linkage" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] Embodiment 1

[0029] As Figures 1 to 7As shown, the motorcycle metal packaging box in the specific embodiment includes a bottom frame in a rectangular shape, the top surface of the bottom frame and the positions of four corners are respectively fixedly connected with vertical support bars 1, the center line direction of the vertical support bars 1 is perpendicular to the plane where the bottom frame is located, the adjacent two vertical support bars 1 and the opposite direction thereof are provided with horizontal support bars 2, the horizontal support bars 2 are located at the top position of the two vertical support bars 1, the top surface of the horizontal support bar 1 and the positions close to the two ends thereof are respectively provided with limiting insertion holes I, the top of the vertical support bar 1 is provided with a corner connecting piece, the corner connecting piece includes a top connecting plate 3 which is simultaneously arranged on the top of the vertical support bar 1 and the top surfaces of the adjacent two horizontal support bars 2, the edge of the top connecting plate 3 is bent to form limiting insertion pieces I4 which are respectively inserted into the two limiting insertion holes I on the side thereof, the limiting insertion holes I can limit the movement of the limiting insertion pieces I4 in the direction parallel to the plane where the bottom frame is located, the edge of the top connecting plate 3 and the positions corresponding to the outer side surfaces of the two horizontal support bars 2 are respectively bent to form side connecting plates 5 which are bent towards the side direction of the plane where the bottom frame is located, the inner side surface of the side connecting plate 5 is attached to the outer side surface of the horizontal support bar 2 and the side surface of the vertical support bar 1 on the side thereof, in addition, the two side connecting plates 5 can be welded in the specific implementation, for increasing the strength of the two side connecting plates 5, the inner side surface of the side connecting plate 5 and the bottom position of the horizontal support bar 2 on the side thereof are provided with at least one limiting protrusion I6 for abutting against the bottom of the horizontal support bar 2, the limiting protrusion I6 is used for limiting the movement of the horizontal support bar 2 towards the side direction of the plane where the bottom frame is located; the top connecting plate 3 is provided with a limiting baffle 8 which is punched upwards from the top connecting plate 3. In addition, the limiting insertion piece I and the limiting protrusion I are matched with the horizontal support bar 2, for limiting the upward and downward movement of the corner connecting piece.

[0030] In the specific embodiment, the inner side surface of the side connecting plate 5 is provided with a groove I7 which is arranged in the extending direction of the groove I7 and extends from the edge of the side connecting plate 5 towards the side direction of the top connecting plate 3, the groove I7 is a concave structure which is punched from the inner side surface of the side connecting plate 5 towards the outer side direction of the side connecting plate 5, and an arch cavity I is formed between the groove I7 and the outer side surface of the horizontal support bar 2 corresponding to the groove I7.

[0031] In the specific embodiment, the number of the limiting protrusions I6 on the same side connecting plate 5 is two, and the two limiting protrusions I6 are respectively located on the two sides of the groove I7 in the extending direction of the groove I7.

[0032] In the specific embodiment, the limiting protrusion I6 is a convex structure which is punched from the outer side surface of the side connecting plate 5 towards the inner side direction of the side connecting plate 5.

[0033] In the specific embodiment, the limiting baffle 8 is located on the inner side of the projections of the two adjacent transverse support bars 2 in the direction perpendicular to the plane of the bottom frame, the limiting baffle 8 is in an arc-shaped sheet structure, and the limiting baffle 8 is perpendicular to the top connecting plate 3 and the arc-shaped convex surface thereof faces the side of the vertical support bar 1 on the same side.

[0034] In the specific embodiment, a plurality of transverse connecting bars are arranged between a group of oppositely arranged transverse support bars 2 and spaced apart along the length direction of the transverse support bars 2, the transverse connecting bars extend in the opposite direction of the oppositely arranged transverse support bars 2, and the two ends of each transverse connecting bar are fixedly connected with a top mounting plate, the top mounting plate is arranged on the top surface of the transverse support bar 2 on the same side, the top surface of the transverse support bar 2 is provided with a limiting insertion hole II corresponding to the position of the top mounting plate, a limiting insertion piece II is formed on the plate surface of the top mounting plate by punching towards the lower side of the top mounting plate, the limiting insertion piece II is inserted into the limiting insertion hole II, the edge of the top mounting plate corresponding to the position of the outer side surface of the transverse support bar 2 on the same side is bent towards the direction of the bottom frame to form a side mounting plate, the inner side surface of the side mounting plate is attached to the outer side surface of the transverse support bar on the same side, the inner side surface of the side mounting plate is provided with a groove II extending towards the direction of the top mounting plate from the edge of the side mounting plate towards the direction of the bottom frame, the groove II is a concave structure formed by punching the inner side surface of the side mounting plate towards the outer side of the side mounting plate, an arch cavity II is formed between the groove II and the outer side surface of the corresponding transverse support bar 2, and limiting protrusions II are arranged on the inner side surface of the side mounting plate and located on both sides of the groove II in the extension direction of the groove II, respectively, for abutting against the bottom of the transverse support bar 2, the limiting protrusions II are used for limiting the movement of the side mounting plate towards the direction away from the bottom frame, and the limiting protrusions II are convex structures formed by punching the outer side surface of the side mounting plate towards the inner side of the side mounting plate.

[0035] In the specific embodiment, the bottom frame comprises a set of long channel steel 9 arranged oppositely and in parallel, a short channel steel 10 is arranged between two long channel steels 9 and at the position of the two ends of the two long channel steels 9 respectively, the length of the long channel steel 9 is greater than the length of the short channel steel 10, the short channel steel 10 extends in the opposite direction of the two long channel steels 9 and its two ends are fixedly connected to the inner side of the two long channel steels 9 respectively, the opening direction of the long channel steel 9 and the short channel steel 10 is located on the same side, the inner side of the long channel steel 9 and the short channel steel 10 is bent to form a flange 11 on the top of the side, the head and tail of the four flanges 11 are fixedly connected together in turn, the outer side of the long channel steel 9 and the short channel steel 10 is bent to form a cavity structure 12 extending in parallel to the length direction of the long channel steel 9 or the short channel steel 10; the bottom of the vertical support bar 1 is fixedly connected in the groove at the end of the long channel steel 9 and the short channel steel 10 on the side, a notch is formed on the inner side of the end of the long channel steel 9 for the vertical support bar 1 to pass through, the inner side of the end of the long channel steel 9 can be used to limit the movement of the vertical support bar 1 towards the outer side of the end of the short channel steel 10 on the corresponding vertical support bar 1.

[0036] In the specific embodiment, at least one short edge reinforcing bar 13 is arranged between the two adjacent vertical support bars 1 and above the short channel steel 10, the two ends of the short edge reinforcing bar 13 are fixedly connected to the two vertical support bars 1 respectively and extend in the opposite direction of the two vertical support bars 1.

[0037] In the specific embodiment, at least one long edge vertical reinforcing bar 14 is arranged between the two adjacent vertical support bars 1 and above the long channel steel 9, the long edge vertical reinforcing bar 14 extends in parallel to the length direction of the vertical support bar 1 and its two ends are fixed in the groove of the horizontal support bar 2 and the long channel steel 9 respectively, when the number of long edge vertical reinforcing bars 14 is at least two, all the long edge vertical reinforcing bars 14 are arranged in parallel to the extension direction of the long channel steel 9, a long edge diagonal reinforcing bar 15 is further arranged between the vertical support bar 1 and its adjacent long edge vertical reinforcing bar 14, the long edge diagonal reinforcing bar 15 is arranged obliquely and its two ends are fixed in the groove of the horizontal support bar 2 and the long channel steel 9 respectively, one of the long edge diagonal reinforcing bars 15 on the same side and its adjacent long edge vertical reinforcing bar 14 are provided with a horizontal reinforcing bar 16 fixedly connected thereto respectively, the extension direction of the horizontal reinforcing bar 16 is parallel to the extension direction of the long edge channel steel 9.

[0038] Example 2

[0039] As Figure 8As shown, as another embodiment of the present application, in the specific embodiment, two ends of the short-side reinforcing bar 13 are fixedly connected to the transverse support bar 2 and the channel of the short-bar channel steel 10 respectively and are arranged obliquely. The number of the short-side reinforcing bars 13 is two, and the short-side reinforcing bars 13 are symmetrically arranged with the middle line of the length direction of the short-bar channel steel 10 as the axis of symmetry.

[0040] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described by referring to the preferred embodiments of the present application, it should be understood by those skilled in the art that various changes can be made in form and details without departing from the spirit and scope of the present application as defined by the appended claims.

Claims

1. A motorcycle metal packaging box, comprising a rectangular-shaped bottom frame, vertical support bars are fixedly connected to the top surface of the bottom frame at positions located at four corners respectively, the center line direction of the vertical support bars is perpendicular to the plane where the bottom frame is located, transverse support bars are arranged between two adjacent vertical support bars and extend in the opposite direction of the two vertical support bars, and the transverse support bars are located at the top positions of the two vertical support bars, characterized in that: The top surface of the transverse support bar is provided with a limiting insertion hole I near both ends, and the top of the vertical support bar is provided with a corner connecting piece. The corner connecting piece includes a top connecting plate arranged on the top of the vertical support bar and the top surfaces of two adjacent transverse support bars. The edges of the top connecting plate are bent to form limiting insertion pieces I inserted into the limiting insertion holes I on the two sides. The limiting insertion holes I can limit the movement of the limiting insertion pieces I in the direction parallel to the plane of the bottom frame. The edges of the top connecting plate are bent to form side connecting plates corresponding to the outer side surfaces of the two transverse support bars. The inner side surfaces of the side connecting plates are attached to the outer side surfaces of the transverse support bars and the side surfaces of the vertical support bar. The inner side surfaces of the side connecting plates are provided with at least one limiting protrusion I corresponding to the bottom of the transverse support bar on the side. The limiting protrusion I limits the movement of the transverse support bar in the direction of the bottom frame. The top connecting plate is provided with a limiting stop piece punched upwards. The inner side surface of the side connecting plate is provided with a groove I extending from the edge of the side connecting plate towards the side of the top connecting plate. The groove I is a concave structure punched from the inner side surface of the side connecting plate towards the outer side surface of the side connecting plate. The groove I and the outer side surface of the corresponding transverse support bar form an arch cavity I.

2. The motorcycle metal packaging case according to claim 1, characterized by: The number of limiting protrusions I on the same side connecting plate is two, and they are located on both sides of the groove I in the extension direction of the groove I.

3. The motorcycle metal packaging case according to claim 1, characterized by: The limiting protrusion I is a convex structure punched from the outer side surface of the side connecting plate towards the inner side surface of the side connecting plate.

4. The motorcycle metal packaging case according to claim 1, characterized by: The projection of the limiting stop piece in the direction perpendicular to the plane of the bottom frame is located on the inner side of the projection of the two adjacent transverse support bars in the direction perpendicular to the plane of the bottom frame. The limiting stop piece is an arc-shaped piece structure. The limiting stop piece is perpendicular to the top connecting plate, and the arc-shaped convex surface faces the side of the vertical support bar on the side.

5. The motorcycle metal packaging case according to claim 1, characterized by: The plurality of transverse connecting strips are arranged between the relative transverse support strips and along the length direction of the transverse support strips, and extend in the opposite direction of the relative transverse support strips, and the two ends of the transverse connecting strips are respectively fixedly connected with a top mounting plate, the top mounting plate is arranged on the top surface of the transverse support strip on the side thereof, the top surface of the transverse support strip is provided with a limiting insertion hole II at the position corresponding to the top mounting plate, the plate surface of the top mounting plate is provided with a limiting insertion piece II formed by stamping towards the lower side of the top mounting plate, the limiting insertion piece II is inserted into the limiting insertion hole II, the edge of the top mounting plate is bent to form a side mounting plate towards the side of the bottom frame, the inner side of the side mounting plate is attached to the outer side of the transverse support strip on the side thereof, the inner side of the side mounting plate is provided with a groove II extending towards the side of the top mounting plate from the edge of the side mounting plate towards the side of the bottom frame, the groove II is a concave structure formed by stamping the inner side of the side mounting plate towards the outer side of the side mounting plate, an arch cavity II is formed between the groove II and the outer side of the transverse support strip corresponding thereto, and the inner side of the side mounting plate is respectively provided with a limiting protrusion II for abutting against the bottom of the transverse support strip on both sides of the groove II along the extension direction of the groove II, the limiting protrusion II is used for limiting the movement of the side mounting plate towards the side away from the side of the bottom frame, and the limiting protrusion II is a convex structure formed by stamping the outer side of the side mounting plate towards the inner side of the side mounting plate.

6. The motorcycle metal packaging case according to claim 1, characterized by: The bottom frame comprises a group of long groove steels arranged oppositely and in parallel, a short groove steel is arranged between the two long groove steels and at the position of the two ends of the two long groove steels, the length of the long groove steel is greater than the length of the short groove steel, the short groove steel extends in the opposite direction of the two long groove steels and is fixedly connected to the inner side of the two long groove steels at the two ends thereof, the opening direction of the long groove steel and the short groove steel is on the same side, the top of the inner side edge of the long groove steel and the short groove steel is bent to form a flange towards the inner side of the bottom frame, the four flanges are fixedly connected in sequence, and the outer side edge of the long groove steel and the short groove steel is bent to form a cavity structure extending in parallel to the length direction of the long groove steel or the short groove steel; the bottom of the vertical support strip is fixedly connected in the groove at the end of the long groove steel and the short groove steel on the side thereof, a notch is formed on the inner side edge of the end of the long groove steel for the vertical support strip to pass through, and the inner side edge of the end of the long groove steel can be used for limiting the movement of the vertical support strip towards the outer side of the end of the short groove steel on the corresponding vertical support strip.

7. The motorcycle metal packaging case according to claim 6, characterized by: At least one short edge reinforcing strip is arranged between the two adjacent vertical support strips and at the position above the short groove steel, the two ends of the short edge reinforcing strip are respectively fixedly connected to the two vertical support strips and extend in the opposite direction of the two vertical support strips, or the two ends of the short edge reinforcing strip are respectively fixedly connected in the groove of the transverse support strip and the short groove steel and are arranged obliquely.

8. The motorcycle metal packaging case according to claim 7, characterized by: When the short side reinforcing bars are connected with the transverse support bars and the short strip channel steels and the number is even, the short side reinforcing bars are symmetrically arranged with the middle line of the short strip channel steel length direction as the symmetric axis.

9. The motorcycle metal packaging case according to claim 6, characterized by: At least one long side vertical reinforcing bar is arranged between the two adjacent vertical support bars and above the long strip channel steel, the long side vertical reinforcing bar extends along the length direction of the vertical support bar and is fixed at the groove of the transverse support bar and the long strip channel steel at both ends, when the number of the long side vertical reinforcing bars is at least two, all the long side vertical reinforcing bars are arranged at intervals along the extending direction of the long strip channel steel, a long side oblique reinforcing bar is further arranged between the vertical support bar and the adjacent long side vertical reinforcing bar, the long side oblique reinforcing bar is arranged obliquely and is fixed at the groove of the transverse support bar and the long strip channel steel at both ends, one long side oblique reinforcing bar on the same side and the adjacent long side vertical reinforcing bar are arranged with the transverse reinforcing bars fixedly connected therewith, the extending direction of the transverse reinforcing bar is parallel to the extending direction of the long side channel steel.

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